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. 25, 2014
Filed:
Aug. 27, 2009
Katsumi Abe, Kawasaki, JP;
Kenji Takahashi, Yokohama, JP;
Ryo Hayashi, Yokohama, JP;
Hideya Kumomi, Tokyo, JP;
Katsumi Abe, Kawasaki, JP;
Kenji Takahashi, Yokohama, JP;
Ryo Hayashi, Yokohama, JP;
Hideya Kumomi, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A pixel circuit including at least a light emitting element, and a thin film transistor that supplies to the light emitting element a first current controlling a gray scale according to luminance-current characteristics of the light emitting element, wherein the thin film transistor has a back gate electrode, at least a driving period in which the thin film transistor supplies the first current to the light emitting element, and a writing period in which a second current is written to the thin film transistor before the driving period in order to pass the first current to the thin film transistor during the driving period are included, and by changing voltages which are applied to the back gate electrode in the driving period and the writing period, current capability to a gate voltage of the thin film transistor is made to differ.