Patent ID: 8242982
Filing Date: 2012-08-14
Classification: G09G

Abstract:
1. A method of driving light-emitting blocks of an image display system, wherein the light-emitting blocks are arranged in an M×N matrix, where each of M and N is a natural number greater than 1, the method comprising: during a sensing interval, selectively switching on the light-emitting blocks of the M×N matrix so as to sense respective currents then passing through the selectively switched on ones of the light-emitting blocks arranged in the M×N matrix, wherein the matrix has M rows that are connected to a row switching part configured to switch on one or more of the M rows and N columns connected to a column switching part configured to switch on one or more of the N columns; and during a dimming interval, switching on the light-emitting blocks of the M×N matrix so as to thereby drive the light-emitting blocks by a local dimming method, where the local dimming method uses a feedback control that is responsive to the sensed currents.