Lenovo (singapore) Pte. Ltd.

International Business Machines Corporation

Akihiko Mizutani

Fusanobu Nakamura

Mitsuhiro Yamazaki

Susumu Shimotono

Hiroshi Itoh

Hiroshi Ishikawa

Yoshitami Sakaguchi

Toru Aihara

Yasuharu Katsuno

Kunihiko Miwa

Ryoji Honda

Amrit Pant

A pointing device is disclosed. The pointing device includes an operation cap having an operation surface fitted into a stud. The stud is fixed to a keyboard plate with a screw from below together with a sensor plate. A waterproof material is provided between the stud and the keyboard plate. Multiple pressure sensors are arranged below the keyboard plate. The pressure sensors are applied with a predetermined pressure beforehand. When the operation surface is depressed, the stud and the sensor plate slide and move downward while being tilted to reduce the detection pressures of the pressure sensors. Since the pressure sensors exist below the keyboard plate, the operation cap can be downsized, and the pressure sensors can be protected from impact to the operation cap.

Pointing device for a portable computer including multiple pressure sensors located below a keyboard plate

A keyboard device is disclosed. The keyboard device includes a base, a key top, a film actuator, a position sensor, and a controller. The key top is movably arranged on the upper surface side of the base. Disposed between the base and the key top, the film actuator bends according to an applied voltage. Also disposed between the base and the key top, the position sensor detects a position of the key top. The controller applies a voltage to the film actuator in order to generate a repulsive force corresponding to the position of the key top detected by the position sensor.

Push button keyboard device

A pointing device for a portable computer is disclosed. The pointing device includes an operation cover for covering a first and second pressure sensors. The pointing device also includes one front operation surface and two rear pressure faces. Detection axes are arranged in a vertical direction, and the pressure faces are so inclined that normal lines will approach each other above the operation surface. The operation surface is applied with depression pressure P1 including a horizontal component Ph and a vertical component Pv. Even when any position on the operation surface is pressed down, pressure P2detected by the first pressure sensor becomes greater than pressure P3detected by the second pressure sensor.

Pointing device for a portable computer

A computer system having an operating environment configured for enabling boot up in a relatively short time is disclosed. A hard disk is utilized to store a boot file. A run process list registers a process to be run during boot up. When the computer system is being booted up, if the run process list registers a process to load the boot file, a process control unit does not control a process management unit, so that the process is run as usual. If the process is not registered, the process management unit suspends the process. When the suspended process is called by another process later, the process control unit makes the process resumed on demand.

Method for shortening the boot time of a computer system

A method for controlling power in a battery-powered electronic apparatus is disclosed. The electronic apparatus includes a battery, a detection unit and a power consumption estimation unit. The battery supplies electric power to each device within the electronic apparatus. The detection unit periodically detects total power consumption of the electronic apparatus and device information representing an operating state of each device within the electronic apparatus. The power consumption estimation unit estimates power consumption of the each device based on the detected total power consumption and the detected device information of each device.

Method and apparatus for controlling power in a battery-powered electronic device

Group communication is performed in the wireless ad-hoc network that has a rearrangement frequency of connection higher than the communication frequency due to the movement of communication terminalsto. Communication terminalstostores the identification information and valid time periods of adjoining terminals into the group management table, as well as its own station's time period during which it belongs to the group, and send a packet with appending its own identification information and further a valid time period of the group based on the information about the valid time periods stored in the group management table

Communication method, communication terminal, wireless ad-hoc network and cellular phone

A system and method wherein a master nodecomprises, as its primary components, a protocol stacka transceivera search schedulercommunication volume prediction meansand outside-channel, signal induced interference intensity measuring meansA slave nodecomprises, as its primary components, a protocol stacka transceiverand a search routineThe signal induced interference intensity read by the signal induced interference intensity measuring meansis transmitted to the search schedulerThe search schedulerthen employs the signal induced interference intensity to determine the total amount of the resources that are to be allocated for a search.

Method and apparatus for searching for radio station for wireless ad hoc communication network

Reference gamma compensation voltage generation circuit

A wireless hub, connected to the USB bus of a computer, and a wireless port, connected to a USB interface of a peripheral device, are provided, and wireless communication is performed between the two. The wireless hub performs communication with the computer by converting a USB packet routed to a device into a wireless signal, and a wireless signal received from a device into a USB packet. The wireless port attached to each device also converts a wireless signal into a USB packet and vice versa. While it is normal for a plurality of wireless ports to be connected to a single wireless hub, an arrangement of one wireless hub and a corresponding single wireless port is also possible. A wireless hub and a wireless port each have a device identifier assigned to them, and in the USB-wireless conversion, a non-specific destination identified by a USB address and bus topology is converted into a device identifier. Inter-host communication is enabled by using the device identifier.

Connection establishment method, communication method, state change transmission method, state changing method, wireless apparatus, wireless device, and computer

Growing community of inventors

Zushi, Japan

Akihiko Mizutani