WO2016121799A1

WO2016121799A1 - Color filter substrate and display device

Info

Publication number: WO2016121799A1
Application number: PCT/JP2016/052285
Authority: WO
Inventors: 香織齋藤; 海瀬　泰佳
Original assignee: シャープ株式会社
Priority date: 2015-01-28
Filing date: 2016-01-27
Publication date: 2016-08-04

Abstract

This color filter substrate is provided with a substrate and color filters (12). In a plurality of coloration patterns (17) of the same color of color filters (12), at least portions thereof are arranged so as to be adjacent to each other in an inclined direction. Coloration patterns (17) of a first color adjacent to each other in the inclined direction are connected by connecting sections (18). As viewed from the direction perpendicular to one face of the substrate, coloration patterns (17) of a second color facing the connecting sections (18) and coloration patterns (17) of a third color facing the connecting sections (18) are separated from each other, and connecting sections (18) are present between coloration patterns (17) of the second color and coloration patterns (17) of the third color.

Description

Color filter substrate and display device

The present invention relates to a color filter substrate and a display device.
This application claims priority based on Japanese Patent Application No. 2015-014480 filed in Japan on January 28, 2015, the contents of which are incorporated herein by reference.

For example, a photolithography method is widely known as a method for producing a color filter used in a display device such as a liquid crystal display device. When a color filter is manufactured using a photolithography method, irregularities may be formed on the surface of the color filter due to manufacturing variations. In this case, the thickness of the liquid crystal layer becomes uneven due to the unevenness of the color filter. As a result, problems such as light leakage and coloring occur, and the display quality of the liquid crystal display device may deteriorate. In order to solve this problem, in Patent Document 1, after forming colored pixels so that the peripheral portions of adjacent colored pixels overlap on the black matrix, a polishing process is performed, and the height of the protrusions of the colored pixels generated by the overlapping Is reduced to 0.5 μm or less.

In Patent Document 2, there is an overlap at the boundary between pixel patterns having different colors, corner portions of the pixel patterns facing different pixel patterns are cut off obliquely, and pixel patterns having different colors have diagonal sides. A color filter in a form of being in contact with each other is disclosed. This patent document describes that even if two-color pixel patterns overlap each other at a boundary portion where the three-color pixel patterns are adjacent to each other, the overlap of the three-color pixel patterns can be prevented.

JP 2008-281678 A Japanese Patent Laid-Open No. 62-19804

However, each of the above two patent documents has problems.
In the method of Patent Document 1, there is a possibility that the height of the overlapping portion changes depending on the overlapping state of the colored pixels, and it is difficult to polish all the overlapping portions in the same manner so as to make the same height. Further, it is necessary to add a polishing step to the color filter manufacturing process, which increases the load of the manufacturing process.

In the method of Patent Document 2, even if the overlapping of the three layers of pixel patterns can be eliminated, the overlapping of the two layers of pixel patterns still remains. Since the central part of the pixel pattern is composed of one layer, a step corresponding to the film thickness of the pixel pattern occurs between the central part and the peripheral part of the pixel pattern. As a result, display defects may occur.

One aspect of the present invention is a color filter substrate that can reduce the level difference at the boundary of the colored pattern as much as possible without increasing the load of the manufacturing process. Another embodiment of the present invention is a display device that can suppress display defects caused by the steps of the color filter by including the color filter substrate.

A color filter substrate according to an aspect of the present invention includes a substrate, a plurality of first color patterns arranged in a first direction and a second direction orthogonal to each other on one surface of the substrate, and a second color A color filter having at least a plurality of coloring patterns of the third color, and at least a part of the plurality of coloring patterns of the same color constituting the color filter is the first color The first color coloring patterns adjacent to each other in the direction and the third direction intersecting with the second direction are adjacent to the first color coloring pattern. The second color coloring pattern facing the connection portion and the third color coloring pattern facing the connection portion are separated from each other when viewed from a direction perpendicular to one surface of the substrate. And the one in which connecting part is present between the said and the second color of the colored pattern the third color of the colored pattern.

In the color filter substrate according to one aspect of the present invention, the corners of the second color coloring pattern facing the connecting portion and the corners of the third color coloring pattern facing the connecting portion are connected to each other. It may be cut out parallel to the edge of the part.

In the color filter substrate according to one aspect of the present invention, when viewed from a direction perpendicular to one surface of the substrate, the connecting portion does not overlap with the coloring pattern of the second color, and the third color of the substrate. You may have at least the area | region which does not overlap with a coloring pattern.

In the color filter substrate of one aspect of the present invention, when viewed in a cross section perpendicular to the extending direction of the connecting portion, the upper surface of the colored pattern of the first color and the upper surface of the colored pattern of the second color It is preferable that the top surfaces of the third color coloring patterns are substantially on the same plane.

The color filter substrate according to one aspect of the present invention includes a light-shielding pattern extending in at least one of the first direction and the second direction on one surface of the substrate, and is viewed from a direction perpendicular to the one surface of the substrate. The connecting portion may overlap the light shielding pattern.

The display device according to one aspect of the present invention includes the color filter substrate according to one aspect of the present invention.

A display device according to an aspect of the present invention includes a pair of substrates and a liquid crystal layer sandwiched between the pair of substrates, and one of the pair of substrates is the color filter substrate. There may be.

A display device according to an aspect of the present invention includes a spacer for maintaining a distance between the pair of substrates, and at least a part of the spacer is connected to the connecting portion when viewed from a direction perpendicular to one surface of the substrate. It may overlap.

In the display device according to one aspect of the present invention, the spacer is provided so as to overlap with a part of the connecting portions of the plurality of connecting portions, and the width of the connecting portion overlapping the spacer is overlapped with the spacer. The structure which is wider than the width of the connecting portion which does not have to be used.

According to one aspect of the present invention, it is possible to obtain a color filter substrate that can reduce the level difference at the boundary of the colored pattern as much as possible without increasing the load of the manufacturing process. According to one aspect of the present invention, it is possible to suppress a display defect due to a step of a color filter and obtain a display device having excellent display quality.

It is a disassembled perspective view which shows schematic structure of the liquid crystal display device of 1st Embodiment. It is a top view of the liquid crystal display device of 1st Embodiment. FIG. 3 is a cross-sectional view of the liquid crystal cell along the line A-A ′ of FIG. 2. FIG. 3 is a cross-sectional view of the liquid crystal cell along the line B-B ′ in FIG. 2. (A), (B) It is a figure for demonstrating the problem of the conventional color filter board | substrate. (A) to (C) are diagrams for explaining the effect of the color filter substrate of the present embodiment on the problem. It is a figure for demonstrating the problem of the liquid crystal display device of a horizontal electric field mode. It is sectional drawing which shows the liquid crystal cell of the modification of 1st Embodiment. It is a top view of the liquid crystal display device of 2nd Embodiment. It is a top view of the liquid crystal display device of 3rd Embodiment. It is a top view of the liquid crystal display device of the modification of 3rd Embodiment. It is a top view of the liquid crystal display device of 4th Embodiment. It is a figure for demonstrating the effect of the liquid crystal display device of 4th Embodiment. It is a figure for demonstrating the problem of the conventional liquid crystal display device.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
The liquid crystal display device of the first embodiment includes a common electrode and a pixel electrode on one of a pair of substrates sandwiching a liquid crystal layer, and drives the liquid crystal by an electric field applied between the common electrode and the pixel electrode. This is a liquid crystal display device of a horizontal electric field type, particularly an AFFS (Advanced Fringe Field Switching) type.

FIG. 1 is an exploded perspective view showing a schematic configuration of the liquid crystal display device of the first embodiment. FIG. 2 is a plan view of the liquid crystal display device of the first embodiment. FIG. 3 is a cross-sectional view of the liquid crystal cell along the line AA ′ of FIG. FIG. 4 is a cross-sectional view of the liquid crystal cell along the line BB ′ in FIG.
In the following drawings, in order to make each component easy to see, the scale of the size may be varied depending on the component.

As shown in FIG. 1, the liquid crystal display device 1 includes a backlight 2, a polarizing plate 3, a liquid crystal cell 4, and a polarizing plate 5 from the back side (the lower side in FIG. 1) as viewed from the observer. I have. Thus, the liquid crystal display device 1 is a transmissive liquid crystal display device including the backlight 2. The liquid crystal display device 1 performs display by controlling the transmittance of light emitted from the backlight 2 by the liquid crystal cell 4.
In the following description, the left-right direction of the screen when the observer looks at the liquid crystal display device 1 is referred to as a horizontal direction, and the up-down direction of the screen is referred to as a vertical direction. The horizontal direction is the x-axis direction, the vertical direction is the y-axis direction, and the thickness direction of the liquid crystal display device is the z-axis direction. The x-axis direction, the y-axis direction, and the z-axis direction are orthogonal to each other.

The liquid crystal cell 4 includes a pair of substrates composed of a TFT array substrate 6 and a color filter substrate 7 which are arranged to face each other. The liquid crystal layer 8 is sandwiched between the TFT array substrate 6 and the color filter substrate 7. A positive liquid crystal material is generally used for the liquid crystal layer 8, but a negative liquid crystal material may be used. The TFT array substrate 6 has a plurality of subpixels 10 arranged in a matrix on a substrate 9. These sub-pixels 10 constitute pixels, and a plurality of pixels constitute a display area (screen). The color filter substrate 7 includes a color filter 12 on a transparent substrate 11.

Although not shown in FIG. 1, the display area includes a plurality of source bus lines (signal lines) arranged in parallel to each other and a plurality of gate bus lines (scanning lines) arranged in parallel to each other. ing. The plurality of source bus lines and the plurality of gate bus lines are arranged to cross each other. The display area is partitioned in a lattice pattern by a plurality of source bus lines and a plurality of gate bus lines, and each partitioned substantially rectangular area is a sub-pixel 10. One sub-pixel 10 corresponds to any one of the red (R), green (G), and blue (B) coloring patterns of the color filter 12. The “coloring pattern” in the present specification is a minimum unit region of a specific color of the color filter 12 corresponding to one subpixel.

The liquid crystal display device 1 of the present embodiment has a resolution called pseudo 4K2K. The pseudo 4K2K liquid crystal display device has the number of pixels of 2160 × 3840 and the number of subpixels of 2160 × 2 × 3840. That is, in the case of pseudo 4K2K, although subpixels of three colors of red, green, and blue exist, any two of them (two) subpixels constitute one pixel. That is, the plurality of pixels include a pixel composed of a red subpixel and a green subpixel, a pixel composed of a blue subpixel and a red subpixel, and a green subpixel and a blue subpixel. The pixel comprised by these is included. Therefore, for example, in a pixel constituted by a red sub-pixel and a green sub-pixel, a blue sub-pixel is insufficient. For this pixel, the blue sub-pixel belonging to the adjacent pixel is driven in a time-sharing manner to compensate for the blue color. As described above, in the pseudo 4K2K liquid crystal display device, a resolution substantially equivalent to 4K2K can be realized even if the number of subpixels is smaller than that of 4K2K. This type of liquid crystal display device is disclosed in US Pat. No. 8,786,645.

When the above pseudo 4K2K method is employed, the liquid crystal display device includes a color filter substrate having a colored pattern arrangement shown in FIG. FIG. 2 shows a state in which the subpixels in 3 rows and 6 columns are enlarged.
The color filter substrate 7 includes a transparent substrate 11 (see FIG. 3), a black matrix 14 provided on one surface of the transparent substrate 11, and a color filter 12. FIG. 2 is a diagram of the color filter substrate 7 viewed from the liquid crystal layer 8 side (a diagram in a state where the color filter substrate 7 of FIG. 1 is turned over). Therefore, the color filter 12 is arranged on the front side of FIG. 2, and the black matrix 14 is arranged on the back side of the color filter 12.
The black matrix 14 of the present embodiment corresponds to the light shielding pattern in the claims.

The black matrix 14 has a lattice shape in which a plurality of vertical linear portions 15 extending in the vertical direction on one surface of the transparent substrate 11 and a plurality of horizontal linear portions 16 extending in the horizontal direction are orthogonal to each other. The black matrix 14 is made of a light shielding material such as a black resin or a metal such as chromium. The black matrix 14 has a plurality of rectangular openings 14H arranged in a matrix. The opening 14 </ b> H is a substantial display area in the sub-pixel 10.
In the present embodiment, the horizontal linear portion 16 is thicker than the vertical linear portion 15. That is, when the width of the vertical linear portion 15 is W1 and the width of the horizontal linear portion 16 is W2, W1 <W2.

The color filter 12 has a plurality of red patterns 17R, a plurality of green patterns 17G, and a plurality of blue patterns 17B arranged in the horizontal and vertical directions of the screen. In the top row of FIG. 2, the coloring pattern 17 is arranged in the order of a red pattern 17R, a green pattern 17G, a blue pattern 17B,... From the left end to the right end. In the second row from the top in FIG. 2, the coloring pattern 17 is arranged in the order of the blue pattern 17B, the red pattern 17R, the green pattern 17G,... From the left end to the right end. In the bottom row of FIG. 2, the coloring pattern 17 is arranged in the order of the green pattern 17G, the blue pattern 17B, the red pattern 17R,... From the left end to the right end. The area outside the range shown in FIG. 2 is a repetition of the pattern of FIG.
The horizontal direction (x-axis direction) of the present embodiment corresponds to the first direction of the claims. The vertical direction (y-axis direction) of the present embodiment corresponds to the second direction of the claims.

The plurality of colored patterns 17 of the same color constituting the color filter 12 are arranged adjacent to each other in an oblique direction intersecting the horizontal direction and the vertical direction. Specifically, a red pattern 17R is arranged diagonally to the lower right of the red pattern 17R at the upper left end in FIG. 2, and a red pattern 17R is arranged obliquely to the lower right of the second red pattern 17R from the middle left. The green pattern 17G and the blue pattern 17B are the same as the red pattern 17R.
The arrangement of the colored patterns 17 of the color filter 12 is called a so-called mosaic arrangement.
The oblique direction of the present embodiment corresponds to the third direction of the claims.

The colored patterns 17 adjacent to each other in the diagonal direction are connected to each other by the connecting portion 18 integrated with the two colored patterns 17. For convenience of explanation, one rectangular shape in which the color filter 12 is partitioned in a grid pattern at the center line of each of the

linear portions

15 and 16 of the black matrix 14 is defined as a basic shape of each coloring pattern 17. In FIG. 2, the connecting portion 18 is a portion obtained by extending the lower right corner of the basic shape of the rectangle obliquely downward to the right and a portion obtained by extending the upper left corner of the rectangle obliquely upward to the left. An angle θ1 formed between the upper side (or the lower side) of the coloring pattern 17 and the edge 18E of the connecting portion 18 is θ1 = 45 ° in the present embodiment. In the present specification, a direction parallel to the edge 18 </ b> E of the connecting portion 18 is defined as an extending direction of the connecting portion 18. The extending direction of the connecting portion 18 is indicated by an arrow F.

The connecting portion 18 overlaps with the black matrix 14. More specifically, the connecting portion 18 overlaps the intersecting portion of the vertical linear portion 15 and the horizontal linear portion 16 constituting the black matrix 14. The width W0 of the connecting portion 18 is preferably about 3 to 7 μm, for example, and is 4 μm, for example. By keeping the width W <b> 0 of the connecting portion 18 within an appropriate numerical range without excessively widening the connecting portion 18, the entire connecting portion 18 overlaps the black matrix 14 without protruding from the black matrix 14.

For example, when focusing on the red pattern 17R, the corners of the basic shape (rectangular shape) of the green pattern 17G facing the connecting portion 18 of the red pattern 17R and the basic shape of the blue pattern 17B facing the connecting portion 18 of the red pattern 17R ( The corners of the (rectangular) are notched obliquely in parallel with the edge 18E of the connecting portion 18. With such a pattern shape, when viewed from a direction perpendicular to one surface of the transparent substrate 11, the green pattern 17G and the blue pattern 17B facing the connecting portion 18 are separated from each other at the connecting portion 18 portion of the red pattern 17R, and the green pattern 17B is green. A connecting portion 18 of the red pattern 17R exists between the pattern 17G and the blue pattern 17B.

In other words, the connecting portion 18 of the red pattern 17R has at least a region that does not overlap with the green pattern 17G and does not overlap with the blue pattern 17B. The green pattern 17G and the blue pattern 17B are the same as the red pattern 17R. That is, the red pattern 17R, the green pattern 17G, and the blue pattern 17B have a shape in which the convex portions and the concave portions fit into each other like a jigsaw puzzle.

3 and 4, the liquid crystal cell 4 includes a TFT array substrate 6, a color filter substrate 7, and a liquid crystal layer 8 sandwiched between the TFT array substrate 6 and the color filter substrate 7. The TFT array substrate 6 may be a well-known TFT array substrate of the AFFS system, and detailed description is omitted, but the transparent substrate 20, the gate layer 21, the gate insulating film 22, the interlayer insulating film 23, the source layer 24, and the planarizing film. 25, a common electrode 26, an insulating film 27, a comb-like pixel electrode 28, an alignment film 29, and the like.

The color filter substrate 7 includes a transparent substrate 11, a black matrix 14, a color filter 12, an overcoat layer 31, and an alignment film 32. In the color filter 12, the side surfaces 17 a of the two adjacent colored patterns 17 of different colors are in contact with each other on the black matrix 14. The overcoat layer 31 has a function of covering the surface of the color filter 12 and alleviating the level difference of the color filter 12.

FIG. 5A is a plan view of a color filter in which colored patterns of the same color are arranged so as to be adjacent to each other in an oblique direction, that is, a general color filter having a so-called mosaic arrangement. As shown in FIG. 5A, when this type of color filter 101 is manufactured by the photolithography method, if it can be manufactured according to the design of the photomask, the corner portion of the colored pattern 117 corresponding to the peripheral portion of the subpixel is formed. The three different

colored patterns

117R, 117G, and 117B are in contact with each other. In this case, the three

colored patterns

117R, 117G, and 117B do not overlap.

However, as a result of actually manufacturing the color filter 101, the portions where the different three

colored patterns

117R, 117G, and 117B should be in contact with each other as shown by the reference numeral D1 in FIG. Mode failure may occur. Or, as shown by the reference numeral D2 in FIG. 5B, the colored pattern 117R of the same color is connected at the corner portion, and further, the mode defect in which the connected portion overlaps with the

colored patterns

117G and 117B of other colors occurs. There is. Thus, due to various variation factors in the manufacturing process, it is actually difficult to manufacture an ideal color filter 101 having no defects as shown in FIG.

When viewed in a cross-sectional view, as shown in FIG. 6C, as a defect mode, for example, a portion D3 where the colored pattern 117 to be formed is not formed, a portion D4 where two colored patterns 117 overlap, May cause a location D5 where the three colored patterns 117 overlap. At this time, a level difference approximately three times as large as the film thickness t of the colored pattern 117 is generated at a location D3 where the colored pattern 117 to be formed is not formed and a location D5 where the three-color colored pattern 117 overlaps. . If the thickness t of the colored pattern 117 is 1 μm, the maximum step on the surface of the color filter substrate 107 reaches 3 μm. When such a large level difference occurs, it is difficult to eliminate the level difference even if it is covered with an overcoat layer. As a result, the liquid crystal layer thickness becomes non-uniform, which may cause display defects.

On the other hand, in the color filter substrate 7 of the present embodiment, the colored pattern 17 of the other color facing the connecting portion 18 of the colored pattern 17 of one color is cut obliquely in parallel with the edge 18E of the connecting portion 18. It is missing. Thereby, in the part of the connection part 18, the coloring patterns 17 of the other two colors are separated from each other, and the connection part 18 exists between these coloring patterns 17. Therefore, as shown in FIG. 6A, the upper surface of the red pattern 17R, the upper surface of the green pattern 17G, and the upper surface of the blue pattern 17B are on the same plane in the cross section perpendicular to the extending direction of the connecting portion 18. It becomes. In this case, no step is generated on the surface of the color filter substrate 7.

Ideally, as shown in FIG. 6A, the upper surfaces of all the colored patterns 17 are preferably on the same plane. However, when the color filter substrate 7 is actually manufactured, two adjacent colored patterns 17 may overlap as shown in FIG. 6B. Even in that case, the interval between the two colored patterns 17 facing each other across the connecting portion 18 is several μm, and the two colored patterns 17 are sufficiently separated. Therefore, in the present embodiment, the three colored patterns 17 cannot all overlap. Even when the two color patterns 17 overlap, as shown in FIG. 6C, the one color pattern 117 does not overlap until it completely rides on the adjacent color pattern 117. By optimizing the design of the mask pattern, it is possible to suppress the two colored patterns 17 to slightly overlap.

As shown in FIG. 6B, the step Δt that occurs when the two colored patterns 17 slightly overlap is sufficiently small with respect to the film thickness t of the colored patterns 17. In this case, in the cross section perpendicular to the extending direction of the connecting portion 18, the upper surface of the red pattern 17R, the upper surface of the green pattern 17G, and the upper surface of the blue pattern 17B are substantially on the same plane. In the present invention, when the difference in height between the upper surface of the red pattern 17R, the upper surface of the green pattern 17G, and the upper surface of the blue pattern 17B is smaller than the film thickness of the colored pattern 17, “the upper surface of the red pattern 17R, the green pattern The upper surface of 17G and the upper surface of the blue pattern 17B are substantially on the same plane. "

In the color filter substrate of Patent Document 2 described in [Background Art], two colored patterns are intentionally overlapped at the periphery of the colored pattern. Therefore, a step having a height corresponding to at least the thickness of the colored pattern always occurs between the central portion and the peripheral portion of the colored pattern. On the other hand, in the color filter substrate 7 of the present embodiment, even if the three colored patterns 17 are the corners of the adjacent colored pattern 17, only one of the colored patterns 17 exists. There is no difference in level. Even if a step is generated due to manufacturing variation or the like, the height of the step is slight. Further, since the connecting portion 18 overlaps with the black matrix 14, the display is not adversely affected by the connecting portion 18. Therefore, by using this color filter substrate 7, display defects such as light leakage and coloring can be suppressed, and the liquid crystal display device 1 having excellent display quality can be realized. Further, unlike the Patent Document 1 described in the section of “Background Art”, a polishing process is not required, so that the manufacturing process is not burdened.

In particular, when the color filter substrate 7 of the present embodiment is applied to a horizontal electric field type liquid crystal display device, the following effects can be obtained. In general, a horizontal electric field type liquid crystal display device has excellent viewing angle characteristics, and a good display can be obtained even when an observer views the screen from the wide angle side. However, as shown in FIG. 7, in the case of the liquid crystal display device 101 of the comparative example, when two adjacent colored patterns 117 overlap, a part of the light L incident on the color filter substrate 107 with a large incident angle is obtained. The overlapping portion of the two colored patterns 117 is transmitted. As a result, there is a color mixing problem that when the observer looks at the screen from the wide-angle side, the colors of adjacent sub-pixels appear to be mixed. For example, as shown in FIG. 7, when the observer looks at the blue sub-pixel (blue pattern 117 </ b> B) from an oblique direction (the tip side of the arrow L), there is a problem that green appears to be mixed with blue.

On the other hand, in the case of the present embodiment, since the two adjacent colored patterns 17 do not overlap, as shown in FIG. 4, the light L incident on the color filter substrate 7 with a large incident angle overlaps the colored pattern 17. Does not pass through. In the example of FIG. 4, the light L transmits only the green pattern 17G. For example, when the observer views the green sub-pixel from an oblique direction (the tip side of the arrow L), only the green color can be seen, and the problem of color mixing does not occur. Even if the colored patterns 17 do not overlap, color mixing may occur in some cases. Therefore, by optimizing the line width and space width of the pixel electrode 28, the thickness of the liquid crystal layer 8, the width of the black matrix 14, the film thickness of the color filter 12 (colored pattern 17), etc., color mixing is prevented. ing. In particular, by reducing the film thickness of the color filter 12 (colored pattern 17), there is less risk of light escaping across two adjacent colored patterns, and color mixing can be prevented.

In the present embodiment, the color filter substrate 7 is applied to a horizontal electric field type liquid crystal display device, but the color filter substrate 7 can also be applied to a liquid crystal display device other than the horizontal electric field method. For example, the color filter substrate 7 can be applied to a vertical alignment (VA) type liquid crystal display device.
FIG. 8 is a cross-sectional view of a VA liquid crystal display device. In FIG. 8, the same components as those in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 8, in the liquid crystal display device 41, the pixel electrode 43 is provided on the TFT array substrate 42, and the counter electrode 45 is provided on the color filter substrate 44. On the counter electrode 45 of the color filter substrate 44, a convex portion 46 is provided at the center of each sub-pixel so as to protrude toward the liquid crystal layer 8. The convex part 46 is for controlling the alignment direction of the liquid crystal for each sub-pixel and realizing the multi-domain of the liquid crystal layer 8.

Also in the liquid crystal display device 41 of the modified example, the same effect as in the present embodiment that the step of the color filter can be reduced without increasing the load of the manufacturing process and a liquid crystal display device with excellent display quality can be realized. The color filter substrate of the present invention can be applied to various liquid crystal display devices other than the horizontal electric field method and the VA method.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to FIG.
The basic configuration of the liquid crystal display device of the second embodiment is the same as that of the first embodiment, and the configuration of the color filter substrate is different from that of the first embodiment. Therefore, in the second embodiment, description of the liquid crystal display device is omitted, and only the color filter substrate is described.
FIG. 9 is a plan view of the liquid crystal display device of the second embodiment.
9, the same code | symbol is attached | subjected to the same component as FIG. 2 of 1st Embodiment, and description is abbreviate | omitted.

As shown in FIG. 9, in the color filter substrate 49 of the second embodiment, the arrangement of the colored patterns 17 is the same as that of the first embodiment. However, in the first embodiment, as shown in FIG. 2, the angle θ1 formed by the upper side (or the lower side) of the coloring pattern 17 and the edge 18E of the connecting portion 18 is 45 °. On the other hand, in the second embodiment, the angle θ2 formed by the upper side (or the lower side) of the coloring pattern 17 and the edge 50E of the connecting portion 50 is an angle smaller than 45 °. The angle θ2 is 30 °, for example. That is, the connecting part 50 of this embodiment is inclined at an angle closer to the horizontal direction than the connecting part 18 of the first embodiment.

With the difference in inclination of the connecting portion 50, in the black matrix 51 of the present embodiment, the width W2 ′ of the horizontal linear portion 52 is smaller than the width W2 of the horizontal linear portion 16 of the first embodiment (W2 ′ <W2). ). The width W1 of the vertical linear portion 15 is the same as that in the first embodiment. Moreover, with the difference in the inclination of the connecting part 50, the width W0 ′ of the connecting part 50 is also smaller than the width W2 of the connecting part 18 of the first embodiment. However, like the first embodiment, the width W0 ′ of the connecting portion 50 is preferably about 3 to 7 μm so that the other colored patterns 17 facing the connecting portion 50 do not approach each other.
Other configurations are the same as those of the first embodiment.

Also in the second embodiment, the same effects as those in the first embodiment can be obtained in which the step of the color filter can be reduced without increasing the load of the manufacturing process, and a liquid crystal display device excellent in display quality can be realized.

Furthermore, in the case of the present embodiment, since the width W2 'of the black matrix 51, particularly the horizontal linear portion 52, can be made smaller than that of the first embodiment, the aperture ratio can be increased. As a result, a liquid crystal display device with high light utilization efficiency can be realized. Note that the inclination of the connecting portion 50 can be determined as appropriate in accordance with the width of the black matrix 51. Also in this case, it is necessary to prevent the connecting portion 51 from protruding from the black matrix 51.

[Third Embodiment]
Hereinafter, a third embodiment of the present invention will be described with reference to FIGS. 10 and 11.
The basic configuration of the liquid crystal display device of the third embodiment is the same as that of the first embodiment, and the configuration of the color filter substrate is different from that of the first embodiment.
FIG. 10 is a plan view of the liquid crystal display device of the third embodiment. In FIG. 10, the black matrix is not shown.
10, the same code | symbol is attached | subjected to the same component as FIG. 2 of 1st Embodiment, and description is abbreviate | omitted.

In the color filter substrate 7 of the first embodiment, the pattern shown in FIG. 2 is a repetitive unit, and the colored pattern 17 of one color is in one direction (specifically, diagonally lower right) over the entire liquid crystal cell. Had been placed. On the other hand, in the color filter substrate 55 of the second embodiment, as shown in FIG. 10, the uppermost colored pattern 17 to the third colored pattern 17 are sequentially arranged diagonally to the lower right. The fourth colored pattern 17 from the top is arranged diagonally to the left of the third colored pattern 17 from the top.

Accordingly, the extending direction of the connecting portion 18 that connects the uppermost colored pattern 17 and the second colored pattern 17 from the top, and the second colored pattern 17 and the third colored from the top. The extending direction of the connecting portion 18 that connects the pattern 17 is a direction from the upper left to the lower right.
On the other hand, the extending direction of the connecting portion 56 that connects the third colored pattern 17 from the top and the fourth colored pattern 17 from the top is the direction from the upper right to the lower left. In the color filter substrate 55 of the second embodiment, the pattern shown in FIG. 10 is a repeating unit, and the colored pattern 17 of one color is arranged in a zigzag pattern over the entire liquid crystal cell.

Also in the third embodiment, the same effects as those in the first and second embodiments can be obtained, in which the step of the color filter can be reduced without increasing the load of the manufacturing process, and a liquid crystal display device excellent in display quality can be realized. .

In addition, the repeating unit of the coloring pattern 17 is not necessarily limited to the pattern of FIG. 10, and can be changed as appropriate. For example, like the color filter substrate 58 shown in FIG. 11, the uppermost colored pattern 17 to the fourth colored pattern 17 from the top are sequentially arranged diagonally to the lower right, and the uppermost colored pattern 17 from the upper to the upper colored pattern 17. To the sixth colored pattern 17 may be sequentially arranged diagonally to the lower left.

[Fourth Embodiment]
Hereinafter, a fourth embodiment of the present invention will be described with reference to FIGS.
The basic configuration of the liquid crystal display device of the fourth embodiment is the same as that of the first embodiment, and the configuration of the color filter substrate is different from that of the first embodiment.
FIG. 12 is a plan view of the liquid crystal display device of the fourth embodiment.
12 to 14, the same reference numerals are given to the same components as those used in the first embodiment, and the description thereof will be omitted.

Although not described in the first embodiment, the liquid crystal cell 4 is provided with a spacer for keeping the distance between the TFT array substrate 6 and the color filter substrate 7 (the thickness of the liquid crystal layer 8) constant. As shown in FIG. 12, in the color filter substrate 61 of this embodiment, the spacer 62 is provided at the intersection of the vertical linear portion 15 and the horizontal linear portion 16 of the black matrix 63. The spacers 62 are not provided at all intersections between the vertical linear portions 15 and the horizontal linear portions 16. The plurality of spacers 62 are provided at predetermined intervals throughout the liquid crystal cell. The spacer 62 is made of a photosensitive resin such as an acrylic resin, and is formed in a cylindrical shape by a photolithography method.

In general, liquid crystal alignment is disturbed in the vicinity of the spacer, which may cause light leakage. Therefore, as shown in FIG. 12, the width of the black matrix 63, which is the location where the spacer 62 is formed, is increased with respect to other portions so as to shield the spacer 62 and the vicinity thereof.
In FIG. 12, a portion where the black matrix 63 is expanded in a diamond shape is referred to as a widened portion 64.

Since the black matrix 63 where the spacer 62 is arranged has the widened portion 64, the connecting portion 65 that overlaps the spacer 62 is within the range that does not protrude from the black matrix 63, and is more than the connecting portion 18 that does not overlap the spacer 62. It can be formed wide. That is, if the width of the connecting portion 18 that does not overlap the spacer 62 is W0 and the width of the connecting portion 65 that overlaps the spacer 62 is W0 ″, then W0 ″> W0. Thus, the spacer 62 overlaps with the widened portion 64 of the black matrix 63 and also overlaps with the connecting portion 65 of the colored pattern 17. In the present embodiment, the diameter of the spacer 62 is smaller than the width W0 ″ of the connecting portion 65.

Also in the fourth embodiment, the same effects as those in the first to third embodiments can be obtained, in which the step of the color filter can be reduced without increasing the load of the manufacturing process, and a liquid crystal display device excellent in display quality can be realized. .

FIG. 13 is a cross-sectional view of the color filter substrate 61 where the spacer 62 is formed. FIG. 14 is a cross-sectional view of a color filter substrate 101 of a comparative example at a position corresponding to FIG.
As shown in these drawings, the spacer 62 is formed on the overcoat layer 31 of the color filter substrate. At this time, in the case where a spacer is formed above one colored pattern, as shown in FIG. 14, if the spacer 62 is formed at a location where the colored pattern 117 is not formed due to manufacturing variation, The height (the height of the portion protruding from the upper surface of the overcoat layer 31) is reduced. On the contrary, if the spacer 62 is formed at the place where the two colored patterns 117 overlap, the substantial height of the spacer 62 is increased. In this case, the height of the plurality of spacers 62 arranged in the plane of the color filter substrate 101 varies, and it becomes difficult to keep the distance (the thickness of the liquid crystal layer) between the TFT array substrate and the color filter substrate constant. . As a result, the risk of display unevenness increases.

On the other hand, in this embodiment, as shown in FIG. 12, the connecting portion 65 where the spacer 62 is disposed is wider than the connecting portion 18 where the spacer 62 is disposed. Then, compared with other places, the overlapping of the colored patterns 17 of the two colors is further less likely to occur. Even if the two colored patterns 17 are slightly overlapped at the periphery of the connecting portion 65, the central portion of the connecting portion 65 is flat. Under such a state, as shown in FIG. 13, the spacer 62 is formed above the central portion of the wide connecting portion 65. Therefore, the height of the plurality of spacers 62 arranged in the plane of the color filter substrate 7 can be made constant. As a result, according to the liquid crystal display device of the present embodiment, display unevenness can be suppressed.

In this embodiment, the widened portion 64 is provided in the black matrix 63 where the spacer 62 is formed, but the widened portion is not necessarily provided. For example, if the spacer diameter is small and the alignment disorder of the liquid crystal is small, the widened portion may not be provided in the black matrix. Even in such a case, if the spacer is formed so as to overlap the connecting portion, the height of the spacer becomes constant, and an effect of suppressing display unevenness can be obtained.

In the present embodiment, the width W0 ″ of the connecting portion 65 is larger than the diameter of the spacer 62, but the width of the connecting portion may be equal to the diameter of the spacer or smaller than the diameter of the spacer. Even if not all of the one spacer overlaps with the connecting portion, the effect of this embodiment can be obtained as long as at least a part of one spacer overlaps with the connecting portion.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, an example of a color filter substrate having three colored patterns of red, green, and blue has been described. However, the present invention can also be applied to a color filter substrate having four or more colored patterns. . In the above-described embodiment, an example in which all of the plurality of colored patterns of the same color are arranged so as to be adjacent to each other in the oblique direction has been described. However, all the colored patterns are not necessarily arranged to be adjacent to each other in the oblique direction. Also good. The color filter substrate may include, for example, a portion in which a plurality of colored patterns are adjacent in the vertical direction. In that case, the present invention may be applied to a portion where a plurality of colored patterns are adjacent in the oblique direction.

In the above embodiment, the color filter substrate is provided with a grid-like black matrix. However, the color filter substrate may be provided with a light-shielding pattern including either one of a vertical linear portion and a horizontal linear portion. . Alternatively, a black matrix may be provided on the TFT array substrate. In addition, the shape, number, arrangement, constituent material, manufacturing method, and the like of each part of the color filter substrate and the liquid crystal display device are not limited to the above embodiment, and can be changed as appropriate. The color filter substrate of the present invention can also be applied to a display device provided with a color filter other than a liquid crystal display device such as an organic electroluminescence display device.

The present invention can be used for various display devices such as liquid crystal display devices and organic electroluminescence display devices, and color filter substrates.

DESCRIPTION OF SYMBOLS 1,41 ... Liquid

crystal display device

6,42 ...

TFT array substrate

7,44,49,55,58,61 ... Color filter substrate 8 ... Liquid crystal layer 11 ... Transparent substrate (substrate)
12 ...

Color filters

14, 51, 63 ... Black matrix (light shielding pattern)
17 ... Colored pattern 17R ... Red pattern 17G ... Green pattern 17B ...

Blue pattern

18, 50, 56, 65 ... Connection part 62 ... Spacer

Claims

A substrate,
A plurality of coloring patterns of a first color, a plurality of coloring patterns of a second color, and a plurality of colorings of a third color arranged in a first direction and a second direction orthogonal to each other on one surface of the substrate A color filter having at least a pattern;
With
At least a part of the plurality of colored patterns of the same color constituting the color filter is arranged so as to be adjacent to the first direction and a third direction intersecting the second direction,
The colored patterns of the first color adjacent to each other in the third direction are connected to each other by a connecting part integrated with the colored pattern of the first color,
When viewed from a direction perpendicular to the one surface of the substrate, the second color coloring pattern facing the connecting portion and the third color coloring pattern facing the connecting portion are separated from each other, and A color filter substrate in which the connecting portion is present between a coloring pattern and the third color coloring pattern.
The corner of the coloring pattern of the second color facing the connecting portion and the corner of the coloring pattern of the third color facing the connecting portion are notched in parallel with the edge of the connecting portion. Item 2. The color filter substrate according to Item 1.
2. The connection portion includes at least a region that does not overlap with the second color coloring pattern and does not overlap with the third color coloring pattern when viewed from a direction perpendicular to one surface of the substrate. Or the color filter board | substrate of Claim 2.
In the cross section perpendicular to the extending direction of the connecting portion, the upper surface of the colored pattern of the first color, the upper surface of the colored pattern of the second color, and the upper surface of the colored pattern of the third color are substantially the same. The color filter substrate according to claim 3, which is on a plane.
A light-shielding pattern extending in at least one of the first direction and the second direction on one surface of the substrate;
The color filter substrate according to any one of claims 1 to 4, wherein the connecting portion overlaps the light shielding pattern when viewed from a direction perpendicular to one surface of the substrate.
A display device comprising the color filter substrate according to any one of claims 1 to 5.
A pair of substrates;
A liquid crystal layer sandwiched between the pair of substrates,
The display device according to claim 6, wherein one of the pair of substrates is the color filter substrate.
A spacer for maintaining a distance between the pair of substrates;
The display device according to claim 7, wherein at least a part of the spacer overlaps with the connecting portion when viewed from a direction perpendicular to one surface of the substrate.
The spacer is provided so as to overlap a part of the plurality of connecting portions.
The display device according to claim 8, wherein a width of the connecting portion that overlaps with the spacer is wider than a width of the connecting portion that does not overlap with the spacer.