Patent ID: 8184112
Filing Date: 2012-05-22
Classification: G09G

Abstract:
1. A method of controlling an electroluminescent display system that receives a three-component input image signal having triplets of intensity values, the intensity values having at least an image range and a highlight range, the smallest intensity value of the highlight range being greater than the greatest intensity value of the image range, including: (a) providing a plurality of light-emitting elements for emitting red, green, and blue light and at least one additional light-emitting element for emitting at least one additional color of light, the luminance of the emitted light being responsive to a current provided to each light-emitting element; and (b) controlling the current to each light-emitting element to cause each light-emitting element to produce a corresponding luminance value, wherein the corresponding luminance value of the at least one additional light-emitting element is greater than the corresponding luminance value of at least one of the red, green, or blue light-emitting elements at the same current; (c) transforming the received three-component input image signal to a four-or-more-component drive signal and providing the four-or-more-component drive signal to control the current to each light-emitting element; and wherein the four-or-more-component drive signal is a digital signal and the drive signal for the additional light-emitting element has a greater bit-depth than the drive signal for the red, green, or blue light-emitting elements.