Patent ID: 6054832
Filing Date: 2000-04-25
Classification: H04N

Abstract:
A color wheel module, comprising:a) a color wheel, said color wheel comprising multiple segments for transmitting filtered light, including a white segment;b) a motor for operating the color wheel at a predetermined rate;c) a motor controller for controlling the motor operation by determining the predetermined rate;d) a sensor operable to read an index mark on the color wheel, wherein said index mark allows the controller to know what state the color wheel is in; ande) nonvolatile memory storing calibration information concerning the white light lumens produced by a combination of said multiple segments excluding said white segment and the white light lumens produced by said white segment such that by reading said information from said nonvolatile memory, said display system can adjust operation of said display system to improve the relationship between white light produced by the combination of non-white segments and the white light produced by the white segment.