Patent ID: 9224341
Filing Date: 2015-12-29
Classification: G09G

Abstract:
1. A method for controlling a display to display an image specified by image data, the image data comprising a plurality of color channels, the display comprising a modulator located to be illuminated by light from a plurality of groups of light sources, the light sources of each group emitting light of a corresponding one of the plurality of colors, a spatial distribution of light from each of the groups of light sources on an active area of the modulator controllable by applying light source control signals to the light sources of the group, the method comprising: processing the image data to select one of the plurality of colors which exhibits a greatest degree of spatial clustering in at least a part of the image; based at least in part on the color channel of the image data corresponding to the selected color determining first pixel driving values for pixels of the modulator corresponding to at least the part of the image; determining light source control signals for the light sources of one or more colors other than the selected color based on the first pixel driving values and color channels of the image data corresponding to the one or more colors other than the selected color; and applying the first pixel driving values to drive the pixels of the modulator to selectively allow light from the active area to pass to a viewing area and while applying the first pixel driving values to drive the pixels of the modulator: wherein selecting one of the plurality of colors which exhibits a greatest degree of spatial clustering is based on a determination of a number of contiguous pixels in the part of the image that have similar pixel values for each of the plurality of colors.