Patent ID: 9536478
Date: 2017-01-03
CPC Classifications: G09G

Claim:
1. A method of controlling power consumption of a backlight in an electronic display, wherein the backlight comprises two or more LED arrays, each corresponding to a respective color channel in an image to be displayed, the method characterized by: generating separate histograms of transmittance values for two or more of said color channels in said image, the two or more of said color channels comprising primary color channels; stretching the histograms for said two or more color channels by respective stretching factors to generate a stretched image, wherein stretching the histograms for said two or more color channels comprises stretching the histograms for each primary color channel independently; displaying the stretched image on said electronic display; and separately controlling two or more led arrays in said backlight to reduce a brightness of light emitted by said two or more led arrays in dependence on respective stretching factors applied to the histograms for the corresponding color channels.