Backlight modules using diffraction optical elements

Details Backlight modules using diffraction optical elements Backlight modules using diffraction optical elements

2007-07-31

2007-07-31

Font, Frank G. (Department: 2883)

Optical waveguides

Illuminating or display apparatus

C385S037000

Reexamination Certificate

active

11154640

ABSTRACT:
Direct backlight modules using diffraction optical elements are provided. A direct backlight module includes a light source and a diffraction optical element, wherein the diffraction optical element is disposed above the light source. By properly arranging the phase function, the diffraction optical element can substantially modulate the wavefront of the light emitted from the light source and control light distribution as well as light direction.

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