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. 24, 2012
Filed:
Oct. 29, 2008
Applicant:
Felipe A. Leon, Rochester, NY (US);
Inventor:
Felipe A. Leon, Rochester, NY (US);
Assignee:
Global OLED Technology LLC, Herndon, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 3/30 (2006.01); G09G 3/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electroluminescent (EL) subpixel having a readout transistor is driven by a current source when the drive transistor is non-conducting. This produces an emitter-voltage signal from which an aging signal representing the efficiency of the EL emitter can be computed. The aging signal is used to adjust an input signal to produce a compensated drive signal to compensate for changes in efficiency of the EL emitter.