Two-level LED security light with motion sensor

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United States of America Patent

PATENT NO 11183039
SERIAL NO

17202879

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Abstract

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An LED security light includes an LED load and a motion sensor. The LED load is activated at dusk and deactivated at dawn by a light sensing control unit. At night, the LED load is activated for performing a low level illumination. When a motion signal is detected by the motion sensor, the LED load is switched to perform a high level illumination for a short time period and then resumes to the low level illumination. The low level illumination and the high level illumination are respectively adjustable within respective designed ranges. The LED load is driven by a switching circuitry comprising a driver to output an adequate voltage with constant electric current such that a voltage V across each LED is confined in a range Vthmax with Vth being a threshold voltage and Vmax being a maximum voltage avoiding damaging the LED.

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Patent Owner(s)

  • VAXCEL INTERNATIONAL CO., LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Chia-Teh Taipei, TW 189 1867

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