Supply assembly for a LED lighting module
AssigneeKoninklijke Philips Electronics N.V.
InventorsRonny Andreas Antonius Maria Jacobs, Bertrand Johan Edward Hontele, Antonius Adrianus Maria Marinus
Life of this patent
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Abstract
A supply assembly for a LED lighting module, comprising a supply unit to which the LED lighting module can be connected and a burst control unit which is capable of switching the power supply unit on and off with a burst frequency (fburst) so as to control the mean light output. Preferably, the burst control unit is provided with a pulse duration modulator for controlling the pulse length (T pulse) during which the supply unit is operative.
Claims8
A supply assembly for a LED lighting module, comprising:
- a power supply unit, including a converter which supplies a ripple DC current or a ripple DC voltage, means for coupling the LED lighting module to the power supply unit, and a burst control unit which produces signal pulses for switching the power supply unit on and off with a burst frequency (fburst) so as to control the mean light output of the LED lighting module, characterized in that the converter has a ripple frequency which is an integer multiple of the burst frequency (fburst), and the ripple DC voltage or ripple DC current is synchronized with the signal pulses of the burst control unit.
A supply assembly for a LED lighting module, comprising:
- a supply unit coupled to a source of supply voltage, means for coupling the LED lighting module to the supply unit, and a burst control unit, which operates independently of the source of supply voltage, for switching the power supply to the LED lighting module on and off with a burst frequency (fburst) so as to control the mean light output of the LED lighting module,
- characterized in that the burst control unit produces pulses and comprises a pulse-duration modulator which controls the length (Tpulse) of the pulses during which the supply unit is in the on-state, and
- the burst control unit switches the supply unit on and off with the burst frequency (fburst)
- wherein the pulse-duration modulator switches a converter of the supply unit on and off at the burst frequency (fburst), and the converter has a ripple DC voltage or ripple DC current at a ripple frequency which is an integer multiple of the burst frequency (fburst), the supply assembly further comprising;
- means for synchronizing the ripple DC voltage or ripple DC current with a burst control signal of the burst control unit.
A supply assembly for a LED lighting module, comprising:
- a supply unit, means for coupling the LED lighting module to the supply unit, and a burst control unit for switching the supply unit on and off with a burst frequency (fburst) so as to control the mean light output of the LED lighting module, and further comprising:
- means for coupling the supply assembly to an AC mains voltage, wherein the burst frequency is an integer multiple of the frequency of the AC mains voltage, and
- means for synchronizing a burst control signal of the burst control unit with the mains voltage.
Dependencies are inferred from the claim text.