Patent ID: 9093031
Filing Date: 2015-07-28
Classification: G09G

Abstract:
1. A method for modifying an image to be displayed on a display comprising: (a) receiving an image to be displayed on said display having a backlight and a transmissive panel; (b) providing a backlight signal to said backlight for causing said backlight to selectively illuminate different portions of said backlight with different characteristics, wherein said characteristics include at least one of a different color and a different luminance; (c) providing a panel signal to said panel for causing said transmissive panel to selectively change its transmittivities; (d) wherein at least one of said backlight signal and said panel signal are modified for a group of pixels in such a manner that the spatial resolution of said image is reduced while the intensity value of at least one pixel of said group of pixels is modified using a plurality of different spatiotemporal dither patterns of intensity adjustments, each indexed and arranged over a plurality of pixels according to a plurality of index patterns so to correct for an off-axis artifact, each pattern of intensity adjustments maintaining the same average intensity as the at least one pixel dithered by the respective pattern, each said at least one index pattern having a diagonal line of constant index, and wherein the plurality of index patterns includes at least one pair of index patterns having a reversed polarity with respect to their respective diagonal lines of constant index and each index pattern in the pair alternating polarity temporally over each of a plurality of sequential frames, where the plurality of sequential frames by which said pair of index patterns alternates polarity is limited to an odd number of frames.