Diffusion plate and backlight module using same

Details Diffusion plate and backlight module using same Diffusion plate and backlight module using same

2011-01-18

2011-01-18

Ward, John A (Department: 2885)

Illumination

Display backlight

Lcd backlight

C362S333000, C362S628000

Reexamination Certificate

active

07871172

ABSTRACT:
A light diffusion plate includes a first surface and an opposite second surface. The first surface defines a plurality of first elongated arc-shaped grooves and a plurality of second elongated arc-shaped grooves therein. A width of the first elongated arc-shaped grooves decreases and a width of the second elongated arc-shaped grooves increase along the direction from one side to another side. The second surface forms a plurality of first elongated arc-shaped protrusions and a plurality of second elongated arc-shaped protrusions thereon. A width of the first elongated arc-shaped grooves decreases gradually and a width of the second elongated arc-shaped grooves increases gradually along the direction from one side to another side. A width of the first elongated arc-shaped protrusions decreases gradually and a width of the second elongated arc-shaped protrusions increases gradually along the direction from one side to another side.

REFERENCES:
patent: 7712945 (2010-05-01), Hsu et al.
patent: 7758199 (2010-07-01), Chang
patent: 2008/0043488 (2008-02-01), Lee et al.
patent: 2009/0086509 (2009-04-01), Omori et al.

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