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:
May. 20, 2008
Filed:
Nov. 04, 2005
Di Feng, Beijing, CN;
Ying-bai Yan, Beijing, CN;
Guo-fan Jin, Beijing, CN;
Shou-shan Fan, Beijing, CN;
Di Feng, Beijing, CN;
Ying-Bai Yan, Beijing, CN;
Guo-Fan Jin, Beijing, CN;
Shou-Shan Fan, Beijing, CN;
Tsinghua University, Haidian District, Beijing, CN;
Hon Hai Precision Industry Co., Ltd., Tu-Chen, Taipei Hsien, TW;
Abstract
A light guide device includes a main body having a first incident surface, a second incident surface, an emitting surface, a reflecting surface and a plurality of first microstructures. The first incident surface is opposite to the second incident surface. The emitting surface extends from the first incident surface to the second incident surface. The reflecting surface is opposite to the emitting surface, and the plurality of first microstructures are formed on the reflecting surface and extend parallel to the first and second incident surface. A distribution density and relative size of the first microstructures progressively decrease along directions from a center of the reflecting surface toward the first and second incident surface, respectively. The present light guide device does not employ additional optical correcting elements and thus has a simple structure. A backlight module using the same light guide device is also provided.