Optical diffusion device

Details Optical diffusion device Optical diffusion device

2007-09-06

2011-11-01

Nelms, David (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S064000

Reexamination Certificate

active

08049845

ABSTRACT:
An optical diffusion device applied in a backlight module includes a plate. Multiple light sources are disposed on one side of the plate. Multiple optical microstructures provided with a longer axis and a shorter axis are disposed on the plate. The longer axis of each optical microstructure is approximately arranged in parallel with a direction extending from the light source, or, in other words, the shorter axis is arranged approximately crossing the direction extending from the light source. A diffusion effect is provided to each light source through the shorter axis of the optical microstructure to increase optical radiant energy among the light sources and to eliminate the dim and dark regions among the light sources for increasing general luminance of the backlight module.

REFERENCES:
patent: 6425673 (2002-07-01), Suga et al.
patent: 6606133 (2003-08-01), Okabe
patent: 6727963 (2004-04-01), Taniguchi et al.
patent: 6844913 (2005-01-01), Leidig
patent: 2004/0066476 (2004-04-01), Lee et al.
patent: 2004/0125269 (2004-07-01), Kim et al.

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