LIGHT EMITTING DIODE LIGHTING DEVICE

摘要

A lighting device includes an electrical circuit for energizing an LED light source having a variable illuminating resistance. The electrical circuit includes at least one target parameter, at least one target relationship and is configured for energizing the LED light source with an energizing waveform for the LED light source having a plurality of operating parameters. The operating parameters change in response to changes in ambient conditions thereby changing the performance characteristics of the LED light source. The circuit determines at least one operating parameter, compares the operating parameter with the target parameter and changes the energizing waveform applied to the LED light source for changing the effective power applied to the LED light source for maintaining the operating parameter in conformance with a target relationship with the target parameter.

主权项

1. A lighting device comprising:
an electrical circuit configured to: energize a light emitting diode (LED) light source having a variable illuminating resistance with a first energizing waveform for the LED light source having a first current waveform and a first illuminating resistance, and cause a change in said first energizing waveform for effecting a change in said first current waveform in response to said LED light source having a second illuminating resistance different than said first illuminating resistance.