TECHNIQUES FOR ASSESSING CONDITION OF LEDS AND POWER SUPPLY

摘要

Techniques are disclosed for assessing the conditions of LEDs and power supplies of solid state lighting systems. The techniques can be used, for example, to measure the capacitance of an output capacitor C in a switch-mode power supply (SMPS), and to measure the condition of the LEDs being driven by that power supply. In some cases, this assessment can be implemented in a lighting controller that controls the lighting system, which may be configured to simultaneously determine C and the conditions of LEDs. In one example case, the techniques can be implemented, for instance, in a micro-controller operating the lighting system. A lighting system implementing the techniques can be periodically assessed so as to provide real-time diagnostic capability. Numerous example embodiments of SMPS LED lighting systems will be apparent in light of this disclosure.

主权项

1. A lighting system, comprising:
a switch-off detection circuit configured to detect switch-off time in a switch-mode power supply of a lighting system, and to output a trigger signal in response to detecting switch-off time; and a controller configured to collect, in response to receiving the trigger signal, data from which conditions of the lighting system can then be assessed for desired performance.