ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,469,471, issued on Nov. 11.
"Pulse width modulation for phase-modulating display" was invented by Ian Kyles (West Linn, Ore.) and Howard V. Goetz (Tigard, Ore.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method is disclosed for controlling a liquid crystal pulse width modulated display. A repetition period includes A group periods, each including B modulation intervals, each modulation interval spanning H unit durations and, except for the final modulation interval of the repetition period, a remainder unit duration. A desired number N of unit duration pulses are distributed into H unit duration pulses for each modulation interval, with remainder d...