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:
Apr. 24, 2007
Filed:
Sep. 20, 2004
Applicants:
Charles Leu, Fremont, CA (US);
Wen-jeng Huang, Tu-chen, TW;
Jyh-chain Lin, Tu-Chen, TW;
Inventors:
Assignee:
Hon Hai Precision Ind. Co., Ltd., Taipei Hsien, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V 7/04 (2006.01); F21V 29/00 (2006.01); H01L 33/00 (2006.01); H01L 21/00 (2006.01); H01J 1/62 (2006.01);
U.S. Cl.
CPC ...
Abstract
A planar light source device () for a display device includes a light guide plate () and pluralities of light emitting diodes (). The light guide plate has a light incident surface (). The light emitting diodes are located in the vicinity of the light incident surface. Each light emitting diode has a light emission surface opposite to the light incident surface of the light guide plate, and has a diffraction grating () provided on the light emission surface for improving a range of divergence of light beams emitted therefrom.