Electronic apparatus and controlling method thereof

A controlling method of an electronic apparatus, the electronic apparatus using a fastened mechanism to secure a first housing and a second housing of the electronic apparatus, the controlling method comprising:

• sensing an operating object within a sensing range via a first sensor unit;
• sending a first sensing signal to a control unit when the first sensor unit senses the operating object within the sensing range;
• and
• determining whether a variance of the second sensing signal at a first preset time exceeds a set value first preset time via the control unit, wherein the second sensing signal is sent out from a second sensor and the second sensor is configured to sense a motion state of the first housing;
• when the variance of the second sensing signal at the first preset time does not exceed the set value, sending a first control signal via the control unit to the fastened mechanism to release a fastened state between the first housing and the second housing;
• and
• when the variance of the second sensing signal at the first preset time exceeds the set value, maintaining the first housing and the second housing in the fastened state by not sending the first control signal via the control unit.

An electronic apparatus, configured to be a portable electronic apparatus, comprising:

• a fastened mechanism, securely fastening the electronic apparatus and a cradle;
• a control unit, coupled to the fastened mechanism;
• a first sensor unit, coupled to the control unit, sensing whether an operating object exists within a sensing range;
• and
• a power storage device, supplying power to the control unit and the first sensor unit when the electronic apparatus enters a sleep mode, such that the control unit and the first sensor unit are still operable during the sleep mode,
• wherein, when the first sensor unit senses the operating object within the sensing range, sends a first sensing signal to the control unit and the control unit, and after the control unit receives the first sensing signal, sends a first control signal to the fastened mechanism to release the fastened state between the electronic apparatus and the cradle.