Abstract: An electronic device is provided. The electronic device includes a main unit including a first top surface, a first bottom surface opposite to the first top surface, and a first side surface configured to connect the first top surface and the first bottom surface, and at least one module unit including a second top surface, a second bottom surface opposite to the second top surface, and a second side surface configured to connect the second top surface and the second bottom surface. The module unit may be configured to couple to and uncouple from the main unit or another module unit in a state where one of the second top surface, the second bottom surface, and the second side surface faces one of the first top surface, the first bottom surface, and the first side surface. When the module unit is coupled to the main unit, the module unit may be electrically connected with the main unit.

Abstract: An electronic device is provided. The electronic device includes a main unit including a first top surface, a first bottom surface opposite to the first top surface, and a first side surface configured to connect the first top surface and the first bottom surface, and at least one module unit including a second top surface, a second bottom surface opposite to the second top surface, and a second side surface configured to connect the second top surface and the second bottom surface. The module unit may be configured to couple to and uncouple from the main unit or another module unit in a state where one of the second top surface, the second bottom surface, and the second side surface faces one of the first top surface, the first bottom surface, and the first side surface. When the module unit is coupled to the main unit, the module unit may be electrically connected with the main unit.

Abstract: A computer system includes a system part, a connector to which an external device is connected, a communication unit which performs communication with the external device, and a control unit which is connected between the connector and the communication unit to monitor a state of a predetermined recognition signal applied from the external device when the system part is in a standby mode. The control unit performs a predetermined function corresponding to the monitored state of the recognition signal. When the system part is in the standby mode, the system part may be switched to an operation mode based on the recognition signal from the external device. Additionally, a predetermined charging power is output to an external device in response to the predetermined recognition signal applied from the external device connected to the connector while the system part exists in the standby mode.

Abstract: A host apparatus, a user terminal apparatus, a method of controlling a charger, and a method of communication thereof. The host apparatus includes: a connector which includes a terminal to which the user terminal apparatus is connected; a power supplier which supplies power to the connector; a controller which, if the host apparatus operates in a first operation mode when the user terminal apparatus is connected to the connector through the terminal, charges a battery of the user terminal apparatus with the power supplied from the power supplier; and a charging maintainer which, if the host apparatus operates in a second operation mode, charges the battery with power supplied from the power supplier.

Abstract: A computer system includes a system part, a connector to which an external device is connected, a communication unit which performs communication with the external device, and a control unit which is connected between the connector and the communication unit to monitor a state of a predetermined recognition signal applied from the external device when the system part is in a standby mode. The control unit performs a predetermined function corresponding to the monitored state of the recognition signal. When the system part is in the standby mode, the system part may be switched to an operation mode based on the recognition signal from the external device. Additionally, a predetermined charging power is output to an external device in response to the predetermined recognition signal applied from the external device connected to the connector while the system part exists in the standby mode.

Abstract: A resonance electric current detection apparatus is disclosed. The above apparatus comprises a detection unit which detects an electric current by a resonance of an inductor L and a capacitor C and outputs to a control unit, and a control unit which controls an electric current detected by the detection unit. With the above construction, It is possible to easily perform a LC resonance electric current control, a speaker network resonance control, an automatic gain control and a LED control by forming the detected resonance electric current as a load circuit or controlling a surge voltage which is generated in a non-load state.

Abstract: A portable computer provided with a power switch, a drive for an optical device, an audio signal processing unit processing the audio data of a disk inserted into the optical device drive, and an inputting unit formed with a plurality of selection buttons for inputting movement and selection of a pointing cursor. Each selection button of the inputting unit has a selection inputting function in response to a plurality of operations of the optical device drive. The audio signal processing unit is supplied with assistant power while system power is turned off. The audio signal processing unit controls the optical device drive based on selection by the selection button as inputted. With this configuration, the present invention provides a portable computer wherein an inputting unit, for movement and selection of the pointing cursor when the optical device drive is operated while the power switch is turned off, can be utilized as a control button involved in reproduction of the optical device drive.

Abstract: Disclosed are a battery pack having a dummy battery function, a portable electronic apparatus and a control method thereof. The portable electronic apparatus, includes a system body connectable to a plurality of components; a battery to supply power to the system body; a battery charging part to charge the battery with power externally supplied; a user selecting part selectable between a dummy mode and a normal mode related to the battery; and a controller to control the battery charging part to not charge the battery when the dummy mode is selected through the user selecting part and control the battery charging part to charge the battery when the normal mode is selected through the user selecting part. With this configuration, a dummy battery function is provided avoid the performance of a battery from deterioration and the durability of the battery from being reduced.

Abstract: A computer system having a system memory; a power management controller to control to supply power to a system; a flash memory; and a controller to supply a power saving standby mode to enable the power saving standby mode and to control the power management controller to store an operating state stored in the system memory to the flash memory and to cut power supply to the system when the power saving standby mode is selected. The power saving standby mode using the flash memory is supplied in an operating system or in the BIOS of the system so that time to enter the standby mode or return to the normal mode is sharply reduced and power consumption to operate the standby mode is reduced. Further, a detachable flash memory is used in the normal state so that the operation state when the computer system enters the standby mode is separately stored and the operation state when the computer system enters the standby mode is started any time during the normal mode.

Abstract: A portable computer provided with a power switch, a drive for an optical device, an audio signal processing unit processing the audio data of a disk inserted into the optical device drive, and an inputting unit formed with a plurality of selection buttons for inputting movement and selection of a pointing cursor. Each selection button of the inputting unit has a selection inputting function in response to a plurality of operations of the optical device drive. The audio signal processing unit is supplied with assistant power while system power is turned off. The audio signal processing unit controls the optical device drive based on selection by the selection button as inputted. With this configuration, the present invention provides a portable computer wherein an inputting unit, for movement and selection of the pointing cursor when the optical device drive is operated while the power switch is turned off, can be utilized as a control button involved in reproduction of the optical device drive.