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. 02, 2005
Filed:
Oct. 30, 1998
Takahiro Fujioka, Mobara, JP;
Kazunari Kurokawa, Mobara, JP;
Hiroshi Katayanagi, Chiba, JP;
Mitsuru Goto, Chiba, JP;
Yukihide Ode, Mobara, JP;
Akira Ogura, Nagara-machi, JP;
Kentaro Agata, Mobara, JP;
Takahiro Fujioka, Mobara, JP;
Kazunari Kurokawa, Mobara, JP;
Hiroshi Katayanagi, Chiba, JP;
Mitsuru Goto, Chiba, JP;
Yukihide Ode, Mobara, JP;
Akira Ogura, Nagara-machi, JP;
Kentaro Agata, Mobara, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Device Engineering Co., Ltd., Mobara, JP;
Abstract
A liquid crystal display device has a semiconductor integrated circuit capable of outputting a voltage equal to or higher than the source-drain withstand voltage of a component transistor. A switching circuit has first conducting-type first and second transistors connected in series between a first input terminal and a common output terminal and second conducting-type third and fourth transistors connected between a second input terminal and the common output terminal and a switching control circuit for controlling the switching circuit. The switching control circuit applies first and second bias voltages for turning on the second and fourth transistors to the gate electrodes of the second and fourth transistors, and applies a control voltage for selectively turning on/off the first or third transistor to the gate electrodes of the first and third transistors.