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:
Nov. 04, 2014
Filed:
Sep. 23, 2011
Applicants:
Hsuan-ming Tsai, Hsin-Chu, TW;
Chun-yen Liu, Hsin-Chu, TW;
Inventors:
Hsuan-Ming Tsai, Hsin-Chu, TW;
Chun-Yen Liu, Hsin-Chu, TW;
Assignee:
AU Optronics Corp., Science-Based Industrial Park, Hsin-Chu, TW;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 5/00 (2006.01); G09G 3/32 (2006.01);
U.S. Cl.
CPC ...
G09G 3/3233 (2013.01); G09G 2300/043 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0814 (2013.01); G09G 2320/045 (2013.01);
Abstract
A pixel driving circuit of an organic light emitting diode (OLED) includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a capacitor, and an OLED. The operation of the pixel driving circuit includes three stages including discharging, data writing, and emitting. The pixel driving circuit compensates the threshold voltage of the transistor in the stage of data writing, so the driving current of the OLED can be irrelevant to the variations of threshold voltages.