Samsung Electronics Co., Ltd.

Moon-kyou Kim

Byung-Lae Lee

Yeong-bok Choi

An electronic device includes a system part having a plurality of electronic components; a system power supply outputting a system operating power by transforming electrical power supplied from the battery pack into the system operating power to operate the system part; a power selector outputting a system power selecting signal to turn the system part on/off according to an operation of a user; a micro control unit (MCU) controlling whether the system operating power of the system power supply is output; and an MCU power controller determining whether a control power to turn the MCU on is supplied by transforming electrical power supplied from the battery pack into the control power, based on the system power selecting signal transmitted from the power selector and controlling the MCU to be turned on/off.

System for controlling power to a system part using a control unit and wherein the power to the control unit is controlled using a power controller

A portable computer includes: a central processing unit; a connection chipset connected to the central processing unit and internally provided with a Universal Serial Bus (USB) controller, the connection chipset also having a plurality of ports allowing peripheral devices to be connected to the connection chipset; a Universal Serial Bus hub coupled to the connection chipset, the Universal Serial Bus hub having a plurality of connection ports allowing a plurality of devices to be connected to the Universal Serial Bus hub; and a switching circuit connected between the Universal Serial Bus hub and the Universal Serial Bus controller, the switching circuit serving to transmit an output signal from the Universal Serial Bus controller to the Universal Serial Bus hub when at least one of the devices connected to the Universal Serial Bus hub is driven. A control method for the portable computer provides a control function for allowing or cutting off the transmission of the output signal from the Universal Serial Bus controller to the Universal Serial Bus hub in accordance with whether or not at least one of the devices connected to the Universal Serial Bus hub is driven. In accordance with this configuration, the central processing unit can be maintained in a C-state insofar as the Universal Serial Bus hub is mounted in a fashion meeting the ACPI specification. Therefore, it is possible to achieve a reduction in power consumption.

Portable computer system and control method for reducing power consumption therein

A portable computer includes a main body equipped with a main board with a CPU, and a power supply supplying electric power to the main board, the portable computer further including a wireless communicating part including an RF transmitting and receiving part provided at the main body, electrically connected to the main board, and wirelessly transmitting and receiving predetermined data using an RF signal, and an AD converter converting an analog signal received through the RF transmitting and receiving part into a digital signal and transmitting the digital signal to the CPU, and converting a digital signal from the CPU into an analog signal and transmitting the analog signal through the RF transmitting and receiving part. The portable computer further includes a connector electrically connected to the power supply and delivering electric power from the power supply to the wireless communicating part, a wireless modem software program operating the wireless communicating part, and a control part controlling the connector to deliver electric power from the power supply to the wireless communicating part so as to operate the wireless communicating part when the wireless modem software program is executed in order to operate the wireless communicating part. Accordingly, the portable computer is capable of wireless data communication without an extra peripheral unit.

Growing community of inventors

Suwon, South Korea

Moon-kyou Kim