JP2001337218A - Color filter, method for manufacturing color filter and liquid crystal panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive color filter substrate with high reliability in which the color balance of red, green and blue colors on the display screen does not change even when the observation angle by an observer to the display screen is changed, and moreover, to provide a method for manufacturing the aforementioned substrate, and a liquid crystal panel excellent in color display characteristics by using that color filter substrate. SOLUTION: The color filter, the method for manufacturing the color filter and the liquid crystal panel have such features that when the weight of each color material included in the three color pixels is compared in the color filter having three color pixels of red, green and blue pixels, the weight of the color material in the green pixel is heaviest and is 2 to 4 times as the weight of the color material included in the smallest amount.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter substrate mainly used for a liquid crystal display, a method of manufacturing the substrate, and a liquid crystal panel using the substrate.

[0002]

2. Description of the Related Art In recent years, the development of personal computers,
In particular, with the development of portable personal computers, the demand for liquid crystal displays, especially color liquid crystal displays, tends to increase. However, cost reduction is required for further widespread use, and in particular, there is an increasing demand for cost reduction for color filters having a high specific gravity in terms of cost.

Various proposals have been made for a method of reducing the cost of a color filter. Among them, one of the promising methods is disclosed in JP-A-59-75205, JP-A-63-235901 and JP-A-1-21730
Attention has been paid to a method that employs an ink jet recording method for forming a colored translucent portion, as proposed in Japanese Patent Application Laid-Open Publication No. 2 (1993) -210, for example.

In the ink jet system, ink is ejected as ink droplets from an ink ejection port, and the ink is adhered to a desired colored portion for coloring. A fine arrangement of a large number of fine pixels is accurately and It has the advantage that it can be formed at high speed. Further, the formation of each of the red, green, and blue colored layers can be performed at a time, and further, since the ink only needs to be applied to the pixel forming portion, waste of the ink can be reduced, and the productivity and cost can be greatly improved. Can be reduced.

[0005]

In order to provide sufficient color reproducibility as a color filter, it is natural that the optical density of each color pixel must be sufficiently high.
Further, it is necessary to ensure the uniformity of the optical density in the pixel. Even if the density at the center of the pixel is sufficiently high, the color reproducibility as a color filter will be poor if the density is low at the peripheral portion within the pixel. In order to realize such uniform optical density in the pixel, it is preferable to uniformly diffuse the coloring material given to each pixel to every corner of the pixel portion surrounded by the non-colored portion.

However, by the ink jet method,
When applying ink to the colored pixel portion, depending on the pixel,
In some cases, the color material is not uniformly diffused in the pixel portion, and a density difference may occur between a central portion of the pixel and a peripheral portion in the pixel. The following two reasons can be considered as a reason why such a phenomenon occurs. (1) Aggregation of dye or pigment due to insufficient permeability of the ink in the pixel. (2) Difference in diffusion rate of each dye or pigment as a color material.

According to the study of the present inventors, the above-mentioned phenomenon is most frequently observed in the green pixel area, then in the red pixel area, and this phenomenon is used for forming pixels. It has been found that it largely depends on the properties of the coloring material contained in the ink to be used. This is probably because the color material used in the green ink generally has a large molecular weight, so that the molecules are difficult to move, and as a result, the diffusing ability is inferior. It was also confirmed that the above phenomenon became more remarkable when an ink receiving layer was previously formed on the colored portion and pixels were formed by applying ink to the receiving layer. Further, the same tendency is observed not only in this case but also in the case where an image is formed by directly applying the curable ink onto the substrate.

According to further studies by the present inventors, pixels having a difference in color material density between the central portion and the peripheral portion, and pixels having a uniform color material density between the central portion and the peripheral portion are obtained. When the mixed color filters are applied to, for example, a liquid crystal panel, when the observer changes the viewing angle with respect to the display screen, the color balance of red, green, and blue on the display screen greatly changes. A phenomenon was observed. Accordingly, it has been recognized that the difference in the distribution unevenness of the color material between the pixels of each color of the color filter is a technical problem that must be solved in order to obtain a higher quality liquid crystal panel.

[0009]

The above objects are achieved by the present invention described below. That is, the present invention relates to a color filter having three colored pixels of a red pixel, a green pixel, and a blue pixel, and comparing the weight of the color material contained in the three colored pixels with the color material included in the green pixel. A color filter, a method for manufacturing a color filter, and a liquid crystal panel, wherein the weight of the color material is the largest and the weight of the color material included is in the range of 2 to 4 times the weight of the color material. It is in.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to preferred embodiments. The present inventors have conducted intensive studies to solve the above-mentioned problems of the conventional technology, and as a result, by adjusting the weight of the color material included in each pixel portion to a specific state, the color balance due to the change of the observation angle is adjusted. The present inventors have found that the fluctuations of the above are effectively prevented and completed the present invention. That is,
In particular, when an ink receiving layer is formed in advance on a colored portion of a substrate on which a pixel is to be formed, and ink is applied to the receiving layer to form a pixel, the optical center of the pixel as described above is used. The weight of the color material included in a pixel having a high density and a low density in a peripheral portion (a pixel having a density difference between the center of the pixel and the peripheral portion in the pixel) is equal to the weight of the color material in the other pixels. By increasing the number in comparison, it is possible to improve the density in the peripheral portion in the pixel, and as a result, even if the observation angle of the observer with respect to the display screen changes, red, It was found that the fluctuation of the green and blue color balance was effectively suppressed.

Further, without being limited to the above, even when a curable ink is applied directly on a substrate to form a pixel, the optical density of the central portion of the pixel is high and the density of the peripheral portion is low. If the weight of the coloring material included in the pixel (a pixel having a density difference between the central portion of the pixel and the peripheral portion in the pixel) is increased as compared with the weight of the coloring material in the other pixels, the ink becomes It was found that the ink was easily wetted, so that the ink could be spread to the peripheral portion of the pixel, and the variation of the color balance due to the change in the viewing angle of the observer with respect to the display screen was effectively suppressed, as in the case described above.

Further, the weight of the color material contained in the pixel in which a density difference occurs between the central portion of the pixel and the peripheral portion in the pixel is determined by the weight of the color material contained in the pixel having the smallest color material weight. It has been found that, if the value is twice or more, the change in color balance due to the change in the observation angle with respect to the display screen of the observer is suppressed. However, if the weight difference of the color material between the pixels becomes too large, it may be difficult to control the transmittance of the liquid crystal by the voltage. Therefore, the density difference between the central part of the pixel and the peripheral part in the pixel is difficult. It is preferable that the weight of the coloring material contained in the pixel such that the pixel weight is not more than four times the weight of the coloring material contained in the pixel which is the smallest.

The color filter of the present invention will be described in more detail. The color filter of the present invention is a color filter having three colored pixels of a red pixel, a green pixel, and a blue pixel, the color included in the green pixel when the weight of the color material included in the three colored pixels is compared. It is characterized by the heaviest weight of the material.

FIG. 1 is a schematic sectional view showing one embodiment of a method for manufacturing a color filter according to the present invention. First, a transparent substrate is used as the substrate 1 used for the color filter of the present invention, but a glass substrate is generally used. However, other materials can be used as long as they satisfy required characteristics such as transparency and mechanical strength as a color filter substrate.

Next, a black matrix 2 is formed on the transparent substrate 1 as required. The black matrix is not particularly limited, and any known black matrix can be used. For example, by forming a laminated thin film of a metal such as chromium or a metal oxide provided on a glass substrate and etching it in a pattern, or by patterning a black resist applied on the substrate, a black matrix is formed on the substrate. Can be provided.

Next, in the example shown in FIG. 1, an ink receiving layer 3 is formed on the substrate 1. As a method for forming the ink receiving layer 3, for example, a coating liquid prepared by dissolving or dispersing a forming material for the ink receiving layer in an appropriate solvent,
After coating by a method such as spin coating, roll coating, bar coating, spray coating, or dip coating, the solvent is evaporated by baking using an oven, a hot plate, or the like to form a coating. The thickness of the ink receiving layer 3 that can be formed in this manner is 0.1 to 20 μm.
It is appropriate that

As a material for forming the ink receiving layer 3 which can be used in the color filter of the present invention, it is necessary that the material has ink receiving ability, is excellent in dot definition, and is excellent in transparency. Process resistance such as adhesion to the transparent substrate 1 described above or the protective layer 6 described later and heat resistance are also required. Materials having such characteristics include:
A resin that cures by light irradiation or light irradiation and heating to lose or reduce the ink receiving ability can be preferably used. Examples of such a material include an acrylic resin, an epoxy resin, a silicone resin, a cellulose derivative such as hydroxypropylcellulose, hydroxyethylcellulose, methylcellulose, carboxymethylcellulose, or a modified product thereof.

Next, red, green, and blue colored inks are applied to the ink receiving layer 3 by an ink-jet method in accordance with a predetermined coloring pattern to form pixels. The color filter of the present invention, when comparing the weight of the color material contained in three colored pixels of red pixel, green pixel and blue pixel,
It is characterized in that the weight of the coloring material contained in the green pixel is the largest. To this end, each colored pixel is formed of three colored inks of red ink, green ink, and blue ink, and the weight of the coloring material in each ink is calculated as follows: green ink> red ink>
More preferably, the ink is arranged in the order of blue ink.

Specifically, first, when comparing the red, green, and blue color inks, the color material having the largest weight of the green ink in the ink is used. As specific color inks, for example, a green ink having a concentration range of 5 to 20% by weight of a color material in the ink is used, and a red ink having a concentration range of a color material in the ink of 3% by weight. It is preferable to use an ink having a color material concentration of 2 to 8% by weight as the blue ink. In addition, when the color material amounts in the red, green, and blue color inks are compared, the color material weight in the ink is the largest for the green ink, and then the color material amount for the red ink is used next. Is preferred.

As described above, when it is necessary to use an ink containing a larger amount of a color material than other inks, it is more preferable to use a high-colored color material as the ink color material. It is preferable to use a coloring material having inferior coloring. As the ink that can be used for forming the color filter substrate of the present invention, any of dye-based ink and pigment-based ink can be used, and both liquid ink and solid ink can be used.

Further, the ink used in the present invention preferably has a lower surface tension and a lower viscosity in consideration of the spread of the ink in the pixel. However, in order to prevent color mixing between adjacent pixels, the ink used at 25 ° C. Has a surface tension of 40 dyne / cm or more,
It is preferable to use an ink having a viscosity of 2.5 cps or more.

It is preferable that the ink used in the present invention has a dye and / or a pigment as a coloring material and further has a liquid medium for dissolving or dispersing the coloring material. Water or an organic solvent can be used as the liquid medium. As the organic solvent, for example, methyl alcohol, ethyl alcohol, n-propyl alcohol,
Isopropyl alcohol, n-butyl alcohol, se
C1-C4 alkyl alcohols such as c-butyl alcohol and tert-butyl alcohol; amides such as dimethylformamide and dimethylacetamide; ketones and keto alcohols such as acetone and diacetone alcohol; ethers such as tetrahydrofuran and dioxane Polyalkylene glycols such as polyethylene glycol and polypropylene glycol; alkylene groups such as ethylene glycol, propylene glycol, butylene glycol, triethylene glycol, 1,2,6-hexanetriol, thiodiglycol, hexylene glycol and diethylene glycol having 2 Alkylene glycols containing up to 6 carbon atoms; glycerin; ethylene glycol monomethyl (or ethyl) ether, diethylene glycol methyl ( Ethyl) ether, triethylene glycol monomethyl (or ethyl) ether,
And the like. Lower alkyl ethers of polyhydric alcohols such as N-methyl-2-pyrrolidone, 2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone and the like can be used.

After applying red, green and blue colored inks to desired positions of the ink receiving layer 3 as described above,
The pixels are formed by curing the ink receiving layer. As a curing method, light irradiation or heat treatment suitable for the cured resin used as the material for forming the ink receiving layer, or both of them may be used. For example, as the heat treatment, baking may be performed at 150 to 200 ° C. for about 1 to 120 minutes using an oven, a hot plate, or the like.

In the color filter substrate of the present invention, as shown in FIG. 1, if necessary, a protective layer 6 may be formed on the ink receiving layer. The protective layer 6 can be formed by using a resin material curable by light irradiation or heat treatment, or both, or an inorganic film formed by vapor deposition or sputtering.
These protective layers 6 are not limited as long as they do not impair the transparency required for the color filter when formed into a color filter, and can withstand the subsequent ITO forming process, alignment film forming process, and the like. Can be used.

The color filter of the present invention is not limited to the mode in which the ink receiving layer is provided as described above, and may be a color filter in which each color pixel is formed without forming the ink receiving layer. In this case, a red, green, and blue colored ink containing a resin material curable by light irradiation or heat treatment, or both, is used, and the ink is applied to a substrate on which a black matrix is formed. Pixels are formed by applying light directly on the top and then curing the ink. As the resin material used at this time, it is preferable to use a resin material which does not cause a problem such as fixation in the ink when contained in the ink. As such,
An acrylic resin, an epoxy resin, a melamine resin, or the like can be used, and the content in the ink is preferably about 0.1 to 20% based on the total amount of the ink. As the curing method, light irradiation or heat treatment suitable for the cured resin contained in the ink, or both of them may be used.
In this case, the protective film may be formed after the ink is cured.

The color filter formed as described above can be obtained, for example, by arranging the color filter 9 and the substrate 61 to face each other as shown in FIG. 2 and enclosing the liquid crystal composition 62 therebetween. It can be a liquid crystal panel. FIG. 2 shows a T filter incorporating the color filter of the present invention.
FIG. 1 is a cross-sectional view of an FT color liquid crystal panel. Such a color liquid crystal panel is obtained by aligning a substrate 61 facing a color filter 9 and sealing a liquid crystal composition 62 therebetween. In the example shown in FIG. 2, a TFT (not shown) and a transparent pixel electrode 63 are formed in a matrix inside one substrate 61 of the liquid crystal panel. A transparent opposing (common) electrode 64 is formed on the entire surface of the protective layer 6 of the color filter 9. Further, an alignment film 65 is formed on the inner surface of the counter substrate 61 so as to cover the pixel electrode 63.
Are formed, and an alignment film 66 is also formed on the inner surface of the counter electrode 64. By subjecting these alignment films to a rubbing treatment, liquid crystal molecules can be aligned in a certain direction. In this case, the transparent conductive film (generally, ITO
The method and material for forming the film) and the alignment film are not particularly limited, and known materials can be used. Rubbing may be appropriately performed by a known method.

The liquid crystal panel prepared as described above is
A polarizing plate 67 is adhered to the outside of the color filter substrate 1 and the counter substrate 61. Generally, a backlight in which a fluorescent lamp and a scattering plate are combined is used to reduce the transmittance of the liquid crystal compound to the light 68 of the backlight. The display can be performed by functioning as an optical shutter that changes the angle. Of course, the liquid crystal panel of the present invention is not limited to the above embodiment,
Black matrix on array type liquid crystal panel,
A color filter on array type liquid crystal panel may be used. The liquid crystal panel of the present invention thus configured is
It is widely used as an image display device such as a general-purpose computer.

[0028]

[Example 1] First, a glass substrate ("7059" manufactured by Corning Incorporated) was washed by a conventional method, and a metal chromium having a thickness of 0.2 µm was deposited thereon and patterned to form a black matrix. did. An aqueous solution of hydroxypropylcellulose (“HPC-L” manufactured by Nippon Soda Co., Ltd.) was applied thereon by a roll coater method so as to have a dry film thickness of 5 μm, and baked in an oven at 120 ° C. for 3 minutes to form an ink. A receiving layer was formed. The ink receiving layer formed as described above is ejected in an amount of 20 n by an ink jet recording apparatus of a type in which ink is foamed by thermal energy and ejected according to a predetermined coloring pattern.
g, each color ink having the following composition was applied and colored at a discharge pitch of 20 μm to form a color filter layer.

(Red ink composition) 6 parts by weight of dye (CI Acid Red 118) 10 parts by weight of ethylene glycol 4 parts by weight of isopropyl alcohol 80 parts by weight of ion-exchanged water

(Green ink composition) 8 parts by weight of dye (CI Acid Green 25) 10 parts by weight of ethylene glycol 4 parts by weight of isopropyl alcohol 78 parts by weight of ion-exchanged water

(Blue Ink Composition) 4 parts by weight of dye (CI Acid Blue 113) 10 parts by weight of ethylene glycol 4 parts by weight of isopropyl alcohol 82 parts by weight of ion-exchanged water

After the above ink is applied, the ink is heated at 200 ° C. for 30 minutes.
After baking for a minute, the entire ink receiving layer was cured.
Further, a thermosetting resin (“Hi-Coat LC-2001” manufactured by Sanyo Chemical Industries, Ltd.) is applied on the ink receiving layer by a spinner so that the dry film thickness becomes 0.5 μm.
Prebaking for 30 minutes and main baking at 200 ° C. for 30 minutes to form a protective layer, thereby producing a color filter of this example.

As a result of measuring the observation angle dependence of the obtained color filter, the color balance when observed at the position of the vertical axis of the color filter and the position where the angle of the color filter with respect to the vertical axis was around 70 ° were observed. It was confirmed that the color balance at that time was almost the same.

Example 2 A black matrix was formed on a glass substrate similar to that used in Example 1 by photolithography using a black pigment resist (“CK-S171B” manufactured by Fuji Hunt). The film thickness is 1.0 μm
And Each of the openings of the above black matrix was colored by applying colored inks of the following compositions in the same manner as in Example 1 to form a color filter layer.

(Red ink composition) 8 parts by weight of dye 5 parts by weight of resin composition 20 parts by weight of ethylene glycol 15 parts by weight of ethylene glycol monoethyl ether 2 parts by weight of isopropyl alcohol 50 parts by weight of ion-exchanged water

(Green ink composition) 10 parts by weight of dye 5 parts by weight of resin composition 20 parts by weight of ethylene glycol 15 parts by weight of ethylene glycol monoethyl ether 2 parts by weight of isopropyl alcohol 48 parts by weight of ion-exchanged water

(Blue ink composition) 5 parts by weight of dye 5 parts by weight of resin composition 20 parts by weight of ethylene glycol 15 parts by weight of ethylene glycol monoethyl ether 2 parts by weight of isopropyl alcohol 53 parts by weight of ion-exchanged water

The above dyes include, for the red ink,
C. I. Acid Red 158 and green ink are described in C.I. I. Direct Blue 86 and C.I.
I. Acid Yellow 23 toned product and blue ink are described in C.I. I. Direct Blue
86 and C.I. I. Acid Red 289 tones were used. Further, a binary copolymer of N-methylolacrylamide and methyl methacrylate was used as the resin composition in each color ink. Further, an appropriate amount of thiodiglycol was added, and each ink had a surface tension of 60 dyne / cm.
It was adjusted to be.

After applying each of the above color inks, 200 ° C.
Was performed for 1 hour, and the ink was cured to produce a color filter of this example. As a result of measuring the observation angle dependency of the color filter in the same manner as in Example 1,
No change in the color balance of the color filter due to a change in the viewing angle was observed.

Example 3 A color filter substrate was prepared in exactly the same manner as in Example 2 except that the colored inks of the following compositions were applied and colored.

(Red ink composition) 6 parts by weight of pigment 5 parts by weight of resin composition 15 parts by weight of ethylene glycol 10 parts by weight of isopropyl alcohol 64 parts by weight of ion-exchanged water

(Green ink composition) 12 parts by weight of pigment 5 parts by weight of resin composition 15 parts by weight of ethylene glycol 10 parts by weight of isopropyl alcohol 58 parts by weight of ion-exchanged water

(Blue ink composition) 5 parts by weight of pigment 5 parts by weight of resin composition 15 parts by weight of ethylene glycol 10 parts by weight of isopropyl alcohol 65 parts by weight of ion-exchanged water

As a pigment, red ink includes C.I. I. Pi
gment Red 177, and the green ink
C. I. Pigment Green 36 and blue ink include C.I. I. Pigment Blue 209, and a binary copolymer of N, N-dimethylolacrylamide and methyl methacrylate was used as the resin composition.
Further, an appropriate amount of thiodiglycol was added to adjust the surface tension of each ink to 60 dyne / cm. The observation angle dependency of the color filter was measured in the same manner as in Example 1. As a result, no change in the color balance of the color filter due to the change in the observation angle was observed.

Comparative Example 1 A color filter substrate was prepared in exactly the same manner as in Example 1 except that colored inks of the following compositions were applied and colored.

(Red ink composition) 6 parts by weight of dye (CI Acid Red 118) 10 parts by weight of ethylene glycol 4 parts by weight of isopropyl alcohol 80 parts by weight of ion-exchanged water

(Green ink composition) 7 parts by weight of dye (CI Acid Green 25) 10 parts by weight of ethylene glycol 4 parts by weight of isopropyl alcohol 79 parts by weight of ion-exchanged water

(Blue ink composition) 4 parts by weight of dye (CI Acid Blue 113) 10 parts by weight of ethylene glycol 4 parts by weight of isopropyl alcohol 82 parts by weight of ion-exchanged water

As a result of measuring the dependence of the color filter on the observation angle, the color filter gradually exhibited a purple tone from a position where the observation angle with respect to the vertical axis exceeded 50 °.

Comparative Example 2 A color filter substrate was prepared in exactly the same manner as in Example 1 except that colored inks of the following compositions were applied and colored. In addition, each dye used was the same as in Example 1. (Red, green, blue ink composition)-8 parts by weight of dye-10 parts by weight of ethylene glycol-2 parts by weight of isopropyl alcohol-80 parts by weight of ion-exchanged water As a result of measuring the observation angle dependence of the color filter,
From the position where the viewing angle of the color filter with respect to the vertical axis exceeds 40 °, the color gradually became bluish.

Comparative Example 3 A color filter substrate was prepared in exactly the same manner as in Example 2 except that colored inks of the following compositions were applied and colored. The same dyes and resin compositions as in Example 1 were used.

(Red ink composition) 8 parts by weight of dye 5 parts by weight of resin composition 20 parts by weight of ethylene glycol 15 parts by weight of ethylene glycol monoethyl ether 2 parts by weight of isopropyl alcohol 50 parts by weight of ion-exchanged water

(Green ink composition) 10 parts by weight of dye 5 parts by weight of resin composition 20 parts by weight of ethylene glycol 15 parts by weight of ethylene glycol monoethyl ether 2 parts by weight of isopropyl alcohol 48 parts by weight of ion-exchanged water

(Blue ink composition) 6 parts by weight of dye 5 parts by weight of resin composition 20 parts by weight of ethylene glycol 15 parts by weight of ethylene glycol monoethyl ether 2 parts by weight of isopropyl alcohol 52 parts by weight of ion-exchanged water

As a result of measuring the observation angle dependency of the color filter, the color filter gradually exhibited a bluish color tone from a position where the observation angle with respect to the vertical axis exceeded 50 °.

Comparative Example 4 A color filter substrate was prepared in exactly the same manner as in Example 2, except that colored inks of the following compositions were applied and colored. The same dyes and resin compositions as in Example 1 were used.

(Red ink composition) 6 parts by weight of dye 5 parts by weight of resin composition 20 parts by weight of ethylene glycol 15 parts by weight of ethylene glycol monoethyl ether 2 parts by weight of isopropyl alcohol 52 parts by weight of ion-exchanged water

(Green ink composition) 9 parts by weight of dye 5 parts by weight of resin composition 20 parts by weight of ethylene glycol 15 parts by weight of ethylene glycol monoethyl ether 2 parts by weight of isopropyl alcohol 49 parts by weight of ion-exchanged water

(Blue ink composition) 5 parts by weight of dye 5 parts by weight of resin composition 20 parts by weight of ethylene glycol 15 parts by weight of ethylene glycol monoethyl ether 2 parts by weight of isopropyl alcohol 53 parts by weight of ion-exchanged water

As a result of measuring the observation angle dependence of the color filter, the color filter gradually began to exhibit a purple tone from a position where the observation angle with respect to the vertical axis exceeded 40 °.

[0061]

[Table 1]

[0062]

As described above, according to the present invention,
A color filter substrate is provided in which the color balance of red, green, and blue on the display screen does not change even when the observer changes the viewing angle with respect to the display screen. Further, according to the present invention, by using the above-described excellent color filter substrate, a highly reliable liquid crystal element having excellent color display characteristics can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic view illustrating an example of steps of a method for manufacturing a color filter of the present invention.

FIG. 2 is a schematic sectional view showing one embodiment of a color filter substrate of the present invention.

[Explanation of symbols]

 1: transparent substrate 2: black matrix 3: ink receiving layer 6: protective layer

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Ken Miyazaki 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Katsuhiro Shiro 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon F term (for reference) 2H048 BA47 BA57 BA64 BB02 BB44 2H091 FA02Y FA35Y FC12 FC23 FD04 FD05 GA07 LA15

Claims (12)

[Claims] In a color filter having three colored pixels of a red pixel, a green pixel, and a blue pixel, when the weight of the color material included in the three colored pixels is compared, the color material included in the green pixel is determined. A color filter characterized by being in the range of 2 to 4 times the weight of the coloring material having the largest weight and containing the least coloring material. 2. The color filter according to claim 1, further comprising an ink-receiving resin layer, wherein the ink-receiving resin layer is formed with three colored pixels of red, green, and blue pixels. . 3. The color filter according to claim 1, wherein the coloring material is a dye. 4. The color filter according to claim 1, wherein the coloring material is a pigment. 5. The color pixel is formed of three color inks of red ink, green ink and blue ink, and the weight of the coloring material in each ink is in the order of green ink> red ink> blue ink. Item 5. The color filter according to any one of Items 1 to 4. 6. The color ink has a surface tension at 25 ° C. of 40.
dyne / cm (mN / m) or more and viscosity is 2.5
The color filter according to claim 5, wherein the color filter is not less than cps. 7. A method for manufacturing a color filter, comprising the steps of forming pixels of three colors of red, green and blue including a color material on a transparent substrate, wherein the color material contained in the pixels of the three colors is provided. When the weight of the color material is compared, the weight of the color material included in the green pixel is the largest, and the weight of the color material included in the green pixel is within the range of 2 to 4 times the weight of the color material of the color pixel. A method of manufacturing a color filter, wherein each pixel is formed as follows. 8. The method according to claim 1, wherein the step of applying a red ink, a green ink, and a blue ink each containing a color material included in each of the red pixel, the green pixel, and the blue pixel onto the transparent substrate by an inkjet method. Item 8. The method for manufacturing a color filter according to Item 7. 9. The method according to claim 1, wherein each of the red ink, the green ink and the blue ink containing the color material contained in each of the red pixel, the green pixel and the blue pixel is applied to the ink receiving resin layer on the transparent substrate by an ink jet method. The method for manufacturing a color filter according to claim 7, further comprising a step of providing the color filter. 10. The method for producing a color filter according to claim 8, wherein the weight of the coloring material in the ink is in the order of green ink> red ink> blue ink. 11. The red, green and blue inks each have a surface tension at 25 ° C. of 40 dyne / cm (mN
/ M) or more, and the viscosity is 2.5 cps or more. 12. A light-transmitting substrate, a color filter having colored pixels formed on the substrate, and a panel substrate disposed to face the filter, wherein a liquid crystal compound is interposed between the color filter and the panel substrate. 7. A liquid crystal panel, wherein the color filter is the color filter according to claim 1.