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. 01, 2015
Filed:
Jul. 15, 2011
Jong Sun Kim, Seoul, KR;
Sang Jun Park, Seoul, KR;
Kyoung Soo Ahn, Seoul, KR;
Kyoung Jong Yoo, Seoul, KR;
Yong IN Lee, Seoul, KR;
Jong Sun Kim, Seoul, KR;
Sang Jun Park, Seoul, KR;
Kyoung Soo Ahn, Seoul, KR;
Kyoung Jong Yoo, Seoul, KR;
Yong In Lee, Seoul, KR;
LG INNOTEK CO., LTD., Seoul, KR;
Abstract
The present invention provides a light unit, comprising a printed circuit board equipped with a plurality of LEDs; and a light guide member equipped with mounting grooves to house the LEDs. It is preferred that the light guide member comprises one surface and another surface facing the one surface; a first density pattern area and a second density pattern area having higher density than that of the first density pattern area are formed in the one surface; and the second density pattern is disposed in an area closer to the light emitting surface of the LED than the first density pattern area. According to the present invention, hot spots can be removed by forming high density optical patterns on the upper surface of a light guide member and diffusing the light of LEDs; meanwhile, the transmission range of light can be extended and light extraction efficiency can be improved by disposing low density optical patterns in adjacent areas.