Systems and methods for LED control using on-board intelligence
First Claim
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1. A system for controlling a plurality of LEDs, comprising:
- a controller, wherein the controller receives a control signal from an external controller and receives a sensed condition signal from a sensor;
a driver having a 0-10V control interface, wherein the driver powers the LEDs at a level determined by the 0-10V control interface, and the driver and the controller are connected through the 0-10V control interface, wherein a voltage on the 0-10V control interface may vary between 0V and 10V;
the LEDs; and
the sensor for sensing a condition associated with the LEDs and providing the sensed condition signal,wherein the controller adjusts a voltage of the 0-10V control interface based on the control signal and the sensed condition signal.
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Abstract
Board level conditions associated with the operation of multiple LEDs are sensed and used to control a driver that powers the LEDs. The driver is controlled via a 0-10V control interface. The board-level conditions include, but are not limited to, temperature, ambient light, light intensity, operating time, time of day, current, and voltage. An on-board intelligent (OBI) controller processes the 0-10V control signal before it is provided to the driver to better control the LEDs. In some systems the OBI controller works in conjunction with a separate 0-10V controller that controls one or more luminaires.
76 Citations
13 Claims
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1. A system for controlling a plurality of LEDs, comprising:
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a controller, wherein the controller receives a control signal from an external controller and receives a sensed condition signal from a sensor; a driver having a 0-10V control interface, wherein the driver powers the LEDs at a level determined by the 0-10V control interface, and the driver and the controller are connected through the 0-10V control interface, wherein a voltage on the 0-10V control interface may vary between 0V and 10V; the LEDs; and the sensor for sensing a condition associated with the LEDs and providing the sensed condition signal, wherein the controller adjusts a voltage of the 0-10V control interface based on the control signal and the sensed condition signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for controlling an output of an LED driver, wherein the LED driver powers a plurality of LEDs and has a 0-10V control interface, comprising:
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receiving a control signal from an external controller, wherein a voltage of the control signal indicates a dimming level; receiving a sensed condition signal that indicates a condition associated with operation of the LEDs; and based on the control signal and the sensed condition signal, adjusting a voltage of the 0-10V control interface of the LED driver, wherein the voltage of the 0-10V control interface may vary between 0V and 10V. - View Dependent Claims (8, 9, 10)
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11. A circuit for controlling a plurality of LEDs, comprising:
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a first input line and a second input line, wherein the first and second input lines are capable of being connected to a 0-10V control interface of a dimmer; a transistor connected between the first input line and the second input line, wherein a collector of the transistor is connected to the first input line and an emitter of the transistor is connected to the second input line; a thermistor, wherein a first end of the thermistor is connected to the first input line and a second end of the thermistor is connected to a base of the transistor and a resistor; and the resistor, wherein a first end of the resistor is connected to the thermistor and the base of the transistor and a second end of the resistor is connected to the second input line, wherein the first input line and the second input line are capable of being connected to a 0-10V interface of a driver. - View Dependent Claims (12, 13)
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Specification