Patent ID: 7583325

Claim:
In a projection system, a method of operation, comprising: receiving a first image signal of an image to be projected on a screen, the first image signal including a first grayscale value for a valvelet of a light valve, wherein the valvelet is configured to generate an image segment to be projected on a screen location of the screen and the first grayscale value associated with a first brightness value; determining an adjustment factor for the valvelet based on a brightness value of another screen location, wherein the brightness value of the other screen location is different than the first brightness value; adjusting the first grayscale value with the adjustment factor to produce an adjusted first grayscale value, wherein the adjusted first grayscale produces an adjusted first brightness value that is equal to the brightness value of the other location; generating a second image signal including the adjusted first grayscale value for the valvelet to increase brightness uniformity of the image to be projected on the screen; and controlling the light valve based on the second image signal.