Polarizing plate and liquid crystal display unit

A technology of polarizing plates and polarizing plates, applied in the fields of polarizing plates and liquid crystal display devices, capable of solving problems such as deformation of polarizing plates and changes in hue

Active Publication Date: 2009-10-21
SUMITOMO CHEM CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0005] However, a polarizing plate laminated with a protective film formed of triacetyl cellulose through an adhesive formed of a polyvinyl alcohol-based resin on both sides or one side of a polarizing plate having a dichroic dye adsorbed and oriented will suffer under humid heat conditions with high humidity and temperature. Under the condition of use, the polarizing plate sometimes shrinks or swells and deforms, resulting in a change in hue

Method used

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  • Polarizing plate and liquid crystal display unit
  • Polarizing plate and liquid crystal display unit
  • Polarizing plate and liquid crystal display unit

Examples

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Embodiment 1

[0072] (a) Fabrication of a protective film having an inorganic particle layer

[0073] Weigh 650 g of Nissan Chemical Co., Ltd. silica gel (SNOWTEX (SNOWTEX) ST-XS (the average particle diameter measured by the Hills method is 4 to 6 nm, and the solid content concentration is 20% by weight)), 1300 g of Nissan Chemical Co., Ltd. The company's silica gel (Snodix ST-ZL) (average particle diameter measured by laser diffraction scattering method: 78nm, solid content concentration: 40wt%)) was mixed with 4550g of water and stirred to prepare an inorganic fine particle dispersion . This inorganic fine particle dispersion liquid was coated on a triacetyl cellulose film (thickness: 80 μm, in-plane Phase difference: 1 nm), dried at 60°C. The coating and drying operations were further performed 9 times on the laminated body to obtain a protective film in which the inorganic fine particle layer was laminated on the thermoplastic resin layer. The thickness of the inorganic fine particl...

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Abstract

A polarizing plate comprising a polarizer having two back-to-back surfaces, and one protection film layer, the polarizer consisting of resin film in which dichroic pigment molecules are adsorbed by being oriented uniaxially, the protection film layer being disposed on one surface of the polarizer, characterized in that the polarizing plate further has an inorganic fine particle layer containing inorganic fine particles on at least one surface of the polarizer. And, another polarizing plate comprising a polarizer having two back-to-back surfaces, and two protection film layers, the polarizer consisting of resin film in which dichroic pigment molecules are adsorbed by being oriented uniaxially, one of the protection film layers being disposed on one surface of the polarizer and the other protection film layer on the other surface of the polarizer, characterized in that the polarizing plate further has an inorganic fine particle layer containing inorganic fine particles on at least one surface of the polarizer. A liquid crystal display unit comprising a combination of these polarizing plates and liquid crystal cells is also provided.

Description

technical field [0001] The invention relates to a polarizing plate and a liquid crystal display device. Background technique [0002] Liquid crystal display devices are used in various display devices due to their features such as low power consumption, low-voltage operation, and light weight and thin profile. A liquid crystal display device is composed of a large number of materials such as a liquid crystal cell, a polarizing plate, a retardation film, a light concentrating film, a diffusing film, a light guide plate, and a light reflecting film. Therefore, improvement aimed at realizing productivity, weight reduction, brightness improvement, etc. by reducing the number of sheets constituting a film, or reducing the thickness of a film or a sheet is being made. [0003] Liquid crystal display devices require products that can withstand severe durability conditions depending on the application. For example, in a liquid crystal display device for a car navigation system, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/1335G02F1/13363
CPCG02F1/133528G02F2202/36G02F2201/54G02B5/3033G02F2202/28G02B5/3083B82Y20/00G02F2001/133311G02F1/133311G02B5/30G02F1/1335G02F1/13363
Inventor 涉田匠阪谷泰一
Owner SUMITOMO CHEM CO LTD
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