US Patent No. 10,225,902

TWO-LEVEL SECURITY LIGHT WITH MOTION SENSOR


Patent No. 10,225,902
Issue Date March 05, 2019
Title Two-level Security Light With Motion Sensor
Inventorship Chia-Teh Chen, Taipei (TW)
Assignee Vaxcel International Co., Ltd., Carol Stream, IL (US)

Claim of US Patent No. 10,225,902

1. A life-style two-level LED security light comprising:a light-emitting unit configured with an LED load;
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 includes a plurality of LEDs divided into two sets with a first set having N number LEDs and a second set having M number LEDs;
wherein the loading and power control unit includes a controller electrically coupled to the light sensing unit, the motion sensing unit and at least two switching devices including at least a first switching device and a second switching device;
wherein the first switching device and the second switching device are connected with the first set of N number LEDs and the second set of M number LEDs, wherein the first switching device and the second switching device are controlled by the controller to be conducting or cut-off to perform at least a first switching mode and a second switching mode;
wherein in the first switching mode the power supply unit drives at least the first set of N number LEDs to perform a low level illumination with low light intensity and in the second switching mode the power supply unit drives at least the second set of M number LEDs to perform a high level illumination with high light intensity;
wherein when an ambient light detected by the light sensing control unit is lower than a predetermined value, the loading and power control unit manages to turn on the first set of N number LEDs in the light-emitting unit to generate the low level illumination;
wherein when the ambient light detected by the light sensing control unit is higher than the predetermined value, the light-emitting unit is switched off;
wherein when a motion intrusion is detected by the motion sensing unit, the loading and power control unit manages to turn on at least the second set of M number LEDs to generate the high level illumination for a predetermined duration before resuming to the low level illumination; and
wherein the controller comprises at least a programmable integrated circuit device or an application specific integrated circuit.