Abstract: A method of controlling a power source of a terminal device for communicating with a wireless wide area network, the method including: receiving a data packet; determines whether only some components of the terminal device are to be used to process the received data packet or whether an entirety of the terminal device is to be used to process the received data packet; and based on the determination result, waking up the some components of the terminal device or the entirety of the terminal device from a sleep mode to an awake mode so as to process the received data packet.

Abstract: A method, an apparatus, and a computer-readable medium to reduce power consumption of a wireless network device, the method including: receiving a packet; and determining whether to transmit the received packet to a host based on a state of the host and a packet transmission standard set for the host. Accordingly, it is possible to extend a period of use of a wireless portable terminal using an Internet protocol (IP)-based wireless network.

Abstract: A method of recording content data of system including a transcoding device connectable to a recorder, via a communication network. The method includes transcoding source content data into transcoded content data, transmitting, without recording the transcoded content data locally, the transcoded content data to the recorder via the communication network in substantially real time, and recording the transcoded content data onto a recording medium. Accordingly, the content data can be directly recorded onto a recording medium of another device, not on a recoding medium related to the transcoding device. Consequently, an apparatus including the transcoding device can obtain content data without a limit on storage capacity.

Abstract: A mobile device having an overcurrent cutoff function. In a mobile device having at least one function module, the mobile device includes a main power supply which supplies power to the mobile device, a power detection unit which detects whether power from the main power supply to the mobile device is cut off, and generates a power cutoff signal when the power is cut off, a backup power supply unit which supplies a backup power to the mobile device when the power from the main power supply to the mobile device is cut off, and a control unit which converts potential levels of the data lines and control signal lines between the control unit and the function module to a predetermined potential level in response to the power cutoff signal.

Abstract: A mobile device having an overcurrent cutoff function. In a mobile device having at least one function module, the mobile device includes a main power supply which supplies power to the mobile device, a power detection unit which detects whether power from the main power supply to the mobile device is cut off, and generates a power cutoff signal when the power is cut off, a backup power supply unit which supplies a backup power to the mobile device when the power from the main power supply to the mobile device is cut off, and a control unit which converts potential levels of the data lines and control signal lines between the control unit and the function module to a predetermined potential level in response to the power cutoff signal.

Abstract: A system of automatically indicating a user that it is time to replace a rechargeable battery of an electric apparatus includes a battery state detector for detecting whether the battery is in a low battery state, a battery output detector for detecting electrical capacity of the battery which is consumed in the electric apparatus, and a power controller for defining an electrical capacity of the battery to be considered as the life of the battery is over, as a reference electrical capacity for replacement, calculating a total consumed electrical capacity value of the battery by accumulating an electrical capacity value detected by the battery output detector when the battery is in the low battery state, and generating a battery replacement signal when the total consumed electrical capacity value is equal to or less than the reference electrical capacity for replacement.

Abstract: A computer system includes an input adapter and an external optical communication transceiver. The adapter has a plug which can be mated with the keyboard socket and a duplicated keyboard socket for allowing an input device such as a keyboard to be electrically connected with the system unit. The external optical communication transceiver is electrically connected with an optical point-to-point communication controller through the adapter. The optical communication transceiver and the adapter can be electrically connected with each other by either an extension cable or a flexible tube, thereby the computer system and other infrared-equipped devices can be aligned for user convenience's sake regardless of allowable link angle and distance.

Abstract: An apparatus and a process for precisely mounting integrated circuit packages on circuit boards. The package has guide pins on its bottom surface that mate with non standard holes on the circuit board. This simplifies the precise positioning of packages on circuit boards. When the package is properly mounted on the circuit board many leads on the bottom surface of the integrated circuit package are electrically connected with the circuit board.

Abstract: A central processing unit reset device for a portable computer system having no hardware reset switch. The central processing unit reset device includes a central processing unit having a reset terminal. A keyboard contains a plurality of discrete keys including a reset key that are independently operable by manual depression. The reset key serves as a reset switch for allowing a user to reboot an operating system of the central processing unit even when the central processing unit is locked in an infinite loop. A controller is electrically connected to the keyboard to scan the user's input through the keyboard and generate a reset request signal in response to the user's depression of said reset key on the keyboard. Finally, a reset driving circuit is electrically connected to the controller to generate a central processing unit reset signal to the reset terminal to reboot the operating system of the central processing unit.