• US 20160345410A1
  • Filed: 08/08/2016
  • Published: 11/24/2016
  • Est. Priority Date: 08/31/2011
  • Status: Active Grant
First Claim
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1. A LED security light, comprising:

  • a light-emitting unit, comprising a LED lamp;

    a loading and power control unit;

    a light sensing control unit;

    a motion sensing unit; and

    a power supply unit;

    wherein the light-emitting unit is angle adjustable to provide illumination projection toward desired living spaces for performing security protection;

    wherein the loading and power control unit comprises a microcontroller electrically coupled with a switching circuitry, wherein the switching circuitry is electrically connected with a power source and the LED lamp of the light-emitting unit, wherein the microcontroller outputs a control signal to control a conduction period and a cut-off period of the switching circuitry for delivering different average electric powers from the power source to drive the light-emitting unit for generating different illuminations, wherein the microcontroller controls the switching circuitry respectively to have at least a short conduction period and at least a long conduction period such that the light-emitting unit respectively generates at least a low level illumination and at least a high level illumination according to signal received from the light sensing control unit or the motion sensing unit.

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