Optical film and liquid crystal display device using the film

Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only

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349 62, G02F 11343

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active

056004621

ABSTRACT:
The liminance within the viewing angle of an LCD device is increased by using an optical film of transparent material. The film has a first surface having a wave structure including a plurality of isosceles triangle prisms arranged side-by-side, and a second surface having an optically rough structure for performing diffuse transmission. The film may also have a first surface having a structure including a plurality of quadrangular prisms arranged side-by-side, and a second surface having an optically rough structure for performing diffuse transmission.

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"Polarized Backlight for Liquid Crystal Display", IBM Technical Disclosue Bulletin, vol. 33 No. 1B, Jun. 1990, pp. 143-144.

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