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, 1991
Filed:
Feb. 14, 1989
Applicant:
Inventors:
Jean-Frederic Clerc, Machida, JP;
Denis Sarrasin, Rives, FR;
Assignee:
Commissariat a l'Energie Atomique, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340805 ; 340811 ;
Abstract
Method for controlling a matrix display screen enabling its contrast to be adjusted as regards a liquid crystals screen and its luminosity as regards a fluorescent micropoints screen, said method consisting of periodically applying line conductors addressing signals V1 having for a certain period a value Vmax into an absolute value to be applied to column conductors of control signals. Addressing signals are applied to the line conductors, the durations of said signals having a value Vmax and are partially recovered for two consecutive lines.