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Phase retarder, a laminate polarizing plate, a method for producing thereof, and a liquid crystal display

A technology of phase retarder and polarizing plate, applied in the direction of polarizing components, instruments, layered products, etc.

Inactive Publication Date: 2009-03-25
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The inventors of the present invention intensively studied to solve such problems, and found that these problems can be solved by using a special resin as a binder for a phase retarder composed of a coating layer containing an organically modified clay compound constitution, the present inventors have thus completed the present invention

Method used

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  • Phase retarder, a laminate polarizing plate, a method for producing thereof, and a liquid crystal display
  • Phase retarder, a laminate polarizing plate, a method for producing thereof, and a liquid crystal display
  • Phase retarder, a laminate polarizing plate, a method for producing thereof, and a liquid crystal display

Examples

Experimental program
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Embodiment 1

[0131] (a) Production of coated phase retarders

[0132] Coating solutions having the following compositions were prepared.

[0133] Polyurethane resin varnish "SUB Lacquer 0866" 10%

[0134] Organic modified clay compound "Lucentite STN" 9%

[0135] Toluene 81%

[0136] The solid content concentration of the coating solution is 12%, and the solid content weight ratio of the organically modified clay composite to the polyurethane resin is 3 / 1. The prepared coating solution was coated with an applicator on a polyethylene terephthalate film having a thickness of 38 μm and subjected to release treatment (the water contact angle of the surface treated with the release agent was 110°) , followed by drying at 50° C. for 1 minute and then at 90° C. for an additional 3 minutes to obtain a phase retarder coated on the film. Measure the phase retardation value of the coating, and the measurement result is R 0 = 0.2 nm, R' = 94 nm. The haze of the phase retarder coated on the glass p...

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Abstract

The invention provides a phase retarder comprising a film which comprises a compound comprising an organic modified clay composite, and a urethane resin which comprises aliphatic diisocyanate, wherein the weight ratio of the former to the latter is more than 2 to less than 5.

Description

technical field [0001] The present invention relates to a phase retarder and a laminated polarizing plate using the phase retarder, methods of producing both, and a liquid crystal display including the phase retarder. Background technique [0002] Liquid crystal displays have properties of low power consumption, low driving voltage, light weight, and flat panels, and have rapidly spread to devices for displaying information such as displays for portable phones, handheld terminals, computers, and televisions. Due to the development of liquid crystal element technology, various modes of liquid crystal displays have been developed, and efforts have been made to solve the problems of liquid crystal displays related to response rate, contrast ratio, and narrow viewing angle. However, liquid crystal displays still have a problem of narrow viewing angles compared with cathode ray tubes (CRTs); therefore, various efforts have been made to widen their viewing angles. [0003] As a l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1335G02B5/30G02F1/13363
CPCG02F1/133634G02B5/3083B32B7/12B32B2307/42G02F1/133753
Inventor 永嶋彻九内雄一朗松冈祥树河村隆广
Owner SUMITOMO CHEM CO LTD