Two-level led security light with motion sensor

An LED security light control device, comprising:

• a loading and power control unit;
• a light sensing control unit;
• a motion sensing unit;
• and
• a power supply unit;
• wherein the LED security light control device is electrically connected to an LED load configured with a plurality of LEDs, wherein the loading and power control unit comprises a controller and a switching circuitry, wherein the controller is electrically coupled with the switching circuitry, wherein the switching circuitry is electrically connected between a power source and the LED load, wherein the switching circuitry comprises at least a semiconductor switching device for controlling transmission of different average electric powers delivered to the LED load, wherein the controller outputs a control signal to control the switching circuitry for delivering different average electric powers from the power source to drive the LED load for
• performing at least two different illumination modes with different light intensities according to signals received from the light sensing control unit and the motion sensing unit;
• wherein the power supply unit includes an AC/DC power converter to convert AC power source into DC powers required for operating the LED security light control device, wherein the power source is a DC power source configured in the power supply unit, wherein the semiconductor switching device is an unidirectional semiconductor switching device, wherein the controller outputs the control signal to control the switching circuitry to deliver different average electric currents from the power source to drive the LED load for generating different illuminations;
• wherein a configuration of the LED load and the power source is designed to be an adequate combination of in parallel and in series connections such that the average electric current passing through each LED of the LED load remains at an adequate level and thus a voltage V across each LED complies with an operating constraint of Vth<V<Vmax featuring electrical characteristics of the LED, wherein Vth is a minimum threshold voltage required to trigger the LED to start emitting light and Vmax is a maximum operating voltage across the LED to avoid a thermal damage or burning out of LED construction.

An LED security light, comprising:

• a light-emitting unit, including an LED load configured with a plurality of LEDs;
• 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 non-angle adjustable to provide illumination projection for security protection, wherein the loading and power control unit comprises a controller and a switching circuitry, wherein the controller is electrically coupled with the switching circuitry, wherein the switching circuitry is electrically connected between a power source and the LED load of the light-emitting unit, wherein the switching circuitry comprises at least a semiconductor switching device for controlling transmission of different electric powers delivered to the LED load, wherein the controller outputs a control signal to control 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 controller controls the switching circuitry to deliver different average electric powers to the LED load such that the light-emitting unit respectively generates at least a low level illumination and at least a high level illumination according to signals received from the light sensing control unit and the motion sensing unit;
• wherein the power supply unit includes an AC/DC power converter to convert AC power into DC powers required for operating the LED security light, wherein the power source is a DC power source configured in the power supply unit, wherein the semiconductor switching device is an unidirectional semiconductor switching device, wherein the control signal is a pulse width modulation signal to control the switching circuitry for delivering different average electric currents from the power source to drive the light-emitting unit for generating different illuminations;
• wherein a configuration of the LED load and the power source is designed to be an adequate combination of in parallel and in series connections such that the average electric current passing through each LED of the LED load remains at an adequate level and thus a voltage V across each LED complies with an operating constraint of Vth<V<Vmax featuring electrical characteristics of the LED, wherein Vth is a minimum threshold voltage required to trigger the LED to start emitting light and Vmax is a maximum operating voltage across the LED to avoid a thermal damage or burning out of LED construction.

An LED security light, comprising:

• a light-emitting unit, including an LED load configured with a plurality of LEDs;
• a loading and power control unit;
• a light sensing control unit;
• a motion sensing unit;
• and
• a power supply unit;
• wherein the loading and power control unit comprises a controller and a switching circuitry, wherein the controller is electrically coupled with the switching circuitry, wherein the switching circuitry is electrically connected between a power source and the LED load of the light-emitting unit, wherein the switching circuitry comprises at least a semiconductor switching device for controlling transmission of different average electric powers delivered to the LED load, wherein the controller outputs a control signal to control 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 controller controls the switching circuitry to deliver different average electric powers to the LED load such that the light-emitting unit respectively generates at least a low level illumination and at least a high level illumination according to signals received from the light sensing control unit and the motion sensing unit;
• wherein the power supply unit is a battery module to output DC power for operating the LED security light, wherein the power source is a DC power source configured in the battery module, wherein the semiconductor switching device is an unidirectional semiconductor switching device, wherein the controller outputs the control signal to control the switching circuitry for delivering different average electric currents from the power source to drive the light-emitting unit for generating different illuminations;
• wherein a configuration of the LED load and the power source is designed to be an adequate combination of in parallel and in series connections such that the average electric current passing through each LED of the LED load remains at an adequate level and thus a voltage V across each LED complies with an operating constraint of Vth<V<Vmax featuring electrical characteristics of the LED, wherein Vth is a minimum threshold voltage required to trigger the LED to start emitting light and Vmax is a maximum operating voltage across the LED to avoid a thermal damage or burning out of LED construction.

An LED security light, comprising:

• a light-emitting unit, including 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 loading and power control unit comprises a controller and a switching circuitry, wherein the controller is electrically coupled with the switching circuitry, wherein the switching circuitry is electrically connected between a power source and the LED load of the light-emitting unit, wherein the switching circuitry comprises at least a semiconductor switching device for controlling transmission of different average electric powers delivered to the LED load, wherein the controller outputs a control signal to control 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 controller controls the switching circuitry to deliver different average electric powers to LED load such that the light-emitting unit respectively generates at least a low level illumination and at least a high level illumination according to signals received from the light sensing control unit and the motion sensing unit;
• wherein the power supply unit includes an AC/DC power converter to convert AC power of an AC power source into DC power for operating the LED security light, wherein the power source is the AC power source, wherein the LED load of the light-emitting unit is adaptable to the AC power source, wherein the switching circuitry includes a phase controller containing a bidirectional semiconductor switching device, wherein the bidirectional semiconductor switching device is connected in series between the AC power source and the LED load, and wherein the controller incorporating with a zero-crossing detection circuit outputs a time delay pulse lagging behind the zero-crossing point in each half cycle of the AC power source to control the conduction rate of the phase controller for delivering different average AC powers to drive the LED load for performing different illumination modes according to signals received from the light sensing control unit and the motion sensing unit.

An LED security light control device, comprising:

• a loading and power control unit;
• a light sensing control unit;
• a motion sensing unit;
• and
• a power supply unit;
• wherein the LED security light control device is electrically connected to an LED load configured with a plurality of LEDs;
• wherein the loading and power control unit comprises a controller and a switching circuitry, wherein the switching circuitry being coupled with the controller is electrically connected between a power source and the LED load, wherein the controller outputs a control signal to control the switching circuitry for delivering different average electric powers from the power source to drive the LED load for generating different illuminations such that the LED load respectively performs at least two illumination modes with different light intensities according to signals received from the light sensing control unit and the motion sensing unit;
• wherein the power supply unit is a battery module to output DC power for operating the LED security light control device, wherein the power source is a DC power source in the battery module, wherein the semiconductor switching device is an unidirectional semiconductor switching device, wherein the controller outputs the control signal to control the switching circuitry for delivering different average electric currents from the power source to drive the LED lamp for generating different illuminations;
• wherein a configuration of the LED load and the power source is designed to be an adequate combination of in parallel and in series connections such that the average electric current passing through each LED of the LED load remains at an adequate level and thus a voltage V across each LED complies with an operating constraint of Vth<V<Vmax featuring electrical characteristics of the LED, wherein Vth is a minimum threshold voltage required to trigger the LED to start emitting light and Vmax is a maximum operating voltage across the LED to avoid a thermal damage or burning out a semiconductor structure of the LED construction.

An LED security light control device, comprising:

• a loading and power control unit;
• a light sensing control unit;
• a motion sensing unit;
• and
• a power supply unit;
• wherein the LED security light control device is electrically connectable to an LED load, wherein the loading and power control unit comprises a controller and a switching circuitry, wherein the switching circuitry being coupled with the controller is electrically connected between a power source and the LED load, wherein the controller outputs a control signal to control the switching circuitry for delivering different average electric powers from the power source to drive the LED load for generating different illuminations, wherein the controller controls the switching circuitry to deliver different average electric powers to the LED load such that the LED load respectively performs at least two illumination modes with different light intensities according to signals received from the light sensing control unit and the motion sensing unit;
• wherein the power supply unit includes an AC/DC power converter to convert AC power of an AC power source into DC power for operating the LED security light, wherein the power source is the AC power source, wherein the LED load is adaptable to the AC power source, wherein the switching circuitry includes a phase controller containing a bidirectional semiconductor switching device, wherein the bidirectional semiconductor switching device is connectable in series between the AC power source and the LED load, and wherein the controller incorporating with a zero-crossing detection circuit outputs a time delay pulse lagging behind the zero-crossing point in each half cycle of the AC power source to control the conduction rate of the phase controller for delivering different average AC power to drive the LED load for performing different illumination modes according to signals received from the light sensing control unit and the motion sensing unit.