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:
Nov. 02, 2004
Filed:
Apr. 02, 2003
Hitoshi Yasuda, Gifu, JP;
Hidenori Chiba, Gifu, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
An organic electroluminescent display device includes a plurality of electroluminescent elements and a plurality of thin film transistors. Each of the electroluminescent elements includes an anode, a cathode and a light emitting layer disposed between the anode and the cathode. Each of the thin film transistors drives one of the electroluminescent elements. A first power supply is connected to the thin film transistors and supplies a power supply voltage to the thin film transistors. The first power supply changes the power supply voltage so that luminance of the light emitting layers vary. A second power supply is connected to the electroluminescent elements and supplies a reference voltage to the electroluminescent elements. Because the power supply voltage itself varies, it is easy to adjust the brightness of the display device.