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. 02, 2006
Filed:
Mar. 15, 2004
Masaki Murakata, Yonezawa, JP;
Toshinao Yuki, Yonezawa, JP;
Kunizo Ogoshi, Yonezawa, JP;
Tohoku Pioneer Corporation, Yamagata, JP;
Abstract
A drive device for a light-emitting display panel, having the more extended light-emitting life of an EL element, is provided. Drive switches SXto SXn select a reverse direction voltage −V immediately after starting of scanning to supply the voltage −V to all of EL elements in a scanning state. Subsequently, through the switches SXto SXn, constant current sources Ito In are connected to data lines to be controlled for light emitting, and, a forward voltage +V(a voltage equal to or smaller than a light-emitting threshold one) is applied to data lines which do not contribute to light emitting. Thereby, the forward voltage is applied to the EL elements in a scanning state.