JP2003043225A - Reflection film for display and liquid crystal display element using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflection film for a display which yields a liquid crystal display element having a simple configuration, a simple manufacturing process and a smaller thickness than conventional elements in the case of utilizing the reflection film as an electrode substrate for the liquid crystal display and so on. SOLUTION: The reflection film for the display comprises a transparent polymer film which exhibits in-plane retardation R(550) [nm] with respect to light with 550 nm wavelength satisfying inequality (I) and which has a transparent conductive layer formed on one surface thereof and a reflection layer and a resin layer P in contact with the reflection layer formed in this order on the other surface. R(550)>30...(I).

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a reflective film for a display, and more particularly to a reflective film useful as an electrode substrate of various display elements and a liquid crystal display element using the same. Such a reflective film
In particular, it is suitably used for a liquid crystal display element of a system that does not require a polarizing plate or a single polarizing plate type liquid crystal display element.

[0002]

2. Description of the Related Art In recent years, with the development of portable information equipment, there has been a demand for a high-quality and bright reflective liquid crystal display device (LCD) as a display device, such as Asia Display '95,
pp599, Digest AMLCD '96, pp.329, SID'97 Digest,
A device equipped with a single polarizing plate type LCD described in p.647 etc. has been put to practical use. Also, monthly LCD Intell
As described in igence 1997.4 pp81, indium oxide, tin oxide, or tin oxide on a film made of a transparent polymer for improvement of damage resistance, weight reduction and thinning required for display devices of portable information devices, or A transparent conductive film provided with a semiconductor film such as an oxide of a tin-indium alloy, a metal film such as an oxide film of gold, silver or palladium alloy, or a transparent conductive layer formed by combining a semiconductor film and a metal film. The study of using as a substrate of LCD is continuing.

[0003]

However, in the practically used single polarizing plate type LCD, it is necessary to use a plurality of retardation plates in order to secure excellent display quality. A component with a light-scattering function optimized for a single-polarizer type LCD called a scattering plate, or a light-scattering optimized for a single-polarizer type LCD called a scattering reflector or a scattering reflection electrode. It requires a component with a reflective function. For this reason, the device structure and manufacturing process of the LCD are extremely complicated.

Further, when a polymer film is used as a substrate for an LCD, it is necessary to form a gas barrier layer on the film for the purpose of ensuring the reliability of the panel, and further the resistance of the film to chemicals used in the LCD manufacturing process. If it is insufficient, it is necessary to form a chemical resistant layer. Therefore, the cost is generally higher than that of an LCD using a glass substrate.

The present invention is intended to solve such a problem, and when it is used as an electrode substrate for a liquid crystal display device or the like, the liquid crystal has a simpler device structure and manufacturing process and is thinner than the conventional liquid crystal. An object of the present invention is to provide a reflective film for a display that can obtain a display element.

[0006]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that such a problem is that a transparent conductive layer is formed on one surface of a transparent polymer film.
A reflective layer is formed on the other surface, a resin layer P as a protective layer for the reflective layer is formed on the reflective layer, and an in-plane retardation R (550) [n for light having a wavelength of 550 nm is provided.
m] was able to be solved by a reflective film characterized by satisfying a specific formula.

That is, the present invention is as follows. 1. In-plane retardation R (55
0) A transparent conductive layer is formed on one surface of a transparent polymer film whose [nm] satisfies the following formula (I), and a reflective layer and a resin layer P are formed on the other surface in contact with the reflective layer. Reflective film for displays. R (550)> 30 (I)

2. The transparent polymer film has the following formula (II)
The reflective film for a display as described in 1 above, which satisfies the above. (100 + 275 × N) <R (550) <(180 + 275 × N) (II) [In the above formula (II), N is a natural number including 0.] ]

3. The transparent polymer film has the formula (II
The reflective film for a display according to the above 1, which satisfies I). (220 + 275 × N) <R (550) <(420 + 275 × N) (II I) [N is a natural number including 0 in the above formula (III). ]

4. The transparent polymer film has the following formula (IV)
The reflective film for a display as described in 1 above, which satisfies the above. (360 + 275 × N) <R (550) <(620 + 275 × N) ... (IV) [In the above formula (IV), N is a natural number including 0]

5. The reflective film for a display according to any of 1 to 4 above, wherein the change rate of shrinkage before and after the heat treatment at 120 ° C. for 2 hours is 0.4% or less, and the change rate of R (550) is 20% or less.

6. 1 to above with a reflectance of 30% or more
5 reflective film for display.

7. The transparent polymer film has the following formula (1)

[Chemical 6] [In the above formula (1), R _{1 to} R ₈ are each independently selected from a hydrogen atom, a halogen atom and a hydrocarbon group having 1 to 6 carbon atoms, and X is a hydrocarbon group having 1 to 15 carbon atoms. ] The reflective film for displays of said 1-6 which consists of polycarbonate which consists essentially of the repeating unit represented by these.

8. Polycarbonate has the following formula (2)

[Chemical 7] [In the above formula (2), R ^{9 to} R ¹⁴ are each independently at least one selected from a hydrogen atom, a halogen atom, and a hydrocarbon group having 1 to 6 carbon atoms. ] The reflective film for a display of the above 7, which is a polycarbonate containing a repeating unit represented by the following.

9. Polycarbonate has the following formula (3)

[Chemical 8] [In the above formula (3), R ^{17 to} R ²⁴ are each independently at least one selected from a hydrogen atom, a halogen atom, and a hydrocarbon group having 1 to 6 carbon atoms. ] The reflective film for a display of the above 7, which is a polycarbonate containing a repeating unit represented by the following.

10. The reflection layer is mainly composed of Al, and C
u, Ti, Zr, Hf, Nb, Ta, Cr, Mo, M
The reflective film for a display according to any one of 1 to 9 above, which contains at least one alloying element selected from the group consisting of n, Nd, Ni, Pd and Au.

11. The reflective film for a display according to any one of 1 to 10 above, wherein the resin layer P is mainly composed of an acrylic resin containing a unit represented by the following formula (4).

[Chemical 9]

12. The reflective film for a display according to any one of 1 to 11 above, wherein a resin layer R is formed between the transparent conductive layer and the transparent polymer film.

13. The resin layer A is formed between the transparent polymer film and the reflective layer
12 reflective films for displays.

14. The reflective film for a display according to any one of 1 to 13 above, wherein the resin layer A is mainly composed of an acrylic polymer containing a unit represented by the following formula (5).

[Chemical 10]

15. The reflective film for a display according to any one of 1 to 14 above, wherein a colored layer is formed between the transparent conductive layer and the reflective layer.

16. A liquid crystal display device using the reflective film for a display according to any one of 1 to 15 above.

17. The in-plane retardation R (550) [nm] for light having a wavelength of 550 nm satisfies the following formula (I): a reflective layer on one surface of the transparent polymer film, and a resin layer P in contact with the reflective layer. A laminated film having a water vapor permeability of 1 g / day / m ² or less and an oxygen permeability of 10 cc / day / m ² under an environment of 40 ° C. and 90% RH, the transparent polymer film having the other surface thereof. A laminated film for a display, which is suitable as a reflective film for a display by forming a transparent conductive layer for an electrode. R (550)> 30 (I)

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below.

The transparent polymer film of the present invention is preferably one having good transparency and heat resistance and a birefringence index having a specific in-plane retardation. Here, the in-plane retardation is R
The difference Δn between nx and ny with respect to the light having a wavelength of 550 nm and the film thickness, which is represented by (550) and is represented by three-dimensional refractive indices nx, ny and nz of the transparent polymer film, where z is the thickness direction of the film. It is represented by the product Δn · d of d and satisfies the above formula (1), that is, the in-plane retardation is 30 nm or more. Among them, those satisfying any one of the following items are preferable. Using a transparent polymer film having a specific in-plane retardation represented by the following formula (II), a black display is obtained when a voltage is applied to the liquid crystal layer. When the reflective film for a display of the present invention is used for a polarizing plate type LCD, high contrast is obtained, which is preferable.

(100 + 275 × N) <R (550) <(180 + 275 × N) (II) [N is a natural number including 0 in the above formula (II)] A specific formula (III) When a transparent polymer film having an in-plane retardation is used, a white display is obtained when a voltage is applied to the liquid crystal layer. The use of an electroreflective film is preferable because high contrast can be obtained.

(220 + 275 × N) <R (550) <(420 + 275 × N) (II I) [N is a natural number including 0 in the above formula (III)] Specific expression represented by the following formula (IV) The use of the transparent polymer film having the in-plane retardation is suitable because a high contrast can be obtained when the reflective film for a display of the present invention is used in a single polarizing plate type LCD using the STN mode.

(360 + 275 × N) <R (550) <(620 + 275 × N) (IV) [N is a natural number including 0 in the above formula (IV)] The high ratio constituting the transparent polymer film of the present invention. As the molecule, for example, polyester resin, polycarbonate resin, polyarylate resin, polysulfone, polyether sulfone, polysulfone resin such as polyallylsulfone, polyolefin resin, amorphous polyolefin resin, acetate resin such as cellulose triacetate, Polyacrylate resins and various thermosetting resins are preferable. Above all, from the viewpoint of transparency, heat resistance, and easy control of the in-plane retardation, a polycarbonate resin is used as a main component (50 wt% or more, preferably 80 wt% or more).
% Or more) is more preferable. The polycarbonate-based resin obtained by a casting method is particularly suitable because it has excellent surface flatness.

Examples of the polycarbonate resin include, for example, a polycarbonate resin substantially composed of a repeating unit represented by the following formula (1).

[0030]

[Chemical 11]

In the above formula (1), R _{1 to} R ₈ are each independently selected from a hydrogen atom, a halogen atom and a hydrocarbon group having 1 to 6 carbon atoms, and X is a hydrocarbon group having 1 to 15 carbon atoms. is there.

Examples of the halogen atom include chlorine atom, bromine atom, fluorine atom and the like.

Examples of the hydrocarbon group having 1 to 6 carbon atoms include alkyl groups having 1 to 6 carbon atoms such as methyl group, ethyl group and cyclohexyl group, and aryl groups such as phenyl group.

Specific examples of X include methylene, 1,1-ethylene, 2,2-propylene, 2,2-butylene, 2,2- (4-methyl) pentylene, and 1,1 as aliphatic groups. -Cyclopentylene, 1,1-cyclohexylene, 1,1- (3,3,5-trimethyl) cyclohexylene, norbornane-2,2-diyl, tricyclo [5.2.1.0 ^2,6 ] decane -8,8'-diyl, especially 2,2-propylene, 1,1 because of easy availability of raw materials
-Cyclohexylene and 1,1- (3,3,5-trimethyl) cyclohexylene are preferably used. Further, as an araalkylene group, phenylmethylene, diphenylmethylene, 1,1- (1-phenyl) ethylene, 9,9-
Fluorenylene can be mentioned. Further, as the haloalkylene group, 2,2-hexafluoropropylene, 2,2-
(1,1,3,3-Tetrafluoro-1,3-dicyclo) propylene and the like are preferably used. These may be one kind or two or more kinds.

One of preferred polycarbonates is a polycarbonate containing a repeating unit represented by the following formula (2).

[0036]

[Chemical 12]

In the above formula (2), R ^{9 to} R ¹⁴ are each independently at least one selected from a hydrogen atom, a halogen atom and a hydrocarbon group having 1 to 6 carbon atoms.

As the halogen atom and the hydrocarbon group having 1 to 6 carbon atoms, the same ones as described in the above formula (1) can be used.

As such a polycarbonate, in the repeating unit represented by the above formula (2) and the repeating unit represented by the above formula (1), R _{1 to} R ₈ are all hydrogen atoms, and X is a propylene group. What is essentially composed of a so-called repeating unit derived from bisphenol A is preferable in terms of heat resistance, moldability, transparency, dimensional stability and the like. In this case, the repeating unit represented by the above formula (2) is more preferably 10 to 90 mol%, further preferably 30 to 80 mol%, and further preferably 40 to 7 mol% of the whole repeating unit.
0 mol% is particularly preferred. By setting the repeating unit represented by the above formula (2) to 10 mol% or more, a glass transition temperature of 160 ° C. or more and excellent heat resistance can be obtained, and particularly dimensional change and in-plane retardation change after high temperature heating. Is less. However, when the repeating unit represented by the formula (2) is 90 mol% or more, the light transmittance is lowered and the film becomes brittle, which is not preferable.

Other preferred polycarbonates include
Examples include polycarbonates containing a repeating unit represented by the following formula (3).

[0041]

[Chemical 13]

In the above formula (3), R ^{17 to} R ²⁴ are each independently a hydrogen atom, a halogen atom and a carbon number of 1 to 6.
Is at least one selected from the hydrocarbon groups of

As the halogen atom and the hydrocarbon group having 1 to 6 carbon atoms, the same ones as described in the above formula (1) can be used.

As such a polycarbonate, in the repeating unit represented by the above formula (3) and the repeating unit represented by the above formula (1), R _{1 to} R ₈ are all hydrogen atoms, and X is a propylene group. What is essentially composed of a so-called repeating unit derived from bisphenol A is preferable in terms of heat resistance, moldability, transparency, dimensional stability and the like. In this case, the repeating unit represented by the above formula (3) is more preferably 10 to 90 mol%, further preferably 30 to 80 mol%, and further preferably 40 to 7 mol% of the whole repeating unit.
0 mol% is particularly preferred. By setting the repeating unit represented by the above formula (3) to 10 mol% or more, excellent optical isotropy, a glass transition temperature of 170 ° C. or more and excellent heat resistance are obtained, and water absorption rate and water vapor permeability are obtained. Becomes smaller, the surface hardness is also improved, and in particular, dimensional changes and in-plane retardation changes after high temperature heating are reduced. In particular, when the repeating unit represented by the above formula (3) accounts for 55 to 70 mol% of the entire repeating unit, the value of the in-plane retardation of the transparent polymer film for visible light having a shorter wavelength than light having a wavelength of 550 nm. Is divided by the value of the in-plane retardation of the transparent polymer film for light having a wavelength of 550 nm, which is smaller than 1.
It shows particularly preferable characteristics for obtaining an achromatic display LCD.
Further, the repeating unit represented by the above formula (1) is 90 mol%
If it is above the range, the light transmittance is lowered and the film becomes brittle, which is not preferable.

Films using the above polycarbonates have very small dimensional changes before and after heat treatment at high temperature for a long time. Therefore, for example, the shrinkage rate after heat treatment at 120 ° C. for 2 hours is 0.4% or less as compared with that before heat treatment,
A reflective film for display having a change rate of R (550) of 20% or less can be obtained.

The number average molecular weight of these polycarbonates is preferably 30,000 or more. A polymer having a higher molecular weight has improved mechanical properties and heat resistance.

The transparent polymer film (S) has a thickness of 0.
The range of 01 to 1.0 mm is preferable, and 0.02 to 0.7
The range of mm is more preferable. If the thickness is less than 0.01 mm, it has insufficient rigidity and is easily deformed during panel processing, which makes it difficult to handle. On the other hand, if it is larger than 1.0 mm, it becomes difficult to obtain the characteristics such as weight reduction and thickness reduction of the panel due to the use of the transparent polymer film.

As the reflective layer in the present invention, for example, A
l, Ag, Au, Mg, Ti, Cr, Ni, Cu, Z
Examples include metals such as n, Zr, and Pd, and alloys of two or more of these metals. In particular, Al as a main component, Cu, Ti, Zr, Hf, Nb, Ta, C
A reflective layer containing at least one alloy element selected from r, Mo, Mn, Nd, Ni, Pd, and Au is preferable from the viewpoint of good reflectance and corrosion resistance. Among them, 90% or more of Al, Ti, T
A reflective layer made of an Al alloy containing at least one of a, Cr, and Nd in a proportion of 10 at% or less is more preferable from the viewpoint of good adhesion and gas barrier property in addition to reflectance and corrosion resistance.

As a method for forming these reflective layers,
For example, vacuum film formation such as vacuum vapor deposition method, sputtering method, and ion plating method can be applied.

The thickness of the reflective layer is preferably 5 nm to 200 nm. When the thickness is 5 nm or less, sufficient reflectance cannot be obtained, and when the thickness exceeds 200 nm, the stress of the reflective layer causes the entire reflective film to be easily deformed. The reflectance of the reflective film for a display of the present invention increases as the film thickness of the reflective layer increases, but the preferred reflectance is 30% or more, and the film thickness depends on the reflective characteristics of the above-mentioned material used as the reflective layer. Adjust. When a polymer film is used as a substrate for an LCD, it is usually necessary to form a gas barrier layer on the film in order to secure the reliability of the panel.
The reflective layer can also be expected to have an effect as a gas barrier layer.
In particular, when a reflective layer containing Al as a main component and containing at least one or more alloy elements selected from Ti, Ta, Cr, and Nd and the thickness of the reflective layer is 10 nm or more, 40 ° C. 90% Water vapor permeability under RH environment is less than 1 g / m ² / day and oxygen permeability is 10 cc
A reflective film for display having a gas barrier property of / day / m ² or less can be obtained.

The reflective film for display of the present invention has at least one resin layer P on the reflective layer. Such a resin layer functions as a protective layer that protects the reflective layer, and has particularly high chemical resistance. It is also important to have transparency and good interlayer adhesion. Examples of the resin forming the resin layer include thermosetting resins such as epoxy resins, radiation curable resins such as ultraviolet curable acrylic resins, siloxane resins, melamine resins, urethane resins, and alkyd resins. Can be mentioned.

Among these, an acrylic resin containing an acryloyl group is preferable from the viewpoint of productivity. The radiation-curable resin may use one kind of resin or a mixture of several kinds of resins, but it has two or more acryloyl groups in the molecule or unit structure from the viewpoint of solvent resistance. It is preferable to use an acrylic resin having a polyfunctional acrylate component. Examples of such polyfunctional acrylate resins include dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate,
Examples thereof include various acrylate monomers such as pentaerythritol tetraacrylate, pentaerythritol triacrylate, and trimethylolpropane triacrylate, and polyester-modified or urethane-modified polyfunctional acrylate oligomers, but are not limited thereto.

As the resin layer (P) formed on the particularly preferable reflective layer, a resin layer (P) containing 50 to 99 wt% of an acrylic polymer containing at least a unit represented by the following formula (4) is used. Good adhesion to the reflective layer, for example, when using the reflective film for a display of the present invention as a liquid crystal panel substrate, corrosion of the reflective layer is extremely unlikely to occur even if it is treated with acid or alkali in the manufacturing process. Therefore, it is preferable.

[0054]

[Chemical 14]

When the ultraviolet curing method is used, an appropriate amount of a known photoreaction initiator is added to the above radiation curable resin.
For example, diethoxyacetophenone, 2-methyl-1-
Acetophenone compounds such as (4- (methylthio) phenyl) -2-morpholinopropane, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexylphenylketone, benzoin,
Examples thereof include benzoin compounds such as benzyl dimethyl ketal, benzophenone, benzophenone compounds of benzoylbenzoic acid, and thioxane compounds such as thioxanthone and 2,4-dichlorothioxanthone. Further, in order to further improve the curability, it is also effective to add an appropriate amount of a known reaction initiation aid such as triethanolamine, methyldiethanolamine, ethyl 4-dimethylaminobenzoate and the like.

The film thickness of the resin layer (P) is generally 0.0
It can be appropriately selected from the range of 1 to 20 μm, preferably 0.03 to 10 μm.

A silane coupling agent or the like may be added to such a resin layer (P) for the purpose of imparting further adhesion and solvent resistance.

In the reflective film for a display of the present invention, in order to protect the transparent polymer film from chemicals such as a solvent used when assembling a liquid crystal display element and forming electrodes, a transparent conductive layer and a transparent polymer film are provided between Alternatively, a resin layer R may be formed as a chemical resistant layer. Examples of the resin layer R include a thermosetting resin such as an epoxy resin, a radiation curable resin such as an ultraviolet curable acrylic resin, a vinyl alcohol polymer and a silicon compound such as an epoxy group-containing silicon compound and an amino group-containing silicon compound. Examples thereof include thermosetting silicon-containing vinyl alcohol-based resins, siloxane-based resins, melamine-based resins, urethane-based resins, alkyd resins and the like obtained by mixing the contained compounds with each other and heating to cause a crosslinking reaction.

The epoxy resin is preferably a novolac type epoxy resin from the viewpoint of solvent resistance. As a curing agent for curing such an epoxy resin, known materials can be applied. For example, curing agents such as amine-based, polyaminoamide-based, acids and acid anhydrides, imidazole, mercaptan, and phenol resin are used. Among them, from the viewpoint of solvent resistance, optical properties, thermal properties, etc., polymers containing acid anhydrides and acid anhydride structures or aliphatic amines are preferably used, and more preferably polymers containing acid anhydrides and acid anhydride structures. Is. Further, in order to increase the reaction rate, it is preferable to add an appropriate amount of a known curing catalyst such as a tertiary amine or imidazole.

The radiation-curable resin refers to a resin that is cured by being irradiated with radiation such as ultraviolet rays and electron beams. Specifically, it does not contain an acryloyl group, a methacryloyl group, a vinyl group or the like in a molecule or a single structure. It is a resin containing a saturated double bond. Among these, an acrylic resin containing an acryloyl group is particularly preferable from the viewpoint of reactivity. The radiation-curable resin may use one kind of resin or a mixture of several kinds of resins, but it has two or more acryloyl groups in the molecule or unit structure from the viewpoint of solvent resistance. It is preferable to use an acrylic resin having a polyfunctional acrylate component. Examples of such polyfunctional acrylate resins include various acrylate monomers such as dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, and trimethylolpropane triacrylate, and polyester-modified or urethane-modified polyacrylate monomers. Examples thereof include functional acrylate oligomers, but are not limited thereto.

When an acrylic resin is used as such a radiation-curable resin, tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltrimethoxysilane is used for the purpose of imparting further adhesion and solvent resistance. Ethoxysilane, ethyltrimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, dimethyldimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3
-Glycidoxypropyltriethoxysilane, (3,4
-Epoxycyclohexyl) ethyltrimethoxysilane, (3,4-epoxycyclohexyl) ethyltriethoxysilane, aminomethyltriethoxysilane, 3-
Aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N-aminomethyl-3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N-
(2-Aminoethyl) -3-aminopropyltriethoxysilane, N-methylaminopropyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, N-
A UV-curable silicon-containing acryl in which a hydrolyzate of an alkoxysilane such as (2-aminoethyl) -3-aminopropylmethyldimethoxysilane is mixed in a range of 75% by weight or less in terms of solid content. A system resin is suitable. The mixing ratio of the alkoxysilane is 75% by weight
On the other hand, if it exceeds the range, the solvent resistance and the curability tend to decrease, which is not preferable.

When the ultraviolet curing method is used, an appropriate amount of a known photoreaction initiator is added to the above radiation curable resin.
For example, diethoxyacetophenone, 2-methyl-1-
Acetophenone compounds such as (4- (methylthio) phenyl) -2-morpholinopropane, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexylphenylketone, benzoin,
Examples thereof include benzoin compounds such as benzyl dimethyl ketal, benzophenone, benzophenone compounds of benzoylbenzoic acid, and thioxane compounds such as thioxanthone and 2,4-dichlorothioxanthone. Further, in order to further improve the curability, it is also effective to add an appropriate amount of a known reaction initiation aid such as triethanolamine, methyldiethanolamine, ethyl 4-dimethylaminobenzoate and the like.

As the thermosetting silicon-containing vinyl alcohol resin, a curable resin containing a polyvinyl alcohol polymer and a silicon-containing compound can be preferably used.
In particular, it is more preferable to use an epoxy group-containing silicon compound and / or an amino group-containing silicon compound as the silicon-containing compound because the adhesion and chemical resistance are very excellent. Here, as the polyvinyl alcohol-based polymer, a known commercially available product can be applied, for example, a polymer containing 50 mol% or more of at least one selected from the group consisting of a vinyl alcohol component and a vinyl alcohol copolymer component is applied. It In addition, as this vinyl alcohol copolymer,
Examples thereof include a vinyl alcohol-vinyl acetate copolymer, a vinyl alcohol vinyl butyral copolymer, an ethylene-vinyl alcohol copolymer, and a polyvinyl alcohol polymer having a silyl group in the molecule.

The epoxy group-containing silicon compound is, for example, 3
-Glycidoxypropyltrimethoxysilane, 2-
(Partial) hydrolyzates such as (3,4-epoxycyclohexyl) ethyltrimethoxysilane, their (partial) condensates, and mixtures thereof. These compounds may be used alone or in combination of two or more.

The amino group-containing silicon compound is a silicon compound having an amino group and an alkoxysilyl group, for example, 3-
Aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N-methyl-3-aminopropyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxy Examples thereof include (partial) hydrolyzates such as silane and N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, their (partial) condensates, and mixtures thereof. These compounds may be used alone or in combination of two or more.

The mixing ratio of the epoxy group-containing silicon compound and the amino group-containing silicon compound is 1/6 <A / B in terms of the epoxy group molar equivalent conversion amount A and the amino group molar equivalent conversion amount B.
It is preferably within the range of <6/1. If the mixing ratio is out of this range, the adhesion, heat resistance, solvent resistance, water resistance and durability will deteriorate. When such a mixture of the epoxy group-containing silicon compound and the amino group-containing silicon compound is mixed with the polyvinyl alcohol-based polymer, they are mixed so that the weight ratio of the solid content after curing is 20% by weight or more. If the amount is less than 20 parts by weight, water resistance and chemical resistance are poor. When the thermosetting silicon-containing vinyl alcohol-based resin is laminated in contact with the above-mentioned inorganic gas barrier layer, the gas barrier property is further improved, and the display deterioration is caused even when left in a high temperature and high humidity environment for a long time. It is preferable because it is less likely to occur.

Examples of the siloxane resin include tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane and 3-methacryloxypropyltrimethoxy. Silane, 3-mercaptopropyltrimethoxysilane, dimethyldimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, (3,4-epoxycyclohexyl) ethyltrimethoxysilane, (3,3 4-epoxycyclohexyl) ethyltriethoxysilane, aminomethyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N
-Aminomethyl-3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropyltriethoxysilane, N-methylamino Obtained by subjecting an organic silicon compound such as propyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane or a hydrolyzate thereof to a so-called sol-gel reaction Is preferred.

These compounds may be used alone or in combination of two or more. Above all, a mixture of the above-mentioned epoxy group-containing silicon compound and the above-mentioned amino group-containing silicon compound is preferable. Here, the mixing ratio of the epoxy group-containing silicon compound and the amino group-containing silicon compound is 55 in terms of the epoxy group molar equivalent conversion amount A and the amino group molar equivalent conversion amount B.
It is preferably used within the range of / 45 <A / B <95/5 from the viewpoint of chemical resistance and interlayer adhesion.

The film thickness of the resin layer (R) is generally 0.0
It can be appropriately selected from the range of 1 to 20 μm, preferably 0.03 to 10 μm.

In the reflective film for display of the present invention, a resin layer A may be formed between the reflective layer and the transparent polymer film as an adhesive layer for the purpose of enhancing the adhesiveness between the two. Examples of the resin layer A include thermosetting resins such as epoxy resins, radiation curable resins such as ultraviolet curable acrylic resins, siloxane resins, melamine resins, urethane resins, and alkyd resins. You can

Among these, an acrylic resin containing an acryloyl group is preferable from the viewpoint of productivity. The radiation-curable resin may use one kind of resin or a mixture of several kinds of resins, but it has two or more acryloyl groups in the molecule or unit structure from the viewpoint of solvent resistance. It is preferable to use an acrylic resin having a polyfunctional acrylate component. Examples of such a polyfunctional acrylic resin include various acrylate monomers such as dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, and trimethylolpropane triacrylate, and polyester-modified or urethane-modified resins. Examples include, but are not limited to, polyfunctional acrylate oligomers.

The particularly preferable resin layer (A) is an acrylic resin layer (A) containing 1 to 50 wt% of an acrylic resin containing at least a unit represented by the following formula (5).
However, it is particularly good for improving the adhesion between the reflective layer and the transparent polymer film. For example, when the reflective film for a display of the present invention is used as a liquid crystal panel substrate, it is treated with an acid or an alkali in the manufacturing process. However, corrosion of the reflective layer is extremely unlikely to occur, which is preferable.

[0073]

[Chemical 15]

When the ultraviolet curing method is used, an appropriate amount of a known photoreaction initiator is added to the above radiation curable resin.
For example, diethoxyacetophenone, 2-methyl-1-
Acetophenone compounds such as (4- (methylthio) phenyl) -2-morpholinopropane, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexylphenylketone, benzoin,
Examples thereof include benzoin compounds such as benzyl dimethyl ketal, benzophenone, benzophenone compounds of benzoylbenzoic acid, and thioxane compounds such as thioxanthone and 2,4-dichlorothioxanthone. Further, in order to further improve the curability, it is also effective to add an appropriate amount of a known reaction initiation aid such as triethanolamine, methyldiethanolamine, ethyl 4-dimethylaminobenzoate and the like.

The film thickness of the resin layer (A) is generally 0.0
It can be appropriately selected from the range of 1 to 20 μm, preferably 0.03 to 10 μm.

A silane coupling agent or the like may be added to such a resin layer (A) for the purpose of imparting further adhesiveness and solvent resistance. Further, the resin layer (A) may contain an appropriate amount of siloxane-based fine particles and various plastic-based fine particles for the purpose of imparting light scattering properties.

The reflective film for display of the present invention comprises
As described above, a reflective film and a resin layer P are provided in this order on one surface of a transparent polymer film, and a laminated film having excellent gas barrier properties is provided on the other surface, for example, a substrate for a liquid crystal panel. A transparent conductive layer serving as an electrode when used as is. As the transparent conductive layer, a known metal film, metal oxide film or the like can be applied, but among them, the metal oxide film is preferable from the viewpoint of transparency, conductivity and mechanical properties. For example, metal oxide films such as indium oxide added with tin, tellurium, cadmium, molybdenum, tungsten, fluorine, zinc and germanium as impurities, cadmium oxide and tin oxide, zinc oxide added with aluminum as impurities, titanium oxide, etc. Can be mentioned. Among them, indium oxide as a main component and one or more kinds of oxides selected from the group consisting of tin oxide and zinc oxide are included, and 2 to 20% by weight of tin oxide and / or zinc oxide is contained. The transparent conductive layer containing 2 to 20% by weight is transparent,
It has excellent conductivity and is preferably used.

As a method of forming the transparent conductive layer, a sputtering method is mainly used, and a direct current sputtering method, a high frequency magnetron sputtering method, an ion beam sputtering method and the like can be applied. From the viewpoint of productivity, the magnetron sputtering method is preferable. . The thickness of the transparent conductive layer is
The thickness is preferably 10 to 1000 nm in order to obtain sufficient conductivity.

When the reflective film for a display of the present invention is used as a substrate for an LCD capable of color display, at least one layer is provided between the transparent conductive layer and the reflective layer constituting the reflective film for a display of the present invention. It is preferable to provide the colored layer. Here, the colored layer means R (red), G (blue), B (green) or M suitable for color display.
It is preferable to have three primary colors of (magenta), C (cyan), and Y (yellow). Further, a black matrix may be formed in order to improve contrast and prevent color mixture of the colored layer. The colored layer is preferably formed by a so-called pigment dispersion method or dye dispersion method, which is formed by patterning a resin to which a pigment such as a pigment or dye is added.
Further, the colored layer may be formed using a conventional technique such as a printing method, a dyeing method, or an electrodeposition method.

In the reflective film for a display of the present invention, the reflective layer is excellent in gas barrier property, but in order to secure more sufficient gas barrier property, for example, polyvinyl alcohol such as polyvinyl alcohol or ethylene-vinyl alcohol copolymer is used. -Based polymers, polyacrylonitrile, styrene-polyacrylonitrile-based copolymers such as acrylonitrile copolymers, or known organic polymer-based transparent gas barrier layers such as polyvinylidene chloride, Si, Al, Ti, Mg, Ca , Li, Zr, Z
Transparent inorganic thin film materials such as oxides, fluorides, nitrides, oxynitrides of at least one metal selected from n, In, Ce, Ta, etc., or two or more metals and mixtures or compounds thereof are used. It may be provided on the reflective film of the present invention. Among them, as the inorganic thin film material, a silicon oxide thin film containing silicon and oxygen as main components, a thin film containing silicon, oxygen and nitrogen as main components, or silicon and oxygen as main components and containing at least fluorine and magnesium. A thin film in which silicon and fluorine are chemically bonded is preferable in terms of gas barrier property and transparency. Here, the ratio of oxygen atoms to silicon atoms is preferably 1.5 or more and less than 2. Due to this ratio, the transparency and gas barrier properties of the thin film change in a trade-off relationship, and if it is less than 1.5, the transparency required for display applications may not be obtained. The composition of these thin films is analyzed and determined by X-ray photoelectron spectroscopy, X-ray microspectroscopy, Auger electron spectroscopy, Rutherford backscattering, or the like. Further, the chemical bonding state of the fluorine element present in the gas barrier film is, for example, X-ray photoelectron spectroscopy, using the Kα ray of Al as the X-ray source, and measuring the neutral carbon
When the horizontal axis is corrected at 84.6 eV, the chemical bond state of fluorine is F1s peak (a) derived from the bond between fluorine and silicon observed in the vicinity of 687 eV and about 1.5 eV from this peak.
Presence of F1s peak (b) derived from the binding of fluorine and magnesium observed on the low binding energy side, and
It is determined by these intensity ratios.

As a method for forming a gas barrier layer using an inorganic thin film material, for example, a vapor phase in which a material is deposited from a vapor phase such as a sputtering method, a vacuum vapor deposition method, an ion plating method and a plasma CVD method to form a film. A deposition method can be used.
Particularly, when the inorganic thin film material is used as the gas barrier layer, the film thickness is preferably in the range of 2 nm to 1 μm. If the thickness of the gas barrier layer is less than 2 nm, it is difficult to uniformly form a film, and a portion where the film is not formed is generated, so that the gas permeability becomes large. On the other hand, when the thickness is more than 1 μm, not only the transparency is deteriorated but also when the substrate is bent, cracks are generated in the gas barrier layer to increase the gas permeability.

Such a reflective film for a display of the present invention comprises the above-mentioned transparent polymer film (S), transparent conductive layer (E), reflective layer (M), protective layer (P), chemical resistant layer (R). , Adhesive layer (A), and colored layer (C), for example, (E) / (S) / (M) / (P), (E) / (R)
/ (S) / (M) / (P), (E) / (S) / (A) /
(M) / (P), (E) / (R) / (S) / (A) /
(M) / (P), (E) / (C) / (S) / (M) /
(P), (E) / (S) / (C) / (M) / (P),
(E) / (C) / (R) / (S) / (M) / (P),
(E) / (R) / (C) / (S) / (M) / (P),
(E) / (R) / (S) / (C) / (M) / (P),
(E) / (C) / (S) / (A) / (M) / (P),
(E) / (S) / (C) / (A) / (M) / (P),
(E) / (C) / (R) / (S) / (A) / (M) /
(P), (E) / (R) / (C) / (S) / (A) /
(M) / (P), (E) / (R) / (S) / (C) /
It is preferable that they are laminated in a layer structure of (A) / (M) / (P).

When a gas barrier layer (B) made of an inorganic thin film material is applied, for example, (E) / (B) /
(R) / (S) / (M) / (P), (E) / (R) /
(S) / (M) / (B) / (P), (E) / (B) /
(R) / (S) / (A) / (M) / (P), (E) /
(R) / (S) / (A) / (B) / (M) / (P),
(E) / (R) / (S) / (A) / (M) / (B) /
(P), (E) / (B) / (C) / (S) / (M) /
(P), (E) / (C) / (S) / (M) / (B) /
(P), (E) / (B) / (C) / (R) / (S) /
(M) / (P), (E) / (C) / (R) / (S) /
(M) / (B) / (P), (E) / (B) / (C) /
(R) / (S) / (A) / (M) / (P), (E) /
(C) / (R) / (S) / (A) / (M) / (B) /
(P), (E) / (B) / (R) / (C) / (S) /
(A) / (M) / (P), (E) / (R) / (C) /
It is preferable that the layers are laminated in the configuration of (S) / (A) / (M) / (B) / (P).

It should be noted that, within a range that does not impair the effects of the present invention, chemical treatment such as lamination of various undercoat layers for enhancing adhesion between the respective layers, or physical treatment such as corona treatment, plasma treatment and UV irradiation. A treatment method may be performed. When the transparent conductive substrate of the present invention is handled in the form of a film roll, a layer for imparting slipperiness to the film is provided on the surface opposite to the surface on which the transparent conductive layer is laminated, or knurling treatment is also effective. .

The reflective film for display of the present invention comprises
By using it as an electrode substrate of a liquid crystal display element or the like, it is possible to obtain a liquid crystal display element having a simpler device configuration and manufacturing process and thinner than conventional ones. Examples of liquid crystal display elements include a normally-polarized LCD that uses normally white TN mode, which produces a black display when a voltage is applied to the liquid crystal layer, or a white when a voltage is applied to the liquid crystal layer. Examples include a single-polarizing plate type LCD that uses normally black TN mode for display, and further, a single-polarizing plate type LCD that uses STN mode. On these LCDs,
By applying the reflective film for a display of the present invention, a high contrast and thin liquid crystal display device can be obtained. Further, the reflective film for a display of the present invention uses a guest-host mode of polymer dispersion type, phase transition type or the like which does not require a polarizing plate, or one polarizing plate is used.
It is also suitable for the CB (voltage control birefringence type) mode.

[0086]

EXAMPLES The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. In the examples, parts and% are based on weight unless otherwise specified. Further, various measurements in the examples were performed as follows. (1) Oxygen permeability: Oxytran 2 / manufactured by MOCON
20ML, 90% relative humidity in the temperature range of 40 ℃
The oxygen permeability in the was measured. The measurement was performed on the laminated film before forming the transparent conductive layer. (2) Water vapor transmission rate: MOCON, Permatran W
1A was used to measure the water vapor permeability in a temperature range of 20 to 50 ° C. (293 to 323 K) at a relative humidity of 100%. The measurement was performed on the laminated film before forming the transparent conductive layer. (3) Reflectance: Measured using a spectrophotometer U-4000 manufactured by Hitachi. (4) In-plane retardation: a wavelength of 550 n by a spectroscopic ellipsometer, trade name "M150" manufactured by JASCO Corporation.
The measurement was performed in a state where the incident light of m and the film surface were orthogonal to each other. (5) Measurement of thickness: Measured with an electronic micrometer manufactured by Anritsu Corporation. (6) Glass transition temperature: TA Instruments
The measurement was performed at a temperature rising rate of 20 ° C./min using a “DSC2920 modulated DSC” manufactured by the company.

The following abbreviations were used for the compound names shown below. BisA: 2,2-bis (4-hydroxyphenyl) propane BCF: 9,9-bis (4-hydroxy-3-methylphenyl) fluorene IP: 3,3,5-trimethyl-1,1-di (4- Phenol) Cyclohexylidene ITO: Indium-tin oxide DCPA: Dicyclopentanyl diacrylate DTMPTA: Ditrimethylolpropane tetraacrylate AUA: Aromatic urethane acrylate UA: Urethane acrylate

Example 1 Bisphenol component is Bis
A polycarbonate resin consisting of A and having an average molecular weight of 37,000 and a Tg of 155 ° C. was dissolved in methylene chloride so as to be 20% by weight. Then, this solution was cast on a polyester film having a thickness of 175 μm by a die coating method. Then, it was dried in a drying oven until the residual solvent concentration reached 13% by weight, and peeled from the polyester film. Then, the obtained polycarbonate film is stretched in the flow direction in a drying oven at a temperature of 155 ° C. so that the vertical and horizontal tensions are as little as possible, and dried until the residual solvent concentration in the film reaches 0.3% by weight. Thus, a transparent polymer film having an in-plane retardation R (550) of 140 nm and a thickness of 100 μm was obtained.

On one surface of the thus obtained polycarbonate film, a reflecting layer having a thickness of 50 nm was formed by using a target of Al containing 2 at% of Ti by a DC magnetron sputtering method.

Subsequently, as a coating composition for providing the protective layer (resin layer P), 90 parts by weight of DCPA and DTM were used.
5 parts by weight of PTA, 100 parts by weight of 1-methoxy-2-propanol and 8 parts by weight of 1-hydroxycyclohexyl phenyl ketone as an initiator were mixed, and the mixture was coated on the reflective layer and heated at 60 ° C. for 1 minute. After that, photocuring was performed with a high pressure mercury lamp at an integrated light amount of 700 mJ / m ² , and the thickness was 4 μm.
m protective layer was formed.

Further, as a coating composition for providing a chemical resistant layer (resin layer R), 20 parts by weight of DCPA, UA
10 parts by weight of 1-methoxy-2-propanol
Parts by weight and 2 parts by weight of 1-hydroxycyclohexyl phenyl ketone as an initiator are mixed and applied to the surface opposite to the surface on which the protective layer is formed by coating,
After heating at ℃ for 1 minute, use a high-pressure mercury lamp to add up to 700
Photocuring was performed at mJ / m ² to form a chemical resistant layer having a thickness of 4 μm.

Then, a transparent conductive layer of indium-tin oxide having a thickness of 120 nm was provided by the DC magnetron sputtering method to obtain a reflective film for a display. The shrinkage change rate of this reflective film before and after heating at 120 ° C. for 2 hours was 0.3%, and the change rate of R (550) was 8%. The laminated film before the transparent conductive layer of the display film was measured and found to have an oxygen permeability of 1 cc / m ² / day or less,
The water vapor transmission rate was 1 g / m ² / day or less.

In addition to the reflective film for a display prepared as described above, a gas barrier layer made of SiO ₂ is provided in place of the reflective layer of the reflective film for a display, and a transparent electrode having a polymer film R (550) of 15 nm is provided. I made a film.

Using the reflective film for a display as a lower substrate and the transparent electrode film as an upper substrate and these films and a polarizing plate having a thickness of 200 μm, a normally white TN mode single polarizing plate type reflective LCD
It was created. The configuration is shown in FIG. Excellent contrast
An extremely thin liquid crystal display device having a panel thickness of more than 400 μm was obtained.

[Example 2] BisA / IP = 40/60
DCPA was used as a coating composition for giving an adhesive layer (resin layer A) with R (550) of 320 nm using a polycarbonate copolymer having a Tg of 205 ° C. (molar ratio).
70 parts by weight, AUA 20 parts by weight, 1-methoxy-2
-100 parts by weight of propanol and 8 parts by weight of 1-hydroxycyclohexyl phenyl ketone as an initiator were mixed, and this was coated on the reflection layer and heated at 60 ° C for 1 minute, and then the integrated light amount was 700 mJ / m using a high pressure mercury lamp. ^A reflective film for a display was obtained in the same manner as in Example 1 except that photocuring was performed in ² and an adhesive layer having a thickness of 4 μm was formed between the transparent polymer film and the reflective layer.

In addition to the reflective film for a display prepared above, a gas barrier layer made of SiO ₂ is laminated instead of the reflective layer of the reflective film for a display,
A transparent electrode film having a polymer film R (550) of 15 nm was prepared.

These films were prepared in the same manner as in Example 1,
When a normally black TN mode single polarizing plate type reflective LCD was made by using a polarizing plate having a thickness of 200 μm, the contrast was excellent and the panel thickness was 400.
An extremely thin liquid crystal display device having a size of a little over μm was obtained.

[Example 3] BisA / BCF = 40/6
A reflective film for a display was obtained in the same manner as in Example 1 except that a polycarbonate copolymer having a Tg of 0 ° C (molar ratio) of 220 ° C was used.

In addition to the reflective film for a display prepared above, a gas barrier layer made of SiO ₂ is laminated instead of the reflective layer of the reflective film for a display,
A transparent electrode film having a polymer film R (550) of 15 nm was prepared.

Using these films and a polarizing plate having a thickness of 200 μm, a normally white TN mode single polarizing plate type reflective LCD was prepared, and it was found that the contrast was extremely excellent, and the panel thickness was 400 μm or more, which was extremely thin. The liquid crystal display element of was obtained.

[Comparative Example 1] As a polymer film, R
A display film was obtained in the same manner as in Example 1 except that a polycarbonate film having an isotropic property of (550) of 15 nm was used.

Further, a gas barrier layer made of SiO ₂ was laminated in place of the reflective layer of the display film to prepare a transparent electrode film having a polymer film R (550) of 15 nm.

In the same manner as in Example 1, these films,
In order to create a normally white TN mode single polarizing plate type reflective LCD using a polarizing plate having a thickness of 200 μm, a retardation plate having a thickness of about 100 to 200 μm is required. The manufacturing process becomes complicated, and the element becomes thicker by the amount of the retardation plate.

Comparative Example 2 A display film was obtained in the same manner as in Example 1 except that a gas barrier layer made of SiO ₂ was laminated instead of the reflective layer in the display reflective film of Example 1.

In addition, R (5
A transparent electrode film having a thickness of 50) of 15 nm was prepared.

These films were prepared in the same manner as in Example 1.
In order to create a normally white TN mode single polarizing plate type reflective LCD using a polarizing plate having a thickness of 200 μm, a reflecting plate having a thickness of about 100 μm is required, which complicates the manufacturing process of the display element. The element becomes thicker by the amount of the reflector.

[0107]

According to the present invention, a transparent conductive layer is formed on one surface of a transparent polymer film, a reflective layer is formed on the other surface, and at least one resin layer (P) is formed on the reflective layer. In addition, the in-plane retardation R (550) [nm] for light with a wavelength of 550 nm satisfies a specific expression, which is a reflective film for a display, which is used as an electrode substrate for a liquid crystal display device or the like. In this case, the good corrosion resistance, adhesion, and gas barrier property of the reflective layer are maintained even after the paneling process, and above all, the element structure and manufacturing process can be simplified, so it is much thinner than the conventional one and the manufacturing cost is high. Thus, a liquid crystal display device having low

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a liquid crystal display device using a reflective film for a display of the present invention.

FIG. 2 is a schematic diagram showing a layer structure of an upper substrate 2 of the liquid crystal display element in Example 1.

FIG. 3 is a schematic diagram showing a layer structure of a lower substrate 4 of the liquid crystal display element in Example 1.

[Explanation of symbols]

1: Polarizing plate 2: Upper substrate 3: Liquid crystal layer 4: Lower substrate 11: Resin layer (P) 12: Gas barrier layer 13: Transparent polymer film (in-plane retardation: 15 nm) 14: Resin layer (R) 15: Transparent conductive layer 21: Transparent conductive layer 22: Resin layer (R) 23: Transparent polymer film (in-plane retardation: Examples 1 and 3)
Is 140 nm, Example 2 is 320 nm) 24: reflective layer 25: resin layer (P)

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G02B 5/30 G02B 5/30 4J029 G02F 1/1335 520 G02F 1/1335 520 1/13363 1/13363 1 / 1343 1/1343 // C08L 101: 00 C08L 101: 00 (72) Inventor Tokuaki Saito 4-3-2 Asahigaoka, Hino-shi, Tokyo Inside Teijin Ltd. Tokyo Research Center (72) Inventor, Akihiko Uchiyama Tokyo, Hino City Asahigaoka 4-3 2 Teijin Ltd. Tokyo Research Center (72) Inventor Toshiaki Yatabe 4-3 Asahigaoka Tokyo Hino City Teijin Ltd. Tokyo Research Center F-term (reference) 2H042 DA02 DA11 DA17 DA21 DC02 DE00 2H049 BA02 BB42 BB63 BC03 BC22 2H091 FA11X FA11Y FA14Y FB08 LA11 LA12 2H092 HA03 PA01 PA10 PA12 4F006 AA36 AB73 AB74 BA00 BA07 C A08 DA01 4J029 AA09 AB01 AC01 AC02 AD01 AE03 BB12A BB13A BB15A BD09A BG08Y

Claims (17)

[Claims] 1. A transparent conductive film is formed on one surface of a transparent polymer film having an in-plane retardation R (550) [nm] with respect to light having a wavelength of 550 nm, and the other surface is formed on the other surface. A reflective film for a display, in which a reflective layer and a resin layer P are sequentially formed in contact with the reflective layer. R (550)> 30 (I) 2. The reflective film for a display according to claim 1, wherein the transparent polymer film satisfies the following formula (II). (100 + 275 × N) <R (550) <(180 + 275 × N) (II) [In the above formula (II), N is a natural number including 0.] ] 3. The reflective film for a display according to claim 1, wherein the transparent polymer film satisfies the following formula (III). (220 + 275 × N) <R (550) <(420 + 275 × N) (II I) [N is a natural number including 0 in the above formula (III). ] 4. The reflective film for a display according to claim 1, wherein the transparent polymer film satisfies the following formula (IV). (360 + 275 × N) <R (550) <(620 + 275 × N) ... (IV) [In the above formula (IV), N is a natural number including 0] 5. The shrinkage change rate before and after the heat treatment at 120 ° C. for 2 hours is 0.4% or less, and the change rate of R (550) is 2 or less.
It is 0% or less, The reflective film for displays in any one of Claims 1-4 characterized by the above-mentioned. 6. A reflectivity of 30% or more.
The reflective film for a display according to any one of 1. 7. The transparent polymer film has the following formula (1): [In the above formula (1), R _{1 to} R ₈ are each independently selected from a hydrogen atom, a halogen atom and a hydrocarbon group having 1 to 6 carbon atoms, and X is a hydrocarbon group having 1 to 15 carbon atoms. ] The reflection film for displays according to any one of claims 1 to 6 which consists of polycarbonate which consists of a repeating unit represented by these. 8. A polycarbonate is represented by the following formula (2): [In the above formula (2), R ^{9 to} R ¹⁴ are each independently at least one selected from a hydrogen atom, a halogen atom, and a hydrocarbon group having 1 to 6 carbon atoms. ] It is polycarbonate containing the repeating unit represented by these, The reflective film for displays of Claim 7 characterized by the above-mentioned. 9. The polycarbonate has the following formula (3): [In the above formula (3), R ^{17 to} R ²⁴ are each independently at least one selected from a hydrogen atom, a halogen atom, and a hydrocarbon group having 1 to 6 carbon atoms. ] It is polycarbonate containing the repeating unit represented by these, The reflective film for displays of Claim 7 characterized by the above-mentioned. 10. The reflective layer contains Al as a main component, and Cu, T
i, Zr, Hf, Nb, Ta, Cr, Mo, Mn, N
The reflective film for a display according to claim 1, further comprising at least one alloying element selected from the group consisting of d, Ni, Pd and Au. 11. The resin layer P has at least the following formula (4):
The reflective film for a display according to claim 1, which is mainly composed of an acrylic resin containing a unit represented by: [Chemical 4] 12. The reflective film for a display according to claim 1, wherein a resin layer R is formed between the transparent conductive layer and the transparent polymer film. 13. The resin layer A is formed between the transparent polymer film and the reflective layer.
The reflective film for a display according to any one of 2. 14. The reflective film for a display according to claim 1, wherein the resin layer A is mainly composed of an acrylic polymer containing a unit represented by the following formula (5). . [Chemical 5] 15. The reflective film for a display according to claim 1, wherein a colored layer is formed between the transparent conductive layer and the reflective layer. 16. A liquid crystal display device using the reflective film for a display according to claim 1. 17. A reflective layer on one surface of a transparent polymer film having an in-plane retardation R (550) [nm] with respect to light having a wavelength of 550 nm satisfying the following formula (I), and a resin layer in contact with the reflective layer. A laminated film in which P is formed in order, the water vapor permeability in an environment of 40 ° C. and 90% RH is 1 g / day / m ² or less, and the oxygen permeability is 10 cc / day / m ^2, which is a transparent polymer film. A laminated film for a display suitable as a reflective film for a display by forming a transparent conductive layer for an electrode on the other surface. R (550)> 30 (I)