JPH0980224A - Manufacture of color filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the manufacture of the color filter which has no color mixture, high color reproducibility, and high surface flatness. SOLUTION: The manufacture of the color filter which has fine pixel parts of different colors on the same transparent substrate includes a process for providing a colored layer 1 formed of a visible light transparent material on the transparent substrate 3, a process for forming a coloration preventive area 5 by setting the visible light transparent material in areas other than an area that becomes a pixel of the colored layer 1, a process for coloring the area 6 which becomes the pixel by supplying coloring materials 8 of different colors by printing, and a process for setting the whole colored layer 1.

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 manufacturing method thereof, and more particularly to a color filter suitable for fine color separation of a color image pickup device, a color sensor, a liquid crystal color display and the like and a manufacturing method thereof. .

[0002]

2. Description of the Related Art In recent years, there have been increasing demands for high-definition, light-weight, and low-cost input / output elements such as color image pickup devices and color image display devices. Various elemental technologies are being developed.
In particular, the image display apparatus is undergoing a radical change in method, and a liquid crystal display which is lightweight and space-saving and suitable for carrying is rapidly becoming popular in place of the conventional mainstream CTR.

Although liquid crystal displays have become very easy to use, it cannot be said that the prices for large-area displays are sufficiently low, and various methods are being used to reduce the cost. . As an example of such a method, there is an improvement from an active matrix type liquid crystal having a TFT in each pixel to a ferroelectric liquid crystal having a switching characteristic in the liquid crystal itself, and a simple matrix type S
There are improvements in TN liquid crystal.

Another of the liquid crystal displays, which makes up a large proportion of the cost, is a color filter which is indispensable for displaying a color image. In general, this color filter divides the entire screen into a large number of fine pixels, and further divides one pixel into three, into which red,
A fine (about 100 μ or less) optical filter element that transmits green and blue is formed. By covering the space between each fine filter element with an opaque grid-like mask (black matrix), the method of improving the color reproducibility by making the black blacker and preventing the color mixture with the adjacent color is popular. are doing. As described above, since the structure of the color filter is considerably complicated and fine, there has been a big problem in manufacturing the color filter with high accuracy and at low cost.

Conventionally, as a method for producing a color filter, a mordant layer made of a hydrophilic polymer such as gelatin, casein, mulberry or polyvinyl alcohol is provided on a substrate, and the mordant layer is dyed with a dye to form a colored layer. A so-called dyeing method is known in which the forming process is repeated with three colors of red, green and blue. With this method, many dyes can be used, and it is relatively easy to respond to the spectral characteristics required as a filter, but in the dyeing process of the mordant layer, the mordant layer is immersed in a dyeing bath in which the dye is dissolved. It employs a wet process that is difficult to control.It also has complicated steps such as providing an intermediate layer for dye protection for each color, and using a photolithography process for each color for the mordant layer and patterning for dye protection. It has the disadvantage of long time and poor yield.

On the other hand, JP-A-55-134807,
JP-A-60-129707, JP-A-60-237
In the so-called pigment dispersion method, which uses a colored resin film obtained by mixing a colorant such as a pigment with a photosensitive resin as disclosed in JP 441, JP-A-61-105505, etc. Since it contains a coloring material such as a pigment from the beginning, the step of dyeing after the formation of the color filter layer is unnecessary, and therefore, the formation of an intermediate layer for dye protection is also unnecessary. Therefore, the steps are simplified by the above dyeing method. However, it is necessary to use the photolithography process for each of the three colors for patterning the colored layer, the process is complicated, and the use efficiency of the expensive photolithography resist material is low, and the material is wasted. There was a drawback.

Various methods have been proposed for forming a color filter by a simpler method, instead of such a complicated forming method. For example, the printing method is intended to form fine pixels by a high-precision printing technique such as flat plate offset printing or screen printing. The printing method is seemingly simple and promising for cost reduction, but in reality, the conventional printing method has low accuracy for high-density color displays, and it is difficult to form a color filter with high pixel density. Is.

Further, in the electrodeposition method to which electrodeposition coating is applied, a transparent electrode is required only for electrodeposition of the coloring material, and since the electrode is used, the shape of the filter pixel is restricted, and the cost is reduced and the resolution is high. The problem remains for the conversion.

[0009]

As described above,
Conventionally used dyeing methods, pigment dispersion methods, printing methods, electrodeposition methods, etc. all have problems as a method of manufacturing a color filter with high accuracy and a sufficiently flat surface for a color display and at a low cost. there were.

For example, when using a ferroelectric liquid crystal,
In many cases, the liquid crystal material itself has a considerably large refractive index anisotropy, and therefore it may be necessary to reduce the thickness of the liquid crystal cell. Is an important issue.

Further, from the viewpoint of cost, it is difficult to significantly reduce the cost by the dyeing method or the pigment dispersion method, and one of the methods that can be expected to greatly reduce the cost is the printing method. However, in the conventional printing method, the mechanical strength is still weak at the time of application, the filter layer must be formed by the ink itself, and thus the formed pattern is easily broken and the surface flatness is insufficient. As a method of flattening the surface of a color filter by a printing method, polishing (see JP-A-61-3123) or use of a spread roll (JP-A-2-2)
No. 97502 gazette) has been proposed, but the problem remains that the accuracy of the pixel pattern is reduced during the flattening.

Another method is disclosed in Japanese Patent Laid-Open No. 59-752.
A method using an inkjet method as disclosed in Japanese Patent Publication No. 05 etc. has been proposed. However, when the inkjet method is simply applied, the drawing resolution may not be sufficiently high for drawing the pixels of the color filter. Therefore, it is not easy to accurately eject inks of different colors in adjacent pixels. Also, the ink may diffuse in the ink receiving layer and mix with the adjacent pixel. In order to prevent such ink mixture (color mixture) between pixels, for example, there is a method of forming an ink repellent layer on the surface of a colored layer in a light-shielding portion between pixels in Japanese Patent Laid-Open No. 4-123005. Etc. are disclosed.
However, in this method, when it is not possible to sufficiently prevent the ink from diffusing in the colored layer and being mixed with each other, it is necessary that the colored layer colored with the ink has high etching resistance because a photolithography process is included. In this case, costs may increase due to steps such as development and cleaning, and various means for solving the problems have been studied and developed.

Therefore, an object of the present invention is to improve the low precision of pixel patterning, which is a problem thereof, while utilizing the advantages of the printing method, which is a low-cost process having a simple process and high material utilization efficiency. It is an object of the present invention to provide a highly accurate manufacturing method of a color filter which has no color mixture, has high color reproducibility, and has high surface flatness.

[0014]

That is, the present invention provides a method for producing a color filter having a plurality of fine pixel portions of different colors on the same transparent substrate, which comprises: 1) a transparent transparent material for visible light on the transparent substrate. And 2) curing the visible light transparent material in an area other than the pixel area of the colored layer to form a coloring prevention area, and 3) printing a plurality of areas in the pixel area by printing. The method for producing a color filter, comprising: a step of supplying colorants of different colors to a plurality of colors; and 4) a step of curing the entire colored layer that has been colored.

In the coloring by the printing in the third step of the present invention, a plurality of coloring materials of different colors are printed in each of the regions to be the pixels for each color, that is, each color is sequentially printed for coloring, or Any method of simultaneously printing and coloring a plurality of coloring materials of different colors in the area to be the pixel can be used. In either case, the drawing time can be shortened in the entire color filter as compared with other methods.

The color filter manufacturing method of the present invention is, specifically, a method of manufacturing a color filter having a plurality of fine pixel portions of different colors on the same transparent substrate. 1) Light-shielding on the transparent substrate A step of forming a film and forming a large number of openings at positions where the pixel portion of the light shielding film is provided, 2) a step of providing a colored layer made of a visible light transparent material on the light shielding film of the transparent substrate, 3) the A step of forming a coloring prevention region on the visible light transparent material in a region other than the pixel region of the coloring layer by light pattern exposure, or photo-curing by light pattern exposure and heating, 4) Prevention of color mixture that is the pixel region From a plurality of different colors, including a step of supplying a plurality of coloring materials of different colors to the area pixel portion by printing to color the plurality of colors, and 5) curing the entire colored layer by light or heat. Na And forming a pixel portion.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be specifically described with reference to the drawings. FIG. 1 is a process drawing showing an example of a method for manufacturing a color filter of the present invention. In the method for manufacturing a color filter according to the present invention, first, in FIG. 1A, a light curing film 2 is formed on a surface of a transparent substrate 3 having a light shielding film 2 having an opening 11 at a position where a pixel portion 12 is formed. The colored layer 1 made of a visible transparent material of the mold is applied by a method as described below.

Next, in FIG. 1 (b), a portion other than the above-mentioned opening, which is a region other than the pixel region of the colored layer, which is not desired to be colored (portion 5 in the drawing) is photo-cured in the colored layer. The pattern exposure 4 is performed with the light having the wavelength having the sensitivity. This can be easily performed by using a photomask corresponding to the light-shielding film and an image exposure device for photolithography. As a result, the coloring layer on the light-shielding film is photo-cured, and the coloring material to be printed in a later step is not absorbed in the exposed portion. In order to accelerate this curing, PEB (Post-exposure) is performed after exposure.
Re Bake) Heating may be performed. In the figure, 5 indicates a photo-cured portion and 6 indicates an uncured portion.

Next, in FIG. 1C, the red, blue, and green pixels are printed by aligning with the uncured portion 6 of the colored layer.
This printing may be performed for each color, and may be printed three times in total, or three color plates may be used to place the three color materials 8 on one blanket cylinder 7 and then once on the color layer. May be simultaneously transferred to.

As a result, the coloring material is absorbed only by the uncured coloring layer 9 in the pixel opening, and is not absorbed by the coloring layer on the light-cured light-shielding film. Moreover, when the coloring material is transferred to the photo-cured portion 5 on the light-shielding film and transferred, most of it is drawn into and absorbed by the uncured portion 6 of the adjacent opening portion. Almost no coloring material remains on the surface of, so that even if the positional deviation of the transfer of the coloring material occurs, different color mixture does not occur. Further, since the coloring material is absorbed and fixed in the uncured portion, the pixel shape distortion due to the deformation of the ink, which occurs in the conventional printing method, does not occur. For this reason, surface unevenness due to the overlapping of ink does not occur, and the surface can be finished more evenly.

Next, in FIG. 1D, after the uncured portion 6 of the colored layer is colored, the whole is cured by light or heat 10. After curing, a protective layer may be applied to the surface if necessary.

As described above, the pixel portion 12a of the first color and the pixel portion 12 of the second color are provided at the positions of the openings of the light shielding film 2.
It is possible to obtain a color filter having fine pixel portions of three colors of red (R), blue (B), and green (G), which has the pixel portion 12c of b and the third color.

In the method of manufacturing the color filter of the present invention, the most important point is to form the colored layer in which only the pixel portion of the colored layer absorbs the liquid coloring material. For that purpose, first, a colored layer made of a material transparent to visible light is applied on a transparent substrate. The coating method is spin coating,
Various methods described below can be used.

The coloring layer is made of a material that absorbs the coloring material. The portion other than the pixel portion is photo-cured by light pattern exposure to be crosslinked to prevent the coloring material from being absorbed in the portion other than the pixel portion. After exposure, it may be heated with an oven or a hot plate to accelerate curing. In order to realize the present invention, it is the most important point to utilize the property that the coloring material is not absorbed in the crosslinked and cured portion of the coloring layer. This exposure can be realized with high resolution by using a photolithography exposure device and a photomask.

Next, a coloring material is supplied to the pixel portion by a printing method so that the uncured portion of the coloring layer absorbs the coloring material. As the printing apparatus, a flat plate offset printing machine or an intaglio gravure printing machine which has been conventionally proposed for forming a color filter,
A screen printer, a letterpress printer, etc. can be used.

The present invention is different from the conventional printing method which is a method for producing a color filter. First of all, a coloring material such as ink does not form a filter layer by itself but is absorbed in the coloring layer. That is, the filter layer is not the coloring material itself but the coloring layer. This avoids the problem of degrading the pattern accuracy such as the deformation of the ink layer due to the pressure in the printing process and the formation of the unevenness due to the overlapping of the ink. Secondly, since only the pixel portion absorbs the coloring material and the other portions do not absorb the coloring material, the forming accuracy of the filter pixel is substantially determined by the above-mentioned exposure accuracy.

Therefore, the decrease in precision conventionally associated with ink supply by printing can be avoided thereby. For example,
When offset printing is performed on a colored layer using a rubber blanket cylinder that deforms slightly, the surface of the blanket cylinder deforms slightly due to pressure, and the coloring material (corresponding to ink)
Even if the supply position of the liquid crystal is slightly deviated from the pixel portion on the substrate, the liquid colorant is not absorbed in the portion deviated from the pixel but is drawn into the pixel portion and absorbed, and the misregistration of the supply position is automatically corrected. . There is a similar correction effect for the positional deviation which is a problem in screen printing. Accurate alignment between the printing plate and the pixel portion on the substrate is necessary, but the accuracy thereof may be about the same as the accuracy required by a normal printing method because of the colorant absorption region. A slight misalignment is automatically corrected in the same manner as a misalignment due to the deformation of the printing plate.

In offset printing, oil-based ink is usually placed on the lipophilic surface of a printing plate, and water is supplied to the hydrophilic surface to suppress ink adhesion. However, when a hydrophilic coloring layer is used in the present invention, conversely, a hydrophilic coloring material is placed on the hydrophilic surface of the printing plate and the adhesion of the coloring material is suppressed by utilizing the water repellency of the lipophilic surface. I can do things. In contrast to the case of using oil-based ink, the plate of the present invention has a negative / positive relationship. The creation of a printing plate suitable for each printing method can be devised according to each printing method.

Coloring of the pixel portion is performed one by one by printing using the red, green and blue plates on the colored layer having the colorant absorbing area only in the pixel portion. Since a higher accuracy can be obtained as compared with the color filter forming method by the usual printing method, a wider variety of printing methods than the conventional one can be applied. Further, it is also possible to use lithographic printing and to deposit the coloring materials of three colors on the blanket cylinder so as to correspond to the pixel patterns, and then transfer the coloring materials to the coloring layer at once.

As described above, according to the present invention, it is necessary to accurately expose and photo-cure other than the pixel portion, but unlike photolithography, steps such as development and etching are not necessary. For this reason, a developing solution and a cleaning solution are not required, and not only the direct material can be remarkably saved, but also defective products generated in this process are much smaller than those in photolithography.

As the transparent substrate used in the present invention, any transparent substrate conventionally used for color filters can be used. For example, soda lime glass, non-alkali glass, glass such as quartz glass, polycarbonate resin, acrylic resin and other plastic substrates, and thin crystals of sapphire can also be used. The thickness is not particularly limited in principle, but is practically about 0.1 to 3.0 mm. If necessary, a light-shielding film between pixels, that is, a so-called black matrix may be formed on the transparent substrate.

As the coating device for the colored layer, various types of devices other than the spin coater can be used. Various roll coaters, blade coaters, air knife coaters,
A rod bar coater or the like can be used. After coating, a solid colored layer is formed by heat drying using an oven or a hot plate or natural drying. The thickness of the colored layer is 0.1-5
It is about 0 μm, more preferably about 0.5 to 5 μm.

The material for the colored layer must have a property of absorbing the coloring material, and must be chemically stable and excellent in transparency. Further, it is necessary that the adhesiveness with the protective layer or the transparent electrode formed on the transparent substrate, the black matrix or the color filter is high. Further, heat resistance and other process resistance required in the display manufacturing process are required to complete the display.

As the colorant, those obtained by dissolving a hydrophilic dye such as an acid dye or a direct dye in a hydrophilic solvent are widely selected and used. For example, as an example of the solvent, a high-purity water mixed with a glycol derivative such as ethylene glycol or propylene glycol, a carbitol derivative, glycerin, or the like and having characteristics adjusted can be used. Also,
Various additives may be added to control the properties of the colorant. Ink jet inks can be used in a wide range. However, it is not always necessary to achieve the high purity required for ink jet. As the colorant, a pigment dispersed in a lipophilic solvent can also be used. A coloring material in which a pigment is dispersed can also be used.

As the material of the coloring layer used in the present invention,
Any material that can be cured by light irradiation, heating, or light irradiation and heating treatment can be used. For example, a hydrophilic acrylic resin, an epoxy resin, a silicone resin, or a cellulose derivative such as methyl cellulose or ethyl cellulose is used.

A photopolymerization initiator (crosslinking agent) may be used to crosslink and cure these resins by light or light and heat. As the photopolymerization initiator, dichromate, bisazide compound, radical initiator, cationic initiator,
An anionic initiator or the like can be used. Further, these photopolymerization initiators can be mixed or used in combination with other sensitizers. Note that heat treatment may be performed after light irradiation in order to further advance the crosslinking reaction. In order to select the wavelength of the light to be irradiated so that the colored film is as transparent as possible to visible light, ultraviolet rays may be used if necessary.
I-line having a main peak near 365 nm and deep UV light containing much shorter wavelength components near 254 nm can also be used.

Next, a liquid crystal element is manufactured using the color filter manufactured by the method of the present invention. In the liquid crystal element according to the present invention, a ferroelectric liquid crystal is arranged between a pair of substrates on which transparent electrodes are formed, and the plurality of colored layers described above are laminated between at least one transparent electrode and the substrate to form a plurality of different layers. It has a color filter having a pixel portion with a fine color.

If one specific example of the liquid crystal device of the present invention is given, it has a structure as shown in FIG. As shown in FIG. 2, two glass substrates 13a and 13b are provided, and one of these glass substrates 13b has a light-shielding film 14 having a pixel opening, and the light-shielding film 14 has a pixel opening on the glass substrate 13b. The formed color filter 15 is laminated. The protective layer 16 of the color filter, the wiring 17, and the ITO pixel electrode 19 electrically connected to the wiring 17 are further laminated thereon, and the alignment control film 18b is formed on the surface thereof. The wiring 24, the ITO electrode 20, and the orientation control film 18a are laminated in this order on the other glass substrate 13a.

The glass substrates on which the film has been thus formed are fixed to each other with an adhesive 21 with a spacer 25 interposed therebetween as shown in FIG. A liquid crystal, for example, a smectic liquid crystal, a nematic liquid crystal, preferably a ferroelectric chiral smectic liquid crystal is injected into the cell gap 22 held by the spacer 25 after the edges of the two glass substrates bonded together are sealed. Polarizing plates 23a and 23b are attached to the back and front of the liquid crystal element thus formed, and a drive circuit is connected to the wiring. A display device is obtained by incorporating the above elements into a frame incorporating a backlight.

[0040]

EXAMPLES The present invention will now be described in more detail with reference to specific examples, but the present invention is not limited to the following examples.

Example 1 A method for producing a color filter for a liquid crystal display in which red, blue and green three color pixels are regularly arranged will be described.

100 nm of Cr was sputtered on a non-alkali glass substrate from which dirt was sufficiently removed by washing.
To a thickness of. Next, Cr is removed in a predetermined pattern by photolithography to form an opening, thereby forming a Bragg matrix (BM).

Next, a color filter is formed by the same procedure as in FIG. First, a photocurable resin composition comprising 96% by weight of a bisphenol A type epoxy resin and 4% by weight of a cationic initiator was applied on the above glass substrate with BM to a thickness of about 2 μm by a spin coating method, and the temperature was kept at 90 ° C. for 25 hours. Pre-baking is performed for a minute to form a colored layer.

Next, although the pattern is almost the same as BM, BM
Of the colored layer on the BM opening through a photomask having an opening slightly narrower than the opening of
Post-bake at 0 ° C. for 10 minutes to cure the exposed areas on the BM so that the colorant is not absorbed. Red,
The blue and green pixels are arranged at intervals of about 20 μm.

An opening for coloring the red coloring material to red by flat plate offset printing using a printing plate having a pattern matched to the uncured portion of the colored layer and formed with only red pixels and a blanket cylinder whose surface is rubbery. Part of the colored layer is printed and absorbed. In exactly the same manner, printing of blue pixels is performed using a plate that matches the pixels that are colored blue, and printing of green pixels is performed using a plate that matches pixels that are colored green.

60 parts by weight of water was used as the main component of the solvent of the colorant, and 20 parts by weight of NMP and 2 parts of ethylene glycol were used.
5 parts by weight was added, and 5 kinds by weight of the following hydrophilic dyes were dissolved therein to use three kinds of inks.

Red: C.I. I. Acid Red 118 Green: C.I. I. Acid Green 28 Blue: C.I. I. Acid Blue 112

After the three colors have been colored, the glass substrate is heated at 250 ° C. for 30 minutes to completely cure the uncured pixel portion, and a red, blue, and green pixel color filter is arranged. Was formed. An acrylic resin was applied to this surface by spin coating to a thickness of about 1 μm to form a protective film.

When the color filter thus formed is observed with an optical microscope, no color mixing occurs, and red, blue, and green pixels are regularly arranged, and a sufficiently flat color with good color reproducibility is obtained. A filter is obtained.

For comparison, when the above-mentioned UV-curing was not performed and the coloring layer having no photo-cured region was made to absorb the above-mentioned three-color coloring materials by the same offset printing as above, the coloring material of each pixel was colored. Interdiffusion in the layers resulted in significant color mixing.

Further, in the present invention, the advantage of the printing method that the material cost is about 1/50 and the cost is lower than that of the color filter by the pigment dispersion method using the color resist coating by the spin coating method is clearly shown.

Example 2 A black photosensitive resin in which pigments of six colors of red, blue, green, cyan, violet, and yellow were dispersed on a non-alkali glass substrate from which stains were sufficiently removed by washing to about 1 μm.
To the thickness of B, and an opening is formed by the photolithography method.
Form M.

Next, 97% by weight of polyvinylpyrrolidone,
A water-soluble negative resist mixed with 3% by weight of a bisazide compound as a photoinitiator is applied to a thickness of about 3 μm by a Meyer bar coater and prebaked at 90 ° C. for 20 minutes to form a photocurable colored layer.

In the same manner as in Example 1, this was exposed to ultraviolet light through a photomask having an opening pattern slightly narrower than the opening of the BM and post-baked to remove the coloring material except the pixel opening. A colored layer was formed that did not absorb. Further, in the same manner as in Example 1, red, blue, and green coloring materials were supplied to the pixel openings by offset printing, and heat curing,
A protective layer was applied to obtain a color filter.

The color filter thus produced had no color mixture between adjacent pixels and showed good color reproducibility and surface flatness.

Example 3 In the same manner as in Example 1, a coloring layer having a pixel portion which absorbs a coloring material and a color mixing prevention region which does not absorb the coloring material on the BM is formed on non-alkali glass. A red coloring material is printed on the red pixel portion of the coloring layer by screen printing. Similarly, a blue coloring material is sequentially printed on the blue pixel portion and a green coloring material is printed on the green pixel portion. After printing all the colors, the whole is heat-cured, and a similar protective layer is further formed thereon to form a color filter.

The color filter thus produced had no color mixture between pixels and showed good color reproducibility and surface flatness.

Example 4 By the same method as in Example 1, a coloring layer having a pixel portion which absorbs a coloring material and a color mixing prevention region which does not absorb the coloring material on the BM is formed on non-alkali glass.

61 parts by weight of water was used as the main component of the solvent of the coloring material, and 20 parts by weight of NMP and 2 parts by weight of ethylene glycol were used.
5 parts by weight was added, and 4 kinds by weight of the following hydrophilic dyes were dissolved therein to use 3 kinds of inks.

Red: C.I. I. Direct Red 158 Green: C.I. I. Acid Green 25 Blue: C.I. I. Acid Blue 113

A gravure roll that completely matches the red pixel portion is prepared, and the red coloring material is printed on the red pixel portion of this colored layer by gravure printing. Similarly, a blue coloring material is sequentially printed on the blue pixel portion and a green coloring material is printed on the green pixel portion. After printing all the colors, the whole is heat-cured, and a similar protective layer is further formed thereon to form a color filter.
The color filter thus formed showed good color reproducibility and surface flatness without any color mixture between pixels.

Example 5 A color filter having a protective layer on its surface is formed on an alkali-free glass by screen printing in the same manner as in Example 3.

Wirings and transparent segment electrodes are formed on the color filter in accordance with each pixel by a sputtering method and a photolithography method, and an alignment film is applied on the wirings to give orientation by rubbing.

A transparent common electrode is formed on a similar alkali-free glass prepared separately to form an alignment film. The SiO ₂ particles having a diameter of about 2 μm are used as spacers to join the above two glasses with the glass surfaces facing outward, and a ferroelectric liquid crystal is injected into a gap of about 2 μm between them to completely seal the glass. A polarizing plate was attached to the surface of the above-mentioned two sheets of glass to form a liquid crystal display panel.

When the panel thus obtained was driven to display a color image, a good image was obtained.

[0066]

As described above, according to the present invention, it is possible to improve the low pattern forming accuracy, which is a drawback of the printing method, which has the advantages that the process is simple and the capital investment can be suppressed. It is possible to obtain a highly accurate color filter having no color mixture, high color reproducibility, and high surface flatness at low cost.

[Brief description of drawings]

FIG. 1 is a process drawing showing an example of a method for manufacturing a color filter of the present invention.

FIG. 2 is a schematic sectional view showing an example of a liquid crystal element according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Colored layer 2 Light-shielding film 3 Transparent substrate 4 Pattern exposure 5 Photocured part 6 Uncured part 7 Blanket cylinder 8 Coloring material 9 Uncured colored layer 10 Light or heat 11 Opening 12 Pixel part 13a, 13b Glass substrate 14 Light-shielding film 15 Color filter 16 Protective layer 17,24 Wiring 18a, 18b Alignment control film 19 Pixel electrode 20 ITO electrode 21 Adhesive material 22 Cell gap 23a, 23b Polarizing plate 25 Spacer

Claims (3)

[Claims] 1. A method of manufacturing a color filter having a plurality of fine pixel portions of different colors on the same transparent substrate, 1) a step of providing a colored layer made of a visible light transparent material on the transparent substrate, 2) A step of curing a visible light transparent material in an area other than the pixel area of the colored layer to form a color prevention area, and 3) supplying a plurality of different color coloring materials to the pixel area by printing. A method for producing a color filter, comprising: a step of coloring with a plurality of colors; and 4) a step of curing the entire colored layer that has been colored. 2. A coloring material having a plurality of different colors is sequentially printed and colored for each color in a region serving as the pixel.
A method for producing the described color filter. 3. The method of manufacturing a color filter according to claim 1, wherein a plurality of coloring materials of different colors are printed at the same time on the regions to be the pixels to color the regions.