JP2003185830A - Color filter and liquid crystal display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color filter having color brightness identical to that of printed matter and attaining an excellent display without any defect such as disconnection of ITO (indium tin oxide) lines and, to provide a liquid crystal display. <P>SOLUTION: The color filter is characterized by having an area of a triangle formed by connecting chromaticity coordinates of respective red, green and blue colors in a chromaticity diagram of an XYZ colorimetric system measured by using a C light source to be 80% or more versus an NTSC (National Television System Committee) standard and further having 4 μm or less film thickness of respective pixels, and the liquid crystal display device utilizes the color filter. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter and a liquid crystal display device using the same, and more particularly to a color filter having a wide color reproduction range and a liquid crystal display device.

[0002]

2. Description of the Related Art At present, liquid crystal display devices, which are lightweight, thin, and have low power consumption, are used for notebook PCs, portable information terminals,
It is used in various applications such as digital cameras. LCD display characteristics (brightness, color reproducibility, viewing angle characteristics, etc.)
As a result, the use of liquid crystal display devices is being expanded to desktop monitor applications in addition to conventional notebook PC applications. Further, recently, a large-sized liquid crystal television having further improved color reproducibility of a desktop monitor has been developed, and colors close to the color reproduction range of a CRT are being reproduced. Here, the color reproduction range is a triangular NTSC (National Television System Committee) that connects red, green, and blue chromaticity coordinates in the XYZ color system chromaticity diagram.
It is expressed by the area ratio to the standard.

The color reproduction range of a CRT is about 7 compared to the NTSC standard.
2%, and the chromaticity coordinates (x, y) in the XYZ color system chromaticity diagram of red, green, and blue are red (0.640,
0.330), green (0.290, 0.600), and blue (0.150, 0.060) EBU (Europe)
It is almost equal to the ean Broadcasting Union standard. However, it has the widest color reproduction range among existing CRTs or liquid crystal displays.
Even in the case of a display complying with the EBU standard, the color reproduction especially in the green region was insufficient, and it was difficult to display vividly like a printed matter.

The color reproducibility is wider than the EBU standard, and the good standards include the above-mentioned NTSC standard, which includes red, green, blue,
Chromaticity coordinates (x, y) in the XYZ color system chromaticity diagram of each color
Are red (0.670, 0.330) and green (0.2
10, 0.710) and blue (0.140, 0.080). When the chromaticity close to these coordinates can be satisfied, it is possible to display a printed matter.

In order to manufacture a liquid crystal display device having a wide color reproduction range, the color of the pixels of the color filter may be made thicker to make the color darker.

However, in the case of a conventionally produced desktop monitor or a liquid crystal display device for liquid crystal television, that is, a liquid crystal display device having a low color reproducibility of NTSC ratio of 72% (EBU standard) or less, a color filter is used. PR254 is used as the main pigment for the red pixels of, and PY150 or PY13 is used as the sub-pigment in some cases.
8 and the like are often used in combination, and the green pixel uses PG36 as the main pigment and PY1 as the sub-pigment, as in JP-A-9-203808.
50 or PY138 or the like is often toned, and the blue pixel is often toned by PB15: 6 alone. A liquid crystal display device having a wider color reproducibility using such a pigment system. , Especially the color reproducibility is 80 compared to NTSC
%, The thickness of each color pixel of the color filter becomes too large beyond the practical range, resulting in a large level difference on the color filter surface, resulting in ITO disconnection and liquid crystal alignment failure. There were cases. Further, it is difficult to form a pattern in a pixel having a large film thickness, and the taper becomes large, so that the resolution may be deteriorated or a crack may be generated.

Further, Japanese Unexamined Patent Publication (Kokai) No. 6-174909 describes a color filter having a high color reproduction range, but does not describe the film thickness, and since the particle size of the pigment is large, the brightness and contrast are extremely high. There was a problem that it fell to.

[0008]

SUMMARY OF THE INVENTION The present invention was devised in view of the above drawbacks of the prior art and has a practical film thickness of N.
It is to provide a liquid crystal display device that realizes high color reproducibility equivalent to TSC.

[0009]

Means for Solving the Problems The inventors of the present invention have made extensive studies to solve the problems of the prior art and found the following color filters. (1) The area of the triangle connecting the chromaticity coordinates of red, green, and blue in the XYZ color system chromaticity diagram measured using the C light source is 80% or more of the NTSC standard ratio, and each pixel film A color filter having a thickness of 4 μm or less. (2) The chromaticity coordinates (x, y) in the XYZ color system chromaticity diagram measured using the C light source are 0.635 ≦ x ≦ 0.6.
95, 0.300 ≦ y ≦ 0.350. The color filter according to (1) above, which has red pixels satisfying the respective expressions. (3) The chromaticity coordinate (x, y) in the XYZ color system chromaticity diagram measured using the C light source is 0.190 ≦ x ≦ 0.3.
20. The color filter according to any one of (1) and (2) above, which has a green pixel satisfying each of the equations of 0.580 ≦ y ≦ 0.687. (4) The chromaticity coordinates (x, y) in the XYZ color system chromaticity diagram measured using the C light source are 0.130 ≦ x ≦ 0.1.
60, The color filter according to any one of the above (1) to (3), which has a blue pixel satisfying each formula of 0.040 ≦ y ≦ 0.100. (5) Pigment Red 1 as a coloring component of the red pixel
77. The color filter according to any one of the above (1) to (4), which comprises 77. (6) The color filter according to any one of (1) to (5) above, which contains Pigment Green 7 as a coloring component of the green pixel. (7) The color filter according to (6) above, which contains Pigment Green 36 as a coloring component of the green pixel. (8) As a coloring component of a green pixel, at least one selected from Pigment Yellow 17, Pigment Yellow 138, Pigment Yellow 139, Pigment Yellow 150, and PY185 is included.
~ The color filter according to any one of (7). (9) Pigment Blue 1 as a coloring component of a blue pixel
5: 6 and Pigment Violet 23 are contained, The color filter in any one of said (1)-(8) characterized by the above-mentioned. (10) The average particle size of the pigment contained in the red and green pixels is 1
00 nm or less, and the average particle diameter of the pigment contained in the blue pixel is 200 nm or less, (1) to
The color filter according to any one of (9). (11) The color filter according to any one of (1) to (10) above, which contains a polyimide resin as a resin component of each pixel.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The color filter of the present invention has at least three color pixels of red, green and blue, and the red, green in the XYZ color system chromaticity diagram measured using a C light source, Area of a triangle formed by connecting each chromaticity coordinate of blue (color reproduction range)
Is preferably 80% or more of the NTSC standard ratio. This is because when the color filter is in this range, a display quality as good as that of printed matter can be obtained when the color filter is used in a liquid crystal display device. And it is more preferably 85% or more, further preferably 90% or more, and most preferably 95% or more.

The chromaticity range (x, y) of each color pixel that is preferable for obtaining a display as good as that of printed matter is as follows.
Red pixels satisfying the respective expressions of 5 ≦ x ≦ 0.695 and 0.300 ≦ y ≦ 0.350, 0.190 ≦ x ≦ 0.320,
A green pixel satisfying each expression of 0.580 ≦ y ≦ 0.687,
0.130 ≦ x ≦ 0.160, 0.040 ≦ y ≦ 0.1
Is a blue pixel satisfying each formula of 00, and more preferably,
0.655 ≦ x ≦ 0.695, 0.300 ≦ y ≦ 0.3
Red pixel satisfying each equation of 40, 0.200 ≦ x ≦ 0.3
10, a green pixel satisfying each equation of 0.600 ≦ y ≦ 0.687, 0.130 ≦ x ≦ 0.160, 0.040 ≦ y ≦
A blue pixel satisfying each equation of 0.090, and more preferably 0.665 ≦ x ≦ 0.695, 0.300 ≦ y ≦
Red pixel satisfying each equation of 0.330, 0.200 ≦ x ≦
Green pixels satisfying the respective equations of 0.300, 0.625 ≦ y ≦ 0.687, 0.130 ≦ x ≦ 0.160, 0.040
A blue pixel satisfying each formula of ≦ y ≦ 0.080, and most preferably 0.675 ≦ x ≦ 0.695, 0.300.
0.200, a red pixel satisfying each expression of ≦ y ≦ 0.330
Green pixels satisfying the respective expressions of ≦ x ≦ 0.300, 0.650 ≦ y ≦ 0.687, 0.130 ≦ x ≦ 0.160, 0.
It is a blue pixel that satisfies each expression of 040 ≦ y ≦ 0.070.

In each color pixel, in a region where the color is lighter than the above chromaticity range, display with high color reproducibility cannot be obtained, which is not preferable. Further, in a region where the color is darker than the above chromaticity range, the transmittance of the image becomes low and the brightness of the liquid crystal display device is lowered, which is not preferable. In the color filter of the present invention, the preferable brightness range is such that the Y value of white in the C light source is preferably 10 or more, more preferably 12
That is all. If the Y value of white is 10 or less, bright display may not be possible, which is not preferable.

One or more kinds of various pigments can be used in order to obtain the pixels having the above-mentioned color characteristics, and other pigments may be added within a range not impairing the color characteristics. Examples of typical pigments include Pigment Red (PR-) 2, 3, 9, 22,
38, 81, 97, 122, 123, 144, 146,
149, 166, 168, 169, 177, 179, 1
80, 190, 192, 206, 207, 209, 21
5, 216, 224, 242, 254, 266, Pigment Orange (PO-) 5, 13, 17, 31, 36,
38, 40, 42, 43, 51, 55, 59, 61, 6
4, 65, 71, Pigment Yellow (PY-) 12,
13, 14, 17, 20, 24, 83, 86, 93, 9
4, 95, 109, 110, 117, 125, 129,
137, 138, 139, 147, 148, 150, 1
53, 154, 155, 166, 173, 180, 18
5, Pigment Blue (PB-) 15 (15: 1, 1
5: 2, 15: 3, 15: 4, 15: 6), 16, 1
7, 21, 22, 60, 64, Pigment Violet (PV-) 19, 23, 29, 30, 32, 33, 3
6, 37, 38, 40, 50, Pigment Green (P
G-) 7, 10, 36, 37, 38, 47 and the like. As the above-mentioned pigments, those subjected to surface treatment such as rosin treatment, acidic group treatment, basic treatment and pigment derivative treatment may be used as required.

In the present invention, various pigments can be used without being limited to the above-mentioned pigments, but the red pixel has a high color tone and a high coloring power, can be formed into a thin film, and can easily increase the color purity. Is PR254, PR122, PR1
77, PR178, and / or PR179
It is preferable that the color tone is adjusted to include PY as a secondary pigment.
139 can also be preferably used. Especially PR254 and PR
A combination containing both 177 or PR254 and P
Combination including both R179 or PR177
And PR1 that includes both PY139 and PR1
A combination including both 77 and PY179, or P
A film thickness of 4 μm for a combination including both R254 and PR122, or for a PR177 single system and a PR122 single system.
In the following, the NTSC ratio is more preferably 80% or more, which is more preferable.

PR254 and PR177 are used as red pixels.
PR1 in all pigments when both are combined for toning
It is preferable that the weight ratio of 77 is 20 to 90%, the weight ratio of PR254 is 10 to 80%, the weight ratio of PR177 is 35 to 85%, and the weight ratio of PR254 is 15 to.
More preferably, it is 65%.

When color matching is performed using PR179, PR1
The weight ratio of 79 is preferably within 60%. Also, PR254 and / or PR177 and PY139
When these are combined, the weight ratio of PY139 is preferably within 25%, more preferably within 20%.

When both PR254 and PR122 are combined for color matching, the weight ratio of PR122 to the total pigment is 10 to 90%, and the weight ratio of PR254 is 10 to 9%.
0% is preferable, and the weight ratio of PR122 is 1
It is more preferable that the weight ratio of 0 to 50% and PR254 is 50 to 90%.

The above-mentioned pigment composition ratio is preferable for red, and depending on the color purity of other pixels, when the pigment concentration is 30% or more, the film thickness is 4 μm or less and NTSC is used.
This is because the ratio tends to be 80% or more.

It is preferable that the green pixel contains PG7 as a main pigment as a main pigment because the film thickness is 4 μm or less and the NTSC ratio is 80% or more. As a result of the examination, PG was used as the main pigment.
When 7 and PG 36 are mixed and used, the transmittance and the contrast ratio of the green pixel are increased, so that the present invention can be preferably performed. When PG7 and PG36 are mixed and used, the weight ratio of PG36 in the total green pigment is preferably 2 to 65%, more preferably 5 to 55% or less, still more preferably 15 to 35% or less. PG in all green pigments
If the weight ratio of 36 exceeds 65%, the color reproduction range may decrease, which is not preferable. When the weight ratio of PG36 is less than 2%, the effect of improving the transmittance and the contrast ratio is small, which is not preferable.

PY12 and PY are used as sub-pigments for green pixels.
13, PY17, PY83, PY109, PY110,
It is preferable that at least one of PY138, PY139, PY150, and PY185 is included in the toning, and particularly PY17, PY138, PY139, and PY15.
It is more preferable that the color tone is adjusted to include at least one of 0 and PY185. However, it is preferable to use PY138 in combination with another yellow pigment in order to form a thin film in a high color purity region. Specifically, PG7 and PY139
Or a combination containing both PG7, PY138, and PY139, PG7, PY139, and P
Combination including Y150, PG7, PY138 and PY
A combination including 185 and a combination including PG7 and PY150 are preferable because the film thickness is 4 μm or less and the NTSC ratio is 80% or more. In addition to these, it is also preferable to mix PG7 and PG36 as green pigments as described above.

As for the green pixel, the weight ratio of the green pigment in all the pigments is preferably 40 to 90%, and 45 to 8 is preferable.
It is more preferably 5%.

If the addition amount of the green pigment is less than the above amount, the pixel film thickness becomes large, which is not preferable. When PY17 is used as a sub-pigment for the green pixel, the weight ratio of PY17 in all pigments is 20 to 6.
It is preferably 0%, more preferably 30 to 60%. When toning is performed using PY138, the weight ratio of PY138 in all pigments is preferably 20 to 60%, more preferably 30 to 60%.
When toning with PY139, PY13 in all pigments
The weight ratio of 9 is preferably 5 to 40%,
It is more preferably 30%, further preferably 5 to 20%. When toning is performed using PY150, the weight ratio of PY150 in all pigments is preferably 5 to 50%, more preferably 5 to 40%, and further preferably 10 to 40%. PY1
When using 85, the weight ratio of PY185 in all pigments is preferably 5 to 40%, and 5 to 30%.
Is more preferable, and 5 to 20% is even more preferable. Moreover, you may use these yellow pigments in combination of 2 or more. The above-mentioned pigment composition ratio is preferable for a green color, and depending on the color purity of other pixels, if the pigment concentration is 35% or more, the film thickness is 4 μm or less and the NTSC ratio is 80% or more. 40
This is because when it is set to be at least%, the NTSC ratio tends to be at least 90%.

The blue pixel contains PB15: 6 as a main pigment and PV23 as a sub-pigment, and is toned to have a film thickness of 4 μm.
In the following, the NTSC ratio is preferably 80% or more, which is preferable. When PB15: 6 and PV23 are combined for toning as a blue pixel, the weight ratio of PB15: 6 in all pigments is 70 to 90%, and the weight ratio of PV23 is 10 to 3%.
The weight ratio of PB15: 6 is preferably 75% to 90%, the weight ratio of PV23 is more preferably 10 to 25%, and the weight ratio of PB15: 6 is 75%.
It is even more preferable that the weight ratio of .about.85% and PV23 is 15 to 25%. The above-mentioned pigment composition ratio is preferable for blue, and depending on the color purity of other pixels, when the pigment concentration is 20% or more, the film thickness of 4 μm or less is likely to be 80% or more of the NTSC ratio. 20
This is because when it is set to be at least%, the NTSC ratio tends to be at least 90%. If the amount of PV23 added exceeds the above range, the pixel film thickness becomes large, which is not preferable, and if it exceeds the above range, the tint may not be suitable for a blue pixel.

The pigment used in the color filter of the present invention preferably has a small primary particle size in order to obtain high transmittance and contrast ratio. As a specific range of the primary particle diameter, the pigments used for the red and green pixels, that is, the red pigment, the green pigment, the yellow pigment, and the like are preferably 100 nm or less, more preferably 75 nm or less, and further preferably 60 nm or less. The pigment used for the blue pixel, that is, the blue or purple pigment is preferably 200 nm or less, more preferably 150 nm or less.
nm or less, more preferably 100 nm or less. In order to obtain a high transmittance and a contrast ratio, it is preferable that the average particle diameter of the pigment contained in each color pixel pixel coating film is within the above range, and among them, the transmittance of the color filter and the green color, which greatly affects the contrast, are large. The average particle diameter of the pigment in the pixel is preferably within the above range. The pigment particle size can be measured, for example, by observing a cross section of a pixel using a scanning electron microscope (SEM).

The contrast of the color filter of the present invention is preferably 500 or more, more preferably 600 or more, further preferably 800 or more, and most preferably 100.
It is preferably 0 or more. When the contrast is less than 500, when the display is used, light scattered by the color filter leaks out, and the display lacks sharpness and the image quality may be insufficient.

The thickness of each color pixel in the color filter of the present invention is preferably 4 μm or less. More preferably 3.5 μm or less, further preferably 3 μm
Hereafter, most preferably, it is 2.5 μm or less. If the film thickness exceeds 4 μm, the level difference on the surface of the color filter becomes large, which may cause ITO disconnection or liquid crystal alignment failure. Further, it is difficult to form a pattern for a pixel having a film thickness of more than 4 μm, and the taper becomes large, resulting in a decrease in resolution.
Since the stress applied to the pattern becomes large, cracks may occur, which is not preferable.

The above film thickness has a correlation with the weight ratio of the coloring material and the resin component in each color pixel. The preferable colorant / resin component ratio (wt%) in each color pixel is preferably 30/70 or more, more preferably 35/65 or more, and further preferably 40/60 or more in the red pixel. In the green pixel, preferably 35/65 or more,
More preferably 40/60 or more, still more preferably 45 /
55 or more. For blue pixels, preferably 20
/ 80 or more, more preferably 25/75 or more, and further preferably 30/70 or more. If the amount of the resin component is too small, the film thickness can be reduced, but pattern peeling due to a decrease in adhesion to the substrate or cracks due to a decrease in coating film strength may occur, which makes pattern formation difficult. . On the contrary, if the amount of the pigment is too small, the degree of coloring is lowered, and the film thickness for obtaining the chromaticity of 80% or more of NTSC ratio becomes large. The above problems may occur.

Next, an example of a method for producing a color paste used for producing the color filter of the present invention will be described.

The color paste used in the present invention comprises a colorant dispersed or dissolved in a resin. As a method for dispersing or dissolving the colorant, a known technique can be used, and the resin and the colorant are mixed in a solvent and dispersed in a dispersing machine such as a ball mill, or dissolved by a stirring device to obtain a color paste. To get Further, as a dispersant for stabilizing the dispersion of the pigment, a polymer dispersant such as a pigment intermediate, a derivative, a dye intermediate or a derivative, "Solspers" (manufactured by Abyssia), and "EFKA" (manufactured by EFKA). Known materials such as these can be used.

In the present invention, a compound having a sulfonic acid derivative structure introduced into the pigment skeleton is preferably used as the pigment dispersant because the pigment dispersibility is improved and a high transmittance and contrast ratio can be obtained. The compound having a sulfonic acid derivative structure introduced into the pigment skeleton is, for example, a sulfonic acid group, or an alkali metal salt, ammonium salt, or amine salt of sulfonic acid introduced into a skeleton at least partially similar to the molecular structure of the pigment used. It is a compound having a structure or a structure in which a sulfonamide structure, a sulfonate structure or the like is introduced. Usually, the sulfonic acid derivative structure is introduced into the aromatic ring of the pigment skeleton, but it is not particularly limited. Also, the number of sulfonic acid derivative structures introduced is not particularly limited, and may be one or two or more in one molecule. Further, it may be a pure derivative of a single species having the same introduction number or introduction position, or may be a mixture of different derivatives.

The compound having the sulfonic acid derivative structure introduced into the pigment skeleton as described above is synthesized, for example, by the following method. Pigment or a similar compound is concentrated sulfuric acid,
The sulfonation reaction is carried out by adding to fuming sulfuric acid, chlorosulfonic acid, or a mixed solution thereof. The reaction solution is preferably diluted with a large amount of water or neutralized with a metal alkali aqueous solution or an amine aqueous solution. The obtained suspension is filtered, washed with an aqueous washing solution, and dried.

The dispersant having a sulfonic acid derivative structure introduced into the pigment skeleton as described above is effective for any pigment regardless of color, but in view of its particularly high dispersion effect, it is a phthalocyanine pigment or a quinophthalone pigment. , Diketopyrrolopyrrole pigments, anthraquinone pigments, and quinacridone pigments. Of these, although not particularly limited, PB15: 6, PG36, PY
138, PR177, PR254, PR122, etc. are effective, and when a compound having a sulfonic acid derivative structure introduced into these structures or a similar structure is added and dispersed, the dispersion stability becomes good and aggregation can be prevented, so that brightness and contrast are improved. Has the effect of improving.

The resin of the color paste is not particularly limited, and the resin usually used for the color filter,
That is, a resin such as an acrylic resin, an epoxy resin, or a polyamic acid can be preferably used. Depending on the resin used, a non-photosensitive car paste or a photosensitive color paste can be used, and can be appropriately selected according to the color filter manufacturing process.

The case where a polyamic acid is used as a typical example of the non-photosensitive color paste and an acrylic resin is used as a typical example of the photosensitive color paste will be described in detail below.

The polyamic acid can be obtained by reacting a tetracarboxylic dianhydride and a diamine.

In the synthesis of the polyamic acid in the present invention, as the tetracarboxylic dianhydride, for example, an aliphatic or alicyclic type can be used, and specific examples thereof include 1,2, 3,4-cyclobutane tetracarboxylic dianhydride, 1,2,3,4-cyclopentane tetracarboxylic dianhydride, 1,2,3,5-cyclopentane tetracarboxylic dianhydride, 1,2, 4,5-bicyclohexene tetracarboxylic dianhydride, 1,2,
4,5-cyclohexanetetracarboxylic dianhydride,
1,3,3a, 4,5,9b-hexahydro-5- (tetrahydro-2,5-dioxo-3-furanyl) -naphtho [1,2-C] furan-1,3-dione and the like can be mentioned. When an aromatic type is used, a polyamic acid that can be converted into a film having good heat resistance can be obtained. As a specific example thereof, 3,3 ′, 4,4′-benzophenonetetracarboxylic acid can be obtained. Dianhydride, pyromellitic dianhydride, 3,4,9,10-perylenetetracarboxylic dianhydride, 3,3 ', 4,4'-diphenylsulfone tetracarboxylic dianhydride, 4,4' -Oxydiphthalic anhydride, 3,3 ', 4,4'-biphenyltetracarboxylic dianhydride, 1,2,5,6-naphthalenetetracarboxylic dianhydride, 3,3 ", 4,4"- Paraterphenyl tetracarboxylic acid dianhydride and 3,3 ", 4,4" -metaterphenyl tetracarboxylic acid dianhydride are mentioned. Further, when a fluorine-based one is used, a polyamic acid that can be converted into a film having good transparency in the short wavelength region can be obtained, and as a specific example thereof, 4,4 ′-(hexafluoroisopropylidene) can be obtained. ) Diphthalic anhydride and the like. The present invention is not limited to these, and one or more tetracarboxylic dianhydrides may be used.

In the synthesis of the polyamic acid in the present invention, as the diamine, for example, an aliphatic or alicyclic type can be used. Specific examples thereof include ethylenediamine and 1,3-diamino. Cyclohexane, 1,4-diaminocyclohexane, 4,4′-diamino-3,3′-dimethyldicyclohexylmethane,
4,4'-diamino-3,3'-dimethyldicyclohexyl and the like can be mentioned. When an aromatic type is used, a polyamic acid that can be converted into a film having good heat resistance can be obtained, and specific examples thereof include 4,4′-diaminodiphenyl ether and 3,4′-diamino. Diphenyl ether, 4,4'-diaminodiphenylmethane,
3,3'-diaminodiphenylmethane, 4,4'-diaminodiphenyl sulfone, 3,3'-diaminodiphenyl sulfone, 4,4'-diaminodiphenyl sulfide, m-phenylenediamine, p-phenylenediamine, 2,4-diamino Toluene, 2,5-diaminotoluene, 2,6-diaminotoluene, benzidine, 3,3
′ -Dimethylbenzidine, 3,3′-dimethoxybenzidine, o-tolidine, 4,4 ″ -diaminoterphenyl, 1,5-diaminonaphthalene, 3,3′-dimethyl-4,4′-diaminodiphenylmethane, 4, 4'-bis (4-aminophenoxy) biphenyl, 2,2-bis [4- (4-aminophenoxy) phenyl] propane,
Examples thereof include bis [4- (4-aminophenoxy) phenyl] ether, bis [4- (4-aminophenoxy) phenyl] sulfone, and bis [4- (3-aminophenoxy) phenyl] sulfone. Further, when a fluorine-based one is used, a polyamic acid that can be converted into a film having excellent transparency in a short wavelength region can be obtained. As a specific example thereof, 2,2-bis [4- (4 -Aminophenoxy)
Phenyl] hexafluoropropane and the like.

When siloxane diamine is used as a part of the diamine, the adhesiveness with the inorganic substrate can be improved. The siloxane diamine is usually used in an amount of 1 to 20 mol% based on all diamines. If the amount of siloxane diamine is too small, the effect of improving the adhesiveness will not be exhibited, and if it is too large, the heat resistance will decrease. Specific examples of the siloxane diamine include bis-3- (aminopropyl) tetramethylsiloxane. The present invention is not limited to this, and one or more diamines may be used.

The polyamic acid is generally synthesized by mixing a tetracarboxylic dianhydride and a diamine in a polar organic solvent and reacting them. At this time, the degree of polymerization of the obtained polyamic acid can be adjusted by the mixing ratio of the diamine and the tetracarboxylic dianhydride.

In addition, there are various methods for obtaining a polyamic acid, such as reacting a tetracarboxylic acid dichloride with a diamine in a polar organic solvent and then removing hydrochloric acid and the solvent to obtain a polyamic acid. However, the present invention can be applied to polyamic acid regardless of the synthetic method.

Next, the repeating number of the structural unit of the polyamic acid used in the color paste of the present invention will be described. The higher the molecular weight, the better the mechanical properties of the polyimide film. Therefore, it is desired that the polyimide precursor polyamic acid also has a large molecular weight. On the other hand, when patterning a polyimide precursor film by wet etching, if the molecular weight of the polyamic acid is too large, there is a problem that the time required for development becomes too long. Therefore, the preferred range of the number of repeating structural units is 15 to 10.
00, more preferably 18 to 400, further preferably 20 to 100. Since the molecular weight of the polyamic acid generally varies, the preferable range of the number of repeating structural units here is 50 mol% or more, preferably 70 mol% or more of the total polyamic acid within this range, and It preferably means that 90 mol% or more is contained.

An acrylic resin will be described as an example of the resin for the photosensitive color paste. The acrylic resin generally has a structure containing at least an acrylic polymer, an acrylic polyfunctional monomer or oligomer, and a photopolymerization initiator in order to have photosensitivity.

Acrylic polymers that can be used include
Although not particularly limited, a copolymer of unsaturated carboxylic acid and ethylenically unsaturated compound can be preferably used. Examples of unsaturated carboxylic acids include acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, vinylacetic acid, and acid anhydrides.

These may be used alone or in combination with other copolymerizable ethylenically unsaturated compounds. Specific examples of the copolymerizable ethylenically unsaturated compound include methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, isopropyl acrylate, n-propyl methacrylate and methacrylic acid. Isopropyl, n-butyl acrylate, n-butyl methacrylate, acrylic acid s
ec-butyl, sec-butyl methacrylate, iso-butyl acrylate, iso-butyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate,
N-pentyl acrylate, n-pentyl methacrylate,
Unsaturated carboxylic acid alkyl ester such as 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, benzyl acrylate and benzyl methacrylate, fragrance such as styrene, p-methylstyrene, o-methylstyrene, m-methylstyrene and α-methylstyrene. Group vinyl compounds, unsaturated carboxylic acid aminoalkyl esters such as aminoethyl acrylate, glycidyl acrylate, unsaturated carboxylic acid glycidyl esters such as glycidyl methacrylate, vinyl acetate, carboxylic acid vinyl esters such as vinyl propionate, acrylonitrile, methacrylonitrile, Vinyl cyanide compounds such as α-chloroacrylonitrile, aliphatic conjugated dienes such as 1,3-butadiene and isoprene, acryloyl group at each end, and Examples thereof include, but are not limited to, macromonomers such as polystyrene having a methacryloyl group, polymethyl acrylate, polymethyl methacrylate, polybutyl acrylate, polybutyl methacrylate, and polysilicone.

Further, an acrylic polymer having an ethylenically unsaturated group added to its side chain is preferably used because the sensitivity during processing is improved. Examples of the ethylenically unsaturated group include vinyl group, allyl group, acryl group and methacryl group. As a method of adding such a side chain to an acrylic (co) polymer, when the acrylic (co) polymer has a carboxyl group, a hydroxyl group, or the like, an ethylenically unsaturated compound having a glycidyl group is added to these. In general, a method of addition reaction with acrylic acid or methacrylic acid chloride is used. In addition, a compound having an ethylenically unsaturated group can be added using isocyanate. Examples of the ethylenically unsaturated compound having a glycidyl group or acrylic acid or methacrylic acid chloride as used herein include glycidyl acrylate, glycidyl methacrylate, α-ethyl glycidyl acrylate, crotonyl glycidyl ether, crotonic acid glycidyl ether, and isocrotonic acid glycidyl. Examples thereof include ether, acrylic acid chloride and methacrylic acid chloride.

Examples of the polyfunctional monomer include bisphenol A diglycidyl ether (meth) acrylate, poly (meth) acrylate carbamate, modified bisphenol A epoxy (meth) acrylate, adipic acid 1,6-hexanediol (meth) acrylic acid. Ester, phthalic anhydride propylene oxide (meth) acrylic acid ester, trimellitic acid diethylene glycol (meth) acrylic acid ester, rosin modified epoxy di (meth) acrylate, alkyd modified (meth) acrylate oligomer, or tripropylene glycol di ( (Meth) acrylate, 1,6-hexanediol di (meth) acrylate, bisphenol A diglycidyl ether di (meth) acrylate, trimethylolpropane tri (meth) Acrylate, pentaerythritol tri (meth) acrylate, triacrylformal, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, dipentaerythritol penta (meth) acrylate. These can be used alone or in combination. Further, the following monofunctional monomers can also be used in combination, for example, ethyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, hydroxyethyl (meth) acrylate, n-butyl methacrylate, glycidyl methacrylate, lauryl ( (Meth) acrylate, stearyl (meth) acrylate, isobornyl (meth) acrylate, etc.,
A mixture of two or more of these or a mixture with another compound is used. By selecting and combining these polyfunctional and monofunctional monomers and oligomers, it is possible to control the sensitivity and processability characteristics of the paste. In particular, a methacrylate compound is preferable to an acrylate compound for increasing hardness, and a compound having 3 or more functional groups is preferable for increasing sensitivity. Further, melamines, guanamines and the like can be preferably used instead of the acrylic monomer.

The photopolymerization initiator is not particularly limited,
Known compounds can be used, for example, benzophenone, N,
N'-tetraethyl-4,4'-diaminobenzophenone, 4-methoxy-4'-dimethylaminobenzophenone, 2,2-diethoxyacetophenone, benzoin,
Benzoin methyl ether, benzoin isobutyl ether, benzyl dimethyl ketal, α-hydroxyisobutylphenone, thioxanthone, 2-chlorothioxanthone, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- [4- (methylthio) phenyl]-
2-morpholino-1-propane, t-butylanthraquinone, 1-chloroanthraquinone, 2,3-dichloroanthraquinone, 3-chloro-2-methylanthraquinone, 2-ethylanthraquinone, 1,4-naphthoquinone, 9,10-phene. Nantraquinone, 1,2-Benzanthraquinone, 1,4-Dimethylanthraquinone, 2-
Phenylanthraquinone, 2- (o-chlorophenyl)
Examples thereof include 4,5-diphenylimidazole dimer. Further, other acetophenone-based compounds, imidazole-based compounds, benzophenone-based compounds, thioxanthone-based compounds, phosphorus-based compounds, triazine-based compounds, and inorganic photopolymerization initiators such as titanates can also be preferably used. Further, it is preferable to add a sensitization aid such as p-dimethylaminobenzoic acid ester because the sensitivity can be further improved. Further, two or more kinds of these photopolymerization initiators can be used in combination.

The addition amount of the photopolymerization initiator is not particularly limited, but is preferably 1 to the total solid content of the paste.
30 wt%, more preferably 5 to 25 wt%, and further preferably 10 to 20 wt%.

In the color paste of the present invention, the solid content concentration of the resin component and the pigment combined is 2 to 30%, preferably 3 to 25%, more preferably 5 from the viewpoints of coating properties and drying properties. Used in the range of up to 20%.

As the solvent in the color paste used in the present invention, a solvent that dissolves the polyamic acid or acrylic resin used can be preferably used. Examples of the solvent that dissolves the polyamic acid include N
-Amide polar solvents such as methyl-2-pyrrolidone, N, N-dimethylacetamide, N, N-dimethylformamide, β-propiolactone, γ-butyrolactone,
Examples thereof include lactones such as γ-valerolactone, δ-valerolactone, γ-caprolactone and ε-caprolactone. In the case of an acrylic resin, in addition to these, for example, methyl cellosolve, ethyl cellosolve,
Ethylene glycol or propylene glycol derivatives such as methyl carbitol, ethyl carbitol, propylene glycol monoethyl ether, etc., or propylene glycol monoethyl ether acetate, ethyl acetoacetate, methyl-3-methoxypropionate, 3-methyl-3- Aliphatic esters such as methoxybutyl acetate, or aliphatic alcohols such as ethanol, 3-methyl-3-methoxybutanol,
It is also possible to use ketones such as cyclopentanone and cyclohexanone.

Therefore, as the solvent for the color paste used in the present invention, it is preferable to use a single solvent which dissolves the resin used or a mixed solvent of two or more kinds of solvents in an appropriate combination. In this case, a poor solvent for the resin to be used can be used as the auxiliary solvent. The preferable solvent is not particularly limited, but for example, N-
Examples thereof include a mixed solvent of methylpyrrolidone and cyclopentanone, and in the case of an acrylic resin, cyclopentanone alone can be preferably used.

A surfactant may be added to the color paste used in the present invention for the purpose of improving the coating properties and the drying properties of the colored coating film. The amount of the surfactant added is usually 0.001 to 10% by weight of the pigment, preferably 0.
It is from 0 to 1% by weight. If the amount added is too small, coating properties
There is no effect of improving the drying property of the colored coating film, and if the amount is too large, the physical properties of the coating film may be deteriorated. Specific examples of the surfactant, ammonium lauryl sulfate, anionic surfactants such as polyoxyethylene alkyl ether sulfate triethanolamine, stearylamine acetate, cationic surfactants such as lauryltrimethylammonium chloride, lauryldimethylamine oxide, Amphoteric surfactants such as lauryl carboxymethyl hydroxyethyl imidazolium betaine, nonionic surfactants such as polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, sorbitan monostearate, and silicone-based compounds with polydimethylsiloxane as the main skeleton Examples thereof include surfactants. In the present invention, the surfactant is not limited to these, and one or more surfactants can be used. In addition to the surfactant, an adhesion improver, a curing accelerator, etc. can be added.

A method for manufacturing the color filter of the present invention will be described. As a method of applying the color paste onto the substrate, a spin coater, a bar coater, a blade coater, a roll coater, a die coater, a method of applying the substrate by a screen printing method, a method of immersing the substrate in a solution, or a solution is used. Various methods such as spraying on the substrate can be used. As the substrate, a transparent substrate such as soda glass, non-alkali glass, borosilicate glass, or quartz glass, or a semiconductor substrate such as silicon or gallium-arsenide is usually used, but is not particularly limited thereto. In addition,
When applying a color paste on a substrate, treating the substrate surface with an adhesion aid such as a silane coupling agent, aluminum chelating agent, or titanium chelating agent can improve the adhesion between the colored coating and the substrate. , As needed.

After coating the color paste on the transparent substrate by the above-mentioned method, the coating film of the color paste is formed by air drying, heat drying, vacuum drying or the like. In the case of heat drying, use an oven, hot plate, etc.
It is preferable to carry out the treatment in the range of 80 ° C. for 1 minute to 3 hours. Next, when the color paste is non-photosensitive, a photoresist is applied on the color paste coating film to form a photoresist coating. A photoresist is not required for the photosensitive color paste, but an oxygen barrier film may be formed if necessary. Then, a mask is placed on the film, and ultraviolet rays are irradiated using an exposure device. Then, the color paste coating film is etched with an alkaline developer. If there is a photoresist film or an oxygen barrier film, they are also developed or etched at the same time, and then they are removed by a stripping solution.

The alkaline substance used in the alkaline developer used in the present invention is not particularly limited, and examples thereof include sodium hydroxide, potassium hydroxide, sodium carbonate,
Inorganic alkalis such as potassium carbonate, sodium silicate, sodium metasilicate, aqueous ammonia, ethylamine,
Primary amines such as n-propylamine, secondary amines such as diethylamine and di-n-propylamine, tertiary amines such as triethylamine and methyldiethylamine,
Tetraalkylammonium hydroxides such as tetramethylammonium hydroxide (TMAH), quaternary ammonium salts such as choline, alcohol amines such as triethanolamine, diethanolamine, monoethanolamine, dimethylaminoethanol, diethylaminoethanol, pyrrole, piperidine 1,8-diazabicyclo [5,4,0] -7-undecene, 1,5-diazabicyclo [4,3,0] -5-nonane, organic alkalis such as morpholine, and other cyclic amines. Although it depends on the developing conditions and the coating conditions, organic alkalis are preferred over inorganic alkalis because they often cause less film peeling during development.

Among the organic alkalis, hydroxyl group-containing organic amines such as tetraalkylammonium hydroxides and alcohol amines are particularly preferable because they have excellent penetrability into the etching film. Although not particularly limited, diethylaminoethanol, dimethylaminoethanol, and TMAH are preferable. The concentration of alkaline substance is 0.01% by weight to 5
It is 0% by weight. It is preferably 0.05% by weight to 10% by weight, and more preferably 0.1 to 1% by weight. When the developing solution is an aqueous alkaline solution, the developing solution contains ethanol, γ-butyrolactone, dimethylformamide, N-
A water-soluble organic solvent such as methyl-2-pyrrolidone may be added as appropriate.

The coating pattern of the obtained color paste is then heat-treated to form a patterned color filter. The heat treatment is usually performed in air, in a nitrogen atmosphere, in a vacuum, or the like at 150 to
It is carried out continuously or stepwise at a temperature of 350 ° C., preferably 180 to 300 ° C. for 0.5 to 5 hours.
By this heating step, the polyimide precursor is converted into polyimide, and the photosensitive acrylic resin is cured.

The patterning process as described above is performed in red,
A color filter for a liquid crystal display device can be manufactured by sequentially using color pastes of each color such as green and blue and, if necessary, a black color paste. Here, the patterning order of each color is not limited.

Next, a liquid crystal display device produced by using the color filter of the present invention will be described. INDUSTRIAL APPLICABILITY The present invention includes twisted nematic (TN), super twisted nematic (STN), in-plane switching (IPS), vertical alignment (VA), and optically convencend bend (OCB). It can be applied to a liquid crystal display mode in which colorization is performed using a color filter. Since the color filter of the present invention has a wide color reproduction range and a low transmittance, the liquid crystal display mode to be applied has a relatively high aperture ratio and is capable of bright display TN,
Or VA mode, IP in terms of wide viewing angle
S or VA mode is preferred. The VA mode is more preferable because it enables bright display and has a wide viewing angle.

A method for manufacturing a TN mode liquid crystal display device will be described below as a specific example, but the present invention is not limited to this.

If necessary, a transparent protective film is formed on the color filter, and a transparent electrode such as an ITO film is formed on the transparent protective film. Furthermore, a liquid crystal alignment film that has been subjected to a rubbing treatment for liquid crystal alignment is provided thereon. Next, the color filter substrate and a transparent electrode substrate having a transparent electrode such as an ITO film formed on the transparent substrate are faced to each other with a spacer for maintaining a cell gap therebetween and bonded. In addition to the transparent electrode, a thin film transistor (TFT) element or a thin film diode (TF) is provided on the transparent electrode substrate.
D) elements, scanning lines, signal lines, and the like are provided to form a TFT liquid crystal display device or a TFD liquid crystal display device. Next, after injecting liquid crystal from the injection port provided in the seal part, the injection port is sealed. Next, the polarizing plate is attached to the outside of the substrate and then an IC driver or the like is mounted to complete the liquid crystal display device.

[0062]

EXAMPLES The present invention will be specifically described below based on examples, but the present invention is not limited thereto.

The measuring method in the examples is as follows. <Chromaticity> The spectral transmittance and color coordinates of the color filter are measured by Otsuka Electronics Co., Ltd., microspectrophotometer "MCPD-2".
000 ". The color coordinates are values at the C light source measured under the condition of a 2 ° field of view. <Thickness> Measured by Surfcom 1200A manufactured by Tokyo Seimitsu Co., Ltd. <Pigment average particle size> Hitachi (Ltd.) ) Scanning electron microscope "S-9"
00H "type is used, a cross-sectional photograph of each pixel of the color filter is taken at 50,000 times, and the particle diameters of all 40 contained pigment particles are measured within a continuous area area containing 40 pigment particles. The average value was taken as the average particle diameter of the pigment, even when two or more pigment particles seem to be collected into one.
Each was recorded as a separate particle as long as it could be discriminated. If the particle shape is not spherical, such as elliptical or needle-like, the longest diameter (major axis) and the shortest diameter (minor axis) are measured, and (major axis + minor axis) / 2 is defined as the particle size of the particle. did. <Contrast ratio> The color filter substrate is placed between the polarizer and the analyzer, and the light transmittance (I1) when the polarizer and the analyzer are parallel to each other and the light transmittance when the polarizer and the analyzer go straight ( It was determined by measuring the ratio of I2) (I1 / I2). A polarizing film "NPF-G1220DUN" manufactured by Nitto Denko Corporation was used for the polarizer and the analyzer. As the light source, a backlight unit using a hot cathode tube, "FL8A-EX / 70" manufactured by Meitaku System was used. The brightness of the light transmitted through the two polarizing films with the color filter substrate inserted between them is measured by a color brightness meter, Topcon "BM-5".
The contrast ratio of the color filter was determined by using A ″ under the condition of a visual field of 1 °.

Example 1 A. Synthesis of Polyamic Acid 4,4′-Diaminodiphenyl ether 95.1 g and bis (3-aminopropyl) tetramethyldisiloxane 6.2 g were charged together with γ-butyrolactone 525 g and N-methyl-2-pyrrolidone 220 g 3,3 ′. 4,
4'-biphenyltetracarboxylic dianhydride 144.
After adding 1 g and reacting at 70 ° C. for 3 hours, 3.0 g of phthalic anhydride was added and further reacting at 70 ° C. for 2 hours to obtain a 25% by weight polyamic acid solution (PAA-1).

B. Synthesis of polymer dispersant 4,4′-diaminobenzanilide 161.3 g, 3,
176.7 g of 3'-diaminodiphenyl sulfone and 18.6 g of bis (3-aminopropyl) tetramethyldisiloxane were added to 2667 g of γ-butyrolactone, N-
Charged with 527 g of methyl-2-pyrrolidone 3,
3 ', 4,4'-biphenyltetracarboxylic dianhydride
After adding 439.1 g and reacting at 70 ° C. for 3 hours,
2.2 g of phthalic anhydride was added, and the mixture was further reacted at 70 ° C. for 2 hours to give a 20% by weight polyamic acid solution (PD-
1) was obtained.

C. Preparation of Dispersion Pigment Red PR254 2.88 g (60 wt% of the entire pigment, of which) Pigment Red PR17
7 1.92 g (40 wt%) and polymer dispersant (PD
-1) 2.67 g and γ-butyrolactone 81.4
g was charged together with 90 g of glass beads, the mixture was dispersed at 7,000 rpm for 5 hours using a homogenizer, and then the glass beads were removed by filtration. In this way, the pigment PR25
A 6% solution of a dispersion liquid of 4 and PR177 was obtained.

D. Preparation of color paste Polymer solution (PAA-1) 1 was added to dispersion liquid 44.45 g.
3.34 g of γ-butyrolactone 22.82 g, 3-
Methoxy-3-methyl-1-butanol 18.80 g
The solution diluted with is added and mixed, and further bic chem
The IE "surfactant" BYK361 "was added to the total solid content of 1
It was added to 000 ppm to obtain a red paste. The pigment / polymer ratio (weight ratio) of this paste is 40/60
Is. Similarly to the red paste, a green paste having a pigment weight composition of PG7 / PY17 = 65/35 and a pigment / polymer ratio (weight ratio) = 46/54, PB15:
A blue paste having a 6 / PV23 = 80/20 and a pigment / polymer ratio (weight ratio) = 28/72 was prepared.

E. Preparation of colored coating film First, a black color paste prepared by dispersing carbon black in a polyamic acid resin is applied, and the coating is performed at 120 ° C. for 20 minutes.
It is dried for a minute, and a positive photoresist (“OFPR-800” manufactured by Tokyo Ohka Co., Ltd.) is applied on this, followed by 1 at 90 ° C.
Dry for 0 minutes. Canon Inc. UV exposure machine "PLA
Using -501F ", it was exposed to 60 mJ / cm ² (ultraviolet intensity of 365 nm) through a photomask made of chromium.
After the exposure, the photoresist was immersed in a developer containing a 2.25% aqueous solution of tetramethylammonium hydroxide to develop the photoresist and etch the colored film of the polyimide precursor at the same time. The photoresist layer that became unnecessary after etching was removed with acetone. Furthermore, the colored coating film of the polyimide precursor was heat-treated at 240 ° C. for 30 minutes to be converted into polyimide. As described above, the black matrix pattern was formed. Next, a green paste produced by a spinner was applied, and the green pattern was formed by etching and heat treatment as in the above black matrix pattern. Subsequently, a red paste and a blue paste were applied in the same manner, and a red pattern and a blue pattern were formed by etching and heat treatment to obtain a color filter. The film thicknesses of the red, green and blue patterns were all 3.5 μm. Further, an overcoating agent “Optomer” (SS6917 + SS0917) manufactured by JSR Corporation was formed into a film of 1 μm on the obtained color filter, and an ITO film was further sputtered thereon to a film thickness of 0.14 μm.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.675, 0.316) and green (0.201, 0.6), respectively.
82) and blue (0.145, 0.045), and the color reproduction range was 101.9% of the NTSC standard. Also,
At that time, the brightness Y of the color filter was 13.7 and the contrast was 550. The average particle size of each color pixel pigment measured from the sectional SEM photograph of the obtained color filter was 55 nm for red pixels, 70 nm for green pixels, and 90 nm for blue pixels.

Separately, a TFT element on non-alkali glass,
A substrate on which pixel electrodes and the like were formed was prepared as a counter substrate, and an alignment film was printed and rubbed on the substrate (colored layer substrate) coated with the color paste and the counter substrate to orient. A sealant in which microrods were kneaded was printed on one of these two substrates, a bead spacer having a thickness of 5 μm was dispersed, and then the two substrates were bonded together. Next, TN liquid crystal (refractive index anisotropy Δn to 0.1) compatible with 4 V driving was injected to close the liquid crystal injection port with a sealing agent. A liquid crystal cell filled with liquid crystal was sandwiched between orthogonal polarizing films to prepare a liquid crystal cell for evaluation. A liquid crystal display device was completed by mounting an IC driver or the like on the liquid crystal cell. As for the image quality of the obtained liquid crystal display device, a bright display similar to that of a printed matter was possible, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter with a C light source was measured in the same manner as above. 0.316), green (0.201,
0.682), blue (0.145, 0.045), and the color reproduction range was 101.9% compared to the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 2 The weight composition of the green paste pigment is PG7 / PY17 = 50 /
Red, green, and blue pastes were produced in the same manner as in Example 1 except that the amount was 50, and then a color filter was produced.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.675, 0.316) and green (0.226, 0.6), respectively.
86) and blue (0.145, 0.045), and the color reproduction range was 100.4% of the NTSC standard. Also,
At that time, the brightness Y of the color filter was 14.6 and the contrast was 550. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter was 55 nm for red pixels, 80 nm for green pixels, and 90 nm for blue pixels. With this color filter,
A liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when it was passed through the C light source was measured in the same manner as above. 0.316), green (0.226,
0.686), blue (0.145, 0.045), and the color reproduction range is 100.4% of the NTSC standard, which is the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 3 The film thicknesses of the red, green and blue patterns were 2.6 μm and 2.
A color filter was produced in the same manner as in Example 1 except that the thickness was 5 μm and 2.0 μm.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.670, 0.320) and green (0.219, 0.6), respectively.
55) and blue (0.141, 0.064), and the color reproduction range was 92.5% of the NTSC standard. The brightness Y of the color filter at that time was 17.4 and the contrast was 750. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 55 nm, the green pixel was 70 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter with a C light source was measured in the same manner as above. 0.320), green (0.219,
0.655), blue (0.141, 0.064), and the color reproduction range was 92.5% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 4 The weight composition of the pigment in the green paste was PG7 / PY15.
0 = 45/55, pigment / polymer ratio (weight ratio) is 50 /
Red, green, and blue pastes were produced in the same manner as in Example 1 except that the amount was 50. Subsequently, the red, green, and blue patterns were applied such that the film thicknesses were 2.8 μm, 2.6 μm, and 1.5 μm, respectively, and a color filter was prepared in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.249, 0.6), respectively.
56) and blue (0.143, 0.069), and the color reproduction range was 90.0% of the NTSC standard. At that time, the brightness Y of the color filter was 18.4 and the contrast was 950. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 55 nm, the green pixel was 55 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter with a C light source was measured in the same manner as above. 0.320), green (0.249,
0.656), blue (0.143, 0.069), and the color reproduction range was 90.0% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 5 The weight composition of the pigment in the green paste was PG7 / PY13.
9 = 75/25, pigment / polymer ratio (weight ratio) is 50 /
Red, green, and blue pastes were produced in the same manner as in Example 1 except that the amount was 50. Subsequently, the red, green, and blue patterns were applied so that the film thicknesses were 2.8 μm, 2.5 μm, and 1.5 μm, respectively, and a color filter was manufactured in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.288, 0.6), respectively.
86) and blue (0.143, 0.069), and the color reproduction range was 93.1% of the NTSC standard. The brightness Y of the color filter at that time was 12.0, and the contrast was 700. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 55 nm, the green pixel was 65 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.320), green (0.288,
0.686), blue (0.143, 0.069), and the color reproduction range was 93.1% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 6 The weight composition of the pigment in the green paste was PG7 / PY18.
5 = 70/30, pigment / polymer ratio (weight ratio) is 50 /
Red, green, and blue pastes were produced in the same manner as in Example 1 except that the amount was 50. Subsequently, the red, green, and blue patterns were applied so that the film thicknesses were 2.8 μm, 2.5 μm, and 1.5 μm, respectively, and a color filter was manufactured in the same manner as in Example 1. The chromaticity (x, y) of the obtained color filter when passing through the C light source is red (0.673, 0.
320), green (0.236, 0.687), blue (0.1
43, 0.069), and the color reproduction range was 97.5% of the NTSC standard. The brightness Y of the color filter at that time was 13.4 and the contrast was 520. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter was 55 n for the red pixel.
m, the green pixel was 90 nm, and the blue pixel was 90 nm.

In this way, using this color filter, a liquid crystal display device was completed in the same manner as in Example 1.
The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter with a C light source was measured in the same manner as above. 0.320), green (0.236,
0.687), blue (0.143, 0.069), and the color reproduction range is 97.5% of the NTSC standard, which is the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 7 The weight composition of the pigment in the red paste was PR254 / PR.
Example 1 except that 177 = 20/80, the weight composition of the pigment in the green paste is PG7 / PY17 = 55/45, and the pigment / polymer ratio (weight ratio) is 38/62.
Red, green and blue pastes were prepared in the same manner as in. Subsequently, the red, green, and blue patterns have film thicknesses of 2.6 μm and 2.
A color filter was produced in the same manner as in Example 1 by applying 5 μm and 1.5 μm.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.675, 0.320) and green (0.250, 0.6), respectively.
47) and blue (0.143, 0.069), and the color reproduction range was 88.7% of the NTSC standard. At that time, the brightness Y of the color filter was 20.0 and the contrast was 750. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 50 nm, the green pixel was 74 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The image quality of the obtained liquid crystal display device was close to that of a printed matter, and vivid display was possible.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when it was passed through the C light source was measured in the same manner as above. 0.320), green (0.250,
0.647), blue (0.143, 0.069), and the color reproduction range was 88.7% with respect to the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 8 The weight composition of the pigment in the red paste was PR254 / PR.
177 = 20/80, pigment / polymer ratio (weight ratio) is 4
2/58, and the weight composition of the pigment in the green paste is PG7 / PY138 / PY185 = 50/35/15,
Red, green and blue pastes were produced in the same manner as in Example 1 except that the pigment / polymer ratio (weight ratio) was 50/50. Next, the red, green, and blue patterns have a film thickness of 2.6, respectively.
A color filter was produced in the same manner as in Example 1 by applying the coating solution so as to have a thickness of μm, 2.5 μm, and 1.5 μm.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.675, 0.320) and green (0.253, 0.6), respectively.
55) and blue (0.143, 0.069), and the color reproduction range was 90.0% of the NTSC standard. At that time, the brightness Y of the color filter was 17.8 and the contrast was 550. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 50 nm, the green pixel was 78 nm, and the blue pixel was 90 nm.

Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The image quality of the obtained liquid crystal display device was close to that of a printed matter, and vivid display was possible.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.320), green (0.253,
0.655), blue (0.143, 0.069), and the color reproduction range was 90.0% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 9 The weight composition of the pigment in the green paste was PG7 / PY13.
8 / PY139 = 50/45/5, and a red / green / blue paste was prepared in the same manner as in Example 1 except that the pigment / polymer ratio (weight ratio) was 50/50. Then red, green,
The thickness of the blue pattern is 2.8 μm, 2.6 μm,
It was coated so as to have a thickness of 1.5 μm, and a color filter was produced in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.255, 0.6), respectively.
54) and blue (0.143, 0.069), and the color reproduction range was 89.3% of the NTSC standard. Further, the brightness Y of the color filter at that time was 17.2 and the contrast was 850. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 55 nm, the green pixel was 55 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The image quality of the obtained liquid crystal display device was close to that of a printed matter, and vivid display was possible.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.320), green (0.255,
0.654), blue (0.143, 0.069), and the color reproduction range was 89.3% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 10 The weight composition of the pigment in the red paste was PR177 / PY.
139 = 80/20, and the weight composition of the pigment in the green paste is PG7 / PY138 / PY139 = 50/4.
Red, green, and blue pastes were produced in the same manner as in Example 1 except that the pigment ratio was 5/5 and the pigment / polymer ratio (weight ratio) was 50/50. Subsequently, the red, green, and blue patterns were applied such that the film thicknesses were 2.4 μm, 2.6 μm, and 1.5 μm, respectively, and a color filter was prepared in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.255, 0.6), respectively.
54) and blue (0.143, 0.069), and the color reproduction range was 89.3% of the NTSC standard. At that time, the brightness Y of the color filter was 17.0 and the contrast was 800. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 65 nm, the green pixel was 55 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The image quality of the obtained liquid crystal display device was close to that of a printed matter, and vivid display was possible.

The obtained display device was disassembled, a color filter with an alignment film was taken out, and the chromaticity of the color filter when it was passed through a C light source was measured in the same manner as above. 0.320), green (0.255,
0.654), blue (0.143, 0.069), and the color reproduction range was 89.3% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 11 The weight composition of the pigment in the red paste was PR254 / PR.
Red, green and blue pastes were produced in the same manner as in Example 5 except that 139 = 80/20 and the pigment / polymer ratio (weight ratio) of the blue paste was 25/75. Then red, green,
The thickness of the blue pattern is 2.6 μm, 2.5 μm,
It was coated so as to have a thickness of 1.7 μm, and a color filter was produced in the same manner as in Example 5.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.662, 0.337) and green (0.288, 0.6), respectively.
86) and blue (0.142, 0.062), and the color reproduction range was 89.9% of the NTSC standard. At that time, the brightness Y of the color filter was 13.2 and the contrast was 680. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 65 nm, the green pixel was 65 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 5. The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when it was passed through the C light source was measured in the same manner as above. 0.337), green (0.288,
0.686), blue (0.142, 0.062), and the color reproduction range was 89.9% compared to the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 12 The weight composition of the pigment in the green paste was PG7 / PY1.
Red, green, and blue pastes were produced in the same manner as in Example 11 except that 39 / PY150 = 65/10/25.
Next, the red, green, and blue patterns have film thicknesses of 2.6μ each.
m, 2.5 μm and 1.7 μm, and a color filter was produced in the same manner as in Example 11.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.662, 0.337) and green (0.265, 0.6), respectively.
79) and blue (0.142, 0.062), and the color reproduction range was 90.7% of the NTSC standard. The brightness Y of the color filter at that time was 15.4 and the contrast was 740. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 65 nm, the green pixel was 60 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 5. The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.337), green (0.265,
0.679), blue (0.142, 0.062), and the color reproduction range was 90.7% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 13 E. Preparation of pigment dispersion using acrylic polymer Pigment Red PR254 5.4 g (6% of the total pigment)
0 wt%), Pigment Red PR177 3.6 g
(40 wt%) and "EFKA" 4 made by EFKA as a dispersant
7 (35% solution) 5.14 g, as an acrylic polymer, "Cyclomer" ACA250 (4 manufactured by Daicel Chemical Industries, Ltd.
5% solution) 4.0 g and propylene glycol monomethyl ether acetate 71.86 g were charged together with glass beads 90 g, and a homogenizer was used.
After dispersing at 000 rpm for 5 hours, filter the glass beads,
Removed. Thus the pigments PR254 and PR177
To obtain a 14% dispersion liquid.

F. Preparation of Photosensitive Acrylic Color Paste Acrylic polymer "Cyclomer" ACA250 (45% solution) manufactured by Daicel Chemical Co., Ltd. was added to 60 g of the dispersion liquid.
g, Nippon Kayaku's polyfunctional monomer "Kayarad" DPHA
A solution obtained by diluting 1.8 g of 1.8 g of photoinitiator "Irgacure" 369 manufactured by Ciba Specialty Chemicals with 29.74 g of propylene glycol monomethyl ether acetate, 40 g in total, and mixed, and further
Chemie's surfactant "BYK361" was added to 1000 ppm of the total solid content to obtain a red paste. The pigment / polymer ratio (weight ratio) of this paste is 4
It is 0/60. Further, similarly to the red paste, a green paste having a pigment weight composition of PG7 / PY17 = 65/35 and a pigment / polymer ratio (weight ratio) = 46/54, P
A blue paste having B15: 6 / PV23 = 80/20 and a pigment / polymer ratio (weight ratio) = 28/72 was prepared.

G. Preparation and Evaluation of Colored Coating Film First, a black color paste was applied in the same manner as in Example 1 to form a black matrix. Next, apply the above red paste on it with a spinner and then at 80 ° C for 15
A red paste coating film was obtained by heat treatment for minutes. Further, a predetermined area is exposed through a negative mask, and "Emulgen" A-60 (HLB12.8, polyoxyethylene derivative)) (manufactured by Kao Corporation) is added to a 0.2% diethylaminoethanol aqueous solution as a nonionic surfactant. A patterning substrate was obtained by immersing in an alkali developing solution added with 0.1% of the total amount of the developing solution for 90 seconds while oscillating, developing, and then washing with pure water. By holding the obtained patterned substrate in a hot air oven at 200 ° C. for 30 minutes, the acrylic resin was cured and a colored pattern was obtained. Subsequently, in the same manner, green and blue pastes were applied and patterns were formed to obtain color filters. The film thicknesses of the red, green and blue patterns were all 3.5 μm. Further, on the obtained color filter, 1 overcoat agent "Optomer" (SS6917 + SS0917) manufactured by JSR Corporation was applied.
A film with a thickness of 0.14μ is formed on the ITO film.
Sputtering was performed so as to obtain m.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.675, 0.316) and green (0.201, 0.6), respectively.
82) and blue (0.145, 0.045), and the color reproduction range was 101.9% of the NTSC standard. Also,
At that time, the brightness Y of the color filter was 13.7 and the contrast was 550. The average particle size of each color pixel pigment measured from the sectional SEM photograph of the obtained color filter was 55 nm for red pixels, 70 nm for green pixels, and 90 nm for blue pixels.

Separately, a TFT element on non-alkali glass,
A substrate on which pixel electrodes and the like were formed was prepared as a counter substrate, and an alignment film was printed and rubbed on the substrate (colored layer substrate) coated with the color paste and the counter substrate to orient. A sealant in which microrods were kneaded was printed on one of these two substrates, a bead spacer having a thickness of 5 μm was dispersed, and then the two substrates were bonded together. Next, TN liquid crystal (refractive index anisotropy Δn to 0.1) compatible with 4 V driving was injected to close the liquid crystal injection port with a sealing agent. A liquid crystal cell filled with liquid crystal was sandwiched between orthogonal polarizing films to prepare a liquid crystal cell for evaluation. A liquid crystal display device was completed by mounting an IC driver or the like on the liquid crystal cell. As for the image quality of the obtained liquid crystal display device, a bright display similar to that of a printed matter was possible, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.316), green (0.201,
0.682), blue (0.145, 0.045), and the color reproduction range was 101.9% compared to the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 14 The weight composition of the pigment in the red paste was PR254 / P.
Red, green and blue pastes were produced in the same manner as in Example 1 except that R122 = 70/30. Next, the red, green, and blue patterns have film thicknesses of 3.5 μm, 3.5 μm,
It was applied so as to have a thickness of 3.5 μm, and a color filter was produced in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.675, 0.321) and green (0.201, 0.6), respectively.
82) and blue (0.145, 0.045), and the color reproduction range was 101.8% of the NTSC standard. Also,
At that time, the brightness Y of the color filter was 13.5 and the contrast was 510. The average particle size of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter was 77 nm for red pixels, 70 nm for green pixels, and 90 nm for blue pixels. With this color filter,
A liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.321), green (0.201,
0.682), blue (0.145, 0.045), and the color reproduction range was 101.8% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 15 The weight composition of the pigment in the red paste was PR254 / P.
Red, green and blue pastes were produced in the same manner as in Example 5 except that R122 was 70/30. Next, the red, green, and blue patterns have film thicknesses of 2.7 μm, 2.5 μm,
It was coated so as to have a thickness of 1.5 μm, and a color filter was produced in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.666, 0.323) and green (0.288, 0.6), respectively.
86) and blue (0.143, 0.069), and the color reproduction range was 90.4% of the NTSC standard. At that time, the brightness Y of the color filter was 12.6 and the contrast was 800. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 77 nm, the green pixel was 65 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.323), green (0.288,
0.686), blue (0.143, 0.069), and the color reproduction range was 90.4% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 16 The weight composition of the pigment in the red paste was PR177 = 1.
Red, green, and blue pastes were produced in the same manner as in Example 1 except that the paste was 00. Subsequently, the red, green, and blue patterns were applied so that the film thicknesses were 3.5 μm, 3.5 μm, and 3.5 μm, respectively, and a color filter was manufactured in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.690, 0.306) and green (0.201, 0.6), respectively.
82) and blue (0.145, 0.045), and the color reproduction range was 105.1% of the NTSC standard. Also,
At that time, the brightness Y of the color filter was 12.5 and the contrast was 600. The average particle size of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter was 50 nm for red pixels, 70 nm for green pixels, and 90 nm for blue pixels. With this color filter,
A liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter with a C light source was measured in the same manner as above. 0.306), green (0.201,
0.682), blue (0.145, 0.045), and the color reproduction range was 105.1% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 17 The weight composition of the pigment in the red paste was PR177 = 1.
Red, green, and blue pastes were produced in the same manner as in Example 5 except that the amount was 00. Subsequently, the red, green, and blue patterns were applied so that the film thicknesses were 2.7 μm, 2.5 μm, and 1.5 μm, respectively, and a color filter was prepared in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.678, 0.306) and green (0.288, 0.6), respectively.
86) and blue (0.143, 0.069), and the color reproduction range was 93.5% of the NTSC standard. The brightness Y of the color filter at that time was 11.5 and the contrast was 950. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 50 nm, the green pixel was 65 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.306), green (0.288,
0.686), blue (0.143, 0.069), and the color reproduction range was 93.5% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 18 The weight composition of the pigment in the green paste was PG7 / PG3.
Red, green, and blue pastes were produced in the same manner as in Example 4 except that 6 / PY150 = 40/5/55. Subsequently, the red, green and blue patterns have film thicknesses of 2.8 μm and 2.
A color filter was produced in the same manner as in Example 1 by applying 7 μm and 1.5 μm.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.253, 0.6), respectively.
56) and blue (0.143, 0.069), and the color reproduction range was 90.0% of the NTSC standard. Further, the brightness Y of the color filter at that time was 18.7 and the contrast was 1050, which was higher than that of Example 4. Section S of the obtained color filter
The average particle size of each color pixel pigment measured from the EM photograph is 55 nm for the red pixel, 55 nm for the green pixel, and 90 n for the blue pixel.
It was m. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The resulting liquid crystal display device is capable of displaying vivid colors similar to printed matter.
No display defect due to ITO disconnection was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter with a C light source was measured in the same manner as above. 0.320), green (0.253,
0.656), blue (0.143, 0.069), and the color reproduction range was 90.0% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 19 The weight composition of the pigment in the green paste was PG7 / PG3.
Red, green and blue pastes were produced in the same manner as in Example 9 except that 6 / PY138 / PY139 = 40/15/40/5. Subsequently, the red, green, and blue patterns were applied so that the film thicknesses were 2.8 μm, 2.7 μm, and 1.5 μm, respectively, and a color filter was manufactured in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.259, 0.6), respectively.
55) and blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard. Further, the brightness Y and the contrast of the color filter at that time were 17.5 and 950, respectively, and the brightness and the contrast were higher than those in Example 9. Section SE of the obtained color filter
The average particle size of each color pixel pigment measured from the M photograph is 55 nm for the red pixel, 55 nm for the green pixel, and 90 nm for the blue pixel.
Met. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device is capable of displaying a bright color close to that of a printed matter.
No display defect due to TO disconnection was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter with a C light source was measured in the same manner as above. 0.320), green (0.259,
0.655), blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 20 Red and green were prepared in the same manner as in Example 19 except that PR177 and PR254 used in the red paste and PB15: 6 used in the blue paste were of a type having a large particle size. , Blue paste was prepared. Then, the red, green, and blue patterns have film thicknesses of 2.8 μm, 2.7 μm, and 1.5, respectively.
It was coated so as to have a thickness of μm, and a color filter was produced in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.259, 0.6), respectively.
55) and blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard. Further, the brightness Y of the color filter at that time is 17.4 and the contrast is 900, which is in the practical range, but is in Example 19.
The brightness and contrast were lower. The average particle size of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter was 110 nm for red pixels and 55 n for green pixels.
m, blue pixel was 110 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.320), green (0.259,
0.655), blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 21 Red was prepared in the same manner as in Example 19 except that the PG36 used in the green paste had a large particle size.
Green and blue pastes were prepared. Subsequently, the red, green, and blue patterns have film thicknesses of 2.8 μm, 2.7 μm, and 1.5 μm, respectively.
And a color filter was prepared in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.259, 0.6), respectively.
55) and blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard. In addition, the brightness Y of the color filter at that time is 17.2 and the contrast is 750.
The brightness and contrast were lower. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter was 55 nm for the red pixel and 80 n for the green pixel.
m, blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.320), green (0.259,
0.655), blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 22 Example 19 was repeated except that PR177 and PR254 used for the red paste, PG36 used for the green paste, and PB15: 6 used for the blue paste were of a large particle size type. Red, green and blue pastes were prepared in the same manner as in. Then, the red, green, and blue patterns have film thicknesses of 2.
A color filter was produced in the same manner as in Example 1 by applying 8 μm, 2.7 μm, and 1.5 μm.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.259, 0.6), respectively.
55) and blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard. In addition, the brightness Y of the color filter at that time was 16.9 and the contrast was 510, which is in the practical range, but is in Example 19.
The brightness and contrast are much lower. The average particle diameter of each color pixel pigment measured from the sectional SEM photograph of the obtained color filter was 110 nm for red pixels, 105 nm for green pixels, and 110 nm for blue pixels. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device was capable of displaying a bright color similar to that of a printed matter, and no display defect due to a breakage of ITO was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.320), green (0.259,
0.655), blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 23 The same as Example 19 except that PG36 sulfonic acid derivative and PB15: 6 sulfonic acid derivative were added as a dispersant having a pigment derivative structure in such a manner as to replace 3 wt% of each pigment total amount. To produce red, green and blue pastes.

A compound having a sulfonic acid derivative structure introduced into the pigment structure was prepared as follows. That is, while stirring 6 g of pigment, fuming sulfuric acid (25% SO ₃ ) at 15 ° C.
It was put into 78 g. After stirring for 3 hours, the mixture was added onto 150 g of ice. After standing for 30 minutes, the resulting suspension was filtered and the product obtained was washed with 30 ml of water. The product was put into 200 ml of water and neutralized with an aqueous ammonia solution (adding an aqueous ammonia solution until the pH reached 7). 45 g of ammonium chloride was added and stirred at 80 ° C. for 30 minutes, and the deposited precipitate was filtered at 60 ° C. The obtained wet crystals were washed with water and then dried at 80 ° C. to obtain 10 g of a pigment sulfonic acid derivative.

Subsequently, the red, green, and blue patterns were applied so that the film thicknesses were 2.8 μm, 2.7 μm, and 1.5 μm, respectively, and a color filter was prepared in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.259, 0.6), respectively.
55) and blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard. Further, the brightness Y of the color filter at that time was 17.7 and the contrast was 1050, and the brightness and the contrast were improved as compared with Example 19. Section S of the obtained color filter
The average particle size of each color pixel pigment measured from the EM photograph is 55 nm for the red pixel, 55 nm for the green pixel, and 90 n for the blue pixel.
It was m. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The resulting liquid crystal display device is capable of displaying vivid colors similar to printed matter.
No display defect due to ITO disconnection was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when it was passed through the C light source was measured in the same manner as above. 0.320), green (0.259,
0.655), blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 24 In addition to PG36 sulfonic acid derivative and PB15: 6 sulfonic acid derivative, PR177 sulfonic acid derivative and PR254 sulfonic acid derivative prepared in the same manner as in Example 23 were used as a dispersant having a pigment derivative structure. Then, red, green and blue pastes were produced in the same manner as in Example 23, except that 3 wt% of the total amount of each pigment was added in the form of replacement.

Subsequently, the red, green, and blue patterns were applied so that the film thicknesses were 2.8 μm, 2.7 μm, and 1.5 μm, respectively, and a color filter was prepared in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.259, 0.6), respectively.
55) and blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard. Further, the brightness Y of the color filter at that time was 17.8 and the contrast was 1100, and the brightness and the contrast were improved as compared with Example 23. Section S of the obtained color filter
The average particle size of each color pixel pigment measured from the EM photograph is 55 nm for the red pixel, 55 nm for the green pixel, and 90 n for the blue pixel.
It was m. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The resulting liquid crystal display device is capable of displaying vivid colors similar to printed matter.
No display defect due to ITO disconnection was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.320), green (0.259,
0.655), blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Example 25 As a dispersant having a pigment derivative structure, PG36 sulfonic acid derivative, PB15: 6 sulfonic acid derivative, PR177
In addition to the sulfonic acid derivative and the PR254 sulfonic acid derivative, the PY138 sulfonic acid derivative prepared in the same manner as in Example 23 was further added in the form of replacing 3 wt% of the total amount of each pigment. To produce red, green and blue pastes.

Subsequently, the red, green and blue patterns were applied so that the film thicknesses were 2.8 μm, 2.7 μm and 1.5 μm, respectively, and a color filter was prepared in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.259, 0.6), respectively.
55) and blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard. Further, the brightness Y of the color filter at that time was 17.9 and the contrast was 1170, and the brightness and contrast were improved as compared with Example 24. Section S of the obtained color filter
The average particle size of each color pixel pigment measured from the EM photograph is 55 nm for the red pixel, 55 nm for the green pixel, and 90 n for the blue pixel.
It was m. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The resulting liquid crystal display device is capable of displaying vivid colors similar to printed matter.
No display defect due to ITO disconnection was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when it was passed through the C light source was measured in the same manner as above. 0.320), green (0.259,
0.655), blue (0.143, 0.069), and the color reproduction range was 89.1% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Comparative Example 1 The weight composition of the pigment in the red paste was PR254 / PR.
177 = 20/80, red in the same manner as in Example 1 except that the weight composition of the pigment in the green paste is PG7 / PY138 = 30/70 and the pigment / polymer ratio (weight ratio) is 52/48. Green and blue pastes were prepared. Subsequently, the red, green, and blue patterns have film thicknesses of 2.6 μm and 1.
A color filter was produced in the same manner as in Example 1 by applying 6 μm and 1.7 μm.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.675, 0.320) and green (0.288, 0.5), respectively.
87) and blue (0.142, 0.062), and the color reproduction range was 76.5% of the NTSC standard. At that time, the brightness Y of the color filter was 25.0 and the contrast was 1100. The average particle diameter of each color pixel pigment measured from the sectional SEM photograph of the obtained color filter was 50 nm for red pixels, 65 nm for green pixels, and 90 nm for blue pixels. With this color filter,
A liquid crystal display device was completed in the same manner as in Example 1. The image quality of the obtained liquid crystal display device was bright, but it could not be said that the display was equivalent to that of a printed matter because the color reproducibility of green was insufficient. No display defect due to ITO disconnection was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.320), green (0.288,
0.587), blue (0.142, 0.062), and the color reproduction range was 76.5% compared to the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Comparative Example 2 The weight composition of the pigment in the red paste was PR254 / PR.
177 = 20/80, red in the same manner as in Example 1 except that the weight composition of the pigment in the green paste is PG7 / PY138 = 20/80 and the pigment / polymer ratio (weight ratio) is 52/48. Green and blue pastes were prepared. Subsequently, the film thicknesses of the red, green, and blue patterns are 2.6 μm and 5.
A color filter was produced in the same manner as in Example 1 by applying 0 μm and 1.7 μm. However, the green pattern had a large taper due to its thick film thickness, and it was difficult to form a fine pattern. In addition, ITO caused by a large step at the edge of the green pattern portion
Was broken.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.675, 0.320) and green (0.257, 0.6), respectively.
54) and blue (0.142, 0.062), and the color reproduction range was 90.3% of the NTSC standard. Further, the brightness Y of the color filter at that time was 18.2 and the contrast was 420. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 50 nm, the green pixel was 60 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device was capable of displaying a vivid color equivalent to that of a printed matter, but a display defect due to disconnection of ITO was observed, which was insufficient as a display device.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter with a C light source was measured in the same manner as above. 0.320), green (0.257,
0.654), blue (0.142, 0.062), and the color reproduction range was 90.3% of the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Comparative Example 3 The weight composition of the pigment in the red paste was PR254 / PR.
177 = 20/80, red in the same manner as in Example 1 except that the weight composition of the pigment in the green paste is PG36 / PY17 = 55/45 and the pigment / polymer ratio (weight ratio) is 38/62. Green and blue pastes were prepared. Subsequently, the red, green, and blue patterns have film thicknesses of 2.6 μm and 2.
A color filter was produced in the same manner as in Example 1 by applying 5 μm and 1.5 μm.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.675, 0.320) and green (0.311, 0.6), respectively.
15) and blue (0.143, 0.069), and the color reproduction range was 78.5% with respect to the NTSC standard. At that time, the brightness Y of the color filter was 24.1 and the contrast was 780. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 50 nm, the green pixel was 75 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The image quality of the obtained liquid crystal display device was bright, but it could not be said that the display was equivalent to that of a printed matter because the color reproducibility of green was insufficient. No display defect due to ITO disconnection was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter with a C light source was measured in the same manner as above. 0.320), green (0.311,
0.615), blue (0.143, 0.069), and the color reproduction range was 78.5% with respect to the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Comparative Example 4 The weight composition of the pigment in the red paste was PR254 / PR.
177 = 20/80, and the weight composition of the pigment in the green paste is PG36 / PY138 / PY139 = 50 /.
Red, green, in the same manner as in Example 1 except that it is 45/5.
A blue paste was made. Subsequently, the red, green, and blue patterns were applied so that the film thicknesses were 2.5 μm, 2.6 μm, and 1.5 μm, respectively, and a color filter was manufactured in the same manner as in Example 1.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.317, 0.6), respectively.
21) and blue (0.143, 0.069), and the color reproduction range was 78.8% of the NTSC standard. At that time, the brightness Y of the color filter was 21.3 and the contrast was 850. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 50 nm, the green pixel was 56 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The image quality of the obtained liquid crystal display device was bright, but it could not be said that the display was equivalent to that of a printed matter because the color reproducibility of green was insufficient. No display defect due to ITO disconnection was observed.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter with a C light source was measured in the same manner as above. 0.320), green (0.317,
0.621), blue (0.143, 0.069), and the color reproduction range was 78.8% compared to the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

Comparative Example 5 The weight composition of the pigment in the red paste was PR254 / PR.
177 = 20/80, and the weight composition of the pigment in the green paste is PG36 / PY138 / PY139 = 50 /.
Red, green, in the same manner as in Example 1 except that it is 45/5.
A blue paste was made. Subsequently, the red, green, and blue patterns were applied so as to have film thicknesses of 2.5 μm, 4.2 μm, and 1.5 μm, respectively, and a color filter was manufactured in the same manner as in Example 1. However, the green pattern had a large taper due to its thick film thickness, and it was difficult to form a fine pattern. In addition, disconnection of ITO was caused at the edge portion of the green pattern portion due to the large step.

The chromaticity (x, y) of the color filter thus obtained when passing through the C light source is red (0.673, 0.320) and green (0.303, 0.6), respectively.
54) and blue (0.143, 0.069), and the color reproduction range was 85.4% of the NTSC standard. At that time, the brightness Y of the color filter was 17.2 and the contrast was 520. The average particle diameter of each color pixel pigment measured from the cross-sectional SEM photograph of the obtained color filter is
The red pixel was 50 nm, the green pixel was 56 nm, and the blue pixel was 90 nm. Using this color filter, a liquid crystal display device was completed in the same manner as in Example 1. The obtained liquid crystal display device was capable of displaying a color as bright as a printed matter, but a display defect due to a breakage of ITO was observed, and it was insufficient as a display device.

The obtained display device was disassembled, the color filter with the alignment film was taken out, and the chromaticity of the color filter when passing through the C light source was measured in the same manner as above. 0.320), green (0.303,
0.654), blue (0.143, 0.069), and the color reproduction range was 85.4% with respect to the NTSC standard, which was the same result as above. Moreover, the same results were obtained for the brightness, contrast, and pigment particle size.

The results of the above Examples and Comparative Examples are shown in Tables 1 and 2,
It is summarized in Table 3. According to the present invention, 80% of the NTSC standard
As described above, it is understood that good display is possible when the pixel film thickness is 4 μm or less.

[0168]

[Table 1]

[0169]

[Table 2]

[0170]

[Table 3]

[0171]

As described above, the color filter of the present invention and the liquid crystal display device using the same can provide an excellent display having the same color vividness as that of the printed matter and no defects such as ITO disconnection.

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2H048 BA02 BA45 BA47 BA48 BB02                       BB42                 2H091 FA02Y FB02 FB13 GA09                       GA11 GA13 LA12 LA15 LA17

Claims (12)

[Claims] 1. An area of a triangle connecting red, green, and blue chromaticity coordinates in an XYZ color system chromaticity diagram measured using a C light source is 80% or more of the NTSC standard, and each A color filter having a pixel film thickness of 4 μm or less. 2. A chromaticity coordinate (x, y) in an XYZ color system chromaticity diagram measured using a C light source is 0.635 ≦ x.
The color filter according to claim 1, wherein the color filter has red pixels satisfying the respective expressions of ≦ 0.695 and 0.300 ≦ y ≦ 0.350. 3. The chromaticity coordinate (x, y) in the XYZ color system chromaticity diagram measured using a C light source is 0.190 ≦ x.
The color filter according to claim 1, further comprising a green pixel satisfying each of the formulas ≦ 0.320 and 0.580 ≦ y ≦ 0.687. 4. A chromaticity coordinate (x, y) in an XYZ color system chromaticity diagram measured using a C light source is 0.130 ≦ x.
The color filter according to any one of claims 1 to 3, wherein the color filter has a blue pixel satisfying the respective expressions of ≤0.160 and 0.040≤y≤0.100. 5. The color filter according to claim 1, further comprising Pigment Red 177 and / or Pigment Red 254 as a coloring component of the red pixel. 6. The color filter according to claim 1, wherein Pigment Green 7 is included as a coloring component of the green pixel. 7. The color filter according to claim 6, wherein Pigment Green 36 is included as a coloring component of the green pixel. 8. A pigment yellow 17, pigment yellow 138, pigment yellow 139, pigment yellow 150, PY18 as a coloring component of a green pixel.
The color filter according to any one of claims 1 to 7, comprising at least one selected from 5. 9. The color filter according to claim 1, which contains Pigment Blue 15: 6 and Pigment Violet 23 as a coloring component of the blue pixel. 10. The average particle diameter of the pigment contained in the red and green pixels is 100 nm or less, and the average particle diameter of the pigment contained in the blue pixel is 200 nm or less. The color filter described in Crab. 11. The color filter according to claim 1, further comprising a polyimide resin as a resin component of each pixel. 12. A liquid crystal display device using the color filter according to claim 1.