Diffusion plate used in direct-type backlight module and...

Optical: systems and elements – Diffusing of incident light

Reexamination Certificate

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C359S900000, C359S619000, C359S620000

Reexamination Certificate

active

07414788

ABSTRACT:
The present invention relates to a diffusion plate used in a direct-type backlight module and a method for making the same. At least one of the surfaces of the diffusion plate has a microstructure constituted by repeated undulation that can refract and diffuse the incident light beams that enter the diffusion plate. Therefore, the paths of the light beams after entering the diffusion plate are changed, which raises the luminance of the backlight module.

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English Abstract of WO 2004/097466 of Nov. 11, 2004.

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