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. 30, 2011
Filed:
May. 30, 2008
Seiji Murata, Yokohama, JP;
Yasutaka Tsuru, Kawasaki, JP;
Satoshi Ouchi, Kamakura, JP;
Mayumi Nagayoshi, Chofu, JP;
Seiji Murata, Yokohama, JP;
Yasutaka Tsuru, Kawasaki, JP;
Satoshi Ouchi, Kamakura, JP;
Mayumi Nagayoshi, Chofu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A direct type backlight unit used in a liquid crystal display device is provided which can suppress lowering of luminance at an electrode portion of a linear light source. A reflecting plate is formed on a side wall of a box-shaped reflector close to an end of a linear light source. The reflector reflects light beams from the linear light source to be guided toward a liquid crystal panel. The reflecting plate on the side wall has at least two inclined surfaces. The inclined surfaces may have a stepped shape or a convex ridge shape. According to this arrangement, it is possible to reduce or eliminate decrease of the luminance level at ends of an effective display area of a liquid crystal panel.