dispositivo de controle de luminância, aparelho de exibição usando o mesmo, método de controle de luminância e programa de controle de luminância.

摘要

Power consumption is cut down by reducing backlight light source luminance in accordance with the variability of luminance of the picture displayed on a display panel. A picture luminance detector calculates information (luminance information) representing luminance of the picture at intervals of a time unit. A picture luminance storage is a memory capable of storing the past records of luminance information within a fixed period of time (some seconds to some ten seconds). A processor is configured of a variation detector and a light source luminance determiner. Variation detector performs detection of the variability of picture luminance based on the luminance information on the current picture detected by picture luminance detector and the past records of picture luminance information stored in picture luminance storage to output variation information. Light source luminance determiner determines light source luminance based on the luminance information on the current picture detected by picture luminance detector and the variation information output from variation detector and outputs a light source information control signal.