Abstract: A head-mounted device including a main frame couplable to an electronic device and a support part configured to affix the main frame to a facial side of the user, and an auxiliary input device including a body, an input module disposed on at least one surface of the body and configured to process an input signal for controlling a function of the electronic device, a sensor module disposed in the body and configured to obtain sensing information in accordance with a movement of the auxiliary input device, and a connection part electrically connectable to the electronic device and configured to serve as a path through which the input signal and the sensing information are transmitted to the electronic device is provided.

Abstract: A head-mounted device including a main frame couplable to an electronic device and a support part configured to affix the main frame to a facial side of the user, and an auxiliary input device including a body, an input module disposed on at least one surface of the body and configured to process an input signal for controlling a function of the electronic device, a sensor module disposed in the body and configured to obtain sensing information in accordance with a movement of the auxiliary input device, and a connection part electrically connectable to the electronic device and configured to serve as a path through which the input signal and the sensing information are transmitted to the electronic device is provided.

Abstract: A portable charging apparatus, charging method and system for charging a battery of a mobile communication terminal are provided. The portable charging apparatus includes a first Universal Serial Bus (USB) interface connected to an external charging device, a second USB interface connected to a mobile communication terminal, and a switch located between data lines for USB communication. The method includes determining whether the portable charging apparatus is connected to the external charging device, switching on the switch when the portable charging apparatus is not connected to the external charging device, and determining whether the portable charging apparatus is connected to the mobile communication terminal, and supplying electric power from an additional battery of the portable charging apparatus to the mobile communication terminal when the portable charging apparatus is connected to the mobile communication terminal.

Abstract: A method and a mobile terminal for controlling a display unit having a plurality of display panels are provided. The method for controlling a display unit having a plurality of display panels, includes collecting screen data to be output on the display unit, generating a data enable signal to determine a time period during which the screen data in each of the display panels is to be output, and outputting the screen data on a corresponding display panel during time periods in which the data enable signals are transferred.

Abstract: A portable charging apparatus, charging method and system for charging a battery of a mobile communication terminal are provided. The portable charging apparatus includes a first Universal Serial Bus (USB) interface connected to an external charging device, a second USB interface connected to a mobile communication terminal, and a switch located between data lines for USB communication. The method includes determining whether the portable charging apparatus is connected to the external charging device, switching on the switch when the portable charging apparatus is not connected to the external charging device, and determining whether the portable charging apparatus is connected to the mobile communication terminal, and supplying electric power from an additional battery of the portable charging apparatus to the mobile communication terminal when the portable charging apparatus is connected to the mobile communication terminal.