Patent ID: 11923757
Assignee: nan
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electronic device comprising:
a power converter configured to generate DC (direct current) power based on power obtained from outside;
a state detecting unit, comprising a first photo coupler and a first diode electrically connected with the first photo coupler, configured to detect a state of a user device that comprises the electronic device or is electrically connected with the electronic device;
a driving power supply unit configured to supply driving power for the user device based on the DC power;
a power cut-off unit, comprising a first field effect transistor (FET), configured to cut off the DC power provided to the driving power supply unit according to the state of the user device; and
a control unit electrically connected with the state detecting unit,
wherein the control unit is configured to:
in response to detecting, by the state detecting unit, the state of the user device is switched from a first designated state requiring application of the driving power to a second designated state requiring cut-off of the driving power, switch a state of a first signal from a first state to a second state to turn off a light emitting diode (LED) of the first photo coupler,
wherein a transistor of the first photo coupler is turned off based on turning off the LED of the first photo coupler,
wherein an anode and a cathode of the first diode is changed to a low state based on the turning-off of the transistor of the first photo coupler,
wherein the first FET of the power cut-off unit is turned off by changing a state of a gate of the first FET to a low state by changing the cathode of the first diode connected with the gate of the first FET to the low state, and
wherein the power cut-off unit is configured to cut off the DC power provided to the driving power supply unit based on the turning-off of the first FET.