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:
Jun. 08, 2004
Filed:
Nov. 16, 2000
Applicant:
Inventor:
Shingo Kawashima, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 3/30 ;
U.S. Cl.
CPC ...
G09G 3/30 ;
Abstract
In drive circuit for organic EL elements performing multicolor light emission, DC power supply circuits and are provided for each emitted color of light, so as to supply a voltage that differs, depending upon the color of light emitted, thereby reducing the amount of power loss that occurred in the current drive circuit and because of the differences in the voltage versus intensity characteristics of each emitted color EL elements.