Illumination – Display backlight – Lcd backlight
Reexamination Certificate
2006-12-26
2006-12-26
Husar, Stephen F (Department: 2875)
Illumination
Display backlight
Lcd backlight
C362S241000, C362S246000, C362S330000, C349S064000
Reexamination Certificate
active
07152988
ABSTRACT:
A liquid crystal display device comprises a liquid crystal panel having two substrates and a liquid crystal material sealed therebetween; a backlight module disposed under the liquid crystal panel; and a display case for housing the liquid crystal panel and the backlight module. The backlight module is a direct point-light type and comprises a plurality of point light sources, a reflector, a diffuser and a plurality of optical sheets. The reflector has a plurality of openings respectively positioned in relation to the point light sources such that the light provided by the point light sources can pass through the openings of the reflector and then reach the diffuser. The diffuser has a plurality of dot elements which are formed thereon and compose at least one of radially variable dot specific pattern. The radially variable dot specific pattern defines a center portion, and at least one of the point light sources is aligned relative to the center portion of the radially random dot specific pattern.
REFERENCES:
patent: 5886759 (1999-03-01), Mashino et al.
patent: 6099134 (2000-08-01), Taniguchi et al.
patent: 7014351 (2006-03-01), Leu et al.
Chi Mei Optoelectronics Corp.
Husar Stephen F
Thomas Kayden Horstemeyer & Risley
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