Methods and apparatus for lighting unit configure for presence detection
AssigneeSignify Holding B.V.
InventorPhilip Steven Newton
Life of this patent
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Abstract
Methods and apparatus related to a LED-based lighting unit (10; 110; 210; 310; 410) having a radar for presence detection. A radar circuit (140; 240; 340A; 340B; 440) may be electrically coupled to conductive wiring (25; 125; 225; 325; 425) of the LED-based lighting unit that at least selectively powers the radar circuit and at least selectively powers the LEDs. In some implementations, an antenna coupled to the radar circuit may be formed from the conductive wiring and optionally at least partially isolated from any current flowing through the LEDs.
Claims3
A method of powering a plurality of LEDs electrically connected to one another and a radar circuit, comprising:
- providing power from a power supply to a plurality of individually-controllable groups of LEDs via a wire grid during a plurality of first time periods;
- and
- providing power from an output of at least one LED of the plurality of individually-controllable groups of LEDs to a radar circuit via said wire grid during a plurality of second time periods;
- wherein said LEDs are unpowered during said second time periods;
- and wherein said first time periods and said second time periods are mutually exclusive;
- and
- wherein each group of LEDs is individually controllable based on radar frequency signals received at said radar circuit via an antenna input.
A method of powering a plurality of LEDs electrically connected to one another and a radar circuit, comprising:
- providing power from a power supply to a plurality of individually-controllable groups of LEDs via a wire grid during a plurality of first time periods;
- and
- providing power from said power supply to a radar circuit via said wire grid during a plurality of second time periods;
- wherein said LEDs are unpowered during said second time periods;
- and wherein said first time periods and said second time periods are mutually exclusive;
- and
- wherein each group of LEDs is individually controllable based on radar frequency signals received at said radar circuit via an antenna, and the antenna is formed from at least one wire segment of the wire grid.
Dependencies are inferred from the claim text.