Optical member, polarizing plate set, and liquid crystal display apparatus

A technology of optical components and polarizers, applied in optical components, optics, nonlinear optics, etc., can solve problems such as color change and color shift

Inactive Publication Date: 2015-09-30
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a liquid crystal display device using such a polarizing plate integrated with a prism sheet involves a problem in that its hue changes in an oblique direction (that is, color shift occurs).

Method used

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  • Optical member, polarizing plate set, and liquid crystal display apparatus
  • Optical member, polarizing plate set, and liquid crystal display apparatus
  • Optical member, polarizing plate set, and liquid crystal display apparatus

Examples

Experimental program
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Effect test

example 1

[0146](Fabrication of film for the first retardation layer)

[0147] Using a tenter stretching (tenter stretching) machine, at a temperature of 158° C., a commercially available polymer film (manufactured by Optes Co., Ltd., trade name “ZeonorFilm ZF14-130”) whose main component is a cyclic polyolefin-based polymer was tested. ” (thickness: 60 μm, glass transition temperature: 136° C.)) was subjected to fixed-end uniaxial stretching in its width direction so that its film width became three times larger than the original film width (lateral stretching step). The resulting film is a negative biaxial plate (three-dimensional refractive index: nx>ny>nz) with the fast axis in the transport direction. The negative biaxial plate has an in-plane retardation of 118 nm and an Nz coefficient of 1.16.

[0148] (Making film for the second retardation layer)

[0149] Styrene-maleic anhydride copolymer pellet resin (manufactured by Nova Chemicals Japan Ltd., product name: "DYLARK D232") w...

example 2

[0165] A liquid crystal display device using the optical member of the present invention was produced in the same manner as in Example 1, except that the optical member was produced so that the thickness of the low-refractive index layer became 800 nm.

example 3

[0167] In the same manner as in Example 1, a liquid crystal display device using optical components was fabricated except that a low-refractive index layer was obtained in the following manner. That is, an airgel layer is formed on the surface of the prism sheet on the side opposite to the prism portion by utilizing the rebound phenomenon, and this layer is used as the low refractive index layer. The airgel layer was fabricated according to the procedure described in Example 1 of Japanese Patent Application Laid-Open No. 2006-011175.

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Abstract

Provided is an optical member that can realize a liquid crystal display apparatus that is excellent in mechanical strength and suppressed in color shift. The optical member includes: a polarizing plate; a reflective polarizer; a low refractive index layer having a selected refractive index; and a prism sheet.

Description

[0001] Cross application of related applications [0002] This application claims priority under Section 119 of 35 U.S.C to Japanese Patent Application No. 2014-073756 filed on March 31, 2014 and Japanese Patent Application No. 2015-004046 filed on January 13, 2015, Its content is hereby incorporated by reference. technical field [0003] The present invention relates to an optical component, a polarizing plate device and a liquid crystal display device. More particularly, the present invention relates to an optical component including a polarizing plate, a reflective polarizer, a low-refractive index layer having a selected refractive index, and a prism sheet, and a polarizing plate device and a liquid crystal display device each using the same. Background technique [0004] In recent years, liquid crystal display devices using surface light source devices have become very common as displays. For example, in a liquid crystal display device including an edge-light type sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335
CPCG02B5/3083G02F1/133528G02B5/045G02F1/133536G02F1/133507
Inventor 中村恒三宇和田一贵春田裕宗渊田岳仁武本博之村上奈穗服部大辅
Owner NITTO DENKO CORP
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