TWI679760B - OLED display device and manufacturing method thereof - Google Patents

Abstract

本發明之OLED顯示裝置之特徵在於具備：OLED面板1；λ/4相位差膜3，其貼附於OLED面板1上；以及偏光膜5，其貼附於λ/4相位差膜3上；且自偏光膜側於SCE(Specular Component Excluded，排除鏡面正反射光)模式下測定之反射率為1.2%以下。 The OLED display device of the present invention is characterized by comprising: an OLED panel 1; a λ / 4 retardation film 3 attached to the OLED panel 1; and a polarizing film 5 attached to the λ / 4 retardation film 3; In addition, the reflectance measured under the SCE (Specular Component Excluded) mode of the self-polarizing film side is less than 1.2%.

Description

OLED顯示裝置及其製造方法 OLED display device and manufacturing method thereof

本發明係關於一種能夠消除因散射所致之色相不均勻性而進行均勻之色相顯現之OLED顯示裝置及其製造方法。 The present invention relates to an OLED display device capable of eliminating uneven hue due to scattering and performing uniform hue development, and a manufacturing method thereof.

有機發光二極體(OLED：Organic Light-Emitting Diode)顯示裝置與CRT(cathode ray tube，陰極射線管)或LCD(Liquid Crystal Display，液晶顯示器)相比，不僅能夠輕量化及薄型化，且具有較廣視角、較快應答速度、低耗電等複數個長處，作為新一代顯示裝置而備受關注。 Compared with CRT (cathode ray tube) or LCD (Liquid Crystal Display), organic light-emitting diode (OLED) display devices are not only lighter and thinner, but also have Wide viewing angles, faster response speeds, and low power consumption have attracted much attention as a new generation of display devices.

該OLED顯示裝置被使用於行動電話、TV、數位攝像機、攝錄像機(註冊商標)、個人電腦、導航系統等各種領域。 This OLED display device is used in various fields such as mobile phones, TVs, digital cameras, camcorders (registered trademarks), personal computers, and navigation systems.

構成OLED顯示裝置之OLED面板具備陽極及陰極之電極。通常地，當光自外部向OLED面板入射時，係藉由位於OLED面板內部之有機發光二極體之電極部將光反射。於人注視OLED顯示裝置之情形時，因該反射光而產生感到晃眼、顏色變化、或對比度降低等問題。其原因在於，進入人眼之反射光之強度增加，視認性降低。 An OLED panel constituting an OLED display device includes electrodes of an anode and a cathode. Generally, when light is incident on the OLED panel from the outside, the light is reflected by the electrode portion of the organic light emitting diode located inside the OLED panel. When a person looks at the OLED display device, the reflected light causes problems such as glare, color change, or decrease in contrast. This is because the intensity of the reflected light entering the human eye is increased, and visibility is reduced.

尤其是，於整面發光OLED之情形時，因顯示圖像之圖像定義膜或於圖像定義膜之下部成膜之反射電極，顯示裝置自身之反射率變高，該問題變得更深刻。 In particular, in the case of a whole-surface light-emitting OLED, the problem becomes even deeper due to the high reflectance of the display device due to the image-defining film that displays the image or the reflective electrode formed under the image-defining film. .

因此，為了防止外部光之抗反射，提出有變更OLED面板之構造或導入新的層等多種方法。 Therefore, in order to prevent anti-reflection of external light, various methods have been proposed, such as changing the structure of the OLED panel or introducing a new layer.

於專利文獻1中，係於陽極上形成抗反射膜，且抗反射膜之材料 採用具有選擇性透過性之玻璃或樹脂膜。 In Patent Document 1, an antireflection film is formed on the anode, and the antireflection film is a material Use a glass or resin film with selective permeability.

於專利文獻2中，提出有如下方法：於OLED面板與用於密封該面板之密封基板之間導入按照每個波段選擇性地吸收外部光之物質。 In Patent Document 2, a method is proposed in which a substance that selectively absorbs external light for each band is introduced between an OLED panel and a sealing substrate for sealing the panel.

於專利文獻3中，提出有如下方法：於OLED面板之內部設置突出之複數個光散射隔板及散射罩蓋層，使反射之外部光散射，從而抑制外部光之反射。因物質擴散所致之透過率劣化之比例可用霧度值表示，霧度值越大，擴散透過光之比例越高，而成為渾濁之材料。於該公報中，係將罩蓋層之霧度值(Haze)設為5~30%。 In Patent Document 3, a method is proposed in which a plurality of protruding light-scattering spacers and a scattering cover are provided inside the OLED panel to scatter reflected external light, thereby suppressing reflection of external light. The proportion of the deterioration of the transmittance due to the diffusion of the substance can be expressed by the haze value. The larger the haze value, the higher the proportion of diffused and transmitted light becomes a cloudy material. In this publication, the haze value (Haze) of the cover layer is set to 5 to 30%.

於專利文獻4中，揭示有如下方法：使被彎曲之圖像定義膜反射之外部光散射，而抑制外部光之反射。 Patent Document 4 discloses a method of scattering external light reflected by a curved image defining film and suppressing reflection of external light.

該等方法存在無法充分抑制外部光之反射之情形。尤其是，於利用散射來抑制外部光之反射之情形時，由於上述散射而產生「不均」之色相不均勻之現象。不均勻性係統稱畫面特性不均勻之狀態，尤其於顏色不均勻之情形時係指色相不均勻。色相不均勻為於以黑白表示面板之情形時，整體之畫面未顯示均勻色相，各部位出現色差之現象。例如，係指於畫面整體顯示白色時，畫面整體不能表現完全相同之白色之現象。此種色相不均勻現象係由於製造步驟上之問題或構成面板之素材之種類等多種原因而產生，其原因分析非常困難。 In these methods, reflection of external light cannot be sufficiently suppressed. In particular, when scattering is used to suppress reflection of external light, the phenomenon of "uneven" hue unevenness occurs due to the above-mentioned scattering. The non-uniformity system refers to the state where the characteristics of the picture are not uniform, especially when the color is not uniform. The uneven hue is when the panel is displayed in black and white, the entire screen does not display a uniform hue, and the color difference occurs in various parts. For example, it refers to the phenomenon that when the entire screen displays white, the entire screen cannot express the same white. This kind of uneven hue phenomenon is caused by various reasons such as problems in the manufacturing steps or the types of materials constituting the panel, and the cause analysis is very difficult.

於利用散射來抑制外部光之反射之方法中，大多情形時難以特定並解決色相不均勻現象產生之原因。另一方面，利用散射之方法有時係於為了提高OLED顯示裝置之光效率而於面板內部導入光散射層之手法或使面板內部含有光散射物質之手法中被採用。 In the method of suppressing the reflection of external light by using scattering, it is difficult to specify and solve the cause of the unevenness of hue in most cases. On the other hand, the method of using scattering is sometimes applied to a method of introducing a light scattering layer inside the panel or a method of containing a light scattering substance inside the panel in order to improve the light efficiency of the OLED display device.

於專利文獻5中，揭示有如下顯示裝置：使用於透過可見光之透光性基板內具備將可見光散射之光散射部及透過可見光之透光性開口部之基板，作為有機電場發光元件之光提取基板。 Patent Document 5 discloses a display device that is used in a light-transmitting substrate that transmits visible light and includes a light-scattering portion that scatters visible light and a light-transmitting opening that transmits visible light, as light extraction for an organic electric field light-emitting element Substrate.

於專利文獻6中，提出有如下OLED顯示裝置：具備複數個絕緣 膜，該等絕緣膜具有使自有機發光層放出之光散射之散射圖案，且鄰接之絕緣膜之折射率不同。 Patent Document 6 proposes an OLED display device having a plurality of insulations These insulating films have a scattering pattern that scatters light emitted from the organic light emitting layer, and the refractive indexes of adjacent insulating films are different.

[先前技術文獻] [Prior technical literature] [專利文獻] [Patent Literature]

專利文獻1：韓國公開專利第2007-0003159號公報 Patent Document 1: Korean Published Patent No. 2007-0003159

專利文獻2：韓國公開專利第2011-0011420號公報 Patent Document 2: Korean Published Patent No. 2011-0011420

專利文獻3：美國專利申請公開2010/0171106號公報 Patent Document 3: U.S. Patent Application Publication No. 2010/0171106

專利文獻4：韓國登記專利第10-0742374號公報 Patent Document 4: Korean Registered Patent No. 10-0742374

專利文獻5：韓國公開專利第2005-0013918號公報 Patent Document 5: Korean Published Patent No. 2005-0013918

專利文獻6：韓國公開專利第2013-0016937號公報 Patent Document 6: Korean Published Patent No. 2013-0016937

但，於上述先前技術中，為了提高光效率而採用之利用散射之方法，有可能成為更深刻地產生因外部光之反射所致之色相不均勻現象之主要原因。 However, in the above-mentioned prior art, the method of using scattering in order to improve the light efficiency may become the main cause of the phenomenon of uneven color hue caused by the reflection of external light.

本發明係鑒於此種問題研究而成者，其目的在於提供能夠消除色相不均勻性之OLED顯示裝置及其製造方法。 The present invention has been made in view of such a problem, and an object thereof is to provide an OLED display device capable of eliminating color unevenness and a method for manufacturing the same.

本案發明者等人為了解決上述問題而多方面地進行了研究，結果發現：變更OLED面板內部之構造之方式並不佳，為了於上述面板之表面除去反射光，較佳為貼附偏光膜及相位差膜之方法。與變更面板之內部構造相比，該方法能夠簡便地減少色相不均勻現象。尤其是，於積層有偏光膜之OLED面板中，選定針對各構成元件之與散射關聯之特定之參數，將該選定之參數客觀地數值化來進行控制，藉此能夠消除色相不均勻性。 The inventors of this case conducted various researches in order to solve the above problems, and found that the method of changing the internal structure of the OLED panel is not good. In order to remove reflected light on the surface of the panel, it is preferable to attach a polarizing film and Method of retardation film. Compared with changing the internal structure of the panel, this method can easily reduce the unevenness of hue. In particular, in an OLED panel laminated with a polarizing film, specific parameters related to scattering of each constituent element are selected, and the selected parameters are numerically controlled for objective control, thereby eliminating color unevenness.

第1之OLED顯示裝置之特徵在於具備：OLED面板；λ/4相位差膜， 其貼附於上述OLED面板上；以及偏光膜，其貼附於上述λ/4相位差膜上；且自偏光膜側於SCE(Specular Component Excluded，排除鏡面正反射光)模式下測定之反射率為1.2%以下。 The first OLED display device includes: an OLED panel; a λ / 4 retardation film, It is attached to the above OLED panel; and a polarizing film is attached to the above λ / 4 retardation film; and the self-polarizing film is at the reflectance measured in SCE (Specular Component Excluded) mode. It is 1.2% or less.

第2之OLED顯示裝置之特徵在於具備：第1黏著劑，其介置於上述OLED面板與上述λ/4相位差膜之間；以及第2黏著劑，其介置於上述λ/4相位差膜與上述偏光膜之間。 The second OLED display device includes: a first adhesive agent interposed between the OLED panel and the λ / 4 retardation film; and a second adhesive agent interposed between the λ / 4 retardation film. Between the film and the above-mentioned polarizing film.

第3之OLED顯示裝置之特徵在於，上述第1黏著劑及上述第2黏著劑均包含丙烯酸樹脂。 The third OLED display device is characterized in that each of the first adhesive and the second adhesive includes an acrylic resin.

第4之OLED顯示裝置之特徵在於具備：OLED面板；λ/4相位差膜，其貼附於上述OLED面板上；以及偏光膜，其貼附於上述λ/4相位差膜上；且自偏光膜側於SCE(Specular Component Excluded)模式下測定之反射率R_SCE與自偏光膜側於SCI(Specular Component Included，包含鏡面分量)模式下測定之反射率R_SCI之比率R_SCE/R_SCI滿足以下之關係式：0%<R_SCE/R_SCI≦20%。 The fourth OLED display device includes: an OLED panel; a λ / 4 retardation film attached to the OLED panel; and a polarizing film attached to the λ / 4 retardation film; and self-polarized light The ratio of the reflectance R _SCE measured in the SCE (Specular Component Excluded) mode of the film side to the reflectance R _SCI measured in the SCI (Specular Component Included) mode of the self-polarizing film side R _SCE / R _SCI satisfies the following The relationship is: 0% <R _SCE / R _SCI ≦ 20%.

第5之OLED顯示裝置之特徵在於具備：OLED面板；λ/4相位差膜，其貼附於上述OLED面板上；以及偏光膜，其貼附於上述λ/4相位差膜上；且自上述OLED顯示裝置拆除上述λ/4相位差膜及上述偏光膜，自上述OLED面板之光出射側之表面於SCE模式下測定之反射率r_SCE與自該表面側於SCI模式下測定之反射率r_SCI之比率r_SCE/r_SCI滿足以下之關係式：0%<r_SCE/r_SCI≦70%。 The fifth OLED display device includes: an OLED panel; a λ / 4 retardation film attached to the OLED panel; and a polarizing film attached to the λ / 4 retardation film; and The OLED display device removes the λ / 4 retardation film and the polarizing film, and the reflectance r _SCE measured from the surface on the light exit side of the OLED panel in the SCE mode r _SCE and the reflectance r measured from the surface side in the SCI mode The ratio of _SCI r _SCE / r _SCI satisfies the following relationship: 0% <r _SCE / r _SCI ≦ 70%.

第6之OLED顯示裝置之製造方法之特徵在於，該OLED顯示裝置具備：OLED面板；λ/4相位差膜，其貼附於上述OLED面板上；以及偏光膜，其貼附於上述λ/4相位差膜上；且自偏光膜側於SCE(Specular Component Excluded)模式下測定之反射率為1.2%以下，上述製造方法具備：於OLED面板上貼附λ/4相位差膜之步驟；以及於上述λ/4相位差膜上貼附偏光膜之步驟。 The sixth method of manufacturing an OLED display device is characterized in that the OLED display device includes: an OLED panel; a λ / 4 retardation film attached to the OLED panel; and a polarizing film attached to the λ / 4. The retardation film; and the reflectance measured from the polarizing film side in the SCE (Specular Component Excluded) mode is less than 1.2%. The above manufacturing method includes the steps of attaching a λ / 4 retardation film to the OLED panel; and The step of attaching a polarizing film to the λ / 4 retardation film.

第7之OLED顯示裝置之製造方法之特徵在於，該OLED顯示裝置具備：OLED面板；λ/4相位差膜，其貼附於上述OLED面板上；以及偏光膜，其貼附於上述λ/4相位差膜上；且自偏光膜側於SCE(Specular Component Excluded)模式下測定之反射率為1.2%以下，上述製造方法具備：於偏光膜上貼附λ/4相位差膜來製作圓偏光板之步驟；以及於OLED面板上貼附上述圓偏光板之步驟。 The seventh method of manufacturing an OLED display device is characterized in that the OLED display device includes: an OLED panel; a λ / 4 retardation film attached to the OLED panel; and a polarizing film attached to the λ / 4. The retardation film has a reflectance of 1.2% or less measured in the SCE (Specular Component Excluded) mode from the polarizing film side. The above manufacturing method includes: attaching a λ / 4 retardation film to the polarizing film to make a circularly polarizing plate. Steps; and a step of attaching the above-mentioned circular polarizing plate to the OLED panel.

根據本發明之OLED顯示裝置，能夠消除因散射所致之色相不均勻性，進行色相均勻之顯現。 According to the OLED display device of the present invention, the non-uniformity of hue due to scattering can be eliminated, and uniform hue can be developed.

1‧‧‧OLED面板 1‧‧‧OLED panel

1a‧‧‧支持基板 1a‧‧‧Support substrate

1b‧‧‧框體隔板 1b‧‧‧frame partition

1c‧‧‧被覆層 1c‧‧‧ Coating

1d‧‧‧空間 1d‧‧‧space

1e‧‧‧密封基板 1e‧‧‧sealed substrate

1D‧‧‧驗證用之OLED面板 1D‧‧‧ OLED panel for verification

3‧‧‧λ/4相位差膜 3‧‧‧λ / 4 retardation film

5‧‧‧偏光膜 5‧‧‧ polarizing film

5a‧‧‧偏光元件 5a‧‧‧polarizing element

5b、5c‧‧‧透明保護膜 5b, 5c‧‧‧Transparent protective film

10‧‧‧OLED顯示裝置 10‧‧‧OLED display device

10a‧‧‧電子注入材料 10a‧‧‧ Electron injection material

10b‧‧‧發光層 10b‧‧‧Light-emitting layer

10c‧‧‧電洞輸送層 10c‧‧‧hole transport layer

10'‧‧‧OLED 10'‧‧‧OLED

11、12‧‧‧黏著劑(層) 11, 12‧‧‧ Adhesive (layer)

Ea‧‧‧陽極電極 Ea‧‧‧Anode electrode

Ec‧‧‧陰極電極 Ec‧‧‧ cathode electrode

F‧‧‧彩色濾光片 F‧‧‧Color Filter

R、G、B‧‧‧有機發光二極體 R, G, B‧‧‧ organic light-emitting diodes

Q‧‧‧電晶體 Q‧‧‧Transistor

圖1係OLED顯示裝置之縱剖視圖。 FIG. 1 is a longitudinal sectional view of an OLED display device.

圖2係OLED之層構造及其驅動電路之圖。 FIG. 2 is a diagram of a layer structure and a driving circuit of the OLED.

圖3係驗證用之OLED顯示裝置之樣品之縱剖視圖。 Fig. 3 is a longitudinal sectional view of a sample of an OLED display device for verification.

圖4係樣品No.1~No.5之照片之圖。 Figure 4 is a photograph of samples No. 1 to No. 5.

以下，對實施形態之OLED(Organic Light-Emitting Diode，有機發光二極體)顯示裝置進行說明。再者，對同一要素使用同一符號，並省略重複之說明。 Hereinafter, an OLED (Organic Light-Emitting Diode) display device according to an embodiment will be described. In addition, the same symbols are used for the same elements, and repeated descriptions are omitted.

圖1係OLED顯示裝置之縱剖視圖。 FIG. 1 is a longitudinal sectional view of an OLED display device.

OLED顯示裝置10具備：OLED面板1、經由第1黏著劑11接著於OLED面板1上之λ/4相位差膜3、以及經由第2黏著劑12接著於λ/4相位差膜3上之偏光膜5。 The OLED display device 10 includes an OLED panel 1, a λ / 4 retardation film 3 attached to the OLED panel 1 via a first adhesive 11 and a polarized light adhered to the λ / 4 retardation film 3 via a second adhesive 12. Film 5.

OLED面板1具備：由玻璃等構成之支持基板1a、沿著支持基板1a 之表面之外緣設置之框體隔板1b、以及與支持基板1a一併夾持框體隔板1b之密封基板1e，且該等基板間之空間為密閉，於該空間內配置有複數個發光元件。 The OLED panel 1 includes a support substrate 1a made of glass or the like, and a support substrate 1a along the support substrate 1a. A frame partition 1b provided on the outer edge of the surface, and a sealing substrate 1e that holds the frame partition 1b together with the supporting substrate 1a, and the space between the substrates is sealed, and a plurality of them are arranged in the space. Light emitting element.

於支持基板1a上呈矩陣狀地設置有複數個薄膜電晶體Q，經由被覆薄膜電晶體Q之被覆層1c按照每個像素配置有有機發光二極體R、G、B。有機發光二極體R、G、B為具備有機發光層之發光二極體，能夠根據層構造，進行各種波長之發光。於本例中，於有機發光二極體R、G、B與密封基板1e之間具備紅色、綠色、藍色之彩色濾光片F，但亦可不具備該等濾光片。 A plurality of thin-film transistors Q are provided in a matrix on the support substrate 1a, and organic light-emitting diodes R, G, and B are arranged for each pixel via the coating layer 1c covering the thin-film transistors Q. The organic light emitting diodes R, G, and B are light emitting diodes having an organic light emitting layer, and can emit light at various wavelengths according to the layer structure. In this example, red, green, and blue color filters F are provided between the organic light emitting diodes R, G, and B and the sealing substrate 1e, but these filters may not be provided.

於被覆層1c與密封基板1e之間存在封入有氣體之空間1d，但該空間1d內亦可由樹脂等填充。 A space 1d in which a gas is sealed exists between the coating layer 1c and the sealing substrate 1e, but the space 1d may be filled with a resin or the like.

於密封基板1e上塗佈或積層有第1黏著劑11，第1黏著劑將λ/4相位差膜3接著於密封基板1e之表面。於λ/4相位差膜3上塗佈或積層有第2黏著劑12，第2黏著劑12將偏光膜5接著於λ/4相位差膜3之表面。 A first adhesive 11 is coated or laminated on the sealing substrate 1e. The first adhesive adheres the λ / 4 retardation film 3 to the surface of the sealing substrate 1e. A second adhesive 12 is coated or laminated on the λ / 4 retardation film 3. The second adhesive 12 adheres the polarizing film 5 to the surface of the λ / 4 retardation film 3.

偏光膜5包含偏光元件5b、設置於偏光元件5b之兩側之第1透明保護膜5a及第2透明保護膜5c。偏光元件5b係由吸附並配向二色性色素之聚乙烯醇類樹脂構成。關於第1透明保護膜5a、第2透明保護膜5c，只要為具有保護功能之材料，則並不特別限定，例如包含聚對苯二甲酸乙二酯、三乙醯纖維素。 The polarizing film 5 includes a polarizing element 5b, a first transparent protective film 5a and a second transparent protective film 5c provided on both sides of the polarizing element 5b. The polarizing element 5b is made of a polyvinyl alcohol-based resin that adsorbs and aligns a dichroic dye. The first transparent protective film 5a and the second transparent protective film 5c are not particularly limited as long as they are materials having a protective function, and examples thereof include polyethylene terephthalate and triethylammonium cellulose.

當有機發光二極體R、G、B進行發光時，其光依序經由膜F、密封基板1e、第1黏著劑11、λ/4相位差膜3、第2黏著劑12、及偏光膜5向外部輸出。 When the organic light emitting diodes R, G, and B emit light, their light sequentially passes through the film F, the sealing substrate 1e, the first adhesive 11, the λ / 4 retardation film 3, the second adhesive 12, and the polarizing film. 5 External output.

又，來自外部之光於OLED顯示裝置內之各部位反射而向外部反射。尤其是，位於有機發光二極體R、G、B之表面之電極因反射率高，而造成之反射影響大。 In addition, light from the outside is reflected at various locations in the OLED display device and is reflected to the outside. In particular, the electrodes on the surfaces of the organic light-emitting diodes R, G, and B have high reflectance, which has a large reflection effect.

圖2係有機發光二極體之層構造及其驅動電路之圖。以上述有機 發光二極體R、G、B之一為代表，使用符號10'表示。 FIG. 2 is a diagram of a layer structure of an organic light emitting diode and a driving circuit thereof. Take the above organic One of the light-emitting diodes R, G, and B is represented by a symbol 10 ′.

OLED10'具備：陰極電極Ec、形成於陰極電極Ec上之電子輸送層10a、發光層10b、電洞輸送層10c、及陽極電極Ea。當使薄膜電晶體Q為導通(ON)時，對OLED10'施加電源電位Vc與接地之間之正向偏置電壓。當於陰極電極Ec與陽極電極Ea之間施加正向偏置電壓時，電流於其中流動，電子自陰極電極Ec向發光層10b內流入，電洞自陽極電極Ea向發光層10b內流入，於發光層10b內，電子與電洞再結合而發光。作為電洞輸送層10c，能夠使用芳香族胺化合物等，作為電子注入材料10a，能夠使用金屬錯合物類材料(三(8-羥基喹啉)鋁、

二唑材料(PBD：2-(4-聯苯基)-5-苯基-4-第三丁基苯基)-1,3,4-

二唑)、***類材料(TAZ)。作為發光層10b，能夠使用π共軛類聚合物、含有色素之聚合物等。再者，作為OLED10'之構成材料，存在各種各樣之材料，本發明並不限定於該等。 The OLED 10 'includes a cathode electrode Ec, an electron transport layer 10a formed on the cathode electrode Ec, a light-emitting layer 10b, a hole transport layer 10c, and an anode electrode Ea. When the thin film transistor Q is turned on, a forward bias voltage between the power supply potential Vc and the ground is applied to the OLED 10 '. When a forward bias voltage is applied between the cathode electrode Ec and the anode electrode Ea, current flows therein, electrons flow from the cathode electrode Ec into the light-emitting layer 10b, and holes flow from the anode electrode Ea into the light-emitting layer 10b. In the light emitting layer 10b, electrons and holes are recombined to emit light. As the hole transporting layer 10c, an aromatic amine compound or the like can be used, and as the electron injection material 10a, a metal complex material (tris (8-hydroxyquinoline) aluminum,

Diazole material (PBD: 2- (4-biphenyl) -5-phenyl-4-tert-butylphenyl) -1,3,4-

Diazole), triazole materials (TAZ). As the light emitting layer 10b, a π-conjugated polymer, a polymer containing a pigment, or the like can be used. In addition, there are various materials as constituent materials of the OLED 10 ', and the present invention is not limited to these.

以上，如所說明般，OLED顯示裝置10具有偏光膜5位於OLED面板1上，λ/4相位差膜3位於其等之間之構造。OLED面板1並不限定於此處揭示之面板，能夠應用自先前熟知之面板。又，OLED面板1具有於基板上積層有陽極及陰極，且於上述陰極與陽極之間利用有至少1個有機薄膜層之構造。該等構造於本技術領域中已被熟知，因此省略關於此之詳細說明。 As described above, the OLED display device 10 has a structure in which the polarizing film 5 is located on the OLED panel 1 and the λ / 4 retardation film 3 is located therebetween. The OLED panel 1 is not limited to the panel disclosed here, and can be applied from a previously well-known panel. The OLED panel 1 has a structure in which an anode and a cathode are laminated on a substrate, and at least one organic thin film layer is used between the cathode and the anode. Such structures are well known in the art, and thus detailed descriptions thereof are omitted.

再者，陽極電極Ea例如包含ITO、IZO、IGZO、錫之氧化物、鋅之氧化物、鋅鋁氧化物、以及氮化鈦等金屬氧化物或金屬氮化物；金、鉑、銀、銅、鋁、鎳、鈷、鉛、鉬、鎢、鉭、鈮等金屬；該等金屬之合金或者銅之碘化合物之合金；聚苯胺、聚吡咯、聚苯乙炔、以及聚(3-甲基噻吩)等導電性聚合物材料之至少任一種。陽極電極可僅由上述成分之任一種形成、或者亦可由複數種材料之混合物形成。又，亦能夠形成由相同組成或不同組成之複數個層構成之多層構造。 The anode electrode Ea includes, for example, ITO, IZO, IGZO, oxides of tin, oxides of zinc, zinc aluminum oxide, and metal oxides or metal nitrides such as titanium nitride; gold, platinum, silver, copper, Aluminum, nickel, cobalt, lead, molybdenum, tungsten, tantalum, niobium and other metals; alloys of these metals or alloys of iodine compounds of copper; polyaniline, polypyrrole, polyphenylacetylene, and poly (3-methylthiophene) At least any one of the electrically conductive polymer materials. The anode electrode may be formed of only any one of the above components, or may be formed of a mixture of a plurality of materials. In addition, a multilayer structure composed of a plurality of layers having the same composition or different compositions can be formed.

陰極電極Ec能夠使用於本技術領域中熟知之材料，並無限制，能夠將LiF用作電子注入層，於Al、Ca、Mg、Ag等功函數低之金屬之陰極中使用，較佳為Al。 The cathode electrode Ec can be used in materials well known in the technical field, without limitation, LiF can be used as an electron injection layer, and used in a cathode of a metal having a low work function such as Al, Ca, Mg, Ag, etc. .

位於陽極電極Ea與陰極電極Ec之間之有機薄膜層為了實現紅色、綠色、藍色之發光而包含發光層10b，但除此之外，還包含至少1個電洞注入層、電洞輸送層、電子注入層、電子輸送層。例如，能夠具有包含陽極電極、電洞注入層、電洞輸送層、發光層、電子輸送層、電子注入層、以及陰極電極之積層構造。 The organic thin film layer located between the anode electrode Ea and the cathode electrode Ec includes a light emitting layer 10b in order to realize red, green, and blue light emission, but in addition, it includes at least one hole injection layer and hole transport layer. , Electron injection layer, electron transport layer. For example, it may have a laminated structure including an anode electrode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and a cathode electrode.

關於上述發光層10b，除了作為主要材料之主材料之外，還能夠使用摻雜材料。作為主材料及摻雜材料，已知有各種各種材料，本發明並不限定於此。又，關於電洞注入層、電洞輸送層、電子輸送層及電子注入層，亦已知有各種層，本發明並不限定於此。 Regarding the light-emitting layer 10b described above, a doping material can be used in addition to the main material as a main material. Various kinds of materials are known as the main material and the doping material, and the present invention is not limited thereto. Various layers are also known for the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer, and the present invention is not limited thereto.

又，作為OLED面板1之驅動方式，存在被動(PM)型及主動(AM)型，可應用任一者。 In addition, as a driving method of the OLED panel 1, there are a passive (PM) type and an active (AM) type, and any of them can be applied.

關於陽極電極Ea及陰極電極Ec之材料，能夠使用金、銀、銅、鋁等金屬。例如，於作為陽極電極Ea而使用了鋁之情形時，陽極電極Ea亦作為反射來自外部之光之反射鏡發揮作用。陰極電極Ec亦同樣。於圖1中之密封基板1e之背面(形成有黏著劑層11之面之相反側之面)蒸鍍鋁等之金屬膜而形成反射鏡，若檢查其光學特性，認為關於外部光之反射，示出與OLED顯示裝置中之情形大致相同之舉動。因此，本案發明者等人製作此種驗證用OLED顯示裝置，並對光學特性進行了銳意研討。 As the material of the anode electrode Ea and the cathode electrode Ec, metals such as gold, silver, copper, and aluminum can be used. For example, when aluminum is used as the anode electrode Ea, the anode electrode Ea also functions as a mirror that reflects light from the outside. The same applies to the cathode electrode Ec. On the back surface of the sealing substrate 1e in FIG. 1 (the surface opposite to the surface on which the adhesive layer 11 is formed), a metal film such as aluminum is vapor-deposited to form a reflector. If the optical characteristics are checked, it is considered that the reflection of external light, The same behavior as that in the OLED display device is shown. Therefore, the inventors of the present invention produced such an OLED display device for verification, and conducted intensive studies on optical characteristics.

圖3係驗證用OLED顯示裝置之樣品之縱剖視圖。 Fig. 3 is a longitudinal sectional view of a sample of an OLED display device for verification.

驗證用OLED顯示裝置具備驗證用之OLED面板1D來代替OLED面板1。於圖1中之密封基板1e之背面(形成有黏著劑層11之面之相反側之面)蒸鍍鋁等之金屬膜，假想地將其視為陽極電極Ea及陰極電極Ec(於 圖3中為Ez)，於驗證用之OLED面板1D中，省略了OLED面板1之剩餘元件。 The verification OLED display device includes an verification OLED panel 1D instead of the OLED panel 1. A metal film such as aluminum is vapor-deposited on the back surface of the sealing substrate 1e (the surface opposite to the surface on which the adhesive layer 11 is formed) in FIG. (Ez in FIG. 3). In the OLED panel 1D for verification, the remaining components of the OLED panel 1 are omitted.

再者，於說明中，存在引用以下之3個(式1)~(式3)之情形。 It should be noted that in the description, the following three expressions (Expression 1) to (Expression 3) may be cited.

(式1)：R_SCE≦1.2%。 (Equation 1): R _SCE ≦ 1.2%.

(式2)：0%<R_SCE/R_SCI≦20%。 (Equation 2): 0% <R _SCE / R _SCI ≦ 20%.

(式3)：0%<r_SCE/r_SCI≦70%。 (Equation 3): 0% <r _SCE / r _SCI ≦ 70%.

(式1)示出了：具備上述OLED面板1、貼附於OLED面板1上之λ/4相位差膜3、以及貼附於λ/4相位差膜3上之偏光膜5，且自偏光膜5側於SCE(Specular Component Excluded)模式下測定之反射率R_SCE為1.2%以下。 (Expression 1) shows that the OLED panel 1, the λ / 4 retardation film 3 attached to the OLED panel 1, and the polarizing film 5 attached to the λ / 4 retardation film 3 are provided, and self-polarized light is provided. The reflectance R _SCE measured in the SCE (Specular Component Excluded) mode of the film 5 side is 1.2% or less.

(式2)係具備上述OLED面板1、貼附於OLED面板1上之λ/4相位差膜3、以及貼附於λ/4相位差膜3上之偏光膜5，且自偏光膜5側於SCE(Specular Component Excluded)模式下測定之反射率R_SCE與自偏光膜5側於SCI(Specular Component Included)模式下測定之反射率R_SCI之比率R_SCE/R_SCI滿足之關係式。 (Expression 2) is provided with the OLED panel 1, the λ / 4 retardation film 3 attached to the OLED panel 1, and the polarizing film 5 attached to the λ / 4 retardation film 3, and the self-polarizing film 5 side The relationship between the ratio of reflectance R _SCE measured in the SCE (Specular Component Excluded) mode and the reflectance R _SCI measured in the SCI (Specular Component Included) mode of the self-polarizing film 5 R _SCE / R _SCI satisfies the relationship.

另一方面，(式3)係自該狀態拆除λ/4相位差膜3及偏光膜5而自OLED面板1(1D)之光出射側之表面(外部光之入射面)於SCE模式下測定之反射率r_SCE與自該表面側於SCI模式下測定之反射率r_SCI之比率r_SCE/r_SCI滿足之關係式。藉由滿足該等(式1)~(式3)之關係式之任意1個或2個或全部，而改善色相不均勻性(顏色不均現象)。較佳為滿足該等(式1)~(式3)之關係式中之(式1)，更佳為滿足(式1)且滿足(式2)或(式3)或者(式2)與(式3)兩者。 On the other hand, (Formula 3) is measured in the SCE mode from the surface (incident surface of external light) from the light emitting side of the OLED panel 1 (1D) by removing the λ / 4 retardation film 3 and the polarizing film 5 from this state. The relation between the reflectance r _SCE and the reflectance r _SCI measured in the SCI mode from the surface side r _SCE / r _SCI satisfies the relationship. By satisfying any one or two or all of the relational expressions (Expression 1) to (Expression 3), the hue unevenness (color unevenness phenomenon) is improved. It is preferable to satisfy (Expression 1) in the relational expressions of (Expression 1) to (Expression 3), and it is more preferable to satisfy (Expression 1) and satisfy (Expression 2) or (Expression 3) or (Expression 2) and (Equation 3) Both.

影響色相之不均勻性之主要原因有(A)偏光膜5、(B)λ/4相位差膜3、(C)第1黏著劑11及第2黏著劑12、(D)支持基板1e、(E)作為陽極電極Ea之金屬膜或金屬片材。 The main factors affecting the unevenness of hue are (A) polarizing film 5, (B) λ / 4 retardation film 3, (C) first adhesive 11 and second adhesive 12, and (D) support substrate 1e, (E) A metal film or a metal sheet as the anode electrode Ea.

以下，與各元件(A)~(E)一併說明上述(式1)~(式3)與色相不均勻 性之關係。 Hereinafter, the above-mentioned (Expression 1) to (Expression 3) and the unevenness of hue will be described together with each of the elements (A) to (E). Sexual relationship.

(A)偏光膜5 (A) Polarizing film 5

(A-1)偏光膜之特性 (A-1) Characteristics of polarizing film

偏光膜5擔負將自外部入射之自然光(外部光)變換為直線偏振光而遮斷來自OLED面板之反射光以抑制外部光之反射之作用。與偏光膜5之光學特徵關聯之參數有單體透過率(Ty)、平行透過率(Tp)、正交透過率(Tc)、偏振度、a*、b*等。 The polarizing film 5 is responsible for converting natural light (external light) incident from the outside into linearly polarized light and blocking reflected light from the OLED panel to suppress reflection of external light. The parameters associated with the optical characteristics of the polarizing film 5 are the single transmittance (Ty), parallel transmittance (Tp), orthogonal transmittance (Tc), degree of polarization, a *, b *, and the like.

上述偏光膜5發揮上述作用且積層於OLED面板1之上，故需要鑒於來自OLED面板1之光之出射效率來考慮單體透過率(Ty)，OLED顯示裝置10需要以能夠顯現鮮明之藍色之方式考慮並調整b*值。 The above-mentioned polarizing film 5 exerts the above-mentioned functions and is laminated on the OLED panel 1. Therefore, it is necessary to consider the single transmittance (Ty) in view of the light emission efficiency of the light from the OLED panel 1. The OLED display device 10 needs to be able to express a vivid blue Consider and adjust the b * value.

(A-2)單體透過率(Ty) (A-2) Transmittance of monomer (Ty)

偏光膜5之單體透過率(Ty)%於理論值中為50%，為了滿足上述(式2)，較佳為滿足以下之關係式。 The monomer transmittance (Ty)% of the polarizing film 5 is 50% of the theoretical value. In order to satisfy the above-mentioned (Expression 2), it is preferable to satisfy the following relational expression.

40%≦Ty≦44.95%。 40% ≦ Ty ≦ 44.95%.

若該Ty之數值範圍小於上述關係式之範圍之下限值，為了得到固定水準以上之亮度，需要提高OLED面板1之輸出，其結果為，OLED顯示裝置之發光壽命減少。又，於Ty之數值範圍大於上述關係式之範圍之上限值之情形時，存在無法將外部光充分變換為直線偏振光，而外部光之反射率變高之問題。 If the value range of Ty is smaller than the lower limit of the range of the above-mentioned relational expressions, in order to obtain brightness above a fixed level, the output of the OLED panel 1 needs to be increased. As a result, the light emitting lifetime of the OLED display device is reduced. Moreover, when the numerical range of Ty is larger than the upper limit of the range of the above-mentioned relational expression, there is a problem that external light cannot be sufficiently converted into linearly polarized light, and the reflectance of external light becomes high.

(A-3)b*值 (A-3) b * value

關於b*值，越具有負之數值，越示出藍色，越具有正之數值，越示出黃色。關於偏光膜5之b*值，較佳使用正交b*值。較佳為，本發明之偏光膜5為了滿足(式2)而正交b*值理想為-15以上且0以下。即，為以下之關係式。 As for the b * value, the more negative the numerical value, the more blue, and the more positive the numerical value, the more yellow. As for the b * value of the polarizing film 5, it is preferable to use an orthogonal b * value. In order to satisfy (Expression 2), the orthogonal b * value of the polarizing film 5 of the present invention is preferably -15 or more and 0 or less. That is, it is the following relational expression.

-15≦b*≦0。 -15 ≦ b * ≦ 0.

於b*值為大於0之值之情形時(例如為+5)，難以實現鮮明之藍色， 於為小於-15之值之情形時，產生外部光之反射率變高之問題，因此，以滿足上述範圍之方式進行調節。 When the b * value is greater than 0 (for example, +5), it is difficult to achieve a vivid blue color, When the value is less than -15, there is a problem that the reflectance of external light becomes high. Therefore, the adjustment is performed so as to satisfy the above range.

於偏光膜5中，存在單體透過率(Ty)之較佳範圍及正交b*值之較佳範圍，但較佳為滿足至少任一者之較佳範圍，更佳為滿足兩者之較佳範圍。 In the polarizing film 5, there is a preferable range of the monomer transmittance (Ty) and a preferable range of the orthogonal b * value, but it is preferably to satisfy at least either of the preferable ranges, and more preferably to satisfy both. Better range.

偏光膜5通常係由偏光元件及其兩側之透明保護膜構成。 The polarizing film 5 is generally composed of a polarizing element and transparent protective films on both sides thereof.

(A-4)偏光膜內之偏光元件 (A-4) Polarizing element in polarizing film

作為偏光膜內之偏光元件之材料，能夠使用以下之材料。 As the material of the polarizing element in the polarizing film, the following materials can be used.

如上述般，構成偏光膜之偏光元件為使二色性色素吸附並配向於單軸延伸之聚乙烯醇類樹脂膜而成者。該等聚乙烯醇類樹脂可經改性，例如亦能夠使用由醛類改性後之聚乙烯醇縮甲醛、聚乙烯醇縮乙醛、聚乙烯醇縮丁醛等。 As described above, the polarizing element constituting the polarizing film is a polyvinyl alcohol-based resin film in which a dichroic dye is adsorbed and aligned on a uniaxially stretched film. These polyvinyl alcohol-based resins may be modified, and for example, polyvinyl formal, polyvinyl acetal, polyvinyl butyral, etc., which are modified with aldehydes, may also be used.

使用對該聚乙烯醇類樹脂進行製膜而成者，作為偏光膜之坯膜。對聚乙烯醇類樹脂進行製膜之方法並不特別限定，能夠使用先前熟知之適當之方法來製膜。包含聚乙烯醇類樹脂之坯膜之膜厚並不特別限定，例如為10~150μm左右。通常，以卷狀供給，厚度為20~100μm之範圍內，較佳為30~80μm之範圍內，又，於工業上之實用寬度為1500~6000mm之範圍內。 A film made of this polyvinyl alcohol-based resin was used as a base film of a polarizing film. The method of forming a polyvinyl alcohol-type resin into a film is not specifically limited, A suitable method well-known previously can be used for film formation. The film thickness of the raw film containing a polyvinyl alcohol-based resin is not particularly limited, and is, for example, about 10 to 150 μm. Generally, it is supplied in a roll shape, with a thickness in the range of 20 to 100 μm, preferably in the range of 30 to 80 μm, and in the industrial practical range of 1500 to 6000 mm.

有市售之聚乙烯醇類膜(維尼綸VF-PS#7500、KURARAY製/OPL膜M-7500、日本合成製)之坯片厚度為75μm等，(維尼綸VF-PS#6000、KURARAY製、維尼綸VF-PE#6000、KURARAY製)之坯片厚度為60μm等。 There are commercially available polyvinyl alcohol films (Vinlon VF-PS # 7500, KURARAY / OPL film M-7500, made in Japan) with a thickness of 75 μm, etc. (Vinlon VF-PS # 6000, manufactured by KURARAY , Vinylon VF-PE # 6000, made by KURARAY), the thickness of the blank is 60μm, etc.

偏光膜通常係經由使用二色性色素對聚乙烯醇類樹脂膜進行染色來使二色性色素吸附之步驟(染色處理步驟)、藉由硼酸水溶液處理吸附有二色性色素之聚乙烯醇類樹脂膜之步驟(硼酸處理步驟)、以及於利用該硼酸水溶液之處理後進行水洗之步驟(水洗處理步驟)而製 造。 The polarizing film is usually a step of dyeing a polyvinyl alcohol resin film by using a dichroic pigment to adsorb the dichroic pigment (dyeing process step), and treating a polyvinyl alcohol having the dichroic pigment adsorbed by an aqueous boric acid solution A resin film step (boric acid treatment step), and a step of washing with water after the treatment with the boric acid aqueous solution (water washing step) Made.

又，於偏光膜之製造時，通常係使聚乙烯醇類樹脂膜單軸延伸，該單軸延伸可於染色處理步驟之前進行，亦可於染色處理步驟中進行，還可於染色處理步驟之後進行。於染色處理步驟之後進行單軸延伸之情形時，該單軸延伸可於硼酸處理步驟之前進行，亦可於硼酸處理步驟中進行。當然，亦能夠於該等複數個階段中進行單軸延伸。 In the production of polarizing films, the polyvinyl alcohol resin film is usually uniaxially stretched, and the uniaxial stretching may be performed before or during the dyeing treatment step, or after the dyeing treatment step. get on. In the case where uniaxial stretching is performed after the dyeing treatment step, the uniaxial stretching may be performed before the boric acid treatment step, or may be performed in the boric acid treatment step. Of course, uniaxial extension can also be performed in these plural stages.

染色處理步驟中之聚乙烯醇類樹脂膜之利用二色性色素之染色係例如藉由將聚乙烯醇類樹脂膜浸漬於含有二色性色素之水溶液中來進行。作為二色性色素，例如使用碘、二色性染料等。於二色性染料中，例如包含由C.I.直接紅(C.I.DIRECT RED)39等雙偶氮化合物形成之二色性染料、由三偶氮、四偶氮(tetrakis azo)等化合物形成之二色性染料。再者，關於聚乙烯醇類樹脂膜，較佳為於染色處理之前實施朝水中之浸漬處理。 The dyeing of the polyvinyl alcohol-based resin film in the dyeing process step using a dichroic dye is performed, for example, by immersing the polyvinyl alcohol-based resin film in an aqueous solution containing a dichroic dye. Examples of the dichroic dye include iodine and a dichroic dye. The dichroic dyes include, for example, a dichroic dye formed from a diazo compound such as CIDIRECT RED 39, and a dichroic dye formed from a compound such as triazo or tetrakis azo. dye. In addition, as for the polyvinyl alcohol-based resin film, it is preferable to perform an immersion treatment in water before the dyeing treatment.

於使用碘作為二色性色素之情形時，通常係採用將聚乙烯醇類樹脂膜浸漬於含有碘及碘化鉀之水溶液中來染色之方法。關於該水溶液中之碘之含量，通常係每100重量份之水中含有0.01~1重量份，關於碘化鉀之含量，通常係每100重量份之水中含有0.5~20重量份。於使用碘作為二色性色素之情形時，用於染色之水溶液之溫度通常為20~40℃，向該水溶液之浸漬時間(染色時間)通常為20~1800秒。 When iodine is used as a dichroic dye, a method of dyeing a polyvinyl alcohol resin film by immersing it in an aqueous solution containing iodine and potassium iodide is generally adopted. The content of iodine in the aqueous solution is usually 0.01 to 1 part by weight per 100 parts by weight of water, and the content of potassium iodide is usually 0.5 to 20 parts by weight per 100 parts by weight of water. When using iodine as a dichroic pigment, the temperature of the aqueous solution used for dyeing is usually 20 to 40 ° C, and the immersion time (dyeing time) into the aqueous solution is usually 20 to 1800 seconds.

另一方面，於使用二色性染料作為二色性色素之情形時，通常係採用將聚乙烯醇類樹脂膜浸漬於包含二色性染料之水溶液中來染色之方法。關於該水溶液中之二色性染料之含量，通常係每100重量份之水含有1×10^-4~10重量份，較佳為1×10^-3~1重量份，尤佳為1×10^-3~1×10^-2重量份。該水溶液亦可含有硫酸鈉等無機鹽作為染色助劑。於使用二色性染料作為二色性色素之情形時，用於染色之染料水溶液之溫度通常為20~80℃，又，向該水溶液之浸漬時間(染色時間)通常為10~1800 秒。 On the other hand, when a dichroic dye is used as a dichroic dye, a method of dyeing a polyvinyl alcohol-based resin film in an aqueous solution containing a dichroic dye is generally adopted. Regarding the content of the dichroic dye in the aqueous solution, it usually contains 1 × 10 ^-4 to 10 parts by weight per 100 parts by weight of water, preferably 1 × 10 ^-3 to 1 part by weight, particularly preferably 1 × 10. ^-3 ~ 1 × 10 ^-2 parts by weight. This aqueous solution may contain an inorganic salt such as sodium sulfate as a dyeing aid. When a dichroic dye is used as the dichroic dye, the temperature of the dye aqueous solution used for dyeing is usually 20 to 80 ° C, and the immersion time (dyeing time) into the aqueous solution is usually 10 to 1800 seconds.

硼酸處理步驟係藉由將由二色性色素染色後之聚乙烯醇類樹脂膜浸漬於含有硼酸水溶液中來進行。關於含有硼酸水溶液中之硼酸之量，通常係每100重量份之水含有2~15重量份，較佳為5~12重量份。於使用了碘作為上述之染色處理步驟中之二色性色素之情形時，用於該硼酸處理步驟之含有硼酸水溶液較佳含有碘化鉀。於該情形時，關於含有硼酸水溶液中之碘化鉀之量，通常係每100重量份之水含有0.1~15重量份，較佳為5~12重量份。向含有硼酸水溶液之浸漬時間通常為60~1200秒，較佳為150~600秒，更佳為200~400秒。含有硼酸水溶液之溫度通常為40℃以上，較佳為50~85℃，更佳為55~75℃。 The boric acid treatment step is performed by immersing a polyvinyl alcohol-based resin film dyed with a dichroic dye in an aqueous solution containing boric acid. Regarding the amount of boric acid in the boric acid-containing aqueous solution, it usually contains 2 to 15 parts by weight, preferably 5 to 12 parts by weight, per 100 parts by weight of water. In the case where iodine is used as the dichroic pigment in the above-mentioned dyeing treatment step, the boric acid-containing aqueous solution used in the boric acid treatment step preferably contains potassium iodide. In this case, the amount of potassium iodide in the aqueous solution containing boric acid is usually 0.1 to 15 parts by weight, preferably 5 to 12 parts by weight, per 100 parts by weight of water. The immersion time into the aqueous solution containing boric acid is usually 60 to 1200 seconds, preferably 150 to 600 seconds, and more preferably 200 to 400 seconds. The temperature of the aqueous solution containing boric acid is usually 40 ° C or higher, preferably 50 to 85 ° C, and more preferably 55 to 75 ° C.

於接下來之水洗處理步驟中，藉由將上述硼酸處理後之聚乙烯醇類樹脂膜浸漬於例如水中來進行水洗處理。水洗處理中之水之溫度通常為4~40℃，浸漬時間通常為1~120秒。水洗處理後通常實施乾燥處理，得到偏光膜。關於乾燥處理，例如，較佳使用熱風乾燥機、遠紅外線加熱器等來進行。乾燥處理之溫度通常為30~100℃，較佳為50~80℃。乾燥處理之時間通常為60~600秒，較佳為120~600秒。 In the subsequent water washing treatment step, the polyvinyl alcohol resin film after the boric acid treatment is immersed in, for example, water to perform a water washing treatment. The temperature of the water in the water washing treatment is usually 4 to 40 ° C, and the immersion time is usually 1 to 120 seconds. After the water washing treatment, a drying treatment is usually performed to obtain a polarizing film. The drying process is preferably performed using, for example, a hot-air dryer, a far-infrared heater, or the like. The temperature of the drying treatment is usually 30 to 100 ° C, preferably 50 to 80 ° C. The drying time is usually 60 to 600 seconds, preferably 120 to 600 seconds.

如此，對聚乙烯醇類樹脂膜實施單軸延伸、利用二色性色素之染色、硼酸處理及水洗處理，得到偏光膜。該偏光膜之厚度通常為5~50μm之範圍內。 In this manner, the polyvinyl alcohol-based resin film was subjected to uniaxial stretching, dyeing with a dichroic dye, boric acid treatment, and water washing treatment to obtain a polarizing film. The thickness of the polarizing film is usually within a range of 5 to 50 μm.

(A-5)偏光膜內之透明保護膜 (A-5) Transparent protective film in polarizing film

透明保護膜係因偏光元件機械強度弱而用於保護偏光元件者。透濕度由於形成透明保護膜之樹脂之種類而不同，能夠根據透明性、機械強度、熱穩定性、水分遮蔽性及各向同性而選擇使用。作為形成上述透明保護膜之材料，並無限制，只要為於該領域中熟知之材料，便可使用任一種。 The transparent protective film is used for protecting the polarizing element because the mechanical strength of the polarizing element is weak. The moisture permeability varies according to the type of resin forming the transparent protective film, and can be selected and used according to transparency, mechanical strength, thermal stability, moisture shielding property, and isotropy. The material for forming the transparent protective film is not limited, and any material may be used as long as it is a material well known in the art.

上述透明保護膜之厚度並無限定，但於過薄之情形時，強度及加 工性降低，若過厚則存在透明度降低之問題。該等透明保護膜之厚度只要為5~200μm以下，較佳為10~150μm以下，更佳為20~100μm以下即可。 The thickness of the transparent protective film is not limited, but when the thickness is too thin, The workability is reduced, and if it is too thick, there is a problem that the transparency is reduced. The thickness of these transparent protective films may be 5 to 200 μm or less, preferably 10 to 150 μm or less, and more preferably 20 to 100 μm or less.

作為上述偏光元件之透明保護膜，能夠使用接著劑或黏著劑。作為接著劑，例如有溶劑型接著劑、乳液型接著劑、壓敏接著劑、無溶劑型接著劑、膜狀之接著劑、熱熔型接著劑等。作為較佳之接著劑之一，存在水類接著劑，即，將接著劑之原料溶解或分散於水中。水類接著劑能夠充分地接合偏光元件與透明保護膜，光學透過率優異，只要沒有對黃色著色等之變化，則其種類並無特別限制。例如，存在聚乙烯醇類樹脂或具有親水基之胺基甲酸酯類樹脂。水類接著劑能夠與混合到接著劑之原料中之追加之添加劑一併與水混合來製備。於水類接著劑之市售聚乙烯醇類樹脂中有由(股份)KURARAY販賣之羧酸改性聚乙烯醇之「KL-318」(商號)等。 As the transparent protective film of the polarizing element, an adhesive or an adhesive can be used. Examples of the adhesive include a solvent-based adhesive, an emulsion-based adhesive, a pressure-sensitive adhesive, a solventless adhesive, a film-shaped adhesive, and a hot-melt adhesive. As one of the preferable adhesives, there is an aqueous adhesive, that is, the raw material of the adhesive is dissolved or dispersed in water. The water-based adhesive can sufficiently bond the polarizing element and the transparent protective film, and has excellent optical transmittance. The type of the water-based adhesive is not particularly limited as long as there is no change in yellowing or the like. For example, there are a polyvinyl alcohol-based resin or a urethane-based resin having a hydrophilic group. The water-based adhesive can be prepared by mixing it with water together with additional additives added to the raw material of the adhesive. Among the commercially available polyvinyl alcohol resins for water-based adhesives are "KL-318" (trade name) of carboxylic acid-modified polyvinyl alcohol sold by (Kuraray).

用作透明保護膜之黏著劑，能夠使用丙烯酸類、矽酮類、橡膠類、胺基甲酸酯類、聚酯類或環氧類共聚物等，較佳為丙烯酸類共聚物，更佳為壓敏性之丙烯酸類黏著劑。 As an adhesive for transparent protective films, acrylic, silicone, rubber, urethane, polyester or epoxy copolymers can be used, preferably acrylic copolymers, more preferably pressure Sensitive acrylic adhesive.

透明保護膜之向偏光元件之接合能夠使用於該領域中通常熟知之方法，例如有藉由線棒塗佈法、凹版塗佈法、模塗法或噴霧法等，向偏光元件、透明保護膜或者兩者之接合面塗佈接著劑或黏著劑，而將其等接合之方法。 The bonding of the transparent protective film to the polarizing element can be used in a method generally known in the field. For example, the polarizing element or the transparent protective film can be applied by a bar coating method, a gravure coating method, a die coating method, or a spray method. Or a method in which an adhesive or an adhesive is applied to a joint surface of the two, and the two are joined.

又，為了提高透明保護膜與所接合之偏光元件之密接力，能夠對透明保護膜之表面適當地進行電漿處理、電暈處理、紫外線照射處理、火焰(flame)處理、皂化處理等表面處理。 In addition, in order to improve the adhesion between the transparent protective film and the bonded polarizing element, the surface of the transparent protective film can be appropriately subjected to surface treatments such as plasma treatment, corona treatment, ultraviolet irradiation treatment, flame treatment, and saponification treatment. .

(B)λ/4相位差膜3 (B) λ / 4 retardation film 3

(B-1)λ/4相位差膜之功能及性能 (B-1) Functions and properties of λ / 4 retardation film

與上述偏光膜5一併積層於OLED面板1之λ/4相位差膜3具有利用 相位差將來自偏光膜5之直線偏振光變換為圓偏振光(右圓偏振光或左圓偏振光)，並將由OLED面板1反射之圓偏振光(左圓偏振光或右圓偏振光)再次變換為直線偏振光(此時之直線偏振光之振動方向與偏光膜之吸收軸一致)之功能。 The λ / 4 retardation film 3 laminated on the OLED panel 1 together with the above-mentioned polarizing film 5 is useful The phase difference converts linearly polarized light from the polarizing film 5 into circularly polarized light (right circularly polarized light or left circularly polarized light), and reflects circularly polarized light (left circularly polarized light or right circularly polarized light) reflected by the OLED panel 1 again. The function of converting into linearly polarized light (the vibration direction of the linearly polarized light at this time coincides with the absorption axis of the polarizing film).

再者，OLED顯示裝置之製造方法係製造具備OLED面板1、貼附於OLED面板1上之λ/4相位差膜3、以及貼附於λ/4相位差膜3上之偏光膜5，且自偏光膜5側於SCE(Specular Component Excluded)模式下測定之反射率為1.2%以下之OLED顯示裝置的方法，且可具備於OLED面板1上貼附λ/4相位差膜3之步驟、以及於λ/4相位差膜3上貼附偏光膜5之步驟。 Furthermore, the manufacturing method of the OLED display device includes manufacturing an OLED panel 1, a λ / 4 retardation film 3 attached to the OLED panel 1, and a polarizing film 5 attached to the λ / 4 retardation film 3, and A method for an OLED display device having a reflectance of 1.2% or less measured in the SCE (Specular Component Excluded) mode on the 5 side of the self-polarizing film, and may include a step of attaching a λ / 4 retardation film 3 on the OLED panel 1, and A step of attaching a polarizing film 5 to the λ / 4 retardation film 3.

又，OLED顯示裝置之製造方法係製造具備OLED面板1、貼附於OLED面板1上之λ/4相位差膜3、以及貼附於λ/4相位差膜3上之偏光膜5，且自偏光膜5側於SCE(Specular Component Excluded)模式下測定之反射率為1.2%以下之OLED顯示裝置的方法，且可具備於偏光膜5上貼附λ/4相位差膜3來製作圓偏光板之步驟、以及於OLED面板1上貼附該圓偏光板之步驟。 In addition, the manufacturing method of the OLED display device includes manufacturing an OLED panel 1, a λ / 4 retardation film 3 attached to the OLED panel 1, and a polarizing film 5 attached to the λ / 4 retardation film 3. A method for an OLED display device having a reflectance of 1.2% or less measured in SCE (Specular Component Excluded) mode on the side of the polarizing film 5 side, and may include attaching a λ / 4 retardation film 3 to the polarizing film 5 to make a circular polarizing plate And a step of attaching the circular polarizing plate to the OLED panel 1.

與λ/4相位差膜3之光學特徵關聯之參數為面內相位差之值(Ro)，為了OLED顯示裝置之抗反射，需要考慮面內相位差之值(Ro)。 The parameter associated with the optical characteristics of the λ / 4 retardation film 3 is the value of the in-plane retardation (Ro). For the anti-reflection of the OLED display device, the value of the in-plane retardation (Ro) needs to be considered.

λ/4相位差膜3之550nm之測定之相位差之值(Ro)之範圍為130nm~155nm，較佳為135~150nm。於上述面內相位差之值(Ro)之範圍外之情形時，OLED顯示裝置之反射率變高，抗反射效果降低。 The range of the retardation value (Ro) measured at 550 nm of the λ / 4 retardation film 3 is 130 nm to 155 nm, preferably 135 to 150 nm. In the case where the value of the in-plane phase difference (Ro) is out of the above range, the reflectance of the OLED display device becomes high, and the anti-reflection effect decreases.

於入射有波長λ=550nm之光之情形時，於面內，產生之相位差之偏差量較佳為上述範圍。即，於λ/4相位差膜3之膜厚均勻性高且面內之相位差值為入射波長550nm之4分之一之137nm附近之情形時，認為不產生如出現反射不均之反射率增加。 When light having a wavelength of λ = 550 nm is incident, the amount of deviation of the phase difference generated in the plane is preferably within the above range. That is, in the case where the uniformity of the thickness of the λ / 4 retardation film 3 is high and the in-plane retardation value is around 137 nm, which is a quarter of the incident wavelength of 550 nm, it is considered that no reflectance such as reflection unevenness occurs. increase.

(B-2)λ/4相位差膜之材料 (B-2) Material of λ / 4 retardation film

作為λ/4相位差膜3，可舉出利用液晶塗佈之λ/4液晶塗佈層或利用膜之延伸之λ/4延伸相位差膜。作為形成利用液晶塗佈之λ/4液晶塗佈層之材料，例如，能夠使用具有能夠藉由熱或光交聯之聚合性基之聚合性液晶。由聚合性液晶形成之λ/4液晶塗佈層之光學特性能夠藉由聚合性液晶之配向狀態調節。 Examples of the λ / 4 retardation film 3 include a λ / 4 liquid crystal coating layer coated with a liquid crystal or a λ / 4 stretched retardation film using an extension of the film. As a material for forming a λ / 4 liquid crystal coating layer coated with a liquid crystal, for example, a polymerizable liquid crystal having a polymerizable group capable of being crosslinked by heat or light can be used. The optical characteristics of the λ / 4 liquid crystal coating layer formed of the polymerizable liquid crystal can be adjusted by the alignment state of the polymerizable liquid crystal.

作為聚合性液晶，可舉出棒狀之聚合性液晶及圓盤狀之聚合性液晶。 Examples of the polymerizable liquid crystal include a rod-shaped polymerizable liquid crystal and a disc-shaped polymerizable liquid crystal.

於棒狀之聚合性液晶相對於基材進行水平配向或垂直配向之情形時，該聚合性液晶之光軸與該聚合性液晶之長軸方向一致。 When the rod-like polymerizable liquid crystal is aligned horizontally or vertically with respect to the substrate, the optical axis of the polymerizable liquid crystal is aligned with the long axis direction of the polymerizable liquid crystal.

於圓盤狀之聚合性液晶進行配向之情形時，該聚合性液晶之光軸存在於與該聚合性液晶之圓盤面正交之方向。 When the disc-shaped polymerizable liquid crystal is aligned, the optical axis of the polymerizable liquid crystal exists in a direction orthogonal to the disc surface of the polymerizable liquid crystal.

為了使藉由使聚合性液晶聚合而形成之層顯現面內相位差，只要使聚合性液晶沿適當之方向配向即可。於聚合性液晶為棒狀之情形時，使該聚合性液晶之光軸相對於基材平面沿水平配向，由此，顯現面內相位差，於該情形時，光軸方向與遲相軸方向一致。於聚合性液晶為圓盤狀之情形時，將該聚合性液晶之光軸相對於基材平面沿水平配向，由此，顯現面內相位差，於該情形時，光軸與遲相軸正交。能夠藉由配向膜與聚合性液晶之組合而調整聚合性液晶之配向狀態。 In order for the layer formed by polymerizing the polymerizable liquid crystal to show an in-plane retardation, the polymerizable liquid crystal may be aligned in an appropriate direction. In the case where the polymerizable liquid crystal is rod-shaped, the optical axis of the polymerizable liquid crystal is aligned horizontally with respect to the plane of the substrate, thereby showing an in-plane phase difference. In this case, the optical axis direction and the late phase axis direction Consistent. In the case where the polymerizable liquid crystal is disc-shaped, the optical axis of the polymerizable liquid crystal is aligned horizontally with respect to the plane of the substrate, thereby showing an in-plane phase difference. In this case, the optical axis and the late phase axis are positive. cross. The alignment state of the polymerizable liquid crystal can be adjusted by a combination of the alignment film and the polymerizable liquid crystal.

<聚合性液晶> <Polymerizable liquid crystal>

所謂聚合性液晶係指具有聚合性基且具有液晶性之化合物。聚合性基係指參與聚合反應之基，較佳為光聚合性基。於此，光聚合性基係指能夠藉由自後述之光聚合起始劑產生之活性自由基或酸等參與聚合反應之基。作為聚合性基，可舉出：乙烯基、乙烯氧基、1-氯乙烯基、異丙烯基、4-乙烯基苯基、丙烯醯氧基、甲基丙烯醯氧基、環氧乙烷基、氧雜環丁基等。其中，較佳為丙烯醯氧基、甲基丙烯醯氧基、乙烯氧基、環氧乙烷基及氧雜環丁基，更佳為丙烯醯氧基。關於聚合 性液晶具有之液晶性，可為熱致性液晶，亦可為易溶液晶，當以有序度對熱致性液晶進行分類時，可為向列液晶亦可為近晶相液晶。 The polymerizable liquid crystal means a compound having a polymerizable group and having liquid crystallinity. The polymerizable group refers to a group participating in a polymerization reaction, and is preferably a photopolymerizable group. Here, the photopolymerizable group refers to a group capable of participating in a polymerization reaction by a living radical or an acid generated from a photopolymerization initiator described later. Examples of the polymerizable group include a vinyl group, a vinyloxy group, a 1-chlorovinyl group, an isopropenyl group, a 4-vinylphenyl group, a propenyloxy group, a methacryloxy group, and an ethylene oxide group. , Oxetanyl and the like. Among them, acryloxy, methacryloxy, ethyleneoxy, ethylene oxide, and oxetanyl are preferred, and acryloxy is more preferred. About Aggregation The liquid crystal of the liquid crystal can be a thermotropic liquid crystal or an easy-to-solve crystal. When the thermotropic liquid crystal is classified by the degree of order, it can be a nematic liquid crystal or a smectic liquid crystal.

作為聚合性液晶之具體例，可舉出於液晶便覧(液晶便覧編集委員會編、丸善(株)平成12年10月30日發行)之「3.8.6網狀物(完全交聯型)」、「6.5.1液晶材料b.聚合性向列液晶材料」所記載之化合物之中具有聚合性基之化合物、日本專利特開2002-267838號公報、日本專利特開2005-208415號公報、日本專利特開2005-208416號公報、日本專利特開2005-208414號公報、日本專利特開2006-052001號公報、日本專利特開2010-270108號公報、日本專利特開2010-31223號公報、日本專利特開2011-6360號公報、日本專利特開2011-207765號公報、日本專利特表2010-522893號公報、日本專利特表2011-207765號公報、美國專利第6,139,771號說明書、美國專利第6,203,724號說明書、美國專利第5,567,349號公報所記載之聚合性液晶。 Specific examples of the polymerizable liquid crystal include "3.8.6 mesh (completely crosslinked)" in liquid crystal stools (edited by the LCD stool editors committee, issued by Maruzen Co., Ltd. on October 30, 2012), Among the compounds described in "6.5.1 Liquid crystal material b. Polymerizable nematic liquid crystal material", compounds having a polymerizable group, Japanese Patent Laid-Open No. 2002-267838, Japanese Patent Laid-Open No. 2005-208415, and Japanese Patent Laid-Open Publication No. 2005-208416, Japanese Patent Laid-Open No. 2005-208414, Japanese Patent Laid-Open No. 2006-052001, Japanese Patent Laid-Open No. 2010-270108, Japanese Patent Laid-Open No. 2010-31223, Japanese Patent Laid-Open Japanese Patent Application Publication No. 2011-6360, Japanese Patent Application Publication No. 2011-207765, Japanese Patent Application Publication No. 2010-522893, Japanese Patent Application Publication No. 2011-207765, US Patent No. 6,139,771, and US Patent No. 6,203,724 Polymerizable liquid crystals described in US Patent No. 5,567,349.

<液晶塗佈層形成用組合物> <Composition for forming a liquid crystal coating layer>

藉由使聚合性液晶聚合而形成之層(液晶塗佈層)通常藉由將含有1個以上之聚合性液晶之組合物(以下，有時稱為液晶塗佈層形成用組合物。)塗佈到基材、配向膜或保護層之上並且使所得到之塗膜中之聚合性液晶聚合來形成。 A layer (liquid crystal coating layer) formed by polymerizing a polymerizable liquid crystal is usually coated with a composition (hereinafter, sometimes referred to as a composition for forming a liquid crystal coating layer) containing one or more polymerizable liquid crystals. It is formed by laying on a substrate, an alignment film, or a protective layer and polymerizing a polymerizable liquid crystal in the obtained coating film.

液晶塗佈層形成用組合物通常包含溶劑，作為溶劑，更佳為能夠溶解聚合性液晶且針對聚合性液晶之聚合反應惰性之溶劑。 The composition for forming a liquid crystal coating layer usually contains a solvent. As the solvent, a solvent capable of dissolving a polymerizable liquid crystal and inert to a polymerization reaction of the polymerizable liquid crystal is more preferable.

關於液晶塗佈層形成用組合物中之溶劑之含量，通常，相對於固形物成分100質量份而較佳為含有10質量份~10000質量份，更佳為50質量份~5000質量份。固形物成分係指自液晶塗佈層形成用組合物除去溶劑後之成分之合計。 The content of the solvent in the composition for forming a liquid crystal coating layer is usually preferably from 10 to 10,000 parts by mass, more preferably from 50 to 5,000 parts by mass, with respect to 100 parts by mass of the solid component. The solid component refers to the total of the components after removing the solvent from the composition for forming a liquid crystal coating layer.

液晶塗佈層形成用組合物之塗佈通常藉由旋轉塗佈法、擠壓法、凹版塗佈法、模塗法、狹縫塗佈法、棒塗法、敷抹器法等塗佈法或柔 版印刷法等印刷法等周知之方法來進行。於塗佈後，通常，於所得到之塗佈膜中所包含之聚合性液晶不聚合之條件下除去溶劑，由此，形成乾燥被膜。作為乾燥方法，可舉出自然乾燥法、通風乾燥法、加熱乾燥及減壓乾燥法。 The liquid crystal coating layer-forming composition is usually applied by a coating method such as a spin coating method, an extrusion method, a gravure coating method, a die coating method, a slit coating method, a bar coating method, or an applicator method. Or soft It is performed by a well-known method such as a printing method such as a printing method. After the coating, the solvent is usually removed under the condition that the polymerizable liquid crystal included in the obtained coating film is not polymerized, thereby forming a dry film. Examples of the drying method include a natural drying method, a ventilation drying method, a heating drying method, and a reduced-pressure drying method.

<基材> <Substrate>

上述基材通常為透明基材。所謂透明基材係指具有能夠透過光尤其是可見光之透明性之基材，透明性係指針對遍及波長380~780nm之光線之透過率為80%以上之特性。作為具體之透明基材，可舉出透光性樹脂基材。作為構成透光性樹脂基材之樹脂，可舉出：聚乙烯、聚丙烯等聚烯烴；降

烯類聚合物等環狀烯烴類樹脂；聚乙烯醇；聚對苯二甲酸乙二酯；聚甲基丙烯酸酯；聚丙烯酸酯；三乙醯纖維素、二乙醯基纖維素、醋酸丙酸纖維素等纖維素酯；聚萘二甲酸乙二酯；聚碳酸酯；聚碸；聚醚碸；聚醚酮；聚苯硫醚及聚苯醚。自入手之容易度或透明性之觀點出發，較佳為聚對苯二甲酸乙二酯、聚甲基丙烯酸酯、纖維素酯、環狀烯烴類樹脂或聚碳酸酯。 The substrate is usually a transparent substrate. The transparent substrate refers to a substrate having transparency that can transmit light, especially visible light. Transparency refers to the characteristic that the transmittance of light with a wavelength of 380 to 780 nm is 80% or more. Specific examples of the transparent substrate include a translucent resin substrate. Examples of the resin constituting the light-transmitting resin substrate include polyolefins such as polyethylene and polypropylene;

Cyclic olefin resins such as olefin polymers; polyvinyl alcohol; polyethylene terephthalate; polymethacrylates; polyacrylates; triethyl cellulose, diethyl cellulose, and propionic acid acetate Cellulose esters such as cellulose; polyethylene naphthalate; polycarbonate; polyfluorene; polyetherfluorene; polyetherketone; polyphenylene sulfide and polyphenylene ether. From the viewpoint of ease of starting or transparency, polyethylene terephthalate, polymethacrylate, cellulose ester, cyclic olefin resin, or polycarbonate is preferred.

<配向膜> <Alignment film>

本發明中之配向膜係指使聚合性液晶沿期望之方向進行液晶配向之具有配向規定力之配向膜。 The alignment film in the present invention refers to an alignment film having a prescribed force for alignment of a liquid crystal in a desired direction by a polymerizable liquid crystal.

作為配向膜，較佳為具有不會因液晶塗佈層形成用組合物之塗佈等而溶解之溶劑耐性，且具有對溶劑之除去或聚合性液晶之配向用之加熱處理之耐熱性者。作為該配向膜，可舉出包含配向性聚合物之配向膜及光配向膜等，能夠將配向性聚合物形成用組合物或光配向膜形成用組合物塗佈於基材而獲得。 The alignment film is preferably one having solvent resistance that does not dissolve due to application of the composition for forming a liquid crystal coating layer, and heat resistance for removal of a solvent or heat treatment for alignment of a polymerizable liquid crystal. Examples of the alignment film include an alignment film containing a aligning polymer, a photo-alignment film, and the like. The alignment polymer-forming composition or the photo-alignment film-forming composition can be obtained by coating the substrate.

作為將配向性聚合物形成用組合物或光配向膜形成用組合物塗佈於基材之方法，可舉出旋轉塗佈法、擠壓法、凹版塗佈法、模塗法、狹縫塗佈法、棒塗法、敷抹器法等塗佈法或柔版印刷法等印刷法等周 知之方法。於藉由後述之輥對輥(Roll to Roll)形式之連續之製造方法製造該光學膜之情形時，於該塗佈方法中，通常採用凹版塗佈法、模塗法或柔版印刷法等印刷法。 Examples of a method for applying the composition for forming an alignment polymer or the composition for forming a photo-alignment film to a substrate include a spin coating method, an extrusion method, a gravure coating method, a die coating method, and a slit coating method. Coating method such as cloth method, bar coating method, applicator method or printing method such as flexographic printing method Know the method. When the optical film is manufactured by a continuous manufacturing method in the form of Roll to Roll described later, in the coating method, a gravure coating method, a die coating method, or a flexographic printing method is generally used. Printing method.

配向膜之厚度通常為10nm~10000nm之範圍，較佳為10nm~1000nm之範圍，更佳為500nm以下，進而較佳為10nm~500nm之範圍。 The thickness of the alignment film is usually in a range of 10 nm to 10000 nm, preferably in a range of 10 nm to 1000 nm, more preferably in a range of 500 nm or less, and even more preferably in a range of 10 nm to 500 nm.

液晶塗佈層形成用組合物亦可包含反應性添加劑。 The composition for forming a liquid crystal coating layer may contain a reactive additive.

作為反應性添加劑，較佳為於其分子內具有碳-碳不飽和鍵及活性氫反應性基之反應性添加劑。再者，此處所謂之「活性氫反應性基」係指對羧基(-COOH)、羥基(-OH)、胺基(-NH2)等具有活性氫之基具有反應性之基，縮水甘油基、

唑啉基、碳二醯亞胺基、氮丙啶基、亞胺基、異氰酸酯基、硫氰酸(thiocyanate)基、順丁烯二酸酐基等為其代表例。反應性添加劑具有之碳-碳不飽和鍵及活性氫反應性基之個數通常分別為1~20個，較佳為分別為1~10個。 The reactive additive is preferably a reactive additive having a carbon-carbon unsaturated bond and an active hydrogen reactive group in its molecule. In addition, the "active hydrogen-reactive group" as used herein refers to a group having a reactive group such as a carboxyl group (-COOH), a hydroxyl group (-OH), an amine group (-NH2), and a glycidyl group. ,

A typical example is an oxazoline group, a carbodiimide group, an aziridinyl group, an imine group, an isocyanate group, a thiocyanate group, a maleic anhydride group, and the like. The number of carbon-carbon unsaturated bonds and active hydrogen reactive groups possessed by the reactive additive is usually 1 to 20, preferably 1 to 10, respectively.

關於液晶塗佈層形成用組合物，較佳為含有1種以上之調平劑。調平劑具有使藉由調整液晶塗佈層形成用組合物之流動性來塗佈液晶塗佈層形成用組合物而得到之塗佈膜更平坦之功能，具體地，可舉出表面活性劑。作為調平劑，較佳為自由將聚丙烯酸酯化合物作為主成分之調平劑及將含有氟原子化合物作為主成分之調平劑構成之組中選擇之至少1種。 The composition for forming a liquid crystal coating layer preferably contains one or more leveling agents. The leveling agent has a function of flattening a coating film obtained by coating the composition for forming a liquid crystal coating layer by adjusting the fluidity of the composition for forming a liquid crystal coating layer. Specifically, a surfactant may be mentioned. . The leveling agent is preferably at least one selected from the group consisting of a leveling agent containing a polyacrylate compound as a main component and a leveling agent containing a fluorine atom-containing compound as a main component.

於液晶塗佈層形成用組合物含有調平劑之情形時，其含量相對於聚合性液晶100質量份而較佳為0.05質量份以上且5質量份以下，更佳為0.05質量份以上且3質量份以下。當調平劑之含量為上述範圍內時，容易使聚合性液晶水平配向，並且，存在所得到之λ/4液晶塗佈層變得更平滑之趨勢。 When the composition for forming a liquid crystal coating layer contains a leveling agent, its content is preferably 0.05 parts by mass or more and 5 parts by mass or less, more preferably 0.05 parts by mass or more and 3 parts by mass based on 100 parts by mass of the polymerizable liquid crystal. Mass parts or less. When the content of the leveling agent is within the above range, the polymerizable liquid crystal is easily aligned horizontally, and the obtained λ / 4 liquid crystal coating layer tends to become smoother.

液晶塗佈層形成用組合物較佳含有1種以上聚合起始劑。聚合起始劑為能夠開始聚合性液晶之聚合反應之化合物，於更低溫之條件下 能夠開始聚合反應之方面，較佳為光聚合起始劑。具體地，可舉出能夠藉由光之作用產生活性自由基或酸之光聚合起始劑，其中，較佳亦為藉由光之作用產生基之光聚合起始劑。 The composition for forming a liquid crystal coating layer preferably contains one or more polymerization initiators. The polymerization initiator is a compound capable of starting the polymerization reaction of the polymerizable liquid crystal, and at a lower temperature In terms of being capable of starting a polymerization reaction, a photopolymerization initiator is preferred. Specifically, a photopolymerization initiator capable of generating an active radical or an acid by the action of light may be mentioned. Among them, a photopolymerization initiator which generates a radical by the action of light is preferred.

於液晶塗佈層形成用組合物含有聚合起始劑之情形時，其含量能夠根據該組合物所含有之聚合性液晶之種類及其量適當調節，相對於聚合性液晶100質量份，較佳為0.1~30質量份，更佳為0.5~10質量份，進而較佳為0.5~8質量份。聚合性起始劑之含量只要為該範圍內，則能夠不擾亂聚合性液晶之配向地聚合。 When the composition for forming a liquid crystal coating layer contains a polymerization initiator, its content can be appropriately adjusted according to the type and amount of the polymerizable liquid crystal contained in the composition, and is preferably more than 100 parts by mass of the polymerizable liquid crystal. It is 0.1 to 30 parts by mass, more preferably 0.5 to 10 parts by mass, and still more preferably 0.5 to 8 parts by mass. As long as the content of the polymerizable initiator is within this range, the polymerizable liquid crystal can be polymerized without disturbing the orientation of the polymerizable liquid crystal.

於液晶塗佈層形成用組合物含有光聚合起始劑之情形時，該組合物亦可進而含有光敏劑。作為光敏劑，可舉出：

酮、9-氧硫

等

酮化合物(例如，2,4-二乙基-9-氧硫

、2-異丙基-9-氧硫

等)；蒽、含有烷氧基之蒽(例如二丁氧基蒽等)等蒽化合物；吩噻

及紅熒烯。 When the composition for forming a liquid crystal coating layer contains a photopolymerization initiator, the composition may further contain a photosensitizer. Examples of the photosensitizer include:

Ketone, 9-oxysulfur

Wait

Ketone compounds (e.g. 2,4-diethyl-9-oxosulfur

, 2-isopropyl-9-oxysulfur

Etc.); anthracene compounds such as anthracene, anthracene containing alkoxy (such as dibutoxyanthracene, etc.); phenothiazine

And rubrene.

於液晶塗佈層形成用組合物含有光聚合起始劑及光敏劑之情形時，能夠更促進該組合物所含有之聚合性液晶之聚合反應。光敏劑之使用量能夠根據光聚合起始劑及聚合性液晶之種類及其量適當調節，相對於聚合性液晶100質量份，較佳為0.1~30質量份，更佳為0.5~10質量份，進而較佳為0.5~8質量份。 When the composition for forming a liquid crystal coating layer contains a photopolymerization initiator and a photosensitizer, the polymerization reaction of the polymerizable liquid crystal contained in the composition can be further promoted. The use amount of the photosensitizer can be appropriately adjusted according to the type and amount of the photopolymerization initiator and the polymerizable liquid crystal, and is preferably 0.1 to 30 parts by mass, and more preferably 0.5 to 10 parts by mass relative to 100 parts by mass of the polymerizable liquid crystal. And more preferably 0.5 to 8 parts by mass.

為了更穩定地使聚合性液晶之聚合反應進行，液晶塗佈層形成用組合物亦可含有適量之阻聚劑，由此，容易控制聚合性液晶之聚合反應之進行程度。 In order to advance the polymerization reaction of the polymerizable liquid crystal more stably, the composition for forming a liquid crystal coating layer may also contain an appropriate amount of a polymerization inhibitor, thereby making it easy to control the degree of progress of the polymerization reaction of the polymerizable liquid crystal.

作為阻聚劑，可舉出：對苯二酚、含有烷氧基之對苯二酚、含有烷氧基之鄰苯二酚(例如，第三丁基鄰苯二酚等)、鄰苯三酚、2,2,6,6-四甲基-1-哌啶氧基自由基等自由基補充劑；苯硫酚類；β-萘胺類以及β-萘酚類。 Examples of the polymerization inhibitor include hydroquinone, alkoxyl-containing hydroquinone, alkoxyl-containing catechol (for example, third butylcatechol, etc.), and catechol Free radical supplements such as phenol, 2,2,6,6-tetramethyl-1-piperidinyloxy radical; thiophenols; β-naphthylamines and β-naphthols.

於液晶塗佈層形成用組合物含有阻聚劑之情形時，其含量能夠根 據聚合性液晶之種類及其量以及光敏劑之使用量等適當調節，相對於聚合性液晶100質量份，較佳為0.1~30質量份，更佳為0.5~10質量份，進而較佳為0.5~8質量份。阻聚劑之含量只要為該範圍內，則能夠不擾亂聚合性液晶之配向地聚合。 When the composition for forming a liquid crystal coating layer contains a polymerization inhibitor, It is appropriately adjusted according to the type and amount of the polymerizable liquid crystal and the use amount of the photosensitizer, etc., and is preferably 0.1 to 30 parts by mass, more preferably 0.5 to 10 parts by mass, and more preferably 100 parts by mass of the polymerizable liquid crystal. 0.5 ~ 8 parts by mass. If the content of the polymerization inhibitor is within this range, the polymerizable liquid crystal can be polymerized without disturbing the orientation of the polymerizable liquid crystal.

聚合性液晶之聚合能夠藉由使具有聚合性基之化合物聚合之周知之方法來進行。具體地，可舉出熱聚合及光聚合，自聚合之容易度之觀點出發，較佳為光聚合。於利用光聚合使聚合性液晶聚合之情形時，較佳為塗佈含有光聚合起始劑之聚合性液晶組合物，使乾燥得到之乾燥被膜中之聚合性液晶為液晶相狀態，之後，於保持該液晶狀態之條件下進行光聚合。 Polymerization of the polymerizable liquid crystal can be performed by a known method of polymerizing a compound having a polymerizable group. Specific examples include thermal polymerization and photopolymerization. From the viewpoint of ease of polymerization, photopolymerization is preferred. In the case of polymerizing a polymerizable liquid crystal by photopolymerization, it is preferable to apply a polymerizable liquid crystal composition containing a photopolymerization initiator, and make the polymerizable liquid crystal in the dried film obtained by drying into a liquid crystal phase state, and then, Photopolymerization is performed while maintaining the liquid crystal state.

關於λ/4延伸相位差膜3之形成，較佳為採用溶液膜法或擠出成型法來製造膜並且使其延伸。λ/4延伸相位差膜3能夠藉由沿機械流程方向延伸之縱單軸延伸；沿與機械流程之方向正交之方向延伸之橫單軸延伸；同時執行縱與橫之雙軸延伸等來製造，較佳為應用傾斜延伸之膜。 Regarding the formation of the λ / 4 stretched retardation film 3, it is preferable to use a solution film method or an extrusion molding method to manufacture and stretch the film. The λ / 4 stretched retardation film 3 can be extended by a longitudinal uniaxial extension extending in the direction of the mechanical flow; a transverse uniaxial extension extending in a direction orthogonal to the direction of the mechanical flow; simultaneously performing a longitudinal and lateral biaxial extension, etc. For manufacturing, it is preferred to use an obliquely stretched film.

於該時間點，於延伸法中使用之材料並無限定，具體地，能夠使用固有雙折射值為正、負或其等之組合之原料來製造。上述「固有雙折射值為正之材料」係指於分子具有單軸性之秩序來配向之情形時光學地示出正之單軸性之材料。例如，於正之原料樹脂之情形時，係指分子之配向方向之折射率較與上述配向方向正交之方向之光之折射率大。 At this point in time, the material used in the extension method is not limited, and specifically, it can be manufactured using a raw material having an inherent birefringence value of positive, negative, or a combination thereof. The above-mentioned "material with a positive intrinsic birefringence value" refers to a material that optically shows positive uniaxiality when the molecules have a uniaxial order to align. For example, in the case of a positive raw resin, it means that the refractive index of the molecular alignment direction is larger than the refractive index of light in a direction orthogonal to the alignment direction.

上述「固有雙折射值為負之材料」係指於分子具有單軸性之秩序來配向之情形時光學地示出負之單軸性之材料。 The above-mentioned "material having a negative intrinsic birefringence value" refers to a material that optically shows a negative uniaxiality when the molecules have a uniaxial order to align.

例如，於負之原料樹脂之情形時，係指分子之配向方向之折射率較與上述配向方向正交之方向之光之折射率小。 For example, in the case of a negative raw resin, it means that the refractive index of the molecular alignment direction is smaller than the refractive index of light in a direction orthogonal to the alignment direction.

具體地，作為於延伸法中使用之材料，可舉出：聚乙烯、聚丙烯 等聚烯烴；降

烯類聚合物等環狀烯烴類樹脂；聚乙烯醇；聚對苯二甲酸乙二酯；聚甲基丙烯酸酯；聚丙烯酸酯；三乙醯纖維素、二乙醯基纖維素、醋酸丙酸纖維素等纖維素酯；聚萘二甲酸乙二酯；聚碳酸酯；聚碸；聚醚碸；聚醚酮；聚苯硫醚及聚苯醚。 Specifically, examples of the material used in the stretching method include polyolefins such as polyethylene and polypropylene;

Cyclic olefin resins such as olefin polymers; polyvinyl alcohol; polyethylene terephthalate; polymethacrylates; polyacrylates; triethyl cellulose, diethyl cellulose, and propionic acid acetate Cellulose esters such as cellulose; polyethylene naphthalate; polycarbonate; polyfluorene; polyetherfluorene; polyetherketone; polyphenylene sulfide and polyphenylene ether.

關於λ/4相位差膜之厚度，於λ/4液晶塗佈層之情形時，通常為10μm以下，較佳為5μm以下，更佳為0.5μm以上5μm以下。於λ/4延伸相位差膜之情形時，通常為100μm以下，較佳為60μm以下，更佳為5μm以上且50μm以下。 Regarding the thickness of the λ / 4 retardation film, in the case of a λ / 4 liquid crystal coating layer, it is usually 10 μm or less, preferably 5 μm or less, and more preferably 0.5 μm or more and 5 μm or less. In the case of a λ / 4 stretched retardation film, it is usually 100 μm or less, preferably 60 μm or less, and more preferably 5 μm or more and 50 μm or less.

(C)第1黏著劑11及第2黏著劑12 (C) First adhesive 11 and second adhesive 12

積層於構成OLED顯示裝置10之OLED面板1之λ/4相位差膜3及偏光膜5能夠藉由黏著劑貼合。關於第1黏著劑11及第2黏著劑12，光學之透明性優異，示出包含適當之凝集性、接著性等之黏著特性為佳，尤其是耐久性優異為佳。作為用於形成該等第1及第2黏著劑之最適合之黏著劑，可舉出丙烯酸類、矽酮類、橡膠類、胺基甲酸酯類、聚酯類或共聚物等，較佳為丙烯酸類共聚物，進而較佳為壓敏性之丙烯酸類黏著劑。亦能夠使用接著劑來代替第2黏著劑。 The λ / 4 retardation film 3 and the polarizing film 5 laminated on the OLED panel 1 constituting the OLED display device 10 can be attached by an adhesive. The first adhesive 11 and the second adhesive 12 are excellent in optical transparency, and it is shown that adhesion characteristics including appropriate cohesiveness, adhesiveness, and the like are preferable, and particularly durability is excellent. Examples of the most suitable adhesive for forming the first and second adhesives include acrylics, silicones, rubbers, urethanes, polyesters, and copolymers. The acrylic copolymer is more preferably a pressure-sensitive acrylic adhesive. It is also possible to use an adhesive instead of the second adhesive.

於黏著劑中，除此之外，也可以混合各種添加劑。作為具體之添加物，可舉出矽烷偶合劑或抗靜電劑。矽烷偶合劑對與玻璃之接著性提高有效，抗靜電劑能夠用於減少或抑制靜電之產生。即使於將第1及第2黏著劑積層於偏光膜之方法中，只要為於該領域中通常使用之方法，則並無特別限制。例如，能夠對偏光膜5之表面塗佈、乾燥、積層黏著劑層形成用塗佈劑。又，可於經矽酮塗佈後之剝離膜上採用與上述相同之塗佈方法形成黏著劑層來製造黏著片材，之後，使用該等卷之壓接裝置進行積層。上述第1及第2黏著劑之厚度能夠根據黏著性進行調整，通常為3μm以上且100μm以下之情形較多，更佳為3μm以上且20μm以下。 In addition to the adhesive, various additives may be mixed. Specific examples of the additive include a silane coupling agent and an antistatic agent. Silane coupling agents are effective in improving adhesion to glass, and antistatic agents can be used to reduce or suppress the generation of static electricity. The method of laminating the first and second adhesives on the polarizing film is not particularly limited as long as it is a method generally used in this field. For example, the surface of the polarizing film 5 can be coated, dried, and a coating agent for forming an adhesive layer can be laminated. In addition, an adhesive layer can be formed on the release film after the silicone coating by the same coating method as described above to produce an adhesive sheet, and then the rolls are laminated using a crimping device. The thickness of the first and second adhesives can be adjusted according to the adhesiveness, and it is usually 3 μm or more and 100 μm or less, and more preferably 3 μm or more and 20 μm or less.

作為第1黏著劑，可舉出國際公開WO2012/173066號所記載之黏著劑。具體地，為如下之黏著劑：含有丙烯酸樹脂及球狀微粒子；丙烯酸樹脂與球狀微粒子之折射率差處於超過0.01未達0.09之範圍；丙烯酸樹脂為重量平均分子量處於50萬~200萬之範圍之高分子量丙烯酸樹脂及重量平均分子量處於1千~15萬之範圍之低分子量丙烯酸樹脂之混合物；關於丙烯酸樹脂，將該丙烯酸樹脂之不揮發量全部重量作為基準而含有5~33重量%之該低分子量丙烯酸樹脂；球狀微粒子之平均粒徑處於5~15μm之範圍；相對於上述丙烯酸樹脂之不揮發量100重量份而含有20~50重量份之球狀微粒子。 Examples of the first adhesive include those described in International Publication No. WO2012 / 173066. Specifically, it is the following adhesive: containing acrylic resin and spherical fine particles; the refractive index difference between acrylic resin and spherical fine particles is in the range of more than 0.01 to 0.09; acrylic resin has a weight average molecular weight in the range of 500,000 to 2 million A mixture of a high molecular weight acrylic resin and a low molecular weight acrylic resin having a weight-average molecular weight in the range of 1,000 to 150,000; for acrylic resins, the total non-volatile content of the acrylic resin is used as a reference and 5 to 33% by weight of the acrylic resin is contained. Low molecular weight acrylic resin; the average particle diameter of the spherical fine particles is in the range of 5 to 15 μm; and the spherical fine particles contain 20 to 50 parts by weight relative to 100 parts by weight of the non-volatile content of the acrylic resin.

又，較佳為如下之上述黏著劑：源自上述高分子量丙烯酸樹脂中之具有碳數量1~14之烷基之(甲基)丙烯酸烷基酯之構造單位之含量為70~99.8重量%，並且，源自具有能夠交聯之極性官能基之(甲基)丙烯酸類化合物之構造單位之含量為0.2~10重量%。 In addition, it is preferable that the above-mentioned adhesive: the content of the structural unit of the (meth) acrylic acid alkyl ester having an alkyl group having 1 to 14 carbon atoms in the high molecular weight acrylic resin is 70 to 99.8% by weight, In addition, the content of the structural unit derived from the (meth) acrylic compound having a polar functional group capable of crosslinking is 0.2 to 10% by weight.

又，較佳為如下之上述黏著劑：源自上述低分子量丙烯酸樹脂中之具有碳數量1~14之烷基之(甲基)丙烯酸烷基酯之構造單位之含量為80~100重量%，並且，源自具有能夠交聯之極性官能基之(甲基)丙烯酸類化合物之構造單位之含量為0~10重量%，進而，光擴散性黏著劑可含有異氰酸酯類交聯劑。 In addition, it is preferable that the above-mentioned adhesive: the content of the structural unit of the alkyl (meth) acrylate having an alkyl group of 1 to 14 in the low molecular weight acrylic resin is 80 to 100% by weight, In addition, the content of the structural unit derived from the (meth) acrylic compound having a polar functional group capable of crosslinking is 0 to 10% by weight, and the light-diffusing adhesive may contain an isocyanate-based crosslinking agent.

(D)支持基板1e (D) Support substrate 1e

支持基板1e包含玻璃基板，但亦可為塑膠基板。為了藉由蒸鍍來貼附成為背面側之反射膜之金屬膜，較佳為玻璃基板。 The support substrate 1e includes a glass substrate, but may be a plastic substrate. In order to attach a metal film to be a reflective film on the back side by vapor deposition, a glass substrate is preferred.

(E)作為陽極電極Ea之金屬膜或金屬片材 (E) Metal film or sheet as anode electrode Ea

關於反射率之不均，較佳為均勻地形成作為陽極電極Ea之金屬膜。關於藉由蒸鍍形成之作為陽極電極Ea之金屬膜之厚度，較佳為500nm以下。 Regarding the unevenness of the reflectance, it is preferable to form the metal film as the anode electrode Ea uniformly. The thickness of the metal film serving as the anode electrode Ea formed by evaporation is preferably 500 nm or less.

藉由上述構成，於附著於偏光膜之OLED顯示裝置中，於偏光膜5 與OLED面板1之間含有λ/4相位差膜3，對由散射造成之OLED顯示裝置10之色相不均勻性進行控制。 With the above configuration, in the OLED display device attached to the polarizing film, the polarizing film 5 A λ / 4 retardation film 3 is included between the OLED panel 1 and the OLED display device 10 to control the non-uniformity of the hue of the OLED display device 10 caused by the scattering.

以上，如所說明般，於本實施形態之OLED顯示裝置中，雖具有反射體，但仍能夠實現均勻之色相。於λ/4相位差膜3及偏光膜5接著於OLED面板1上之OLED顯示裝置中，當外部光進入時，因於面板之表面或內部反射之光而發生散射。反射光之色相由於上述散射而發生變化。又，反射光之偏振光狀態發生變化而反射光不具有均勻之色相，根據位置，而產生色相之差異所示之色相不均性(chrominance non-uniformity，色度不均勻或者稱為不均)。於抗反射之情形時，能夠藉由λ/4相位差膜、偏光膜之附著進行某種程度之抑制。 As described above, in the OLED display device of this embodiment, although it has a reflector, it can still achieve a uniform hue. In the OLED display device in which the λ / 4 retardation film 3 and the polarizing film 5 are attached to the OLED panel 1, when external light enters, scattering occurs due to light reflected on the surface of the panel or internally. The hue of the reflected light changes due to the scattering. In addition, the polarized light state of the reflected light changes and the reflected light does not have a uniform hue. According to the position, a chrominance non-uniformity (chrominance non-uniformity, or unevenness) shown by the difference in hue is generated. . In the case of anti-reflection, it can be suppressed to some extent by the adhesion of a λ / 4 retardation film and a polarizing film.

用於測定色相之裝置為分光色差計，通常之分光色差計使380~780nm之可見光區域中之色相按照CIE(Commission Internationale de l' Eclairage或國際照明委員會)之標準觀測條件，能夠測定XYZ、Yxy、L*a*b*、L*C*h*、△E*_ab、每個波長之反射率等參數。L*為明亮度指數，a*、b*為心理彩度(psychometric chroma)指數。於該等參數之中，作為與由於反射而引起之色相不均勻性有關之數值，選擇針對CIE1931標準觀測者之視感反射率(或物體之三刺激值Y)，應用用於測定上述視感反射率之測定模式來確立新的關係式。關於視感反射率之測定，基於CIE、ISO、ASTM、DIN及JIS等國際標準來測定。 The device used to measure hue is a spectrophotometer. Generally, a spectrophotometer makes the hue in the visible light range of 380 ~ 780nm in accordance with the standard observation conditions of CIE (Commission Internationale de l 'Eclairage or the International Illumination Commission). It can measure XYZ and Yxy. , L * a * b *, L * C * h *, △ E * _ab , reflectance of each wavelength and other parameters. L * is a brightness index, and a * and b * are psychological chroma indexes. Among these parameters, as the value related to the non-uniformity of hue due to reflection, the visual reflectance (or the tristimulus value Y of the object) of the CIE1931 standard observer is selected and used to determine the visual perception Reflectivity measurement mode to establish a new relationship. The measurement of visual reflectance is measured based on international standards such as CIE, ISO, ASTM, DIN, and JIS.

具體而言，於由d/8：i及d/8：e表示之觀測條件下進行測定。又，d/8：i測定條件表示SCI(Specular Component Included)模式，d/8：e測定條件表示SCE(Specular Component Excluded)模式。該等SCI模式及SCE模式能夠根據正反射光成分(Specular Component，鏡面分量)之包含有無而使用不同之方式進行測定。 Specifically, the measurement is performed under observation conditions represented by d / 8: i and d / 8: e. The d / 8: i measurement conditions indicate a SCI (Specular Component Included) mode, and the d / 8: e measurement conditions indicate a SCE (Specular Component Excluded) mode. These SCI mode and SCE mode can be measured in different ways depending on the presence or absence of the specular component (Specular Component).

於正反射成分高之物體之情形時，非常地明亮，因此，人眼不能識別物體之色相。散射反射成分與正反射成分相比暗，因此，人眼容 易識別物體之色相。此係若物體之表面條件發生變化，則物體之色相看起來雖不同，但物體之色相並未變化。正反射量及散射反射量受到物體之表面條件之影響，但若為具有均勻之色相之物體，則整體反射量不發生變化。因此，於SCE模式下，除去正反射成分，僅測定散射反射光，於SCI模式下，測定正反射光及散射反射光。即，SCE模式以觀測者看見物體之色相之觀點評價色相。當利用SCI模式時，抑制由於表面之狀態造成之影響，能夠評價色相。 In the case of an object with a high specular reflection component, it is very bright, so the human eye cannot recognize the hue of the object. The diffuse reflection component is darker than the specular reflection component. Easy to identify the hue of the object. If the surface condition of an object changes, the hue of the object looks different, but the hue of the object does not change. The amount of regular reflection and the amount of scattered reflection are affected by the surface conditions of the object, but if the object has a uniform hue, the overall reflection amount does not change. Therefore, in the SCE mode, the specular reflection component is removed, and only the scattered reflected light is measured. In the SCI mode, the specular reflected light and the scattered reflected light are measured. That is, the SCE mode evaluates the hue from the viewpoint of the hue of the object seen by the observer. When the SCI mode is used, the influence due to the state of the surface is suppressed, and the hue can be evaluated.

以下，為了幫助本發明之理解而提示較佳之實施例，但實施例係對本發明進行例示者。 In the following, preferred embodiments are suggested to help the understanding of the present invention, but the embodiments are illustrative of the present invention.

<實驗例> <Experimental example>

(1)散射反射體之製作 (1) Production of diffuse reflector

首先，準備於玻璃基板之背面蒸鍍包含鋁之金屬膜之反射鏡。再者，亦可代替鋁而蒸鍍銀等金屬來製作金屬膜。玻璃基板為厚度3mm、尺寸為295mm×295mm之四邊形。於實施例中，於玻璃基板上之與形成有金屬膜之面相反側之面上，以25μm以下之厚度塗佈包含散射粒子之黏著劑(光擴散性黏著劑、住友化學公司製)，製作散射反射體(反射體No.1、No.2、No.3)。再者，光擴散性黏著劑使透過光散射並使其擴散。關於該光擴散性黏著劑，以國際公開WO2012/173066號所記載之光擴散性黏著劑(組合物)為參考，能夠使用具有各霧度值之黏著劑。 First, a reflective mirror on which a metal film containing aluminum is vapor-deposited on the back surface of a glass substrate is prepared. Alternatively, a metal film may be produced by vapor-depositing a metal such as silver instead of aluminum. The glass substrate is a quadrangle having a thickness of 3 mm and a size of 295 mm × 295 mm. In the examples, an adhesive containing light scattering particles (light diffusing adhesive, manufactured by Sumitomo Chemical Co., Ltd.) was coated on a glass substrate on the side opposite to the surface on which the metal film was formed to a thickness of 25 μm or less to produce Scattered reflectors (reflectors No.1, No.2, No.3). The light diffusing adhesive scatters and diffuses transmitted light. Regarding this light-diffusing adhesive, the light-diffusing adhesive (composition) described in International Publication No. WO2012 / 173066 is used as a reference, and an adhesive having each haze value can be used.

作為另外之實施例，為了使用無散射之反射體，與上述同樣地，準備於玻璃基板上蒸鍍鋁薄膜而成之反射鏡，於與蒸鍍面相反側之面上，以25μm以下之厚度塗佈不包含散射粒子之通常之黏著劑(住友化學公司製)，製作反射體(反射體No.4、No.8、No.9、No.10、No.11、No.14、No.15)。 As another example, in order to use a non-scattering reflector, a mirror formed by vapor-depositing an aluminum film on a glass substrate is prepared in the same manner as described above, and the thickness is 25 μm or less on the surface opposite to the vapor-deposited surface. A common adhesive (manufactured by Sumitomo Chemical Co., Ltd.) that does not contain scattering particles is applied to form a reflector (reflectors No. 4, No. 8, No. 9, No. 10, No. 11, No. 14, No. 14). 15).

進而，於藉由噴砂處理來使一個面適當地變粗糙後之鈉鈣玻璃之基板之粗糙之面上蒸鍍包含鋁之金屬膜，於與金屬膜蒸鍍面相反側之 面上塗佈不包含散射粒子之通常之黏著劑，製作散射反射體(反射體No.5、No.6、No.7、No.12、No.13)。 Further, a metal film containing aluminum was vapor-deposited on the rough surface of the soda-lime glass substrate after one surface was appropriately roughened by sandblasting, and the metal film containing aluminum was vapor-deposited on the opposite side to the metal film-deposited surface. A general adhesive agent containing no scattering particles is coated on the surface to produce a scattering reflector (reflectors No. 5, No. 6, No. 7, No. 12, No. 13).

對於上述反射體No.1、No.2、No.3之製作中使用之光擴散性黏著劑之霧度值(Haze)進行了測定。於霧度值之測定中，使用了HM-150(村上色彩公司製之霧度計))。霧度值(Haze)=Td/Tt為整體透過光(Tt)之中散射透過光(Td)之比例。再者，該擴散性黏著劑之霧度值按照JIS K 7136：2000「塑膠-透明材料之霧度之求取方法」求取。再者，於全部之實驗中，測定時之溫度為25℃，濕度為60%。 The haze value (Haze) of the light diffusing adhesive used in the production of the reflectors No. 1, No. 2, and No. 3 was measured. For the measurement of the haze value, HM-150 (a haze meter manufactured by Murakami Color Co., Ltd.) was used. Haze value (Haze) = Td / Tt is the ratio of the scattered transmitted light (Td) among the total transmitted light (Tt). In addition, the haze value of this diffusive adhesive is calculated | required according to JISK7136: 2000 "method of obtaining the haze of a plastics-transparent material." In all experiments, the temperature during measurement was 25 ° C and the humidity was 60%.

當總結以上之構成時如以下。 When the above structure is summarized, it is as follows.

(No.1) (No.1)

基板之材料：玻璃 Substrate material: glass

金屬薄膜之材料：鋁 Material of metal film: aluminum

黏著劑之種類：光擴散性黏著劑(*1) Type of adhesive: light-diffusing adhesive (* 1)

黏著劑之霧度值：27% Haze value of adhesive: 27%

(No.2) (No.2)

基板之材料：玻璃 Substrate material: glass

金屬薄膜之材料：鋁 Material of metal film: aluminum

黏著劑之種類：光擴散性黏著劑(*2) Type of adhesive: light diffusing adhesive (* 2)

黏著劑之霧度值：34% Haze value of adhesive: 34%

(No.3) (No.3)

基板之材料：玻璃 Substrate material: glass

金屬薄膜之材料：鋁 Material of metal film: aluminum

黏著劑之種類：光擴散性黏著劑(*3) Type of adhesive: light diffusing adhesive (* 3)

黏著劑之霧度值：52% Haze value of adhesive: 52%

(No.4)、(No.8)、(No.9)、(No.10)、(No.11)、(No.14)、(No.15) (No. 4), (No. 8), (No. 9), (No. 10), (No. 11), (No. 14), (No. 15)

基板之材料：玻璃 Substrate material: glass

金屬薄膜之材料：鋁 Material of metal film: aluminum

黏著劑之種類：通常之黏著劑(*4) Type of Adhesive: Common adhesive (* 4)

黏著劑之霧度值：0.1% Haze value of adhesive: 0.1%

(No.5)、(No.6)、(No.7)、(No.12)、(No.13) (No. 5), (No. 6), (No. 7), (No. 12), (No. 13)

基板之材料：鈉鈣玻璃 Substrate material: Soda-lime glass

金屬片材之材料：鋁 Material of sheet metal: aluminum

黏著劑之種類：通常之黏著劑(*5) Type of Adhesive: Common adhesive (* 5)

黏著劑之霧度值：0.1%。 Haze value of the adhesive: 0.1%.

(2)色相不均勻性評價 (2) Evaluation of hue unevenness

將λ/4相位差膜及偏光膜按照該順序貼附於上述散射反射體上。樣品之編號與各個散射反射體之樣品編號相同。即，散射反射體於表面具備上述黏著劑(設為第1黏著劑)，因此，於其上貼附λ/4相位差膜，於λ/4相位差膜上進而塗佈黏著劑(設為第2黏著劑)，於該黏著劑上貼附偏光膜。再者，塗佈黏著劑之側之構件亦可為與該等情形相反之構件。如以上般，於本例中，具備於OLED面板上貼附λ/4相位差膜之步驟及於λ/4相位差膜上貼附偏光膜之步驟，反射光於λ/4相位差膜中往返，由此，被偏光膜遮蔽，抑制反射光之出射。 The λ / 4 retardation film and the polarizing film were attached to the scattering reflector in this order. The sample number is the same as the sample number of each scattering reflector. That is, the scattering reflector is provided with the above-mentioned adhesive agent (it is set as the first adhesive agent) on the surface, and therefore, a λ / 4 retardation film is pasted thereon, and an adhesive agent is set on the λ / 4 retardation film (it is set as 2nd adhesive agent), A polarizing film is stuck on this adhesive agent. Furthermore, the member on the side to which the adhesive is applied may be a member opposite to these cases. As above, in this example, there are a step of attaching a λ / 4 retardation film on the OLED panel and a step of attaching a polarizing film on the λ / 4 retardation film to reflect light in the λ / 4 retardation film. As a result, it is shielded by the polarizing film, and the emission of reflected light is suppressed.

第2黏著劑為不包含散射粒子之通常之黏著劑(住友化學公司製)，與上述通常之黏著劑(*4)相同。 The second adhesive is a general adhesive (manufactured by Sumitomo Chemical Co., Ltd.) that does not include scattering particles, and is the same as the above-mentioned general adhesive (* 4).

然後，於暗室中於螢光燈之下目視觀察了色相不均性性之視認性。為了得到色相均勻之照片，於暗室中於螢光燈之下使用CCD攝像機(Risa-Color(Hi-Land公司))拍攝照片。於圖4中，示出使用No.1~No.5樣品拍攝了表面之照片之圖。 Then, the visibility of the hue heterogeneity was visually observed under a fluorescent lamp in a dark room. In order to obtain a homogeneous photo, a CCD camera (Risa-Color (Hi-Land)) was used to take the photo in a dark room under a fluorescent lamp. FIG. 4 shows a photograph of a surface taken using samples No. 1 to No. 5.

於No.1樣品之情形時，以目視觀察之色相不均勻性為「好」。於No.2樣品之情形時，以目視觀察之色相不均勻性為「好」。於No.3樣品之情形時，以目視觀察之色相不均勻性為「不差」。於No.4樣品之情形 時，以目視觀察之色相不均勻性為「非常好」。於No.5樣品之情形時，以目視觀察之色相不均勻性為「差」。結果之總結於表1中示出。 In the case of the No. 1 sample, the unevenness of hue visually observed was "good". In the case of the No. 2 sample, the non-uniformity of the hue visually observed was "good". In the case of the No. 3 sample, the non-uniformity of the hue by visual observation was "not bad". In the case of No. 4 sample At this time, the unevenness of hue by visual observation is "very good". In the case of the No. 5 sample, the unevenness of hue by visual observation was "poor". A summary of the results is shown in Table 1.

再者，目視觀察之色相不均勻性之指標係設為如下之基準。 In addition, the index of the unevenness of hue visually observed was set as the following criteria.

「非常好」：目視時完全看不到不均。 "Very good": No unevenness is visible at all.

「好」：目視時看不到不均。 "Good": Unevenness is not visible when looking at it.

「不差」：目視時看到少許不均。 "Not bad": I saw a little unevenness when I saw it.

「差」目視時常常看到不均。 "Poor" often sees unevenness when looking at it.

(3)反射體之關聯參數選定 (3) Selection of parameters related to reflector

對於安裝λ/4相位差膜及偏光膜之前之散射反射體之SCE之模式下之反射率r_SCE、SCI模式下之反射率r_SCI進行了測定。關於該視感反射率，使用分光光度計(CM3700D：konicaminolta公司製)於D65標準光或兩次觀測者之條件下測定。示出各樣品之SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)。將結果總結地示於表1~表3中。 The reflectance r _SCE in the SCE mode of the scattering reflector before the λ / 4 retardation film and the polarizing film were installed, and the reflectance r _SCI in the SCI mode were measured. This visual reflectance was measured using a spectrophotometer (CM3700D: manufactured by Konicaminolta) under the conditions of D65 standard light or two observers. The SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) of each sample is shown. The results are summarized in Tables 1 to 3.

(SCE/SCI測定結果) (SCE / SCI measurement results)

於No.1樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「33%」。 In the case of the No. 1 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "33%".

於No.2樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「44%」。 In the case of the No. 2 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "44%".

於No.3樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「61%」。 In the case of the No. 3 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "61%".

於No.4樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「0%」。 In the case of the No. 4 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "0%".

於No.5樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「88%」。 In the case of the No. 5 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "88%".

於No.6樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「56%」。 In the case of the No. 6 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "56%".

於No.7樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「52%」。 In the case of the No. 7 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "52%".

於No.8樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「0%」。 In the case of the No. 8 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "0%".

於No.9樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「0%」。 In the case of the No. 9 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "0%".

於No.10樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「0%」。 In the case of the No. 10 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "0%".

於No.11樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「0%」。 In the case of the No. 11 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "0%".

於No.12樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「67.87%」。 In the case of the No. 12 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "67.87%".

於No.13樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「70%」。 In the case of the No. 13 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "70%".

於No.14樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「0%」。 In the case of the No. 14 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "0%".

於No.15樣品之情形時，SCE模式反射率/SCI模式反射率(r_SCE/r_SCI)為「0%」。 In the case of the No. 15 sample, the SCE mode reflectance / SCI mode reflectance (r _SCE / r _SCI ) is "0%".

將結果總結地示於表1~表3中。 The results are summarized in Tables 1 to 3.

(4)OLED顯示裝置之關聯參數選定 (4) Selection of related parameters of OLED display device

對於安裝λ/4相位差膜及偏光膜之後之散射反射體之SCE之模式下之反射率、SCI模式下之反射率進行了測定。關於該視感反射率，使用分光光度計(CM3700D：konicaminolta公司製)於D65標準光或兩次觀測者之條件下測定。示出各樣品之SCE/SCI。 The reflectance in the SCE mode and the reflectance in the SCI mode of the scattering reflector after the λ / 4 retardation film and the polarizing film were installed were measured. This visual reflectance was measured using a spectrophotometer (CM3700D: manufactured by Konicaminolta) under the conditions of D65 standard light or two observers. The SCE / SCI of each sample is shown.

(SCE/SCI測定結果) (SCE / SCI measurement results)

於No.1樣品之情形時，SCE模式下之反射率R_SCE為「0.54%」，SCE 模式反射率/SCI模式反射率(R_SCE/R_SCI)為「9%」。 In the case of the No. 1 sample, the reflectance R _SCE in the SCE mode is "0.54%", and the reflectance in the SCE mode / SCI mode (R _SCE / R _SCI ) is "9%".

於No.2樣品之情形時，SCE模式下之反射率R_SCE為「0.66%」，SCE模式反射率/SCI模式反射率(R_SCE/R_SCI)為「11%」。 In the case of the No. 2 sample, the reflectance R _SCE in the SCE mode is “0.66%”, and the reflectance in the SCE mode / SCI mode (R _SCE / R _SCI ) is “11%”.

於No.3樣品之情形時，SCE模式下之反射率R_SCE為「0.90%」，SCE模式反射率/SCI模式反射率(R_SCE/R_SCI)為「15%」。 In the case of the No. 3 sample, the reflectance R _SCE in the SCE mode is “0.90%”, and the reflectance in the SCE mode / SCI mode (R _SCE / R _SCI ) is “15%”.

於No.4樣品之情形時，SCE模式下之反射率R_SCE為「0.03%」，SCE模式反射率/SCI模式反射率(R_SCE/R_SCI)為「1%」。 In the case of the No. 4 sample, the reflectance R _SCE in the SCE mode is "0.03%", and the SCE mode reflectance / SCI mode reflectance (R _SCE / R _SCI ) is "1%".

於No.5樣品之情形時，SCE模式下之反射率R_SCE為「1.34%」，SCE模式反射率/SCI模式反射率(R_SCE/R_SCI)為「22%」。 In the case of the No. 5 sample, the reflectance R _SCE in the SCE mode is “1.34%”, and the reflectance in the SCE mode / SCI mode (R _SCE / R _SCI ) is “22%”.

於No.6樣品之情形時，SCE模式下之反射率R_SCE為「1.0%」，SCE模式反射率/SCI模式反射率(R_SCE/R_SCI)為「17%」。 In the case of the No. 6 sample, the reflectance R _SCE in the SCE mode is “1.0%”, and the reflectance in the SCE mode / SCI mode (R _SCE / R _SCI ) is “17%”.

於No.7樣品之情形時，SCE模式下之反射率R_SCE為「0.89%」，SCE模式反射率/SCI模式反射率(R_SCE/R_SCI)為「15%」。 In the case of the No. 7 sample, the reflectance R _SCE in the SCE mode is “0.89%”, and the reflectance in the SCE mode / SCI mode (R _SCE / R _SCI ) is “15%”.

於No.8樣品之情形時，SCE模式下之反射率R_SCE為「0.03%」，SCE模式反射率/SCI模式反射率(R_SCE/R_SCI)為「1%」。 In the case of the No. 8 sample, the reflectance R _SCE in the SCE mode is “0.03%”, and the reflectance in the SCE mode / SCI mode (R _SCE / R _SCI ) is “1%”.

於No.9樣品之情形時，SCE模式下之反射率R_SCE為「0.03%」，SCE模式反射率/SCI模式反射率(R_SCE/R_SCI)為「1%」。 In the case of the No. 9 sample, the reflectance R _SCE in the SCE mode is "0.03%", and the SCE mode reflectance / SCI mode reflectance (R _SCE / R _SCI ) is "1%".

於No.10樣品之情形時，SCE模式下之反射率R_SCE為「0.03%」，SCE模式反射率/SCI模式反射率(R_SCE/R_SCI)為「1%」。 In the case of the No. 10 sample, the reflectance R _SCE in the SCE mode is "0.03%", and the SCE mode reflectance / SCI mode reflectance (R _SCE / R _SCI ) is "1%".

於No.11樣品之情形時，SCE模式下之反射率R_SCE為「0.03%」，SCE模式反射率/SCI模式反射率(R_SCE/R_SCI)為「1%」。 In the case of the No.11 sample, the reflectance R _SCE in the SCE mode is "0.03%", and the SCE mode reflectance / SCI mode reflectance (R _SCE / R _SCI ) is "1%".

於No.12樣品之情形時，SCE模式下之反射率R_SCE為「1.1%」，SCE模式反射率/SCI模式反射率(R_SCE/R_SCI)為「18.32%」。 In the case of the No.12 sample, the reflectance R _SCE in the SCE mode is “1.1%”, and the reflectance in the SCE mode / SCI mode (R _SCE / R _SCI ) is “18.32%”.

於No.13樣品之情形時，SCE模式下之反射率R_SCE為「1.16%」，SCE模式反射率/SCI模式反射率(R_SCE/R_SCI)為「19.09%」。 In the case of the No.13 sample, the reflectance R _SCE in the SCE mode is "1.16%", and the reflectance in the SCE mode / SCI mode (R _SCE / R _SCI ) is "19.09%".

於No.14樣品之情形時，SCE模式下之反射率R_SCE為「0.03%」，SCE 模式反射率/SCI模式反射率(R_SCE/R_SCI)為「1%」。 In the case of the No.14 sample, the reflectance R _SCE in the SCE mode is "0.03%", and the SCE mode reflectance / SCI mode reflectance (R _SCE / R _SCI ) is "1%".

於No.15樣品之情形時，SCE模式下之反射率R_SCE為「0.03%」，SCE模式反射率/SCI模式反射率(R_SCE/R_SCI)為「1%」。 In the case of the No.15 sample, the reflectance R _SCE in the SCE mode is "0.03%", and the SCE mode reflectance / SCI mode reflectance (R _SCE / R _SCI ) is "1%".

即，作為色相不均勻性，得到「好」或「非常好」者為樣品No.1、No.2、No.4、No.8~No.11、No.14、No.15，得到「不差」者為樣品No.3、No.6、No.7、No.12、No.13。 That is, as the hue non-uniformity, those who obtained "good" or "very good" were samples No. 1, No. 2, No. 4, No. 8 to No. 11, No. 14, No. 15, and " "Not bad" are samples No. 3, No. 6, No. 7, No. 12, No. 13.

對於上述實驗例(實施例、比較例)中使用之各元件之材料進行說明。 The materials of each element used in the above-mentioned experimental examples (examples, comparative examples) will be described.

再者，構成散射反射體之各元件之詳細之材料係如下所示。 The detailed materials of the elements constituting the scattering reflector are shown below.

(1)玻璃基板 (1) Glass substrate

玻璃基板藉由混合並熔融矽砂(SiO₂)、氧化硼(B₂O₃)、氧化鋁(Al₂O₃)來得到。於此，使用了市售之玻璃基板(折射率：1.50)。 The glass substrate is obtained by mixing and melting silica sand (SiO ₂ ), boron oxide (B ₂ O ₃ ), and alumina (Al ₂ O ₃ ). Here, a commercially available glass substrate (refractive index: 1.50) was used.

(2)金屬膜(鋁) (2) Metal film (aluminum)

藉由蒸鍍而形成之金屬膜之膜厚為500nm。形成有金屬膜之玻璃基板之反射率為88.5%。 The film thickness of the metal film formed by evaporation was 500 nm. The reflectance of the glass substrate on which the metal film was formed was 88.5%.

(3)光擴散性黏著劑 (3) Light-diffusing adhesive

按照國際公開WO2012/173066號來製作 Produced in accordance with International Publication No. WO2012 / 173066

(3-1)上述光擴散性黏著劑(*1)之詳細： (3-1) Details of the light-diffusing adhesive (* 1):

關於上述實驗例中使用之材料，具體地，相對於丙烯酸樹脂(折射率：1.42)之不揮發量100重量份而含有23重量份之球狀微粒子(折射率：1.49、平均直徑：5μm)。擴散接著劑之厚度為15μm。 Regarding the material used in the above experimental example, specifically, it contains 23 parts by weight of spherical fine particles (refractive index: 1.49, average diameter: 5 μm) with respect to 100 parts by weight of the nonvolatile content of acrylic resin (refractive index: 1.42). The thickness of the diffusion adhesive was 15 μm.

(3-2)上述光擴散性黏著劑(*2)之詳細： (3-2) Details of the light-diffusing adhesive (* 2):

關於上述實驗例中使用之材料，具體地，相對於丙烯酸樹脂(折射率：1.42)之不揮發量100重量份而含有28重量份之球狀微粒子(折射率：1.49、平均直徑：5μm)。擴散接著劑之厚度為15μm。 Regarding the materials used in the above-mentioned experimental examples, specifically, 28 parts by weight of spherical fine particles (refractive index: 1.49, average diameter: 5 μm) with respect to 100 parts by weight of nonvolatile content of acrylic resin (refractive index: 1.42). The thickness of the diffusion adhesive was 15 μm.

(3-3)上述光擴散性黏著劑(*3)之詳細： (3-3) Details of the light-diffusing adhesive (* 3):

關於上述實驗例中使用之材料，具體地，相對於丙烯酸樹脂(折射率：1.42)之不揮發量100重量份而含有41重量份之球狀微粒子(折射率：1.49、平均直徑：5μm)。擴散接著劑之厚度為15μm。 Regarding the materials used in the above experimental examples, specifically, 41 parts by weight of spherical fine particles (refractive index: 1.49, average diameter: 5 μm) with respect to 100 parts by weight of the nonvolatile content of the acrylic resin (refractive index: 1.42). The thickness of the diffusion adhesive was 15 μm.

(4)通常之黏著劑之詳細： (4) Details of common adhesives:

關於上述實驗例中使用之通常之黏著劑(*4)之材料，具體地，為自光擴散性黏著劑(*1)除去球狀微粒子後之黏著劑，該材料與上述通常之黏著劑(*5)相同。再者，只要相對於上述丙烯酸樹脂之不揮發量100重量份而使球狀微粒子為3重量份以下，則認為具有大致同樣之效果。 Regarding the material of the general adhesive (* 4) used in the above experimental example, specifically, it is an adhesive after removing spherical fine particles from the light-diffusing adhesive (* 1), and the material is the same as the above-mentioned general adhesive ( * 5) The same. In addition, if the spherical fine particles are 3 parts by weight or less with respect to 100 parts by weight of the non-volatile content of the acrylic resin, it is considered that they have substantially the same effect.

(5)鈉鈣玻璃 (5) Soda-lime glass

鈉鈣玻璃基板藉由混合並熔融矽砂(SiO₂)、碳酸鈉(Na₂CO₃)、碳酸鈣CaCO₃)來得到。具體地，折射率為1.52，於一個面進行噴砂處理而蒸鍍500nm金屬膜之情形時，SCE反射率為70.07%。 A soda lime glass substrate is obtained by mixing and melting silica sand (SiO ₂ ), sodium carbonate (Na ₂ CO ₃ ), and calcium carbonate CaCO ₃ . Specifically, the refractive index is 1.52, and when a 500-nm metal film is vapor-deposited on one surface by sandblasting, the SCE reflectance is 70.07%.

(6)λ/4相位差膜 (6) λ / 4 retardation film

再者，使用AXOSCAN(Axometrics)對上述λ/4相位差膜進行測定，結果為550nm情形時之面內相位差值(Ro)為144nm。關於λ/4相位差膜，其波長色散特性(Re(440nm)/Re(550nm))滿足0.8以上且1.0以下。即，波長λ=440nm之情形時之光透過λ/4相位差膜時之實際之相位差，相對於波長λ=550nm之情形時之光透過λ/4相位差膜時之實際之相位差係處於0.8以上且1.0以下之範圍。 In addition, when the λ / 4 retardation film was measured using AXOSCAN (Axometrics), the in-plane retardation value (Ro) was 144 nm in the case of 550 nm. The λ / 4 retardation film has a wavelength dispersion characteristic (Re (440nm) / Re (550nm)) satisfying 0.8 or more and 1.0 or less. That is, the actual phase difference when light at a wavelength of λ = 440nm passes through a λ / 4 retardation film, compared to the actual phase difference when light at a wavelength of λ = 550nm passes through a λ / 4 retardation film. It is in the range of 0.8 or more and 1.0 or less.

(7)偏光膜 (7) Polarizing film

關於上述實驗例中使用之偏光膜，使用了厚度100μm之偏光膜，但亦可使用26μm以上且220μm以下之偏光膜。使用V7100 UV-VIS光譜儀(Jasco公司製)測定上述偏光膜，結果為，單體透過率(Ty)為44.65%，正交b*為-9.19。關於偏光膜，較佳為，單體透過率(Ty)為40%以上且44.95%以下，正交b*為-15以上且0以下。 As the polarizing film used in the above experimental example, a polarizing film having a thickness of 100 μm is used, but a polarizing film having a thickness of 26 μm or more and 220 μm or less may be used. The polarizing film was measured with a V7100 UV-VIS spectrometer (manufactured by Jasco). As a result, the monomer transmittance (Ty) was 44.65% and the orthogonal b * was -9.19. Regarding the polarizing film, the monomer transmittance (Ty) is preferably 40% or more and 44.95% or less, and the orthogonal b * is -15 or more and 0 or less.

(結果與解析) (Results and Analysis)

首先，OLED顯示裝置於具備OLED面板、貼附於OLED面板上之λ/4相位差膜、以及貼附於λ/4相位差膜上之偏光膜之情形時藉由利用λ/4相位差膜之偏振光變換功能及利用偏光膜之光之遮斷功能於原理上將反射率抑制得低。 First, when an OLED display device is provided with an OLED panel, a λ / 4 retardation film attached to the OLED panel, and a polarizing film attached to the λ / 4 retardation film, a λ / 4 retardation film is used. In principle, the polarized light conversion function and the light blocking function using the polarizing film suppress the reflectivity to be low in principle.

接著，於OLED顯示裝置中，較佳為，自偏光膜側於SCE(Specular Component Excluded)模式下測定之反射率為1.2以下。因此，藉由上述實驗，於該反射率為1.2%以下之情形時，以使用實驗樣品No.1等之資料證明之方式改善反射不均之評價。因此，可知利用上述(式1)：R_SCE≦1.2%而反射不均得到改善。 Next, in the OLED display device, it is preferable that the reflectance measured from the polarizing film side in the SCE (Specular Component Excluded) mode is 1.2 or less. Therefore, with the above-mentioned experiment, in the case where the reflectance is 1.2% or less, the evaluation of the reflection unevenness is improved by using the data proof of the test sample No. 1 and the like. Therefore, it can be seen that the above-mentioned (formula 1): R _SCE ≦ 1.2% improves the reflection unevenness.

具體而言，樣品No.1之SCE模式下反射率R_SCE為「0.54%」，樣品No.2之SCE模式下反射率R_SCE為「0.66%」，樣品No.3之SCE模式下反射率R_SCE為「0.90%」，樣品No.4之SCE模式下反射率R_SCE為「0.03%」，樣品No.5之SCE模式下反射率R_SCE為「1.34%」，樣品No.6之SCE模式下反射率R_SCE為「1.0%」，樣品No.7之SCE模式下反射率R_SCE為「0.89%」，樣品No.8之SCE模式下反射率R_SCE為「0.03%」，樣品No.9之SCE模式下反射率R_SCE為「0.03%」，樣品No.10之SCE模式下反射率R_SCE為「0.03%」，樣品No.11之SCE模式下反射率R_SCE為「0.03%」，樣品No.12之SCE模式下反射率R_SCE為「1.1%」，樣品No.13之SCE模式下反射率R_SCE為「1.16%」，樣品No.14之SCE模式下反射率R_SCE為「0.03%」，樣品No.15之SCE模式下反射率R_SCE為「0.03%」。 Specifically, the reflectance R _{SCE in} the SCE mode of the sample No. 1 is "0.54%", the reflectance R _{SCE in} the SCE mode of the sample No. 2 is "0.66%", and the reflectance in the SCE mode of the sample No. 3 R & lt _SCE is "0.90%", R & lt _SCE reflectance SCE mode No.4 of the sample is "0.03%", R & lt _SCE reflectance sample No.5 of the SCE mode is "1.34%", the sample No. 6 of SCE The reflectance R _{SCE in the} mode is "1.0%", the reflectance R _{SCE in} the SCE mode of sample No. 7 is "0.89%", and the reflectance R _{SCE in} the SCE mode of sample No. 8 is "0.03%", sample No. The reflectance R _{SCE in} the SCE mode of .9 is "0.03%", the reflectance R _{SCE in} the SCE mode of sample No. 10 is "0.03%", and the reflectance R _{SCE in} the SCE mode of sample No. 11 is "0.03%"", The reflectance R _{SCE in} the SCE mode of sample No. 12 is" 1.1% ", the reflectance R _{SCE in} the SCE mode of sample No. 13 is" 1.16% ", and the reflectance R _{SCE in} SCE mode of sample No. 14 It is "0.03%", and the reflectance R _{SCE in} the SCE mode of sample No. 15 is "0.03%".

因此，實驗樣品No.1~No.4、實驗樣品No.6~No.15滿足R_SCE≦1.2%。又，實驗樣品No.14之R_SCE為1.16%，當對小數點以下第2位進行四捨五入時，為R_SCE=1.2%。再者，於實施例中，R_SCE之下限為0.03%。 Therefore, experimental samples No. 1 to No. 4 and experimental samples No. 6 to No. 15 satisfy R _SCE ≦ 1.2%. In addition, the R _SCE of experimental sample No. 14 was 1.16%, and when the second digit below the decimal point was rounded, it was R _SCE = 1.2%. Furthermore, in the embodiment, the lower limit of R _SCE is 0.03%.

接著，於(式2)：0%<R_SCE/R_SCI≦20%之情形時，以使用實驗樣品No.1~No.4、No.6~No.15之資料證明之方式改善上述反射不均之評 價。再者，於實驗樣品No.13中，R_SCE/R_SCI=19.09%，因此，當對小數點以下第2位進行四捨五入時，較佳為R_SCE/R_SCI≦19.1%。因此，可知於(式2)之情形時反射不均得到改善。更佳之範圍係如樣品No.1~No.4、No.8~No.11、No.14、No.15所示般為0%<R_SCE/R_SCI<15%。再者，於實驗例中，R_SCE/R_SCI之下限為1%。 Next, in the case of (Equation 2): 0% <R _SCE / R _SCI ≦ 20%, the above reflection is improved by using data proofs of experimental samples No. 1 to No. 4 and No. 6 to No. 15 Uneven evaluation. Furthermore, in experimental sample No. 13, R _SCE / R _SCI = 19.09%. Therefore, when rounding to the second digit below the decimal point, it is preferable that R _SCE / R _SCI ≦ 19.1%. Therefore, it can be seen that in the case of (Expression 2), the reflection unevenness is improved. A better range is 0% <R _SCE / R _SCI <15% as shown in samples No.1 to No.4, No.8 to No.11, No.14, and No.15. Furthermore, in the experimental example, the lower limit of R _SCE / R _SCI is 1%.

同樣地，於(式3)：0%<r_SCE/r_SCI≦70%之情形時，以使用實驗樣品No.1、No.2、No.3、No.6、No.7、No.12、No.13之資料證明之方式改善上述反射不均之評價。因此，可知於(式3)之情形時，反射不均得到改善。更佳之範圍係如實驗樣品No.1、No.2、No.6、No.7所示般為0%<r_SCE/r_SCI<60%。再者，於實驗例中，r_SCE/r_SCI之下限為33%。 Similarly, when (Equation 3): 0% <r _SCE / r _SCI ≦ 70%, experimental samples No.1, No.2, No.3, No.6, No.7, No. 12. The method of data proof of No.13 improves the above evaluation of reflection unevenness. Therefore, it can be seen that in the case of (Expression 3), the reflection unevenness is improved. A better range is 0% <r _SCE / r _SCI <60% as shown in experimental samples No.1, No.2, No.6, and No.7. Furthermore, in the experimental example, the lower limit of r _SCE / r _SCI is 33%.

又，關於OLED面板1，於面板之表面測定之SCE模式下測定之反射率為61%以下(例如，較佳為樣品No.6)。於該情形時，改善上述反射不均之評價。 Regarding the OLED panel 1, the reflectance measured in the SCE mode measured on the surface of the panel is 61% or less (for example, sample No. 6 is preferred). In this case, the evaluation of the reflection unevenness is improved.

又，關於偏光膜，較佳為，單體透過率(Ty)為40%~44.95%，正交b*值為0~-15。 The polarizing film preferably has a monomer transmittance (Ty) of 40% to 44.95% and an orthogonal b * value of 0 to -15.

如上述般，將λ/4相位差膜3及偏光膜5積層於OLED面板1上之OLED顯示裝置中，以滿足自上述OLED顯示裝置之表面於SCE模式下測定之反射率為1.2%以下之方式調整由於散射造成之OLED顯示裝置之色相不均勻性。 As described above, the λ / 4 retardation film 3 and the polarizing film 5 are laminated on the OLED display device on the OLED panel 1 to meet the reflectance of 1.2% or less measured from the surface of the OLED display device in the SCE mode The method adjusts the hue unevenness of the OLED display device due to scattering.

Claims (6)

一種OLED顯示裝置，其特徵在於具備：OLED面板；λ/4相位差膜，其貼附於上述OLED面板上；以及偏光膜，其貼附於上述λ/4相位差膜上；在此狀態下，自偏光膜側於SCE(Specular Component Excluded，排除鏡面正反射光)模式下測定之反射率為1.2%以下，關於上述反射率，拆除上述λ/4相位差膜及上述偏光膜，自上述OLED面板之光出射側之表面於SCE模式下測定之反射率r_SCE與自該表面側於SCI(Specular Component Included，包含鏡面正反射光)模式下測定之反射率r_SCI之比率r_SCE/r_SCI滿足以下之關係式：33%≦r_SCE/r_SCI≦61%。An OLED display device, comprising: an OLED panel; a λ / 4 retardation film attached to the OLED panel; and a polarizing film attached to the λ / 4 retardation film; in this state The self-polarizing film has a reflectance of 1.2% or less measured in SCE (Specular Component Excluded) mode. Regarding the above-mentioned reflectance, the λ / 4 retardation film and the polarizing film are removed. The ratio of the reflectance r _SCE measured in the SCE mode of the surface on the light exit side of the panel to the reflectance r _SCI measured in the SCI (Specular Component Included) mode from the surface side r _SCE / r _SCI The following relationship is satisfied: 33% ≦ r _SCE / r _SCI ≦ 61%. 如請求項1之OLED顯示裝置，其具備：第1黏著劑，其介置於上述OLED面板與上述λ/4相位差膜之間；以及第2黏著劑，其介置於上述λ/4相位差膜與上述偏光膜之間。For example, the OLED display device of claim 1 includes: a first adhesive agent interposed between the OLED panel and the λ / 4 retardation film; and a second adhesive agent interposed between the λ / 4 phase Between the difference film and the above-mentioned polarizing film. 如請求項2之OLED顯示裝置，其中上述第1黏著劑及上述第2黏著劑均包含丙烯酸樹脂。For example, the OLED display device of claim 2, wherein the first adhesive and the second adhesive both include an acrylic resin. 一種OLED顯示裝置，其特徵在於具備：OLED面板；λ/4相位差膜，其貼附於上述OLED面板上；以及偏光膜，其貼附於上述λ/4相位差膜上；且在此狀態下，自偏光膜側於SCE(Specular Component Excluded)模式下測定之反射率R_SCE與自偏光膜側於SCI(Specular Component Included，包含鏡面正反射光)模式下測定之反射率R_SCI之比率R_SCE/R_SCI滿足以下之關係式：0%<R_SCE/R_SCI≦20%，關於上述反射率，拆除上述λ/4相位差膜及上述偏光膜，自上述OLED面板之光出射側之表面於SCE模式下測定之反射率r_SCE與自該表面側於SCI模式下測定之反射率r_SCI之比率r_SCE/r_SCI滿足以下之關係式：33%≦r_SCE/r_SCI≦61%。An OLED display device, comprising: an OLED panel; a λ / 4 retardation film attached to the OLED panel; and a polarizing film attached to the λ / 4 retardation film; and in this state The ratio of the reflectance R _SCE measured in the SCE (Specular Component Excluded) mode from the self-polarizing film side to the reflectance R _SCI measured in the SCI (Specular Component Included) mode with the self-polarizing film side. _SCE / R _SCI satisfies the following relationship: 0% <R _SCE / R _SCI ≦ 20%. Regarding the above-mentioned reflectance, the λ / 4 retardation film and the polarizing film are removed, and the surface from the light emitting side of the OLED panel is removed. reflectance measurement of at SCE mode r ratio _SCE and from the reflectance measurement of the surface side at SCI mode r _SCI of r _SCE / r _SCI satisfy the _{relationship: 33% ≦ r SCE / r} SCI ≦ 61%. 一種OLED顯示裝置之製造方法，其特徵在於，該OLED顯示裝置具備：OLED面板；λ/4相位差膜，其貼附於上述OLED面板上；以及偏光膜，其貼附於上述λ/4相位差膜上；且在此狀態下，自偏光膜側於SCE(Specular Component Excluded)模式下測定之反射率為1.2%以下；上述製造方法具備：於OLED面板上貼附λ/4相位差膜之步驟；以及於上述λ/4相位差膜上貼附偏光膜之步驟；關於上述反射率，拆除上述λ/4相位差膜及上述偏光膜，自上述OLED面板之光出射側之表面於SCE模式下測定之反射率r_SCE與自該表面側於SCI(Specular Component Included)模式下測定之反射率r_SCI之比率r_SCE/r_SCI滿足以下之關係式：33%≦r_SCE/r_SCI≦61%。An OLED display device manufacturing method, characterized in that the OLED display device includes: an OLED panel; a λ / 4 retardation film attached to the OLED panel; and a polarizing film attached to the λ / 4 phase. In this state, the reflectance measured from the polarizing film side in the SCE (Specular Component Excluded) mode is less than 1.2%; the above manufacturing method includes: attaching a λ / 4 retardation film to the OLED panel Steps; and a step of attaching a polarizing film to the λ / 4 retardation film; regarding the reflectance, removing the λ / 4 retardation film and the polarizing film, and putting the surface of the light emitting side of the OLED panel in SCE mode The ratio of the reflectance r _SCE measured below to the reflectance r _SCI measured in the SCI (Specular Component Included) mode from the surface side r _SCE / r _SCI satisfies the following relationship: 33% ≦ r _SCE / r _SCI ≦ 61 %. 一種OLED顯示裝置之製造方法，其特徵在於，該OLED顯示裝置具備：OLED面板；λ/4相位差膜，其貼附於上述OLED面板上；以及偏光膜，其貼附於上述λ/4相位差膜上；且在此狀態下，自偏光膜側於SCE(Specular Component Excluded)模式下測定之反射率為1.2%以下；上述製造方法具備：於偏光膜上貼附λ/4相位差膜而製作圓偏光板之步驟；以及於OLED面板上貼附上述圓偏光板之步驟；關於上述反射率，拆除上述λ/4相位差膜及上述偏光膜，自上述OLED面板之光出射側之表面於SCE模式下測定之反射率r_SCE與自該表面側於SCI(Specular Component Included)模式下測定之反射率r_SCI之比率r_SCE/r_SCI滿足以下之關係式：33%≦r_SCE/r_SCI≦61%。An OLED display device manufacturing method, characterized in that the OLED display device includes: an OLED panel; a λ / 4 retardation film attached to the OLED panel; and a polarizing film attached to the λ / 4 phase. In this state, the reflectance measured from the polarizing film side in SCE (Specular Component Excluded) mode is less than 1.2%; the above manufacturing method includes: attaching a λ / 4 retardation film to the polarizing film, and The steps of making a circular polarizing plate; and the step of attaching the circular polarizing plate to the OLED panel; regarding the reflectance, removing the λ / 4 retardation film and the polarizing film, and removing the surface of the light emitting side of the OLED panel from Reflectance r measured in SCE mode r _SCE and the reflectance r _SCI measured in SCI (Specular Component Included) mode from the surface side r _SCE / r _SCI satisfies the following relationship: 33% ≦ r _SCE / r _SCI ≦ 61%.