JP2009186990A - Color filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color filter which is manufactured by a simple step and is not shortcircuited to an electrode of a TFT substrate. <P>SOLUTION: In the color filter 1, a black matrix 5 is provided on a substrate 3, and a blue pixel 7 and a red pixel 9 are provided on the substrate 3 and the black matrix 5. A spacer forming red pixel 10 is provided on the blue pixel 7 at a part where the black matrix 5 and the blue pixel 7 are layered. A transparent electrode layer 15 is provided on the substrate 3, the black matrix 5, the blue pixel 7, the red pixel 9 and the spacer forming red pixel 10 and a green pixel 11 and a spacer forming green pixel 12 are provided on the transparent electrode layer 15. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a color filter used in a liquid crystal display device.

  In a liquid crystal display device, a spherical spacer generally called a bead spacer has been used as a spacer for the purpose of maintaining a cell gap between a color filter and a thin film transistor (TFT) substrate. However, the position of this bead spacer is not fixed and is also present in the display area of the liquid crystal display device. Therefore, the display quality of the liquid crystal display device is affected by the scattering and transmission of light by the bead spacer and the disorder in the orientation near the bead spacer. Has the problem of lowering. For this reason, the limitations of conventional spherical spacers are pointed out, and columnar spacers that can be arranged and formed in a fixed position are attracting attention.

  Therefore, a columnar spacer is formed by forming a photosensitive resin layer after forming a transparent electrode layer, exposing it using a photomask, and performing patterning (for example, refer to Patent Document 1).

  In addition, with the recent drop in the price of liquid crystal display devices, there is an increasing demand for cost reduction in the color filter that is a component. Therefore, it is considered that a columnar spacer is produced by stacking colored pixels to form a columnar spacer, omitting an independent spacer production step.

JP 2001-324716 A

  However, when the columnar spacer is formed by stacking the colored pixels, if the transparent electrode layer is formed after the colored pixel is formed, the transparent electrode layer is exposed on the columnar spacer, and the electrode of the color filter and the electrode of the TFT substrate are There was a problem of short circuit.

  If the electrode of the color filter and the electrode of the TFT substrate are short-circuited, no voltage is applied to the liquid crystal molecules filled between the color filter and the TFT substrate, and the liquid crystal display device cannot be driven.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a color filter that is manufactured by a simple process and does not short-circuit with an electrode of a TFT substrate.

  In order to achieve the above-described object, the first invention includes a substrate, a black matrix formed on the substrate, a colored pixel and a transparent electrode layer on the substrate and the black matrix. A color filter comprising a spacer made of the colored pixels and the colored pixels of one or more colors on the transparent electrode layer.

  Moreover, it is preferable to have a protective layer on the said transparent electrode layer, the said colored pixel, and the said spacer.

  According to a second aspect of the invention, there is provided a substrate, a black matrix formed on the substrate, a first colored pixel formed on the substrate and the black matrix, and formed on the substrate and the black matrix. The second colored pixel formed, the first colored pixel for spacer formation formed on the first colored pixel, and the first colored pixel for spacer formation formed at a position where the black matrix and the first colored pixel are laminated. A transparent electrode layer formed on the black matrix, the first colored pixel, the second colored pixel, and the first spacer-forming colored pixel, on the transparent electrode layer, A third colored pixel formed at a position corresponding to the substrate and the black matrix; and a position corresponding to the first colored pixel for spacer formation on the transparent electrode layer. A second spacer for forming colored pixels was made, a color filter characterized in that it comprises a.

  Moreover, it is desirable to have a protective layer on the transparent electrode layer, the third colored pixel, and the second spacer forming colored pixel.

  According to a third aspect of the present invention, there is provided a substrate, a black matrix formed on the substrate, a first colored pixel formed on the substrate and the black matrix, the substrate, the black matrix, and the first A transparent electrode layer formed on the colored pixel, a second colored pixel formed on the transparent electrode layer at a location corresponding to the substrate and the black matrix, and the transparent electrode layer. The first spacer-forming colored pixel formed at a position where the black matrix and the first colored pixel are laminated on the transparent electrode layer, and on the substrate and the black matrix A third colored pixel formed at a corresponding position; and a second colored pixel for spacer formation formed on the first colored pixel for spacer formation. Is a color filter which is characterized.

  In addition, a protective layer may be provided on the transparent electrode layer, the second colored pixel, the first spacer forming colored pixel, the third colored pixel, and the second spacer forming colored pixel. desirable.

  The first colored pixel is preferably a blue pixel.

  The fourth invention includes a step (a) of forming a black matrix on a substrate, a step (b) of forming one or more colored pixels on the substrate and the black matrix, the substrate, A step (c) of forming a transparent electrode layer on the black matrix and the colored pixel, and a step (d) of forming a colored pixel of one or more colors on the transparent electrode layer, A part of the colored pixels is laminated through the transparent electrode layer to form a spacer.

  In addition, it is preferable that after the step (d), a step (e) of forming a protective layer on the transparent electrode layer, the colored pixel, and the spacer is provided.

  The fifth invention includes a step (a) of forming a black matrix on a substrate, a step (b) of forming a first colored pixel on the substrate and the black matrix, and the substrate and the black matrix. (C) forming a second colored pixel on the first colored pixel, and a first spacer-forming colored color on the first colored pixel, where the black matrix and the first colored pixel are stacked. A step (d) of forming a pixel, and a step of forming a transparent electrode layer on the substrate, the black matrix, the first colored pixel, the second colored pixel, and the first spacer-formed colored pixel (E), a step (f) of forming a third colored pixel on the transparent electrode layer at a position corresponding to the substrate and the black matrix, and on the transparent electrode layer, in front A step (g) of forming a second spacer-forming colored pixel at a location corresponding to the first spacer-forming colored pixel, and the step (c) and the step (d) are performed simultaneously. The method for producing a color filter, wherein the step (f) and the step (g) are performed simultaneously.

  In addition, after the step (g), a step (h) of forming a protective layer on the transparent electrode layer, the third colored pixel, and the second spacer-forming colored pixel is provided. Is desirable.

  The sixth invention includes a step (a) of forming a black matrix on a substrate, a step (b) of forming a first colored pixel on the substrate and the black matrix, the substrate, and the black matrix. And (c) forming a transparent electrode layer on the first colored pixel, and forming a second colored pixel on the transparent electrode layer at a location corresponding to the substrate and the black matrix. Step (d), forming a first spacer-forming colored pixel on the transparent electrode layer where the black matrix and the first colored pixel are laminated, and A step (f) of forming a third colored pixel on the transparent electrode layer at a position corresponding to the substrate and the black matrix; and a second spacer on the first spacer-forming colored pixel. A step (g) of forming a colored pixel for forming a sensor, wherein the step (d) and the step (e) are performed simultaneously, and the step (f) and the step (g) are performed simultaneously. A method for manufacturing a color filter.

  After the step (g), on the transparent electrode layer, the second colored pixel, the first spacer forming colored pixel, the third colored pixel, and the second spacer forming colored pixel, And (h) forming a protective layer.

  The first colored pixel is preferably a blue pixel.

  According to the present invention, it is possible to provide a color filter that is manufactured by a simple process and does not short-circuit with the electrode of the TFT substrate.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The color filter 1 according to the first embodiment will be described.
FIG. 1 is a diagram showing a color filter 1. The color filter 1 has a black matrix 5 on a substrate 3, and has blue pixels 7 and red pixels 9 on the substrate 3 and the black matrix 5. On the blue pixel 7 where the black matrix 5 and the blue pixel 7 are stacked, the spacer forming red pixel 10 is provided. Further, a transparent electrode layer 15 is provided on the substrate 3, the black matrix 5, the blue pixel 7, the red pixel 9, and the spacer forming red pixel 10, and the green pixel 11 and the spacer forming green pixel are provided on the transparent electrode layer 15. Twelve.

  As the substrate 3, a substrate generally used for a color filter can be used. For example, non-flexible transparent rigid materials such as borosilicate glass, aluminoborosilicate glass, alkali-free glass, quartz glass, synthetic quartz glass, soda lime glass, white sapphire, transparent resin film, optical resin film, etc. A transparent flexible material having the following flexibility can be used. As the flexible material, acrylic such as polymethyl methacrylate, polyamide, polyacetal, polybutylene terephthalate, polyethylene terephthalate, polyethylene naphthalate, triacetyl cellulose, syndiotactic polystyrene, polyphenylene sulfide, polyether ketone, polyether ether ketone, Fluorine resin, polyether nitrile, polycarbonate, modified polyphenylene ether, polycyclohexene, polynorbornene resin, polysulfone, polyethersulfone, polyarylate, polyamideimide, polyetherimide, thermoplastic polyimide, etc. can be mentioned. However, those made of general plastics can also be used. In particular, alkali-free glass is a material having a low coefficient of thermal expansion, and is excellent in dimensional stability and characteristics in high-temperature heat treatment.

  The black matrix 5 includes a plurality of openings, is formed so that light that does not pass through the colored pixels does not pass through the color filter 1, and preferably has an average transmittance of 0.1% or less. The black matrix 5 can be formed by forming a resin layer using a photosensitive resin composition containing a light shielding substance such as carbon fine particles and metal oxide, and patterning the resin layer. In this case, the thickness of the black matrix 5 is about 0.5 to 4 μm.

  As the light-shielding substance, a mixture of pigments such as red, blue, and green can be used in addition to metal oxide powder such as carbon black, titanium oxide, and iron tetroxide, metal sulfide powder, and metal powder.

  As the photosensitive resin composition, any of a negative photosensitive resin and a positive photosensitive resin can be used. In the present embodiment, description will be made using a negative photosensitive resin. In addition, the coloring of resin is not ask | required.

  The negative photosensitive resin is not particularly limited, and a commonly used negative photosensitive resin can be used. For example, a chemically amplified photosensitive resin based on a crosslinked resin, specifically, a chemically amplified photosensitive resin in which a crosslinking agent is added to polyvinylphenol and an acid generator is further added. In addition, as an acrylic negative photosensitive resin, a photopolymerization initiator that generates a radical component upon irradiation with ultraviolet rays, a component that has an acrylic group in the molecule, causes a polymerization reaction by the generated radical, and cures thereafter, What contains the functional group (for example, the component which has an acidic group in the case of image development by an alkaline solution) which can melt | dissolve an unexposed part by image development can be used. Among the above-mentioned components having an acrylic group, relatively low molecular weight polyfunctional acrylic molecules include dipentaerythritol hexaacrylate (DPHA), dipentaerythritol pentaacrylate (DPPA), tetramethylpentatriacrylate (TMPTA) and the like. Can be mentioned. Examples of the high molecular weight polyfunctional acrylic molecule include a polymer in which an acrylic group is introduced via an epoxy group into a part of the carboxylic acid group of the styrene-acrylic acid-benzyl methacrylate copolymer, and methyl methacrylate-styrene- An acrylic acid copolymer etc. are mentioned.

  Moreover, it does not specifically limit as positive type photosensitive resin, What is generally used can be used. Specifically, a chemically amplified photosensitive resin using a novolac resin as a base resin can be used.

  The black matrix 5 can also be formed by forming a metal thin film of chromium or the like by, for example, a sputtering method or a vacuum deposition method and patterning the metal thin film. In this case, the thickness of the black matrix 5 is about 5 to 500 nm.

  The blue pixel 7 is formed of a photosensitive resin composition containing a pigment such as a blue pigment. As the photosensitive resin composition, a transparent resin can be used among the same photosensitive resin compositions as the photosensitive resin composition used for the black matrix 5. The thickness of the blue pixel 7 is about 0.5 to 5 μm.

  The red pixel 9 and the red pixel 10 for spacer formation are formed of a photosensitive resin composition containing a pigment such as a red pigment, and the green pixel 11 and the green pixel 12 for spacer formation are photosensitive containing a pigment such as a green pigment. It is formed with a functional resin composition. As the photosensitive resin composition, the same photosensitive resin composition as the photosensitive resin composition used for the blue pixel 7 can be used.

  For the transparent electrode layer 15, a composite oxide called tin oxide, indium oxide, and ITO (Indium Tin Oxide) can be used. The thickness of the transparent electrode layer 15 is about 5 to 500 nm.

  The spacer 13 includes a spacer forming red pixel 10 formed on the blue pixel 7 and a spacer forming green pixel 12. The spacer 13 holds the distance between the color filter 1 and the TFT substrate. The height of the spacer 13 is about 1 to 5 μm.

  A method for manufacturing the color filter 1 according to the first embodiment will be described. FIG. 2 is a diagram illustrating a manufacturing process of the color filter 1.

  First, as shown in FIG. 2A, the black matrix 5 is formed on the substrate 3. The black matrix 5 can be formed by applying and patterning a photosensitive resin containing a light shielding material. Examples of the method for applying the photosensitive resin include spin coating, casting, dipping, bar coating, blade coating, roll coating, gravure coating, flexographic printing, spray coating, and die coating. .

  Next, ultraviolet rays are irradiated using a predetermined photomask, the portion to be the black matrix 5 is cured, and the uncured photosensitive resin in the portion not irradiated with the ultraviolet rays is dissolved and removed with a solvent, thereby removing the black matrix. 5 is formed.

  The black matrix 5 can also be formed by forming a metal thin film of chromium or the like by a sputtering method, a vacuum vapor deposition method or the like and patterning it. The patterning method is not particularly limited, but a lithography method is used.

  Next, as shown in FIG. 2B, blue pixels 7 are formed on the substrate 3 and the black matrix 5. The blue pixel 7 is formed by applying and patterning a photosensitive resin containing a pigment, and a coating method or a patterning method for forming the black matrix 5 using the photosensitive resin can be used.

Next, as shown in FIG. 2C, red pixels 9 are formed on the substrate 3 and the black matrix 5, and on the blue pixels 7 where the black matrix 5 and the blue pixels 7 are laminated. A red pixel 10 for forming a spacer is formed.
The red pixels 9 and the like are formed by applying and patterning a photosensitive resin containing a pigment, similarly to the formation of the blue pixels 7. The red pixels 9 are patterned in a frame bordered by the black matrix 5 so as not to overlap the blue pixels 7. Further, the spacer forming red pixel 10 is formed at a location where the black matrix 5 is present and light is not transmitted so that the display by the blue pixel 7 is not affected.

  Next, as shown in FIG. 2D, a transparent electrode layer 15 is formed on the substrate 3, the black matrix 5, the blue pixel 7, the red pixel 9, and the spacer forming red pixel 10. The transparent electrode layer 15 is formed by a vapor deposition method, a sputtering method, or a CVD method.

  Next, as shown in FIG. 2E, the green pixel 11 is formed on the transparent electrode layer 15, and the spacer forming green pixel 12 is formed on the spacer forming red pixel 10. The green pixels 11 and the like are formed by applying and patterning a photosensitive resin composition containing a pigment.

  When the color filter 1 is used in a liquid crystal display device, a TFT substrate is provided on the color pixel side of the color filter 1. The TFT substrate has a TFT and an electrode, and is in contact with the spacer-forming green pixel 12 constituting the spacer 13. Liquid crystal molecules are injected into a portion sandwiched between the TFT substrate and the color filter 1 to form a liquid crystal layer, and voltage application to the liquid crystal molecules is turned on / off by switching the TFT, thereby driving the liquid crystal display device.

  According to the first embodiment, the spacer forming red pixel 10 is formed when the red pixel 9 is formed, and the spacer forming green pixel 12 is formed when the green pixel 11 is formed. It is not necessary to provide a process independently, and the manufacturing process of the color filter 1 is reduced.

  In addition, according to the first embodiment, the color filter 1 and the TFT substrate are in contact with each other via the insulating spacer forming green pixel 12, so that the color filter 1 and the TFT substrate are not short-circuited.

  In addition, according to the first embodiment, the green pixel 11 and the spacer-forming green pixel 12 are in contact with the liquid crystal layer, but the blue pixel 7 is not in contact with the liquid crystal layer, so there is no contamination of the liquid crystal layer due to pigment elution, Less likely to cause liquid crystal display defects.

  When the blue pixel 7 is in contact with the liquid crystal layer, coloring of the liquid crystal layer is observed. On the other hand, when the green pixel 11 or the red pixel 9 is in contact with the liquid crystal layer, coloration on the liquid crystal layer is not observed. The blue pixel 7 is most colored on the liquid crystal layer. From the viewpoint of color characteristics, it is preferable that the green pixel 11 is the third colored pixel formed on the transparent electrode layer 15 as in the first embodiment, but in some cases, the red pixel 9 is the transparent electrode layer. 15 may be formed.

  The spacer formation red pixel 10 may or may not be present in forming the spacer 13. In that case, the spacer-forming green pixel 12 may be formed on the transparent electrode layer 15 at a location where the black matrix 5 and the red pixel 9 are laminated.

Next, a second embodiment will be described.
FIG. 3 is a diagram illustrating the color filter 2 according to the second embodiment. In the following embodiment, the same number is attached | subjected to the element which fulfill | performs the same aspect as the color filter 1 concerning 1st Embodiment, and the duplicate description is avoided.

  The color filter 2 has a black matrix 5 on the substrate 3 and a blue pixel 7 on the substrate 3 and the black matrix 5. A transparent electrode layer 15 is provided on the substrate 3, the black matrix 5, and the blue pixel 7. On the transparent electrode layer 15, a red pixel 9, a spacer forming red pixel 10, a green pixel 11, and a spacer forming green pixel 12 are provided. And have. A spacer forming red pixel 10 and a spacer forming green pixel 12 are stacked on the transparent electrode layer 15 where the black matrix 5 and the blue pixel 7 are stacked.

  The color filter 2 is different from the configuration of the color filter 1 in that the red pixel 9 and the spacer forming red pixel 10 are formed on the transparent electrode layer 15.

  According to the second embodiment, the spacer forming red pixel 10 is formed when the red pixel 9 is formed, and the spacer forming green pixel 12 is formed when the green pixel 11 is formed. It is not necessary to provide the process of forming independently, and the manufacturing process of the color filter 2 is reduced.

  In addition, according to the second embodiment, the color filter 2 and the TFT substrate are in contact with each other via the insulating spacer forming green pixel 12, so that the color filter 2 and the TFT substrate are not short-circuited.

Next, a third embodiment will be described.
FIG. 4A is a diagram illustrating the color filter 101 according to the third embodiment.

  In addition to the configuration of the color filter 1, the color filter 101 includes a protective layer 17 on the transparent electrode layer 15, the green pixel 11, and the spacer-forming green pixel 12.

  The protective layer 17 is made of a light-transmitting photosensitive resin composition or a light-transmitting inorganic substance.

  As the photosensitive resin composition, the same resin composition as that used when forming the blue pixel 7 can be used.

  As the inorganic substance, silicon nitride, silicon oxide, aluminum oxide, tantalum oxide, niobium oxide, or the like can be used. In particular, silicon dioxide, silicon oxynitride, tantalum pentoxide, or niobium pentoxide is preferably used.

  The protective layer 17 is formed by applying a photosensitive resin composition on the black matrix 5, the transparent electrode layer 15, the green pixel 11, and the spacer-forming green pixel 12, or applying an inorganic substance by vapor deposition, sputtering, or CVD. It is formed by forming a thin film.

  The protective layer 17 can prevent impurities from eluting from the blue pixel 7, red pixel 9, green pixel 11, and black matrix 5 to the liquid crystal layer.

  According to the third embodiment, in addition to the effects produced by the first embodiment, when the color filter 101 is used in a liquid crystal display device, contamination of the liquid crystal layer can be prevented, and defects in the liquid crystal display can be reduced. Can do.

  Further, according to the third embodiment, it is possible to suppress the deterioration of the color filter 101 due to the influence of the cleaning process, the heating process, the rework, etc. in the manufacturing process of the color filter 101 and the liquid crystal display device manufacturing process.

Next, a fourth embodiment will be described.
FIG. 4B is a diagram illustrating the color filter 102 according to the fourth embodiment.

  In addition to the configuration of the color filter 2, the color filter 102 includes a protective layer 17 on the red pixel 9, the spacer forming red pixel 10, the green pixel 11, the spacer forming green pixel 12, and the transparent electrode layer 15.

  The protective layer 17 is made of the same material as the protective layer 17 shown in the third embodiment and can be formed by the same method.

  In the fourth embodiment, in addition to the effects produced in the second embodiment, when the color filter 102 is used in a liquid crystal display device, contamination of the liquid crystal layer can be prevented and defects in the liquid crystal display device can be reduced. Can do.

  Further, according to the fourth embodiment, it is possible to suppress the deterioration of the color filter 101 due to the influence of the cleaning process, the heating process, the rework, etc. in the manufacturing process of the color filter 102 and the manufacturing process of the liquid crystal display device.

Next, a fifth embodiment will be described.
FIG. 5 is a diagram illustrating the color filter 103 according to the fifth embodiment.

  The color filter 103 includes yellow pixels 18 and cyan pixels 19 in addition to the configuration of the color filter 1.

  The yellow pixel 18 and the cyan pixel 19 are made of a photosensitive resin composition containing a yellow dye and a cyan dye. It can be formed in the same manner as the blue pixel 7 or the like.

  According to the fifth embodiment, the spacer forming red pixel 10 is formed when the red pixel 9 is formed, and the spacer forming green pixel 12 is formed when the green pixel 11 is formed. Therefore, the spacer 13 is formed. There is no need to provide an independent process, and the manufacturing process of the color filter 103 is reduced.

  In addition, according to the fifth embodiment, the color filter 103 and the TFT substrate are in contact with each other through the insulating spacer forming green pixel 12, and therefore the color filter 103 and the TFT substrate are not short-circuited.

  Further, a protective layer 17 may be provided on the transparent electrode 15, the green pixel 11, and the spacer forming green pixel 12. The protective layer 17 prevents impurities from eluting from the color filter 103 to the liquid crystal layer.

  According to the fifth embodiment, the color tone reproducibility can be increased by increasing the types of colored pixels.

In addition, as colored pixels other than the blue pixel 7, the red pixel 9, the green pixel 11, the yellow pixel 18, and the cyan pixel 19, pixels of various colors such as a magenta pixel, a white pixel, and an emerald pixel can be appropriately added.
One of the yellow pixel 18 and the cyan pixel 19 may not be provided. Moreover, you may have a pixel of the same color.

Hereinafter, the present invention will be specifically described using examples and comparative examples.
[Example 1] Corresponding to the first embodiment. Formation of light shielding part As a transparent substrate for a color filter, a glass substrate (Asahi Glass Co., Ltd. AN material) having a size of 100 mm × 100 mm and a thickness of 0.7 mm was prepared. After this substrate was washed according to a conventional method, a photosensitive resin composition (CFPR DN-83 manufactured by Tokyo Ohka Kogyo Co., Ltd.) was applied to the entire surface of one side of the substrate, and exposed and developed through a predetermined mask. Thereafter, the substrate was left to stand in an atmosphere of 230 ° C. for 30 minutes to perform heat treatment, thereby forming a light shielding portion (thickness D = 1.5 μm) in a region where the light shielding portion was to be formed.

2. Formation of colored layer On the transparent substrate on which the light-shielding part is formed as described above, a blue curable resin composition having the following composition was applied by spin coating (application thickness: 2.0 μm), and then heated at 80 ° C. For 3 minutes. Next, a photomask is placed at a distance of 150 μm from the coating film of the blue curable resin composition, and a proximity aligner is used only in a region corresponding to a region where a blue pixel is to be formed using a 2.0 kW ultrahigh pressure mercury lamp. Ultraviolet rays were irradiated for 10 seconds. Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 degreeC) for 1 minute, and alkali image development was carried out, and only the uncured part of the coating film of a blue curable resin composition was removed. Thereafter, the substrate was left in an atmosphere of 230 ° C. for 30 minutes to perform a heat treatment to form a blue relief pattern in a region where a blue pixel was to be formed, thereby obtaining a blue colored portion.

  Next, using the red curable resin composition having the following composition, a pattern was formed in red in the region where the red pixel was to be formed and the red pixel for spacer formation in the same process as the formation of the blue colored portion.

  Next, a transparent electrode layer was formed on the substrate. The transparent electrode layer was formed with about 1000 mm of ITO by sputtering.

  Next, using the green curable resin composition having the following composition, green colored portions were formed in regions where green pixels should be formed and spacer forming green pixels in the same process as the formation of red colored portions.

<Composition of green curable resin composition>
Green colorant (CI Pigment Green 36): 6.0 parts by weight Dispersant (Arubia Corp. Solpers 24000): 3.0 parts by weight Monomer (SR399 SR399): 4.0 parts by weight Polymer I: 5.0 parts by weight / initiator (Irgacure 907 manufactured by Ciba Specialty Chemicals): 1.4 parts by weight / initiator (2,2′-bis (o-chlorophenyl) -4,5,4 ′ , 5'-tetraphenyl-1,2'-bisimidazole): 0.6 parts by weight ・ Solvent (propylene glycol monomethyl ether acetate): 80.0 parts by weight

<Composition of blue curable resin composition>
Blue colorant (C.I. Pigment Blue 15: 6): 6.0 parts by weight Pigment derivative (Solsperse 12000, manufactured by Avicia): 0.6 parts by weight Dispersant (Solpers 24000, manufactured by Abyssia): 2. 4 parts by weight / monomer (SR399 manufactured by Sartomer): 4.0 parts by weight / Polymer I: 5.0 parts by weight
Initiator (Irgacure 907 manufactured by Ciba Specialty Chemicals): 1.4 parts by weight Initiator (2,2′-bis (o-chlorophenyl) -4,5,4 ′, 5′-tetraphenyl- 1,2'-bisimidazole): 0.6 parts by weight / solvent (propylene glycol monomethyl ether acetate): 80.0 parts by weight

<Composition of red curable resin composition>
Red colorant (CI Pigment Red 177): 6.0 parts by weight Dispersing agent (Solpers 24000 manufactured by Abyssia): 3.0 parts by weight Monomer (SR399 manufactured by Sartomer): 4.0 parts by weight Polymer I: 5.0 parts by weight / initiator (Irgacure 907 manufactured by Ciba Specialty Chemicals): 1.4 parts by weight / initiator (2,2′-bis (o-chlorophenyl) -4,5,4 ′ , 5'-tetraphenyl-1,2'-bisimidazole): 0.6 parts by weight Surfactant (Nonion HS-210, manufactured by NOF Corporation): 1.0 part by weight, solvent (propylene glycol monomethyl ether) Acetate): 79.0 parts by weight

  The polymer I is based on 100 mol% of a copolymer of benzyl methacrylate: styrene: acrylic acid: 2-hydroxyethyl methacrylate = 15.6: 37.0: 30.5: 16.9 (molar ratio). 2-methacryloyloxyethyl isocyanate was added at 16.9 mol%, and the weight average molecular weight was 42500.

3. Preparation of Liquid Crystal Cell An alignment film made of polyimide was formed on the film forming surface of the color filter obtained as described above. After the alignment film was rubbed, a bead spacer having a particle diameter of 6 μm was sprayed on the glass substrate, and the glass substrate on which the ITO electrode was formed was bonded and the periphery was hardened with an epoxy adhesive to form an empty cell. A nematic liquid crystal having positive dielectric anisotropy was injected into the liquid crystal, and the liquid crystal injection port was sealed with an epoxy adhesive to produce a liquid crystal cell.

4. Reliability Evaluation of Liquid Crystal Cell The voltage holding ratio (VHR) of the liquid crystal cell obtained as described above was measured and showed a high value of 99% in the initial stage. Subsequently, when this liquid crystal cell was heated in an oven at 105 ° C. for 168 hours and VHR was measured, it showed a high value of 97%. The voltage holding ratio was measured using a VHR-1 type manufactured by Toyo Technica Co., Ltd., and applying ± 5 V to the liquid crystal cell under the conditions of a pulse width of 10 μs and a frequency of 60 Hz.

5. Evaluation of liquid crystal Although the liquid crystal cell was disassembled and only the liquid crystal was recovered with acetone, the solution was observed to be colorless and transparent.

[Example 2] Corresponding to the second embodiment A light shielding portion and a blue pixel were formed in the same manner as in Example 1.

  Next, a transparent electrode layer was formed on the substrate. The transparent electrode layer was formed with about 1000 mm of ITO by sputtering.

  Next, in the same process as in Example 1, a red pattern was formed in the region where the red pixel is to be formed and the spacer forming red pixel.

  Next, in the same process as in Example 1, green colored portions were formed in regions where green pixels are to be formed and spacer forming green pixels.

  Next, a liquid crystal cell was prepared in the same manner as in Example 1, and when VHR was measured, it showed a high value of 99% in the initial stage and a high value of 97% even after heating in an oven at 105 ° C. for 168 hours. It was. Further, as in Example 1, no coloration of the liquid crystal was observed.

[Comparative example]
A light shielding portion and a blue pixel were formed in the same manner as in Example 1.

  Next, a transparent electrode layer was formed on the substrate. The transparent electrode layer was formed with about 1000 mm of ITO by sputtering.

  Next, a blue pixel is formed by the same method as in the first embodiment, and then a red pattern is formed in the region where the red pixel is to be formed and the red pixel for spacer formation in the same steps as in the first embodiment. A green colored portion was formed in the region where the film is to be formed and the green pixel for spacer formation.

  Next, a liquid crystal cell was prepared in the same manner as in Example 1, and VHR was measured. As a result, it showed a high value of 99% in the initial stage, but after heating in an oven at 105 ° C. for 168 hours, a low value of 87% was obtained. Indicated. Further, the collected liquid crystal was colored blue, and the blue pigment could be taken out from the blue-colored liquid crystal. Thus, elution of the blue pigment into the liquid crystal layer was confirmed. It is considered that the VHR of the liquid crystal cell of the comparative example was lowered because the blue pigment of the blue pixel in contact with the liquid crystal layer was dissolved in the liquid crystal by heating and interacted with the liquid crystal.

  The preferred embodiments of the color filter according to the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

1 is a diagram illustrating a color filter 1 according to a first embodiment. The figure which shows the manufacturing process of the color filter 1 which concerns on 1st Embodiment. The figure which shows the color filter 2 which concerns on 2nd Embodiment. (A) The figure which shows the color filter 101 which concerns on 3rd Embodiment, (b) The figure which shows the color filter 102 which concerns on 4th Embodiment. FIG. 10 is a diagram illustrating a color filter 103 according to a fifth embodiment.

Explanation of symbols

1, 2 ... Color filter 3 ... Substrate 5 ... Black matrix 7 ... Blue pixel 9 ... Red pixel 10 ... Red spacer pixel 11 ... Green pixel 12 ... Green pixel for spacer formation 13 ......... Spacer 15 ......... Transparent electrode layer 17 ......... Protective layer 18 ......... Yellow pixel 19 ......... Cyan pixel 101, 102, 103 ......... Color filter

Claims (14)

A substrate,
A black matrix formed on the substrate;
A colored pixel and a transparent electrode layer on the substrate and the black matrix;
Have
A color filter comprising a spacer made of the colored pixels and one or more colored pixels on the transparent electrode layer. On the transparent electrode layer, the colored pixel and the spacer,
The color filter according to claim 1, further comprising a protective layer. A substrate,
A black matrix formed on the substrate;
A first colored pixel formed on the substrate and the black matrix;
A second colored pixel formed on the substrate and the black matrix;
A first colored pixel for spacer formation formed on the first colored pixel at a position where the black matrix and the first colored pixel are laminated;
A transparent electrode layer formed on the substrate, the black matrix, the first colored pixels, the second colored pixels, and the first spacer forming colored pixels;
A third colored pixel formed on the transparent electrode layer at a location corresponding to the substrate and the black matrix;
A second spacer-forming colored pixel formed on the transparent electrode layer at a location corresponding to the first spacer-forming colored pixel;
A color filter comprising: On the transparent electrode layer, the third colored pixel, and the second spacer forming colored pixel,
The color filter according to claim 3, further comprising a protective layer. A substrate,
A black matrix formed on the substrate;
A first colored pixel formed on the substrate and the black matrix;
A transparent electrode layer formed on the substrate, the black matrix and the first colored pixel;
A second colored pixel formed on the transparent electrode layer at a location corresponding to the substrate and the black matrix;
A first spacer-forming colored pixel formed on the transparent electrode layer at a position where the black matrix and the first colored pixel are laminated;
A third colored pixel formed on the transparent electrode layer at a location corresponding to the substrate and the black matrix;
A second spacer forming colored pixel formed on the first spacer forming colored pixel;
A color filter comprising: On the transparent electrode layer, the second colored pixel, the first spacer forming colored pixel, the third colored pixel, and the second spacer forming colored pixel,
6. The color filter according to claim 5, further comprising a protective layer.   The color filter according to claim 3, wherein the first colored pixel is a blue pixel. Forming a black matrix on the substrate (a);
Forming a colored pixel of one or more colors on the substrate and the black matrix; and
Forming a transparent electrode layer on the substrate, the black matrix and the colored pixels (c);
Forming a colored pixel of one or more colors on the transparent electrode layer; and
Comprising
A method for producing a color filter, wherein a part of the colored pixels is laminated through the transparent electrode layer to form a spacer. After step (d)
A step (e) of forming a protective layer on the transparent electrode layer, the colored pixel, and the spacer;
The method for producing a color filter according to claim 8, comprising: Forming a black matrix on the substrate (a);
Forming a first colored pixel on the substrate and the black matrix;
Forming a second colored pixel on the substrate and the black matrix;
A step (d) of forming a first spacer-forming colored pixel on the first colored pixel at a location where the black matrix and the first colored pixel are laminated;
Forming a transparent electrode layer on the substrate, the black matrix, the first colored pixel, the second colored pixel, and the first spacer-forming colored pixel (e);
Forming a third colored pixel on the transparent electrode layer at a location corresponding to the substrate and the black matrix;
Forming a second spacer forming colored pixel on the transparent electrode layer at a location corresponding to the first spacer forming colored pixel;
Comprising
The step (c) and the step (d) are performed simultaneously,
The method for producing a color filter, wherein the step (f) and the step (g) are performed simultaneously. After step (g)
Forming a protective layer on the transparent electrode layer, the third colored pixel, and the second spacer-forming colored pixel (h);
The method for producing a color filter according to claim 10, comprising: Forming a black matrix on the substrate (a);
Forming a first colored pixel on the substrate and the black matrix;
Forming a transparent electrode layer on the substrate, the black matrix and the first colored pixel (c);
Forming a second colored pixel on the transparent electrode layer at a location corresponding to the substrate and the black matrix;
Forming a first spacer-forming colored pixel on the transparent electrode layer at a location where the black matrix and the first colored pixel are laminated; and
Forming a third colored pixel on the transparent electrode layer at a location corresponding to the substrate and the black matrix;
Forming a second spacer forming colored pixel on the first spacer forming colored pixel (g);
Comprising
The step (d) and the step (e) are performed simultaneously,
The method for producing a color filter, wherein the step (f) and the step (g) are performed simultaneously. After step (g)
Forming a protective layer on the transparent electrode layer, the second colored pixel, the first spacer-forming colored pixel, the third colored pixel, and the second spacer-forming colored pixel (h) )When,
The method for producing a color filter according to claim 12, comprising:   The method for manufacturing a color filter according to claim 10, wherein the first colored pixel is a blue pixel.

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