AC to DC LED illumination devices, systems and method

摘要

Illumination devices (10), systems and methods that convert an alternating current (AC) supply (14) to a direct current (DC) for powering a plurality of light emitting diodes (LEDs) are disclosed. An illumination device (10) comprises a full wave rectifier (12) for converting the AC supply into a direct current (DC). A current limiting diode (CLD) module (16), comprising at least one CLD is coupled in series to an output of the full wave rectifier and a light emitting diode (LED) module (18) comprising a plurality of LEDs is coupled in series between an output of the CLD module (16) and the full wave rectifier (12).

主权项

1. An illumination device comprising:
a full wave rectifier for converting an alternating current (AC) supply into a direct current (DC); a current limiting diode (CLD) module coupled in series to an output of the full wave rectifier, the CLD module comprising one CLD; and a light emitting diode (LED) module directly coupled in series to an output of the CLD module and an output of the full wave rectifier, the LED module comprising a plurality of LEDs; wherein a pulsed (DC) forward current having a truncated waveform is supplied to the LED module.