Patent ID: 7495642

Claim:
A method of operating a pulse width modulated display system having a plurality of pixels each of whose illumination is controlled responsive to pulses within a sequence of pulse width segments, with the state of each individual pulse in a segment determining whether the corresponding pixet remains illuminated during the interval associated with that pulse, comprising the steps of: actuating at least one pulse in a first in brightness pulse width segment to alter the pixel brightness within a range lying between first and second pixel brightness values; and actuating at least one pulse within at least one additional pulse width segment to alter the pixel brightness above the second brightness boundary such that the pulses within the additional segments are altered unequally with the additional pulse width segments closest in time to the first segment having a greater total duration of actuated pulses for a given pixel brightness compared to the additional pulse width segments farther in time from the first segment wheren the pulse width modulated display system displays a colored image by sequentially projecting each of three primary colors and wherein each color comprises a separate sequence of pulse width segments that are interleaved with those of the other primary colors.