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Continuously variable color optical device

  • US 4,965,561 A
  • Filed: 03/13/1989
  • Issued: 10/23/1990
  • Est. Priority Date: 01/08/1986
  • Status: Expired due to Term
First Claim
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1. A method of controlling a color of a variable color optical device which comprises a plurality of light sources for emitting upon activation light signals of respectively different primary colors and means for combining said light signals to obtain a composite light signal of a composite color, by repeatedly substantially simultaneously activating said light sources for brief time intervals by pulses of a substantially constant amplitude to cause them to emit light signals of said primary colors, and by selectively controlling durations of the time intervals of activation of respective light sources to control the portions of said primary colors, to thereby control the color of said composite light signal.

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