Display apparatus and display method

A display method for use in a display apparatus, the display apparatus including a display unit having a display screen divided into a plurality of regions, the display unit being controlled using an aperture ratio on a pixel-by-pixel basis, and a backlight for illuminating the back surface of the display unit, the backlight including a plurality of sets of light sources, each set being disposed so as to correspond to one of the regions, the method comprising the steps of:

• detecting the display luminance in each region of the display unit when an image is displayed on the display unit on the basis of an input image signal;
• computing the emission luminance of each light source disposed so as to correspond to one of the divided regions on the basis of the detected display luminance while taking into account an effect on the region of the other light sources not corresponding to the region;
• setting the emission luminance of each light source disposed so as to correspond to one of the divided regions to the computed emission luminance;
• computing a correction value for each pixel of the display unit on the basis of a shift amount between the set emission luminance and an optimal display luminance value for one of the divided regions of the display screen;
• and
• delivering a display driving signal generated on the basis of the computed correction value to each pixel so as to control the aperture ratio of the pixel.