JPH0695211B2 - Color filter - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter suitable for use in combination with a liquid crystal and an image sensor, and can be used for a television, a video monitor, a computer display and an image scanner. .

2. Description of the Related Art In a color liquid crystal display device including a liquid crystal that controls the amount of light transmitted or reflected and a color filter,
As the color filter, a filter in which red, green, and blue pixels and a black matrix are formed on a glass substrate by a dyeing method, a printing method, or the like is used. Especially, for the demands for high-definition images, color filters formed by a dyeing method are the mainstream. The same applies to the color image scanner.

Problems to be Solved by the Invention A color filter by a dyeing method is prepared by dyeing a dyeing substrate with a natural photosensitive resin such as gelatin or a photosensitive synthetic resin such as amino-modified polyvinyl alcohol with a dye such as an acid dye. However, there is a problem in reliability such as light resistance, heat resistance, and moisture resistance. Further, the printing method is prepared by using an ink in which a pigment is dispersed in a thermosetting resin or an ultraviolet curing resin, but there is a problem in forming a pattern with high definition and surface smoothness.

Japanese Patent Application Laid-Open No. 60-237403 discloses a photosensitive polyimide resin in which a pigment is dispersed. However, in the case of a polyimide resin, absorption occurs in the visible light region when the thickness is 1.0 μm or more, and there is a problem in color reproducibility. Occurs. Especially when it is necessary to change the electric field strength and optical path length of the cell gap by changing the thickness of the red, green, and blue pixels in order to improve the contrast (multi-gap, abbreviated below), it is difficult to achieve color reproducibility equivalent to that of a CRT. Become.

Further, anthraquinone as a photopolymerization initiator for the photosensitive resin,
Conventionally, polycyclic quinone compounds such as naphthoquinone have been used, but since the photosensitive wavelength is comparatively short, it takes a lot of time to form pixels due to light irradiation and it is a practical problem if a pigment is included. It was

Furthermore, if the pigment concentration is increased to obtain good color reproducibility, a sufficient polymer cannot be obtained only by irradiation with light, resulting in poor adhesiveness, failing to form a clean image by development, and improving resistance. Reliability such as environmental friendliness was also a problem. Further, it is possible to use a pigment dispersed in a natural photosensitive resin or a photosensitive polyvinyl alcohol resin, but there is a problem in resolution, sensitivity, and dispersion stability. Further, the resulting product had problems in heat resistance and moisture resistance.

Next, when the pigment is dispersed as it is, fine dispersion is difficult due to aggregation or association, and even if the pigment is dispersed, reaggregation occurs and there is a problem in stability.

Further, in the electrode configuration of the color filter, if the color filter is constructed by providing a transparent electrode such as ITO on a transparent substrate such as glass, a voltage drop occurs due to the insulating layer, so that a predetermined liquid crystal panel characteristic is obtained. A high voltage has to be applied to the panel. Particularly, in the case of a multi-gap panel, there arises a problem that a voltage cannot be applied depending on red, green and blue pixels. Also TFI made of amorphous silicon
When an element is used, it is necessary to shield light, and therefore it may be necessary to increase the pigment concentration of carbon or the like in the black matrix, and the insulating property of that portion becomes a problem unlike other pixels.

Means for Solving Problems Red, green containing a photosensitive resin and a pigment on a transparent substrate,
A color filter provided with blue pixels and a black matrix, and further provided with a transparent electrode layer on the surface, wherein the photosensitive resin is either a polyfunctional acrylate monomer or a polyfunctional methacrylate monomer, and an organic polymer binder. And a photopolymerization initiator comprising at least one selected from a halomethyloxadiazole compound and a halomethyl-s-triazine compound.

Action The photosensitive resin gives a pattern with high definition and good surface smoothness, and the pigment gives a color filter having good environmental resistance.

Example FIG. 1 shows a sectional view of an example of a panel structure using the color filter of the present invention. 1, 1 is a transparent substrate made of glass or plastic such as alkali resin, 2 is a transparent electrode made of red, green and blue pixels 2a containing a photosensitive resin and a pigment, a black black matrix 2b, ITO and the like. It is a color filter composed of layer 2c. 3 and 3 are alignment films made of polyimide or the like, and 4 are transistors 4a and source lines.
This is a TFT drive section including a transparent electrode 4b, a counter transparent electrode 4c, and a gate electrode 4d. 5 is a TN liquid crystal. Further, a polarization filter is provided on the surface of the transparent substrate opposite to the surface in contact with the liquid crystal.

Next, examples of the materials forming the color filter are shown.

As the photosensitive resin, polyfunctional acrylate monomer and polyfunctional methacrylate monomer, which are one of the polymerizable compounds having an ethylenically unsaturated bond, and chemical characteristics such as heat resistance and chemical resistance, surface hardness, and volume shrinkage. A basic composition containing an organic polymer binder for imparting mechanical properties such as degree, and a photopolymerization initiator composed of a halomethyloxadiazole compound, a halomethyl-s-triazine compound alone or in a composite. Can be used. As the polyfunctional acrylate monomer and the polyfunctional methacrylate monomer, ethylene glycol diacrylate, triethylene glycol diacrylate, 1,3-butadiol diacrylate, tetramethylene glycol diacrylate,
Propylene glycol diacrylate, trimethylolpropane triacrylate, trimethylol triacrylate, 1,4-cyclohexanediol diacrylate, pentaerythritol triacrylate, tetraethylene glycol diacrylate, pentaerythritol diacrylate, pentaerythritol tetraacrylate, dipentaerythritol triacrylate Acrylate, dipentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, sorbitol triacrylate, sorbitol tetraacrylate, soribitol pentaacrylate, sorbitol hexaacrylate, tetramethylene glycol dimethacrylate,
Triethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, trimethylolethane trimethacrylate, ethylene glycol dimethacrylate, 1,3-butanediol dimethacrylate, pentaerythritol dimethacrylate, pentaerythritol trimethacrylate, dipentaerythritol dimethacrylate, sorbitol trimethacrylate. Methacrylate, sorbitol tetramethacrylate, bis- [p- (3-methacryloxy-2-hydroxypropoxy) phenyl] diumethylmethane, bis- [p- (methacryloxyethoxy) phenyl] dimethylmethane, and the like, and other monomers Prepolymers, that is, dimers and trimers are also effective. Also other unsaturated carboxylic acids such as itaconic acid,
Ester compounds of crotonic acid, isocrotonic acid, maleic acid and aliphatic polyhydric alcohol are also effective. As the organic polymer binder, a copolymer of an unsaturated organic acid compound such as acrylic acid or methacrylic acid which is compatible with an acrylate monomer and an unsaturated organic acid ester such as methyl acrylate, ethyl methacrylate or benzyl methacrylate as a monomer. Is mentioned. Having an acidic group such as a carboxyl group enables water-soluble development, which is more economical and safe than organic solvent development.

As a photopolymerization initiator for a halomethyloxadiazole compound, a 2-halomethyl-5-vinyl-1,3,4-oxadiazole compound represented by the following general formula I described in JP-B-57-6096 is used. Is mentioned.

General formula I Here, W is a substituted or unsubstituted aryl group,
X represents a hydrogen atom, an alkyl group or an aryl group, Y represents a fluorine atom, a chlorine atom or a bromine atom, and n represents an integer of 1 to 3.

As a specific compound, 2-trichloromethyl-5-
Styryl-1,3,4-oxadiazole, 2-trichloromethyl-5- (p-cyanostyryl) -1,3,4-oxadiazole, 2-trichloromethyl-5- (p-methoxystyryl)- 1,3,4-oxadiazole and the like can be mentioned. As a photopolymerization initiator for a halomethyl-s-triazine compound, the following general formula I described in JP-B-59-1281 is used.
A vinyl-halomethyl-s-triazine compound represented by I, and 2- (naphth-1-yl) -4,6-bis-halomethyl-s represented by the following general formula III described in JP-A-53-133428. -Triazine compounds and the following general formula IV4- (p
-Aminophenyl) -2,6-di-halomethyl-s-triazine compounds.

General formula II Where Q is Br, Cl, P is _{-CQ 3, -NH 2, -NHR,} -NR 2, -
OR (wherein R is a phenyl or alkyl group), W is an optionally substituted aromatic, heterocyclic or those of the general formula IIA where Z is -O- or -S-.

General formula IIA General formula III Here, X-Br, -Cl is represented, m and n are integers of 0 to 3, R is represented by the general formula IIIA, R ₁ is H or OR (R is an alkyl, cycloalkyl, alkenyl or aryl group) R ₂ is It represents -Cl, -Br or an alkyl, alkenyl, aryl, or alkoxy group.

General formula IIIA General formula IV Here, R ₁ and R ₂ are represented by —H, an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group, or the general formulas IVA and IVB.

General formula IVA General formula IVB Here, R ₅ , R ₆ and R ₇ represent an alkyl group, a substituted alkyl group, an aryl group and a substituted aryl group. Examples of the substituted alkyl group and the substituted aryl group include an aryl group such as a phenyl group, a halogen atom, an alkoxy group, a carboalkoxy group, a carboaryloxy group, an acyl group, a nitro group, a dialkylamino group and a sulfonyl derivative. .
R _3, R ₄ represents -H, a halogen atom, an alkyl group, an alkoxy group. X and Y represent -Cl and -Br, and m and n represent 0, 1 or 2.

When R ₁ and R ₂ form a heterocyclic ring composed of a non-metal atom together with the nitrogen atom to which it is bonded, the heterocyclic ring includes those shown below.

Specific examples of the general formula II include 2,4-bis (trichloromethyl) -6-p-methoxystyryl-s-triazine and 2,4-bis (trichloromethyl) -6- (1-p-
Dimethylaminophenyl-1,3-butadienyl) -s-
Triazine, 2-trichloromethyl-4-amino-6-
Examples thereof include p-methoxystyryl-s-triazine.

As a specific example of the general formula III, 2- (naphth-1-
Yl) -4,6-bis-trichloromethyl-s-triazine, 2- (4-methoxy-naphth-1-yl) -4,6-
Bis-trichloromethyl-s-triazine, 2- (4-
Ethoxy-naphth-1-yl) -4,6-bis-trichloromethyl-s-triazine, 2- (4-butoxy-naphth-1-yl) -4,6-bis-trichloromethyl-s-
Triazine, 2- [4- (2-methoxyethyl) -naphth-1-yl] -4,6-bis-trichloromethyl-s-
Triazine, 2- [4- (2-ethoxyethyl) -naphth-1-yl] -4,6-bis-trichloromethyl-s-
Triazine, 2- [4- (2-butoxyethyl) -naphth-1-yl] -4,6-bis-trichloromethyl-s-
Triazine, 2- (2-methoxy-naphth-1-yl)
-4,6-bis-trichloromethyl-s-triazine, 2
-(6-Methoxy-5-methyl-naphth-2-yl)-
4,6-bis-trichloromethyl-s-triazine, 2-
(6-Methoxy-naphth-2-yl) -4,6-bis-trichloromethyl-s-triazine, 2- (5-methoxy-naphth-1-yl) -4,6-bis-trichloromethyl-s- Triazine, 2- (4,7-dimethoxy-naphtho-
1-yl) -4,6-bis-trichloromethyl-s-triazine, 2- (6-ethoxy-naphth-2-yl) -4,
6-bis-trichloromethyl-s-triazine, 2-
(4,5-Dimethoxy-naphth-1-yl) -4,6-bis-
Trichloromethyl-s-triazine etc. are mentioned.

Specific examples of the general formula IV include 4- [p-N, N-di (ethoxycarbonylmethyl) aminophenyl] -2,6-di (trichloromethyl) -s-triazine and 4- [o-methyl- p-N, N-di (ethoxycarbonylmethyl) aminophenyl] -2,6-di (trichloromethyl) -s-triazine, 4- [pN, N-di (chloroethyl) aminophenyl] -2,6 -Di (trichloromethyl) -s-triazine, 4- [o-methyl-pN, N-di (chloroethyl) aminophenyl] -2,6-di (trichloromethyl)
-S-triazine, 4- (p-N-chloroethylaminophenyl) -2,6-di (trichloromethyl) -s-triazine, 4- (p-N-ethoxycarbonylmethylaminophenyl) -2,6- Di (trichloromethyl) -s-triazine, 4- [p-N, N-di (phenyl) aminophenyl] -2,6-di (trichloromethyl) -s-triazine, 4- (p-N-chloroethyl) Carbonylaminophenyl) -2,6-di (trichloromethyl) -s-triazine, 4- [p-N- (p-methoxyphenyl) carbonylaminophenyl] 2,6-di (trichloromethyl) -s
-Triazine, 4- [m-N, N-di (ethoxycarbonylmethyl) aminophenyl] -2,6-di (trichloromethyl) -s-triazine, 4- [m-bromo-pN, N
-Di (ethoxycarbonylmethyl) aminophenyl]-
2,6-di (trichloromethyl) -s-triazine, 4-
[M-chloro-p-N, N-di (ethoxycarbonylmethyl) aminophenyl] -2,6-di (trichloromethyl)
-S-triazine, 4- [m-fluoro-pN, N-di (ethoxycarbonylmethyl) aminophenyl] -2,6
-Di (trichloromethyl) -s-triazine, 4- [o
-Bromo-p-N, N-di (ethoxycarbonylmethyl)
Aminophenyl] -2,6-di (trichloromethyl) -s
-Triazine, 4- [o-chloro-p, N, N-di (ethoxycarbonylmethyl) aminophenyl] -2,6-di (trichloromethyl) -s-triazine, 4- [o-fluoro-p-N , N-di (ethoxycarbonylmethyl) aminophenyl] -2,6-di (trichloromethyl) -s-triazine, 4- [o-bromo-pN, N-di (chloroethyl) aminophenyl] -2, 6-di (trichloromethyl)
-S-triazine, 4- [o-chloro-p-N, N-di (chloroethyl) aminophenyl] -2,6-di (trichloromethyl) -s-triazine, 4- [o-fluoro-p
-N, N-di (chloroethyl) aminophenyl] -2,6-di (trichloromethyl) -s-triazine, 4- [m-bromo-pN, N-di (chloroethyl) aminophenyl]
-2,6-di (trichloromethyl) -s-triazine, 4
-[M-chloro-p-N, N-di (chloroethyl) aminophenyl] -2,6-di (trichloromethyl) -s-triazine, 4- [m-fluoro-p-N, N-di (chloroethyl) ) Aminophenyl] -2,6-di (trichloromethyl)
-S-triazine, 4- (m-bromo-p-N-ethoxycarbonylmethylaminophenyl) -2,6-di (trichloromethyl) -s-triazine, 4- (m-chloro-
p-N-ethoxycarbonylmethylaminophenyl)-
2,6-di (trichloromethyl) -s-triazine, 4-
(M-Fluoro-p-N-ethoxycarbonylmethylaminophenyl) -2,6-di (trichloromethyl) -s-triazine, 4- (o-bromo-p-N-ethoxycarbonylmethylaminophenyl) -2, 6-di (trichloromethyl) -s-triazine, 4- (o-chloro-p-N-
Ethoxycarbonylmethylaminophenyl) -2,6-di (trichloromethyl) -s-triazine, 4- (o-fluoro-p-N-ethoxycarbonylmethylaminophenyl) -2,6-di (trichloromethyl) -s -Triazine, 4- (m-bromo-p-N-chloroethylaminophenyl) -2,6-di (trichloromethyl) -s-triazine, 4- (m-chloro-p-N-chloroethylaminophenyl) -2,6-di (trichloromethyl) -s-triazine, 4- (m-fluoro-p-N-chloroethylaminophenyl) -2,6-di (trichloromethyl) -s-triazine, 4- (o -Bromo-p-N-chloroethylaminophenyl) -2,6-di (trichloromethyl) -s-
Triazine, 4- (o-chloro-p-N-chloroethylaminophenyl) -2,6-di (trichloromethyl) -s
-Triazine, 4- (o-fluoro-p-N-chloroethylaminophenyl) -2,6-di (trichloromethyl)-
Examples include s-triazine and the like.

Furthermore, when the photopolymerizable composition of the present invention further contains a sensitizer, it is used in combination with a free radical generator represented by the above general formula, that is, a photopolymerization initiator, to increase the photopolymerization rate. Sensitizer is selected. Specific examples thereof include benzoin, benzoin methyl ether, benzoin, 9-fluorenone, 2-chloro-9-fluorenone, 2-methyl-9-fluorenone, 9-anthrone, 2-bromo-.
9-anthrone, 2-ethyl-9-anthrone, 9,10-
Anthraquinone, 2-ethyl-9,10-anthraquinone,
2-t-butyl-9,10-anthraquinone, 2,6-dichloro-9,10-anthraquinone, xanthone, 2-methylxanthone, 2-methoxyxanthone, 2-methoxyxanthone, thioxanthone, benzyl, dibenzalacetone, p- (dimethylamino) phenyl styryl ketone,
p- (Dimethylamino) phenyl-p-methylstyryl ketone, benzophenone, p- (dimethylamino) benzophenone (or Michler's ketone), p- (diethylamino) benzophenone, benzoanthrone, etc.
Examples thereof include benzothiazole compounds described in JP-A-51-48516.

As the red pigment, an anthraquinone pigment, a perylene pigment alone or a mixture of at least one of them with a disazo yellow pigment or an isoindoline yellow pigment is used. For example, as anthraquinone pigment, CI
Pigment Red 177, CI as a perylene pigment
Pigment Red 155, CI in terms of color reproducibility
Pigment Yellow 83 or CI Pigment Yellow 1
The mixing with 39 was good. The weight ratio of the red pigment to the yellow pigment was 100: 5 to 100: 50. Below 100: 4
The light transmittance from 400 nm to 500 nm could not be suppressed and the color purity could not be increased. Also, at 100: 51 or more, the dominant wavelength was shorter and the deviation from the NTSC target hue was large. Especially, the range from 100: 10 to 100: 30 was optimal.

As the green pigment, a halogenated phthalocyanine pigment alone or a mixture with a disazo yellow pigment or an isoindoline yellow pigment is used. For example, CI Pigment Grins 7, 36 and 37 and CI Pigment Yellow 83 or CI Pigment Yellow 139 Was mixed well. The weight ratio of the green pigment to the yellow pigment was 100: 40, which was better than 100: 5. Below 100: 4, the light transmittance from 400 nm to 450 nm could not be suppressed and the color purity could not be increased. 100:
Above 41, the dominant wavelength was longer and the deviation from the NTSC target hue was large. Especially, the range of 100: 20 was optimal rather than 100: 5.

As the blue pigment, a phthalocyanine pigment alone or a mixture with a dioxazine purple pigment is used.
CI Pigment Violet 23 was well mixed with either Pigment Blue 15: 3 or CI Pigment 5: 6. The weight ratio of blue pigment to purple pigment is 100: 50 rather than 100: 5.
Was good. Below 100: 4, the light transmittance from 400 nm to 420 nm could not be suppressed and the color purity could not be increased. At 100: 51 and above, the dominant wavelength becomes longer than NTSC and NTSC
The deviation from the target hue has increased. Especially 10 from 100: 5
The 0:20 range was optimal.

Furthermore, the above-mentioned pigment is used as an acrylic resin, a maleic acid resin,
A pigment-containing photosensitive resin having good dispersibility and dispersion stability was obtained by using a powdery processed pigment finely dispersed in either a vinyl chloride-vinyl acetate copolymer or an ethyl cellulose resin. In particular, processed pigments using an acrylic resin and an ethyl cellulose resin were optimal in terms of transparency and dispersion stability.

As the pigment for the matrix, carbon, titanium carbon, iron oxide alone or a mixture thereof was used, and the cases of carbon and titanium carbon were favorable. The weight ratio was good in the range of 100: 5 to 100: 40. At 100: 4 or less, the long-wavelength light transmittance increased. When it was 100: 41 or more, there was a problem in dispersion stability.

The pigment concentration in the total solid component consisting of the pigment of each color and the resin was 10 wt% to 45 wt%. If it is less than 9.5 wt%, the color purity cannot be improved unless the film thickness is 10 μm or more, which is a practical problem. When it is 46 wt% or more, there is a problem in dispersion stability. Especially, 20 wt% to 40 wt% was optimum.

Further, the average particle size of the pigment particle system is smaller than the visible light wavelength (400 nm to 700 nm), and more preferably, 1/2 is better in light transmittance.

Examples will be described in detail below.

Example 1 A glass substrate that had been washed with a neutral detergent, water, and isopropyl alcohol / freon was used as the transparent substrate, and the composition shown below was used as the photosensitive resin.

・ Benzyl methacrylate / methacrylic acid copolymer (73
/ 23 molar ratio); 30gr ・ Pentaerythritol tetraacrylate; 7.7gr ・ 4- [p-N, N-di (ethoxycarbonylmethyl)]
-2,6-di (trichloromethyl) -s-triazine; 0.3g
r ・ Hydroquinone monomethyl ether; 0.01gr ・ Ethylcellosolve acetate: 62gr Powder-processed pigment (CIx Pigment Red 177 finely dispersed in the acrylic resin with CI Pigment Red 177 as a red colorant in the above photosensitive resin) (Colortex Red U3BN Sanyo dye) And CI Pigment Yellow 83 are finely dispersed in ethyl cellulose resin, a mixture of powdered pigment (Colortex Yellow W E119 Sanyo Dye) (pigment net weight ratio 100: 20), and CI Pigment Green 36 maleic acid as the green colorant. -Based resin processed pigment (Colortex Green # 403 Sanyo Dye) and CI Pigment Yellow 83 ethyl cellulose resin processed pigment mixture (100: 10), and C.
I. Pigment Blue 15: 3 acrylic resin processed pigment (made by Colortex Blue UI-822 Sanyo dye) and CI pigment violet 23 maleic acid resin processed pigment (made by Colortex violet # 600 Sanyo dye) 100: 30), a mixture of carbon and titanium carbon (100: 30) as a black pigment, and kneading and dispersing each with a three-roll mill or the like to form a paste-like substance, and adding ethyl cellosolve acetate to the ball mill. Etc. were dispersed to prepare a solution. The weight ratio of the composition of each solution is shown in Table 1.

The pigment particle system used here was 0.7 μm or less, and in particular red was 0.5 μm, green was 0.3 μm, and blue was 0.2 μm.

Next, Table 2 shows each coating condition and exposure condition.

The prebaking was carried out at a temperature of 80 ° C. for 15 minutes, and the developing treatment was carried out with a sodium carbonate (1 wt%) aqueous solution treatment. The coating order of each color was black in the black matrix, red, green, and blue in the order of pixels. Table 3 shows each thickness.

The spectrum of the color filter created under the above conditions is shown in FIG.

Comparative Example 1 15 parts by weight of low-molecular-weight gelatin (average molecular weight 10,000), 2 parts by weight of ammonium dichromate, 0.5 parts by weight of chromium alum and 82.5 parts of water were placed on a glass substrate treated in the same manner as in Example 1.
Using a photosensitive dyeing base consisting of parts by weight, red 24 as a dye
P (made by Nippon Kayaku), green 1P (made by Nippon Kayaku), blue 5C, black CI1
10 was used and stained under the conditions shown in Table 4.

The pre-baking temperature is 60 ° C for 5 minutes, and the pixel red, green,
Color filters were created in the order of blue and black matrix. The thickness was red 1.0 μm, green 1.5 μm, blue 2.0 μm and black matrix 2.5 μm.

The color filters of Example 1 and Comparative Example 1 were replaced with a xenon fade meter (FAL-25AX-HC type Suga Test Instruments Co., Ltd.).
A light resistance test was conducted using the above, and the results after 1000 hours and the results of the heat resistance test (170 ° C., 10 hours) are shown in Table 5 as ΔE by Lab.

Comparative Example 2 Photosensitive polyimide resin (Photo Nice, manufactured by Toray Industries, Inc.)
The same pigment composition as in Example 1 was used, and N-methylpyrrolidone was used as a solvent. Exposure is 400 ml / cm ² to 600
A high pressure mercury lamp was used in the range of ml / cm ² , and a color filter was prepared by using a special developer (DV-140) for development.

The CIE chromaticity diagrams of the color filters of Example 1 and Comparative Example 2 are shown in NTS
It is shown in FIG. 3 in comparison with the chromaticity point of C.

As described above, the product of the present invention is clearly superior in reliability of color reproducibility, light resistance and heat resistance to the conventional product.

Similar results were obtained for other material compositions of the present invention.

EFFECTS OF THE INVENTION According to the present invention, it is possible to obtain a liquid crystal color display with high quality and high reliability.

[Brief description of drawings]

FIG. 1 is a sectional view of a liquid crystal display panel using a color filter of the present invention, FIG. 2 is a spectral characteristic diagram of a color filter in one embodiment of the present invention, and FIG. 3 is a chromaticity diagram thereof. 1 ... Transparent substrate, 2 ... Color filter, 3 ... Alignment film, 4 ... TFT driver, 5 ... TN liquid crystal.

Front page continuation (72) Inventor Kobayashi Kazuna, 4000 Kawajiri, Yoshida-cho, Haibara-gun, Shizuoka Prefecture Fuji Shashin Film Co., Ltd. (56) Reference JP 62-113106 (JP, A) JP 60-60737 (JP, B2) JP 62-3842 (JP, B2) JP 57-6096 (JP, B2)

Claims (13)

[Claims] 1. A color filter in which red, green, and blue pixels containing a photosensitive resin and a pigment and a black matrix are provided on a transparent substrate, and a transparent electrode layer is further provided on the surface thereof. Photopolymerization initiator in which the polymerizable resin comprises either a polyfunctional acrylate monomer or a polyfunctional methacrylate monomer, an organic polymer binder, and at least one selected from a halomethyloxadiazole compound and a halomethyl-s-triazine compound. A color filter having a composition containing and. 2. An organic polymer binder, an unsaturated organic acid compound such as acrylic acid or methacrylic acid, and a copolymer using an unsaturated organic acid ester compound such as methyl acrylate, ethyl methacrylate or benzyl methacrylate as a monomer. The color filter according to claim 1, wherein the color filter comprises: 3. The color filter according to claim 1, wherein the pigment is a processed pigment. 4. The processed pigment is a powder or paste in which the pigment is finely dispersed in at least one resin selected from the group consisting of acrylic resin, vinyl chloride-vinyl acetate copolymer, maleic acid resin and ethyl cellulose resin. The color filter according to claim 3, wherein the color filter is a color filter. 5. The red pigment comprises an anthraquinone pigment, a perylene pigment alone or a mixture of at least one of them with a disazo yellow pigment or an isoindoline yellow pigment. The color filter according to item 1. 6. The color filter according to claim 1, wherein the green pigment comprises a halogenated phthalocyanine pigment alone or a mixture with a disazo yellow pigment or an isoindoline yellow pigment. . 7. The color filter according to claim 1, wherein the blue pigment comprises a phthalocyanine pigment alone or a mixture with a dioxazine purple pigment. 8. The black matrix pigment comprises at least one selected from the group consisting of carbon, titanium carbon and iron oxide.
The color filter described in the item. 9. A red pigment is CI Pigment Red 177,
The color filter according to claim 1, which comprises CI Pigment Red 155 alone or a mixture of at least one of them with CI Pigment Yellow 83 or CI Pigment Yellow 139. 10. The green pigment is CI Pigment Grin 7,
3. The color filter according to claim 1, which is composed of CI pigment grin 36, CI pigment grin 37 alone, or a mixture of at least one of them with CI pigment yellow 83 or CI pigment yellow 139. 11. A blue pigment is CI Pigment Blue 15:
3. CI Pigment Blue 15: 6 alone, or a mixture of at least one of them and CI Pigment Violet 23, The color filter according to claim 1. 12. The pigment has a visible light wavelength (400 nm to 700 nm).
The color filter according to claim 1, which has a smaller average particle size. 13. The pigment concentration in all solid components of each color is 10 wt%.
To 45% by weight of claim 1
The color filter described in the item.