Patent ID: 9445474
Filing Date: 2016-09-13
CPC Classification: F21S,F21V,F21Y,G08B,H02J,H05B,Y02B

Claim Text:
1. A two-level LED security light comprising: a light-emitting unit; 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 transistor, wherein the transistor is electrically connected in series with the power supply unit and the light-emitting unit, wherein the microcontroller with program codes outputs a pulse width modulation (PWM) signal to a gate electrode of the transistor to control the conduction period T