LIGHTING APPARATUS

Abstract: a lighting apparatus includes a light source, a driver circuit, a detector circuit and a current source. the driver circuit has a first electrode and a second electrode. the first electrode and the second electrode are configured for being coupled to two first output terminals of an external ac power source and also coupled to two second output terminals of an emergency dc power module. the detector circuit is coupled to the first electrode and the second electrode for detecting a current mode at least between an ac power mode and a dc power mode. the detector circuit supplies a control signal to the current source for indicating the current source to generate a first driving current to the light source in the ac power mode and to generate a second driving current to the light source in the dc power mode.

Inventor(s): Shuisheng Wen, Zhulong Liu

CPC Classification: H05B45/10 (ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL)

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