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A variable color optical device comprises three light emitting diodes for emitting upon activation light signals of respectively different primary colors and means for blending the light signals to obtain a composite light signal of a composite color. The light emitting diodes are substantially simu

A variable color optical device comprises three light emitting diodes for emitting upon activation light signals of respectively different primary colors and means for blending the light signals to obtain a composite light signal of a composite color. The light emitting diodes are substantially simulteneously activated by pulses of a substantially constant amplitude. Color control selectively controls the durations of the pulses to control the portions of the primary colors, to thereby control the color of the composite light signal emitted from the optical device.

대표청구항 ▼

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 r

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.