Lighting device for display device and display device using...

Details Lighting device for display device and display device using... Lighting device for display device and display device using...

2011-08-30

2011-08-30

Bruce, David V (Department: 2875)

Illumination

Display backlight

C362S311040

Reexamination Certificate

active

08007122

ABSTRACT:
A backlight device includes a light guide plate opposed to fluorescent tubes, a diffusion sheet stacked on the light guide plate, and lens sheets further stacked on the diffusion sheet. A tip end of a corner portion of the diffusion sheet has a shape defined by removing a portion of the sheet along a straight line spanning between two sides constituting the corner portion. In first of the lens sheets, a tip end portion of a corner portion formed by two sides has a shape defined by removing a portion of the sheet in a larger amount than in the diffusion sheet by a circular arc which projects outward. In a second of the lens sheets, a tip end of a corner portion formed by two sides has a shape defined by removing a larger amount than in the first of the lens sheets along a straight line.

REFERENCES:
patent: 7731376 (2010-06-01), Takata
Takata; “Lighting device for display device and display device using the same”; U.S. Appl. No. 11/911,741, filed Oct. 17, 2007.

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