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:
Oct. 18, 2005
Filed:
May. 17, 2001
Toshihiro Yajima, Mobara, JP;
Seiichi Nishiyama, Mobara, JP;
Shigetake Takaku, Mobara, JP;
Yoshiharu Takeda, Mobara, JP;
Shigeo Mikoshiba, Tokyo, JP;
Tomokazu Shiga, Kawasaki, JP;
Koji Hashimoto, Kawasaki, JP;
Yusuke Baba, Fuchu, JP;
Toshihiro Yajima, Mobara, JP;
Seiichi Nishiyama, Mobara, JP;
Shigetake Takaku, Mobara, JP;
Yoshiharu Takeda, Mobara, JP;
Shigeo Mikoshiba, Tokyo, JP;
Tomokazu Shiga, Kawasaki, JP;
Koji Hashimoto, Kawasaki, JP;
Yusuke Baba, Fuchu, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Electronic Devices Co., Ltd., Chiba-ken, JP;
Abstract
A liquid crystal display device includes a liquid crystal display panel having a liquid crystal layer sandwiched between a pair of transparent substrates, at least one of which has patterned electrodes on an inner surface thereof, and a backlight disposed behind the liquid crystal display panel. The backlight has at least one discharge tube including a sealed-off transparent tube, a phosphor film formed on an inner surface of the sealed-off transparent tube, and a discharge gas within the sealed-off transparent tube and plural electrodes spaced in a direction of an axis of the sealed-off transparent tube and positioned at least partially around a circumference of the sealed-off transparent tube. At least two adjacent ones of the plural electrodes is supplied with alternating voltages different in frequency from each other, respectively.