221results about "Bending wave transducers" patented technology

An exciter-equipped glass diaphragm, includes: a glass plate structure; and a first exciter and a second exciter, which are attached to the glass plate structure, in which, when a lowest resonant frequency of the first exciter is F1(0) (Hz), and a lowest resonant frequency of the second exciter is F2(0) (Hz), the exciter-equipped glass diaphragm satisfies: 3≤|F1(0)−F2(0)|≤100 (Hz).

The invention provides a sound production device and electronic equipment. The sound production device comprises a first transducer and a second transducer, the first transducer comprises a first base and a first vibration assembly, the outer periphery of the first vibration assembly is fixed to the first base, the second transducer comprises a second base and a second vibration assembly, and the second vibration assembly is fixed to the second base. The second vibration assembly and the first vibration assembly are oppositely arranged at an interval. A vibration space is defined by the middle of the first vibration assembly and the second transducer, an acoustic channel is defined by the second vibration assembly and the outer periphery of the first vibration assembly, and the vibration space is communicated with an external space through the acoustic channel. The sounding device is simple in structure and small in size.

Display device. A display device is disclosed, including a display panel configured to display an image by emitting light; a rear surface structure configured to surround a side surface and a rear surface of the display panel; a vibration generation device connected with the rear surface structure and configured to vibrate the display panel; a rear sound emission portion located between the display panel and the rear surface structure; and a rear sound guide member located between the display panel and the rear surface structure to surround the vibration generation device in a spiral shape and configured to be connected with the rear sound emission portion.

The vibration apparatus may include a vibration generating portion including a first vibration portion and a second vibration portion overlapping the first vibration portion, a first cover member at a first surface of the vibration generating portion, a second cover member at a second surface different from the first surface of the vibration generating portion, and a signal cable including first, second and third signal lines connected to the first vibration portion and the second vibration portion and disposed between the first cover member and the second cover member. An apparatus for vibration may include a passive vibration member and the vibration apparatus.

In an acoustic vibration device that vibrates panel material, a drip-proof structure is added while suppressing an increase in the height dimension. [Solution] The acoustic vibration device 1 comprises a frame 11 fixed to the ceiling interior material 501 side between the ceiling interior material 501 and the outer panel 502 of the vehicle, a vibration unit 12 including a cylindrical body 4 and a magnetic circuit unit 3, a voice coil 52 arranged in the magnetic gap of the magnetic circuit unit 3, a bobbin 51 around which the voice coil 52 is wound, a first damper 61 connecting the cylindrical body 4 and the bobbin 51, a second damper 62 connecting the cylindrical body 4 and the frame 11, and a drip-proof cover 2 to prevent water droplets falling from the outer panel 502 side from adhering to the second damper 62. The drip-proof cover 2 is formed in an annular shape with an open center, is attached to the vibration unit 12, and is positioned on the outer circumference side of the magnetic circuit unit 3 and above the second damper 62. The upper part of the magnetic circuit unit 3 is positioned above the drip-proof cover 2, passing through the opening 23 of the drip-proof cover 2.

An acoustic excitation device includes a frame fixed to a panel material, an excitation unit including a cylindrical body and a magnetic circuit unit attached to an inner circumference of the cylindrical body, and a drip-proof cover that prevents water droplets falling from above the panel material, wherein the drip-proof cover is attached to the excitation unit.

The present invention relates to vehicle glazing suitable for acoustic transmission, comprising an exciter and a glazed assembly, the exciter comprising a connecting portion and a movable portion, the glazing comprising at least one spacer, the connecting portion comprising a mounting portion and a suspended portion, the spacer being fixedly mounted on the mounting portion and on the glazed assembly, the suspended portion having a first face and the glazed assembly having a second face, the first face being arranged facing the second face, the glazing comprising a cavity arranged between the first face and the second face, the cavity being formed by the first face and preferably by the second face.

Embodiments of this application provide a display terminal, and relate to the field of display technologies, to resolve a problem that an overall screen-to-body ratio decreases due to a receiver disposed on a display terminal. The display terminal includes a middle frame, a display module, a vibrator, and at least one vibrating sheet. The display module is connected to the middle frame, and accommodation space is formed between the display module and the middle frame. At least a part of the vibrator is disposed in the accommodation space. The vibrator is connected to the display module or the middle frame. The vibrating sheet is located in the accommodation space. An upper surface of the vibrating sheet is connected to a lower surface of the display module. A lower surface of the vibrating sheet faces the middle frame. In a direction perpendicular to the upper surface of the vibrating sheet, the vibrator and the vibrating sheet are configured to drive the display module to vibrate up and down.

A sound apparatus comprises a vibration member, an enclosure at a rear surface of the vibration member, a connection member between the vibration member and the enclosure, movably supporting an edge of the vibration member, and a vibration apparatus vibrating the vibration member.

The invention relates to a glazing unit comprising: – a glass sheet or a glazed assembly (1) comprising at least one hole; and – at least one audio exciter (2) mounted on a base; wherein the base is inserted into the at least one hole in the glass sheet or glazed assembly (1). The invention also relates to methods for manufacturing such a glazing unit.

The piezoelectric loudspeaker comprises a piezoelectric vibration generator 500 coupled to the planar diaphragm 100 by a connection element 400. The planar diaphragm comprises a plurality of plate-lik

The present disclosure provides a display device and a vehicle including the display device. The display device includes: a display panel configured to display an image; a front member on a front surface of the display panel; a driving circuit on a rear surface of the display panel and connected to the display panel; a support frame configured to surround side surfaces of the display panel and side surfaces of the driving circuit; a first support member supported by the support frame and on the rear surface of the display panel; and a vibration generation module supported by the first support member to vibrate the display panel.

This disclosure relates to a complete set of equipment, particularly a display panel that generates sound. The display device according to this disclosure includes: a display module; a back cover disposed on the rear surface of the display module; a recessed portion recessed into the back cover from a first surface of the back cover with a first width and a first depth; a penetrating portion penetrating from a second surface of the back cover to the recessed portion with a second width and a second depth, the second width being less than the first width, and the second depth corresponding to the difference between the thickness of the back cover and the first depth; and a first piezoelectric vibration unit disposed at a stepped portion between the penetrating portion and the recessed portion.

A sound apparatus includes a vibration member having a plate shape; and a first vibration device, a plurality of second vibration devices, and a third vibration device configured to each have a plate shape including a first main surface and a second main surface opposite to each other and configured to vibrate based on a driving signal input thereto. The first main surface of the first vibration device may be connected to the vibration member, a portion of the second main surface of the first vibration device and a portion of the first main surface of the third vibration device may be connected to each other by an elastic member so that the first main surface of the third vibration device is spaced apart from and opposite to the second main surface of the first vibration device by a certain distance. A portion of each of the plurality of second vibration devices may be connected to a portion of the third vibration device and a portion of the first main surface of each of the plurality of second vibration devices may be connected to a portion of the vibration member by an elastic member, so that the plurality of second vibration devices extend radially from the third vibration device in a plane. A driving signal input to the first vibration device may have a phase opposite to a phase of a driving signal input to the third vibration device.

The invention relates to an electromagnetic actuator, which is designed to be connected to a backside of a plate like structure and which comprises an annular coil arrangement and a magnet system being designed to generate a magnetic field transverse to the annular coil arrangement. The annular coil arrangement and the magnet system are connected to each other by a plurality of springs, which are arranged inside of the annular coil arrangement.

The invention provides an acoustic electric exciter with opposite magnetic force and spring force and an output device. The invention relates to an electrodynamic exciter having a voice coil arrangement, a magnetic circuit system and a spring arrangement, in which the magnetic circuit system comprises a (annular) outer magnetic circuit part which extends radially beyond the voice coil arrangement, in which the voice coil arrangement and the outer magnetic circuit part are arranged in a fixed relationship to one another, and in which the spring arrangement is arranged in the outer magnetic circuit part. The magnetic circuit system includes an inner magnetic circuit portion disposed radially within the voice coil device. The spring device couples the inner magnetic circuit portion to the outer magnetic circuit portion and allows relative movement between the inner magnetic circuit portion and the outer magnetic circuit portion in an offset direction parallel to the voice coil axis, where the magnetic force and the spring force are opposite. Further, an output device is disclosed comprising a sound emitting structure and such an electrodynamic actuator connected thereto.

An apparatus includes at least one actuator configured to generate vibrations over a range of vibration frequencies. The at least one actuator includes a housing configured to be positioned on or within a recipient's body. The actuator further includes a support portion configured to be in operative communication with a fixture implanted within the recipient's body. The actuator further includes an oscillator within the housing, the oscillator includes piezoelectric material and has a first portion in mechanical communication with the support portion and a second portion spaced from the support portion. The piezoelectric material is configured to undergo bending oscillations in response to received electric voltage signals in which the second portion moves relative to the first portion. The actuator further includes at least one damper configured to damp at least one vibrational resonance of the at least one actuator over at least a portion of the range of vibration frequencies and independently of spring damping by the piezoelectric material.

The invention relates to an electric driver for a loudspeaker or acoustic transducer with improved damping. An electric driver for a plate-like structure or diaphragm is disclosed, the electric driver comprising a voice coil, a magnetic circuit system and a plurality of arms movably coupling the voice coil and the magnetic circuit system. The arms are made of a metal having a fatigue strength of at least 370 N / mm 2 or an ultimate tensile strength of at least 1100 N / mm 2 . Each of the arms comprises at least two arm sections arranged to be movable relative to each other and connected to each other by a damping material having a tensile storage modulus of 0.1 MPa - 6000 MPa and a tensile loss factor of at least 0.1, both measured at room temperature of 20°C. Furthermore, the invention relates to a loudspeaker and electric transducer having such an electric driver and to a method of manufacturing an intermediate product for such an electric driver.

A display device (2) includes: a display panel (8) that displays an image on a front surface (8a) of the display panel (8); a rear cover (10) that includes a front surface (10a) facing a back surface (8b) of the display panel (8); and an audio output unit (12) that outputs audio by causing the rear cover (10) to vibrate. The audio output unit (12) is provided spaced apart from the back surface (8b) of the display panel (8) and supported on a back surface (10b) of the rear cover (10).

A panel audio loudspeaker includes a panel and an actuator attached to a surface of the panel and configured to cause vibration of the panel. The actuator comprises a magnetic coil in thermal communication with the panel. The panel audio loudspeaker further comprises a plurality of electrical sensors electrically coupled to the magnetic coil and configured to output time-varying electrical data for the magnetic coil, and an electronic control module in communication with the magnetic coil and the electrical sensors. The electronic control module is configured to perform operations comprising: providing a current to the magnetic coil; receiving the time-varying electrical data for the magnetic coil; determining an electrical energy provided to the magnetic coil between a first time and a second time; accessing a thermal model of the panel; and determining a change in a panel temperature between the first time and the second time.

To provide a vibration device that improves reliability and sound pressure characteristics, and a device including the same.SOLUTION: A vibration device includes a vibration generator 10 including a piezoelectric material in a vibration structure 11, and a sensor unit 30 configured as the vibration generator, and is capable of correcting or compensating for changes in the electrical characteristics of the vibration generator, and capable of correcting or compensating for the vibration characteristics of the vibration generator.SELECTED DRAWING: Figure 1

The glass diaphragm module includes: a glass diaphragm including a glass plate structure and an exciter that is attached to the glass plate structure; a first member that is attached to a peripheral end portion of the glass diaphragm via a resin layer; and a second member that is arranged away from the glass diaphragm and that is connected to the first member, and a Young's modulus E1 of the first member and a Young's modulus E2 of the second member satisfy E2 / E1≥10.

The present application provides a sound production apparatus and an electronic device. The sound production apparatus comprises a first transducer and a second transducer; the first transducer comprises a first base and a first vibration assembly; the outer circumference of the first vibration assembly is fixed to the first base; the second transducer comprises a second base and a second vibration assembly; the second vibration assembly is fixed to the second base; and the second vibration assembly and the first vibration assembly are opposite to and spaced apart from each other. The middle portion of the first vibration assembly and the second transducer define a vibration space; the outer circumference of the second vibration assembly and the outer circumference of the first vibration assembly define an acoustic channel; and the vibration space is communicated with an external space through the acoustic channel. The sound production apparatus has a simple structure and a small size.

To provide a panel speaker for improving sound quality of audio to be output.SOLUTION: A panel speaker includes: a first panel (display panel 110); a second panel (transmission panel); a vibration actuator 150 for vibrating the first panel and the second panel; adhesive layers (first adhesive layers 120) for joining one surface of the first panel with one surface of the second panel; and a coupling part (second adhesive layer 140) for joining the other surface of the second panel with the vibration actuator. The adhesive layers include a plurality of belt-shaped areas parallel in one direction. The coupling part is arranged in an area sandwiched between the belt-shaped areas in a plane view.SELECTED DRAWING: Figure 5

Provided in the embodiments of the present disclosure is an assembled screen unit, including a display panel, a frame, a sound-production stimulation unit, and a supporting structure; the supporting structure is configured to support the sound-production stimulation unit; the back side of the display panel includes a central region and an edge region; the sound-production stimulation unit is in contact with the central region; the frame is configured to support the display panel; the frame includes a first sub-portion and a second sub-portion; and a first vibration isolation portion is provided between the first sub-portion and the display panel; a second vibration isolation portion is provided between the second sub-portion and the display panel; and the first vibration isolation portion has a thickness less than the second vibration isolation portion.

To provide an apparatus capable of improving sound quality.SOLUTION: An apparatus includes a vibration member, a supporting member at a rear surface of the vibration member, and a sound generating apparatus at a rear surface of the supporting member. The sound generating apparatus is configured to output a first sound in a first direction and to output a second sound in a second direction different from the first direction.SELECTED DRAWING: Figure 1