In order to realize ZEB, thorough energy saving of lighting is necessary. For that purpose, daylight use is being promoted. In the office daylight is taken from the window surface where the blind is installed. When the luminance contrast between the wall surface of the room and the window surface is large, the sense of brightness in the room may decrease. So far, since the illumination is controlled so that the illuminance is constant, it was impossible to control based on perception based on luminance contrast. The authors developed a system that can cooperatively control lighting and blind using the perception obtained from the luminance image. In this paper, we report on the effectiveness of the system based on the actual driving experience under actual use.
