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:
Oct. 18, 2011
Filed:
May. 25, 2007
Danika Chaussy, Brie et Angonnes, FR;
Céline Mas, Poisat, FR;
Danika Chaussy, Brie et Angonnes, FR;
Céline Mas, Poisat, FR;
STMicroelectronics S.A., Montrouge, FR;
Abstract
Circuitry for controlling a display matrix formed of light-emitting diodes arranged in rows and columns, diodes in each row being connected to common row lines, and diodes in each column being connected to common column lines, each of the column lines being selectively connected to a current source for providing a current to each of the column lines when the column line is selected, a column voltage being present at a column node of each column line while the column line is selected, each of the row lines being selectively connected to a rowoff voltage for turning off the diodes in that row, the circuitry including circuitry for generating the rowoff voltage including: capture circuitry arranged to capture a maximum value of the column voltages present at the column nodes of a plurality of selected column lines; storage circuitry arranged to store the maximum column voltage; and output circuitry arranged to provide the rowoff voltage based on the maximum column voltage.