The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 2007
Filed:
Jun. 17, 2005
Ying-tsung LU, Kaohsiung, TW;
Pong Lai, Tucheng, TW;
Ching-chin Wu, Taichung County, TW;
Chang-sheng Chu, Hsinchu, TW;
Ying-Tsung Lu, Kaohsiung, TW;
Pong Lai, Tucheng, TW;
Ching-Chin Wu, Taichung County, TW;
Chang-Sheng Chu, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
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.