Patent ID: 7333081
Filing Date: 2008-02-19
Classification: G09G,H04N

Abstract:
1. A display unit driver for an image display apparatus for displaying an image on a display unit in accordance with a video signal, said driver display unit comprising: a first controller for feed backing information of an average luminance level and a maximum luminance level obtained from said video signal and feedback-controlling a gain of a luminance signal included in said video signal and adjusting a video contrast; and a second controller for controlling an illuminance of backlight applied to a screen of said display unit in accordance with said average luminance level information feed backed and used for controlling the gain of said luminance signal in said first controller; wherein a cycle time of the control signal output from said second controller to control the illuminance of the backlight is longer than a cycle time of the control signal output from said first controller to control said luminance signal.