Back light unit for a liquid crystal display device

Details Back light unit for a liquid crystal display device Back light unit for a liquid crystal display device

1998-12-17

2000-12-26

Cariaso, Alan

Illumination

Revolving

362330, 362339, F21V 800, F21V 502

Patent

active

06164790&

ABSTRACT:
A light guide panel of a back light unit for an LCD which is used for many display system includes a light guide which has a plurality of defined areas on the bottom surface and a uniform pattern. The uniform pattern has a geometrical shape in one area but the patterns of each defined area are different so as to provide a greatly improved brightness distribution.

REFERENCES:
patent: 5400224 (1995-03-01), DuNah et al.
patent: 5408388 (1995-04-01), Kobayashi et al.
patent: 5600455 (1997-02-01), Ishikawa et al.
patent: 5704703 (1998-01-01), Yamada et al.
patent: 5711589 (1998-01-01), Oe et al.
patent: 5797668 (1998-08-01), Kojima et al.
patent: 5926601 (1999-07-01), Tai et al.

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