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:
Jan. 01, 1991
Filed:
Sep. 05, 1989
Applicant:
Inventor:
Toshio Nishimura, Jyoyo, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
350332 ; 350336 ; 340765 ;
Abstract
A liquid crystal display driver has a 1/4-duty binary-voltage driving system. This driving system generates at least four separate common signals and at least eleven separate segment signals. Although the duty cycle is 1/4. V.sub.on /V.sub.off ratio of the effective value is greater than 1.7. This is accomplished by using four common electrodes and seven segment electrode per each individual pattern generator.