Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2005-09-13
2005-09-13
Kim, Robert H. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S065000, C349S070000, C362S613000, C362S623000
Reexamination Certificate
active
06943857
ABSTRACT:
In a liquid crystal display device comprising a pair of linear light source arranged at respective side surface of a light guide plate opposite to one another and having brightness irregularity along longitudinal axes thereof, the present invention arranges the linear light sources to dispose respective ends thereof towards which the brightness thereof is decreased gradually diagonally over a main surface of the light guide plate, and provide two-dimensional optical reflection or diffusion pattern density of which is varied in accordance with the brightness irregularity thereof on at least one surface of the light guide plate, an optical diffusion sheet, or an optical reflection plate. The brightness irregularity appearing in a display screen of the liquid crystal display device due to the brightness irregularity of the linear light source is eliminated by the present invention.
REFERENCES:
patent: 5178447 (1993-01-01), Murase et al.
Matsumoto Shinji
Tsubokura Masaki
A. Marquez, Esq. Juan Carlos
Fisher Esq. Stanley P.
Hitachi , Ltd.
Kim Richard H
Kim Robert H.
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