JP5266745B2 - Color filter for horizontal electric field liquid crystal drive system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color filter for a lateral electric field liquid crystal driving mode which has high spacer height and a uniform cell gap, and is excellent in display quality. <P>SOLUTION: The color filter for the lateral electric field liquid crystal driving mode has: a black matrix 3 with a rectangular opening 2; a coloring layer having coloring portions of three colors of red, green, and blue formed on the opening 2; a layered column 6 composed of a first coloring column 16 being the coloring column of the lowermost layer, a second coloring column 26 being that of the second layer, and a third coloring column 36 being that of the uppermost layer laminated on a layered column forming section 5 of the black matrix 3; and a transparent protective layer formed for the purpose of covering the black matrix 3, the coloring layer, and the layered column 6, wherein areas of the first coloring column 16 and the second coloring column 26 on the layered column forming section 5 in plan view is 20% or more of an area of the layered column forming section 5 in plan view. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a color filter for a horizontal electric field liquid crystal drive system that has a uniform cell gap and excellent display quality when used in a liquid crystal display device.

  In recent years, with the development of personal computers, particularly portable personal computers, the demand for liquid crystal displays has increased. In recent years, the penetration rate of home-use liquid crystal televisions has been increasing, and the market for liquid crystal displays is expanding. Furthermore, liquid crystal displays that have become widespread in recent years tend to have larger screens, and this tendency is particularly strong for home-use liquid crystal televisions. In such a situation, it is desired to manufacture a liquid crystal display that has a lower cost and a higher quality with high productivity, and in particular, a color filter substrate having a function of colorizing the liquid crystal display. However, such demands are increasing because of its high cost.

In a liquid crystal display device, a color filter substrate and a liquid crystal driving side substrate (counter substrate) are opposed to each other, and a liquid crystal compound is sealed between the two to form a thin liquid crystal layer. The liquid crystal driving side substrate forms a liquid crystal array in the liquid crystal layer. Is controlled by selectively controlling the amount of light transmitted through the display-side substrate.
In such a liquid crystal display device, the gap (cell gap) between the color filter substrate and the counter substrate is the thickness of the liquid crystal layer itself, preventing display unevenness such as color unevenness and contrast unevenness, uniform display, and high-speed response. In order to provide the color liquid crystal display device with good display performance such as high performance, high contrast ratio, and wide viewing angle, it is necessary to keep the cell gap constant and uniform.

As a method for maintaining the cell gap, a method in which a large number of spherical or rod-shaped particles of a certain size made of glass, alumina, plastic, or the like are scattered as spacers in the gap has been used. There are various problems such as the spacer distribution being easily biased. As a method for solving the problems of these particulate spacers, a method (Patent Document 1) is disclosed in which a laminated spacer formed by laminating a columnar colored layer on a light shielding portion (black matrix) is used as a spacer.
However, in the laminated spacer formed by laminating such colored layers, the thickness of the colored layer constituting the laminated spacer cannot be made sufficiently thick. Therefore, the spacer should have a sufficient height. There was a problem that could not.

  On the other hand, in the color filter for a horizontal electric field liquid crystal driving method, a transparent protective layer (overcoat layer) is formed so as to cover the colored layer and the black matrix in order to prevent the elution of contaminants from the colored layer to the liquid crystal layer. As a method for forming such a transparent protective layer, a method of applying a transparent protective layer forming material for forming the transparent protective layer is generally used. Here, when the transparent protective layer forming material is applied, the transparent protective layer forming material flows down from the top of the laminated spacer onto the colored layer and the black matrix. For this reason, the thickness of the transparent protective layer formed on the laminated spacer is thin, and the thickness of the transparent protective layer formed on the colored layer and the black matrix is large. As a result, the finally formed spacer height, that is, the thickness from the surface of the transparent protective layer formed on the colored layer and the black matrix to the surface of the transparent protective layer formed on the laminated spacer, There was a problem that it was difficult to achieve a sufficient height.

Japanese Patent Laid-Open No. 5-196946

  The present invention has been made in view of the above problems, and has a high spacer height, a uniform cell gap when used in a liquid crystal display device, and a lateral electric field that can be excellent in display quality. The main object is to provide a color filter for a liquid crystal drive system.

  In order to solve the above problems, the present invention provides a substrate, a black matrix formed on the substrate and having a rectangular opening having a short side and a long side, and red, green formed on the opening. And the three colored layers formed in the openings adjacent to each other in the long side direction, and the three color layers having the same color, and the openings adjacent in the long side direction. A first colored column that is a lowermost colored column, a second colored column that is a colored column in the second layer, and a third colored column that is a colored column in the uppermost layer are formed on the layered column forming portion of the black matrix sandwiched by A color for a lateral electric field liquid crystal driving system, which is laminated and has a laminated column in which each colored column is composed of a colored layer of each color, and a transparent protective layer formed so as to cover the black matrix, the colored layer, and the laminated column The filter, the first colored column Preliminary plan view area of the stacked pillar forming portion of the second colored pillar provides a horizontal electric field liquid crystal driving method for a color filter, wherein at least 20% of the plan view area of the laminated column forming site.

According to the present invention, the area of the first colored column and the second colored column in the stacked column forming portion is in the above-described range, so that the thickness of the second colored column and the third colored column can be sufficiently increased. The thickness can be increased, and the height of the stacked column can be increased. For this reason, even when the transparent protective layer is formed, the height of the spacer, that is, the transparent protective layer formed on the stacked pillars from the surface of the transparent protective layer formed on the colored portion of each color. The thickness up to the surface can be made sufficiently large. As a result, when used in the liquid crystal display device, the cell gap is uniform and the display quality can be improved.
Further, the laminated column forming portion is a region sandwiched between the openings adjacent in the long side direction, so that the first colored column or the second colored column, the first colored column or the second colored column, The colored portion formed in the opening of the same color can be continuously formed. For this reason, the planar view area in the said lamination | stacking column formation site | part of the said 1st coloring column and a 2nd coloring column can be made large.

  In the present invention, at least one of the first colored column and the second colored column is on at least one side of the convex portion forming portion adjacent to the stacked column forming portion and in the short side direction of the opening of the stacked column forming portion. It is preferable that it is formed in a strip shape on the convex portion forming portion. At least one of the first colored column and the second colored column is on the laminated column forming portion and on the protruding portion forming portion on at least one side of the protruding portion forming portion adjacent to the short side direction of the opening of the laminated column forming portion. This is because the height of the stacked pillars can be increased by forming the belt in a strip shape.

  The present invention includes a substrate, a black matrix formed on the substrate and having a rectangular opening having a short side and a long side, and colored portions of three colors of red, green, and blue formed in the opening. The three-colored colored layer having the same color as the colored portion formed in the opening adjacent in the long side direction and the black matrix sandwiched by the opening adjacent in the long side direction A first colored column that is the lowest colored column, a second colored column that is the colored column of the second layer, and a third colored column that is the colored column of the uppermost layer are laminated on the column forming portion, A color filter for a lateral electric field liquid crystal driving method, wherein the column includes a stacked column including the colored layers of the respective colors and a transparent protective layer formed so as to cover the black matrix, the colored layer, and the stacked column. At least the colored column and the second colored column One side is formed in a band shape on the above-mentioned laminated column forming part and on at least one convex part forming part of the convex part forming part adjacent to the short side direction of the opening of the above-mentioned laminated column forming part. A color filter for a horizontal electric field liquid crystal driving method is provided.

According to the present invention, at least one of the first colored column and the second colored column is at least one side of the convex portion forming portion adjacent to the laminated column forming portion and in the short side direction of the opening of the laminated column forming portion. The height of the laminated pillar can be increased by being formed in a band shape on the convex forming portion.
For this reason, even when the transparent protective layer is formed, the height of the spacer, that is, the transparent protective layer formed on the stacked pillars from the surface of the transparent protective layer formed on the colored portion of each color. The thickness up to the surface can be made sufficiently large. As a result, when used in the liquid crystal display device, the cell gap is uniform and the display quality can be improved.
Further, the laminated column forming portion is a region sandwiched between the openings adjacent in the long side direction, so that the first colored column or the second colored column, the first colored column or the second colored column, The colored portion formed in the opening of the same color can be continuously formed. For this reason, the planar view area in the said lamination | stacking column formation site | part of the said 1st coloring column and a 2nd coloring column can be made large.

  In the present invention, the first colored column and the second colored column are formed in a strip shape on the laminated column forming portion and at least on one convex portion forming portion, and stacked on the convex portion forming portion. In particular, the first colored column and the second colored column are formed in a band shape on the stacked column forming portion and on the convex forming portions on both sides, and are stacked on the convex forming portions on both sides. It is preferable. This is because the height of the laminated pillar can be made higher.

In the present invention, the first colored column or the second colored column, and the colored portion that is the same color as the first colored column or the second colored column and is formed in the opening that sandwiches the laminated column forming portion. It is preferable that they are formed continuously.
The first colored column or the second colored column and the colored portion that is the same color as the first colored column or the second colored column and is formed in the opening that sandwiches the stacked column forming portion are continuously provided. It is because it becomes easy to make wide the planar view area of the said 1st colored column or the 2nd colored column in the said lamination | stacking column formation site | part by forming.

  In this invention, it is preferable that the position of the said laminated column formation site | part is an area | region pinched | interposed into the opening part in which the colored part of the same color as the 1st colored column is formed. When the position of the layered column forming portion is a region sandwiched between openings where the colored portions of the same color as the first colored columns are formed, the second colored column forming coating is formed when the second colored columns are formed. This is because the working liquid can be suppressed from leveling in the long side direction of the opening from the laminated column forming portion. For this reason, the thickness of the second colored column can be increased, and the height of the stacked column can be increased.

  In the present invention, it is preferable that the width of at least one of the first colored column and the second colored column is 30 μm or more. This is because when the width of at least one of the first colored column and the second colored column is 30 μm or more, the height of the stacked column can be increased.

  In the present invention, it is preferable that 0.51 or more of the stacked pillars are formed per pixel in the display region. This is because 0.51 or more of the stacked pillars are formed for each pixel in the display region, so that the cell gap can be excellent in uniformity.

  INDUSTRIAL APPLICABILITY The present invention can provide a color filter for a horizontal electric field liquid crystal drive system that has a high spacer height, a uniform cell gap when used in a liquid crystal display device, and excellent display quality. There are effects such as.

The present invention relates to a color filter for a lateral electric field liquid crystal drive system.
Hereinafter, the color filter for a horizontal electric field liquid crystal drive system of the present invention will be described in detail.

  The color filter for a lateral electric field liquid crystal driving method of the present invention includes a substrate, a black matrix formed on the substrate and having a rectangular opening having a short side and a long side, red formed on the opening, Three colored layers having three colored portions of green and blue and the color of the colored portion formed in the opening adjacent to the long side direction are the same color, and the opening adjacent to the long side direction The first colored column that is the lowermost colored column, the second colored column that is the colored column of the second layer, and the third colored column that is the uppermost colored column on the layered column forming portion of the black matrix sandwiched between the portions For a horizontal electric field liquid crystal driving method, wherein each of the colored columns includes a laminated column composed of the colored layers of the respective colors, and a transparent protective layer formed so as to cover the black matrix, the colored layer, and the laminated columns. A color filter, the above An aspect (first aspect) in which a planar view area in the laminated column forming part of the first colored column and the second colored pillar is 20% or more of a planar view area of the laminated column forming part, the first colored pillar and the first colored pillar At least one of the two colored pillars is formed in a strip shape on the laminated column forming part and on at least one convex part forming part of the convex forming part adjacent to the short side direction of the opening of the laminated column forming part It can be divided into two modes, the mode (second mode). Hereinafter, the color filter for a horizontal electric field liquid crystal drive system of the present invention will be described separately for each aspect.

1. First Aspect First, the first aspect of the color filter for the lateral electric field liquid crystal driving system of this aspect will be described. The color filter for a horizontal electric field liquid crystal driving method according to this aspect is the above-described color filter for a horizontal electric field liquid crystal driving method, wherein a planar view area of the first colored column and the second colored column in the stacked column forming portion is the stacked column. It is an aspect that is 20% or more of the planar view area of the formation site.

Such a color filter for a horizontal electric field liquid crystal drive system of this embodiment will be described with reference to the drawings. FIG. 1 is a schematic plan view of a color filter for a lateral electric field liquid crystal driving method according to this embodiment. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG. As illustrated in FIGS. 1, 2, and 3, the color filter for a lateral electric field liquid crystal driving method according to this aspect includes a substrate 1 and a rectangular opening formed on the substrate 1 and having a short side and a long side. 2 and a colored portion (4R, 4G, 4B) of three colors of red, green and blue formed in the opening 2 and formed in the opening 2 adjacent in the long side direction. The first colored column 16 and the second colored column are formed on the stacked column forming portion 5 of the black matrix 3 sandwiched by the colored layer having the same color of the colored portion and the opening 2 adjacent in the long side direction. 26 and the third colored column 36 are laminated.
Here, the first colored column 16, the second colored column 26, and the third colored column 36 are respectively composed of colored layers of red, green, and blue. The first colored column 16 and the second colored column 26 are formed in a strip shape on the stacked column forming portion 5 and the convex portion forming portion 7. Further, the first colored column 16 is continuously formed on the red colored portion 4 </ b> R formed in the opening and the laminated column forming portion 5. Furthermore, the planar view area of the first colored column 16 and the second colored column 26 in the stacked column forming portion 5 is 20% or more of the planar view area of the stacked column forming portion 5.
Although not shown, the black matrix 3, the colored layer including the colored portions (4R, 4G, 4B) and the transparent protective layer formed so as to cover the laminated pillar 6 are included.

According to this aspect, when the plan view area of the first colored column and the second colored column at the stacked column forming portion is in the above-described range, the thickness of the second colored column and the third colored column is sufficiently increased. It can be thick. For this reason, the height of the laminated pillar can be increased. Therefore, even when the transparent protective layer is formed, the spacer height, that is, the transparent formed on the laminated column from the surface of the transparent protective layer formed on the colored portion of each color. The thickness up to the surface of the protective layer can be made sufficiently large. As a result, when used in a liquid crystal display device, the cell gap is uniform and the display quality can be improved.
Further, the laminated column forming portion is a region sandwiched between the openings adjacent in the long side direction, so that the first colored column or the second colored column, the first colored column or the second colored column, The colored portion formed in the opening of the same color can be continuously formed. For this reason, the planar view area in the said lamination | stacking column formation site | part of the said 1st coloring column and a 2nd coloring column can be made large.
Here, the reason why the above-described effects are exhibited when the area in plan view of the first colored column and the second colored column in the stacked column forming portion is within the above range is as follows.

That is, in the conventional color filter, as illustrated in FIG. 14, the planar view area in the stacked column forming portion 105 of the first colored column 116 and the second colored column 126 constituting the stacked column 106 is larger than the above range. Narrowly formed.
Here, as a method for forming a laminated column in a conventional color filter, a coating solution for forming a colored layer of each color used for the formation of the colored column is applied on a colored column or a layered column forming site immediately below the color column. Is used. Specifically, as illustrated in FIG. 15, the first colored column 116 whose planar view area is narrower than the above range is formed (FIG. 15A), and then the colored layer forming coating solution for the second color is formed. Is applied to form a coating film 14B of the colored layer forming coating solution (FIG. 15B). Here, as shown in FIG. 15 (b), immediately after the second color layer forming coating solution is applied, the color layer forming layer with a relatively uniform thickness is formed on the color column 116 and the black matrix 103. A coating film 14B of the coating liquid is formed. However, the coating layer 14B of the colored layer forming coating solution on the first colored column 116 is gradually leveled down to a lower position (FIG. 15C). Therefore, the thickness of the second colored column 126 that is finally formed by performing exposure and development is thin (FIG. 15D).
Therefore, as illustrated in FIG. 15E, when the third colored column 136 is formed on the second colored column 126 by the same method and the stacked column 106 is formed, The thickness of the three colored pillars 136 is also thin, and the height of the laminated pillar 106 is low.

  On the other hand, according to the present aspect, the second colored column and the third colored column are formed when the area in plan view of the first colored column and the second colored column in the stacked column forming portion is in the above-described range. In this case, it is possible to suppress the leveling of the second-color and third-color colored layer forming coating liquids used for forming the second colored column and the third colored column. Therefore, the height of the laminated pillar can be increased. For this reason, even when the transparent protective layer is formed, the spacer height can be increased.

  The color filter for a lateral electric field liquid crystal driving system of this embodiment has the above-mentioned laminated pillar, colored layer, black matrix, substrate, and transparent protective layer. Hereinafter, each structure of the color filter for a horizontal electric field liquid crystal drive system of this aspect will be described.

(1) Laminate Column The laminate column used in this aspect includes a first colored column that is a colored column formed in the lowermost layer in the above-described laminated column forming site, a second colored column that is a colored column in the second layer, and an outermost column. A third colored column which is a colored column formed in the upper layer is laminated, and each colored column is composed of a colored layer of each color including a colored portion of each color described later.
Moreover, the planar view area in the said lamination | stacking column formation site | part of the said 1st coloring column and the 2nd coloring column is 20% or more of the planar view area of the said lamination | stacking column formation site | part.
Here, “formed on the layered column forming part” means that the first to third colored columns are formed so as to overlap on the layered column forming part in plan view.

(A) Colored columns Each of the colored columns of the first to third colored columns used in this embodiment is composed of a colored layer of each color described later.
Here, the colored layer of each color is formed by applying a colored layer forming coating solution containing the material constituting the colored layer, and then exposing and developing.
For this reason, when the colored layers of the respective colors are formed in the order of red, green and blue, that is, the first colored layer forming coating solution to be applied first is red and then applied. When the second color layer forming coating solution is green and the third color layer forming coating solution to be applied last is blue, the colors of the first to third colored columns are Red, green and blue respectively.
Therefore, the colors of the first to third colored columns are different from each other, and are determined by the order of formation of the colored layers of the respective colors formed in the openings.

(B) Laminated Column The planar view area of the first colored column and the second colored column in the laminated column forming part may be 20% or more of the planar viewed area of the laminated column forming part, and in particular, 30% It is preferably in the range of ˜70%, particularly preferably in the range of 40% to 60%. It is because the thickness of a 2nd colored column and a 3rd colored column can be made thick enough by being in the said range, and the height of the said laminated column can be made high.

  As the order of size in plan view of the first colored column, the second colored column, and the third colored column constituting the laminated column used in this aspect, the laminated column may have a desired height and a desired strength. Anything is possible. Accordingly, the first colored column <the second colored column <the third colored column may be larger in plan view area, and the third colored column <the second colored column <the first colored column may be larger. However, it is usually formed so that the area in plan view becomes larger in the order of the third colored column <the second colored column <the first colored column.

  As the formation position of the first colored column and the second colored column in this aspect, the area in plan view of the first colored column and the second colored column at the stacked column forming portion is within the above-described range, and the third colored column is formed. What is necessary is just to be able to suppress the leveling of the third color layer-forming coating solution applied when forming the pillar.

As a formation position of such a 1st colored column and a 2nd colored column, the said 1st colored column and a 2nd colored column may be formed only within the said lamination | stacking column formation part.
In addition, as illustrated in FIG. 4, the first colored column 16 is within the range of the stacked column forming part 5, and the second colored column 26 is formed of the stacked column forming part 5 and the stacked column forming part 5. It may be formed in a band shape on one convex portion forming portion 7 adjacent in the short side direction of the opening 2. Further, as illustrated in FIG. 5, the second colored column 26 is within the range of the stacked column forming portion 5, and the first colored column 16 is the stacked column forming portion 5 and the convex portion forming portion on one side. 7 may be formed in a band shape.
Further, as illustrated in FIG. 6, the first colored column 16 and the second colored column 26 are formed in a strip shape on the stacked column forming portion 5 and the convex portion forming portion 7, and on the convex portion forming portion 7. In FIG. 7, the first colored column 16 and the second colored column 26 are stacked on the convex portion forming portion 7, as illustrated in FIG. Also good.
Furthermore, as illustrated in FIGS. 1 to 3 described above, the first colored column 16 and the second colored column 26 are formed on the stacked column forming portion 5 and the convex forming portions 7 on both sides. It may be a thing.
4 to 7 are cross-sectional views in the short side direction of the opening including the stacked pillars, and the reference numerals in FIGS. 4 to 7 are the same as those in FIG. Moreover, being formed in a strip shape on the laminated column forming portion and the convex portion forming portion means that it is integrally formed on the laminated column forming portion and the convex portion forming portion.

In this aspect, in particular, at least one of the first colored column and the second colored column may be formed in a strip shape on the stacked column forming portion and at least on the convex portion forming portion on one side. preferable.
When the first colored column is formed in a strip shape on the laminated column forming site and at least on one convex portion forming site, the second colored column forming coating is formed at the time of forming the second colored column. This is because the working fluid can be suppressed from leveling in the direction of the convex portion forming portion from the laminated column forming portion. For this reason, it is because the thickness of the 2nd coloring pillar can be made thick. Further, since the second colored column is formed in a strip shape on the laminated column forming portion and at least on the convex portion forming portion on one side, the third colored column is colored when the third colored column is formed. This is because the layer-forming coating liquid can be prevented from leveling from the laminated column forming portion toward the convex portion forming portion. For this reason, it is because the thickness of the 3rd coloring pillar can be made thick.
Thus, at least one of the first colored column and the second colored column is formed in a strip shape on the laminated column forming portion and at least on the convex portion forming portion on one side, thereby the laminated column. It is because the height of can be made high.

Further, in this aspect, in particular, the first colored column and the second colored column are formed in a strip shape on the laminated column forming portion and at least on one convex portion forming portion, and are laminated on the convex portion forming portion. It is preferable that
At the time of forming the second colored column and the third colored column, the second color and third color colored layer forming coating liquid is applied from the laminated column forming site to the convex portion forming sites on both sides of the laminated column forming site. This is because leveling in the direction of at least one convex portion forming portion can be more effectively suppressed, and the thickness of the second colored column and the third colored column can be increased.

Furthermore, in this aspect, it is particularly preferable that the first colored column and the second colored column are formed in a band shape on the laminated column forming portion and on the convex portion forming portions on both sides.
At the time of forming the second colored column and the third colored column, the second and third colored colored layer forming coating liquids are directed from the laminated column forming portion toward the convex forming portions on both sides of the laminated column forming portion. This is because the leveling can be suppressed. For this reason, it is because the thickness of a 2nd colored column and a 3rd colored column can be made thicker.

  As the formation position of the third colored column in this aspect, it is sufficient that at least a part is formed in the laminated column forming part, and depending on the use of the color filter for the lateral electric field liquid crystal driving method of this aspect, etc. It is set appropriately.

The first colored column, the second colored column, and the third colored column in the present embodiment have planar shapes as the first colored column, the second colored column, the third colored column, the first colored column, and the second colored column. The column and the third colored column and the colored portion of the same color may be formed continuously, or may be formed discontinuously.
In this aspect, the first colored column or the second colored column is the same color as the first colored column or the second colored column, and the color formed in the opening that sandwiches the stacked column forming portion. The part is preferably formed continuously. This is because it is easy to increase the planar view area of the first colored column or the second colored column in the stacked column forming portion.

Here, the first colored column or the second colored column, and the colored portion that is the same color as the first colored column or the second colored column and is formed in the opening that sandwiches the stacked column forming portion, The continuous formation means that the first colored column 16 and the red colored portion 4R are continuously formed on the stacked column forming portion 5 as shown in FIGS. As shown in FIG. 9 which is a cross-sectional view taken along the line CC of FIGS. 8 and 8, the second colored column 26 and the blue colored portion 4B are continuously formed on the laminated column forming portion 5. Can be mentioned.
8 and 9 are the same as those in FIGS.

Moreover, as a case where the colored column and the colored portion of the same color are formed discontinuously, as illustrated in FIG. 11 which is a cross-sectional view taken along the line DD of FIGS. 10 and 10, The thing which the coloring column 16 and the said red coloring part 4R are not touching on the said lamination | stacking column formation site | part 5 can be mentioned.
10 and 11 are the same as those in FIGS.

The width of each of the first colored column and the second colored column in this aspect is such that when the second colored column and the third colored column are formed, the second and third colored layer forming coating liquids are used for the laminated column. What is necessary is just to be able to suppress leveling from the formation part to the convex part formation part direction.
In the present embodiment, specifically, the thickness is preferably 30 μm or more, particularly preferably in the range of 35 μm to 75 μm, and particularly preferably in the range of 45 μm to 65 μm. When the width of the first colored column is within the above range, the colored layer forming coating liquid of the second color is leveled from the laminated column forming portion toward the convex portion forming portion when the second colored column is formed. This is because this can be suppressed. For this reason, it is because the height of the said laminated pillar can be made into sufficient height.
In addition, since the width of the second colored column is within the above range, when the third colored column is formed, the third color column forming coating liquid is directed from the laminated column forming portion toward the convex portion forming portion. This is because leveling can be suppressed. For this reason, it is because the height of the said laminated pillar can be made into sufficient height.
Moreover, it is because the height of the said laminated pillar can be made high from such a thing.
In addition, each width | variety of the said 1st colored pillar and the 2nd colored pillar means the largest length among the length of the short side direction of the said opening part about each of the said 1st colored pillar and the 2nd colored pillar. That's what it says.

  The width of the third colored column in this aspect may be any width that can maintain a desired cell gap when used in a liquid crystal display device. It is set appropriately according to.

  The position of the laminated column forming portion may be a region sandwiched between openings adjacent in the long side direction. In this embodiment, it is preferable that the region is sandwiched between the openings where the colored portions of the same color as the first colored columns or the second colored columns are formed, and in particular, the colored portions of the same color as the first colored columns. A region sandwiched between the openings to be formed is preferable.

When the third colored column is formed, the colored portion having the same color as the second colored column is formed in the stacked column by being a region sandwiched between the openings where the colored portion of the same color as the second colored column is formed. It is formed in the opening part which pinches | interposes a formation part. For this reason, it is because it can suppress that the coating liquid for colored layer formation of the 3rd color levels from the said lamination | stacking column formation site | part to the long side direction of the said opening part. For this reason, it is because the thickness of the said 3rd coloring column can be made thick and the height of the said lamination | stacking column can be made high.
In addition, when the second colored column is formed, the second colored column forming coating liquid is added to the stacked column by being a region sandwiched between the openings in which the colored portion of the same color as the first colored column is formed. This is because leveling in the long side direction of the opening from the formation site can be suppressed. Further, when the third colored column is formed, the colored portion having the same color as the first colored column is formed in the opening that sandwiches the layered column forming portion. This is because leveling in the long side direction of the opening from the laminated column forming portion can be suppressed. For this reason, it is because the thickness of the said 2nd colored column and the 3rd colored column can be made thick, and the height of the said laminated column can be made higher.

As the height of the laminated pillar, any color filter of the present invention may be used as long as it can have a desired spacer height. Specifically, the height is within a range of 3.5 μm to 6.0 μm. In particular, it is preferably in the range of 3.5 μm to 5.5 μm, and particularly preferably in the range of 4.0 μm to 5.0 μm. This is because the spacer height can be made sufficiently high even when a transparent protective layer described later is formed by being within the above range.
Note that the height of the stacked column means the maximum of the distances from the surface of the colored portion to the top of the stacked column in the vertical direction.

The number of stacked pillars used in this embodiment is not particularly limited as long as it can form a desired cell gap when used in a liquid crystal display device. In this embodiment, it is preferable that 0.51 or more are formed per pixel in the display region, and it is particularly preferable that the number is in the range of 0.55 to 0.77. It is because it can be made excellent in the uniformity of a cell gap by being in the said range.
Here, the display area refers to an area used as a liquid crystal display area when the liquid crystal display device is manufactured. The non-display area refers to an area other than the display area. One pixel means one colored portion formed in the opening.

(2) Colored layer The colored layer used in this embodiment has three colored portions of red, green, and blue formed in openings provided in a black matrix described later. Moreover, the said colored part is arrange | positioned so that the color of the said colored part formed in the said opening part adjacent to a long side direction may become the same color.

  The colored layer of each color in this embodiment is obtained by dispersing or dissolving a colorant such as a pigment or dye of each color in a binder resin, and is formed by a photolithography method.

In this embodiment, examples of the colorant used in the red (R) colored layer include perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, and isoindoline pigments. Can be mentioned. These pigments may be used alone or in combination of two or more.
Examples of the colorant used in the green (G) colored layer include phthalocyanine pigments such as halogen polysubstituted phthalocyanine pigments or halogen polysubstituted copper phthalocyanine pigments, triphenylmethane basic dyes, isoindoline pigments, Examples include isoindolinone pigments. These pigments or dyes may be used alone or in combination of two or more.
Examples of the colorant used in the blue (B) colored layer include copper phthalocyanine pigments, anthraquinone pigments, indanthrene pigments, indophenol pigments, cyanine pigments, dioxazine pigments, and the like. These pigments may be used alone or in combination of two or more.

  As the binder resin used in the colored layer, for example, a photosensitive resin having a reactive vinyl group such as acrylate, methacrylate, polyvinyl cinnamate, or cyclized rubber is used. In this case, a photopolymerization initiator may be added to the photosensitive resin composition for forming a colored part containing a colorant and a photosensitive resin, and further, a sensitizer, a coating property improver, and a development as necessary. You may add an improving agent, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, etc.

  The thickness of the colored layer of each color is usually set to about 1 μm to 5 μm.

(3) Black matrix The black matrix used for this aspect is formed on the board | substrate mentioned later, and is provided with an opening part.

  The shape of the opening in the black matrix used in this aspect is a rectangular shape having a short side and a long side, and may be a rectangular shape or a shape surrounded so as to be in contact with the rectangle. Specifically, as the shape surrounded so as to be in contact with the rectangle, as illustrated in FIGS. 12A and 12B, the opening 2 having a shape having a notch at the corner of the rectangle, or FIG. Examples thereof include an elliptical opening 2 illustrated in c) and a polygonal opening 2 illustrated in FIG.

Examples of the black matrix include those obtained by dispersing or dissolving a black colorant in a binder resin, and metal thin films such as chromium and chromium oxide. This metal thin film may be a CrO _x film (x is an arbitrary number) and a laminate of two Cr films, and a CrO _x film (x is an arbitrary number) with a reduced reflectance. , CrN _y film (y is an arbitrary number) and three layers of Cr film may be laminated. Among them, the black matrix is preferably a black matrix in which a black colorant is dispersed or dissolved in a binder resin in that the black matrix can be made relatively thick.

In the above case, when a printing method or an ink jet method is used as a black matrix formation method, examples of the binder resin include polymethyl methacrylate resin, polyacrylate resin, polycarbonate resin, polyvinyl alcohol resin, polyvinyl pyrrolidone resin, hydroxy Examples thereof include ethyl cellulose resin, carboxymethyl cellulose resin, polyvinyl chloride resin, melamine resin, phenol resin, alkyd resin, epoxy resin, polyurethane resin, polyester resin, maleic acid resin, polyamide resin and the like.
In the above case, when a photolithography method is used as a black matrix formation method, the binder resin may be, for example, an acrylate-based, methacrylate-based, polyvinyl cinnamate-based, or cyclized rubber-based reactive material. A photosensitive resin having a vinyl group is used. In this case, a photopolymerization initiator may be added to the photosensitive resin composition for forming a black matrix containing a black colorant and a photosensitive resin, and further, if necessary, a sensitizer, a coatability improver, A development improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, and the like may be added.

  On the other hand, when the black matrix is a metal thin film, the method for forming the black matrix is not particularly limited as long as the black matrix can be patterned. For example, a photolithography method or a mask is used. The vapor deposition method, the printing method, etc. can be mentioned.

  The thickness of the black matrix is set to about 0.2 μm to 0.4 μm in the case of a metal thin film, and about 0.5 μm to 2 μm in the case where the black colorant is dispersed or dissolved in a binder resin. Is set.

(4) Substrate As the material of the substrate used in this embodiment, those conventionally used for color filters can be used. Examples of such materials include non-flexible transparent inorganic substrates such as quartz glass, Pyrex (registered trademark) glass, and synthetic quartz plates, and flexibility such as transparent resin films and optical resin plates. Examples thereof include a transparent resin substrate. In particular, it is preferable to use an inorganic substrate in this step, and it is preferable to use a glass substrate among inorganic materials. Furthermore, it is preferable to use an alkali-free type glass substrate among the glass substrates. The alkali-free glass substrate is excellent in dimensional stability and workability in high-temperature heat treatment, and contains no alkali component in the glass, so it is suitable for color filters for color liquid crystal display devices using an active matrix method. This is because it can be used.

  The substrate may be a transparent substrate, or may be a reflective substrate or a white colored one. In this embodiment, a transparent substrate is usually used.

(5) Transparent protective layer The transparent protective layer used for this aspect is formed so that the said black matrix, a colored layer, and a lamination pillar may be covered.

As the transparent protective layer forming material used for forming the transparent protective layer used in this embodiment, it is possible to prevent the elution of contaminants from the black matrix, the colored layer and the laminated column to the liquid crystal layer, and the colored layer. What is necessary is just to be able to make the surface excellent in flatness.
As such a transparent protective layer forming material, a material generally used as a transparent protective layer of a color filter can be used. For example, a chemically amplified photosensitive resin based on a crosslinked resin, specifically, a chemically amplified photosensitive resin obtained by adding a crosslinking agent to polyvinylphenol and further adding an acid generator, or a radical component by at least ultraviolet irradiation. A photopolymerization initiator that generates C, an acrylic group of C = C in the molecule, a component that undergoes a polymerization reaction by the generated radical and cures, and a functional group that allows unexposed portions to be dissolved by subsequent development An acrylic negative photosensitive resin containing (for example, a component having an acidic group in the case of development with an alkaline solution) can be mentioned, but an acrylic negative photosensitive resin is usually used.
Among the components having an acrylic group used in the above acrylic negative photosensitive resin, the relatively low molecular weight polyfunctional acrylic molecules include dipentaerythritol hexaacrylate (DPHA), dipentaerythritol pentaacrylate (DPPA), tetra And methyl pentatriacrylate (TMPTA). Moreover, as a high molecular weight polyfunctional acrylic molecule, the polymer etc. which introduce | transduced the acrylic group through the epoxy group to the one part carboxylic acid group part of a styrene-acrylic acid-benzylmethacrylate copolymer are mentioned.

  Further, a positive photosensitive resin using a novolac resin as a base resin can also be used.

  Examples of the method for applying the transparent protective layer forming material include spin coating, casting, dipping, bar coating, blade coating, roll coating, gravure coating, flexographic printing, and spray coating. be able to.

  The thickness of the transparent protective layer is preferably in the range of 0.1 μm to 10 μm, and more preferably in the range of 0.1 μm to 5 μm. This is because, within the above range, it is possible to suppress the elution of contaminants from the black matrix, the colored layer, and the stacked column to the liquid crystal layer. Moreover, it is because the effect of this aspect can fully be exhibited.

2. 2nd aspect 2nd aspect of the color filter for horizontal electric field liquid crystal drive systems of this invention is a color filter for horizontal electric field liquid crystal drive systems mentioned above, Comprising: At least one of the said 1st coloring column and a 2nd coloring column is the above-mentioned. It is an aspect in which a belt is formed in a band shape on the laminated column forming site and on at least one of the convex forming sites adjacent to the short side direction of the opening of the laminated column forming site.

  As such a color filter for a horizontal electric field liquid crystal driving system of this embodiment, those already shown in FIGS.

According to this aspect, at least one of the first colored column and the second colored column is at least one side of the convex portion forming portion adjacent to the laminated column forming portion and in the short side direction of the opening of the laminated column forming portion. The height of the laminated pillar can be increased by being formed in a band shape on the convex forming portion.
For this reason, even when the transparent protective layer is formed, the height of the spacer, that is, the transparent protective layer formed on the stacked pillars from the surface of the transparent protective layer formed on the colored portion of each color. The thickness up to the surface can be made sufficiently large. As a result, when used in the liquid crystal display device, the cell gap is uniform and the display quality can be improved.
Further, the laminated column forming portion is a region sandwiched between the openings adjacent in the long side direction, so that the first colored column or the second colored column, the first colored column or the second colored column, The colored portion formed in the opening of the same color can be continuously formed. For this reason, the planar view area in the said lamination | stacking column formation site | part of the said 1st coloring column and a 2nd coloring column can be made large.

The color filter for a lateral electric field liquid crystal driving system of this embodiment has the above-mentioned laminated pillar, colored layer, black matrix, substrate, and transparent protective layer. Hereinafter, each structure of the color filter for a horizontal electric field liquid crystal drive system of this aspect will be described.
The colored layer, the black matrix, the substrate, and the transparent protective layer used in this embodiment can be the same as those described in the section “1. First embodiment”, and thus the description thereof is omitted here. To do.

The stacked columns used in this embodiment are formed in the first colored column that is the colored column formed in the lowermost layer in the stacked column forming portion, the second colored column that is the colored column in the second layer, and the uppermost layer. A third colored column which is a colored column is laminated, and each colored column is composed of a colored layer of each color including the colored portion of each color.
Further, at least one of the first colored column and the second colored column is formed with a convex portion on at least one side of the convex portion forming portion adjacent to the laminated column forming portion and in the short side direction of the opening of the laminated column forming portion. It is formed in a band shape on the part.

  The laminated column used in this embodiment is formed by laminating the first to third colored columns. Since such colored columns are the same as the contents described in the section “1. First aspect”, description thereof is omitted here.

In this aspect, the first colored column and the second colored column are formed at a position where at least one of the first colored column and the second colored column is in a strip shape on the stacked column forming part and on the convex part forming part on at least one side. Is formed.
In this aspect, when the first colored column is formed in a strip shape on the stacked column forming portion and at least one convex portion forming portion, the second color column is formed at the time of forming the second colored column. It can suppress that the coating liquid for colored layer formation levels from the said lamination | stacking column formation site | part to a convex part formation site | part direction. For this reason, the thickness of the second colored column can be increased. Further, since the second colored column is formed in a strip shape on the laminated column forming portion and at least on the convex portion forming portion on one side, the third colored column is colored when the third colored column is formed. It can suppress that the coating liquid for layer formation levels from the said lamination | stacking column formation site | part to a convex part formation site | part direction. For this reason, the thickness of the third colored column can be increased.
Thus, at least one of the first colored column and the second colored column is formed in a strip shape on the laminated column forming portion and at least on the convex portion forming portion on one side, thereby the laminated column. The height of can be made high.

In this aspect, among these, the first colored column and the second colored column are formed in a strip shape on the laminated column forming portion and at least one convex portion forming portion, and are laminated on the convex portion forming portion. It is preferable.
At the time of forming the second colored column and the third colored column, the second color and third color colored layer forming coating liquid is applied from the laminated column forming site to the convex portion forming sites on both sides of the laminated column forming site. This is because leveling in the direction of at least one convex portion forming portion can be more effectively suppressed, and the thickness of the second colored column and the third colored column can be increased.

Moreover, in this aspect, it is particularly preferable that the first colored column and the second colored column are formed in a strip shape on the laminated column forming site and on the convex forming sites on both sides.
At the time of forming the second colored column and the third colored column, the second and third colored colored layer forming coating liquids are directed from the laminated column forming portion toward the convex forming portions on both sides of the laminated column forming portion. This is because leveling can be suppressed. For this reason, it is because the thickness of a 2nd colored column and a 3rd colored column can be made thicker.

  As the formation position of the third colored column in this aspect, it is sufficient that at least a part is formed in the laminated column forming part, and depending on the use of the color filter for the lateral electric field liquid crystal driving method of this aspect, etc. It is set appropriately.

  The area in plan view of the first colored column and the second colored column in the layered column forming portion in the present embodiment is that the second and third colored layer forming coatings are formed when the second colored column and the third colored column are formed. What is necessary is just to be able to suppress the leveling of the working fluid.

  The order of size in plan view of the first colored column, the second colored column and the third colored column constituting the laminated column used in this aspect, the planar view shape and width, and the position of the laminated column forming part, In addition, the height and the number of the stacked pillars are the same as the contents described in the section “1. First aspect”, and thus the description thereof is omitted here.

3. Color filter for lateral electric field liquid crystal driving system The color filter for lateral electric field liquid crystal driving system of the present invention is sufficient if it has the substrate, black matrix, colored layer, laminated pillar, and transparent protective layer. Depending on the structure, it may have another structure such as an alignment film.

In addition, the spacer height of the color filter for a horizontal electric field liquid crystal driving method of the present invention may be any height as long as it can form a desired cell gap. Specifically, the spacer height is 2.5 μm to 5.0 μm. It is preferable that it is in the range, and in particular, it is preferable to be in the range of 2.5 μm to 4.5 μm, and it is particularly preferable to be in the range of 3.0 μm to 4.0 μm.
The spacer height refers to the thickness from the surface of the transparent protective layer formed on the colored portion of each color to the surface of the transparent protective layer formed on the laminated column in the vertical direction.

4). Manufacturing method of color filter for lateral electric field liquid crystal driving method As a manufacturing method of the color filter for horizontal electric field liquid crystal driving method of the present invention, any method can be used as long as it can form each of the above structures with high accuracy, and a photolithography method is used. Thus, a method of forming a colored layer including the colored portion and the colored column can be used.

  As a method for manufacturing such a color filter, specifically, as shown in FIG. 13, for forming a color filter having a substrate 1 and a black matrix 3 formed on the substrate 1 and having openings 2. A substrate is prepared (FIG. 13A), and first colored columns 16 each including a red colored layer including a red colored portion 4R and a red colored layer are collectively formed (FIG. 13B). At this time, the planar view area of the first colored column 16 on the stacked column forming portion 5 is 20% or more of the planar view area of the stacked column forming portion 5.

  Next, as shown in FIG. 13C, a second colored column 26 including a blue colored layer including the blue colored portion 4B and a blue colored layer is formed in a lump. The area in plan view of the second colored column 26 on the stacked column forming part 5 is 20% or more of the plan view area of the stacked column forming part 5. Further, the second colored column 26 is formed on the first colored column.

  Next, as shown in FIG. 13 (d), a third colored column 36 composed of a green colored layer including the green colored portion 4G and a green colored layer is collectively formed. In this way, the laminated pillar 6 composed of the first to third colored pillars is formed on the laminated pillar forming portion 5. Subsequently, although not shown, a transparent protective layer is formed so as to cover the colored layer and the stacked pillars, and the lateral electric field liquid crystal driving system color filter 10 is formed.

5. Applications The use of the color filter for a lateral electric field liquid crystal drive system of the present invention can be used for a liquid crystal display device, and is particularly suitable for a liquid crystal display device required to have a uniform cell gap and excellent display quality. Used for.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

  Hereinafter, the present invention will be specifically described with reference to examples.

[Example 1]
1. Formation of Black Matrix As a transparent substrate, a glass substrate (Corning 1737 glass) having a size of 300 mm × 400 mm and a thickness of 0.7 mm was prepared. After cleaning this transparent substrate according to a conventional method, a negative photosensitive black resist (CFPR DN-83, manufactured by Tokyo Ohka Kogyo Co., Ltd.) is applied, exposed, developed, and heat-treated through a predetermined mask to obtain vertical stripe lines. A grid-like black matrix pattern having a width of 10 μm, a vertical stripe pitch of 150 μm, a horizontal stripe line width of 75 μm, and a horizontal stripe pitch of 450 μm was formed. Thus, openings having a short side of 150 μm and a long side of 450 μm were formed at intervals of 10 μm in the short side direction and at intervals of 75 μm in the long side direction. The region sandwiched between the openings adjacent to each other in the long side direction was a rectangular region having a length of 75 μm in the long side direction of the opening and a length of 150 μm in the short side direction of the opening.
Moreover, the area | region pinched | interposed into the opening part in which a blue coloring part is formed among the area | regions pinched | interposed into the opening part adjacent to a long side direction was made into the lamination | stacking column formation site | part.

2. Next, negative photosensitive resin composition for red colored layer, negative photosensitive resin composition for blue colored layer, negative photosensitive resin composition for green colored layer A product was prepared.

<Negative photosensitive resin composition for red colored layer>
・ Red pigment (Chromophthal Red A2B manufactured by Ciba Specialty Chemicals)
4.8 parts by weight / yellow pigment (PASFOL Yellow D1819, manufactured by BASF) 1.2 parts by weight / dispersant (Disperbic 161, manufactured by Big Chemie) 3.0 parts by weight / monomer (SR399, manufactured by Sartomer) 4.0 weight Part / Polymer I 5.0 parts by weight / Initiator (Irgacure 907 manufactured by Ciba Specialty Chemicals)
1.4 parts by weight / initiator (2,2′-bis (o-chlorophenyl) -4,5,4 ′, 5′-tetraphenyl-1,2′-biimidazole) 0.6 parts by weight / solvent ( Propylene glycol monomethyl ether acetate) 80.0 parts by weight

<Negative photosensitive resin composition for blue colored layer>
Blue pigment (BASF Heliogen Blue L6700F) 6.0 parts by weight Pigment derivative (Abyssia Solsperse 5000) 0.6 parts by weight Dispersant (Bic Chemie Dispersic 161) 2.4 parts by weight Monomer (SR399, manufactured by Sartomer) 4.0 parts by weight, Polymer I, 5.0 parts by weight, initiator (Irgacure 907, manufactured by Ciba Specialty Chemicals)
1.4 parts by weight / initiator (2,2′-bis (o-chlorophenyl) -4,5,4 ′, 5′-tetraphenyl-1,2′-biimidazole) 0.6 parts by weight / solvent ( Propylene glycol monomethyl ether acetate) 80.0 parts by weight

<Negative photosensitive resin composition for green colored layer>
Green pigment (Avisia Monastral Green 9Y-C) 4.2 parts by weight Yellow pigment (BASF Paliotor Yellow D1819) 1.8 parts by weight Dispersant (Bicchemy Disperbic 161) 3.0 Part by weight / monomer (SR399, manufactured by Sartomer) 4.0 part by weight / Polymer I, 5.0 parts by weight / initiator (Irgacure 907, manufactured by Ciba Specialty Chemicals)
1.4 parts by weight / initiator (2,2′-bis (o-chlorophenyl) -4,5,4 ′, 5′-tetraphenyl-1,2′-biimidazole) 0.6 parts by weight / solvent ( Propylene glycol monomethyl ether acetate) 80.0 parts by weight

The polymer I is based on 100 mol% of a copolymer of benzyl methacrylate: styrene: acrylic acid: 2-hydroxyethyl methacrylate = 15.6: 37.0: 30.5: 16.9 (molar ratio). 2-methacryloyloxyethyl isocyanate was added at 16.9 mol%, and the weight average molecular weight was 42500.
Here, the said weight average molecular weight is calculated | required as a standard polystyrene conversion value by gel permeation chromatography (GPC).

Next, a negative photosensitive resin composition for a red colored layer is applied by a spin coating method so as to cover the black matrix on the transparent substrate, and exposed and developed through a photomask for the red colored layer, A red colored layer was formed. As a plan view shape of the red colored layer, a red vertical stripe line was formed to have a width of 145 μm at a predetermined position of the opening. Further, the red vertical stripe lines were formed so that the red colored portions formed in the openings adjacent in the long side direction were continuous.
Further, red convex portions having a size of 60 μm × 140 μm were formed on the horizontal stripe black matrix pattern on both sides of the red vertical stripe.

Next, a negative photosensitive resin composition for a blue colored layer is applied by a spin coating method so as to cover the black matrix on the transparent substrate, and is exposed and developed through a photomask for the blue colored layer, A blue colored layer was formed. As a plan view shape of this blue colored layer, a blue vertical stripe line was formed at a predetermined position of the opening so as to have a width of 145 μm. Further, the blue vertical stripe lines were formed so that the blue colored portions formed in the openings adjacent in the long side direction were continuous.
Further, blue convex portions having a size of 60 μm × 140 μm were formed on the horizontal stripe black matrix pattern on both sides of the blue vertical stripe.

Next, a negative photosensitive resin composition for a green colored layer is applied by a spin coating method so as to cover the black matrix on the transparent substrate, exposed and developed through a photomask for the green colored layer, A green colored layer was formed. As a plan view shape of the green colored layer, a green vertical stripe was formed at a predetermined position of the opening so as to have a line width of 145 μm. Moreover, the green vertical stripe was formed so that the green coloring part formed in the opening part adjacent to a long side direction might become continuous.
In addition, a dot pattern having a diameter of 35 μm was formed on the blue colored layer on the layered column forming portion.

3. Formation of Transparent Protective Layer Next, the following protective layer composition was applied as a color filter protective layer composition onto the glass substrate on which the colored layer had been formed by a spin coating method.

(Composition of composition for protective layer)
・ Methyl methacrylate-styrene-acrylic acid copolymer: 32 parts by weight ・ Epicoat 180S70 (manufactured by Japan Epoxy Resin Co., Ltd.): 18 parts by weight ・ Dipentaerythritol pentaacrylate: 42 parts by weight ・ Initiator (Ciba Specialty Chemicals) Irgacure 907) ... 8 parts by weight 3-methoxybutyl acetate (referred to as meteace) ... 300 parts by weight

Next, after drying under reduced pressure at a vacuum degree of about 1 × 10 ⁻² Torr and prebaking at 90 ° C., a photomask is placed at a distance of 100 μm from the coating film of the protective layer composition, and the proximity aligner 2 Using an ultra-high pressure mercury lamp of 0.0 kW, the region corresponding to the colored layer forming region including the black matrix layer was irradiated with ultraviolet rays for 10 seconds. Next, it was immersed in a 0.05% aqueous potassium hydroxide solution (liquid temperature: 23 ° C.) for 1 minute and alkali-developed, and only the uncured portion of the coating film was removed to form a transparent protective layer, thereby producing a color filter. .

[Example 2]
A red colored layer was formed in the opening at a predetermined position of the red colored layer so that the red vertical stripe had a line width of 145 μm. Moreover, the red vertical stripe was formed so that the red colored portions formed in the openings adjacent in the long side direction were continuous.
In addition, a red convex portion having a size of 60 μm × 140 μm was formed only on the horizontal stripe black matrix pattern on the blue colored layer side (the side where the blue colored portion is formed) of the red vertical stripe. A color filter was produced in the same manner as in Example 1 except for the above.

[Comparative Example 1]
A red colored stripe was formed in the red colored layer at a predetermined position of the opening so as to have a line width of 145 μm. In addition, red vertical stripes were formed so that the red colored portions formed in the openings adjacent in the long side direction were discontinuous.
In addition, a red dot pattern having a diameter of 20 μm was formed on the layered column forming portion. A color filter was produced in the same manner as in Example 1 except for the above.

[Evaluation]
The height of the columnar column and the spacer height of the color filter produced as described above were measured. As a result, the height of the laminated column and the spacer height in Example 1 were 4.5 μm and 3.5 μm, respectively. Moreover, the height of the laminated pillar of Example 2 and the spacer height were 4.2 μm and 3.2 μm, respectively. On the other hand, the height of the laminated pillar and the spacer height of the comparative example were 3.3 μm and 2.3 μm, respectively. Thus, in the example, it was possible to form a color filter having stacked columns that can have a sufficient spacer height.
In addition, the height of the said laminated column was measured on the basis of the said blue colored part surface. Moreover, the said spacer height was measured on the basis of the said transparent protective layer surface formed on the said blue coloring part.

It is a schematic plan view which shows an example of the color filter of this invention. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is a schematic sectional drawing which shows the other example of the color filter of this invention. It is a schematic sectional drawing which shows the other example of the color filter of this invention. It is a schematic sectional drawing which shows the other example of the color filter of this invention. It is a schematic sectional drawing which shows the other example of the color filter of this invention. It is a schematic plan view which shows the other example of the color filter of this invention. It is CC sectional view taken on the line in FIG. It is a schematic plan view which shows the other example of the color filter of this invention. It is the DD sectional view taken on the line in FIG. It is explanatory drawing explaining the opening part in this invention. It is process drawing which shows an example of the manufacturing method of the color filter of this invention. It is a schematic sectional drawing which shows the other example of the conventional color filter. It is process drawing which shows an example of the manufacturing method of the conventional color filter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,101 ... Board | substrate 2 ... Opening part 3, 103 ... Black matrix 4R, 104R ... Red colored part 4G, 104G ... Green colored part 4B, 104B ... Blue colored part 5, 105 ... Laminated column formation part 6, 106 ... Stacked pillar 7 ... Convex-forming part 10, 100 ... Color filter 16, 116 ... First colored pillar 26, 126 ... Second colored pillar 36, 136 ... Third colored pillar

Claims (8)

A black matrix comprising a substrate and a rectangular opening formed on the substrate and having a short side and a long side;
A three-colored colored layer having three colored portions of red, green and blue formed in the opening, and the colored portions formed in the opening adjacent to each other in the long side direction have the same color ,
A color column that is a lowermost layer on a layered column forming portion of the black matrix that is sandwiched by the openings adjacent to each other in the long side direction in which any one of the three color layers is formed . A first colored column, a second colored column that is the second colored column, and a third colored column that is the uppermost colored column, and each of the colored columns is formed of a colored layer of each color;
A color filter for a lateral electric field liquid crystal driving system having a black matrix, a colored layer, and a transparent protective layer formed so as to cover the stacked columns,
The planar view area of the first colored column and the second colored column in the stacked column forming portion is 20% or more of the planar view area of the stacked column forming portion,
At least one of the first colored column and the second colored column is on the stacked column forming portion and on the protruding portion forming portion on at least one side of the protruding portion forming portion adjacent to the short side of the opening of the stacked column forming portion. A color filter for a lateral electric field liquid crystal driving method, characterized in that the color filter is formed in a band shape. A black matrix comprising a substrate and a rectangular opening formed on the substrate and having a short side and a long side;
A three-colored colored layer having three colored portions of red, green and blue formed in the opening, and the colored portions formed in the opening adjacent to each other in the long side direction have the same color ,
A color column that is a lowermost layer on a layered column forming portion of the black matrix that is sandwiched by the openings adjacent to each other in the long side direction in which any one of the three color layers is formed . A first colored column, a second colored column that is the second colored column, and a third colored column that is the uppermost colored column, and each of the colored columns is formed of a colored layer of each color;
A color filter for a lateral electric field liquid crystal driving system having a black matrix, a colored layer, and a transparent protective layer formed so as to cover the stacked columns,
At least one of the first colored column and the second colored column is on the stacked column forming portion and on the protruding portion forming portion on at least one side of the protruding portion forming portion adjacent to the short side of the opening of the stacked column forming portion. A color filter for a lateral electric field liquid crystal driving method, characterized in that the color filter is formed in a band shape.   The first colored column and the second colored column are formed in a strip shape on the laminated column forming portion and at least on one convex portion forming portion, and are laminated on the convex portion forming portion. The color filter for a horizontal electric field liquid crystal drive system according to claim 2.   The first colored column and the second colored column are formed in a band shape on the stacked column forming portion and on the convex portion forming portions on both sides, and are stacked on the convex forming portions on both sides. The color filter for a horizontal electric field liquid crystal drive system according to claim 3.   The first colored column or the second colored column and the colored portion formed in an opening having the same color as the first colored column or the second colored column and sandwiching the stacked column forming portion are formed as the stacked column. 5. The color filter for a horizontal electric field liquid crystal drive system according to claim 1, wherein the color filter is formed continuously on the portion.   The position of the layered column forming portion is a region sandwiched between openings in which a colored portion having the same color as the first colored column is formed. The color filter for a horizontal electric field liquid crystal drive system described in 1.   The width for at least one of the first colored column and the second colored column is 30 μm or more, and the color for a lateral electric field liquid crystal driving system according to any one of claims 1 to 6 filter.   8. The horizontal electric field liquid crystal driving method according to claim 1, wherein 0.51 or more of the stacked pillars are formed per pixel in the display area. Color filter.

Images