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:
Mar. 12, 2002
Filed:
Mar. 02, 2000
Applicant:
Inventors:
Pierre Legagneux, Voisins le Bretonneux, FR;
Didier Pribat, Sevres, FR;
Assignee:
Thomson-CSF, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
G09G 3/22 ;
U.S. Cl.
CPC ...
G09G 3/22 ;
Abstract
A drive system which makes it possible to drive a matrix of picture elements, each including a cathode made of a material with low electron affinity. Each of crossover-point circuits include a switching device associated with a cathode of a picture element and makes it possible, with the aid of memory circuits, to connect the cathode to a current source during a time necessary for the driving of all the rows of the matrix and to regulate the current conduction of the corresponding picture element. Such a drive system may find particular application to electron guns and display screens.