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Optical film, polarizing plate and image display device

A technology of optical film and low refractive index layer, which is applied in the direction of optics, optical filters, polarizing elements, etc., can solve the problems of not obtaining optical film, etc., achieve high contrast, high scratch resistance, and achieve the effect of consistency

Active Publication Date: 2007-06-06
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In conventional known techniques, for example, in JP-A-11-326608, an optical film optimal for the above-mentioned problems has not been obtained

Method used

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  • Optical film, polarizing plate and image display device
  • Optical film, polarizing plate and image display device
  • Optical film, polarizing plate and image display device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0384] [Preparation method of optical film]

[0385]Although the optical film of the present invention can be prepared by the following method, it should not be considered that the present invention is limited thereto.

[0386] (Preparation of coating solution)

[0387] First, a coating solution for forming each layer is prepared. In that case, by reducing the volatilization amount of the solvent, it is possible to suppress the increase in the water content in the coating solution. The water content in the coating solution is preferably not more than 5%, and more preferably not more than 2%. The amount of solvent volatilization can be suppressed by, for example, improving the tightness when stirring various raw materials into the tank and reducing the contact area between the air and the coating solution during the liquid transfer work. In addition, it is possible to provide a measure for reducing the water content in the coating solution during the coating process or before or af...

Embodiment

[0518] The embodiments of the present invention will be described below, but it should not be considered that the invention is not limited to this.

[0519] Table 2

[0520] [Preparation of coating solution for hard coating]

[0521]

Raw material name

Coating solution name

HC-1

HC-2

HC-3

Binder

PET-30

40.1

34.9

34.9

DPHA

4.45

3.90

3.90

Granule

Monodisperse silica

(Monodisperse: 1.5μm)

-

5.67

-

Condensed silica

(Secondary aggregate particle size: 1.5μm)

-

-

5.67

Initiator

IRGACURE 184

1.34

1.17

1.17

IRGACURE 907

0.24

0.21

0.21

Leveling agent

FP-7

0.08

0.08

0.08

Solvent

Methyl isobutyl ketone

38.0

38.0

38.0

Cyclohexanone

16.1

16.1

16.1

Sum

100

100

100

[0522] ...

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Abstract

An optical film comprises: a transparent support; and at least one hard coat layer containing a translucent resin and a coagulating metal oxide particle, and having a surface haze value of from 0 to 12%, an internal haze value of from 0 to 35% and an Sm value of from 50 to 200 mum.

Description

Technical field [0001] Generally, in order to improve the display performance of display devices (for example, CRT, PDP, ELD, SED, and LCD) and provide protection performance, the optical film of the present invention is disposed on the outer surface of the display device. Background technique [0002] In a display device such as a liquid crystal display device (LCD), an optical film having a function of improving display performance or a function of improving protection performance is provided. For example, an optical film having a surface scattering layer (anti-glare layer) or a light interference layer (anti-reflection layer) is provided. [0003] In recent years, in liquid crystal televisions and the like, the increase in screen size and the improvement in performance (for example, high contrast and high definition) are making remarkable progress. Accordingly, there has been an urgent demand for optical films (surface films). [0004] Specifically, examples of requirements fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/00G02F1/133
CPCY10T428/24372Y10T428/1036G02F2201/50G02B5/3033G02F1/133504G02F1/133502G02F1/133528G02B5/3016C09K2323/03G02B5/30G02B5/20
Inventor 松永直裕伊藤忠井上力夫福重裕一
Owner FUJIFILM CORP
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