Lighting device and circuit capable of indicating lighting lifespan

Abstract

Provided is a lighting device and a circuit, the lighting device includes a lighting diode having a rated lighting lifespan, and the lighting diode being connected to an external power source to receive power from the external power source to emit light, a controller, connected to the lighting diode so as to accumulate a lighting duration of the lighting diode when the lighting diode receives power to emit light, and an indication diode connected between the controller and a negative electrode of the external power source to receive a control signal from the controller, when the accumulated lighting duration is equal to or greater than the rated lighting lifespan, the control signal is sent, to effectively indicate the lifespan condition of the lighting device, to avoid potential safety risks of the lighting device, eye fatigue of the user, and improve the sales of the lighting device.

Dependencies are inferred from the claim text.