Patent ID: 8743158
Filing Date: 2014-06-03
Classification: G09G

Abstract:
1. A method to generate a backlight sub-image of an input image, comprising: determining an array of color priority rankings associated with the input image, the array including a first portion associated with a first subset of colors that are identified as most important and a second portion associated with a second subset of colors at which the first subset of colors is not identified as most important; determining an estimated sub-image having the first and second subsets of colors, wherein the estimated sub-image comprises a high resolution representation of the input image, the estimated sub-image configured to be reproduced on a front modulator, the estimated sub-image comprising generating an initial sub-image, wherein the initial sub-image comprises a low resolution representation of the input image, wherein the initial sub-image has initial backlight drive levels which are based upon full color control of the front modulator and is configured to be reproduced on the backlight; generating a replacement sub-image based on dividing the input image by the estimated sub-image, wherein the replacement sub-image comprises a low resolution representation of the input image, the replacement sub-image configured to be reproduced on a backlight, wherein the combination of the low resolution representation of the input image reproduced on the backlight and the high resolution representation of the input image reproduced on the front modulator produces the input image; applying a combination function to the replacement sub-image and the initial sub-image to derive effective backlight drive levels; and applying a signal indicative of the effective backlight drive levels to effectuate display of the backlight sub-image; wherein determining an array of color priority rankings further comprises: identifying a maximum color value among the first and second subsets of colors; and assigning the maximum color value to each of certain ones of the first and second subsets of colors that are determined to be below a threshold value (Thresh); the method further comprising: assigning drive levels associated with the replacement sub-image to a first cutoff value represented by a function (h) when color data values associated with the input image is less than a second cutoff value represented by a function (g) and when drive levels associated with the replacement sub-image are greater than a cutoff value represented by a function (f).