Liquid crystal display device having a diffuser integrally forme

Details Liquid crystal display device having a diffuser integrally forme Liquid crystal display device having a diffuser integrally forme

1996-06-10

1997-11-04

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

349 64, 349162, G02F 11335

Patent

active

056845502

ABSTRACT:
A liquid crystal display device in which a back light is arranged below a liquid crystal display panel having a plurality of pixels arrayed on a transparent substrate surface and in which a prism plate having a plurality of stripe grooves arrayed in parallel is arranged between the liquid crystal display panel and the back light. If the stripe grooves has a pitch .lambda..sub.1 (mm) and if the pixels in parallel with the stripe grooves has a pitch .lambda..sub.2 (mm), the liquid crystal display device is constructed to satisfy a relation of .lambda..sub.1 .ltoreq.0.075.lambda..sub.2 /(.lambda..sub.2 +0.075). This construction can increase the brightness of the back light and prevent the interference fringes from being formed on the display frame.

REFERENCES:
patent: 4791540 (1988-12-01), Dreyer, Jr. et al.
patent: 5390276 (1995-02-01), Tai et al.
patent: 5394255 (1995-02-01), Yokota et al.
patent: 5552907 (1996-09-01), Yokota et al.
patent: 5596429 (1997-01-01), Kokawa et al.
patent: 5600462 (1997-02-01), Suzuki et al.

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