Kabushiki Kaisha Toshiba

Toshiba Memory Corporation

Koichi Fujisaki

Tatsunori Kanai

Akihiro Shibata

Hiroyoshi Haruki

Tetsuro Kimura

Masaya Tarui

Satoshi Shirai

Yusuke Shirota

Haruhiko Toyama

Junichi Segawa

Atsushi Shimbo

Shiyo Yoshimura

Hideo Shimizu

Hiroshi Sukegawa

Taku Kato

Akihiro Kasahara

Hiroyuki Sakamoto

Toru Kambayashi

Shinichi Matsukawa

Yoshihiko Hirose

Yuichi Komano

Takeshi Chujoh

Yasuhiro Taniguchi

Kentaro Nakajima

Hideyuki Miyake

Hanae Ikeda

Shinobu Fujita

Shinichi Kawamura

Shinichi Yasuda

Keiko Abe

Tetsufumi Tanamoto

Takeshi Kawabata

Nobuo Shibuya

Masahiko Motoyama

Yuuki Tomoeda

Tsukasa Endo

According to an embodiment, a control device includes a calculator and a setting unit. The calculator is configured to calculate a system processing time indicating a time required for processing executed after a system, the system including a plurality of elements, power to each element being individually controlled, resumes from a sleep state in which the number of elements supplied with power is limited to a predetermined number and an operation of the system is stopped. The setting unit is configured to set a mode indicating an operation state of the system according to the system processing time calculated by the calculator when a resume factor indicating a factor for resuming the system from the sleep state occurs.

Control device, system, and computer program product

According to an embodiment, an information processing device includes a memory device, one or more peripheral devices, a processor, and a state controller. The processor is able to change between a first state, in which a command is executed, and a second state, in which an interrupt is awaited. When the processor enters the second state and if an operation for data transfer is being performed between at least one of the peripheral devices and the memory device, the state controller switches the information processing device to a third state in which power consumption is lower as compared to the first state. If the operation for data transfer is not being performed between any of the peripheral devices and the memory device, the state controller switches the information processing device to a fourth state in which power consumption is lower as compared to the third state.

Information processing device and semiconductor device

According to an embodiment, a power supply system includes a power storage unit, a changeover unit, and a control unit. The power storage unit is configured to store electric power generated by a power generation unit. The changeover unit is configured to make a changeover between a first state in which a load is connected to the power generation unit and a second state in which the load is connected to the power storage unit but not the power generation unit. The control unit is configured to perform control to make the changeover to the first state when a value obtained by subtracting a first value from a value of the electric power fed from the power generation unit is not less than a value of the electric power fed to the load. Otherwise, the control unit is configured to perform control to make the changeover to the second state.

Power supply system and power supply controller

A recognition device includes a storage unit, an acquiring unit, a first calculator, a second calculator, a determining unit, and an output unit. The storage unit stores multiple training patterns each belonging to any one of multiple categories. The acquiring unit acquires a recognition target pattern to be recognized. The first calculator calculates, for each of the categories, a distance histogram representing distribution of the number of training patterns belonging to the category with respect to distances between the recognition target pattern and the training patterns belonging to the category. The second calculator analyzes the distance histogram of each of the categories to calculate confidence of the category. The determining unit determines a category of the recognition target pattern from the multiple categories by using the confidences. The output unit outputs the category of the recognition target pattern.

Control device and computer program product

According to an embodiment, a communication device includes a register and a controller. The register receives data from an external device via an input data line. In a first state in which the communication device is able to receive the data, when a condition in which the data is not sent to the input data line continues for a certain period of time, the controller controls to switch state of the communication device to a second state in which power consumption is less than in the first state.

Communication device which decreases power comsumption by powering off unused functions when device is inactive

According to an embodiment, an information processing device includes a data obtaining unit and a data storage controller. The data obtaining unit is configured to obtain data measured by a sensor. The data storage controller is configured to store the data obtained by the data obtaining unit in a first memory of volatile nature when a sampling interval indicating an interval at which the data obtaining unit obtains the data is equal to or smaller than a threshold value. The data storage controller is configured to store the data obtained by the data obtaining unit and the data stored in the first memory in a second memory of nonvolatile nature when the sampling interval exceeds the threshold value.

Information processing device, semiconductor chip, information processing method, and computer program product

A data processing device according to embodiments comprises a data converting unit, a selecting unit, a managing unit, a updating unit, and a controller. The data converting unit is configured to convert update-data for updating at least a part of an electronic paper into processed update-data to be displayed. The selecting unit is configured to select an update-control-information identifier to be used for updating the electronic paper with the processed update-data. The managing unit is configured to store the processed update-data and a selected update-control-information identifier on a first memory. The updating unit is configured to instruct a drawing step of the electronic paper using the processed update-data and the update-control-information identifier stored on the first memory. The controller is configured to, when the processed update-data and the update-control-information identifier are stored on the first memory, execute the drawing step of the electronic paper using the processed update-data and the update-control-information identifier stored in the first memory in response to the instruction from the updating unit.

Data processing device, display control device, semiconductor chip, method of controlling display device, and computer-readable medium

According to an embodiment, an information processing apparatus that includes a processor, has a first control unit, a power storage unit, and a second control unit. The first control unit is configured to control execution of a process by the processor. The power storage unit is configured to store therein power. The second control unit is configured to control reduction of power consumption of the information processing apparatus in a case where there is a process waiting to be executed and an amount of stored power of the power storage unit is equal to or less than a first threshold.

Information processing apparatus, operation state control method, and computer program product

According to an embodiment, an information processing apparatus includes: a first control unit to control a first device; and a second control unit to control a second device. The first control unit includes a first request processing unit, a notification unit, and a first execution unit. The second request processing unit receives a second request including an instruction to start a process of the second device. The notification unit notifies the second control unit that the first control unit receives a first request. The second execution unit executes a second request received by the second request processing unit when the first device is in the active state, and executes the second request stored in the storage unit when the notification is received by the notification receiving unit.

Information processing apparatus, device control method and computer program product for saving power

According to an embodiment, an information processing apparatus is powered by a power source including a power generation unit and a power storage device that stores power generated by the power generation unit. The information processing apparatus includes a first obtaining, a second obtaining unit, and a first control unit. The first obtaining unit is configured to obtain first information indicating a value of power generated by the power generation unit. The second obtaining unit is configured to obtain second information indicating an value of stored energy in the power storage device. The first control unit is configured to start a process that is set in advance when the value of power indicated by the first information is greater than zero and the value of stored energy indicated by the second information is equal to or greater than a first threshold value.

Information processing apparatus, information processing method, and computer program product

According to an embodiment, a power control device includes a storage unit, a monitor, a determining unit, and a controller. The storage device stores a look-up table, which includes relationship between needed power consumptions and start-up conditions of an electronic device including a plurality of modules. The start-up condition of the electronic device is determined from the needed power consumption in the look-up table and specifies a power on/off status of the modules in the electronic device. The monitor monitors a voltage or available power supplied by a power source when the electronic device is activated. The determining unit determines a start-up condition corresponding to needed power consumption, which corresponds to the voltage or available power monitored by the monitor, with reference to the table. The controller sets a start-up condition of the electronic device to start up the electronic device in the start-up condition determined by the determining unit.

Selecting a startup condition of an electronic device corresponding to available power

A control device according to embodiments may control update of a target region in an electronic paper. The device may comprise a divider unit, a manager unit and an update instruction unit. The divider unit may be configured to divide the target region into a plurality of sub-regions. The manager unit may be configured to configure an update start timing of each sub-region so that flashings occurring at updating of the sub-regions appear at different timings. The update instruction unit may be configured to instruct to execute an update process of each sub-region according to the update start timings.

Control device, display device, control method and program product

According to an embodiment, a memory control device controls a memory from/to which data are read/written by a processor. The memory control device includes a clock switcher and a control signal switcher. The clock receives as input a first clock and a second clock at a higher frequency than the first clock, supplies the first clock to the memory until the second clock becomes stable, and supplies the second clock after the second clock has become stable. The a control signal switcher starts supplying, to the memory, a first control signal for initializing the memory to a state allowing reading/writing of data by the processor while the first clock is being supplied to the memory, and supplies, to the memory, a second control signal according to the reading/writing of data by the processor, after the second clock is supplied to the memory and the memory is initialized.

Memory control device, semiconductor device, and system board

According to an embodiment, a control system includes a detector, an estimating unit, a determining unit, and a controller. The detector detects an idle state. The estimating unit estimates an idle period. When the idle state is detected, the determining unit determines whether a first power consumption when writeback of data which needs to be written back to a main storage device is performed and supply of power to a cache memory is stopped, is larger than a second power consumption when writeback of the data is not performed and supply of power is continued for the idle period. The controller stops the supply of power to the cache memory when the first power consumption is determined to be smaller than the second power consumption and continues the supply of power when the first power consumption is determined to be larger than the second power consumption.

Control system, control method, and computer program product

According to one embodiment, a memory chip, which is connected to a controller that controls reading and writing of data in response to a request from an external device, includes: a memory including a special area that is a predetermined data storage area; a key storage unit that stores therein a second key that corresponds to a first key used by the external device to convert the data; a converting unit that receives, from the controller, data to be written into the special area and generates converted data by converting the data to be written using the second key; and a writing unit that writes the converted data into the special area.

Growing community of inventors

Kanagawa, Japan

Koichi Fujisaki