Patent ID: 8237633
Filing Date: 2012-08-07
Classification: G09G,H01L

Abstract:
1. An EL display adapted to receive a three-color input image signal, comprising: a) three gamut-defining EL emitters for emitting red, green, and blue colored light and a first and a second additional EL emitter for emitting two different additional colors of light having chromaticity coordinates specifying respective pseudo-blackbody points, the chromaticity coordinates of the two additional colors of light lying inside a gamut defined by the three gamut-defining emitters and near the Plankian Locus, wherein the two pseudo-blackbody points have respective correlated color temperatures that differ by at least 2000K, and wherein each EL emitter outputs light at a corresponding luminance value in response to a corresponding drive signal; b) means for providing a display white point; and c) a controller responsive to the provided display white point and the three-color input image signal for providing first separate drive signals for the three gamut-defining EL emitters and second separate drive signals for the two additional EL emitters, wherein the respective luminance values corresponding to the second separate drive signals are each a function of the input image signal and the distances between the display white point and the pseudo-blackbody points of the two additional colors.