Patent ID: 8035738

Claim:
An apparatus for controlling black stretch, comprising: a black stretching unit configured to perform black stretch processing on a video signal in response to a slope of black stretch to generate a black stretched video signal, the slope of black stretch corresponding to a region between a minimum value and a maximum value of a black stretch control range, wherein the video signal is less than or equal to the maximum value of the black stretch control range being black-stretched; an offset adjusting unit configured to adjust an offset of the black-stretched video signal to generate an offset-adjusted video signal; and an output unit configured to output an output video signal corresponding to the offset-adjusted video signal when the offset-adjusted video signal has a positive value in a region that is less than or equal to the minimum value, and configured to output the output video signal corresponding to 0 when the offset-adjusted video signal has a negative value in the region that is less than or equal to the minimum value.