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Liquid crystal display device

A technology of liquid crystal display device and liquid crystal layer, which is applied in the direction of instruments, polarizing elements, optics, etc., can solve the problems of large deviation of film optical properties, contact scratches on the film surface, etc., and achieve the effect of improving viewing angle characteristics

Inactive Publication Date: 2010-03-03
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the methods described in these documents 1, there are problems such as large variations in the optical properties of the film and contact scratches easily occurring on the surface of the film.

Method used

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Examples

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Embodiment

[0232]The present invention will be described in further detail below according to the examples. Materials, usage amounts, ratios, processing contents, processing procedures and the like shown in the following examples can be appropriately changed unless departing from the gist of the present invention. Therefore, the scope of the present invention is not limited to the specific examples shown below.

[0233] 1. Preparation of polymer film for retardation layer

[0234] - As a cycloolefin copolymer, the pellet of "TOPAS#6013" by Polyplastics was used. In addition, it was confirmed by the above method that "TOPAS#6013" has positive intrinsic birefringence and is an amorphous thermoplastic resin. Also, the glass transition temperature of this resin was 136°C.

[0235] ·Cellulose acetate propionate (CAP)

[0236] Cellulose acetate propionate (CAP) was produced according to the method described in Example 1 of JP-A-2006-348123, and granulated by a conventional method. The com...

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Abstract

An object of the invention is to provide a liquid crystal display device with an improved viewing angle characteristic. The liquid crystal display device comprising: a pair of polarizing layers disposed so that respective absorption axes thereof are orthogonal to each other; a liquid crystal cell comprising: a first substrate and a second substrate being disposed so that they face each other between the pair of the polarizing layers, at least one of which has a transparent electrode, and a liquid crystal layer disposed between the first substrate and the second substrate; and a retardation layer disposed between at least one of the pair of the polarizing layers and the liquid crystal cell, wherein an in-plane slow axis of the retardation layer is within the direction of 90+-40 degrees relative to to an absorption axis of the polarizing layer disposed at a closer position to the retardation layer; Re(550) meets following relation, 25 nm<=Re(550)<=230 nm; R[40 DEG ] of the retardation layer which is measured for incident light in a direction tilted by 40 degrees toward the tilt direction of the retardation layer relative to the normal line of the retardation layer meets following relation, 0 nm<=R[40 DEG ]<=300 nm; and R[+40 DEG ] of the retardation layer and retardation R[-40 DEG ] of the retardation layer meet following relation, 1<R[+40 DEG ] / R[-40 DEG ].

Description

technical field [0001] The present invention relates to improvement of viewing angle characteristics of liquid crystal display devices. Background technique [0002] Conventionally, in liquid crystal display devices, optical films exhibiting various optical properties depending on the mode of the liquid crystal display device have been used for optical compensation. For example, an optical compensation film having an optically anisotropic layer made of a liquid crystal composition on a transparent support made of a polymer film has been proposed as an optical compensation film for a TN mode liquid crystal display device (for example, Patent Document 1). [0003] In addition, as an alternative to an optical compensation film having an optically anisotropic layer composed of a liquid crystal composition, it has been proposed to use a polymer film whose optical axis is inclined in the thickness direction for optical compensation of a TN-mode liquid crystal display device. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335G02F1/13363G02B5/30
CPCG02F2413/01G02F1/13363G02F2413/08G02F2413/02G02F1/133371
Inventor 大室克文竹上龙太施泽民桥本齐和
Owner FUJIFILM CORP
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