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:
Nov. 25, 2003
Filed:
Nov. 23, 1999
Applicant:
Inventor:
Naoaki Komiya, Ogaki, JP;
Assignee:
Sanyo Electric Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 1/900 ;
U.S. Cl.
CPC ...
G11C 1/900 ;
Abstract
The emitted luminance of an EL device is controlled in an analog manner so as to realize a multiple gray-scale display by employing a first TFT ( ) for switching, which turns on and off according to a selection signal SCAN and a second TFT ( ) for driving an EL device ( ) having an emissive layer between a pair of electrodes, by providing an analog switch ( ) for sampling an analog video signal (VIDEO) at a predetermined period and a capacitor ( ) for holding a sampling voltage from the analog switch ( ), and by applying the analog voltage held in the capacitor ( ) to the gate of the second TFT.