| 摘要 |
A multicolor optical device having at least three optically stable states includes a plurality of pairs of associated light sensors and light sources for emitting light of respectively different colors when activated. Each light source is divided by an opaque wall into a first light emitting portion and a second light emitting portion. The light signals from the first light emitting portions of all light sources are blended to obtain a composite light signal of a variable color. Separate optical feedbacks are established between the second light emitting portions and light sensors in pairs tending to stabilize the light sources in their conditions to thereby maintain the color of the composite light signal.
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