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:
Dec. 08, 2009
Filed:
Dec. 21, 2005
Man Hoan Lee, Kumi-shi, KR;
Ji Su Yoon, Seoul, KR;
Sung Keun Lee, Kumi-shi, KR;
Won Taek Moon, Seoul, KR;
Jun Kyu Paik, Seoul, KR;
Young Hun Jeong, Seoul, KR;
Man Hoan Lee, Kumi-shi, KR;
Ji Su Yoon, Seoul, KR;
Sung Keun Lee, Kumi-shi, KR;
Won Taek Moon, Seoul, KR;
Jun Kyu Paik, Seoul, KR;
Young Hun Jeong, Seoul, KR;
LG Display Co., Ltd., Seoul, KR;
Abstract
A back light unit is disclosed, which improves condensing efficiency of light and viewing angle characteristics. The back light unit includes at least one lamp generating light, a light guide plate emitting light across a surface thereof using the light generated from the lamp, a diffusion sheet arranged above the light guide plate to diffuse the light passing through the light guide plate, a first condensing sheet condensing the light from the diffusion sheet using a plurality of first elliptical condensing patterns arranged on the diffusion sheet in a first direction, and a second condensing sheet further condensing the light from the first condensing sheet using a plurality of second elliptical condensing patterns arranged on the first condensing sheet in a second direction crossing the first direction.