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. 19, 2008
Filed:
Jul. 22, 2005
Makoto Shibusawa, Fukaya, JP;
Yoshiro Aoki, Kitamoto, JP;
Hirondo Nakatogawa, Kumagaya, JP;
Toshiba Matsushita Display Technology Co., Ltd., Tokyo, JP;
Abstract
In an active matrix organic EL display including a drive control element which has a first terminal connected to a first power supply terminal, a control terminal, and a second terminal which outputs a driving current having a magnitude corresponding to the voltage between the first terminal and the control terminal, a capacitor which has one electrode connected to the control terminal and can maintain the voltage between the first terminal and the control terminal constant, and an organic EL element connected between the second terminal and a second power supply terminal, a plurality of switches connected in series are used as switches between the second terminal and the control terminal to obtain a perfect nonconductive state, and the switch on the control terminal side is set in the nonconductive state earlier than the remaining switch, thereby decreasing the potential shift amount generated by the capacitance of the switches themselves.