Patent ID: 8416257

Claim:
A video signal processing circuit that includes a white corrector configured to convert an input value of each of RGB video signals into an output value of the corresponding one of the RGB video signals, the video signal processing circuit being characterized in that: the white corrector is configured to convert the input value by using a first input-output characteristic in a region where the input value is equal to or smaller than a predetermined value (note that 0< the predetermined value <255), the first input-output characteristic being represented by a straight line passing through an origin and causing the output value to take a value smaller than a maximum value, and convert the input value by using a second input-output characteristic in a region where the input value is equal to or larger than the predetermined value, the second input-output characteristic causing the output value to take a value equal to an output value of the first input-output characteristic when the input value is equal to the predetermined value, and causing the output value to take a maximum value when the input value is at a maximum value; and in the conversion by the white corrector, the gradient of the straight line of the first input-output characteristic is 1 or larger for at least one of the colors of RGB, the gradient of the straight line of the first input-output characteristic is less than 1 for at least other one of the colors of RGB, and luminance of an output video image of the white corrector is coincident with luminance of the input video image of the white corrector, wherein the color that the gradient of the straight line of the first input-output characteristic is 1 or larger is one of the RGB, and, the color that the gradient of the straight line of the first input-output characteristic is less than 1 is another one of the RGB, and ratio among each color of RGB is maintained constant in the region where the input value is equal to or smaller than the predetermined value.