US Patent No. 10,433,401

SECURITY LIGHT WITH LIFESTYLE SOLUTIONS


Patent No. 10,433,401
Issue Date October 01, 2019
Title Security Light With Lifestyle Solutions
Inventorship Chia-Teh Chen, Taipei (TW)
Assignee VAXCEL INTERNATIONAL CO., LTD., Carol Stream, IL (US)

Claim of US Patent No. 10,433,401

1. A lifestyle security light, comprising:a light emitting unit, configured with at least one LED load comprising a plurality of LED chips;
a light diffuser, covering the light emitting unit to diffuse light generated by the light emitting unit;
a loading and power control unit, configured with a controller electrically coupled with a switching circuitry, for controlling and transmitting an electric power to the light emitting unit;
a photo sensor electrically coupled with the controller, for switching on the light emitting unit at dusk and switching off the light emitting unit at dawn;
a motion sensor electrically coupled with the controller, for detecting a motion intrusion;
a first external control device electrically coupled with the controller, for delivering at least one first external control signal;
a time setting algorithm, working in conjunction with the first external control device for determining a preset time point to switch the light emitting unit from performing a first illumination mode to performing a second illumination mode; and
a power supply unit;
wherein the switching circuitry is electrically connected between a power source and the light emitting unit, wherein the switching circuitry comprises at least one semiconductor switching device for controlling transmission of different electric powers delivered to the light emitting unit, wherein the controller outputs at least one control signal to control at least a conduction rate of the at least one semiconductor switching device to generate different illuminations for performing at least a first illumination mode and a second illumination mode according to signals received from the first external control device, the photo sensor and the motion sensor to characterize a lifestyle lighting solution;
wherein the first illumination mode is a general illumination mode with the motion sensor being temporarily deactivated and the second illumination mode is a motion sensing illumination mode with the motion sensor being activated;
wherein when the controller receives the at least one first external control signal generated by the first external control device, the controller operates the time setting algorithm to set the preset time point determined by a time length of a delay time tD selected by the first external control device and controlled by the controller to convert the light emitting unit from performing the first illumination mode to performing the second illumination mode;
wherein at dusk the light emitting unit is switched on by the photo sensor to perform the first illumination mode with a first level illumination, the first illumination mode with the first level illumination continues for the delay time tD until the light emitting unit is switched to perform the second illumination mode started with a second level illumination at the preset time point determined by a user;
wherein during the second illumination mode whenever a motion intrusion is detected by the motion sensor, the controller immediately and responsively manages to increase the electric power transmitted to the light emitting unit to generate a high level illumination for a predetermined time duration before resuming back to the second level illumination in the absence of any succeeding motion intrusion, wherein the light intensity of the high level illumination is equal to or higher than the light intensity of the first level Illumination and the light intensity of the first level illumination is equal to or higher then the light intensity of the second level illumination;
wherein at dawn the light emitting unit is switched off by the photo sensor to end the second illumination mode;
wherein the at least one LED load comprising a plurality of LED chips is designed with a combination of in series and/or in parallel connections of LED chips such that when incorporated with an adequate level setting of a DC power an electric current passing through each LED chip of the light emitting unit remains at a stable level and a voltage V across each LED chip of the light emitting unit complies with an operating constraint of Vth wherein when the at least one LED load is configured with a plurality of N number LED chips or N sets of LED chips electrically connected in series, a working voltage VN across the at least one LED load is confined in a domain between a minimum voltage equal to the sum of the threshold voltages of all LED chips or sets of LED chips electrically connected in series and a maximum voltage equal to the sum of the maximum operating voltages of all LED chips or sets of LED chips electrically connected in series, identically expressed as N×Vth