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:
Jul. 16, 1985
Filed:
Sep. 22, 1982
Applicant:
Inventors:
Assignee:
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; G09F / ;
U.S. Cl.
CPC ...
307270 ; 3072 / ; 307571 ; 340778 ; 340805 ; 340811 ;
Abstract
A liquid crystal driver circuit has first to fourth resistors serially connected between a positive power source terminal and a reference power source terminal, first and second MOS transistors respectively connected in parallel with the first and fourth resistors, a common electrode driver circuit for generating common electrode bias signals in accordance with common electrode selection signals, and a segment electrode driver circuit for generating segment electrode bias signals in accordance with segment data. A third switching MOS transistor is coupled between the reference power source terminal and the series circuit of the first to fourth resistors.