Add-on smart controller for LED lighting device

1. An add-on smart controller for an LED lighting device, comprising:

a power input port;

a power output port;

a housing;

a control unit in the housing; and

at least one control signal receiver in the control unit,

wherein:

a power input of the control unit is connected to the power input port,

a power output of the control unit is connected to the power output port,

the control signal receiver is configured to receive external control signals,

the control unit is configured to activate the power output port to supply output voltage responsive to the control unit receiving an ON signal, and

the control unit is configured to deactivate the power output port responsive to the control unit receiving an OFF signal.

2. The add-on smart controller of claim 1 , wherein the control unit includes a dimmer configured to control the output voltage or current flowing through the power output port according to the control signal.

3. The add-on smart controller of claim 2 , wherein the dimmer is a voltage-based step-dimmer and configured to control the output voltage of the power output port according to the control signal.

4. The add-on smart controller of claim 3 , wherein the voltage-based step-dimmer comprises a control signal input port, a controllable switcher, and a transformer, wherein the control signal input port is connected to the controllable switcher, wherein an output of the controllable switcher is connected to an input of the transformer, and wherein an output of the transformer is connected to the power output port.

5. The add-on smart controller of claim 4 , wherein the voltage-based step-dimmer is configured to supply power at a voltage level same as an external input power, at a voltage level lower than the external input power, or at zero voltage.

6. The add-on smart controller of claim 2 , wherein the dimmer is a voltage-based linear dimmer comprising a control signal input port, a step-motor, and an autotransformer, where the control input signal is connected to and configured to control the step-motor, wherein the step-motor is configured to control an input level of the autotransformer and cause an output level of the autotransformer to change in a linear fashion.

7. The add-on smart controller of claim 2 , wherein the dimmer is a current-based linear dimmer configured to control the effective operation cycle of an AC input current wave from 360 degrees down to 0 degree in a linear or step-wise fashion according to the control signal.

8. The add-on smart controller of claim 1 , wherein the control signal receiver is configured to receive control signals through infra-red signals, WiFi signals, Bluetooth signals, power-line-transmitted signals, a control signal line, or a combination thereof.

9. The add-on smart controller of claim 1 , wherein the control signal receiver includes an Internet network interface configured to receive control signals according to IP protocol.

10. The add-on smart controller of claim 1 , wherein the control unit includes a motion sensor configured to activate the power output port using motion detection.

11. The add-on smart controller of claim 1 , wherein the control unit includes a sound sensor configured to activate the power output port using sound detection.

12. The add-on smart controller of claim 1 , wherein the control unit includes a color tuning module configured to adjust a color temperature of the LED lighting device.

13. The add-on smart controller of claim 1 , wherein the control unit includes an ambient light sensor configured to control the dimmer automatically according to an ambient light level.

14. The add-on smart controller of claim 1 , wherein the control unit includes a rectifier configured to convert an AC input current to a DC output current.

15. The add-on smart controller of claim 1 , wherein the controller includes a connecting mechanism that attaches the controller directly onto the LED lighting device.

16. The add-on smart controller of claim 14 , wherein the connecting mechanism, disposed between the controller and the LED lighting device, comprises the power output port comprising any screw-in shaped socket, hole-shaped socket, or any existing standard electrical socket.

17. The add-on smart controller of claim 14 , wherein the power input port comprises any screw-in shaped connector, pin-shaped connector, or any existing standard electrical connector.

18. The add-on smart controller of claim 15 , wherein a shape of the power input port matches a shape of the power output port.

19. The add-on smart controller of claim 15 , wherein a shape of the power input port does not match a shape of the power output port.

20. The add-on smart controller of claims 16 , wherein the housing includes a concavity to house the socket of the power output port.

21. The add-on smart controller of claim 2 , wherein the control unit includes an ambient light sensor configured to control the dimmer automatically according to an ambient light level.