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Anti-reflection film and polarization plate containing the same

An anti-reflection film, polarizing plate technology, applied in polarizing elements, chemical instruments and methods, coatings, etc., can solve the problems of reflected light damage to display quality, insufficient anti-reflection performance, etc.

Inactive Publication Date: 2010-12-01
TORAY ADVANCED MATERIALS KOREA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, an antireflection film having an average reflectance of 0.4% or less in the wavelength range of 450 to 650 nm formed by vacuum deposition or sputtering discolors reflected light strongly to reddish to bluish purple, and if the light source behind the viewer, then this discolored reflected light impairs the display quality
On the other hand, the antireflection film formed by wet coating has an average reflectance of more than 1% although it has almost neutral color (neutral color) of reflected light, which is particularly outstanding in antireflection performance among them. It is not enough for applications where light is directly incident on the display surface

Method used

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  • Anti-reflection film and polarization plate containing the same
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  • Anti-reflection film and polarization plate containing the same

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Experimental program
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preparation example Construction

[0078] 1. Preparation of high hardness layer with high refractive index

[0079] 1.1 High hardness layer with high refractive index

[0080] As described above, the high-refractive high-hardness layer, which is an essential thin layer of the antireflection film of the present invention, has a refractive index of 1.50 to 1.60, more preferably 1.52 to 1.56. In order to produce a high-refractive-index high-hardness layer, although it is possible to use transparent thin layers of inorganic oxides formed by chemical vapor deposition (CVD) or physical vapor deposition (PVD), especially vacuum deposition or sputtering classified as PVD techniques , but thin layers formed by all-wet coating are preferred.

[0081] The high-refractive-index high-hardness layer is preferably formed by the following method: coating a coating composition, the coating composition comprising: titanium (Ti), zirconium (Zr), indium (In), Inorganic fine particles of at least one metal oxide among oxides of...

Embodiment 1

[0206] A 110-mesh gravure coater (gravure coater) was used to coat the coating composition for a high-refractive-index high-hardness layer on a triacetate cellulose substrate (TAC-TD80U, refractive index: 1.49, manufactured by Fuji Photo Film Co., Ltd.), dried at 100° C. for 2 minutes, and cured by irradiating with ultraviolet rays to form a high-refractive-index high-hardness layer having a thickness of 4.2 μm and a refractive index of 1.51.

[0207] Next, a coating composition for a low-refractive index layer was coated on the high-refractive-index high-hardness layer using a 180-mesh gravure coater, dried at 100° C. for 2 minutes, and cured by UV irradiation to A low refractive index layer having a thickness of 110 nm and a refractive index of 1.36 was formed. Thus the antireflection film of the present invention was obtained.

Embodiment 2

[0209] The coating composition for a high-hardness layer with a high refractive index was coated on a cellulose triacetate substrate (TAC-TD80U, refractive index: 1.49, manufactured by Fuji Photo Film Co. , Ltd.), dried at 100° C. for 2 minutes, and cured by irradiating with ultraviolet rays to form a high-refractive-index high-hardness layer having a thickness of 4.5 μm and a refractive index of 1.54.

[0210] Next, a coating composition for a low-refractive index layer was coated on the high-refractive-index high-hardness layer using a 180-mesh gravure coater, dried at 100° C. for 2 minutes, and cured by UV irradiation to A low refractive index layer having a thickness of 110 nm and a refractive index of 1.36 was formed. Thus the antireflection film of the present invention was obtained. The obtained antireflection film was evaluated according to the following method.

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Abstract

The present invention generally relate to an anti-reflection film and a polarization plate containing the same, particularly relate to the anti-reflection film having an excellent rainbow effect and low reflectivity by reducing amplitude of reflection spectrum, and the polarization plate containing the anti-reflection film. The anti-reflection film includes a cellulose triacetate (TAC) transparent base for protecting a polyvinyl alcohol (PVA) polaroid sheet; a high-hardness layer coated on the transparent base and having a high refractivity of 1.50-1.60 as well as antistatic function; and a low refractivity layer coated on the high-hardness layer by a wet method and having a refractivity of 1.31-1.40, wherein the anti-reflection film has an average specular reflectance of 0.1-1.40% in a wavelength range from 480-680nm at an incidence angle of 5 DEG.

Description

technical field [0001] The present invention relates generally to an antireflection film and a polarizing plate including the same, and more particularly to an antireflection film having an excellent rainbow effect and very low reflectance by reducing the amplitude of the wavelength of the reflection spectrum Anti-reflection film and polarizing plate including it. Background technique [0002] Generally, antireflection films are used in various image display devices such as liquid crystal displays (LCDs), plasma display panels (PDPs), electroluminescent displays (ELDs), and cathode ray tube displays (CRTs). Antireflection films are also used in eyeglass lenses and cameras. For such an antireflection film, a multilayer antireflection film having a laminate of transparent metal oxide thin layers is generally used. This thin transparent multilayer serves to prevent light reflection in the broadest possible wavelength range of the visible light range. [0003] The transparent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/11G02B5/30B32B23/08B32B7/02
CPCG02B1/11G02B1/16G02B5/30G02F1/133528G02F2201/38
Inventor 崔圭夏李文馥徐正泰严相烈
Owner TORAY ADVANCED MATERIALS KOREA
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