公开(公告)号：CA2117253A1

公开(公告)日：1994-10-06

申请号：CA2117253

申请日：1994-03-31

Applicant: CANON KK

Inventor： YAMAGUCHI EIJI ,  OSAKA YOSHIYUKI ,  SUZUKI HIDETOSHI ,  TAKEDA TOSHIHIKO ,  TOSHIMA HIROAKI ,  ISONO AOJI ,  SUZUKI NORITAKE ,  TODOKORO YASUYUKI

IPC: G09G3/20 ,  G09G3/22 ,  H01J1/316 ,  H01J31/12 ,  H04N9/30 ,  H01J29/98

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.