Abstract: A head-mounted display system includes a head-mounted display gear, a host, and two USB Type-C transmission lines. The two USB Type-C transmission lines are coupled between the head-mounted display gear and the host for transmitting power, data and video streams.

Abstract: A head-mounted display system includes a head-mounted display gear, a host, and two USB Type-C transmission lines. The two USB Type-C transmission lines are coupled between the head-mounted display gear and the host for transmitting power, data and video streams.

Abstract: An audio processing device, including: an audio processing unit, for transforming a source audio signal into a first audio signal and a second audio signal, wherein if the source audio signal is an audio signal with multi-channels, the first audio signal is one of the multi-channels and the second audio signal is another one of multi-channels; a wireless communication unit, for outputting a coding signal according to the second audio signal; and a speaker unit, for outputting the first audio signal only.

Abstract: A portable electronic apparatus is disclosed. The portable electronic apparatus comprises a shell, a first display module disposed on a first face of the shell, a second display module disposed on a second face of the shell, a detecting module, and a controlling module. The detecting module is used for detecting a first orientation and a second orientation of the portable electronic apparatus to determine an angle. Then, the controlling module compares the angle with a threshold angle and selectively controls the first displaying module to be in a first mode and the second displaying module to be in a second mode.