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. 09, 2000
Filed:
Mar. 17, 1998
Takayoshi Yoshida, Yonezawa, JP;
Pioneer Electronic Corporation, Tokyo-to, JP;
Tohoku Pioneer Electronic Corporation, Yamagata, JP;
Abstract
An apparatus for driving an electroluminescence device by supplying an alternating current to the electroluminescence device, the apparatus having: a direct voltage source; a constant voltage control device for generating a direct current having a constant voltage on the basis of an output of the direct voltage source; a constant current control device for generating a direct current having a constant current on the basis of the output of the direct voltage source; a selecting device for selecting either one of the direct current having the constant voltage and the direct current having the constant current; and a converting device for converting the selected direct current to the alternating current to be supplied to the electroluminescence device.