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. 10, 2011
Filed:
May. 22, 2008
Applicants:
Zhanchang Bu, Beijing, CN;
Guannan Song, Beijing, CN;
Inventors:
Zhanchang Bu, Beijing, CN;
Guannan Song, Beijing, CN;
Assignee:
Beijing Boe Optoelectronics Technology Co., Ltd., Beijing, CN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V 7/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
There is provided a light emitting diode (LED) backlight device comprising a light guide plate and a light module composed of a plurality of LEDs. A haze structure is disposed between a light incident surface of the light guide plate and each LED. Haze value of the haze structure is varied with a high value at a position closing to an optical axis of the LEDs and a low value at a position further away from the optical axis of the LEDs.