JP5277664B2 - Color filter for horizontal electric field liquid crystal drive system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color filter for in-plane switching system causing large displacement in a minute load region, having a sufficient resistance even for a large local load, and capable of keeping a cell gap constant by using laminated columns as a spacer. <P>SOLUTION: The color filter 1 comprises: a light shielding part 3 provided with a rectangular opening part having short sides and long sides on a substrate 2; colored pixel parts 4R, 4G and 4B of a plurality of colors formed on the openings; colored non-pixel parts 5R, 5G, and 5B of the plurality of colors formed on the light shielding parts; a colored layer whose color is the same as that of the colored pixel part which is adjoining to the long side direction of the opening part; a plurality of laminated columns with two or more layers of colored non-pixel parts of respective colors formed on the light shielding part. Wherein, the thickness of upper most colored non-pixel part among the colored non-pixel parts constituting the laminated column is in the range of 0.4 &mu;m to 2.0 &mu;m. When the width of long side direction of the opening in the laminated column forming region of the lowermost colored non-pixel part is represented by w<SB>1</SB>and the width of long side direction of the opening in the laminated column forming region of the upper most colored non-pixel part is represented by w<SB>z</SB>, the relation of 0.2&lt;w<SB>z</SB>/w<SB>1</SB>&lt;0.6 is satisfied. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a color filter for a lateral electric field liquid crystal driving method having a stacked column in which colored portions of a plurality of colors are stacked as a spacer.

  In general, an operation mode of a liquid crystal display device is a twisted nematic (TN) in which liquid crystal molecules aligned in parallel with a pair of opposed transparent substrates are driven by applying an electric field in a direction perpendicular to the transparent substrate. There are a system, an in-plane switching (IPS) system in which an electric field is applied in a direction parallel to the transparent substrate, and the like. Among such operation modes of the liquid crystal display device, in recent years, the IPS system has been widely used as the operation mode of the liquid crystal display device because of the advantage that the viewing angle is wide when the liquid crystal display is used.

  Generally, a color filter for an IPS system has a light shielding part, a colored layer, a transparent protective layer, and a spacer formed on a substrate. In this color filter for IPS system, a transparent protective layer (also referred to as an overcoat layer) is usually formed on the colored layer in order to flatten the surface of the colored layer and to prevent the elution of contaminants from the colored layer to the liquid crystal layer. .) Is formed.

Conventionally, as a method for forming a spacer, a method in which a large number of spherical or rod-like particles of a certain size made of glass, alumina, plastic, or the like are scattered has been used. However, in the method in which particles are scattered as a spacer, the spacer distribution is uneven. There were various problems such as ease.
As a method for solving the problems of these particulate spacers, a method of forming a photo spacer by photolithography using a photoresist is disclosed.
Further, a method using a stacked column in which colored portions of a plurality of colors are stacked is also disclosed as a spacer (see, for example, Patent Document 1 and Patent Document 2).

Here, the spacer is required to have a property of being easily deformed by a minute load. This is due to the following reason.
For example, when the liquid crystal is placed at a low temperature, all the members constituting the liquid crystal display device try to shrink, and the shrinkage rate of the liquid crystal material is the largest among the constituting members, so that the gap between the substrates shrinks in a narrowing direction. It will be. At this time, if the deformation of the spacer cannot follow the narrowing of the gap, a negative pressure is generated inside the liquid crystal display device, and as a result, vacuum bubbles (low temperature foaming) are easily generated in the liquid crystal display device.
For example, when a liquid crystal display device is used, heat is applied to the liquid crystal display device due to heat generated from the backlight. In this case, all the members constituting the liquid crystal display device try to expand. Even in this case, the expansion coefficient of the liquid crystal material is the largest among the constituting members, so that the gap between the substrates expands. It will be. At this time, similarly to the above, when the deformation of the spacer cannot follow the spread of the gap, pressure is generated inside the liquid crystal cell, and as a result, a gap is formed between the substrate and the liquid crystal layer. This is because the liquid crystal material overflows from the gap, and the overflowed liquid crystal material flows down from the liquid crystal cell due to gravity, resulting in unevenness (gravity unevenness).

In recent years, liquid crystal display devices have increased in screen size, and especially in liquid crystal display devices applied to liquid crystal televisions, the trend toward larger screens has become stronger, and there is a need to maintain a uniform cell gap over the entire area of a wide substrate. It's getting higher.
In recent years, in order to simplify the manufacturing process of liquid crystal display devices and improve productivity, a method of performing cell pressure bonding at room temperature has been proposed. Among them, the one drop fill (ODF) method has become the mainstream. Becoming. The ODF method is a method in which a predetermined amount of liquid crystal is dropped on a liquid crystal panel substrate such as a color filter or a counter substrate, and the other liquid crystal panel substrate is opposed and maintained in a state where a predetermined cell gap can be maintained under vacuum. is there. In the case of such a cell pressure bonding method (particularly the ODF method), a spacer capable of forming a uniform cell gap without causing plastic deformation at the time of cell pressure bonding is required.

  On the other hand, the spacer is also required to have a small displacement after applying a strong force and then removing the force. This is because when a load is locally applied to the liquid crystal cell, for example, in a pressure resistance test such as a finger press test, if the amount of displacement after the force is removed is large, a display defect may occur. Because there is.

Since the above two characteristics, which are easily deformed with respect to a minute load and the characteristics that are difficult to deform with respect to a local load, are contradictory, it is difficult to form a spacer having the respective characteristics. Therefore, it has been difficult to form a liquid crystal display device that is largely deformed with respect to a minute load and has a small amount of displacement with respect to a strong force.
In particular, in the case of the photo spacer, the shape generally changes continuously in the thickness direction of the photo spacer, and since the shape that can be formed is limited, the deformation characteristics obtained are also limited, It was difficult to achieve both of the above two characteristics.

In recent years, it has been proposed to provide two types of photo spacers having different heights in order to achieve both of the above two characteristics.
However, in the production of the color filter for the IPS system, when each of the transparent protective layer and the two types of photo spacers having different heights is formed, the number of processes increases, which causes problems in terms of production efficiency and cost.
In addition, the difference in height between the photo spacer with a high height and the photo spacer with a low height needs to be set to about 0.2 μm to 0.4 μm in order to achieve both of the above two characteristics. Therefore, there is a problem that it is difficult to maintain the in-plane uniformity of the photo spacer.
Furthermore, although it has been proposed to provide two types of stacked columns having different heights in the above-described stacked columns (see, for example, Patent Document 2), even in this case, it is necessary to set the height difference within the above range. And it is difficult to maintain in-plane uniformity.

Japanese Patent Laid-Open No. 5-196946 JP 2006-23733 A

  Since the shape of the stacked pillar can be easily changed as compared with the photo spacer, it is considered that desired deformation characteristics can be obtained. However, although a proposal has been made regarding the relationship between the provision of stacked columns having different heights and load characteristics (see, for example, Patent Document 2), there has been little proposed regarding the relationship between the shape of the stacked columns and the deformation characteristics. is the current situation.

  The present invention has been made in view of the above circumstances, uses a laminated column as a spacer, has a large amount of displacement in a minute load region, and has sufficient resistance against a local load. The main object of the present invention is to provide a color filter for a lateral electric field liquid crystal drive system that can keep the cell gap constant.

In order to achieve the above object, the present invention is formed on a substrate, a light-shielding portion formed in a pattern on the substrate and having a rectangular opening having a short side and a long side, and the opening. A plurality of color pixel colored portions, and a plurality of non-pixel colored portions of the same color as the pixel colored portions formed on the light shielding portion, adjacent to the long side direction of the opening A colored layer in which the color of the pixel portion coloring portion is the same color, a plurality of stacked pillars formed on the light shielding portion in the display region, wherein two or more non-pixel portion coloring portions of each color are stacked, and A color filter for a lateral electric field liquid crystal driving method having a colored layer and a transparent protective layer formed so as to cover the laminated pillar, wherein the laminated pillar is sandwiched between the openings adjacent in the long side direction. Coloration of the non-pixel portion formed in the formation region and constituting the stacked pillar The thickness of the non-pixel portion coloring portion in the uppermost layer is within a range of 0.4 μm to 2.0 μm, and the non-pixel portion in the lowermost layer among the non-pixel portion coloring portions constituting the stacked pillars The width in the long side direction of the opening in the laminated column forming region of the colored portion is w ₁ , and the laminated layer of the non-pixel portion colored portion in the uppermost layer among the non-pixel portion colored portions constituting the laminated column. A lateral electric field liquid crystal driving system color characterized by satisfying the relationship of 0.2 <w _z / w ₁ <0.6, where w _z is the width in the long side direction of the opening in the column forming region Provide a filter.

  In the present invention, it can be said that the thickness of the uppermost non-pixel portion colored portion in the non-pixel portion colored portion constituting the stacked pillar is within a predetermined range and is relatively thick. In addition, regarding the width in the long side direction of the opening in the stacked column forming region, the top non-pixel portion colored portion with respect to the width of the bottom non-pixel portion colored portion among the non-pixel portion colored portions constituting the stacked column It can be said that the width ratio of the uppermost non-pixel portion colored portion is relatively narrow and the lowermost non-pixel portion colored portion is relatively wide. Accordingly, when the color filter for the lateral electric field liquid crystal driving method of the present invention is used in a liquid crystal display device, the load is supported by the non-pixel portion coloring portion of the uppermost layer, and the deformation of the laminated column is more likely to occur. can do. Thereby, for example, it is possible to suppress the occurrence of uneven gravity, low-temperature foaming, and the like. On the other hand, when a large load is applied to the liquid crystal display device, the non-pixel portion colored portion in the lowermost layer also supports the applied load, so that the stacked columns have a large resistance against the load. Have. Therefore, when used in a liquid crystal display device, a color filter for a lateral electric field liquid crystal drive system that can have sufficient resistance to a local load and can have a constant cell gap. Is possible.

  In the above invention, a plurality of second stacked columns formed on the light-shielding portion in the display area and having a height lower than the stacked columns, and in which two or more non-pixel colored portions of each color are stacked. Further, the difference between the spacer height of the portion where the stacked pillar is formed and the spacer height of the portion where the second stacked pillar is formed is 0.5 μm or more, It is preferable that the number density of the stacked columns is in a range of 40% to 80% of the total number density of the stacked columns and the second stacked columns. According to the present invention, the laminated column can have a deformation characteristic that the deformation amount under a low load condition is large and the deformation amount under a high load condition is small. Therefore, when forming the second laminated column having a height lower than that of the laminated column, unlike the conventional case, the height of the second laminated column is made relatively low as in the above range, The number density can be made relatively large as in the above range.

  Further, in the present invention, the number of the non-pixel portion coloring portions constituting the laminated pillar is three or more, and the top non-pixel of the non-pixel portion coloring portions constituting the laminated pillar is It is preferable that the two or more non-pixel part coloring parts other than the part coloring part are continuously formed with the pixel part coloring part of the same color as the non-pixel part coloring part. By forming the non-pixel portion coloring portion continuously with the pixel portion coloring portion, the planar view area in the laminated column forming region of the non-pixel portion coloring portion can be made relatively wide. If the area in plan view of the non-pixel portion coloring portion in the stacked column forming region is relatively large, the thickness of the other non-pixel portion coloring portion stacked on the non-pixel portion coloring portion can be relatively increased. Thereby, the height of the laminated pillar can be made relatively high. For this reason, even if the transparent protective layer is formed so as to cover the stacked columns, the spacer height can be made sufficiently large. Accordingly, when the color filter for the lateral electric field liquid crystal driving method of the present invention is used in a liquid crystal display device, the cell gap is uniform and the display quality can be improved.

  In the present invention, the amount of displacement in the microload region is large, the occurrence of uneven gravity and low-temperature foaming is suppressed, it has sufficient resistance against local loads, and the cell gap is kept constant. There is an effect that it can be maintained.

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 is formed on a substrate, a light shielding portion formed in a pattern on the substrate, and having a rectangular opening having a short side and a long side, and the opening. A plurality of color pixel portion coloring portions, and a plurality of non-pixel portion coloring portions of the same color as the plurality of color pixel portion coloring portions, which are formed on the light shielding portion, in the long side direction of the opening portion. A plurality of stacked columns in which two or more non-pixel colored portions of each color are stacked, and a colored layer in which the colors of adjacent pixel colored portions are the same color; A color filter for a lateral electric field liquid crystal driving system having the colored layer and a transparent protective layer formed so as to cover the laminated pillar, wherein the laminated pillar is sandwiched between the openings adjacent in the long side direction. The non-layers formed in the column forming region and constituting the stacked columns Among the element colored portions, the thickness of the non-pixel portion colored portion in the uppermost layer is within a range of 0.4 μm to 2.0 μm, and among the non-pixel portion colored portions constituting the stacked pillar, The width of the long side direction of the opening in the laminated column forming region of the non-pixel colored portion is w ₁ , and the non-pixel colored portion of the uppermost layer among the non-pixel colored portions constituting the laminated column When the width in the long side direction of the opening in the laminated column forming region of the portion is w _z , the relationship of 0.2 <w _z / w ₁ <0.6 is satisfied. .

  The color filter for a lateral electric field liquid crystal drive system of the present invention will be described with reference to the drawings. FIG. 1 is a schematic plan view showing an example of a color filter for a lateral electric field liquid crystal drive system of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. is there. In FIG. 1, the transparent protective layer is omitted.

  The color filter 1 for a horizontal electric field liquid crystal driving system illustrated in FIGS. 1 to 3 includes a substrate 2 and a light-shielding unit 3 that is formed on the substrate 2 and includes a rectangular opening 12 having a short side and a long side, The three-color pixel portion coloring portions (4R, 4G, 4B) formed in the opening 12 and the three-color non-pixel portion coloring portions of red, green, and blue formed on the light-shielding portion 3 (5R, 5G, 5B) and the colored portion (4R, 4G, 4B) adjacent to the long side direction m of the opening portion 12 is formed on the light shielding portion 3 and the colored layer having the same color. A laminated column 6 in which non-pixel colored portions (5R, 5G, 5B) of three colors of red, green and blue are laminated, and a transparent protective layer 7 formed so as to cover the colored layer and the laminated columns. doing. Further, the stacked pillar 6 is formed in a stacked pillar forming region 13 sandwiched between the openings 12 adjacent in the long side direction m.

In addition, among the non-pixel portion colored portions constituting the stacked pillar 6, the thickness (t) of the green non-pixel portion colored portion 5 </ b> G of the uppermost layer (third layer) is within a predetermined range, and the non-pixel portions constituting the stacked pillar 6 are not formed. Among the pixel portion coloring portions, the uppermost layer (third layer) with respect to the width (w ₁ ) in the long side direction m of the opening in the stacked columnar formation region 13 of the red non-pixel portion coloring portion 5R of the lowermost layer (first layer) The ratio (w _z / w ₁ ) of the width (w _z ) in the long-side direction m of the opening in the stacked columnar formation region 13 of the green non-pixel colored portion 5G) is within a predetermined range.

  In the liquid crystal display device using the color filter for the lateral electric field liquid crystal driving system of the present invention as exemplified in FIGS. 1 to 3, when a minute load is applied, the transparent protective layer 7 on the laminated pillar 6 and the laminated A load is applied to the green non-pixel part coloring part 5G of the uppermost layer (third layer) among the non-pixel part coloring parts constituting the pillar 6. Here, in the present invention, the thickness of the non-pixel portion colored portion in the uppermost layer is within a predetermined range and can be said to be relatively thick. Further, the width in the long side direction of the opening in the stacked column forming region of the uppermost non-pixel part coloring portion with respect to the width in the long side direction of the opening in the layered column forming region of the lowermost non-pixel colored portion The ratio is within a predetermined range, and generally the width of the light-shielding portion where the stacked pillar is formed is within the predetermined range, so the long side of the opening in the stacked column forming region of the non-pixel portion colored portion at the bottom layer The width in the direction is naturally within a predetermined range, and it can be said that the width in the long side direction of the opening in the stacked column forming region of the non-pixel portion colored portion in the uppermost layer is relatively narrow. That is, it can be said that the planar view area of the non-pixel colored portion in the uppermost layer is relatively small. Accordingly, the thickness of the uppermost non-pixel portion colored portion is within a predetermined range, and the uppermost non-pixel portion with respect to the width in the long side direction of the opening in the stacked column forming region of the lowermost non-pixel portion colored portion When the ratio of the width in the long side direction of the opening in the laminated column forming region of the colored portion is within a predetermined range, the resistance against the load can be reduced. Therefore, when a minute load is applied, the uppermost green non-pixel portion colored portion 5G is easily deformed, and the amount of displacement of the liquid crystal display device can be increased.

  Further, a transparent protective layer 7 is formed so as to cover the laminated pillar 6. As a method for forming this transparent protective layer, a method of applying a photosensitive resin composition for a transparent protective layer is generally used. At the time of forming the transparent protective layer, when the photosensitive resin composition for the transparent protective layer is applied on the substrate on which the light shielding portion, the colored layer, and the laminated pillar are formed, the photosensitive resin composition for the transparent protective layer is Leveling flows down from the top onto the pixel portion coloring portion. Therefore, the upper bottom area of the transparent protective layer 7 where the stacked pillar 6 is formed can be made smaller than the planar view area of the green non-pixel portion colored portion 5G of the uppermost layer constituting the stacked pillar 6. . As a result, when a minute load is applied, the resistance against the load can be further reduced, and deformation of the portion where the laminated pillar 6 is formed can be easily generated.

  On the other hand, in the liquid crystal display device, when a large load is applied, the load is the uppermost layer (three layers) among the transparent protective layer 7 on the stacked pillar 6 and the non-pixel portion colored portion constituting the stacked pillar 6. Eye) green non-pixel portion coloring portion 5G, second-layer blue non-pixel portion coloring portion 5B, and lowermost layer (first layer) red non-pixel portion coloring portion 5R. Therefore, the load applied to the liquid crystal display device is dispersed. Here, in the present invention, the opening in the laminated column forming region of the uppermost non-pixel portion coloring portion with respect to the width in the long side direction of the opening in the laminated column forming region of the lowermost non-pixel portion coloring portion. The ratio of the width in the long side direction is within a predetermined range, and generally the width of the light shielding portion where the stacked column is formed is within the predetermined range, so in the stacked column forming region of the lowermost non-pixel portion colored portion The width in the long side direction of the opening is naturally within a predetermined range, and the width in the long side direction of the opening in the stacked column forming region of the colored portion in the uppermost layer is relatively narrow, and the non-pixel in the lowermost layer It can be said that the width in the long side direction of the opening in the laminated column forming region of the partially colored portion is relatively wide. That is, it can be said that the planar view area of the uppermost non-pixel portion colored portion is relatively small and the planar view area of the lowermost non-pixel portion colored portion is relatively large. Thus, since the planar view area of the lowermost non-pixel portion coloring portion is relatively large, the liquid crystal display device below the height (thickness) of the lowermost (first layer) red non-pixel portion coloring portion 5R. The displacement of the liquid crystal display device is less likely to occur.

  Therefore, by using the color filter for the lateral electric field liquid crystal driving system of the present invention, it is possible to eliminate low-temperature foaming and gravity unevenness, and even when a local load is applied, the deformation It is possible to obtain a high-quality liquid crystal display device that does not have the above.

  Further, when the liquid crystal display device is manufactured by the cell pressure bonding method, particularly the ODF method, using the color filter for the lateral electric field liquid crystal driving method of the present invention, the portion where the laminated pillar is formed is under a low load condition. Since the amount of deformation is large, it is possible to make the load uniform over the entire substrate by relaxing or absorbing the pressure unevenness during cell pressure bonding and to prevent the occurrence of gap unevenness. In addition, the cell gap can be maintained even after release after the compressive load.

  Furthermore, even when the liquid crystal display device has a large area, the portion where the stacked pillars are formed has a large amount of deformation under low load conditions, so that the cell gap can be kept uniform. Therefore, the color filter for a horizontal electric field liquid crystal drive system of the present invention can be suitably used for a liquid crystal television.

  Further, when the width in the long side direction of the opening in the stacked column forming region of the non-pixel portion coloring portion of the uppermost layer constituting the stacked column is relatively narrow and the area in plan view is relatively small, for example, the stacked column is covered. Thus, when the polyimide film is formed and the alignment film is formed by rubbing the polyimide film, the non-pixel portion coloring portion in the uppermost layer may be peeled off during the rubbing treatment. On the other hand, in the present invention, since the transparent protective layer is formed so as to cover the stacked pillars, it is possible to suppress peeling of the non-pixel portion coloring portion of the uppermost layer due to rubbing treatment or the like.

  Furthermore, since the laminated pillar is formed on the light shielding portion, it is possible to prevent display quality from being deteriorated due to the formation of the laminated pillar. Accordingly, when the color filter for a lateral electric field liquid crystal driving system of the present invention is used in a liquid crystal display device, the luminance of the colored layer is hardly reduced.

  Since the laminated pillar in the present invention is formed by laminating two or more non-pixel portion colored portions, the laminated pillar can be formed simultaneously with the formation of the colored layer. Therefore, it is not necessary to separately perform a layered column forming step in order to form a layered column, and the spacer can be formed by a simple process. Therefore, cost reduction of the color filter for the horizontal electric field liquid crystal driving method can be achieved.

  In addition, the color filter for a lateral electric field liquid crystal driving method according to the present invention is formed on the light-shielding portion in the display area, is lower in height than the above-described laminated pillar, and two or more non-pixel colored portions of each color are laminated. You may have further some 2nd lamination pillar.

4 is a schematic cross-sectional view showing another example of a color filter for a lateral electric field liquid crystal driving system of the present invention, FIG. 5 is a cross-sectional view taken along the line CC in FIG. 4, and FIG. 3 is a cross-sectional view taken along the line DD in FIG. 6 and 6 are cross-sectional views taken along line EE in FIG. In FIG. 4, the transparent protective layer is omitted.
A color filter 1 for a horizontal electric field liquid crystal driving method exemplified in FIGS. 3 and 4 to 6 is a light shielding portion including a substrate 2 and a rectangular opening 12 formed on the substrate 2 and having a short side and a long side. 3 and the pixel portions coloring portions (4R, 4G, 4B) of three colors of red, green and blue formed in the opening 12 and the non-pixels of three colors of red, green and blue formed on the light shielding portion 3 A colored layer having a colored portion (5R, 5G, 5B) and a color of the colored portion (4R, 4G, 4B) adjacent to the long side direction m of the opening 12 being the same color; Formed on the light-shielding portion 3 and having a height higher than that of the stacked column 6. The non-pixel portion colored portions (5R, 5G, 5B) of three colors of red, green, and blue are stacked. A second stacked column 8 in which non-pixel colored portions (5R, 5G, 5B) of three colors of red, green and blue are stacked; And a transparent protective layer 7 formed to cover the pillars and second laminated pillars. The stacked pillar 6 is formed in a stacked pillar forming region 13 sandwiched between the openings 12 adjacent in the long side direction m. Further, the spacer height h <b> 2 at the portion where the second stacked pillar 8 is formed is lower than the spacer height h <b> 1 at the portion where the stacked pillar 6 is formed.

Conventionally, when two types of spacers with different heights are formed, a high spacer with a high height has a large deformation amount under low load conditions, and a low spacer with a low height under high load conditions. The amount of deformation at is small and has deformation characteristics. In order to make these characteristics compatible, the difference in height between the high spacer and the low spacer and the number density of the high spacer and the low spacer tend to be limited. Specifically, the height of the high spacer and the low spacer The difference was relatively small and was set so that the number density of high spacers was less than the number density of low spacers.
On the other hand, in the present invention, as described above, the laminated column can have a deformation characteristic that the deformation amount under a low load condition is large and the deformation amount under a high load condition is small. That is, the laminated pillar in the present invention can have the characteristics required for the conventional two types of spacers having different heights. Therefore, in the case of forming the second stacked column having a height lower than that of the above described stacked column, the height of the second stacked column is lowered and the number density of the stacked columns is set to It is possible to increase the number density of the two stacked pillars. Thus, since the height of the second stacked pillar can be designed to be relatively low, production stability can be increased.

  The “pixel portion coloring portion” is formed in the opening portion of the light shielding portion on the substrate, and refers to the portion of the coloring portion arranged in the opening portion of the light shielding portion on the substrate. Further, the “non-pixel portion coloring portion” is a portion of the coloring portion that is formed on the light shielding portion and is disposed on the light shielding portion. The colors of the plurality of pixel portion coloring portions and the plurality of non-pixel portion coloring portions are the same color.

  In addition, “the color of the pixel portion coloring portion adjacent in the long side direction of the opening is the same color” means that the pixel portion coloring portion of the same color is adjacent in the long side direction of the opening. This means that the different colored pixel portions are arranged so as to be adjacent to each other in the short side direction. For example, in FIG. 1, in the long side direction m of the opening, each pixel portion is arranged such that the red pixel portion coloring portion 4R is adjacent, the green pixel portion coloring portion 4G is adjacent, and the blue pixel portion coloring portion 4B is adjacent. Colored parts are arranged. Further, the red pixel portion coloring portion 4R and the blue pixel portion coloring portion 4B are adjacent to each other in the short side direction n of the opening, and the blue pixel portion coloring portion 4B and the green pixel portion coloring portion 4G are adjacent to each other. Each pixel portion coloring portion is repeatedly arranged in the order of red, blue, and green so that the portion coloring portion 4G and the red pixel portion coloring portion 4R are adjacent to each other.

  As shown in FIG. 1, the “display region” is formed between the pixel portion coloring portions (4R, 4G, 4B) formed in the opening 12 and these pixel portion coloring portions (4R, 4G, 4B). An area defined by the light-shielding part 3 (inter-pixel light-shielding part). It is assumed that a region provided with a light shielding portion (frame light shielding portion) formed so as to surround the outer periphery of the colored layer in which the pixel portion colored portions (4R, 4G, 4B) are arranged is not a display region. In the present invention, the stacked pillars are formed on the light shielding portion in the display area, that is, on the inter-pixel light shielding portion.

The “stacked column forming region” is a region sandwiched between openings adjacent in the long side direction, and is a region where a stacked column is formed. The “region sandwiched between openings adjacent in the long side direction” refers to a region sandwiched only by the openings adjacent in the long side direction and adjacent to the short sides of the openings. For example, in FIG. 1, the stacked column forming region 13 is a region that is sandwiched only by the opening 12 adjacent to the long side direction m and is adjacent to the short side of the opening 12, and the region where the stacked column 6 is formed. Become.
In addition, “the laminated pillar is formed in the laminated pillar forming region” means that the non-pixel portion coloring portions constituting the laminated pillar are formed so as to overlap in the laminated pillar forming region in plan view. Say.

  In addition, "the thickness of the non-pixel portion coloring portion of the uppermost layer among the non-pixel portion coloring portions constituting the laminated pillar" means the non-pixel portion coloring of the uppermost layer among the non-pixel portion coloring portions constituting the laminated pillar. This is the thickness of the portion, and is the maximum thickness among the thicknesses of the non-pixel portion colored portion in the uppermost layer. For example, in FIG. 3, the thickness of the uppermost non-pixel portion colored portion is t.

“The width in the long side direction of the opening in the laminated column forming region of the non-pixel colored portion of the lowermost layer among the non-pixel colored portions constituting the laminated column” means the non-pixel colored portion constituting the laminated column Among the portions, the lowermost non-pixel portion coloring portion is the width in the stacked columnar formation region when viewed from right above the substrate, and the width in the long side direction of the opening. For example, in FIGS. 1 to 6, the width in the long side direction m of the opening in the stacked columnar formation region 13 of the non-pixel colored portion (5R) in the lowermost layer is w ₁ . For example, in FIGS. 7 to 9, the width in the long side direction m of the opening in the stacked columnar formation region 13 of the non-pixel portion coloring portion (5R) in the lowermost layer is w ₁ , and the long side direction of the opening It becomes equal to the width of the light shielding portion 3 of m. 8 is a cross-sectional view taken along line FF in FIG. 7, and FIG. 9 is a cross-sectional view taken along line GG in FIG.
As described above, in the present invention, among the non-pixel portion colored portions constituting the stacked pillar, the width in the long side direction of the opening in the stacked column forming region of the lowermost non-pixel colored portion is the width of the opening. The width may be equal to the width of the light shielding portion in the long side direction.
In addition, “the width in the long side direction of the opening in the stacked column forming region of the non-pixel portion colored portion of the uppermost layer among the non-pixel portion colored portions forming the stacked column” means the non-pixels forming the stacked column Among the partial coloring portions, the width in the laminated column forming region when the uppermost non-pixel portion coloring portion is viewed from right above the substrate, that is, the width in the long side direction of the opening. For example, in FIGS. 1 to 9, the width in the long side direction m of the opening in the stacked columnar formation region 13 of the uppermost non-pixel portion colored portion (5G) is w _z .

  “A planar view area of the non-pixel portion colored portion constituting the stacked column” means an area when each non-pixel portion colored portion forming the stacked column is viewed from right above the substrate.

The “height of the stacked column or the second stacked column” refers to the longest distance among the distances from the surface of the light shielding portion to the top of the stacked column or the second stacked column in the vertical direction. For example, in FIGS. 1 to 9, the height of the stacked pillar 6 is d1. For example, in FIGS. 4 to 6, the height of the second stacked pillar 8 is d2.
Further, “the spacer height of the portion where the stacked column or the second stacked column is formed” is formed on the stacked column vertically from the surface of the transparent protective layer formed on the colored portion of the pixel portion. The longest distance among the distances to the top of the transparent protective layer. For example, in FIGS. 1-9, the spacer height of the site | part in which the laminated pillar 6 is formed is h1. For example, in FIGS. 4 to 6, the spacer height of the portion where the second stacked pillar 8 is formed is h2.

  Hereinafter, each structure of the color filter for a horizontal electric field liquid crystal drive system of the present invention will be described.

1. Stacked Column A plurality of stacked columns in the present invention are formed on the light shielding portion in the display region, and two or more non-pixel colored portions of each color are stacked.

  Among the non-pixel portion colored portions constituting the stacked pillar, the thickness of the uppermost non-pixel portion colored portion is in the range of 0.4 μm to 2.0 μm, preferably in the range of 0.5 μm to 1.5 μm. More preferably, it is in the range of 0.5 μm to 1.0 μm. It is considered that the amount of deformation under a low load condition can be increased as the thickness of the colored portion of the uppermost non-pixel portion increases. However, if the thickness of the colored portion of the uppermost non-pixel portion is thick, the thickness of the colored portion of the pixel portion constituting the colored layer also increases. It is determined according to the thickness of the pixel portion coloring portion to be formed. In addition, the pixel portion colored portion constituting the colored layer is formed by applying the photosensitive resin composition for each colored portion, exposing and developing, and therefore, by the leveling action of the photosensitive resin composition for the colored portion, The thickness of the non-pixel portion colored portion in the uppermost layer tends to be thinner than the thickness of the pixel portion colored portion constituting the colored layer. For this reason, the upper limit of the thickness of the uppermost non-pixel portion colored portion tends to be thinner than the upper limit of the thickness of the pixel portion colored portion constituting the colored layer. Therefore, the upper limit of the thickness of the non-pixel colored portion in the uppermost layer is about the above value. In addition, if the thickness of the uppermost non-pixel portion colored portion is larger than the above range, it may be difficult to form the uppermost non-pixel portion colored portion simultaneously with the pixel portion colored portion constituting the colored layer. It can be said. Furthermore, when the thickness of the colored portion of the uppermost non-pixel portion is too thick, for example, when a rubbing process is performed at the time of forming the alignment film, even if a transparent protective layer is formed on the stacked pillar, There is a possibility that the colored portion may be peeled off. On the other hand, if the thickness of the non-pixel colored portion in the uppermost layer is thinner than the above range, it may be difficult to increase the amount of deformation under low load conditions.

Further, among the non-pixel portion coloring portions constituting the stacked pillar, the width in the long side direction of the opening in the stacked column forming region of the lowermost non-pixel portion coloring portion is w ₁ , and the uppermost non-pixel portion coloring portion The relationship of 0.2 <w _z / w ₁ <0.6 is established, where w _z is the width in the long side direction of the opening in the stacked columnar formation region. Generally, the width or the like of the light-shielding portion where the stacked pillar is formed is within a predetermined range, and the width in the long side direction of the opening in the stacked pillar forming region of the non-pixel portion colored portion in the lowermost layer is the length of the opening. Since it is designed to be equal to or smaller than the width of the light shielding portion in the side direction, the width in the long side direction of the opening in the stacked column forming region of the non-pixel portion coloring portion in the lowermost layer is naturally within a predetermined range. Limited. For this reason, when the width ratio is large, the width in the long side direction of the opening in the stacked column forming region of the non-pixel portion coloring portion of the uppermost layer is relatively wide. It can be said that the width in the long side direction of the opening in the laminated column forming region of the upper non-pixel colored portion is relatively narrow. Therefore, when the ratio of the width is larger than the above range, the width in the long side direction of the opening in the stacked column forming region of the non-pixel colored portion in the uppermost layer is relatively wide, and the load is low. In some cases, it may be difficult to increase the amount of deformation at. On the other hand, when the ratio of the width is smaller than the above range, the width in the long side direction of the opening in the stacked column forming region of the non-pixel colored portion in the uppermost layer is relatively narrow, and patterning is difficult. There is a case.

The width w _{1 in} the long side direction of the opening in the stacked columnar formation region of the non-pixel portion coloring portion in the lowermost layer is not limited as long as it satisfies the above-mentioned ratio of widths, and specifically, is about 60 μm to 120 μm. be able to.
In addition, the width w _{z in} the long side direction of the opening in the stacked column forming region of the non-pixel colored portion in the uppermost layer only needs to satisfy the above-described width ratio, but specifically, 10 μm to 60 μm. Can be about.

The width in the long side direction of the opening in the laminated column forming region of the non-pixel colored portion other than the lowermost layer and the non-pixel colored portion other than the uppermost layer is the long side of the opening in the laminated column forming region of the non-pixel colored portion of the uppermost layer. It is preferably wider than the width in the direction. This is because it becomes easy to stack the non-pixel portion colored portion of the uppermost layer on the non-pixel portion colored portion other than the lowermost layer and the uppermost layer.
In addition, the width in the long side direction of the opening in the stacked column forming region of the non-pixel colored portion other than the lowermost layer is different from that of the opening in the stacked column forming region of the non-pixel colored portion in the lowermost layer. It is preferably narrower than the width in the long side direction. This is because it is easy to stack the non-pixel portion coloring portions other than the lowermost layer and the uppermost layer on the lowermost non-pixel portion coloring portion.

  Of the non-pixel portion colored portions other than the lowermost layer and the uppermost layer, the width in the long side direction of the opening in the lower layered column forming region and the width in the longer side direction of the opening in the upper layered column forming region May be equal or different, but in particular, the width in the long side direction of the opening in the lower layered column forming region is wider than the width in the long side direction of the opening in the upper layered column forming region. Is preferred. It is because it becomes easy to laminate | stack an upper layer on a lower layer.

  The relationship between the planar view area in the laminated column forming region of the lowermost non-pixel colored portion and the planar view area in the laminated column forming region of the upper non-pixel colored portion satisfies the above width ratio. The planar view area in the laminated column forming region of the lowermost non-pixel portion colored portion is preferably larger than the planar view area in the laminated column forming region of the uppermost non-pixel portion colored portion.

  Further, the planar view area in the laminated column forming region of the non-pixel portion colored portion other than the lowermost layer and the uppermost layer may be larger than the planar view area in the laminated column forming region of the non-pixel portion colored portion in the uppermost layer. preferable. This is because it becomes easy to stack the non-pixel portion colored portion of the uppermost layer on the non-pixel portion colored portions other than the lowermost layer and the uppermost layer.

  On the other hand, the planar view area in the laminated column forming region of the non-pixel portion colored portion other than the lowermost layer and other than the uppermost layer may be equal to the planar view area in the laminated column forming region of the lowermost non-pixel portion colored portion. May be different. There is no particular limitation as long as the stacked pillars can have a desired height and desired strength. Specifically, the plane in the stacked column forming region of the non-pixel portion coloring portion other than the lowermost layer and other than the uppermost layer. The viewing area may be equal to the planar view area in the stacked column forming region of the lowermost non-pixel portion colored portion, and is larger than the planar view area in the stacked column forming region of the lowermost non-pixel portion colored portion. Alternatively, it may be smaller than the planar view area in the laminated column forming region of the lowermost non-pixel portion colored portion. For example, in FIG. 1 to FIG. 3, the planar view area in the stacked column forming region 13 of the non-pixel portion coloring portion (5B) of the second layer is the non-pixel portion coloring portion (5R) of the first layer (lowermost layer). It is larger than the planar view area in the laminated column forming region 13. On the other hand, for example, in FIG. 7 to FIG. 9, the planar view area of the non-pixel portion coloring portion (5B) of the second layer in the stacked columnar formation region 13 is the non-pixel portion coloring portion (5R) of the first layer (lowermost layer). ) Is smaller than the planar view area in the stacked column forming region 13.

  Further, among the non-pixel portion coloring portions other than the lowermost layer and the non-uppermost layer, the planar view area in the lower layered column forming region may be equal to or different from the planar view area in the upper layered column forming region. Good. There is no particular limitation as long as the stacked pillar can have a desired height and a desired strength. Specifically, the planar view area in the lower stacked pillar forming area is the same as that in the upper stacked pillar forming area. It may be equal to the planar view area, may be larger than the planar view area in the upper layered column forming region, or may be smaller than the planar view area in the upper layered column forming region.

  The size of the planar view area in the stacked column forming region of each non-pixel colored portion constituting the stacked column is appropriately selected according to the use and type of the lateral electric field liquid crystal driving method color filter of the present invention. Is.

  The height of the stacked pillar varies depending on the thickness of the non-pixel portion colored portion of each color and the number of stacked layers, but is set at about 2.0 μm to 10.0 μm, preferably 2.5 μm to 8.5 μm. In the range of 3.5 μm to 7.5 μm.

In addition, as the height from the surface of the light-shielding part to the top of the transparent protective layer in the part where the laminated pillar is formed, the thickness of the non-pixel part colored part and the transparent protective layer of each color and the number of laminated non-pixel part colored parts However, it is set in the range of about 2.0 μm to 10.0 μm, preferably in the range of 2.5 μm to 8.5 μm, and more preferably in the range of 3.5 μm to 7.5 μm.
In addition, “height from the surface of the light shielding part at the part where the laminated pillar is formed to the top of the transparent protective layer” means that the transparent protection is performed vertically from the surface of the light shielding part at the part where the laminated pillar is formed. The longest distance to the top of the layer.

  The spacer height of the portion where the stacked pillars are formed is not particularly limited as long as it can form a desired cell gap, but specifically, it is in the range of 2.5 μm to 5.0 μm. In particular, it is preferably in the range of 2.5 μm to 4.5 μm, and particularly preferably in the range of 3.0 μm to 4.0 μm. When the spacer height is lower than the above range, it is difficult to control the cell gap, and when the spacer height is higher than the above range, it is difficult to form the stacked columns.

  Among the non-pixel portion coloring portions constituting the laminated pillar, the non-pixel portion coloring portions other than the uppermost non-pixel portion coloring portion are continuously formed with the pixel portion coloring portions having the same color as these non-pixel portion coloring portions. It may be formed or may be formed discontinuously.

  "The non-pixel part coloring part is formed continuously with the pixel part coloring part of the same color as this non-pixel part coloring part" means that the non-pixel part coloring part is continuous with the pixel part coloring part of the same color. It is said that it is integrally formed. For example, in FIG. 1 to FIG. 9, among the non-pixel portion coloring portions constituting the stacked pillar 6, the first red non-pixel portion coloring portion 5 </ b> R is continuously formed integrally with the red pixel portion coloring portion 4 </ b> R. The blue non-pixel portion coloring portion 5B of the second layer is formed continuously and integrally with the blue pixel portion coloring portion 4B.

On the other hand, “the non-pixel part coloring part is formed discontinuously with the pixel part coloring part of the same color as this non-pixel part coloring part” means that the non-pixel part coloring part is the same color pixel part coloring part. It means that it is formed separately. For example, in FIG. 10 and FIG. 11, the red non-pixel part coloring part 5R of the first layer is formed separately from the non-pixel part coloring part constituting the stacked pillar 6 without being in contact with the red pixel part coloring part 4R. The blue non-pixel portion coloring portion 5B of the second layer is formed so as not to be in contact with the blue pixel portion coloring portion 4B.
11 is a cross-sectional view taken along the line HH in FIG. 10, and the transparent protective layer is omitted in FIG.

  In particular, when the number of stacked non-pixel portion coloring portions constituting the stacked pillar is three or more, two or more non-pixel portion coloring portions other than the uppermost non-pixel portion coloring portion are colored in these non-pixel portions. It is preferable that the pixel portion coloring portion having the same color as the portion is continuously formed. The non-pixel portion coloring portion is formed continuously with the same-color pixel portion coloring portion, so that the non-pixel portion coloring portion has a relatively large planar view area in the stacked column forming region. This is because it is easy to relatively widen the width in the long side direction of the opening in the laminated column forming region of the colored portion. In addition, if the area in plan view of the non-pixel portion coloring portion in the stacked column forming region is relatively large, the thickness of the other non-pixel portion coloring portion stacked on the non-pixel portion coloring portion may be relatively thick. it can. Thereby, the height of the laminated pillar can be made relatively high. For this reason, even if the transparent protective layer is formed so as to cover the stacked columns, the spacer height can be made sufficiently large. Accordingly, when the color filter for the lateral electric field liquid crystal driving method of the present invention is used in a liquid crystal display device, the cell gap is uniform and the display quality can be improved.

Here, the reason why the above-described effect is exhibited by the relatively large planar view area in the laminated column forming region of the non-pixel portion colored portion other than the uppermost non-pixel portion colored portion is as follows.
That is, as a method for forming the stacked pillars, a method of applying a photosensitive resin composition for colored portions of each color used for forming the non-pixel portion colored portions is used. For example, when a second-color photosensitive resin composition is applied on the first-layer non-pixel portion colored portion during the formation of the second-layer non-pixel portion colored portion, the second-color photosensitive resin composition for the colored portion is formed. Immediately after coating, a coating film of the photosensitive resin composition for the second colored portion is formed on the first non-pixel portion colored portion and the light shielding portion with a relatively uniform thickness. And the coating film of the 2nd color photosensitive resin composition for coloring parts on the non-pixel part coloring part of the 1st layer produces the leveling which flows down gradually to a low position. Similarly, at the time of forming the non-pixel portion colored portion of the third layer, the coating film of the photosensitive resin composition for the third color portion on the first and second non-pixel portion colored portions is leveled. Produce.
At this time, the non-pixel portion coloring portion other than the uppermost non-pixel portion coloring portion has a relatively large planar view area in the stacked column forming region, and thus the other non-pixel portion coloring portion having a large planar view area is placed on the other portion. When laminating the non-pixel portion colored portions, the leveling of the colored portion photosensitive resin composition used for forming other non-pixel portion colored portions can be suppressed. Therefore, the height of the laminated pillar can be increased. For this reason, even if the transparent protective layer is formed so as to cover the stacked columns, the spacer height can be increased.

  When the number of stacked non-pixel colored portions is 3 or more, the non-pixel colored portion of two or more layers other than the non-pixel colored portion of the uppermost layer is other than the non-pixel colored portion of the uppermost layer. Any of the two or more non-pixel portion coloring portions may be used. For example, when the number of stacked non-pixel portion coloring portions is three, the non-pixel portion coloring portions of two or more layers other than the non-pixel portion coloring portion of the uppermost layer (third layer) are the first non-pixel portion. It becomes a coloring part and a non-pixel part coloring part of the second layer.

  For example, the number of non-pixel colored portions is three, and the first non-pixel colored portion and the second non-pixel colored portion have the same color as these non-pixel colored portions. As shown in FIGS. 1 to 9, the red non-pixel part coloring part 5R in the first layer is continuously formed with the red pixel part coloring part 4R, and A case where the second layer blue non-pixel colored portion 5B is formed continuously with the blue pixel colored portion 4B can be mentioned.

  In addition, among the non-pixel portion coloring portions constituting the stacked pillar, the uppermost non-pixel portion coloring portion is usually formed discontinuously with the pixel portion coloring portion having the same color as the non-pixel portion coloring portion.

  Among the non-pixel part coloring parts constituting the laminated pillar, the non-pixel part coloring parts other than the uppermost non-pixel part coloring part are formed in the laminated column forming region as the formation positions of the non-pixel part coloring parts. Just do it.

  As a formation position of the non-pixel part coloring part other than the non-pixel part coloring part of the uppermost layer, these non-pixel part coloring parts may be formed only in the laminated column forming region. For example, in FIG. 10 and FIG. 11, among the non-pixel portion colored portions constituting the stacked pillar 6, the first red non-pixel portion colored portion 5 </ b> R and the second blue non-pixel portion colored portion 5 </ b> B are formed as stacked columns. It is formed only in the region 13.

In addition, as the formation position of the non-pixel portion coloring portion other than the non-pixel portion coloring portion of the uppermost layer, these non-pixel portion coloring portions are arranged in the short side direction of the stacked column forming region and the opening of the stacked column forming region. Of the adjacent regions adjacent to each other, at least one of the adjacent regions may be formed in a band shape.
For example, in FIGS. 1 to 3, the stacked pillar 6 is formed in the stacked pillar forming region 13 sandwiched between the openings 12 adjacent in the long side direction m, and among the non-pixel portion colored portions constituting the stacked pillar 6 The first-layer red non-pixel portion colored portion 5R and the second-layer blue non-pixel portion colored portion 5B are adjacent to the stacked column forming region 13 and the short side direction n of the opening of the stacked column forming region 13. The adjacent region 14 is formed in a strip shape.

For example, when the number of non-pixel colored portions is three, the first non-pixel colored portion and the second non-pixel portion of the non-pixel colored portions constituting the stacked pillar As shown in FIG. 8, when the colored portion is formed in a strip shape in at least one side of the stacked column forming region and the adjacent region adjacent to the short side of the opening of the stacked column forming region. The first non-pixel portion coloring portion (5R) is formed only in the stacked column forming region 13, and the second non-pixel portion coloring portion (5B) is formed between the stacked column forming region 13 and the stacked column forming region 13. You may form in the strip | belt shape in the adjacent area | region 14 of the one side adjacent to the short side direction n of an opening part. In addition, as illustrated in FIG. 2, the non-pixel portion coloring portion (5R) of the first layer is formed in a band shape in the stacked column forming region 13 and the adjacent region 14 on one side, and the non-pixel portion coloring portion ( 5B) may be formed only in the laminated column forming region 13. Furthermore, as illustrated in FIG. 12, the first non-pixel portion coloring portion (5R) is formed in a strip shape in the laminated column forming region 13 and the adjacent region 14 on one side, and the second non-pixel portion coloring is performed. The part (5B) may be formed in a strip shape in the laminated column forming region 13 and the adjacent region 14 on the other side. Further, as illustrated in FIG. 13, the first non-pixel portion coloring portion (5R) and the second non-pixel portion coloring portion (5B) include the stacked column forming region 13 and the adjacent region 14 on one side. It may be formed in a band shape and may be stacked in the adjacent region 14. Further, as illustrated in FIG. 14, the first non-pixel portion coloring portion (5R) and the second non-pixel portion coloring portion (5B) are strip-shaped in the stacked column forming region 13 and the adjacent regions 14 on both sides. And may be stacked in the adjacent region 14.
12 to 14 are cross-sectional views in the short side direction of the opening including the stacked pillars.

  In particular, when the number of non-pixel colored portions is three, among the non-pixel colored portions constituting the stacked pillar, the first non-pixel colored portion and the second non-pixel colored portion It is preferable that at least one of the portions is formed in a strip shape in the laminated column forming region and at least one adjacent region. When the non-pixel portion coloring portion of the first layer is formed in a strip shape in the laminated column forming region and at least one adjacent region, the second color is colored when the non-pixel portion coloring portion of the second layer is formed. It is possible to suppress leveling of the photosensitive resin composition for a part from the laminated column forming region toward the adjacent region. For this reason, the thickness of the non-pixel portion coloring portion in the second layer can be increased. In addition, when the non-pixel portion coloring portion of the second layer is formed in a band shape in the stacked column forming region and at least one adjacent region, the third color is formed when the non-pixel portion coloring portion of the third layer is formed. It can suppress that the photosensitive resin composition for coloring parts levels from the lamination | stacking column formation area to an adjacent area | region direction. For this reason, the thickness of the non-pixel portion coloring portion in the third layer can be increased. Thus, at least one of the first-layer non-pixel portion colored portion and the second-layer non-pixel portion colored portion is formed in a strip shape in the laminated column forming region and at least one adjacent region, thereby providing a laminated column. The height of can be made high.

  The “adjacent region” is a region adjacent in the short side direction of the opening of the stacked column forming region and is adjacent to both sides in the short side direction of the opening of the stacked column forming region. For example, in FIG. 1, the adjacent region 14 is a region adjacent to both sides in the short-side direction n of the opening of the stacked column forming region 13.

  In addition, “the non-pixel portion coloring portion is formed in a strip shape in the stacked column forming region and the adjacent region” means that the non-pixel portion coloring portion is integrally formed in the stacked column forming region and the adjacent region. That means. For example, in FIGS. 1 to 6, the red non-pixel portion colored portion 5 </ b> R is integrally formed in the stacked column forming region 13 and the adjacent region 14. Further, for example, in FIGS. 4 to 9, the blue non-pixel portion coloring portion 5 </ b> B is integrally formed in the stacked column forming region 13 and the adjacent region 14.

  The formation position of the non-pixel portion coloring portion of the uppermost layer only needs to satisfy the above-mentioned width ratio and the non-pixel portion coloring portion of the uppermost layer is formed in the stacked column forming region. It is set as appropriate according to the use of the color filter for the method.

The number of stacked non-pixel colored portions is three, and the first non-pixel colored portion and the second non-pixel colored portion of the non-pixel colored portions constituting the stacked pillars Is formed in a strip shape in at least one adjacent region of the stacked column forming region and the adjacent region adjacent in the short side direction of the opening of the stacked column forming region, the first non-pixel portion colored portion And the width in the short side direction of the opening in the stacked columnar formation region and the adjacent region of the non-pixel portion coloring portion of the second layer and the non-pixel portion of the second layer and the non-pixel portion of the third layer There is no particular limitation as long as it is possible to suppress the leveling of the photosensitive resin composition for the second and third colored portions from the laminated column forming region toward the adjacent region during the formation of the colored portion. Specifically, the width 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 non-pixel portion coloring portion of the first layer is within the above range, the photosensitive resin composition for the coloring portion of the second color is removed from the laminated column forming region when the non-pixel portion coloring portion of the second layer is formed. This is because leveling in the direction of the adjacent region can be suppressed. For this reason, the height of the laminated column can be made sufficiently high. In addition, since the width of the non-pixel portion coloring portion of the second layer is within the above range, the photosensitive resin composition for the coloring portion of the third color is formed as a laminated column when the non-pixel portion coloring portion of the third layer is formed. This is because leveling from the region toward the adjacent region can be suppressed. For this reason, the height of the laminated pillar can be set to a sufficient height.
In addition, the width in the short side direction of the opening in the stacked column forming region and the adjacent region of the first non-pixel portion coloring portion and the second non-pixel portion coloring portion is the first non-pixel portion For each of the partial coloring portion and the non-pixel portion coloring portion of the second layer, it means the maximum length among the lengths in the short side direction of the opening.

The position of the stacked pillar forming region may be a region sandwiched between openings adjacent in the long side direction. In particular, when the number of stacked non-pixel colored portions is three, the first pixel non-pixel colored portion or the second non-pixel colored portion is formed in the opening where the same colored pixel colored portion is formed. It is preferable that the region is sandwiched, and it is particularly preferable that the region is sandwiched between openings in which a colored portion having the same color as that of the first non-pixel portion colored portion is formed.
When the layered column formation region is a region sandwiched by the opening in which the pixel portion coloring portion of the same color as the non-pixel portion coloring portion of the second layer is formed, when forming the non-pixel portion coloring portion of the third layer The pixel portion coloring portion having the same color as the non-pixel portion coloring portion in the second layer is formed in the opening that sandwiches the stacked columnar formation region. For this reason, it can suppress that the photosensitive resin composition for coloring parts of the 3rd color levels in the long side direction of an opening part from a lamination | stacking column formation area. For this reason, the thickness of the non-pixel colored portion in the third layer can be increased, and the height of the stacked pillar can be increased.
In addition, when the stacked column forming region is a region sandwiched by the opening in which the pixel portion coloring portion of the same color as the first layer non-pixel portion coloring portion is formed, the second layer non-pixel portion coloring portion At the time of formation, the photosensitive resin composition for the colored portion of the second color can be suppressed from leveling from the laminated column forming region in the long side direction of the opening. Further, when forming the non-pixel portion coloring portion of the third layer, the pixel portion coloring portion having the same color as the non-pixel portion coloring portion of the first layer is formed in the opening portion sandwiching the laminated column forming region. It can suppress that the photosensitive resin composition for colored parts of a color leveling from the lamination | stacking column formation area to the long side direction of an opening part. For this reason, the thickness of the non-pixel part coloring part of the second layer and the non-pixel part coloring part of the third layer can be made thick, and the height of the stacked pillar can be made higher.

  The non-pixel part coloring part which comprises a lamination | stacking pillar also comprises the coloring layer mentioned later. Here, a colored layer is formed by apply | coating each photosensitive resin composition for colored parts, and exposing and developing. Therefore, when the number of non-pixel portion coloring portions constituting the stacked pillar is three, and each pixel portion coloring portion formed in the opening is formed in the order of red, blue and green. That is, the photosensitive resin composition for the colored part of the first color to be applied first is red, the photosensitive resin composition for the colored part of the second color to be applied next is blue, and finally applied When the photosensitive resin composition for the colored portion of the third color to be processed is green, the first non-pixel portion colored portion is red, the second non-pixel portion colored portion is blue, the third layer The non-pixel colored portion is green. Accordingly, the colors of the non-pixel portion coloring portions constituting the stacked pillar are different from each other, and are determined according to the order of forming the pixel portion coloring portions of the respective colors formed in the openings.

  The stacked pillar is formed by stacking two or more non-pixel colored portions of each color. The number of stacked non-pixel portion colored portions of each color may be two or more, and may be three, four, or more. Especially, it is preferable that the number of lamination | stacking of a non-pixel part coloring part is three layers. A color filter for a horizontal electric field liquid crystal driving method usually has a colored layer in which pixel portions colored portions of three colors of red, green and blue are arranged. This is because a stacked column having a significant height can be obtained by stacking the pixel portion colored portions.

  The configuration of the stacked pillar is not particularly limited as long as two or more non-pixel colored portions of each color are stacked. In addition, since the non-pixel part coloring part of each color is described in the section of the coloring layer described later, description thereof is omitted here.

  In addition, the stacked pillars only need to be formed on the light-shielding portion in the display area, but it is preferable that the stacked pillars are regularly formed. This is because the gap accuracy can be further improved.

  In the case where a second laminated column described later is formed, the number density of the laminated columns in the display area is in the range of 40% to 80% of the total number density of the laminated columns and the second laminated columns. It is preferably within the range, more preferably within the range of 50% to 75%, and even more preferably within the range of 50% to 70%. This is because when the number density of the stacked pillars is within the above range, the cell gap can have excellent uniformity. In the present invention, as described above, since the laminated column has desired deformation characteristics, the number density of the laminated columns can be relatively increased.

2. Second laminated pillar In the present invention, a plurality of second laminated pillars each having a height lower than that of the laminated pillar and two or more pixel portion coloring portions of each color are laminated on the light shielding portion in the display area. Further, it may be formed.

  The spacer height of the portion where the second stacked pillar is formed is lower than the spacer height of the portion where the stacked pillar is formed. The difference between the spacer height of the portion where the stacked pillar is formed and the spacer height of the portion where the second stacked pillar is formed is preferably 0.5 μm or more, more preferably 0.5 μm to It is in the range of 1.0 μm, more preferably in the range of 0.5 μm to 0.7 μm. If the difference in the spacer height is within the above range, the height of the second stacked pillar can be designed to be relatively low, and the production stability can be enhanced. In the present invention, as described above, since the laminated column has desired deformation characteristics, the height of the second laminated column can be designed to be relatively low.

  In addition, as the height from the surface of the light-shielding portion at the portion where the second stacked pillar is formed to the top of the transparent protective layer, the non-pixel portion colored portion of each color, the thickness of the transparent protective layer, and the non-pixel portion colored portion However, it is set at about 1.5 μm to 9.5 μm, preferably in the range of 2.5 μm to 8.5 μm, more preferably in the range of 3.5 μm to 6.5 μm. It is.

  Furthermore, specifically, the spacer height of the portion where the second stacked pillar is formed is preferably in the range of 1.5 μm to 5.5 μm, and more preferably in the range of 1.5 μm to 4.5 μm. It is preferably within the range, and particularly preferably within the range of 1.5 μm to 3.5 μm.

  The thickness, width, area in plan view, and the like of each non-pixel portion coloring portion constituting the second stacked pillar are not particularly limited as long as the difference in the spacer height can be within the above range.

  The second laminated pillar is usually formed in a second laminated pillar forming region sandwiched between openings adjacent in the long side direction. For example, in FIGS. 4 to 6, the second stacked pillar 8 is formed in the second stacked pillar forming region 15 sandwiched between the openings 12 adjacent in the long side direction m.

  Each non-pixel portion coloring portion constituting the second stacked pillar may be formed continuously or non-continuously with the pixel portion coloring portion having the same color as the non-pixel portion coloring portion. Also good. For example, in FIG. 4 to FIG. 6, among the non-pixel portion coloring portions constituting the second stacked pillar 8, the red non-pixel portion coloring portion 5 </ b> R in the first layer is discontinuously with the red pixel portion coloring portion 4 </ b> R of the same color. The second-layer blue non-pixel portion coloring portion 5B is formed continuously with the same-color blue pixel portion coloring portion 4B, and the third-layer green non-pixel portion coloring portion 5G is the same-color green pixel portion coloring portion 4G. And is formed continuously.

  "The non-pixel part coloring part is formed continuously with the pixel part coloring part of the same color as this non-pixel part coloring part" and "The non-pixel part coloring part has the same color as this non-pixel part coloring part" “It is formed discontinuously with the colored portion of the pixel portion” is the same as that described in the section of the stacked pillar.

  As a formation position of each non-pixel part coloring part which comprises a 2nd lamination pillar, these non-pixel part coloring parts should just be formed in the 2nd lamination pillar formation area. Specifically, the non-pixel portion coloring portion may be formed only in the second stacked column forming region, and the second stacked column forming region and the opening of the second stacked column forming region are provided. Of the second adjacent regions adjacent in the short side direction, at least one second adjacent region may be formed in a band shape. For example, in FIG. 4 to FIG. 6, among the non-pixel portion coloring portions constituting the second stacked pillar 8, the first red non-pixel portion coloring portion 5 </ b> R is formed only in the second stacked column forming region 15. The second non-pixel portion colored portion 5B of the second layer is adjacent to the second laminated column forming region 15 and the second laminated column forming region 15 in the short side direction n adjacent to the opening of the second laminated column forming region 15. The third layer green non-pixel portion colored portion 5G is formed only in the second stacked column forming region 15 and is formed in a band shape in the region 16.

The “second adjacent region” is a region adjacent in the short side direction of the opening of the second stacked columnar forming region, and in the short side direction of the opening of the second stacked columnar forming region. An area adjacent to both sides.
In addition, “the non-pixel portion coloring portion is formed in a strip shape in the second stacked column forming region and the second adjacent region” means that the non-pixel portion coloring portion is in the second stacked column forming region and the second stacked column forming region. That is, it is integrally formed in two adjacent regions.

  The position of the second laminated column forming region is a region sandwiched between openings adjacent in the long side direction, and may be a region other than the laminated column forming region.

  The second stacked pillar is formed by stacking two or more non-pixel colored portions of each color. The number of stacked non-pixel portion colored portions of each color may be two or more, and may be three, four, or more. Especially, it is preferable that the number of lamination | stacking of a non-pixel part coloring part is three layers. The colors of the non-pixel portion coloring portions constituting the second stacked pillar are different from each other, and are determined by the order of forming the pixel portion coloring portions of the respective colors formed in the openings.

  The configuration of the second stacked pillar is not particularly limited as long as two or more non-pixel colored portions of each color are stacked. In addition, since the non-pixel part coloring part of each color is described in the section of the coloring layer described later, description thereof is omitted here.

  In addition, the second stacked pillars only need to be formed on the light-shielding portion in the display area, but it is preferable that the second stacked pillars are regularly formed. This is because the gap accuracy can be further improved.

3. Colored layer In the present invention, the colored layer includes a plurality of color pixel colored portions formed in an opening provided in the light shielding portion described later, and a plurality of non-pixel portions of the same color as the pixel colored portion formed on the light shielding portion. It has a coloring part. In the coloring layer, the pixel portion coloring portion is arranged so that the color of the pixel portion coloring portion adjacent in the long side direction is the same color.

  Furthermore, the color of the pixel portion coloring portion and the non-pixel portion coloring portion may be any number, for example, three colors of red (R), green (G), and blue (B), red (R), green (G), blue (B), yellow (Y), four colors, red (R), green (G), blue (B), yellow (Y), cyan (C), etc. .

  Each color pixel portion colored portion and non-pixel portion colored portion is formed 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.

Examples of the colorant used in the red (R) pixel portion coloring portion and non-pixel portion coloring portion include perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, isoindoline. And pigments. These pigments may be used alone or in combination of two or more.
Examples of the colorant used in the green (G) pixel colored portion and non-pixel colored portion include phthalocyanine pigments such as halogen polysubstituted phthalocyanine pigments or halogen polysubstituted copper phthalocyanine pigments, and triphenylmethane bases. Dyes, isoindoline pigments, isoindolinone pigments and the like. These pigments or dyes may be used alone or in combination of two or more.
Examples of the colorant used in the blue (B) pixel portion coloring portion and non-pixel portion coloring portion include copper phthalocyanine pigments, anthraquinone pigments, indanthrene pigments, indophenol pigments, cyanine pigments, dioxazines. And pigments. These pigments may be used alone or in combination of two or more.

  As the binder resin, a transparent resin is used, and a resin having a desired elastic deformation rate is preferably used. You may use resin which has a different elastic deformation rate for each photosensitive resin composition for coloring parts. Among them, among the non-pixel portion coloring portions constituting the laminated pillar, the lowermost non-pixel portion coloring portion and the same color pixel portion coloring portion, and the uppermost non-pixel portion coloring portion and the same color pixel portion coloring portion. It is preferable to use resins having different elastic deformation rates. Specifically, the elastic deformation rate of the resin used for the lowermost non-pixel portion coloring portion and the same color pixel portion coloring portion is the same as that of the resin used for the uppermost nonpixel portion coloring portion and the same color pixel portion coloring portion. The elastic deformation rate is preferably smaller than the elastic deformation rate. When the color filter for the lateral electric field liquid crystal driving method of the present invention is used in a liquid crystal display device by making the resin used in the lowermost non-pixel portion colored portion and the same color pixel portion colored portion difficult to deform, This is because the resistance to load can be increased and the uniformity of the cell gap can be increased.

  As the binder resin used in the pixel portion coloring portion and the non-pixel portion coloring portion, for example, a photosensitive resin having a reactive vinyl group such as acrylate, methacrylate, polyvinyl cinnamate, or cyclized rubber is used. It is done. In this case, a photopolymerization initiator may be added to the photosensitive resin composition for a colored portion containing a colorant and a photosensitive resin, and further, a sensitizer, a coatability improver, and a development improvement as necessary. An agent, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, etc. may be added.

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

  In order to make the thickness of the non-pixel part coloring part of the uppermost layer out of the non-pixel part coloring part constituting the stacked pillar within a predetermined range, the non-pixel part coloring part of the uppermost layer and the pixel part coloring part of the same color are formed. It is preferable to relatively shorten the time until the drying is started by reducing the pressure after the application of the photosensitive resin composition for the colored portion is completed. Specifically, the above time is preferably set to 60 seconds or less. Thereby, leveling of the photosensitive resin composition for colored portions is suppressed, and the thickness of the non-pixel portion colored portion in the uppermost layer can be easily set within a predetermined range.

4). Light-shielding part The light-shielding part in this invention is formed in a pattern shape on a board | substrate, and is provided with the rectangular-shaped opening part which has a short side and a long side.

  The shape of the opening of the light shielding portion may be a rectangular shape having a short side and a long side, and may be, for example, a rectangle 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, the opening portion 12 having a shape having a notch at the corner of the rectangle as illustrated in FIGS. 15A and 15B, FIG. 15C An elliptical opening 12 as illustrated in FIG. 15 and a polygonal opening 12 as illustrated in FIG.

Examples of the light shielding part 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. Especially, it is preferable that a black colorant is disperse | distributed or melt | dissolved in binder resin in the point that the film thickness of a light-shielding part can be made comparatively thick.

  In the case where the light shielding part is a material in which a black colorant is dispersed or dissolved in a binder resin, the method for forming the light shielding part is not particularly limited as long as the light shielding part can be patterned, For example, the photolithographic method using the photosensitive resin composition for light shielding parts, the printing method, the inkjet method etc. can be mentioned.

In the above case, when a printing method or an inkjet method is used as a method for forming the light shielding portion, 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 method for forming the light shielding portion, 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 a light shielding part containing a colorant and a photosensitive resin, and further a sensitizer, a coating property improver, and a development improvement as necessary. An agent, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, etc. may be added.

  On the other hand, when the light shielding part is a metal thin film, the method for forming the light shielding part is not particularly limited as long as the light shielding part 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 light shielding portion 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 a black colorant is dispersed or dissolved in a binder resin. Is set.

5. Transparent protective layer The transparent protective layer used for this invention is formed so that the said colored layer and a lamination pillar may be covered.

As a material used for the transparent protective layer, it is possible to prevent elution of contaminants into the liquid crystal layer from the colored layer, laminated column, and light shielding portion, and the colored layer surface should have excellent flatness. Anything that can do. As such a material, what is 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 photosensitive resin composition for the transparent protective layer containing the above materials include spin coating, casting, dipping, bar coating, blade coating, roll coating, gravure coating, and flexographic printing. A spray coating method or the like can be used.

  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. By being within the above range, the elution of contaminants to the liquid crystal layer from the light shielding portion, the colored layer, and the stacked pillar can be suppressed.

  In order to make the thickness of the transparent protective layer formed on the laminated pillar relatively thick, after the application of the photosensitive resin composition for the transparent protective layer is completed, the time until the drying is started under reduced pressure, It is preferable to make it relatively short. Specifically, the above time is preferably set to 60 seconds or less. Thereby, leveling of the photosensitive resin composition for transparent protective layers is suppressed, and it becomes easy to make the thickness of the transparent protective layer formed on the laminated pillar into a predetermined range.

6). Substrate As the material of the substrate used in the present invention, 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 does not contain an alkali component in the glass, and therefore can be suitably used for a color filter for a liquid crystal display device. It is.

  The substrate may be a transparent substrate, or may be a reflective substrate or a white one, but a transparent substrate is usually used in the present invention.

7). Other Configurations The color filter for the lateral electric field liquid crystal drive system of the present invention may be any one having the above-described substrate, light-shielding portion, colored layer, laminated column, and transparent protective layer, and if necessary, a transparent electrode layer and an alignment film. The display column may have other configurations such as a laminated pillar outside the display area.

In the present invention, a transparent electrode layer may be formed on the surface of the substrate opposite to the surface on which the light shielding portion, the colored layer, and the stacked column are formed.
Examples of the material for forming the transparent electrode layer include indium tin oxide (ITO), indium oxide, indium zinc oxide (IZO), zinc oxide, and tin oxide.
As a method for forming the transparent electrode layer, for example, a method of forming a thin film by a vacuum deposition method, a sputtering method, an ion plating method or the like and patterning by a photolithography method is preferably used.
Moreover, as a film thickness of a transparent electrode layer, it is normally set at about 100 to 500 mm.

In the present invention, an alignment film may be formed on the transparent protective layer.
The alignment film is not particularly limited as long as it has an alignment function for aligning liquid crystal molecules, and examples thereof include a photo alignment film and a rubbing alignment film.
In the present invention, since the transparent protective layer is formed, it is possible to suppress peeling of the laminated pillars during the rubbing treatment.

  Furthermore, in the present invention, in addition to the above-described stacked columns and second stacked columns, a plurality of stacked columns outside the display area in which two or more non-pixel portion colored portions of each color are stacked are formed outside the display region. May be.

8). FIG. 16 is a process diagram showing an example of a method for manufacturing a color filter for a horizontal electric field liquid crystal driving method according to the present invention.
First, as shown in FIG. 16A, the light shielding part 3 including the opening 12 is formed on the substrate 2.

  Next, as shown in FIG. 16 (b), the red pixel portion coloring portion 4R is formed in the opening 12, and the red non-pixel portion coloring portion 5R constituting the stacked column is simultaneously formed in the stacked column forming region 13. And the red non-pixel part coloring part 5R which comprises a 2nd laminated pillar in the 2nd laminated pillar formation area 15 is formed simultaneously. At this time, the red non-pixel portion coloring portion 5R constituting the stacked pillar is continuously formed with the red pixel portion coloring portion 4R of the same color. At this time, the red non-pixel colored portion 5 </ b> R is formed in a strip shape in the stacked column forming region 13 and the adjacent region 14.

  Next, as shown in FIG. 16 (c), the blue pixel portion coloring portion 4B is formed in the opening 12, and the blue non-pixel portion coloring portion 5B constituting the stacked column is simultaneously formed in the stacked column forming region 13. And the blue non-pixel part coloring part 5B which comprises a 2nd laminated pillar in the 2nd laminated pillar formation area 15 is formed simultaneously. At this time, the blue non-pixel portion coloring portion 5B constituting the stacked column and the second stacked column is continuously formed with the blue pixel portion coloring portion 4B of the same color. At this time, the blue non-pixel portion colored portion 5B is formed in a strip shape in the stacked column forming region 13 and the adjacent region 14, and the blue non-pixel portion is formed in the second stacked column forming region 15 and the second adjacent region 16. The colored portion 5B is formed in a strip shape. Further, at this time, the blue non-pixel portion coloring portion 5B constituting the laminated column and the second laminated column is formed on the red non-pixel portion coloring portion 5R constituting the laminated column and the second laminated column.

  Next, as shown in FIG. 16D, the green pixel portion coloring portion 4G is formed in the opening 12, and the green non-pixel portion coloring portion 5G constituting the stacked column is simultaneously formed in the stacked column forming region 13. And the green non-pixel part coloring part 5G which comprises a 2nd laminated pillar in the 2nd laminated pillar formation area 15 is formed simultaneously. At this time, the green non-pixel colored portion 5G constituting the second stacked pillar is continuously formed with the green pixel colored portion 4G of the same color. At this time, the green non-pixel portion coloring portion 5G constituting the stacked column and the second stacked column is formed on the blue non-pixel portion coloring portion 5B forming the stacked column and the second stacked column. Further, at this time, the thickness of the uppermost green non-pixel portion coloring portion 5G in the non-pixel portion coloring portion constituting the stacked pillar is within a predetermined range, and the lowermost red non-pixel portion coloring portion 5R The width in the long side direction of the opening in the stacked column forming region 13 of the green non-pixel colored portion 5G of the uppermost layer relative to the width in the long side direction of the opening in the stacked column forming region 13 is within a predetermined range. In addition, a green non-pixel colored portion 5G is formed.

Then, although not shown in figure, a transparent protective layer is formed so that a colored layer and a lamination pillar may be covered.
In this way, a color filter for a lateral electric field liquid crystal driving method can be produced.

  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]
(Preparation of curable resin composition)
The polymerization tank is charged with 63 parts by weight of methyl methacrylate (MMA), 12 parts by weight of acrylic acid (AA), 6 parts by weight of 2-hydroxyethyl methacrylate (HEMA), and 88 parts by weight of diethylene glycol dimethyl ether (DMDG). After stirring and dissolving, 7 parts by weight of 2,2′-azobis (2-methylbutyronitrile) was added and dissolved uniformly. Thereafter, the mixture was stirred at 85 ° C. for 2 hours under a nitrogen stream, and further reacted at 100 ° C. for 1 hour. Further, 7 parts by weight of glycidyl methacrylate (GMA), 0.4 parts by weight of triethylamine, and 0.2 parts by weight of hydroquinone were added to the obtained solution, and the mixture was stirred at 100 ° C. for 5 hours to obtain a copolymer resin solution (solid content 50%). )
Next, the following materials were stirred and mixed at room temperature to obtain a curable resin composition.

<Composition of curable resin composition>
-Copolymer resin solution (solid content 50%): 16 parts by weight-Dipentaerythritol pentaacrylate (Sartomer SR399): 24 parts by weight-Orthocresol novolac type epoxy resin (Oka Chemical Shell Epoxy Epicoat 180S70): 4 parts by weight Parts 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one: 4 parts by weight diethylene glycol dimethyl ether: 52 parts by weight

(Formation of light shielding part)
First, the following components were mixed and sufficiently dispersed in a sand mill to prepare a black pigment dispersion.
・ Black pigment: 23 parts by weight ・ Polymer dispersion (Bicchemy Japan Co., Ltd. Disperbyk111): 2 parts by weight ・ Solvent (diethylene glycol dimethyl ether): 75 parts by weight A composition was obtained.

<Composition of composition for light shielding part>
-Black pigment dispersion: 61 parts by weight-Curable resin composition: 20 parts by weight-Diethylene glycol dimethyl ether: 30 parts by weight

  Then, the light shielding layer composition was applied on a 1.1 mm thick glass substrate (Asahi Glass Co., Ltd. AN material) with a spin coater and dried at 100 ° C. for 3 minutes to form a light shielding layer. This light-shielding layer is exposed to a light-shielding pattern with an ultra-high pressure mercury lamp, and then developed with a 0.05 wt% aqueous potassium hydroxide solution. Thereafter, the substrate is left to stand in an atmosphere of 180 ° C. for 30 minutes to be heat-treated for light shielding. A light shielding portion having a thickness of 1.5 μm was formed in a region where the portion should be formed. The obtained light shielding part had a width of 100 μm in the long side direction of the opening.

(Formation of colored layers and laminated columns)
A red curable resin composition having the following composition was applied onto the substrate on which the light shielding part was formed as described above by a spin coating method, and then dried in an oven at 70 ° C. for 3 minutes. Next, a photomask is placed at a distance of 100 μm from the coating film of the red curable resin composition, and ultraviolet rays are applied only to the region corresponding to the colored layer forming region using a 2.0 kW super high pressure mercury lamp by a proximity aligner. Irradiated for 2 seconds. Subsequently, it was immersed in a 0.05 wt% potassium hydroxide aqueous solution (liquid temperature: 23 ° C.) for 1 minute for alkali development to remove only the uncured portion of the coating film of the red curable resin composition. Thereafter, the substrate was left in an atmosphere of 180 ° C. for 30 minutes to perform a heat treatment, thereby forming a red relief pattern in an opening where a red pixel was to be formed and a region necessary for forming a stacked column. This red pattern had a width of 80 μm in the long side direction of the opening in the stacked column forming region.

  Next, using the green curable resin composition having the following composition, a green relief pattern is formed in the opening where the green pixel is to be formed and the area necessary for the formation of the stacked pillars in the same process as the formation of the red relief pattern. did. This green pattern had a width of 75 μm in the long side direction of the opening in the laminated column forming region. Further, using the blue curable resin composition having the following composition, a blue relief pattern was formed in the region where the blue pixel is to be formed and the region necessary for the formation of the laminated pillar in the same process as the formation of the red relief pattern. . In the blue pattern, the width in the long side direction of the opening in the stacked column forming region was 34 μm. Thereby, a colored layer composed of three colors of red (R), green (G), and blue (B) was formed.

<Composition of red curable resin composition>
CI pigment red 177: 10 parts by weight Polysulfonic acid type polymer dispersant: 3 parts by weight The curable resin composition: 5 parts by weight 3-methoxybutyl acetate: 82 parts by weight

<Composition of green curable resin composition>
-CI Pigment Green 36: 10 parts by weight-Polysulfonic acid type polymer dispersant: 3 parts by weight-The above curable resin composition: 5 parts by weight-3-methoxybutyl acetate: 82 parts by weight

<Composition of blue curable resin composition>
CI pigment blue 15: 6: 10 parts by weight Polysulfonic acid type polymer dispersant: 3 parts by weight The above curable resin composition: 5 parts by weight 3-methoxybutyl acetate: 82 parts by weight

(Formation of transparent protective layer)
After applying the curable resin composition by the spin coating method on the substrate on which the colored layer and the laminated column were formed as described above, drying was performed under reduced pressure to form a coating film having a dry coating film thickness of 2 μm. . A photomask is placed at a distance of 100 μm from the coating film of this curable resin composition, and an ultraviolet ray is applied only to the region corresponding to the transparent protective layer forming region using a 2.0 kW super high pressure mercury lamp by a proximity aligner for 10 seconds. Irradiated. Subsequently, it was immersed in a 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 ° C.) for 1 minute and alkali developed to remove only the uncured portion of the coating film of the curable resin composition. Thereafter, the substrate was left to stand in an atmosphere of 200 ° C. for 30 minutes to perform heat treatment to form a transparent protective layer.

(Evaluation)
In the obtained color filter, the thickness of the non-pixel portion colored portion of the uppermost layer among the non-pixel portion colored portions constituting the laminated pillar was 1.4 μm, and w _z / w ₁ was 0.43. In addition, the height from the surface of the light shielding portion to the top of the transparent protective layer on the stacked column is 6.4 μm, and the height from the surface of the transparent protective layer on the colored layer to the top of the transparent protective layer on the stacked column ( The spacer height was 3.5 μm.

The compression property of the color filter laminated column obtained as described above was measured under the following two conditions using a microhardness meter (Fischer H100-V), and the maximum deformation amount was measured.
<Low load conditions>
Planar indenter: 100 μm square Load: The load was increased from 0 mN to 20 mN in 9 seconds and then held for 5 seconds.
<High load conditions>
Planar indenter: 100 μm square Load: The load was increased from 0 mN to 200 mN in 90 seconds, and then held for 5 seconds.

An alignment film made of polyimide was formed on the transparent protective layer of the color filter obtained as described above. Next, a required amount of IPS liquid crystal is dropped on a glass substrate on which TFT is formed, the above color filters are overlaid, and UV curable resin is used as a sealing material, while applying a pressure of 0.3 kgf / cm ^{2 at} room temperature, 400 mJ / cm Bonding was performed by exposure at an irradiation dose of ² , and cells were assembled to obtain a liquid crystal display device.
Screen display was performed on the obtained liquid crystal display device, and unevenness due to cell gap variation was determined. Further, a 10 mmφ metal piece was placed on the liquid crystal display device, a load of 20 kgf / cm ² was applied from the top of the metal piece for 1 minute, the load was removed, and unevenness after 1 minute was observed.

[Example 2]
Among the non-pixel portion colored portions constituting the laminated pillar, the thickness of the uppermost non-pixel portion colored portion is 0.5 μm, and the width in the long side direction of the opening in the laminated pillar forming region is the lowermost layer (first layer). ), The width w ₁ of the non-pixel colored portion is 72 μm, the width of the non-pixel colored portion of the second layer is 68 μm, and the width w _z of the non-pixel colored portion of the uppermost layer (third layer) is 16 μm. w _z / w ₁ = 0.22. In addition, the height from the surface of the light shielding part to the top of the transparent protective layer on the stacked column is 6.0 μm, and the height from the surface of the transparent protective layer on the colored layer to the top of the transparent protective layer on the stacked column (spacer height) Was 3.3 μm. A color filter was produced in the same manner as in Example 1 except for the above.
With respect to the obtained color filter, the compression property of the laminated column was measured by the method described in Example 1.

Next, a liquid crystal display device was produced in the same manner as in Example 1.
The obtained liquid crystal display device was subjected to the determination and observation of unevenness due to cell gap variation by the method described in Example 1.

[Comparative Example 1]
Of the non-pixel portion colored portions constituting the stacked pillar, the thickness of the uppermost non-pixel portion colored portion is 0.3 μm, and the width in the long side direction of the opening in the stacked column forming region is the lowermost layer (first layer). ), The width w ₁ of the non-pixel colored portion is 72 μm, the width of the second non-pixel colored portion is 68 μm, and the width w _z of the non-pixel colored portion of the uppermost layer (third layer) is 18 μm. w _z / w ₁ = 0.25. In addition, the height from the surface of the light shielding part to the top of the transparent protective layer on the laminated column is 6.1 μm, and the height from the surface of the transparent protective layer on the colored layer to the top of the transparent protective layer on the laminated column (spacer height) Was 3.35 μm. A color filter was produced in the same manner as in Example 1 except for the above.
With respect to the obtained color filter, the compression property of the laminated column was measured by the method described in Example 1.

Next, a liquid crystal display device was produced in the same manner as in Example 1.
The obtained liquid crystal display device was subjected to the determination and observation of unevenness due to cell gap variation by the method described in Example 1.

[Comparative Example 2]
The thickness of the uppermost colored layer of the laminated column part is 0.8 μm, and the width w ₁ of the non-pixel colored part of the lowermost layer (first layer) is set as the width in the long side direction of the opening in the laminated column forming region. 60 μm, the width of the non-pixel portion colored portion of the second layer was 56 μm, and the width w _z of the non-pixel portion colored portion of the uppermost layer (third layer) was 49 μm. w _z / w ₁ = 0.82. In addition, the height from the surface of the light shielding part to the top of the transparent protective layer on the laminated column is 5.9 μm, the height from the surface of the transparent protective layer on the colored layer to the top of the transparent protective layer on the laminated column (spacer height) Was set to 3.52 μm. A color filter was produced in the same manner as in Example 1 except for the above.
With respect to the obtained color filter, the compression property of the laminated column was measured by the method described in Example 1.

Next, a liquid crystal display device was produced in the same manner as in Example 1.
The obtained liquid crystal display device was subjected to the determination and observation of unevenness due to cell gap variation by the method described in Example 1.

[Comparative Example 3]
Among the non-pixel portion colored portions constituting the laminated pillar, the thickness of the non-pixel portion colored portion in the uppermost layer is set to 2.2 μm, and the width in the long side direction of the opening in the laminated pillar forming region is set to the lowermost layer (first layer). ), The width w ₁ of the non-pixel colored portion is 72 μm, the width of the second non-pixel colored portion is 68 μm, and the width w _z of the non-pixel colored portion of the uppermost layer (third layer) is 66 μm. w _z / w ₁ = 0.92. In addition, the height from the surface of the light shielding part to the top of the transparent protective layer on the laminated column is 8.9 μm, the height from the surface of the transparent protective layer on the colored layer to the top of the transparent protective layer on the laminated column (spacer height) ) Was 3.54 μm. A color filter was produced in the same manner as in Example 1 except for the above.
With respect to the obtained color filter, the compression property of the laminated column was measured by the method described in Example 1.

Next, a liquid crystal display device was produced in the same manner as in Example 1.
The obtained liquid crystal display device was subjected to the determination and observation of unevenness due to cell gap variation by the method described in Example 1.

[Comparative Example 4]
Of the non-pixel portion colored portions constituting the stacked pillar, the thickness of the uppermost non-pixel portion colored portion is set to 0.8 μm, and the width in the long side direction of the opening in the stacked column forming region is set to the lowermost layer (first layer). ), The width w ₁ of the non-pixel colored portion is 85 μm, the width of the second non-pixel colored portion is 70 μm, and the width w _z of the non-pixel colored portion of the uppermost layer (third layer) is 13 μm. was w _z / w ₁ = 0.15. In addition, the height from the surface of the light shielding part to the top of the transparent protective layer on the laminated column is 8.9 μm, the height from the surface of the transparent protective layer on the colored layer to the top of the transparent protective layer on the laminated column (spacer height) ) Was 3.54 μm. A color filter was produced in the same manner as in Example 1 except for the above.
With respect to the obtained color filter, the compression property of the laminated column was measured by the method described in Example 1.

Next, a liquid crystal display device was produced in the same manner as in Example 1.
The obtained liquid crystal display device was subjected to the determination and observation of unevenness due to cell gap variation by the method described in Example 1.

[Evaluation]
Table 1 shows the evaluation results of Examples 1 and 2 and Comparative Examples 1 to 4.

It is a schematic plan view which shows an example of the color filter for horizontal electric field liquid crystal drive systems of this invention. It is the sectional view on the AA line in FIG. FIG. 5 is a cross-sectional view taken along line BB in FIG. 1 and a cross-sectional view taken along line DD in FIG. 4. It is a schematic plan view which shows the other example of the color filter for horizontal electric field liquid crystal drive systems of this invention. It is CC sectional view taken on the line in FIG. It is the EE sectional view taken on the line in FIG. It is a schematic plan view which shows the other example of the color filter for horizontal electric field liquid crystal drive systems of this invention. It is the FF sectional view taken on the line in FIG. It is the GG sectional view taken on the line in FIG. It is a schematic plan view which shows the other example of the color filter for horizontal electric field liquid crystal drive systems of this invention. It is the HH sectional view taken on the line in FIG. It is a schematic sectional drawing which shows the other example of the color filter for horizontal electric field liquid crystal drive systems of this invention. It is a schematic sectional drawing which shows the other example of the color filter for horizontal electric field liquid crystal drive systems of this invention. It is a schematic sectional drawing which shows the other example of the color filter for horizontal electric field liquid crystal drive systems of this invention. 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 for horizontal electric field liquid crystal drive systems of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Color filter for a horizontal electric field liquid crystal drive system 2 ... Board | substrate 3 ... Light-shielding part 4 ... Colored layer 4R ... Red pixel part coloring part 4G ... Green pixel part coloring part 4B ... Blue pixel part coloring part 5R ... Red non-pixel part coloring part 5G: green non-pixel portion colored portion 5B: blue non-pixel portion colored portion 6: laminated column 7 ... transparent protective layer 8 ... second laminated column d1: height of laminated column h1: of the portion where the laminated column is formed Spacer height t ... thickness of the non-pixel portion colored portion in the uppermost layer w ₁ ... width of the non-pixel portion colored portion in the lowermost layer w _z ... width of the non-pixel portion colored portion in the uppermost layer

Claims (3)

A substrate, a light-shielding portion that is formed in a pattern on the substrate and includes a rectangular opening having a short side and a long side, a plurality of color pixel coloring portions formed in the opening, and the light-shielding A plurality of non-pixel portion coloring portions of the same color as the plurality of pixel portion coloring portions, and the color of the pixel portion coloring portion adjacent in the long side direction of the opening is the same color. A colored layer, a plurality of stacked columns formed on the light-shielding portion in the display area, the non-pixel portion colored portions of each color being stacked in two or more layers, and the colored layer and the stacked columns are formed so as to cover A color filter for a horizontal electric field liquid crystal driving system having a transparent protective layer,
The laminated pillar is formed in a laminated pillar forming region sandwiched between the openings adjacent in the long side direction,
Among the non-pixel portion coloring portions constituting the laminated pillar, the thickness of the non-pixel portion coloring portion in the uppermost layer is in the range of 0.5 μm to 1.4 μm,
Of the non-pixel portion colored portions constituting the laminated pillar, the width of the long side direction of the opening in the laminated pillar forming region of the non-pixel portion colored portion in the lowermost layer is w ₁ , and the laminated pillar is constituted. When the width in the long side direction of the opening in the stacked column forming region of the non-pixel portion coloring portion in the uppermost layer among the non-pixel portion coloring portions is w _z , 0.22 <w _z / A color filter for a lateral electric field liquid crystal driving method, characterized by satisfying a relationship of w ₁ <0.43 . A plurality of second stacked columns formed on the light-shielding portion in the display region, having a lower height than the stacked columns, and in which two or more non-pixel colored portions of each color are stacked;
The difference between the spacer height of the portion where the laminated pillar is formed and the spacer height of the portion where the second laminated pillar is formed is 0.5 μm or more,
2. The number density of the stacked columns in the display area is in a range of 40% to 80% of the total number density of the stacked columns and the second stacked columns. Color filter for horizontal electric field liquid crystal drive system.   The number of the non-pixel portion colored portions constituting the laminated pillar is three or more layers, and among the non-pixel portion colored portions constituting the laminated pillar, two layers other than the uppermost non-pixel portion colored portion The horizontal electric field liquid crystal according to claim 1, wherein the non-pixel portion coloring portion is formed continuously with the pixel portion coloring portion having the same color as the non-pixel portion coloring portion. Color filter for drive system.

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