LED lighting controller
AssigneeRingdale, Inc.
InventorsKlaus Bollmann, Tom C. Penick
Life of this patent
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Abstract
A switch mode power supply controller provides power to a pair of light sources. The controller includes a low voltage programmable current source and adjusting elements for independently adjusting the current to the LED light sources. The controller also includes a first communication port for receiving a communication from an external device, such as a dimmer, or from another power supply controller; and a second communication port for sending a communication to a third power supply controller. These ports provide an upstream and downstream communication capability through a chain of controllers so that input from a device can be communicated upstream and downstream.
Claims6
A method of establishing and maintaining a constant LED output of plurality of series connected LED power supplies, the method comprising:
- receiving a communication from an external device via a first communication port;
- adjusting via an adjusting element the current from a first switch mode power supply controller to at least one LED light source comprising at least one diode, wherein the adjusting element fixes the current at a level for producing a predefined brightness from said at least one LED light source;
- and
- relaying the communication via a second communication port to a second switch mode power supply controller and outputting an essentially constant light level output across a system of switch mode power supply controllers connected in series.
Dependencies are inferred from the claim text.