TWI740932B - Touch panel, display device, optical sheet and screening method of optical sheet - Google Patents

Abstract

本發明係提供一種具有戶外防眩性、可抑制解像性之降低並且觸控面板之操作性優異之觸控面板、顯示裝置、光學片及光學片的篩選方法。 The present invention provides a touch panel, a display device, an optical sheet, and a screening method for an optical sheet that have outdoor anti-glare properties, can suppress the decrease in resolution, and have excellent operability of the touch panel.

本發明之觸控面板係於操作者側之表面具有凹凸者，上述凹凸將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra_2.5)為0.10μm以上0.60μm以下，並且上述凹凸面之摩擦係數滿足特定之條件。 The touch panel of the present invention has unevenness on the surface of the operator side, and the arithmetic mean roughness (Ra _2.5 ) of JIS B0601: 1994 when the cut-off value of the unevenness is set to 2.5 mm is 0.10 μm or more and 0.60 μm or less, and The friction coefficient of the above-mentioned uneven surface satisfies specific conditions.

Description

觸控面板、顯示裝置、光學片及光學片的篩選方法 Touch panel, display device, optical sheet and screening method of optical sheet

本發明係關於一種觸控面板、顯示裝置、光學片及光學片的篩選方法。 The invention relates to a touch panel, a display device, an optical sheet, and a screening method of the optical sheet.

近年來，於顯示裝置搭載有觸控面板之附帶觸控面板之顯示裝置急速地普及。 In recent years, display devices with touch panels equipped with touch panels in display devices have rapidly spread.

此種附帶觸控面板之顯示裝置由於為中型以下(20英吋以下~15英吋之A4型、未達15英吋~超過11英吋之B5型)，尤其是小型以下(11英吋以下)之尺寸而於攜帶時便利，故而大多於太陽光會入射至畫面之戶外或車內等中使用。因此，為了防止太陽光之映入，而期待對觸控面板之表面賦予防眩性。 This type of display device with a touch panel is below the medium size (under 20 inches ~ 15 inches A4 type, under 15 inches ~ more than 11 inches B5 type), especially small (under 11 inches) The size of) is convenient for carrying, so it is mostly used outdoors or in a car, etc. where sunlight will enter the screen. Therefore, in order to prevent the reflection of sunlight, it is expected to impart anti-glare properties to the surface of the touch panel.

作為賦予防眩性之光學片，例如提出專利文獻1。 As an optical sheet imparting anti-glare properties, for example, Patent Document 1 is proposed.

[專利文獻1]日本專利特開2013-178534號公報 [Patent Document 1] Japanese Patent Laid-Open No. 2013-178534

專利文獻1係對於屋內之照明之防眩性優異。然而，對於太 陽光之防眩性(戶外防眩性)並不足夠。 Patent Document 1 is excellent in anti-glare properties for indoor lighting. However, for too The anti-glare property of sunlight (outdoor anti-glare property) is not enough.

又，近年來之觸控面板係使如下各種操作成為可能，即不僅將手指向一方向移動，亦於觸控面板上將畫面進行擴大縮小等。若使用防眩性之等級高之光學片作為觸控面板之表面材，則有如上述之觸控面板之操作性容易降低之問題。 In addition, in recent years, touch panels have enabled various operations such as not only moving a finger in one direction, but also enlarging and reducing the screen on the touch panel. If an optical sheet with a high level of anti-glare properties is used as the surface material of the touch panel, there is a problem that the operability of the touch panel is likely to decrease as described above.

於專利文獻1中，對於兼顧戶外防眩性、與觸控面板之操作性，未做任何研究。 In Patent Document 1, no research has been done on both outdoor anti-glare properties and operability of the touch panel.

又，關於目前所市售之大畫面TV、或PC顯示器等之表面所配置之防眩膜，不僅未考慮觸控面板之操作性，亦未考慮對於太陽光之防眩性(戶外防眩性)。 In addition, regarding the anti-glare film placed on the surface of the large-screen TV or PC monitor currently on the market, not only the operability of the touch panel is not considered, but also the anti-glare property against sunlight (outdoor anti-glare property) is not considered. ).

本發明係鑒於此種實際情況而完成者，其目的在於提供一種具有戶外防眩性，可抑制解像性之降低，並且觸控面板之操作性優異之觸控面板、顯示裝置、光學片及光學片的篩選方法。 The present invention was completed in view of the actual situation, and its purpose is to provide a touch panel, display device, optical sheet, and The screening method of optical film.

為了解決上述課題，本發明係提供以下之[1]~[8]之觸控面板、顯示裝置、光學片及光學片之篩選方法。 In order to solve the above-mentioned problems, the present invention provides the following [1] to [8] touch panels, display devices, optical sheets, and screening methods of optical sheets.

[1]一種觸控面板，於操作者側之表面具有凹凸，使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對該刮針施加垂直負載100g，且同時使該刮針以10mm/秒之速度進行單程長度為10mm之往返1次，將此時作用於該刮針之靜摩擦係數設為μs₁₀；使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對該刮針施加垂直負載100g，且同時使該刮針以20mm/秒之速度進行單程長度為10mm之往返1次， 將此時作用於該刮針之靜摩擦係數設為μs₂₀時，μs₁₀及μs₂₀滿足以下之條件(A1)，且關於上述凹凸，將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra_2.5)滿足以下之條件(A2)。 [1] A touch panel having uneven surfaces on the operator side, a sapphire needle with a tip radius of 0.3 mm is vertically contacted with the unevenness, a vertical load of 100 g is applied to the squeegee needle, and the squeegee needle Perform a round trip with a length of 10 mm at a speed of 10mm/sec. Set the static friction coefficient acting on the squeegee at this time as μs ₁₀ ; make a sapphire squeegee with a tip radius of 0.3mm vertically contact the above-mentioned unevenness, A vertical load of 100g is applied to the squeegee needle, and at the same time, the squeegee needle is reciprocated once with a single pass length of 10mm at a speed of 20mm/sec. When the coefficient of static friction acting on the squeegee needle at this time is set to μs ₂₀ , μs ₁₀ And μs ₂₀ satisfies the following condition (A1), and regarding the above-mentioned unevenness, the arithmetic average roughness (Ra _2.5 ) of JIS B0601: 1994 when the cut-off value is set to 2.5 mm satisfies the following condition (A2).

0.70≦μs₂₀/μs₁₀≦1.75 (A1) 0.70≦μs ₂₀ /μs ₁₀ ≦1.75 (A1)

0.10μm≦Ra_2.5≦0.60μm (A2) 0.10μm≦Ra _2.5 ≦0.60μm (A2)

[2]一種顯示裝置，係於顯示元件之出射面側的最表面具有凹凸而成，將使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對該刮針施加垂直負載100g，且同時使該刮針以10mm/秒之速度進行單程長度為10mm之往返1次，將此時作用於該刮針之靜摩擦係數設為μs₁₀；使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對該刮針施加垂直負載100g，且同時使該刮針以20mm/秒之速度進行單程長度為10mm之往返1次，將此時作用於該刮針之靜摩擦係數設為μs₂₀時，μs₁₀及μs₂₀滿足以下之條件(A1)，關於上述凹凸將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra_2.5)滿足以下之條件(A2)。 [2] A display device in which the outermost surface of the exit surface of the display element has unevenness, a sapphire needle with a tip radius of 0.3mm is vertically contacted with the unevenness, and a vertical load of 100g is applied to the needle , And at the same time make the squeegee at a speed of 10mm/s to make a round trip with a length of 10mm in a single pass, set the static friction coefficient acting on the squeegee at this time as μs ₁₀ ; make the sapphire squeegee with a tip radius of 0.3mm In contact with the above-mentioned unevenness vertically, a vertical load of 100g is applied to the squeegee needle, and at the same time, the squeegee needle is reciprocated once with a single pass length of 10mm at a speed of 20mm/sec. Set the static friction coefficient acting on the squeegee needle at this time When it is μs ₂₀ , μs ₁₀ and μs ₂₀ satisfy the following conditions (A1). Regarding the above concavity and convexity, when the cut-off value is set to 2.5mm, the arithmetic average roughness (Ra _2.5 ) of JIS B0601: 1994 satisfies the following conditions (A2) .

0.70≦μs₂₀/μs₁₀≦1.75 (A1) 0.70≦μs ₂₀ /μs ₁₀ ≦1.75 (A1)

0.10μm≦Ra_2.5≦0.60μm (A2) 0.10μm≦Ra _2.5 ≦0.60μm (A2)

[3]一種光學片，一面具有凹凸，使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對該刮針施加垂直負載100g，且同時使該刮針以10mm/秒之速度進行單程長度為10mm之往返1次，將此時作用於該刮針之靜摩擦係數設為μs₁₀，使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對該刮針施加垂直負載100g，且同時使該刮針以20mm/秒之速度進行單程長度為10mm之往返1次，將此時作用於該刮針之靜摩擦 係數設為μs₂₀時，μs₁₀及μs₂₀滿足以下之條件(A1)，且，關於上述凹凸，將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra_2.5)滿足以下之條件(A2)。 [3] An optical sheet with unevenness on one side, a sapphire squeegee with a tip radius of 0.3mm is vertically in contact with the unevenness, a vertical load of 100g is applied to the squeegee, and the squeegee is set at a speed of 10mm/sec. Perform a round trip with a length of 10mm per pass. Set the coefficient of static friction acting on the squeegee at this time to μs ₁₀ , make a sapphire sapphire squeegee with a tip radius of 0.3mm vertically contact the above-mentioned unevenness, and apply a vertical to the squeegee Load 100g, and at the same time make the squeegee to make a round trip of 10mm at a speed of 20mm/sec. When the static friction coefficient acting on the squeegee is set to μs ₂₀ , μs ₁₀ and μs ₂₀ meet the following requirements Condition (A1), and regarding the above-mentioned unevenness, the arithmetic average roughness (Ra _2.5 ) of JIS B0601: 1994 when the cut-off value is set to 2.5 mm satisfies the following condition (A2).

0.70≦μs₂₀/μs₁₀≦1.75 (A1) 0.70≦μs ₂₀ /μs ₁₀ ≦1.75 (A1)

0.10μm≦Ra_2.5≦0.60μm (A2) 0.10μm≦Ra _2.5 ≦0.60μm (A2)

[4]一種光學片的篩選方法，其係於一面具有凹凸之光學片的篩選方法，該篩選方法選定以下光學片作為位於觸控面板之最上部的光學片，使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對該刮針施加垂直負載100g，且同時使該刮針以10mm/秒之速度進行單程長度為10mm之往返1次，將此時作用於該刮針之靜摩擦係數設為μs₁₀；使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對該刮針施加垂直負載100g，且同時使該刮針以20mm/秒之速度進行單程長度為10mm之往返1次，將此時作用於該刮針之靜摩擦係數設為μs₂₀時，μs₁₀及μs₂₀滿足以下之條件(A1)，且，關於上述凹凸，將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra_2.5)滿足以下之條件(A2)。 [4] A screening method for optical sheets, which is a screening method for optical sheets with concavities and convexities on one side. The screening method selects the following optical sheets as the optical sheets located on the uppermost part of the touch panel, with a front end radius of 0.3mm made of sapphire The squeegee needle is vertically in contact with the above-mentioned unevenness, a vertical load of 100g is applied to the squeegee needle, and at the same time, the squeegee needle is reciprocated once with a single pass length of 10mm at a speed of 10mm/sec. The coefficient of static friction is set to μs ₁₀ ; a sapphire needle with a tip radius of 0.3mm is vertically in contact with the above-mentioned unevenness, a vertical load of 100g is applied to the squeegee, and the squeegee is made to perform a single pass at a speed of 20mm/sec. The length is One round trip of 10mm, when the coefficient of static friction acting on the squeegee at this time is set to μs ₂₀ , when μs ₁₀ and μs ₂₀ meet the following condition (A1), and when the cut-off value is set to 2.5 mm for the above-mentioned unevenness The arithmetic average roughness (Ra _2.5 ) of JIS B0601: 1994 satisfies the following condition (A2).

0.70≦μs₂₀/μs₁₀≦1.75 (A1) 0.70≦μs ₂₀ /μs ₁₀ ≦1.75 (A1)

0.10μm≦Ra_2.5≦0.60μm (A2) 0.10μm≦Ra _2.5 ≦0.60μm (A2)

[5]一種觸控面板，於操作者側之表面具有凹凸，上述凹凸滿足以下之條件(B1)及(B2)。 [5] A touch panel having irregularities on the surface of the operator side, and the irregularities satisfy the following conditions (B1) and (B2).

條件(B1)：使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對上述刮針施加垂直負載Tg，且同時使該刮針以5mm/秒之速度進行單程長度為10mm之往返1次，測量此時作用於上述刮針之靜摩擦係數 μs及動摩擦係數μk。於以上述靜摩擦係數μs與上述動摩擦係數μk之比(μs/μk)為縱軸，以上述垂直負載Tg為橫軸繪製而成之圖中，將位於垂直負載100~1000g之範圍的曲線藉由最小平方法以一次直線近似時，上述一次直線之斜率為負。 Condition (B1): A sapphire squeegee with a tip radius of 0.3mm is vertically in contact with the above-mentioned unevenness, a vertical load Tg is applied to the above-mentioned squeegee, and at the same time, the squeegee is made to perform a single pass length of 10mm at a speed of 5mm/sec. Go back and forth once, measure the coefficient of static friction acting on the above-mentioned scraping needle at this time μs and coefficient of dynamic friction μk. In the graph drawn with the ratio of the static friction coefficient μs to the dynamic friction coefficient μk (μs/μk) as the vertical axis and the vertical load Tg as the horizontal axis, the curve in the range of the vertical load 100~1000g is used as When the least square method is approximated by a straight line, the slope of the above straight line is negative.

條件(B2)：關於上述凹凸，將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra2.5)為0.10μm以上0.60μm以下。 Condition (B2): Regarding the above-mentioned unevenness, the arithmetic mean roughness (Ra2.5) of JIS B0601: 1994 when the cut-off value is 2.5 mm is 0.10 μm or more and 0.60 μm or less.

[6]一種顯示裝置，於顯示元件之出射面側的最表面具有凹凸，上述凹凸滿足以下之條件(B1)及(B2)。 [6] A display device having unevenness on the outermost surface on the exit surface side of the display element, and the unevenness satisfies the following conditions (B1) and (B2).

條件(B1)：使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對上述刮針施加垂直負載Tg，，且同時使該刮針以5mm/秒之速度進行單程長度為10mm之往返1次，測量此時作用於上述刮針之靜摩擦係數μs及動摩擦係數μk。於以上述靜摩擦係數μs與上述動摩擦係數μk之比(μs/μk)為縱軸，上述垂直負載Tg為橫軸繪製而成之圖中，將位於垂直負載100~1000g之範圍的曲線藉由最小平方法以一次直線近似時，上述一次直線之斜率為負。 Condition (B1): A sapphire squeegee with a tip radius of 0.3mm is vertically in contact with the unevenness, a vertical load Tg is applied to the squeegee, and the squeegee is made to perform a single pass at a speed of 5mm/sec. The length is 10mm Measure the static friction coefficient μs and the dynamic friction coefficient μk acting on the above-mentioned scraping needle at this time. In the graph drawn with the ratio of the static friction coefficient μs to the dynamic friction coefficient μk (μs/μk) on the vertical axis and the vertical load Tg on the horizontal axis, the curve in the range of the vertical load 100~1000g is drawn by the maximum When the Xiaoping method is approximated by a straight line, the slope of the above straight line is negative.

條件(B2)：關於上述凹凸，將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra2.5)為0.10μm以上0.60μm以下。 Condition (B2): Regarding the above-mentioned unevenness, the arithmetic mean roughness (Ra2.5) of JIS B0601: 1994 when the cut-off value is 2.5 mm is 0.10 μm or more and 0.60 μm or less.

[7]一種光學片，於一面具有凹凸，上述凹凸滿足以下之條件(B1)及(B2)。 [7] An optical sheet having irregularities on one surface, and the irregularities satisfy the following conditions (B1) and (B2).

條件(B1)：使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對上述刮針施加垂直負載Tg，且同時使該刮針以5mm/秒之速度進行單程長度為10mm之往返1次，測量此時作用於上述刮針之靜摩擦係數 μs及動摩擦係數μk。於將上述靜摩擦係數μs與上述動摩擦係數μk之比(μs/μk)設為縱軸，將上述垂直負載Tg設為橫軸繪製而成之圖中，將位於垂直負載100~1000g之範圍的曲線藉由最小平方法以一次直線近似時，上述一次直線之斜率為負。 Condition (B1): A sapphire squeegee with a tip radius of 0.3mm is vertically in contact with the above-mentioned unevenness, a vertical load Tg is applied to the above-mentioned squeegee, and at the same time, the squeegee is made to perform a single pass length of 10mm at a speed of 5mm/sec. Go back and forth once, measure the coefficient of static friction acting on the above-mentioned scraping needle at this time μs and coefficient of dynamic friction μk. In the graph drawn with the ratio of the static friction coefficient μs to the dynamic friction coefficient μk (μs/μk) on the vertical axis and the vertical load Tg on the horizontal axis, the curve in the range of the vertical load 100~1000g When approximating with a straight line by the least square method, the slope of the above straight line is negative.

條件(B2)：關於上述凹凸，將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra2.5)為0.10μm以上0.60μm以下。 Condition (B2): Regarding the above-mentioned unevenness, the arithmetic mean roughness (Ra2.5) of JIS B0601: 1994 when the cut-off value is 2.5 mm is 0.10 μm or more and 0.60 μm or less.

[8]一種光學片之篩選方法，其選定一面具有凹凸，上述凹凸滿足以下之條件(B1)及(B2)的光學片作為位於觸控面板之最上部的光學片。 [8] A method for screening optical sheets, which selects an optical sheet with unevenness on one side, and the above-mentioned unevenness satisfies the following conditions (B1) and (B2) as an optical sheet located on the uppermost part of the touch panel.

條件(B1)：使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對上述刮針施加垂直負載Tg，且同時使該刮針以5mm/秒之速度進行單程長度為10mm之往返1次，測量此時作用於上述刮針之靜摩擦係數μs及動摩擦係數μk。於以上述靜摩擦係數μs與上述動摩擦係數μk之比(μs/μk)為縱軸，以上述垂直負載Tg為橫軸繪製而成之圖中，將位於垂直負載100~1000g之範圍的曲線藉由最小平方法以一次直線近似時，上述一次直線之斜率為負。 Condition (B1): A sapphire squeegee with a tip radius of 0.3mm is vertically in contact with the above-mentioned unevenness, a vertical load Tg is applied to the above-mentioned squeegee, and at the same time, the squeegee is made to perform a single pass length of 10mm at a speed of 5mm/sec. Go back and forth once, and measure the coefficient of static friction μs and the coefficient of dynamic friction μk acting on the above-mentioned scraper at this time. In the graph drawn with the ratio of the static friction coefficient μs to the dynamic friction coefficient μk (μs/μk) as the vertical axis and the vertical load Tg as the horizontal axis, the curve in the range of the vertical load 100~1000g is used as When the least square method is approximated by a straight line, the slope of the above straight line is negative.

條件(B2)：關於上述凹凸，將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra2.5)為0.10μm以上0.60μm以下。 Condition (B2): Regarding the above-mentioned unevenness, the arithmetic mean roughness (Ra2.5) of JIS B0601: 1994 when the cut-off value is 2.5 mm is 0.10 μm or more and 0.60 μm or less.

根據本發明，可提供一種具有戶外防眩性，可抑制解像性之降低，並且觸控面板之操作性優異之觸控面板、顯示裝置、光學片及光學片的篩選方法。 According to the present invention, it is possible to provide a touch panel, a display device, an optical sheet, and a screening method of an optical sheet that have outdoor anti-glare properties, can suppress the decrease in resolution, and have excellent operability of the touch panel.

1‧‧‧電阻膜式觸控面板 1‧‧‧Resistive film touch panel

11‧‧‧透明基板 11‧‧‧Transparent substrate

12‧‧‧透明導電膜 12‧‧‧Transparent conductive film

13‧‧‧間隔件 13‧‧‧Spacer

2‧‧‧靜電電容式觸控面板 2‧‧‧Electrostatic capacitive touch panel

21‧‧‧透明基板 21‧‧‧Transparent substrate

22‧‧‧透明導電膜(X軸電極) 22‧‧‧Transparent conductive film (X-axis electrode)

23‧‧‧透明導電膜(Y軸電極) 23‧‧‧Transparent conductive film (Y-axis electrode)

24‧‧‧接著劑層 24‧‧‧Adhesive layer

圖1係表示本發明之電阻膜式觸控面板之一實施形態之剖面圖。 FIG. 1 is a cross-sectional view showing an embodiment of the resistive film type touch panel of the present invention.

圖2係表示本發明之靜電電容式觸控面板之一實施形態之剖面圖。 Fig. 2 is a cross-sectional view showing an embodiment of the capacitive touch panel of the present invention.

圖3係對平均傾斜角θa之算出方法進行說明之圖。 Fig. 3 is a diagram for explaining the calculation method of the average inclination angle θa.

圖4係表示對於本發明之光學片之凹凸，將靜摩擦係數μs與動摩擦係數μk之比(μs/μk)設為縱軸，將垂直負載Tg設為橫軸而進行繪圖時，自處於垂直負載100~1000g之範圍的曲線藉由最小平方法所獲得之近似一次直線的一例之圖表。 Figure 4 shows the unevenness of the optical sheet of the present invention, when the ratio of static friction coefficient μs to dynamic friction coefficient μk (μs/μk) is set on the vertical axis, and the vertical load Tg is set on the horizontal axis. The curve in the range of 100~1000g is a graph that approximates a straight line obtained by the least square method.

以下，關於本發明之觸控面板、顯示裝置、光學片及光學片的篩選方法，取實施形態A及實施形態B為例以進行說明。 Hereinafter, regarding the touch panel, the display device, the optical sheet, and the screening method of the optical sheet of the present invention, the embodiment A and the embodiment B are taken as examples for description.

<實施形態A> <Embodiment A>

[觸控面板] [Touch Panel]

實施形態A之觸控面板係於操作者側之表面具有凹凸者，使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對該刮針施加垂直負載100g，且同時使該刮針以10mm/秒之速度進行單程長度為10mm之往返1次，將此時作用於該刮針之靜摩擦係數設為μs₁₀，使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對該刮針施加垂直負載100g，且同時以20mm/秒之速度進行單程長度為10mm之往返1次，將此時作用於該刮針之靜摩擦係數設為μs₂₀時，μs₁₀及μs₂₀滿足以下 之條件(A1)，且關於上述凹凸，將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra_2.5)滿足以下之條件(A2)。 The touch panel of Embodiment A is one with uneven surfaces on the operator side. A sapphire needle with a tip radius of 0.3 mm is placed in vertical contact with the unevenness, a vertical load of 100 g is applied to the needle, and the scratch The needle makes one round trip with a length of 10mm at a speed of 10mm/sec. At this time, the static friction coefficient acting on the squeegee is set to μs ₁₀ , and the sapphire squeegee with a tip radius of 0.3mm is vertically in contact with the above-mentioned unevenness. , Apply a vertical load of 100g to the squeegee needle, and at the same time perform a round trip with a length of 10mm at a speed of 20mm/sec. At this time, when the _{coefficient of static friction acting on the squeegee needle is set to μs 20 , μs 10} and μs _{20 The following condition (A1) is satisfied, and the arithmetic average roughness (Ra 2.5} ) of JIS B0601: 1994 when the cut-off value is set to 2.5 mm for the above-mentioned unevenness meets the following condition (A2).

0.70≦μs₂₀/μs₁₀≦1.75 (A1) 0.70≦μs ₂₀ /μs ₁₀ ≦1.75 (A1)

0.10μm≦Ra_2.5≦0.60μm (A2) 0.10μm≦Ra _2.5 ≦0.60μm (A2)

實施形態A中，所謂「操作者側之表面」，係指操作者操作觸控面板時，實際接觸並操作之面。 In Embodiment A, the "surface on the operator's side" refers to the surface that the operator actually touches and operates when operating the touch panel.

作為觸控面板，可列舉：靜電電容式觸控面板、電阻膜式觸控面板、光學式觸控面板、超音波式觸控面板及電磁感應式觸控面板等。 Examples of touch panels include electrostatic capacitive touch panels, resistive film touch panels, optical touch panels, ultrasonic touch panels, electromagnetic induction touch panels, and the like.

該等觸控面板具有玻璃基材、塑膠膜基材等透明基材，且存在於該透明基材上形成有用以賦予防眩性之凹凸的情形。實施形態A之觸控面板係例如於最上部具有下述之光學片作為此種於透明基材上具有凹凸之構件者。 These touch panels have transparent substrates such as glass substrates and plastic film substrates, and there are cases where concavities and convexities useful for imparting anti-glare properties are formed on the transparent substrate. The touch panel of Embodiment A has, for example, the following optical sheet on the uppermost part as such a member having irregularities on a transparent substrate.

電阻膜式觸控面板1如圖1所示，係未圖示之電路連接於以使具有導電膜12之上下一對透明基板11之導電膜12彼此對向之方式隔著間隔件13配置而成的基本構成而成。於電阻膜式觸控面板之情形時，於實施形態A中，使用下述之光學片作為上部透明基板。藉由如上所述使用下述之光學片作為電阻膜式觸控面板之上部透明基板，可利用光學片之凹凸形狀而對觸控面板賦予戶外防眩性，並且使觸控面板之操作性變得優異。又，可抑制解像性之降低。 The resistive film type touch panel 1 is shown in FIG. 1, and a circuit not shown is connected to the conductive film 12 having the next pair of transparent substrates 11 on the conductive film 12 and arranged with spacers 13 in between. Into the basic composition. In the case of a resistive film type touch panel, in Embodiment A, the following optical sheet is used as the upper transparent substrate. By using the following optical sheet as the upper transparent substrate of the resistive film type touch panel as described above, the concave-convex shape of the optical sheet can be used to impart outdoor anti-glare properties to the touch panel and change the operability of the touch panel. It's excellent. In addition, the reduction in resolution can be suppressed.

再者，上述光學片除了用作上部透明基板，亦可用作下部透明基板。 Furthermore, the above-mentioned optical sheet can also be used as a lower transparent substrate in addition to being used as an upper transparent substrate.

靜電電容式觸控面板可列舉表面型及投影型等，多使用投影 型。投影型之靜電電容式觸控面板係將電路連接於將X軸電極、及與該X軸電極正交之Y軸電極隔著絕緣體配置而成的基本構成而成者。若更具體地說明該基本構成，則可舉：於1片透明基板上之不同面形成X軸電極及Y軸電極之態樣；於1片透明基板上依序形成X軸電極、絕緣體層、Y軸電極之態樣；如圖2所示，於1片透明基板21上形成X軸電極22，於另一透明基板21上形成Y軸電極23，經由接著劑層24等進行積層之態樣等。又，可舉於該等基本態樣中進而積層另一透明基板之態樣。 Capacitive touch panels include surface type and projection type, and more projections are used type. The projection type electrostatic capacitive touch panel is a basic structure in which an X-axis electrode and a Y-axis electrode orthogonal to the X-axis electrode are arranged with an insulator interposed between a circuit and a circuit. To describe the basic structure more specifically, it can be mentioned that the X-axis electrode and the Y-axis electrode are formed on different sides of a transparent substrate; the X-axis electrode, the insulator layer, and the The state of the Y-axis electrode; as shown in FIG. 2, the X-axis electrode 22 is formed on one transparent substrate 21, the Y-axis electrode 23 is formed on the other transparent substrate 21, and the layer is laminated through the adhesive layer 24, etc. Wait. In addition, another transparent substrate may be laminated among the basic patterns.

於靜電電容式觸控面板之情形時，於實施形態A中，使用下述之光學片作為最上部之透明基板。藉由如上所述將下述之光學片用於靜電電容式觸控面板之最上部的透明基板，可利用光學片之凹凸形狀而對觸控面板賦予戶外防眩性，並且使觸控面板之操作性變得優異。又，可抑制解像性之降低。 In the case of an electrostatic capacitive touch panel, in Embodiment A, the following optical sheet is used as the uppermost transparent substrate. By using the following optical sheet as the uppermost transparent substrate of an electrostatic capacitive touch panel as described above, the concave-convex shape of the optical sheet can be used to impart outdoor anti-glare properties to the touch panel and make the touch panel more effective. The operability becomes excellent. In addition, the reduction in resolution can be suppressed.

如上所述之觸控面板例如用作設置於顯示元件上之表嵌式型觸控面板。 The touch panel as described above is used, for example, as an in-cell type touch panel arranged on a display element.

(光學片) (Optical Sheet)

實施形態A之光學片係一面具有凹凸，該凹凸滿足上述條件(A1)及(A2)者。 The optical sheet of the embodiment A has unevenness on one surface, and the unevenness satisfies the above-mentioned conditions (A1) and (A2).

觸控面板有要求不同操作速度之情況。於條件(A1)中，若μs₂₀/μs₁₀未達0.70，則無法獲得畫面滾動之操作感，及/或無法順利地進行擴大/縮小操作。若超過1.75，則無法順利地進行滾動操作，及/或無法獲得擴大/縮小之操作感。 The touch panel may require different operating speeds. In condition (A1), if μs ₂₀ /μs _{10 is} less than 0.70, the screen scrolling operation feeling cannot be obtained, and/or the enlargement/reduction operation cannot be smoothly performed. If it exceeds 1.75, the scroll operation cannot be smoothly performed, and/or the operation feeling of zooming in/out cannot be obtained.

相對於此，於實施形態A之光學片滿足條件(A1)之情形時，於觸控 面板之任何操作時，均可使操作開始時手指之卡頓程度為相同程度，而可提高操作性。 In contrast, when the optical sheet of Embodiment A satisfies the condition (A1), when the touch During any operation of the panel, the degree of finger jam at the beginning of the operation can be made to the same degree, and the operability can be improved.

條件(A1)較佳滿足0.80≦μs₂₀/μs₁₀≦1.60，更佳滿足0.85≦μs₂₀/μs₁₀≦1.25，進而較佳滿足0.85≦μs₂₀/μs₁₀≦1.15。 The condition (A1) preferably satisfies 0.80≦μs ₂₀ /μs ₁₀ ≦1.60, more preferably satisfies 0.85≦μs ₂₀ /μs ₁₀ ≦1.25, and more preferably satisfies 0.85≦μs ₂₀ /μs ₁₀ ≦1.15.

再者，於實施形態A中，靜摩擦係數係設為自摩擦力0開始伴隨著測量時間之經過，成為動摩擦係數以上之最初摩擦力的峰值。 Furthermore, in the embodiment A, the static friction coefficient is set to be the peak value of the initial friction force above the dynamic friction coefficient with the elapse of the measurement time from the friction force 0.

又，就提高操作性之觀點而言，μs₂₀及μs₁₀較佳為以下之範圍。μs₂₀較佳為0.10~0.26，更佳為0.11~0.25，進而較佳為0.12~0.24。μs₁₀較佳為0.12~0.18，更佳為0.13~0.17，進而較佳為0.14~0.16。 In addition, from the viewpoint of improving operability, μs ₂₀ and μs _{10 are} preferably in the following ranges. μs _{20 is} preferably 0.10 to 0.26, more preferably 0.11 to 0.25, and still more preferably 0.12 to 0.24. μs _{10 is} preferably 0.12 to 0.18, more preferably 0.13 to 0.17, and still more preferably 0.14 to 0.16.

又，於條件(A2)中，將截止值設為2.5mm。截止值係表示從由粗糙度成分(高頻成分)與波紋度成分(低頻成分)構成之剖面曲線將波紋度成分截斷之程度的值。換言之，截止值係表示自剖面曲線將波紋度成分(低頻成分)截斷之濾波器之細度的值。若截止值大，則濾波器較疏，因此波紋度成分中之大波紋會被截斷，但小波紋不會被截斷。另一方面，若截止值小，則濾波器較密，因此波紋度成分基本上會被截斷。於JIS B0601中所參照之JIS B0633中，在算術平均粗糙度Ra0.1~2μm時，將截止值(基準長度)設為0.8mm。因此，根據JIS B0633，於上述條件(A2)之Ra之情形時，標準為將截止值(基準長度)設為0.8mm。 In addition, in the condition (A2), the cut-off value is 2.5 mm. The cut-off value is a value indicating the degree to which the waviness component is cut off from the profile curve composed of the roughness component (high-frequency component) and the waviness component (low-frequency component). In other words, the cutoff value represents the fineness of the filter that cuts the waviness component (low frequency component) from the profile curve. If the cutoff value is large, the filter is sparse, so the large ripples in the waviness component will be cut off, but the small ripples will not be cut off. On the other hand, if the cutoff value is small, the filter is denser, so the waviness component is basically cut off. In JIS B0633 referred to in JIS B0601, when the arithmetic average roughness Ra is 0.1 to 2 μm, the cut-off value (reference length) is set to 0.8 mm. Therefore, according to JIS B0633, in the case of Ra in the above condition (A2), the standard is to set the cut-off value (reference length) to 0.8 mm.

然而，關於操作時之觸感、戶外防眩性及解像性，不僅受粗糙度成分(高頻成分)影響，亦會受波紋度成分(低頻成分)影響，因此於將截止值(基準長度)設為0.8mm之情形時，有粗糙度曲線之波紋度成分(低頻成分)被截斷之程度變大，無法評價與戶外防眩性及解像性相比更容易受 低頻成分之影響之操作時之觸感之虞。因此，於實施形態A中，將條件(A2)之截止值設為2.5mm。 However, the touch, outdoor anti-glare properties and resolution during operation are not only affected by roughness components (high frequency components), but also by waviness components (low frequency components). Therefore, the cutoff value (reference length ) Is set to 0.8mm, the degree of the waviness component (low frequency component) of the roughness curve is cut off, and it cannot be evaluated that it is more easily affected than outdoor anti-glare and resolution. The impact of low-frequency components may cause tactile operation during operation. Therefore, in the embodiment A, the cut-off value of the condition (A2) is set to 2.5 mm.

條件(A2)之算術平均粗糙度Ra_2.5為0.10μm以上0.60μm以下。若Ra_2.5未達0.10μm，則光散射不足而防眩性降低。又，手指與光學片表面之接觸面積增加而觸感(滑動感)變差。若Ra_2.5超過0.60μm，則會損害操作時之滑動性，又，對比度及解像性降低。就操作時之觸感、戶外防眩性、及解像性之觀點而言，條件(A2)較佳滿足0.15μm≦Ra_2.5≦0.60μm，更佳滿足0.25μm≦Ra_2.5≦0.55μm。 The arithmetic average roughness Ra _2.5 of the condition (A2) is 0.10 μm or more and 0.60 μm or less. If Ra _{2.5 is} less than 0.10 μm, light scattering is insufficient and anti-glare properties are reduced. In addition, the contact area between the finger and the surface of the optical sheet increases and the tactile feel (slidability) deteriorates. If Ra _2.5 exceeds 0.60 μm, sliding properties during operation will be impaired, and contrast and resolution will decrease. From the viewpoints of touch during operation, outdoor anti-glare properties, and resolution, condition (A2) preferably satisfies 0.15 μm≦Ra _2.5 ≦0.60 μm, and more preferably satisfies 0.25 μm≦Ra _2.5 ≦0.55 μm.

又，若算術平均粗糙度Ra_2.5為0.10μm以上，則可使透明基材之延遲值所特有之漸變色之色不均難以引人注目。所謂延遲值所特有之漸變色之色不均，係透過具有延遲值之透明基材之光所產生之彩虹紋的色不均，此種色不均係例如於經由偏光太陽眼鏡辨認透過偏光板、具有特定延遲值之透明基材之光時被觀察到。 In addition, if the arithmetic average roughness Ra _2.5 is 0.10 μm or more, the color unevenness of the gradation peculiar to the retardation value of the transparent substrate can be made less noticeable. The so-called color unevenness of the gradual color peculiar to the retardation value is the color unevenness of the rainbow pattern produced by the light passing through the transparent substrate with the retardation value. Such color unevenness is recognized through the polarizing plate through polarized sunglasses, for example. , It is observed when the light of a transparent substrate with a specific retardation value.

再者，藉由除上述條件(A2)外，亦滿足下述之條件(A3)~(A5)，可變得更容易滿足上述之條件(A1)。尤其是於Ra_2.5為0.25μm以上之情形時，對於例如色域廣之顯示元件，可使漸變色之色不均更為難以引人注目。 Furthermore, by satisfying the following conditions (A3) to (A5) in addition to the above condition (A2), it becomes easier to satisfy the above condition (A1). Especially when Ra _2.5 is 0.25 μm or more, for display elements with a wide color gamut, for example, the color unevenness of the gradation color can be made more difficult to notice.

又，上述凹凸較佳為將截止值設為2.5mm時之JIS B0601：1994的十點平均粗糙度(Rz_2.5)與上述之Ra_2.5滿足以下之條件(A3)。 Moreover, it is preferable that the above-mentioned irregularities satisfy the following condition (A3) _{with the ten-point average roughness (Rz 2.5} ) of JIS B0601:1994 and the above-mentioned Ra _{2.5 when the cut-off value is set to 2.5 mm.}

5.7≦Rz_2.5/Ra_2.5 (A3) 5.7≦Rz _2.5 /Ra _2.5 (A3)

所謂算術平均粗糙度Ra，係將評價長度之粗糙度曲線之峰與谷之各標高的絕對值進行積分並除以評價長度，以均等之標高之形式所求出之值。另一方面，所謂十點平均粗糙度Rz，係於將與截止值相等之取 樣長度之N倍之評價長度的粗糙度曲線進行N等分，求出每個區間高度第1位至第5位之峰頂之平均標高與深度第1位至第5位之谷底之平均標高的間隔Rz'時之N個Rz'的算術平均值。即，Ra係粗糙度曲線整體之標高之平均值，相對於此，Rz係著重於粗糙度曲線中較高之5處與較低之5處時之標高的平均值。因此，於粗糙度曲線不具有無規性之情形時，Ra與Rz大致相同，但於粗糙度曲線具有無規性之情形時，與Ra相比，Rz變大。因此，Rz/Ra成為表示粗糙度曲線之無規性之指標。 The so-called arithmetic average roughness Ra is the value obtained by integrating the absolute values of the elevations of the peaks and valleys of the roughness curve of the evaluation length and dividing by the evaluation length, in the form of an equal elevation. On the other hand, the so-called ten-point average roughness Rz is to take the value equal to the cutoff value. The roughness curve of the evaluation length that is N times the sample length is divided into N equal parts, and the average elevation of the peak top from the first to the fifth place in each interval height and the average elevation of the valley bottom from the first to the fifth place in the depth are calculated. The arithmetic average of N Rz's at the interval Rz'. That is, Ra is the average value of the elevation of the entire roughness curve, while Rz is the average value of the elevations at the 5 higher and 5 lower points in the roughness curve. Therefore, when the roughness curve does not have randomness, Ra and Rz are approximately the same, but when the roughness curve has randomness, Rz becomes larger than Ra. Therefore, Rz/Ra becomes an index indicating the randomness of the roughness curve.

若Rz_2.5/Ra_2.5為5.7以上，則粗糙度曲線之無規性提高，手指與光學片表面之接觸面積減少，而觸感變得良好。又，藉由提高粗糙度曲線之無規性，而有對於色域廣之顯示元件，可使漸變色之色不均更為難以引人注目之傾向。再者，就觸感(滑動感)及解像性之觀點而言，粗糙度較佳為不使無規性過度。 If Rz _2.5 /Ra _2.5 is 5.7 or more, the randomness of the roughness curve is improved, the contact area between the finger and the surface of the optical sheet is reduced, and the tactility becomes better. In addition, by increasing the randomness of the roughness curve, there is a tendency that for display elements with a wide color gamut, the color unevenness of the gradual color can be made more difficult to notice. Furthermore, from the viewpoint of tactile feel (slidability) and resolution, the roughness is preferably such that the randomness is not excessive.

條件(A3)更佳滿足6.0≦Rz_2.5/Ra_2.5≦10.0，進而較佳滿足6.5≦Rz_2.5/Ra_2.5≦9.5，進而更佳滿足7.0≦Rz_2.5/Ra_2.5≦9.0。 The condition (A3) is more preferably 6.0≦Rz _2.5 /Ra _2.5 ≦10.0, more preferably 6.5≦Rz _2.5 /Ra _2.5 ≦9.5, and still more preferably 7.0≦Rz _2.5 /Ra _2.5 ≦9.0.

再者，上述凹凸之Rz_2.5較佳為0.50~4.30μm，更佳為1.00~4.00μm，進而較佳為2.00~4.00μm。若Rz_2.5為0.50μm以上，則可對觸控面板賦予戶外防眩性，又，可使觸感(滑動感)變得更良好。若Rz_2.5為4.30μm以下，則可抑制炫光之產生，又，不會損害操作時之滑動性。 _{Furthermore, the Rz 2.5 of the} aforementioned concavities and convexities is preferably 0.50 to 4.30 μm, more preferably 1.00 to 4.00 μm, and still more preferably 2.00 to 4.00 μm. If Rz _2.5 is 0.50 μm or more, outdoor anti-glare properties can be imparted to the touch panel, and the touch (slidability) can be improved. If Rz _2.5 is 4.30μm or less, the generation of glare can be suppressed, and the sliding property during operation will not be impaired.

再者，若Rz_2.5為2.00μm以上，則對於例如色域廣之顯示元件，可使透明基材之延遲值所特有之漸變色之色不均更為難以引人注目。 Furthermore, if Rz _2.5 is 2.00 μm or more, for example, for a display element with a wide color gamut, the color unevenness of the gradation peculiar to the retardation value of the transparent substrate can be made more difficult to notice.

又，關於上述凹凸，較佳將截止值設為2.5mm時之JIS B0601：1994之局部峰頂平均間隔(S_2.5)滿足以下之條件(A4)。 In addition, with regard to the above-mentioned unevenness, it is preferable that the average interval between local peak tops (S _2.5 ) of JIS B0601: 1994 when the cut-off value is set to 2.5 mm satisfies the following condition (A4).

S_2.5≦70μm (A4) S _2.5 ≦70μm (A4)

若局部峰頂平均間隔(S_2.5)為70μm以下，則手指與光學片表面之接觸面積減少，而可使觸感(滑動感)變得良好。 If the average distance between local peak tops (S _2.5 ) is 70 μm or less, the contact area between the finger and the surface of the optical sheet is reduced, and the touch (slidability) can be improved.

條件(A4)更佳滿足S_2.5≦65μm，進而較佳滿足20μm≦S_2.5≦60μm，進而更佳滿足30μm≦S_2.5≦55μm。 The condition (A4) preferably satisfies S _2.5 ≦65 μm, more preferably satisfies 20 μm≦S _2.5 ≦60 μm, and more preferably satisfies 30 μm≦S _2.5 ≦55 μm.

進而，關於上述凹凸，較佳將截止值設為0.8mm時之JIS B0601：1994的十點平均粗糙度(Rz_0.8)、與上述之Rz_2.5滿足以下之條件(A5)。 Furthermore, with regard to the aforementioned concavities and convexities, it is preferable that the ten-point average roughness (Rz _0.8 ) of JIS B0601: 1994 and the aforementioned Rz _2.5 satisfy the following condition (A5) when the cutoff value is 0.8 mm.

0.10μm≦Rz_2.5-Rz_0.8≦1.20μm (A5) 0.10μm≦Rz _{2.5 -Rz 0.8} ≦1.20μm (A5)

如上所述，截止值係表示自由粗糙度成分(高頻成分)與波紋度成分(低頻成分)構成之截面剖面曲線截止將波紋度成分截斷之程度的值。因此，Rz_2.5-Rz_0.8可謂波紋度成分對Rz造成之影響之程度的指標。 As described above, the cut-off value is a value indicating the degree to which the cross-sectional profile formed by the free roughness component (high-frequency component) and the waviness component (low-frequency component) cuts off the waviness component. Therefore, Rz _{2.5- Rz 0.8} can be said to be an indicator of the degree of influence of the waviness component on Rz.

於滿足條件(A5)之情形時，可於以低速接觸凹凸之情形、與以高速接觸凹凸之情形時容易地使靜摩擦係數為相同程度。觸控面板之操作主要可大致分為：使畫面滾動之操作、與使顯示擴大或縮小之操作。於前者之操作與後者之操作時，前者之操作有移動手指之速度快之傾向。並且，根據移動手指之速度，對於波紋度成分之手指之卡頓容易性不同。即，於滿足條件(A5)之情形時，於觸控面板之任何操作時，均可容易地使操作開始時手指之卡頓程度(靜摩擦係數)為相同程度。又，可藉由將Rz_2.5-Rz_0.8設為上述範圍內，而容易地抑制炫光。 When the condition (A5) is satisfied, the static friction coefficient can be easily made the same level when the unevenness is contacted at a low speed and when the unevenness is contacted at a high speed. The operation of the touch panel can be roughly divided into: the operation of scrolling the screen, and the operation of expanding or shrinking the display. In the former operation and the latter operation, the former operation tends to move the finger faster. In addition, according to the speed of moving the finger, the easiness of the finger stoppage of the waviness component is different. That is, when the condition (A5) is satisfied, any operation of the touch panel can easily make the degree of finger jam (the coefficient of static friction) at the beginning of the operation the same degree. In addition, by setting Rz _{2.5- Rz 0.8} within the above range, glare can be easily suppressed.

條件(A5)更佳滿足15μm≦Rz_2.5-Rz_0.8≦0.80μm，進而較佳滿足0.20μm≦Rz_2.5-Rz_0.8≦0.50μm。 The condition (A5) preferably satisfies 15 μm≦Rz _2.5 -Rz _0.8 ≦0.80 μm, and more preferably satisfies 0.20 μm≦Rz _2.5 -Rz _0.8 ≦0.50 μm.

再者，就使透明基材之延遲值所特有之漸變色的色不均難以引人注目 之觀點而言，Rz_2.5-Rz_0.8較佳超過0.50μm，更佳超過0.80μm。 Furthermore, from the viewpoint of making it difficult to notice the color unevenness of the gradation color peculiar to the retardation value of the transparent substrate, Rz _{2.5- Rz 0.8} preferably exceeds 0.50 μm, and more preferably exceeds 0.80 μm.

就於觸控面板之任何操作時，均容易使操作開始時手指之卡頓程度(靜摩擦係數)為相同程度的觀點而言，上述凹凸較佳為Rz_2.5/Rz_0.8滿足以下之條件。 In terms of any operation of the touch panel, it is easy to make the degree of finger jam (static friction coefficient) at the same level at the beginning of the operation, the above-mentioned unevenness is preferably Rz _2.5 /Rz _{0.8 to} satisfy the following conditions.

Rz_2.5/Rz_0.8≦1.50 Rz _2.5 /Rz _0.8 ≦1.50

進而，就抑制炫光之觀點、及使透明基材之延遲值所特有之漸變色的色不均難以引人注目之觀點而言，Rz_2.5/Rz_0.8更佳為1.20以上且1.50以下，進而較佳為1.25以上且1.35以下。 Furthermore, from the viewpoint of suppressing glare and the viewpoint of making the color unevenness of the gradation color peculiar to the retardation value of the transparent substrate less conspicuous, Rz _2.5 /Rz _0.8 is more preferably 1.20 or more and 1.50 or less, and further Preferably it is 1.25 or more and 1.35 or less.

進而，關於上述凹凸，較佳將截止值設為2.5mm時之JIS B0601：1994的最大高度(Ry_2.5)滿足以下之條件。 Furthermore, regarding the above-mentioned unevenness, it is preferable that the maximum height (Ry _2.5 ) of JIS B0601:1994 when the cut-off value is set to 2.5 mm satisfies the following conditions.

0.60μm≦Ry_2.5≦5.0μm 0.60μm≦Ry _2.5 ≦5.0μm

若Ry_2.5為5.0μm以下，則可防止操作時手指之卡頓，而使觸感變得更為良好。又，可更為防止炫光之產生。若Ry_2.5為0.60μm以上，則可賦予戶外防眩性。 If Ry _2.5 is 5.0μm or less, it can prevent finger jam during operation and make the touch feel better. In addition, the generation of glare can be prevented more. If Ry _2.5 is 0.60 μm or more, outdoor anti-glare properties can be imparted.

又，就容易滿足下述之條件(A6)及(A7)之觀點而言，Ry_2.5更佳為1.0μm以上且4.7μm以下，進而較佳為1.2μm以上且4.5μm以下。 Moreover, from the viewpoint of easily satisfying the following conditions (A6) and (A7), Ry _2.5 is more preferably 1.0 μm or more and 4.7 μm or less, and still more preferably 1.2 μm or more and 4.5 μm or less.

進而，上述凹凸較佳為上述(Ry_2.5)與上述之Rz_2.5滿足以下之條件(A6)。 Furthermore, it is preferable that the above-mentioned unevenness is such that the above-mentioned (Ry _2.5 ) and the above-mentioned Rz _2.5 satisfy the following condition (A6).

Ry_2.5/Rz_2.5≦1.5 (A6) Ry _2.5 /Rz _2.5 ≦1.5 (A6)

若Ry_2.5/Rz_2.5為1.5以下，則可防止操作時手指之卡頓，而使觸感變得更為良好。又，可更加防止炫光之產生，而可容易賦予戶外防眩性。 If Ry _2.5 /Rz _2.5 is 1.5 or less, it can prevent finger jam during operation and make the touch feel better. In addition, the generation of glare can be prevented more, and outdoor anti-glare properties can be easily imparted.

Ry_2.5/Rz_2.5更佳為1.10以上且1.40以下，進而較佳為1.18以上且1.38 以下。 Ry _2.5 /Rz _2.5 is more preferably 1.10 or more and 1.40 or less, and still more preferably 1.18 or more and 1.38 or less.

進而，關於上述凹凸，較佳將截止值設為2.5mm時之凹凸的平均傾斜角(θa_2.5)滿足以下之條件。 Furthermore, with regard to the aforementioned concavities and convexities, it is preferable that the average inclination angle (θa _2.5 ) of the concavities and convexities when the cut-off value is set to 2.5 mm satisfies the following conditions.

1.0°≦θa_2.5≦5.5° 1.0°≦θa _2.5 ≦5.5°

若θa_2.5為1.0°以上，則可對觸控面板賦予戶外防眩性，又，可使操作時之觸感(滑動感)變得更為良好。若θa_2.5為5.5°以下，則可抑制對比度之降低，而謀求兼顧戶外防眩性與對比度。θa_2.5更佳滿足1.3°≦θa_2.5≦4.5°，進而較佳滿足2.0°≦θa_2.5≦4.0°。又，若θa_2.5為1.3°以上，則可使透明基材之延遲值所特有之漸變色之色不均難以引人注目。進而，若為2.0°以上，則對於例如色域廣之顯示元件，可使漸變色之色不均更為難以引人注目。 If θa _2.5 is 1.0° or more, outdoor anti-glare properties can be imparted to the touch panel, and the touch (slidability) during operation can be improved. If θa _2.5 is 5.5° or less, the decrease in contrast can be suppressed, and the outdoor anti-glare property and contrast can be balanced. θa _2.5 preferably satisfies 1.3°≦θa _2.5 ≦4.5°, and further preferably satisfies 2.0°≦θa _2.5 ≦4.0°. In addition, if θa _2.5 is 1.3° or more, the color unevenness of the gradation peculiar to the retardation value of the transparent substrate can be made difficult to notice. Furthermore, if it is 2.0° or more, for example, for a display element with a wide color gamut, the color unevenness of the gradation color can be made more difficult to notice.

此處，「平均傾斜角θa」係小阪研究所公司製造之表面粗糙度測量器(商品名：SE-3400)之操作說明書(1995.07.20修訂)所定義之值，如圖3所示般，可藉由存在於基準長度L中之凸部高度之和(h₁+h₂+h₃+‧‧‧+h_n)之反正切θa=tan^-1{(h₁+h₂+h₃+‧‧‧+h_n)/L}而求出。 Here, the "average inclination angle θa" is the value defined in the operation manual (1995.07.20 revision) of the surface roughness measuring instrument (trade name: SE-3400) manufactured by Kosaka Research Laboratory, as shown in Figure 3. may be present in the reference length L by the height of the convex portion and _{(h 1 + h 2 + h} 3 + ‧‧‧ + h n) of the arctangent _{^{θa = tan -1 {(h 1}} + h 2 + h 3 +‧‧‧+h _n )/L}.

又，θa可根據下述式(A)算出。 In addition, θa can be calculated according to the following formula (A).

[式(A)中，「L」表示基準長度，「dy/dx」表示粗糙度曲線之各單位區間之斜率]。 [In formula (A), "L" represents the reference length, and "dy/dx" represents the slope of each unit interval of the roughness curve].

再者，所謂「基準長度」，意指「截止值」。即，於截止值為0.8mm之情形時，基準長度為0.8mm。又，所謂單位測量區間，係用截止值除以取樣數所得之長度之區間。取樣數設為1500。 Furthermore, the so-called "reference length" means "cut-off value". That is, when the cutoff value is 0.8 mm, the reference length is 0.8 mm. Also, the so-called unit measurement interval is the interval obtained by dividing the cut-off value by the number of samples. The number of samples is set to 1500.

進而，上述凹凸較佳為上述(θa_2.5)與上述Ry_2.5/Rz_2.5滿足以下之條件(A7)。 Furthermore, it is preferable that the aforementioned concavities and convexities are such that the aforementioned (θa _2.5 ) and the aforementioned Ry _2.5 /Rz _2.5 satisfy the following condition (A7).

0.8≦θa_2.5/(Ry_2.5/Rz_2.5)≦5.0 (A7) 0.8≦θa _2.5 /(Ry _2.5 /Rz _2.5 )≦5.0 (A7)

若θa_2.5/(Ry_2.5/Rz_2.5)為上述範圍內，則成為具有適度無規性之凹凸，而可使防眩性、解像性、操作時之觸感(滑動感)、及可使透明基材之延遲值所特有之漸變色之色不均難以引人注目的平衡性變得良好。 If θa _2.5 /(Ry _2.5 /Rz _2.5 ) is in the above range, it becomes unevenness with moderate randomness, and can provide anti-glare, resolution, touch (slidability) during operation, and make The color unevenness of the gradation that is unique to the retardation value of the transparent substrate is difficult to notice and the balance becomes good.

θa_2.5/(Ry_2.5/Rz_2.5)更佳為1.0以上且4.5以下，即便於色域廣之顯示元件之情形時，亦可使漸變色之色不均難以引人注目，因此進而較佳為2.0以上且4.0以下。 θa _2.5 /(Ry _2.5 /Rz _2.5 ) is more preferably 1.0 or more and 4.5 or less. Even in the case of a display element with a wide color gamut, the color unevenness of the gradation color can be made difficult to notice, so it is more preferably 2.0 or more and 4.0 or less.

進而，關於上述凹凸，較佳將截止值設為2.5mm時之JIS B0601：1994之凹凸的平均間隔(Sm_2.5)滿足以下的條件。 Furthermore, with regard to the aforementioned concavities and convexities, it is preferable that the average interval (Sm _2.5 ) of concavities and convexities of JIS B0601: 1994 when the cut-off value is set to 2.5 mm satisfies the following conditions.

Sm_2.5≦160μm Sm _2.5 ≦160μm

若Sm_2.5為160μm以下，則手指與光學片表面之接觸面積減少，而可使觸感(滑動感)變得更為良好。Sm_2.5更佳為150μm以下，進而較佳為145μm以下。又，下限值較佳為30μm以上，更佳為50μm以上，進而較佳為100μm以上。 If Sm _2.5 is 160 μm or less, the contact area between the finger and the surface of the optical sheet is reduced, and the touch (slidability) can be improved. Sm _{2.5 is more} preferably 150 μm or less, and still more preferably 145 μm or less. In addition, the lower limit is preferably 30 μm or more, more preferably 50 μm or more, and still more preferably 100 μm or more.

再者，Sm_2.5越小，即便為高清顯示器，亦越可抑制炫光之產生。 Furthermore, the _{smaller Sm 2.5} is, the more the glare can be suppressed even for high-definition displays.

作為上述凹凸之形成方法，例如可列舉：(x1)壓紋、噴砂、蝕刻等物理或化學處理、(x2)利用模具之成型、(x3)利用塗佈之凹凸層之形成等。該等方法中，就凹凸形狀之再現性之觀點而言，較佳為(x2)利用模具之成型，就生產性及對應多品種之觀點而言，較佳為(x3)利用塗佈之凹凸層之形成。 As a method of forming the above-mentioned unevenness, for example, (x1) physical or chemical treatments such as embossing, sandblasting, and etching, (x2) molding with a mold, (x3) formation of an uneven layer by coating, and the like. Among these methods, from the viewpoint of the reproducibility of the concave-convex shape, it is preferable to use (x2) molding with a mold, and from the viewpoint of productivity and the corresponding variety, it is preferable to use (x3) the concave-convex by coating The formation of layers.

利用模具之成型可藉由製作由與凹凸互補之形狀構成之模具，使形成凹凸之材料流入至該模具中，然後自模具取出而形成。此處，若使用構成凹凸之材料作為該材料，使該材料流入至模具中後重疊透明基材，並將凹凸連同透明基材一起自模具取出，則可獲得透明基材上具有凹凸之光學片。又，若使構成透明基材之材料流入至模具中後自模具取出，則可獲得由透明基材單層構成，且於該透明基材表面具有凹凸之光學片。 Molding using a mold can be formed by making a mold composed of a shape complementary to the unevenness, flowing the uneven-forming material into the mold, and then taking it out of the mold. Here, if the material constituting the concavities and convexities is used as the material, the material is poured into the mold and then the transparent substrate is superimposed, and the concavities and convexities are taken out from the mold together with the transparent substrate, then an optical sheet with concavities and convexities on the transparent substrate can be obtained . In addition, if the material constituting the transparent substrate is poured into the mold and then taken out from the mold, an optical sheet composed of a single layer of the transparent substrate and having unevenness on the surface of the transparent substrate can be obtained.

於使用硬化性樹脂組成物(熱硬化性樹脂組成物或游離輻射硬化性樹脂組成物)作為流入至模具中之材料之情形時，較佳於自模具取出前使硬化性樹脂組成物硬化。 When a curable resin composition (thermosetting resin composition or ionizing radiation curable resin composition) is used as the material to be poured into the mold, it is preferable to harden the curable resin composition before taking it out of the mold.

就凹凸形狀之再現性優異之方面而言，較佳利用模具形成凹凸。 In terms of excellent reproducibility of the uneven shape, it is preferable to form the unevenness with a mold.

利用塗佈之凹凸層之形成可藉由將含有樹脂成分及粒子而成之凹凸層形成塗佈液利用凹版塗佈、棒式塗佈等公知之塗佈方法塗佈於透明基材上，並視需要進行乾燥、硬化而形成。為了使凹凸層滿足上述之條件(A1)及(A2)，較佳將凹凸層之膜厚、粒子之含量、及粒子之平均粒徑設為下述之範圍。 The concave-convex layer formed by coating can be formed by applying a coating solution for forming a concave-convex layer containing resin components and particles on a transparent substrate by a well-known coating method such as gravure coating and bar coating. It can be formed by drying and hardening as needed. In order for the uneven layer to satisfy the above-mentioned conditions (A1) and (A2), it is preferable to set the film thickness of the uneven layer, the content of particles, and the average particle diameter of the particles within the following ranges.

凹凸層之膜厚較佳為1.5~10μm，更佳為2~8μm，進而較佳為3~7μm。凹凸層之膜厚例如可根據使用穿透式電子顯微鏡(TEM)或掃描穿透式電子顯微鏡(STEM)所拍攝到之剖面之圖像測量20處的厚度，並根據20處之值之平均值而算出。TEM或STEM之加速電壓較佳設為1~5kV，倍率較佳設為1000~1萬倍。 The film thickness of the concavo-convex layer is preferably 1.5-10 μm, more preferably 2-8 μm, and still more preferably 3-7 μm. The film thickness of the concave-convex layer can be measured at 20 locations based on the cross-sectional image taken by a transmission electron microscope (TEM) or a scanning transmission electron microscope (STEM), and the average value of the 20 locations And figure it out. The acceleration voltage of TEM or STEM is preferably set to 1 to 5 kV, and the magnification is preferably set to 1000 to 10,000 times.

粒子只要為可形成凹凸者，則可使用有機粒子及無機粒子中之任一種。作為有機粒子，可列舉：由聚甲基丙烯酸甲酯、聚丙烯酸-苯 乙烯共聚物、三聚氰胺樹脂、聚碳酸酯、聚苯乙烯、聚氯乙烯、苯胍胺-三聚氰胺-甲醛縮合物、聚矽氧、氟系樹脂及聚酯系樹脂等構成之粒子。作為無機粒子，可列舉：由二氧化矽、氧化鋁、氧化鋯及氧化鈦等構成之粒子。該等粒子中，就分散控制之容易性之觀點而言，較佳為透光性有機粒子、或二氧化矽粒子。 Any of organic particles and inorganic particles can be used as the particles as long as they can form irregularities. Examples of organic particles include: polymethylmethacrylate, polyacrylic acid-benzene Particles composed of ethylene copolymer, melamine resin, polycarbonate, polystyrene, polyvinyl chloride, benzoguanamine-melamine-formaldehyde condensate, polysiloxane, fluorine-based resin, and polyester-based resin. Examples of inorganic particles include particles composed of silica, alumina, zirconia, and titanium oxide. Among these particles, from the viewpoint of ease of dispersion control, light-transmitting organic particles or silica particles are preferred.

上述粒子可單獨使用1種，或組合材質或粒徑不同之2種以上而使用。 The above-mentioned particles can be used alone or in combination of two or more of different materials or particle sizes.

又，為了即便於色域廣之顯示元件之情形時，亦使漸變色之色不均難以引人注目，粒子較佳為具有可見光線之波長以上之粒徑之不定形粒子。藉由凹凸層含有不定形粒子，可抑制漸變色之色不均。 In addition, in order to make the color unevenness of the gradation color less noticeable even in the case of a display element with a wide color gamut, the particles are preferably amorphous particles having a particle size above the wavelength of visible light. Since the uneven layer contains irregular particles, the uneven color of the gradation can be suppressed.

粒子之含量較佳為形成凹凸層之全部固形物成分中之5~25質量%，更佳為6~22質量%，進而較佳為10~20質量%。 The content of the particles is preferably 5-25% by mass, more preferably 6-22% by mass, and still more preferably 10-20% by mass of the total solid components forming the uneven layer.

凹凸層中之粒子之平均粒徑由於視凹凸層之厚度而不同，故而無法一概而論，但就容易滿足條件(A1)及條件(A2)之觀點而言，較佳為1.0~10.0μm，更佳為1.5~8.0μm，進而較佳為2.0~6.0μm。於粒子凝集之情形時，凝集粒子之平均粒徑較佳滿足上述範圍。 The average particle size of the particles in the uneven layer is different depending on the thickness of the uneven layer, so it cannot be generalized, but from the viewpoint of easily satisfying the condition (A1) and the condition (A2), it is preferably 1.0 to 10.0 μm, more preferably It is 1.5 to 8.0 μm, more preferably 2.0 to 6.0 μm. In the case of agglomeration of particles, the average particle diameter of the agglomerated particles preferably satisfies the above-mentioned range.

粒子之平均粒徑可藉由以下之(y1)~(y3)之作業而算出。 The average particle size of the particles can be calculated by the following operations (y1) ~ (y3).

(y1)自使用穿透式電子顯微鏡(TEM)或掃描穿透式電子顯微鏡(STEM)所拍攝到之剖面之圖像中選擇觀察畫面中看起來最大的粒子。TEM或STEM之加速電壓較佳設為1~30kV，倍率較佳設為5000倍~30萬倍。 (y1) Select the largest particle in the observation frame from the cross-sectional images taken by the transmission electron microscope (TEM) or the scanning transmission electron microscope (STEM). The acceleration voltage of TEM or STEM is preferably set to 1-30 kV, and the magnification is preferably set to 5000 to 300,000 times.

(y2)自觀察圖像中抽選看起來最大徑之粒子，算出各粒子之粒徑。粒徑係以直線間距離之形式進行測量，該直線間距離係用任意平行之2條 直線夾住粒子之剖面時，如該2條直線間距離成為最大之2條直線之組合中的直線間距離。 (y2) Select the particles with the largest diameter from the observation image, and calculate the particle size of each particle. The particle size is measured in the form of the distance between the straight lines, and the distance between the straight lines is any two parallel lines. When a straight line clamps the cross section of the particle, the distance between the two straight lines becomes the distance between the two largest straight lines in the combination.

(y3)於相同樣品之另一畫面之觀察圖像中進行同樣之作業，將自合計20個量之粒徑之數量平均所獲得之值設為粒子的平均粒徑。 (y3) Perform the same operation on the observation image of another screen of the same sample, and set the value obtained from the number average of the total 20 particle diameters as the average particle diameter of the particles.

再者，於凝集粒子之情形時，將凝集塊之最大徑部分視作粒徑。 Furthermore, in the case of agglomerated particles, the largest diameter part of the agglomerated mass is regarded as the particle size.

又，下述之超微粒子之平均粒徑可藉由與上述(y1)~(y3)相同之方法而算出。算出超微粒子之平均粒徑時，TEM或STEM之加速電壓較佳設為10kv~30kV，倍率較佳設為1萬~30萬倍。 In addition, the average particle diameter of the following ultrafine particles can be calculated by the same method as (y1) to (y3) above. When calculating the average particle size of the ultrafine particles, the acceleration voltage of TEM or STEM is preferably set to 10kv~30kV, and the magnification is preferably set to 10,000~300,000 times.

就凹凸層容易滿足上述之條件(A1)及(A2)之觀點而言，凹凸層之膜厚較佳大於粒子之平均粒徑。又，更具體而言，[粒子之平均粒徑]/[凹凸層之膜厚]之比，較佳為0.20~0.99，更佳為0.50~0.90。 From the viewpoint that the uneven layer easily satisfies the above-mentioned conditions (A1) and (A2), the film thickness of the uneven layer is preferably larger than the average particle diameter of the particles. Furthermore, more specifically, the ratio of [average particle diameter of particles]/[film thickness of uneven layer] is preferably 0.20 to 0.99, and more preferably 0.50 to 0.90.

粒子亦可為粒徑分佈廣者(單一粒子且粒徑分佈廣者、或者混合粒徑分佈不同之2種以上之粒子而成之混合粒子且粒徑分佈廣者)，就抑制炫光之觀點而言，較佳為粒徑分佈較窄者。 The particles can also be those with a wide particle size distribution (a single particle with a wide particle size distribution, or a mixed particle formed by mixing two or more particles with different particle size distributions and a wide particle size distribution), from the viewpoint of suppressing glare In general, those with a narrower particle size distribution are preferred.

又，作為粒子，較佳為不僅含有如上述之微米級粒子，亦含有奈米級超微粒子。藉由含有奈米級超微粒子，而凹凸層變得容易滿足上述之條件(A1)及(A2)。可認為其原因在於：於含有超微粒子之情形時，即便於不存在粒子之處亦會形成平緩之傾斜，而形成低頻凹凸(於截止值0.8mm時被截斷，但於截止值2.5mm時未被截斷之凹凸)。於含有超微粒子之情形時，塗佈液之觸變性及溶劑之乾燥特性會受影響，而不會產生如通常之整平，因此認為會產生如上述之現象。 Furthermore, as the particles, it is preferable to contain not only the above-mentioned micron-sized particles but also nano-sized ultrafine particles. By containing nano-level ultrafine particles, the uneven layer can easily satisfy the above-mentioned conditions (A1) and (A2). It can be considered that the reason is that when ultrafine particles are contained, a gentle slope is formed even where there are no particles, and low-frequency bumps are formed (cut off at a cut-off value of 0.8mm, but not at a cut-off value of 2.5mm. Truncated bumps). In the case of containing ultrafine particles, the thixotropy of the coating liquid and the drying characteristics of the solvent will be affected, and the usual leveling will not occur, so it is believed that the above-mentioned phenomenon will occur.

超微粒子較佳為無機微粒子。作為無機超微粒子，可列舉： 由二氧化矽、氧化鋁、氧化鋯及二氧化鈦等構成之超微粒子。該等中，就透明性之觀點而言，較佳為二氧化矽超微粒子。 The ultrafine particles are preferably inorganic fine particles. Examples of inorganic ultrafine particles include: Ultrafine particles composed of silica, alumina, zirconia and titania. Among them, from the viewpoint of transparency, ultrafine silica particles are preferred.

超微粒子較佳為平均一次粒徑為1~25nm，更佳為5~20nm。若為上述範圍內，則凹凸層變得容易滿足上述之條件(A1)及(A2)。 The ultrafine particles preferably have an average primary particle size of 1-25 nm, more preferably 5-20 nm. If it is in the above range, the uneven layer will easily satisfy the above-mentioned conditions (A1) and (A2).

超微粒子較佳為經表面處理之超微粒子，或進而導入有反應性基之反應性超微粒子。藉由導入表面處理，而變得容易取得與凹凸層中之有機黏合劑或溶劑之平衡性，而凹凸層可容易滿足上述之條件(A1)及(A2)。作為此種經表面處理之超微粒子，可列舉：經矽烷偶合劑表面處理之無機超微粒子。利用矽烷偶合劑對無機超微粒子之表面進行處理時，可列舉：將矽烷偶合劑向無機超微粒子進行噴射之乾式法；或使無機超微粒子分散於溶劑中後添加矽烷偶合劑而使之反應之濕式法等。 The ultrafine particles are preferably surface-treated ultrafine particles, or further reactive ultrafine particles with reactive groups introduced. By introducing surface treatment, it becomes easy to achieve balance with the organic binder or solvent in the uneven layer, and the uneven layer can easily satisfy the above-mentioned conditions (A1) and (A2). Examples of such surface-treated ultrafine particles include inorganic ultrafine particles that have been surface-treated with a silane coupling agent. When using a silane coupling agent to treat the surface of the inorganic ultrafine particles, examples include: the dry method of spraying the silane coupling agent onto the inorganic ultrafine particles; or dispersing the inorganic ultrafine particles in a solvent and then adding the silane coupling agent to react them. Wet method, etc.

於導入反應性基之情形時，可較佳地使用聚合性不飽和基，較佳為光硬化性不飽和基，尤佳為游離輻射硬化性不飽和基。作為其具體例，可列舉：(甲基)丙烯醯基、(甲基)丙烯醯氧基、乙烯基及烯丙基等乙烯性不飽和鍵以及環氧基等。 In the case of introducing a reactive group, a polymerizable unsaturated group can be preferably used, preferably a photocurable unsaturated group, and particularly preferably an ionizing radiation curable unsaturated group. Specific examples thereof include (meth)acryloyl groups, (meth)acryloyloxy groups, ethylenic unsaturated bonds such as vinyl groups and allyl groups, epoxy groups, and the like.

超微粒子之含量較佳為形成凹凸層之全部固形物成分中之0.2~60質量%。可視使用超微粒子之目的而調整超微粒子之含量，就使硬度或耐擦傷性提高之觀點而言，較佳為15~50質量%，就光學特性之提高、及凹凸製備之觀點而言，較佳為0.4~10質量%。又，藉由設為上述範圍內，可藉由控制整平性、及抑制凹凸層之聚合收縮，而使凹凸層變得容易滿足上述之條件(A1)及(A2)。 The content of ultrafine particles is preferably 0.2-60% by mass of all solid components forming the uneven layer. The content of the ultrafine particles can be adjusted depending on the purpose of using the ultrafine particles. From the viewpoint of improving the hardness or scratch resistance, it is preferably 15-50% by mass. From the viewpoint of the improvement of optical properties and the preparation of unevenness, it is more Preferably, it is 0.4 to 10% by mass. In addition, by setting it within the above range, the uneven layer can easily satisfy the above-mentioned conditions (A1) and (A2) by controlling the leveling properties and suppressing the polymerization shrinkage of the uneven layer.

又，於凹凸層中包含其他粒子之情形時，其他粒子與超微粒子之含量 比(其他粒子之含量/超微粒子之含量)較佳為0.05~3.0，更佳為0.1~1.5，進而上限較佳為0.7以下。藉由設為上述範圍內，而可使凹凸層變得容易滿足上述之條件(A1)及(A2)。再者，藉由僅使超微粒子凝集，亦可製成μm級之粒子而形成凹凸。 Also, when other particles are included in the uneven layer, the content of other particles and ultrafine particles The ratio (content of other particles/content of ultrafine particles) is preferably 0.05 to 3.0, more preferably 0.1 to 1.5, and the upper limit is preferably 0.7 or less. By setting it within the above-mentioned range, the uneven layer can easily satisfy the above-mentioned conditions (A1) and (A2). Furthermore, by only agglomerating ultrafine particles, it is also possible to make particles of the μm order to form unevenness.

凹凸層之樹脂成分較佳包含熱硬化性樹脂組成物或游離輻射硬化性樹脂組成物，就使機械強度變得更為良好之觀點而言，更佳包含游離輻射硬化性樹脂組成物，其中，進而較佳包含紫外線硬化性樹脂組成物。 The resin component of the concavo-convex layer preferably contains a thermosetting resin composition or an ionizing radiation curable resin composition, and from the viewpoint of improving the mechanical strength, it is more preferable to contain an ionizing radiation curable resin composition. Among them, Furthermore, it is preferable to contain an ultraviolet curable resin composition.

熱硬化性樹脂組成物係至少包含熱硬化性樹脂之組成物，且係藉由加熱而硬化之樹脂組成物。 The thermosetting resin composition is a composition containing at least a thermosetting resin, and is a resin composition that is cured by heating.

作為熱硬化性樹脂，可列舉：丙烯酸樹脂、胺酯樹脂(urethane resin)、酚樹脂、脲三聚氰胺樹脂、環氧樹脂、不飽和聚酯樹脂、聚矽氧樹脂等。於熱硬化性樹脂組成物中，視需要向該等硬化性樹脂添加硬化劑。 Examples of thermosetting resins include acrylic resins, urethane resins, phenol resins, urea melamine resins, epoxy resins, unsaturated polyester resins, silicone resins, and the like. In the thermosetting resin composition, a curing agent is added to the curable resin as necessary.

游離輻射硬化性樹脂組成物係包含具有游離輻射硬化性官能基之化合物(以下，亦稱為「游離輻射硬化性化合物」)之組成物。作為游離輻射硬化性官能基，可列舉：(甲基)丙烯醯基、乙烯基、烯丙基等乙烯性不飽和鍵結基，及環氧基、氧環丁烷基(oxetanyl)等。作為游離輻射硬化性化合物，較佳為具有乙烯性不飽和鍵結基之化合物，更佳為具有2個以上之乙烯性不飽和鍵結基之化合物，其中，進而較佳為具有2個以上之乙烯性不飽和鍵結基之多官能性(甲基)丙烯酸酯系化合物。作為多官能性(甲基)丙烯酸酯系化合物，單體及低聚物均可使用。 The ionizing radiation curable resin composition is a composition containing a compound having an ionizing radiation curable functional group (hereinafter, also referred to as "ionizing radiation curable compound"). Examples of the ionizing radiation-curable functional group include ethylenically unsaturated bonding groups such as (meth)acryloyl, vinyl, and allyl groups, epoxy groups, and oxetanyl groups. The ionizing radiation curable compound is preferably a compound having an ethylenically unsaturated bond group, more preferably a compound having two or more ethylenically unsaturated bond groups, and among them, it is more preferably a compound having two or more ethylenically unsaturated bond groups. Multifunctional (meth)acrylate compound of ethylenically unsaturated bond group. As the polyfunctional (meth)acrylate compound, both monomers and oligomers can be used.

再者，所謂游離輻射，意指電磁波或帶電粒子束中具有可使分子聚合 或交聯之能量量子者，通常可使用紫外線(UV)或電子束(EB)，此外，亦可使用X射線、γ射線等電磁波；α射線、離子束等帶電粒子束。 Furthermore, the so-called ionizing radiation refers to the presence of electromagnetic waves or charged particle beams that can polymerize molecules Or cross-linked energy quantum, usually ultraviolet (UV) or electron beam (EB) can be used. In addition, electromagnetic waves such as X-rays and γ-rays; charged particle beams such as α-rays and ion beams can also be used.

多官能性(甲基)丙烯酸酯系化合物中，作為2官能(甲基)丙烯酸酯系單體，可列舉：乙二醇二(甲基)丙烯酸酯、雙酚A四乙氧基二丙烯酸酯、雙酚A四丙氧基二丙烯酸酯、1,6-己二醇二丙烯酸酯、二環戊烯基二(甲基)丙烯酸酯、三乙二醇二丙烯酸酯、四乙二醇二(甲基)丙烯酸酯、三環癸烷二基二亞甲基二(甲基)丙烯酸酯、三(2-羥乙基)三聚異氰酸酯二(甲基)丙烯酸酯等。 Among the polyfunctional (meth)acrylate-based compounds, examples of bifunctional (meth)acrylate-based monomers include ethylene glycol di(meth)acrylate and bisphenol A tetraethoxy diacrylate , Bisphenol A tetrapropoxy diacrylate, 1,6-hexanediol diacrylate, dicyclopentenyl di(meth)acrylate, triethylene glycol diacrylate, tetraethylene glycol di( Meth) acrylate, tricyclodecanediyl dimethylene di(meth)acrylate, tris(2-hydroxyethyl) trimer isocyanate di(meth)acrylate, etc.

作為3官能以上之(甲基)丙烯酸酯系單體，例如可列舉：三羥甲基丙烷三(甲基)丙烯酸酯、三羥甲基乙烷三(甲基)丙烯酸酯、新戊四醇三(甲基)丙烯酸酯、新戊四醇四(甲基)丙烯酸酯、新戊四醇六(甲基)丙烯酸酯、二-三羥甲基丙烷四(甲基)丙烯酸酯、二新戊四醇六(甲基)丙烯酸酯、二新戊四醇五(甲基)丙烯酸酯、二新戊四醇四(甲基)丙烯酸酯、二-三羥甲基丙烷四(甲基)丙烯酸酯、三(2-羥乙基)三聚異氰酸酯三(甲基)丙烯酸酯等。 Examples of (meth)acrylate monomers having trifunctional or higher functions include trimethylolpropane tri(meth)acrylate, trimethylolethane tri(meth)acrylate, and neopentylerythritol Tris(meth)acrylate, neopentyl erythritol tetra(meth)acrylate, neopentyl erythritol hexa(meth)acrylate, di-trimethylolpropane tetra(meth)acrylate, dinepentyl Tetraol hexa (meth) acrylate, dineopentyl erythritol penta (meth) acrylate, dineopentaerythritol tetra (meth) acrylate, di-trimethylolpropane tetra (meth) acrylate , Tris (2-hydroxyethyl) trimeric isocyanate, tris (meth) acrylate, etc.

又，上述(甲基)丙烯酸酯系單體亦可為分子骨架之一部分經改質者，亦可使用經環氧乙烷、環氧丙烷、己內酯、異三聚氰酸、烷基、環狀烷基、芳香族、雙酚等改質而成者。 In addition, the above-mentioned (meth)acrylate-based monomers can also be modified as part of the molecular skeleton, and can also be used with ethylene oxide, propylene oxide, caprolactone, isocyanuric acid, alkyl, Modified cyclic alkyl, aromatic, bisphenol, etc.

又，作為多官能性(甲基)丙烯酸酯系低聚物，可列舉：胺酯(甲基)丙烯酸酯(urethane(meth)acrylate)、環氧(甲基)丙烯酸酯、聚酯(甲基)丙烯酸酯、聚醚(甲基)丙烯酸酯等丙烯酸酯系聚合物等。 In addition, as polyfunctional (meth)acrylate oligomers, urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate, and polyester (meth)acrylate can be cited. ) Acrylate-based polymers such as acrylates and polyether (meth)acrylates.

胺酯(甲基)丙烯酸酯例如可藉由多元醇及有機二異氰酸酯與羥基(甲基)丙烯酸酯之反應而獲得。 The urethane (meth)acrylate can be obtained, for example, by the reaction of a polyol and an organic diisocyanate with a hydroxyl (meth)acrylate.

又，較佳之環氧(甲基)丙烯酸酯係使3官能以上之芳香族環氧樹脂、脂環族環氧樹脂、脂肪族環氧樹脂等與(甲基)丙烯酸進行反應而獲得之(甲基)丙烯酸酯；使2官能以上之芳香族環氧樹脂、脂環族環氧樹脂、脂肪族環氧樹脂等與多元酸及(甲基)丙烯酸進行反應而獲得之(甲基)丙烯酸酯；及使2官能以上之芳香族環氧樹脂、脂環族環氧樹脂、脂肪族環氧樹脂等與酚類及(甲基)丙烯酸進行反應而獲得之(甲基)丙烯酸酯。 In addition, the preferred epoxy (meth)acrylate is obtained by reacting a trifunctional or higher aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, etc. with (meth)acrylic acid (A Base) acrylate; (meth)acrylate obtained by reacting bifunctional or higher aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, etc., with polybasic acid and (meth)acrylic acid; And (meth)acrylate obtained by reacting bifunctional or higher aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, etc., with phenols and (meth)acrylic acid.

上述游離輻射硬化性化合物可單獨使用1種，或組合2種以上使用。 The above-mentioned ionizing radiation-curable compounds can be used singly or in combination of two or more kinds.

於游離輻射硬化性化合物為紫外線硬化性化合物之情形時，游離輻射硬化性組成物較佳含有光聚合起始劑或光聚合促進劑等添加劑。 When the ionizing radiation curable compound is an ultraviolet curable compound, the ionizing radiation curable composition preferably contains additives such as a photopolymerization initiator or a photopolymerization accelerator.

作為光聚合起始劑，可列舉：選自苯乙酮、二苯甲酮、α-羥烷基苯酮(α-hydroxyalkylphenone)、α-胺烷基苯酮、α-羥基酮、米其勒酮、安息香、二苯乙二酮甲基縮酮、苯甲醯基苯甲酸酯、α-醯基肟酯、醯基氧化膦類、9-氧硫

類等中之1種以上。 Examples of the photopolymerization initiator include: selected from acetophenone, benzophenone, α-hydroxyalkylphenone (α-hydroxyalkylphenone), α-aminoalkylphenone, α-hydroxyketone, and Michele Ketones, benzoin, benzophenone methyl ketal, benzyl benzoate, α-oxime ester, phosphine oxides, 9-oxysulfur

One or more of the categories.

上述光聚合起始劑中，較佳適當選擇雙(2,4,6-三甲基苯甲醯基)-苯基氧化膦、寡(2-羥基-2-甲基-1-[4-(1-甲基乙烯基)苯基]丙酮、2-羥基-2-甲基-1-苯基-丙烷-1-酮、1-羥基-環己基-苯基-酮及2-甲基-1-(4-甲基噻吩基)-2-N-

啉基丙烷-1-酮中之1種或複數種。 Among the above-mentioned photopolymerization initiators, bis(2,4,6-trimethylbenzyl)-phenylphosphine oxide, oligo(2-hydroxy-2-methyl-1-[4- (1-methylvinyl)phenyl)acetone, 2-hydroxy-2-methyl-1-phenyl-propane-1-one, 1-hydroxy-cyclohexyl-phenyl-ketone and 2-methyl- 1-(4-Methylthienyl)-2-N-

One or more of the hydroxypropan-1-ones.

光聚合起始劑並不限定於上述化合物，只要有藉由紫外線而使之開始聚合之能力，則可為任意者。該等光聚合起始劑可單獨使用1種，或組合2種以上使用。 The photopolymerization initiator is not limited to the above-mentioned compound, and may be any one as long as it has the ability to initiate polymerization by ultraviolet rays. These photopolymerization initiators can be used individually by 1 type or in combination of 2 or more types.

游離輻射硬化性樹脂組成物中之光聚合起始劑之含量並無特別限制， 較佳為相對於紫外線硬化性化合物之總量100質量份，於1~20質量份之範圍內使用。於使用複數種之情形時，較佳為將各自於上述範圍內使用。 The content of the photopolymerization initiator in the ionizing radiation curable resin composition is not particularly limited. Preferably, it is used within the range of 1-20 parts by mass relative to 100 parts by mass of the total amount of the ultraviolet curable compound. In the case of using a plurality of types, it is preferable to use each within the above-mentioned range.

光聚合起始劑較佳為熔點為100℃以上。藉由將光聚合起始劑之熔點設為100℃以上，而因觸控面板之透明導電膜形成時或結晶化步驟之熱而殘留之光聚合起始劑昇華，從而可防止損害透明導電膜之低電阻化。 The photopolymerization initiator preferably has a melting point of 100°C or higher. By setting the melting point of the photopolymerization initiator to 100°C or higher, the photopolymerization initiator remaining due to the heat during the formation of the transparent conductive film of the touch panel or the heat of the crystallization step is sublimated, thereby preventing damage to the transparent conductive film The low resistance.

又，光聚合促進劑係可減輕硬化時之由空氣引起之聚合抑制而使硬化速度加快者，例如可列舉：選自對二甲胺基苯甲酸異戊酯、對二甲胺基苯甲酸乙酯等中之1種以上。 In addition, the photopolymerization accelerator can reduce the polymerization inhibition caused by air during curing and accelerate the curing speed. For example, it can be selected from the group consisting of isoamyl p-dimethylamino benzoate and ethyl p-dimethylamino benzoate. One or more of esters.

又，凹凸層形成塗佈液較佳含有調平劑。作為調平劑，例如可列舉：氟系調平劑、聚矽氧系調平劑、氟素聚矽氧共聚物系調平劑等。其中，就使凹凸層容易滿足上述條件(A1)及(A2)之觀點而言，可較佳地使用聚矽氧系調平劑。又，相比反應性者，非反應性者有觸控面板操作性良好之傾向。 In addition, the coating liquid for forming an uneven layer preferably contains a leveling agent. As the leveling agent, for example, a fluorine-based leveling agent, a silicone-based leveling agent, a fluorine-based polysiloxane copolymer-based leveling agent, and the like can be cited. Among them, from the viewpoint of making the uneven layer easily satisfy the above-mentioned conditions (A1) and (A2), a silicone-based leveling agent can be preferably used. Moreover, compared with the reactive ones, the non-reactive ones tend to have better operability of the touch panel.

作為調平劑之添加量，較佳相對於凹凸層之全部固形物成分，為0.01~5.0重量%。 The addition amount of the leveling agent is preferably 0.01 to 5.0% by weight with respect to the total solid content of the uneven layer.

光學片之凹凸較佳為進行防污處理而成。藉由實施防污處理，而可抑制污漬留在凹凸中而損害實施形態A之表面形狀。又，利用氟系脫模劑或聚矽氧系脫模劑等之防污處理在對凹凸賦予滑動性，容易滿足條件(A1)，並且可使觸感變得更為良好之方面上較佳。 The unevenness of the optical sheet is preferably formed by anti-fouling treatment. By implementing the antifouling treatment, it is possible to prevent stains from remaining in the unevenness and impairing the surface shape of the embodiment A. In addition, antifouling treatment with fluorine-based mold release agents or silicone-based mold release agents is preferable in that it imparts sliding properties to irregularities, easily meets the condition (A1), and can make the touch feel better. .

作為防污處理之手段，可列舉：使凹凸層含有氟系脫模劑、聚矽氧系脫模劑等脫模劑之手段、於光學片之最表面藉由上述脫模劑形成脫模層之手段。於使凹凸層含有脫模劑之情形時，脫模劑之含量較佳設為凹凸層之 全部固形物成分之0.5~5.0質量%。 Examples of anti-fouling treatment methods include: a method of making the uneven layer contain a fluorine-based mold release agent, a silicone-based mold release agent, and other mold release agents; The means. When the uneven layer contains a release agent, the content of the release agent is preferably set to that of the uneven layer 0.5~5.0% by mass of all solid components.

(透明基材) (Transparent substrate)

作為光學片所使用之透明基材，較佳為具備透光性、平滑性、耐熱性，且機械強度優異者。作為此種透明基材，可列舉：聚酯、三乙醯纖維素(TAC)、二醋酸纖維素酯、醋酸丁酸纖維素、聚醯胺、聚醯亞胺、聚醚碸、聚碸、聚丙烯、聚甲基戊烯、聚氯乙烯、聚乙烯醇縮醛、聚醚酮、聚甲基丙烯酸甲酯、聚碳酸酯、聚胺基甲酸酯及非晶質烯烴(Cyclo-Olefin-Polymer：COP)等塑膠膜。透明基材亦可為貼合2片以上之塑膠膜而成者。 As the transparent substrate used in the optical sheet, one having light transmittance, smoothness, heat resistance, and excellent mechanical strength is preferred. Examples of such transparent substrates include: polyester, triacetyl cellulose (TAC), cellulose diacetate, cellulose acetate butyrate, polyamide, polyimide, polyether turbinate, polysulfide, Polypropylene, polymethylpentene, polyvinyl chloride, polyvinyl acetal, polyether ketone, polymethyl methacrylate, polycarbonate, polyurethane and amorphous olefins (Cyclo-Olefin- Polymer: COP) and other plastic films. The transparent substrate can also be formed by laminating two or more plastic films.

又，除藉由熔融擠製成形法：extrusion molding(吹脹法、T型模頭法)或溶液澆鑄法：solution casting、壓延法：calendaring等通用方法所製造之上述塑膠膜以外，亦可為於具有脫模性之基材上形成由游離輻射硬化型樹脂組成物等樹脂構成之塗膜，自該基材剝離該塗膜而製作之膜。 Moreover, in addition to the above-mentioned plastic film produced by general methods such as melt extrusion molding (inflation molding method, T-die method) or solution casting method: solution casting, calendaring method: calendaring, etc., it may also be A coating film made of a resin such as an ionizing radiation curable resin composition is formed on a substrate having mold releasability, and the coating film is peeled from the substrate to produce a film.

上述中，就機械強度或尺寸穩定性之觀點而言，較佳為經延伸加工、尤其是雙軸延伸加工之聚酯(聚對酞酸乙二酯、聚萘二甲酸乙二酯(polyethylene naphthalate))。又，COP、聚酯在耐候性優異之方面上較佳。 Among the above, from the viewpoint of mechanical strength or dimensional stability, polyesters (polyethylene terephthalate, polyethylene naphthalate (polyethylene naphthalate )). In addition, COP and polyester are preferable in that they are excellent in weather resistance.

透明基材之厚度較佳為5~300μm，更佳為10~200μm，進而較佳為20~130μm。 The thickness of the transparent substrate is preferably 5 to 300 μm, more preferably 10 to 200 μm, and still more preferably 20 to 130 μm.

為了提高接著性，對於透明基材之表面可事先進行電暈放電處理、氧化處理等物理處理，此外，亦可事先塗佈被稱為增黏劑或底塗劑之塗料。 In order to improve adhesion, the surface of the transparent substrate can be treated with corona discharge treatment, oxidation treatment and other physical treatments in advance. In addition, coatings called tackifiers or primers can also be applied in advance.

透明基材較佳為延遲值超過0nm且未達3,000nm者，更佳為超過2.0nm且為2,000nm以下者。該延遲值係設為於波長550nm之值。 The transparent substrate preferably has a retardation value of more than 0 nm and less than 3,000 nm, more preferably more than 2.0 nm and less than 2,000 nm. The retardation value is set to a value at a wavelength of 550 nm.

透明基材之延遲值係藉由下述式，並藉由透明基材之面內折射率最大 之方向即遲相軸方向之折射率n_x、透明基材之面內與上述遲相軸方向正交之方向即進相軸方向之折射率n_y，及透明基材之厚度d所表示者，且係稱為所謂「面內延遲」者。 The retardation value of the transparent substrate is based on the following formula, and by the direction of the maximum refractive index in the transparent substrate, that is, the refractive index n _{x in} the direction of the late axis, the in-plane of the transparent substrate and the direction of the late axis _{The orthogonal direction is represented by the refractive index n y in} the direction of the advancing axis and the thickness d of the transparent substrate, and is referred to as the so-called "in-plane retardation".

延遲值(Re)=(n_x-n_y)×d Delay value (Re)=(n _x -n _y )×d

上述延遲值例如可藉由王子計測機器公司製造之商品名「KOBRA-WR」、「PAM-UHR100」進行測量。 The above-mentioned delay value can be measured by, for example, the product names "KOBRA-WR" and "PAM-UHR100" manufactured by Oji Measuring Instruments Co., Ltd.

通常於使用延遲值小之透明基材之情形時，觀察到透過該透明基材之光所產生之漸變色之色不均(例如，經由偏光太陽眼鏡辨認透過偏光板、具有特定延遲值之透明基材之光時被觀察到)。然而，實施形態A之觸控面板中所使用之光學片由於滿足條件(A2)，故而即便使用延遲值小之透明基材，亦可使該漸變色之色不均難以引人注目。 Generally, when a transparent substrate with a small retardation value is used, the color unevenness of the gradual color generated by the light passing through the transparent substrate is observed (for example, through polarized sunglasses, the transparent substrate with a specific retardation value is recognized Observed during the light of the substrate). However, since the optical sheet used in the touch panel of Embodiment A satisfies the condition (A2), even if a transparent substrate with a small retardation value is used, the color unevenness of the gradation color can be difficult to notice.

再者，即便使延遲值變小，亦可使漸變色之色不均難以引人注目之情況係關係到可使透明基材之基材厚度變薄。即，關於產生延遲之透明基材(例如作為通用基材之聚酯膜)，通常而言藉由進行使基材厚度變厚之單軸延伸等，而使延遲值變大，藉此抑制產生漸變色之色不均。然而，關於實施形態A之觸控面板中所使用之光學片，即便使透明基材(例如，作為通用基材之聚酯膜)之基材厚度變薄，亦可使漸變色之色不均難以引人注目。 Furthermore, even if the retardation value is reduced, the unevenness of the gradation color can be made less noticeable because of the fact that the thickness of the transparent substrate can be made thinner. That is, with regard to a transparent substrate (for example, a polyester film as a general-purpose substrate) that generates retardation, generally, the retardation value is increased by performing uniaxial stretching to increase the thickness of the substrate, thereby suppressing the generation The color of the gradient is uneven. However, regarding the optical sheet used in the touch panel of Embodiment A, even if the thickness of the transparent substrate (for example, polyester film as a general-purpose substrate) is made thinner, the gradation color may be uneven. It's hard to notice.

進而，即便使延遲值變小，亦可使漸變色之色不均難以引人注目之情況係關係到如下情況，即可使用通常因容易產生漸變色之色不均故而如在選擇餘地以外之塑膠膜(聚醯亞胺膜、聚芳醯胺膜)。聚醯亞胺膜、聚芳醯胺膜於耐可撓性優異之方面上較佳。 Furthermore, even if the retardation value is reduced, the uneven color of the gradation color can be difficult to be noticeable. The situation is related to the following conditions, and it can be used normally because the color unevenness of the gradation color is easy to occur, such as outside the choice. Plastic film (polyimide film, polyaramide film). The polyimide film and the polyaramide film are preferable in that they are excellent in flexibility resistance.

近年來，有顯示元件之色域擴大之傾向。色域廣之顯示元件係各色(R、 G、B)之分光光譜分別具有陡峭之形狀，關於此種顯示元件，有延遲值所特有之漸變色之色不均尤其容易引人注目之傾向。關於實施形態A之觸控面板中所使用之光學片，於即便對於色域廣之顯示元件，亦可使漸變色之色不均難以引人注目之方面上較佳。 In recent years, there has been a tendency for the color gamut of display devices to expand. Display elements with a wide color gamut are in various colors (R, The spectral spectra of G and B) each have a steep shape. For this type of display element, there is a tendency that the color unevenness of the gradation specific to the retardation value is particularly noticeable. Regarding the optical sheet used in the touch panel of the embodiment A, it is preferable in that even for a display element with a wide color gamut, the uneven color of the gradation color can be made less noticeable.

光學片亦可於凹凸之上及/或與凹凸之相反側之面上具有抗反射層、防污層、抗靜電層等功能性層。又，於透明基材上具有凹凸層之構成之情形時，除上述部位以外，亦可於透明基材與凹凸層之間具有功能性層。 The optical sheet may have functional layers such as an anti-reflection layer, an anti-fouling layer, and an anti-static layer on the surface of the unevenness and/or on the opposite side of the unevenness. In addition, in the case of a structure having a concavo-convex layer on a transparent substrate, in addition to the above-mentioned portions, a functional layer may be provided between the transparent substrate and the concavo-convex layer.

再者，於凹凸層之上積層有其他功能層之情形時，最表面之凹凸滿足本案範圍。凹凸只要最表面為本案範圍即可，可為單層亦可為複數層。 Furthermore, when other functional layers are laminated on the uneven layer, the unevenness on the outermost surface meets the scope of this application. The concavity and convexity may be a single layer or multiple layers as long as the outermost surface is within the scope of the present application.

實施形態A之觸控面板成為藉由上述光學片之凹凸形狀而賦予戶外防眩性，並且操作性優異者。又，亦可抑制解像度之降低。 The touch panel of Embodiment A provides outdoor anti-glare properties by the uneven shape of the above-mentioned optical sheet, and is excellent in operability. In addition, it is also possible to suppress the decrease in resolution.

因此，實施形態A之觸控面板尤佳被設置於車載用顯示裝置及電車等移動時所攜帶之智慧型手機或平板(多功能移動終端)之顯示元件的出射面側。 Therefore, the touch panel of Embodiment A is preferably installed on the exit surface side of the display element of a smartphone or tablet (multifunctional mobile terminal) carried when a car display device or a train is moving.

[顯示裝置] [Display device]

實施形態A之顯示裝置係於顯示元件之出射面側的最表面具有凹凸而成之顯示裝置，該凹凸滿足上述之條件(A1)及(A2)。 The display device of Embodiment A is a display device having unevenness on the outermost surface of the exit surface side of the display element, and the unevenness satisfies the above-mentioned conditions (A1) and (A2).

實施形態A之顯示裝置可使用與使用於上述之實施形態A之觸控面板之光學片相同者作為在最表面具有凹凸之構件。 The display device of the embodiment A can use the same optical sheet used in the touch panel of the above-mentioned embodiment A as a member having unevenness on the outermost surface.

作為顯示元件，可列舉：液晶顯示元件、內嵌式觸控面板液晶顯示元件、EL顯示元件、電漿顯示元件等。再者，液晶顯示元件係於液 晶元件之背面具有背光裝置。 As the display element, a liquid crystal display element, an in-cell touch panel liquid crystal display element, an EL display element, a plasma display element, etc. can be mentioned. Furthermore, the liquid crystal display element is The back of the crystal element has a backlight device.

內嵌式觸控面板液晶元件係於將液晶夾持於2片玻璃基板中而成之液晶元件之內部裝入有電阻膜式、靜電電容式、光學式等觸控面板功能者。再者，作為內嵌式觸控面板液晶元件之液晶之顯示方式，可列舉：IPS方式、VA方式、多疇方式、OCB方式、STN方式、TSTN方式等。內嵌式觸控面板液晶元件例如記載於日本專利特開2011-76602號公報、日本專利特開2011-222009號公報中。 The in-cell touch panel liquid crystal element is a liquid crystal element that is formed by sandwiching liquid crystal between two glass substrates and has a resistive film type, an electrostatic capacitance type, an optical type, and other touch panel functions. Furthermore, as the display method of the liquid crystal of the in-cell touch panel liquid crystal element, IPS method, VA method, multi-domain method, OCB method, STN method, TSTN method, etc. can be cited. The in-cell touch panel liquid crystal element is described in, for example, Japanese Patent Application Publication No. 2011-76602 and Japanese Patent Application Publication No. 2011-222009.

光學片例如可以下述之順序設置於顯示元件之出射面側。 The optical sheet can be arranged on the exit surface side of the display element in the following order, for example.

(a)顯示元件/表面保護板/光學片 (a) Display element/Surface protection board/Optical sheet

(b)顯示元件/光學片 (b) Display element/optical sheet

(c)於最上部具有顯示元件/光學片之觸控面板 (c) Touch panel with display element/optical sheet on the top

於(a)及(b)之情形時，可藉由以光學片之凹凸朝向與顯示元件相反側之方式進行配置，而對顯示裝置賦予戶外防眩性。又，可抑制顯示元件之解像度之降低，進而可使產生在表面或顯示元件上之傷痕難以看見。 In the cases of (a) and (b), the display device can be provided with outdoor anti-glare properties by arranging the concave and convex of the optical sheet toward the opposite side of the display element. In addition, the reduction of the resolution of the display element can be suppressed, and the scars generated on the surface or the display element can be made difficult to see.

於(c)之情形時，顯示裝置成為於顯示元件之出射面側具備於最上部具有光學片之觸控面板的附帶觸控面板之顯示裝置。於該情形時，可製成戶外防眩性、高解像性及觸控面板之操作性均優異之顯示裝置。 In the case of (c), the display device is a display device with a touch panel provided with a touch panel with an optical sheet on the uppermost part on the exit surface side of the display element. In this case, a display device with excellent outdoor anti-glare properties, high resolution, and operability of the touch panel can be made.

因此，實施形態A之顯示裝置係作為車載用顯示裝置、及電車等移動時所攜帶之智慧型手機或平板(多功能移動終端)較佳。 Therefore, the display device of Embodiment A is preferably used as an in-vehicle display device, a smart phone or a tablet (multifunctional mobile terminal) carried when traveling on a train, etc.

如上所述，關於實施形態A之顯示裝置中所使用之光學片，即便對於色域廣之顯示元件，亦可使漸變色之色不均難以引人注目。作為表示色域之標準，可列舉：「ITU-R勸告BT.2020(以下，稱為「BT.2020」)」 等。ITU-R係「International Telecommunication Union-Radiocommunication Sector(國際電信聯盟無線通信部門)」之簡稱，ITU-R勸告BT.2020係高清晰度電視之色域之國際標準。 As described above, regarding the optical sheet used in the display device of Embodiment A, even for a display element with a wide color gamut, the color unevenness of the gradation color can be made difficult to notice. As a standard for expressing the color gamut, one can include: "ITU-R Advice BT.2020 (hereinafter referred to as "BT.2020")" Wait. ITU-R is the abbreviation of "International Telecommunication Union-Radiocommunication Sector". ITU-R advises that BT.2020 is an international standard for the color gamut of high-definition television.

關於實施形態A之顯示裝置，即便對於基於下述式所表示之CIE-xy色度圖之BT.2020之覆蓋率為60%以上的顯示元件，亦可使漸變色之色不均難以引人注目。 Regarding the display device of Embodiment A, even for display elements with a coverage rate of 60% or more based on BT.2020 of the CIE-xy chromaticity diagram represented by the following formula, the uneven color of the gradation can be made difficult to attract Attention.

<表示BT.2020之覆蓋率之式>[顯示元件之CIE-xy色度圖之面積中，與BT.2020之CIE-xy色度圖之面積重複之面積/BT.2020之CIE-xy色度圖的面積」×100(%) <Expression of the coverage of BT.2020> [The area of the CIE-xy chromaticity diagram of the display device that overlaps with the area of the CIE-xy chromaticity diagram of BT.2020/CIE-xy color of BT.2020 The area of the degree map''×100(%)

再者，算出BT.2020之覆蓋率時所必需之「CIE-xy色度圖之面積」係分別測量紅色(R)顯示、綠色(G)顯示、及藍色(B)顯示時之CIE-Yxy表色系統的x值及y值，而可自根據該測量結果所獲得之「紅色(R)之頂點座標」、「綠色(G)之頂點座標」及「藍色(B)之頂點座標」算出。CIE-Yxy表色系統之x值及y值例如可利用柯尼卡美能達公司製造之分光放射亮度計CS-2000進行測量。 Furthermore, the "CIE-xy chromaticity diagram area" necessary to calculate the coverage of BT.2020 is to measure the CIE- with red (R) display, green (G) display, and blue (B) display. The x and y values of the Yxy color system can be obtained from the "red (R) vertex coordinates", "green (G) vertex coordinates" and "blue (B) vertex coordinates" obtained from the measurement results "Calculated. The x value and y value of the CIE-Yxy color system can be measured using, for example, a spectroradiometer CS-2000 manufactured by Konica Minolta.

作為色域廣之顯示元件，可列舉：三色獨立方式之有機EL顯示裝置(其中，具備微腔構造之三色獨立方式之有機EL元件)、背光裝置使用有量子點之液晶顯示元件、背光裝置使用有三波長方式之白色LED(近紫外線之LED、與藍色螢光體、綠色螢光體、及紅色螢光體之組合)之液晶顯示元件等。 Examples of display elements with a wide color gamut include: three-color independent organic EL display device (among them, three-color independent organic EL device with a microcavity structure), a liquid crystal display element with quantum dots used as a backlight, and a backlight The device uses three-wavelength white LED (near ultraviolet LED, a combination of blue phosphor, green phosphor, and red phosphor) liquid crystal display elements, etc.

[光學片] [Optical Sheet]

實施形態A之光學片於一面具有凹凸，該凹凸滿足上述條件(A1)及 (A2)。再者，實施形態A之光學片於在上述凹凸之上積層有其他功能層之情形時，最表面之凹凸滿足本案範圍。凹凸只要最表面為本案範圍即可，可為單層亦可為複數層。 The optical sheet of Embodiment A has unevenness on one side, and the unevenness satisfies the above-mentioned condition (A1) and (A2). Furthermore, in the optical sheet of Embodiment A, when other functional layers are laminated on the above-mentioned unevenness, the unevenness on the outermost surface satisfies the scope of the present application. The concavity and convexity may be a single layer or multiple layers as long as the outermost surface is within the scope of the present application.

作為實施形態A之光學片，可列舉：與上述之實施形態A之觸控面板所使用之光學片相同者。 As the optical sheet of Embodiment A, the same optical sheet used for the touch panel of the above-mentioned Embodiment A can be mentioned.

於將實施形態A之光學片用於觸控面板之情形時，該光學片係以具有凹凸之面成為觸控面板之操作者側之表面的方式進行設置。 When the optical sheet of Embodiment A is used for a touch panel, the optical sheet is installed in such a way that the surface with unevenness becomes the surface on the operator side of the touch panel.

實施形態A之光學片為了滿足上述條件(A1)及(A2)，而將該光學片設置於觸控面板之最上部，藉此可對觸控面板賦予戶外防眩性，並且使觸控面板之操作性變得優異。 In order to satisfy the above-mentioned conditions (A1) and (A2), the optical sheet of Embodiment A is placed on the uppermost part of the touch panel, thereby imparting outdoor anti-glare properties to the touch panel and making the touch panel The operability becomes excellent.

因此，實施形態A之光學片可較佳地用於車載用顯示裝置之表面、電車等移動時所攜帶之智慧型手機或平板(多功能移動終端)的表面。 Therefore, the optical sheet of Embodiment A can be preferably used on the surface of a display device for a vehicle, and the surface of a smartphone or tablet (multifunctional mobile terminal) carried when moving on a train, etc.

[光學片之篩選方法] [Screening method of optical film]

實施形態A之光學片之篩選方法係選定一面具有凹凸且該凹凸滿足上述條件(A1)及(A2)之光學片作為位於觸控面板最上部的光學片者。 The screening method of the optical sheet of the embodiment A is to select an optical sheet having unevenness on one side and the unevenness satisfying the above-mentioned conditions (A1) and (A2) as the optical sheet located on the uppermost part of the touch panel.

於實施形態A之光學片之篩選方法中，即便不進行光學片之操作性試驗，亦可篩選操作性良好，並且具有戶外防眩性及高解像性之光學片，而可高效率地進行光學片之製品設計、品質管理。 In the optical sheet screening method of Embodiment A, even if the operability test of the optical sheet is not performed, it is possible to screen optical sheets with good operability, outdoor anti-glare properties and high resolution, and can be performed efficiently Product design and quality management of optical films.

關於篩選觸控面板之光學片之判定條件，係將上述之條件(A1)及(A2)設為必須條件。條件(A1)之判定條件較佳滿足0.80≦μs₂₀/μs₁₀≦1.65，更佳滿足0.85≦μs₂₀/μs₁₀≦1.55。又，條件(A2)之判定條件較佳滿足0.15μm≦Ra_2.5≦0.60μm，更佳滿足0.25μm≦Ra_2.5≦0.55μm。 Regarding the judging conditions for screening the optical sheets of the touch panel, the above-mentioned conditions (A1) and (A2) are required. The determination condition of the condition (A1) preferably satisfies 0.80≦μs ₂₀ /μs ₁₀ ≦1.65, and more preferably satisfies 0.85≦μs ₂₀ /μs ₁₀ ≦1.55. In addition, the determination condition of the condition (A2) preferably satisfies 0.15 μm≦Ra _2.5 ≦0.60 μm, and more preferably satisfies 0.25 μm≦Ra _2.5 ≦0.55 μm.

關於觸控面板之光學片之篩選方法，就操作時之觸感及戶外防眩性之觀點而言，更佳將以下所列舉之條件(A3)~(A5)中之一項以上設為新增之判定條件，進而較佳將(A3)~(A5)全部設為新增之判定條件。 Regarding the selection method of the optical sheet of the touch panel, it is better to set one or more of the following conditions (A3) to (A5) as new from the viewpoints of touch during operation and outdoor anti-glare properties Add the judgment condition, and it is better to set all (A3)~(A5) as the newly added judgment condition.

5.7≦Rz_2.5/Ra_2.5 (A3) 5.7≦Rz _2.5 /Ra _2.5 (A3)

S_2.5≦70μm (A4) S _2.5 ≦70μm (A4)

0.10μm≦Rz_2.5-Rz_0.8≦1.50μm (A5) 0.10μm≦Rz _{2.5 -Rz 0.8} ≦1.50μm (A5)

條件(A3)~(A5)之判定條件較佳為上述實施形態A之光學片之較佳數值範圍。 The judgment conditions of the conditions (A3) to (A5) are preferably the preferable numerical range of the optical sheet of the above-mentioned embodiment A.

進而，較佳將其他參數設為新增之判定條件。 Furthermore, it is preferable to set other parameters as newly added judgment conditions.

<實施形態B> <Embodiment B>

[觸控面板] [Touch Panel]

實施形態B之觸控面板於操作者側之表面具有凹凸，上述凹凸滿足以下之條件(B1)及(B2)。 The touch panel of Embodiment B has unevenness on the surface of the operator side, and the unevenness satisfies the following conditions (B1) and (B2).

條件(B1)：使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於上述凹凸，對上述刮針施加垂直負載Tg，且同時使該刮針以5mm/秒之速度進行單程長度為10mm之往返1次，測量此時作用於上述刮針之靜摩擦係數μs及動摩擦係數μk。於以上述靜摩擦係數μs與上述動摩擦係數μk之比(μs/μk)為縱軸，以上述垂直負載Tg為橫軸繪製而成之圖中，將位於垂直負載100~1000g之範圍的曲線藉由最小平方法以一次直線近似時，該一次直線之斜率為負。 Condition (B1): A sapphire squeegee with a tip radius of 0.3mm is vertically in contact with the above-mentioned unevenness, a vertical load Tg is applied to the above-mentioned squeegee, and at the same time, the squeegee is made to perform a single pass length of 10mm at a speed of 5mm/sec. Go back and forth once, and measure the coefficient of static friction μs and the coefficient of dynamic friction μk acting on the above-mentioned scraper at this time. In the graph drawn with the ratio of the static friction coefficient μs to the dynamic friction coefficient μk (μs/μk) as the vertical axis and the vertical load Tg as the horizontal axis, the curve in the range of the vertical load 100~1000g is used as When the least square method is approximated by a straight line, the slope of the straight line is negative.

條件(B2)：上述凹凸將截止值設為2.5mm時之JIS B0601：1994的算 術平均粗糙度(Ra_2.5)為0.10μm以上0.60μm以下。 _{Condition (B2): The arithmetic average roughness (Ra 2.5} ) of JIS B0601:1994 when the cut-off value of the above-mentioned unevenness is 2.5 mm is 0.10 μm or more and 0.60 μm or less.

於實施形態B中，所謂「操作者側之表面」，係指操作者操作觸控面板時，實際接觸並操作之面。 In Embodiment B, the so-called "surface on the operator's side" refers to the surface that the operator actually touches and operates when operating the touch panel.

作為觸控面板，可列舉：靜電電容式觸控面板、電阻膜式觸控面板、光學式觸控面板、超音波式觸控面板及電磁感應式觸控面板等。該等觸控面板存在具有玻璃基材、塑膠膜基材等透明基材，於該透明基材上形成有用以賦予防眩性之凹凸的情形。實施形態B之觸控面板係例如於最上部具有下述之光學片作為此種於透明基材上具有凹凸之構件者。 Examples of touch panels include electrostatic capacitive touch panels, resistive film touch panels, optical touch panels, ultrasonic touch panels, electromagnetic induction touch panels, and the like. These touch panels may have a transparent substrate such as a glass substrate and a plastic film substrate, and the transparent substrate may have unevenness useful for imparting anti-glare properties. The touch panel of Embodiment B has, for example, the following optical sheet on the uppermost part as such a member having irregularities on a transparent substrate.

電阻膜式觸控面板1如圖1所示般，係未圖示之電路連接於以使具有導電膜12之上下一對透明基板11之導電膜12彼此對向的方式隔著間隔件13配置而成之基本構成而成者。於電阻膜式觸控面板之情形時，於實施形態B中，使用下述之光學片作為上部透明基板。藉由如上所述使用下述之光學片作為電阻膜式觸控面板之上部透明基板，可利用光學片之凹凸形狀而對觸控面板賦予戶外防眩性，並且使觸控面板之操作性變得優異。又，可抑制解像性之降低。 As shown in FIG. 1, the resistive film type touch panel 1 is connected to a circuit not shown in the figure so that the conductive film 12 of the next pair of transparent substrates 11 on the conductive film 12 faces each other and is arranged with spacers 13 interposed therebetween. The basic constituents of becoming. In the case of a resistive film type touch panel, in Embodiment B, the following optical sheet is used as the upper transparent substrate. By using the following optical sheet as the upper transparent substrate of the resistive film type touch panel as described above, the concave-convex shape of the optical sheet can be used to impart outdoor anti-glare properties to the touch panel and change the operability of the touch panel. It's excellent. In addition, the reduction in resolution can be suppressed.

再者，上述光學片亦可與上部透明基板一併用作下部透明基板。 Furthermore, the above-mentioned optical sheet can also be used as the lower transparent substrate together with the upper transparent substrate.

靜電電容式觸控面板可列舉表面型及投影型等，多使用投影型。投影型之靜電電容式觸控面板係將電路連接於將X軸電極、及與該X軸電極正交之Y軸電極隔著絕緣體配置而成的基本構成而成者。若更具體地說明該基本構成，則可列舉：於1片透明基板上之不同面形成X軸電極及Y軸電極之態樣；於1片透明基板上依序形成X軸電極、絕緣體層、Y軸電極之態樣；如圖2所示般，於1片透明基板21上形成X軸電極22，於 另一透明基板21上形成Y軸電極23，經由接著劑層24等進行積層之態樣等。又，可列舉於該等基本態樣中進而積層另一透明基板之態樣。 The capacitive touch panel includes a surface type and a projection type, and the projection type is often used. The projection type electrostatic capacitive touch panel is a basic structure in which an X-axis electrode and a Y-axis electrode orthogonal to the X-axis electrode are arranged with an insulator interposed between a circuit and a circuit. If the basic structure is explained more specifically, it can be exemplified: the X-axis electrode and the Y-axis electrode are formed on different sides of a transparent substrate; the X-axis electrode, the insulator layer, and the The state of the Y-axis electrode; as shown in Figure 2, the X-axis electrode 22 is formed on a transparent substrate 21, and The Y-axis electrode 23 is formed on the other transparent substrate 21, and the layer is laminated via the adhesive layer 24 and the like. In addition, it can be exemplified in these basic patterns and then laminated with another transparent substrate.

於靜電電容式觸控面板之情形時，於實施形態B中，使用下述之光學片作為最上部之透明基板。藉由如上所述將下述之光學片用於靜電電容式觸控面板之最上部的透明基板，可利用光學片之凹凸形狀而對觸控面板賦予戶外防眩性，並且使觸控面板之操作性變得優異。又，可抑制解像性之降低。 In the case of an electrostatic capacitive touch panel, in Embodiment B, the following optical sheet is used as the uppermost transparent substrate. By using the following optical sheet as the uppermost transparent substrate of an electrostatic capacitive touch panel as described above, the concave-convex shape of the optical sheet can be used to impart outdoor anti-glare properties to the touch panel and make the touch panel more effective. The operability becomes excellent. In addition, the reduction in resolution can be suppressed.

如上述之觸控面板例如用作設置於顯示元件上之表嵌式型觸控面板。 The above-mentioned touch panel is used, for example, as an in-cell type touch panel disposed on a display element.

(光學片) (Optical Sheet)

實施形態B之光學片係一面具有凹凸，該凹凸滿足上述條件(B1)及(B2)者。 The optical sheet of Embodiment B has unevenness on one surface, and the unevenness satisfies the above-mentioned conditions (B1) and (B2).

圖4係表示針對實施形態B之光學片之凹凸，將靜摩擦係數μs與動摩擦係數μk之比(μs/μk)設為縱軸，將垂直負載Tg設為橫軸而進行繪圖時，自處於垂直負載100~1000g之範圍的曲線藉由最小平方法所獲得之近似一次直線的圖表。如圖4所示般，實施形態B之光學片係上述近似一次直線之斜率為負，且隨著施加於光學片之凹凸的負載(垂直負載)變大，比(μs/μk)會變小。其係表示如下情況，即垂直負載變得越大，光學片之凹凸變得越容易變形，而凹凸之影響變得越小。 Fig. 4 shows the unevenness of the optical sheet of Embodiment B. When the ratio of static friction coefficient μs to dynamic friction coefficient μk (μs/μk) is set on the vertical axis, and the vertical load Tg is set on the horizontal axis, the plot is vertical. The curve of the load range of 100~1000g is approximated to a straight line graph obtained by the least square method. As shown in FIG. 4, the optical sheet of Embodiment B has a negative slope of the above-mentioned approximate linear straight line, and as the load (vertical load) applied to the unevenness of the optical sheet becomes larger, the ratio (μs/μk) becomes smaller . This means that the larger the vertical load becomes, the more easily the unevenness of the optical sheet becomes deformed, and the less the influence of the unevenness becomes.

進行在光學片上將手指進行方向轉換之操作、例如書寫文字，或繪製圖形時，大多在停止一瞬後再起動(例如於將手指之方向進行轉換時，通常停止手指之移動一瞬；又，移動放置手指之位置時亦會停止手指之移動一瞬)。於如上述般停止手指之移動一瞬後再起動時，容易受到 由靜摩擦係數μs與動摩擦係數μk之差產生之影響。 When performing operations that change the direction of the finger on the optical sheet, such as writing characters or drawing graphics, most of them stop for a moment and then start again (for example, when the direction of the finger is changed, the movement of the finger is usually stopped for a moment; also, move and place The movement of the finger will also stop for a moment when the finger is positioned). It’s easy to be The effect produced by the difference between the static friction coefficient μs and the dynamic friction coefficient μk.

於垂直負載小之情形時，若比(μs/μk)過小，則於光學片上手指容易滑動而變得難以進行方向轉換。又，於垂直負載大之情形時，若比(μs/μk)過大，則於光學片上將手指進行方向轉換時，手指受到高負荷而變得難以進行方向轉換。 When the vertical load is small, if the ratio (μs/μk) is too small, the finger will easily slide on the optical sheet and it will become difficult to change the direction. In addition, when the vertical load is large, if the ratio (μs/μk) is too large, when the finger is switched on the optical sheet, the finger receives a high load and it becomes difficult to switch the direction.

因此，為了於光學片上容易將手指進行方向轉換，而要求於垂直負載小之情形時，手指不會過度滑動而可獲得適度之阻抗感，並隨著垂直負載變大而抑制施加於手指之負荷。 Therefore, in order to easily change the direction of the finger on the optical sheet, it is required that when the vertical load is small, the finger will not slide excessively to obtain a moderate sense of impedance, and the load applied to the finger will be suppressed as the vertical load becomes larger. .

關於實施形態B之光學片，可藉由滿足上述之條件(B1)，而良好地進行於該光學片上將手指進行方向轉換等複雜之操作。 Regarding the optical sheet of Embodiment B, by satisfying the above-mentioned condition (B1), complicated operations such as changing the direction of a finger on the optical sheet can be performed well.

再者，作為負載不同之狀況，例如可列舉：在電車內站立而操作終端之狀況(此時之操作負載通常較輕)；於將終端置於桌子上並用單手固定之狀態下進行操作之狀況(此時之操作負載通常較重)。即，藉由滿足條件(B1)，而可於操作時之姿勢不同且操作負載不同之狀況下良好地進行方向轉換等複雜之操作。 Furthermore, as a situation where the load is different, for example, the situation in which the terminal is operated while standing in the tram (the operation load is usually light at this time); the operation is carried out while the terminal is placed on a table and fixed with one hand. Condition (the operating load at this time is usually heavier). That is, by satisfying the condition (B1), complicated operations such as direction conversion can be performed well under the conditions of different postures during operation and different operation loads.

再者，於實施形態B中，動摩擦係數μk意指全部測量時間之動摩擦係數之平均值。又，靜摩擦係數μs係設為自摩擦力0開始伴隨著測量時間之經過，成為動摩擦係數以上之最初摩擦力的峰值。 Furthermore, in the embodiment B, the coefficient of dynamic friction μk means the average value of the coefficient of dynamic friction over the entire measurement time. In addition, the static friction coefficient μs is assumed to be the peak value of the initial friction force above the dynamic friction coefficient with the elapse of the measurement time from the friction force 0.

靜摩擦係數μs及動摩擦係數μk可藉由摩擦磨耗試驗機(新東科學(股)製造，HEIDON NHS2000)進行測量。 The coefficient of static friction μs and the coefficient of dynamic friction μk can be measured by a friction and abrasion tester (manufactured by Shinto Science Co., Ltd., HEIDON NHS2000).

關於在垂直負載小之情形時、例如負載為50~150g時之比(μs/μk)，就不會過度滑動而獲得適度之阻抗感之觀點而言，較佳為1.58 ~2.50，更佳為1.70~2.20。又，關於在垂直負載大之情形時、例如負載為900~1100g時之比(μs/μk)，就抑制過度之負荷之觀點而言，較佳為1.00~1.50，更佳為1.10~1.40。 When the vertical load is small, for example, the ratio (μs/μk) when the load is 50~150g, from the viewpoint of obtaining a moderate sense of impedance without excessive sliding, it is preferably 1.58 ~2.50, more preferably 1.70~2.20. In addition, when the vertical load is large, for example, the ratio (μs/μk) when the load is 900 to 1100 g, from the viewpoint of suppressing excessive load, it is preferably 1.00 to 1.50, and more preferably 1.10 to 1.40.

又，於條件(B1)中，近似一次直線之斜率較佳為-10.0×10^-4~-4.5×10^-4，更佳為-8.5×10^-4~-6.0×10^-4。若為上述範圍內，則可使操作性變得更為良好。 Furthermore, in the condition (B1), the slope of the approximate linear straight line is preferably -10.0×10 ^-4 to -4.5×10 ^-4 , more preferably -8.5×10 ^-4 to -6.0×10 ^-4 . If it is in the above range, the operability can be improved.

又，於條件(B2)中，將截止值設為2.5mm。截止值係表示自由粗糙度成分(高頻成分)與波紋度成分(低頻成分)構成之截面剖面曲線截止將波紋度成分截斷之程度的值。換言之，截止值係表示自剖面曲線將波紋度成分(低頻成分)截斷之濾波器之細度的值。若截止值大，則濾波器較疏，因此波紋度成分中大波紋度成分被截斷，但小波紋度成分未被截斷。另一方面，若截止值小，則濾波器較密，因此波紋度成分基本上被截斷。於JIS B0601中所參照之JIS B0633中，在算術平均粗糙度Ra0.1~2μm時將截止值(基準長度)設為0.8mm。因此，根據JIS B0633，於上述條件(B2)之Ra之情形時，標準為將截止值(基準長度)設為0.8mm。 In addition, in the condition (B2), the cut-off value is 2.5 mm. The cut-off value is a value indicating the degree to which the cut-off of the cross-sectional profile formed by the free roughness component (high-frequency component) and the waviness component (low-frequency component) cuts off the waviness component. In other words, the cutoff value represents the fineness of the filter that cuts the waviness component (low frequency component) from the profile curve. If the cutoff value is large, the filter is sparse, so the large waviness component of the waviness component is truncated, but the small waviness component is not truncated. On the other hand, if the cutoff value is small, the filter is denser, so the waviness component is basically cut off. In JIS B0633 referred to in JIS B0601, the cut-off value (reference length) is set to 0.8mm when the arithmetic average roughness Ra is 0.1~2μm. Therefore, according to JIS B0633, in the case of Ra in the above condition (B2), the standard is to set the cut-off value (reference length) to 0.8 mm.

然而，關於操作時之觸感、戶外防眩性及解像性，不僅受粗糙度成分(高頻成分)影響，亦會受波紋度成分(低頻成分)影響，因此於將截止值(基準長度)設為0.8mm之情形時，有粗糙度曲線之波紋度成分(低頻成分)被截斷之程度變大，無法評價與戶外防眩性及解像性相比更容易受低頻成分之影響之操作時之觸感之虞。因此，於實施形態B中，將條件(B2)之截止值設為2.5mm。 However, the touch, outdoor anti-glare properties and resolution during operation are not only affected by roughness components (high frequency components), but also by waviness components (low frequency components). Therefore, the cutoff value (reference length When) is set to 0.8mm, the waviness component (low frequency component) of the roughness curve is cut to a greater degree, and it cannot be evaluated compared to outdoor anti-glare and resolution, which is more susceptible to low frequency components. The fear of the touch of time. Therefore, in the embodiment B, the cut-off value of the condition (B2) is set to 2.5 mm.

條件(B2)係算術平均粗糙度Ra_2.5為0.10μm以上0.60μm 以下。若Ra_2.5未達0.10μm，則光散射不足而防眩性降低。又，手指與光學片表面之接觸面積增加而觸感(滑動感)變差。若Ra_2.5超過0.60μm，則會損害操作時之滑動性，又，對比度及解像性降低。就操作時之觸感、戶外防眩性、及解像性之觀點而言，條件(B2)較佳滿足0.15μm≦Ra_2.5≦0.60μm，更佳滿足0.25μm≦Ra_2.5≦0.55μm，進而較佳滿足0.30μm≦Ra_2.5≦0.50μm。 The condition (B2) is that the arithmetic mean roughness Ra _2.5 is 0.10 μm or more and 0.60 μm or less. If Ra _{2.5 is} less than 0.10 μm, light scattering is insufficient and anti-glare properties are reduced. In addition, the contact area between the finger and the surface of the optical sheet increases and the tactile feel (slidability) deteriorates. If Ra _2.5 exceeds 0.60 μm, sliding properties during operation will be impaired, and contrast and resolution will decrease. In terms of touch during operation, outdoor anti-glare properties, and resolution, condition (B2) preferably satisfies 0.15μm≦Ra _2.5 ≦0.60μm, more preferably satisfies 0.25μm≦Ra _2.5 ≦0.55μm, and then Preferably, it satisfies 0.30 _{μm≦Ra 2.5} ≦0.50 μm.

又，若算術平均粗糙度Ra_2.5為0.10μm以上，則可使透明基材之延遲值所特有之漸變色之色不均難以引人注目。所謂延遲值所特有之漸變色之色不均，係透過具有延遲值之透明基材之光所產生之彩虹紋的色不均，此種色不均係例如於經由偏光太陽眼鏡辨認透過偏光板、具有特定延遲值之透明基材的光時被觀察到。 In addition, if the arithmetic average roughness Ra _2.5 is 0.10 μm or more, the color unevenness of the gradation peculiar to the retardation value of the transparent substrate can be made less noticeable. The so-called color unevenness of the gradual color peculiar to the retardation value is the color unevenness of the rainbow pattern produced by the light passing through the transparent substrate with the retardation value. Such color unevenness is recognized through the polarizing plate through polarized sunglasses, for example. , A transparent substrate with a specific retardation value is observed during light.

再者，藉由除上述條件(B2)外，亦滿足下述之條件(B3)，可變得更容易滿足上述之條件(B1)。尤其是於Ra_2.5較佳為0.25μm以上、更佳為0.30μm以上之情形時，對於例如色域廣之顯示元件，可使漸變色之色不均更為難以引人注目。 Furthermore, by satisfying the following condition (B3) in addition to the above condition (B2), it becomes easier to satisfy the above condition (B1). In particular, when Ra _{2.5 is} preferably 0.25 μm or more, and more preferably 0.30 μm or more, for example, a display element with a wide color gamut can make the color unevenness of the gradation color more difficult to notice.

又，上述凹凸較佳將截止值設為0.8mm時之JIS B0601：1994的十點平均粗糙度(Rz_0.8)、與將截止值設為2.5mm時之JIS B0601：1994的十點平均粗糙度(Rz_2.5)滿足以下之條件(B3)。 _{In addition, the above-mentioned unevenness preferably has a ten-point average roughness (Rz 0.8} ) of JIS B0601: 1994 when the cut-off value is 0.8 mm, and a ten-point average roughness of JIS B0601: 1994 when the cut-off value is 2.5 mm. (Rz _2.5 ) Meet the following condition (B3).

Rz_0.8/(Rz_2.5-Rz_0.8)≦3.2 (B3) Rz _0.8 /(Rz _2.5 -Rz _0.8 )≦3.2 (B3)

於將截止值設為0.8mm之情形時，與將截止值設為2.5mm之情形相比，粗糙度曲線之低頻成分被截斷之程度變大。即，Rz_0.8之值可視作光學片之凹凸中之高頻成分，(Rz_2.5-Rz_0.8)之值可視作光學片之凹凸中之 低頻成分。因此，條件(B3)之「Rz_0.8/(Rz_2.5-Rz_0.8)」可視作凹凸之高頻成分相對於低頻成分之比例。 When the cut-off value is set to 0.8mm, compared with the case where the cut-off value is set to 2.5mm, the low-frequency component of the roughness curve is cut to a greater extent. That is, _{the value of Rz 0.8} can be regarded as the high frequency component in the unevenness of the optical sheet, and the value of (Rz _{2.5- Rz 0.8} ) can be regarded as the low frequency component in the unevenness of the optical sheet. Therefore, the condition (B3) "Rz _0.8 /(Rz _{2.5- Rz 0.8} )" can be regarded as the ratio of the high-frequency components of the bumps to the low-frequency components.

於條件(B3)中，「Rz_0.8/(Rz_2.5-Rz_0.8)為3.2以下」意指高頻成分不會過多且具有一定量之低頻成分，因此於對凹凸施加力時，高頻成分之凹凸容易維持，另一方面，低頻成分之凹凸變得容易變形，而變得更容易滿足上述之條件(B1)。 In the condition (B3), "Rz _0.8 /(Rz _2.5 -Rz _0.8 ) is 3.2 or less" means that the high frequency components will not be excessive and have a certain amount of low frequency components. Therefore, when force is applied to the unevenness, the high frequency components Concavity and convexity are easy to maintain. On the other hand, the concavity and convexity of the low-frequency component becomes easy to deform, and it becomes easier to satisfy the above-mentioned condition (B1).

再者，增加凹凸之絕對量，亦變得容易滿足條件(B1)，但於該情形時，無法滿足條件(B2)。換言之，較佳藉由在滿足條件(B2)之凹凸的範圍內滿足條件(B3)，而變得滿足條件(B1)。 Furthermore, increasing the absolute amount of concavities and convexities also makes it easier to satisfy the condition (B1), but in this case, the condition (B2) cannot be satisfied. In other words, it is preferable to satisfy the condition (B1) by satisfying the condition (B3) within the range of the unevenness satisfying the condition (B2).

條件(B3)更佳滿足Rz_0.8/(Rz_2.5-Rz_0.8)≦3.0，進而較佳滿足Rz_0.8/(Rz_2.5-Rz_0.8)≦2.9。滿足Rz_0.8/(Rz_2.5-Rz_0.8)≦3.0亦關係到如下情況：對於例如色域廣之顯示元件，可使透明基材之延遲值所特有之漸變色之色不均更為難以引人注目。又，作為Rz_0.8/(Rz_2.5-Rz_0.8)之下限值，較佳為1.0以上，更佳為2.0以上，進而較佳為2.5以上。 The condition (B3) preferably satisfies Rz _0.8 /(Rz _2.5 -Rz _0.8 )≦3.0, and more preferably satisfies Rz _0.8 /(Rz _2.5 -Rz _0.8 )≦2.9. Satisfying Rz _0.8 /(Rz _2.5 -Rz _0.8 )≦3.0 is also related to the following situation: For example, for display elements with a wide color gamut, the color unevenness specific to the retardation value of the transparent substrate can be made more difficult to attract Attention. In addition, as the lower _{limit of Rz 0.8} /(Rz _{2.5 -Rz 0.8} ), it is preferably 1.0 or more, more preferably 2.0 or more, and still more preferably 2.5 or more.

又，上述凹凸較佳為上述之Rz_2.5與上述之Ra_2.5滿足以下之條件(B4)。 Furthermore, it is preferable that the above-mentioned unevenness is such that the above-mentioned Rz _2.5 and the above-mentioned Ra _2.5 satisfy the following condition (B4).

5.7≦Rz_2.5/Ra_2.5 (B4) 5.7≦Rz _2.5 /Ra _2.5 (B4)

所謂算術平均粗糙度Ra，係將評價長度之粗糙度曲線之峰與谷之各標高的絕對值進行積分並除以評價長度，以均等之標高之形式所求出之值。另一方面，所謂十點平均粗糙度Rz，係於將與截止值相等之取樣長度之N倍之評價長度的粗糙度曲線進行N等分，求出每個區間高度第1位至第5位之峰頂的平均標高與深度第1位至第5位之谷底的平均標高之 間隔Rz'時之N個Rz'的算術平均值。即，Ra係粗糙度曲線整體之標高之平均值，相對於此，Rz係著重於粗糙度曲線中較高之5處與較低之5處時之標高的平均值。因此，於粗糙度曲線不具有無規性之情形時，Ra與Rz大致相同，但於粗糙度曲線具有無規性之情形時，與Ra相比，Rz變大。因此，Rz/Ra成為表示粗糙度曲線之無規性之指標。 The so-called arithmetic average roughness Ra is the value obtained by integrating the absolute values of the elevations of the peaks and valleys of the roughness curve of the evaluation length and dividing by the evaluation length, in the form of an equal elevation. On the other hand, the so-called ten-point average roughness Rz is to divide the roughness curve of the evaluation length N times the sampling length equal to the cut-off value into N equal parts, and find the first to fifth heights of each interval The average elevation of the top of the peak and the average elevation of the bottom of the valley from the 1st to the 5th depth The arithmetic average of N Rz's at intervals of Rz'. That is, Ra is the average value of the elevation of the entire roughness curve, while Rz is the average value of the elevations at the 5 higher and 5 lower points in the roughness curve. Therefore, when the roughness curve does not have randomness, Ra and Rz are approximately the same, but when the roughness curve has randomness, Rz becomes larger than Ra. Therefore, Rz/Ra becomes an index indicating the randomness of the roughness curve.

若Rz_2.5/Ra_2.5為5.7以上，則粗糙度曲線之無規性提高，手指與光學片表面之接觸面積減少，而觸感變得良好。又，藉由提高粗糙度曲線之無規性，而有對於色域廣之顯示元件，可使漸變色之色不均更為難以引人注目之傾向。再者，就觸感(滑動感)及解像性之觀點而言，粗糙度較佳不使無規性過度。 If Rz _2.5 /Ra _2.5 is 5.7 or more, the randomness of the roughness curve is improved, the contact area between the finger and the surface of the optical sheet is reduced, and the tactility becomes better. In addition, by increasing the randomness of the roughness curve, there is a tendency that for display elements with a wide color gamut, the color unevenness of the gradual color can be made more difficult to notice. Furthermore, from the viewpoints of tactile feel (slidability) and resolution, it is preferable that the roughness does not cause excessive randomness.

條件(B4)更佳滿足6.0≦Rz_2.5/Ra_2.5≦10.0，進而較佳滿足6.5≦Rz_2.5/Ra_2.5≦9.5，進而更佳滿足7.0≦Rz_2.5/Ra_2.5≦9.0。 The condition (B4) is more preferably 6.0≦Rz _2.5 /Ra _2.5 ≦10.0, more preferably 6.5≦Rz _2.5 /Ra _2.5 ≦9.5, and still more preferably 7.0≦Rz _2.5 /Ra _2.5 ≦9.0.

上述凹凸之Rz_2.5較佳為0.50~4.30μm，更佳為1.00~4.00μm，進而較佳為2.00~4.00μm。若Rz_2.5為0.50μm以上，則變得容易滿足上述之條件(B1)，並且可對觸控面板賦予戶外防眩性，又，可使觸感(滑動感)變得更為良好。若Rz_2.5為4.30μm以下，則可抑制炫光之產生，又，不會損害操作時之滑動性。 _{The Rz 2.5 of} the concavity and convexity is preferably 0.50 to 4.30 μm, more preferably 1.00 to 4.00 μm, and still more preferably 2.00 to 4.00 μm. If Rz _2.5 is 0.50 μm or more, it becomes easier to satisfy the above-mentioned condition (B1), and outdoor anti-glare properties can be imparted to the touch panel, and the tactile feeling (slidability) can be improved. If Rz _2.5 is 4.30μm or less, the generation of glare can be suppressed, and the sliding property during operation will not be impaired.

再者，若Rz_2.5為2.00μm以上，則對於例如色域廣之顯示元件，可使透明基材之延遲值所特有之漸變色之色不均更為難以引人注目。 Furthermore, if Rz _2.5 is 2.00 μm or more, for example, for a display element with a wide color gamut, the color unevenness of the gradation peculiar to the retardation value of the transparent substrate can be made more difficult to notice.

又，上述凹凸較佳為將截止值設為2.5mm時之JIS B0601：1994之局部峰頂平均間隔(S_2.5)滿足以下之條件(B5)。 Moreover, it is preferable that the above-mentioned unevenness|corrugation should satisfy the following condition (B5) by the _{average interval (S 2.5} ) of the local peak top of JIS B0601:1994 when the cut-off value is set to 2.5 mm.

S_2.5≦70μm (B5) S _2.5 ≦70μm (B5)

若局部峰頂平均間隔(S_2.5)為70μm以下，則手指與光學片表面之接觸面積減少，而可使觸感(滑動感)變得良好。 If the average distance between local peak tops (S _2.5 ) is 70 μm or less, the contact area between the finger and the surface of the optical sheet is reduced, and the touch (slidability) can be improved.

條件(B5)更佳滿足S_2.5≦65μm，進而較佳滿足20μm≦S_2.5≦60μm，進而更佳滿足30μm≦S_2.5≦55μm。 The condition (B5) preferably satisfies S _2.5 ≦65 μm, more preferably satisfies 20 μm≦S _2.5 ≦60 μm, and more preferably satisfies 30 μm≦S _2.5 ≦55 μm.

進而，上述凹凸較佳將截止值設為2.5mm時之JIS B0601：1994的最大高度(Ry_2.5)滿足以下之條件。 _{Furthermore, it is preferable that the maximum height (Ry 2.5} ) of JIS B0601:1994 when the cutoff value is 2.5 mm for the above-mentioned concavities and convexities satisfies the following conditions.

0.60μm≦Ry_2.5≦5.0μm 0.60μm≦Ry _2.5 ≦5.0μm

若Ry_2.5為5.0μm以下，則可防止操作時手指之卡頓，而使操作性變得更為良好。又，可更為防止炫光之產生。若Ry_2.5為0.60μm以上，則可賦予戶外防眩性。 If Ry _2.5 is 5.0μm or less, it can prevent finger jam during operation, and make the operability better. In addition, the generation of glare can be prevented more. If Ry _2.5 is 0.60 μm or more, outdoor anti-glare properties can be imparted.

又，就容易滿足下述之條件(B6)及(B7)之觀點而言，Ry_2.5更佳為1.0μm以上且4.7μm以下，進而較佳為1.2μm以上且4.5μm以下。 Moreover, from the viewpoint of easily satisfying the following conditions (B6) and (B7), Ry _2.5 is more preferably 1.0 μm or more and 4.7 μm or less, and still more preferably 1.2 μm or more and 4.5 μm or less.

進而，上述凹凸較佳為上述(Ry_2.5)與上述之Rz_2.5滿足以下之條件(B6)。 Furthermore, it is preferable that the above-mentioned concavities and convexities are such that the above-mentioned (Ry _2.5 ) and the above-mentioned Rz _2.5 satisfy the following condition (B6).

Ry_2.5/Rz_2.5≦1.5 (B6) Ry _2.5 /Rz _2.5 ≦1.5 (B6)

若Ry_2.5/Rz_2.5為1.5以下，則可防止操作時手指之卡頓，而使操作性變得更為良好。又，可更為防止炫光之產生，而可容易賦予戶外防眩性。 If Ry _2.5 /Rz _2.5 is 1.5 or less, it can prevent finger jam during operation and make the operability better. In addition, the generation of glare can be more prevented, and outdoor anti-glare properties can be easily imparted.

Ry_2.5/Rz_2.5更佳為1.10以上且1.40以下，進而較佳為1.18以上且1.37以下。 Ry _2.5 /Rz _2.5 is more preferably 1.10 or more and 1.40 or less, and still more preferably 1.18 or more and 1.37 or less.

進而，上述凹凸較佳將截止值設為2.5mm時之凹凸的平均傾斜角(θa_2.5)滿足以下之條件。 _{Furthermore, it is preferable that the average inclination angle (θa 2.5} ) of the unevenness when the cutoff value is set to 2.5 mm for the unevenness described above satisfies the following conditions.

1.0°≦θa_2.5≦5.5° 1.0°≦θa _2.5 ≦5.5°

若θa_2.5為1.0°以上，則可對觸控面板賦予戶外防眩性，並且可使操作性變得更良好。若θa_2.5為5.5°以下，則可抑制對比度之降低，而謀求兼顧戶外防眩性與對比度。θa_2.5更佳滿足1.3°≦θa_2.5≦4.5°，進而較佳滿足2.0°≦θa_2.5≦4.0°。又，若θa_2.5為1.3°以上，則可使透明基材之延遲值所特有之漸變色之色不均難以引人注目。進而，若較佳為1.5°以上，更佳為2.0°以上，則對於例如色域廣之顯示元件，可使漸變色之色不均更為難以引人注目。 If θa _2.5 is 1.0° or more, outdoor anti-glare properties can be imparted to the touch panel, and operability can be improved. If θa _2.5 is 5.5° or less, the decrease in contrast can be suppressed, and the outdoor anti-glare property and contrast can be balanced. θa _2.5 preferably satisfies 1.3°≦θa _2.5 ≦4.5°, and further preferably satisfies 2.0°≦θa _2.5 ≦4.0°. In addition, if θa _2.5 is 1.3° or more, the color unevenness of the gradation peculiar to the retardation value of the transparent substrate can be made difficult to notice. Furthermore, if it is preferably 1.5° or more, and more preferably 2.0° or more, for example, a display element with a wide color gamut can make the color unevenness of the gradation color more difficult to notice.

此處，「平均傾斜角θa」係小阪研究所公司製造之表面粗糙度測量器(商品名：SE-3400)之操作說明書(1995.07.20修訂)所定義之值，如圖3所示般，可藉由存在於基準長度L中之凸部高度之和(h₁+h₂+h₃+‧‧‧+h_n)之反正切θa=tan^-1{(h₁+h₂+h₃+‧‧‧+h_n)/L}而求出。 Here, the "average inclination angle θa" is the value defined in the operation manual (1995.07.20 revision) of the surface roughness measuring instrument (trade name: SE-3400) manufactured by Kosaka Research Laboratory, as shown in Figure 3. may be present in the reference length L by the height of the convex portion and _{(h 1 + h 2 + h} 3 + ‧‧‧ + h n) of the arctangent _{^{θa = tan -1 {(h 1}} + h 2 + h 3 +‧‧‧+h _n )/L}.

又，θa可根據下述式(A)算出。 In addition, θa can be calculated according to the following formula (A).

[式(A)中，「L」表示基準長度，「dy/dx」表示粗糙度曲線之各單位區間之斜率]。 [In formula (A), "L" represents the reference length, and "dy/dx" represents the slope of each unit interval of the roughness curve].

再者，所謂「基準長度」，意指「截止值」。即，於截止值為0.8mm之情形時，基準長度為0.8mm。又，所謂單位測量區間，係用截止值除以取樣數所得之長度之區間。取樣數係設為1500。 Furthermore, the so-called "reference length" means "cut-off value". That is, when the cutoff value is 0.8 mm, the reference length is 0.8 mm. Also, the so-called unit measurement interval is the interval obtained by dividing the cut-off value by the number of samples. The sampling number is set to 1500.

進而，上述凹凸較佳為上述(θa_2.5)與上述Ry_2.5/Rz_2.5滿足以下之條件(B7)。 Furthermore, it is preferable that the unevenness described above (θa _2.5 ) and the above Ry _2.5 /Rz _2.5 satisfy the following condition (B7).

0.8≦θa_2.5/(Ry_2.5/Rz_2.5)≦5.0 (B7) 0.8≦θa _2.5 /(Ry _2.5 /Rz _2.5 )≦5.0 (B7)

若θa_2.5/(Ry_2.5/Rz_2.5)為上述範圍內，則成為具有適度無規性之凹凸， 而可使防眩性、解像性、操作時之觸感(滑動感)、及可使透明基材之延遲值所特有之漸變色之色不均難以引人注目的平衡性變得良好。 If θa _2.5 /(Ry _2.5 /Rz _2.5 ) is within the above-mentioned range, it becomes unevenness with moderate randomness, and can provide anti-glare properties, resolution, touch (slidability) during operation, and The color unevenness of the gradation that is unique to the retardation value of the transparent substrate is difficult to notice and the balance becomes good.

θa_2.5/(Ry_2.5/Rz_2.5)更佳為1.0以上且4.5以下，即便於色域廣之顯示元件之情形時，亦可使漸變色之色不均難以引人注目，因此進而較佳為1.2以上且4.0以下。 θa _2.5 /(Ry _2.5 /Rz _2.5 ) is more preferably 1.0 or more and 4.5 or less. Even in the case of a display element with a wide color gamut, the color unevenness of the gradation color can be made difficult to notice, so it is more preferably 1.2 or more and 4.0 or less.

進而，上述凹凸較佳為將截止值設為2.5mm時之JIS B0601：1994之凹凸的平均間隔(Sm_2.5)滿足以下的條件。 _{Furthermore, it is preferable that the above-mentioned unevenness|corrugation is the average interval (Sm 2.5} ) of unevenness|corrugation of JIS B0601: 1994 when the cut-off value is 2.5 mm, and satisfy|fills the following conditions.

Sm_2.5≦160μm Sm _2.5 ≦160μm

若Sm_2.5為160μm以下，則手指與光學片表面之接觸面積減少，而可使觸感(滑動感)變得更為良好。Sm_2.5更佳為150μm以下，進而較佳為145μm以下。又，下限值較佳為30μm以上，更佳為50μm以上，進而較佳為100μm以上。 If Sm _2.5 is 160 μm or less, the contact area between the finger and the surface of the optical sheet is reduced, and the touch (slidability) can be improved. Sm _{2.5 is more} preferably 150 μm or less, and still more preferably 145 μm or less. In addition, the lower limit is preferably 30 μm or more, more preferably 50 μm or more, and still more preferably 100 μm or more.

再者，Sm_2.5越小，而即便為高清顯示器，亦越可抑制炫光之產生。 Furthermore, the _{smaller the Sm 2.5} , even for high-definition displays, the more glare can be suppressed.

作為上述凹凸之形成方法，例如可列舉：(x1)壓紋、噴砂、蝕刻等物理或化學處理、(x2)利用模具之成型、(x3)利用塗佈之凹凸層之形成等。該等方法中，就凹凸形狀之再現性之觀點而言，較佳為(x2)利用模具之成型，就生產性及對應多品種之觀點而言，較佳為(x3)利用塗佈形成凹凸層。 As a method of forming the above-mentioned unevenness, for example, (x1) physical or chemical treatments such as embossing, sandblasting, and etching, (x2) molding with a mold, (x3) formation of an uneven layer by coating, and the like. Among these methods, from the viewpoint of the reproducibility of the concave-convex shape, (x2) molding using a mold is preferable, and from the viewpoint of productivity and a variety of products, it is preferable to (x3) forming concave-convex by coating Floor.

利用模具之成型可藉由製作由與凹凸互補之形狀構成之模具，使形成凹凸之材料流入至該模具中，然後自模具取出而形成。此處，若使用構成凹凸之材料作為該材料，使該材料流入至模具中後重疊透明基材，並將凹凸連同透明基材一起自模具取出，則可獲得透明基材上具有凹 凸之光學片。又，若使構成透明基材之材料流入至模具中後自模具取出，則可獲得由透明基材單層構成，且於該透明基材表面具有凹凸之光學片。 Molding using a mold can be formed by making a mold composed of a shape complementary to the unevenness, flowing the uneven-forming material into the mold, and then taking it out of the mold. Here, if the material constituting the concavities and convexities is used as the material, the material is poured into the mold and the transparent substrate is superimposed, and the concavities and convexities are taken out from the mold together with the transparent substrate, then the transparent substrate can be obtained. Convex optical sheet. In addition, if the material constituting the transparent substrate is poured into the mold and then taken out from the mold, an optical sheet composed of a single layer of the transparent substrate and having unevenness on the surface of the transparent substrate can be obtained.

於使用硬化性樹脂組成物(熱硬化性樹脂組成物或游離輻射硬化性樹脂組成物)作為流入至模具中之材料之情形時，較佳於自模具取出前使硬化性樹脂組成物硬化。 When a curable resin composition (thermosetting resin composition or ionizing radiation curable resin composition) is used as the material to be poured into the mold, it is preferable to harden the curable resin composition before taking it out of the mold.

就凹凸形狀之再現性優異之方面而言，較佳利用模具形成凹凸。 In terms of excellent reproducibility of the uneven shape, it is preferable to form the unevenness with a mold.

利用塗佈之凹凸層之形成可藉由將含有樹脂成分及粒子而成之凹凸層形成塗佈液利用凹版塗佈、棒式塗佈等公知之塗佈方法塗佈於透明基材上，並視需要進行乾燥、硬化而形成。為了使凹凸層滿足上述之條件(B1)及(B2)，較佳將凹凸層之膜厚、粒子之含量、及粒子之平均粒徑設為下述之範圍。 The concave-convex layer formed by coating can be formed by applying a coating solution for forming a concave-convex layer containing resin components and particles on a transparent substrate by a well-known coating method such as gravure coating and bar coating. It can be formed by drying and hardening as needed. In order for the uneven layer to satisfy the above-mentioned conditions (B1) and (B2), it is preferable to set the film thickness of the uneven layer, the content of particles, and the average particle diameter of the particles within the following ranges.

凹凸層之膜厚較佳為1.0~10μm，更佳為1.5~5μm，進而較佳為1.8~4μm。凹凸層之膜厚例如可根據使用穿透式電子顯微鏡(TEM)或掃描穿透式電子顯微鏡(STEM)所拍攝到之剖面之圖像測量20處的厚度，並根據20處之值之平均值而算出。TEM或STEM之加速電壓較佳設為1~5kV，倍率較佳設為1000~1萬倍。 The film thickness of the uneven layer is preferably 1.0 to 10 μm, more preferably 1.5 to 5 μm, and still more preferably 1.8 to 4 μm. The film thickness of the concave-convex layer can be measured at 20 locations based on the cross-sectional image taken by a transmission electron microscope (TEM) or a scanning transmission electron microscope (STEM), and the average value of the 20 locations And figure it out. The acceleration voltage of TEM or STEM is preferably set to 1 to 5 kV, and the magnification is preferably set to 1000 to 10,000 times.

粒子只要為可形成凹凸者，則可使用有機粒子及無機粒子中之任一種。作為有機粒子，可列舉：由聚甲基丙烯酸甲酯、聚丙烯酸-苯乙烯共聚物、三聚氰胺樹脂、聚碳酸酯、聚苯乙烯、聚氯乙烯、苯胍胺-三聚氰胺-甲醛縮合物、聚矽氧、氟系樹脂及聚酯系樹脂等構成之粒子。作為無機粒子，可列舉：由二氧化矽、氧化鋁、氧化鋯及氧化鈦等構成之粒子。該等粒子中，就分散控制之容易性之觀點而言，較佳為透光性有機 粒子、或二氧化矽粒子。 Any of organic particles and inorganic particles can be used as the particles as long as they can form irregularities. Examples of organic particles include: polymethylmethacrylate, polyacrylic-styrene copolymer, melamine resin, polycarbonate, polystyrene, polyvinyl chloride, benzoguanamine-melamine-formaldehyde condensate, polysilicon Particles composed of oxygen, fluorine-based resin, polyester-based resin, etc. Examples of inorganic particles include particles composed of silica, alumina, zirconia, and titanium oxide. Among these particles, from the viewpoint of ease of dispersion control, a light-transmitting organic Particles, or silica particles.

上述粒子可單獨使用1種，或組合材質或粒徑等不同之2種以上而使用。 The above-mentioned particles can be used singly or in combination of two or more different in material or particle size.

又，粒子較佳為凝集體。於凹凸層含有粒子之凝集體之情形時，於對凹凸層施加力時高頻成分之凹凸容易維持，另一方面，低頻成分之凹凸變得容易變形，而變得更容易滿足上述之條件(B1)。 In addition, the particles are preferably aggregates. When the concavo-convex layer contains agglomerates of particles, the concavity and convexity of the high-frequency component is easily maintained when force is applied to the concavo-convex layer. On the other hand, the concavity and convexity of the low-frequency component becomes easy to deform, and it becomes easier to satisfy the above conditions ( B1).

又，為了即便於色域廣之顯示元件之情形時，亦使漸變色之色不均難以引人注目，粒子較佳為具有可見光線之波長以上之粒徑之不定形粒子。藉由凹凸層含有不定形粒子，可抑制漸變色之色不均。 In addition, in order to make the color unevenness of the gradation color less noticeable even in the case of a display element with a wide color gamut, the particles are preferably amorphous particles having a particle size above the wavelength of visible light. Since the uneven layer contains irregular particles, the uneven color of the gradation can be suppressed.

粒子之含量較佳為形成凹凸層之全部固形物成分中之4~25質量%，更佳為5~20質量%，進而較佳為5~15質量%。 The content of the particles is preferably 4-25% by mass, more preferably 5-20% by mass, and still more preferably 5-15% by mass of the total solid components forming the uneven layer.

凹凸層中之粒子之平均粒徑由於視凹凸層之厚度而不同，故而無法一概而論，但就容易滿足上述之條件(B1)及(B2)之觀點而言，較佳為1.0~10.0μm，更佳為1.0~6.0μm，進而較佳為1.0~5.0μm。於粒子凝集之情形時，凝集粒子之平均粒徑較佳滿足上述範圍。 The average particle size of the particles in the uneven layer is different depending on the thickness of the uneven layer, so it cannot be generalized, but from the viewpoint of easily satisfying the above conditions (B1) and (B2), it is preferably 1.0~10.0μm, more It is preferably 1.0 to 6.0 μm, and more preferably 1.0 to 5.0 μm. In the case of agglomeration of particles, the average particle diameter of the agglomerated particles preferably satisfies the above-mentioned range.

粒子之平均粒徑可藉由以下之(y1)~(y3)之作業而算出。 The average particle size of the particles can be calculated by the following operations (y1) ~ (y3).

(y1)自使用穿透式電子顯微鏡(TEM)或掃描穿透式電子顯微鏡(STEM)所拍攝到之剖面之圖像中選擇觀察畫面中看起來最大的粒子。TEM或STEM之加速電壓較佳設為1~30kV，倍率較佳設為5000倍~30萬倍。 (y1) Select the largest particle in the observation frame from the cross-sectional images taken by the transmission electron microscope (TEM) or the scanning transmission electron microscope (STEM). The acceleration voltage of TEM or STEM is preferably set to 1-30 kV, and the magnification is preferably set to 5000 to 300,000 times.

(y2)自觀察圖像中抽選看起來最大徑之粒子，算出各粒子之粒徑。粒徑係以直線間距離之形式進行測量，該直線間距離係用任意平行之2條 直線夾住粒子之剖面時，如該2條直線間距離成為最大之2條直線之組合中之直線間距離。 (y2) Select the particles with the largest diameter from the observation image, and calculate the particle size of each particle. The particle size is measured in the form of the distance between the straight lines, and the distance between the straight lines is any two parallel lines. When a straight line clamps the cross section of the particle, the distance between the two straight lines becomes the distance between the straight lines in the combination of the largest two straight lines.

(y3)於相同樣品之另一畫面之觀察圖像中進行同樣之作業，將自合計20個量之粒徑之數量平均所獲得之值設為粒子的平均粒徑。 (y3) Perform the same operation on the observation image of another screen of the same sample, and set the value obtained from the number average of the total 20 particle diameters as the average particle diameter of the particles.

再者，於凝集粒子之情形時，將凝集塊之最大徑部分視作粒徑。 Furthermore, in the case of agglomerated particles, the largest diameter part of the agglomerated mass is regarded as the particle size.

就凹凸層容易滿足上述之條件(B1)及(B2)之觀點而言，凹凸層之膜厚較佳大於粒子之平均粒徑。又，更具體而言，[粒子之平均粒徑]/[凹凸層之膜厚]之比，較佳為0.20~0.99，更佳為0.50~0.90。 From the viewpoint that the uneven layer easily satisfies the aforementioned conditions (B1) and (B2), the film thickness of the uneven layer is preferably larger than the average particle diameter of the particles. Furthermore, more specifically, the ratio of [average particle diameter of particles]/[film thickness of uneven layer] is preferably 0.20 to 0.99, and more preferably 0.50 to 0.90.

粒子亦可為粒徑分佈廣者(單一粒子且粒徑分佈廣者、或者混合粒徑分佈不同之2種以上之粒子而成之混合粒子且粒徑分佈廣者)，就抑制炫光之觀點而言，較佳為粒徑分佈較窄者。 The particles can also be those with a wide particle size distribution (a single particle with a wide particle size distribution, or a mixed particle formed by mixing two or more particles with different particle size distributions and a wide particle size distribution), from the viewpoint of suppressing glare In general, those with a narrower particle size distribution are preferred.

凹凸層之樹脂成分較佳為包含熱硬化性樹脂組成物或游離輻射硬化性樹脂組成物，就使機械強度變得更為良好之觀點而言，更佳包含游離輻射硬化性樹脂組成物，其中，進而較佳包含紫外線硬化性樹脂組成物。 The resin component of the concavo-convex layer preferably contains a thermosetting resin composition or an ionizing radiation curable resin composition. From the viewpoint of improving mechanical strength, it is more preferable to contain an ionizing radiation curable resin composition. Furthermore, it is more preferable to include an ultraviolet curable resin composition.

熱硬化性樹脂組成物係至少包含熱硬化性樹脂之組成物，且係藉由加熱而硬化之樹脂組成物。 The thermosetting resin composition is a composition containing at least a thermosetting resin, and is a resin composition that is cured by heating.

作為熱硬化性樹脂，可列舉：丙烯酸樹脂、胺基甲酸酯樹脂、酚樹脂、脲三聚氰胺樹脂、環氧樹脂、不飽和聚酯樹脂、聚矽氧樹脂等。於熱硬化性樹脂組成物中，視需要向該等硬化性樹脂添加硬化劑。 Examples of thermosetting resins include acrylic resins, urethane resins, phenol resins, urea melamine resins, epoxy resins, unsaturated polyester resins, silicone resins, and the like. In the thermosetting resin composition, a curing agent is added to the curable resin as necessary.

游離輻射硬化性樹脂組成物係包含具有游離輻射硬化性官能基之化合物(以下，亦稱為「游離輻射硬化性化合物」)之組成物。作為 游離輻射硬化性官能基，可列舉：(甲基)丙烯醯基、乙烯基、烯丙基等乙烯性不飽和鍵結基、及環氧基、氧環丁烷基等。作為游離輻射硬化性化合物，較佳為具有乙烯性不飽和鍵結基之化合物，更佳為具有2個以上之乙烯性不飽和鍵結基之化合物，其中，進而較佳為具有2個以上之乙烯性不飽和鍵結基之多官能性(甲基)丙烯酸酯系化合物。作為多官能性(甲基)丙烯酸酯系化合物，單體及低聚物均可使用。 The ionizing radiation curable resin composition is a composition containing a compound having an ionizing radiation curable functional group (hereinafter, also referred to as "ionizing radiation curable compound"). As Examples of the ionizing radiation-curable functional group include ethylenically unsaturated bonding groups such as (meth)acryloyl groups, vinyl groups, and allyl groups, epoxy groups, and oxetane groups. The ionizing radiation curable compound is preferably a compound having an ethylenically unsaturated bond group, more preferably a compound having two or more ethylenically unsaturated bond groups, and among them, it is more preferably a compound having two or more ethylenically unsaturated bond groups. Multifunctional (meth)acrylate compound of ethylenically unsaturated bond group. As the polyfunctional (meth)acrylate compound, both monomers and oligomers can be used.

再者，所謂游離輻射，意指電磁波或帶電粒子束中具有可使分子聚合或交聯之能量量子者，通常可使用紫外線(UV)或電子束(EB)，此外，亦可使用X射線、γ射線等電磁波；α射線、離子束等帶電粒子束。 Furthermore, the so-called ionizing radiation refers to electromagnetic waves or charged particle beams that have energy quantum that can polymerize or crosslink molecules. Usually, ultraviolet (UV) or electron beam (EB) can be used. In addition, X-rays, Electromagnetic waves such as gamma rays; charged particle beams such as alpha rays and ion beams.

多官能性(甲基)丙烯酸酯系化合物中，作為2官能(甲基)丙烯酸酯系單體，可列舉：乙二醇二(甲基)丙烯酸酯、雙酚A四乙氧基二丙烯酸酯、雙酚A四丙氧基二丙烯酸酯、1,6-己二醇二丙烯酸酯、二環戊烯基二(甲基)丙烯酸酯、三乙二醇二丙烯酸酯、四乙二醇二(甲基)丙烯酸酯、三環癸烷二基二亞甲基二(甲基)丙烯酸酯、三(2-羥乙基)三聚異氰酸酯二(甲基)丙烯酸酯等。 Among the polyfunctional (meth)acrylate-based compounds, examples of bifunctional (meth)acrylate-based monomers include ethylene glycol di(meth)acrylate and bisphenol A tetraethoxy diacrylate , Bisphenol A tetrapropoxy diacrylate, 1,6-hexanediol diacrylate, dicyclopentenyl di(meth)acrylate, triethylene glycol diacrylate, tetraethylene glycol di( Meth) acrylate, tricyclodecanediyl dimethylene di(meth)acrylate, tris(2-hydroxyethyl) trimer isocyanate di(meth)acrylate, etc.

作為3官能以上之(甲基)丙烯酸酯系單體，例如可列舉：三羥甲基丙烷三(甲基)丙烯酸酯、三羥甲基乙烷三(甲基)丙烯酸酯、新戊四醇三(甲基)丙烯酸酯、新戊四醇四(甲基)丙烯酸酯、新戊四醇六(甲基)丙烯酸酯、二-三羥甲基丙烷四(甲基)丙烯酸酯、二新戊四醇六(甲基)丙烯酸酯、二新戊四醇五(甲基)丙烯酸酯、二新戊四醇四(甲基)丙烯酸酯、二-三羥甲基丙烷四(甲基)丙烯酸酯、三(2-羥乙基)三聚異氰酸酯三(甲基)丙烯酸酯等。 Examples of (meth)acrylate monomers having trifunctional or higher functions include trimethylolpropane tri(meth)acrylate, trimethylolethane tri(meth)acrylate, and neopentylerythritol Tris(meth)acrylate, neopentyl erythritol tetra(meth)acrylate, neopentyl erythritol hexa(meth)acrylate, di-trimethylolpropane tetra(meth)acrylate, dinepentyl Tetraol hexa (meth) acrylate, dineopentyl erythritol penta (meth) acrylate, dineopentaerythritol tetra (meth) acrylate, di-trimethylolpropane tetra (meth) acrylate , Tris (2-hydroxyethyl) trimeric isocyanate, tris (meth) acrylate, etc.

又，上述(甲基)丙烯酸酯系單體亦可為分子骨架之一部分經改質者，亦 可使用經環氧乙烷、環氧丙烷、己內酯、異三聚氰酸、烷基、環狀烷基、芳香族、雙酚等改質而成者。 In addition, the above-mentioned (meth)acrylate-based monomers may also be those in which part of the molecular skeleton has been modified. Those modified by ethylene oxide, propylene oxide, caprolactone, isocyanuric acid, alkyl, cyclic alkyl, aromatic, bisphenol, etc. can be used.

又，作為多官能性(甲基)丙烯酸酯系低聚物，可列舉：胺酯(甲基)丙烯酸酯、環氧(甲基)丙烯酸酯、聚酯(甲基)丙烯酸酯、聚醚(甲基)丙烯酸酯等丙烯酸酯系聚合物等。 In addition, examples of the polyfunctional (meth)acrylate oligomer include urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate, and polyether (meth)acrylate ( Acrylate-based polymers such as meth)acrylate.

胺酯(甲基)丙烯酸酯例如可藉由多元醇及有機二異氰酸酯與羥基(甲基)丙烯酸酯之反應而獲得。 The urethane (meth)acrylate can be obtained, for example, by the reaction of a polyol and an organic diisocyanate with a hydroxyl (meth)acrylate.

又，較佳之環氧(甲基)丙烯酸酯係使3官能以上之芳香族環氧樹脂、脂環族環氧樹脂、脂肪族環氧樹脂等與(甲基)丙烯酸進行反應而獲得之(甲基)丙烯酸酯；使2官能以上之芳香族環氧樹脂、脂環族環氧樹脂、脂肪族環氧樹脂等與多元酸及(甲基)丙烯酸進行反應而獲得之(甲基)丙烯酸酯；及使2官能以上之芳香族環氧樹脂、脂環族環氧樹脂、脂肪族環氧樹脂等與酚類及(甲基)丙烯酸進行反應而獲得之(甲基)丙烯酸酯。 In addition, the preferred epoxy (meth)acrylate is obtained by reacting a trifunctional or higher aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, etc. with (meth)acrylic acid (A Base) acrylate; (meth)acrylate obtained by reacting bifunctional or higher aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, etc., with polybasic acid and (meth)acrylic acid; And (meth)acrylate obtained by reacting bifunctional or higher aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, etc., with phenols and (meth)acrylic acid.

上述游離輻射硬化性化合物可單獨使用1種，或組合2種以上使用。 The above-mentioned ionizing radiation-curable compounds can be used singly or in combination of two or more kinds.

於游離輻射硬化性化合物為紫外線硬化性化合物之情形時，游離輻射硬化性組成物較佳包含光聚合起始劑或光聚合促進劑等添加劑。 When the ionizing radiation curable compound is an ultraviolet curable compound, the ionizing radiation curable composition preferably contains additives such as a photopolymerization initiator or a photopolymerization accelerator.

作為光聚合起始劑，可列舉：選自苯乙酮、二苯甲酮、α-羥基烷基苯酮、α-胺烷基苯酮、α-羥基酮、米其勒酮、安息香、二苯乙二酮甲基縮酮、苯甲醯基苯甲酸酯、α-醯基肟酯、醯基氧化膦類、9-氧硫

類等中之1種以上。 Examples of the photopolymerization initiator include: selected from the group consisting of acetophenone, benzophenone, α-hydroxyalkyl phenone, α-aminoalkyl phenone, α-hydroxy ketone, Michele ketone, benzoin, two Acetophenone methyl ketal, benzyl benzoate, α-acyl oxime ester, acyl phosphine oxides, 9-oxysulfur

One or more of the categories.

上述光聚合起始劑中，較佳為適當選擇雙(2,4,6-三甲基苯甲醯基)-苯 基氧化膦、寡(2-羥基-2-甲基-1-[4-(1-甲基乙烯基)苯基]丙酮、2-羥基-2-甲基-1-苯基-丙烷-1-酮、1-羥基-環己基-苯基-酮、及2-甲基-1-(4-甲基噻吩基)-2-N-

啉基丙烷-1-酮中之1種或複數種。 Among the above-mentioned photopolymerization initiators, it is preferable to appropriately select bis(2,4,6-trimethylbenzyl)-phenylphosphine oxide, oligo(2-hydroxy-2-methyl-1-[4 -(1-methylvinyl)phenyl)acetone, 2-hydroxy-2-methyl-1-phenyl-propane-1-one, 1-hydroxy-cyclohexyl-phenyl-ketone, and 2-methyl Base-1-(4-methylthienyl)-2-N-

One or more of the hydroxypropan-1-ones.

光聚合起始劑並不限定於上述化合物，只要有藉由紫外線而使之開始聚合之能力，則可為任意者。該等光聚合起始劑可單獨使用1種，或組合2種以上使用。 The photopolymerization initiator is not limited to the above-mentioned compound, and may be any one as long as it has the ability to initiate polymerization by ultraviolet rays. These photopolymerization initiators can be used individually by 1 type or in combination of 2 or more types.

游離輻射硬化性樹脂組成物中之光聚合起始劑之含量並無特別限制，較佳為相對於紫外線硬化性化合物之總量100質量份，於1~20質量份之範圍內使用。於使用複數種之情形時，較佳為將各自於上述範圍內使用。 The content of the photopolymerization initiator in the ionizing radiation curable resin composition is not particularly limited, and it is preferably used within the range of 1-20 parts by mass relative to 100 parts by mass of the total amount of the ultraviolet curable compound. In the case of using a plurality of types, it is preferable to use each within the above-mentioned range.

光聚合起始劑較佳為熔點為100℃以上。藉由將光聚合起始劑之熔點設為100℃以上，而因觸控面板之透明導電膜形成時或結晶化步驟之熱而殘留之光聚合起始劑昇華，從而可防止損害透明導電膜之低電阻化。 The photopolymerization initiator preferably has a melting point of 100°C or higher. By setting the melting point of the photopolymerization initiator to 100°C or higher, the photopolymerization initiator remaining due to the heat during the formation of the transparent conductive film of the touch panel or the heat of the crystallization step is sublimated, thereby preventing damage to the transparent conductive film The low resistance.

又，光聚合促進劑係可減輕硬化時之由空氣引起之聚合抑制而使硬化速度加快者，例如可列舉：選自對二甲胺基苯甲酸異戊酯、對二甲胺基苯甲酸乙酯等中之1種以上。 In addition, the photopolymerization accelerator can reduce the polymerization inhibition caused by air during curing and accelerate the curing speed. For example, it can be selected from the group consisting of isoamyl p-dimethylamino benzoate and ethyl p-dimethylamino benzoate. One or more of esters.

又，凹凸層形成塗佈液較佳含有調平劑。作為調平劑，例如可列舉：氟系調平劑、聚矽氧系調平劑、氟素聚矽氧共聚物系調平劑等。其中，就使凹凸層容易滿足上述條件(B1)及(B2)之觀點而言，可較佳地使用聚矽氧系調平劑。又，相比反應性者，非反應性者有觸控面板操作性良好之傾向。 In addition, the coating liquid for forming an uneven layer preferably contains a leveling agent. As the leveling agent, for example, a fluorine-based leveling agent, a silicone-based leveling agent, a fluorine-based polysiloxane copolymer-based leveling agent, and the like can be cited. Among them, from the viewpoint of making the uneven layer easily satisfy the aforementioned conditions (B1) and (B2), a silicone-based leveling agent can be preferably used. Moreover, compared with the reactive ones, the non-reactive ones tend to have better operability of the touch panel.

作為調平劑之添加量，較佳相對於凹凸層之全部固形物成分，為0.01 ~5.0重量%。 The amount of leveling agent added is preferably 0.01 relative to the total solid content of the uneven layer ~5.0% by weight.

光學片之凹凸較佳為進行防污處理而成。藉由實施防污處理，而可抑制污漬留在凹凸中而損害實施形態B之表面形狀。又，利用氟系脫模劑或聚矽氧系脫模劑等之防污處理在對凹凸賦予滑動性，容易滿足上述條件(B1)，而可使操作性變得更為良好之方面上較佳。 The unevenness of the optical sheet is preferably formed by anti-fouling treatment. By implementing the antifouling treatment, it is possible to prevent stains from remaining in the unevenness and impairing the surface shape of the embodiment B. In addition, antifouling treatment with fluorine-based mold release agents or silicone-based mold release agents provides slipperiness to irregularities, easily satisfies the above condition (B1), and can improve the operability. good.

作為防污處理之手段，可列舉：使凹凸層含有氟系脫模劑、聚矽氧系脫模劑等脫模劑之手段、於光學片之最表面藉由上述脫模劑形成脫模層之手段。於使凹凸層含有脫模劑之情形時，脫模劑之含量較佳設為凹凸層之全部固形物成分之0.5~5.0質量%。 Examples of anti-fouling treatment methods include: a method of making the uneven layer contain a fluorine-based mold release agent, a silicone-based mold release agent, and other mold release agents; The means. In the case where the uneven layer contains a release agent, the content of the release agent is preferably set to 0.5 to 5.0% by mass of the total solid components of the uneven layer.

(透明基材) (Transparent substrate)

作為光學片所使用之透明基材，較佳為具備透光性、平滑性、耐熱性，且機械強度優異者。作為此種透明基材，可列舉：聚酯、三乙醯纖維素(TAC)、二醋酸纖維素酯、醋酸丁酸纖維素、聚醯胺、聚醯亞胺、聚醚碸、聚碸、聚丙烯、聚甲基戊烯、聚氯乙烯、聚乙烯醇縮醛、聚醚酮、聚甲基丙烯酸甲酯、聚碳酸酯、聚胺基甲酸酯及非晶質烯烴(Cyclo-Olefin-Polymer：COP)等塑膠膜。透明基材亦可為貼合2片以上之塑膠膜而成者。 As the transparent substrate used in the optical sheet, one having light transmittance, smoothness, heat resistance, and excellent mechanical strength is preferred. Examples of such transparent substrates include: polyester, triacetyl cellulose (TAC), cellulose diacetate, cellulose acetate butyrate, polyamide, polyimide, polyether turbinate, polysulfide, Polypropylene, polymethylpentene, polyvinyl chloride, polyvinyl acetal, polyether ketone, polymethyl methacrylate, polycarbonate, polyurethane and amorphous olefins (Cyclo-Olefin- Polymer: COP) and other plastic films. The transparent substrate can also be formed by laminating two or more plastic films.

又，除藉由熔融擠製成形法：extrusion molding(吹脹法、T型模頭法)或溶液澆鑄法：solution casting、壓延法：calendaring等通用方法所製造之上述塑膠膜以外，亦可為於具有脫模性之基材上形成由游離輻射硬化型樹脂組成物等樹脂構成之塗膜，自該基材剝離該塗膜而製作之膜。 Moreover, in addition to the above-mentioned plastic film produced by general methods such as melt extrusion molding (inflation molding method, T-die method) or solution casting method: solution casting, calendaring method: calendaring, etc., it may also be A coating film made of a resin such as an ionizing radiation curable resin composition is formed on a substrate having mold releasability, and the coating film is peeled from the substrate to produce a film.

上述中，就機械強度或尺寸穩定性之觀點而言，較佳為經延伸加工、尤其是雙軸延伸加工之聚酯(聚對酞酸乙二酯、聚萘二甲酸乙二 酯)。又，COP、聚酯在耐候性優異之方面上較佳。 Among the above, from the viewpoint of mechanical strength or dimensional stability, the polyester (polyethylene terephthalate, polyethylene naphthalate ester). In addition, COP and polyester are preferable in that they are excellent in weather resistance.

透明基材之厚度較佳為5~300μm，更佳為10~200μm，進而較佳為20~130μm。 The thickness of the transparent substrate is preferably 5 to 300 μm, more preferably 10 to 200 μm, and still more preferably 20 to 130 μm.

為了提高接著性，對於透明基材之表面可事先進行電暈放電處理、氧化處理等物理處理，此外，亦可事先塗佈被稱為增黏劑或底塗劑之塗料。 In order to improve adhesion, the surface of the transparent substrate can be treated with corona discharge treatment, oxidation treatment and other physical treatments in advance. In addition, coatings called tackifiers or primers can also be applied in advance.

透明基材較佳為延遲值超過0nm且未達3,000nm者，更佳為超過20nm且2,000nm以下者。該延遲值係設為波長550nm下之值。 The transparent substrate preferably has a retardation value of more than 0 nm and less than 3,000 nm, more preferably more than 20 nm and less than 2,000 nm. The retardation value is set to a value at a wavelength of 550 nm.

透明基材之延遲值係藉由下述式，並藉由透明基材之面內折射率最大之方向即遲相軸方向之折射率n_x、透明基材之面內與上述遲相軸方向正交之方向即進相軸方向之折射率n_y、及透明基材之厚度d所表示者。 The retardation value of the transparent substrate is based on the following formula, and by the direction of the maximum refractive index in the transparent substrate, that is, the refractive index n _{x in} the direction of the late axis, the in-plane of the transparent substrate and the direction of the late axis _{The orthogonal direction is represented by the refractive index n y in} the direction of the advancing axis and the thickness d of the transparent substrate.

延遲值(Re)=(n_x-n_y)×d Delay value (Re)=(n _x -n _y )×d

上述延遲值例如可藉由王子計測機器公司製造之商品名「KOBRA-WR」、「PAM-UHR100」進行測量。 The above-mentioned delay value can be measured by, for example, the product names "KOBRA-WR" and "PAM-UHR100" manufactured by Oji Measuring Instruments Co., Ltd.

通常於使用延遲值小之透明基材之情形時，觀察到透過該透明基材之光所產生之漸變色之色不均(例如，經由偏光太陽眼鏡辨認透過偏光板、具有特定延遲值之透明基材之光時被觀察到)。然而，實施形態B之觸控面板中所使用之光學片由於滿足條件(B2)，故而即便使用延遲值小之透明基材，亦可使該漸變色之色不均難以引人注目。 Generally, when a transparent substrate with a small retardation value is used, the color unevenness of the gradual color generated by the light passing through the transparent substrate is observed (for example, through polarized sunglasses, the transparent substrate with a specific retardation value is recognized Observed during the light of the substrate). However, since the optical sheet used in the touch panel of Embodiment B satisfies the condition (B2), even if a transparent substrate with a small retardation value is used, the color unevenness of the gradation color can be made difficult to notice.

再者，即便使延遲值變小，亦可使漸變色之色不均難以引人注目之情況係關係到可使透明基材之基材厚度變薄。即，關於產生延遲之透明基材(例如作為通用基材之聚酯膜)，通常而言，藉由進行使基材厚度變厚之單軸延伸等，而使延遲值變大，藉此抑制產生漸變色之色不均。然而，關於 實施形態B之觸控面板中所使用之光學片，即便使透明基材(例如，作為通用基材之聚酯膜)之基材厚度變薄，亦可使漸變色之色不均難以引人注目。 Furthermore, even if the retardation value is reduced, the unevenness of the gradation color can be made less noticeable because of the fact that the thickness of the transparent substrate can be made thinner. That is, with regard to a transparent substrate (for example, a polyester film as a general-purpose substrate) that generates retardation, generally, the retardation value is increased by performing uniaxial stretching to increase the thickness of the substrate, thereby suppressing Uneven color resulting in gradation. However, about For the optical sheet used in the touch panel of Embodiment B, even if the thickness of the transparent substrate (for example, polyester film as a general substrate) is made thin, the uneven color of the gradation can be difficult to attract Attention.

進而，即便使延遲值變小，亦可使漸變色之色不均難以引人注目之情況係關係到如下情況，即可使用通常因容易產生漸變色之色不均故而如在選擇餘地以外之塑膠膜(聚醯亞胺膜、聚芳醯胺膜)。聚醯亞胺膜、聚芳醯胺膜於耐可撓性優異之方面上較佳。 Furthermore, even if the retardation value is reduced, the uneven color of the gradation color can be difficult to be noticeable. The situation is related to the following conditions, and it can be used normally because the color unevenness of the gradation color is easy to occur, such as outside the choice. Plastic film (polyimide film, polyaramide film). The polyimide film and the polyaramide film are preferable in that they are excellent in flexibility resistance.

近年來，有顯示元件之色域擴大之傾向。色域廣之顯示元件係各色(R、G、B)之分光光譜分別具有陡峭之形狀，關於此種顯示元件，有延遲值所特有之漸變色之色不均尤其容易引人注目之傾向。關於實施形態B之觸控面板中所使用之光學片，於即便對於色域廣之顯示元件，亦可使漸變色之色不均難以引人注目之方面上較佳。 In recent years, there has been a tendency for the color gamut of display devices to expand. A display element with a wide color gamut has a steep shape in the spectral spectra of each color (R, G, B). For this type of display element, the color unevenness of the gradation specific to the retardation value tends to be particularly noticeable. Regarding the optical sheet used in the touch panel of Embodiment B, it is preferable in that even for a display element with a wide color gamut, the uneven color of the gradation color can be made less noticeable.

光學片亦可於凹凸之上及/或與凹凸之相反側之面上具有抗反射層、防污層、抗靜電層等功能性層。又，於透明基材上具有凹凸層之構成之情形時，除上述部位以外，亦可於透明基材與凹凸層之間具有功能性層。 The optical sheet may have functional layers such as an anti-reflection layer, an anti-fouling layer, and an anti-static layer on the surface of the unevenness and/or on the opposite side of the unevenness. In addition, in the case of a structure having a concavo-convex layer on a transparent substrate, in addition to the above-mentioned portions, a functional layer may be provided between the transparent substrate and the concavo-convex layer.

再者，於凹凸層之上積層有其他功能層之情形時，最表面之凹凸滿足本案範圍。凹凸只要最表面為本案範圍即可，可為單層亦可為複數層。 Furthermore, when other functional layers are laminated on the uneven layer, the unevenness on the outermost surface meets the scope of this application. The concavity and convexity may be a single layer or multiple layers as long as the outermost surface is within the scope of the present application.

實施形態B之觸控面板成為藉由上述光學片之凹凸形狀而賦予戶外防眩性，並且操作性優異者。又，亦可抑制解像度之降低。 The touch panel of Embodiment B provides outdoor anti-glare properties by the uneven shape of the above-mentioned optical sheet, and is excellent in operability. In addition, it is also possible to suppress the decrease in resolution.

因此，實施形態B之觸控面板係尤佳地設置於車載用顯示裝置、及電車等移動時所攜帶之智慧型手機或平板(多功能移動終端)之顯示元件的 出射面側。 Therefore, the touch panel of Embodiment B is preferably installed in the display device of a mobile phone or tablet (multifunctional mobile terminal) carried on a car such as a display device for a car and a train. The exit surface side.

[顯示裝置] [Display device]

實施形態B之顯示裝置係於顯示元件之出射面側的最表面具有凹凸，該凹凸滿足上述之條件(B1)及(B2)者。 The display device of Embodiment B has unevenness on the outermost surface of the exit surface side of the display element, and the unevenness satisfies the above-mentioned conditions (B1) and (B2).

實施形態B之顯示裝置可使用與上述之實施形態B之觸控面板所使用之光學片相同者作為在最表面具有凹凸之構件。 The display device of the embodiment B can use the same optical sheet as that used in the touch panel of the above-mentioned embodiment B as a member having unevenness on the outermost surface.

作為顯示元件，可列舉：液晶顯示元件、內嵌式觸控面板液晶顯示元件、EL顯示元件、電漿顯示元件等。再者，液晶顯示元件係於液晶元件之背面具有背光裝置。 As the display element, a liquid crystal display element, an in-cell touch panel liquid crystal display element, an EL display element, a plasma display element, etc. can be mentioned. Furthermore, the liquid crystal display element has a backlight device on the back of the liquid crystal element.

內嵌式觸控面板液晶元件係於將液晶夾持於2片玻璃基板中而成之液晶元件之內部裝入有電阻膜式、靜電電容式、光學式等觸控面板功能者。再者，作為內嵌式觸控面板液晶元件之液晶之顯示方式，可列舉：IPS方式、VA方式、多疇方式、OCB方式、STN方式、TSTN方式等。內嵌式觸控面板液晶元件例如記載於日本專利特開2011-76602號公報、日本專利特開2011-222009號公報中。 The in-cell touch panel liquid crystal element is a liquid crystal element that is formed by sandwiching liquid crystal between two glass substrates and has a resistive film type, an electrostatic capacitance type, an optical type, and other touch panel functions. Furthermore, as the display method of the liquid crystal of the in-cell touch panel liquid crystal element, IPS method, VA method, multi-domain method, OCB method, STN method, TSTN method, etc. can be cited. The in-cell touch panel liquid crystal element is described in, for example, Japanese Patent Application Publication No. 2011-76602 and Japanese Patent Application Publication No. 2011-222009.

光學片例如可以下述之順序設置於顯示元件之出射面側。 The optical sheet can be arranged on the exit surface side of the display element in the following order, for example.

(a)顯示元件/表面保護板/光學片 (a) Display element/Surface protection board/Optical sheet

(b)顯示元件/光學片 (b) Display element/optical sheet

(c)於最上部具有顯示元件/光學片之觸控面板 (c) Touch panel with display element/optical sheet on the top

於(a)及(b)之情形時，可藉由以光學片之凹凸朝向與顯示元件相反側之方式進行配置，而對顯示裝置賦予戶外防眩性。又，可抑制顯示元件之解像度之降低，進而可使產生在表面或顯示元件上之傷痕難以看見。 In the cases of (a) and (b), the display device can be provided with outdoor anti-glare properties by arranging the concave and convex of the optical sheet toward the opposite side of the display element. In addition, the reduction of the resolution of the display element can be suppressed, and the scars generated on the surface or the display element can be made difficult to see.

於(c)之情形時，顯示裝置成為於顯示元件之出射面側具備於最上部具有光學片之觸控面板的附帶觸控面板之顯示裝置。於該情形時，可製成戶外防眩性、高解像性及觸控面板之操作性均優異之顯示裝置。 In the case of (c), the display device is a display device with a touch panel provided with a touch panel with an optical sheet on the uppermost part on the exit surface side of the display element. In this case, a display device with excellent outdoor anti-glare properties, high resolution, and operability of the touch panel can be made.

因此，實施形態B之顯示裝置係作為車載用顯示裝置、及電車等移動時所攜帶之智慧型手機或平板(多功能移動終端)較佳。 Therefore, the display device of Embodiment B is preferably used as an in-vehicle display device, a smart phone or a tablet (multifunctional mobile terminal) carried when traveling on a train, etc.

如上所述，關於實施形態B之顯示裝置中所使用之光學片，即便對於色域廣之顯示元件，亦可使漸變色之色不均難以引人注目。作為表示色域之標準，可列舉：「ITU-R勸告BT.2020(以下，稱為「BT.2020」)」等。ITU-R係「International Telecommunication Union-Radiocommunication Sector(國際電信聯盟無線通信部門)」之簡稱，ITU-R勸告BT.2020係高清晰度電視之色域之國際標準。 As described above, regarding the optical sheet used in the display device of Embodiment B, even for a display element with a wide color gamut, the color unevenness of the gradation color can be made difficult to notice. As a standard for representing the color gamut, "ITU-R Recommendation BT.2020 (hereinafter referred to as "BT.2020")" and the like can be cited. ITU-R is the abbreviation of "International Telecommunication Union-Radiocommunication Sector". ITU-R advises that BT.2020 is an international standard for the color gamut of high-definition television.

關於實施形態B之顯示裝置，即便對於基於下述式所表示之CIE-xy色度圖之BT.2020之覆蓋率為60%以上的顯示元件，亦可使漸變色之色不均難以引人注目。 Regarding the display device of Embodiment B, even for a display element with a coverage rate of 60% or more based on BT.2020 of the CIE-xy chromaticity diagram represented by the following formula, the uneven color of the gradation can be made difficult to attract Attention.

<表示BT.2020之覆蓋率之式>[顯示元件之CIE-xy色度圖之面積中，與BT.2020之CIE-xy色度圖之面積重複之面積/BT.2020之CIE-xy色度圖的面積]×100(%) <Expression of the coverage of BT.2020> [The area of the CIE-xy chromaticity diagram of the display device that overlaps with the area of the CIE-xy chromaticity diagram of BT.2020/CIE-xy color of BT.2020 The area of the degree map]×100(%)

再者，算出BT.2020之覆蓋率時所必需之「CIE-xy色度圖之面積」係分別測量紅色(R)顯示、綠色(G)顯示、及藍色(B)顯示時之CIE-Yxy表色系統的x值及y值，而可自根據該測量結果所獲得之「紅色(R)之頂點座標」、「綠色(G)之頂點座標」及「藍色(B)之頂點座標」算出。CIE-Yxy表色系統之x值及y值例如可利用柯尼卡美能達公司 製造之分光放射亮度計CS-2000進行測量。 Furthermore, the "CIE-xy chromaticity diagram area" necessary to calculate the coverage of BT.2020 is to measure the CIE- with red (R) display, green (G) display, and blue (B) display. The x and y values of the Yxy color system can be obtained from the "red (R) vertex coordinates", "green (G) vertex coordinates" and "blue (B) vertex coordinates" obtained from the measurement results "Calculated. The x value and y value of the CIE-Yxy color system can be used, for example, by Konica Minolta The manufactured spectroradiometer CS-2000 was used for measurement.

作為色域廣之顯示元件，可列舉：三色獨立方式之有機EL顯示裝置(其中，具備微腔構造之三色獨立方式之有機EL元件)、背光裝置使用有量子點之液晶顯示元件、背光裝置使用有三波長方式之白色LED(近紫外線之LED、與藍色螢光體、綠色螢光體、及紅色螢光體之組合)之液晶顯示元件等。 Examples of display elements with a wide color gamut include: three-color independent organic EL display device (among them, three-color independent organic EL device with a microcavity structure), a liquid crystal display element with quantum dots used as a backlight, and a backlight The device uses three-wavelength white LED (near ultraviolet LED, a combination of blue phosphor, green phosphor, and red phosphor) liquid crystal display elements, etc.

[光學片] [Optical Sheet]

實施形態B之光學片於一面具有凹凸，該凹凸滿足上述條件(B1)及(B2)。再者，實施形態B之光學片於在上述凹凸之上積層有其他功能層之情形時，最表面之凹凸滿足本案範圍。凹凸只要最表面為本案範圍即可，可為單層亦可為複數層。 The optical sheet of Embodiment B has concavities and convexities on one surface, and the concavities and convexities satisfy the above-mentioned conditions (B1) and (B2). Furthermore, in the optical sheet of Embodiment B, when other functional layers are laminated on the above-mentioned concavities and convexities, the concavities and convexities on the outermost surface satisfy the scope of the present application. The concavity and convexity may be a single layer or multiple layers as long as the outermost surface is within the scope of the present application.

作為實施形態B之光學片，可列舉：與上述之實施形態B之觸控面板所使用之光學片相同者。 As an optical sheet of Embodiment B, the same optical sheet used for the touch panel of the above-mentioned Embodiment B can be mentioned.

於將實施形態B之光學片用於觸控面板之情形時，該光學片係以具有凹凸之面成為觸控面板之操作者側之表面的方式進行設置。 When the optical sheet of Embodiment B is used for a touch panel, the optical sheet is installed in such a way that the surface with unevenness becomes the surface on the operator side of the touch panel.

實施形態B之光學片為了滿足上述條件(B1)及(B2)，而將該光學片設置於觸控面板之最上部，藉此可對觸控面板賦予戶外防眩性，並且使觸控面板之操作性變得優異。 In order to satisfy the above-mentioned conditions (B1) and (B2), the optical sheet of Embodiment B is placed on the uppermost part of the touch panel, thereby imparting outdoor anti-glare properties to the touch panel and making the touch panel The operability becomes excellent.

因此，實施形態B之光學片可較佳地用於車載用顯示裝置之表面、電車等移動時所攜帶之智慧型手機或平板(多功能移動終端)的表面。 Therefore, the optical sheet of Embodiment B can be preferably used on the surface of a vehicle-mounted display device, and the surface of a smartphone or tablet (multifunctional mobile terminal) carried when moving on a train, etc.

[光學片之篩選方法] [Screening method of optical film]

實施形態B之光學片之篩選方法係選定一面具有凹凸，該凹凸滿足上 述條件(B1)及(B2)之光學片作為位於觸控面板之最上部的光學片者。 The screening method of the optical sheet of embodiment B is to select one surface with unevenness, and the unevenness meets the above The optical sheets of the conditions (B1) and (B2) are regarded as the optical sheets located on the uppermost part of the touch panel.

於實施形態B之光學片之篩選方法中，即便不進行光學片之操作性試驗，亦可篩選操作性良好，並且具有戶外防眩性及高解像性之光學片，而可高效率地進行光學片之製品設計、品質管理。 In the optical sheet screening method of Embodiment B, even if the optical sheet operability test is not performed, it is possible to screen optical sheets with good operability, outdoor anti-glare properties and high resolution, and can be performed efficiently Product design and quality management of optical films.

關於篩選觸控面板之光學片之判定條件，係將上述之條件(B1)及(B2)設為必須條件。關於條件(B1)之判定條件，例如負載為50~150g時之比(μs/μk)較佳為1.6~2.5之範圍內，更佳為1.7~2.2之範圍內。又，負載為900~1100g時之比(μs/μk)較佳為1.0~1.5之範圍內，更佳為1.1~1.4之範圍內。又，條件(B2)之判定條件較佳滿足0.15μm≦Ra_2.5≦0.60μm，更佳滿足0.25μm≦Ra_2.5≦0.55μm，進而較佳滿足0.30μm≦Ra_2.5≦0.50μm。 Regarding the judging conditions for screening the optical sheets of the touch panel, the above-mentioned conditions (B1) and (B2) are set as necessary conditions. Regarding the judgment condition of the condition (B1), for example, the ratio (μs/μk) when the load is 50 to 150 g is preferably in the range of 1.6 to 2.5, and more preferably in the range of 1.7 to 2.2. In addition, the ratio (μs/μk) when the load is 900 to 1100 g is preferably in the range of 1.0 to 1.5, and more preferably in the range of 1.1 to 1.4. In addition, the determination condition of the condition (B2) preferably satisfies 0.15 μm≦Ra _2.5 ≦0.60 μm, more preferably satisfies 0.25 μm≦Ra _2.5 ≦0.55 μm, and more preferably satisfies 0.30 _{μm≦Ra 2.5} ≦0.50 μm.

關於觸控面板之光學片之篩選方法，就優異之操作性及戶外防眩性之觀點而言，進而較佳將以下之條件(B3)設為新增之判定條件。 Regarding the selection method of the optical sheet of the touch panel, from the viewpoint of excellent operability and outdoor anti-glare properties, it is further preferable to set the following condition (B3) as a newly added judgment condition.

Rz_0.8/(Rz_2.5-Rz_0.8)≦3.2 (B3) Rz _0.8 /(Rz _2.5 -Rz _0.8 )≦3.2 (B3)

條件(B3)之判定條件較佳為上述之實施形態B之光學片之較佳數值範圍。 The judgment condition of the condition (B3) is preferably the preferable numerical range of the optical sheet of the above-mentioned embodiment B.

進而，較佳將其他參數設為新增之判定條件。 Furthermore, it is preferable to set other parameters as newly added judgment conditions.

[實施例] [Example]

以下，列舉實施例及比較例而對本發明具體地進行說明，但本發明並不限定於實施例所記載之形態。再者，「份」及「%」只要未特別地事先說明，則設為質量標準。 Hereinafter, the present invention will be specifically described with examples and comparative examples, but the present invention is not limited to the form described in the examples. Furthermore, "parts" and "%" are set as quality standards as long as they are not specifically stated in advance.

<實施形態A之實施例> <Example of Embodiment A>

A1.測量及評價 A1. Measurement and evaluation

針對實施例及比較例中所製作之光學片，進行以下之測量及評價。將結果示於表1。 With respect to the optical sheets produced in the examples and comparative examples, the following measurements and evaluations were performed. The results are shown in Table 1.

A1-1.靜摩擦係數 A1-1. Static friction coefficient

使用新東科學(股)製造之HEIDON HHS2000，於一定負載往返摩擦測量模式下藉由以下之方法測量靜摩擦係數。 Using HEIDON HHS2000 manufactured by Shinto Science Co., Ltd., the static friction coefficient is measured by the following method under a certain load reciprocating friction measurement mode.

使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於光學片之凹凸，對刮針施加垂直負載100g，且同時使該刮針以10mm/秒之掃描速度進行單程長度為10mm之往返1次，對此時作為於該刮針之靜摩擦係數(μs10)進行測量。又，對將掃描速度設為20mm/秒時之靜摩擦係數(μs₂₀)進行測量。 A sapphire needle with a tip radius of 0.3mm is vertically in contact with the unevenness of the optical sheet, a vertical load of 100g is applied to the needle, and at the same time, the squeegee is made to perform one round trip with a length of 10mm at a scanning speed of 10mm/sec. At this time, it was measured as the static friction coefficient (μs10) of the scraper. _{In addition, the static friction coefficient (μs 20} ) when the scanning speed was set to 20 mm/sec was measured.

再者，測量時之氛圍係設為溫度23℃±5℃、濕度50%±10%。又，於測量開始前，將各樣品放置於23℃±5℃、濕度50%±10%之氛圍中10分鐘以上。 Furthermore, the atmosphere at the time of measurement is set to a temperature of 23°C±5°C and a humidity of 50%±10%. Also, before the start of the measurement, place each sample in an atmosphere of 23°C±5°C and a humidity of 50%±10% for more than 10 minutes.

A1-2.表面粗糙度測量(截止值2.5mm) A1-2. Surface roughness measurement (cut-off value 2.5mm)

將實施例及比較例之光學片切割成10cm見方。切割部位係在利用目視確認沒有塵埃或損傷等異常點後，自隨機部位進行選擇。準備將經切割之表面構件經由東麗公司製造之光學透明黏著片(折射率：1.47，厚度100μm)貼合於長10cm×寬10cm之尺寸之黑色板(可樂麗公司製造，商品名：Comoglas產品編號：DFA502K，厚度2.0mm)而成之樣品各20個。 The optical sheets of the examples and comparative examples were cut into 10 cm squares. After visually confirming that there are no abnormalities such as dust or damage, the cutting part is selected from a random part. The cut surface member is prepared to be pasted on a black board (manufactured by Kuraray Co., Ltd., trade name: Comoglas product) with a size of 10 cm in length × 10 cm in width via an optically transparent adhesive sheet (refractive index: 1.47, thickness 100 μm) manufactured by Toray. Code: DFA502K, thickness 2.0mm) each made of 20 samples.

使用表面粗糙度測量器(型號：SE-3400/小阪研究所公司製造)，以成為樣品固定且密接於測量平台上之狀態的方式進行設置後，根據下述之測量條件，測量光學片之凹凸面之JIS B0601：1994之Ra、Rz、S、及Sm。 θa之算出係依據小阪研究所公司製造之表面粗糙度測量器(SE-3400)之操作說明書(1995.07.20修訂)。將20個樣品之平均值設為各實施例及比較例之Ra、Rz、S、Sm及θa。測量時之氛圍係設為溫度23℃±5℃、濕度50%±10%。又，於測量開始前，將各樣品於23℃±5℃、濕度50%±10%之氛圍下放置10分鐘以上。 Use a surface roughness measuring device (model: SE-3400/manufactured by Kosaka Laboratories Co., Ltd.) and set it in a state where the sample is fixed and closely attached to the measurement platform, and then measure the unevenness of the optical sheet according to the following measurement conditions JIS B0601: Ra, Rz, S, and Sm of 1994. The calculation of θa is based on the operation manual of the surface roughness measuring instrument (SE-3400) manufactured by Kosaka Research Institute (revised on July 20, 1995). The average value of 20 samples was taken as Ra, Rz, S, Sm, and θa of each Example and Comparative Example. The atmosphere during the measurement is set to a temperature of 23℃±5℃ and a humidity of 50%±10%. Also, before the start of the measurement, place each sample in an atmosphere of 23°C±5°C and a humidity of 50%±10% for more than 10 minutes.

[表面粗糙度檢測部之觸針] [The stylus of the surface roughness detection department]

小阪研究所公司製造之商品名SE2555N(前端曲率半徑：2μm、頂角：90度、材質：金剛石) Product name SE2555N manufactured by Kosaka Research Institute Co., Ltd. (tip radius of curvature: 2μm, vertex angle: 90 degrees, material: diamond)

[表面粗糙度測量器之測量條件] [Measurement conditions of surface roughness measuring instrument]

‧基準長度(粗糙度曲線之截止值λc)：2.5mm ‧Standard length (cut-off value of roughness curve λc): 2.5mm

‧評價長度(基準長度(截止值λc)×5)：12.5mm ‧Evaluation length (reference length (cut-off value λc)×5): 12.5mm

‧觸針之輸送速度：0.5mm/s ‧Conveying speed of stylus: 0.5mm/s

‧縱向倍率：2000倍 ‧Longitudinal magnification: 2000 times

‧橫向倍率：10倍 ‧Horizontal magnification: 10 times

‧滑座(skid)：不使用(未接觸於測量面) ‧Slide (skid): not used (not in contact with the measuring surface)

‧截止濾波器種類：高斯 ‧Type of cutoff filter: Gaussian

‧無感區程度：10% ‧The degree of non-inductive zone: 10%

‧tp/PC曲線：普通 ‧Tp/PC curve: normal

A1-3.表面粗糙度測量(截止值0.8mm) A1-3. Surface roughness measurement (cut-off value 0.8mm)

使用表面粗糙度測量器(型號：SE-3400/小阪研究所公司製造)，根據下述之測量條件測量上述20個樣品之凹凸面之JIS B0601：1994的Rz。將20個樣品之平均值設為各實施例及比較例之Rz。 Using a surface roughness measuring device (model: SE-3400/manufactured by Kosaka Research Institute Co., Ltd.), the Rz of JIS B0601: 1994 of the concave and convex surfaces of the 20 samples was measured under the following measurement conditions. The average value of 20 samples was taken as the Rz of each Example and Comparative Example.

[表面粗糙度檢測部之觸針] [The stylus of the surface roughness detection department]

小阪研究所公司製造之商品名SE2555N(前端曲率半徑：2μm、頂角：90度、材質：金剛石) Product name SE2555N manufactured by Kosaka Research Institute Co., Ltd. (tip radius of curvature: 2μm, vertex angle: 90 degrees, material: diamond)

[表面粗糙度測量器之測量條件] [Measurement conditions of surface roughness measuring instrument]

‧基準長度(粗糙度曲線之截止值λc)：0.8mm ‧Standard length (cut-off value of roughness curve λc): 0.8mm

‧評價長度(基準長度(截止值λc)×5)：4.0mm ‧Evaluation length (reference length (cut-off value λc)×5): 4.0mm

‧觸針之輸送速度：0.5mm/s ‧Conveying speed of stylus: 0.5mm/s

‧縱向倍率：2000倍 ‧Longitudinal magnification: 2000 times

‧橫向倍率：10倍 ‧Horizontal magnification: 10 times

‧滑座：不使用(未接觸於測量面) ‧Slide: Not used (not in contact with the measuring surface)

‧截止濾波器種類：高斯 ‧Type of cutoff filter: Gaussian

‧無感區程度：10% ‧The degree of non-inductive zone: 10%

‧tp/PC曲線：普通 ‧Tp/PC curve: normal

A1-4.戶外防眩性 A1-4. Outdoor anti-glare

將黑色丙烯酸板經由透明黏著劑而貼合於所獲得之光學片之基材側而製作評價用樣品。繼而，於照度為7000~13000勒克司之環境(晴天之窗前之環境)下，將各評價用樣品水平地設置於高度1m左右之水平台上，20人利用目視自約50cm上方以各種角度進行評價，依據以下之基準進行評價，使用最多數之評價作為結果。 The black acrylic plate was bonded to the substrate side of the obtained optical sheet via a transparent adhesive to prepare an evaluation sample. Then, in an environment with an illuminance of 7000~13000 lux (an environment in front of a window on a sunny day), each evaluation sample was set horizontally on a water platform with a height of about 1m, and 20 people used visual observation from about 50cm above at various angles. The evaluation is performed based on the following criteria, and the most numerous evaluations are used as the result.

A：於樣品表面未感覺到太陽光之炫目。 A: The dazzling of sunlight is not felt on the surface of the sample.

B：視角度於樣品表面少許感覺到太陽光之炫目，但為容許範圍內。 B: The viewing angle is slightly dazzling from sunlight on the surface of the sample, but it is within the allowable range.

C：於樣品表面強烈地感覺到太陽光之炫目。 C: The dazzling of sunlight is strongly felt on the surface of the sample.

A1-5.解像性 A1-5. Resolution

將所獲得之光學片之基材側經由透明黏著劑貼合於市售行動電話(7.9英吋LCD)之最表面之玻璃上，於照度為7000~13000勒克司(晴天之窗前)環境下，將各顯示裝置水平地設置於高度1m左右之水平台上，20人利用目視自約30cm上方以各種角度確認各顯示裝置之初期畫面之圖符、文字。將可良好地辨識圖符、文字者設為2分；將在不會妨礙操作之範圍內可辨識圖符、文字者設為1分；將圖符、文字難以辨識且妨礙操作者設為0分以進行評價。將20人之平均分數為1.6分以上者設為A，將為1.2分以上且未達1.6分者設為B，將未達1.2分者設為C。 The substrate side of the obtained optical sheet is pasted on the glass on the outermost surface of a commercially available mobile phone (7.9-inch LCD) via a transparent adhesive, under an illuminance of 7000~13000 lux (in front of the window on a sunny day) , Each display device is set horizontally on a water platform with a height of about 1m, and 20 people use visual observation from about 30cm above to confirm the icons and characters of the initial screen of each display device at various angles. Set 2 points for those who can recognize icons and characters well; set 1 point for those who can recognize icons and characters within the range that will not hinder the operation; set the icons and characters difficult to distinguish and hinder the operator to 0 Points for evaluation. If the average score of 20 people is 1.6 points or more, it is set as A, those with 1.2 points or more and less than 1.6 points are set as B, and those with less than 1.2 points are set as C.

A1-6.觸感(滑動性) A1-6. Touch (slidability)

將10cm見方之丙烯酸板貼合於所獲得之光學片之基材側。繼而，進行想到用觸控面板進行操作之下述2種操作。 A 10 cm square acrylic plate was attached to the substrate side of the obtained optical sheet. Then, perform the following two kinds of operations conceived of operating with the touch panel.

20人進行該操作，將觸感極為良好者設為2分，將觸感良好者設為1分，將觸感較差者設為0分以進行評價。將20人之平均分數為1.6分以上者設為A，將1.2分以上且未達1.6分者設為B，將未達1.2分者設為C。 Twenty people performed this operation, and those with extremely good tactile sensations were rated as 2 points, those with good tactile sensations were rated as 1 point, and those with poor tactile sensations were rated as 0 points for evaluation. If the average score of 20 people is 1.6 points or more, it is set as A, those with 1.2 points or more and less than 1.6 points are set as B, and those with less than 1.2 points are set as C.

<操作1(滾動操作)> <Operation 1 (Scroll Operation)>

用食指指腹進行操作。進行如下操作：用慣用手壓住板，用並非慣用手之手指指腹在光學片凹凸表面沿左右方向以1秒左右移動約5cm距離。將該操作1反覆進行5次。 Use index finger to operate. Proceed as follows: Press the board with the dominant hand, and move the concave and convex surface of the optical sheet along the left and right directions with the finger pads of the fingers that are not the dominant hand for about 5 cm in a distance of about 1 second. This operation 1 was repeated 5 times.

<操作2(擴大縮小操作)> <Operation 2 (Enlargement and Reduction Operation)>

用慣用手壓住板，將並非慣用手之食指與大拇指之橫側放置在光學片凹凸表面之大致中心部，使食指及大拇指分別以1秒左右同時移動2~3 cm，而進行擴大時的操作。其後，立即進行向原本之中心部之縮小時之操作。將該操作2反覆進行5次。 Press the board with your dominant hand, and place the lateral sides of the index finger and thumb that are not the dominant hand on the approximate center of the uneven surface of the optical sheet, and move the index finger and thumb at the same time for about 1 second for 2~3. cm, and the operation when expanding. Immediately after that, the operation for shrinking to the original center is performed. This operation 2 was repeated 5 times.

A1-7.操作開始時手指之卡頓觸感 A1-7. Stuck feeling of fingers at the beginning of the operation

製作與上述(A1-6)相同之樣品，20人進行上述1及上述2之操作。於操作1及操作2中，將手指之卡頓程度同等者設為2分，將手指之卡頓程度些許不同者設為1分，將手指之卡頓程度不同者設為0分以進行評價。將20人之平均分數為1.6分以上者設為A，將1.2分以上且未達1.6分者設為B，將未達1.2分者設為C。 Prepare the same sample as the above (A1-6), and 20 people will perform the above 1 and 2 operations. In Operation 1 and Operation 2, set the fingers with the same degree of stuttering to 2 points, set the fingers with slightly different degree of stuttering to 1 point, and set the fingers with different degrees of stuttering to 0 for evaluation. . If the average score of 20 people is 1.6 points or more, it is set as A, those with 1.2 points or more and less than 1.6 points are set as B, and those with less than 1.2 points are set as C.

A2.光學片之製作 A2. Production of optical film

[實施例A1] [Example A1]

於塑膠膜(厚度80μm三乙醯纖維素樹脂膜(TAC)，富士軟片公司製造，TD80UL)上塗佈下述配方之凹凸層塗佈液A1，於70℃、風速5m/s下乾燥30秒鐘後，於氮氣氛圍(氧濃度200ppm以下)下以累計光量成為100mJ/cm²之方式照射紫外線而形成凹凸層，獲得光學片。凹凸層之膜厚為7μm。 Coat the plastic film (thickness 80μm triacetyl cellulose resin film (TAC), manufactured by Fujifilm Co., Ltd., TD80UL) with the concave-convex layer coating solution A1 of the following formula, and dry for 30 seconds at 70°C and wind speed of 5m/s After an hour, ultraviolet rays were irradiated in a nitrogen atmosphere (oxygen concentration of 200 ppm or less) so that the cumulative light amount became 100 mJ/cm ² to form a concavo-convex layer, and an optical sheet was obtained. The film thickness of the uneven layer is 7 μm.

<凹凸層塗佈液A1> <Concavo-convex layer coating liquid A1>

‧二-三羥甲基丙烷四丙烯酸酯55份 ‧55 parts of di-trimethylolpropane tetraacrylate

(SARTOMER公司製造，SR355) (Manufactured by SARTOMER, SR355)

‧光聚合起始劑3份 ‧3 parts of photopolymerization initiator

(BASF公司製造，Irgacure 184) (Manufactured by BASF, Irgacure 184)

‧聚矽氧系調平劑0.25份 ‧Polysiloxane-based leveling agent 0.25 parts

(摩曼帝夫特性材料公司製造，TSF4460) (Manufactured by Momandif Specialty Materials Co., Ltd., TSF4460)

‧球狀聚丙烯酸-苯乙烯共聚物粒子10份 ‧10 parts of spherical polyacrylic acid-styrene copolymer particles

(平均粒徑6μm，折射率1.52) (Average particle size 6μm, refractive index 1.52)

‧膠體二氧化矽微粒子(反應性之疏水處理)100份 ‧100 parts of colloidal silica particles (reactive hydrophobic treatment)

(日產化學工業(股)製造，溶劑MIBK，固形物成分30%)(平均粒徑10~15nm) (Manufactured by Nissan Chemical Industry Co., Ltd., solvent MIBK, solid content 30%) (average particle size 10-15nm)

‧溶劑(MIBK)110份 ‧110 parts of solvent (MIBK)

[實施例A2] [Example A2]

將實施例A1之凹凸層塗佈液A1變更為下述配方之凹凸層塗佈液A2，且將膜厚設為6μm，除此以外，以與實施例A1相同之方式獲得光學片。 The uneven layer coating liquid A1 of Example A1 was changed to the uneven layer coating liquid A2 of the following formulation, and the film thickness was 6 μm, except that the optical sheet was obtained in the same manner as in Example A1.

<凹凸層塗佈液A2> <Concavo-convex layer coating liquid A2>

‧多官能丙烯酸酯低聚物60份 ‧60 parts of multifunctional acrylate oligomer

(日本合成化學工業(股)製造，UV7640B官能基數6~7) (Manufactured by Nippon Synthetic Chemical Industry Co., Ltd., UV7640B functional group number 6~7)

‧光聚合起始劑3份 ‧3 parts of photopolymerization initiator

(BASF公司製造，Irgacure 184) (Manufactured by BASF, Irgacure 184)

‧聚矽氧系調平劑：聚酯改性聚二甲基矽氧烷0.2份 ‧Polysiloxane leveling agent: 0.2 part of polyester modified polydimethylsiloxane

(BYK-CHEMIE公司製造，BYK370) (Manufactured by BYK-CHEMIE, BYK370)

‧球狀聚丙烯酸-苯乙烯共聚物粒子16份 ‧Spherical polyacrylic acid-styrene copolymer particles 16 parts

(平均粒徑3.5μm，折射率1.52) (Average particle size 3.5μm, refractive index 1.52)

‧燻矽(fumed silica)微粒子(疏水處理：辛基矽烷處理)6份 ‧Fumed silica particles (hydrophobic treatment: octyl silane treatment) 6 parts

(日本艾羅技(股)製造，平均粒徑10~15nm) (Manufactured by Airotech Co., Ltd., with an average particle size of 10~15nm)

‧溶劑1(甲苯)135份 ‧Solvent 1 (toluene) 135 parts

[實施例A3] [Example A3]

將實施例A1之凹凸層塗佈液A1變更為下述配方之凹凸層塗佈液A3，且將凹凸層之膜厚設為2.5μm，除此以外，以與實施例A1相同之方式獲得光學片。 The uneven layer coating liquid A1 of Example A1 was changed to the uneven layer coating liquid A3 of the following formulation, and the film thickness of the uneven layer was set to 2.5 μm, except that the optical fiber was obtained in the same manner as in Example A1. piece.

<凹凸層塗佈液A3> <Concavo-convex layer coating liquid A3>

‧新戊四醇三丙烯酸酯100份 ‧100 parts of neopentylerythritol triacrylate

(日本化藥公司製造，KAYARAD-PET-30) (Manufactured by Nippon Kayaku Co., Ltd., KAYARAD-PET-30)

‧無機粒子14份 ‧14 parts of inorganic particles

(富士西利西亞化學(股)製造，非晶形矽石) (Manufactured by Fuji Silica Chemical Co., Ltd., amorphous silica)

(疏水處理，矽烷偶合劑，平均凝集粒徑2μm) (Hydrophobic treatment, silane coupling agent, average aggregate particle size 2μm)

‧光聚合起始劑5份 ‧5 parts of photopolymerization initiator

(BASF公司製造，Irgacure 184) (Manufactured by BASF, Irgacure 184)

‧聚矽氧系調平劑0.2份 ‧Polysiloxane-based leveling agent 0.2 part

(摩曼帝夫特性材料公司製造TSF4460) (TSF4460 manufactured by Momandif Specialty Materials Co., Ltd.)

‧脫模劑2份 ‧2 parts of release agent

(大金工業(股)製造，OPTOOL DAC) (Manufactured by Daikin Industrial Co., Ltd., OPTOOL DAC)

‧溶劑1(甲苯)150份 ‧150 parts of solvent 1 (toluene)

‧溶劑2(MIBK)35份 ‧35 parts of solvent 2 (MIBK)

[比較例A1] [Comparative Example A1]

將實施例A1之凹凸層塗佈液A1變更為下述配方之凹凸層塗佈液A4，且將凹凸層之膜厚設為4μm，除此以外，以與實施例A1相同之方式獲得光學片。 The uneven layer coating liquid A1 of Example A1 was changed to the uneven layer coating liquid A4 of the following formulation, and the film thickness of the uneven layer was set to 4 μm, except that the optical sheet was obtained in the same manner as in Example A1 .

<凹凸層塗佈液A4> <Concavo-convex layer coating liquid A4>

‧脂肪族聚酯骨架6官能丙烯酸胺基甲酸酯100份 ‧Aliphatic polyester skeleton 6-functional acrylic urethane 100 parts

(SARTOMER公司製造，CN968) (Manufactured by SARTOMER, CN968)

‧球狀聚丙烯酸-苯乙烯共聚物粒子3份 ‧3 parts of spherical polyacrylic acid-styrene copolymer particles

(平均粒徑2.5μm，折射率1.52) (Average particle size 2.5μm, refractive index 1.52)

‧燻矽微粒子(疏水處理：甲基)3份 ‧Smoked silicon particles (hydrophobic treatment: methyl) 3 parts

(日本艾羅技(股)製造，平均粒徑10~15nm) (Manufactured by Airotech Co., Ltd., with an average particle size of 10~15nm)

‧光聚合起始劑3份 ‧3 parts of photopolymerization initiator

(BASF公司製造，Irgacure184) (Manufactured by BASF, Irgacure184)

‧聚矽氧系調平劑：聚醯改性聚矽氧烷0.2份 ‧Polysiloxane leveling agent: 0.2 part of polysiloxane modified polysiloxane

(Shin-Etsu Silicones(股)製造，KF6004) (Manufactured by Shin-Etsu Silicones Co., Ltd., KF6004)

‧溶劑1(甲苯)150份 ‧150 parts of solvent 1 (toluene)

‧溶劑2(MIBK)35份 ‧35 parts of solvent 2 (MIBK)

[比較例A2] [Comparative Example A2]

將實施例A1之凹凸層塗佈液A1變更為下述配方之凹凸層塗佈液A5，且將凹凸層之膜厚設為3μm，除此以外，以與實施例A1相同之方式獲得光學片。 The uneven layer coating liquid A1 of Example A1 was changed to the uneven layer coating liquid A5 of the following formulation, and the film thickness of the uneven layer was set to 3 μm, except that the optical sheet was obtained in the same manner as in Example A1 .

<凹凸層塗佈液A5> <Concavo-convex layer coating liquid A5>

‧脂肪族聚酯骨架6官能丙烯酸胺基甲酸酯100份 ‧Aliphatic polyester skeleton 6-functional acrylic urethane 100 parts

(SARTOMER公司製造，CN968) (Manufactured by SARTOMER, CN968)

‧非晶形矽石微粒子(疏水處理：矽烷偶合劑)15份 ‧Amorphous silica particles (hydrophobic treatment: silane coupling agent) 15 parts

(富士西利西亞化學(股)製造，平均凝集粒徑2.5μm) (Manufactured by Fuji Silesia Chemical Co., Ltd., average agglomerated particle size 2.5μm)

‧光聚合起始劑3份 ‧3 parts of photopolymerization initiator

(BASF公司製造，Irgacure184) (Manufactured by BASF, Irgacure184)

‧聚矽氧系調平劑：聚醚改性聚矽氧烷0.2份 ‧Polysiloxane leveling agent: 0.2 part of polyether modified polysiloxane

(Shin-Etsu Silicones(股)製造，X-22-2516) (Manufactured by Shin-Etsu Silicones Co., Ltd., X-22-2516)

‧溶劑(甲苯)150份 ‧150 parts of solvent (toluene)

根據表1之結果可知，實施例A1~A3之光學片可賦予戶外 防眩性，並且可使解析性及操作性變得良好。 According to the results in Table 1, it can be seen that the optical sheets of Examples A1~A3 can be used for outdoor It has anti-glare properties and can improve resolution and operability.

A3.觸控面板之製作 A3. Production of touch panel

於實施例A1~A3及比較例A1、A2之光學片之透明基材側利用濺鍍法形成厚度20nm之ITO導電性膜，而製成上部電極板。繼而，於厚度1mm之強化玻璃板之一面利用濺鍍法形成以厚度約20nm之ITO導電性膜，而製成下部電極板。繼而，藉由網版印刷法，將作為間隔件用塗佈液之游離輻射硬化型樹脂(Dot Cure TR5903：太陽油墨公司)點狀地印刷至下部電極板具有導電性膜之面後，利用高壓水銀燈照射紫外線，並使直徑50μm、高度8μm之間隔件以1mm之間隔排列。 On the transparent substrate side of the optical sheets of Examples A1 to A3 and Comparative Examples A1 and A2, an ITO conductive film with a thickness of 20 nm was formed by a sputtering method to form an upper electrode plate. Then, an ITO conductive film with a thickness of about 20 nm was formed on one surface of a strengthened glass plate with a thickness of 1 mm by a sputtering method to form a lower electrode plate. Then, by screen printing, the ionizing radiation curable resin (Dot Cure TR5903: Sun Ink Co., Ltd.) as a coating solution for spacers was printed in dots on the conductive film surface of the lower electrode plate. The mercury lamp was irradiated with ultraviolet rays, and spacers with a diameter of 50 μm and a height of 8 μm were arranged at intervals of 1 mm.

繼而，使上部電極板與下部電極板以使導電性膜彼此對向之方式進行配置，用厚度30μm、寬度3mm之雙面膠帶將邊緣進行接著，而製作實施例A1~A3及比較例A1、A2之電阻膜式觸控面板。 Then, the upper electrode plate and the lower electrode plate were arranged so that the conductive films were opposed to each other, and the edges were bonded with a double-sided tape having a thickness of 30 μm and a width of 3 mm to produce Examples A1 to A3 and Comparative Examples A1. A2 resistive film type touch panel.

實施例A1~A3之電阻膜式觸控面板具有戶外防眩性，並且解析性及操作性良好。另一方面，比較例A1之電阻膜式觸控面板由於戶外防眩性不足故而炫目，且操作性降低。又，比較例A2之電阻膜式觸控面板由於戶外防眩性過剩，故而無法辨識顯示畫面之影像、文字資訊。 The resistive film type touch panels of Examples A1 to A3 have outdoor anti-glare properties, and have good resolution and operability. On the other hand, the resistive film type touch panel of Comparative Example A1 is dazzling due to insufficient outdoor anti-glare properties, and its operability is reduced. In addition, the resistive film type touch panel of Comparative Example A2 cannot recognize the image and text information of the display screen due to excessive outdoor anti-glare properties.

A4.顯示裝置(1)之製作 A4. Production of display device (1)

將實施例A1~A3及比較例A1、A2之光學片與市售之超高清液晶顯示裝置(4.7英吋，像素密度約320ppi)之表面玻璃板經由透明黏著劑進行貼合，而製作實施例A1~A3及比較例A1、A2之顯示裝置(1)。再者，於貼合時，使光學片之凹凸面朝向與顯示元件相反側。 The optical sheets of Examples A1 to A3 and Comparative Examples A1 and A2 were bonded to the surface glass plate of a commercially available ultra-high-definition liquid crystal display device (4.7 inches, pixel density about 320ppi) through a transparent adhesive to produce an example Display devices (1) of A1 to A3 and comparative examples A1 and A2. Furthermore, when bonding, the uneven surface of the optical sheet is directed to the side opposite to the display element.

利用目視評價所獲得之顯示裝置(1)有無炫光，結果關於實施例A1 ~A3之顯示裝置(1)，炫光得到抑制，外部光之映入亦較少而辨認性良好。又，實施例A1~A3之顯示裝置(1)亦不會損害超高清影像之解析度。 The display device (1) obtained by visual evaluation was used for the presence or absence of glare, and the results were related to Example A1 ~A3 display device (1), the glare is suppressed, the reflection of external light is also less, and the visibility is good. In addition, the display devices (1) of the embodiments A1 to A3 will not damage the resolution of the ultra-high-definition image.

A5.顯示裝置(2)之製作 A5. Production of display device (2)

將實施例A1~A3及比較例A1、A2之光學片之基材變更為厚度50μm之聚對酞酸乙二酯膜(延遲值2,500nm)，除此以外，以與實施例A1~A3及比較例A1、A2相同之方式，製作實施例A4~A6及比較例A3、A4之光學片。實施例A4~A6及比較例A3、A4之光學片之表1之各物性值係與實施例A1~A3及比較例A1、A2大致相同。 The base material of the optical sheets of Examples A1 to A3 and Comparative Examples A1 and A2 was changed to a polyethylene terephthalate film with a thickness of 50 μm (retardation value 2,500 nm). Otherwise, the same as those of Examples A1 to A3 and In the same manner as Comparative Examples A1 and A2, optical sheets of Examples A4 to A6 and Comparative Examples A3 and A4 were produced. The physical property values in Table 1 of the optical sheets of Examples A4 to A6 and Comparative Examples A3 and A4 are approximately the same as those of Examples A1 to A3 and Comparative Examples A1 and A2.

將實施例A4~A6及比較例A3、A4之光學片、與具備微腔構造之三色獨立方式之有機EL顯示元件上具有偏光元件的市售有機EL顯示裝置(基於CIE-xy色度圖之BT.2020之覆蓋率：77%)的表面玻璃板經由透明黏著劑進行貼合，而製作實施例A4~A6及比較例A3、A4之顯示裝置(2)。再者，於貼合時，使光學片之凹凸面朝向與顯示元件相反側。 The optical sheets of Examples A4 to A6 and Comparative Examples A3 and A4, and a commercially available organic EL display device with a polarizing element on a three-color independent organic EL display element with a microcavity structure (based on the CIE-xy chromaticity diagram BT.2020 (coverage rate: 77%) surface glass plates were pasted through a transparent adhesive to fabricate the display devices (2) of Examples A4 to A6 and Comparative Examples A3 and A4. Furthermore, when bonding, the uneven surface of the optical sheet is directed to the side opposite to the display element.

[顯示裝置(2)之評價] [Evaluation of Display Device (2)]

<漸變色之色不均> <The uneven color of the gradient>

將顯示裝置(2)之畫面進行白顯示或大致白顯示。經由偏光太陽眼鏡自各種角度目視觀察畫面，依據以下之標準，由20人評價是否可辨認漸變色之色不均，將最多數之評價設為結果。將結果示於表2。 The screen of the display device (2) is displayed in white or almost white. The screen was visually observed from various angles through polarized sunglasses. According to the following criteria, 20 people evaluated whether the uneven color of the gradual color could be recognized, and the most evaluation was set as the result. The results are shown in Table 2.

A：漸變色之色不均無法辨認。 A: The uneven color of the gradient color cannot be recognized.

B：漸變色之色不均可極少地辨認到，但不會妨礙圖像品質。 B: The gradual color is not always recognizable, but it will not hinder the image quality.

C：漸變色之色不均被清晰地辨認到，會嚴重地妨礙圖像品質。 C: The uneven color of the gradation is clearly recognized, which will seriously hinder the image quality.

構成顯示裝置(2)之顯示元件係色域極廣，容易產生漸變 色之色不均者，但實施例A4~A6之顯示裝置可難以辨認漸變色之色不均。尤其是實施例A6之顯示裝置由於具有Ra較大，且具有適度之無規性之凹凸形狀，故而漸變色之色不均幾乎完全無法辨認。 The display elements constituting the display device (2) have a very wide color gamut, which is easy to produce gradation The color is uneven, but the display devices of Examples A4 to A6 can hardly recognize the uneven color of the gradation. In particular, since the display device of Example A6 has a large Ra and a moderately random uneven shape, the color unevenness of the gradation color is almost completely unrecognizable.

<實施形態B之實施例> <Example of Embodiment B>

B1.測量及評價 B1. Measurement and evaluation

針對實施例及比較例中所製作之光學片，進行以下之測量及評價。將結果示於表3。 With respect to the optical sheets produced in the examples and comparative examples, the following measurements and evaluations were performed. The results are shown in Table 3.

B1-1.摩擦係數 B1-1. Friction coefficient

使用新東科學(股)製造之商品名HEIDON NHS2000，於一定負載往返摩擦測量模式下藉由以下之方法測量靜摩擦係數μs及動摩擦係數μk，而算出比(μs/μk)。 Using the trade name HEIDON NHS2000 manufactured by Shinto Science Co., Ltd., the static friction coefficient μs and the dynamic friction coefficient μk are measured by the following method under a certain load reciprocating friction measurement mode, and the ratio (μs/μk) is calculated.

使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於光學片之凹凸，對刮針施加垂直負載100g，且同時使該刮針以5mm/秒之掃描速度進行單程長度為10mm之往返1次，對此時之對於該刮針之動摩擦係數μk進行測量。又，藉由相同之操作，測量施加於刮針之垂直負載為500g、及1000g時之動摩擦係數μk。進而，以與上述操作相同之方式，測量施加於刮針之垂直負載為100g、500g及1000g時之靜摩擦係數μs。 A sapphire needle with a tip radius of 0.3mm is vertically in contact with the unevenness of the optical sheet, a vertical load of 100g is applied to the needle, and at the same time the squeegee is made to perform one round trip with a length of 10mm at a scanning speed of 5mm/sec. At this time, the kinetic friction coefficient μk of the scraping needle was measured. In addition, by the same operation, the dynamic friction coefficient μk when the vertical load applied to the squeegee needle is 500g and 1000g is measured. Furthermore, in the same manner as the above operation, the static friction coefficient μs when the vertical load applied to the squeegee needle is 100 g, 500 g, and 1000 g is measured.

再者，測量時之氛圍係設為溫度23℃±5℃、濕度50%±10%。又，於測 量開始前，將各樣品放置於23℃±5℃、濕度50%±10%之氛圍中10分鐘以上。 Furthermore, the atmosphere at the time of measurement is set to a temperature of 23°C±5°C and a humidity of 50%±10%. Also, Yu Ce Before the start of the measurement, place each sample in an atmosphere of 23°C±5°C and a humidity of 50%±10% for more than 10 minutes.

表3中所示之實施例B1、B2、及比較例B4之數式均為藉由最小平方法所算出之近似一次直線。 The numerical formulas of Examples B1, B2, and Comparative Example B4 shown in Table 3 are all approximate linear straight lines calculated by the least square method.

B1-2.表面粗糙度測量(截止值2.5mm) B1-2. Surface roughness measurement (cut-off value 2.5mm)

將實施例及比較例之光學片切割成10cm見方。切割部位係在利用目視確認沒有塵埃或損傷等異常點後，自隨機之部位進行選擇。準備將經切割之表面構件經由東麗公司製造之光學透明黏著片(折射率：1.47，厚度100μm)貼合於長10cm×寬10cm之尺寸之黑色板(可樂麗公司製造，商品名：Comoglas產品編號：DFA502K，厚度2.0mm)而成之樣品各20個。 The optical sheets of the examples and comparative examples were cut into 10 cm squares. After visually confirming that there are no abnormalities such as dust or damage, the cutting part is selected from a random part. The cut surface member is prepared to be pasted on a black board (manufactured by Kuraray Co., Ltd., trade name: Comoglas product) with a size of 10 cm in length × 10 cm in width via an optically transparent adhesive sheet (refractive index: 1.47, thickness 100 μm) manufactured by Toray. Code: DFA502K, thickness 2.0mm) each made of 20 samples.

使用表面粗糙度測量器(型號：SE-3400/小阪研究所公司製造)，以成為樣品固定且密接於測量平台上之狀態的方式進行設置後，根據下述之測量條件，測量光學片之凹凸面之JIS B0601：1994之Ra、Rz、S、及Sm。θa之算出係依據小阪研究所公司製造之表面粗糙度測量器(SE-3400)之操作說明書(1995.07.20修訂)。將20個樣品之平均值設為各實施例及比較例之Ra、Rz、S、Sm及θa。測量時之氛圍係設為溫度23℃±5℃、濕度50%±10%。又，於測量開始前，將各樣品於23℃±5℃、濕度50%±10%之氛圍下放置10分鐘以上。 Use a surface roughness measuring device (model: SE-3400/manufactured by Kosaka Laboratories Co., Ltd.) and set it in a state where the sample is fixed and closely attached to the measurement platform, and then measure the unevenness of the optical sheet according to the following measurement conditions JIS B0601: Ra, Rz, S, and Sm of 1994. The calculation of θa is based on the operation manual of the surface roughness measuring instrument (SE-3400) manufactured by Kosaka Research Institute (revised on July 20, 1995). The average value of 20 samples was taken as Ra, Rz, S, Sm, and θa of each Example and Comparative Example. The atmosphere during the measurement is set to a temperature of 23℃±5℃ and a humidity of 50%±10%. Also, before the start of the measurement, place each sample in an atmosphere of 23°C±5°C and a humidity of 50%±10% for more than 10 minutes.

[表面粗糙度檢測部之觸針] [The stylus of the surface roughness detection department]

小阪研究所公司製造之商品名SE2555N(前端曲率半徑：2μm、頂角：90度、材質：金剛石) Product name SE2555N manufactured by Kosaka Research Institute Co., Ltd. (tip radius of curvature: 2μm, vertex angle: 90 degrees, material: diamond)

[表面粗糙度測量器之測量條件] [Measurement conditions of surface roughness measuring instrument]

‧基準長度(粗糙度曲線之截止值λc)：2.5mm ‧Standard length (cut-off value of roughness curve λc): 2.5mm

‧評價長度(基準長度(截止值λc)×5)：12.5mm ‧Evaluation length (reference length (cut-off value λc)×5): 12.5mm

‧觸針之輸送速度：0.5mm/s ‧Conveying speed of stylus: 0.5mm/s

‧縱向倍率：2000倍 ‧Longitudinal magnification: 2000 times

‧橫向倍率：10倍 ‧Horizontal magnification: 10 times

‧滑座：不使用(未接觸於測量面) ‧Slide: Not used (not in contact with the measuring surface)

‧截止濾波器種類：高斯 ‧Type of cutoff filter: Gaussian

‧無感區程度：10% ‧The degree of non-inductive zone: 10%

‧tp/PC曲線：普通 ‧Tp/PC curve: normal

B1-3.表面粗糙度測量(截止值0.8mm) B1-3. Surface roughness measurement (cut-off value 0.8mm)

使用表面粗糙度測量器(型號：SE-3400/小阪研究所公司製造)，根據下述之測量條件測量上述20個樣品之凹凸面之JIS B0601：1994的Rz。將20個樣品之平均值設為各實施例及比較例之Rz。 Using a surface roughness measuring device (model: SE-3400/manufactured by Kosaka Research Institute Co., Ltd.), the Rz of JIS B0601: 1994 of the concave and convex surfaces of the 20 samples was measured under the following measurement conditions. The average value of 20 samples was taken as the Rz of each Example and Comparative Example.

[表面粗糙度檢測部之觸針] [The stylus of the surface roughness detection department]

小阪研究所公司製造之商品名SE2555N(前端曲率半徑：2μm、頂角：90度、材質：金剛石) Product name SE2555N manufactured by Kosaka Research Institute Co., Ltd. (tip radius of curvature: 2μm, vertex angle: 90 degrees, material: diamond)

[表面粗糙度測量器之測量條件] [Measurement conditions of surface roughness measuring instrument]

‧基準長度(粗糙度曲線之截止值λc)：0.8mm ‧Standard length (cut-off value of roughness curve λc): 0.8mm

‧評價長度(基準長度(截止值λc)×5)：4.0mm ‧Evaluation length (reference length (cut-off value λc)×5): 4.0mm

‧觸針之輸送速度：0.5mm/s ‧Conveying speed of stylus: 0.5mm/s

‧縱向倍率：2000倍 ‧Longitudinal magnification: 2000 times

‧橫向倍率：10倍 ‧Horizontal magnification: 10 times

‧滑座：不使用(未接觸於測量面) ‧Slide: Not used (not in contact with the measuring surface)

‧截止濾波器種類：高斯 ‧Type of cutoff filter: Gaussian

‧無感區程度：10% ‧The degree of non-inductive zone: 10%

‧tp/PC曲線：普通 ‧Tp/PC curve: normal

B1-4.戶外防眩性 B1-4. Outdoor anti-glare

將黑色丙烯酸板經由透明黏著劑貼合於所獲得之光學片之基材側而製作評價用樣品。繼而，於照度為7000~13000勒克司(晴天之窗前)環境下，將各評價用樣品水平地設置於高度1m左右之水平台上，20人利用目視自約50cm上方以各種角度進行評價，依據以下之基準進行評價，使用最多數之評價作為結果。 A black acrylic plate was bonded to the substrate side of the obtained optical sheet via a transparent adhesive to prepare a sample for evaluation. Then, under an environment with an illuminance of 7000 to 13000 lux (in front of the window on a sunny day), each evaluation sample was set horizontally on a water platform with a height of about 1m, and 20 people visually evaluated from about 50cm above at various angles. Evaluate based on the following criteria, and use the largest number of evaluations as the result.

A：於樣品表面未感覺到太陽光之炫目。 A: The dazzling of sunlight is not felt on the surface of the sample.

B：視角度於樣品表面少許感覺到太陽光之炫目，但為容許範圍內。 B: The viewing angle is slightly dazzling from sunlight on the surface of the sample, but it is within the allowable range.

C：於樣品表面強烈地感覺到太陽光之炫目。 C: The dazzling of sunlight is strongly felt on the surface of the sample.

B1-5.解析性 B1-5. Analytical

將所獲得之光學片之基材側經由透明黏著劑貼合於市售行動電話(7.9英吋LCD)之最表面之玻璃上，於照度為7000~13000勒克司(晴天之窗前)環境下，將各顯示裝置水平地設置於高度1m左右之水平台上，20人利用目視自約30cm上方以各種角度確認各顯示裝置之初期畫面之圖符、文字。將可良好地辨識圖符、文字者設為2分；將在不會妨礙操作之範圍內可辨識圖符、文字者設為1分；將圖符、文字難以辨識且妨礙操作者設為0分以進行評價。將20人之平均分數為1.6分以上者設為A，將為1.2分以上且未達1.6分者設為B，將未達1.2分者設為C。 The substrate side of the obtained optical sheet is pasted on the glass on the outermost surface of a commercially available mobile phone (7.9-inch LCD) via a transparent adhesive, under an illuminance of 7000~13000 lux (in front of the window on a sunny day) , Each display device is set horizontally on a water platform with a height of about 1m, and 20 people use visual observation from about 30cm above to confirm the icons and characters of the initial screen of each display device at various angles. Set 2 points for those who can recognize icons and characters well; set 1 point for those who can recognize icons and characters within the range that will not hinder the operation; set the icons and characters difficult to distinguish and hinder the operator to 0 Points for evaluation. If the average score of 20 people is 1.6 points or more, it is set as A, those with 1.2 points or more and less than 1.6 points are set as B, and those with less than 1.2 points are set as C.

B1-6.操作性 B1-6. Operability

製作於所獲得之光學片之基材側貼合有10cm見方之丙烯酸板之樣品。繼而，進行在樣品之光學片之凹凸面上移動手指以進行方向轉換的操作。操作係各人於較輕之負載(站立之狀態下，用與慣用手相反側之手拿著樣品，用慣用手進行操作時之負載)、較重之負載(將樣品置於桌子上，用與慣用手相反側之手固定樣品，用慣用手進行操作時之負載)之兩種負載下進行。將於任一種負載之操作時，均可容易地進行方向轉換，而感覺到操作性良好者設為2分，將於至少一種負載之操作時，於方向轉換時手指些許滑動，或者於方向轉換時感覺到手指稍重，而感覺到操作性有些許異常者設為1分，將於至少一種負載之操作時，於方向轉換時手指滑動，或者於方向轉換時感覺到手指較重，而感覺到操作性有明顯異常者設為0分，由20人進行評價。將20人之平均分數為1.6分以上者設為A，將為1.0分以上且未達1.6分者設為B，將為0.5分以上且未達1.0分者設為C，將未達0.5分者設為D。 A sample with a 10 cm square acrylic plate attached to the substrate side of the obtained optical sheet was prepared. Then, move the finger on the concave and convex surface of the optical sheet of the sample to switch the direction. The operation is for each person under a light load (when standing, hold the sample with the hand opposite to the dominant hand, and use the dominant hand to operate the load), heavier load (put the sample on the table, use Fix the sample with the hand on the opposite side of the dominant hand, and use the dominant hand to operate the load under two types of loads). When operating any load, you can easily change the direction. If you feel that the operability is good, set it to 2 points. When operating at least one load, slide your finger slightly when changing the direction, or change the direction. When the finger is slightly heavier, but the operability is slightly abnormal, it is set to 1 point. When operating at least one load, the finger slides when the direction is changed, or the finger is heavier when the direction is changed. Those with obvious abnormality in operability were set as 0 points and evaluated by 20 people. If the average score of 20 people is 1.6 or more is set as A, if the score is 1.0 or more and less than 1.6 is set as B, if the score is 0.5 or more and less than 1.0 is set as C, and the score is less than 0.5. Set as D.

B-2.光學片之製作 B-2. Production of optical film

[實施例B1] [Example B1]

將下述配方之凹凸層塗佈液B1塗佈於塑膠膜(厚度80μm三乙醯纖維素樹脂膜(TAC)，富士軟片公司製造，TD80UL)上，以70℃、風速5m/s乾燥30秒鐘後，於氮氣氛圍(氧濃度200ppm以下)下以累計光量成為100mJ/cm²之方式照射紫外線而形成凹凸層，獲得光學片。凹凸層之膜厚為2.5μm。 Coating solution B1 for the uneven layer with the following formula was coated on a plastic film (thickness 80μm triacetyl cellulose resin film (TAC), manufactured by Fujifilm Co., Ltd., TD80UL), and dried for 30 seconds at 70°C and wind speed of 5m/s After an hour, ultraviolet rays were irradiated in a nitrogen atmosphere (oxygen concentration of 200 ppm or less) so that the cumulative light amount became 100 mJ/cm ² to form a concavo-convex layer, and an optical sheet was obtained. The film thickness of the uneven layer is 2.5 μm.

<凹凸層塗佈液B1> <Concavo-convex layer coating liquid B1>

‧新戊四醇三丙烯酸酯100份 ‧100 parts of neopentylerythritol triacrylate

(日本化藥公司製造，KAYARAD-PET-30) (Manufactured by Nippon Kayaku Co., Ltd., KAYARAD-PET-30)

‧無機粒子14份 ‧14 parts of inorganic particles

(富士西利西亞化學(股)製造，非晶形矽石) (Manufactured by Fuji Silica Chemical Co., Ltd., amorphous silica)

(疏水處理，矽烷偶合劑，平均凝集粒徑2μm) (Hydrophobic treatment, silane coupling agent, average aggregate particle size 2μm)

‧光聚合起始劑5份 ‧5 parts of photopolymerization initiator

(BASF公司製造，Irgacure184) (Manufactured by BASF, Irgacure184)

‧聚矽氧系調平劑0.2份 ‧Polysiloxane-based leveling agent 0.2 part

(摩曼帝夫特性材料公司製造TSF4460) (TSF4460 manufactured by Momandif Specialty Materials Co., Ltd.)

‧脫模劑2份 ‧2 parts of release agent

(大金工業(股)製造，OPTOOL DAC) (Manufactured by Daikin Industrial Co., Ltd., OPTOOL DAC)

‧溶劑1(甲苯)150份 ‧150 parts of solvent 1 (toluene)

‧溶劑2(MIBK)35份 ‧35 parts of solvent 2 (MIBK)

[實施例B2] [Example B2]

將實施例B1之凹凸層塗佈液B1變更為下述配方之凹凸層塗佈液B2，且將凹凸層之膜厚設為4μm，除此以外，以與實施例B1相同之方式獲得光學片。 The uneven layer coating liquid B1 of Example B1 was changed to the uneven layer coating liquid B2 of the following formulation, and the film thickness of the uneven layer was set to 4 μm, except that the optical sheet was obtained in the same manner as in Example B1 .

<凹凸層塗佈液B2> <Concavo-convex layer coating liquid B2>

‧新戊四醇四丙烯酸酯100份 ‧100 parts of neopentylerythritol tetraacrylate

(共榮社化學(股)製造，Light acrylate PE-4) (Manufactured by Kyoeisha Chemical Co., Ltd., Light acrylate PE-4)

‧非晶形矽石粒子(疏水處理：矽烷偶合劑)3份 ‧Amorphous silica particles (hydrophobic treatment: silane coupling agent) 3 parts

(富士西利西亞化學(股)製造，平均凝集粒徑3μm) (Manufactured by Fuji Silesia Chemical Co., Ltd., with an average agglomerated particle size of 3μm)

‧非晶形矽石粒子(疏水處理：矽烷偶合劑)3份 ‧Amorphous silica particles (hydrophobic treatment: silane coupling agent) 3 parts

(富士西利西亞化學(股)製造，平均凝集粒徑1.5μm) (Manufactured by Fuji Silesia Chemical Co., Ltd., average agglomerated particle size 1.5μm)

‧光聚合起始劑3份 ‧3 parts of photopolymerization initiator

(BASF公司製造，Irgacure184) (Manufactured by BASF, Irgacure184)

‧聚矽氧系調平劑：聚醚改性聚矽氧烷0.2份 ‧Polysiloxane leveling agent: 0.2 part of polyether modified polysiloxane

(Shin-Etsu Silicones(股)製造，KF6004) (Manufactured by Shin-Etsu Silicones Co., Ltd., KF6004)

‧溶劑(甲苯)150份 ‧150 parts of solvent (toluene)

[比較例B1] [Comparative Example B1]

將實施例B1之凹凸層塗佈液B1變更為下述配方之凹凸層塗佈液B3，且將凹凸層之膜厚設為7μm，除此以外，以與實施例B1相同之方式獲得光學片。 The uneven layer coating liquid B1 of Example B1 was changed to the uneven layer coating liquid B3 of the following formulation, and the film thickness of the uneven layer was set to 7 μm, except that the optical sheet was obtained in the same manner as in Example B1 .

<凹凸層塗佈液B3> <Concavo-convex layer coating liquid B3>

‧二-三羥甲基丙烷四丙烯酸酯55份 ‧55 parts of di-trimethylolpropane tetraacrylate

(SARTOMER公司製造，SR355) (Manufactured by SARTOMER, SR355)

‧光聚合起始劑3份 ‧3 parts of photopolymerization initiator

(BASF公司製造、Irgacure184) (Manufactured by BASF Corporation, Irgacure184)

‧聚矽氧系調平劑0.25份 ‧Polysiloxane-based leveling agent 0.25 parts

(摩曼帝夫特性材料公司製造，TSF4460) (Manufactured by Momandif Specialty Materials Co., Ltd., TSF4460)

‧球狀聚丙烯酸-苯乙烯共聚物粒子10份 ‧10 parts of spherical polyacrylic acid-styrene copolymer particles

(平均粒徑6μm，折射率1.52) (Average particle size 6μm, refractive index 1.52)

‧膠體二氧化矽微粒子(反應性之疏水處理)100份 ‧100 parts of colloidal silica particles (reactive hydrophobic treatment)

(日產化學工業(股)製造，溶劑MIBK，固形物成分30%)(平均粒徑10~15nm) (Manufactured by Nissan Chemical Industry Co., Ltd., solvent MIBK, solid content 30%) (average particle size 10-15nm)

‧溶劑(MIBK)110份 ‧110 parts of solvent (MIBK)

[比較例B2] [Comparative Example B2]

將實施例B1之凹凸層塗佈液B1變更為下述配方之凹凸層塗佈液B4，且將凹凸層之膜厚設為7μm，除此以外，以與實施例B1相同之方式獲得光學片。 The uneven layer coating liquid B1 of Example B1 was changed to the uneven layer coating liquid B4 of the following formulation, and the film thickness of the uneven layer was set to 7 μm, except that the optical sheet was obtained in the same manner as in Example B1 .

<凹凸層塗佈液B4> <Concavo-convex layer coating liquid B4>

‧多官能丙烯酸酯低聚物60份 ‧60 parts of multifunctional acrylate oligomer

(日本合成化學工業(股)製造，UV7640B官能基數6~7) (Manufactured by Nippon Synthetic Chemical Industry Co., Ltd., UV7640B functional group number 6~7)

‧光聚合起始劑3份 ‧3 parts of photopolymerization initiator

(BASF公司製造，Irgacure184) (Manufactured by BASF, Irgacure184)

‧聚矽氧系調平劑：聚酯改性聚二甲基矽氧烷0.2份 ‧Polysiloxane leveling agent: 0.2 part of polyester modified polydimethylsiloxane

(BYK-CHEMIE公司製造，BYK370) (Manufactured by BYK-CHEMIE, BYK370)

‧球狀聚丙烯酸-苯乙烯共聚物粒子16份 ‧Spherical polyacrylic acid-styrene copolymer particles 16 parts

(平均粒徑3.5μm，折射率1.52) (Average particle size 3.5μm, refractive index 1.52)

‧燻矽微粒子(疏水處理：辛基矽烷處理)6份 ‧Smoked silicon particles (hydrophobic treatment: octyl silane treatment) 6 parts

(日本艾羅技(股)製造，平均粒徑10~15nm) (Manufactured by Airotech Co., Ltd., with an average particle size of 10~15nm)

‧溶劑1(甲苯)135份 ‧Solvent 1 (toluene) 135 parts

[比較例B3] [Comparative Example B3]

將實施例B1之凹凸層塗佈液B1變更為下述配方之凹凸層塗佈液B5，且將凹凸層之膜厚設為4μm，除此以外，以與實施例B1相同之方式獲得光學片。 The uneven layer coating liquid B1 of Example B1 was changed to the uneven layer coating liquid B5 of the following formulation, and the film thickness of the uneven layer was set to 4 μm, except that the optical sheet was obtained in the same manner as in Example B1 .

<凹凸層塗佈液B5> <Concavo-convex layer coating liquid B5>

‧脂肪族聚酯骨架6官能丙烯酸胺基甲酸酯100份 ‧Aliphatic polyester skeleton 6-functional acrylic urethane 100 parts

(SARTOMER公司製造，CN968) (Manufactured by SARTOMER, CN968)

‧球狀聚丙烯酸-苯乙烯共聚物粒子3份 ‧3 parts of spherical polyacrylic acid-styrene copolymer particles

(平均粒徑2.5μm，折射率1.52) (Average particle size 2.5μm, refractive index 1.52)

‧燻矽微粒子(疏水處理：甲基)3份 ‧Smoked silicon particles (hydrophobic treatment: methyl) 3 parts

(日本艾羅技(股)製造，平均粒徑10~15nm) (Manufactured by Airotech Co., Ltd., with an average particle size of 10~15nm)

‧光聚合起始劑3份 ‧3 parts of photopolymerization initiator

(BASF公司製造，Irgacure184) (Manufactured by BASF, Irgacure184)

‧聚矽氧系調平劑：聚醚改性聚矽氧烷0.2份 ‧Polysiloxane leveling agent: 0.2 part of polyether modified polysiloxane

(Shin-Etsu Silicones(股)製造，KF6004) (Manufactured by Shin-Etsu Silicones Co., Ltd., KF6004)

‧溶劑1(甲苯)150份 ‧150 parts of solvent 1 (toluene)

‧溶劑2(MIBK)35份 ‧35 parts of solvent 2 (MIBK)

[比較例B4] [Comparative Example B4]

將實施例B1之凹凸層塗佈液B1變更為下述配方之凹凸層塗佈液B6，將凹凸層之膜厚設為3.8μm，除此以外，以與實施例B1相同之方式獲得光學片。 The uneven layer coating liquid B1 of Example B1 was changed to the uneven layer coating liquid B6 of the following formulation, and the film thickness of the uneven layer was set to 3.8 μm, except that the optical sheet was obtained in the same manner as in Example B1 .

<凹凸層塗佈液B6> <Concavo-convex layer coating liquid B6>

‧新戊四醇四丙烯酸酯100份 ‧100 parts of neopentylerythritol tetraacrylate

(共榮社化學(股)製造，Light acrylate PE-4A) (Manufactured by Kyoeisha Chemical Co., Ltd., Light acrylate PE-4A)

‧非晶形矽石粒子(疏水處理：矽烷偶合劑)10份 ‧Amorphous silica particles (hydrophobic treatment: silane coupling agent) 10 parts

(富士西利西亞化學(股)製造，平均凝集粒徑3.5μm) (Manufactured by Fuji Silesia Chemical Co., Ltd., with an average agglomerated particle size of 3.5μm)

‧非晶形矽石粒子(疏水處理：矽烷偶合劑)8份 ‧Amorphous silica particles (hydrophobic treatment: silane coupling agent) 8 parts

(富士西利西亞化學(股)製造，平均凝集粒徑2μm) (Manufactured by Fuji Silesia Chemical Co., Ltd., with an average agglomerated particle size of 2μm)

‧光聚合起始劑3份 ‧3 parts of photopolymerization initiator

(BASF公司製造，Irgacure184) (Manufactured by BASF, Irgacure184)

‧聚矽氧系調平劑：聚醚改性聚矽氧烷0.3份 ‧Polysiloxane leveling agent: 0.3 parts of polyether modified polysiloxane

(Shin-Etsu Silicones(股)製造，KF6004) (Manufactured by Shin-Etsu Silicones Co., Ltd., KF6004)

‧溶劑(甲苯)150份 ‧150 parts of solvent (toluene)

[比較例B5] [Comparative Example B5]

將實施例B1之凹凸層塗佈液B1變更為下述配方之凹凸層塗佈液B7，將凹凸層之膜厚設為4μm，除此以外，以與實施例B1相同之方式獲得光學片。 The uneven layer coating liquid B1 of Example B1 was changed to the uneven layer coating liquid B7 of the following formulation, and the film thickness of the uneven layer was 4 μm, except that the optical sheet was obtained in the same manner as in Example B1.

<凹凸層塗佈液B7> <Concavo-convex layer coating liquid B7>

‧新戊四醇四丙烯酸酯100份 ‧100 parts of neopentylerythritol tetraacrylate

(共榮社化學(股)製造，Light acrylate PE-4A) (Manufactured by Kyoeisha Chemical Co., Ltd., Light acrylate PE-4A)

‧非晶形矽石粒子(疏水處理：矽烷偶合劑)2份 ‧Amorphous silica particles (hydrophobic treatment: silane coupling agent) 2 parts

(富士西利西亞化學(股)製造，平均凝集粒徑3μm) (Manufactured by Fuji Silesia Chemical Co., Ltd., with an average agglomerated particle size of 3μm)

‧光聚合起始劑3份 ‧3 parts of photopolymerization initiator

(BASF公司製造，Irgacure184) (Manufactured by BASF, Irgacure184)

‧聚矽氧系調平劑：聚醚改性聚矽氧烷0.2份 ‧Polysiloxane leveling agent: 0.2 part of polyether modified polysiloxane

(Shin-Etsu Silicones(股)製造，X-22-2516) (Manufactured by Shin-Etsu Silicones Co., Ltd., X-22-2516)

‧溶劑(甲苯)150份 ‧150 parts of solvent (toluene)

根據表3之結果可知，實施例B1之光學片可賦予戶外防眩性，並且可使操作性變得良好。又，解析性亦良好。 According to the results in Table 3, it can be seen that the optical sheet of Example B1 can impart outdoor anti-glare properties and can improve the operability. In addition, the resolution is also good.

B3.觸控面板之製作 B3. Production of touch panel

於實施例B1、B2及比較例B1~B5之光學片之透明基材側利用濺鍍法形成厚度20nm之ITO導電性膜，而製成上部電極板。繼而，於厚度1mm之強化玻璃板之一面利用濺鍍法形成厚度約20nm之ITO導電性膜，而製成下部電極板。繼而，藉由網版印刷法，將作為間隔件用塗佈液之游離輻射硬化型樹脂(Dot Cure TR5903：太陽油墨公司)點狀地印刷至下部電極板之具有導電性膜之面後，利用高壓水銀燈照射紫外線，且使直徑50μm、高度8μm之間隔件以1mm之間隔排列。 On the transparent substrate side of the optical sheets of Examples B1, B2 and Comparative Examples B1 to B5, an ITO conductive film with a thickness of 20 nm was formed by a sputtering method to form an upper electrode plate. Then, an ITO conductive film with a thickness of about 20 nm was formed on one surface of a strengthened glass plate with a thickness of 1 mm by a sputtering method to form a lower electrode plate. Then, by the screen printing method, the ionizing radiation curable resin (Dot Cure TR5903: Sun Ink Co., Ltd.) as a coating liquid for spacers was printed in dots on the conductive film surface of the lower electrode plate, and then used The high-pressure mercury lamp irradiates ultraviolet rays, and spacers with a diameter of 50 μm and a height of 8 μm are arranged at intervals of 1 mm.

繼而，使上部電極板與下部電極板以使導電性膜彼此對向之方式進行配置，用厚度30μm、寬度3mm之雙面膠帶將邊緣進行接著，而製作實施例B1、B2及比較例B1~B5之電阻膜式觸控面板。 Then, the upper electrode plate and the lower electrode plate were arranged such that the conductive films were opposed to each other, and the edges were bonded with a double-sided tape having a thickness of 30 μm and a width of 3 mm to produce Examples B1, B2, and Comparative Examples B1~ B5 resistive film type touch panel.

實施例B1及B2之電阻膜式觸控面板具有戶外防眩性，並且操作性及解析性良好。 The resistive film type touch panels of Examples B1 and B2 have outdoor anti-glare properties, and have good operability and resolution.

B4.顯示裝置(1)之製作 B4. Production of display device (1)

將實施例B1、B2及比較例B1~B5之光學片、與市售之超高清液晶顯示裝置(4.7英吋，像素密度約320ppi)之表面玻璃板經由透明黏著劑進行貼合，而製作實施例B1、B2及比較例B1~B5之顯示裝置(1)。再者，於貼合時，使光學片之凹凸面朝向與顯示元件相反側。 The optical sheets of Examples B1, B2, and Comparative Examples B1 to B5, and the surface glass plate of a commercially available ultra-high-definition liquid crystal display device (4.7 inches, pixel density about 320ppi) were bonded through a transparent adhesive to produce and implement The display devices (1) of Examples B1, B2 and Comparative Examples B1 to B5. Furthermore, when bonding, the uneven surface of the optical sheet is directed to the side opposite to the display element.

利用目視評價所獲得之顯示裝置(1)有無炫光，結果關於實施例B1及B2之顯示裝置(1)，炫光得到抑制，外部光之映入亦較少，辨認性良好。 又，實施例B1之顯示裝置(1)亦不會損害超高清影像之解析度。 The display device (1) obtained by visual evaluation was used to evaluate the presence or absence of glare. As a result, with respect to the display devices (1) of Examples B1 and B2, glare was suppressed, the reflection of external light was less, and the visibility was good. In addition, the display device (1) of the embodiment B1 will not impair the resolution of the ultra-high-definition image.

B5.顯示裝置(2)之製作 B5. Production of display device (2)

將實施例B1、B2及比較例B1~B5之光學片之基材變更為厚度50μm之聚對酞酸乙二酯膜(延遲值2,500nm)，除此以外，以與實施例B1、B2及比較例B1~B5相同之方式，製作實施例B3、B4及比較例B6~B10之光學片。實施例B3、B4及比較例B6~B10之光學片之表3之各物性值係與實施例B1、B2及比較例B1~B5大致相同。 The base material of the optical sheets of Examples B1, B2 and Comparative Examples B1 to B5 was changed to a polyethylene terephthalate film with a thickness of 50 μm (retardation value 2,500 nm). Otherwise, the same as those of Examples B1, B2 and In the same manner as in Comparative Examples B1 to B5, optical sheets of Examples B3 and B4 and Comparative Examples B6 to B10 were produced. The physical property values in Table 3 of the optical sheets of Examples B3, B4 and Comparative Examples B6 to B10 are approximately the same as those of Examples B1 and B2 and Comparative Examples B1 to B5.

將實施例B3、B4及比較例B6~B10之光學片、與具備微腔構造之三色獨立方式之有機EL顯示元件上具有偏光元件的市售有機EL顯示裝置(基於CIE-xy色度圖之BT.2020之覆蓋率：77%)的表面玻璃板經由透明黏著劑進行貼合，而製作實施例B3、B4及比較例B6~B10之顯示裝置(2)。再者，於貼合時，使光學片之凹凸面朝向與顯示元件相反側。 Combining the optical sheets of Examples B3, B4 and Comparative Examples B6 to B10, and the organic EL display element of the three-color independent method with a microcavity structure, a commercially available organic EL display device with a polarizing element (based on the CIE-xy chromaticity diagram) Coverage of BT.2020: 77%) surface glass plates were pasted through a transparent adhesive to fabricate display devices (2) of Examples B3, B4 and Comparative Examples B6 to B10. Furthermore, when bonding, the uneven surface of the optical sheet is directed to the side opposite to the display element.

[顯示裝置(2)之評價] [Evaluation of Display Device (2)]

<漸變色之色不均> <The uneven color of the gradient>

將顯示裝置(2)之畫面進行白顯示或大致白顯示。經由偏光太陽眼鏡自各種角度目視觀察畫面，評價是否可辨認漸變色之色不均。20人以如下評價標準進行評價：將漸變色之色不均無法辨認者設為2分，將漸變色之色不均可極少地辨認到，但不會妨礙圖像品質者設為1分，將漸變色之色不均被清晰地辨認到，會嚴重地妨礙圖像品質者設為0分。將20人之平均分數為1.7分以上者設為A，將1.4分以上且未達1.7分者設為B，將1.0分以上且未達1.4分者設為C，將未達1.0分者設為D。將結果示於表4。 The screen of the display device (2) is displayed in white or almost white. Observe the picture visually from various angles through polarized sunglasses to evaluate whether the uneven color of the gradual color can be recognized. Twenty people evaluated with the following evaluation criteria: 2 points are set for those who cannot recognize the uneven color of the gradation, and 1 points for those who cannot recognize the uneven color of the gradation but do not hinder the image quality. Set the color unevenness of the gradation color to be clearly recognized, which will seriously hinder the image quality as 0 points. The average score of 20 people is 1.7 or higher as A, 1.4 or higher and less than 1.7 as B, 1.0 or more and less than 1.4 as C, and 1.0 as less than For D. The results are shown in Table 4.

構成顯示裝置(2)之顯示元件係色域極廣，容易產生漸變 色之色不均者。然而，實施例B3之顯示裝置(2)由於具有Ra大，且具有適度之無規性之凹凸形狀，故而漸變色之色不均幾乎完全無法辨認。 The display elements constituting the display device (2) have a very wide color gamut, which is easy to produce gradation Those with uneven color. However, since the display device (2) of Example B3 has a large Ra and a moderately random uneven shape, the color unevenness of the gradation color is almost completely unrecognizable.

1‧‧‧電阻膜式觸控面板 1‧‧‧Resistive film touch panel

11‧‧‧透明基板 11‧‧‧Transparent substrate

12‧‧‧透明導電膜 12‧‧‧Transparent conductive film

13‧‧‧間隔件 13‧‧‧Spacer

Claims (9)

一種觸控面板，於操作者側之表面具有凹凸，該凹凸滿足以下之條件(B1)及(B2)，條件(B1)：使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於該凹凸，對該刮針施加垂直負載Tg，且同時使該刮針以5mm/秒之速度進行單程長度為10mm之往返1次，測量此時作用於該刮針之靜摩擦係數μs及動摩擦係數μk；於以該靜摩擦係數μs與該動摩擦係數μk之比(μs/μk)為縱軸，以該垂直負載Tg為橫軸繪製而成之圖中，將位於垂直負載100~1000g之範圍的曲線藉由最小平方法以一次直線近似時，該一次直線之斜率為負；條件(B2)：關於該凹凸，將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra_2.5)為0.10μm以上0.60μm以下。 A touch panel with irregularities on the surface of the operator side, and the irregularities satisfy the following conditions (B1) and (B2). Condition (B1): A sapphire squeegee with a tip radius of 0.3mm is vertically in contact with the irregularities , Apply a vertical load Tg to the squeegee needle, and at the same time make the squeegee needle perform a round trip with a single pass length of 10mm at a speed of 5mm/s, measure the static friction coefficient μs and the dynamic friction coefficient μk acting on the squeegee needle at this time; Take the ratio of the static friction coefficient μs to the dynamic friction coefficient μk (μs/μk) as the vertical axis, and draw the vertical load Tg as the horizontal axis. The curve in the range of the vertical load 100~1000g is maximized When the Kodaira method is approximated by a straight line, the slope of the straight line is negative; condition (B2): Regarding the unevenness, the arithmetic average roughness (Ra _2.5 ) of JIS B0601: 1994 when the cut-off value is set to 2.5 mm is 0.10 μm Above 0.60μm or less. 如申請專利範圍第1項之觸控面板，其中，關於該凹凸，將截止值設為0.8mm時之JIS B0601：1994的十點平均粗糙度(Rz_0.8)與將截止值設為2.5mm時之JIS B0601：1994的十點平均粗糙度(Rz_2.5)滿足以下之條件(B3)，Rz_0.8/(Rz_2.5-Rz_0.8)≦3.2 (B3)。 For example, the first touch panel in the scope of the patent application, in which, regarding the unevenness, the ten-point average roughness (Rz _0.8 ) of JIS B0601: 1994 when the cut-off value is set to 0.8mm and when the cut-off value is set to 2.5mm The JIS B0601: 1994 ten-point average roughness (Rz _2.5 ) satisfies the following condition (B3), Rz _0.8 /(Rz _2.5 -Rz _0.8 )≦3.2 (B3). 如申請專利範圍第1或2項之觸控面板，其中，關於該凹凸，將截止值設為2.5mm時之JIS B0601：1994的最大高度(Ry_2.5)與將截止值設為2.5mm時之JIS B0601：1994的十點平均粗糙度(Rz_2.5)滿足以下之條件(B6)，Ry_2.5/Rz_2.5≦1.5 (B6)。 For example, the touch panel of item 1 or 2 of the scope of patent application, in which, with regard to the unevenness, the maximum height of JIS B0601: 1994 when the cut-off value is set to 2.5mm (Ry _2.5 ) and the cut-off value is set to 2.5mm JIS B0601: 1994 ten-point average roughness (Rz _2.5 ) satisfies the following condition (B6), Ry _2.5 /Rz _2.5 ≦1.5 (B6). 如申請專利範圍第3項之觸控面板，其中，關於該凹凸，將截止值設為2.5mm時之凹凸的平均傾斜角(θ a_2.5)與該Ry_2.5/Rz_2.5滿足以下之條件(B7)，0.8≦θ a_2.5/(Ry_2.5/Rz_2.5)≦5.0 (B7)。 For example, the touch panel of item 3 of the scope of patent application, in which, regarding the unevenness, the average inclination angle of the unevenness (θ a _2.5 ) when the cut-off value is set to 2.5 mm and the Ry _2.5 /Rz _2.5 satisfy the following conditions (B7 ), 0.8≦θ a _2.5 /(Ry _2.5 /Rz _2.5 )≦5.0 (B7). 如申請專利範圍第1或2項之觸控面板，其中，該凹凸被設置於光學片之一面。 For example, the touch panel of item 1 or 2 of the scope of patent application, wherein the concavities and convexities are arranged on one surface of the optical sheet. 如申請專利範圍第5項之觸控面板，其中，該光學片具備延遲值超過0nm且未達3,000nm之透明基材。 For example, the touch panel of item 5 of the scope of patent application, wherein the optical sheet has a transparent substrate with a retardation value of more than 0 nm and less than 3,000 nm. 一種顯示裝置，於顯示元件之出射面側的最表面具有凹凸，該凹凸滿足以下之條件(B1)及(B2)，條件(B1)：使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於該凹凸，對該刮針施加垂直負載Tg，且同時使該刮針以5mm/秒之速度進行單程長度為10mm之往返1次，測量此時作用於該刮針之靜摩擦係數μs及動摩擦係數μk；於以該靜摩擦係數μs與該動摩擦係數μk之比(μs/μk)為縱軸，以該垂直負載Tg為橫軸繪製而成之圖中，將位於垂直負載100~1000g之範圍的曲線藉由最小平方法以一次直線近似時，該一次直線之斜率為負；條件(B2)：關於該凹凸，將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra_2.5)為0.10μm以上0.60μm以下。 A display device that has unevenness on the outermost surface of the exit surface side of the display element, and the unevenness satisfies the following conditions (B1) and (B2). Condition (B1): a sapphire needle with a tip radius of 0.3mm is vertically in contact Apply the vertical load Tg to the squeegee needle, and at the same time make the squeegee needle go back and forth with a single pass length of 10mm at a speed of 5mm/sec, measure the static friction coefficient μs and the dynamic friction coefficient acting on the squeegee needle at this time μk; in the graph drawn by taking the ratio of the static friction coefficient μs to the dynamic friction coefficient μk (μs/μk) as the vertical axis and the vertical load Tg as the horizontal axis, the curve in the range of the vertical load 100~1000g When approximating a straight line by the least square method, the slope of the straight line is negative; Condition (B2): Regarding the unevenness, the cut-off value is set to 2.5mm, JIS B0601: 1994 arithmetic average roughness (Ra _2.5 ) It is 0.10 μm or more and 0.60 μm or less. 一種光學片，於一面具有凹凸，該凹凸滿足以下之條件(B1)及(B2)，條件(B1)：使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於該凹凸，對該刮針施加垂直負載Tg，且同時使該刮針以5mm/秒之速度 進行單程長度為10mm之往返1次，測量此時作用於該刮針之靜摩擦係數μs及動摩擦係數μk；於將該靜摩擦係數μs與該動摩擦係數μk之比(μs/μk)設為縱軸，將該垂直負載Tg設為橫軸繪製而成之圖中，將位於垂直負載100~1000g之範圍的曲線藉由最小平方法以一次直線近似時，該一次直線之斜率為負；條件(B2)：關於該凹凸，將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra_2.5)為0.10μm以上0.60μm以下。 An optical sheet having unevenness on one surface that satisfies the following conditions (B1) and (B2). Condition (B1): a sapphire needle with a tip radius of 0.3 mm is vertically in contact with the unevenness, and the needle Apply a vertical load Tg, and at the same time make the scraping needle perform a round trip with a single pass length of 10mm at a speed of 5mm/sec. At this time, measure the static friction coefficient μs and the dynamic friction coefficient μk acting on the scraping needle; the static friction coefficient μs The ratio (μs/μk) to the coefficient of dynamic friction μk is set on the vertical axis, and the vertical load Tg is set on the horizontal axis to draw the graph. The curve in the range of the vertical load 100~1000g is drawn by the least square method When a straight line is approximated, the slope of the straight line is negative; Condition (B2): Regarding the unevenness, the arithmetic average roughness (Ra _2.5 ) of JIS B0601: 1994 when the cut-off value is set to 2.5 mm is 0.10 μm or more and 0.60 μm the following. 一種光學片之篩選方法，其選定一面具有凹凸，該凹凸滿足以下之條件(B1)及(B2)的光學片作為位於觸控面板之最上部的光學片，條件(B1)：使前端半徑0.3mm之藍寶石製的刮針垂直地接觸於該凹凸，對該刮針施加垂直負載Tg，且同時使該刮針以5mm/秒之速度進行單程長度為10mm之往返1次，測量此時作用於該刮針之靜摩擦係數μs及動摩擦係數μk；於以該靜摩擦係數μs與該動摩擦係數μk之比(μs/μk)為縱軸，以該垂直負載Tg為橫軸繪製而成之圖中，將位於垂直負載100~1000g之範圍的曲線藉由最小平方法以一次直線近似時，該一次直線之斜率為負；條件(B2)：關於該凹凸，將截止值設為2.5mm時之JIS B0601：1994的算術平均粗糙度(Ra_2.5)為0.10μm以上0.60μm以下。 A method for screening optical sheets, which selects one surface with unevenness, and the unevenness satisfies the following conditions (B1) and (B2) as the optical sheet located on the uppermost part of the touch panel. Condition (B1): make the tip radius 0.3 A sapphire needle made of mm sapphire is vertically in contact with the unevenness, a vertical load Tg is applied to the needle, and at the same time, the needle is made to make a round trip of 10mm in a single pass at a speed of 5mm/sec. The measurement acts on the The static friction coefficient μs and the dynamic friction coefficient μk of the scraper; in the graph drawn with the ratio of the static friction coefficient μs to the dynamic friction coefficient μk (μs/μk) as the vertical axis and the vertical load Tg as the horizontal axis, the When the curve in the range of vertical load 100~1000g is approximated by a straight line by the least square method, the slope of the straight line is negative; condition (B2): Regarding the unevenness, JIS B0601 when the cut-off value is set to 2.5mm: The arithmetic average roughness (Ra _2.5 ) of 1994 is 0.10 μm or more and 0.60 μm or less.

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