Cloned constant current LED drive circuit and method for use
AssigneeMethode Electronics, Inc.
InventorEric D. Sherriff
Life of this patent
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Abstract
A light emitting diode (LED) circuit is disclosed haying a plurality of LEDs each having a respective current path. A controller may be included for controlling the LEDs. A first set of LEDs of the plurality of LEDs are connected to respective first set transistors and a first current sink to drive a constant current through each of the first set of LEDs and the first set of LEDs includes one or more LEDs, and the LED circuit may include at least one second set of LEDs of the plurality of LEDs that are connected such that the constant current in the first set of LEDs is duplicated. in the at least one second set of LEDs and the second set of LEDs includes one or more LEDs.
Claims18
A light emitting diode (LED) lighting module comprising:
- a plurality of LEDs each having a respective current path, each of the plurality of LEDs adapted for outputting a user-selectable white or non-white light;
- an electrical connection for connecting the module to an external electrical system;
- and
- optionally a software stored in a storage media device for controlling electrical signals to the plurality of LEDs,
- wherein a first set of LEDs of the plurality of LEDs are connected to respective transistors and a current sink to drive a constant current through each of the first set of LEDs and the first set of LEDs includes one or more LEDs, and
- wherein at least one second set of LEDs of the plurality of LEDs are connected such that the constant current in the first set of LEDs is duplicated in the at least one second set of LEDs and the second set of LEDs includes one or more LEDs.
A light emitting diode (LED) circuit comprising:
- a plurality of LEDs each having a respective current path, each of the plurality of LEDs adapted for outputting at least one of a white or non-white light and;
- a controller for controlling the plurality of LEDs
- wherein a first set of LEDs of the plurality of LEDs are connected to respective first set transistors and a first current sink to drive a constant current through each of the first set of LEDs and the first set of LEs includes one or more LEDs, and
- wherein at least one second set of LEDs of the plurality of LEDs are connected such that the constant current in the first set of LEDs is duplicated in the at least one second set of LEDs and the second set of LEDs includes one or more LEDs.
Dependencies are inferred from the claim text.