Image signal converting apparatus and image display apparatus

摘要

The controlling unit (130) generates an image output signal based on an image input signal. The fourth color component light is substitutable by substitution component light composed of any two of the red component light, the green component light, and the blue component light. The controlling unit (130), according to a light amount of the fourth color component light, subtraction processing on a subtraction target signal that is input signal constituting a part of the image input signal and corresponding to the substitution component light, and the controlling unit (130) generates an output signal constituting a part of the image output signal and corresponding to the substitution component light.