IMAGE DISPLAY DEVICE AND TELEVISION RECEIVING DEVICE

摘要

The purpose of the present invention is to increase a feeling of brightness and express an image with high contrast by detecting a part of an image signal that emits light, enhancing the display brightness of the light-emitting part, and displaying said part. A light emission detection unit (1) uses a prescribed feature quantity related to the brightness of an input image signal, predetermines the light emission quantity for the image signal on the basis of the relationship with the feature quantity, and detects the light emission quantity for each input image signal frame from the feature quantity. A backlight brightness stretch unit (3) stretches the light source brightness of the backlight according to the light emission quantity detected. An image signal brightness stretch unit (6) stretches the image signal according to the light emission quantity or the brightness distribution of the input image signal. A mapping unit (7) carries out mapping of the image signal by reducing the brightness of the parts without light emission. Therefore, the part of the input image signal that can be seen as emitting light is enhanced by brightness stretching of the backlight and stretching of the image signal.