Abstract: A computer system security apparatus and a security method thereof, the apparatus including a recognition unit to recognize identification information of a user; an operation unit to produce a result value by executing a predetermined operation on the identification information of the user and unique identification information of the computer system; and a main control unit to execute a booting of the computer system according to whether a preset password of the computer system and the result value are the same.

Abstract: A data communication apparatus and method that permits communication between two devices without having to perform a complicated initial connection procedure. A communication unit conducts data transmission/reception with an external data communication apparatus, and a controller controls the communication unit to operate in one of a network mode or a broadcast mode. The network mode conducts network communication via connection through an initial connection procedure with the external data communication apparatus and the broadcast mode receives or transmits data to/from the external data communication apparatus according to a predetermined broadcast method.

Abstract: A computer system and a control method thereof, the computer system including: a processor which executes a program; a communication unit which communicates with an external device; a main body which is provided with the processor. A cover which can be opened and shut with regard to the main body; an open/shut sensor which senses whether the cover is open or shut; and a controller which interrupts an operation of the communication unit if the open/shut sensor senses that the cover is shut.

Abstract: A data communication apparatus and method that permits communication between two devices without having to perform a complicated initial connection procedure. A communication unit conducts data transmission/reception with an external data communication apparatus, and a controller controls the communication unit to operate in one of a network mode or a broadcast mode. The network mode conducts network communication via connection through an initial connection procedure with the external data communication apparatus and the broadcast mode receives or transmits data to/from the external data communication apparatus according to a predetermined broadcast method.

Abstract: A computer system and a control method thereof, the computer system including: a processor which executes a program; a communication unit which communicates with an external device; a main body which is provided with the processor. A cover which can be opened and shut with regard to the main body; an open/shut sensor which senses whether the cover is open or shut; and a controller which interrupts an operation of the communication unit if the open/shut sensor senses that the cover is shut.

Abstract: A portable Internet service system includes a plurality of terminals which transmit uplink data for performing wireless communication; and a base station which receives the uplink data from the plurality of terminals, transmits downlink data to the plurality of terminals, and establishes a peer-to-peer function to perform a peer-to-peer transmission between the plurality of terminals.

Abstract: A computer system security apparatus and a security method thereof, the apparatus including a recognition unit to recognize identification information of a user; an operation unit to produce a result value by executing a predetermined operation on the identification information of the user and unique identification information of the computer system; and a main control unit to execute a booting of the computer system according to whether a preset password of the computer system and the result value are the same.

Abstract: A portable computer system includes a portable computer equipped with a graphic chip, and an LCD monitor receiving a video signal from the graphic chip and displaying the video signal. The portable computer system further includes an external video signal input part provided at the portable computer and receiving an external video signal from an external computer, an A/D converter provided at the portable computer and converting the external video signal inputted through the external video signal input part into a digital signal, and a control part controlling the video signal and the digital signal from the graphic chip and the A/D converter to be outputted to the LCD monitor. With this configuration, the present invention provides a portable computer system enhancing the utility of the LCD monitor by receiving an external video signal from an external computer and displaying it on an LCD monitor.

Abstract: A computer system having a wireless input device and a coordinate processing method, where a computer system having a wireless input device inputs coordinate information into a computer or a terminal, the computer system having a wireless input device includes: a signal reflecting device, associated with the wireless input device, to receive and reflect a first signal and one or more second signals, the signals reflected from the signal reflecting device to determine position coordinates of the wireless input device; and a signal processing device to generate and transmit the first signal and the one or more second signals to the signal reflecting device and to determine the position coordinates of the wireless input device associated with the signal reflecting device, based on the returned first and second signals reflected by the signal reflecting device.

Abstract: A network connection state can be conveniently changed to a wired or a wireless connection state according to whether a portable computer body is attached to a docking station including an Access Point part or not.

Abstract: A soft roaming method for a wireless local area network (LAN) and a station using the soft roaming method. The soft roaming method includes allowing a station that is associated with a first access point (AP) to obtain AP information by carrying out a channel scanning operation involving continuously switching channels, allowing the station to select a second AP with reference to the AP information when specified conditions are met, and associating the station with the second AP.

Abstract: A portable computer system including a main body having a network controller controlling a network connection, a first Hard Disk Drive (HDD), and a first disk switching part for disconnecting the first HDD from the system. A docking unit is detachably attached to the main body, and a network switching part is installed in the docking unit. The network switching part allows the network controller to selectively access either an inner network or an outer network. A switching controller is installed in a side of either the main body or the docking unit, and controls the network switching part to access either the inner network or the outer network, and controls the first disk switching part to disconnect the first HDD from the system if the network controller accesses the outer network.

Abstract: A network connection state can be conveniently changed to a wired or a wireless connection state according to whether a portable computer body is attached to a docking station including an Access Point part or not.

Abstract: A portable computer system includes a portable computer equipped with a graphic chip, and an LCD monitor receiving a video signal from the graphic chip and displaying the video signal. The portable computer system further includes an external video signal input part provided at the portable computer and receiving an external video signal from an external computer, an A/D converter provided at the portable computer and converting the external video signal inputted through the external video signal input part into a digital signal, and a control part controlling the video signal and the digital signal from the graphic chip and the A/D converter to be outputted to the LCD monitor. With this configuration, the present invention provides a portable computer system enhancing the utility of the LCD monitor by receiving an external video signal from an external computer and displaying it on an LCD monitor.