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. 10, 2004
Filed:
Feb. 22, 2002
Naoaki Komiya, Kobe, JP;
Sanyo Electric Co., Ltd., , JP;
Abstract
A current control circuit is provided between a power source circuit and a power source line VL which supplies a drive current to an organic EL element provided in each emissive pixel of a display panel. An amount of current flowing from the power source circuit to the power source line VL is detected, and when the amount of current increases, a power source voltage Vdd to be applied to the power source line VL is decreased, thereby decreasing a current flowing thorough the organic EL element. Alternatively, contrast or brightness level of display data to be supplied to each EL element is controlled in accordance with the detected amount of current, so that when the current amount increases, the contrast or brightness level is reduced thereby restricting a current flowing through the organic EL element. Thus, the amount of current flowing through the organic EL element can be restricted to thereby prevent excessive power consumption of the display device.