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:
Oct. 28, 2014
Filed:
Dec. 08, 2011
Yune-hyoun Kim, Daejeon, KR;
Kwang-seung Park, Daejeon, KR;
Sang-choll Han, Daejeon, KR;
Sang-eun an, Daejeon, KR;
Yune-Hyoun Kim, Daejeon, KR;
Kwang-Seung Park, Daejeon, KR;
Sang-Choll Han, Daejeon, KR;
Sang-Eun An, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
Provided is a backlight unit. The backlight unit includes a light source, an optical member configured to uniformly distribute light emitted from the light source, and at least two condensing films configured to condense light from the optical member. Hetero-conic lenses are two-dimensionally arranged on a surface of each of the condensing films, and each of the hetero-conic lenses is formed by combining a first conic lens expressed by Formula (1) below and a second conic lens expressed by Formula (2) below: