| 主权项 |
1. A method of operating an LED system including an electronic transformer, the method comprising:
monitoring an output voltage waveform of the transformer; starting a bleed-on timing cycle upon sensing a first voltage-waveform condition and ending the bleed-on timing cycle after the determined bleed-on time has elapsed; starting a bleed-off timing cycle upon sensing a second voltage-waveform condition different from the first voltage-waveform condition, and ending the bleed-off timing cycle after the determined bleed-off time has elapsed; and engaging a bleed circuit to the transformer based on a state of the bleed-on timing cycle and disengaging the bleed circuit from the transformer based on a state of the bleed-off timing cycle, the bleed circuit being engaged for a duration adequate to ensure a minimum load on the transformer sufficient to avoid cut-off throughout the output voltage waveform, wherein the bleed-on timing cycle starts when a trailing edge of the output voltage waveform falls below a predetermined threshold and ends when a subsequent trailing edge of the output voltage waveform falls below a predetermined minimum threshold. |
