SOLID STATE LIGHTING DEVICE AND DRIVER CONFIGURED FOR FAILURE DETECTION AND RECOVERY
First Claim
1. A system, comprising:
- a light engine configured to emit light in response to a drive current, the light engine comprising a light engine controller circuit and one or more parallel strings of series-connected solid state light sources; and
a driver circuit configured to provide the drive current;
wherein the light engine controller circuit is configured to;
monitor an output voltage of the driver circuit;
detect a failure of one of the solid state light sources, the failure associated with a change in the output voltage of the driver circuit; and
transmit a first signal to the driver circuit in response to detecting a failure, wherein the driver circuit is configured to decrease the drive current in response to the first signal.
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Accused Products
Abstract
Systems and method for detecting failure in solid state light sources and recovering from the failure are provided. A light engine including a controller circuit and strings of solid state light sources emits light in response to drive current provided by a driver circuit. The controller circuit monitors an output voltage of the driver circuit, and detects a failure of one of the solid state light sources. The failure is associated with a change in the output voltage of the driver circuit. The controller circuit then transmits a first signal to the driver circuit in response to detecting a failure, and the driver circuit is configured to decrease the drive current in response to the first signal.
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Citations
18 Claims
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1. A system, comprising:
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a light engine configured to emit light in response to a drive current, the light engine comprising a light engine controller circuit and one or more parallel strings of series-connected solid state light sources; and a driver circuit configured to provide the drive current; wherein the light engine controller circuit is configured to; monitor an output voltage of the driver circuit; detect a failure of one of the solid state light sources, the failure associated with a change in the output voltage of the driver circuit; and transmit a first signal to the driver circuit in response to detecting a failure, wherein the driver circuit is configured to decrease the drive current in response to the first signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for failure detection and recovery of a lighting system, comprising:
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monitoring an output voltage of a driver circuit configured to provide a drive current to a light engine, the light engine comprising one or more parallel strings of series-connected solid state light sources; detecting a failure of one of the solid state light sources, the failure associated with a change in the output voltage of the driver circuit; transmitting a first control signal to the driver circuit in response to the failure detection; and decreasing the drive current in response to the first control signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification