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US 9,320,090 B2Granted
LED output response dampening for irradiance step response output
AssigneePhoseon Technology, Inc.
InventorsOgnyan Moore, Paul Eddy
Life of this patent
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Abstract
A system and method for operating one or more light emitting devices is disclosed. In one example, the intensity of light provided by the one or more light emitting devices is adjusted responsive to follow a step change in requested lighting output.
Claims18
A system for operating one or more light emitting devices, comprising:
- a voltage regulator including a feedback input, the voltage regulator in electrical communication with the one or more light emitting devices;
- and
- a controller including non-transitory instructions to provide a dampened current to the one or more light emitting devices in response to a requested step increase in output of the one or more light emitting devices, and where a dampened current profile is based on a curvature that specifies a rate that irradiance of the one or more light emitting devices converges to a steady state value.
A method for operating one or more light emitting devices, comprising:
- selecting a current that corresponds to a desired irradiance output of the one or more light emitting devices at thermal steady state conditions of the one or more light emitting devices in response to a step increase in the desired irradiance output of the one or more light emitting devices;
- dampening the current based on one or more irradiance response attributes of the one or more light emitting devices when the one or more light emitting devices respond to the step increase in the desired irradiance output without dampening the current;
- and
- outputting the dampened current to the one or more light emitting devices.
1 more element
A method for operating one or more light emitting devices, comprising:
- in response to a step change in requested output of the one or more light emitting devices, adjusting current supplied to the one or more light emitting devices responsive to one or more parameters based on output of the one or more light emitting devices when a step change in voltage or current is applied to the one or more light emitting devices, the step change in voltage or current not occurring at a same time as the step change in the requested output of the one or more light emitting devices;
- and
- adjusting the current supplied to the one or more light emitting devices in response to initial conditions of the one or more light emitting devices, the initial conditions being other than zero.
Dependencies are inferred from the claim text.