JP2010210924A - Color filter, and organic el display device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color filter for reducing the manufacturing process of the color filter and sharply improving the productivity, and an organic EL (Electro-Luminescence) display device using the color filter. <P>SOLUTION: The color filter for the organic EL display device has three-color light emitting layer. This color filter includes a colored layer of one color (A) selected from red, green and blue, and a colored layer of one color (B) selected from yellow, magenta and cyanogen. The color (A) and color (B) have a complementary color relation. The organic EL display device uses the color filter. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a color filter used in an organic EL (organic electroluminescence) display device having a three-color light emitting layer and an organic EL display device using the color filter.

In recent years, in addition to conventional liquid crystal display devices, organic EL display devices have been developed, and their applications are being expanded to portable information terminal devices such as mobile phones, car audio, television monitors, and personal computers.
However, in the organic EL display device, there is a problem that external light incident from the viewer side is reflected inside the organic EL display device, and the reflected light is emitted again to the viewer side, thereby making it difficult to visually recognize the display. It was.
In order to solve this problem, a technique for arranging a circularly polarizing plate on the outside of a glass substrate or the like in an organic EL device has been proposed (see, for example, Patent Documents 1 to 4). The external light incident on this circularly polarizing plate is absorbed by the circularly polarizing plate, ensuring the visibility of the display of the organic EL device.
In order to improve the reflection of external light, a technique has been proposed in which a color filter having three colored layers of red, green, and blue corresponding to the three-color light emitting layer is arranged. Various improvements have been made to color filters (see, for example, Patent Documents 5 to 6).

When a color filter having a colored layer of three colors of red, green, and blue is arranged in the organic EL display device so as to correspond to each light emitting layer of the three color light emitting layers, not only external light reflection is reduced, The effect of increasing the displayed color purity can also be achieved.
However, in order to produce a color filter having three colored layers, it is necessary to provide a colored layer for each of the three colors, so that the process becomes complicated and the productivity is low.

Japanese Patent Laid-Open No. 2001-76865 JP 2002-311239 A JP 2006-18187 A JP 2006-228675 A JP 2007-280718 A JP 2007-213824 A

  Under such circumstances, the present invention has an object to provide a color filter that can dramatically improve productivity by reducing the manufacturing process of the color filter and an organic EL display device using the color filter. Is.

As a result of intensive studies in order to achieve the above-mentioned problems, the present inventor succeeded in converting the three colored layers of the color filter into two colors, and reached the present invention.
That is, the present invention
[1] A color filter for an organic EL display device having a three-color light emitting layer, which is a colored layer composed of one color (A) selected from red, green and blue, and one color selected from yellow, magenta and cyan ( A color layer formed of B), and color (A) and color (B) are complementary to each other,
[2] The color filter according to the above [1], wherein a green color layer is formed in a portion corresponding to green of the color filter, and a magenta color layer is formed in portions corresponding to red and blue,
[3] A magenta colored composition for forming a magenta colored layer is a C.I. I. Pigment red 81, C.I. I. Pigment red 81: 1, C.I. I. Pigment red 83, C.I. I. Pigment red 122, C.I. I. Pigment red 209, C.I. I. Pigment bio red 19 and C.I. I. The color filter according to the above [1] or [2], comprising at least one pigment selected from CI Pigment Bio Red 23;
[4] The color filter as described in [1] above, wherein a blue colored layer is formed in a portion corresponding to blue of the color filter, and a yellow colored layer is formed in portions corresponding to red and green.
[5] The above [1] to [4], wherein the number of pixels constituting the colored layer consisting of color (B) is twice the number of pixels constituting the colored layer consisting of color (A) An organic EL display device using the color filter according to any one of the above and [6] the color filter according to any one of [1] to [5].

  According to the present invention, it is possible to dramatically improve productivity by reducing the manufacturing process of the color filter. Moreover, since the organic EL display device of the present invention does not need to use a circularly polarizing plate, the organic EL display device can be provided at low cost.

It is a schematic plan view which shows an example of the color filter for organic electroluminescent displays of this invention. It is a schematic sectional drawing which shows the 1st aspect of the organic electroluminescence display which mounts the color filter for organic electroluminescence displays of this invention. It is a schematic sectional drawing which shows the 2nd aspect of the organic electroluminescence display which mounts the color filter for organic electroluminescence displays of this invention. It is a schematic sectional drawing which shows the 3rd aspect of the organic electroluminescence display which mounts the color filter for organic electroluminescence displays of this invention.

A. Color filter for organic EL display device The color filter of the present invention is a color filter for an organic EL display device having a three-color light emitting layer, and a colored layer comprising one color (A) selected from red, green and blue, A colored layer composed of one color (B) selected from yellow, magenta and cyan is formed, and the color (A) and the color (B) are complementary to each other. Here, the complementary color relationship means that a combination of two colors is in a relationship that is located in the opposite direction in a color circle.

Hereinafter, the color filter for organic EL display devices of the present invention will be described with reference to the drawings. FIG. 1 is a schematic plan view showing an example of a color filter for an organic EL display device of the present invention.
In FIG. 1, a color filter 10 for an organic EL display device according to the present invention has a complementary color relationship with pixels constituting a colored layer 13a composed of one color (A) selected from red, green and blue, and color (A). The pixels constituting the colored layer 13b made of the color (B) are arranged in correspondence with the three-color light emitting layers at a ratio of the number of pixels of 1: 2.
The individual pixels of the colored layers 13a and 13b are divided for each pattern of the colored layer by the light shielding portion 12. The light-shielding portion 12 is provided in order to partition the light emitting area for each pixel, prevent reflection of external light at the boundary between the light emitting areas, and increase the contrast of the image. The visibility of the display is also improved by the presence of the light shielding portion 12. In FIG. 1, the light shielding portion 12 is continuous in the vertical direction, but may be continuous in the horizontal direction, or may be formed discontinuously for each colored layer pattern of the colored layers 13a and 13b. good. The pattern of the light shielding portion 12 is usually linear, and examples thereof include a matrix shape and a stripe shape.

  FIG. 2 is a schematic cross-sectional view showing a first embodiment of an organic EL display device equipped with the color filter for organic EL display devices of the present invention. As illustrated in FIG. 2, the color filter 10 for an organic EL display device of the present invention is formed, for example, on a transparent substrate 11, a light shielding portion 12 formed on the transparent substrate 11 and having an opening, and formed in the opening. The colored layer 13a made of the colored (A) and the colored layer 13 made of the colored layer 13b made of the color (B) are included. In the present invention, it is preferable that the number of pixels constituting the colored layer 13b made of color (B) is twice the number of pixels constituting the colored layer made of color (A).

Specifically, (1) when the green color layer 13a is formed in the portion corresponding to the green color of the color filter and the magenta color layer 13b is formed in the portion corresponding to red and blue, or (2) the color filter Examples include a case where a blue colored layer 13a is formed in a portion corresponding to blue and a yellow colored layer 13b is formed in a portion corresponding to red and green. Green and magenta have a complementary color relationship, and blue and yellow have a complementary color relationship.
Here, the magenta colored layer 13b can efficiently absorb a visible light range of 500 nm to 580 nm (strongly visible to humans). When the magenta colored layer 13b is provided, it is possible to efficiently absorb the external light reflection component. Thereby, external light reflection can be reduced. In addition, since the magenta colored layer 13b formed in the red and blue portions of the color filter can be produced in one step, and there is no need to use a circularly polarizing plate, an organic EL display device is provided at a low cost. You can also The same effect can be obtained when the blue colored layer 13a and the yellow colored layer 13b are used.
The film thickness of the colored layer 13 is about 1.0 to 3.0 μm.

(1) Magenta Color Material According to a preferred embodiment of the present invention, the magenta color material can be used by mixing the following violet pigment single color or the following red pigment, blue pigment, dye and the like. Examples of violet pigments include C.I. I. Pigment violet 1, C.I. I. Pigment violet 19, C.I. I. Pigment violet 23, C.I. I. Pigment violet 29, C.I. I. Pigment violet 32, C.I. I. Pigment violet 36, C.I. I. Pigment violet 38 and the like. Examples of red pigments include C.I. I. Pigment red 81, C.I. I. Pigment red 81: 1, C.I. I. Pigment red 83, C.I. I. Pigment red 122, C.I. I. Pigment red 149, C.I. I. Pigment red 177, C.I. I. Pigment red 208, C.I. I. Pigment red 209, C.I. I. Pigment red 224, C.I. I. Pigment red 242, C.I. I. Pigment red 254, C.I. I. And CI Pigment Red 264. Examples of blue pigments include C.I. I. Pigment blue 1, C.I. I. Pigment blue 15, C.I. I. Pigment blue 15: 1, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4, C.I. I. Pigment blue 15: 6, C.I. I. And CI Pigment Blue 60.

(2) Magenta colored composition According to a preferred embodiment of the present invention, the magenta colored composition for forming the colored layer of the color filter is a dispersion in which the above pigment is dispersed in a solvent. The magenta coloring composition for forming the magenta colored layer according to the present invention includes C.I. I. Pigment red 81: 1, C.I. I. Pigment red 83, C.I. I. Pigment red 122, C.I. I. Pigment red 209, C.I. I. Pigment bio red 19 and C.I. I. It is preferable to include at least one pigment selected from CI Pigment Bio Red 23.
In the present invention, the method for dispersing the pigment is not particularly limited, and the pigment can be dispersed using a known disperser. Examples of the dispersing machine for performing the dispersion treatment include roll mills such as two rolls and three rolls, ball mills such as a vibration ball mill, bead mills such as a paint conditioner, a continuous disk type bead mill, and a continuous annular type bead mill. The diameter of the beads used in the dispersion treatment is preferably 0.03 to 2.00 mm, more preferably 0.10 to 1.00 mm.

  In the present invention, when dispersing the pigment, it is preferable to add zirconia beads or the like as appropriate and perform dispersion for several hours using a paint shaker (manufactured by Asada Steel Corporation) or the like. For example, after dispersion for 1 hour with a relatively large bead diameter of 2 mm zirconia beads, it may be further dispersed for 2 hours with a relatively small bead diameter of 0.1 mm zirconia beads. Moreover, it is preferable to filter with a 5.0 μm membrane filter after dispersion. Thereby, the dispersibility of a pigment can be improved more and the transmittance | permeability can be improved more.

(A) Other components According to a preferred embodiment of the present invention, the magenta coloring composition may contain a solvent, a dispersant, a monomer, an oligomer, a polymer, a polymerization initiator, and a polymerization inhibitor, as necessary, in addition to the above-described pigment. An agent etc. are included suitably.

(I) Solvent Examples of the solvent include alcohols such as methanol, ethanol, n-propanol, isopropanol, ethylene glycol and propylene glycol, terpenes such as α- or β-terpineol, acetone, methyl ethyl ketone, cyclohexanone, Ketones such as N-methyl-2-pyrrolidone, aromatic hydrocarbons such as toluene, xylene, tetramethylbenzene, cellosolve, methyl cellosolve, ethyl cellosolve, carbitol, methyl carbitol, ethyl carbitol, butyl carbitol, Propylene glycol monomethyl ether, propylene glycol monoethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, triethylene glycol monomethyl Glycol ethers such as tilether, triethylene glycol monoethyl ether, ethyl acetate, butyl acetate, cellosolve acetate, ethyl cellosolve acetate, butyl cellosolve acetate, carbitol acetate, ethyl carbitol acetate, butyl carbitol acetate, propylene glycol monomethyl ether acetate, Examples thereof include propylene glycol monoethyl ether acetate and acetates such as 3-methoxybutyl acetate. In the present invention, commercially available solvents can also be used, for example, propylene glycol monomethyl ether acetate (Daicel Chemical Industries, Ltd.), propylene glycol monoethyl ether (Daicel Chemical Industries, Ltd.), and 3-methoxybutyl acetate. (Daicel Chemical Industries, Ltd.) is preferable. In a preferable aspect, content of a solvent is 10-90 mass% with respect to the total mass of a red coloring composition. If the content of the solvent is about the above range, the viscosity of the magenta coloring composition can be adjusted to a desired range, and pigment dispersibility and pigment dispersion aging stability can be improved. Further, since the pigment concentration can be within a certain range, the target chromaticity coordinates can be achieved after preparing the magenta coloring composition.

(Ii) Dispersant As the above-described dispersant, for example, cationic, anionic, nonionic, amphoteric, silicone-based, fluorine-based surfactants can be used. It is preferable to use a molecular dispersant. Examples of the polymer surfactant include polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene alkyl ethers such as polyoxyethylene oleyl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene nonyl phenyl ether, and the like. And polyoxyethylene alkyl phenyl ethers, polyethylene glycol diesters such as polyethylene glycol dilaurate and polyethylene glycol distearate, sorbitan fatty acid esters, fatty acid-modified polyesters, and tertiary amine-modified polyurethanes. In the present invention, commercially available dispersants can also be used. For example, various Solsperse dispersants such as Solsperse 3000, 5000, 9000, 12000, 13240, 13940, 17000, 20000, 24000, 26000, and 28000 (Zeneca Corporation). And Disperbyk 111 (manufactured by Big Chemie Japan Co., Ltd.) are preferable. In a preferred embodiment, the content of the dispersant is 10 to 80% by mass with respect to the total mass of the magenta pigment such as a red pigment.

(Iii) Monomer and oligomer Examples of the monomer and oligomer include methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, sec-butyl acrylate, sec. -Butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, n-pentyl acrylate, n-pentyl methacrylate, n-hexyl acrylate, n-hexyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, n-octyl acrylate, n-octyl methacrylate n-decyl acrylate, n-decyl methacrylate, 2-hydroxyethyl methacrylate, benzyl methacrylate, allyl acrylate, benzyl acrylate, butoxyethyl acrylate, butoxyethylene glycol acrylate, cyclohexyl acrylate, dicyclopentanyl acrylate, glycerol acrylate, glycidyl acrylate, glycidyl Methacrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, isobornyl acrylate, isodexyl acrylate, isooctyl acrylate, lauryl acrylate, 2-methoxyethyl acrylate, methoxyethylene glycol acrylate, phenoxyethyl acrylate, stearyl acrylate, Ethylene glycol Diacrylate, diethylene glycol diacrylate, 1,4-butanediol diacrylate, 1,5-pentanediol diacrylate, 1,6-hexanediol diacrylate, 1,3-propanediol acrylate, 1,4-cyclohexanediol diacrylate 2,2-dimethylolpropane diacrylate, glycerol diacrylate, tripropylene glycol diacrylate, glycerol triacrylate, trimethylolpropane triacrylate, polyoxyethylated trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate , Triethylene glycol diacrylate, polyoxypropyltrimethylolpropane triacrelane Butylene glycol diacrylate, 1,2,4-butanetriol triacrylate, 2,2,4-trimethyl-1,3-pentanediol diacrylate, diallyl fumarate, 1,10-decanediol dimethyl acrylate, dipenta Erythritol hexaacrylate, dipentaerythritol pentaacrylate, and those obtained by replacing the above acrylate groups with methacrylate groups, γ-methacryloxypropyltrimethoxysilane, 1-vinyl-2-pyrrolidone, 2-hydroxyethylacryloyl phosphate, tetrahydrofulfree Acrylate, dicyclopentenyl acrylate, dicyclopentenyloxyethyl acrylate, 3-butanediol diacrylate, neopentyl glycol diacrylate, poly Tylene glycol diacrylate, hydroxypivalate ester neopentyl glycol diacrylate, phenol-ethylene oxide modified acrylate, phenol-propylene oxide modified acrylate, bisphenol A-ethylene oxide modified diacrylate, pentaerythritol diacrylate monostearate, tetraethylene glycol di Acrylate, polypropylene glycol diacrylate, trimethylolpropane propylene oxide modified triacrylate, isocyanuric acid ethylene oxide modified triacrylate, trimethylolpropane ethylene oxide modified triacrylate, pentaerythritol pentaacrylate, pentaerythritol hexaacrylate, pentaerythritol te Acrylate monomers such as traacrylate, and those obtained by substituting these acrylate groups with methacrylate groups, styrene, α-methylstyrene, N-vinyl-2-pyrrolidone, acrylic acid, methacrylic acid, acrylic acid dimer, itaconic acid , Crotonic acid, maleic acid, fumaric acid, vinyl acetic acid, acid anhydrides of these organic acids, urethane acrylate oligomers in which an acrylate group is bonded to an oligomer having a polyurethane structure, and an acrylate group to an oligomer having a polyester structure Polyester acrylate oligomer, epoxy acrylate oligomer having acrylate group bonded to oligomer having epoxy group, urethane methacrylate having methacrylate group bonded to oligomer having polyurethane structure Oligomer, a polyester methacrylate oligomer conjugated methacrylate groups to the oligomer having a polyester structure, epoxy methacrylate oligomer conjugated methacrylate groups to the oligomer having an epoxy group.
In the present invention, commercially available monomers can also be used. For example, SR399 (manufactured by Sartomer), Aronix M-400 (manufactured by Toagosei Co., Ltd.), and Aronix M-450 (manufactured by Toagosei Co., Ltd.) are preferable. In a preferred embodiment, the monomer and / or oligomer content is 5 to 80% by mass relative to the total mass of the magenta pigment.

(Iv) Polymer Examples of the polymer include ethylene-vinyl acetate copolymer, ethylene-vinyl chloride copolymer, ethylene vinyl copolymer, polystyrene, acrylonitrile-styrene copolymer, ABS resin, and polymethacrylic acid resin. , Ethylene methacrylate resin, polyvinyl chloride resin, chlorinated vinyl chloride, polyvinyl alcohol, cellulose acetate propionate, cellulose acetate butyrate, nylon 6, nylon 66, nylon 12, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyvinyl acetal , Polyether ether ketone, polyether sulfone, polyphenylene sulfide, polyarylate, polyvinyl butyral, epoxy resin, phenoxy resin, polyimide resin , Polyamideimide resin, polyamic acid resin, polyetherimide resin, phenol resin, urea resin, epoxy acrylate resin having acrylate group, polyurethane methacrylate having methacrylate group, polyester methacrylate having methacrylate group, epoxy methacrylate resin having methacrylate group, etc. Is mentioned.
In the present invention, commercially available polymers can also be used. For example, Aronix M-5600 (manufactured by Toagosei Co., Ltd.), Aronix M-6200 (manufactured by Toagosei Co., Ltd.), Aronix M-7100 (manufactured by Toagosei Co., Ltd.) And Aronix M-9050 (manufactured by Toagosei Co., Ltd.) are preferable. In a preferred embodiment, the content of the polymer is 5 to 80% by mass with respect to the total mass of the magenta pigment.

(V) Polymerization initiator As the polymerization initiator, a thermal polymerization initiator and a photopolymerization initiator can be used. For example, benzyl (also called bibenzoyl), benzoin isobutyl ether, benzoin isopropyl ether, benzophenone, benzoyl Benzoic acid, methyl benzoylbenzoate, 4-benzoyl-4′-methyldiphenyl sulfide, benzylmethyl ketal, dimethylaminomethylbenzoate, 2-n-butoxyethyl-4-dimethylaminobenzoate, isoamyl p-dimethylaminobenzoate, 3 , 3′-dimethyl-4-methoxybenzophenone, methylobenzoyl formate, 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1 -(4-mol Olinophenyl) -butan-1-one, 1- (4-dodecylphenyl) -2hydroxy-2-methylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropane-1 -One, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 2-chlorothioxanthone, 2,4-diethylthioxanthone, 2,4-diisopropylthioxanthone, 2,4-dimethylthioxanthone , Isopropylthioxanthone, 1-chloro-4-propoxythioxanthone, and the like. In the present invention, a commercially available polymerization initiator can also be used. For example, Irgacure 184, Irgacure 369, Irgacure 651, Irgacure 907 (all are manufactured by Ciba Specialty Chemicals), Darocur (Merck), Ketone compounds such as Adeka 1717 (Asahi Denka Kogyo Co., Ltd.), and 2,2′-bis (o-chlorophenyl) -4,5,4′-tetraphenyl-1,2′-biimidazole (black gold chemical) Biimidazole compounds such as those manufactured by KK are preferred. In a preferred embodiment, the content of the polymerization initiator is 1 to 40% by mass with respect to the total mass of the magenta pigment.

(3) Yellow colored composition According to a preferred embodiment of the present invention, a yellow colored composition can be prepared in the same manner as the magenta colored composition. According to a preferred embodiment of the present invention, the yellow pigment preferably has a rising wavelength of the transmission spectrum of the pigment in the vicinity of 480 nm. Examples of the yellow pigment used in the yellow coloring composition include C.I. I. Pigment yellow 1, C.I. I. Pigment yellow 3, C.I. I. Pigment yellow 12, C.I. I. Pigment yellow 13, C.I. I. Pigment yellow 14, C.I. Pigment Yellow 15, C.I. I. Pigment yellow 16, C.I. I. Pigment yellow 17, C.I. I. Pigment yellow 20, C.I. I. Pigment yellow 24, C.I. I. Pigment yellow 31, C.I. I. Pigment yellow 55, C.I. I. Pigment yellow 60, C.I. I. Pigment yellow 61, C.I. I. Pigment yellow 65, C.I. I. Pigment yellow 71, C.I. I. Pigment yellow 73, C.I. I. Pigment yellow 74, C.I. I. Pigment yellow 81, C.I. I. Pigment yellow 83, C.I. I. Pigment yellow 93, C.I. I. Pigment yellow 95, C.I. I. Pigment yellow 97, C.I. I. Pigment yellow 98, C.I. I. Pigment yellow 100, C.I. I. Pigment yellow 101, C.I. I. Pigment yellow 104, C.I. I. Pigment yellow 106, C.I. I. Pigment yellow 108, C.I. I. Pigment yellow 109, C.I. I. Pigment yellow 110, C.I. I. Pigment yellow 113, C.I. I. Pigment yellow 114, C.I. I. Pigment yellow 116, C.I. I. Pigment yellow 117, C.I. I. Pigment yellow 119, C.I. I. Pigment yellow 120, C.I. I. Pigment yellow 126, C.I. I. Pigment yellow 127, C.I. I. Pigment yellow 128, C.I. I. Pigment yellow 129, C.I. I. Pigment yellow 138, C.I. I. Pigment yellow 139, C.I. I. Pigment yellow 150, C.I. I. Pigment yellow 151, C.I. I. Pigment yellow 152, C.I. I. Pigment yellow 153, C.I. I. Pigment yellow 154, C.I. I. Pigment yellow 155, C.I. I. Pigment yellow 156, C.I. I. Pigment yellow 166, C.I. I. Pigment yellow 168, C.I. I. In the same manner as the magenta coloring composition, the yellow coloring composition may contain the above-described solvent, dispersant, monomer, oligomer, polymer, polymerization initiator, polymerization inhibitor, and the like as necessary. It is included as appropriate.

(4) Green coloring composition and blue coloring composition According to a preferred embodiment of the present invention, the green coloring composition and the blue coloring composition can be prepared in the same manner as the magenta coloring composition. Examples of the green pigment used in the green coloring composition include C.I. I. Pigment green 7, C.I. I. Pigment green 36, C.I. I. Pigment green 1, C.I. I. Pigment Green 4 and C.I. I. And CI Pigment Green 58. In the green coloring composition, a yellow pigment can be further mixed with at least one of these green pigments. Examples of the blue pigment used in the blue coloring composition include C.I. I. Pigment blue 1, C.I. I. Pigment blue 15: 1, C.I. I. Pigment blue 15: 2, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4, C.I. I. Pigment blue 15: 5, C.I. I. Pigment blue 15: 6, C.I. I. Pigment blue 1 and C.I. I. Pigment blue 62, C.I. I. And CI Pigment Blue 60. In the blue coloring composition, a purple pigment can be further mixed with at least one of these blue pigments.
Similarly to the magenta coloring composition, the green coloring composition and the blue coloring composition appropriately include the above-described solvent, dispersant, monomer, oligomer, polymer, polymerization initiator, polymerization inhibitor, and the like as necessary.

  The manufacturing method of the color filter of this invention is not specifically limited, A well-known method can be used. For example, it can be carried out according to the preferred embodiment shown below. First, the above colored composition is applied onto a substrate, dried under reduced pressure, and pre-baked to remove the solvent. For the application of the composition, conventionally known methods can be used, such as spin coating, printing, ink jet, bar coating, spraying, die coating, bead coating, and slit & spin coating. It is done. Subsequently, UV light is exposed to cure the composition. Furthermore, the pattern of a colored layer can be formed on a base material by baking.

(5) Transparent substrate The transparent substrate 11 used in the color filter for an organic EL display device of the present invention can be the same as that used in a general color filter. Specific examples include inflexible transparent rigid materials such as quartz glass, alkali-free glass, and synthetic quartz plates, or transparent flexible materials having flexibility such as transparent resin films and optical resin plates. It is done.
Although the thickness of the transparent substrate 11 is not specifically limited, For example, the thing of about 100 micrometers-1 mm can be used according to the use of the color filter of this invention.

(6) Light-shielding part The color filter for organic EL display device of the present invention may have a light-shielding part 12, and as a material for forming the light-shielding part 12, for example, a black colorant such as carbon black or titanium black is used. Examples thereof include a resin composition. As the resin used in this resin composition, for example, a photosensitive resin having a reactive vinyl group such as an acrylate, methacrylate, polyvinyl cinnamate, or cyclized rubber can be used. Examples of the resin include polymethyl methacrylate resin, polyacrylate resin, polycarbonate resin, polyvinyl alcohol resin, polyvinyl pyrrolidone resin, hydroxyethyl cellulose resin, carboxymethyl cellulose resin, polyvinyl chloride resin, melamine resin, phenol resin, alkyd resin, Epoxy resins, polyurethane resins, polyester resins, maleic acid resins, polyamide resins and the like can also be exemplified.

  Moreover, as a forming material of the light-shielding part 12, metal oxides, such as metals, such as chromium, or chromium oxide can be mentioned, for example. Such a light-shielding portion 12 may be, for example, a CrOx film (x is an arbitrary number) and a laminate of two Cr films, or a CrOx film (x is an arbitrary number) with a further reduced reflectance. 3), a CrNy film (y is an arbitrary number) and a Cr film may be laminated.

  Examples of the method for forming the light shielding portion 12 include a photolithography method in the case of using the resin composition containing the photosensitive resin, and an ink jet in the case of using the resin composition containing the other resin. Method, printing method and the like. Under the present circumstances, after apply | coating the said resin composition and forming a coating film, you may dry this coating film. Examples of the method for drying the coating film include heat drying using a hot plate. As heat drying conditions, it is preferable to heat at 60 to 150 ° C. for 1 to 10 minutes. Further, heat treatment may be performed after development by a photolithography method. As heat treatment conditions, heating is generally performed at 150 to 300 ° C. for 20 to 60 minutes.

  In addition, when the metal or metal oxide is used, examples of the method for forming the light shielding portion include a method of forming a thin film by a vacuum deposition method, an ion plating method, a sputtering method, and the like, and patterning using a photolithography method. be able to. Further, an electroless plating method or the like can also be used.

  The film thickness of the light shielding part is about 0.5 to 2 μm when the above resin composition is used, and is about 0.2 to 0.4 μm when a metal or metal oxide is used.

(7) Overcoat layer The color filter 10 for an organic EL display device of the present invention may further include an overcoat layer 14 formed so as to cover the colored layer 13.
As a material for forming the overcoat layer 14, a transparent resin can be used. Examples of the transparent resin include photo-curing resins and thermosetting resins having an acrylate-based or methacrylate-based reactive vinyl group. Examples of the transparent resin include polymethyl methacrylate, polyacrylate, polycarbonate, polyvinyl alcohol, polyvinyl pyrrolidone, hydroxyethyl cellulose, carboxymethyl cellulose, polyvinyl chloride resin, melamine resin, phenol resin, alkyd resin, epoxy resin, polyurethane resin, Examples thereof include a polyester resin, a maleic acid resin, and a polyamide resin.
The film thickness of the overcoat layer 14 is about 1.0 to 2.5 μm.

  As a method for forming the overcoat layer 14, a coating liquid for forming an overcoat layer containing the above-described transparent resin is applied by a method such as spin coating, roll coating, cast coating, etc., and a photocurable resin is formed. In the case of (2), a method of thermally curing as necessary after ultraviolet irradiation, and in the case of a thermosetting resin, a method of directly curing after film formation can be mentioned. Moreover, when the above-mentioned transparent resin is shape | molded by the film form, an overcoat layer can be formed by sticking directly or via an adhesive.

B. Organic EL Display Device Next, the organic EL display device of the present invention will be described. The organic EL display device of the present invention has an organic EL element including a three-color light-emitting layer, and uses light from the three-color light-emitting layer as a light source. More specifically, the organic EL display device of the present invention includes an organic EL layer including a three-color light emitting layer, an organic EL element including a transparent electrode layer and a back electrode layer sandwiching the organic EL layer, and red and green And a colored layer composed of one color (A) selected from blue, and a colored layer composed of one color (B) selected from yellow, magenta and cyan, specifically, a portion corresponding to green of the color filter is colored green. A color filter in which a layer pattern is formed and a magenta colored layer pattern is formed in a portion corresponding to red and blue, or a blue colored layer pattern is formed in a portion corresponding to blue in the color filter, and red and green A color filter in which a pattern of a yellow colored layer is formed in a portion corresponding to. An organic EL display device using three-color light from the three-color light emitting layer as a light source.
In the organic EL display device, when the color (A) of the color filter is green and the color (B) is magenta, the green light emitting layer of the organic EL display device corresponds to the green colored layer, and the red and blue light emitting layers are magenta colored. The colored layers 13a and 13b are arranged so as to correspond to the layers. Moreover, when the color (A) of the color filter for organic EL display devices is blue and the color (B) is yellow, the blue light emitting layer of the organic EL display device corresponds to the blue colored layer, and the red and green light emitting layers are yellow. Colored layers 13a and 13b are arranged so as to correspond to the colored layers. By arranging the colored layers 13a and 13b as described above, the function of a color filter that allows only light of a specific wavelength to pass through and displays it as “color” is suitably exhibited.
This organic EL display device is sealed with a sealant as necessary.

1. First Embodiment As a specific example of such an organic EL display device, the one exemplified in FIG. The organic EL element side substrate 20 illustrated in FIG. 2 will be described. As shown in FIG. 2, the back electrode layer 22 is disposed on the substrate 21, the organic EL layer 23 is disposed on the back electrode layer 22, and the transparent electrode layer 24 is disposed on the organic EL layer 23. ing. Each of the pair of organic EL layers 23 and the back electrode layer 22 is partitioned by an insulating layer 26 to form the organic EL element side substrate 20. Specific examples of the arrangement of the organic EL element side substrate 20 include, for example, a transparent electrode layer 24 formed in a stripe shape, and a stripe shape on the transparent electrode layer 24 so as to intersect with the stripe pattern of the transparent electrode layer 24. The organic EL layer 23 formed on the organic EL layer 23, the back electrode layer 22 formed in a stripe shape on the organic EL layer 23 in the same manner as the stripe pattern of the organic EL layer 23, and the light shielding portion 12 on the stripe shape The case where it has the insulating layer 26 formed in the matrix form like the matrix pattern of the light shielding part 12 in the opening part of the transparent electrode layer 24 and the back electrode layer 22 is mentioned. The edge of the pattern of the insulating layer 26 is preferably arranged on the inner side of the edge of the pattern of the light shielding portion 12.

  2, the overcoat layer 14 of the color filter 10 and the transparent electrode layer 24 face each other, and the colored layer 13 of the color filter 10 and the organic EL layer 23 of the organic EL element side substrate 20 face each other. It is the aspect arrange | positioned. In this aspect, the color filter 10 and the organic EL element side substrate 20 are separated from each other, and as a manufacturing method, for example, the periphery of the organic EL element side substrate 20 and the organic EL display device color filter 10 in an inert gas. A method of sealing the portion with the sealing agent 27 can be mentioned. As a method of forming the organic EL element side substrate 20, a method generally used for manufacturing an organic EL display device can be used.

2. Second Aspect Next, a second aspect of the organic EL display device of the present invention will be described. FIG. 3 is a schematic cross-sectional view showing a second embodiment of an organic EL display device equipped with the color filter for organic EL display devices of the present invention.
The organic EL display device according to this aspect is for an organic EL display device having a transparent substrate 11, a light shielding portion 12 having an opening, and a colored layer 13 according to the present invention formed in the opening. In this embodiment, the color filter 10 and the organic EL element 25 directly formed on the color filter 10 for an organic EL display device are included. Here, “directly formed on the color filter 10 for the organic EL display device” means that the color filter 10 for the organic EL display device is used as a support. Therefore, as long as the color filter 10 for organic EL display devices is used as a support, another member may be provided between the color filter 10 for organic EL display devices and the organic EL element 25. The organic EL element 25 has an organic EL layer 23 including a three-color light emitting layer, as in the first embodiment, and the organic EL display device 30 is provided at the openings of the back electrode layer 22 and the organic EL layer 23. The organic EL element side substrate 20 is composed of the formed insulating layer 26 and transparent electrode layer 24.

  The organic EL display device 30 of the present invention is provided between the surface of the color filter 10 for the organic EL display device (in this embodiment, the overcoat layer 14) and the transparent electrode layer 24 of the organic EL element 25 as necessary. It may have an anchor layer. This anchor layer is provided to improve the adhesion between the color filter 10 for an organic EL display device and the transparent electrode layer 24.

  In the organic EL display device 30 of the present invention, a barrier layer may be formed between the organic EL display device color filter 10 and the transparent electrode layer 24 as necessary. When the overcoat layer 14 is formed, the barrier layer is formed between the overcoat layer 14 and the transparent electrode layer 24. This barrier layer is provided in order to block water vapor and oxygen from reaching the organic EL layer 23. In this embodiment, a barrier layer may be formed instead of the anchor layer, and both the anchor layer and the barrier layer may be formed.

  As a method for forming the organic EL element 25 of this embodiment, any method can be used as long as the organic EL element 25 can be stacked with good adhesion, and a general method for manufacturing an organic EL display device can be used. Specifically, a color filter 10 for an organic EL display device is prepared, a transparent electrode layer 24 is formed on the overcoat layer 14 of the color filter 10 for the organic EL display device by sputtering, and then insulated in a pattern. Layer 26 is formed. Thereafter, a method of manufacturing the organic EL display device 30 by forming the organic EL layer 23 including the three-color light emitting layer and the back electrode layer 22 in this order by using the insulating layer 26 as a mask is exemplified.

3. Third Aspect Next, a third aspect of the organic EL display device of the present invention will be described. FIG. 4 is a schematic cross-sectional view showing a third aspect of the organic EL display device on which the color filter for organic EL display device of the present invention is mounted.
As shown in FIG. 4, the organic EL display device 30 of this aspect includes a substrate 21, an organic EL element side substrate 20 having an organic EL element 25 and an insulating layer 26 formed on the substrate 21, and an organic EL element side substrate. 20 and a colored layer 13 directly formed on 20. Here, “directly formed on the organic EL element side substrate 20” means that the organic EL element side substrate 20 is formed as a support. Therefore, as long as the organic EL element side substrate 20 is used as a support, another member may be provided between the organic EL element side substrate 20 and the colored layer 13.
This embodiment will be described more specifically. The organic EL display device 30 of this embodiment is formed on the substrate 21, the organic EL element side substrate 20 having the organic EL element 25 and the insulating layer 26 formed on the substrate 21, and the organic EL element side substrate 20 as desired. In addition, the overcoat layer 14, the light-shielding portion 12 formed directly on the overcoat layer 14, and having an opening, and the colored layer (for example, a green colored layer) formed of the color (A) formed in the opening. And a colored layer 13 including a colored layer (for example, a magenta colored layer) 13b composed of 13a and a color (B). The organic EL element 25 includes an organic EL layer 23 including a three-color light emitting layer.

  Also in the organic EL display device 30 of this embodiment, the organic EL element side substrate 20 surface may be contacted with water vapor or oxygen by the overcoat layer 14 for the purpose of improving flatness or the organic EL element 25 as necessary. It may have a barrier layer for the purpose of suppression or an anchor layer formed on the transparent electrode layer 24 for the purpose of improving the adhesion between the transparent electrode layer 24 and other members.

  The manufacturing method of the organic EL display device 30 of this aspect is manufactured by the following method, for example. First, the overcoat layer 14 is formed on the organic EL element side substrate 20 formed by a generally used method. Next, a light shielding part forming coating solution is applied to form a light shielding part forming layer, and then exposed to a pattern to form the light shielding part 12 having an opening. Next, a colored layer 13 including a colored layer (for example, a green colored layer) 13 a made of color (A) and a colored layer (for example, a magenta colored layer) 13 b made of color (B) is formed by the same formation method as that for the light shielding portion 12. Then, the organic EL display device 30 is manufactured.

Hereinafter, each configuration of the organic EL display device 30 of the present invention will be described in detail.
(1) Organic EL Element Side Substrate The organic EL element side substrate 20 used in the present invention has at least a substrate 21 and an organic EL element 25, and usually has an insulating layer.

(A) Organic EL Element The organic EL element 25 in the present invention includes a three-color light emitting layer. More specifically, it usually includes an organic EL layer 23 including a three-color light emitting layer, and a back electrode layer 22 and a transparent electrode layer 24 disposed so as to sandwich the organic EL layer.

(I) Organic EL layer The organic EL layer 23 used in the present invention has at least a three-color light-emitting layer, and is usually composed of a plurality of organic layers, and includes a hole injection layer and an electron. It may have a charge transport layer such as a charge injection layer such as an injection layer, a hole transport layer that transports holes to the light emitting layer, and an electron transport layer that transports electrons to the light emitting layer.

a) Three-color light-emitting layer Specifically, as the three-color light-emitting layer used in the present invention, when a voltage is applied to the organic EL layer, at least blue light (430 nm to 470 nm), green light (470 nm to 470 nm) 600 nm) and an emission spectrum in the wavelength range of red light (600 nm to 700 nm) may be used.

  Examples of the method for forming the three-color light emitting layer include a vapor deposition method, a printing method, an ink jet method, a spin coating method, a casting method, a dipping method, a bar coating method, a blade coating method, a roll coating method, a gravure coating method, and flexographic printing. Method, spray coating method, and self-assembly method (alternate adsorption method, self-assembled monolayer method). In particular, an evaporation method, a spin coating method, and an ink jet method are preferably used.

b) Hole Injection Layer In the present invention, a hole injection layer may be formed between the three-color light emitting layer and the anode (transparent electrode layer or back electrode layer). This is because by providing the hole injection layer, the injection of holes into the three-color light emitting layer is stabilized, and the light emission efficiency can be increased.
The film thickness of the hole injection layer is usually about 5 nm to 1 μm.

  As a material for forming the hole injection layer used in the present invention, a material generally used for a hole injection layer of an organic EL element can be used. The material for forming the hole injection layer may be any material that has either a hole injection property or an electron barrier property.

  Specifically, the hole injection layer forming material includes triazole derivatives, oxadiazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives, pyrazolone derivatives, phenylenediamine derivatives, arylamine derivatives, amino-substituted chalcone derivatives, oxazoles. Examples thereof include conductive polymer oligomers such as derivatives, styrylanthracene derivatives, fluorenone derivatives, hydrazone derivatives, stilbene derivatives, silazane derivatives, polysilanes, aniline copolymers, and thiophene oligomers. Furthermore, examples of the material for forming the hole injection layer include porphyrin compounds, aromatic tertiary amine compounds, and styrylamine compounds.

c) Electron Injection Layer In the present invention, an electron injection layer may be formed between the three-color light emitting layer and the cathode (transparent electrode layer or back electrode layer). This is because by providing the electron injection layer, the injection of electrons into the three-color light-emitting layer is stabilized and the light emission efficiency can be increased.
The thickness of the electron injection layer is usually about 5 nm to 1 μm.

  As a material for forming the electron injection layer used in the present invention, for example, nitro-substituted fluorene derivatives, anthraquinodimethane derivatives, diphenylquinone derivatives, thiopyrandioxide derivatives, heterocyclic tetracarboxylic anhydrides such as naphthaleneperylene, carbodiimide, Fluorenylidenemethane derivatives, anthraquinodimethane and anthrone derivatives, oxadiazole derivatives, thiazole derivatives in which the oxygen atom of the oxadiazole ring of the oxadiazole derivative is replaced with a sulfur atom, quinoxaline ring known as an electron withdrawing group Examples thereof include quinoxaline derivatives having bismuth, metal complexes of 8-quinolinol derivatives such as tris (8-quinolinol) aluminum, phthalocyanines, metal phthalocyanines, and distyrylpyrazine derivatives.

(Ii) Back Electrode Layer The back electrode layer 22 in the present invention is disposed between the organic EL layer 23 and the substrate 21. The back electrode layer 22 forms the other electrode for causing the three-color light emitting layer to emit light, and is an electrode having a charge opposite to that of the transparent electrode layer 24.

Examples of the material for forming the back electrode layer 22 used in the present invention include metals, alloys, and mixtures thereof having a work function as small as about 4 eV or less. Specifically, sodium, sodium-potassium alloy, magnesium, lithium, magnesium / copper mixture, magnesium / silver mixture, magnesium / aluminum mixture, magnesium / indium mixture, aluminum / aluminum oxide (Al ₂ O ₃ ) mixture, indium, Examples include lithium / aluminum mixtures and rare earth metals. More preferably, a magnesium / silver mixture, a magnesium / aluminum mixture, a magnesium / indium mixture, an aluminum / aluminum oxide (Al ₂ O ₃ ) mixture, and a lithium / aluminum mixture can be mentioned.

The back electrode layer 22 preferably has a sheet resistance of several Ω / cm or less. Further, the film thickness of the back electrode layer 22 is usually about 10 nm to 1 μm.
As a method for forming the back electrode layer 22, for example, a method of forming a thin film by, for example, vapor deposition or sputtering and then patterning by photolithography is preferably used.

(Iii) Transparent Electrode Layer The transparent electrode layer 24 in the present invention is provided to apply voltage to the organic EL layer 23 sandwiched between the back electrode layer 22 and cause the three-color light emitting layer to emit light. It is. Further, the light generated in the three-color light emitting layer is transmitted to the color filter 10 side for the organic EL display device. Therefore, it is disposed between the organic EL layer 23 and the color filter 10 for an organic EL display device.

  Examples of the material for forming the transparent electrode layer 24 used in the present invention include a metal oxide having transparency and conductivity. Examples of such metal oxides include indium tin oxide (ITO), indium oxide, zinc oxide, and stannic oxide.

The film thickness of the transparent electrode layer 24 is usually about 100 nm to 300 nm.
As a method for forming the transparent electrode layer 24, for example, a method of patterning by a photolithography method after forming a thin film by a vapor deposition method or a sputtering method is preferably used.

(B) Substrate The substrate 21 used in the present invention may be any substrate as long as it can support the organic EL element 25 and the like, and those generally used for the organic EL display device 30 can be used.
In the present invention, since light is extracted from the color filter 10 side for the organic EL display device, the substrate 21 may be transparent or opaque.

(C) Insulating layer The insulating layer 26 in this invention is formed in order to prevent the back electrode layer 22 and the transparent electrode layer 24 from contacting directly.
As a material for forming the insulating layer 26 used in the present invention, for example, a photo-curable resin such as a photosensitive polyimide resin or an acrylic resin, a thermosetting resin, an inorganic material, or the like can be used.
The pattern of the insulating layer 26 is usually linear, and for example, a pattern having openings such as a matrix shape or a stripe shape is exemplified.
Examples of a method for forming the insulating layer 26 include a method in which the above material is applied and patterned by a photolithography method. Also, a printing method or the like can be used.

(2) Sealant The sealant 27 used as necessary in the present invention is formed on the peripheral portion of the organic EL display device color filter 10 and the organic EL element side substrate 20 and seals the organic EL element 25. is there.
As a constituent material of such a sealant 27, any material that can suppress the organic EL element 25 from being brought into contact with moisture in the atmosphere may be used, and it is generally used for the organic EL display device 30. Things can be used.

(3) Anchor layer Examples of the material for forming the anchor layer that is optionally used in the present invention include silicon oxide, silicon nitride, and silicon nitride oxide.
Examples of the method for forming the anchor layer include sputtering, ion plating, vacuum deposition such as electron beam (EB) deposition and resistance heating, laser ablation, and chemical vapor deposition (CVD). Can be mentioned. Among these, the sputtering method, the ion plating method, and the CVD method are preferably used from the viewpoint of productivity.
The thickness of the anchor layer is usually about 2 nm to 200 nm, preferably about 5 nm to 50 nm.

(4) Barrier layer The material for forming the barrier layer formed as desired in the present invention is not particularly limited as long as it can exhibit barrier properties against water vapor and oxygen. For example, a transparent inorganic film or a transparent resin film Alternatively, an organic-inorganic hybrid film or the like is used. Among these, a transparent inorganic film is preferable because of its high barrier property.
Examples of the material for forming the transparent inorganic film include oxides such as aluminum oxide, silicon oxide, and magnesium oxide; nitrides such as silicon nitride; nitride oxides such as silicon nitride oxide; In particular, silicon nitride oxide is preferable because pinholes and protrusions hardly occur and the gas barrier property is high.

The barrier layer may be a single layer or a multilayer. For example, when the barrier layer is a multilayer in which a plurality of silicon nitride oxide films are stacked, the barrier property can be further improved. Moreover, when a barrier layer is a multilayer, you may use a different material for each layer, respectively.
The thickness of the barrier layer varies depending on the transparent substrate to be used, the type of the barrier layer forming material, and whether the barrier layer is a single layer or a multilayer. It is about 5 nm to 5 μm. This is because if the thickness of the barrier layer is too thin, the barrier property may be insufficient, and if the thickness of the barrier layer is too thick, a phenomenon such as a crack due to the film stress of the thin film tends to occur.

  When the barrier layer is a transparent inorganic film, the method for forming the transparent inorganic film is not particularly limited as long as it is a film forming method that can be formed in a vacuum state. For example, a sputtering method, an ion plating method, Examples thereof include vacuum deposition methods such as electron beam (EB) deposition and resistance heating, atomic layer epitaxy (ALE), laser ablation, and chemical vapor deposition (CVD). Among these, the sputtering method, the ion plating method, and the CVD method are preferably used from the viewpoint of productivity.

Examples The present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
The color characteristics, external light reflection, luminance, and process reduction effect were evaluated according to the following methods.

<Color characteristics>
Visual evaluation was made based on the evaluation criteria.
A: Very good.
○: Good.
X: There was a problem.

<External light reflection>
Visual evaluation was performed based on the following evaluation criteria.
○: There was no problem.
X: There was a problem because of concern about reflected light.

<Luminance>
It measured using BM-8 of the luminance meter by Topcon Corporation, and evaluated based on the following evaluation criteria. The following values are the luminance ratios when the luminance of the element without the color filter and without the circularly polarizing plate (Comparative Example 2) is 100%.
A: Greater than 70%.
○: More than 50% and 70% or less.
Δ: 50% or less.

<Process reduction effect>
A: There is neither a color filter manufacturing process nor a circularly polarizing plate pasting process.
○: There is a step of attaching a circularly polarizing plate. There is no color filter manufacturing process.
○: There is a color filter manufacturing process. In addition, the colored filter manufacturing process of the color filter was changed from 3 processes to 2 processes, and 1 process could be reduced. There is no step of attaching a circularly polarizing plate.
X: There exists a color filter preparation process. In addition, the colored layer manufacturing process of a color filter is 3 processes, and the process has not been reduced.

Example 1
A light shielding part (thickness: 1.0 μm) made of carbon black-containing polymethyl methacrylate resin is formed on a 0.7 mm glass substrate (AN material manufactured by Asahi Glass Co., Ltd.) by photolithography as shown in FIG. The pixels constituting the layer (thickness 2.0 μm) and the pixels constituting the magenta colored layer (thickness 2.0 μm) are arranged in the ratio of the number of pixels of 1: 2 as shown in FIG. As shown in FIG. 4, a photocurable resin made of polymethyl methacrylate was applied by a spin coating method to form an overcoat layer (thickness: 1.5 μm), thereby producing a color filter. Using this color filter, an organic EL display device is used without a circularly polarizing plate so that the green colored layer corresponds to the green light emitting layer of the organic EL display device and the magenta colored layer corresponds to the red light emitting layer and the blue light emitting layer. Configured.
In addition, the compounding composition of each colored layer is shown in Table 1.

Example 2
A color filter was produced in the same manner as in Example 1 except that the green colored layer in Example 1 was changed to a blue colored layer and the magenta colored layer was changed to a yellow colored layer. Using this color filter, an organic EL display device is used without a circularly polarizing plate so that the blue colored layer corresponds to the blue light emitting layer of the organic EL display device and the yellow colored layer corresponds to the red light emitting layer and the green light emitting layer. Configured.
In addition, the compounding composition of each colored layer is shown in Table 1.

Comparative Example 1
A color filter was produced in the same manner as in Example 1 except that the magenta colored layer in Example 1 was changed to a red colored layer and a blue colored layer. The number of pixels constituting the red colored layer and the number of pixels constituting the blue colored layer were the same. Using this color filter, an organic EL display device was constructed without using a circularly polarizing plate.
Comparative Example 2
An organic EL display device was configured without using any color filter or circularly polarizing plate.
Comparative Example 3
An organic EL display device was configured using a circularly polarizing plate without using a color filter.
In addition, as a circularly-polarizing plate, the thing of the patent document 1 which consists of a linearly-polarizing plate and a film substrate (1/4 wavelength plate) was used.

  The color characteristics, external light reflection, luminance, and process reduction effects of the machine EL display devices of Examples 1-2 and Comparative Examples 1-3 were evaluated based on the above evaluation criteria. The results are shown in Table 2.

(note)
1) Green pigment: Fastogen Green 2YK, MY (manufactured by DIC Corporation)
2) Magenta pigment: Hostaperm Red EB transp, Pigment Red 122 (manufactured by Clariant)
3) Blue pigment: C.I. I. Pigment Blue 15: 6 (trade name: Chromfine Blue 5201A, manufactured by Dainichi Seika Kogyo Co., Ltd.)
4) Yellow pigment: Paliotor Yellow D1819 (manufactured by BASF)
5) Red pigment: Chromophthal red A2B (Ciba Specialty Chemicals)
6) Dispersant: Disperbyk 111 (by Big Chemie Japan)
7) Monomer: Dipentaerythritol pentaacrylate (trade name: SR399, manufactured by Sartomer)
8) Polymer: The following copolymer resin solution (solid content 50%)
9) Polymerization initiator: 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one (trade name: Irgacure 907, manufactured by Ciba Specialty Chemicals)
10) Solvent: 3-methoxybutyl acetate (manufactured by Daicel Chemical Industries, Ltd.)

Composition of copolymer resin solution (solid content 50%) , methyl methacrylate (MMA) (manufactured by Kuraray Co., Ltd.): 63 parts by mass, acrylic acid (AA) (manufactured by Nippon Shokubai Co., Ltd.): 12 parts by mass, 2-hydroxyethyl Methacrylate (HEMA) (manufactured by Nippon Shokubai Co., Ltd.): 6 parts by mass / diethylene glycol dimethyl ether (DMDG) (manufactured by Junsei Chemical Co., Ltd.): 88 parts by mass / 2,2′-azobis (2-methylbutyronitrile) (trade name) : ABN-R, manufactured by Nippon Finechem Co., Ltd.): 7 parts by mass / glycidyl methacrylate (GMA) (manufactured by NOF Corporation): 7 parts by mass / triethylamine (manufactured by Wako Pure Chemical Industries, Ltd.): 0.4 parts by mass・ Hydroquinone (manufactured by Seiko Chemical Co., Ltd.): 0.2 parts by mass

  As apparent from Table 2, the use of a color filter comprising two colored layers made it possible to reduce the number of manufacturing steps. In addition, it was possible to provide an organic EL display device that can reduce external light reflection and has good color characteristics and luminance.

  The color filter of the present invention is suitably used for a portable information terminal device such as a cellular phone, a car audio, a television monitor, and an organic EL display device for a personal computer.

DESCRIPTION OF SYMBOLS 10 Color filter 11 Light-shielding part 13 Colored layer 13a Colored layer consisting of color (A), green colored layer, blue colored layer 13b Colored layer consisting of color (B), magenta colored layer, yellow colored layer 14 Overcoat layer 20 Organic EL Element side substrate 21 Substrate 22 Back electrode layer 23 Organic EL layer 24 Transparent electrode layer 25 Organic EL element 26 Insulating layer 27 Sealant 30 Organic EL display device

Claims (6)

  A color filter for an organic EL display device having a three-color light emitting layer, comprising a colored layer consisting of one color (A) selected from red, green and blue, and one color (B) selected from yellow, magenta and cyan A color layer, and the color (A) and the color (B) are complementary to each other.   The color filter according to claim 1, wherein a green color layer is formed in a portion corresponding to green of the color filter, and a magenta color layer is formed in portions corresponding to red and blue.   A magenta colored composition for forming a magenta colored layer is C.I. I. Pigment red 81, C.I. I. Pigment red 81: 1, C.I. I. Pigment red 83, C.I. I. Pigment red 122, C.I. I. Pigment red 209, C.I. I. Pigment bio red 19 and C.I. I. The color filter according to claim 1, comprising at least one pigment selected from CI Pigment Bio Red 23,   The color filter according to claim 1, wherein a blue colored layer is formed in a portion corresponding to blue of the color filter, and a yellow colored layer is formed in a portion corresponding to red and green.   The color according to any one of claims 1 to 4, wherein the number of pixels constituting the colored layer comprising the color (B) is twice the number of pixels comprising the colored layer comprising the color (A). filter.   An organic EL display device using the color filter according to claim 1.

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