Patent ID: 6778182
Filing Date: 2004-08-17
Classification: G09G,H04N

Abstract:
A display device comprising:a measuring means for measuring an average luminance level of a video signal; a gamma correction means for correcting an output signal level of the video signal corresponding to an input signal level of the video signal responsive to a gamma correction curve, the gamma correction means changing the gamma correction curve responsive to the average luminance level by changing the gamma correction curve to being approximately linear when the average luminance level is a maximum value, and the gamma correction means changing the gamma correction curve to being curvilinear, with an intermediate portion of the gamma correction curve having a greater value than when the gamma correction curve is approximately linear, when the average luminance level is less than the maximum value; and a display means for displaying an image according to said output signal level of the video signal corrected by the gamma correction means.