Kabushiki Kaisha Toshiba

Ryuhei Yokota

Hideaki Andou

Tsukasa Nunami

Yuuji Irimoto

Akira Imamura

Tadashi Tsuji

Toshikazu Mukaiyama

Isamu Uchiyama

Ko Katsurahara

According to one embodiment, an electronic device includes a transformer connected to a power supply device, a super capacitor chargeable with an output of the transformer, a voltage converter connected to the transformer, a processor having a power supply terminal supplied with an output of the voltage converter, first and second photo-couplers connected to the power supply device, and a capacitor connected to a primary side of the second photo-coupler through a resistor. The primary side of the second photo-coupler is grounded via a pull-down resistor. The processor includes first and second terminals connected to the first and second photo-couplers and a third terminal supplied with a charging voltage of the super capacitor.

Electronic device

According to one embodiment, an electronic device includes a power supply, a port and a circuit. The port is configured to connect with an external device. The circuit is configured to control the power supply to supply a first voltage to the external device connected with the port if a system status of the electronic device is not a power-saving status, and to supply a second voltage different from the first voltage to the external device if the system status of the electronic device is the power-saving status.

Electronic device and method

According to one embodiment, an electronic apparatus includes: a presence determining module configured to determine at an interval whether a user is present based on image data output by a camera; a display power controller configured to turn on a display when the user is present and to turn off the display when the user is not present, based on a result of the presence determining module; and a detection interval controller configured to control the interval such that the interval is shorter when the display is off compared to when the display is on and the user is determined to be present.

Electronic apparatus, electronic apparatus controlling method, and computer program product

An electronic device includes: display controller; user presence determination module; user authentication module; and controller. The user presence determination module determines presence of a user based on image data received from the camera while dominating access to a camera. The user authentication module dominates access to the camera, if the display is put in a screen lock state and to perform a user authentication based on the image data. The controller turns off the display if the user present determination module determines that the user is absent and while the display has not been put in the screen lock state, and to cause the user presence determination module to release the access to the camera and to put the display in the screen lock state before turning on the display if it is determined after the display is turned off that the user is present.

Electronic device, electronic device controlling method, and computer program product

According to one embodiment, an electronic apparatus includes a housing, a display on a surface of the housing, an infrared sensor in a first region of the surface of the housing, the first region facing one side of the display, an indicator in the first region and configured to emit light, a first controller, and a second controller. The first controller turns on and off the display in accordance with a detection output of the infrared sensor. The second controller is configured to blink the indicator in a first blinking pattern in which a ratio of an ON time to a blinking cycle is smaller than that of an OFF time to the blinking cycle, when an event of which a user is notified occurs.

Growing community of inventors

Tachikawa Tokyo, Japan

Ryuhei Yokota