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:
Sep. 08, 2009
Filed:
Aug. 05, 2005
Gi-cherl Kim, Yongin-si, KR;
Seock-hwan Kang, Suwon-si, KR;
Sang-yu Lee, Yongin-si, KR;
Ju-young Yoon, Suwon-si, KR;
Chun-ho Song, Seoul, KR;
Gi-Cherl Kim, Yongin-si, KR;
Seock-Hwan Kang, Suwon-si, KR;
Sang-Yu Lee, Yongin-si, KR;
Ju-Young Yoon, Suwon-si, KR;
Chun-Ho Song, Seoul, KR;
Abstract
A backlight for a display device includes a board, a plurality of light emitting diodes (LEDs) mounted on the board, and a light guiding plate that is provided on the LEDs and has light reflecting grooves formed directly on respective LEDs. The light reflecting grooves are formed at an upper surface of the light guiding plate, having a shape of a reversed cone. In this backlight, the light traveling directly upward from the LED is efficiently reflected by total internal reflection and then recycled, resulting in a uniform light distribution of the backlight.