Light-emitting diode device, has e.g. pulse-width modulator for supplying current to two antiparallel-connected LEDs

摘要

The device comprises two diodes (1,2) which are connected in antiparallel. A pulse-width modulator (8) is provided for supplying current to the light-emitting diodes in alternating directions. The diodes are preferably mounted in the same housing, and/or emit light of different wavelengths, e.g. red and blue. A luminescence-conversion material may be provided.