JP2001324717A - Color filter for liquid crystal display device, method of manufacturing the same, and color liquid crystal display device - Google Patents

Abstract

An object of the present invention is to provide a color filter for a liquid crystal display device and a color liquid crystal display device having excellent display quality, which can omit an alignment process and a spacer dispersing step in a liquid crystal display device assembling process. A light shielding layer is formed on a transparent substrate by a known method.
2. A pixel-shaped color filter layer 13 made of red, green, and blue and a transparent conductive film 14 are formed, and a photosensitive resin is used on the transparent conductive film 14 to form spacer pillars and liquid crystal alignment function projection layers. The conductive resin layer 15 is formed. The photosensitive resin layer 15 is exposed using an exposure mask 70 having a spacer column pattern 71, and further, an exposure mask 8 having a spacer column pattern 71 and an alignment projection pattern 72.
Exposure is performed again using 0. Develop with a predetermined developer,
The spacer pillar 16 and the liquid crystal alignment function projection layer 17 are formed to obtain the color filter 10 for a liquid crystal display of the present invention.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter used in a liquid crystal display device and a color liquid crystal display device. Color liquid crystal display device used

[0002]

2. Description of the Related Art A conventional color filter 7 for a liquid crystal display device.
Numeral 0 denotes rubbing or the like on the surface of the transparent conductive film 74 of the color filter substrate on which the light-shielding layer 72, the pixel-like color filter layer 73, and the transparent conductive film 74 are formed, as shown in FIG. Are formed to form spacer pillars 75.

[0003] Further, as shown in FIG.
An array substrate 8 on which a liquid crystal drive element array 82 is formed
The alignment film 33 and the alignment film 34 are formed on both the color filter 70 for the liquid crystal display device, and the alignment process is performed. The display device 300 is manufactured.

A rubbing method is widely used for the alignment treatment. In the rubbing method, the orientation is controlled by conditions such as the number of rubbings, the amount of roll pressing, and the material of the roll, so that it is difficult to measure control parameters and to accurately manage the rubbing state. As described above, since the alignment treatment such as rubbing is performed by a physical method, the alignment film is damaged by rubbing such as a scratch, or unevenness is generated, and dust is generated by a rubbing roll or the like. Have a problem.

[0005]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above-mentioned problems, and an alignment process after forming an alignment film by forming a liquid crystal alignment functional layer on the surface of a pixel-like color filter layer. It is an object of the present invention to provide a color filter for a liquid crystal display device which does not require a color filter and a color liquid crystal display device having excellent display quality.

[0006]

In order to achieve the above object, the present invention first provides a color filter having at least a light shielding layer, a pixel-like color filter layer and a transparent conductive film on a transparent substrate. 3. The color filter for a liquid crystal display device according to claim 1, wherein a liquid crystal alignment functional layer is formed of the same material as the pixel color filter layer on the surface of the pixel color filter layer.

According to a second aspect of the present invention, there is provided the color filter for a liquid crystal display device according to the first aspect, wherein the liquid crystal alignment functional layer has a grating shape or a triangular shape.

According to a third aspect of the present invention, the pixel-like color filter layer and the liquid crystal alignment function layer are formed by a mask exposure method. This is a method for manufacturing a filter.

A fourth aspect of the present invention is a color liquid crystal display device manufactured using the color filter for a liquid crystal display device according to the first or second aspect.

[0010]

Embodiments of the present invention will be described below. 1A and 1B are a partial plan view and a partial cross-sectional view showing an embodiment of a color filter for a liquid crystal display device of the present invention in which a liquid crystal alignment functional layer is formed on the surface of a pixel-like color filter layer. FIGS. 2A and 2B are partial plan views showing another embodiment of the color filter for a liquid crystal display device of the present invention in which a liquid crystal alignment functional layer is formed on the surface of a pixel-like color filter layer. FIG. 3 is a partial cross-sectional view showing an embodiment of a color liquid crystal display device manufactured using the color filter for a liquid crystal display device of the present invention, and FIG. Sectional sectional views showing another embodiment of a color liquid crystal display device manufactured using a color filter are shown.

A color filter 1 for a liquid crystal display according to the present invention.
Reference numeral 0 denotes a light-shielding layer 12, a pixel-like color filter layer 13R, 13G, 13B made of red, green, and blue, and a grating-like liquid crystal alignment on a transparent substrate 11, as shown in FIGS. 1 (a) and 1 (b). A functional layer 13a is formed, and a transparent conductive film 14 and spacer pillars 15 are further formed.

The color filter 2 for a liquid crystal display of the present invention
Reference numeral 0 denotes a light-shielding layer 22, a pixel-like color filter layer 23R, 23G, 23B made of red, green, and blue, and a triangular liquid crystal on a transparent substrate 21 as shown in FIGS. 2 (a) and 2 (b). An alignment function layer 23a is formed, and a transparent conductive film 24 and spacer pillars 25 are further formed.

Hereinafter, a method of manufacturing the color filter 10 for a liquid crystal display device of the present invention will be described. FIGS. 5A to 5F are cross-sectional views illustrating a part of the manufacturing process of the color filter 10 for a liquid crystal display device. First, a light shielding layer 12 and a red colored photosensitive resin layer 13 are formed on a transparent substrate 11 by a known method.
Is formed (see FIG. 5A). Here, the light-shielding layer 12 is also called a black matrix, and is formed by patterning a resin-based photosensitive resin layer having a predetermined concentration. The colored photosensitive resin layer 13 is obtained by applying a predetermined thickness of a photosensitive resin in which an organic pigment is dispersed in an epoxy-based, acrylic-based, polyimide-based, urethane-based, polyester-based, or polyvinyl-based resin. As the organic pigment, phthalocyanine-based, aziraki-based, condensed azo-based, quinacridone-anthraquinone-based, perylene-based, perinone-based, and the like are used. Also,
A dyeing filter which dyes a photosensitive resin layer made of a dyeable animal protein resin such as gelatin is also used.

Next, an exposure mask 5 having a linear pattern 51 and light shielding patterns 53 and 54 shown in FIG.
The red colored photosensitive resin layer 13 is exposed at a predetermined exposure amount using 0R-a. (See FIG. 5B).

Next, the transparent pattern 5 shown in FIG.
2. Exposure mask 50 having light-shielding patterns 53 and 54
Using Rb, the red colored photosensitive resin layer 13 is back-exposed at a predetermined exposure amount from the transparent substrate 11 side (see FIG. 5C). By this series of exposure processing, a red colored photosensitive resin layer 1 is formed.
A latent image of a grating-like liquid crystal alignment function layer and a red pixel-like color filter layer is formed on the surface of 3.

Next, the red colored photosensitive resin layer 13 is patterned with a predetermined developing solution to form a red pixel-like color filter layer 13R and a grating-like liquid crystal alignment functional layer 13a on its surface (FIG. 5 ( d)).

Next, a green colored photosensitive resin layer 13 is formed, and the exposure masks 50G-a and 50G-b shown in FIG.
In the same process as above, a patterning process such as a series of exposure and development processes is performed to form a green pixel-like color filter layer 13G and a grating-like liquid crystal alignment functional layer 13a on the surface thereof. Is formed, and the exposure mask 50B-a shown in FIG.
And a patterning process such as a series of exposure and development processes in the same process as above using 50B-b
A blue pixel-like color filter layer 13B and a grating-like liquid crystal alignment functional layer 13a are formed on the surface thereof.
(E)).

Next, the pixel-like color filter layers 13R, 1R
A transparent conductive film 14 is formed by sputtering an indium oxide-based target on the 3G and 13B liquid crystal alignment function layers 13a and the light shielding layer 12. Further, a photosensitive resin layer is formed, and is exposed and developed using an exposure mask having a predetermined pattern to form spacer pillars 15, thereby obtaining a color filter 10 for a liquid crystal display device of the present invention (FIG. 5
(F)). Here, as the photosensitive resin layer, a polyimide resin, an epoxy resin, an acrylic resin, a urethane resin, a polyester resin, a polyolefin resin, and a photosensitive resin having a phenol novolak resin as a main component have a predetermined thickness. It has been applied.

Hereinafter, a method of manufacturing the color filter 20 for a liquid crystal display device of the present invention will be described. FIGS. 6A to 6F are cross-sectional views of a partial configuration showing an example of a manufacturing process of the color filter 20 for a liquid crystal display device. First, a light shielding layer 22 and a red colored photosensitive resin layer 23 are formed on a transparent substrate 21 by a known method.
Is formed (see FIG. 6A). Here, the light shielding layer 22 is also called a black matrix, and is formed by patterning a resin-based photosensitive resin layer having a predetermined concentration. The colored photosensitive resin layer 23 is obtained by applying a predetermined thickness of a photosensitive resin in which an organic pigment is dispersed in an epoxy-based, acrylic-based, polyimide-based, urethane-based, polyester-based, or polyvinyl-based resin. As the organic pigment, phthalocyanine-based, azilake-based, condensed azo-based, quinacridone-anthraquinone-based, perylene-, perinone-based, and the like can be used. Also,
A dye filter obtained by dyeing a photosensitive resin layer made of a dyeable animal protein resin such as gelatin can also be used.

Next, the red colored photosensitive resin layer 13 is exposed to a predetermined light by using an exposure mask 60R-a having a pattern 61 having a density gradient and light-shielding patterns 63 and 64 as shown in FIG. Expose in quantity. (See FIG. 6B). Here, the pattern 61 having the density gradient is shown in FIG.
As shown in (b), the density at the central portion of the pattern is low, and the density increases toward the peripheral portion of the pattern.
Is almost the same as the concentration of Therefore, an inclined pattern corresponding to the density gradient is formed.

Next, by using an exposure mask 60R-b having a transparent pattern 62 and light-shielding patterns 63 and 64 as shown in FIG. Back exposure is performed with the exposure amount. (FIG. 6
(C)).

Next, the red colored photosensitive resin layer 23 is patterned with a predetermined developing solution to form a red pixel-shaped color filter layer 23R and a triangular liquid crystal alignment functional layer 23a on its surface (FIG. 6). (D)).

Next, a green colored photosensitive resin layer 23 is formed, and an exposure mask 60G shown in FIGS.
-A and a patterning process such as a series of exposure and development processes is performed using the exposure mask 60G-b in the same process as described above, so that a green pixel-like color filter layer 23G and a triangular liquid crystal are formed on the surface thereof. The alignment functional layer 23a and the blue colored photosensitive resin layer 13 are further formed to
Using the exposure mask 60B-a and the exposure mask 60B-b shown in (a) and (c), a patterning process such as a series of exposure process and development process is performed in the same process as described above to obtain a blue pixel-like color. A triangular liquid crystal alignment functional layer 23a is formed on the filter layer 23B and the surface thereof.
(E)).

Next, the pixel-like color filter layers 23R, 2R
A transparent conductive film 14 is formed by sputtering an indium oxide-based target on the 3G and 23B liquid crystal alignment functional layers 23a and the light shielding layer 22. Further, a photosensitive resin layer is formed, and is exposed and developed using an exposure mask having a predetermined pattern to form spacer columns 25, thereby obtaining the color filter 20 for a liquid crystal display device of the present invention (FIG. 6
(E)). Here, as the photosensitive resin layer, a polyimide resin, an epoxy resin, an acrylic resin, a urethane resin, a polyester resin, a polyolefin resin, and a photosensitive resin having a phenol novolak resin as a main component have a predetermined thickness. It has been applied. Further, the spacer pillar 26 is formed on the transparent conductive film 14 on the light-shielding layer 22, and is generally in the shape of a column or polygon having a width of about 10 μm and a height of about 5 μm.

[0025]

The present invention will be described in detail with reference to the following examples. Example 1 First, a black photosensitive resin in which carbon black was dispersed in an acrylic resin was applied to a transparent substrate 11 made of non-alkali glass having a thickness of 0.7 mm using a spinner to form a black photosensitive resin layer. Then, a patterning process such as exposure and development, and a heating process are performed to make the width 14 μm and the height 1.
A 3 μm light-shielding layer 12 was formed.

Next, a colored photosensitive resin in which a dianthraquinone pigment is dispersed in an acrylic resin is applied using a spinner to form a red photosensitive resin layer.
-A and a patterning process such as a development process and a heating process using the exposure mask 50R-b, and a red pixel-like color filter layer 13R having a width of 100 μm and a thickness of 1.3 μm and a thickness of 1.0 μm. , Width 6 μm and pitch 2
A 6 μm grating-like liquid crystal alignment functional layer 13a was formed.

Similarly, a colored photosensitive resin in which a phthalocyanine green pigment is dispersed in an acrylic resin is applied using a spinner to form a green photosensitive resin layer, and the exposure masks 50G-a and 50G-b are formed. A series of patterning treatments such as exposure processing and development, and heat treatment are performed to obtain a green pixel color filter layer 13G having a width of 100 μm and a thickness of 1.3 μm, and a grating having a thickness of 1.0 μm, a width of 6 μm and a pitch of 26 μm Liquid crystal alignment function layer 1
3a was formed.

Similarly, a photosensitive resin in which a phthalocyanine blue pigment is dispersed in an acrylic resin is applied using a spinner to form a blue photosensitive resin layer.
Using Ga and the exposure mask 50G-b, a series of exposure processing and patterning processing such as development, and heating processing are performed.
A blue pixel-like color filter layer 13B having a width of 100 μm and a thickness of 1.3 μm and a grating-like liquid crystal alignment functional layer 13a having a thickness of 1.0 μm, a width of 6 μm and a pitch of 26 μm were formed.

Next, an indium oxide-based target is sputtered to a thickness of 0.5 μm on the liquid crystal alignment functional layers 13 a of the pixel color filter layers 13 R, 13 G, and 13 B made of red, green, and blue and the light shielding layer 12. A transparent conductive film 14 was formed.

Next, a photosensitive resin containing an acrylic resin as a main component is applied on the transparent conductive film 14 to form a photosensitive resin layer, and a spacer pillar pattern is formed at a predetermined position using an exposure mask. Then, a predetermined amount of exposure was performed on the photosensitive resin layer, and development and heating were performed to form spacer pillars 15 having a height of 5.5 μm. Thus, a color filter 10 for a liquid crystal display device of the present invention was obtained.

Example 2 First, a black photosensitive resin in which carbon black was dispersed in an acrylic resin was applied to a transparent substrate 21 made of non-alkali glass having a thickness of 0.7 mm.
A black photosensitive resin layer is formed, and a patterning process such as exposure and development, and a heating process are performed. The width is 14 μm and the height is 1.3 μm.
Was formed.

Next, a photosensitive resin in which a dianthraquinone pigment is dispersed in an acrylic resin is applied to form a red photosensitive resin layer, and the exposure mask 60R-a and the exposure mask 60R are formed.
Using Rb, a series of patterning processes such as exposure and development, and a heating process were performed to obtain a width of 80 μm and a thickness of 1.3 μm.
m red pixel-shaped color filter layer 23R and a triangular liquid crystal alignment functional layer 23a having a height of 1.0 μm at the center and a width of 80 μm were formed.

Similarly, a colored photosensitive resin in which a phthalocyanine green pigment is dispersed in an acrylic resin is applied to form a green photosensitive resin layer, and a series of steps is performed using an exposure mask 60G-a and an exposure mask 60G-b. By performing patterning processing such as exposure processing and development, and heating processing, a width of 80 μm,
A green pixel-like color filter layer 23G having a thickness of 1.3 μm and a triangular liquid crystal alignment functional layer 23a having a height of 1.0 μm at the center and a width of 80 μm were formed.

Similarly, a colored photosensitive resin in which a phthalocyanine blue pigment is dispersed is applied to an acrylic resin to form a blue photosensitive resin layer, and a series of steps is performed using the exposure masks 60B-a and 60B-b. By performing patterning processing such as exposure processing and development, and heating processing, a width of 80 μm,
A blue pixel-like color filter layer 23B having a thickness of 1.3 μm and a triangular liquid crystal alignment functional layer 23a having a height of 1.0 μm and a width of 80 μm at the center were formed.

Next, an indium oxide-based target is sputtered to a thickness of 0.5 μm on the liquid crystal alignment function layer 23 a of the pixel color filter layers 23 R, 23 G, and 23 B made of red, green, and blue and the light shielding layer 22. A transparent conductive film 24 was formed.

Next, a photosensitive resin containing an acrylic resin as a main component is applied on the transparent conductive film 24 to form a photosensitive resin layer, and an exposure mask having spacer column patterns formed at predetermined positions is used. The photosensitive resin layer was exposed to light of a predetermined amount, developed and heated to form spacer pillars 25 having a height of 5.5 μm, thereby obtaining a color filter 20 for a liquid crystal display of the present invention.

<Embodiment 3> An alignment film 33 is formed on both a color filter 10 for a liquid crystal display device of the present invention and an array substrate 30 having a liquid crystal driving element array 32 formed on a transparent substrate 31.
Then, an alignment film 34 was formed, and the peripheral portion was sealed and bonded. Thus, a liquid crystal cell was produced, and the liquid crystal 41 was sealed in the liquid crystal cell to obtain a color liquid crystal display device 100 of the present invention.

<Embodiment 4> An alignment film 33 is formed on both a color filter 20 for a liquid crystal display device of the present invention and an array substrate 30 having a liquid crystal driving element array 32 formed on a transparent substrate 31.
Then, an alignment film 34 was formed, and the periphery was sealed and bonded together to form a liquid crystal cell. The liquid crystal 41 was sealed in the liquid crystal cell to obtain a color liquid crystal display device 200 of the present invention.

[0039]

According to the color filter for a liquid crystal display device of the present invention, the pixel color filter layer and the liquid crystal alignment functional layer can be formed simultaneously by controlling the pattern of the exposure mask and the exposure amount of the colored photosensitive resin layer. A liquid crystal alignment functional layer having excellent reproducibility can be obtained. By manufacturing a color liquid crystal display device using the color filter for a liquid crystal display device of the present invention, the steps of rubbing and spacer spraying can be omitted, and a color liquid crystal display device excellent in display quality can be obtained.

[Brief description of the drawings]

FIG. 1A is a partial schematic plan view showing one embodiment of a color filter for a liquid crystal display device of the present invention. (B)
FIG. 1 is a partial schematic cross-sectional view taken along line AA of a partial schematic plan view illustrating an embodiment of a color filter for a liquid crystal display device of the present invention.

FIG. 2 (a) is a partial schematic plan view showing another embodiment of the color filter for a liquid crystal display device of the present invention. (B)
FIG. 4 is a partial schematic cross-sectional view taken along line AA of a partial schematic plan view showing another embodiment of the color filter for a liquid crystal display device of the present invention.

FIG. 3 is a partial schematic cross-sectional view showing one embodiment of the color liquid crystal display device of the present invention.

FIG. 4 is a partial schematic sectional view showing another embodiment of the color liquid crystal display device of the present invention.

FIGS. 5A to 5F are partial schematic cross-sectional views showing one embodiment of a process for manufacturing a color filter for a liquid crystal display device of the present invention.

FIGS. 6A to 6F are partial schematic cross-sectional views showing another embodiment of the manufacturing process of the color filter for a liquid crystal display device of the present invention.

FIGS. 7A and 7B are partial plan views showing an example of an exposure mask used in an exposure step for forming a pixel-like color filter layer and a liquid crystal alignment function layer of a color filter for a liquid crystal display device of the present invention. FIG.

FIGS. 8A and 8B are partial plan views showing an example of an exposure mask used in an exposure step for forming a pixel-like color filter layer and a liquid crystal alignment functional layer of a color filter for a liquid crystal display device of the present invention. FIG.

FIGS. 9A and 9B are partial plan views showing an example of an exposure mask used in an exposure step for forming a pixel-like color filter layer and a liquid crystal alignment functional layer of a color filter for a liquid crystal display device of the present invention. FIG.

FIGS. 10A and 10C are partial plan views showing an example of an exposure mask used in an exposure step for forming a pixel-like color filter layer and a liquid crystal alignment functional layer of a color filter for a liquid crystal display device of the present invention. FIG. (B) is an explanatory view showing an example of the pattern density of the exposure mask 60R-a.

FIGS. 11A and 11C are partial plan views showing an example of an exposure mask used in an exposure step for forming a pixel-like color filter layer and a liquid crystal alignment functional layer of a color filter for a liquid crystal display device of the present invention. FIG. (B) is an explanatory view showing an example of the pattern density of the exposure mask 60G-a.

FIGS. 12A and 12C are partial plan views each showing an example of an exposure mask used in an exposure step for forming a pixel-like color filter layer and a liquid crystal alignment functional layer of a color filter for a liquid crystal display device of the present invention. FIG. (B) is an explanatory view showing an example of the pattern density of the exposure mask 60B-a.

FIG. 13 is a partial schematic plan view showing one embodiment of a conventional color filter for a liquid crystal display device.

FIG. 14 is a partial schematic cross-sectional view showing one embodiment of a conventional color liquid crystal display device.

[Explanation of symbols]

10, 20, 70: Color filter for liquid crystal display device 11, 21, 71, 81: Transparent substrate 12, 22, 72: Light shielding layer 13, 23: Colored photosensitive resin layer 13a, 23a: Liquid crystal alignment Functional layer 13R, 13G, 13B, 23R, 23G, 23B, 7
3. Pixel color filter layer 14, 24, 74, 82 Transparent conductive film 15, 25, 75 Spacer pillar 30, 80 Array substrate 33, 34 Alignment film 41, 91 Liquid crystal 50R -A, 50R-b, 50G-a, 50G-b, 5
0B-a, 50B-b, 60R-a, 60R-b, 60
Ga, 60G-b, 60B-a, 60B-b Exposure mask 51 Linear pattern 52, 62 Transparent pattern 53, 54, 63, 64 Light-shielding pattern 100, 200, 300 … Color liquid crystal display

Claims (4)

[Claims] 1. A color filter having at least a light-shielding layer, a pixel-like color filter layer and a transparent conductive film on a transparent substrate, wherein a liquid crystal alignment function is formed on the surface of the pixel-like color filter layer using the same material as the pixel-like color filter layer. A color filter for a liquid crystal display device, comprising a layer. 2. A color filter for a liquid crystal display device according to claim 1, wherein said liquid crystal alignment function layer has a grating shape or a triangular shape. 3. The method according to claim 1, wherein the pixel-like color filter layer and the liquid crystal alignment function layer are formed by a mask exposure method. 4. A color liquid crystal display device manufactured using the color filter for a liquid crystal display device according to claim 1.