Abstract: In a positioning system configured to perform positioning using N mobile terminals, where N is an integer of two or greater, each of the mobile terminals includes a positioning device, a communication device configured to exchange information with another mobile terminal using wireless communication, and a battery configured to supply power to the positioning device and the communication device. Each of first mobile terminals that are some of the mobile terminals activates the positioning device to perform positioning of a first current position, and a second mobile terminal other than the first mobile terminals reduces at least power to be used by the positioning device, and uses information of the first current position positioned by the first mobile terminal, and the information exchanged with the first mobile terminal by the communication device to perform positioning of a second current position.

Abstract: A display system includes an HMD mounted on a head of a user, and a smartphone to which the HMD is coupled, and the smartphone includes a touch sensor that accepts a position input operation and detects coordinates of an operating position with reference to set coordinate axes, a magnetic sensor that detects an orientation of the touch sensor, and an adjustment unit that adjusts an orientation of the coordinate axes, based on a detection result of the magnetic sensor.

Abstract: A head-mounted display apparatus includes an image display unit configured to display an image, a sound output unit configured to output a sound, a mounting state determination unit configured to determine a mounting state of the head-mounted display apparatus, and an image sound output control unit configured to turn ON/OFF display, and turn ON/OFF an output of a sound, based on the mounting state. The image sound output control unit is configured to turn ON display of an image and an output of a sound when the mounting state is the first state, turn OFF display of an image and turn ON an output of a sound when the mounting state is not the first state and is the second state, and turn OFF display of an image and an output of a sound when the mounting state is not the first state and is not the second state.

Abstract: In a positioning system configured to perform positioning using N mobile terminals, where N is an integer of two or greater, each of the mobile terminals includes a positioning device, a communication device configured to exchange information with another mobile terminal using wireless communication, and a battery configured to supply power to the positioning device and the communication device. Each of first mobile terminals that are some of the mobile terminals activates the positioning device to perform positioning of a first current position, and a second mobile terminal other than the first mobile terminals reduces at least power to be used by the positioning device, and uses information of the first current position positioned by the first mobile terminal, and the information exchanged with the first mobile terminal by the communication device to perform positioning of a second current position.

Abstract: The smartphone includes an I/F unit that can be coupled with an HMD, a touch sensor, and a mode switching unit. The mode switching unit is configured to switch, depending on whether the I/F unit is coupled with the HMD, between a first mode in which an input detected by the touch sensor is received as an input in an absolute coordinate, and a second mode in which an input detected by the touch sensor is received as an input in a relative coordinate, to execute the first mode or the second mode.

Abstract: A head-mounted display apparatus includes an image display unit configured to display an image, a sound output unit configured to output a sound, a mounting state determination unit configured to determine a mounting state of the head-mounted display apparatus, and an image sound output control unit configured to turn ON/OFF display, and turn ON/OFF an output of a sound, based on the mounting state. The image sound output control unit is configured to turn ON display of an image and an output of a sound when the mounting state is the first state, turn OFF display of an image and turn ON an output of a sound when the mounting state is not the first state and is the second state, and turn OFF display of an image and an output of a sound when the mounting state is not the first state and is not the second state.

Abstract: A display system includes an HMD mounted on a head of a user, and a smartphone to which the HMD is coupled, and the smartphone includes a touch sensor that accepts a position input operation and detects coordinates of an operating position with reference to set coordinate axes, a magnetic sensor that detects an orientation of the touch sensor, and an adjustment unit that adjusts an orientation of the coordinate axes, based on a detection result of the magnetic sensor.

Abstract: A display system includes an HMD mounted on a head of a user, and a smartphone to which the HMD is coupled, and the smartphone includes a touch sensor that accepts a position input operation and detects coordinates of an operating position with reference to set coordinate axes, a magnetic sensor that detects an orientation of the touch sensor, and an adjustment unit that adjusts an orientation of the coordinate axes, based on a detection result of the magnetic sensor.

Abstract: A display system includes an HMD mounted on a head of a user, and a smartphone to which the HMD is coupled, and the smartphone includes a touch sensor that accepts a position input operation and detects coordinates of an operating position with reference to set coordinate axes, a magnetic sensor that detects an orientation of the touch sensor, and an adjustment unit that adjusts an orientation of the coordinate axes, based on a detection result of the magnetic sensor.

Abstract: The smartphone includes an I/F unit that can be coupled with an HMD, a touch sensor, and a mode switching unit. The mode switching unit is configured to switch, depending on whether the I/F unit is coupled with the HMD, between a first mode in which an input detected by the touch sensor is received as an input in an absolute coordinate, and a second mode in which an input detected by the touch sensor is received as an input in a relative coordinate, to execute the first mode or the second mode.

Abstract: A device for sending or receiving a video according to a video wireless transmission standard for transmitting a video via one-to-one wireless communication, includes: a connection control unit which controls establishment of connection according to the video wireless transmission standard between the device and a connection destination device; and a state changing unit which changes the state of one of the device and the connection destination device prior to the establishment of the connection, if both of the device and the connection destination device are in a sending-side state of functioning as a sending-side device of the video, or if both of the device and the connection destination device are in a receiving-side state of functioning as a receiving-side device of the video.

Abstract: A device for sending or receiving a video according to a video wireless transmission standard for transmitting a video via one-to-one wireless communication, includes: a connection control unit which controls establishment of connection according to the video wireless transmission standard between the device and a connection destination device; and a state changing unit which changes the state of one of the device and the connection destination device prior to the establishment of the connection, if both of the device and the connection destination device are in a sending-side state of functioning as a sending-side device of the video, or if both of the device and the connection destination device are in a receiving-side state of functioning as a receiving-side device of the video.

Abstract: A head mounted display which allows a user to visually recognize a virtual image, includes an image display unit that enables the user to visually recognize the virtual image, a display processing unit that causes the image display unit to form the virtual image indicating a plurality of images used to operate the head mounted display and a background image, and a motion detection unit that detects a motion of the head of the user. The display processing unit changes the background image according to a motion of the head of the user.

Abstract: A video display system that transmits a video from a video transmission device equipped with neither a display unit nor an operation unit for realizing a user interface to a video reception and display device according to a video radio transmission standard for transmitting a video through one-to-one direct radio communication and performs display. The video transmission device includes a connection control unit configured to control establishment of first connection for connecting the video transmission device and the video reception and display device according to the video radio transmission standard and second connection for connecting the video transmission device and the video reception and display device peer-to-peer prior to the establishment of the first connection. The connection control unit starts processing of the second connection according to any one of a request from the video reception and display device and occurrence of an opportunity in the video transmission device.

Abstract: A head mounted display which allows a user to visually recognize a virtual image, includes an image display unit that enables the user to visually recognize the virtual image, a display processing unit that causes the image display unit to form the virtual image indicating a plurality of images used to operate the head mounted display and a background image, and a motion detection unit that detects a motion of the head of the user. The display processing unit changes the background image according to a motion of the head of the user.

Abstract: A vibrating gyroscope includes two input buffers each arranged to input voltage signals appearing at respective detection electrodes of one of two piezoelectric vibrators. An adding circuit adds up output voltages of the respective input buffers. An amplitude control circuit automatically controls a loop gain such that an output voltage of the adding circuit has a substantially constant amplitude. A phase-shift circuit controls the phase of a drive voltage supplied to the piezoelectric vibrators such that the piezoelectric vibrators oscillate by positive feedback. Two differential amplifier circuits each amplify a voltage difference corresponding to an angular velocity about an axis. Two synchronous detection circuits each perform detection using a synchronizing signal generated from an oscillation signal, and detect a voltage signal corresponding to the angular velocity.

Abstract: A piezoelectric vibrator of a vibration gyro vibrates in response to a drive voltage Vdrv input into a drive electrode, and when deformed by a Coriolis force, generates detection voltages Vagc, between which a potential difference corresponds to the deformation, at detection electrodes. An AGC circuit outputs a drive voltage Vdrv while performing automatic gain control so that the detection voltages Vagc have a given amplitude. A phase inversion circuit and a BTL amplifier circuit output a BTL voltage Vbtl, whose phase is opposite to the detection voltage Vagc and whose amplitude has been increased, to the detection electrodes via detection resistances. The AGC circuit reduces the detection voltages Vagc in order to prevent the drive voltage Vdrv from exceeding a design upper limit value V?drv.

Abstract: A piezoelectric vibrator of a vibration gyro vibrates in response to a drive voltage Vdrv input into a drive electrode, and when deformed by a Coriolis force, generates detection voltages Vagc, between which a potential difference corresponds to the deformation, at detection electrodes. An AGC circuit outputs a drive voltage Vdrv while performing automatic gain control so that the detection voltages Vagc have a given amplitude. A phase inversion circuit and a BTL amplifier circuit output a BTL voltage Vbtl, whose phase is opposite to the detection voltage Vagc and whose amplitude has been increased, to the detection electrodes via detection resistances. The AGC circuit reduces the detection voltages Vagc in order to prevent the drive voltage Vdrv from exceeding a design upper limit value Vdrv.

Abstract: An angular velocity sensor includes vibrators, an internal circuit that drives the vibrators to detect an angular velocity signal, a circuit substrate on which components such as an IC and a passive component defining the internal circuit are disposed, and electrically connects the vibrators and the components, and a cap that covers a surface of the circuit substrate and encloses the vibrators and internal circuit. An output signal processed by the internal circuit is output from an external electrode provided on the back surface of the circuit substrate. Vibrator inspection electrodes are provided on the back surface of the circuit substrate, and the vibrator inspection electrodes are electrically connected to surface electrodes of the vibrators. Thus, electrical characteristics of the vibrators can be directly measured after assembly.

Abstract: A vibrating gyroscope includes two input buffers each arranged to input voltage signals appearing at respective detection electrodes of one of two piezoelectric vibrators. An adding circuit adds up output voltages of the respective input buffers. An amplitude control circuit automatically controls a loop gain such that an output voltage of the adding circuit has a substantially constant amplitude. A phase-shift circuit controls the phase of a drive voltage supplied to the piezoelectric vibrators such that the piezoelectric vibrators oscillate by positive feedback. Two differential amplifier circuits each amplify a voltage difference corresponding to an angular velocity about an axis. Two synchronous detection circuits each perform detection using a synchronizing signal generated from an oscillation signal, and detect a voltage signal corresponding to the angular velocity.