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:
Apr. 14, 2009
Filed:
Jul. 20, 2004
Applicants:
Hajime Akimoto, Kokubunji, JP;
Kiyoshige Kinugawa, Mutsusawa, JP;
Nobuaki Hayashi, Kunitachi, JP;
Inventors:
Assignee:
Hitachi Displays, Ltd., Chiba, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 3/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
An image display device which has a stable luminous brightness among pixels. An on/off control switchfor stopping the driving operation of a light emitting elementis provided in a pixel. A change in the luminous brightness caused by a variation in the characteristic of the light emitting elementis suppressed by feeding a result measured by a current measuring circuit provided in one end of a power lineback to a drive signal for the light emitting element