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Antiglare polarizing plate and image display device

A polarizing plate and anti-glare technology, which is applied in the direction of polarizing elements, nonlinear optics, electronic equipment, etc., can solve the problem of low contrast of the anti-glare layer, achieve the suppression of uneven quality, reduce the thickness, suppress glare effect

Inactive Publication Date: 2017-04-26
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the internal haze imparted to the anti-glare layer will significantly reduce the contrast

Method used

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  • Antiglare polarizing plate and image display device
  • Antiglare polarizing plate and image display device
  • Antiglare polarizing plate and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0186] (A) Preparation of polarizing film

[0187] A polyvinyl alcohol film with a thickness of 75 μm, a degree of polymerization of 2400, and a degree of saponification of 99.9% or more is uniaxially stretched to a stretching ratio of 5 times in a dry manner, and while maintaining tension, each 100 parts by weight of water contains 0.05 In an aqueous solution of iodine in parts by weight and potassium iodide in 5 parts by weight, it was immersed at a temperature of 28° C. for 60 seconds. Then, it was dipped 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 while maintaining the tense state. Thereafter, it was washed with pure water at 15° C. for 10 seconds. The film after washing with water was dried at 70° C. for 300 seconds while maintaining the tensioned state to obtain a polarizing film. The film thickness of this polarizing f...

Embodiment 2

[0206] An antiglare polarizing plate B and a liquid crystal display device B were produced in the same manner as in Example 1 except that the thickness of the adhesive layer was 25 μm. The total thickness of this antiglare polarizing plate B was 95 μm.

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Abstract

An antiglare polarizing plate which includes both a polarizing film that comprises a polyvinyl alcohol-based resin and an antiglare layer formed on the polarizing film and which exhibits a total haze of 1% or less and has a thickness of 100μm or less, characterized in that: the antiglare layer is provided with a fine rugged surface having fine ruggedness on the side opposite to the polarizing film; and the second derivative of common logarithm of one-dimensional power spectrum (H2(f)) of height of the fine rugged surface with respect to spatial frequency (f), d2logH2(f) / df2, is less than 0 at a spatial frequency of 0.01μm-1, and larger than 0 at a spatial frequency of 0.02μm-1.

Description

technical field [0001] The present invention relates to an antiglare polarizing plate and an image display device using the same. Background technique [0002] For image display devices such as liquid crystal displays or plasma display panels, Braun tube (cathode ray tube: CRT) displays, organic electroluminescent (EL) displays, if external light is reflected on the display surface, it will obviously damage the display surface. its visibility. In the past, in order to prevent the reflection of such extraneous light, in TVs and personal computers that value image quality, video cameras or digital cameras used outdoors with extraneous light intensity, mobile phones that use reflected light to display, etc., in order to prevent extraneous light The anti-glare polarizing plate is used on the surface of the image display device for the reflection. [0003] Anti-glare polarizing plates are required to exhibit anti-glare properties, exhibit good contrast when placed on the surfac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30B32B27/30G02B5/02G02F1/1335
CPCG02F1/133528B32B27/06B32B27/306B32B2307/408B32B2307/42B32B2457/20G02B5/0221G02F1/133502
Inventor 福井仁之古谷勉羽场康弘
Owner SUMITOMO CHEM CO LTD
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