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:
Apr. 27, 2010
Filed:
Jun. 29, 2007
Yoshihiro Imajo, Mobara, JP;
Yoshifumi Sekiguchi, Hitachiota, JP;
Hitoshi Taniguchi, Yokohama, JP;
Ikuo Hiyama, Hitachinaka, JP;
Yoshihiro Imajo, Mobara, JP;
Yoshifumi Sekiguchi, Hitachiota, JP;
Hitoshi Taniguchi, Yokohama, JP;
Ikuo Hiyama, Hitachinaka, JP;
Hitachi Displays, Ltd., Chiba-ken, JP;
IPS Alpha Technology, Ltd., Chiba-ken, JP;
Abstract
A liquid crystal display device having a direct backlight which uses a high-bright light source achieves both of a high efficiency and thin uniformity. In a liquid crystal display device which includes a liquid crystal panel, and a backlight unit which is arranged on a side of the liquid crystal panel opposite to a display screen of the liquid crystal panel, the backlight unit includes a housing, a plurality of light sources arranged in the inside of the housing, and a diffusion plate which is arranged between the plurality of light sources and the liquid crystal panel, the diffusion plate includes a plurality of light blocking regions at positions corresponding to the plurality of respective light sources, and the light blocking region at a center portion of the housing and the light blocking region at an edge portion of the housing exhibits transmissivities different from each other.