TWI684023B - Optical film for improving contrast ratio, polarizing plate comprising the same and liquid crystal display apparatus comprising the same - Google Patents
Optical film for improving contrast ratio, polarizing plate comprising the same and liquid crystal display apparatus comprising the same Download PDFInfo
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- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
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Abstract
Description
本發明是關於一種改善對比率的光學膜、一種包含所述光學膜的偏光板以及一種包含上述的液晶顯示裝置。 The present invention relates to an optical film with improved contrast ratio, a polarizing plate including the optical film, and a liquid crystal display device including the above.
本申請案主張在韓國智慧財產局於2017年8月28日申請的韓國專利申請案第10-2017-0108881號及2018年7月24日申請的韓國專利申請案第10-2018-0086250號的權益，所述申請案的全部揭露內容以引用的方式併入本文中。 This application claims the Korean Patent Application No. 10-2017-0108881 filed with the Korean Intellectual Property Office on August 28, 2017 and the Korean Patent Application No. 10-2018-0086250 filed on July 24, 2018. For rights and interests, the entire disclosure content of the application is incorporated herein by reference.
液晶顯示裝置經操作以在自背光單元接收光之後經由兩個偏光板發射光。因此，就色彩品質、對比率以及觀視角度而言，液晶顯示裝置的螢幕在其側向方向上比在其正面方向上具有更低特性。 The liquid crystal display device is operated to emit light via two polarizing plates after receiving light from the backlight unit. Therefore, in terms of color quality, contrast ratio, and viewing angle, the screen of the liquid crystal display device has lower characteristics in its lateral direction than in its front direction.
為改善液晶顯示裝置的側面處的色彩品質、對比率以及觀視角度，經由修改液晶面板或液晶結構而作出了各種嘗試。然而，經由修改液晶面板來改善具有限制性且需要複雜的製程。在 VA型液晶顯示裝置中，較窄觀視角度的缺點隨著液晶顯示裝置的大小增大而變得明顯。為解決此問題，可提供用於內部漫射的圖案結構來加寬觀視角度，藉此改善可視性。 In order to improve the color quality, contrast ratio and viewing angle at the side of the liquid crystal display device, various attempts have been made by modifying the liquid crystal panel or the liquid crystal structure. However, modifying the liquid crystal panel to improve the restrictive and complicated process is required. in In the VA type liquid crystal display device, the disadvantage of a narrow viewing angle becomes obvious as the size of the liquid crystal display device increases. To solve this problem, a pattern structure for internal diffusion can be provided to widen the viewing angle, thereby improving visibility.
可將改善對比率的光學膜提供至觀視器側處的偏光板，以便改善觀視角度。另外，在將改善對比率的光學膜安裝於偏光板上的情況下，可將具有表面粗糙度的防眩膜安裝於改善對比率的光學膜上來提供關於外部光的防眩效果。典型的防眩膜由基質(matrix)及防眩粒子(例如分佈於基質上的珠粒)構成，且可基於基質與防眩粒子之間的折射率的差來調節內混濁度(haze)及外混濁度，同時實現內部光或外部光的漫射及散射。 An optical film with improved contrast ratio may be provided to the polarizing plate at the viewer side in order to improve the viewing angle. In addition, in the case where an optical film with improved contrast ratio is mounted on a polarizing plate, an anti-glare film with surface roughness may be installed on the optical film with improved contrast ratio to provide an anti-glare effect with respect to external light. A typical anti-glare film is composed of a matrix and anti-glare particles (such as beads distributed on the matrix), and the internal haze and haze can be adjusted based on the difference in refractive index between the matrix and the anti-glare particles External turbidity, at the same time realize the diffusion and scattering of internal light or external light.
然而，在防眩膜堆疊於改善對比率的光學膜上的結構中，藉由改善對比率的光學膜對可視性的改善可歸因於已穿過防眩膜的光的額外內部漫射而劣化。另外，防眩膜包含總共兩個基層，所述兩個基層包含用於防眩膜的保護層(基層)及用於改善對比率的光學膜的保護層(基層)，藉此增加偏光板的厚度。 However, in the structure where the anti-glare film is stacked on the optical film for improving the contrast ratio, the improvement in visibility by the optical film for improving the contrast ratio can be attributed to the additional internal diffusion of light that has passed through the anti-glare film. Deterioration. In addition, the anti-glare film includes a total of two base layers including a protective layer (base layer) for the anti-glare film and a protective layer (base layer) for the optical film for improving the contrast ratio, thereby increasing the polarizing plate thickness.
在日本未審查專利公開案第2006-251659號中揭露背景技術的一個實例。 An example of the background art is disclosed in Japanese Unexamined Patent Publication No. 2006-251659.
本發明的一個目的為提供一種改善對比率的光學膜，所述光學膜可藉由粒子實現散射外部光的效果，同時藉由圖案化層及間隙填充層保持對正面及側面可視性的改善。 An object of the present invention is to provide an optical film with improved contrast ratio, which can achieve the effect of scattering external light by particles, while maintaining improved visibility of front and side surfaces by a patterned layer and a gap-filling layer.
本發明的另一目的為提供一種改善對比率的光學膜，所述光學膜包含圖案化層及防眩粒子而不遭遇莫氏(Moiré)現象。 Another object of the present invention is to provide an optical film with improved contrast ratio, the optical film including a patterned layer and anti-glare particles without encountering the Moiré phenomenon.
本發明的又一目的為提供一種具有細長結構的改善對比率的光學膜。 Another object of the present invention is to provide an improved contrast ratio optical film having an elongated structure.
根據本發明的一個態樣，改善對比率的光學膜包含：保護層；以及形成於保護層上的圖案化層，其中圖案化層包含形成於其一個表面上且包含壓花光學圖案及安置於相鄰壓花光學圖案之間的扁平區段的圖案化部分，壓花光學圖案具有約55°至約90°的底角θ，且圖案化部分滿足式1，且其中改善對比率的光學膜更包含：直接毗連圖案化層的一個表面的間隙填充層，間隙填充層包含基質及含於基質中的第一粒子，基質與第一粒子之間的折射率的差的絕對值在0至0.03的範圍內，且圖案化層與間隙填充層之間的折射率的差為0.06或大於0.06。 According to one aspect of the present invention, an optical film with improved contrast ratio includes: a protective layer; and a patterned layer formed on the protective layer, wherein the patterned layer includes an embossed optical pattern formed on one surface thereof and disposed on A patterned portion of a flat section between adjacent embossed optical patterns, the embossed optical pattern has a base angle θ of about 55° to about 90°, and the patterned portion satisfies Equation 1, and wherein the optical film of the contrast ratio is improved It further includes: a gap-filling layer directly adjoining one surface of the patterned layer, the gap-filling layer includes a matrix and the first particles contained in the matrix, and the absolute value of the difference in refractive index between the matrix and the first particles is from 0 to 0.03 And the difference in refractive index between the patterned layer and the gap-fill layer is 0.06 or greater than 0.06.
(其中P為圖案化部分的間距(單位：微米)且W為壓花光學圖案的最大寬度(單位：微米)。) (Where P is the pitch (unit: micrometer) of the patterned part and W is the maximum width (unit: micrometer) of the embossed optical pattern.)
在一個實施例中，間隙填充層可包含高度為第一粒子的粒子直徑的1%至小於20%的表面粗糙度。 In one embodiment, the gap-fill layer may include a surface roughness with a height of 1% to less than 20% of the particle diameter of the first particle.
在一個實施例中，對應於圖案化層的頂部部分的第一表面與間隙填充層的最上部表面之間的最大距離可為大於0微米至15微米。 In one embodiment, the maximum distance between the first surface corresponding to the top portion of the patterned layer and the uppermost surface of the gap-fill layer may be greater than 0 microns to 15 microns.
在一個實施例中，第一粒子可具有平均粒子直徑，所述平均粒子直徑小於對應於壓花光學圖案的頂部部分的第一表面的寬度。 In one embodiment, the first particles may have an average particle diameter that is smaller than the width of the first surface corresponding to the top portion of the embossed optical pattern.
在一個實施例中，第一粒子可以1重量%(wt%)至50重 量%的量存在於間隙填充層中。 In one embodiment, the first particles may be 1% by weight (wt%) to 50% by weight An amount of% exists in the gap-fill layer.
在一個實施例中，第一粒子可包含防眩粒子。 In one embodiment, the first particles may include anti-glare particles.
在一個實施例中，壓花光學圖案的最大寬度W與扁平區段的寬度L的比率(W/L)可在0.1至3的範圍內。 In one embodiment, the ratio (W/L) of the maximum width W of the embossed optical pattern to the width L of the flat section may be in the range of 0.1 to 3.
在一個實施例中，第一粒子可由聚甲基丙烯酸甲酯(poly(methyl methacrylate))、聚苯乙烯(polystyrene)以及聚甲基丙烯酸甲酯及苯乙烯的共聚物中的至少一者形成。 In one embodiment, the first particles may be formed of at least one of poly(methyl methacrylate), polystyrene, and a copolymer of polymethyl methacrylate and styrene.
在一個實施例中，圖案化層可由用於圖案化層的組成物形成，所述組成物包含無芳族基樹脂及高折射率無機粒子。 In one embodiment, the patterned layer may be formed of a composition for the patterned layer, the composition including an aromatic-based resin and high refractive index inorganic particles.
在一個實施例中，壓花光學圖案可包含具有梯形、矩形或正方形橫截面形狀的光學圖案。 In one embodiment, the embossed optical pattern may include an optical pattern having a trapezoidal, rectangular, or square cross-sectional shape.
在一個實施例中，圖案化層可具有比間隙填充層更高的折射率。 In one embodiment, the patterned layer may have a higher refractive index than the gap-fill layer.
在一個實施例中，間隙填充層可更包含具有比第一粒子更高的折射率的第二粒子。 In one embodiment, the gap-fill layer may further include second particles having a higher refractive index than the first particles.
根據本發明的另一態樣，偏光板可包含偏光膜及安置於偏光膜上的根據本發明的改善對比率的光學膜。 According to another aspect of the present invention, the polarizing plate may include a polarizing film and an optical film according to the present invention with improved contrast ratio disposed on the polarizing film.
根據本發明的另一態樣，液晶顯示裝置可包含根據本發明的偏光板。 According to another aspect of the present invention, the liquid crystal display device may include the polarizing plate according to the present invention.
10‧‧‧光學膜 10‧‧‧Optical film
20‧‧‧偏光板 20‧‧‧ Polarizer
100‧‧‧保護層 100‧‧‧Protective layer
200‧‧‧改善對比率的層 200‧‧‧Improved contrast ratio layer
210‧‧‧圖案化層 210‧‧‧patterned layer
211‧‧‧壓花光學圖案 211‧‧‧embossed optical pattern
212‧‧‧扁平區段 212‧‧‧Flat section
213‧‧‧傾斜表面 213‧‧‧inclined surface
214‧‧‧第一表面 214‧‧‧First surface
220‧‧‧間隙填充層 220‧‧‧Gap filling layer
230‧‧‧第一粒子 230‧‧‧First particle
300‧‧‧偏光膜 300‧‧‧ Polarizing film
A、L、W‧‧‧寬度 A, L, W‧‧‧Width
H1‧‧‧高度 H1‧‧‧ Height
P‧‧‧間距 P‧‧‧spacing
θ‧‧‧底角 θ‧‧‧Bottom angle
圖1為根據本發明的一個實施例的改善對比率的光學膜的截面視圖。 FIG. 1 is a cross-sectional view of an optical film with improved contrast ratio according to an embodiment of the present invention.
圖2為根據本發明的一個實施例的偏光板的截面視圖。 2 is a cross-sectional view of a polarizing plate according to an embodiment of the present invention.
將參考隨附圖式詳細描述本發明的實施例以向所屬領域中具通常知識者提供對本發明的透徹理解。應理解，本發明可以不同方式體現且不限於以下實施例。在圖式中，為了清晰起見將省略與說明書無關的部分。在本說明書通篇中相似組件將藉由相似附圖標號表示。 The embodiments of the present invention will be described in detail with reference to the accompanying drawings to provide those with ordinary knowledge in the art with a thorough understanding of the present invention. It should be understood that the present invention can be embodied in different ways and is not limited to the following embodiments. In the drawings, parts unrelated to the description will be omitted for clarity. Similar components will be denoted by similar reference numerals throughout this specification.
在本文中，參考隨附圖式定義諸如「上部(upper)」及「下部(lower)」的空間相對術語。因此，將理解，術語「上部表面(upper suface)」可與術語「下部表面(lower surface)」可互換地使用，且當將諸如層或膜的元件提及為置放「於另一元件上(on another element)」時，其可直接置放於所述另一元件上，或可存在介入元件。另一方面，當將元件提及為「直接置放於另一元件上(placed directly on another element)」時，其間不存在介入元件。 In this article, reference is made to the accompanying drawings to define spatial relative terms such as "upper" and "lower". Therefore, it will be understood that the term "upper surface" can be used interchangeably with the term "lower surface", and when an element such as a layer or film is referred to as being placed on another element (on another element)", it may be placed directly on the other element, or there may be an intervening element. On the other hand, when an element is referred to as "placed directly on another element", there are no intervening elements in between.
在本文中，術語「水平方向(horizontal direction)」及「豎直方向(vertical direction)」分別意謂液晶顯示裝置的矩形螢幕的縱向方向及橫向方向。在本文中，「側面(side)」指代由(Φ，θ)表示的球形座標系統中θ在0°至60°的範圍內的區域，其中參考水平方向，正側面由(0°，0°)表示，左端點由(180°，90°)表示，且右端點由(0°，90°)表示。 In this document, the terms "horizontal direction" and "vertical direction" mean the longitudinal direction and the lateral direction of the rectangular screen of the liquid crystal display device, respectively. In this article, "side" refers to the area of the spherical coordinate system represented by (Φ, θ) in the range of 0° to 60°, with reference to the horizontal direction, the positive side is defined by (0°, 0 °), the left endpoint is represented by (180°, 90°), and the right endpoint is represented by (0°, 90°).
在本文中，術語「頂部部分(top portion)」指代壓花光學圖案中的最高部分。 Herein, the term "top portion" refers to the highest portion in the embossed optical pattern.
在本文中，「縱橫比(aspect ratio)」指代光學圖案的最大 高度與其最大寬度的比率(最大高度/最大寬度)。 In this article, "aspect ratio" refers to the maximum optical pattern The ratio of height to its maximum width (maximum height/maximum width).
在本文中，「間距(pitch)」意謂一個壓花光學圖案的最大寬度W與一個扁平區段的寬度L的總和。 In this article, "pitch" means the sum of the maximum width W of an embossed optical pattern and the width L of a flat section.
在本文中，「平面內延遲(in-plane retardation；Re)」為在550奈米的波長下所量測的值，且由式A表示：Re=(nx-ny)×d，其中nx及ny分別為在550奈米的波長下在對應保護層或基層的慢軸及快軸上的折射率，且d為保護層或基層的厚度(單位：奈米)。 In this article, "in-plane retardation (Re)" is a value measured at a wavelength of 550 nm, and is represented by formula A: Re=(nx-ny)×d, where nx and ny is the refractive index on the slow axis and fast axis of the corresponding protective layer or base layer at a wavelength of 550 nm, and d is the thickness of the protective layer or base layer (unit: nanometer).
在本文中，術語「甲基丙烯基((meth)acryl)」指代丙烯基及/或甲基丙烯基。 Herein, the term "(meth)acryl" refers to propenyl and/or methacryl.
在下文中，將參考圖1描述根據本發明的一個實施例的改善對比率的光學膜。圖1為根據本發明的一個實施例的改善對比率的光學膜的截面視圖。 Hereinafter, an optical film with improved contrast ratio according to an embodiment of the present invention will be described with reference to FIG. 1. FIG. 1 is a cross-sectional view of an optical film with improved contrast ratio according to an embodiment of the present invention.
參考圖1，改善對比率的光學膜10包含保護層100及形成於保護層100上的圖案化層210，且可更包含直接毗連圖案化層210的一個表面的間隙填充層220。
Referring to FIG. 1, the
保護層The protective layer
保護層100可形成於圖案化層210的一個表面上，即形成於其光入射表面上，來支撐圖案化層210。在一個實施例中，保護層可直接形成於圖案化層上來減小改善對比率的光學膜的厚度。如本文中所使用，「直接形成」意謂無某種黏著層、黏合層或黏著/黏合層***於保護層與圖案化層之間。然而，應理解，本發明不限於此。
The
保護層100可為光學透明的且可包含光入射表面及與光入射表面相對的光出射表面。圖案化層210形成於保護層100的光出射表面上。保護層100可在可見光的波長範圍中具有90%或大於90%的總透射率，例如90%至100%。在透射率的此範圍內，保護層100允許入射光穿過其到達圖案化層，而不影響入射光。
The
保護層100可為保護膜或保護塗層。
The
當保護層為保護膜時，保護層可包含光學透明樹脂膜。保護膜可經由樹脂的熔融及擠塑形成。樹脂可視需要進一步經受拉伸。光學透明樹脂可包含由下述者中選出的至少一者：包含三乙醯纖維素(triacetyl cellulose；TAC)的纖維素酯、包含非晶形環烯烴聚合物(cyclic olefin polymer；COP)的環聚烯烴樹脂、聚碳酸酯樹脂、包含聚對苯二甲酸乙二酯(polyethylene terephthalate；PET)的聚酯樹脂、聚醚碸樹脂、聚碸樹脂、聚醯胺樹脂、聚醯亞胺樹脂、非環聚烯烴樹脂、包含聚甲基丙烯酸甲酯的聚丙烯酸酯樹脂、聚乙烯醇樹脂、聚氯乙烯樹脂以及聚偏二氯乙烯樹脂。 When the protective layer is a protective film, the protective layer may include an optically transparent resin film. The protective film can be formed by resin melting and extrusion. The resin may be further stretched if necessary. The optically transparent resin may include at least one selected from the group consisting of cellulose ester containing triacetyl cellulose (TAC) and cyclic polymer containing amorphous cyclic olefin polymer (COP) Olefin resin, polycarbonate resin, polyester resin containing polyethylene terephthalate (PET), polyether resin, polyethylene resin, polyamide resin, polyimide resin, acyclic Polyolefin resin, polyacrylate resin containing polymethyl methacrylate, polyvinyl alcohol resin, polyvinyl chloride resin, and polyvinylidene chloride resin.
保護膜可為非拉伸膜、通過藉由某種方法拉伸樹脂獲得且具有某一範圍的延遲的延遲膜，或各向同性光學膜。在一個實施例中，保護膜可為具有平面內延遲Re的各向同性光學膜，所述平面內延遲Re為60奈米或小於60奈米，具體而言為0奈米至60奈米，更具體而言為40奈米至60奈米。在平面內延遲的此範圍內，保護膜可經由對觀視角度的補償來提供良好影像品質。在本文中，術語「各向同性光學膜(isotropic optical film)」意謂具有實質上相同的nx、ny以及nz的膜，且表述「實質上相同」不僅包含nx、ny以及nz完全相同的情形，且亦包含nx、ny以及nz之間存 在可接受的誤差容限的情形。在另一實施例中，保護膜可為具有60奈米或大於60奈米的平面內延遲Re的延遲膜。舉例而言，保護膜可具有60奈米至350奈米的平面內延遲Re。替代性地，保護膜可具有平面內延遲Re，所述平面內延遲Re為8,000奈米或大於8,000奈米，具體而言為10,000奈米或大於10,000奈米，更具體而言大於10,000奈米，更具體而言為10,100奈米至30,000奈米，更具體而言為10,100奈米至15,000奈米。在此範圍內，保護膜可防止虹點(rainbow spots)產生，同時使藉由改善對比率的層漫射的光進一步漫射。 The protective film may be an unstretched film, a retardation film obtained by stretching the resin by a certain method and having a certain range of retardation, or an isotropic optical film. In one embodiment, the protective film may be an isotropic optical film with an in-plane retardation Re, the in-plane retardation Re is 60 nm or less, specifically 0 nm to 60 nm, More specifically, it is 40 nm to 60 nm. Within this range of in-plane retardation, the protective film can provide good image quality through compensation for viewing angle. In this article, the term "isotropic optical film" means a film having substantially the same nx, ny, and nz, and the expression "substantially the same" includes not only the case where nx, ny, and nz are exactly the same , And also includes the storage between nx, ny and nz In the case of acceptable error tolerance. In another embodiment, the protective film may be a retardation film having an in-plane retardation Re of 60 nm or greater. For example, the protective film may have an in-plane retardation Re of 60 nm to 350 nm. Alternatively, the protective film may have an in-plane retardation Re that is 8,000 nm or greater than 8,000 nm, specifically 10,000 nm or greater than 10,000 nm, and more specifically greater than 10,000 nm , More specifically, 10,100 nm to 30,000 nm, and more specifically, 10,100 nm to 15,000 nm. Within this range, the protective film can prevent the generation of rainbow spots, while further diffusing the light diffused by the layer that improves the contrast ratio.
當保護層為保護塗層時，所述保護塗層可由包含可光化輻射固化化合物及聚合起始劑的可光化輻射固化樹脂組成物形成。可光化輻射固化化合物可包含陽離子可聚合可固化化合物、自由基可聚合可固化化合物、胺基甲酸酯樹脂(urethane resin)以及矽酮樹脂(silicone resin)中的至少一者。陽離子可聚合可固化化合物可為具有至少一個環氧基的環氧化合物，或具有至少一個氧雜環丁烷環的氧雜環丁烷化合物。環氧化合物可包含氫化環氧化合物、鏈型脂族環氧化合物、環脂族環氧化合物以及芳族環氧化合物中的至少一者。 When the protective layer is a protective coating layer, the protective coating layer may be formed of an actinic radiation curable resin composition including an actinic radiation curable compound and a polymerization initiator. The actinic radiation-curable compound may include at least one of a cationic polymerizable curable compound, a radical polymerizable curable compound, a urethane resin, and a silicone resin. The cationic polymerizable curable compound may be an epoxy compound having at least one epoxy group, or an oxetane compound having at least one oxetane ring. The epoxy compound may include at least one of a hydrogenated epoxy compound, a chain aliphatic epoxy compound, a cycloaliphatic epoxy compound, and an aromatic epoxy compound.
自由基可聚合可固化化合物的實例可包含具有至少一個甲基丙烯醯氧基的甲基丙烯酸酯單體，以及藉由使至少兩個含官能基化合物反應而獲得且具有至少兩個甲基丙烯醯氧基的甲基丙烯酸酯寡聚物。甲基丙烯酸酯單體的實例可包含具有一個甲基丙烯醯氧基的單官能甲基丙烯酸酯單體、具有兩個甲基丙烯醯氧基的雙官能甲基丙烯酸酯單體，以及具有三個或大於三個甲基丙烯 醯氧基的多官能甲基丙烯酸酯單體。甲基丙烯酸酯寡聚物的實例可包含胺基甲酸酯甲基丙烯酸酯寡聚物、聚酯甲基丙烯酸酯寡聚物以及環氧甲基丙烯酸酯寡聚物。聚合起始劑可使可光化輻射固化化合物固化。聚合起始劑可包含光學陽離子起始劑(photocationic initiator)及光敏劑(photosensitizer)中的至少一者。如光學陽離子起始劑及光敏劑，可使用所屬領域中已知的任何典型光學陽離子起始劑及任何典型光敏劑。 Examples of the radically polymerizable curable compound may include a methacrylate monomer having at least one methacryloyloxy group, and obtained by reacting at least two functional group-containing compounds and having at least two methacrylic acids Acryloyl methacrylate oligomer. Examples of the methacrylate monomer may include a monofunctional methacrylate monomer having one methacryloyloxy group, a bifunctional methacrylate monomer having two methacryloyloxy groups, and having three 3 or more methacrylic Acyloxy multifunctional methacrylate monomer. Examples of the methacrylate oligomer may include urethane methacrylate oligomer, polyester methacrylate oligomer, and epoxy methacrylate oligomer. The polymerization initiator can cure the actinic radiation-curable compound. The polymerization initiator may include at least one of an optical cationic initiator and a photosensitizer. As the optical cation starter and photosensitizer, any typical optical cation starter and any typical photosensitizer known in the art can be used.
較佳地，保護層100為非表面處理保護膜或未經受表面處理的保護塗層。如下文將詳細地描述，由於間隙填充層具有防眩效果，故改善對比率的光學膜並不需要對保護層進行表面處理，藉此簡化改善對比率的光學膜的製造製程，而不對改善對比率的光學膜的光學功能產生不利影響。
Preferably, the
保護層100可具有1.4至1.7的折射率，較佳地為1.45至1.65。
The
保護層100可具有10微米至200微米的厚度，具體而言為20微米至200微米。保護膜型的保護層100可具有20微米至250微米的厚度，較佳地為30微米至200微米，且保護塗層型的保護層100可具有5微米至50微米的厚度。在此厚度範圍內，可將保護層100用於偏光板。
The
保護層100可具有單層結構，如圖1中所繪示，或可具有至少兩個保護膜或保護層的多層結構。
The
圖案化層Patterned layer
圖案化層210形成於保護層100的光出射表面上以允許自保護層210發射的光穿過所述圖案化層出射。圖案化層210可
包含圖案化部分，所述圖案化部分形成於圖案化層210的一個表面上且包含壓花光學圖案211及形成於相鄰壓花光學圖案211之間的扁平區段212。形成於圖案化層210的一個表面上的圖案化部分直接毗連間隙填充層220。
The patterned
壓花光學圖案211可由形成於其頂部部分處的第一表面214及連接至第一表面214的至少一個傾斜表面213構成。圖案化部分滿足下式1且壓花光學圖案211具有55°至90°的底角θ。底角θ意謂在壓花光學圖案211的傾斜表面213與自壓花光學圖案211的最大寬度W延伸的假想線之間所定義的角度。此處，傾斜表面213意謂直接連接至壓花光學圖案211的扁平區段212的傾斜表面。在此範圍內，圖案化層210可同時改善正面對比率及側面對比率，可減小正面對比率與側面對比率之間的差，且可提高相同側面觀視角度處及相同正面觀視角度處的對比率。具體而言，圖案化部分可具有70°至90°的底角θ及1.2至8的P/W(P與W的比率)的值。
The embossed
儘管圖1繪示壓花光學圖案在其兩側處具有相同底角θ的結構，但壓花光學圖案仍可視需要而具有不同底角θ，只要底角θ在55°至90°的範圍內即可。舉例而言，壓花光學圖案可具有55°、56°、57°、58°、59°、60°、61°、62°、63°、64°、65°、66°、67°、68°、69°、70°、71°、72°、73°、74°、75°、76°、77°、78°、79°、 80°、81°、82°、83°、84°、85°、86°、87°、88°、89°或90°的底角θ。舉例而言，壓花光學圖案可具有1、1.1、1.2、1.3、1.4、1.5、1.6、1.7、1.8、1.9、2、3、4、5、6、7或8的比率(P/W)。 Although FIG. 1 shows a structure in which the embossed optical pattern has the same base angle θ at both sides, the embossed optical pattern may have a different base angle θ as needed, as long as the base angle θ is in the range of 55° to 90° That's it. For example, the embossed optical pattern may have 55°, 56°, 57°, 58°, 59°, 60°, 61°, 62°, 63°, 64°, 65°, 66°, 67°, 68 °, 69°, 70°, 71°, 72°, 73°, 74°, 75°, 76°, 77°, 78°, 79°, The base angle θ of 80°, 81°, 82°, 83°, 84°, 85°, 86°, 87°, 88°, 89° or 90°. For example, the embossed optical pattern may have a ratio (P/W) of 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 3, 4, 5, 6, 7, or 8 .
壓花光學圖案211可為包含形成於其頂部部分處的第一表面214及連接至第一表面214的至少一個傾斜表面213的壓花光學圖案。儘管圖1繪示兩個相鄰傾斜表面213經由第一表面214彼此連接的梯形光學圖案，但應理解，本發明不限於此。替代性地壓花光學圖案可具有矩形或正方形橫截面形狀。
The embossed
第一表面214形成於壓花光學圖案的頂部部分處，且可藉由使到達光學顯示裝置中的圖案化層210的光進一步漫射來改善觀視角度及亮度。因此，壓花光學圖案211可經由光漫射的改善來使亮度損失最小化。第一表面214為平坦表面且可使製造改善對比率的光學膜的製程便利。替代性地，第一表面214可具有精細粗糙度或彎曲表面。在第一表面214為彎曲表面的結構中，壓花光學圖案可藉由雙凸透鏡圖案來實現。參考圖1，壓花光學圖案具有梯形橫截面，其中形成於頂部部分處的第一表面為平坦表面且傾斜表面為平坦表面(例如，具有截頂三角形橫截面的截頂稜鏡圖案，即，截頂稜鏡形狀或切割稜鏡形狀)。替代性地，壓花光學圖案可具有形狀，其中第一表面形成於其頂部部分處且傾斜表面為彎曲表面(例如，具有截頂雙凸(切割雙凸)透鏡圖案或截頂微透鏡(切割微透鏡)圖案的改善對比率的層)。另外，壓花光學圖案可包含具有N邊形橫截面形狀(n為3至20的整數)的圖案，所述N邊形橫截面形狀包含矩形或正方形橫截面形狀。
The
第一表面214可平行於扁平區段212及圖案化層210的
最下部表面中的至少一者。圖1繪示壓花光學圖案211的第一表面214、扁平區段212以及圖案化層210的最下部表面彼此平行的結構。
The
第一表面214可具有0.5微米至30微米的寬度A，具體而言為1微米至15微米。在此範圍內，第一表面214可用於光學顯示裝置且可改善對比率。
The
壓花光學圖案211可具有0.1至10的縱橫比(H1/W，具體而言為0.1至7.0，更具體而言為0.1至5.0。在此範圍內，光學顯示裝置可在其側面處展現經改善的對比率及觀視角度。
The embossed
壓花光學圖案211可具有20微米或小於20微米的最大高度H1，具體而言為15微米或小於15微米，更具體而言為10微米或小於10微米。在此範圍內，光學顯示裝置可展現對比率、觀視角度以及亮度的改善，而不遭遇莫氏現象及類似者。
The embossed
壓花光學圖案211可具有20微米或小於20微米的最大寬度W，具體而言為15微米或小於15微米，更具體而言為10微米或小於10微米。在此範圍內，光學顯示裝置可展現對比率、觀視角度以及亮度的改善，而不遭遇莫氏現象及類似者。
The embossed
儘管圖1繪示圖案化部分的相鄰光學圖案具有相同底角、相同的第一表面的寬度、相同最大高度以及相同最大寬度的結構，但相鄰光學圖案可具有不同底角、不同的第一表面的寬度、不同最大高度以及不同最大寬度。 Although FIG. 1 illustrates a structure in which adjacent optical patterns of the patterned portion have the same base angle, the same width of the first surface, the same maximum height, and the same maximum width, the adjacent optical patterns may have different base angles, different first The width of a surface, different maximum heights and different maximum widths.
一旦自圖案化層210接收光，則扁平區段212將光發射至間隙填充層220，藉此改善正面亮度。
Once light is received from the patterned
壓花光學圖案211的最大寬度W與扁平區段212的寬度
L的比率(W/L)可為9或小於9，具體而言為自0.1至3，更具體而言為自0.15至2。在此範圍內，壓花光學圖案可減小正面對比率與側面對比率之間的差，同時改善相同側面觀視角度處及相同正面觀視角度處的對比率。扁平區段212可具有1微米至50微米的寬度L，具體而言為1微米至20微米。在此範圍內，壓花光學圖案可改善正面亮度。
The maximum width W of the embossed
一個壓花光學圖案211的最大寬度W及與所述光學圖案直接相鄰的扁平區段212形成一個間距P。間距P可在1微米至50微米的範圍內，具體而言為自1微米至40微米。在此範圍內，壓花光學圖案可改善亮度及對比率而不造成莫氏現象。
The maximum width W of an embossed
儘管圖1繪示圖案化部分的相鄰光學圖案具有相同間距及相同最大寬度的結構，但應理解，相鄰光學圖案可具有不同間距及不同最大寬度。 Although FIG. 1 illustrates a structure in which adjacent optical patterns of a patterned portion have the same pitch and the same maximum width, it should be understood that adjacent optical patterns may have different pitches and different maximum widths.
儘管未在圖1中清晰地繪示，但圖1繪示壓花光學圖案以條帶形狀延伸的結構。替代性地，壓花光學圖案可以點狀形成。在本文中，「點(dot)」意謂壓花光學圖案為分散的。較佳地，壓花光學圖案以條帶形狀延伸來擴大右側及左側處的觀視角度。 Although not clearly shown in FIG. 1, FIG. 1 shows a structure in which the embossed optical pattern extends in a stripe shape. Alternatively, the embossed optical pattern may be formed in dots. In this article, "dot" means that the embossed optical pattern is scattered. Preferably, the embossed optical pattern extends in a strip shape to expand the viewing angle at the right and left sides.
圖案化層210與間隙填充層220之間的折射率的差為0.06或大於0.06，較佳地為0.08至0.3，更佳地為0.08至0.2，再更佳地為0.08至0.15。在此範圍內，改善對比率的光學膜可相較於正面CR的減小而確保良好的光漫射效果。舉例而言，圖案化層210與間隙填充層220之間的折射率的差可為0.06、0.07、0.08、0.09、0.1、0.11、0.12、0.13、0.14、0.15、0.16、0.17、0.18、0.19、0.2、0.25或0.3。
The difference in refractive index between the
圖案化層210可具有1.52或大於1.52的折射率，具體而言為1.55至1.70，更具體而言為1.60至1.70。因此，光學膜可使光漫射效果最大化且可以提高的折射率來增大圖案化層與間隙填充層之間的折射率的差。
The patterned
圖案化層210可由用於圖案化層的組成物形成，所述組成物包含能夠提供如上文所闡述的折射率的熱固性樹脂及可光固化樹脂中的至少一者。
The patterned
舉例而言，圖案化層210可由含芳族基樹脂及無芳族基樹脂(非芳族樹脂)中的至少一者形成。含芳族基樹脂可包含例如含有氟或萘的樹脂，但不限於此。
For example, the patterned
圖案化層210可由用於圖案化層的組成物形成，所述組成物包含能夠提供如上文所闡述的折射率的熱固性樹脂及可光固化樹脂中的至少一者。舉例而言，用於圖案化層的組成物可包含雙官能或更高官能的甲基丙烯酸單體。
The patterned
具體而言，甲基丙烯酸單體可包含以下中的至少一者：雙官能甲基丙烯酸酯，諸如乙二醇二甲基丙烯酸酯、二乙二醇二甲基丙烯酸酯、丁二醇二甲基丙烯酸酯、己二醇二甲基丙烯酸酯、三環癸烷二甲醇二甲基丙烯酸酯、壬二醇二甲基丙烯酸酯、乙氧基化己二醇二甲基丙烯酸酯、丙氧基化己二醇二甲基丙烯酸酯、二乙二醇二甲基丙烯酸酯、聚乙二醇二甲基丙烯酸酯、三丙二醇二甲基丙烯酸酯、聚丙二醇二甲基丙烯酸酯、新戊二醇二甲基丙烯酸酯、乙氧基化新戊二醇二甲基丙烯酸酯、三丙二醇二甲基丙烯酸酯、羥基新戊酸新戊二醇二甲基丙烯酸酯以及類似者；三官能甲基丙烯酸酯，諸如三羥甲基丙烷三甲基丙烯酸酯、乙氧基化三羥甲基丙烷三甲 基丙烯酸酯、丙氧基化三羥甲基丙烷三甲基丙烯酸酯、三2-羥基乙基異氰尿酸酯三甲基丙烯酸酯、丙三醇三甲基丙烯酸酯、季戊四醇三甲基丙烯酸酯、二季戊四醇三甲基丙烯酸酯、二三羥甲基丙烷三甲基丙烯酸酯以及類似者；四官能甲基丙烯酸酯，諸如季戊四醇四甲基丙烯酸酯、二三羥甲基丙烷四甲基丙烯酸酯、二季戊四醇四甲基丙烯酸酯以及類似者；五官能甲基丙烯酸酯，諸如二季戊四醇五甲基丙烯酸酯、二三羥甲基丙烷五甲基丙烯酸酯以及類似者；以及六官能甲基丙烯酸酯，諸如二季戊四醇六甲基丙烯酸酯、二三羥甲基丙烷六甲基丙烯酸酯以及類似者。 Specifically, the methacrylic monomer may include at least one of the following: bifunctional methacrylate, such as ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, butylene glycol dimethyl Acrylate, hexanediol dimethacrylate, tricyclodecane dimethanol dimethacrylate, nonanediol dimethacrylate, ethoxylated hexanediol dimethacrylate, propoxy Hexylene glycol dimethacrylate, diethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, tripropylene glycol dimethacrylate, polypropylene glycol dimethacrylate, neopentyl glycol Dimethacrylate, ethoxylated neopentyl glycol dimethacrylate, tripropylene glycol dimethacrylate, hydroxypivalic acid neopentyl glycol dimethacrylate and the like; trifunctional methacrylic acid Esters, such as trimethylolpropane trimethacrylate, ethoxylated trimethylolpropane trimethyl Acrylate, propoxylated trimethylolpropane trimethacrylate, tri-2-hydroxyethyl isocyanurate trimethacrylate, glycerol trimethacrylate, pentaerythritol trimethacrylate Esters, dipentaerythritol trimethacrylate, ditrimethylolpropane trimethacrylate, and the like; tetrafunctional methacrylates, such as pentaerythritol tetramethacrylate, ditrimethylolpropane tetramethacrylate Esters, dipentaerythritol tetramethacrylate and the like; pentafunctional methacrylates such as dipentaerythritol pentamethacrylate, ditrimethylolpropane pentamethacrylate and the like; and hexafunctional methacrylic acid Esters, such as dipentaerythritol hexamethacrylate, ditrimethylolpropane hexamethacrylate, and the like.
圖案化層可由用於圖案化層的組成物形成，所述組成物包含能夠提供如上文所闡述的折射率的熱固性樹脂及可光固化樹脂中的至少一者以及熱固性單體及可光固化單體中的至少一者。熱固性樹脂及可光固化樹脂中的所述至少一者以及熱固性單體及可光固化單體中的所述至少一者可形成圖案化層的基質。 The patterned layer may be formed of a composition for the patterned layer, the composition including at least one of a thermosetting resin and a photocurable resin capable of providing a refractive index as explained above, and a thermosetting monomer and a photocurable monomer At least one of the body. The at least one of the thermosetting resin and the photocurable resin and the at least one of the thermosetting monomer and the photocurable monomer may form a matrix of the patterned layer.
圖案化層可由用於圖案化層的組成物形成，所述組成物包含高折射率無機粒子，例如二氧化鋯(氧化鋯)及二氧化鈦(氧化鈦)中的至少一者。包含高折射率無機粒子的用於圖案化層的組成物可在不含有含芳族基樹脂的情況下提高圖案化層的折射率，同時改善圖案化層的耐光性的可靠度。含芳族基樹脂可歸因於在長期暴露於外部UV光時發黃而遭遇耐光性可靠度的劣化。高折射率無機粒子可以10重量%至80重量%的量存在於圖案化層中，較佳地為20重量%至80重量%，更佳地為20重量%至75重量%，再更佳地為30重量%至70重量%。在此範圍內，用於圖案化層的組成物可提高折射率及圖案化層的耐光性的可靠度。 The patterned layer may be formed of a composition for the patterned layer, the composition including high refractive index inorganic particles such as at least one of zirconium dioxide (zirconia) and titanium dioxide (titanium oxide). The composition for a patterned layer containing high-refractive-index inorganic particles can increase the refractive index of the patterned layer without containing an aromatic group-containing resin, while improving the reliability of the patterned layer's light resistance. The aromatic group-containing resin can be attributed to deterioration in reliability of light resistance due to yellowing when exposed to external UV light for a long time. The high refractive index inorganic particles may be present in the patterned layer in an amount of 10% by weight to 80% by weight, preferably 20% by weight to 80% by weight, more preferably 20% by weight to 75% by weight, even more preferably 30% to 70% by weight. Within this range, the composition for the patterned layer can improve the reliability of the refractive index and the light resistance of the patterned layer.
高折射率無機粒子具有比圖案化層的基質更高的折射率，且可具有1.8或大於1.8的折射率，較佳地為2.0或大於2.0，例如2.0至3.0。在此範圍內，組成物可易於確保圖案化層的所需折射率。儘管無機粒子可包含未經受表面處理的粒子，但對無機粒子的表面處理可改善與其他組件的相容性。可在無機粒子的總體表面積的5%至50%上方對其執行表面處理。較佳地，圖案化層包含氧化鋯，此使得調節圖案化層的折射率比調節間隙填充層的折射率更容易，藉此進一步改善可視性。 The high-refractive-index inorganic particles have a higher refractive index than the matrix of the patterned layer, and may have a refractive index of 1.8 or greater, preferably 2.0 or greater, such as 2.0 to 3.0. Within this range, the composition can easily ensure the desired refractive index of the patterned layer. Although the inorganic particles may include particles that have not been subjected to surface treatment, the surface treatment of the inorganic particles can improve compatibility with other components. The surface treatment of the inorganic particles may be performed above 5% to 50% of the total surface area thereof. Preferably, the patterned layer includes zirconia, which makes it easier to adjust the refractive index of the patterned layer than the gap-filled layer, thereby further improving visibility.
高折射率無機粒子可具有1奈米至80奈米的平均粒子直徑D50，較佳地為5奈米至50奈米。可藉由所屬領域中具通常知識者熟知的典型方法來量測無機粒子的平均粒子直徑D50。在平均粒子直徑的此範圍內，高折射率無機粒子可確保在無光散射的情況下提高高折射率層的折射率。 The high-refractive-index inorganic particles may have an average particle diameter D50 of 1 nm to 80 nm, preferably 5 nm to 50 nm. The average particle diameter D50 of the inorganic particles can be measured by typical methods well known to those skilled in the art. Within this range of the average particle diameter, the high-refractive-index inorganic particles can ensure that the refractive index of the high-refractive-index layer is increased without light scattering.
用於圖案化層的組成物可更包含光起始劑及熱起始劑中的至少一者，所述光起始劑及熱起始劑藉由使組成物固化來促進圖案化層的形成。舉例而言，組成物可包含磷、三嗪、苯乙酮、二苯甲酮、噻噸酮、安息香、肟以及苯基酮起始劑中的至少一者。 The composition for the patterned layer may further include at least one of a photoinitiator and a thermal initiator, which promote the formation of the patterned layer by curing the composition . For example, the composition may include at least one of phosphorus, triazine, acetophenone, benzophenone, thioxanthone, benzoin, oxime, and phenyl ketone starter.
用於圖案化層的組成物可更包含典型添加劑，諸如脫模劑、消泡劑、流平劑、抗氧化劑、UV吸收劑以及光穩定劑。用於的圖案化層組成物可為無溶劑組成物或可更包含溶劑以便允許更容易地形成圖案化層。溶劑可選自所屬領域中的典型溶劑。 The composition for the patterned layer may further contain typical additives such as mold release agents, defoamers, leveling agents, antioxidants, UV absorbers, and light stabilizers. The patterned layer composition used may be a solvent-free composition or may further contain a solvent to allow the patterned layer to be formed more easily. The solvent may be selected from typical solvents in the art.
間隙填充層Gap filling layer
間隙填充層220直接形成於圖案化層210的一個表面上，具體而言，直接形成於圖案化層210的光出射表面上。間隙填充
層220使自圖案化層210的光出射表面所接收的光漫射，藉此進一步改善光漫射效果。
The gap-
間隙填充層220可為修平層(flattening layer)，所述修平層藉由填充圖案化層210的相鄰壓花光學圖案211之間的間隙的至少部分來將改善對比率的層200修平。
The gap-filling
在一個實施例中，間隙填充層220可完全填充圖案化層210的相鄰壓花光學圖案211之間的間隙。
In one embodiment, the
在一個實施例中，間隙填充層220的厚度可大於壓花光學圖案211的最大高度，以使得間隙填充層220可完全填充圖案化層210的相鄰壓花光學圖案211之間的間隙，同時覆蓋壓花光學圖案211的頂部部分。
In one embodiment, the thickness of the gap-
圖案化層210具有比間隙填充層220更高的折射率。由圖案化層210及間隙填充層220構成的改善對比率的層200可藉由允許經由圖案化層210的光入射表面所接收的光經由光的漫射而離開改善對比率的層200來改善側面對比率，可使正面對比率的降低最小化同時提高側面對比率，可減小正面對比率與側面對比率之間的差，且可提高相同側面觀視角度處及相同正面觀視角度處的對比率。
The patterned
間隙填充層220可具有大於0至1.53的折射率，具體而言為1.43至1.525。在折射率的此範圍內，間隙填充層與圖案化層之間的折射率的差變得較大，藉此確保良好的可視性。
The gap-
間隙填充層220可包含基質及包含於基質中的第一粒子230。第一粒子230中的至少一些暴露於間隙填充層220的表面上以形成表面粗糙度且可具有與基質相同的折射率。使用此結構，間
隙填充層藉由通過第一粒子來防止已穿過圖案化層210的光散射而不影響可視性的改善，且可經由藉由暴露於所述間隙填充層的表面上的第一粒子所形成的表面粗糙度來提供防眩效果，同時抑制莫氏現象。第一粒子230中的一些可暴露於間隙填充層220的表面上，且其他第一粒子230可分佈於壓花光學圖案之間。
The gap-
即使在第一粒子分佈於壓花光學圖案之間的結構中，第一粒子亦可具有最小內部混濁度以不對可視性改善效果產生影響，只要第一粒子與基質之間的折射率的差的絕對值屬於0至0.03的範圍內即可。 Even in the structure where the first particles are distributed between the embossed optical patterns, the first particles can have a minimum internal haze so as not to affect the visibility improvement effect, as long as the difference in refractive index between the first particles and the matrix The absolute value should be within the range of 0 to 0.03.
第一粒子230可以1重量%至50重量%的量存在於間隙填充層220中，較佳地為2重量%至40重量%，更佳地為2重量%至30重量%。在此範圍內，第一粒子形成外部粗糙度來提供散射外部光的效果。
The
在一個實施例中，包含於間隙填充層中的第一粒子的粒子直徑的1%至小於20%可暴露於間隙填充層的表面上，具體而言暴露於間隙填充層的最上部表面上，且可將間隙填充樹脂安置於第一粒子上來形成表面粗糙度。在此範圍內，間隙填充層可確保防眩效果，同時保持對自圖案化層發射的光的對比率的改善。 In one embodiment, 1% to less than 20% of the particle diameter of the first particles contained in the gap-fill layer may be exposed on the surface of the gap-fill layer, specifically on the uppermost surface of the gap-fill layer, And the gap filling resin can be placed on the first particles to form the surface roughness. Within this range, the gap-fill layer can ensure an anti-glare effect while maintaining an improvement in the contrast ratio of light emitted from the patterned layer.
在一個實施例中，對應於圖案化層210的頂部部分的第一表面214與間隙填充層220的最上部表面之間的最大距離(亦稱為「淨厚度」)可為大於0微米至15微米，較佳地為5微米至10微米。在此範圍內，間隙填充層可確保防眩效果，同時保持對自圖案化層發射的光的對比率的改善。當將習知防眩膜安裝於改善對比率的光學膜上時，自圖案化層發射的光經由構成防眩膜的
膜到達防眩粒子。根據本發明，將淨厚度設定如上且將基質與間隙填充層中的第一粒子之間的折射率的差的絕對值設定於0至0.03的範圍內，藉此經由表面粗糙度來確保防眩效果，同時保持改善側面可視性的效果。
In one embodiment, the maximum distance (also referred to as "net thickness") between the
第一粒子230可包含經由使自基質所接收的光散射來提供防眩效果的粒子。第一粒子可包含球形或非晶形粒子，較佳地包含球形粒子。使用此類粒子，第一粒子可藉由允許間隙填充層的表面上的光均一散射來改善光學膜的外部形態。
The
第一粒子可具有20微米或小於20微米的平均粒子直徑D50，較佳地為2微米至15微米，更佳地為2微米至10微米。在平均粒子直徑的此範圍內，第一粒子可包含於間隙填充層中且可確保防眩效果。 The first particles may have an average particle diameter D50 of 20 microns or less, preferably 2 microns to 15 microns, and more preferably 2 microns to 10 microns. Within this range of the average particle diameter, the first particles may be included in the gap-fill layer and the anti-glare effect can be ensured.
第一粒子的平均粒子直徑可小於對應於壓花光學圖案的頂部部分的第一表面的寬度，或壓花光學圖案或扁平區段的最大寬度。在此情形下，第一粒子可確保防眩效果而不造成莫氏現象。 The average particle diameter of the first particles may be smaller than the width of the first surface corresponding to the top portion of the embossed optical pattern, or the maximum width of the embossed optical pattern or flattened section. In this case, the first particles can ensure the anti-glare effect without causing the Mohs phenomenon.
第一粒子230為具有經設定的折射率以使得第一粒子230與基質之間的折射率的差的絕對值在0至0.03的範圍內的粒子，藉此保持對光學膜的下部側處的可視性的改善。另外，第一粒子可關於自圖案化層所接收的光來提供防眩效果。在一個實施例中，第一粒子可具有與基質相同的折射率或不同的折射率。舉例而言，第一粒子與基質之間的折射率的差的絕對值可為0、0.005、0.01、0.015、0.02、0.025或0.03。
The
第一粒子為典型防眩粒子且可包含有機粒子、無機粒子以及有機-無機混合粒子中的至少一者。有機粒子可由聚甲基丙烯 酸甲酯、聚苯乙烯或聚甲基丙烯酸甲酯與苯乙烯的共聚物形成，但不限於此。無機粒子可包含矽石、二氧化鈦、氧化鋯以及氧化鋁，但不限於此。較佳地，第一粒子為有機粒子，更佳地為聚甲基丙烯酸甲酯粒子，以改善與基質的相容性。 The first particles are typical anti-glare particles and may include at least one of organic particles, inorganic particles, and organic-inorganic mixed particles. Organic particles Methyl acid ester, polystyrene, or a copolymer of polymethyl methacrylate and styrene is formed, but not limited thereto. The inorganic particles may include silica, titania, zirconia, and alumina, but are not limited thereto. Preferably, the first particles are organic particles, more preferably polymethyl methacrylate particles, to improve compatibility with the matrix.
第一粒子可具有大於0至1.53的折射率，具體而言為1.43至1.53，更具體而言為1.43至1.525。 The first particles may have a refractive index greater than 0 to 1.53, specifically 1.43 to 1.53, and more specifically 1.43 to 1.525.
基質可支撐間隙填充層以使得第一粒子暴露於間隙填充層的表面上。基質可由用於間隙填充層的組成物形成，此可確保第一粒子與基質之間的折射率的差的絕對值在0至0.03的範圍內。基質可具有大於0至1.53的折射率，具體而言為1.43至1.53，更具體而言為1.43至1.525。 The matrix may support the gap-fill layer so that the first particles are exposed on the surface of the gap-fill layer. The matrix may be formed of a composition for the gap-fill layer, which may ensure that the absolute value of the difference in refractive index between the first particles and the matrix is in the range of 0 to 0.03. The matrix may have a refractive index greater than 0 to 1.53, specifically 1.43 to 1.53, more specifically 1.43 to 1.525.
用於間隙填充層的組成物可包含可光固化化合物、甲基丙烯酸單體、起始劑以及第一粒子。 The composition for the gap-fill layer may include a photocurable compound, a methacrylic monomer, an initiator, and first particles.
可光固化化合物可包含可UV固化基，例如甲基丙烯酸酯基或含環氧基化合物(寡聚物及樹脂中的至少一者)。可光固化化合物可包含雙官能或更高官能甲基丙烯酸酯寡聚物及其形成的樹脂中的至少一者。可光固化化合物可包含多元醇及甲基丙烯酸酯的多官能甲基丙烯酸酯以及由多元醇的羥基酯、異氰酸酯化合物以及甲基丙烯酸製備的多官能胺基甲酸酯甲基丙烯酸酯中的至少一者。甲基丙烯酸單體可包含上文在對用於圖案化層的組成物的描述中所描述的甲基丙烯酸單體中的至少一者。起始劑可包含上文在對用於圖案化層的組成物的描述中所描述的起始劑中的至少一者。第一粒子與上文所描述的彼等相同。 The photocurable compound may include a UV-curable group such as a methacrylate group or an epoxy group-containing compound (at least one of an oligomer and a resin). The photocurable compound may include at least one of a bifunctional or higher-functional methacrylate oligomer and the resin formed thereof. The photocurable compound may include at least one of a polyfunctional methacrylate ester of a polyol and a methacrylate, and a polyfunctional urethane methacrylate prepared from a hydroxy ester of a polyol, an isocyanate compound, and methacrylic acid One. The methacrylic monomer may include at least one of the methacrylic monomers described above in the description of the composition for the patterned layer. The initiator may include at least one of the initiators described above in the description of the composition for patterning the layer. The first particles are the same as those described above.
用於間隙填充層的組成物可更包含典型添加劑，諸如分 散劑、消泡劑、調平劑、增滑劑、抗氧化劑、UV吸收劑、光穩定劑以及抗指紋劑。 The composition used for the gap filling layer may further contain typical additives such as Powder, defoamer, leveling agent, slip agent, antioxidant, UV absorber, light stabilizer and anti-fingerprint agent.
舉例而言，調平劑可為UV反應性矽酮添加劑(例如：UV3500)。舉例而言，分散劑可為具有高分子量的嵌段共聚物的非絮凝型分散劑(例如：Disperbyk-2163)。舉例而言，抗指紋劑可為可UV固化氟類丙烯酸化合物(例如：KY 1200 1203)。 For example, the leveling agent may be a UV-reactive silicone additive (for example: UV3500). For example, the dispersant may be a non-flocculating type dispersant having a high molecular weight block copolymer (for example: Disperbyk-2163). For example, the anti-fingerprint agent may be a UV-curable fluoroacrylic compound (for example: KY 1200 1203).
儘管用於間隙填充層的組成物可為無溶劑型組成物，但用於間隙填充層的組成物可更包含溶劑以促進間隙填充層的形成。溶劑可為典型溶劑，例如丙二醇單甲醚乙酸酯(propylene glycol monomethyl ether acetate；PGME)及甲基異丁基酮(methylisobutylketone；MIBK)中的至少一者，但不限於此。 Although the composition used for the gap-fill layer may be a solvent-free composition, the composition used for the gap-fill layer may further contain a solvent to promote the formation of the gap-fill layer. The solvent may be a typical solvent, such as at least one of propylene glycol monomethyl ether acetate (PGME) and methyl isobutyl ketone (MIBK), but is not limited thereto.
用於間隙填充層的組成物可更包含具有比第一粒子230更高的折射率的第二粒子。因此，一旦使用於間隙填充層的組成物固化，則有可能確保第一粒子與基質之間的差的絕對值在大於0至0.03的範圍內。
The composition for the gap-fill layer may further include second particles having a higher refractive index than the
第二粒子可具有1.8或大於1.8的折射率，較佳地為2.0或大於2.0，或2.0至3.0。在此範圍內，組成物可易於確保間隙填充層的折射率。 The second particles may have a refractive index of 1.8 or greater, preferably 2.0 or greater, or 2.0 to 3.0. Within this range, the composition can easily ensure the refractive index of the gap-fill layer.
第二粒子可包含與上文在對圖案化層的描述中所描述的高折射率無機粒子實質上相同的粒子。較佳地，第二粒子包含氧化鋯。第二粒子可具有5奈米至80奈米的平均粒子直徑D50。可藉由所屬領域中具通常知識者熟知的典型方法來量測第二粒子的平均粒子直徑D50。在平均粒子直徑的此範圍內，第二粒子可提高高折射率無機粒子的折射率。 The second particles may include substantially the same particles as the high-refractive-index inorganic particles described above in the description of the patterned layer. Preferably, the second particles comprise zirconia. The second particle may have an average particle diameter D50 of 5 nm to 80 nm. The average particle diameter D50 of the second particles can be measured by a typical method well known to those skilled in the art. Within this range of the average particle diameter, the second particles can increase the refractive index of the high refractive index inorganic particles.
第二粒子可以10重量%至80重量%的量存在於用於間隙填充層的組成物中或間隙填充層中，較佳地為10重量%至75重量%，例如15重量%至70重量%。在此範圍內，第二粒子可保持間隙填充層的硬度，同時保持所述第二粒子的分散。 The second particles may be present in the composition for the gap-fill layer or in the gap-fill layer in an amount of 10% by weight to 80% by weight, preferably 10% by weight to 75% by weight, for example 15% by weight to 70% by weight . Within this range, the second particles can maintain the hardness of the gap-fill layer while maintaining the dispersion of the second particles.
間隙填充層220可具有30微米或小於30微米的最大厚度，例如20微米或小於20微米。在此範圍內，間隙填充層可防止諸如捲曲的翹曲產生。
The gap-
在改善對比率的層200中，第一粒子230可以1重量%至50重量%的量存在，較佳地為2重量%至40重量%。在此範圍內，第一粒子可確保防眩效果，同時保持對對比率的改善。
In the
改善對比率的光學膜10可具有0%至35%的混濁度。在此範圍內，改善對比率的光學膜可用於光學顯示裝置。
The
隨後，將參考圖2描述根據本發明的一個實施例的偏光板。圖2為根據本發明的一個實施例的偏光板的截面視圖。 Subsequently, a polarizing plate according to an embodiment of the present invention will be described with reference to FIG. 2. 2 is a cross-sectional view of a polarizing plate according to an embodiment of the present invention.
參考圖2，根據此實施例的偏光板20包含偏光膜300及改善對比率的膜，所述改善對比率的膜可包含根據本發明的實施例的改善對比率的光學膜。
Referring to FIG. 2, the
改善對比率的光學膜可形成於偏光膜300的光出射表面上。改善對比率的光學膜使已穿過偏光膜300的經偏光的光漫射，藉此改善正面對比率、側面對比率、觀視角度以及黑色可視性。
An optical film with improved contrast ratio may be formed on the light exit surface of the
偏光膜300可使自液晶面板接收的光朝向改善對比率的層200偏光及透射。偏光膜300形成於改善對比率的層200的光入射表面上。
The
偏光膜300可包含偏光片。具體而言，偏光片可包含藉
由將聚乙烯醇膜單軸拉伸來獲得的聚乙烯醇偏光片，或藉由使聚乙烯醇膜脫水來獲得的多烯基偏光片。偏光片可具有約5微米至約40微米的厚度。在此範圍內，偏光膜300可用於光學顯示裝置。
The
偏光膜300可包含偏光片及形成於偏光片的至少一個表面上(即，形成於偏光片的光入射表面上)的保護層。保護層保護偏光片，藉此改善偏光板的可靠度及機械強度。保護層可包含光學透明保護膜及光學透明保護塗層中的至少一者。保護層與上文所描述的相同。
The
可藉由典型方法來製造偏光板。具體而言，藉由通過上文所描述的方法形成改善對比率的光學膜，接著經由第一樹脂層將偏光膜黏合至改善對比率的光學膜來製造偏光板。第一樹脂層關於偏光膜展現良好黏著強度。 The polarizing plate can be manufactured by a typical method. Specifically, a polarizing plate is manufactured by forming an optical film with improved contrast ratio by the method described above, and then bonding the polarizing film to the optical film with improved contrast ratio through the first resin layer. The first resin layer exhibits good adhesive strength with respect to the polarizing film.
根據本發明，液晶顯示裝置可包含根據本發明的偏光板。在一個實施例中，液晶顯示裝置可包含關於液晶面板的觀視器側處的偏光板。在本文中，術語「觀視器側處的偏光板」指代置放於液晶面板的螢幕的側面上的偏光板，即，置放於與光源相對的液晶面板的側面上的偏光板。 According to the present invention, the liquid crystal display device may include the polarizing plate according to the present invention. In one embodiment, the liquid crystal display device may include a polarizing plate at the viewer side with respect to the liquid crystal panel. In this document, the term "polarizer at the viewer side" refers to a polarizer placed on the side of the screen of the liquid crystal panel, that is, a polarizer placed on the side of the liquid crystal panel opposite to the light source.
在一個實施例中，液晶顯示裝置可包含背光單元、第一偏光板、液晶面板以及第二偏光板，以上各者按陳述次序堆疊，其中第二偏光板可包含根據本發明的偏光板。液晶面板可採用垂直對準(vertical alignment；VA)模式、IPS模式、圖案化垂直對準(patterned vertical alignment；PVA)模式或超圖案化垂直對準(super-patterned vertical alignment；S-PVA)模式，但不限於此。在另一實施例中，液晶顯示裝置可包含光源側處的偏光板。在本文 中，術語「光源側處的偏光板」指代安置於關於液晶面板的光源側處的偏光板。在又一實施例中，關於液晶面板的觀視器側處的偏光板及光源側處的偏光板兩者可包含根據本發明的偏光板。 In one embodiment, the liquid crystal display device may include a backlight unit, a first polarizing plate, a liquid crystal panel, and a second polarizing plate, each of which is stacked in the stated order, wherein the second polarizing plate may include the polarizing plate according to the present invention. The liquid crystal panel may adopt a vertical alignment (VA) mode, an IPS mode, a patterned vertical alignment (PVA) mode or a super-patterned vertical alignment (S-PVA) mode , But not limited to this. In another embodiment, the liquid crystal display device may include a polarizing plate at the light source side. In this article Among them, the term "polarizing plate at the light source side" refers to the polarizing plate disposed at the light source side with respect to the liquid crystal panel. In yet another embodiment, both the polarizing plate at the viewer side of the liquid crystal panel and the polarizing plate at the light source side may include the polarizing plate according to the present invention.
本發明提供一種改善對比率的光學膜，所述光學膜可藉由粒子實現散射外部光的效果，同時藉由圖案化層及間隙填充層保持對正面可視性及側面可視性的改善。 The present invention provides an optical film with improved contrast ratio. The optical film can realize the effect of scattering external light by particles, and at the same time maintain the improvement of the front visibility and the side visibility by the patterned layer and the gap filling layer.
本發明提供一種改善對比率的光學膜，所述光學膜包含圖案化層及防眩粒子而不遭遇莫氏現象。 The present invention provides an optical film with improved contrast ratio. The optical film includes a patterned layer and anti-glare particles without encountering the Mohs phenomenon.
本發明提供一種具有細長結構的改善對比率的光學膜。 The present invention provides an improved contrast ratio optical film having an elongated structure.
隨後，將參考一些實例更詳細地描述本發明。然而，應注意，此等實例僅為說明而提供，且不應以任何方式解釋為限制本發明。 Subsequently, the present invention will be described in more detail with reference to some examples. However, it should be noted that these examples are provided for illustration only and should not be construed in any way to limit the invention.
製備例1：製備用於圖案化層的組成物Preparation Example 1: Preparation of a composition for a patterned layer
藉由將73重量份的無溶劑含氧化鋯溶液HR-10-1(日本觸媒株式會社(Nippon Shokubai Co.,Ltd.)，氧化鋯的平均粒子直徑(D50)：11奈米，含有分散於丙烯酸苯甲酯中的80重量%的氧化鋯的高折射率化合物，折射率：1.67)與22重量份的三甲基丙烷三丙烯酸酯混合，接著將4.5重量份起始劑(TPO LG，印度全球化資本有限公司(IGC Co.,Ltd.))及0.5重量份的脫模劑(BYK 3500)添加至混合物來製備用於圖案化層的組成物。用於圖案化層的組成物具有1.60的折射率。在用於圖案化層的組成物中，氧化鋯以按固體含量計51重量%的量存在。 By combining 73 parts by weight of a solvent-free zirconia-containing solution HR-10-1 (Nippon Shokubai Co., Ltd.), the average particle diameter of zirconia (D50): 11 nm, containing dispersion 80% by weight of high refractive index compound of zirconia in benzyl acrylate, refractive index: 1.67) was mixed with 22 parts by weight of trimethylpropane triacrylate, and then 4.5 parts by weight of initiator (TPO LG, India Global Capital Co., Ltd. (IGC Co., Ltd.) and 0.5 parts by weight of mold release agent (BYK 3500) were added to the mixture to prepare a composition for the patterned layer. The composition for the patterned layer has a refractive index of 1.60. In the composition for the patterned layer, zirconia is present in an amount of 51% by weight based on the solid content.
製備例2：製備用於間隙填充層的組成物Preparation Example 2: Preparation of a composition for a gap-filling layer
將23重量份的可光固化化合物(UP111，ENTIS有限公 司(ENTIS Co.,Ltd)，固體含量：70重量%，溶劑：PGME(丙二醇甲醚))、8.4重量份的SR833S(沙多瑪有限公司(Sartomer Co.,Ltd.))、8重量份的HDDA(ENTIS有限公司)、46重量份的丙二醇單甲基醚乙酸酯(propylene glycol monomethylether acetate；PGMEA)以及12重量份的甲基異丁基酮(MIBK)混合且攪拌。在攪拌完成後，將1.15重量份的起始劑(Omnirad 184，印度全球化資本有限公司)、0.03重量份的UV反應性矽酮添加劑(UV3500)、0.07重量份的分散劑(Disperbyk-2163，畢克化學有限公司(BYK Co.,Ltd.))以及0.05重量份的抗指紋劑(KY1203，信越株式會社(Shin-Etsu Co.,Ltd.))添加至混合物，藉此製備溶液。 23 parts by weight of photocurable compound (UP111, ENTIS Division (ENTIS Co., Ltd), solid content: 70% by weight, solvent: PGME (propylene glycol methyl ether), 8.4 parts by weight of SR833S (Sartomer Co., Ltd.), 8 parts by weight HDDA (ENTIS Co., Ltd.), 46 parts by weight of propylene glycol monomethylether acetate (PGMEA) and 12 parts by weight of methyl isobutyl ketone (MIBK) are mixed and stirred. After the stirring is completed, 1.15 parts by weight of starter (Omnirad 184, India Global Capital Limited), 0.03 parts by weight of UV-reactive silicone additive (UV3500), and 0.07 parts by weight of dispersant (Disperbyk-2163, BYK Co., Ltd.) and 0.05 parts by weight of anti-fingerprint agent (KY1203, Shin-Etsu Co., Ltd.) were added to the mixture, thereby preparing a solution.
將有機粒子(MSX-105，折射率：1.495，聚甲基丙烯酸甲酯粒子，平均粒子直徑(D50)：5.41微米，單分散粒子，積水株式會社(Sekisui Co.,Ltd.))與溶液混合，藉此製備用於間隙填充層的溶液。用於間隙填充層的組成物含有按固體含量計6重量%的有機粒子。 Organic particles (MSX-105, refractive index: 1.495, polymethyl methacrylate particles, average particle diameter (D50): 5.41 microns, monodisperse particles, Sekisui Co., Ltd.) were mixed with the solution , Thereby preparing a solution for the gap filling layer. The composition used for the gap filling layer contains 6% by weight of organic particles based on the solid content.
製備例3：製備用於間隙填充層的組成物Preparation Example 3: Preparation of a composition for a gap-filling layer
藉由與製備例2中相同的方法製備溶液。 The solution was prepared by the same method as in Preparation Example 2.
將有機粒子(MSX-2H，折射率：1.495，聚甲基丙烯酸甲酯粒子，平均粒子直徑(D50)：2.7微米，中間分散粒子，積水株式會社)與溶液混合，藉此製備用於間隙填充層的溶液。用於間隙填充層的組成物含有按固體含量計6重量%的有機粒子。 Organic particles (MSX-2H, refractive index: 1.495, polymethyl methacrylate particles, average particle diameter (D50): 2.7 microns, intermediate dispersed particles, Sekisui Corporation) were mixed with the solution, thereby preparing for gap filling Layer of solution. The composition used for the gap filling layer contains 6% by weight of organic particles based on the solid content.
製備例4：製備用於間隙填充層的組成物Preparation Example 4: Preparation of a composition for a gap-filling layer
將24重量份的可光固化化合物(UP111，ENTIS有限公 司，固體含量：70重量%，溶劑：PGME(丙二醇甲醚))、17重量份的含氧化鋯無溶劑溶液HR-10-1(日本觸媒株式會社，氧化鋯的平均粒子直徑(D50)：11奈米)、46重量份的PGMEA以及12重量份的MIBK混合且攪拌。在攪拌完成後，將1.15重量份的起始劑(Omnirad 184，印度全球化資本有限公司)、0.03重量份的UV反應性矽酮添加劑(UV3500)、0.07重量份的分散劑(Disperbyk-2163，畢克化學有限公司)以及0.05重量份的抗指紋劑(KY1203，信越株式會社)添加至混合物，藉此製備溶液。 24 parts by weight of photocurable compound (UP111, ENTI Division, solid content: 70% by weight, solvent: PGME (propylene glycol methyl ether)), 17 parts by weight of solvent-free solution containing zirconia HR-10-1 (Japan Catalyst Co., Ltd., average particle diameter of zirconia (D50) : 11 nm), 46 parts by weight of PGMEA and 12 parts by weight of MIBK are mixed and stirred. After the stirring is completed, 1.15 parts by weight of starter (Omnirad 184, India Global Capital Limited), 0.03 parts by weight of UV-reactive silicone additive (UV3500), and 0.07 parts by weight of dispersant (Disperbyk-2163, BYK Chemical Co., Ltd.) and 0.05 parts by weight of an anti-fingerprint agent (KY1203, Shin-Etsu Co., Ltd.) were added to the mixture, thereby preparing a solution.
將有機粒子(MSX-105，折射率：1.495，聚甲基丙烯酸甲酯粒子，平均粒子直徑(D50)：5.41微米，單分散粒子，積水株式會社)與溶液混合，藉此製備用於間隙填充層的溶液。用於間隙填充層的組成物含有按固體含量計6重量%的有機粒子。 Organic particles (MSX-105, refractive index: 1.495, polymethyl methacrylate particles, average particle diameter (D50): 5.41 microns, monodisperse particles, Sekisui Corporation) were mixed with the solution, thereby preparing for gap filling Layer of solution. The composition used for the gap filling layer contains 6% by weight of organic particles based on the solid content.
製備例5：製備用於間隙填充層的組成物Preparation Example 5: Preparation of a composition for a gap-filling layer
藉由與製備例2中相同的方法製備溶液。 The solution was prepared by the same method as in Preparation Example 2.
將有機粒子(SMX-5R，折射率：1.555，聚甲基丙烯酸甲酯共聚物粒子，平均粒子直徑(D50)：5.0微米，聚分散粒子，積水株式會社)與溶液混合，藉此製備用於間隙填充層的溶液。用於間隙填充層的組成物含有按固體含量計6重量%的有機粒子。 Organic particles (SMX-5R, refractive index: 1.555, polymethyl methacrylate copolymer particles, average particle diameter (D50): 5.0 microns, polydisperse particles, Sekisui Corporation) are mixed with the solution, thereby preparing for Gap filling layer solution. The composition used for the gap filling layer contains 6% by weight of organic particles based on the solid content.
製備例6：製備用於間隙填充層的組成物Preparation Example 6: Preparation of a composition for a gap-filling layer
藉由與製備例2中相同的方法製備溶液。 The solution was prepared by the same method as in Preparation Example 2.
將有機粒子(SBX-4，折射率：1.595，聚苯乙烯粒子，平均粒子直徑(D50)：4.0微米，聚分散粒子，積水株式會社)與溶液混合，藉此製備用於間隙填充層的溶液。用於間隙填充層的組成物含有按固體含量計6重量%的有機粒子。 Organic particles (SBX-4, refractive index: 1.595, polystyrene particles, average particle diameter (D50): 4.0 microns, polydisperse particles, Sekisui Corporation) were mixed with the solution, thereby preparing a solution for the gap-filling layer . The composition used for the gap filling layer contains 6% by weight of organic particles based on the solid content.
製備例7：製備用於間隙填充層的組成物Preparation Example 7: Preparation of a composition for a gap-filling layer
藉由與製備例2中相同的方法製備溶液。未將粒子添加至用於間隙填充層的組成物。 The solution was prepared by the same method as in Preparation Example 2. No particles were added to the composition for the gap-fill layer.
製備例8：製備用於間隙填充層的組成物Preparation Example 8: Preparation of a composition for a gap-filling layer
將38.5重量份的可光固化化合物(UP111，ENTIS有限公司，固體含量：70重量%，溶劑：PGME(丙二醇甲醚))、6.5重量份的含氧化鋯無溶劑溶液HR-10-1(日本觸媒株式會社，氧化鋯的平均粒子直徑(D50)：11奈米，含有分散於丙烯酸苯甲酯中的80重量%的氧化鋯的高折射率化合物，折射率：1.67)、42重量份的PGMEA以及12重量份的MIBK混合且攪拌。在攪拌完成後，將1.15重量份的起始劑(Omnirad 184，印度全球化資本有限公司)、0.03重量份的UV反應性矽酮添加劑(UV3500)、0.07重量份的分散劑(Disperbyk-2163，畢克化學有限公司)以及0.05重量份的抗指紋劑(KY1203，信越株式會社)添加至混合物，藉此製備溶液。 38.5 parts by weight of photocurable compound (UP111, ENTIS Co., Ltd., solid content: 70% by weight, solvent: PGME (propylene glycol methyl ether)), 6.5 parts by weight of solvent-free solution containing zirconia HR-10-1 (Japan Catalyst Co., Ltd., average particle diameter (D50) of zirconia: 11 nm, high refractive index compound containing 80% by weight of zirconia dispersed in benzyl acrylate, refractive index: 1.67), 42 parts by weight PGMEA and 12 parts by weight of MIBK were mixed and stirred. After the stirring is completed, 1.15 parts by weight of starter (Omnirad 184, India Global Capital Limited), 0.03 parts by weight of UV-reactive silicone additive (UV3500), and 0.07 parts by weight of dispersant (Disperbyk-2163, BYK Chemical Co., Ltd.) and 0.05 parts by weight of an anti-fingerprint agent (KY1203, Shin-Etsu Co., Ltd.) were added to the mixture, thereby preparing a solution.
將有機粒子(MSX-105，折射率：1.495，聚甲基丙烯酸甲酯粒子，平均粒子直徑(D50)：5.41微米，單分散粒子，積水株式會社)與溶液混合，藉此製備用於間隙填充層的溶液。用於間隙填充層的組成物含有按固體含量計6重量%的有機粒子及16重量%的氧化鋯。 Organic particles (MSX-105, refractive index: 1.495, polymethyl methacrylate particles, average particle diameter (D50): 5.41 microns, monodisperse particles, Sekisui Corporation) were mixed with the solution, thereby preparing for gap filling Layer of solution. The composition for the gap filling layer contains 6% by weight of organic particles and 16% by weight of zirconia in terms of solid content.
製備例9：製備用於圖案化層的組成物Preparation Example 9: Preparation of composition for patterned layer
藉由將40重量份的含氧化鋯無溶劑溶液HR-10-1(日本觸媒株式會社，氧化鋯的平均粒子直徑(D50)：11奈米，含有分散於丙烯酸苯甲酯中的80重量%的氧化鋯的高折射率化合物，折 射率：1.67)與60重量份的三甲基丙烷三丙烯酸酯混合，接著將4.5重量份的起始劑(TPO LG，印度全球化資本有限公司)及0.5重量份的脫模劑(BYK 3500)添加至混合物來製備用於圖案化層的組成物。用於圖案化層的組成物具有1.55的折射率。在用於圖案化層的組成物中，氧化鋯以按固體含量計28重量%的量存在。 By mixing 40 parts by weight of a solvent-free solution containing zirconia HR-10-1 (Japan Catalyst Co., Ltd., average particle diameter (D50) of zirconia: 11 nm, containing 80 parts by weight dispersed in benzyl acrylate) % High refractive index compound of zirconia, fold Shot rate: 1.67) mixed with 60 parts by weight of trimethylpropane triacrylate, followed by 4.5 parts by weight of an initiator (TPO LG, India Global Capital Limited) and 0.5 parts by weight of a release agent (BYK 3500 ) Is added to the mixture to prepare a composition for the patterned layer. The composition for the patterned layer has a refractive index of 1.55. In the composition for the patterned layer, zirconia is present in an amount of 28% by weight based on solid content.
實例1Example 1
藉由將在製備例1中製備的用於圖案化層的組成物塗佈至聚對苯二甲酸乙二酯膜(SKC有限公司(SKC Co.,Ltd.)，厚度：40微米)的一個表面上來形成用作保護層的塗層。藉由使用具有雕刻稜鏡圖案及形成於其上的扁平區段的光學膜來向塗層施加壓花光學圖案及扁平區段，以在所述塗層上形成圖案化層。 By applying the composition for the patterned layer prepared in Preparation Example 1 to a polyethylene terephthalate film (SKC Co., Ltd., thickness: 40 μm) A coating used as a protective layer is formed on the surface. The patterned layer is formed on the coating layer by applying an embossed optical pattern and flat section to the coating layer by using an optical film having an engraved hull pattern and the flat section formed thereon.
藉由將在製備例2中製備的用於間隙填充層的組成物沈積至具有#18的圖案化層上，接著在80℃下乾燥2分鐘且光固化，以形成改善對比率的光學膜。表1中繪示形成於改善對比率的光學膜上的光學圖案及扁平區段的細節。 By depositing the composition for the gap-fill layer prepared in Preparation Example 2 onto the patterned layer having #18, followed by drying at 80° C. for 2 minutes and photo-curing, an optical film with improved contrast ratio was formed. Table 1 shows details of optical patterns and flat sections formed on the optical film with improved contrast ratio.
藉由在60℃下將聚乙烯醇膜拉伸至其初始長度的3倍且將碘吸附至經拉伸的膜，接著在40℃下在碘溶液中將膜拉伸至膜的經拉伸長度的2.5倍，以製造偏光片。將偏光片黏合至改善對比率的光學膜的保護膜的另一表面，藉此製備偏光板。 By stretching the polyvinyl alcohol film to 3 times its original length at 60°C and adsorbing iodine to the stretched film, then stretching the film to the stretched film at 40°C in an iodine solution 2.5 times the length to make polarizers. The polarizer is bonded to the other surface of the protective film of the optical film with improved contrast ratio, thereby preparing a polarizing plate.
實例2Example 2
除了使用在製備例3中製備的用於間隙填充層的組成物而非在製備例2中製備的用於間隙填充層的組成物之外，以與實例1中相同的方式製造改善對比率的光學膜及偏光板。 Except for using the composition for the gap-filling layer prepared in Preparation Example 3 instead of the composition for the gap-filling layer prepared in Preparation Example 2, a method for improving the contrast ratio was manufactured in the same manner as in Example 1. Optical film and polarizing plate.
實例3Example 3
除了使用在製備例8中製備的用於間隙填充層的組成物而非在製備例2中製備的用於間隙填充層的組成物之外，以與實例1中相同的方式製造改善對比率的光學膜及偏光板。 Except that the composition for the gap-fill layer prepared in Preparation Example 8 was used instead of the composition for the gap-fill layer prepared in Preparation Example 2, the contrast ratio-improving method was manufactured in the same manner as in Example 1. Optical film and polarizing plate.
比較例1至比較例4Comparative Example 1 to Comparative Example 4
除了使用如表2中列出的用於間隙填充層的組成物而非在製備例2中製備的用於間隙填充層的組成物之外，以與實例1中相同的方式製造改善對比率的光學膜及偏光板。 Except for using the composition for the gap-filling layer as listed in Table 2 instead of the composition for the gap-filling layer prepared in Preparation Example 2, a method for improving the contrast ratio was manufactured in the same manner as in Example 1. Optical film and polarizing plate.
比較例5Comparative example 5
除了使用在製備例9中製備的用於間隙填充層的組成物而非在製備例1中製備的用於間隙填充層的組成物之外，以與實例3中相同的方式製造改善對比率的光學膜及偏光板。 Except for using the composition for the gap-filling layer prepared in Preparation Example 9 instead of the composition for the gap-filling layer prepared in Preparation Example 1, the contrast ratio-improving method was manufactured in the same manner as in Example 3. Optical film and polarizing plate.
參考例1Reference Example 1
以與實例1中相同的方法製造偏光板。藉由將用作保護層的聚對苯二甲酸乙二酯膜(SKC有限公司，厚度：40微米)黏合至偏光片的一個表面來製造偏光板。 The polarizing plate was manufactured in the same method as in Example 1. The polarizing plate was manufactured by bonding a polyethylene terephthalate film (SKC Co., Ltd., thickness: 40 μm) used as a protective layer to one surface of the polarizer.
對在實例及比較例中製備的改善對比率的光學膜及偏光板進行以下特性的評估，且評估結果繪示於表2中。 The optical films and polarizing plates with improved contrast ratios prepared in Examples and Comparative Examples were evaluated for the following characteristics, and the evaluation results are shown in Table 2.
改善對比率的光學膜的混濁度及總透射率(單位：%)使用NDH 2000(日本電色株式會社(Nippon Denshok Co.,Ltd.))來 量測混濁度及透射率。使用NDH2000在400奈米至700奈米的波長範圍中量測DF(漫射透射光)、PT(平行透射光)、TT(總透射光)以及混濁度。 To improve the haze and total transmittance (unit: %) of the optical film of contrast ratio, use NDH 2000 (Nippon Denshok Co., Ltd.) Measure turbidity and transmittance. NDH2000 was used to measure DF (diffuse transmitted light), PT (parallel transmitted light), TT (total transmitted light), and turbidity in the wavelength range of 400 nm to 700 nm.
DF：自燈發射且穿過樣品同時在樣品中漫射的光的總和 DF: The sum of light emitted from the lamp and passing through the sample while diffusing in the sample
PT：自燈發射且線性地穿過樣品的光的總和 PT: sum of light emitted from the lamp and linearly passing through the sample
TT：漫射透射光及平行透射光的總和 TT: sum of diffuse transmitted light and parallel transmitted light
混濁度：經由樣品展現的混濁度值 Turbidity: the turbidity value displayed by the sample
混濁度(%)=DF(漫射透射光)/TT(總透射光)x100 Turbidity (%) = DF (diffuse transmitted light)/TT (total transmitted light) x100
側面對比率(單位：%)及觀視角度(單位：°)根據側面對比率及1/2觀視角度(上部及下部，右方及左方)來評估在實例及比較例中製備的偏光板，且評估結果繪示於表2中。使用藉由以下方法製造的液晶顯示裝置來評估側面對比率及1/2觀視角度。 Side contrast ratio (unit: %) and viewing angle (unit: °) The polarized light prepared in Examples and Comparative Examples was evaluated based on the side contrast ratio and 1/2 viewing angle (upper and lower, right and left) The evaluation results are shown in Table 2. The liquid crystal display device manufactured by the following method was used to evaluate the side contrast ratio and 1/2 viewing angle.
製造第一偏光板Manufacturing the first polarizer
藉由在60℃下將聚乙烯醇膜拉伸至其初始長度的3倍且將碘吸附至經拉伸的膜，接著在40℃下在水溶液中將膜拉伸至膜的經拉伸長度的2.5倍，以製造第一偏光片。作為基層，使用用於偏光板的黏合劑(Z-200，日本Goshei株式會社(Nippon Goshei Co.,Ltd.))將三乙醯纖維素膜(厚度：80微米)黏合至第一偏光片的兩個表面，藉此製造偏光板。所製造的偏光板用作第一偏光板。 By stretching the polyvinyl alcohol film to 3 times its original length at 60°C and adsorbing iodine to the stretched film, then stretching the film to the stretched length of the film at 40°C in an aqueous solution 2.5 times to manufacture the first polarizer. As the base layer, the adhesive for the polarizing plate (Z-200, Nippon Goshei Co., Ltd.) was used to bond the triethyl acetyl cellulose film (thickness: 80 μm) to the first polarizer. Two surfaces, thereby manufacturing a polarizing plate. The manufactured polarizing plate is used as the first polarizing plate.
製造用於液晶顯示器的模組Manufacture of modules for liquid crystal displays
將第一偏光板、液晶面板(PVA模式)以及在實例及比較例中製造的偏光板中的每一者按陳述次序組裝，藉此提供用於液晶顯示裝置的模組。此處，將在實例及比較例中製備的偏光板中的 每一者組裝為觀視器側處的偏光板，以使得將間隙填充層置放於模組的最外部側處。 Each of the first polarizing plate, the liquid crystal panel (PVA mode), and the polarizing plates manufactured in Examples and Comparative Examples were assembled in the stated order, thereby providing a module for a liquid crystal display device. Here, the polarizers prepared in Examples and Comparative Examples Each is assembled as a polarizer at the viewer side so that the gap-fill layer is placed at the outermost side of the module.
組裝LED光源、光導板以及用於液晶顯示裝置的模組，藉此提供包含單側邊緣型LED光源的液晶顯示裝置(所述液晶顯示裝置與三星LED TV(型號：UN32H5500)具有相同組態，但其中改用實例及比較例的用於液晶顯示裝置的模組中的每一者)。 Assemble the LED light source, the light guide plate and the module for the liquid crystal display device, thereby providing a liquid crystal display device including a single-sided edge type LED light source (the liquid crystal display device has the same configuration as the Samsung LED TV (model: UN32H5500), However, each of the modules for liquid crystal display devices of Examples and Comparative Examples is used instead.
使用EZCONTRAST X88RC(EZXL-176R-F422A4，艾爾迪姆有限公司(ELDIM Co.,Ltd.))量測球形座標系統中的座標(0°，60°)處的白色模式及黑色模式中的每一者中的亮度。將側面對比率計算為球形座標系統中的座標(0°，60°)處的白色模式中的亮度與黑色模式中的亮度的比率。將1/2觀視角度設定成一角度，液晶顯示裝置在所述角度處具有對應於白色模式中的1/2正面亮度的亮度。 Use EZCONTRAST X88RC (EZXL-176R-F422A4, ELDIM Co., Ltd.) to measure each of the white mode and black mode at the coordinates (0°, 60°) in the spherical coordinate system One of the brightness. The side contrast ratio is calculated as the ratio of the brightness in the white mode to the brightness in the black mode at the coordinates (0°, 60°) in the spherical coordinate system. The 1/2 viewing angle is set to an angle at which the liquid crystal display device has a brightness corresponding to 1/2 of the front brightness in the white mode.
外部光散射：基於根據JIS Z8741及ISO 2813使用BYK加登納(BYK Gardner)來量測的60°反射光澤(gloss)來評估外部光散射。將小於90的60°反射光澤評估為存在外部光散射效果，且將90或大於90的60°反射光澤評估為不存在外部光散射效果。 External light scattering: External light scattering was evaluated based on a 60° reflection gloss measured using BYK Gardner in accordance with JIS Z8741 and ISO 2813. The 60° reflection gloss of less than 90 was evaluated as the presence of external light scattering effect, and the 60° reflection gloss of 90 or more was evaluated as the absence of external light scattering effect.
*折射率差1：間隙填充層中的基質與第一粒子之間的折射率的差的絕對值 *Refractive index difference 1: The absolute value of the difference in refractive index between the matrix in the gap-fill layer and the first particle
*折射率差2：圖案化層的折射率-間隙填充層的折射率 *Refractive index difference 2: refractive index of patterned layer-refractive index of gap-fill layer
如表2中所繪示，根據本發明的偏光板實現正面及側面可視性的較高改善，展現高側面對比率，且可確保外部光散射效果。 As shown in Table 2, the polarizing plate according to the present invention achieves a higher improvement in front and side visibility, exhibits a high side contrast ratio, and can ensure an external light scattering effect.
相反，比較例1的偏光板以及比較例2及比較例3的偏光板雖然存在散射外部光的效果，但展現正面及側面對比率的不顯著改善以及不良側面對比率，在比較例1的偏光板中，基質與第一粒子之間的折射率的差的絕對值不在本發明的範圍內且圖案化層與間隙填充層之間的折射率的差小於0.06，在比較例2及比較例3的偏光板中，基質與第一粒子之間的折射率的差的絕對值不在本發明的範圍內。 In contrast, the polarizing plates of Comparative Example 1 and the polarizing plates of Comparative Examples 2 and 3 have the effect of scattering external light, but show insignificant improvement in the front and side contrast ratio and poor side contrast ratio. In the plate, the absolute value of the difference in refractive index between the matrix and the first particles is not within the scope of the present invention and the difference in refractive index between the patterned layer and the gap-fill layer is less than 0.06. In the polarizing plate, the absolute value of the difference in refractive index between the matrix and the first particles is not within the scope of the present invention.
在無粒子的情況下製造的比較例4的偏光板並不具有外 部光散射效果，且因此需要額外的膜來賦予散射外部光的效果，因此未能提供本發明的效果。 The polarizing plate of Comparative Example 4 manufactured without particles has no external Part of the light scattering effect, and therefore an additional film is required to impart the effect of scattering external light, and thus fails to provide the effect of the present invention.
比較例4的偏光板具有不良側面對比率以及不良1/2左方-右方觀視角度，在所述偏光板中，雖然基質與第一粒子之間的折射率的差的絕對值在本發明的範圍內，但圖案化層與間隙填充層之間的折射率的差不在本發明的範圍內。 The polarizing plate of Comparative Example 4 has a poor side contrast ratio and a poor 1/2 left-right viewing angle. In the polarizing plate, although the absolute value of the difference in refractive index between the matrix and the first particles is It is within the scope of the invention, but the difference in refractive index between the patterned layer and the gap-fill layer is outside the scope of the invention.
應理解，所屬領域中具通常知識者在不脫離本發明的精神及範疇的情況下可作出各種修改、變化、更改以及等效實施例。 It should be understood that those with ordinary knowledge in the art can make various modifications, changes, alterations, and equivalent embodiments without departing from the spirit and scope of the present invention.
10‧‧‧光學膜 10‧‧‧Optical film
100‧‧‧保護層 100‧‧‧Protective layer
200‧‧‧改善對比率的層 200‧‧‧Improved contrast ratio layer
210‧‧‧圖案化層 210‧‧‧patterned layer
211‧‧‧壓花光學圖案 211‧‧‧embossed optical pattern
212‧‧‧扁平區段 212‧‧‧Flat section
213‧‧‧傾斜表面 213‧‧‧inclined surface
214‧‧‧第一表面 214‧‧‧First surface
220‧‧‧間隙填充層 220‧‧‧Gap filling layer
230‧‧‧第一粒子 230‧‧‧First particle
A、L、W‧‧‧寬度 A, L, W‧‧‧Width
H1‧‧‧高度 H1‧‧‧ Height
P‧‧‧間距 P‧‧‧spacing
θ‧‧‧底角 θ‧‧‧Bottom angle
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| KR102498948B1 (en) * | 2019-08-22 | 2023-02-10 | 삼성에스디아이 주식회사 | Polarizing plate and optical display apparatus comprising the same |
| KR20210033105A (en) | 2019-09-17 | 2021-03-26 | 삼성디스플레이 주식회사 | Display apparatus and fabrication method thereof |
| CN111796349A (en) * | 2020-07-02 | 2020-10-20 | Tcl华星光电技术有限公司 | Visual angle diffusion film and display panel |
| CN114167633A (en) * | 2021-12-14 | 2022-03-11 | 深圳市华星光电半导体显示技术有限公司 | Visual angle diffusion film and display device |
| CN114583083A (en) * | 2022-02-24 | 2022-06-03 | Tcl华星光电技术有限公司 | Display module and display device |
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| TW201624074A (en) * | 2014-12-31 | 2016-07-01 | 三星Sdi 股份有限公司 | Liquid crystal display module and liquid crystal display comprising the same |
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| KR101659241B1 (en) * | 2015-11-06 | 2016-09-22 | 삼성에스디아이 주식회사 | Optical film for improving visibility, polarizing plate comprising the same, module for liquid crystal display apparatus comprising the same and liquid crystal display apparatus comprising the same |
| KR101640715B1 (en) * | 2015-09-08 | 2016-07-19 | 삼성에스디아이 주식회사 | Module for liquid crystal display apparatus and liquid crystal display apparatus comprising the same |
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- 2018-07-24 KR KR1020180086250A patent/KR102237004B1/en active IP Right Grant
- 2018-08-06 CN CN201880055849.5A patent/CN111033323B/en active Active
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| JP2011075942A (en) * | 2009-09-30 | 2011-04-14 | Fujifilm Corp | Anti-glare film, method of manufacturing the same, antireflection film, polarizing plate and image display device |
| TW201624074A (en) * | 2014-12-31 | 2016-07-01 | 三星Sdi 股份有限公司 | Liquid crystal display module and liquid crystal display comprising the same |
| TW201643483A (en) * | 2015-04-29 | 2016-12-16 | 三星Ｓｄｉ股份有限公司 | Optical film for improving contrast ratio, polarizing plate comprising the same, and liquid crystal display apparatus comprising the same |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201920989A (en) | 2019-06-01 |
| CN111033323B (en) | 2022-08-16 |
| CN111033323A (en) | 2020-04-17 |
| KR102237004B1 (en) | 2021-04-07 |
| KR20190024664A (en) | 2019-03-08 |
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