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. 03, 1978
Filed:
May. 18, 1976
Applicant:
Inventors:
Bruno Dargent, Grenoble, FR;
Jacques Robert, Saint Egreve, FR;
Assignee:
Commissariat a l'Energie Atomique, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ; G08B / ;
U.S. Cl.
CPC ...
3501 / ; 3403 / ;
Abstract
A display cell comprises a liquid-crystal film interposed between two groups of electrodes to which is applied a set of low-frequency voltages in order to produce an optical state '0' at desired points and a set of high-frequency voltages in order to produce an optical state '1' at other predetermined points. In the composite excitation applied to each zone, the low-frequency fraction of excitation exceeds the high-frequency fraction in the '0' display zones and the high-frequency fraction exceeds the low-frequency fraction in the '1' display zones.