OMNI voltage direct current power supply
OwnerFred H. Holmes, Kevin C. Baxter +1inventors
InventorsFred H. Holmes, Kevin C. Baxter, Ken S. Fisher
Life of this patent
Estimating the term…
Abstract
A battery operated LED lighting apparatus including: a battery outputting a battery voltage; a light emitting diode or array of light emitting diodes; and a power supply including a boost regulating circuit. The power supply being in communication with the battery and the light emitting diodes such that a constant voltage or constant current is supplied to the light emitting diodes as the battery discharges and the battery voltage falls below the output voltage. In a preferred embodiment the power supply further includes a buck regulator to maintain the proper output voltage when the battery voltage is greater than the output voltage.
Claims40
A ballasting DC/DC power supply for powering a light emitting diode (LED) based illumination device comprising:
- an input for receiving a direct current (DC) voltage;
- an output for driving at least one LED;
- a current sensor for sensing a current through said at least one LED;
- and
- a switch-mode regulator receiving said DC voltage from said input and providing a substantially constant current output to said LED by adjusting the switch-mode regulator as a function of the current sensed by said current sensor.
A ballasting DC/DC power supply for powering a light emitting diode (LED) based illumination device comprising:
- an input for receiving a DC voltage;
- an output for driving at least one LED;
- a current sensor for sensing a current through said at least one LED;
- and
- a switch-mode regulator receiving said DC voltage from said input, receiving an LED current feedback signal from said current sensor, and providing a substantially constant current to said LED by adjusting the switch-mode regulator as a function of the feedback signal from the current sensor.
A ballasting DC/DC power supply for powering a light emitting diode (LED) based illumination device comprising:
- an input for receiving a DC voltage;
- an output for driving at least one LED;
- a current sensor for sensing a current through said at least one LED;
- a switch-mode regulator operating in a buck mode, said regulator receiving said DC voltage from said input and providing a substantially constant current to said LED by adjusting the switch-mode regulator as a function of the current sensed by said current sensor.
A ballasting DC/DC power supply for powering a light emitting diode based illumination device comprising:
- an input for receiving a DC voltage;
- an output for driving at least one LED;
- a current sensor for sensing a current through said at least one LED;
- and
- a switch-mode regulator operating in a boost mode, said regulator receiving a first DC voltage from said input and providing a substantially constant current to said LED by adjusting the switch-mode regulator as a function of the current sensed by said current sensor.
A battery operated LED lighting apparatus comprising:
- one or more connectors or terminals for receiving a battery voltage output by a battery;
- at least one light emitting diode;
- and
- a power supply including a boost regulating circuit, said power supply in communication with said battery to produce an output voltage to said at least one light emitting diode such that a constant direct current is continuously supplied at a predetermined level to said at least one light emitting diode as said battery discharges regardless of voltage fluctuations across said at least one light emitting diode, wherein over at least a portion of said discharge cycle said output voltage is maintained in a range higher than said battery voltage, and wherein the power supply maintains the constant direct current by sensing electrical current directed through the at least one LED.
A battery operated LED lighting apparatus comprising:
- one or more connectors or terminals for receiving a battery voltage output by a battery;
- at least one light emitting diode;
- and
- a power supply including a buck regulating circuit, said power supply in communication with said battery to produce an output voltage to said at least one light emitting diode such that a constant direct current is continuously supplied at a predetermined level to said at least one light emitting diode as said battery discharges regardless of voltage fluctuations across said at least one light emitting diode, wherein over at least a portion of said discharge cycle said output voltage is maintained in a range equal to or lower than said battery voltage, and wherein the power supply maintains the constant direct current by sensing electrical current directed through the at least one LED.
A ballasting DC/DC power supply for powering a light emitting diode (LED) based illumination device comprising:
- an input for receiving a direct current (DC) voltage from a battery;
- an output for driving at least one LED;
- a current sensor for sensing a current through said at least one LED;
- and
- a switch-mode regulator receiving said DC voltage from said input and providing a constant current output to said LED over at least a portion of said battery's discharge cycle by adjusting the switch-mode regulator as a function of the current sensed by said current sensor.
Dependencies are inferred from the claim text.