LED lamp circuit with automatic control function

The utility model discloses an LED lamp circuit with an automatic control function, comprising an AC-DC conversion circuit, an LED light emitting module, a dimming conversion circuit, a sensor module and a voltage stabilizing circuit, the AC-DC conversion circuit is used for converting AC voltage of commercial power into DC voltage and outputting the DC voltage to the dimming conversion circuit, and the sensor module is used for detecting whether someone is around; the light modulation conversion circuit is connected with the sensor module and generates corresponding electric signal output according to a detection result, the light modulation conversion circuit has a constant-current working mode, in the constant-current working mode, the light modulation conversion circuit is used for outputting corresponding direct current to the LED light emitting module according to the electric signals output by the sensor module, and the magnitude of the direct current varies along with the difference of the electric si