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:
Aug. 19, 2008
Filed:
Jul. 06, 2004
Ho-kyoon Chung, Yongin-si, KR;
Yang-wan Kim, Seoul, KR;
Choon-yul OH, Gunpo-si, KR;
Oh-kyong Kwon, Seoul, KR;
Sang-moo Choi, Suwon-si, KR;
Ho-Kyoon Chung, Yongin-si, KR;
Yang-Wan Kim, Seoul, KR;
Choon-Yul Oh, Gunpo-si, KR;
Oh-Kyong Kwon, Seoul, KR;
Sang-Moo Choi, Suwon-si, KR;
Samsung SDI Co., Ltd., Suwon-si, KR;
Abstract
A pixel circuit in an organic light emitting device capable of realizing high gradation representation by self-compensating a threshold voltage, and a method for driving the same. The pixel circuit includes an electroluminescent element for emitting light in response to an applied driving current. A first transistor delivers a data signal voltage in response to a current scan line signal. A second transistor generates a driving current to drive the electroluminescent element in response to the data signal voltage. A third transistor connects the second transistor in the form of a diode in response to a current scan signal to self-compensate the threshold voltage of the second transistor. A capacitor stores the data signal voltage delivered to the second transistor. A fourth transistor delivers a power supply voltage to the second transistor in response to a current light-emitting signal. A fifth transistor provides the driving current, provided from the second transistor, for the electroluminescent element in response to the current light-emitting signal.