JP5668495B2 - Color filter for white light emitting diode light source and display device - Google Patents

Description

  The present invention relates to a color filter used in a liquid crystal display device or an organic EL display device, and a display device including the color filter.

Conventionally, in a liquid crystal display device, a CCFL (cold cathode fluorescent lamp) light source has been used as a light source of a backlight.
In recent years, white light emitting diode light sources (hereinafter sometimes simply referred to as “LED light sources”) have been adopted in liquid crystal display devices in place of CCFL light sources from the viewpoints of low power consumption and expansion of color reproduction regions. (For example, Patent Document 1).

JP 2010-128310 A

  As a result of intensive studies by the present inventors, when comparing the CCFL light source and the LED light source, the brightness of the same color filter combined with these light sources is higher when combined with the LED light source than when combined with the CCFL light source. It was found that would decrease.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a color filter excellent in luminance even when combined with an LED light source and a display device including the color filter and the LED light source. To do.

  As a result of intensive studies by the present inventors, it has been found that a color filter excellent in luminance can be obtained even when combined with an LED light source by setting the chromaticity coordinates of the blue pixel to a specific range, and to complete the present invention. It came.

That is, the color filter for white light emitting diode light source according to the present invention is a color filter for white light emitting diode light source having at least a red pixel, a green pixel and a blue pixel,
The chromaticity coordinates in the XYZ color system of JIS Z8701 of the blue pixel measured using a C light source are x = 0.141 to 0.165 and y = 0.125 to 0.150 , and the XYZ color system of JIS Z8701 of the green pixel The chromaticity coordinates in x are 0.280 to 0.320 and y = 0.550 to 0.610, the chromaticity coordinates in the XYZ color system of JIS Z8701 for red pixels are x = 0.640 to 0.670, y = 0.310 to 0.340,
The white light emitting diode light source is at least one selected from a light source combining a blue light emitting diode and a red / green phosphor and a light source combining a blue light emitting diode and an yttrium / aluminum / garnet phosphor. To do.

  In the color filter for a white light emitting diode light source according to the present invention, the blue pixel preferably contains a triarylmethane compound as a color material.

  In the color filter for a white light-emitting diode light source according to the present invention, the blue pixel has C.I. I. Pigment blue 1, C.I. I. Pigment blue 56, C.I. I. Pigment blue 61 and C.I. I. It is preferable to contain one or more lake pigments selected from the group consisting of CI Pigment Blue 62.

  In the color filter for a white light-emitting diode light source according to the present invention, the green pixel has C.I. I. Pigment green 58 and C.I. I. Pigment Yellow 138 is preferably contained.

A display device according to the present invention comprises a white light emitting diode light source and the color filter for the white light emitting diode light source , wherein the white light emitting diode light source combines a blue light emitting diode and a red / green phosphor, and It is at least one selected from a light source in which a blue light emitting diode and yttrium / aluminum / garnet phosphor are combined .

The LED light source color filter according to the present invention is excellent in luminance even when combined with an LED light source.
Since the display device according to the present invention includes the color filter, the display device is excellent in luminance even when combined with an LED light source.

FIG. 1 is a cross-sectional view schematically showing an example of a color filter for an LED light source according to the present invention. FIG. 2 is a cross-sectional view schematically showing another example of the color filter for LED light source according to the present invention. FIG. 3 is a cross-sectional view schematically showing an example of the liquid crystal display device of the present invention. FIG. 4 is a cross-sectional view schematically showing an example of the organic EL display device of the present invention. FIG. 5 is based on the color filter of the first embodiment, the chromaticity coordinates of the red pixels are fixed as in the first embodiment, and the remaining two color pixels (green pixel, blue pixel) while maintaining the NTSC ratio at 72.6%. ), When the chromaticity coordinates are changed by changing the film thickness, the relationship between the chromaticity y of the blue pixel and the white luminance Y (using the LED light source), and the chromaticity y of the blue pixel and the color of the green pixel. It is the graph which showed the relationship of degree y. FIG. 6 is based on the color filter of the first embodiment, the chromaticity coordinates of the green pixel are fixed as in the first embodiment, and the remaining two color pixels (red pixel, blue pixel while maintaining the NTSC ratio of 72.6%) ) When the chromaticity coordinates are changed by changing the film thickness, the relationship between the chromaticity y of the blue pixel and the white luminance Y (using the LED light source), and the chromaticity y of the blue pixel and the color of the red pixel. It is the graph which showed the relationship of the degree x.

In the present invention, chromaticity is chromaticity coordinates in the XYZ color system of JIS Z8701.
In the present invention, the color material is a concept including a pigment and a dye. The pigment means an insoluble solvent, and the dye means a solvent soluble.
The lake pigment is a pigment obtained by insolubilizing a dye in a solvent.
In the present invention, C.I. I. Pigment Blue “PB”, C.I. I. Pigment Green is “PG”, C.I. I. Pigment Yellow is “PY”, C.I. I. Pigment Red as “PR” and C.I. I. Pigment violet is represented as “PV”.
In the present invention, (meth) acrylate represents acrylate and / or methacrylate.
In the present invention, the resin is a concept including a polymer in addition to a monomer and an oligomer.
In the present invention, the molecular weight means a weight average molecular weight which is a polystyrene equivalent value measured by gel permeation chromatography (GPC) in a THF solvent when having a molecular weight distribution, and when having no molecular weight distribution, It means the molecular weight of the compound itself.

  Hereinafter, the color filter for white light emitting diode light source according to the present invention will be described first, and then the display device will be described.

(Color filter for white light-emitting diode light source)
A color filter for a white light emitting diode light source according to the present invention is a color filter for a white light emitting diode light source having at least a red pixel, a green pixel, and a blue pixel, and the JIS Z8701 of the blue pixel measured using a C light source. The chromaticity coordinates in the XYZ color system are x = 0.130 to 0.165 and y = 0.120 to 0.150.

Since the blue pixel has the specific chromaticity coordinate, the luminance is excellent even when the LED light source color filter according to the present invention is combined with the LED light source.
When the NTSC ratio is 50 to 80%, the chromaticity coordinate range of the blue pixel is preferable, and when the NTSC ratio is 72.6%, the chromaticity coordinate range of the blue pixel is more preferable.
The NTSC ratio refers to the ratio of the color reproduction range that can be covered when the color range that can be reproduced by the NTSC system is defined as 100% according to the 1976 UCS chromaticity diagram defined by the CIE (International Lighting Commission). A color filter used for a display such as a general television has an NTSC ratio of 72.6%.

FIG. 1 is a cross-sectional view schematically showing an example of a color filter for an LED light source according to the present invention.
As shown in FIG. 1, the color filter usually includes a transparent substrate 10, a blue pixel 21, a green pixel 22, a red pixel 23, and a light shielding unit 30 that are colored pixels formed on the transparent substrate 10.
The color filter for an LED light source of the present invention is formed by forming, for example, a protective film, a transparent electrode film, an alignment film, a spacer, etc. in addition to the transparent substrate 10, the colored pixels 21 to 23, and the light shielding portion 30. Also good.
In FIG. 1 and the subsequent drawings, for convenience of explanation, the vertical and horizontal dimension ratios and the dimension ratios between the layers and the members are exaggerated as appropriate instead of the actual dimensions.

(Transparent substrate)
The transparent substrate 10 in the color filter for an LED light source of the present invention is not particularly limited as long as it is a substrate transparent to visible light, and a transparent substrate used for a general color filter can be used. . For example, an inflexible transparent substrate such as quartz glass, alkali-free glass, or synthetic quartz plate, or a transparent transparent substrate such as a transparent resin film or an optical resin plate can be used.
Although the thickness of the transparent substrate 10 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.

(Colored pixels)
The colored pixels in the color filter for the LED light source of the present invention may include the blue pixels 21, the green pixels 22, and the red pixels 23, and the blue pixels may have any of the above-described chromaticity coordinates. Pixels other than may be included.
Normally, the colored pixels are formed by curing the color filter resin composition of each color in the opening between the light shielding portions 30 formed on the transparent substrate 10 as shown in FIG.
Further, the arrangement of the colored pixels is not particularly limited, and for example, a general arrangement such as a stripe type, a mosaic type, a triangle type, or a four pixel arrangement type can be used. Moreover, the width | variety, area, etc. of a coloring pixel can be set arbitrarily.
The thickness of the colored pixel is appropriately controlled by adjusting the coating method, the solid content concentration, the viscosity, and the like of the color filter resin composition, but is usually preferably in the range of 1 to 5 μm.

(Blue pixel)
In the color filter for LED light source of the present invention, the chromaticity coordinates in the XYZ color system of JIS Z8701 of the blue pixel measured using the C light source are x = 0.130 to 0.165 and y = 0.120 to 0.150.
Since the blue pixel has the specific chromaticity coordinate, the luminance is excellent even when the LED light source color filter according to the present invention is combined with the LED light source.

The blue pixel of the present invention may be made to have the chromaticity coordinates using a conventionally known pigment or dye.
The chromaticity coordinate of the blue pixel of the color filter used in combination with the conventional CCFL light source is measured using a C light source, and when NTSC ratio is 72.6%, x = 0.141 to 0.155, y = 0.070 to 0.110 Met. Therefore, it can be said that the color density of the blue pixel of the color filter for LED light source according to the present invention is lower than that of the conventional blue pixel.
As compared with the conventional color filter, the present inventors make only the color density of the blue pixel light and increase the color density of the green pixel or the red pixel while keeping the NTSC ratio constant at 72.6%. Thus, the blue pixel becomes the above chromaticity coordinate, the luminance of the color filter for the LED light source of the present invention is improved, and the chromaticity coordinate of the blue pixel when measured with the C light source is x = 0.130 to 0.165, y = When it is outside the range of 0.120 to 0.150, that is, when the NTSC ratio is kept constant at 72.6%, the color density of blue pixels is increased, or the color density of green pixels and red pixels is decreased, the color filter It was found that the brightness of the image does not improve sufficiently.
From the viewpoint of increasing the luminance of the color filter for an LED light source of the present invention, the chromaticity coordinates of the blue pixel when measured with a C light source are more preferably x = 0.141 to 0.165 and y = 0.125 to 0.150.

In the color filter for LED light source of this invention, it is preferable that the said blue pixel contains a triarylmethane compound as a color material from the chromaticity coordinate of a blue pixel being easy to be in the said specific range.
As a result of intensive studies by the present inventors, it has been found that the triarylmethane compound has a characteristic of high transmittance. Therefore, it is presumed that the inclusion of the triarylmethane compound makes it easier to reduce the color density of the blue pixel, makes it easier to keep the chromaticity coordinates of the blue pixel within the specific range, and to improve the luminance. The
What is used as a conventionally well-known blue dye can be used for a triarylmethane compound.
For example, triarylmethane dyes described in JP-A-2008-304766, triphenylmethane dyes described in JP-A-2000-162429, and triphenylmethane dyes described in JP-A-11-223720 are used. Can be used.
In particular, triarylmethane compounds represented by the following general formulas (1) and (2) are preferable from the viewpoints of transmittance, heat resistance, and weather resistance.
The transmittance of the blue pixel is preferably 80% or more at 405 to 480 nm.
In the present invention, the transmittance is a value measured using a microspectroscope OSP-SP2000 (manufactured by OLYMPUS) for a coating film having a thickness of 2 to 3 μm prepared by uniformly dispersing a colorant at a concentration of 30% by mass. Say.
The heat resistance means, for example, that the luminance does not decrease when the color densities before and after firing are combined. The firing temperature is arbitrarily set according to the process conditions, for example, 150 to 250 ° C., and the firing time is 10 to 200 minutes, for example.
The weather resistance means, for example, that the color difference ΔEa * b * (JIS Z8729) before and after the xenon lamp (illuminance 35 mW / cm ² ) is irradiated for 100 hours on the color filter substrate after film formation is small. ΔEa * b * is preferably 5.0 or less, more preferably 3.0 or less.

(In the general formulas (1) and (2), R ₁ represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms or a halogen atom, and R ₂ , R ₃ , R ₄ and R ₅ are each independently It represents a hydrogen atom, an optionally substituted alkyl group having 1 to 5 carbon atoms, an optionally substituted phenyl group or an optionally substituted benzyl group.)

R ₁ is preferably a hydrogen atom from the viewpoint of transmittance.
R ₂ , R ₃ , R ₄ and R ₅ are preferably a phenyl group or a benzyl group which may have a substituent from the viewpoint of heat resistance and weather resistance.

  A commercial item may be used for such a triarylmethane compound, for example, the brand name FANAL BLUE D6340 etc. by BASF Corporation can be used conveniently.

  When the blue pixel contains a triarylmethane compound as a color material, the content may be appropriately adjusted according to required luminance, contrast, etc., for example, the total mass of the entire color material of the blue pixel On the other hand, it is preferably 25% by mass or more from the viewpoint of increasing luminance, more preferably 50% by mass or more, and particularly preferably 75% by mass or more.

In addition, even when a triarylmethane compound containing a metal complex containing a metal such as phosphorus, molybdenum, tungsten, copper, nickel, and cobalt is used as a color material for a blue pixel, the chromaticity coordinates of the blue pixel It becomes easy to be within the range.
The reason for this is not clear, but it is presumed that such colorants are excellent in heat resistance and light resistance and are not easily affected by process conditions such as firing conditions at the time of colored pixel formation and substrate cleaning by UV irradiation. Is done.

A triarylmethane lake pigment is preferable as a color material for blue pixels from the viewpoint of improving heat resistance and light resistance.
Examples of the triarylmethane lake pigments include PB1, PB56, PB61, and PB62.
In the color filter for an LED light source of the present invention, the color material contains one or two or more lake pigments selected from the group consisting of PB1, PB56, PB61, and PB62 as a color material. It is preferable because it is easily within the specific range.

  When the blue pixel contains one or more lake pigments selected from the group consisting of PB1, PB56, PB61 and PB62 as the color material, the total content depends on the required brightness, contrast, etc. For example, it is preferably 25% by mass or more with respect to the total mass of the entire coloring material of the blue pixel, from the viewpoint of increasing luminance, more preferably 50% by mass or more, and 75%. It is particularly preferable that the content is at least mass%.

For the blue pixels, in addition to the above-described color materials, the PB15: 1, PB15: 3, and PB15: are appropriately used to adjust the contrast, luminance, color, and the like as long as they do not depart from the spirit of the present invention. 4, PB15: 6, other color materials such as PV23 may be included.
In the blue pixel of the present invention, the content of the color material other than the preferable triarylmethane compound with respect to the entire color material is preferably less than 25% by mass from the viewpoint of securing high luminance.

  Coloring materials such as the triarylmethane compound and the lake pigment may be used alone or in combination of two or more.

(Green pixel and Red pixel)
The color filter for an LED light source according to the present invention includes a green pixel and a red pixel in addition to the blue pixel.
The green pixel and the red pixel can be respectively a green pixel and a red pixel provided in a conventionally known color filter.
In the color filter for an LED light source according to the present invention, the chromaticity coordinates of the green pixel measured using the C light source are x = 0.280 to 0.320, y = 0.550 to 0.610, and the chromaticity coordinates of the red pixel are x = 0.640 to 0.670 and y = 0.310 to 0.340 are preferable from the viewpoint of increasing the luminance of the color filter.

  The green pixel may include, for example, a conventionally known green pigment such as PG1, PG4, PG7, PG36, or PG58. In addition to the green pigment, the green pixel may contain a conventionally known yellow pigment such as PY138 or PY150 in order to adjust contrast and color.

As a result of intensive studies by the present inventors, it was found that PY138 has a feature of high luminance. Therefore, in the color filter for LED light source according to the present invention, it is preferable that the green pixel contains PG58 and PY138 as color materials from the viewpoint of increasing the luminance of the color filter for LED light source.
The content of PG58 and PY138 in the green pixel is preferably 50 to 90% by mass of PG58 and 10 to 50% by mass of PY138 with respect to the total mass of the color material from the viewpoint of obtaining a green pixel with high luminance. More preferably, PG58 is 70 to 85% by mass and PY138 is 15 to 30% by mass.
In this case, the ratio of the contents of PG58 and PY138 is more preferably PG58: PY138 = 50: 50 to 90:10.

  The red pixel can include, for example, a conventionally known red pigment such as PR177, PR242, PR254, or PR208. In addition to the red pigment, the red pixel may contain conventionally known yellow pigments such as PY139 and PY150 in order to adjust contrast and color.

  Hereinafter, the resin composition for a color filter that cures to form the blue pixel will be described.

(Resin composition for color filter)
The resin composition for a color filter for forming a blue pixel has a chromaticity coordinate of a blue pixel measured using a C light source in a conventionally known color filter resin composition, where x = 0.130 to 0.165, y = It may be used by adjusting so as to be 0.120 to 0.150. That is, conventionally known pigment filters, binders, photoinitiators, catalysts, solvents, and other components other than the colorant may be those of conventionally known color filter resin compositions.
The resin composition for a color filter generally comprises a color material, a dispersant, a binder, a solvent, a photoinitiator, a curing agent, a catalyst, and the like. Hereinafter, each of such components will be described.

(Color material)
In the present invention, the color material is a concept including a pigment and a dye.
In the resin composition for a color filter for forming a blue pixel, the chromaticity coordinates of the blue pixel may be set within the specific range. Since suitable conditions, such as content of lake pigments, such as a triarylmethane compound and PB1, were mentioned above, description here is abbreviate | omitted.

  The resin composition for a color filter for forming a green pixel may contain the above-described green pigment such as PG58 and, if necessary, a yellow pigment such as PY138. Since the suitable content rate of PG58 and PY138 was mentioned above, description here is abbreviate | omitted.

  The resin composition for a color filter for forming a red pixel may contain a red pigment such as PR177 described above and a yellow pigment such as PY138 as necessary. What is necessary is just to adjust suitably the content rate etc. of a pigment according to the color characteristic etc. which are requested | required. For example, the content ratio of the red pigment to the total mass of the entire color material of the red pixel is usually about 60 to 90% by mass. For example, when a yellow pigment is contained, the content ratio of the yellow pigment to the total mass of the entire color material of the red pixel is usually about 10 to 40% by mass.

(Pigment particle size)
The average primary particle size of the pigment used in the present invention is not particularly limited as long as it can produce a desired color when used as a colored pixel of a color filter. The average primary particle diameter of the pigment varies depending on the type of pigment used, but is preferably in the range of 10 to 50 nm, and more preferably in the range of 10 to 40 nm from the viewpoint of improving contrast. When the average primary particle diameter of the pigment is in the above range, the liquid crystal display device and the organic EL display device can be easily made to have high contrast and high quality.
In addition, the average particle diameter of the pigment in the color filter can be obtained by a method of directly measuring the size of primary particles from an electron micrograph. Specifically, the minor axis diameter and major axis diameter of each primary particle are measured, and the average is taken as the particle diameter of the particle. Next, for 100 particles, the volume (weight) of each particle is obtained by approximating the obtained particle size to a rectangular parallelepiped, and the volume average particle size is obtained and used as the average particle size. The same result can be obtained regardless of whether the electron microscope is a transmission type (TEM) or a scanning type (SEM).
The particle size of the pigment in the dispersion can be measured using a Nitraso Co., Ltd. Nanotrac particle size analyzer UPA-EX.

  In the resin composition for a color filter, the mass ratio (P / V) between the color material (P) and the solid content (V) other than the color material is 0.1 to 1.0. From the viewpoints of required optical properties such as luminance and color, and plate making.

(Dispersant)
In the color filter resin composition, a conventionally known dispersant can be used to disperse the pigment as necessary.
As such a dispersant, for example, a cationic, anionic, nonionic, amphoteric, silicone-based or fluorine-based surfactant described in Patent Document 1 can be used.
Further, for example, a polymer dispersant described in JP-A-2007-070342 is also preferably used.

  Examples of commercially available dispersants include trade name Polyflow No. manufactured by Kyoeisha Chemical Co., Ltd. 75, 90, 95, DIC Corporation product names MegaFuck F171, F172, F173, Big Chemie Japan Corporation DISPERBYK (registered trademark) 111, 130, 161, 162, 163, 164, 170, 182, 2000, 2001, trade names of Efka Co., Ltd., Efka 46, Efka 47, Zeneca Co., Ltd., trade names Solsperth 3000, 5000, 9000, 12000, 13240. 13940, 17000, 20000, 24000, 26000, 28000, and the like. Of these, DISPERBYK2000 manufactured by Big Chemie Japan Co., Ltd. is preferable.

  When the dispersant is used, the amount thereof may be appropriately adjusted. For example, the amount is preferably 20 to 100 parts by mass with respect to 100 parts by mass of the pigment.

(Binder)
The binder is a component that imparts film-forming properties and adhesion to the coated surface to the color filter resin composition.
As a binder, the alkali-soluble, thermosetting, or thermoplastic binder used for the coloring pixel of a conventionally well-known color filter can be used. As such a binder, for example, a binder described in JP 2010-2746 A is preferable.

Examples of the alkali-soluble binder include ethylene, which is obtained by polymerizing monomers such as acrylic acid, methacrylic acid, dimer of acrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, vinyl acetic acid, and acid anhydrides thereof. -Vinyl acetate copolymer, ethylene-vinyl chloride copolymer, ethylene vinyl copolymer, polystyrene, acrylonitrile-styrene copolymer, ABS resin, polymethacrylic acid resin, ethylene methacrylic acid resin, polyvinyl chloride resin, chlorination 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 Tons, polyether sulfone, polyphenylene sulfide, polyarylate, polyvinyl butyral, epoxy resins, phenoxy resins, polyimide resins, polyamide-imide resins, polyamic acid resins, polyether imide resins, phenolic resins, urea resins, and the like.
In addition, polymerizable monomers methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, sec-butyl (meth) acrylate, isobutyl (meth) acrylate, tert -Butyl (meth) acrylate, n-pentyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, n-decyl (meth) acrylate, 2-hydroxy Examples include ethyl methacrylate, benzyl methacrylate, styrene, α-methylstyrene, N-vinyl-2-pyrrolidone, glycidyl (meth) acrylate, and the like.
In the present invention, a commercially available binder can also be used. preferable.
The molecular weight of the alkali-soluble binder is preferably 5,000 to 50,000.

Examples of the thermosetting binder include a polymer composed of a structural unit represented by formula (1) and a structural unit represented by formula (2) described in JP 2010-2746 A (binder epoxy resin). ) Is preferred.
The molecular weight of the thermosetting binder is preferably 5,000 to 100,000.

  In the present invention, the alkali-soluble binder or the thermosetting binder may be used alone or in combination of two or more.

(Polymerization initiator)
When using an alkali-soluble or thermosetting binder as the binder for the color filter resin composition, it is preferable to use a polymerization initiator from the viewpoint of promoting the curing reaction.
The polymerization initiator may be appropriately selected and used depending on the type of curable group possessed by the binder. For example, a photopolymerization initiator and a thermal polymerization initiator described in Patent Document 1 and Japanese Patent Application Laid-Open No. 2007-70342 can be used.
As the photopolymerization initiator, for example, 2,2′-azobisisobutyronitrile (AIBN), 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one and the like are preferable. .

  Examples of commercially available photopolymerization initiators include trade names Irgacure 184, 369, 651, 819, and 907 manufactured by Ciba Specialty Chemicals Co., Ltd., and Darocur series manufactured by Merck. Can be mentioned.

  When a polymerization initiator is used, the amount thereof may be adjusted as appropriate. For example, the amount is preferably 1 to 20% by mass relative to the total mass of the total solid content of the color filter resin composition.

(Curing agent)
The thermosetting binder is usually combined with a curing agent. As a hardening | curing agent, what is used in combination with a conventionally well-known thermosetting binder can be used.
As the curing agent, for example, a curing agent described in JP 2010-2746 A is preferable.
A hardening | curing agent may be used individually by 1 type, and may be used in combination of 2 or more type.
When the curing agent is used, the blending amount is usually in the range of about 1 to 100 parts by mass, preferably 5 to 50 parts by mass, per 100 parts by mass of the component having an epoxy group.

(catalyst)
When using a thermosetting binder, in order to improve the hardness and heat resistance of a colored pixel, you may use the catalyst which can accelerate | stimulate the thermosetting reaction between an acid and an epoxy. As such a catalyst, a thermal latent catalyst that exhibits activity during heat curing can be used.
The heat-latent catalyst exhibits catalytic activity when heated, accelerates the curing reaction and gives good properties to the cured product, and is added as necessary. The thermal latent catalyst is preferably one that exhibits acid catalytic activity at a temperature of 60 ° C. or higher. As such, a compound obtained by neutralizing a protonic acid with a Lewis base, a compound obtained by neutralizing a Lewis acid with a Lewis base, Lewis Examples thereof include a mixture of an acid and a trialkyl phosphate, sulfonic acid esters, onium compounds, and the like, and various compounds described in JP-A-4-218561 can be used.
The blending amount in the case of using the heat latent catalyst is usually about 0.01 to 10.0 parts by mass with respect to 100 parts by mass in total of the thermosetting binder and the curing agent.

(solvent)
In order to adjust the viscosity, pigment dispersibility, and dispersion stability over time of the resin composition for a color filter, a solvent can be used as necessary.
Examples of the solvent include alcohols such as isopropanol described in Patent Document 1, ketones such as acetone and methyl ethyl ketone, aromatic hydrocarbons such as toluene and xylene, diethylene glycol dimethyl ether (also known as bis (2-methoxyethyl) ether). Glycol ethers such as propylene glycol monomethyl ether (also known as 1-methoxypropan-2-ol) and ethyl acetate, propylene glycol monomethyl ether acetate (also known as 2-methoxy-1-methylethyl acetate), propylene glycol monoethyl ether acetate ( Also known as 2-ethoxy-1-methylethyl acetate), 3-methoxybutyl acetate (also known as 3-methoxybutyl acetate) and butyl carbitol acetate (also known as 2- (2-butoxyethoxy acetate) Ethyl) acetate esters such as and the like.
Of these, diethylene glycol dimethyl ether, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate and 3-methoxybutyl acetate are preferred.

  When the solvent is used, the amount thereof may be adjusted as appropriate. For example, the amount is preferably 10 to 90% by mass with respect to the total mass of the color filter resin composition.

(Other ingredients)
The color filter resin composition may contain various other components as required without departing from the spirit of the present invention.
For example, a pigment derivative may be included as long as the effects of the present invention are not impaired. Such a pigment derivative is a compound having a role of imparting a functional group to the pigment skeleton and adding various functions to the pigment. When a pigment derivative is added to the pigment at the time of pigment dispersion, the pigment-like skeleton of the pigment derivative is adsorbed or bonded to the surface of the pigment, whereby the surface of the pigment becomes polar, so that the affinity between the dispersant and the pigment is increased. It is considered that the dispersibility and dispersion stability can be secured. Examples of the pigment derivative include a derivative having a sulfonic acid group, a carboxyl group, a sulfonamide group, a phthalimidomethyl group, or the like in the above blue pigment or yellow pigment.

In addition to the pigment derivative, for example, a polymerization terminator, a chain transfer agent, a leveling agent, a plasticizer, a surfactant, an antifoaming agent, a silane coupling agent, an ultraviolet absorber, an adhesion promoter, and the like can be used.
Among these, surfactants that can be used include, for example, polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene nonyl phenyl ether, polyethylene Examples include glycol dilaurate, polyethylene glycol distearate, sorbitan fatty acid esters, fatty acid-modified polyesters, and tertiary amine-modified polyurethanes. In addition, a fluorosurfactant can also be used.
Furthermore, examples of the plasticizer include dibutyl phthalate, dioctyl phthalate, and tricresyl. Examples of the antifoaming agent and leveling agent include silicon-based, fluorine-based, and acrylic compounds.

(Preparation of resin composition for color filter)
The color filter resin composition may be prepared by uniformly dissolving or dispersing a coloring material, a binder, and other components such as a pigment dispersant and a polymerization initiator that are used as desired in a solvent. There is no particular limitation, and it can be prepared by mixing using a known mixing means.
As a method for preparing a resin composition for a color filter, for example, as described in JP 2010-243604 A, a method in which the desired component is mixed in a solvent using a dispersing machine such as a ball mill is used. be able to.

(Method for forming colored pixels)
The method for forming the colored pixel is not particularly limited, and may be formed by using the color filter resin composition by, for example, a pixel forming method such as a conventionally known photolithography method described in Patent Document 1.
For example, when the color filter resin composition includes a photocurable binder, the color filter resin composition is applied to the application target surface (region) by an inkjet method or a spin coating method, and then is applied by ultraviolet rays through a photomask. After exposure (pattern exposure), the unexposed portion can be formed by washing (developing) with a solvent, an alkaline aqueous solution such as an aqueous potassium hydroxide solution, or the like. After applying the resin composition, heat treatment (pre-baking) may be performed before exposure. Further, heat treatment may be performed after development.

(Shading part)
The light shielding unit 30 is provided so as to surround the colored pixels 21 to 23 and the outside of the pixel formation region in order to improve the contrast of the display image. What is used for the conventionally well-known color filter can be employ | adopted for a light-shielding part.
The light shielding unit 30 may be a metal thin film such as chromium by sputtering, vacuum deposition, or the like. In addition, the light shielding part 30 may be a resin layer in which light shielding particles such as carbon fine particles, metal oxides, inorganic pigments, and organic pigments are contained in a binder.
The thickness of the light shielding part is about 100 to 400 nm in the case of a metal thin film, and about 0.5 to 3.0 μm in the case of a resin layer containing light shielding particles.

FIG. 2 is a cross-sectional view schematically showing another example of the color filter for LED light source according to the present invention.
The LED light source color filter of FIG. 2 includes a protective film 40 formed to cover the colored pixels 21 to 23 in addition to the LED light source color filter 1 of FIG. Further, a transparent electrode film 50 for driving liquid crystal is formed on the protective film 40. An alignment film 60 is formed on the transparent electrode film 50.
The columnar spacer 70 has a shape of a convex spacer, and is formed at a plurality of predetermined positions on the transparent electrode film 50 in accordance with a region (non-display region) where the light shielding portion 30 is formed.
Hereinafter, the protective film, the transparent electrode film, the alignment film, and the spacer will be described.

(Protective film)
The protective film 40 is provided to flatten the surface of the color filter and prevent the components contained in the colored pixels 21 to 23 from eluting into other layers. The protective film 40 is formed by coloring a known negative-type photocurable resin composition or thermosetting resin composition having known transparency by a method such as spin coater, roll coater, spray, printing, and the like. It can form by apply | coating so that the light-shielding part 30 may be covered, and hardening with light and / or a heat | fever.
The thickness of the protective film 40 can be set in consideration of the light transmittance of the material used, the surface state of the color filter, and the like, and can be set, for example, in the range of 0.1 to 3.0 μm.

(Transparent electrode film)
The transparent electrode film 50 can be formed using indium tin oxide (ITO), zinc oxide (ZnO), tin oxide (SnO), or an alloy thereof. The thickness of the transparent electrode film can be about 20 to 500 nm, preferably about 80 to 300 nm.

(Alignment film)
The alignment film 60 can be formed by applying a coating solution containing a resin such as a polyimide resin by a known method such as spin coating, drying, curing with heat or light as necessary, and then rubbing. .

(Spacer)
A plurality of spacers are provided in a non-display area on the substrate in order to maintain a cell gap when the color filter is bonded to a liquid crystal driving side substrate such as a TFT array substrate. The shape and dimensions of the spacer are not particularly limited as long as the spacer can be selectively provided in a non-display region on the substrate and a predetermined cell gap can be maintained over the entire substrate.
When the columnar spacer 70 as shown in the figure is formed as the spacer, it has a constant height in the range of about 2 μm to 10 μm, and the protruding height (pattern thickness) is the thickness required for the liquid crystal layer, etc. Can be set as appropriate. The thickness of the columnar spacer 70 can be appropriately set within a range of about 5 to 20 μm. The formation density (density) of the columnar spacers 70 can be appropriately set in consideration of the thickness unevenness of the liquid crystal layer, the aperture ratio, the shape and material of the columnar spacers, for example, red, green and blue Necessary and sufficient spacer functions are expressed at a ratio of one for each set of colored pixels. The shape of such a columnar spacer is not particularly limited, and may be, for example, a columnar shape, a prismatic shape, a truncated cone shape, or a truncated pyramid shape.

  The spacer is applied, for example, directly on the transparent substrate by a method such as a spin coater, roll coater, spray, or printing, or through another layer such as a transparent electrode film, by applying a coating liquid of the curable resin composition, Dry to form a resin layer.

As an LED light source used in combination with the color filter according to the present invention, an LED light source (hereinafter, referred to as “RG phosphor”) that generates white light by combining a blue LED and a red / green phosphor (hereinafter also referred to as “RG phosphor”). , "LED (B-RG)") and LED that generates white light by combining a blue LED and an yttrium aluminum garnet phosphor (hereinafter also referred to as "YAG phosphor"). A light source (hereinafter sometimes referred to as “LED (B-YAG)”) is preferable.
Compared with the case where blue light, red LED, and green LED are combined to generate white light, the combination of the blue LED and RG phosphor or YAG phosphor generates white light. It can be inexpensive and downsized.

The RG phosphor may be any phosphor that absorbs blue light and emits red fluorescence and green fluorescence. For example, a conventionally known RG phosphor described in Patent Document 1 or Japanese Patent Application Laid-Open No. 2003-141905 is used. Can be used.
The YAG phosphor may be any phosphor that absorbs blue light and emits yellow fluorescence and green fluorescence. For example, a conventionally known YAG phosphor described in Patent Document 1 or Japanese Patent Application Laid-Open No. 2008-218486 is used. Can be used.

A display device according to the present invention includes a white light emitting diode light source and the color filter for the white light emitting diode light source.
Since the display device according to the present invention includes the color filter, the display device has excellent luminance even when combined with an LED light source, and has excellent display quality.

Examples of such a display device include a liquid crystal display device and an organic electroluminescent (organic EL) display device.
Hereinafter, a liquid crystal display device and an organic EL display device will be described.

FIG. 3 is a cross-sectional view schematically showing an example of a liquid crystal display device as a display device of the present invention.
In the liquid crystal display device, for example, a gap portion 90 of about 1 to 10 μm is provided by facing the color filter of the present invention and an electrode substrate 80 such as a TFT substrate, and the liquid crystal compound L is filled in the gap portion 90. , And the periphery thereof is sealed with a sealing material 100.
An alignment film 60 is provided on the inner surface side of the electrode substrate 80 facing the color filter 1. Usually, an LED light source (backlight) is disposed at a position opposite to the colored pixels 21 to 23 of the color filter 1 through a liquid crystal layer of a liquid crystal compound.

A driving method of the liquid crystal display device is not particularly limited, and a driving method used in a general liquid crystal display device can be employed. Examples of such a drive method include a TN method, an IPS method, an OCB method, and an MVA method. In the present invention, any of these methods can be preferably used.
The electrode substrate 80 facing the color filter 1 can be appropriately selected and used according to the driving method of the liquid crystal display device.
Furthermore, as the liquid crystal compound L filled in the gap portion 90, various liquid crystals having different dielectric anisotropy and mixtures thereof can be used according to the driving method of the liquid crystal display device of the present invention.

  The liquid crystal display device may include other optical members such as a light guide plate, a diffusion plate, and a prism sheet in addition to the above-described members.

(Organic EL display device)
The organic EL display device includes the above-described color filter of the present invention and an organic light emitter serving as an LED light source.
FIG. 4 is a cross-sectional view schematically showing an example of an organic EL display device as a display device of the present invention. The organic EL display device 3 includes a color filter 1 and an organic light emitter 120 (LED light source 110).
An organic protective layer 41 and an inorganic oxide film 130 may be provided between the color filter 1 and the organic light emitter 120.

As a method for laminating the organic light emitter 120, for example, the transparent anode 140, the hole injection layer 150, the hole transport layer 160, the light emitting layer 170, the electron injection layer 180, and the cathode 190 are sequentially formed on the upper surface of the color filter. Examples thereof include a method and a method in which the organic light-emitting body 120 formed on another substrate is bonded to the inorganic oxide film 130. As the transparent anode 140, the hole injection layer 150, the hole transport layer 160, the light emitting layer 170, the electron injection layer 180, the cathode 190, and other configurations in the organic light emitting body 120, known configurations can be appropriately used. The organic light emitting display device 3 thus manufactured can be applied to, for example, a passive drive type organic EL display device or an active drive type organic EL display device.
Note that the organic EL display device of the present invention is not limited to the configuration shown in FIG. 4, and can generally have a known configuration as an organic EL display device using a color filter.

  As a method for manufacturing a display device according to the present invention, any method may be used as long as the above-described components are stacked with high accuracy. Depending on the type of the display device, a general liquid crystal display device or an organic EL display device may be used. Manufacturing methods can be used.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and this embodiment has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

  Hereinafter, the present invention will be described more specifically with reference to examples. These descriptions do not limit the present invention.

The abbreviations of the compounds used in the synthesis examples are as shown in parentheses.
Methyl methacrylate (MMA)
Acrylic acid (AA)
2-hydroxyethyl methacrylate (HEMA)
Diethylene glycol dimethyl ether (DMDG)
2,2'-azobisisobutyronitrile (AIBN)
Glycidyl methacrylate (GMA)

(Synthesis Example 1)
In a polymerization tank, 63 parts by mass of MMA, 12 parts by mass of AA, 6 parts by mass of HEMA and 88 parts by mass of DMDG were charged, stirred and dissolved, and then 7 parts by mass of AIBN 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 mass of GMA, 0.4 parts by mass of triethylamine and 0.2 parts by mass 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%). It was.

The following materials were mixed and stirred at room temperature to obtain a curable resin composition as a binder.
The above copolymer resin solution (solid content 50%): 16 parts by mass Dipentaerythritol pentaacrylate (trade name SR399 manufactured by Sartomer): 24 parts by mass Orthocresol novolak type epoxy resin (Product made by Yuka Shell Epoxy Co., Ltd.) Name Epicoat 180S70): 4 parts by mass 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one (trade name Irgacure 907 manufactured by Ciba Specialty Chemicals Co., Ltd.): 4 parts by mass Parts DMDG: 52 parts by mass

(Preparation of blue pixel color filter resin compositions 1-6)
The following materials were mixed and stirred at room temperature to prepare resin compositions 1 to 6 for color filters for blue pixels.

(Resin Composition 1 for Color Filters for Blue Pixels)
Blue pigment (PB1): 2 parts by mass The curable resin composition (binder): 12 parts by mass 3-methoxybutyl acetate (solvent): 84 parts by mass Polymer dispersant (trade name DISPERBYK2000 manufactured by Big Chemie Japan Co., Ltd.) , Solid content 40%): 2 mass parts in terms of solid content

(Resin Composition 2 for Blue Pixel Color Filter)
Blue pigment (PB61): 2 parts by mass The curable resin composition (binder): 12 parts by mass 3-methoxybutyl acetate (solvent): 84 parts by mass Polymer dispersant (trade name DISPERBYK2000 manufactured by Big Chemie Japan Co., Ltd.) , Solid content 40%): 2 mass parts in terms of solid content

(Resin Composition 3 for Blue Pixel Color Filter)
Blue pigment (PB1): 1 part by weight Blue pigment (PB15: 6): 1 part by weight The curable resin composition (binder): 12 parts by weight 3-methoxybutyl acetate (solvent): 86 parts by weight Polymer dispersant ( Product name DISPERBYK2000, solid content 40% manufactured by Big Chemie Japan Co., Ltd.): 2 parts by mass in terms of solid content

(Resin Composition 4 for Color Filter for Blue Pixel)
Blue pigment (PB1): 1.5 parts by mass Blue pigment (PB15: 6): 0.5 parts by mass The curable resin composition (binder): 12 parts by mass 3-methoxybutyl acetate (solvent): 86 parts by mass High Molecular dispersant (trade name DISPERBYK2000, solid content 40%, manufactured by Big Chemie Japan Co., Ltd.): 2 parts by mass in terms of solid content

(Resin Composition 5 for Color Filters for Blue Pixels)
Blue pigment (PB1): 0.5 part by weight Blue pigment (PB15: 6): 1.5 part by weight The curable resin composition (binder): 12 parts by weight 3-methoxybutyl acetate (solvent): 86 parts by weight High Molecular dispersant (trade name DISPERBYK2000, solid content 40%, manufactured by Big Chemie Japan Co., Ltd.): 2 parts by mass in terms of solid content

(Resin Composition 6 for Color Filters for Blue Pixels)
Blue pigment (PB15: 6): 1.9 parts by mass Purple pigment (PV23): 0.1 parts by mass The curable resin composition (binder): 10 parts by mass 3-methoxybutyl acetate (solvent): 86 parts by mass High Molecular dispersant (trade name DISPERBYK2000, solid content 40%, manufactured by Big Chemie Japan Co., Ltd.): 2 parts by mass in terms of solid content

(Preparation of resin composition 1 for color filter for red pixel)
The following materials were mixed and stirred at room temperature to prepare a resin composition 1 for a color filter for red pixels.
Red pigment (PR254): 2.5 parts by weight Red pigment (PR177): 1.5 parts by weight Yellow pigment (PY150): 1.0 part by weight The curable resin composition (binder): 10 parts by weight Polymer dispersant (Brand Chemy Japan Co., Ltd., trade name DISPERBYK2000), solid content 40%): solid content conversion 5 parts by mass 3-methoxybutyl acetate (solvent): 80 parts by mass

(Preparation of green pixel color filter resin compositions 1-2)
The following materials were mixed and stirred at room temperature to prepare green pixel color filter resin compositions 1-2.

(Resin Composition 1 for Color Filter for Green Pixel)
Green pigment (PG58): 3.5 parts by mass Yellow pigment (PY150): 1.5 parts by mass The above curable resin composition (binder): 10 parts by mass Polymer dispersant (trade name, manufactured by Big Chemie Japan Co., Ltd.) DISPERBYK2000), solid content 40%): 5 mass parts in terms of solid content 3-methoxybutyl acetate (solvent): 80 mass parts

(Resin Composition 2 for Color Filter for Green Pixel)
Green pigment (PG58): 3 parts by weight Yellow pigment (PY138): 2 parts by weight The above curable resin composition (binder): 10 parts by weight Polymer dispersant (trade name DISPERBYK2000 manufactured by Big Chemie Japan Co., Ltd.), solid 40%): 5 parts by mass in terms of solid content 3-Methoxybutyl acetate (solvent): 80 parts by mass

Example 1
Spin the resin composition 1 for the color filter for the three colors of blue, green, and red prepared above on a glass substrate (NH Techno Glass Co., Ltd., "NA35") having a thickness of 0.7 mm. It was applied using a coater. Then, it heat-dried for 3 minutes on an 80 degreeC hotplate. A color filter having colored pixels of blue, green, and red was obtained by irradiating 60 mJ / cm ² of ultraviolet rays using an ultra-high pressure mercury lamp and post-baking in a clean oven at 200 ° C. for 30 minutes.
The film thickness of the colored pixel after curing is as follows. When measured using a C light source, the blue pixel has a target chromaticity x = 0.147 and y = 0.144, the green pixel has a target chromaticity x = 0.313, y = 0.564, The red pixel was adjusted so that the target chromaticity x = 0.661 and y = 0.330. The film thickness of each colored pixel at that time was 2.00 μm. Table 1 shows respective chromaticity coordinates in the XYZ color system of JIS Z8701 at the adjusted film thickness (2.00 μm) of the blue pixel measured using the C light source and the LED light source. In the table, “Y” represents the luminance of the blue pixel under each light source, and “white Y” represents the luminance of the color filter (white) including adjacent blue pixels, green pixels, and red pixels under the LED light source. Represent.

(Examples 2 to 5 and Comparative Example 1)
In Example 1, it replaced with the resin composition 1 for color filters for blue pixels, and respectively carried out similarly to Example 1 except having used the resin compositions 2-6 for color filters for blue pixels shown in Table 1, respectively. A color filter having colored pixels with a film thickness of 2.00 μm was produced. The chromaticity coordinates of each blue pixel measured using the C light source and the LED light source of Examples 2 to 5 and Comparative Example 1 are shown in Table 1.

(Comparative Example 2)
In Example 1, the blue pixel color filter resin composition 6 is used instead of the blue pixel color filter resin composition 1, and the green pixel color filter resin composition 1 is used instead of the green pixel color filter resin composition 1. A color filter having a colored pixel with a thickness of 2.00 μm was produced in the same manner as in Example 1 except that the resin composition 2 was used. Table 1 shows the chromaticity coordinates of the blue pixels measured using the C light source and the LED light source of Comparative Example 2.

(Relationship between chromaticity coordinates and brightness)
Next, the relationship between chromaticity coordinates and luminance in the composition of each colored pixel in Example 1 was examined as follows.
While maintaining the NTSC ratio at 72.6%, in the composition of each colored pixel of Example 1, the chromaticity coordinates of green or red are fixed at the chromaticity coordinates of the film thickness of 2.00 μm, and the chromaticity of the remaining two colors The relationship between chromaticity coordinates and luminance was examined by changing the coordinates. The results are shown in Table 2. Table 2 also shows the correspondence between the chromaticity coordinates using the C light source of each colored pixel and the chromaticity coordinates using the LED light source. For example, when a chromaticity coordinate of a blue pixel having a film thickness of 3.07 μm when a chromaticity coordinate of a red pixel is fixed is measured using a C light source, x = 0.139 and y = 0.109, and an LED light source is used. X = 0.151 and y = 0.056. For example, when the chromaticity coordinates of a blue pixel having a film thickness of 1.57 μm when the chromaticity coordinates of a red pixel are fixed are measured using a C light source, x = 0.155 and y = 0.162. When measured using x = 0.156, y = 0.085.

  That is, when the chromaticity coordinate of the red pixel is fixed, the film thickness of the blue pixel and the green pixel is changed, and the relationship between the chromaticity coordinate of the blue pixel and the luminance using the LED light source is examined. FIG. 5 is a graph showing the relationship between the chromaticity y of the blue pixel and the white luminance Y and the relationship between the chromaticity y of the blue pixel and the chromaticity y of the green pixel when the LED light source is used.

  When the chromaticity coordinate of the green pixel was fixed, the film thickness of the blue pixel and the red pixel was changed, and the relationship between the chromaticity coordinate of the blue pixel and the luminance using the LED light source was examined. A graph showing the relationship between the chromaticity y of the blue pixel and the white luminance Y and the relationship between the chromaticity y of the blue pixel and the chromaticity x of the red pixel when the LED light source is used is shown in FIG.

(Summary of results)
From Table 1, in Examples 1 to 5, the chromaticity coordinates of the blue pixels when measured using a C light source are in the ranges of x = 0.130 to 0.165, y = 0.120 to 0.150, and high luminance (white luminance) )was gotten.
On the other hand, in Comparative Examples 1 and 2, the chromaticity coordinate of the blue pixel when measured using the C light source was outside the above range, and the luminance was low.

From Table 2 and FIG. 5, when the chromaticity coordinate of the red pixel is fixed, the white luminance increases as the chromaticity coordinate y of the blue pixel increases, that is, the density of the blue pixel decreases.
From Table 2 and FIG. 6, when the chromaticity coordinate of the green pixel is fixed, the white luminance is higher as the chromaticity coordinate y of the blue pixel is larger, that is, as the density of the blue pixel is lower.
From Table 2 and FIGS. 5 and 6, high luminance (white luminance) was obtained when the chromaticity coordinates of the blue pixel were within the above range.

DESCRIPTION OF SYMBOLS 1 Color filter for LED light sources 2 Liquid crystal display device 3 Organic EL display device 10 Transparent substrate 21 Blue pixel 22 Green pixel 23 Red pixel 30 Light-shielding part 40 Protective film 41 Organic protective film 50 Transparent electrode film 60 Alignment film 70 Spacer 80 Electrode substrate 90 Gaps (Liquid Crystal Compound L)
DESCRIPTION OF SYMBOLS 100 Sealing material 110 LED light source 120 Organic light-emitting body 130 Inorganic oxide film 140 Transparent anode 150 Hole injection layer 160 Hole transport layer 170 Light emitting layer 180 Electron injection layer 190 Cathode

Claims (5)

A white light emitting diode light source color filter having at least a red pixel, a green pixel and a blue pixel,
The chromaticity coordinates in the XYZ color system of JIS Z8701 of the blue pixel measured using a C light source are x = 0.141 to 0.165 and y = 0.125 to 0.150 , and the XYZ color system of JIS Z8701 of the green pixel The chromaticity coordinates in x are 0.280 to 0.320 and y = 0.550 to 0.610, the chromaticity coordinates in the XYZ color system of JIS Z8701 for red pixels are x = 0.640 to 0.670, y = 0.310 to 0.340,
The white light emitting diode light source is at least one selected from a light source combining a blue light emitting diode and a red / green phosphor and a light source combining a blue light emitting diode and an yttrium / aluminum / garnet phosphor. A white light-emitting diode light source color filter.   The color filter for a white light-emitting diode light source according to claim 1, wherein the blue pixel contains a triarylmethane compound as a color material.   The blue pixel has C.I. I. Pigment blue 1, C.I. I. Pigment blue 56, C.I. I. Pigment blue 61 and C.I. I. The color filter for a white light-emitting diode light source according to claim 1 or 2, comprising one or more lake pigments selected from the group consisting of CI Pigment Blue 62.   The green pixel has C.I. I. Pigment green 58 and C.I. I. The color filter for a white light-emitting diode light source according to any one of claims 1 to 3, further comprising pigment yellow 138. A white light-emitting diode light source, and a white light-emitting diode light source color filter according to any one of claims 1 to 4 ,
The white light emitting diode light source is at least one selected from a light source combining a blue light emitting diode and a red / green phosphor and a light source combining a blue light emitting diode and an yttrium / aluminum / garnet phosphor. Display device.

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