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:
Feb. 22, 2005
Filed:
Sep. 20, 2001
Applicant:
Webster E. Howard, Lagrangeville, NY (US);
Inventor:
Webster E. Howard, Lagrangeville, NY (US);
Assignee:
eMagin Corporation, Hopewell Junction, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G003/10 ; G09G005/00 ;
U.S. Cl.
CPC ...
Abstract
An active matrix OLED display includes current driving TFT transistors to provide current to corresponding OLEDs. The control signals to each TFT gate include a data signal that is proportional to the desired luminance output for the OLED and a reverse data signal that is used to reverse bias the TFT to prevent threshold drift in the TFT. The data signal alteration is preformed either at a frame rate or at a line rate.