JP2001091729A - Color filter and liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a protective film for a color filter, which is capable of preventing cissing at the time of coating and accumulation of charge and has a good adhesive property to an oriented film and a good yield in manufacture of a liquid crystal display device. SOLUTION: This color filter is used for a liquid crystal display device in which a liquid crystal layer is interposed between a pair of transparent insulating substrates and a liquid crystal is driven by a parallel electric field between a pixel electrode and a common electrode formed on one array substrate of the pair of substrates and disposed opposite to the array substrate. The color filter is characterized in that the protective film provided on the color filter is formed from a thermosetting resin composition containing a compound having at least one kind of alkoxy silane, silanol and a silanol condensate and a carboxylic acid in one molecule and having a molecular weight of 200-1,000.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter used in a color liquid crystal display device and a liquid crystal display device using the color filter, and more particularly to an in-plane switching (IPS) mode. A color filter having a protective film, which is preferably used for a liquid crystal display device, has excellent adhesion to an alignment film, excellent coating stability of the alignment film, and further has excellent stability of a liquid crystal driving voltage.
And a liquid crystal display device using the color filter.

[0002]

2. Description of the Related Art A color filter used in a color liquid crystal display device is composed of a light-shielding layer formed on a transparent insulating substrate and red, green and blue colored pixel layers. A transparent electrode is provided. The protective film, including the transparency of the protective film layer, the flatness against the surface unevenness of the color filter, the adhesion with the transparent insulating substrate, the colored pixel layer, and the light-shielding layer that constitute the lower layer, and the adhesion with the transparent electrode that constitutes the upper layer Wide range of properties, such as smoothness, light resistance, moisture and heat resistance, solvent resistance, chemical resistance, heat resistance, and adhesion to sealing materials in the substrate bonding process when manufacturing liquid crystal cells, pressure resistance, toughness, etc. Characteristics are required.

Further, in recent years, one method for improving the narrow viewing angle, which is a drawback of the TN mode liquid crystal display device, is disclosed in Japanese Patent Application Laid-Open Nos. 7-159786 and 7-159786.
Japanese Patent Application Laid-Open Publication No. H10-107, discloses an in-plane switching (IPS) mode color liquid crystal display device.

The operation of the liquid crystal display device in the IPS mode is based on T
The liquid crystal sandwiched between the FT array side substrate and the color filter generates an electric field substantially parallel to the substrate between the pixel electrode and the common electrode provided on the array side substrate to drive the liquid crystal.
Therefore, since the liquid crystal is horizontally aligned, the display characteristics do not involve the birefringence of the liquid crystal, and a wide viewing angle can be achieved as compared with a conventional TN mode liquid crystal display device.

[0005] Unlike the TN mode, the IPS mode liquid crystal display device does not require a transparent electrode on a color filter, and an alignment film is provided directly on a protective film layer. Therefore, the protective film used for the IPS mode liquid crystal display device has excellent basic characteristics as described above,
It is very important that the adhesion between the protective film and the alignment film is good, the coating stability of the alignment film, and the stability of the liquid crystal drive voltage are excellent.

[0006]

However, the conventional protective film material for the IPS color filter is a polyimide resin, a thermosetting acrylic resin, a urethane resin, a polyglycidyl methacrylate resin which has been used in a TN mode or the like. In many cases, epoxy-based thermosetting resins, siloxane polymers, etc. are diverted and used, and when an alignment film is formed on a protective film formed of such a resin, the adhesion of the alignment film is reduced or the alignment film is reduced. For example, repelling may occur during the application of the liquid crystal display, thereby lowering the yield of the liquid crystal display device. In addition, due to the absence of the conductive transparent electrode layer directly under the alignment film, charges are accumulated on the surface of the color filter substrate when the liquid crystal is driven, so that the so-called afterimage, in which the alignment of the liquid crystal cannot follow the voltage application, is observed. However, there is a problem that the display quality is adversely affected.

Therefore, recently, in order to improve display quality such as an afterimage caused by a surface charge of a color filter substrate, a protective film material for an IPS color filter has recently been used.
For example, it is possible to use a low-dielectric-constant material composed of a reaction product of an acrylic copolymer having an acid group and an epoxy compound as disclosed in JP-A-10-332921, and JP-A-10-319382. It has been proposed to use an inorganic material such as SiO2 as shown in FIG.
However, when an epoxy compound is used for the protective film, the adhesion to the substrate or the alignment film is not sufficient,
No. 2 has problems such as a decrease in coating stability of the alignment film and an excessive heat load on the color filter in the manufacturing process. At present, protection which satisfies all the characteristics required for the IPS color filter. No membrane was obtained.

The present invention has been made in response to such a conventional problem. Particularly, in an IPS mode liquid crystal display device, in addition to the basic characteristics such as transparency, adhesion, and various resistances,
An object of the present invention is to provide a color filter and a liquid crystal display device having a protective film having excellent adhesion to an alignment film and coating stability of the alignment film, and further having excellent stability of liquid crystal driving voltage.

[0009]

Means for Solving the Problems To solve the above problems, the color filter of the present invention has the following constitution.

That is, in a liquid crystal display device in which a liquid crystal layer is sandwiched between a pair of transparent insulating substrates and a liquid crystal is driven by a parallel electric field between a pixel electrode and a common electrode formed on one array substrate of the pair of substrates. A color filter used to be disposed opposite to the array substrate, wherein the protective film provided on the color filter contains at least one of alkoxysilane, silanol, and silanol condensate and carboxylic acid in the same molecule. And a protective film formed from a thermosetting resin composition containing a compound having a molecular weight in the range of 200 to 1,000.

The color filter of the present invention comprises a compound containing at least one of alkoxysilane, silanol, and silanol condensate and a carboxylic acid in the same molecule and having a molecular weight in the range of 200 to 1,000, A protective film formed from a thermosetting resin composition containing an epoxy compound and / or a diamine compound having a functional group in a side chain having a molecular weight in the range of 50 to 1000 is provided.

Further, a liquid crystal display device of the present invention is characterized by using the color filter of the present invention.

[0013]

Embodiments of the present invention will be described below.

In the present invention, it has been found that the following measures are effective with respect to the coating stability of the alignment film, which is particularly important as a protective film of the color filter for IPS, and the holding characteristic of the liquid crystal driving voltage.

That is, the protective film of the color filter for IPS contains at least one of alkoxysilane, silanol, and silanol condensate and carboxylic acid in the same molecule, and has a molecular weight in the range of 200 to 1,000. It is to use a protective film formed from a thermosetting resin composition containing a compound, alkoxysilane, silanol, at least one of silanol condensate and carboxylic acid contained in the same molecule, Molecular weight 200-1000
Use of a protective film formed from a thermosetting resin composition containing a compound having a molecular weight in the range of 50 to 1000 and an epoxy compound and / or a diamine compound having a functional group in a side chain having a molecular weight in the range of 50 to 1,000. It is.

The alkoxysilane of the present invention, silanol,
For a compound containing at least one of the silanol condensates and a carboxylic acid in the same molecule, if the molecular weight is too high, the planarization characteristics will be poor, and if the molecular weight is too low, Has a molecular weight range of 200 since sublimation and evaporation during heating are likely to occur.
It is preferably from 1,000 to 1,000.

The method for obtaining a compound containing at least one of alkoxysilane, silanol, and silanol condensate and a carboxylic acid in the same molecule is not particularly limited, and a compound having an alkoxysilane and a carboxylic acid Can be obtained by a reaction or polymerization of a compound having the following formula. However, it is preferable to obtain the compound by reacting an aminoalkoxysilane with an acid anhydride because of easy availability of the compound and easy control of the molecular weight. In particular, considering the versatility and molecular weight of the material, γ-aminopropylmethyldimethoxysilane, γ-
Aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-β (aminoethyl) γ-aminopropylmethyldimethoxysilane, N-β (aminoethyl) γ-aminopropyltrimethoxysilane, N-
β (aminoethyl) γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, and the like can be used.

The acid anhydride is not particularly limited as long as it is an acid anhydride containing a carboxylic acid, but trimellitic anhydride is preferably used in view of availability and cost. In addition, when trimellitic acid and aminoalkoxysilane are reacted at an equimolar ratio, no acid anhydride remains, so that storage stability when mixed with an epoxy compound is improved. That is, as an acid anhydride,
When an acid dianhydride such as pyromellitic dianhydride is used, the acid anhydride remains when reacted with an aminoalkoxysilane in an equimolar ratio, but the reaction between the acid anhydride and the epoxy is fast. Therefore, storage stability is poor, which is not preferable.

The above aminoalkoxysilane is
It can be used in the state of being reacted with the acid anhydride, but it can also be used in the state of hydrolyzed silanol or in the state of hydrolyzed and condensed silanol. The hydrolysis is performed by adding water to the reaction product of the aminoalkoxysilane and the acid anhydride and reacting at a low temperature.The hydrolysis condensation is performed by adding water to the reaction product of the aminoalkoxysilane and the acid anhydride and heating the mixture. This is performed by distilling off water and alcohol. Here, an acid catalyst may be added to the hydrolysis and the hydrolysis and condensation.

The epoxy compound in the thermosetting resin composition used in the color filter of the present invention has a molecular weight of 5
Since the side chain contains a functional group in the range of 0 to 1000, it is possible to suppress the orientation of the cured polymer in the coating film surface, and to further improve the voltage holding characteristics of the protective film. The side chain referred to here is a portion that protrudes from the main chain direction generated by the reaction between the epoxy group and the carboxylic acid. Here, regarding the molecular weight of the functional group, 5
When the value is smaller than 0, the effect of suppressing the orientation is reduced. When the value is larger than 1000, the reactivity with the curing agent is reduced. The structure of the functional group is not particularly limited, but a functional group having a planar structure such as a benzene ring or a polycyclic aromatic is preferable, and fluorene is more preferably used.

In the thermosetting resin composition used in the color filter of the present invention, a compound containing at least one of alkoxysilane, silanol, and silanol condensate, a carboxylic acid in the same molecule, and a molecular weight of 50 ~
The mixing ratio with the epoxy compound containing a functional group in the side chain in the range of 1000 is 100% by weight of a compound containing at least one of alkoxysilane, silanol, and silanol condensate and a carboxylic acid in the same molecule. Parts to 300 parts by weight of the epoxy compound, preferably 10 to 250 parts by weight, more preferably 20 to 20 parts by weight.
0 parts by weight. If the amount of the compound containing at least one of alkoxysilane, silanol, and silanol condensate and the carboxylic acid in the same molecule is too small, the curing of the epoxy compound becomes insufficient. It is not preferable because the toughness is reduced.

Further, a curing catalyst may be added to the thermosetting resin composition used for the color filter of the present invention.
Examples of the curing catalyst include, but are not limited to, amines, imidazoles, metal chelates and the like.

The thermosetting resin composition used in the color filter of the present invention may be dissolved in a solvent and used as a thermosetting resin solution composition. As the solvent to be used, ketones such as methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, diethyl ether, isopropyl ether, tetrahydrofuran, dioxane, ethers such as ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, acetic acid Ethyl, n-butyl acetate, 3-methoxy-3-methylbutyl acetate, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, propylene glycol Monomethyl ether acetate, amides and esters, N, N-dimethylformamide, N, N- dimethylacetamide and propylene glycol monoethyl ether acetate, .gamma.-butyrolactone, 2-pyrrolidone,
And pyrrolidones such as N-methylpyrrolidone. Among these, it is necessary to select a solvent in consideration of the applicability, the solubility of the constituent components, etc., alone or
Two or more types can be used in combination. Moreover, about the solid content concentration of the thermosetting resin composition of this invention, it is 10-70%, Preferably it is 15-60%, More preferably, it is 20-50% from a coating method and a viewpoint of solubility. .

Further, a surfactant can be added to the thermosetting resin solution composition used for the color filter of the present invention for the purpose of improving coating properties and drying properties. The amount of the surfactant is usually 0.01 to 10 parts by weight, preferably 0.0 to 10 parts by weight, per 100 parts by weight of the resin.
It is 3 to 1 part by weight. If the amount is too small, the coating properties and
There is no effect of improving the drying property, and if it is too much, on the contrary, poor coating properties and a decrease in the toughness of the coating film are caused.

Specific examples of the surfactant include silicone oils such as dimethyl silicone oil and methylphenyl silicone oil, alkyl, fluorine-modified silicone oil, polyether, alcohol-modified silicone oil, amino-modified silicone oil, and epoxy-modified silicone oil. Modified silicone oils such as phenol, carboxy, mercapto-modified silicone oils, anionic surfactants such as ammonium lauryl sulfate, polyoxyethylene alkyl ether triethanolamine sulfate, cationic surfactants such as lauryl trimethyl ammonium chloride, lauryl dimethyl Amphoteric surfactants such as amine oxide, lauryl carboxymethyl hydroxyethyl imidazolium betaine, polyoxyethylene lauri Ether, polyoxyethylene stearyl ether, nonionic surfactant, such as sorbitan monostearate, and the like acrylic polymer.
In the present invention, the surfactant is not limited thereto, and one of the above surfactants may be used alone, or two or more of them may be used in combination.

In preparing the color filter of the present invention,
As a method of applying the thermosetting resin solution composition on a substrate on which a light-shielding layer and a colored layer are formed, a spin coater,
Various methods can be used, such as a method of coating a substrate with a bar coater, a blade coater, a roll coater, a die coater, a screen printing method, or the like, a method of dipping the substrate in a solution, and a method of spraying the solution on the substrate.

The method of curing the thermosetting resin composition or the thermosetting resin solution composition used in the color filter of the present invention is not particularly limited, and includes a hot air dryer, a hot plate, an IR heater, a vacuum heating dryer and the like. Done by
The heating time is appropriately selected depending on the kind of the resin component, the mixing ratio, and the like, and is usually about 100 minutes to 300 ° C. for about 15 minutes to 2 hours.

Further, the materials of the light-shielding layer and the colored layer constituting the color filter of the present invention and the forming method are not particularly limited. The light-shielding layer is often formed by patterning a finely patterned metal thin film of metal chromium, chromium oxide, or the like, or a resin in which a black pigment, a metal oxide, carbon black, or the like is dispersed in a resin. As a method of forming a colored layer, a method of dyeing a dyeable medium formed using a photolithography method, a method of using a photosensitive pigment dispersion composition, a method of etching a non-photosensitive pigment dispersion composition, and a method of patterning There are a method of forming a colored portion by an electrodeposition method using an electrode, a printing method, an inkjet method, and the like, and any of them can be preferably used.

The color filter of the present invention comprises a light-shielding layer formed on a transparent insulating substrate, a colored layer having three primary colors,
Further, it is preferable that the protective film is formed of a protective film. Further, a plurality of dot-shaped spacers using at least one of the same material as the colored layer, a thermosetting resin, and an inorganic material are provided on the light-shielding layer and / or the colored layer and / or the protective film having the three primary colors. It may be provided.

The structure of the liquid crystal display device of the present invention comprises an array substrate in which a liquid crystal layer is sandwiched between a pair of transparent insulating substrates, and a pixel electrode and a common electrode are arranged on one of the pair of substrates. I using a color filter having a protective film on a substrate
A PS mode liquid crystal display device is preferable.

[0031]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto. Example 1 After dissolving 62.1 g of trimellitic anhydride in 280 g of γ-butyrolactone, 75.0 g of γ-aminopropyltriethoxysilane was added, and the mixture was heated at 120 ° C. for 2 hours. A compound containing an acid was obtained. The molecular weight of this compound was 410.4. To 20 g of the obtained solution, 7 g of bisphenoxyethanol full orange glycidyl ether and 15 g of diethylene glycol dimethyl ether were added, and the mixture was stirred at room temperature (about 23 ° C.) for 2 hours to obtain a thermosetting resin solution composition for a color filter protective film (A1). ) Got. (Creation of color filter layer) As an insulating transparent substrate,
A 300 × 400 mm low expansion glass (product number 1737, thickness 1.1 mm) manufactured by Corning Co., Ltd. was used. Carbon black (manufactured by Mitsubishi Chemical Corporation, M
A-77) dispersed in a polyimide precursor resin (manufactured by Toray Industries, Inc., product name: “SP-341”) by a spin coater, and dried by heating at 110 ° C. for 20 minutes using an oven. A 3 μm polyimide precursor colored film was obtained. A positive photoresist (OFPR-800 manufactured by Tokyo Ohka Co., Ltd.) was applied on this film, and dried by heating at 80 ° C. for 20 minutes to obtain a resist film having a thickness of 1 μm. Ultraviolet rays were irradiated through a chromium photomask, development and resist stripping were performed to form a light-shielding layer. Next, a polyamic acid solution containing a red pigment dispersed therein (product name “SP” manufactured by Toray Industries, Inc.)
-341 ") is applied and dried by a spin coater, and a positive resist is applied. Then, the resist is irradiated with ultraviolet rays through a photomask, immersed in a developing solution composed of a 2.38 wt% aqueous solution of tetramethylammonium hydroxide, and then subjected to photolithography. The development of the resist and the polyimide precursor colored film was performed simultaneously. After the etching, the unnecessary photoresist layer was stripped with methyl cellosolve acetate. Further, the thus-obtained colored film of the polyimide precursor was heat-treated at 300 ° C. for 30 minutes in a nitrogen atmosphere.
A light-shielding layer of 0 μm was obtained. Next, a colored pixel layer was formed using a polyamic acid solution in which Pigment Red 177, Pigment Green 36, and Pigment Blue 15: 6 were dispersed as red, green, and blue pigments, respectively, in the same manner as in the light-shielding layer. (Formation of overcoat layer) A resin solution composition A for a protective film was formed on an insulating transparent substrate on which a light-shielding layer and a colored pixel were formed.
1 was applied to the entire surface by spin coating. Curing is performed at 280 ° C for 30 minutes in a hot-air oven.
A color filter having a protective film layer was obtained. (Preparation of Color Liquid Crystal Display Device) Subsequently, after the obtained color filter was washed with a neutral detergent, an alignment film made of a polyimide resin was applied by a printing method, and the resultant was washed with a hot plate.
Heated at 00 ° C for 10 minutes. The thickness of the obtained protective film was 0.07 μm. The coatability of the alignment film is good,
The substrate in which defects such as cissing were recognized in 10 samples was 0. In addition, in order to examine the adhesion of the alignment film, as a result of an adhesion test on the alignment film by a cross-cut peel test (JIS-5400), the average number of 10 samples was 10.

Further, the color filter substrate was subjected to a rubbing treatment, a sealant was applied by a dispense method, and baked on a hot plate at 90 ° C. for 10 minutes.

On the other hand, a substrate in which a TFT array driven by a lateral electrolysis method is formed on a Corning glass substrate 1737 is similarly washed, and then an alignment film is applied and baked. Thereafter, a spacer is sprayed, the spacer is superposed on the color filter substrate, and baked at 160 ° C. for 90 minutes while pressurizing in an oven to cure the resin. This cell was heated at 120 ° C. and 10 ⁻³ t.
After vacuum annealing at orr, the pressure was once returned to normal pressure under a nitrogen atmosphere, and liquid crystal was injected again in a vacuum atmosphere. The pressure was reduced to 10 @ ³ torr at room temperature liquid crystal injection put the cell into the chamber, immersed liquid crystal injection hole in the liquid crystal tank, it went back to normal pressure with nitrogen. After injecting the liquid crystal, the liquid crystal injection hole was sealed using a UV curable resin. The panel was heated to a temperature equal to or higher than the NI transition point to reorient the liquid crystal.

Next, a polarizing plate is attached to the two glass substrates of the cell, and the temperature is 50 ° C. and the pressure is 5 kgf in an autoclave.
/ Cm 2 to complete the cell. In this state, the cell was turned on, and after confirming that there was no display unevenness or the like, a driver element or the like was mounted around the cell to complete a liquid crystal display device.

Using this liquid crystal display device, the voltage holding characteristics before and after the phase of the applied voltage was inverted were measured.
%Met. Further, when the still image was turned on after being continuously turned on for 24 hours, the displayed still image remained on the screen. This time was defined as an afterimage time, and if the afterimage time was less than 10 seconds, it was determined that the device had good display characteristics. The result of the measurement of the afterimage time was 6 seconds, which was good. Example 2 γ-aminopropylmethyldiethoxysilane 73.5
g was dissolved in 280 g of γ-butyrolactone, 3.0 g of purified water was added, and the mixture was heated at 90 ° C. for 1 hour. Thereafter, 62.1 g of trimellitic anhydride was added, and
C. for 2 hours to obtain a compound containing an alkoxysilane or silanol condensate and a carboxylic acid in the same molecule. The molecular weight of this compound was 772.2. To 20 g of the obtained solution, 7 g of bisphenoxyethanol full orange glycidyl ether and 15 g of diethylene glycol methyl ethyl ether were added, and the mixture was added at room temperature (about 23 ° C.).
After stirring for 2 hours, a thermosetting resin solution composition (A2) for a color filter protective film was obtained. Further, a color filter was prepared in the same manner as in Example 1 using A2.

The obtained color filter was coated with an alignment film in the same manner as in Example 1. As a result, the coating properties were good, and no defects such as repelling were observed in 10 samples. In addition, a cross-cut peeling test on an alignment film (JIS-5)
The result of the adhesion test according to (400) was also favorable, with the average score of 10 samples being 9.8.

Further, the voltage holding characteristics of the liquid crystal display device manufactured by the same method as in Example 1 were 96%, and the afterimage time was 8 seconds, which was excellent. Comparative Example 1 γ-aminopropylmethyldiethoxysilane 73.5
g was dissolved in 280 g of γ-butyrolactone, 10.0 g of purified water was added, and the mixture was heated at 90 ° C. for 1 hour. Thereafter, 62.1 g of trimellitic anhydride was added, and 11
The mixture was heated at 0 ° C. for 2 hours to obtain a compound containing an alkoxysilane or silanol condensate and a carboxylic acid in the same molecule.
The molecular weight of this compound was 1320. In 20 g of the obtained solution, diethylene glycol dimethyl ether
After adding 15 g, the mixture was stirred at room temperature (about 23 ° C.) for 2 hours to obtain a thermosetting resin solution for a color filter protective film (B).
1) was obtained. Further, a color filter and an alignment film were produced in the same manner as in Example 1 using B1. The coating property of the alignment film was good, and 6 cissing samples were generated in 10 samples. As a result of an adhesion test on the alignment film by a cross-cut peeling test (JIS-5400), the average score of 10 samples was 9.6. Point, but the voltage holding characteristic of the liquid crystal display device was 89%
And an afterimage was generated for 28 seconds, which was defective. Comparative Example 2 31.1 g of trimellitic anhydride was dissolved in 280 g of γ-butyrolactone and heated at 120 ° C. for 2 hours. To 20 g of the obtained solution, 7 g of bisphenoxyethanol full orange glycidyl ether and 15 g of diethylene glycol dimethyl ether were added, and the mixture was added at room temperature (about 23
C.) for 2 hours to obtain a thermosetting resin solution (B2) for a color filter protective film. Further, a color filter was prepared in the same manner as in Example 1 using B2.

With respect to the obtained color filter, an alignment film was prepared in the same manner as in Example 1, and the coating property was observed. As a result, out of 10 samples, three coating defects due to cissing occurred. Further, in the cross-cut peeling test, the average score of 10 samples was 6.5, indicating that the adhesion between the alignment film and the protective film was reduced.
The liquid crystal display device has a voltage holding characteristic of 91% and an afterimage of 1
It occurred for 9 seconds and was defective.

[0039]

[Table 1]

[0040]

According to the present invention, in a IPS mode liquid crystal display device or the like, a protective film having excellent adhesion to an alignment film, excellent coating stability of an alignment film, and excellent stability of a liquid crystal driving voltage is provided. By providing a color filter and a liquid crystal display device, it is possible to prevent display defects from occurring.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08L 83/04 C08L 83/04 G02F 1/1335 505 G02F 1/1335 505 1/1343 1/1343 F-term ( Reference) 2H048 BA45 BB02 BB08 BB14 BB37 BB42 2H091 FA02Y GA16 HA18 LA02 2H092 JB56 KB23 KB26 NA04 NA14 NA17 NA18 NA25 PA02 3C059 AA02 DA01 4J002 CP021 CP031 CP051 CP091 EL136 FD090 FD150 FD200 FD310 G

Claims (6)

[Claims] 1. A liquid crystal display device in which a liquid crystal layer is sandwiched between a pair of transparent insulating substrates and a liquid crystal is driven by a parallel electric field between a pixel electrode and a common electrode formed on one of the pair of substrates. A color filter disposed to face the array substrate to be used, wherein a protective film provided on the color filter includes at least one of alkoxysilane, silanol, and silanol condensate and a carboxylic acid in the same molecule. A color filter, comprising: a protective film formed from a thermosetting resin composition containing a compound having a molecular weight in the range of 200 to 1,000. 2. A protective film formed from a thermosetting resin composition, wherein at least one of alkoxysilane, silanol, and silanol condensate and a carboxylic acid are contained in the same molecule, and the protective film has a molecular weight of 200 to 1,000. The color filter according to claim 1, further comprising an epoxy compound and / or a diamine compound having a functional group having a molecular weight in a range of 50 to 1000 on a side chain, in addition to the compounds in the range. 3. A compound containing at least one of alkoxysilane, silanol, and silanol condensate and a carboxylic acid in the same molecule is a reaction product of an aminoalkoxysilane and an acid anhydride. Item 1 or 2
The color filter according to any one of the above. 4. The color filter according to claim 3, wherein the acid anhydride is trimellitic anhydride. 5. A color filter is formed on at least one of a colored layer, a heat / photocurable resin, and an inorganic material on a light-shielding layer and / or a colored layer and / or a protective film having three primary colors. The color filter according to claim 1, further comprising a plurality of dot-shaped spacers. 6. The color filter according to claim 1, wherein a liquid crystal layer is sandwiched between a pair of transparent insulating substrates,
A liquid crystal display device used for a liquid crystal display device that drives liquid crystal by a parallel electric field between a pixel electrode and a common electrode formed on one of a pair of substrates.