Patent ID: 8334876

Claim:
A signal processing device converting an image input signal into an image output signal and outputting the image output signal to a display device, the signal processing device comprising: a color coordinate adjuster configured to perform color coordinate adjustment processing for adjusting color coordinates of the image input signal according to a color reproduction range of the display device; a brightness adjuster configured to perform brightness adjustment processing for adjusting a brightness component of the image input signal; an output signal outputting unit configured to output the image output signal obtained by using results of the color coordinate adjustment processing and the brightness adjustment processing; and a controller configured to control a color coordinate adjustment coefficient and a brightness adjustment coefficient on the basis of values of a pixel having a first hue and values of a pixel having a second hue, the color coordinate adjustment coefficient used for the color coordinate adjustment processing, the brightness adjustment coefficient used for the brightness adjustment processing, wherein the controller controls the brightness adjustment coefficient so as to decrease the brightness component of the image input signal, when saturation of the pixel having the first hue is high, the controller controls the brightness adjustment coefficient so as to increase the brightness component of the image input signal, when saturation of the pixel having the second hue is high, and the controller decreases the brightness adjustment coefficient when increasing the color coordinate adjustment coefficient.