Patent ID: 9153179
Filing Date: 2015-10-06
Classification: G09G

Abstract:
1. A method for operating a system that includes a graphics controller and a display with a display timing controller and a backlight unit, wherein the graphics controller and the display communicate over a communications path, and wherein the display timing controller includes a pipeline, the method comprising: with the graphics controller, transmitting initial video data to the display timing controller, wherein the initial video data comprises black pixel data; with the display timing controller, asserting an interrupt during the transmission of the initial video data by the graphics controller that informs the graphics controller that the display timing controller is initialized and ready to receive valid video data; with the graphics controller, detecting the interrupt; in response to detection of the interrupt, transmitting valid video data in place of the black pixel data; with the display timing controller, asserting an additional interrupt during the transmission of the valid video data to inform the graphics controller that the pipeline contains a frame of the valid video data; with the graphics controller, detecting assertion of the additional interrupt; and in response to detection of the assertion of the additional interrupt, using the graphics controller to turn on the backlight unit to provide backlight for the display.