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:
Aug. 12, 2014
Filed:
Oct. 18, 2011
Ikuko Imajo, Chiba, JP;
Sachiko Yamazaki, Chiba, JP;
Kikuo Ono, Chiba, JP;
Panasonic Liquid Crystal Display Co., Ltd., Hyogo, JP;
Abstract
A backlight unit has a light source area. The width of the light source area in a first direction is shorter than the width of a liquid crystal panel in the first direction. A plurality of LED modules () are arranged along the second direction perpendicular to the first direction. End lenses (A,B) and a middle lens () for enlarging a light divergence angle are disposed on the plurality of LED modules (). The direction in which the end lens (A,B) enlarges the light divergence angle differs from that in which the middle lens () enlarges the divergence angle. This structure can reduce difference in brightness of the liquid crystal panel, while reducing the number of light sources.