Steuerung des dynamischen Bereichs eines Anzeigegeräts

摘要

The present invention relates to a display device (100) including an interface device (9), which can prevent degradation in resolving power of gray scales for a dark picture signal. The interface device (9) sets a dynamic range of an analog-digital converter (14) according to a peak value of an analog picture signal (Vin). Further, a luminance control signal (BCONT) for determining a luminance level of the picture to be displayed is set according to the peak value of the analog picture signal (Vin). As a result, the interface device according to the present invention can generate a display signal displaying a picture having a sufficient resolving power of gray scales even for a dark picture having a low analog picture signal level.