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:
Oct. 24, 2000
Filed:
May. 26, 1999
Mitsuo Uenuma, Mobara, JP;
Futaba Denshi Kogyo K.K., Mobara, JP;
Abstract
A display device capable of realizing stepless gradation expression depending on a video signal inputted, to thereby highly improve quality of an image displayed. An FET element is arranged for each of cathode electrodes to permit a drain current obtained depending on a voltage of a video signal applied to a gate of each FET element to be fed to each cathode electrode. Also, a video signal correction circuit is arranged for providing the video signal applied to each FET element with characteristics reverse to gate/source voltage-drain current characteristics of the FET element. Such construction permits a cathode current to be controlled in a stepless manner depending on a level of the video signal, to thereby realize stepless gradation expression depending on the video signal, resulting in quality of an image displayed being extensively increased.