Patent ID: 7808473

Claim:
A display apparatus comprising: a receiving unit which receives a video signal; a signal-processing unit which performs a specific process on the video signal received at the receiving unit; a luminance-curve converter which converts the input/output characteristic of the luminance level of an input video signal in the signal-processing unit; a display device which displays an image represented by the video signal that is an output of the luminance-curve converter; a histogram-extracting unit which generates histogram distribution data for a luminance level of a video signal that is to be input to the luminance-curve converter; characteristic-control-data output unit which sets a characteristic to the luminance-curve converter so that the luminance-curve converter emphasizes a low-luminance region when the histogram distribution data shows that the image represented by the input video signal comprises the low-luminance region; an integrator which integrates data items pertaining to the region emphasized by the luminance-curve converter, thereby generating an integrated value; and a multiplier which generates, from the integral value, an output that reduces a potential level of the amount of light of the display device.