Luminance level control device

Abstract

A scene change detecting circuit () detects a scene change of video. An average luminance level operating circuit () calculates an average luminance level (APL) of a video signal (VD). A luminance overdrive amount calculating circuit () calculates a luminance overdrive amount (OD) based on the average luminance level (APL). A time-linked attenuating circuit () outputs a power consumption limit correction amount (PA) by attenuating the luminance overdrive amount (OD) with an elapse of time from a point in time of detecting the scene change. An adder () adds the power consumption limit correction amount (PA) and a reference power consumption limit value (Lp) to output the addition result as a power consumption limit amount (PL). An ABL circuit () calculates a luminance limit amount (BL) based on luminance limit characteristics, the average luminance level (APL) and the power consumption limit amount (PL). A luminance level control circuit () determines a display drive condition (BC) based on the luminance limit amount (BL). A PDP drive controller () drives a display panel () based on the video signal (VD) and the display driving condition (BC).