Investigation of the Impact of Surrounding Light on Monitor’ Color Showing

Under surrounding light, the color showing on monitor's surface is produced by its emitting light and the reflected part of surrounding light by the surface. Utilizing the color characterizing relation of monitor, the actual color showing performances of two monitors in color gamuts and tone curves under different conditions of surrounding light were investigated. The experiment results showed that the luminance values of some dark colors and black point could increase with the illuminance increase of surrounding light, resulting in the compress in gamut within the color space area. And the same phenomena appeared in every color tone curves. But the change in lightness value of the white point was much smaller relatively. And the results revealed simultaneously that the compress extent could not only correlate directly with the illuminance of surrounding light, but also with the relative increase in black point lightness, further, with the intrinsic emitting light and reflecting capability of the screen surface.