Video display device and television receiving device

Abstract

Areas of a video signal that represent light emission are detected, the luminance levels at which said light emission areas are displayed are enhanced, emphasizing said areas, and said luminance stretching is controlled in accordance with a set image quality mode, thereby producing consistently natural, high-quality visual imagery. A light emission detecting portion (12) counts pixels in order to generate a histogram of a prescribed feature quantity of an input video signal and identifies areas that fall within a prescribed range at the upper end of said histogram as being light emission areas. On the basis of a brightness-related index computed from the input video signal on the basis of prescribed conditions, an area-active-control/luminance-stretching portion (14) performs luminance stretching, increasing the luminance of a backlight portion (16) and reducing the luminance of non-light emission areas of the video signal, i.e. the areas other than the light emitting areas. When doing so, the area-active-control/luminance-stretching portion (14) switches between control curves, which define the relationship between the brightness-related index and the amount of stretching, in accordance with an image quality mode set by an image quality mode setting portion (19).

Dependencies are inferred from the claim text.