Backlight assembly with improved brightness uniformity and...

Details Backlight assembly with improved brightness uniformity and... Backlight assembly with improved brightness uniformity and...

2009-07-21

2011-11-15

Husar, Stephen F (Department: 2875)

Illumination

Plural light sources

With modifier

C362S097100, C362S307000, C362S311010, C362S326000, C362S614000

Reexamination Certificate

active

08057066

ABSTRACT:
A backlight assembly and a display apparatus having the backlight assembly are disclosed. A diffusion plate is provided above a plurality of lamps. Diffusion patterns that cause contrast inversion and diffusion patterns that do not cause contrast inversion are arranged on a surface of a diffusion plate, in an alternating manner along a longitudinal direction of the lamps. Thus, a brightness difference between a first area in which the lamps are positioned and a second area between two adjacent lamps is reduced, thereby improving a brightness uniformity of light from the backlight assembly.

REFERENCES:
patent: 2004/0022050 (2004-02-01), Yamashita et al.
patent: 2007/0110386 (2007-05-01), Chiang
patent: 2008/0002098 (2008-01-01), Imajo et al.
patent: 2008/0180599 (2008-07-01), Ha et al.
patent: 07261029 (1995-10-01), None
patent: 2005-117023 (2005-04-01), None
patent: 2005-352400 (2005-12-01), None
patent: 1020000043518 (2000-07-01), None
patent: 2008061059 (2008-05-01), None

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