Thin direct-lit backlight for LCD display

Details Thin direct-lit backlight for LCD display Thin direct-lit backlight for LCD display

2007-05-22

2007-05-22

Alavi, Ali (Department: 2875)

Illumination

Light fiber, rod, or pipe

Illuminating or display apparatus

C362S614000

Reexamination Certificate

active

11133504

ABSTRACT:
Direct-lit backlights and associated methods are disclosed in which an array of elongated light sources is placed in a cavity between a diffuser plate and a back reflector. The back reflector is a specular reflector that can have a divergence half-angle of about 10 degrees or less. The diffuser plate can be of the type that has uniform diffusing properties over its useful area. Appropriate placement of the diffuser plate, light sources, and back reflector can yield a backlight having exceptional thinness, brightness uniformity, and average brightness.

REFERENCES:
patent: 4310584 (1982-01-01), Cooper et al.
patent: 4791540 (1988-12-01), Dreyer et al.
patent: 5161041 (1992-11-01), Abileah et al.
patent: 5186530 (1993-02-01), Whitehead
patent: 5479328 (1995-12-01), Lee et al.
patent: 5720545 (1998-02-01), Shaw
patent: 5882774 (1999-03-01), Jonza et al.
patent: 6080467 (2000-06-01), Weber et al.
patent: 6341879 (2002-01-01), Skinner et al.
patent: 6416201 (2002-07-01), Strand et al.
patent: 6692137 (2004-02-01), Blanchard
patent: 6724446 (2004-04-01), Motomura et al.
patent: 6846089 (2005-01-01), Stevenson et al.
patent: 6905220 (2005-06-01), Wortman et al.
patent: 6971780 (2005-12-01), Lee et al.
patent: 2003/0184993 (2003-10-01), Yamada
patent: 2005/0001537 (2005-01-01), West et al.
patent: 08-136923 (1996-05-01), None
patent: 08-146415 (1996-06-01), None
patent: 2003-222864 (2003-08-01), None
patent: 10-2002-0067232 (2002-08-01), None
patent: 10-2002-0085836 (2002-11-01), None
patent: 10-2004-0019752 (2004-03-01), None
patent: WO 2005/078487 (2005-08-01), None
3M Specified Construction Products Department Technical Bulletin, “Optical Lighting Film Application Bulletin Thin Sign Box Sheets”, Effective Date: Feb. 1, 2001.
U.S. Application entitled “Direct-lit Liquid Crystal Displays with Laminated Diffuser Plates”, filed on Oct. 15, 2004, having U.S. Appl. No. 10/966,610.
U.S. Application entitled “Composite Diffuser Plates and Direct-lit Liquid Crystal Displays Using Same”, filed on Oct. 15, 2004, having U.S. Appl. No. 10/965,937.

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