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. 05, 1997
Filed:
Apr. 04, 1994
Eiji Yamaguchi, Zama, JP;
Yoshiyuki Osada, Atsugi, JP;
Hidetoshi Suzuki, Fujisawa, JP;
Toshihiko Takeda, Atsugi, JP;
Hiroaki Toshima, Tokyo, JP;
Aoji Isono, Atsugi, JP;
Noritake Suzuki, Atsugi, JP;
Yasuyuki Todokoro, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A color display device has an evacuated vessel accommodating at least an electron-beam generating source in which a plurality of surface-conduction electron emitting devices are arrayed on a substrate, and phosphors for the three primary colors red, green and blue for emitting light in response to being irradiated with electron beams from the electron-beam generating source. A modulator is provided to modulate the electron beams, which irradiate the phosphors, based upon an image signal, the modulator having .gamma.-corrector for subjecting the image signal to a gamma correction. The modulator modulates the electron beams based upon the image signal corrected in advance by the .gamma.-corrector.