Abstract: A portable electronic device defines a substantially enclosed interior space and includes a detecting pin, a processor and a reeling mechanism. The reeling mechanism drives a headset assembly to be withdrawn from and retracted into the enclosed interior space. The reeling mechanism includes an urging member. When the headset assembly is withdrawn from the enclosed interior space, the urging member is in an elastically deformed state and the detecting pin is floating and triggers a first control signal to the processor. The processor activates the headset assembly in response to the first control signal. When the headset assembly is refracted into the enclosed interior space, the urging member returns to its original state and is electronically contacted with the detecting pin and the detecting pin triggers a second control signal to the processor. The processor inactivates the headset assembly in response to the second control signal.

Abstract: A portable electronic device includes a built-in speaker, an interface configured to connect to an external audio device to output sound, a switch, and a main microchip. The main microchip detects whether the external audio device is connected to the portable electronic device. When the external audio device is connected to the portable electronic device, the main microchip selects the audio device to output sound. When the audio device is not connected to the portable electronic device, the main microchip selects the built-in speaker to output the audio signals.

Abstract: A portable electronic device includes a main body, a camera, a primary display unit, a secondary display unit, and a screen control unit. The main body includes a first surface and a second surface opposite to the first surface. The camera is positioned in the main body. The primary display unit is positioned on the first surface. The secondary display unit is positioned on the second surface. The screen control unit is electronically connected to the camera, the primary display unit, and the secondary display unit. The screen control unit receives an image captured by the camera, processes the received image and sends the processed image to the primary display unit or the secondary display unit.

Abstract: A portable electronic device includes a built-in speaker, an interface configured to connect to an external audio device to output sound, a switch, and a main microchip. The main microchip detects whether the external audio device is connected to the portable electronic device. When the external audio device is connected to the portable electronic device, the main microchip selects the audio device to output sound. When the audio device is not connected to the portable electronic device, the main microchip selects the built-in speaker to output the audio signals.