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. 05, 2002
Filed:
Oct. 19, 1999
Applicant:
Inventors:
Yukio Nagase, Shizuoka-ken, JP;
Noboru Koumura, Shizuoka-ken, JP;
Izumi Narita, Shizuoka-ken, JP;
Seiji Mashimo, Yokohama, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 3/524 ;
U.S. Cl.
CPC ...
H01L 3/524 ;
Abstract
An exposure device having an array of a plurality of light emitting elements composed of at least an anode layer, a cathode layer and one or more organic compound layers interposed between the anode layer and the cathode layer all of which are formed on a substrate. In the exposure device, the quantity of light emitted from each light emitting element is made uniform by controlling the light emitting area of each light emitting element. Therefore, the exposure device eliminates differences in the quantity of emitted light among the plurality of light emitting elements without using a special drive circuit.