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Liquid crystal panel and liquid crystal display apparatus

A technology of liquid crystal panel and liquid crystal layer, which can be used in identification devices, televisions, optics, etc., and can solve problems such as insufficient improvement of oblique contrast ratio.

Active Publication Date: 2006-07-05
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technique improves color shift without sufficiently improving oblique contrast

Method used

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  • Liquid crystal panel and liquid crystal display apparatus
  • Liquid crystal panel and liquid crystal display apparatus
  • Liquid crystal panel and liquid crystal display apparatus

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0242] Preparation of anode plate A

[0243] [Reference Example 1]

[0244] A commercially available polymer film "ARTON G" (trade name, thickness 100 μm, glass transition temperature 171°C, weight average molecular weight 130,000, JSR Provided by Co., Ltd.) was uniaxially stretched 1.30 times in the longitudinal direction at 175°C (temperature measured at a distance of 3 cm from the back of the film, with a temperature fluctuation of ±1°C) in an air-circulating constant temperature furnace while fixing the longitudinal direction of the film to make a phase Poor film A. Table 1 shows the properties of the retardation film A obtained. Re[590] of the polymer film (before stretching) was 3 nm and Rth[590] was 7 nm.

[0245] [Reference Example 2]

[0246] As the retardation film B, a commercially available polymer film "Pureace WR" (trade name, thickness 78 μm, supplied by Teijin Corporation) containing polycarbonate as a main component and having a fluorene structure in the m...

Embodiment 1

[0273] The liquid crystal panel was taken out from a commercially available liquid crystal display device "KLV-17HR2" (manufactured by Sony Corporation) equipped with an IPS mode liquid crystal cell. The polarizing plates disposed above and below the liquid crystal cell were removed, and the glass surfaces (front and rear surfaces) of the liquid crystal cell were cleaned. Then, using an acrylic pressure-sensitive adhesive layer (20 μm in thickness), the retardation film E prepared in Reference Example 5 was adhered as the anode C plate to the surface on the viewing side of the liquid crystal cell, so that the retardation film E The slow axis of is parallel to (0°±0.2°) the longer side of the liquid crystal cell. Next, using an acrylic pressure-sensitive adhesive layer (10 μm in thickness), the retardation film B prepared in Reference Example 2 was adhered as an anode A plate to the surface of the retardation film E, so that the retardation of the retardation film B was slow. ...

Embodiment 2

[0277] A liquid crystal panel was prepared in the same manner as in Example 1, except that retardation film A was used instead of retardation film B as the anode A plate, so as to measure oblique contrast and oblique color shift. Table 3 shows the obtained properties.

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Abstract

A liquid crystal panel according to an embodiment of the present invention includes: a liquid crystal cell; a first polarizer arranged on one side of the liquid crystal cell; a second polarizer arranged on another side of the liquid crystal cell; a positive A plate and a positive C plate arranged between the liquid crystal cell and the first polarizer; and an isotropic optical element arranged between the liquid crystal cell and the second polarizer, wherein the positive A plate is arranged between the first polarizer and the positive C plate.

Description

[0001] This application claims the benefit of Japanese Patent Application No. 2004-355590 filed on December 8, 2004 and Japanese Patent Application No. 2005-240588 filed on August 23, 2005 under Title 35 Federal Code Section 119, The above documents are incorporated herein by reference in their entirety. technical field [0002] The invention relates to a liquid crystal panel with a liquid crystal unit, a polarizer and an optical element. In addition, the present invention relates to a liquid crystal television and a liquid crystal display device both using the liquid crystal panel. Background technique [0003] A liquid crystal display device configured with an in-plane switching (IPS) mode liquid crystal cell includes adjusting the light transmittance (white color) by applying a horizontal electric field to liquid crystal molecules that are aligned substantially horizontally without applying an electric field to rotate the liquid crystal molecules by about 45°. display) a...

Claims

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Application Information

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IPC IPC(8): G02F1/1335G02F1/1337G09F9/00H04N5/44
Inventor 中田美惠矢野周治小石直树小林显太郎
Owner NITTO DENKO CORP
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