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. 26, 2005
Filed:
Mar. 07, 2002
Yasushi Hara, Kawasaki, JP;
Keiichi Murakami, Kawasaki, JP;
Hiroshi Yamada, Kawasaki, JP;
Hideyuki Motoyama, Kawasaki, JP;
Hirokazu Aritake, Kawasaki, JP;
Toshiaki Yoshihara, Kawasaki, JP;
Shinji Tadaki, Kawasaki, JP;
Yasushi Hara, Kawasaki, JP;
Keiichi Murakami, Kawasaki, JP;
Hiroshi Yamada, Kawasaki, JP;
Hideyuki Motoyama, Kawasaki, JP;
Hirokazu Aritake, Kawasaki, JP;
Toshiaki Yoshihara, Kawasaki, JP;
Shinji Tadaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A backlight device for a transmissive liquid crystal display device includes a plurality of light sources, including a cold cathode fluorescent lamp and an LED, a liquid crystal panel, and a light guide plate. The light guide plate causes light entering into it through one surface thereof to emerge out of another surface thereof toward the liquid crystal panel. A controller for the backlight device selects at least one of the cold cathode fluorescent lamp and LED, depending on brightness required for the liquid crystal display device and determines, in accordance with the required brightness, the brightness of the selected light source to operate the light source accordingly.