Solid state lighting devices providing visible alert signals in general illumination applications and related methods of operation
AssigneeCree, Inc.
InventorsGerald H. Negley, Antony P. van de Ven
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Abstract
A solid state lighting apparatus includes a plurality of light emitting diodes, a sensor configured to output a sensor signal indicative of at least one operating condition of the solid state lighting apparatus, and a control circuit coupled to the sensor. The control circuit is configured to temporarily interrupt electrical current to ones of the plurality of light emitting diodes at respective intervals responsive to the sensor signal indicating that the operating condition does not meet a desired operating threshold to provide a visible indicator thereof in light emitted by the apparatus. Related devices and methods of operation are also discussed.
Claims28
A solid state lighting apparatus, comprising:
- a plurality of light emitting diodes;
- a sensor configured to output a sensor signal indicative of at least one operating condition of the solid state lighting apparatus;
- and
- a control circuit coupled to the sensor and configured to temporarily interrupt electrical current to at least one of the plurality of light emitting diodes responsive to the sensor signal to provide a visible indicator of the operating condition.
A method of operating a solid state lighting apparatus including a plurality of light emitting diodes, the method comprising:
- receiving, from a sensor, a sensor signal indicative of at least one operating condition of the solid state lighting apparatus;
- and
- temporarily interrupting electrical current to at least one of the plurality of light emitting diodes responsive to the sensor signal to provide a visible indicator of the operating condition.
A solid state lighting apparatus comprising:
- means for receiving, from a sensor, a sensor signal indicative of at least one operating condition of the solid state lighting apparatus;
- and
- means for temporarily interrupting electrical current to at least one of the plurality of light emitting diodes responsive to the sensor signal to provide a visible indicator of the operating condition.
A method of operating a solid state lighting apparatus, the method comprising:
- providing general illumination using a plurality of light emitting diodes;
- detecting an operating condition of the solid state lighting apparatus;
- and
- controlling current to at least one of the light emitting diodes in response to detecting the operating condition to provide a visible indicator of the operating condition.
Dependencies are inferred from the claim text.