Circuit apparatus and display system having different attenuation factor distributions of backlight source luminance

Abstract

A circuit apparatus includes a storage unit and a light source luminance determination circuit. The storage unit stores a plurality of pieces of attenuation factor distribution information indicating an attenuation factor distribution of light with respect to a distance between a light source element and a pixel. The light source luminance determination circuit determines, by light adjustment processing based on input image data and the plurality of pieces of attenuation factor distribution information, light source luminance information indicating luminance of light emitted by each light source element of a plurality of light source elements. In a first mode, the light source luminance determination circuit determines the light source luminance information based on the input image data and first attenuation factor distribution information among the plurality of pieces of attenuation factor distribution information. In a second mode, the light source luminance determination circuit determines the light source luminance information based on the input image data and second attenuation factor distribution information in which the attenuation factor distribution is different from that in the first attenuation factor distribution information among the plurality of pieces of attenuation factor distribution information.