Device and method for addressing power to a load selected from a plurality of loads
AssigneeKoninklijke Philips N.V.
InventorAlwin Rogier Martijn Verschueren
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Abstract
The invention relates to a device and method for addressing power to at least a selected load from a plurality of loads, in particular light sources in solid state lighting applications, such as decorative indoor and outdoor illumination for buildings or cars, by timing a power signal such as to power a selected load when said common timed power signal is switched to said load under control of a delayed clock signal.
Claims12
An electrical circuit for addressing power to at least a selected load from a plurality of loads, the circuit comprising a plurality of cascaded subcircuits, each subcircuit for powering one of the loads, each subcircuit comprising:
- a first input terminal configured to receive a timed common power signal, wherein the timed common power signal is an essentially rectangular pulse signal;
- a delay element configured to delay a clock signal received on a second input terminal, the delay element further configured to output a delayed clock signal on an output terminal, wherein the delay element comprises a resonance circuit, which comprises an inductor and a capacitor;
- and
- a switching element configured to switch the timed common power signal to the load, the switching under control of the delayed clock signal.
A method for addressing power to at least a selected load from a plurality of loads, in a circuit comprising a plurality of cascaded subcircuits, each subcircuit for powering one of the loads, the method comprising:
- receiving a timed common power signal, wherein the timed common power signal is an essentially rectangular pulse signal;
- receiving a clock signal;
- delaying the clock signal;
- outputting the delayed clock signal;
- and
- under control of the delayed clock signal, switching the common timed power signal to the load,
- wherein the clock signal is delayed by a resonance circuit comprising an inductor and a capacitor.
Dependencies are inferred from the claim text.