Solid-state lighting with remote controls
A light-emitting diode (LED) luminaire control system comprising a control circuit is adopted to provide remote control signals to operate an external luminaire that comprises LED arrays and a power supply. The LED luminaire control system further comprises a relay switch, a remote controller, and a transceiver circuit. When the remote control signals are initiated by the remote controller with phase-shift keying (PSK) signals transmitted, the transceiver circuit can demodulate such PSK signals and subsequently send decoded commands to the LED luminaire control system to control the luminaire by turning on and off and dimming up and down the external luminaire.
1. A light-emitting diode (LED) luminaire control system, comprising:
a power supply converter circuit configured to be coupled to alternate-current (AC) mains to convert a line voltage from the AC mains into a first direct-current (DC) voltage;
a first voltage converter circuit configured to convert the first DC voltage into a second DC voltage less than the first DC voltage;
a control circuit comprising a relay switch, wherein the relay switch comprises a power sensing coil with a set voltage and a reset voltage and is configured to couple the line voltage from the AC mains to an external power supply unit to operate thereof when enabled, subsequently powering up external one or more LED arrays coupled with the external power supply unit; and
a transceiver circuit comprising a receiver and a decoder and controller, the transceiver circuit coupled to the control circuit and configured to receive and demodulate various phase-shift keying (PSK) band-pass signals and to output either a first pulse signal or a second pulse signal,
wherein:
the relay switch further comprises a first input electrical terminal and a pair of input electrical terminals;
the first input electrical terminal is configured to couple to a hot wire of the line voltage from the AC mains; and
the pair of input electrical terminals are coupled to the power sensing coil and configured to receive either the set voltage or the reset voltage and to respectively set up an on-state or an off-state of the relay switch.
2. The LED luminaire control system of claim 1 , wherein the control circuit further comprises a driver circuit powered by the first DC voltage and configured to receive either the first pulse signal or the second pulse signal, wherein the driver circuit is coupled to the power sensing coil and configured to respectively convert the first pulse signal and the second pulse signal into a third pulse signal and a fourth pulse signal that has a reverse polarity with the third pulse signal, and wherein either the third pulse signal or the fourth pulse signal is boosted to reach a level of either the set voltage or the reset voltage to either set or reset the power sensing coil.
3. The LED luminaire control system of claim 2 , wherein the relay switch further comprises an output electrical terminal configured to relay the hot wire of the line voltage from the AC mains to the external power supply unit when the third pulse signal appears at the pair of input electrical terminals to set up the on-state, and wherein the relay switch maintains the on-state until the fourth pulse signal is received for the off-state.
4. The LED luminaire control system of claim 2 , wherein the control circuit further comprises a pulse-width modulation (PWM)-to-voltage converter coupled to the transceiver circuit and configured to convert either a PWM signal or a complementary PWM signal into a 1-to-10 V (volt) DC voltage to control the external power supply unit by providing an LED driving current to dim up or dim down the external one or more LED arrays.
5. The LED luminaire control system of claim 4 , wherein the transceiver circuit is further configured to output either the PWM signal or the complementary PWM signal in response to one of the various PSK band-pass signals received.
6. The LED luminaire control system of claim 4 , wherein the PWM-to-voltage converter comprises a digital-to-analog converter circuit coupled to the external power supply unit and configured to transform either the PWM signal or the complementary PWM signal into the 1-to-10 V DC voltage to operate a dimming circuit in the external power supply unit.
7. The LED luminaire control system of claim 6 , wherein the PWM-to-voltage converter further comprises an interface circuit coupled between the transceiver circuit and the digital-to-analog converter circuit and configured to buffer either the PWM signal or the complementary PWM signal in a way that the digital-to-analog converter circuit powered by the first DC voltage is operated without affecting an operation of the transceiver circuit powered by the second DC voltage.
8. The LED luminaire control system of claim 7 , wherein the interface circuit comprises an inverter configured to convert the complementary PWM signal into the PWM signal.
9. The LED luminaire control system of claim 8 , wherein the digital-to-analog converter circuit comprises a low-pass filter assembly configured to receive the PWM signal and further configured to convert the PWM signal into the 1-to-10 V DC voltage.
10. The LED luminaire control system of claim 9 , wherein the digital-to-analog converter circuit further comprises a transistor coupled between the low-pass filter assembly and the external power supply unit and configured to couple the 1-to-10 V DC voltage to the external power supply unit when the transistor is turned on.
11. The LED luminaire control system of claim 10 , wherein the digital-to-analog converter circuit further comprises a second voltage converter circuit configured to convert the first DC voltage into a third DC voltage greater than the first DC voltage, and wherein the third DC voltage is configured to set up a bias voltage to turn on the transistor in a way that the 1-to-10 V DC voltage is applied to the external power supply unit without affecting an operation of the PWM-to-voltage converter.
12. The LED luminaire control system of claim 1 , wherein the decoder and controller comprises a microcontroller, a microchip, or a programmable logic controller.
13. The LED luminaire control system of claim 1 , further comprising:
a remote controller comprising a remote user interface and a transmitter circuit, the remote controller configured to send the PSK band-pass signals to the transceiver circuit in response to a plurality of signals from the remote user interface, wherein the transmitter circuit comprises a transmitter and an encoder and controller coupled between the remote user interface and the transmitter and configured to convert the plurality of signals into a plurality of sets of binary data characters, and wherein each of the plurality of sets of binary data characters comprises command data.
14. The LED luminaire control system of claim 13 , wherein the transmitter comprises a mixer and two or more inductors, and wherein the mixer is configured to modulate the plurality of sets of binary data characters onto a carrier wave with a carrier phase shifted by 180 degrees whenever a binary data character of “0” is transmitted.
15. The LED luminaire control system of claim 13 , wherein the transmitter circuit further comprises a voltage regulator with an enable input, the voltage regulator configured to supply a voltage to operate the transmitter responsive to an enable signal from the encoder and controller being received to save battery energy in a battery powered application.
16. The LED luminaire control system of claim 13 , wherein the remote user interface comprises a plurality of touch-sensitive switches configured to generate the plurality of signals.
17. The LED luminaire control system of claim 13 , wherein at least two of the plurality of signals are respectively configured to turn on and to turn off the external one or more LED arrays via the external power supply unit.
18. The LED luminaire control system of claim 13 , wherein at least two of the plurality of signals are respectively configured to dim up and dim down the external one or more LED arrays via the external power supply unit.
19. The LED luminaire control system of claim 13 , wherein at least one of the plurality of signals functions as a transponder signal, and wherein, upon receiving the transponder signal, the transceiver circuit sends a response signal.