Battery backup system for LED luminaire
AssigneeGE Lighting Solutions, LLC
InventorEden Dubuc
Life of this patent
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Abstract
An LED light fixture includes a housing, a controller circuit having direct current (DC) and alternating-current (AC) power inputs, a direct-current (DC) power supply unit (PSU) connected to the controller circuit, an alternating-current (AC) PSU connected to the controller circuit, and at least two groups of light emitting diodes (LEDs) operable to emit light, wherein each group includes at least one LED of a first type and at least one LED of a second type. In some embodiments, when the LED light fixture operates in a security mode the controller prevents power from flowing to the AC PSU and allows power to flow to the DC PSU to power only the first type of LEDs of the at least two groups of LEDs to emit a security light.
Claims18
An LED light fixture, comprising:
- a housing;
- a controller circuit within the housing having a direct current (DC) power input and an alternating-current (AC) power input;
- a direct-current (DC) power supply unit (PSU) connected to the controller circuit within the housing;
- an alternating-current (AC) power supply unit (PSU) connected to the controller circuit within the housing;
- and
- at least two groups of light emitting diodes (LEDs) operable to emit light, wherein each group comprises at least one LED of a first type and at least one LED of a second type;
- wherein when the LED light fixture operates in a security mode, the controller circuit prevents power from flowing to the AC PSU and allows power to flow to the DC PSU to power only the first type of LEDs of the at least two groups of LEDs to emit a security light.
A method, comprising:
- sensing, by a controller circuit, that alternating current (AC) power to an LED light fixture from an AC power source is below a predetermined AC power threshold level;
- and
- switching, by the controller circuit, from a normal mode of operation of the LED light fixture to a security mode of operation of the LED light fixture, wherein the security mode of operation comprises:
- preventing alternating current (AC) power from flowing to an AC power supply unit (PSU) and to a plurality of light-emitting diode (LED) groups, wherein each LED group comprises at least one LED of a first type and at least one LED of a second type;
- and
- allowing direct current (DC) to flow from a DC power source to a DC PSU and to only the first type of LEDs of the plurality of LED groups to emit a security light.
An LED light fixture, comprising:
- a housing;
- a controller circuit within the housing having a direct current (DC) power input and an alternating-current (AC) power input;
- at least one switch connected to the controller circuit within the housing;
- a direct-current (DC) power supply unit (PSU) connected to the at least one switch within the housing;
- an alternating-current (AC) power supply unit (PSU) connected to the at least one switch within the housing;
- and
- at least two groups of light emitting diodes (LEDs) operable to emit light, wherein each group comprises at least one LED of a first type and at least one LED of a second type;
- wherein when the LED light fixture operates in a security mode, the controller circuit controls the at least one switch to prevent power from flowing to the AC PSU and allows power to flow to the DC PSU to power only the first type of LEDs of the at least two groups of LEDs to emit a security light.
Dependencies are inferred from the claim text.