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. 13, 2008
Filed:
Oct. 13, 2005
Di Feng, Beijing, CN;
Xing-peng Yang, Beijing, CN;
Guo-fan Jin, Beijing, CN;
Qiao-feng Tan, Beijing, CN;
Ying-bai Yan, Beijing, CN;
Shou-shan Fan, Beijing, CN;
Di Feng, Beijing, CN;
Xing-Peng Yang, Beijing, CN;
Guo-Fan Jin, Beijing, CN;
Qiao-Feng Tan, Beijing, CN;
Ying-Bai Yan, Beijing, CN;
Shou-Shan Fan, Beijing, CN;
Tsinghua University, Haidian District, Beijing, CN;
Hon Hai Precision Industry Co., Ltd., Tu-Cheng, Taipei Hsien, TW;
Abstract
An exemplary light guide plate () includes: a light incident portion () for receiving a light; a light reflecting portion () for reflecting the light input through the light incident portion; and a light emitting portion () opposite to the light reflecting portion, for outputting the reflected light. The light incident portion includes a first diffractive optical element () located thereat. The first diffractive optical element includes a plurality of protrusions () each having a curved surface, with the protrusions being arranged symmetrically opposite to each other across a central axis of symmetry of the first diffractive optical element. The light emitting portion may include a second diffractive optical element () located thereat. The second diffractive optical element includes a plurality of elongate protrusions, with the protrusions being arranged symmetrically opposite to each other across a central axis of symmetry of the second diffractive optical element.