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. 09, 2007
Filed:
Jul. 12, 2001
Pierre Nicolas, St Egreve, FR;
Denis Sarrasin, Sassenage, FR;
Pierre Nicolas, St Egreve, FR;
Denis Sarrasin, Sassenage, FR;
Commissariat a l'Energie Atomique, Paris, FR;
Abstract
Process and device for control of an electron source with matrix structure, regulated by the emitted charge. The invention is applicable to an electron source comprising addressing rows and columns which intersect to define emission areas, the electrons being supplied by the columns. According to this invention, the emission of electrons is triggered by increasing the potential of the columns to a value that will enable preferential emission of unaddressed rows. Then, throughout the emission duration, the potential of columns will be kept equal to this value, while simultaneously making measurements in the columns of the quantity of charges emitted by the pixels in the said columns. Secondly, when the quantity of charges measured on a column reaches a required charge quantity, the potential of this column is switched to a value that will block the emission of electrons. The invention is particularly applicable to flat field emission displays.