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. 03, 2012
Filed:
Sep. 30, 2009
Charles I. Levey, West Henrietta, NY (US);
Felipe A. Leon, Rochester, NY (US);
Charles I. Levey, West Henrietta, NY (US);
Felipe A. Leon, Rochester, NY (US);
Global OLED Technology LLC, Herndon, VA (US);
Abstract
Inoperative or defective electroluminescent (EL) emitters in an EL display having a plurality of subpixels are detected. Current flow through a drive transistor in a subpixel is turned off, a selected test current is provided through the EL emitter in the subpixel using a current source, and the voltage at a second electrode of a readout transistor in the subpixel is measured to provide a status signal representative or characteristics of the selected EL emitter. The status signal for the subpixel is compared to the respective status signals of neighboring subpixels to determine whether the EL emitter in the subpixel is defective.