Abstract: 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 (50) that converts an input signal into an acoustic wave, housing (20) that accommodates electroacoustic transducer (50), vibrator (31) that converts the input signal into vibration, and ear pad (40) attached to housing (20). Vibrator (31) is attached to ear pad (40), and a structure between vibrator (31) and ear pad (40) is formed such that conduction of the vibration from the vibrator (31) is impeded.

Abstract: A bone conduction speaker includes a vibration driver configured to generate mechanical vibrations and air vibrations from an audio signal, a first elastic member configured to cover a portion of the vibration driver to form a space, and convert the air vibrations emitted by the vibration driver into the space, into mechanical vibrations, a second elastic member configured to be in contact with the vibration driver, and transfer the mechanical vibrations generated by the vibration driver and the mechanical vibrations received from the first elastic member, to a user, and an adjustment screw configured to act on the first elastic member to adjust at least one of the volume of the space and the distance between vibration nodes of the first elastic member.

Abstract: 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 (50) that converts an input signal into an acoustic wave, housing (20) that accommodates electroacoustic transducer (50), vibrator (31) that converts the input signal into vibration, and ear pad (40) attached to housing (20). Vibrator (31) is attached to ear pad (40), and a structure between vibrator (31) and ear pad (40) is formed such that conduction of the vibration from the vibrator (31) is impeded.

Abstract: When sound signals are transmitted to a coil in a vibration driver, a magnet vibrates according to change in magnetic field caused by the coil. A diaphragm vibrates up and down together with the coil, due to magnetic effects of the coil with respect to the magnet. A vibration plate which closes an opening of the vibration driver converts air vibrations generated by the up and down vibrations of the diaphragm into mechanical vibrations, and transmits the mechanical vibrations as high frequency vibrations. A housing which accommodates the magnet transmits the vibrations of the magnet to the outside via a spring as low frequency vibrations.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A plasma display device including a plasma display panel having electrodes through which a driving current flows; a chassis conductor holding the plasma display panel and provided with a return circuit of the driving current; a conductive case enclosing the plasma display panel and the chassis conductor; and a binding portion for binding the chassis conductor and the conductive case to each other and having a connection state different depending upon a frequency of flowing current. The binding portion has a connection state in which an amount of flowing current is less than a half of that in a short-circuited state and a connection state in which the amount is not less than a half of that in a short-circuited state.

Abstract: 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.

Abstract: A plasma display device includes a plasma display module having a plasma display panel provided with a plurality of parallel electrodes, a circuit board for applying a voltage to the electrodes, and a chassis conductor configured to hold the plasma display panel and to which a ground of a circuit board is coupled, and further includes a cylindrical conductor portion configured to surround the plasma display module.

Abstract: 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.

Abstract: 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.

Abstract: The present invention provides a plasma display device capable of maintaining an electromagnetic wave shielding effect. The plasma display device includes an optical filter having a conductive film, a frame supporting the periphery of the optical filter, a conductive member fixed to the frame, and a conductive back cover with the periphery thereof being contacted with the conductive member. Flexible conductive connecting portions are provided on the periphery of the conductive film, and the connecting portions are connected electrically, in a slack state, to the conductive member, and thereby the conductive film and the conductive member are connected electrically to each other.

Abstract: The present invention provides a plasma display device that allows, at a low cost, reliable electrical connection between a film and a conductive member with low impedance as well as prevention of friction between them. This plasma display device includes a transparent substrate, a film attached to the rear surface of the transparent substrate, a back cover, and a conductive member for connecting the film and the back cover electrically. Convex portions are formed at a predetermined distance apart from each other on the facing surface of the conductive member facing the periphery of the film, while a concave portion or concave portions are formed on the rear surface of the transparent substrate. The convex portions are thus fitted in the concave portion or the concave portions with the film interposed therebetween.