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Antiglare film, antiglare polarizing plate, and image display device

An image display device, anti-glare film technology, applied in polarizing elements, nonlinear optics, optics, etc., can solve problems such as damage to visibility, and achieve the effects of low haze, sufficient anti-glare and glare suppression

Inactive Publication Date: 2016-06-01
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For image display devices such as liquid crystal display devices, organic electroluminescence (EL) display devices, plasma display panels, and Braun tube (cathode line tube: CRT) displays, if external light is reflected on the display surface, the would significantly impair its visibility

Method used

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  • Antiglare film, antiglare polarizing plate, and image display device
  • Antiglare film, antiglare polarizing plate, and image display device
  • Antiglare film, antiglare polarizing plate, and image display device

Examples

Experimental program
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Effect test

Embodiment 1

[0199] (A) Preparation of polarizing film

[0200] A polyvinyl alcohol film with a thickness of 75 μm, a degree of polymerization of 2400, and a degree of saponification of 99.9% is stretched to a stretching ratio of 5 times in a dry uniaxial manner, and kept in a tense state, containing 0.05 parts by weight of iodine and 0.05 parts by weight of iodine in every 100 parts by weight of water. It was immersed in an aqueous solution of 5 parts by weight of potassium iodide at a temperature of 28° C. for 60 seconds. Next, while maintaining the state of tension, it was immersed at a temperature of 73° C. for 300 seconds in a boric acid aqueous solution containing 7.5 parts by weight of boric acid and 6 parts by weight of potassium iodide per 100 parts by weight of water. After talking, wash with pure water at 15° C. for 10 seconds. The water-washed film was kept under tension and dried at 70° C. for 300 seconds to obtain a polarizing film.

[0201] (B) Fabrication of a mold for fo...

Embodiment 2

[0217] Mold B was produced in the same manner as in Example 1 except that the first etching amount at the time of mold production was 5 μm, and the second etching amount was 13 μm. Moreover, except having used the mold B, it carried out similarly to Example 1, and produced the antiglare film B, the antiglare polarizing plate B, and the liquid crystal display device B. The uneven surface-color filter distance L was 523 μm.

Embodiment 3

[0219] Used in mold making Figure 9 The mold C was produced in the same manner as in Example 1 except that the first etching amount was set to 4.5 μm for the pattern [exposure pattern C] shown. Except having used the mold C, it carried out similarly to Example 1, and produced the antiglare film C, the antiglare polarizing plate C, and the liquid crystal display device C. The uneven surface-color filter distance L was 520 μm.

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Abstract

The invention provides an antiglare film, an antiglare polarizing plate using the same, and an image display device. The antiglare film is provided with a transparent support and an antiglare layer stacked thereon and having a concave-convex surface. The elevation power spectrum of the concave-convex surface is over 1[mu]m2 at the spatial frequency 0.01[mu]m-1 and below 0.05[mu]m2 at the spatial frequency 0.033[mu]m-1.

Description

technical field [0001] The present invention relates to an antiglare film, an antiglare polarizing plate and an image display device using the antiglare film. Background technique [0002] For image display devices such as liquid crystal display devices, organic electroluminescence (EL) display devices, plasma display panels, and Braun tube (cathode line tube: CRT) displays, if external light is reflected on the display surface, the would significantly impair its visibility. An antiglare film is an optical film used to suppress reflection of such external light. The anti-glare film has an anti-glare layer having a fine uneven surface that contributes to suppressing reflection of external light, and is incorporated into an image display device so that the uneven surface faces the visible side. [0003] Japanese Unexamined Patent Publication No. 2014-119650 (Patent Document 1) discloses an antiglare polarizing plate in which an antiglare layer having a fine uneven surface is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G02B5/30G02F1/1335
CPCG02B1/10G02B5/3033G02F1/133528
Inventor 福井仁之
Owner SUMITOMO CHEM CO LTD
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