Patent ID: 7575330
Filing Date: 2009-08-18
Classification: G03B,H04N

Abstract:
1. An apparatus for improving the operation of a digital image projector, the apparatus comprising: a video input board of the projector; a light engine of the projector, said light engine receiving video signals and generating a light output for at least one primary color there from; optics configured to transform the light output from said light engine to a focused image for projection to a display screen; a variable luminance control mechanism, configured to modify the light output to provide a correction thereto; and an adaptive luminance control module configured to receive signals from said video input board, said adaptive luminance control module producing a control signal, wherein said variable luminance control mechanism includes a dynamic iris configured to be altered in size in response to the control signal to change the luminance of the light output and provides a corrected video signal for the projector, and wherein the adaptive luminance control module comprises: