Microcontroller-based multifunctional electronic switch and lighting apparatus having the same

  • US 10,136,503 B2
  • Filed: 09/13/2017
  • Issued: 11/20/2018
  • Est. Priority Date: 10/15/2012
  • Status: Active Grant
First Claim
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1. A microcontroller based electronic switch for controlling lighting performance of an LED lamp configured with a plurality of LED lighting loads comprising:

  • a first controllable switching element, electrically connected between a power source and a first LED lighting load for emitting light with a first color temperature;

    a second controllable switching element, electrically connected between said power source and a second LED lighting load for emitting light with a second color temperature;

    at least one detection device, for detecting at least one external control signal and converting said at least one external control signal into at least one message carrying sensing signal; and

    a microcontroller to receive and interpret said at least one message carrying sensing signal generated by said at least one detection device, wherein said microcontroller through a first control pin is electrically coupled to said first controllable switching element, and through a second control pin is electrically coupled to said second controllable switching element, wherein said microcontroller through at least a third control pin receives said at least one message carrying sensing signal from said at least one detection device, wherein said microcontroller controls a conduction state or a cutoff state of said first controllable switching element through said first control pin and said microcontroller controls said conduction state or said cutoff state of said second controllable switching element through said second control pin to control electric power transmission levels from said power source respectively to said first LED lighting load and to said second LED lighting load according to said at least one message carrying sensing signal generated by said at least one detection device;

    wherein said first color temperature is higher than said second color temperature;

    wherein said at least one message carrying sensing signal is characterized with a signal format of a short voltage signal, a long voltage signal, a plurality of short voltage signals, a plurality of long voltage signals or a combination of said short voltage signal and said long voltage signal generated in a preset time interval;

    wherein said short voltage signal and said long voltage signal are respectively defined either by a time length of a voltage signal or by said time length of a series of pulse signals consecutively generated;

    wherein when said microcontroller receives said at least one message carrying sensing signal, said microcontroller manages according to said signal format of said at least one message carrying sensing signal to perform at least one of various working modes including at least an on/off switch control mode, a dimming control mode, a color temperature tuning control mode, a color temperature switching control mode, a dimming and color temperature tuning control mode, and a delay shutoff control mode;

    wherein when said first controllable switching element and said second controllable switching element are in said conduction state, said microcontroller further controls said electric power transmission levels from said power source respectively to said first LED lighting load and to said second LED lighting load according to said signal format of said at least one message carrying sensing signal received, wherein said microcontroller through said first control pin outputs a first control signal to control a conduction rate of said first controllable switching element, said microcontroller through said second control pin outputs a second control signal to control said conduction rate of said second controllable switching element;

    wherein said microcontroller is an integrated circuit programmable for generating said first control signal and said second control signal, or an application specific integrated circuit (ASIC) custom made for generating said first control signal and said second control signal.

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