Patent ID: 7764252
Filing Date: 2010-07-27
Classification: G09G

Abstract:
1. An electroluminescent display system, comprising: a) a display composed of an array of regions, wherein the current to each of the regions is provided by a different pair of power lines, each having a resistance, and wherein each region includes an array of light emitting elements for emitting light and wherein the current provided to each light-emitting element is affected by the resistance of at least one of the corresponding power lines, the position of each light-emitting element along at least one of the corresponding power lines, and the current provided to other light-emitting elements within the array of light-emitting elements; b) a pixel driving circuit for independently controlling the current to each light-emitting element in response to an image signal, wherein the intensity of the light output by the light emitting elements is dependent upon the current provided to each light emitting element; and c) a display driver for receiving an input image signal and generating a converted image signal for driving the light emitting elements in the display, wherein the display driver: and wherein when the display driver modifies the input image signal such the average input image signal for light emitting elements outside the target is reduced or the input image signal for light-emitting elements within the target area and within the region having the significantly higher average input image signal is increased, so that the luminance pattern that results from displaying the image is more uniform in the target area when the converted image signal is used for driving the light emitting elements of the display than when the input image signal is used for driving the light emitting elements of the display.