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. 13, 2010
Filed:
Aug. 13, 2004
Céline Mas, Poisat, FR;
Eric Benoit, Quaix en Chartreuse, FR;
Olivier Scouarnec, Saint Ismier, FR;
Olivier Le Briz, Saint-Gervais, FR;
Danika Chaussy, Brie et Angonnes, FR;
Philippe Maige, Seyssinet-Pariset, FR;
Céline Mas, Poisat, FR;
Eric Benoit, Quaix en Chartreuse, FR;
Olivier Scouarnec, Saint Ismier, FR;
Olivier Le Briz, Saint-Gervais, FR;
Danika Chaussy, Brie et Angonnes, FR;
Philippe Maige, Seyssinet-Pariset, FR;
STMicroelectronics S.A., Montrouge, FR;
Abstract
A method for regulating the biasing voltage of column control circuits of an array screen formed of LEDs distributed in lines and columns, the column control circuits being adapted to turning on at least one LED of a line. The method includes increasing the biasing voltage when the current flowing through at least one activated LED is smaller than a determined luminance current and of decreasing the biasing voltage when the current flowing through each activated LED is equal to the determined luminance current.