Patent ID: 8174546

Claim:
A controller for displaying an image on a display comprising a light source layer and a display layer, the controller comprising: means for determining driving values for light sources of the light source layer; means for determining an effective luminance pattern of the light source layer at a first spatial resolution lower than a spatial resolution of the display layer; means for increasing the spatial resolution of the effective luminance pattern to a second spatial resolution corresponding to the resolution of the display layer; means for determining driving values for elements of the display layer based at least on image data and an output of the means for increasing the spatial resolution of the effective luminance pattern, wherein the means for increasing the spatial resolution of the effective luminance pattern comprises means for performing interpolation on data defining the effective luminance pattern, and wherein the means for determining the effective luminance pattern of the light source layer comprises: means for determining a contribution to the effective luminance pattern for each of a plurality of components of a point spread function for light sources of the light source layer; and, means for combining the contributions to the effective luminance pattern of each of the components.