JP2003161826A - Color filter and liquid crystal display element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a liquid crystal display element having no display defect by eliminating nonconformities in rubbing process which is liquid crystal molecular alignment processing, when the liquid crystal display element is manufactured in an overcoatless color filter having a resin black matrix. <P>SOLUTION: A high quality liquid crystal display element having no alignment abnormality is enabled with the overcoatless color filter by color filter constitution, making 20-55 degrees for the angle making the resin matrix and a transparent substrate and making 10-25 degrees for the angle making the resin black matrix and a colored layer. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a color filter and a black matrix used in a liquid crystal display panel or the like,
In particular, the present invention relates to a black matrix used in a color filter manufacturing method using an inkjet method, and a liquid crystal element equipped with the color filter.

[0002]

2. Description of the Related Art The development of personal computers in recent years,
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 necessary for further spread, and there is an increasing demand for cost reduction of a color filter, which has a particularly high cost weight.

As a main manufacturing method of the color filter,
There are a printing method, an electrodeposition method, a dyeing method, and a pigment dispersion method. However, a problem common to these methods is that the same step needs to be performed three times in order to form R, G, and B. The higher the cost and the more the steps, the lower the yield. In order to improve this problem, JP-A-59-75205, JP-A-63-235901, JP-A-1-217302, and JP-A-4-12
Japanese Patent Laid-Open No. 3005, Japanese Patent Laid-Open No. 7-146406, and the like disclose a method of manufacturing a color filter using an inkjet method.

These are different from the above-mentioned conventional method in that R,
Coloring liquid containing G and B dyes (hereinafter referred to as ink)
Is ejected from the nozzle onto the filter substrate, and the ink is dried on the filter substrate to form a colored portion. According to this method, the R, G, and B colored portions can be formed at one time, and since the amount of the coloring liquid used is not wasted, the productivity is greatly improved and the cost is reduced. Can be expected. The black matrix that has been used in conventional color filters has a large absorption coefficient for visible light and a high optical density due to the sputtering method using a metallic chromium film sandwiched between oxide layers such as a chromium oxide film. Alternatively, a thin film is formed by a vacuum film forming method such as an ion plating method.

However, in the ink jet method, since the black matrix is used as the ink holding frame,
Since a thickness of at least 1 μm or more is required to obtain the thickness of the colored portion that satisfies the color characteristics of the color filter, it is practically impossible to form the frame body by the metal black matrix by vacuum film formation. , A resin black matrix is used. In addition, this resin black matrix is required to have a thickness of at least 1 μm or more in order to obtain an optical density as a light-shielding property with the black pigment contained in the component.

As a general resin black matrix, a black pigment typified by carbon black or a mixed color black pigment obtained by mixing a pigment such as red, green, blue, yellow, and violet with a negative resist of an alkali-soluble type is used alone or What is constituted by being dispersed by mixing is used.

In the patterning process by such a negative resist type photolithography method, ultraviolet exposure is first performed through a photomask on which a desired pattern to be a black matrix is formed. The negative resist has a solubility in a developing solution lower than that of the unexposed part because the exposed part undergoes a crosslinking reaction with light energy to be photocured.
Then, the unexposed portion is selectively dissolved and removed using a dilute alkaline developing solution such as sodium carbonate, and then the developing solution is washed to form a desired pattern.

However, since the resin black matrix contains the black pigment, it is difficult for light energy to reach the lower portion of the resist material during exposure, and therefore the photocured portion due to exposure remains at the surface layer portion of the resist layer. Therefore, as shown in FIG. 1A, the transparent substrate side where the photo-curing is insufficient during development is side-etched. In the post-baking, which is a heat-curing process after development and rinsing, since it is exposed to heat of about 200 ° C. for several minutes to several tens of minutes, the overhang portion on the side etching upper part is dropped due to thermal sag. It is common to have such a taper shape.

When a high heat resistant material is used or the post-baking condition is gentle, the reverse taper state after development may be maintained. In both cases, the shoulder shape on the surface side is While it is exposed to the developing solution, it is slightly isotropically etched, so that it is not a perfect rectangle but a curved shape. Further, in the subsequent heat curing step, this tendency is at least increased. These tendencies become more remarkable as the film becomes thicker and the optical density becomes higher.

In the ink jet method, the ink used is generally 5c in consideration of ejection stability of the head.
Low-viscosity inks of ps or less are used. Therefore, the solid content in the ink is only about several wt% to several tens wt% of the coloring material regardless of the dye and the pigment, and the thickness of the ink after drying, that is, the thickness of the colored portion is from several minutes to several tens before drying. It will be about one-third. Therefore, in order to obtain the thickness of the colored portion that satisfies the color characteristics of the color filter, it is necessary to fill the ink with a volume that is several times to several tens times the volume of the colored portion. As this method, there is a method in which a black matrix serving as a frame is made ink repellent and a convex ink meniscus is held to fill a required amount of ink with a frame having a low height, for example, JP-A-7-359915. , Japanese Patent Application Laid-Open No. 7-84122. Then, the filled ink is dried and cured to form a colored portion.

FIG. 2 shows the cross-sectional shape of the black matrix,
The relationship of the film thickness of the colored portion in which the filled ink becomes flat by drying is shown. The ink drying mechanism is affected by the cross-sectional shape of the black matrix, and the closer it is to a rectangle, the flatter the colored portion becomes on the surface closer to the surface layer surface. However, the resin black matrix cannot be an ideal rectangle that does not have a curved surface. Therefore, in order to form a flat colored portion, the colored portion must be thinner than the black matrix, and there is a step between the black matrix and the colored portion. Occurs. Therefore, in the subsequent liquid crystal element manufacturing process, rubbing, which is an alignment treatment in the vicinity of the step between the black matrix and the colored portion, becomes incomplete, and non-alignment of liquid crystal molecules or a disclination line due to a reverse tilt domain is generated. There is a problem in that the liquid crystal display element causes an abnormal alignment and causes serious display defects such as light leakage and deterioration of contrast.

For that purpose, it is necessary to form an overcoat which is a flattening film on the colored portion forming surface, which hinders the cost reduction which is the greatest advantage of the ink jet method.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a structure in which a complete rubbing process can be performed in the vicinity of a stepped portion between a resin black matrix and a colored portion, and an alignment abnormality does not occur. That is. Accordingly, it is an object of the present invention to provide a high-quality color filter substrate having no alignment abnormality with a structure without an overcoat, and to provide a liquid crystal display element having excellent display characteristics at a low cost by using this color filter substrate. To do.

[0014]

A color filter of the present invention has a resin black matrix and a colored portion provided between the resin black matrices on a transparent substrate, and has a side surface of the resin black matrix. The angle with the transparent substrate is 20 to 55 °.

Further, the transparent substrate has a resin black matrix and colored portions provided between the resin black matrices, and an angle formed between the upper end surface portion of the resin black matrix and the colored portion is 10 to 25. It is characterized by being °. Further, the transparent substrate has a resin black matrix and a colored portion provided between the resin black matrices, and an angle formed between the side surface of the resin black matrix and the transparent substrate is 20 to 55 °.
And the angle formed by the upper end surface portion of the resin black matrix and the colored portion is 10 to 25 °. Furthermore, the manufacturing method of the color filter of the present invention,
Ink is applied between the resin black matrices by an inkjet method to form colored portions.

Further, the liquid crystal display element of the present invention is characterized in that a liquid crystal is sandwiched between the color filter and a pair of opposing substrates.

[0017]

A color filter according to claim 1 of the present invention comprises a black matrix provided on a transparent substrate and a plurality of colored portions provided at predetermined positions of the black matrix. At
The color filter is characterized in that an angle formed between a side surface of the black matrix and a surface of the transparent substrate is 20 to 55 °. Even in the vicinity of the stepped portion between the matrix and the colored layer, rubbing, which is an alignment treatment, can be favorably performed, and a regular arrangement of liquid crystal molecules can be realized in every corner of each pixel.

Next, a color filter according to a second aspect of the present invention is a color filter having a black matrix provided on a transparent substrate and a coloring portion provided at a predetermined position of the black matrix, The angle formed by the tangent of the black matrix and the top surface of the black matrix is 1
The color filter is characterized in that it is 0 ° to 25 °, and in a liquid crystal element manufacturing process that is a post-process, rubbing that is an alignment treatment is performed even in the vicinity of the step portion between the black matrix and the coloring layer. It can be performed well, and liquid crystal molecules can be regularly arranged in every corner of each pixel.

Next, in a color filter according to a third aspect of the present invention, in a color filter having a black matrix provided on a transparent substrate and a plurality of colored portions provided at predetermined positions of the black matrix. ,
The angle formed between the side surface of the black matrix and the surface of the transparent substrate is 20 to 55 °, and the angle formed between the tangent of the portion where the black matrix contacts the surface of the colored portion and the upper end surface of the black matrix. 10 to
It is characterized in that it is 25 °, and in the subsequent liquid crystal element manufacturing process, rubbing, which is an alignment treatment, can be favorably performed even in the vicinity of the step portion between the black matrix and the colored layer, and the liquid crystal is distributed to every corner of each pixel. Since the molecules can be arranged regularly, a high yield can be achieved by expanding the process margin of the liquid crystal device manufacturing process, and the selection range of materials used in the liquid crystal device manufacturing process represented by liquid crystal materials and alignment film materials is expanded. In addition, it can greatly contribute to the price reduction of color filters such as the cost reduction of materials.

Next, in the method for manufacturing a color filter according to claim 4 of the present invention, the colored portion is formed by ejecting ink for coloring from an ink jet head. It is characterized by the color filter according to any one of claims 3 and is suitable for manufacturing a color filter which is inexpensive and has no color mixture or color unevenness.

Next, a liquid crystal display element according to a fifth aspect of the present invention is a liquid crystal display element comprising the color filter according to any one of the first to third aspects. This is a feature of the present invention, and it is possible to realize a liquid crystal display device without display defects such as reduction in contrast and light leakage.

The black matrix material used in the present invention comprises a resin component, a black pigment and / or red, green, blue,
It is a photosensitive resin containing a mixed-color black pigment obtained by mixing pigments such as yellow and purple, and a solvent for dispersing and dissolving these components.

The resin material may be a negative type or a positive type as long as it is a photosensitive resin such as an acrylic resin used for a general black photosensitive resin.

As the black pigment component, carbon black, an organic pigment as a mixed color black pigment obtained by mixing pigments such as red, green, blue, yellow, and violet can be used.

In order to form the partition part on the transparent substrate using the photosensitive resin, for example, spin coating or the like is used to form 1 to 3 parts.
It can be formed by forming a thin film having a thickness of about μm on the entire surface, and then exposing, developing, cleaning and post-baking.

Here, by controlling the patterning conditions such as the exposure, development, cleaning, and post-baking,
The shape of the black matrix and the shape of the colored portion after that can be controlled.

The coloring material used in the present invention comprises a pigment, a dye and the like, a suitable resin and other additives, and a non-aqueous material containing an organic solvent for dispersing and dissolving them is preferable. It is not limited to.

As a method for forming the colored portion, an inkjet printing method using an inkjet printing machine is suitable, but any method can be used as long as it can form the constitution of the present invention.

As the transparent substrate used in the present invention, for example, glass is often used, but a plastic film or a plastic sheet may be used. Further, if necessary, in order to improve the adhesion between the transparent substrate and the partition portion and the colored ink, a thin film for improving the adhesion can be formed on the transparent substrate in advance.

Embodiments of the invention described in claims 1 to 5 of the present invention will be described below with reference to the drawings. The embodiment shown here is merely an example, and the present invention is not necessarily limited to this embodiment.

FIG. 3 shows a sectional structure of a color filter according to the present embodiment. The black matrix 2 shown in FIG. 3 was formed of a novolac resin-based negative resist having a thickness of 3.5 μm in which a black pigment or the like was dispersed by a spin coater. After that, exposure, development and rinsing were performed using a photolithography method to form a pattern. In the developing process, spray development was used which enables uniform development on the entire surface of the substrate. The parameters of the development process include the type of developer,
Concentration, temperature, spray pressure, substrate feed rate,
The taper shape in cross section and the shoulder shape on the surface layer surface side of the black matrix 2 were controlled under these conditions and the conditions of post-baking thereafter. Post-baking was performed using a horizontal laminar flow hot air circulation type drying furnace, and the film thickness was reduced by post-baking and finally became 2.5 μm. After that, a flat colored portion 3 was formed between the black matrixes 2 by ejecting colored inks of three primary colors of red, green, and blue using an inkjet printing machine, and drying and curing.

The angle θ1 formed by the transparent substrate 1 and the tangent line drawn from the center of the side face to the bottom face of the black matrix 2 shown in FIG. 3 is defined as the angle formed by the side face and the transparent substrate 1. Further, an angle θ2 formed by a tangent line drawn from the contact portion of the black matrix 2 on the surface layer of the colored portion 3 to the upper end surface of the black matrix 2 is defined as the angle formed by the upper end surface portion of the black matrix 2 and the colored portion 3.

As the angle θ1 increases, the step of the film thickness at which the black matrix 2 and the colored portion 3 become flat becomes smaller as the angle increases, but as described in the prior art, it may become an ideal rectangle in the resin black matrix. In the end, the film thickness at which the colored portion 3 is flattened is finally influenced by the shoulder shape on the surface layer side of the black matrix 2, and the surface layer surface of the black matrix 2 and the surface layer surface of the colored portion 3 are flush with each other. Don't When the angle θ1 was 55 ° or more, the increase in thickness at which the colored portion 3 became flat was saturated, resulting in a step difference of about 0.7 μm.

The angle θ1 is formed by the upper portion of the side wall portion melted by side etching during development being softened and dropped by the heat of post-baking, and the effect of thermal sag due to the heat resistance of the resin material is also taken into consideration. Occur. If the angle θ1 is made smaller due to such a forming process, it is necessary to increase the amount of side etching. This reduces the contact area of the black matrix 2 with the transparent substrate 1 side at the time of development and greatly overhangs the surface side of the black matrix 2, resulting in a general cleaning step after development. The high-pressure spray cleaning of pure water, which is called "pure water", easily causes the black matrix pattern to be missing and the overhang to be missing. Particularly, since the transparent substrate 1 used for manufacturing the color filter has a size of 300 mm × 400 mm or more, it is extremely difficult to form a pattern without defects on the entire surface.

Table 1 shows the relationship between the angle θ1 and the pattern defects represented by the missing and partial missing of the black matrix pattern. Here, the angle θ1 that can be stably formed with a high yield was 20 ° or more.

[0036]

[Table 1]

The alignment characteristics of a liquid crystal display device manufactured by using a color filter having a colored portion formed by an ink jet method on a black matrix with the angle θ1 as a parameter were confirmed. Alignment abnormalities were caused by the alignment and reverse tilt domains, and a liquid crystal display element suffered from display defects due to a reduction in contrast and light leakage from the display section. This is because the rubbing process, which is an aligning process of the liquid crystal display element, is hindered by the step angle of the boundary between the black matrix and the coloring layer, and the rubbing process sufficient to align the liquid crystal molecules cannot be performed.

FIG. 4 shows a conceptual diagram of the rubbing process. In the rubbing process, an alignment film (not shown) represented by a polyimide resin formed on a color filter is rubbed with a buff or the like in order to arrange the liquid crystal molecules regularly and tilt the liquid crystal molecules at a constant angle with respect to the substrate. The cloth 101 is wound around the roller 102 and rotated to rub the alignment film. The parameters include the type of the alignment film, the type of the rubbing cloth, the rotation number of the roller, the feeding speed of the substrate passing under the roller, the pressing pressure of the rubbing cloth represented by the nip width, and the like.

Further, the angle θ2 formed by the upper end surface portion of the black matrix 2 and the colored portion 3 is influenced by the shoulder shape on the surface layer surface of the black matrix, which is determined by the material characteristics of the black matrix and the thermal history in the manufacturing process. To be done. Therefore, reducing the angle θ2 means reducing the heat resistance of the material or providing a high temperature heat history.

Table 2 shows the relationship between the angle θ2 and the color filter characteristics. When the angle θ2 is smaller than 10 °, the flat portion of the surface of the black matrix surface is reduced, and it becomes difficult to stably hold the ink when ejecting the ink by the inkjet method to form the colored portion. Was generated, resulting in color mixture between pixels, resulting in a display defect.

[0041]

[Table 2]

Further, when the angle θ2 is larger than 25 °, sufficient processing cannot be performed similarly in the rubbing step described above, and the alignment abnormality of the liquid crystal molecules occurs.

Further, in the color filter having the angle θ1 of 20 to 55 ° and the angle θ2 of 10 to 25 °, as shown in Table 3, the margin of each parameter of the rubbing condition is widened, and the liquid crystal display element is stable with a high yield. Was produced.

[0044]

[Table 3]

[0045]

Embodiments of the present invention will be described in detail below with reference to FIG. (Example 1) "CFPR Bk-610S" manufactured by Tokyo Ohka Kogyo Co., Ltd. was used as a black resist, and a 320 mm x 400 mm x 0.7 mm Corning 1737 glass substrate was used as the transparent substrate 1.

First, the glass substrate was washed with water, dried, and then the black resist was applied onto the glass substrate 1 by a spin coater manufactured by Tokyo Ohka Kogyo Co., Ltd. The spin conditions at this time were 600 rpm and 15 seconds.
After spin coating, dry prebaking was performed on a hot plate at 90 ° C. for 180 seconds, and the resulting black resist layer had a film thickness of 3.5 μm. After that, exposure was performed with an exposure machine manufactured by Hitachi Electronics Engineering Co., Ltd. through a negative mask under the exposure conditions of an integrated exposure amount of 90 mJ / cm 2 and a proxy gap of 100 μm.

The exposed substrate obtained under the above conditions was developed. As the developing solution, “CFPR developing solution N-A3K” manufactured by Tokyo Ohka Kogyo Co., Ltd. was diluted 20 times and used. As the developing device, a spray cleaning device was used for 60 seconds, and immediately thereafter, pure water high pressure spray cleaning was performed to rinse the developing solution.

Next, post-baking was performed using a dry baking oven manufactured by Tabai Suppeck. The post-baking condition was 210 ° C. for 20 minutes to form the black matrix 2.

Next, using an ink jet printer,
After the red, green, and blue colored inks were ejected between the black matrices 2, the solvent of the ink was evaporated in a drying oven manufactured by Tabay Suppeck Co., so that the colored portion 3 became flat.

Next, the ink in the colored portion 3 was photopolymerized by an ultraviolet curing device using a metal halide lamp manufactured by Eyegraphic Co., Ltd., and finally, thermal baking was performed at 230 ° C. for 3 minutes on a hot plate manufactured by Chuo System Engineering Co., Ltd. .

When a cross-sectional shape of a part of this color filter substrate was observed with a scanning electron microscope S-4300 manufactured by Hitachi, Ltd., the angle formed between the glass substrate 1 and the side surface of the black matrix 2 was 40 °. Black matrix 2
The angle formed by the upper end surface portion of and the colored portion 3 was 30 °.

An ITO film 4 having a thickness of 0.14 μm is formed on the entire surface of the color filter substrate 12 by a sputtering method, and a polyimide alignment film 5 of 0.10 μm is formed.
A film having a thickness of m was formed on the entire surface by an offset printing method, and rubbed to form a first substrate. Next, using the active matrix substrate 11 in which TFTs are formed for each pixel,
A polyimide alignment film 5 having a thickness of 0.10 μm was formed on the entire surface by an offset printing method, and rubbed to form a second substrate. The first substrate and the second substrate were arranged so that the electrode surfaces face each other, and the periphery of the substrate was sealed 6 to form an empty cell. A nematic liquid crystal 7 was injected into the empty cell, and an injection port (not shown) was sealed to produce a liquid crystal cell. Polarizing plates 8 were arranged on both sides of the liquid crystal cell to prepare an active matrix type liquid crystal display element.

When a voltage was applied to the nematic liquid crystal 7 using this liquid crystal display element and the alignment state of the liquid crystal was observed, the liquid crystal was regularly arranged in every corner of the pixel, and it was beautiful without display defects such as reduction in contrast. Color display was possible. (Embodiment 2) A color filter substrate was produced in the same manner as in Embodiment 1 except for the black resist material and developing conditions.

As the black resist, "CFPR Bk-620S" manufactured by Tokyo Ohka Kogyo Co., Ltd. was used. This material is
The composition of CFPR Bk-610S was changed to slightly lower the heat resistance, and it was effective for controlling the angle formed by the upper end surface portion of the black matrix and the colored portion.

Further, the development time was set to 55 seconds in order to control the side etching at the time of development using the above materials.

When a cross-sectional shape of a part of this color filter substrate was observed with a scanning electron microscope S-4300 manufactured by Hitachi, Ltd., the side angle between the glass substrate and the black matrix was 60 °, and the black matrix The angle formed by the upper end surface portion and the colored portion was 18 °.

A liquid crystal display device was manufactured using this color filter substrate.

When a voltage was applied to the nematic liquid crystal using this liquid crystal display device and the alignment state of the liquid crystal was observed, the liquid crystal was regularly arranged in every corner of the pixel, and a beautiful color was obtained without display defects such as reduction in contrast. It was possible to display. (Embodiment 3) A color filter substrate was manufactured in exactly the same manner as in Embodiment 1 except for the developing conditions and the post-baking conditions.

In order to control the side etching at the time of development using the above material, a development time of 65 seconds is set,
Further, in order to control the angle formed by the upper end surface portion of the black matrix and the colored portion, post bake is performed at 23
It was performed at 0 ° C. for 25 minutes.

When a section of this color filter substrate was observed with a scanning electron microscope S-4300 manufactured by Hitachi, Ltd., the angle between the glass substrate and the side surface of the black matrix was 35 °, and the black matrix was The angle formed by the upper end surface portion and the colored portion was 22 °.

A liquid crystal display device was manufactured using this color filter substrate.

When a voltage was applied to the nematic liquid crystal using this liquid crystal display element and the alignment state of the liquid crystal was observed, the liquid crystal was regularly arranged in every corner of the pixel, and a beautiful color was obtained without display defects such as reduction in contrast. It was possible to display.

[0063]

As described above, according to the present invention, it is possible to provide a structure in which a complete rubbing treatment can be performed in the vicinity of the stepped portion between the resin black matrix and the colored portion, and no alignment abnormality occurs.

As a result, a high-quality color filter substrate having no alignment abnormality and having no overcoat is realized.
Further, by using this color filter substrate, it is possible to provide a liquid crystal display element which is inexpensive and has excellent display characteristics.

[Brief description of drawings]

FIG. 1A is a general sectional view of a resin black matrix during development, and FIG. 1B is a general sectional view of a resin black matrix during post-baking.

FIG. 2 is a relationship diagram between a cross-sectional shape of a resin black matrix and a film thickness of a colored portion

FIG. 3 is a sectional shape view of a color filter according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of a rubbing process in a liquid crystal display device.

FIG. 5 is a sectional shape view showing an example of a liquid crystal display element of the present invention.

[Explanation of symbols]

1 transparent substrate 2 Black matrix 3 Coloring part 4 ITO film 5 Alignment film 6 seal 7 nematic liquid crystal 8 Polarizer 11 Active matrix substrate 12 Color filter substrate 101 rubbing roller 102 rubbing cloth

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2C056 EA24 FB01                 2H048 BA02 BA45 BA55 BA64 BB01                       BB02 BB06 BB24 BB42                 2H091 FA02Y FA35Y FB02 FB11                       LA30

Claims (5)

[Claims] 1. A color filter having a black matrix provided on a transparent substrate and a plurality of colored portions provided at predetermined positions of the black matrix, wherein a side surface of the black matrix and a surface of the transparent substrate are provided. A color filter characterized in that an angle formed is 20 to 55 °. 2. In a color filter having a black matrix provided on a transparent substrate and a colored portion provided at a predetermined position of the black matrix, a tangent line of a portion where the black matrix is in contact with the surface of the colored portion. An angle formed by the upper end surface of the black matrix is 10 to 25 °. 3. A color filter having a black matrix provided on a transparent substrate and a plurality of colored portions provided at predetermined positions on the black matrix, wherein a side surface of the black matrix and a surface of the transparent substrate are provided. The angle formed is 20 to 55 °, and the angle formed by the tangent of the portion where the black matrix contacts the surface of the colored portion and the upper end surface of the black matrix is 1
A color filter, which is 0 to 25 °. 4. The color filter according to claim 1, wherein the colored portion is formed by ejecting an ink for coloring from an inkjet head. 5. A liquid crystal display device comprising the color filter according to any one of claims 1 to 3.