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:
May. 26, 1992
Filed:
Feb. 13, 1989
Applicant:
Inventors:
Masao Kawamura, Fuchu, JP;
Ken Yoshino, Koganei, JP;
Assignee:
Casio Computer, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ; G02F / ;
U.S. Cl.
CPC ...
340703 ; 340702 ; 340784 ; 340765 ; 359 55 ; 359 68 ;
Abstract
In driving a color liquid crystal panel having red, green and blue color filters, a color liquid crystal display apparatus sets signal electrodes of these three colors in a no-bias status during a non-display period of an image signal in such a manner as to permit at least two colors of the signal electrodes have mutually different effective voltages. The effective voltages in the no-bias state are set at values which provide the optimum value for .DELTA.n.multidot.d (.DELTA.n: birefringence) in accordance with cell gaps d on the signal electrodes, thereby minimizing the height difference between the color filters.