Patent ID: 11893868
Assignee: VAXCEL INTERNATIONAL CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  F  H  Y | IPC F  G  H

Claim 102:
103. The multi-level LED security light according to claim 97, wherein when the light-emitting unit is in the turned-on state, a light intensity of the first LED load and a light intensity of the second LED load are respectively adjustable, wherein the controller in response to the at least one external control signal received respectively outputs a first PWM signal to control the first conduction rate of the first semiconductor switching device and a second PWM signal to control the second conduction rate of the second semiconductor switching device with an arrangement that the first conduction rate of the first semiconductor switching device and the second conduction rate of the second semiconductor switching device are reversely and complementarily adjusted such that the sum of the first electric power delivered to the first LED load and the second electric power delivered to the second LED load is maintained at a constant level while the diffused light color temperature generated by the light emitting unit thru the light diffuser is proportionately adjusted according to the at least one external control signal to perform a color temperature tuning of the first diffused light color temperature of the first level illumination or the second diffused light color temperature of the second level illumination.