Apparatus and method for adjusting picture characteristics of a display device

摘要

The invention relates to a method and an apparatus for adjusting picture characteristics of a display device (DD) on the basis of light conditions in the vicinity of the display device (DD). A predetermined number of light sample values (DLSi) of a light sensor (LS) are evaluated with respect to the minimum value (MINi), the maximum value (MAXi), the average value (AVi) and the difference value (DIFFi) between the maximum value and the minimum value. If the difference value (DIFFi) is - during each successive iteration - smaller than a predetermined threshold (THRE), this indicates an ambient light change and this causes a corresponding updating of the picture characteristics control signal (PCACS) of a picture characteristics adjustment circuitry (PCAC) of a display device (DD). The method and apparatus may advantageously be used in a TV set for adjusting brightness, contrast, colour and sharpness without the need of using an additional IR filter in front of the light sensor (LS).