Optical waveguides – Illuminating or display apparatus
Reexamination Certificate
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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Chu Chang-Sheng
Lai Pong
Lu Ying-Tsung
Wu Ching-Chin
Font Frank G.
Hughes James P.
Industrial Technology Research Institute
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