Variable-impedance load for LED lamps
AssigneeCRS Electronics
InventorScott A. Riesebosch
Life of this patent
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Abstract
In various embodiments, a startup circuit for a low-voltage-lighting electronic transformer includes a low-impedance output circuit. At the beginning of an AC signal cycle, the low-impedance output circuit presents a low-impedance path to the output of the transformer, thereby causing a surge of current in the transformer and initiating oscillation therein.
Claims19
A circuit for starting a transformer that powers an LED lamp, the circuit comprising:
- circuitry for presenting a low-impedance path to an output of the transformer during a beginning of an alternating-current (AC) signal cycle,
- wherein the low-impedance path causes a surge of current in the transformer during the beginning of the AC signal cycle, thereby initiating self-oscillation in the transformer and powering the LED lamp.
A method for initiating self-oscillation in a transformer that powers an LED lamp, the method comprising:
- presenting a low-impedance path to the output of the transformer during the beginning of an alternating-current (AC) signal cycle;
- and
- stimulating a surge of current in the transformer during the beginning of an AC signal cycle in response to the low-impedance path, thereby powering the LED lamp.
An LED lamp circuit for use with a self-oscillating transformer, the LED lamp circuit comprising:
- an LED lamp connected to an output of the transformer;
- and
- circuitry for presenting a low-impedance path to an output of the transformer during a beginning of an alternating-current (AC) signal cycle,
- wherein the low-impedance path causes a surge of current in the transformer during the beginning of the AC signal cycle, thereby initiating self-oscillation in the transformer and powering the LED lamp.
Dependencies are inferred from the claim text.