Abstract: A color printing system includes a central processing unit for generating color image data, a color monitor for displaying color image data generated by the central processing unit and a color temperature sensing device for sensing color temperature of viewing light in which color images displayed on the monitor and color images printed by the printer are viewed. A first light source has a light output intensity controllable by the central processing unit. The central processing unit is adapted to control the intensity of the first light source in accordance with the color temperature sensed by the sensing device so as to match the color temperature sensed by the sensing device to a potential color temperature. Additionally, a second light source may be provided. The second light source has a different color temperature than the first light source and the central processor can adjust the intensity of the first and second light source based on relative color temperatures. The central processing unit is adapted to adjust the color temperature of either or both intensity of the first and second light sources.

US.Class: 358504 358527 348602 348655

IPC: H04N00146 H04N00558 H04N00973

US Patents Cited: 3315029 4574319 4742387 4764670 4773761 4876166 4894683 4922089 4947207 4959755 4978892 4979803 5008739 5021875 5037201 5048955 5053299 5087937 5099313 5109248 5137364 5241374