Surface light source device and liquid crystal display unit

Details Surface light source device and liquid crystal display unit Surface light source device and liquid crystal display unit

2007-06-18

2010-02-09

Mack, Ricky L (Department: 2875)

Illumination

Light fiber, rod, or pipe

Illuminating or display apparatus

C362S023000, C362S027000, C362S029000, C362S612000, C362S613000

Reexamination Certificate

active

07658529

ABSTRACT:
A surface light source device which illuminates a transmission-type liquid crystal display unit from the back surface includes P×Q surface light source units with individually controlled light sources. Each of the light sources includes a plurality of light-emitting element units. Each of the light-emitting element units includes at least one red light-emitting element that emits red light, at least one green light-emitting element that emits green light, and at least one blue light-emitting element that emits blue light. The center of mass of a luminance profile based on each of a plurality of red light-emitting elements, a plurality of green light-emitting elements, and a plurality of blue light-emitting elements in each surface light source unit substantially coincides with the center of mass of the surface light source unit.

REFERENCES:
patent: 7554625 (2009-06-01), Koganezawa
patent: 2005/0001537 (2005-01-01), West et al.
patent: 2005/0169007 (2005-08-01), Chou
patent: 10-2006-002275 (2006-07-01), None
patent: 2004-191490 (2004-08-01), None
patent: 2005-258403 (2005-09-01), None
patent: WO 2006/040937 (2006-04-01), None
patent: WO 2007/096817 (2007-08-01), None
Kakinuma et al., “Color Expression”, Nikkei Electronics, Dec. 20, 2004, No. 889, pp. 123-128.

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