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Liquid crystal display device

A liquid crystal display device and liquid crystal cell technology, applied in optics, instruments, nonlinear optics, etc., can solve problems such as unsatisfactory durability, and achieve the effects of less warpage and less uneven display

Inactive Publication Date: 2011-11-30
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its durability is not yet satisfactory in environments that are more severe than expected practical situations, such as hot and humid environments

Method used

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Examples

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Embodiment 1

[0193] (a) Preparation of water-based adhesive

[0194] Dissolve 3 parts of carboxy-modified polyvinyl alcohol ("KL-318" from Kuraray, Ltd.) in 100 parts of water, and add 1.5 parts of polyamide epoxy resin (made from "Sumiraze Resin 650 (30)" available from Sumika Chemtex Co., Ltd., an aqueous solution having a solid content concentration of 30%) was used to prepare a water-based adhesive.

[0195] (b) Preparation of retardation film

[0196] A styrene-maleic anhydride copolymer resin (“Dylark D332” (trade name) sold by Nova Chemical, Tg=131° C.) was used as a core layer, and acrylic rubber particles with an average particle diameter of 200 nm were mixed with about 20% of methacrylic resin (resin used in "Technoloy S001" (trade name) sold by Sumitomo Chemical Co., Ltd., Tg = 105 ° C) was used as the skin layer, and three layers were co-extruded to obtain the core The resin 3-layer film of the skin layer is formed on both sides of the layer. This resin three-layer film was ...

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Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device having a small warpage of a liquid crystal panel and showing little display irregularity even after being left to stand in a humid and hot environment.SOLUTION: The liquid crystal display device is manufactured by stacking a front polarizing plate 20 on a viewing side of a liquid crystal cell 10 with a first adhesive layer 41, stacking a back side polarizing plate 30 on the other side with a second adhesive layer 42, and disposing a backlight unit 60 outside the back side polarizing plate. The back side polarizing plate 30 has a layer structure of, from the backlight unit 60 side, a first transparent protective film 32 / polarizing film 31 / second transparent protective film 33 / third adhesive layer 43 / retardation film 35. The retardation film 35 has a three-layer structure comprising a core layer 36 made of a styrene resin and skin layers 37 made of an acrylic resin composition containing rubber particles, applied on both faces of the core layer 36. All of the first adhesive layer 41, the second adhesive layer 42 and the third adhesive layer 43 are configured to have storage moduli at 50°C of 0.01 MPa or more and 0.1 MPa or less.

Description

technical field [0001] The present invention relates to a liquid crystal display device in which warping of a liquid crystal panel is reduced. Background technique [0002] In recent years, liquid crystal display devices have been rapidly popularized as information display devices such as mobile phones, mobile information terminals, computer monitors, and televisions, taking advantage of the advantages of low power consumption, low-voltage operation, light weight, and thin profile. With the development of liquid crystal technology, various modes of liquid crystal display devices have been proposed, and the problems of so-called response speed, contrast ratio, and narrow viewing angle liquid crystal display have been continuously solved. However, since a polarizing plate is used in a liquid crystal display device, when the liquid crystal panel is placed in a hot and humid environment, the polarizing plate absorbs water, causing the liquid crystal panel to warp, and display un...

Claims

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Application Information

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IPC IPC(8): G02F1/13363G02F1/1335G02B5/30
CPCC09J5/00G02F1/133528G02F1/1336G02F1/13363
Inventor 松本寿和申基渊
Owner SUMITOMO CHEM CO LTD
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