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. 20, 2013
Filed:
Jun. 13, 2008
Yoshinao Kobayashi, Hiratsuka, JP;
Takatoshi Tsujimura, Fujisawa, JP;
Shinya Ono, Yokohama, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A display unit has an organic light emitting diode (OLED)provided in correspondence with each of pixels and capable of emitting light by itself, a drive transistorfor driving the OLED, a twig transistorwhich is formed so as to have a portion of an electrode of the drive transistorindependently formed, and which is used to detect a threshold voltage (Vth) of the drive transistor, a compensating capacitorin which the threshold voltage (Vth) detected by the twig transistoris written, a signal capacitorin which a signal voltage to be supplied to the drive transistoris written, a first transistorprovided between a data line and the signal capacitor, a second transistorprovided between the signal capacitorand the compensating capacitor, and a third transistorprovided between a gate electrode and another electrode of the twig transistor