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:
Oct. 11, 2011
Filed:
Mar. 06, 2006
Akinori Hayafuji, Yonezawa, JP;
Akinori Hayafuji, Yonezawa, JP;
Tohoku Pioneer Corporation, Tendo-shi, Yamagata, JP;
Abstract
Drive voltages corresponding to forward voltages for colors R, G, and B are supplied to display pixels for colors R, G, and B arranged on a display panel to correct disruption of a color balance due to aging and temperature dependence of EL elements. The maximum voltage among the drive voltages is detected, and a predetermined voltage is added to the maximum voltage by a charge pump or the like, so that an operation voltage of a level shifter in a gate driver is obtained. An operation signal having a level equal to that of the operation voltage is supplied to a gate of a transistor arranged in each pixel. Therefore, regardless of aging or the like, the control transistor accurately executes an ON operation at a timing for scanning to make it possible to prevent an image display from being defective.