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:
Feb. 14, 2012
Filed:
Jan. 08, 2010
Satoshi Ouchi, Kamakura, JP;
Koichi Sakita, Chigasaki, JP;
Hajime Inoue, Yokohama, JP;
Yoshiharu Yamashita, Yokohama, JP;
Satoshi Ouchi, Kamakura, JP;
Koichi Sakita, Chigasaki, JP;
Hajime Inoue, Yokohama, JP;
Yoshiharu Yamashita, Yokohama, JP;
Hitachi Consumer Electronics Co., Ltd., Tokyo, JP;
Abstract
A backlight unit, being thin-sized, but having high definition and high uniformity of luminance, and a video display apparatus applying the same therein, has a plural number of sets of at least one or more of light source(s) () and a light guidance plate () for guiding lights from the light source(s) to a side of a liquid crystal panel, to be emitted therefrom, wherein the light source(s) is/are disposed on one end side of the light guidance plate, and other set of light source is disposed on a rear surface side of the other end of the light guidance plate opposite to the one end. A gap or groove () is formed mutually between each of the light guidance plates in the plural number of sets, and if assuming that width of the gap or groove is 'd', distance between a light incident surface of the liquid crystal panel and a light emission surface of the light guidance plate, or distance between a light incident surface of an optical member disposed between the liquid crystal panel and the light guidance plate and a light emission surface of the light guidance plate is 'h', and further 2.0 mm>d≧0.1 mm and 10.0 mm>h≧0.4 mm, then the following condition is satisfied:4≦≦100.