FIELD: physics.
SUBSTANCE: semiconductor electroluminescent emitter includes a semiconductor light-emitting crystal connected to a power supply, which generates light flux when supply current flows through it, wherein the crystal used emits light in at least two different spectral ranges with ratio of radiation intensities of different spectral ranges controlled by varying power supply parameters. The invention employs a power supply which is equipped with a circuit for pulse amplitude-width modulation of the supply current, which changes the amplitude and duration of supply current pulses while keeping the luminous intensity of light generated by the crystal constant.
EFFECT: more comfortable visual perception of light generated by an emitter with variable colour characteristics.
2 cl
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