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:
Aug. 08, 2000
Filed:
May. 04, 1998
Applicant:
Inventors:
Ichiro Takayama, Kanagawa, JP;
Kazushi Sugiura, Kanagawa, JP;
Yukio Yamauchi, Kanagawa, JP;
Naoya Sakamoto, Kanagawa, JP;
Mitsufumi Codama, Ibaraki, JP;
Michio Arai, Tokyo, JP;
Assignees:
TDK Corporation, Tokyo, JP;
Semiconductor Energy Laboratory Co., Ltd., Kanagawa, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
345 76 ; 345 79 ; 345205 ; 345206 ;
Abstract
An image display device having a plurality of pixcels with uniform light intensity comprises an organic EL element (3), a bias FET (2) for emit current control of said EL element, a capacitor (4) coupled with a gate electrode of said bias FET (2) for holding a signal, and a select FET (1) for selectively writing a signal to said capacitor (4), wherein the value S of said bias FET (2) is larger than that of said select FET (1).