Invention Grant
- Patent Title: Solid state lighting devices providing visible alert signals in general illumination applications and related methods of operation
- Patent Title (中): 在一般照明应用和相关操作方法中提供可见警报信号的固态照明设备
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Application No.: US12910022Application Date: 2010-10-22
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Publication No.: US08264155B2Publication Date: 2012-09-11
- Inventor: Gerald H. Negley , Antony P. van de Ven
- Applicant: Gerald H. Negley , Antony P. van de Ven
- Applicant Address: US NC Durham
- Assignee: Cree, Inc.
- Current Assignee: Cree, Inc.
- Current Assignee Address: US NC Durham
- Agency: Myers Bigel Sibley & Sajovec
- Main IPC: H01J7/42
- IPC: H01J7/42
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.
Public/Granted literature
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