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:
Dec. 04, 2012
Filed:
Dec. 18, 2006
Takahiro Senda, Nara, JP;
Takahiro Senda, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In a pixel circuit, a driving TFT, a switching TFT, and an organic EL elementare provided between a power supply wiring line Vp and a common cathode Vcom and a capacitorand a switching TFTare provided between a gate terminal of the driving TFTand a data line Sj. A switching TFTis provided between a connection point B between the capacitorand the switching TFTand the power supply wiring line Vp, a switching TFTis provided between the gate and drain terminals of the driving TFT, and a switching TFTis provided between the gate terminal of the driving TFTand a reference supply wiring line Vs. A potential that brings the driving TFTinto a conduction state is applied to the reference supply wiring line Vs. Thus, variations in the threshold voltage of a drive element can be properly compensated for and unwanted light emission from an electro-optical element can be prevented.