Futaba Denshi Kogyo K.k.

Mitsuo Uenuma

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.

Growing community of inventors

Mobara, Japan

Mitsuo Uenuma