Patent ID: 9093858
Filing Date: 2015-07-28
Classification: F21S,F21V,F21Y,H01L,H02J

Abstract:
1. An illumination system, comprising a light-emitting device; a first switch element electrically connected to an external power source, the first switch element configured for receiving an external voltage supplied by the external power source; a driving device electrically connected between the light-emitting device and the first switch element, the driving device configured for converting the external voltage to a direct-current power signal for driving the light-emitting device to emit light when the first switch element is switched on; a detecting circuit connected across both ends of the first switch element, the detecting circuit configured for detecting a voltage across the first switch element and converting the voltage to a detecting signal; an arithmetic unit electrically connected to the driving device and the detecting circuit, the arithmetic unit configured for performing an arithmetic operation on the direct-current power signal and the detecting signal to generate a control signal; and a power supply unit electrically connected to the arithmetic unit, the power supply unit configured for supplying power for the light-emitting device according to the control signal and configured for driving the light-emitting device to emit light when the external power source is interrupted.