Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Hiroshi Kunimoto

Suguru Nakao

Hirotsugu Fusayasu

Ryo Matsubara

Kei Ichikawa

Seiji Hamada

Takeshi Ueda

Kei Tasaka

Masato Tobinaga

Masafumi Kumoi

Masaaki Ofuji

Yushi Ogino

Yusuke Matsumoto

Shouichi Mimura

Toshiyuki Nakaie

Yuki Iwamoto

Katsuo Saigou

Takatoshi Kubiura

Ichiro Hirose

A determination device includes an interface configured to acquire a vibration signal generated when a position of an object is switched, and a controller configured to determine a state of the object using the vibration signal.

Determination device, system, and determination method

A bone conduction microphone includes a housing having an opening, a microphone pad, an element support member, a piezoelectric element, and a drive plate. The microphone pad is formed in a bottomed tubular shape having a bottom portion disposed outward and a tubular portion with an outer circumference fixed to an inner circumference of the opening. The element support member has an outer circumference fixed to an inner circumference of the tubular portion, and a support portion projecting toward the bottom portion. The piezoelectric element is in a plate shape with a peripheral edge of one surface fixed to the support portion and picks up vibration. The drive plate has a diaphragm part fixed to an inward surface of the bottom portion, and the diaphragm part is provided at a center with a protrusion fixed to an element central portion on another surface of the piezoelectric element.

Bone-conduction microphone

A heartbeat detection device includes a bone conduction microphone that converts, into a signal, displacement on the body surface of a user in a thickness direction of the body of the user, and an extractor that extracts a first frequency component and a second frequency component which are included in the signal. The first frequency component is based on audio information of the user, and the second frequency component is based on heartbeat information of the user. The heartbeat detection device is capable of estimating the physical and psychological state of the user based on the heartbeat information by extracting both the audio information and the heartbeat information, from a signal that has been output by the bone conduction microphone.

Heartbeat detection device and heartbeat detection method

A bone conduction microphone is configured to convert vocal cord vibration into a sound signal. The bone conduction microphone includes a vibration collection unit configured to come into contact with a human body and collect vibration in a predetermined direction, which is included in the vocal cord vibration, and a switch configured to switch whether collection of the vibration in the predetermined direction is enabled. The switch is disposed on a side of the vibration collection unit, which is opposite to a side configured to come into contact with the human body, to allow a direction of an operation of switching whether collection of the vibration in the predetermined direction is enabled to be parallel to the predetermined direction.

Bone conduction microphone, bone conduction headset, and communication device

A bone conduction headset includes a support member having a U-shape, a pair of bone conduction speakers respectively provided to a first end of the support member and a second end of the support member, the second end being opposite to the first end, a microphone coupled to the first end, and a mute switch provided to either the first end or the second end, and configured to perform a control to lower volume on the pair of bone conduction speakers.

Bone conduction headset

A bone conduction speaker includes a vibration driver that includes a magnetic circuit and a vibration plate, and that is configured to convert sound into vibration, a vibration body configured to hold a side of the vibration driver, which is adjacent to the magnetic circuit, to come into contact with a subject, and to transmit vibration of the vibration driver to the subject, and a lid body configured to cover a side of the vibration driver, which is adjacent to the vibration plate, without being in contact with the vibration driver, and to substantially seal the vibration driver together with the vibration body.

Bone conduction speaker and bone conduction headphone device

A headset main body includes a PTT switch, bone conduction speakers, a first connector to be coupled with a microphone, and a second connector to be coupled with a transceiver. A sleeve of the first connector is coupled to a sleeve of the second connector. A ring of the first connector is coupled to a ground. A chip of the first connector is coupled to a ring of the second connector, and the chip of the first connector is further coupled, via the PTT switch, to the ground.

Sound input and output device and bone conduction headset system

When sound signals are input to a vibration driver through signal wires, the vibration driver converts the sound signals into mechanical vibrations. A second elastic member transmits the mechanical vibrations of the vibration driver to a user. On the other hand, air vibrations are generated by the vibration driver in a space formed by the vibration driver and a first elastic member. The air vibrations are converted into mechanical vibrations by the first elastic member, and are transmitted to the second elastic member. The second elastic member also transmits the mechanical vibrations transmitted from the first elastic member, to the user.

There is provided a body-sensitive vibration headphone for suppressing resonance that occurs when a vibrator that generates body-sensitive vibration vibrates. The body-sensitive vibration headphone includes electroacoustic transducer () that converts an input signal into an acoustic wave, housing () that accommodates electroacoustic transducer (), vibrator () that converts the input signal into vibration, and ear pad () attached to housing (). Vibrator () is attached to ear pad (), and a structure between vibrator () and ear pad () is formed such that conduction of the vibration from the vibrator () is impeded.

Body-sensitive vibration headphone

The present invention sufficiently reduces unwanted radiation in a plasma display panel (PDP) display device. The display device includes a PDP having a pair of electrodes, a first, a second, and a third conductive member, and a pair of driving circuits used to apply a voltage to their respective electrodes. Each conductive member has substantially the same width and height as the PDP, and the first, second, third conductive members are disposed on the rear surface of the PDP, in this order on the rear side of the PDP. The PDP and the conductive members are connected electrically to one another in the end portions of these elements, either directly or via the driving circuits, so that the direction of the current flowing in the PDP during driving and discharge coincides with the direction of the current flowing in the third conductive member, and is opposite from the direction of the current flowing in the first conductive member and the second conductive member.

Plasma display panel display device

A plasma display device capable of reducing an electromagnetic interference wave due to a driving current flowing in a plasma display panel is provided. The plasma display device includes a plasma display panel having electrodes that are parallel to each other, a driver circuit board for applying a voltage to the electrodes, a chassis conductor holding the plasma display panel and to which a ground of the driver circuit board is connected, and a first additional conductor plate provided to the chassis conductor via an insulating layer and to which grounds of at least one circuit board in circuit boards other than the driver circuit board are attached.

Plasma display device

The present invention provides a shield structure for an electronic device allowing conductive members to be connected electrically to each other at low impedance while preventing the leakage of electromagnetic waves effectively. The first conductive member and the second conductive member for enclosing the electronic device respectively have laid portions that are laid one on the other and fastened to each other at plural positions by means of screw members. Through-holes into which the screw members are to be inserted are formed on both of the laid portions. Protruding portions, which protrude toward the laid portion of the second conductive member, each are formed between the adjacent through-holes on the laid portion of the first conductive member. The protruding portions each have a shape extending in the direction connecting the adjacent through-holes and bulging from both ends toward the center thereof in a smooth curve.

Growing community of inventors

Osaka, Japan

Hiroshi Kunimoto