Patent ID: 7245327
Filing Date: 2007-07-17
Classification: G02B,G09G,H04N

Abstract:
1. A method of operating a pulse width modulated display system having a plurality of pixels each of whose illumination is controlled responsive to the actuation state of pulses within a sequence of pulse width segments, with the state of each individual pulse in a segment determining whether the corresponding pixel remains illuminated during the interval associated with that pulse, comprising the steps of: altering the actuation state of at least one pulse in a first pulse width segment to alter the pixel brightness within a range lying between first and second pixel brightness boundaries; and altering the actuation state of 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 at least one pulse within the at least one additional segment is altered so as to make nearly equal the total width of pulses becoming actuated within a segment, and the total pulse width becoming de-actuated within the same segment to achieve an incremental change in brightness.