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:
May. 29, 2012
Filed:
Jun. 13, 2006
Seiji Ohhashi, Tenri, JP;
Takahiro Senda, Tenri, JP;
Seiji Ohhashi, Tenri, JP;
Takahiro Senda, Tenri, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In one embodiment of the present invention, a driving TFT, a switching TFT, and an organic EL element are provided in series on a first path which connects a power source line and a common cathode. The switching TFT is provided on a second path which connects a node between the driving TFT and the switching TFT and a source wiring line. Further, the switching TFT is turned ON so as to cause the second path to be conductive and the switching TFT is turned OFF so that a branch extending from the node on the first path toward the organic EL element is caused to be non-conductive. As a result, it is possible to realize a display device and a driving method thereof whereby the contrast can be made higher than a conventional pixel circuit and deterioration of an electro-optical element can be suppressed.