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US 9,867,252 B2Granted
Load current control circuit
AssigneePhoseon Technology, Inc.
InventorSalvatore Battaglia
Life of this patent
Estimating the term…
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 current feedback from the one or more light emitting devices.
Claims14
A system for operating one or more light emitting devices, comprising:
- a voltage regulator including a voltage feedback input receiving input from a voltage divider network electrically coupled to cathodes of the one or more light emitting devices, the voltage regulator in electrical communication with an input of a current controlling device and cathodes of the one or more light emitting devices, the voltage regulator including an error amplifier;
- and
- a current sensing device positioned in a current path through which a current passes through the one or more light emitting devices, the current sensing device in electrical communication with a controller different than the voltage regulator, the controller including instructions to adjust light intensity of the one or more light emitting devices.
A system for operating one or more light emitting devices, comprising:
- a current controlled voltage regulator including a current feedback input, the current controlled voltage regulator in electrical communication with the one or more light emitting devices, the current controlled voltage regulator including an error amplifier that is electrically coupled to a pulse width modulation generator, and where an output of the pulse width modulation generator is input to a buck stage amplifier;
- and
- a current sensing device positioned in a current path through which a current passes through the one or more light emitting devices, the current sensing device in direct electrical communication with the current feedback input.
Dependencies are inferred from the claim text.