JP2017203810A - Light absorption layer contained in color filter for organic electroluminescence display and sheet using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide, at an inexpensive price, a color filter that can perform display at a high luminance while suppressing a display defect due to reflection of external light, and can perform display with good visibility in consideration of the problem to be solved by the present invention.SOLUTION: There is provided an adhesive composition for a light absorption layer in a substrate for forming a color filter for an organic EL display of a white light source type including a transparent substrate and red, green, blue and white colored layers on the transparent substrate, wherein: the light absorption layer has a transmittance in a wavelength region of 400-700 nm within a range of 15-80%; the light absorption layer contains both carbon black pigment and dye as color materials; and the light absorption layer has a haze value of 1.0 or less.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a light absorbing layer contained in a color filter for an organic electroluminescence display, and a sheet using the same.

  The display for organic electroluminescence (hereinafter referred to as “organic EL”) has high visibility due to self-coloring, is an all-solid-state display unlike a liquid crystal display device, has excellent impact resistance, and has a high response speed. It has attracted attention because it has advantages such as little influence by temperature change and a large viewing angle, and research and development and commercialization are progressing as flat panel displays following liquid crystal display devices and plasma displays.

The organic EL display has an organic EL element based on a laminated structure in which an anode, an organic EL layer including a light emitting layer, and a cathode are sequentially laminated. In addition, the organic EL display can perform color display by the color of light from the light emitting layer of the organic EL element. In order to perform color display with better color, A combination of color filters is also widely used.
In such an organic EL display, since display is performed by driving an organic EL element, it is required to perform display with high luminance with lower power consumption.

Therefore, in recent years, an organic EL display having pixels of four colors in which a white colored layer is added to a colored layer of three colors of red, green, and blue has been proposed. (Patent Document 1)
Further, in such an organic EL display, a transparent part and a colored part having the above three colored layers and a pattern part corresponding to the white colored layer are provided as a color filter, and the transparent part that transmits white light as it is is provided. It has been proposed to use one having a white part having a layer.

  Incidentally, one of the anode and the cathode of the organic EL element in the organic EL display is usually composed of a metal electrode. Therefore, in an organic EL display device, when used outdoors, there is a problem in that display defects such as a decrease in contrast occur due to reflection of external light by a metal electrode layer or the like of the organic EL element. is there.

In order to solve the above-described problem, for example, a technique for preventing external light reflection by providing a circularly polarizing plate on the observer side of the organic EL display has been proposed.
However, when a circularly polarizing plate is used, display defects due to reflection of external light can be suppressed, but light emission from the organic EL element is hindered by the circularly polarizing plate, and compared with the luminance in the case of using no circularly polarizing plate, There is a problem that only a luminance of 50% or less can be obtained.

  Display defects due to external light reflection have been found to be mainly caused by external light reflection in the white colored layer of the organic EL display, and light absorption that can absorb external light in the white colored layer of the color filter. By forming a layer and adjusting the transmission spectrum of the white colored layer and attenuating the intensity of green light, which has high visibility, from the intensity of other light, it suppresses display defects due to reflection of external light and increases brightness. There has been proposed a method capable of performing display (Patent Document 2).

  However, the light-absorbing layer according to the present proposal is composed of a dispersion of a carbon black pigment and a phthalocyanine blue pigment as a coloring material, and in particular, high haze and visibility due to coarse particles contained in the phthalocyanine blue pigment. There is a problem that deterioration, that is, clear appearance is impaired. In the case of a light absorption layer containing a phthalocyanine color material, the transmittance of the visible light wavelength region is reduced overall by increasing the concentration of the phthalocyanine color material in the light absorption layer. There is a problem that the extraction efficiency is significantly reduced.

Special table 2007-516564 gazette JP 2014-74880 A

  As described above, in the conventional white light emitting type organic EL displays, there has been no reduction in external light reflection and prevention of reduction in display luminance and satisfactory display quality. It was done. The present invention has been made in view of this problem. A color filter that can perform display with high luminance while suppressing display defects due to reflection of external light and that can display with good visibility is inexpensive. Its main purpose is to provide

  As a result of intensive studies to solve the above-mentioned problems, the inventors of the present invention have a wavelength region of 400 nm to 700 nm in a colored portion region having a transparent substrate and a plurality of colored layers formed on the transparent substrate. Use of a color filter substrate for an organic EL display, wherein a light absorption layer having a transmittance of 15 to 80% is laminated and a haze value of the light absorption layer is 1.0 or less As a result, the present inventors have found that the above-mentioned problems can be solved and completed the present invention.

That is, the present invention relates to the following (1) to (12).
(1) In a white light source type organic EL display color filter forming substrate having a transparent substrate and a red, green, blue, and white colored layer on the transparent substrate, in a region between the light emitting layer and the outer layer portion, A light absorption layer having a transmittance in the range of 15 to 80% in a wavelength region of 400 nm to 700 nm, wherein the light absorption layer contains a carbon black pigment and a dye as a colorant, and the light An adhesive composition for a light absorption layer, wherein the haze value of the absorption layer is 1.0 or less.
(2) The pressure-sensitive adhesive composition for a light absorption layer according to (1), wherein the carbon black pigment contained in the light absorption layer has an average particle diameter of 100 nm or less.
(3) The color material contained in the light absorption layer is characterized in that the increase in transmittance is 5% or less in a carbon arc light resistance test for 100 hours at a black panel temperature of 63 ° C. and an irradiation illuminance of 500 W / m ^2. (1) The adhesive composition for light absorption layers as described in any one of (2).
(4) The transmittance in the wavelength region of 400 to 430 nm is 150 to 60%, the transmittance in the wavelength region of 530 to 580 nm is 40 to 60%, and the transmittance in the wavelength region of 630 to 660 nm is 35 to 60%. The pressure-sensitive adhesive composition for a light-absorbing layer according to any one of (1) to (3), which satisfies at least two of the three transmittance requirements.
(5) The pressure-sensitive adhesive composition for a light absorption layer according to any one of (1) to (4), wherein a cumulative 50% particle size of the carbon black is 30 to 60 nm.
(6) The pressure-sensitive adhesive composition for a light-absorbing layer according to any one of (1) to (5), having a haze value of 0.5 or less.
(7) The pressure-sensitive adhesive composition for a light-absorbing layer according to any one of (1) to (6), wherein the dye is an anthraquinone dye or an anthrapyridone dye.
(8) The pressure-sensitive adhesive composition for a light-absorbing layer according to any one of (1) to (7), further comprising an acrylic resin copolymer.
(9) The pressure-sensitive adhesive composition for a light absorbing layer according to (8), wherein the acrylic resin copolymer has a weight average molecular weight of 800,000 to 2,000,000.
(10) Hardened | cured material obtained by hardening | curing the adhesive composition for light absorption layers as described in any one of (1)-(9).
(11) A sheet comprising a light absorption layer, comprising the pressure-sensitive adhesive composition for a light absorption layer according to any one of (1) to (9).
(12) An organic EL display device comprising the cured product according to (10) or the sheet according to (11) as a light absorption layer.

  By using the color filter for an organic EL display including the light absorption layer of the present invention, it is possible to perform display with high luminance while suppressing display defects due to reflection of external light, and further display with good visibility. The color filter can be provided at low cost.

It is a schematic sectional drawing which shows the 1st example of the color filter for organic EL displays of this invention. It is the schematic which shows the laminated structure of an organic electroluminescent layer. It is a schematic sectional drawing which shows the modification of the 1st example of the color filter for organic EL displays of this invention. It is a schematic sectional drawing which shows the light absorption layer which provided the transparent substrate. It is the schematic which shows the concept of a particle size distribution. It is a schematic sectional drawing which shows the 2nd example of the color filter for organic EL displays of this invention. It is a schematic sectional drawing which shows the modification of the 2nd example of the color filter for organic EL displays of this invention. It is a schematic sectional drawing which shows the 3rd example of the color filter for organic EL displays of this invention. It is the schematic which shows the manufacturing process of the 1st example of the color filter for organic EL displays of this invention.

  Hereinafter, the color filter for organic EL displays and the light absorption layer of the present invention will be described.

  The color filter for organic EL displays of the present invention is composed of a substrate, a light emitting layer, a colored layer, a light absorbing layer, and an outer layer portion as shown in the schematic cross-sectional view of FIG.

Next, an organic EL display color filter and a light absorption layer will be described with reference to the schematic cross-sectional view of FIG.
<Substrate 1>
The base material 1 used for the color filter for organic EL displays of the present invention supports a light emitting layer described later, and may be transparent or non-transparent.
As the substrate, for example, a metal such as aluminum, a rigid material such as quartz glass, Pyrex (registered trademark) glass, or synthetic quartz, or a flexible material having flexibility such as a resin film or an optical resin plate is used. I can do it. Moreover, you may use what formed the barrier layer in the resin film. Here, the base material does not need to be transparent, and has a role of reflecting external light when metals are used.
When using a transparent material, the light transmittance of the transparent substrate is such that when the color filter for an organic EL display device of the present invention is used in an organic EL display device, light emitted from the light emitting layer is transmitted. Although it is not particularly limited as long as it can be displayed, the transmittance in the visible light region is preferably 80% or more, more preferably 90% or more, and particularly preferably 99% or more. preferable. The transmittance can be measured, for example, according to JIS K7361-1.

<Light emitting layer 2>
The light emitting layer 2 can be laminated on one side of the substrate 1. As the light emitting layer 2 used in the color filter for an organic EL display of the present invention, at least the light emitting layer corresponding to the white colored layer emits white light. Specifically, the light-emitting layer may be a white light-emitting layer that emits white light, and may be a light-emitting layer that is configured by a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer that emit three primary colors. The light emitting material used for the light emitting layer may be any material that emits fluorescence or phosphorescence, and examples thereof include a dye material, a metal complex material, and a polymer material.
Although not shown in FIG. 1, electrode layers such as an anode and a cathode are usually formed as adjacent layers of the light emitting layer 2. As the conductive material, a metal material is usually used, but an organic material or an inorganic compound may be used, and a plurality of materials may be mixed and used. Here, whether or not the electrode layers of the anode and the cathode have transparency can be appropriately selected according to the light extraction surface. A conductive material having a high work function is preferably used for the anode so that holes can be easily injected, and a conductive material having a low work function is preferably used for the cathode so that electrons can be easily injected. Examples of the conductive material include In—Zn—O (IZO), In—Sn—O (ITO), Zn—O—Al, and Zn—Sn—O when transparency is required. In the case where transparency is not required, metals can be used, specifically, Au, Ta, W, Pt, Ni, Al, Pd, Cr, Al alloy, Ni alloy, Cr alloy, etc. it can. As a method for forming the electrode layer, a general electrode film forming method can be used, and a sputtering method, an ion plating method, a vacuum deposition method, a CVD method, a printing method, and the like can be raised. As a method for patterning the electrode layer, a photolithography method can be used.
An organic EL layer can be used instead of the light emitting layer 2. The organic EL layer mentioned here is composed of a plurality of organic layers including at least a light emitting layer. Specific examples of the organic layer other than the light-emitting layer include a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer as shown in FIG.
The organic EL layer can adopt a general configuration, such as a hole injection layer / light emitting layer, a hole injection layer / light emitting layer / electron injection layer, a hole injection layer / hole blocking layer / light emitting layer, a hole. Examples of the laminated structure include an injection layer / hole blocking layer / light emitting layer / electron injection layer, hole injection layer / light emitting layer / electron transport layer, and the like.

(I) Light emitting layer As the light emitting layer used in this embodiment, a light emitting layer corresponding to at least a white pixel portion emits white light. Specifically, it may be a white light-emitting layer that emits white light, or may be a light-emitting layer that is composed of a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer that emit three primary colors, respectively, and that emits white light.
In addition, the light emitting layer corresponding to the colored subpixel may emit white light as described above, or may be a light emitting layer that emits light of a color corresponding to the color of each colored subpixel.
About the kind of light emitting layer, it can select suitably according to the use etc. of an organic electroluminescence display.

  The light emitting material used for the light emitting layer may be any material that emits fluorescence or phosphorescence, and examples thereof include dye materials, metal complex materials, and polymer materials.

  Examples of dye-based materials include cyclopentadiene derivatives, tetraphenylbutadiene derivatives, triphenylamine derivatives, oxadiazole derivatives, pyrazoloquinoline derivatives, distyrylbenzene derivatives, distyrylarylene derivatives, silole derivatives, thiophene ring compounds, pyridine Examples thereof include a ring compound, a perinone derivative, a perylene derivative, an oligothiophene derivative, a coumarin derivative, an oxadiazole dimer, and a pyrazoline dimer.

  Examples of the metal complex material include an aluminum quinolinol complex, a benzoquinolinol beryllium complex, a benzoxazole zinc complex, a benzothiazole zinc complex, an azomethyl zinc complex, a porphyrin zinc complex, a europium complex, or a central metal such as Al, Zn, Be, etc. Alternatively, a metal complex having a rare earth metal such as Tb, Eu, or Dy and having a oxadiazole, thiadiazole, phenylpyridine, phenylbenzimidazole, quinoline structure, or the like as a ligand can be given. Specifically, tris (8-quinolinolato) aluminum complex (Alq3) can be used.

  Examples of the polymer material include polyparaphenylene vinylene derivatives, polythiophene derivatives, polyparaphenylene derivatives, polysilane derivatives, polyacetylene derivatives, polyvinylcarbazole, polyfluorenone derivatives, polyfluorene derivatives, polyquinoxaline derivatives, polydialkylfluorene derivatives, and Examples thereof include copolymers thereof. Moreover, what polymerized said pigment-type material and metal complex-type material as a polymeric material can also be used.

  As the phosphorescent material, for example, an iridium complex, a platinum complex, or a metal complex having a heavy metal having a large spin-orbit interaction such as Ru, Rh, Pd, Os, Ir, Pt, or Au as a central metal is used. Can do. Specific examples include iridium complexes having platinum pyridine, thienyl pyridine and the like as ligands, platinum porphyrin derivatives, and the like.

  These luminescent materials may be used alone or in combination of two or more.

  Further, a dopant that emits fluorescence or phosphorescence may be added to the light emitting material for the purpose of improving the light emission efficiency and changing the light emission wavelength. Examples of such dopants include perylene derivatives, coumarin derivatives, rubrene derivatives, quinacridone derivatives, squalium derivatives, porphyrin derivatives, styryl dyes, tetracene derivatives, pyrazoline derivatives, decacyclene, phenoxazone, quinoxaline derivatives, carbazole derivatives, and fluorene derivatives. Can be mentioned.

  The thickness of the light-emitting layer is not particularly limited as long as it can provide a function of emitting light by providing a recombination field of electrons and holes, and may be, for example, about 10 nm to 500 nm. it can.

  The method for forming the light emitting layer may be a wet process in which a light emitting layer forming coating solution in which the above light emitting material or the like is dissolved or dispersed in a solvent may be applied, or may be a dry process such as a vacuum deposition method. Good. Among these, a wet process is preferable from the viewpoint of efficiency and cost.

  Examples of the application method of the light emitting layer forming coating liquid include an inkjet method, a spin coating method, a casting method, a dipping method, a bar coating method, a blade coating method, a roll coating method, a spray coating method, a gravure printing method, and screen printing. Method, flexographic printing method, offset printing method and the like.

(Ii) Hole injection layer and hole transport layer In this embodiment, the hole injection layer and the hole transport layer may be integrally formed as a hole injection transport layer between the light emitting layer and the anode. .
The hole injection transport layer may be only a hole injection layer having a hole injection function, or may be only a hole transport layer having a hole transport function. May be laminated, or may have both a hole injection function and a hole transport function.

  The material used for the hole injecting and transporting layer is not particularly limited as long as it is a material that can stabilize injection and transportation of holes to the light emitting layer, and is exemplified in the light emitting material of the light emitting layer. In addition to compounds, phenylamine, starburst amine, phthalocyanine, vanadium oxide, molybdenum oxide, ruthenium oxide, aluminum oxide, titanium oxide and other oxides, amorphous carbon, polyaniline, polythiophene, polyphenylene vinylene and their derivatives The conductive polymer can be used. Specifically, bis (N- (1-naphthyl) -N-phenyl) benzidine (α-NPD), 4,4,4-tris (3-methylphenylphenylamino) triphenylamine (MTDATA), poly-3 , 4 ethylenedioxythiophene-polystyrene sulfonic acid (PEDOT-PSS), polyvinylcarbazole and the like.

  The thickness of the hole injecting and transporting layer is not particularly limited as long as the hole injecting function and the hole transporting function are sufficiently exhibited. Specifically, the thickness is in the range of 0.5 nm to 1000 nm, particularly 10 nm to It is preferable to be in the range of 500 nm.

  The formation method of the hole injection transport layer may be a wet process in which a coating liquid for forming a hole injection transport layer in which the above-described materials or the like are dissolved or dispersed in a solvent may be applied. It may be a process and is appropriately selected according to the type of material.

(Iii) Electron injection layer and electron transport layer In this aspect, the electron injection layer and the electron transport layer may be integrally formed as an electron injection transport layer between the light emitting layer and the cathode.
The electron injecting and transporting layer may be only an electron injecting layer having an electron injecting function, or may be only an electron transporting layer having an electron transporting function, and is a laminate of an electron injecting layer and an electron transporting layer. It may have both an electron injection function and an electron transport function.

  The material used for the electron injection layer is not particularly limited as long as it can stabilize the injection of electrons into the light emitting layer. In addition to the compounds exemplified as the light emitting material for the light emitting layer, aluminum may be used. Alkali metals such as lithium alloys, strontium, calcium, lithium, cesium, lithium fluoride, magnesium fluoride, strontium fluoride, calcium fluoride, barium fluoride, cesium fluoride, magnesium oxide, strontium oxide, sodium polystyrene sulfonate, and Alkaline earth metal metals, alloys, compounds, organic complexes, and the like can be used.

  Alternatively, a metal doped layer in which an alkali metal or an alkaline earth metal is doped on an electron transporting organic material may be formed, and this may be used as an electron injection layer. Examples of the electron-transporting organic material include bathocuproine, bathophenanthroline, and phenanthroline derivatives. Examples of the metal to be doped include Li, Cs, Ba, and Sr.

  The material used for the electron transport layer is not particularly limited as long as it can transport electrons injected from the cathode to the light emitting layer. For example, bathocuproin, bathophenanthroline, phenanthroline derivative, triazole derivative Oxadiazole derivatives, tris (8-quinolinolato) aluminum complex (Alq3) derivatives, and the like.

  The thickness of the electron injection / transport layer is not particularly limited as long as the electron injection function and the electron transport function are sufficiently exhibited.

  The method for forming the electron injecting and transporting layer may be a wet process in which a coating liquid for forming an electron injecting and transporting layer in which the above-described materials or the like are dissolved or dispersed in a solvent may be applied, or by a dry process such as a vacuum evaporation method. There may be, and it chooses suitably according to the kind etc. of material.

<Colored layer 3>
As described above, the colored layer 3 includes the red colored layer 3R, the green colored layer 3G, the blue colored layer 3B, and the white colored layer 3W, and is located in the pixel region. The colored layers are arranged in a pattern. However, the pattern arrangement is not limited to that shown in the figure, and may be a known arrangement such as a stripe type, a mosaic type, a triangle type, or a four-pixel arrangement type. The area (pixel aperture ratio) of each colored layer can be arbitrarily set.
The thickness of the colored layer 3 is usually set to about 1 to 5 μm.

Such a colored layer can be formed using a method for forming a colored layer in a general color filter, for example, a photolithography method, an inkjet method, a printing method, an electrodeposition method, or the like. In addition, as a forming material such as a binder resin and a colorant for the colored layer, a material generally used for a color filter can be used. For example, the coloring material used in the red coloring layer includes diketopyrrolopyrrole pigments, anthraquinone pigments, azo pigments, quinacridone pigments, isoindolinone pigments, perylene pigments, lake pigments, anthracene pigments, and the like. These pigments may be used alone or in admixture of two or more. Examples of the colorant used in the green colored layer include halogenated phthalocyanine pigments, azo pigments, isoindolinone pigments, triphenylmethane basic dyes, and the like. Or you may use by mixing 2 or more types. Further, the coloring materials used in the blue colored layer include phthalocyanine pigments, dioxazine pigments, anthraquinone pigments, indanthrene pigments, indophenol pigments, cyanine pigments, triphenylmethane basic dyes, xanthenes. Dyes etc. are mentioned, You may use these pigments or dyes individually or in mixture of 2 or more types. Furthermore, the white colored layer may be composed of a binder resin used for the red colored layer, the green colored layer, and the blue colored layer, and for the purpose of adjusting the white chromaticity, a colorant such as the above-described one in the binder resin. It may contain a coloring material used for the red, green, and blue colored layers.
As the binder resin, for example, a photosensitive resin having a reactive vinyl group such as acrylate, methacrylate, polyvinyl cinnamate, and cyclized rubber can be used.
In the forming material, a photopolymerization initiator may be added to the photosensitive resin composition for forming a colored portion containing a colorant and a photosensitive resin, and further a sensitizer and a coating property improver as necessary. Further, development improvers, crosslinking agents, polymerization inhibitors, plasticizers, flame retardants, and the like can be added.
In the white colored layer, a black matrix to be described later, a resin composition that forms the colored layer of each color described above, or a resin having a composition excluding the coloring material can be used, and the white colored layer is formed by the same method as the method for forming the colored layer. can do. In addition, as shown in FIG. 3, the light absorption layer and the white colored layer can be made of the same material.

<Transparent substrate 8>
As shown in FIG. 4, a transparent substrate 8 can be disposed adjacent to the light absorption layer 4. In FIG. 4, the transparent substrate 8 faces the colored layer side of the organic EL display device, and the light absorption layer 4 faces the outer peripheral side. The transparent substrate 8 is not particularly limited as long as it is a substrate transparent to visible light, and the same transparent substrate used for a general color filter can be used. Specifically, a rigid material such as quartz glass, pyrex glass or synthetic quartz, or a transparent flexible material having flexibility such as a transparent resin film or an optical resin plate can be used.
The light transmittance of the transparent substrate should be such that when the color filter for an organic EL display device of the present invention is used in an organic EL display device, the light emitted from the light emitting layer can be transmitted and display can be performed. Although not particularly limited, the transmittance in the visible light region is preferably 80% or more, more preferably 90% or more, and particularly preferably 99% or more. The transmittance of the transparent substrate can be measured, for example, according to JIS K7361-1.
In FIG. 4, the configuration in which the transparent substrate 8 is disposed on the colored layer side has been described. However, it is also possible to apply a configuration in which the transparent substrate is disposed on the outer peripheral portion side and the light absorption layer 4 is disposed on the colored layer side. is there.

<Light absorption layer 4>
The light absorption layer 4 is a layer necessary to display with high luminance while sufficiently reducing reflection of external light, eliminating reflection unevenness and achieving high color purity of display, and as described above, transmittance Is 15 to 80%, preferably 35 to 70%. On the other hand, it is a layer formed with a haze value of 1.0 or less, preferably 0.5 or less. When the transmittance of the light absorption layer is less than 15%, the use efficiency of light from the light-emitting element when the color filter substrate is used for a display device is low, and the luminance is insufficient, while the transmittance is 80%. Exceeding this causes insufficient external light reflection capability, which is the original function of the light absorption layer, resulting in reflection unevenness and a decrease in display color purity. On the other hand, if the haze value exceeds 1.0, the screen appears white due to irregular reflection of light, resulting in poor visibility and poor display quality.

The light absorption layer is comprised from the coloring material and the adhesive resin composition containing this.
Next, the coloring material contained in the light absorption layer will be described.

  Properties required for the colorant contained in the light absorption layer include <1> spectral characteristics (matching degree with respect to a target spectral waveform), <2> low haze value, and <3> high durability. . With respect to such required characteristics, the above-mentioned problems can be solved by selecting a pigment-based colorant and a dye.

As described above, the spectral characteristics required of the colorant contained in the light absorption layer are such that the transmittance is in the range of 15 to 80%, preferably 35 to 70% in the wavelength region of 400 nm to 700 nm. Since sunlight, which is external light, has light of each wavelength, it has absorption in the entire visible light region, so that when the external light is reflected, it is absorbed by the light absorption layer in the entire visible light region, , It is possible to suppress the reflected light caused by the external light from reaching the viewer. And in order to suppress the influence which this external light reflection has on a viewer, and to improve the visibility by a viewer, it has to have the transmittance | permeability mentioned above, and the light absorption layer of a preferable range becomes suitable. And in order to suppress the transmittance | permeability of 400-700 nm which is this visible light region, use of a black coloring agent is suitable, and the transmittance | permeability in 400-700 nm is used by using pigment particles, such as carbon black mentioned later. Can be effectively suppressed. By using a light absorption layer having such transmittance, external reflected light that enters from the front surface and is reflected and emitted from internal electrodes and wiring can be reduced. It is possible to increase the amount of transmitted light particularly during display as compared with an organic EL display device using a circularly polarizing plate by reducing light reduction. That is, even if the transmittance is 80%, which is the upper limit, if it is reflected light, the light reflected and reflected after entering the light absorbing layer will be transmitted again through the light absorbing layer. The transmittance can be obtained, and the influence of reflected light can be greatly reduced.
In the wavelength region of 400 nm to 500 nm, the transmittance is preferably 10 to 70%, and more preferably 15 to 60%. In particular, the transmittance in the wavelength region of 400 to 430 nm (particularly 400 nm) is 10 to 70%, more preferably 15 to 60%. This is because the influence of light in such a wavelength region on the viewer (the effect of light emission that is easy to perceive, the action of appearing colored, etc.) is large. This is because it is effective to improve the light absorption effect.
Furthermore, in the wavelength region of 500 nm to 650 nm, the transmittance is preferably 35 to 65%. In particular, the transmittance in the wavelength region of 530 to 580 nm (particularly 550 nm) is preferably 35 to 65%, more preferably 40 to 60%. This is because the influence of light in such a wavelength region on the viewer (the effect of light emission that is easy to perceive, the action of appearing colored, etc.) is large. This is because it is effective to improve the light absorption effect.
In addition, in the wavelength region of 630 nm to 700 nm, the transmittance is preferably 40 to 70%. In particular, the transmittance in the wavelength region of 630 to 660 nm (particularly 650 nm) is preferably 30 to 70%, more preferably 35 to 60%. This is because the influence of light in such a wavelength region on the viewer (the effect of light emission that is easy to perceive, the action of appearing colored, etc.) is large. This is because it is effective to improve the light absorption effect.
Examples of the colorant that matches such a spectral waveform include a black colorant, a yellow colorant, a red colorant, a purple colorant, a blue colorant, a green colorant, and the like. By using the materials together and adjusting the transmission characteristics, it is possible to match the target spectral waveform.

Here, as the transmittance of each wavelength region, the transmittance A is the transmittance in the wavelength region of 400 to 430 nm, the transmittance B is the transmittance in the wavelength region of 530 to 580 nm, and the transmittance C is the wavelength region of 630 to 660 nm. Transmittance. The requirement A is that the transmittance A is 10 to 70%, the requirement B is that the transmittance B is 40 to 60%, and the requirement C is that the transmittance C is 30 to 70%. In the present invention, the visibility can be improved by satisfying two or more requirements among the requirements A to C, and the visibility can be particularly improved by satisfying the requirements in all of the requirements A to C. it can.
And when the requirement A1 is that the transmittance A is 15 to 60%, the requirement B2 is that the transmittance B is 40 to 60%, and the requirement C2 is that the transmittance C is 35 to 60% Visibility can be improved by satisfying two or more requirements among requirements A2 to C2, and visibility can be particularly improved by satisfying the requirements in all of requirements A2 to C2.

The transmittance A ′ is the transmittance in the wavelength region of 400 nm, the transmittance B ′ is the transmittance in the wavelength region of 550 nm, and the transmittance C ′ is the transmittance in the wavelength region of 650 nm. And, it is required that the transmittance A ′ is 10 to 70%, the requirement A ′, the transmittance B ′ is 40 to 60%, the requirement B ′, and the transmittance C ′ is 30 to 70%. Let C ′. In the present invention, the visibility can be improved by satisfying two or more requirements among the requirements A ′ to C ′, and the visibility is particularly improved by satisfying the requirements in all of the requirements A ′ to C ′. Can be improved.
The requirement A′1 that the transmittance A ′ is 15 to 60%, the requirement B′2 that the transmittance B ′ is 40 to 60%, and the transmittance C ′ that is 35 to 60%. In requirement C′2, visibility can be improved by satisfying two or more requirements in requirements A′2 to C′2, and in all requirements A′2 to C′2. Visibility can be particularly improved by satisfying the requirements.

Next, the relationship between the colorant and the haze value of the light absorption layer will be described.
The haze value of the present light absorption layer is closely related to the size of the pigment particles of the pigment-based colorant used. Here, the pigment particles correspond to particles of a pigment dispersion constituting the pigment dispersion to be used. Specifically, when the size of the pigment particles of the pigment-based colorant to be used is large, it has been confirmed that the haze value is a high numerical value due to irregular reflection caused by coarse particles in the light absorption layer. (Table 1).
On the other hand, no increase in the haze value is confirmed when a dye is used as the colorant. This is presumably because the dye is in a dissolved state at the molecular level in the light absorption layer and there are no coarse particles. From the above, when a pigment-dispersed colorant is used as the colorant used in the light absorption layer, the average particle size of the pigment particles to be formed is 100 nm or less, and the haze value of the light absorption layer is 1.0. It is important to use together with the dye within a range not exceeding.

In the present invention, by setting the haze value to 1.0 or less, it has been found that adverse effects such as white turbidity appearing effectively can be effectively suppressed, and a material that is particularly excellent in visibility can be provided. And visibility can be improved more by making a haze value into 0.5 or less, and 0.3 or less is especially preferred.
The haze value can be adjusted by the cumulative 50% particle size or particle size distribution.

  The particle size distribution that makes it possible to realize the haze value of the present invention will be described. There are various measurement principles and methods for measuring the particle size distribution. Among them, the particle size distribution measuring device based on the “laser diffraction / scattering method” and the particle size distribution based on the “dynamic light scattering method” are used. Measuring devices are now the mainstream of particle size distribution measuring devices.

  The particle size distribution is the size (particle size) of particles in the sample particle group to be measured, and the proportion (relative particle amount with 100% as a whole). It is an index (expression means) to be shown. As the standard (dimension) of the particle amount, there are volume, area, length, and number. The frequency distribution is to divide the target particle diameter range and display the amount of particles existing in each particle diameter section in%.

  In order to introduce the concept of particle size distribution, it is first necessary to define the particle size. However, the shape of most particles is not simply and quantitatively expressed as a sphere or a cube, is complicated and irregular, and the particle size cannot be defined directly. Therefore, an indirect definition of sphere equivalent diameter is used. This is based on the idea that when measuring specific particles, the diameter of a sphere showing the same result (measurement amount or pattern) is used as the particle diameter of the particle to be measured. For example, in the sedimentation method, the particle diameter of the particle to be measured having the same sedimentation velocity as that of a sphere having a diameter of 1 μm and the same substance as the particle to be measured is 1 μm. In the case of the “laser diffraction / scattering method” and the “dynamic light scattering method”, the particle diameter of the particle to be measured showing the same diffraction / scattered light pattern as that of a sphere having a diameter of 1 μm is 1 μm regardless of its shape. .

And the particle size distribution measuring device (the laser diffraction / scattering method is the measurement principle)
In the case of a laser diffraction type particle size distribution measuring apparatus), the foundation is the Mie scattering theory. The relationship between the particle diameter calculated by this theory and the light intensity distribution pattern of diffracted / scattered light is a fundamental scale. This relationship corresponds to the standard device and is stored in each device as a parameter table and used for the particle size distribution calculation. It can be said that the laser diffraction particle size distribution measuring apparatus has good measurement reproducibility as the measuring apparatus itself. If sufficient reproducibility cannot be obtained, it is necessary to examine the cause from various perspectives including sampling and dispersion conditions.

  Further, in the case of the particle size distribution measuring apparatus based on the above-mentioned “dynamic light scattering method as a measurement principle”, the basis is the Brownian motion. When the particles are several μm or less, the particles move due to the influence of solvent molecular motion. This is called the Brownian motion. The speed of this movement depends on the size of the particles. Small particles move fast and large particles move slowly. When these moving particles are irradiated with laser light, scattering of light having different phases according to the speed occurs. This is called a Doppler shift, and the particle size distribution is obtained by detecting the particle size information subjected to the Doppler shift.

  What can be measured using these particle size distribution measuring devices is relative particle size distribution data with the whole as 100%. Therefore, even if the concentration of the particle group to be measured changes, the particle size distribution data does not change theoretically unless there is a problem such as a sampling error. In reality, the measurement result of the particle size distribution is hardly affected by the concentration within an appropriate concentration range in which multiple scattering does not occur.

  The particle size distribution data is expressed as an integration percentage or frequency percentage with respect to the particle size scale, but conversely, it may be expressed as a particle size with respect to the integration percentage scale. As shown in FIG. 5, the particle diameter at the point where the distribution curve of cumulative percentage intersects the horizontal axis of 10% is 10%, the particle diameter at the point where it intersects the horizontal axis of 50% is 50%, and further 90%. The particle diameter at the point that intersects the horizontal axis is called 90% diameter. It is not necessarily fixed at 10%, 50%, and 90%, and an arbitrary integrated percentage is used as necessary. The 50% particle size is also called the median size and is very commonly used. When comparing the sizes of the particle size distributions of a plurality of samples, the median diameter is often used because the size of the measurement target needs to be represented by a single numerical value. For this reason, the median diameter is often confused with the average particle diameter, but the definition is different and usually the two diameters do not match. These two diameters coincide only when the particle size distribution is symmetrical with respect to the center (50% diameter).

In the present invention, in the particle size distribution (cumulative distribution: number display), those having a cumulative 50% particle diameter of 10 to 100 nm can be suitably used, and those having a particle size of 10 to 70 nm are more preferable. Particularly preferably, it has a particle size distribution of 30 to 60 nm. It is preferable to use particles having a distribution with a cumulative 100% particle size of 150 to 250 nm.
If the cumulative 50% particle diameter exceeds 100 nm, the resin composition becomes cloudy and the transparency is significantly reduced at the time of curing, making it extremely difficult to use as an optical material.
On the other hand, when the cumulative 90% particle diameter exceeds 150 nm, cloudiness is conspicuous and the optical properties are inferior.
As described above, by using pigment particles having a certain distribution in particle size, it is possible to provide a resin material having a resilience and transparency by minimizing light scattering due to haze.

The pigment dispersion used in the present invention is a pigment dispersion that satisfies the above-described haze value characteristics and satisfies the fastness characteristics described later.
The dispersant in the pigment dispersant is not particularly limited as long as it is a known one, but for example, a polyester dispersant, an acrylic dispersant and the like can be used.
As specific product names, “Ajispur PB821, 822, 824, 711, 881” manufactured by Ajinomoto Fine Techno Co., Ltd., “Solsperse 5000, 13940, 17000, 24000GR, 32000, 33000, 35000, 39000, 53000, manufactured by Lubrizol Co., Ltd. J-100 "," Disperbyk-140, 182, 2000, 2001, 2022, 2025, 2055, 2164, 2200, Byk-9076, 9077 "manufactured by Big Chemie," Fuka 44, 46, 47, 48, 49 "manufactured by BASF , 54, 63, 64, 65, 66, 71, 701, 764, 766 ”,“ Floren DOPA-17HF, 22, 350 ”manufactured by Kyoeisha Chemical Co., Ltd.,“ Disparon DA-234, 325, 375, 703 ”manufactured by Enomoto Kasei Co., Ltd. -50, 120 , 7301 ", and the like. Examples of pigment dispersants that are particularly excellent in stability and dischargeability include basic pigment dispersants. Specifically, Solsperse 17000, 24000GR, 32000, 33000, 35000, 39000, 53000, J-100, Ajisper PB821, 822, 824, 711, 881 etc. are mentioned.

The pigment in the pigment dispersion is not particularly limited as long as it is a known pigment, and examples thereof include a carbon black pigment. And it is preferable to use the pigment whose haze value satisfy | fills the said particle size distribution for the particle size distribution of a pigment. Here, as a pigment having such a particle size distribution, any known pigment can be used without particular limitation. For example, # 2650, # 2600, # 2350, # 2300, # 980, # 970, # 960 can be used. , # 950, # 900, # 850, # 750B, # 650B, MA600, # 52, # 47, # 44, # 40 (Mitsubishi Chemical Corporation);
Examples of the solvent include C1-C4 alkanols such as methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol and tert-butanol; carboxylic acid amides such as N, N-dimethylformamide and N, N-dimethylacetamide Lactams such as 2-pyrrolidone and N-methylpyrrolidin-2-one; cyclic ureas such as 1,3-dimethylimidazolidin-2-one or 1,3-dimethylhexahydropyrimido-2-one; acetone , Ketones such as methyl ethyl ketone and 2-methyl-2-hydroxypentan-4-one or keto alcohols; cyclic ethers such as tetrahydrofuran and dioxane; ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 1,2 -Butylene Glyco 1,4-butylene glycol, pentamethylene glycol, 1,6-hexylene glycol, 1,2-hexylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, polyethylene glycol, polypropylene glycol, thiodi Monomers, oligomers or polyalkylene glycols or thioglycols having C2-C6 alkylene units such as glycol and dithiodiglycol; polyols (triols) such as glycerin and hexane-1,2,6-triol; ethylene glycol monomethyl ether, ethylene Glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl Ether such as (butyl carbitol) or triethylene glycol monomethyl ether or triethylene glycol monoethyl ether, C1-C4 alkyl ethers of polyhydric alcohols; gamma-butyrolactone; and dimethyl sulfoxide; and the like.
The preparation of the pigment dispersion can be adjusted by mixing the above components and dispersing using a dispersing machine such as a bead mill, a paint shaker, or a mixer.

The content of the pigment dispersion of the present invention is usually 0.01 to 1 part by weight, preferably 0.05 to 0.5 parts by weight, with respect to 100 parts by weight of the pressure-sensitive adhesive resin composition of the present invention. Particularly preferably, 0.1 to 0.3 parts by mass is contained.

Subsequently, the durability of the coloring material will be described.
Since the selection of the colorant greatly affects the optical characteristics of the color filter, many studies have been conducted so far. Since the color filter for liquid crystal displays undergoes a high temperature process of about 230 ° C. in the manufacturing process, heat resistance often becomes a problem when applying pigment-dispersed colorants and dyes. On the other hand, since the color filter for organic EL displays does not go through such a high-temperature process, it can be put into practical use if it has a heat resistance of about 180 ° C. Therefore, the coloring material used for the color filter for organic EL displays has a low heat resistance requirement and can be used even with a material having low heat resistance. However, regarding light resistance, further improvement is required even for organic EL display applications.

  Therefore, as the colorant used in the color filter for organic EL display, a compound having a high light fastness as a compound structure is selected, and a light resistance improver such as an antioxidant that does not affect other physical properties is used in combination. It is important to.

Incidentally, what is high and the fastness to light refers to black panel temperature of 63 ° C., increasing in transmittance by irradiation illuminance 500 W / m ² and the carbon arc light resistance test for 100 hours is not more than 5%. By selecting a colorant contained in the light absorption layer that has a change rate in the light resistance test within the above range, it is possible to maintain a stable light absorption effect over a long period of time.
By satisfying the requirements for the rate of change, deterioration and performance change due to heat hardly occur over a long period of time, and the high visibility obtained by adjusting the above-mentioned haze value and transmittance at 400 to 700 nm can be changed to the surrounding environment. Nevertheless, it can be secured for a long time.

From the above viewpoint, as the colorant used in the color filter for organic EL display, for example, those described below are suitable in terms of spectral surface, haze surface, and durability. Examples of the black colorant include a carbon black pigment dispersion (see Example 1 for the dispersion composition), and examples of the yellow colorant include C.I. I. Solvent yellow (hereinafter abbreviated as SY) 93, SY117, SY163, SY167, SY189, and red colorant include, for example, C.I. I. Solvent Red (hereinafter abbreviated as SR) 52, SR111, SR145, SR146, SR149, SR150, SR151, SR155, SR168, SR169, SR170, SR172, SR175, SR181, SR196, SR197, SR207, SR222, SR227, SR245, SR247 Examples of purple coloring materials include C.I. I. Solvent violet (hereinafter abbreviated as SV) 13, SV14, SV26, SV31, SV36, SV38, SV51, SV59, SV60, blue colorants include, for example, C.I. I. Solvent Blue (hereinafter abbreviated as SB) SB11, SB12, SB35, SB36, SB45, SB58, SB59, SB63, SB68, SB69, SB78, SB79, SB83, SB94, SB97, SB98, SB100, SB101, SB102, SB104, SB105 , SB111, SB112, SB122, SB128, SB132, SB136, green colorants include, for example, C.I. I. Solvent green (hereinafter abbreviated as SG) 3, SG20, SG28 and the like can be mentioned, but are not limited to those shown here.
As the dye of the coloring material of the present invention, it is preferable to use a solvent-soluble dye. Here, the solvent-soluble dye is one that dissolves in 100 g of a solvent (MEK) by 0.01% or more. In the light absorption layer of the present invention, a uniform resin composition is prepared by dissolving a dye with a solvent and containing a carbon black pigment, and applied as a light absorption layer. This is because the resin composition can be achieved. Here, each color coloring material listed above is a solvent-soluble dye, and any dye that dissolves in a solvent can be used without any particular limitation.

Of the above solvent-soluble dyes, quinoline dyes, azine dyes, acridine dyes, methine dyes, rhodamine dyes, anthraquinone dyes, anthraquinone dyes, xanthene dyes, indigo dyes can be used. Dyes, anthrapyridone dyes, azo dyes, and phthalocyanine dyes can be used. Anthraquinone dyes and anthrapyridone dyes are preferable, and anthraquinone dyes are particularly preferable from the viewpoint of exhibiting particularly high fastness.

In the present invention, as described above, it is preferable to use a colorant so as to have a specific light absorption at each wavelength. Therefore, it is preferable to use a plurality of colorants having high fastness in combination. And in the transmittance | permeability of the said 400-430 nm wavelength region, the transmittance | permeability of the wavelength region of 530-580 nm, and the transmittance | permeability of the wavelength region of 630-660 nm, it satisfies the said requirements AC thru | or requirements A'-C '. Three or more colorants having different skeletons, more preferably five or more colorants, and particularly preferably seven or more colorants can be mixed and used.
Here, it is preferable to use one kind of material that absorbs the wavelength region of 400 to 430 nm so as to satisfy the above requirements A to C or A ′ to C ′, and absorbs the wavelength region of 530 to 580 nm. It is preferable to use two or more types of materials to be used, and it is preferable to use two or more types of materials that absorb light in the wavelength region of 630 to 660 nm.
In the present invention, it is preferable that the increase in transmittance is 5% or less in a carbon arc light resistance test for 100 hours when each of the various dyes has a black panel temperature of 63 ° C. and an irradiation illuminance of 500 W / m ² .

The content of the dye of the present invention is usually 0.01 to 3 parts by mass, preferably 0.05 to 1 part by mass, and particularly preferably 0 to 100 parts by mass of the pressure-sensitive adhesive resin composition of the present invention. .1 to 0.5 parts by mass.

  The addition of an antioxidant or a light resistance improver such as a singlet oxygen quencher to the colorant can effectively improve the resistance to deterioration against light, so it is preferable to add it. .

  As the antioxidant, known ones can be used without particular limitation. For example, phenolic antioxidants include 2,6-t-butyl-4-methylphenol, tetrakis [3- (3 ′, 5′-di-t-butyl-4′-hydroxyphenyl) propionic acid] penta Erythritol, n-octadecyl-3- (3′5′-di-t-butyl4′-hydroxyphenyl) propionate, tris [N- (3,5-di-t-butyl-4-hydroxybenzyl)] isocyanurate Butylidene-1,1-bis- (2-methyl-4-hydroxy-5-t-butyl-phenyl), triethylene glycol bis [3- (3-t-butyl-4-hydroxy-5-methylphenyl) Propionate], 3,9-bis {2- [3 (3-t-butyl-4-hydroxy-5-methylphenyl) propionyloxy] -1,1-dimethylethyl } -2,4,8,10-tetraoxaspiro [5,5] undecane and the like, and as the sulfur-based antioxidant, bis [3- (dodecylthio) propanate] thiobis [2- (1,1- Dimethylethyl) -5-methyl-4,1phenylene], 2,4-bis (octylthiomethyl) -6-methylphenol, bis [2-methyl-4- {3-n-dodecylthiopropionyloxy} -5 -T-butylphenyl] sulfide, 3-dodecylsulfanylpropanoic acid = 2-t-butyl [(5-t-butyl-4-hydroxy-2-methylphenyl) sulfanyl] -5-methylphenyl, etc. As the system antioxidant, 3,9-bis (2,6-di-t-butyl-4-methylphenoxy) -2,4,8,10-tetraoxa-3,9-diphos is used. Faspiro [5.5] undecane, bis (tridecyl) pentaerythritol diphosphite, bis (nonylphenyl) pentaerythritol diphosphite and the like can be mentioned, and amine antioxidants include ADK STAB LA-52, LA-57, LA-63, LA-68, LA-81, LA-82 (manufactured by ADEKA), Tinuvin-111, 123, 144 (manufactured by BASF) and the like can be mentioned. As the singlet oxygen quencher, di-n -Nickel butyldithiocarbamate, D1781 (manufactured by Tokyo Chemical Industry Co., Ltd.), EST-5 (manufactured by Sumitomo Seika Co., Ltd.) and the like can be mentioned, but are not limited to those shown here.

The ultraviolet absorber is not particularly limited, and for example, 1,2,3-benzotriazole, 1- [N, N-bis (2-ethylhexyl) aminomethyl] benzotriazole, carboxybenzotriazole, 2- [2- Hydroxy-3,5-bis (α, α-dimethylbenzyl) phenyl] -2H-benzotriazole, 2- (2-hydroxy-4-octylphenyl) -2H-benzotriazole, 2- (2′-hydroxy-3) ', 5'-di-tert-butylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3'-tert-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- ( 2'-hydroxy-3'-tert-amyl-5'-isobutylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy 3'-isobutyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3'-isobutyl-5'-propylphenyl) -5-chlorobenzotriazole, 2- (2'- Hydroxy-3 ′, 5′-di-tert-butylphenyl) benzotriazole, 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- [2′-hydroxy-5 ′-(1,1) , 3,3-tetramethyl) phenyl] benzotriazole, and the like, but are not limited to those shown here.
Triazine-based ultraviolet absorbers can be roughly classified into mono (hydroxyphenyl) triazine compounds, bis (hydroxyphenyl) triazine compounds, and tris (hydroxyphenyl) triazine compounds. Specific examples of mono (hydroxyphenyl) triazine compounds include 2- [4-[(2-hydroxy-3-dodecyloxypropyl) oxy] -2-hydroxyphenyl] -4,6-bis (2,4-dimethyl). Phenyl) -1,3,5-triazine, 2- [4-[(2-hydroxy-3-tridecyloxypropyl) oxy] -2-hydroxyphenyl] -4,6-bis (2,4-dimethylphenyl) ) -1,3,5-triazine, 2- (2,4-dihydroxyphenyl) -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 2- (2-hydroxy-) 4-isooctyloxyphenyl) -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 2- (2-hydroxy-4-dodecyloxyphenyl) -4,6-bis ( 2,4-dimethylphenyl) -1,3,5-triazine, etc. Specific examples of bis (hydroxyphenyl) triazine compounds include 2,4-bis (2-hydroxy-4-propyloxyphenyl) -6- (2,4-dimethylphenyl) -1,3,5. -Triazine, 2,4-bis (2-hydroxy-3-methyl-4-propyloxyphenyl) -6- (4-methylphenyl) -1,3,5-triazine, 2,4-bis (2-hydroxy) -3-methyl-4-hexyloxyphenyl) -6- (2,4-dimethylphenyl) -1,3,5-triazine, 2-phenyl-4,6-bis [2-hydroxy-4- [3- And (methoxyheptaethoxy) -2-hydroxypropyloxy] phenyl] -1,3,5-triazine.
Specific examples of the tris (hydroxyphenyl) triazine compound include 2,4-bis (2-hydroxy-4-butoxyphenyl) -6- (2,4-dibutoxyphenyl) -1,3,5-triazine. 2,4,6-tris (2-hydroxy-4-octyloxyphenyl) -1,3,5-triazine, 2,4,6-tris [2-hydroxy-4- (3-butoxy-2-hydroxy) Propyloxy) phenyl] -1,3,5-triazine, 2,4-bis [2-hydroxy-4- [1- (isooctyloxycarbonyl) ethoxy] phenyl] -6- (2,4-dihydroxyphenyl) -1,3,5-triazine, 2,4,6-tris [2-hydroxy-4- [1- (isooctyloxycarbonyl) ethoxy] phenyl] -1,3,5-triazine, 2,4-bis [2-Hydroxy-4- [1- (isooctyloxy Carbonyl) ethoxy] phenyl] -6- [2,4-bis [1- (iso-octyloxy) ethoxy] phenyl] -1,3,5-triazine, and the like.
In the present invention, these antioxidants, ultraviolet absorbers and the like may be used singly or more preferably in combination of two or more.

In addition, the resin composition of the present invention may contain a silane coupling agent, a polymerization inhibitor, and a light stabilizer.

  Specific examples of the silane coupling agent include, for example, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxy) (Cyclohexyl) ethyltrimethoxysilane, N- (2-aminoethyl) 3-aminopropylmethyldimethoxysilane, γ-mercapropropyltrimethoxysilane, N- (2-aminoethyl) 3-aminopropylmethyltrimethoxysilane, 3 -Aminopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, vinyltrimethoxysilane, N- (2- (vinylbenzylamino) ethyl) 3-aminopropyltrimethoxysilane hydrochloride, 3-methacryloxypropyltrimethoxysilane 3 Silane coupling agents such as chloropropylmethyldimethoxysilane and 3-chloropropyltrimethoxysilane; isopropyl (N-ethylaminoethylamino) titanate, isopropyl triisostearoyl titanate, titanium di (dioctyl pyrophosphate) oxyacetate, tetra Titanium coupling agents such as isopropyldi (dioctylphosphite) titanate and neoalkoxytri (pN- (β-aminoethyl) aminophenyl) titanate; Zr-acetylacetonate, Zr-methacrylate, Zr-propionate, neo Alkoxy zirconate, neoalkoxy trisneodecanoyl zirconate, neoalkoxy tris (dodecanoyl) benzenesulfonyl zirconate, neoalkoxy tris ( Chi range aminoethyl) zirconate, neoalkoxy tris (m-aminophenyl) zirconate, ammonium zirconium carbonate, Al- acetylacetonate, Al- methacrylate, zirconium or the like Al- propionate, or aluminum coupling agent, and the like.

  Specific examples of the polymerization inhibitor include paramethoxyphenol and methylhydroquinone.

  Specific examples of the light stabilizer include, for example, 1,2,2,6,6-pentamethyl-4-piperidyl alcohol, 2,2,6,6-tetramethyl-4-piperidyl alcohol, 1,2,2, 6,6-pentamethyl-4-piperidyl (meth) acrylate (manufactured by ADEKA Corporation, LA-82), tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) -1,2,3 4-butanetetracarboxylate, tetrakis (2,2,6,6-totramethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate, 1,2,3,4-butanetetracarboxylic acid 1,2,2,6,6-pentamethyl-4-piperidinol and 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro [5.5] Undeka Esterified product with bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1-undecanoxy-2,2,6,6-tetramethylpiperidin-4-yl) ) Carbonate, 2,2,6,6, -tetramethyl-4-piperidyl methacrylate, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6) -Pentamethyl-4-piperidyl) sebacate, 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, 1- [2- [3- (3,5-di-tert-butyl-4-hydroxyphenyl) Propionyloxy] ethyl] -4- [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxy] -2,2,6,6-tetramethylpi Lysine, 1,2,2,6,6-pentamethyl-4-piperidinyl-methacrylate, bis (1,2,2,6,6-pentamethyl-4-piperidinyl) [[3,5-bis (1,1 -Dimethylethyl) -4-hydroxyphenyl] methyl] butylmalonate, decanedioic acid bis (2,2,6,6-tetramethyl-1 (octyloxy) -4-piperidinyl) ester, 1,1-dimethylethyl Reaction product of hydroperoxide and octane, N, N ′, N ″, N ″ ′-tetrakis- (4,6-bis- (butyl- (N-methyl-2,2,6,6-tetramethylpiperidine- 4-yl) amino) -triazin-2-yl) -4,7-diazadecane-1,10-diamine, dibutylamine, 1,3,5-triazine, N, N′-bis (2,2,6, 6-te A polycondensate of tramethyl-4-piperidyl-1,6-hexamethylenediamine and N- (2,2,6,6-tetramethyl-4-piperidyl) butylamine, poly [[6- (1,1,3, 3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl] [(2,2,6,6-tetramethyl-4-piperidyl) imino] hexamethylene [(2,2,6 , 6-tetramethyl-4-piperidyl) imino]], a polymer of dimethyl succinate and 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol, 2,2,4,4-tetra Methyl-20- (β-lauryloxycarbonyl) ethyl-7-oxa-3,20-diazadispiro [5 · 1 · 11 · 2] heneicosan-21-one, β-alanine, N,-(2,2,6 , 6-Tetra Methyl-4-piperidinyl) -dodecyl ester / tetradecyl ester, N-acetyl-3-dodecyl-1- (2,2,6,6-tetramethyl-4-piperidinyl) pyrrolidine-2,5-dione, 2, 2,4,4-tetramethyl-7-oxa-3,20-diazadispiro [5,1,11,2] heneicosan-21-one, 2,2,4,4-tetramethyl-21-oxa-3, 20-diazadicyclo- [5,1,11,2] -heneicosane-20-propanoic acid dodecyl ester / tetradecyl ester, propanedioic acid, [(4-methoxyphenyl) -methylene] -bis (1,2,2 , 6,6-pentamethyl-4-piperidinyl) ester, a higher fatty acid ester of 2,2,6,6-tetramethyl-4-piperidinol, 1,3- Hindered amines such as benzenedicarboxamide, N, N′-bis (2,2,6,6-tetramethyl-4-piperidinyl), benzophenone compounds such as octabenzone, 2- (2H-benzotriazole-2) -Yl) -4- (1,1,3,3-tetramethylbutyl) phenol, 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2- [2-hydroxy-3- (3,4, 5,6-tetrahydrophthalimido-methyl) -5-methylphenyl] benzotriazole, 2- (3-tert-butyl-2-hydroxy-5-methylphenyl) -5-chlorobenzotriazole, 2- (2-hydroxy- 3,5-di-tert-pentylphenyl) benzotriazole, methyl 3- (3- (2H-benzotriazol-2-yl) ) -5-tert-butyl-4-hydroxyphenyl) propionate and polyethylene glycol reaction product, benzotriazole compounds such as 2- (2H-benzotriazol-2-yl) -6-dodecyl-4-methylphenol, Benzoate series such as 2,4-di-tert-butylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate, 2- (4,6-diphenyl-1,3,5-triazin-2-yl ) -5-[(hexyl) oxy] phenol and other triazine compounds, and the like, particularly preferably hindered amine compounds.

The content of the various additives described above is usually 0.01 to 5 parts by weight, preferably 0.05 to 3 parts by weight, particularly preferably 100 parts by weight of the pressure-sensitive adhesive resin composition of the present invention. Contains 0.1 to 1 part by mass.

Next, the adhesive resin composition contained in the light absorption layer will be described.
As the resin component used in the light absorption layer, an acrylic resin copolymer is suitable.
The acrylic resin copolymer is composed of an acrylic acid alkyl ester as a polymerization component, a polymerizable monomer having a carboxyl group in the molecule, a polymerizable monomer having a hydroxyl group in the molecule, and a comonomer as necessary. Other monomer components such as are used. Examples of the acrylic acid alkyl ester include methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, n-propyl (meth) acrylate, isobutyl (meth) acrylate, (meth) Examples include (meth) acrylic acid (having 1 to 12 carbon atoms) alkyl esters such as n-butyl acrylate, t-butyl (meth) acrylate, and dodecyl (meth) acrylate.

Examples of the polymerizable monomer having a carboxyl group in the molecule include acrylic acid, methacrylic acid, maleic acid, and itaconic acid. Examples of the polymerizable monomer having a hydroxyl group in the molecule include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 3-chloro-2-hydroxypropyl (meta ) Acrylate, etc., hydroxy (C1-5) alkyl (meth) acrylate, diethylene glycol (meth) acrylate such as diethylene glycol mono (meth) acrylate, and the like, and glycidyl (meth) acrylate, allyl glycidyl ether, etc. It is done.
Examples of other monomers such as comonomer include vinyl acetate, acrylonitrile, and styrene.
The proportion of these monomers used is not particularly limited, but the (meth) acrylic acid alkyl ester is 50 to 98% by weight, the polymerizable monomer having a carboxyl group in the molecule is 0.5 to 10% by weight, The polymerizable monomer having a hydroxyl group in the molecule is preferably 0.1 to 20% by weight, and the functional group-free monomer is preferably 0 to 20% by weight.
The weight average molecular weight is preferably about 300,000 to 3,000,000, more preferably 500,000 to 2,000,000, and particularly preferably 800,000 to 1,500,000. When the weight average molecular weight is less than 300,000, the heat resistance is insufficient, and when the weight average molecular weight is more than 3 million, the adhesiveness is lowered.
The (meth) acrylic resin copolymer used in the present invention can be easily produced by dissolving the monomer to be used in an organic solvent and radically copolymerizing it in the organic solvent by a well-known method.
The (meth) acrylic resin copolymer used in the present invention can be used alone or as an optical pressure-sensitive adhesive, but can be used as an optical pressure-sensitive adhesive in a composition that can be cross-linked by adding a crosslinking agent as required. May be. Any suitable crosslinking agent may be used. In general, for example, polyisocyanate compounds such as aliphatic diisocyanates and aromatic diisocyanates, melamine compounds such as butyl etherified styrene melamine and trimethylol melamine, diamine compounds, epoxy resin compounds, urea resin compounds, metal salts and the like are used. . When the crosslinking agent is blended, the blending amount is 0.001 to 10 parts by weight, preferably 0.005 to 5 parts by weight, more preferably 0.01 to 5 parts by weight per 100 parts by weight of the acrylic resin copolymer. . Moreover, you may mix | blend a silane coupling agent. When the silane coupling agent is blended, the blending amount is 0.001 to 10 parts by weight, preferably 0.005 to 5 parts by weight, more preferably 0.01 to 5 parts by weight per 100 parts by weight of the acrylic resin copolymer. It is.
The pressure-sensitive adhesive resin composition of the present invention can be formed by, for example, drying at 80 to 150 ° C. for about 0.5 to 10 minutes after coating on a support substrate (optical transparent film, release film).

<Outer layer part 5>
The outer layer portion 5 is a transparent substrate, and is required to be provided with scratch resistance and hardness so that scratches are difficult to occur during handling. Although it will not specifically limit if it is a transparent base material, An antireflection film is suitable. In addition, the optical base material that can be used as the outer layer portion 5 is not particularly limited as long as it is a known base material. For example, TAC, COP, a glass plate, and the like can be used.
The antireflection film is indispensable for sufficiently reducing reflection of external light, eliminating reflection unevenness, and improving display quality. The outermost layer of the antireflection film is a low refractive layer, and the antireflection function can be obtained by forming a multilayer film made of a transparent thin film such as a metal oxide as an antireflection layer on a transparent substrate. These multilayer films are processed by a dry coating method such as a chemical vapor deposition (CVD) method or a physical vapor deposition (PVD) method, a wet coating method capable of increasing the area, continuous production, and cost reduction. The transparent base film used for the antireflection film is not particularly limited as long as it is a plastic film having transparency. For example, a polyethylene terephthalate film, a polytrimethylene terephthalate film,
Polyester film such as polybutylene terephthalate and polyethylene naphthalate film, cellulose film such as diacetyl cellulose film and triacetyl cellulose film, acrylic film such as polycarbonate film and polymethyl methacrylate film, styrene-acrylonitrile copolymer film Examples thereof include polyolefin films such as styrene film, polyethylene film, polypropylene film, and polycyclic olefin film. The thickness of the transparent substrate film is, for example, 20 to 250 μm.

<Insulating resin layer 6>
Examples of the material for the insulating resin layer 6 include a thermosetting resin composition and a photocurable resin composition.
The photocurable resin composition is the same as the binder resin used for the color layers for forming the color filter, for example, acrylate, methacrylate, polyvinyl cinnamate, or cyclized rubber A photosensitive resin having a reactive vinyl group is used.
In this case as well, a photopolymerization initiator may be added to the photosensitive resin composition for forming colored portions containing the photosensitive resin, and further, a sensitizer, a coating property improver, and a development improver as necessary. Further, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant and the like may be added.
Examples of the thermosetting resin composition include those using an epoxy compound and those using a thermal radical generator.
As an epoxy compound, the well-known polyvalent epoxy compound which can be hardened | cured with carboxylic acid, an amine compound, etc. can be mentioned.
The thermal radical generator is at least one selected from the group consisting of persulfates, halogens such as iodine, azo compounds, and organic peroxides, more preferably azo compounds or organic peroxides.
Examples of the azo compound include 1,1′-azobis (cyclohexane-1-carbonitrile, 1-[(1-cyano-1-methylethyl) azo] formamide, 2,2′-azobis- [N- (2-propenyl). ) -2-methylpropionamide], 2,2′-azobis (N-butyl-2-methylpropionamide), 2,2′-azobis (N-cyclohexyl-2-methylpropionamide) and the like, Examples of the organic peroxide include di (4-methylzenzoyl) peroxide, t-butylperoxy-2-ethylexanate, 1,1-di (t-hexylperoxy) cyclohexane, 1,1-di ( t-butylperoxy) cyclohexane, t-butylperoxybenzoate, t-butylperoxy-2-ethylhexyl monocarbonate, t-butyl Examples include til-4,4-di- (t-butylperoxy) butanate and dicumyl peroxide.
Here, although the insulating resin layer 14 is used, a sealing material for bonding and an inorganic film for passivation are also used in this portion depending on circumstances.

<Black Matrix 7>
As the light-shielding colored layer for forming the black matrix 7 that separates the pixel areas of the colored layers for each color filter, for example, here, carbon black covered with a resin such as an epoxy resin is used as a pigment (pigment). Are used that are dispersed in a binder resin.
In the case where carbon black is dispersed as a pigment (pigment) in a binder resin, the light-shielding resin layer can be formed with a relatively thin film thickness.
Here, the light-blocking colored layer of the black matrix is formed using a photolithography method. In this case, as the binder resin, for example, an acrylate type, a methacrylate type, a polyvinyl cinnamate type, or a cyclized rubber type is used. A photosensitive resin having a reactive vinyl group is used.
In this case, a photopolymerization initiator may be added to the photosensitive resin composition for forming a black matrix containing a black colorant and a photosensitive resin, and further, if necessary, a sensitizer, a coatability improver, A development improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, and the like may be added.
The light-blocking colored layer of the black matrix may be formed using a printing method or an inkjet method. In this case, examples of the binder resin include polymethyl methacrylate resin, polyacrylate resin, and polycarbonate resin. , Polyvinyl alcohol resin, polyvinyl pyrrolidone resin, hydroxyethyl cellulose resin, carboxymethyl cellulose resin, polyvinyl chloride resin, melamine resin, phenol resin, alkyd resin, epoxy resin, polyurethane resin, polyester resin, maleic acid resin, polyamide resin, etc. .
Note that the opening pattern shape of the black matrix and the arrangement of the colored layers of each color are not limited.
There are also examples in which the opening pattern shape of the black matrix is a stripe shape, or the arrangement of the colored layers is changed such as a dogleg shape or a delta arrangement.

5. Other Configurations The color filter for an organic EL display device of the present invention only needs to have the transparent substrate, the colored layer, and the light absorption layer, and can have other configurations as necessary. Examples of such a configuration include a light shielding portion, a protective layer, a TFT element, and an electrode layer.

(1) Light-shielding part In this invention, the light-shielding part may be formed in pattern shape on the transparent base material.
The shape of the opening of the light shielding portion is appropriately selected depending on the pattern arrangement of the pixel portion of the organic EL display device.
Examples of the light shielding part include those containing a metal material such as chromium, those obtained by dispersing a light shielding material in a resin, and those obtained by laminating a plurality of layers made of the same material as each colored layer.
A general thing can be applied about the material, thickness, its formation method, etc. of a light-shielding part.

(2) Protective layer In this invention, the protective layer may be formed so that a colored layer and a light absorption layer may be covered. The protective layer is particularly preferably used when the color filter for an organic EL display device of the present invention is used in a bottom emission type organic EL display device.
The material of the protective layer is not particularly limited as long as it does not impair the color characteristics of the color filter for an organic EL display device, particularly the above-described transmission characteristics of the white portion, and a general transparent resin can be used. Among these, a photocurable resin is preferable because it can be patterned.
About the thickness and formation of a protective layer, it can be made to be the same as that of the general protective layer in a color filter.

(3) TFT element When using the color filter for organic EL display devices of the present invention for a bottom emission type organic EL display device, the TFT element may be formed on a transparent substrate. As the TFT element, a general element can be used.

(4) Electrode layer In this invention, the electrode layer may be arrange | positioned on the colored layer and the light absorption layer.
Examples of the electrode layer include a metal electrode layer and a transparent electrode layer.
The metal electrode layer can be formed in a region not used for display in the color filter for an organic EL display device, such as on the light shielding portion.

Next, a second example of the embodiment of the organic EL display device of the present invention will be given.
In the second example, as shown in FIG. 6, the light absorption layer 4 is arranged at a position different from that of the first example, and the light absorption layer covers the colored layers 3R, 3G, 3B, and 3W. It is formed by stacking. The rest is the same as the first example.
The second example is also used in a display device having the same application as the first example, and by using the light absorption layer having the above-described transmittance as in the first example, external light is incident from the front surface. Compared with an organic EL display device using a circularly polarizing plate, it can reduce the reflected light of diplomatic light that is reflected and emitted from internal electrodes and wiring, and reduces the reduction of light passing through the display. In particular, the amount of transmitted light during display can be increased. That is, even if the transmittance is 80%, which is the upper limit, if it is reflected light, the light reflected and reflected after entering the light absorbing layer will be transmitted again through the light absorbing layer. The transmittance can be obtained, and the influence of reflected light can be greatly reduced.
Moreover, as shown in FIG. 7, it is also possible to form 3W by using the same resin composition as the light absorption layer 4. In this case, since the white colored layer is made of the same material as the light absorption layer, the type of material can be reduced, and an organic EL device can be easily and inexpensively created. In addition, when only the white colored layer is a light absorbing layer, the transmission characteristics of the light absorbing layer do not affect the colored portion, so the transmittance of the colored portion is not lowered and the transmission characteristics of the white portion are optimized. It can be. Furthermore, since the intensity of the reflected light that causes the uneven reflection can be further attenuated, the uneven reflection can be suitably suppressed.

Next, the 3rd example of embodiment of the organic electroluminescence display of this invention is given.
In the third example, as shown in FIG. 8, the light absorption layer 4 and the black matrix 7 are formed of the same material. The rest is the same as the first example. The third example is also used in a display device having the same application as the first example, and by using the light absorption layer having the above-described transmittance as in the first example, external light is incident from the front surface. Compared with an organic EL display device using a circularly polarizing plate, it can reduce the reflected light of diplomatic light that is reflected and emitted from internal electrodes and wiring, and reduces the reduction of light passing through the display. In particular, the amount of transmitted light during display can be increased. That is, even if the transmittance is 80%, which is the upper limit, if it is reflected light, the light reflected and reflected after entering the light absorbing layer will be transmitted again through the light absorbing layer. The transmittance can be obtained, and the influence of reflected light can be greatly reduced.

A method for producing the organic EL display device of the first example will be described with reference to FIG.
As shown in FIG. 9A, an outer layer (for example, an antireflection film) is prepared in advance, and a black matrix is first formed on the surface of the antireflection film 5 by a photolithographic method as shown in FIG. 9B. To do.
Thereafter, as shown in FIG. 9C, the light absorption layer 4 is formed so as to cover the entire black matrix 7 formation side. The material for forming the light absorption layer is as described above, and as the coating method, an inkjet method, a printing method, a gelatin staining method, a photolithography method, or the like is applied.
Thereafter, colored layers 3R, 3B, 3G, and 3W of the respective colors are sequentially formed in a predetermined formation region by a photolithography method or the like.
Thus, the member of the organic EL display device can be formed, and then the organic EL display device can be obtained by laminating the insulating resin, the light emitting layer, and the base material.

By adopting such a configuration, the color filter forming substrate of the present invention has a white light source type organic EL display including a colored pixel region and a WHITE pixel region which are pixel regions provided with a colored layer for a color filter. Providing a color filter forming substrate that can reduce the reflection of external light, prevent the display luminance from decreasing, and can easily produce an organic EL display device that is satisfactory in terms of display quality. It is possible.
Specifically, by laminating a light absorption layer having a transmittance of 15% to 80% in the wavelength region (visible light region) of 400 nm to 700 nm in the colored pixel region and the WHITE pixel region, Have achieved.

Specifically, the pixel region of the three color layers of R, G, and B is provided as the pixel region of the color layers for the color filters, and the color layers of the respective colors of R, G, and B are used. In addition to the pixel region, a mode in which a WHITE pixel region is provided can be given.
In the case of this embodiment, for example, if the light absorption layer is formed in the WHITE pixel region and the G colored layer and the pixel region for the color filter having a high display luminance, each of the other colors R and B Even if a light absorption layer is not provided in the pixel region of the colored layer, it is possible to reduce external light reflection and prevent display luminance from being lowered.

  By adopting such a configuration, the display device of the present invention is satisfactory in terms of display quality and a white light emitting type provided with WHITE pixels in addition to colored pixels of R, G, and B colors for color filters. An organic EL display device that can be used is provided.

  Examples of the organic EL display device include those for mobile electronic devices such as mobile notebook computers and multifunction terminal devices (also referred to as high-end devices). In addition, for example, it can be incorporated into an electronic device such as a television, a small game machine, a mobile phone, and a personal computer, but is not limited thereto.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and those having substantially the same configuration as the technical idea described in the claims of the present invention and exhibiting the same operational effects are included in the technical scope of the present invention. Is done.

  Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples.

<Example 1>
(Example A: Adjustment of carbon black pigment dispersion)
The following components were mixed and sufficiently dispersed using a paint shaker to prepare a carbon black pigment dispersion material (black colorant).
* Carbon black pigment (Mitsubishi Chemical Co., Ltd. # 950) 15 parts by weight * Pigment dispersant (Ajinomoto Fine Techno Co., Ltd., Azisper PB881 7 parts by weight * MEK 78 parts by weight After dilution with MEK to 0.02%, the median diameter (50% particle diameter) was measured with a particle size distribution analyzer (LB-500, manufactured by HORIBA, Ltd.). The diameter was 50 nm.

(Adhesive resin adjustment)
96 g of n-butyl acrylate and 4 g of acrylic acid are dissolved in 185 g of ethyl acetate, 0.05 g of azobisisobutyronitrile is added, and polymerization is carried out at 70 ° C. for 5 hours to obtain an acrylic resin copolymer (average molecular weight: 1 , 200,000). Further, triacrylolpropane (1 mol) of tolylene diisocyanate (3 mol) was added to 100 parts by weight of the acrylic resin copolymer solution (viscosity 2,000 cps / 25 ° C.) prepared so that the resin content was 20% by weight with ethyl acetate. ) 0.5 parts by weight of an adduct was blended to obtain an acrylic adhesive resin of the present invention.

(Adjustment of colored adhesive resin composition)
A carbon black pigment dispersant, a dye, an additive, and methyl ethyl ketone were blended with the acrylic adhesive resin in the following parts by weight, mixed and stirred to obtain a colored adhesive resin composition.
* Acrylic adhesive resin 100 parts by weight * Carbon black pigment dispersion 0.10 parts by weight * C. I. Solvent Yellow 93 0.03 parts by weight * C.I. I. Solvent Blue 35 0.03 parts by weight * C.I. I. Solvent violet 13 0.08 parts by weight * C.I. I. Solvent Red 111 0.03 parts by weight * C.I. I. Solvent Green 3 0.20 parts by weight * Tetrakis [3- (3 ′, 5′-di-t-butyl-4′-hydroxyphenyl) propionic acid] pentaerythritol 0.2 parts by weight * TINUVIN-144 0.2 parts by weight * TINUVIN-928 0.2 parts by weight * Methyl ethyl ketone 33 parts by weight

(Production of light absorption layer)
Using a comma coater, the colored adhesive resin composition mixed and dissolved is dried on the release treatment surface of a PET film treated with a silicon release agent so that the thickness of the colored resin composition layer after drying is 18 μm. Apply lightly, dry at 110 ° C. for 3 minutes, and after drying, attach the release treatment surface of the PET film treated with the silicone-based mold release agent on the colored resin composition to bond the light absorption layer film Obtained.

<Example 2>
A light absorbing layer was produced in the same manner as in Example 1 except that the dye was changed to the following dye.
(Change before)
* C. I. Solvent Red 111 0.05 parts by weight (after change)
* C. I. Solvent Red 169 0.05 parts by weight

<Example 3>
A light absorbing layer was produced in the same manner as in Example 1 except that the dye was changed to the following dye.
(Change before)
* C. I. Solvent Blue 35 0.05 parts by weight (after change)
* C. I. Solvent Blue 36 0.05 parts by weight

<Comparative example>
(Reference Example A: Preparation of black pigment dispersion)
The following components were mixed and sufficiently dispersed using a paint shaker to prepare a black pigment dispersion.
* Black pigment (Mitsubishi Chemical Corporation # 2600) 20 parts by weight * Polymer dispersion (Big Chemie Japan Co., Ltd.)
Disperbyk 111 16 parts by weight * solvent (diethylene glycol dimethyl ether) 64 parts by weight The average particle size of the obtained black pigment dispersion was 250 nm.

Similarly, the following components were mixed and dispersed to prepare each color pigment dispersion.
(Reference Example B: Preparation of blue pigment dispersion)
* C. I. Pigment Blue 15: 6 7 parts by weight * Polysulfonic acid type polymer dispersant 4 parts by weight * Propylene glycol monomethyl ether acetate 89 parts by weight The average particle size of the obtained blue pigment dispersion was 170 nm.

(Reference Example C: Preparation of purple pigment dispersion)
* C. I. Pigment Violet 23 7 parts by weight * Polysulfonic acid type polymer dispersant 4 parts by weight * Propylene glycol monomethyl ether acetate 89 parts by weight The average particle size of the obtained purple pigment dispersion was 230 nm.

(Reference Example D: Preparation of green pigment dispersion)
* C. I. Pigment Green 58 7 parts by weight * Polysulfonic acid type polymer dispersant 4 parts by weight * Propylene glycol monomethyl ether acetate 89 parts by weight The average particle size of the obtained green pigment dispersion was 120 nm.

(Adjustment of the curable resin composition A contained in the comparative example)
A four-necked colben is charged with 63 parts by weight of methyl methacrylate, 12 parts by weight of acrylic acid, 6 parts by weight of 2-hydroxyethyl methacrylate, and 88 parts by weight of diethylene glycol dimethyl ether. 7 parts by weight of '-azobis (2-methylbutyronitrile) was added and dissolved uniformly.
Then, it stirred at 85 degreeC under nitrogen stream for 2 hours, and also was made to react at 100 degreeC for 1 hour.
7 parts by weight of glycidyl methacrylate, 0.4 parts by weight of triethylamine, and 0.2 parts by weight of hydroquinone were further added to the obtained solution, and the mixture was stirred at 100 ° C. for 5 hours to obtain a copolymer resin solution (solid content 50 %).
Next, the following materials were stirred and mixed at room temperature to obtain a curable resin composition.
* Copolymer resin solution (solid content 50%) 16 parts by weight * Dipentaerythritol pentaacrylate (Sartomer)
SR399) 24 parts by weight * Orthocresol novolac type epoxy resin (Oilized Shell Epoxy Co., Ltd.)
Epicoat 180S70) 4 parts by weight * 2-Methyl-1- (4-methylthiophenyl) -2-morpholinopropane-
1-one 4 parts by weight * Diethylene glycol dimethyl ether 52 parts by weight

Next, the following amount of components were sufficiently mixed to obtain a curable resin composition for forming a light absorption layer as a comparative example.
* 0.29 parts by weight of the black pigment dispersion * 0.1 part by weight of the blue dispersion * 0.005 parts by weight of the purple dispersion * 0.005 parts by weight of the green dispersion * Curable resin composition A 19. 8 parts by weight * 80 parts by weight of diethylene glycol dimethyl ether

  The curable resin composition is applied onto a glass substrate with a spin coater, dried at 100 ° C. for 3 minutes, then exposed to a 2.0 kW ultra-high pressure mercury lamp, and the substrate is left at 230 ° C. for 30 minutes. Thus, a light absorption layer was prepared.

<Evaluation>
The light-absorbing layer of Examples 1-3 and Comparative Examples, the measurement of the haze value, and for the transmission curve of the wavelength range of 380 nm to 780 nm, black panel temperature 63 ° C., carbon arc light resistance test in which the irradiance 500 W / ^{m 2} The increase in luminous transmittance before and after the treatment for 100 hours was measured.
The test piece for evaluation peels off the release-treated PET film on one side of the light absorption layer film, and after bonding to an 80 μm-thick triacetylcellulose film, the peeled-off PET film on the opposite side is peeled off. What was bonded to a 1 mm glass plate was prepared as a test piece.
The haze value was measured using a haze meter TC-HIIIDPK (manufactured by Tokyo Denshoku).
The transmittance was measured using UV-3150 (trade name, spectrophotometer, Shimadzu Corporation).

(Visibility evaluation)
The test piece was observed by visual observation and evaluated according to the following index.
○: No cloudiness is seen when the test piece is visually recognized.
X: Appears cloudy when the specimen is viewed.

<Evaluation results>

(Light resistance evaluation)
When an organic EL device provided with the light absorption layers of Examples 1 to 3 was experimentally prepared and continuously irradiated for 200 hours in a carbon arc light resistance test with an irradiation illuminance of 500 W / m ² at room temperature, the organic EL device It was confirmed whether or not the color reproduction rate was reduced when visually observing. As a result, in any of Examples 1 to 3, the display was seen before and after the carbon arc irradiation, and no discoloration was observed in the display.

(Transmittance evaluation)
The average transmittance at each wavelength in Example 1 was measured. As a result of measurement, the average transmittance at 400 to 430 nm was 50.3%, the average transmittance at 530 to 580 nm was 54.2%, and the average transmittance at 630 to 660 was 46.6%.
The transmittance was measured using UV-3150 (trade name, spectrophotometer, Shimadzu Corporation).

  The light absorption layer characterized by including the carbon black dispersion material, the dye, and the antioxidant described in Examples 1 to 3 has a low haze value, and is visually white compared with the comparative example. It was found that the visibility was not high and the industrial value was high.

DESCRIPTION OF SYMBOLS 1 Base material, 2 Light emitting layer, 3R colored layer (red), 3G colored layer (green), 3B colored layer (blue), 3W colored layer (white), 4 light absorption layer, 5 outer layer part, 6 insulating resin layer , 7 Black matrix, 8 Transparent substrate

Claims (12)

  In a white light source type organic EL display color filter forming substrate having a transparent substrate and red, green, blue, and white colored layers on the transparent substrate, 400 nm to 700 nm in a region between the light emitting layer and the outer layer portion. A light absorption layer having a transmittance in the range of 15 to 80%, wherein the light absorption layer contains a carbon black pigment and a dye as a colorant, and the light absorption layer The adhesive composition for light absorption layers characterized by having a haze value of 1.0 or less.   The pressure-sensitive adhesive composition for a light absorption layer according to claim 1, wherein the carbon black pigment contained in the light absorption layer has an average particle size of 100 nm or less. The color material contained in the light absorption layer has a transmittance increase of 5% or less in a carbon arc light resistance test of 100 hours at a black panel temperature of 63 ° C. and an irradiation illuminance of 500 W / m ^2. The adhesive composition for light absorption layers as described in any one of -2.   Three transmissions with a transmittance of 150 to 60% in the wavelength region of 400 to 430 nm, a transmittance of 40 to 60% in the wavelength region of 530 to 580 nm, and a transmittance of 35 to 60% in the wavelength region of 630 to 660 nm The pressure-sensitive adhesive composition for a light-absorbing layer according to any one of claims 1 to 3, which satisfies at least two of the rate requirements.   The pressure-sensitive adhesive composition for a light absorption layer according to any one of claims 1 to 4, wherein the carbon black has a cumulative 50% particle size of 30 to 60 nm.   The pressure-sensitive adhesive composition for a light-absorbing layer according to any one of claims 1 to 5, having a haze value of 0.5 or less.   The pressure-sensitive adhesive composition for a light absorbing layer according to any one of claims 1 to 6, wherein the dye is an anthraquinone dye or an anthrapyridone dye.   Furthermore, the adhesive composition for light absorption layers as described in any one of Claims 1-7 containing an acrylic resin copolymer.   The pressure-sensitive adhesive composition for a light-absorbing layer according to claim 8, wherein the acrylic resin copolymer has a weight average molecular weight of 800,000 to 2,000,000.   Hardened | cured material obtained by hardening | curing the adhesive composition for light absorption layers as described in any one of Claims 1-9.   The sheet | seat containing the light absorption layer characterized by including the adhesive composition for light absorption layers as described in any one of Claims 1-9.   An organic EL display device comprising the cured product according to claim 10 or the sheet according to claim 11 as a light absorption layer.