METHOD FOR COMPENSATING NONUNIFORMITY OF DISPLAY BY CHANGE IN PRIMARY COLOR OF COLOR MONITOR

摘要

PROBLEM TO BE SOLVED: To provide a method for compensating the nonuniformity of display by a change in primary colors of a color monitor by using a virtual primary color method. SOLUTION: The chromaticity coordinates and maximum luminance of the primary colors of respective pixels in the monitor are measured and one set of virtual primary colors are selected from the measured values of all the primary colors. The tristimulus values of the respective virtual primary colors are generated from the respective pixels in the monitor. The characteristics of the virtual primary colors are displayed by the chromaticity coordinates and the maximum luminance and may be substituted for the virtual primary colors selected of the primary colors and therefore all the pixels have the same virtual primary colors and the color display of the monitor is made uniform. When the differences between the primary colors and the tristimulus values of the virtual primary colors are small, the relations between input video signals and light source modulation signals are searched in order to make the tristimulus values of the primary colors in the pixels and the tristimulus values of the virtual primary colors identical or analogous. The tristimulus values of the primary colors and the tristimulus values of the virtual primary colors are so set as to coincide or resemble. Further, conversion coefficients are calculated and the input video signals are changed to the light source modulation signals and the drive signals of the primary colors in the monitor are generated by the light source modulation signals.