Liquid crystal display device having high brightness and high co

Details Liquid crystal display device having high brightness and high co Liquid crystal display device having high brightness and high co

1998-06-17

1999-11-30

Dang, Hung Xuan

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349113, 349119, G02F 11335

Patent

active

059951800

ABSTRACT:
A liquid crystal display having high brightness and high contrast and being able to achieve a paper-white appearance is provided. The liquid crystal cell is interposed between a pair of polarizing plates. The upper polarizing plate separates an incident light into a reflected light and a transmitted light. A light which would be absorbed when the dichroic polarizing plate is used, is utilized as a reflected light, so that a high brightness can be obtained. The lower polarizing plate partly transmits incident light and absorbs the remaining part. A reflected light from the lower polarizing plate is removed, so that the possible occurrence of a reduction in contrast attributed to the phenomenon that the reflected light is reflected on the upper polarizing plate is prevented. The upper polarizing plate has a flat spectral characteristic with regard to the reflected light and the transmitted light, and a* value and b* value of which plate are each smaller than 1. Therefore, no coloring occurs in the reflected light and the transmitted light at the upper polarizing plate, so that the paper-white appearance can be easily achieved.

REFERENCES:
patent: 5422756 (1995-06-01), Weber
patent: 5684551 (1997-11-01), Nakamura et al.
patent: 5686979 (1997-11-01), Weber et al.
patent: 5828488 (1998-10-01), Ouderdik et al.
patent: 5899551 (1999-05-01), Neijzen et al.

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