JP5604934B2 - Color filter for transmissive LCD - Google Patents

Description

  The present invention relates to a color filter for a transmissive liquid crystal display device capable of displaying an image with high luminance and good color development, and a transmissive liquid crystal display device using the same.

  In recent years, with the development of personal computers, particularly portable personal computers, the demand for liquid crystal display devices has increased. Recently, the penetration rate of home-use liquid crystal televisions is also increasing, and the market for liquid crystal display devices is expanding. Furthermore, liquid crystal display devices that have become widespread in recent years tend to have larger screens, and the tendency is particularly strong for home-use liquid crystal televisions. In such a situation, it is desired to manufacture a liquid crystal display device that is low-cost and high-quality with high productivity, and in particular, a color that has a function of colorizing the liquid crystal display device. Such a request is increasing because the filter has been conventionally expensive.

  Here, the color filter is usually formed in a transparent substrate, a light shielding portion formed on the transparent substrate, and an opening defined by the light shielding portion, and a pixel portion having a colored layer for a plurality of color pixel portions. It has.

In the liquid crystal display device, a color filter and a counter substrate are opposed to each other, a liquid crystal compound is sealed between the two to form a thin liquid crystal layer, and the liquid crystal alignment in the liquid crystal layer is electrically controlled by the counter substrate. Thus, display is performed by selectively changing the amount of light transmitted to the color filter.
In such a liquid crystal display device, the gap (cell gap) between the color filter and the counter substrate is the thickness of the liquid crystal layer itself, preventing display unevenness such as color unevenness and contrast unevenness, uniform display, and high-speed response. In order to give the liquid crystal display device good display performance such as a high contrast ratio and a wide viewing angle, it is necessary to maintain the cell gap constant and uniform.

  As a method of maintaining the cell gap, conventionally, a method of forming a columnar spacer made of a resin material on the light shielding portion is used. However, when the columnar spacer is separately formed, the manufacturing cost is increased. There was a problem.

Therefore, in order to reduce the manufacturing cost, it has been proposed to use a laminated spacer in which a colored layer is laminated instead of a columnar spacer using a resin material (Patent Document 1).
FIG. 5 is a schematic cross-sectional view illustrating an example of a color filter. As shown in FIG. 5A, the color filter 10 ′ is formed in a transparent substrate 1, a light shielding portion 2 formed on the transparent substrate 1, and an opening defined by the light shielding portion 2. Formed on the light-shielding part 2 and the pixel part 3 having the colored layer for part (in FIG. 5A, the colored layer 3R for red pixel part, the colored layer 3G for green pixel part, and the colored layer 3B for blue pixel part) A multi-color spacer coloring layer (in FIG. 5A, a red spacer coloring layer 4R, a green spacer coloring layer 4G, and a blue spacer coloring layer 4B) is laminated. . As shown in FIG. 5A, since the laminated spacer 4 can be formed simultaneously with the formation of the pixel portion coloring layer, the manufacturing cost can be reduced.

Incidentally, in recent years, in liquid crystal display devices, since it is desired to display an image with high luminance, it is required to increase the aperture ratio of the opening of the light shielding part, and the light shielding to narrow the line width of the light shielding part. Thinning of parts is under consideration.
Here, the laminated spacer is formed by applying a colored layer forming coating solution on the light shielding portion and the spacer colored layer formed on the light shielding portion. In order to increase the height, it is necessary to apply the colored layer forming coating solution to a light shielding portion or the like with a certain thickness. However, as shown in FIG. 5B, when the light-shielding part 2 is thinned, the area of the light-shielding part 2 that becomes the base of the laminated spacer 4 is reduced. If it is formed by applying a colored layer forming coating solution in accordance with the thickness of the colored layer for the pixel portion, as in the past, the laminated spacer actually formed There was a problem that the height of 4 would be lower than desired.

Japanese Patent Laid-Open No. 5-196946

  The present invention provides a transmissive liquid crystal having a laminated spacer capable of maintaining a sufficient cell gap when used in a transmissive liquid crystal display device and capable of displaying an image with high brightness. A main object is to provide a color filter for a display device.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have formed on the light-shielding portion by increasing the coating thickness of the colored layer-forming coating solution during the production of the color filter. The spacer colored layer can be formed in a thick film, and therefore, it is found that the height of the laminated spacer can be sufficient even when the light shielding portion is thinned. With respect to the pixel portion coloring layer formed simultaneously with the spacer coloring layer, it is possible to impart luminance and chromaticity for performing good image display by performing chromaticity adjustment processing. The headline and the present invention have been completed.

  The present invention has been made to solve the above problems, and is formed of a transparent substrate, a light-shielding portion formed on the transparent substrate, and an opening defined by the light-shielding portion. A color filter having a pixel portion having a coloring layer for a portion and a laminated spacer formed on the light-shielding portion and formed by laminating a plurality of colored coloring layers for spacers, wherein the coloring for the pixel portion is at least one color The layer is provided with a color filter in which a chromaticity adjustment process for adjusting the chromaticity of the pixel portion coloring layer is performed.

  According to the present invention, it is possible to increase the thickness of the spacer coloring layer formed simultaneously with the pixel portion coloring layer. Therefore, even if the light shielding portion is thinned, It is possible to make the height of the laminated spacer formed on the part sufficient. In addition, by applying the chromaticity adjustment process to the pixel portion coloring layer, it is possible to impart luminance and chromaticity capable of performing good image display.

  In the present invention, it is preferable that the chromaticity adjustment process is an opening forming process in which an opening is provided in at least a part of the colored portion for the pixel portion. This is because it becomes easy to make adjustment so that the colored layer for the pixel portion has a predetermined luminance and chromaticity.

  In the present invention, it is preferable that the chromaticity adjustment process is a concavo-convex formation process in which concavo-convex is provided on at least a part of the surface of the pixel portion coloring layer. This is because it becomes easy to make adjustment so that the colored layer for the pixel portion has a predetermined luminance and chromaticity.

  The present invention provides a transparent substrate, a light shielding portion formed on the transparent substrate, a pixel portion having a colored layer for a plurality of pixel portions formed in an opening defined by the light shielding portion, and the light shielding portion. A color spacer for adjusting the chromaticity of the pixel portion coloring layer, wherein the pixel portion coloring layer has at least one color. A transmissive liquid crystal display device comprising: a color filter subjected to a degree adjustment process; a counter substrate; and a liquid crystal layer provided between the color filter and the counter substrate.

  According to the present invention, since the color filter is provided, a high-quality transmissive liquid crystal display device capable of maintaining a uniform cell gap and performing excellent image display can be obtained.

  According to the present invention, since the chromaticity adjustment process is performed on the colored layer for the pixel portion, the laminated spacer having a sufficient height even if the light shielding portion is thinned, and It is possible to obtain a color filter for a transmissive liquid crystal display device in which a colored layer for a pixel portion having luminance and chromaticity capable of displaying an image satisfactorily is formed.

It is a schematic sectional drawing which shows an example of the color filter of this invention. It is a schematic sectional drawing which shows another example of the color filter of this invention. It is a schematic sectional drawing which shows another example of the color filter of this invention. It is a schematic sectional drawing which shows another example of the color filter of this invention. It is a schematic sectional drawing which shows an example of a color filter.

  Hereinafter, the color filter for a transmissive liquid crystal display device and the transmissive liquid crystal display device of the present invention will be described.

A. Color filter for transmissive liquid crystal display device The color filter for transmissive liquid crystal display device of the present invention (hereinafter sometimes simply referred to as a color filter) includes a transparent substrate, a light-shielding portion formed on the transparent substrate, A pixel portion formed in the opening defined by the light-shielding portion and having a color layer for a plurality of color pixel portions; and a laminated spacer formed on the light-shielding portion and having a plurality of color layers for spacers laminated. A chromaticity adjustment process for adjusting the chromaticity of the pixel portion coloring layer is performed on at least one color of the pixel portion coloring layer. Is.

  Here, the “chromaticity adjusting process” in the present invention is a process for adjusting the luminance and chromaticity of the colored layer for the pixel portion so that a good image display can be performed in the transmissive liquid crystal display device. More specifically, it refers to a process of reducing the average film thickness of the pixel portion coloring layer as compared with the case where the chromaticity adjustment process is not performed.

  As described above, in recent years, in a transmissive liquid crystal display device, since it is desired to display an image with high luminance, it is required to increase the aperture ratio of the opening portion of the light shielding portion. Thinning of the light-shielding part to reduce the width is being studied. Here, the laminated spacer is formed by applying a colored layer forming coating solution on the light shielding portion and the spacer colored layer formed on the light shielding portion. In order to increase the height, it is necessary to apply the colored layer forming coating solution to a light shielding portion or the like with a certain thickness. However, when the light-shielding part is thinned, it becomes difficult to apply the colored layer forming coating solution with a thickness because the area of the light-shielding part serving as a base of the laminated spacer is reduced. In the same way as in the past, when the colored layer forming coating solution is applied in accordance with the thickness of the colored layer for the pixel portion, the height of the actually formed laminated spacer is lower than the desired height. There was a problem such as.

  Therefore, as a result of intensive studies, the inventors of the present invention have increased the thickness of the spacer coloring layer on the thinned light-shielding portion by increasing the coating thickness of the coloring layer forming coating solution during the production of the color filter. An attempt was made to make the stacking spacer formed on the light-shielding portion sufficiently high by using a film.

  However, the spacer coloring layer and the pixel portion coloring layer are usually formed at the same time. Therefore, when the coating thickness of the coloring layer forming coating liquid is increased, the pixel portion coloring layer is formed. Also, the layer is formed thicker than the colored layer for the pixel portion used in a normal color filter. As a result, the luminance of the colored layer for the pixel portion is reduced or the chromaticity of the colored portion for the pixel portion is displayed as an image. There may be a problem that it becomes unsuitable.

  Therefore, the present inventors tried to adjust the luminance and chromaticity of the pixel portion coloring layer to those suitable for image display by performing the chromaticity adjustment processing on the pixel portion coloring layer. As a result of further studies, the present invention has been completed.

As described above, the present invention provides a method for adjusting a colored layer for a pixel portion that has not been performed in a conventional color filter, that is, the spacer colored layer and the pixel portion according to the height of the laminated spacer. An adjustment method for adjusting the luminance and chromaticity of the colored layer for the pixel portion by applying a chromaticity adjusting process for forming the colored layer in a thick film and reducing the average thickness of the colored layer for the pixel portion is adopted. The point has a great feature.
Hereinafter, each member used for the color filter of this invention is demonstrated.

1. Pixel part The pixel part used for this invention is formed in the opening part demarcated by the said light-shielding part, and has the colored layer for pixel parts of multiple colors. Hereinafter, the colored layer for the pixel portion will be described.

(1) Colored layer for pixel part The colored layer for pixel part in this invention consists of the colored layer for pixel parts of several colors, and the color of the said colored part for pixel parts is contained in the colored layer for pixel parts of at least 1 color or more. A chromaticity adjustment process for adjusting the degree is performed. Further, the colored layer for the pixel portion and the colored layer for spacer constituting the laminated spacer described later are composed of the same colored layer forming composition.
Hereinafter, each of the chromaticity adjustment treatment and the colored layer forming composition will be described.

(A) Chromaticity Adjustment Processing As described above, the chromaticity adjustment processing in the present invention is performed so that the luminance and chromaticity of the colored layer for the pixel portion can be displayed in a transmissive liquid crystal display device. More specifically, it is a process for reducing the average film thickness of the pixel portion coloring layer as compared with the case where the chromaticity adjustment process is not performed.

  The chromaticity adjustment process is not particularly limited as long as the average film thickness of the color layer for the pixel portion can be reduced as compared with the case where the chromaticity adjustment process is not performed. When forming an opening forming process for forming an opening in at least a part of the colored layer for the pixel part, forming an uneven part on at least a part of the surface of the colored part for the pixel part, and forming the colored layer for the pixel part Further, by performing exposure using a gradation mask or the like, a thinning process for forming the pixel portion coloring layer into a thin film can be given.

  Among the chromaticity adjustment processes described above, preferable chromaticity adjustment processes include an opening forming process and an unevenness forming process in view of the simplicity of the processing method and the like. Hereinafter, the opening forming process and the unevenness forming process will be described.

(I) Opening Forming Process First, the opening forming process in the present invention will be described.
The opening forming process used in the present invention is a process that is applied to at least one pixel-colored layer, and is a process that provides an opening in at least a part of the pixel-colored layer.

Here, a color filter having a colored layer for a pixel portion that has been subjected to the opening forming process will be described with reference to the drawings.
FIG. 1 is a schematic sectional view showing an example of the color filter of the present invention. As shown in FIG. 1, the color filter 10 of the present invention includes a transparent substrate 1, a light shielding portion 2 formed on the transparent substrate 1, and a pixel portion 3 formed in an opening defined by the light shielding portion 2. And a laminated spacer 4 formed on the light-shielding portion 2. In the present invention, the pixel unit 3 includes a plurality of color pixel layer coloring layers (in FIG. 1, a red pixel unit coloring layer 3R, a green pixel unit coloring layer 3G, and a blue pixel unit coloring layer 3B). The colored layer for the pixel portion of each color has an opening A. The laminated spacer 4 is formed by laminating a plurality of colored layers for spacers (in FIG. 1, a colored layer for red spacer 4R, a colored layer for green spacer 4G, and a colored layer for blue spacer 4B).
Note that FIG. 1 shows an example in which an opening forming process is performed on the color layer for each color pixel portion. However, in the present invention, the above-mentioned opening portion is formed on at least one color pixel layer color layer. There is no particular limitation as long as the forming process is performed.

  According to the present invention, the pixel portion coloring layer is subjected to an opening forming process, so that the pixel portion coloring layer is formed in the opening portion of the light shielding portion and the pixel portion. Since there is a region where the colored layer for forming is not formed, the average film thickness of the entire colored layer for pixel portion formed in the opening of the light shielding portion can be reduced. As a result, the pixel-layer colored layer that has been subjected to the opening formation process can have higher luminance than the state in which the opening formation process has not been performed, and the chromaticity is also suitable for image display. It is possible to adjust to

  The area ratio of the openings in the color layer for the pixel portion is particularly limited as long as the chromaticity of the color layer for the pixel portion of the present invention can be set to such an extent that good image display can be performed. However, it is preferably in the range of 1% to 50%, more preferably in the range of 1% to 40%, and particularly preferably in the range of 1% to 20%. When the area ratio of the opening is less than the above range or exceeds the above range, it may be difficult to perform good image display using the color filter of the present invention for a transmissive liquid crystal display device. Because there is.

  The number of openings formed in the pixel portion coloring layer may be any number that allows the chromaticity of the pixel portion coloring layer of the present invention to be such that good image display can be performed. It is not specifically limited, It is preferable that it is at least 1 or more, especially in the range of 1 to 10 pieces, particularly in the range of 1 to 8 pieces. If the number of openings exceeds the above range, it is necessary to reduce the area of each opening, which may make it difficult to form the openings in the colored layer for the pixel portion. is there.

The shape of the opening formed in the pixel portion coloring layer by the opening formation process is such that the chromaticity of the pixel portion coloring layer of the present invention is such that good image display can be performed. The shape is not particularly limited as long as it can be formed, and examples thereof include a circular shape, a rectangular shape, and a polygonal shape.
In the case where a plurality of the openings are provided in the colored layer for the pixel portion, they can be provided in a regular pattern. Examples of such patterns include stripes, dots, and checkered patterns.

  The thickness of the colored layer for the pixel portion when the opening forming process is performed may be such that the colored layer for the pixel portion can have luminance and chromaticity capable of performing good image display. Although not particularly limited, it is preferably in the range of 1 μm to 10 μm, more preferably in the range of 1 μm to 8 μm, and particularly preferably in the range of 1 μm to 5 μm. When the thickness of the colored layer for the pixel portion exceeds the above range, the luminance and chromaticity can be imparted so that a good image display can be performed even if the aperture forming process is performed on the colored layer for the pixel portion. This is because it becomes difficult. In addition, it is difficult to form the color filter of the present invention in a thin film. In addition, when the thickness of the pixel portion coloring layer is less than the above range, the spacer coloring layer formed at the same time as the pixel portion coloring layer is formed in a thin film. This is because it may be difficult to make the thickness sufficient.

(Ii) Concavity and convexity formation processing Next, the concavity and convexity formation processing in the present invention will be described. In the present invention, the unevenness forming process is a process performed on the colored layer for the pixel portion of at least one color, and is a process for providing unevenness on at least a part of the surface of the colored layer for the pixel portion.

Here, a color filter having a colored layer for a pixel portion that has been subjected to the unevenness forming process will be described with reference to the drawings. FIG. 2 is a schematic sectional view showing an example of the color filter of the present invention. As shown in FIG. 2, the color filter 10 of the present invention includes a transparent substrate 1, a light shielding portion 2 formed on the transparent substrate 1, and a pixel portion 3 formed in an opening defined by the light shielding portion 2. And a laminated spacer 4 formed on the light-shielding portion 2. In the present invention, the pixel unit 3 includes a plurality of color pixel layer coloring layers (in FIG. 2, a red pixel unit coloring layer 3R, a green pixel unit coloring layer 3G, and a blue pixel unit coloring layer 3B). Concavities and convexities are formed on the surface of the colored layer for the pixel portion. The laminated spacer 4 is formed by laminating a plurality of colored layers for spacers (in FIG. 2, a colored layer for red spacer 4R, a colored layer for green spacer 4G, and a colored layer for blue spacer 4B).
Note that FIG. 2 shows an example in which the unevenness forming process is performed on the color layer for the pixel portion of each color. However, in the present invention, the unevenness forming process is performed on the colored layer for the pixel portion of at least one color. If it is given, it will not specifically limit.

  According to the present invention, the unevenness forming process is performed on the colored layer for the pixel portion, whereby the average film thickness of the entire colored layer for the pixel portion formed in the opening of the light-shielding portion is set to the unevenness forming. It can be made small compared with the case where the process is not performed. Therefore, it is possible to improve the luminance of the pixel portion coloring layer and to make the chromaticity of the pixel portion coloring layer suitable for image display.

  The unevenness formed on the surface of the colored layer for pixel portion is not particularly limited as long as it is formed on at least a part of the surface of the colored layer for pixel portion. It may be formed only on the part, or may be formed on the entire colored layer for the pixel part, but more preferably formed on the entire colored layer for the pixel part. This is because the unevenness is formed on the entire surface of the pixel portion coloring layer, thereby making it possible to perform better image display.

  Moreover, when the said unevenness | corrugation is formed in the whole colored layer for said pixel parts, the said unevenness | corrugation may be formed in the regular pattern shape, or the said unevenness | corrugation is formed in the irregular pattern shape. However, it is preferable that the irregularities are formed in a regular pattern. This is because the chromaticity of the pixel portion coloring layer can be easily adjusted.

  Such a pattern shape is not particularly limited as long as it can make the chromaticity of the colored layer for the pixel portion suitable for image display by forming the irregularities on the entire surface of the colored layer for the pixel portion. In this case, a stripe shape, a dot shape, a lattice shape, a checkered pattern, and the like can be given.

  The height of the concavo-convex convex portion is not particularly limited as long as the chromaticity of the colored layer for the pixel portion can be adjusted, but is in the range of 0.05 μm to 1.00 μm. In particular, it is preferably in the range of 0.10 μm to 0.50 μm, particularly preferably in the range of 0.15 μm to 0.40 μm. When the height of the convex part of the unevenness is less than the above range or exceeds the above range, even if the unevenness is formed on the surface of the colored layer for the pixel part, This is because it is difficult to make the chromaticity suitable for image display. Further, if the height of the unevenness exceeds the above range, it may be difficult to align the liquid crystal material in the liquid crystal layer in a predetermined direction when the color filter is used in a transmissive liquid crystal display device. Because there is. In addition, the height of the convex part of the unevenness indicates a difference between the maximum height and the minimum height of the colored layer for the pixel part from the surface of the transparent substrate.

  The average film thickness of the colored layer for the pixel portion that has been subjected to the unevenness forming process is such that the colored layer for the pixel portion can have luminance and chromaticity capable of performing good image display. Although not particularly limited, it is preferably in the range of 0.5 μm to 5.0 μm, more preferably in the range of 1.0 μm to 4.5 μm, and particularly preferably in the range of 1.5 μm to 4.0 μm. When the average film thickness of the pixel portion coloring layer exceeds the above range, brightness and chromaticity are imparted so that good image display can be performed even if the unevenness forming process is performed on the pixel portion coloring layer. This is because it becomes difficult. In addition, when the average film thickness of the pixel portion coloring layer is less than the above range, the spacer coloring layer formed at the same time as the pixel portion coloring layer is formed in a thin film. This is because there is a possibility that it may be difficult to make the height of the sufficient height.

(Iii) Chromaticity adjustment processing In the present invention, if the chromaticity of the colored layer for the pixel portion can be suitable for image display, the opening formation processing may be performed, or the unevenness formation may be performed. Although a treatment may be performed, it is more preferable to perform the above-described unevenness formation treatment. When the chromaticity of the pixel portion colored layer is adjusted to an equivalent value, the pixel portion colored layer subjected to the unevenness forming process has a luminance higher than the pixel portion colored layer subjected to the opening forming process. It is because it can be made high.

Here, when the chromaticity of the colored layer for the pixel portion is adjusted to an equivalent value, the colored layer for the pixel portion that has been subjected to the unevenness forming process is more preferably the colored layer for the pixel portion that has been subjected to the opening forming process. The reason why the luminance can be made higher than that is not clear, but is considered as follows.
In a color filter having a colored layer for a pixel portion that has been subjected to the opening formation process, an overcoat layer made of a transparent resin or the like is normally used in the opening. Therefore, when the chromaticity of the pixel portion coloring layer is adjusted to an equivalent value, the pixel portion coloring layer that has undergone the opening formation processing is compared to the pixel portion coloring layer that has undergone the unevenness formation processing. It is considered that the color purity of the entire colored layer for the pixel portion is lowered by including the overcoat layer. For this reason, it is considered that the luminance of the colored layer for the pixel portion that has been subjected to the above-described unevenness forming process, in which the color purity of the entire colored portion of the pixel portion is high, is higher.

In the present invention, the chromaticity adjustment processing is particularly limited as long as it is applied to at least one color layer for the pixel portion among the plurality of pixel portion color layers formed in the pixel portion. However, as shown in FIG. 1 described above, only the opening forming process may be performed as the chromaticity adjusting process, or as shown in FIG. 2 described above, the unevenness forming is performed as the chromaticity adjusting process. Only processing may be performed. Further, as shown in FIG. 3, the same color filter was subjected to the pixel portion coloring layer (in FIG. 3, the red pixel portion coloring layer 3 </ b> R) subjected to the opening formation processing and the unevenness formation processing. The chromaticity adjustment processing may be performed so as to have each of the pixel portion coloring layers (green pixel portion coloring layer 3G in FIG. 3). Moreover, as shown in FIG. 4, the opening part formation process and the uneven | corrugated formation process may be given to the colored layer for pixel parts of the same color. Note that FIG. 4 shows an example in which an opening forming process and a concavo-convex forming process are performed on the color layer for each pixel portion.
3 and 4 are schematic cross-sectional views showing an example of the color filter of the present invention. Reference numerals not described here can be the same as those in FIG. 1 and FIG. Description is omitted.

  Although not shown, the opening forming process and the concavo-convex forming process may be used together with chromaticity adjustment processes other than the opening forming process and the concavo-convex forming process.

(B) Composition for forming colored layer Next, the composition for forming a colored layer used for the colored layer for the pixel portion will be described.
The colored layer forming composition can form a colored layer for a spacer which can form the colored layer for the pixel portion and can make a laminated spacer described later sufficiently high. Although it will not specifically limit if it is possible, It is preferable that the lamination | stacking efficiency of the said composition for colored layer formation is high. This is because, since the lamination efficiency of the colored layer forming composition is high, it is easy to form the spacer colored layer in a thick film and make the laminated spacer sufficiently high.

  Here, the lamination efficiency of the colored layer forming composition refers to the thickness of the colored layer for the pixel portion when the colored layer for the pixel portion and the colored layer for the spacer are formed using the colored layer forming composition. This is a value indicating the film thickness ratio of the spacer coloring layer when 1.

  The colored layer forming composition usually contains a polymer component, a monomer component, a colorant, a reaction initiator, and the like.

  The polymer component is not particularly limited as long as the colored layer for the pixel portion and the colored layer for the spacer can be formed with a predetermined film thickness, and is used for a colored layer of a general color filter. Although it can be the same as that of a thing, it is preferable that it is a polymer component which can make the lamination | stacking efficiency of the said composition for colored layer formation high among them. Examples of such polymer components include ethylene-vinyl acetate copolymer, ethylene-vinyl chloride copolymer, ethylene vinyl copolymer, polystyrene, acrylonitrile-styrene copolymer, ABS resin, polymethacrylic acid resin, ethylene Methacrylic acid resin, polyvinyl chloride resin, chlorinated vinyl chloride, polyvinyl alcohol, cellulose acetate propionate, cellulose acetate butyrate, nylon 6, nylon 66, nylon 12, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyvinyl acetal, poly Ether ether ketone, polyether sulfone, polyphenylene sulfide, polyarylate, polyvinyl butyral, epoxy resin, phenoxy resin, polyimide resin, poly Midoimide resin, polyamic acid resin, polyetherimide resin, phenol resin, urea resin, etc., and polymerizable monomers such as methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, isopropyl Acrylate, isopropyl methacrylate, sec-butyl acrylate, sec-butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, n-pentyl acrylate, n-pentyl methacrylate, n-hexyl acrylate, n-hexyl methacrylate 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, n-octyl acrylate, one or more of n-octyl methacrylate, n-decyl acrylate, n-decyl methacrylate, 2-hydroxyethyl methacrylate, benzyl methacrylate, styrene, α-methylstyrene, N-vinyl-2-pyrrolidone, glycidyl (meth) acrylate, Examples thereof include acrylic acid, methacrylic acid, dimer of acrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, vinyl acetic acid, and acid anhydrides thereof. In the present invention, commercially available polymers can also be used. For example, Aronix M-5600 (manufactured by Toagosei Co., Ltd.), Aronix M-6200 (manufactured by Toagosei Co., Ltd.), Aronix M-7100 (manufactured by Toagosei Co., Ltd.) And Aronix M-9050 (manufactured by Toagosei Co., Ltd.) are preferable. In a preferred embodiment, the content of the polymer is 5% by mass to 80% by mass with respect to the total mass of the colored layer forming composition.

  The monomer component is not particularly limited as long as the colored layer for the pixel portion and the colored layer for the spacer can be formed with a predetermined film thickness, and is used for a colored layer of a general color filter. Among them, a monomer component that can increase the lamination efficiency of the colored layer forming composition is preferable. Examples of such monomer components include allyl acrylate, benzyl acrylate, butoxyethyl acrylate, butoxyethylene glycol acrylate, cyclohexyl acrylate, dicyclopentanyl acrylate, 2-ethylhexyl acrylate, glycerol acrylate, glycidyl acrylate, and 2-hydroxyethyl acrylate. 2-hydroxypropyl acrylate, isobornyl acrylate, isodexyl acrylate, isooctyl acrylate, lauryl acrylate, 2-methoxyethyl acrylate, methoxyethylene glycol acrylate, phenoxyethyl acrylate, stearyl acrylate, ethylene glycol diacrylate, diethylene glycol diacrylate 1,4-pig Diol diacrylate, 1,5-pentanediol diacrylate, 1,6-hexanediol diacrylate, 1,3-propanediol acrylate, 1,4-cyclohexanediol diacrylate, 2,2-dimethylolpropane diacrylate, glycerol Diacrylate, tripropylene glycol diacrylate, glycerol triacrylate, trimethylolpropane triacrylate, polyoxyethylated trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, triethylene glycol diacrylate, polyoxypropyltrimethylol Propane triacrylate, butylene glycol diacrylate, 1,2,4-butanetriol Reacrylate, 2,2,4-trimethyl-1,3-pentanediol diacrylate, diallyl fumarate, 1,10-decanediol dimethyl acrylate, dipentaerythritol hexaacrylate, dipentaerythritol pentaacrylate, and the above acrylate Substituted with a methacrylate group, γ-methacryloxypropyltrimethoxysilane, 1-vinyl-2-pyrrolidone, 2-hydroxyethylacryloyl phosphate, tetrahydrofurfuryl acrylate, dicyclopentenyl acrylate, dicyclopentenyloxyethyl acrylate 3-butanediol diacrylate, neopentyl glycol diacrylate, polyethylene glycol diacrylate, hydroxypivalate ester Pentyl glycol diacrylate, phenol-ethylene oxide modified acrylate, phenol-propylene oxide modified acrylate, N-vinyl-2-pyrrolidone, bisphenol A-ethylene oxide modified diacrylate, pentaerythritol diacrylate monostearate, tetraethylene glycol diacrylate, Acrylates such as polypropylene glycol diacrylate, trimethylolpropane propylene oxide modified triacrylate, isocyanuric acid ethylene oxide modified triacrylate, trimethylolpropane ethylene oxide modified triacrylate, pentaerythritol pentaacrylate, pentaerythritol hexaacrylate, pentaerythritol tetraacrylate Mo And those obtained by substituting these acrylate groups with methacrylate groups, urethane acrylate oligomers in which an acrylate group is bonded to an oligomer having a polyurethane structure, polyester acrylate oligomers in which an acrylate group is bonded to an oligomer having a polyester structure, and epoxy groups An epoxy acrylate oligomer in which an acrylate group is bonded to an oligomer having an epoxy group, a urethane methacrylate oligomer in which a methacrylate group is bonded to an oligomer having a polyurethane structure, a polyester methacrylate oligomer in which a methacrylate group is bonded to an oligomer having a polyester structure, and an epoxy group Epoxy methacrylate oligomers with methacrylate groups bonded to oligomers, polymers with acrylate groups Examples thereof include a urethane acrylate, a polyester acrylate having an acrylate group, an epoxy acrylate resin having an acrylate group, a polyurethane methacrylate having a methacrylate group, a polyester methacrylate having a methacrylate group, and an epoxy methacrylate resin having a methacrylate group. In the present invention, commercially available monomers can also be used. For example, SR399 (manufactured by Sartomer), Aronix M-400 (manufactured by Toagosei Co., Ltd.), and Aronix M-450 (manufactured by Toagosei Co., Ltd.) are preferable. In a preferred embodiment, the monomer content is 5% by mass to 80% by mass with respect to the total mass of the colored layer forming composition.

  The colorant is used for forming a color layer for a plurality of colors of pixel portions, and usually three colorants of red, green, and blue are used. The colorant is not particularly limited as long as the color layer for the pixel portion and the color layer for the spacer can be formed with a predetermined thickness, and is used for a color layer of a general color filter. Although it can be the same as that of what is obtained, it is preferable that it is a coloring agent which can make the lamination | stacking efficiency of the said composition for colored layer formation high. Examples of such a coloring agent include pigment red 254 and / or pigment red 242 as a coloring agent used in the composition for forming a red coloring layer, and preferably include pigment yellow 150 and / or pigment yellow 138. As a coloring agent used in the composition for forming a green coloring layer, pigment green 58 is included, and preferably pigment yellow 150 and / or pigment yellow 138 is included. The colorant used in the blue colored layer forming composition includes at least one selected from the group consisting of Pigment Blue 15: 1, Pigment Blue 15: 3, and Pigment Blue 15: 6, preferably Pigment Violet 23. Is included. By using these colorants, the transmittance of the colored layer for the pixel portion can be improved and the luminance can be improved. Other known colorants may be mixed. In a preferable aspect, content of a coloring agent is 0.1 mass%-20 mass% with respect to the total mass of the composition for colored layer formation.

  The reaction initiator is not particularly limited as long as it can form the pixel portion coloring layer and the spacer coloring layer with a predetermined film thickness. Although it can be the same as what is used, it is preferable that it is especially a reaction initiator which can make the lamination | stacking efficiency of the said composition for colored layer formation high. As such a reaction initiator, a thermal polymerization initiator and a photopolymerization initiator can be used. For example, benzyl (also called bibenzoyl), benzoin isobutyl ether, benzoin isopropyl ether, benzophenone, benzoyl benzoic acid, benzoyl benzoate Methyl acid, 4-benzoyl-4′-methyldiphenyl sulfide, benzylmethyl ketal, dimethylaminomethylbenzoate, 2-n-butoxyethyl-4-dimethylaminobenzoate, isoamyl p-dimethylaminobenzoate, 3,3′-dimethyl -4-methoxybenzophenone, methylobenzoyl formate, 2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4 -Morpho Nophenyl) -butan-1-one, 1- (4-dodecylphenyl) -2hydroxy-2-methylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropane-1 -One, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 2-chlorothioxanthone, 2,4-diethylthioxanthone, 2,4-diisopropylthioxanthone, 2,4-dimethylthioxanthone , Isopropylthioxanthone, 1-chloro-4-propoxythioxanthone, and the like. In the present invention, a commercially available polymerization initiator can also be used. For example, Irgacure 184, Irgacure 369, Irgacure 651, Irgacure 907 (all are manufactured by Ciba Specialty Chemicals), Darocur (Merck) Ketone compounds such as ADEKA 1717 (Asahi Denka Kogyo Co., Ltd.), and 2,2′-bis (o-chlorophenyl) -4,5,4′-tetraphenyl-1,2′biimidazole (Kurokin Kasei Co., Ltd.) Biimidazole compounds such as those manufactured by the company are preferred. In a preferred embodiment, the content of the polymerization initiator is 1% by mass to 40% by mass with respect to the total mass of the colored layer forming composition.

  In addition to the above components, the colored layer forming composition may contain, for example, various additives such as a surfactant and a crosslinking agent.

(C) Pixel part colored layer As the thickness of the pixel part colored layer used in the present invention, when the color filter of the present invention is used in a transmissive liquid crystal display device, a good image display can be performed. And, it is not particularly limited as long as the laminated spacers formed simultaneously can have a sufficient height, but within the range of 0.5 μm to 10 μm, especially within the range of 1 μm to 9 μm, It is preferably in the range of 2 μm to 8 μm. If the thickness of the colored layer for the pixel portion is less than the above range, it is difficult to make the stacked spacer formed simultaneously with the colored layer for the pixel portion sufficiently high. This is because, when the thickness of the layer exceeds the above range, it is difficult to form a thin-film transmissive liquid crystal display device that has been increasingly demanded in recent years. In addition, the thickness of the said pixel part colored layer here points out the colored layer for pixel parts in which the said chromaticity adjustment process is not performed.

The chromaticity of the color layer for the pixel portion may be such that chromaticity is such that good image display can be performed when the color filter of the present invention is used in a transmissive liquid crystal display device. There is no particular limitation.
Specifically, as the chromaticity, the chromaticity of the red pixel portion coloring layer is such that the x value is in the range of 0.400 to 0.800, the y value is in the range of 0.150 to 0.650, In particular, the x value is in the range of 0.450 to 0.800, the y value is in the range of 0.150 to 0.600, particularly the x value is in the range of 0.500 to 0.800, and the y value is 0.00. It is preferable to be within the range of 150 to 0.550.
The chromaticity of the green pixel portion coloring layer is such that the x value is in the range of 0.100 to 0.600, the y value is in the range of 0.200 to 0.800, and in particular, the x value is 0.100. In the range of .about.0.550, y value in the range of 0.250 to 0.750, especially in the range of x value of 0.100 to 0.500, y value in the range of 0.300 to 0.700. It is preferable that
The chromaticity of the blue pixel portion coloring layer is such that the x value is in the range of 0.010 to 0.500, the y value is in the range of 0.010 to 0.500, and in particular, the x value is 0.010. In the range of ~ 0.450, y value in the range of 0.010 to 0.450, especially in the range of x value of 0.010 to 0.400, y value in the range of 0.010 to 0.300. It is preferable that
When the chromaticity of the colored layer for the pixel portion is less than the above range or exceeds the above range, it is difficult to display a good image when the color filter of the present invention is used in a transmissive liquid crystal display device. Because it becomes. The chromaticity of the pixel portion coloring layer indicates the chromaticity of the entire pixel portion coloring layer formed in the opening of the light shielding portion.

  The luminance of the colored layer for the pixel portion is particularly limited as long as it can achieve a satisfactory image display when the color filter of the present invention is used in a transmissive liquid crystal display device. It is not a thing. Specifically, it is preferable that the Y value of the red colored layer is in the range of 10 to 50, in particular, the Y value is in the range of 10 to 45, and particularly the Y value is in the range of 10 to 40. The Y value is in the range of 30 to 80, in particular, the Y value is in the range of 35 to 80, particularly the Y value is in the range of 40 to 80, and the Y value of the blue colored layer is in the range of 10 to 50. However, it is preferable that the Y value is in the range of 10 to 45, particularly the Y value is in the range of 10 to 40. When the luminance of the colored layer for the pixel portion is less than the above range or exceeds the above range, it is difficult to perform good image display when the color filter of the present invention is used in a transmissive liquid crystal display device. Because. The luminance of the pixel portion coloring layer refers to the luminance of the entire pixel portion coloring layer formed in the opening of the light shielding portion.

  In addition, the luminance at the time of white display using the color layer for the pixel portion can be set to such an extent that good image display can be performed when the color filter of the present invention is used in a transmissive liquid crystal display device. The Y value is in the range of 5 to 85, particularly the Y value is in the range of 5 to 80, and the Y value is preferably in the range of 5 to 75. . If the brightness at the time of white display is less than the above range or exceeds the above range, it is difficult to perform good image display when the color filter of the present invention is used in a transmissive liquid crystal display device. is there. In addition, the brightness | luminance at the time of the said white display points out the brightness | luminance at the time of performing white display using the whole coloring layer for pixel parts formed in the opening part of the said light shielding part.

  The chromaticity and luminance of the colored layer for the pixel portion are values measured using a spectral altimeter: OSP-SP200 (manufactured by Olympus), and the backlight is measured using a C light source.

(2) Pixel part The pattern of the pixel part used in the present invention is not particularly limited as long as it can perform image display when the transmission type display device is assembled using the color filter of the present invention. It can be the same as the pattern of the pixel portion used for a general color filter, and it should be a known arrangement such as a stripe type, a mosaic type, a triangle type, or a four pixel arrangement type. Can do.

  The area ratio of the pixel portion in the color filter of the present invention (the aperture ratio of the opening of the light-shielding portion) is such that a good image display can be performed by the transmissive liquid crystal display device using the color filter of the present invention. There is no particular limitation as long as it is present, and it can be appropriately selected depending on the use of the transmissive liquid crystal display device. In the present invention, the area ratio of the pixel portion is preferably in the range of 1% to 90%, more preferably in the range of 1% to 85%, and particularly preferably in the range of 1% to 80%. If the area ratio of the pixel portion is less than the above range, it is difficult to perform good image display when the color filter is used in a transmissive liquid crystal display device. This is because it is difficult to manufacture a color filter whose ratio exceeds the above range.

2. Next, the light shielding part used in the present invention will be described. The light shielding part is formed on the transparent substrate and has an opening.

The line width of the light-shielding portion is not particularly limited as long as the pixel portion can be defined and a columnar spacer described later can be formed. In the present invention, in order to improve the luminance of the transmissive liquid crystal display device, it is preferable to widen the opening of the light-shielding portion. Therefore, the line width of the light-shielding portion is preferably smaller.
The line width of the light shielding part is preferably in the range of 1 μm to 30 μm, more preferably in the range of 1 μm to 15 μm, and particularly preferably in the range of 1 μm to 10 μm. In the present invention, even when the light shielding portion is thinned, it is possible to form a laminated spacer having a sufficient height. When the line width is within the above range, the effects of the present invention can be exhibited more greatly.

  As the light shielding portion used in the present invention, one in which pixel portions having the same shape are formed in a pattern at regular intervals is usually used.

  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 CrOx film (x is an arbitrary number) and a laminate of two Cr films, and a CrOx film (x is an arbitrary number) with reduced reflectance, CrNy A film (y is an arbitrary number) and three layers of Cr films 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 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 forming a light-shielding part containing a black colorant and a photosensitive resin, and further a sensitizer, a coating property improver, if necessary. A development improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, and the like may be added.

  On the other hand, when the 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.

3. Next, the laminated spacer used in the present invention will be described.
The laminated spacer used in the present invention is formed on the above-described light-shielding portion. When the color filter of the present invention is used in a transmissive liquid crystal display device, the thickness (cell gap) of the liquid crystal layer is kept constant. It has a function to keep. The laminated spacer is formed by laminating a plurality of colored layers for spacers.

  The colored layer for spacer of the present invention is composed of the same composition for forming a colored layer as the above-described colored layer for pixel portion. The spacer colored layer is usually formed at the same time as the above-described pixel portion colored layer when the color filter is manufactured.

  About the shape and thickness of the said colored layer for spacers, it selects suitably by the shape and height of a lamination | stacking spacer. Further, the order of stacking the colored layers for spacers is not particularly limited as long as it is an order in which stacked spacers having a predetermined height can be formed. It is to be decided.

  The colored layer forming composition can be the same as that described in the section “1. Pixel section” described above, and thus the description thereof is omitted here.

  The shape of the laminated spacer used in the present invention is not particularly limited as long as the cell gap can be kept constant when the color filter of the present invention is used in a transmissive liquid crystal display device. . Specifically, examples of the shape of the laminated spacer include a cylindrical shape and a prismatic shape.

  Further, the position at which the laminated spacer is formed is not particularly limited as long as it is formed on at least the light shielding part. Depending on the use of the color filter of the present invention, the position other than the light shielding part is not limited. May also be formed. As such a formation position, for example, just above the transparent substrate can be cited.

  The size of the bottom surface of the laminated spacer is appropriately selected depending on the size (area) of the light shielding portion, the size of the color filter, and the like.

  Further, the height of the laminated spacer is preferably about the same as the cell gap when the color filter of the present invention is used in a transmissive liquid crystal display device. Specifically, the height of the laminated spacer is preferably about 0.5 μm to 13 μm, more preferably in the range of 1 μm to 8 μm.

  The number of laminated spacers is not particularly limited as long as the cell gap can be kept constant when the color filter of the present invention is used in a transmissive liquid crystal display device. It is appropriately selected depending on the size of the filter.

  As the number of stacked spacers, when the color filter of the present invention is used in a transmissive liquid crystal display device, the stacked spacers have a height that can maintain a constant cell gap. Although it is not particularly limited as long as it is possible, it is usually formed in the same number as the number of colors of the color layers for the pixel portions of a plurality of colors.

4). Transparent substrate Next, the transparent substrate used in the present invention will be described. The transparent substrate used in the present invention is one in which the light shielding part and the colored layer for the pixel part are formed.

  The transparent substrate used in the present invention is not particularly limited as long as it is a substrate transparent to visible light, and a transparent substrate used for a general color filter can be used. Specific examples include inflexible transparent rigid materials such as quartz glass, alkali-free glass, and synthetic quartz plates, or transparent flexible materials having flexibility such as transparent resin films and optical resin plates. It is done.

  Although the thickness of a transparent substrate is not specifically limited, According to the use of the color filter manufactured by this invention, the thing of about 100 micrometers-1 mm can be used, for example.

5. Other Members The color filter of the present invention is not particularly limited as long as it has the above-described pixel portion, light shielding portion, laminated spacer, and transparent substrate, and necessary members can be added as appropriate. Examples of such a member include an overcoat layer formed so as to cover the pixel portion, the light shielding portion, and the laminated spacer. Since the overcoat layer can be the same as that used for a general color filter, the description thereof is omitted here.

6). Method for Producing Color Filter As a method for producing the color filter of the present invention, a chromaticity adjustment process in which the laminated spacer has a sufficient height and can provide chromaticity and brightness sufficient to perform good image display. If the color filter which has the colored layer for pixel parts to which was given can be manufactured, it will not specifically limit.
As a manufacturing method of such a color filter, the following manufacturing method can be mentioned as an example. First, after patterning a light shielding part on a transparent substrate, a colored layer forming coating solution containing the composition for forming a colored layer is applied to the entire transparent substrate on which the light shielding part is formed with a predetermined thickness. To form a colored layer forming layer. Next, by exposing and developing using a photomask, a colored layer for pixel portion subjected to chromaticity adjustment processing is formed in the opening portion of the light shielding portion, and a predetermined thickness is formed on the light shielding portion. A color filter is manufactured by forming a colored layer for spacers having the following.

B. Transmission type liquid crystal display device The transmission type liquid crystal display device of the present invention includes a color filter described in the section “A. Color filter for transmission type liquid crystal display device”, a counter substrate, and the color filter and the counter substrate. And a liquid crystal layer provided.

According to the present invention, since the color filter has a laminated spacer having a sufficient height, the cell gap of the transmissive liquid crystal display device of the present invention can be made constant, and a high-quality transmissive type. A liquid crystal display device can be obtained.
In addition, since the pixel portion of the color filter is formed with a color layer for pixel portion that has been subjected to chromaticity adjustment processing, a transmissive liquid crystal display device that performs good image display can be obtained.
Hereinafter, each configuration used in the transmission type liquid crystal display device of the present invention will be described.

1. Color Filter Since the color filter used in the present invention has been described in the section “A. Color Filter”, description thereof is omitted here.

2. Next, the counter substrate used in the present invention will be described.

  The counter substrate used in the present invention can be appropriately selected and used according to the driving method of the transmission type liquid crystal display device in the present invention.

  Here, the driving method of the transmissive liquid crystal display device according to the present invention is not particularly limited as long as a good image display can be performed. The driving method generally used in the transmissive liquid crystal display device is used. A scheme can be adopted. Examples of such a drive method include a TN method, an IPS method, an OCB method, and an MVA method. In the present invention, any of these methods can be preferably used.

3. Liquid Crystal Layer Next, the liquid crystal layer will be described. The liquid crystal layer in the present invention is provided between the color filter and the counter substrate. As the liquid crystal constituting the liquid crystal layer, various liquid crystals having different dielectric anisotropy and mixtures thereof can be used according to the driving method of the transmission type liquid crystal display device of the present invention.

As a method for forming the liquid crystal layer, a method generally used as a method for manufacturing a liquid crystal cell can be used. Examples thereof include a vacuum injection method and a liquid crystal dropping method.
In the vacuum injection method, for example, a liquid crystal cell is prepared in advance using a color filter and a counter substrate, and the liquid crystal is heated to obtain an isotropic liquid, and the liquid crystal is applied to the liquid crystal cell using the capillary effect. The liquid crystal layer can be formed by injecting in this state and sealing with an adhesive. Thereafter, the sealed liquid crystal can be aligned by slowly cooling the liquid crystal cell to room temperature.
In the liquid crystal dropping method, for example, a sealant is applied to the periphery of the color filter, the color filter is heated to a temperature at which the liquid crystal becomes isotropic, and the liquid crystal is dropped in an isotropic liquid state using a dispenser or the like. Then, the color filter and the counter substrate are overlapped with each other under a reduced pressure, and bonded through a sealant, whereby a liquid crystal layer can be formed. Thereafter, the sealed liquid crystal can be aligned by slowly cooling the liquid crystal cell to room temperature.

4). Other Configurations The transmissive liquid crystal display device according to the present invention usually includes the color filter, the counter substrate, and the liquid crystal layer. However, the present invention is not limited to such a configuration and is generally used. A transmissive liquid crystal display device in which a color filter is used can be used as a known configuration.

  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 described with reference to examples and comparative examples.

[Example 1]
(Preparation of copolymer resin solution)
In a polymerization tank, 63 parts by mass of methyl methacrylate (MMA), 12 parts by mass of acrylic acid (AA), 6 parts by mass of 2-hydroxyethyl methacrylate (HEMA), and 88 parts by mass of diethylene glycol dimethyl ether (DMDG) are charged. After stirring and dissolving, 7 parts by mass of 2,2′-azobis (2-methylbutyronitrile) was added and dissolved uniformly. Then, it stirred at 85 degreeC under nitrogen stream for 2 hours, and also was made to react at 100 degreeC for 1 hour. Further, 7 parts by mass of glycidyl methacrylate (GMA), 0.4 parts by mass of triethylamine, and 0.2 parts by mass 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 ( A solid content of 50%) was obtained.

(Preparation of curable resin composition)
Next, the following materials were stirred and mixed at room temperature to obtain a curable resin composition.
<Composition of curable resin composition>
-16 parts by mass of the above copolymer resin solution (solid content 50%)-Dipentaerythritol pentaacrylate (Sartomer SR399)
24 parts by mass-orthocresol novolac-type epoxy resin (Oka Shell Epoxy Co., Epicoat 180S70) 4 parts by mass-2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one
4 parts by mass, 52 parts by mass of diethylene glycol dimethyl ether

(Formation of light shielding part)
First, the following components were mixed and sufficiently dispersed in a sand mill to prepare a black pigment dispersion.
<Composition of black pigment dispersion>
-Black pigment 23 parts by mass-Polymer dispersant (Big Chemie Japan Co., Ltd. Disperbyk 111) 2 parts by mass-Solvent (diethylene glycol dimethyl ether) 75 parts by mass

Next, the following components were sufficiently mixed to obtain a light shielding part composition.
<Composition of composition for light shielding part>
-61 parts by mass of the black pigment dispersion-20 parts by mass of the curable resin composition-30 parts by mass of diethylene glycol dimethyl ether

  The light shielding part composition was applied on a glass substrate (Asahi Glass Co., Ltd. AN material) having a thickness of 1.1 mm as a transparent substrate with a spin coater, dried at 100 ° C. for 3 minutes, and a light shielding part having a thickness of about 2.4 μm. A forming layer was formed. The light-shielding part forming layer is exposed to a light-shielding pattern with an ultra-high pressure mercury lamp, and then developed with a 0.05 wt% potassium hydroxide aqueous solution, and then the substrate is left to stand in an atmosphere at 230 ° C. for 30 minutes for heat treatment. As a result, a light shielding portion having a line width of 30 μm and a thickness of 2.0 μm was formed.

(Formation of colored layer)
On the transparent substrate on which the light-shielding part is formed as described above, a red colored layer forming coating solution having the following composition is applied by spin coating (thickness after application: about 8.5 μm), and then in an oven at 80 ° C. And dried for 3 minutes to obtain a red colored layer forming layer. Next, a photomask was placed and irradiated with ultraviolet rays for 10 seconds only on the region corresponding to the red colored layer forming region using a 2.0 kW ultra high pressure mercury lamp by a proximity aligner. 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 red colored layer forming layer. Thereafter, the transparent substrate is left to stand in an atmosphere of 230 ° C. for 30 minutes to perform heat treatment, and the opening of the light shielding part has a line width of 50 μm, a thickness of 6.8 μm, and the opening part area ratio of the colored layer for the pixel part. A red pixel portion colored layer having a through-hole having a size of 0.1 was formed. A red spacer coloring layer having an area of 8827 μm ² and a thickness of 6.66 μm was formed on the light shielding portion.

Next, using the green colored layer forming coating liquid having the following composition, a green pixel portion colored layer was formed in the opening of the light shielding portion in the same manner as the red pixel portion colored layer. A green spacer coloring layer having an area of 8036 μm ² and a thickness of 3.01 μm was formed on the red spacer coloring layer.

Further, using the blue colored layer forming coating liquid having the following composition, a blue pixel portion colored layer was formed in the opening of the light shielding portion in the same manner as the red pixel portion colored layer. A green spacer coloring layer having an area of 1017 μm ² and a thickness of 2.25 μm was formed on the green medium-small coloring layer. Thereby, a color filter was obtained.

<Composition of red colored layer forming coating solution>
・ CI Pigment Red 177 (Chromofine Red 6605, manufactured by Dainichi Seika Kogyo Co., Ltd.)
10 parts by mass, polysulfonic acid type polymer dispersant 3 parts by mass, curable resin composition 5 parts by mass, and 3-methoxybutyl acetate 82 parts by mass

<Composition of green colored layer forming coating solution>
・ CI Pigment Green 36 (Heliogen Green D9360, manufactured by BASF)
10 parts by mass, polysulfonic acid type polymer dispersant 3 parts by mass, curable resin composition 5 parts by mass, and 3-methoxybutyl acetate 82 parts by mass

<Composition of blue colored layer forming coating solution>
・ CI Pigment Blue 15: 6 (Fastogen Blue EP-7, manufactured by DIC)
10 parts by mass, polysulfonic acid type polymer dispersant 3 parts by mass, curable resin composition 5 parts by mass, and 3-methoxybutyl acetate 82 parts by mass

[Example 2]
A color filter was produced in the same manner as in Example 1 except that the photomask was changed to form a pixel portion coloring layer having a through-hole with an aperture area ratio of 0.2 in the pixel portion coloring layer.

[Example 3]
Change the coating thickness of the colored layer forming coating solution and the photomask to form a colored layer for the pixel portion having a concavo-convex forming process (a step of the rugged portion is 0.125 μm) on the surface of the colored layer for the pixel portion. A color filter having the same chromaticity as the color filter of Example 1 was produced in the same manner as Example 1 except that.

[Comparative Example 1]
A color filter was obtained in the same manner as in Example 1 except that the photomask was changed to form a colored layer for a pixel portion having no opening.

[Evaluation]
The chromaticity and luminance of the obtained colored layer for the pixel portion were measured. The results are shown in Table 1.
In addition, it performed using spectroscopic altimeter: OSP-SP200 (made by Olympus), and the backlight is the value measured using C light source. In Table 1, the brightness during white display is indicated by White Y.

The color filters of Examples 1 to 3 that were subjected to chromaticity adjustment processing were able to have higher luminance than the color filters of Comparative Example 1 that were not subjected to chromaticity adjustment processing.
Further, since the color filter of Example 3 subjected to the unevenness forming process has higher luminance than the color filters of Example 1 and Example 2 subjected to the opening forming process, the colored layers of the respective colors of the color filter Is equivalent to the chromaticity, it is considered that the brightness can be increased by performing the unevenness forming process rather than performing the opening forming process.

DESCRIPTION OF SYMBOLS 1 ... Transparent substrate 2 ... Light-shielding part 3 ... Pixel part 3R ... Red pixel part colored layer 3G ... Green pixel part colored layer 3B ... Blue pixel part colored layer 4 ... Laminated spacer 4R ... Red spacer colored layer 4G ... Green Colored layer for spacer 4B ... Colored layer for blue spacer 10 ... Color filter

Claims (4)

A transparent substrate;
A light shielding portion formed on the transparent substrate;
A pixel portion formed in an opening defined by the light-shielding portion and having a color layer for a plurality of colors of pixel portions;
A color for a transmissive liquid crystal display device, which is formed on the light-shielding portion and is formed by laminating a plurality of colored layers for spacers, and having a multilayer spacer that functions as a columnar spacer that directly defines a cell gap in the transmissive liquid crystal display device. A filter,
A color filter for a transmissive liquid crystal display device, wherein a chromaticity adjustment process for adjusting the chromaticity of the pixel portion coloring layer is applied to at least one color of the pixel portion coloring layer . 2. The color filter for a transmissive liquid crystal display device according to claim 1, wherein the chromaticity adjustment process is an opening forming process in which an opening is provided in at least a part of the colored layer for the pixel portion. 3. The color filter for a transmissive liquid crystal display device according to claim 1, wherein the chromaticity adjustment process is a concavo-convex forming process in which concavo-convex is provided on at least a part of the colored layer surface for the pixel portion. . A transparent substrate, a light shielding portion formed on the transparent substrate, a pixel portion having a colored layer for a plurality of pixel portions formed in an opening defined by the light shielding portion, and a plurality of light shielding portions formed on the light shielding portion. A chromaticity adjustment process for adjusting the chromaticity of the pixel portion coloring layer is included in the pixel portion coloring layer having at least one color. The color filter being applied,
A counter substrate;
A transmissive liquid crystal display device comprising: the color filter; and a liquid crystal layer provided between the counter substrate.

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