Patent ID: 8508610

Claim:
A video signal processing apparatus comprising: a first storage unit configured to store first image data; a second storage unit configured to store second image data; a comparing unit configured to compare luminance-signal component data in the first image data with a predetermined level; a modifying unit configured to modify the second image data based on the output from the comparing unit; and a synthesizing unit configured to synthesize the first image data and the second image data modified by the modifying unit and output the synthesized data, wherein the modifying unit blinks the second image data in a blink cycle, in which relative relations of a frame rate of the video signal and the blink cycle are variable, and wherein the modifying unit is configured to generate different patterns for at least two areas of a high-intensity area, a low-intensity area, and a normal-intensity area of the first image data, and superimpose the patterns on the first image data.