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:
Feb. 26, 2008
Filed:
Mar. 06, 2006
Applicants:
Atsushi Shiraishi, Sayama, JP;
Masafumi Ide, Tokorozawa, JP;
Inventors:
Atsushi Shiraishi, Sayama, JP;
Masafumi Ide, Tokorozawa, JP;
Assignee:
Citizen Holdings Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G 3/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
For statically driving a liquid-crystal optical-modulation device, an alternating electric field produced by a drive signal is applied to a liquid crystal included therein. In a first period in which the alternating electric field has a first polarity, the drive signal is pulse-width modulated based on a first ON-voltage and a first OFF-voltage. In a second period in which the alternating electric field has a second polarity, the drive signal is pulse-width modulated based on a second ON-voltage and a second OFF-voltage.