304results 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).

Sufficient sound pressure is obtained in the mid-low range, to provide a SoT module 100 which can be applied to a variety of applications. A SoT module 100 comprises a plate-shaped piezoelectric composite 105 for generating bending vibration by the impression of an AC voltage, a plurality of elastic bodies, one ends of which are bonded to the main surface of the piezoelectric composite 105, the elastic bodies 120a and 120b transmitting vibration of the piezoelectric composite 105 and a vibration plate 130 has a main surface which is bonded to the other ends of the elastic bodies 120a and 120b, wherein the piezoelectric composite 105 comprises piezoelectric elements 110a, 110b formed in a rectangular plate, and there is a position of the centroid of the piezoelectric composite 105 between the plurality of elastic bodies 120a and 120b.

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.

The invention provides an electronic device, comprising: a display screen comprising a first area and a second area; the shell comprises a first panel, and the first panel and the first area of the display screen are oppositely arranged in the second direction; a first space is formed between the first area and the first panel, and the first panel is provided with one or more through holes communicated with the first space; the sealing assembly is arranged between the display screen and the first panel and used for sealing the first space in the circumferential direction of the first area; and the piezoelectric ceramic component is arranged in the second area of the display screen. Wherein the sealing assembly comprises a first sealing piece and a second sealing piece, the first sealing piece is used for fixedly connecting the first panel and the display screen, and the second sealing piece is used for elastically connecting the first panel and the display screen; the first sealing piece is at least arranged on the side edge of the first area away from the second area, and the second sealing piece is at least arranged on the side edge of the first area close to the second area. The method and the device have a good display screen sound production effect and can also protect user privacy.

Laminated glass speaker systems include at least one pair of asymmetrical piezoelectric exciters within a laminating material used to effectively bond glass panels together. The laminated glass speaker system can be utilized about the vehicle anywhere sound generation is desired, e.g., passenger windows, fixed or sliding roofing systems, front windshield, rear windshield, side windows, rear quarter glasses, and the like. The piezoelectric exciters are generally off-axis relative to a centerline longitudinally extending between the glass panels and act as a diaphragm to produce sound upon vibration.

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.

The present specification relates to an energy conversion device, a speaker, and an audio output device, the energy conversion device including a magnetic circuit system including a magnet assembly and a magnetic flux conducting cover installed to at least partially surround the magnet assembly, and a vibration transmission sheet including a first vibration transmission sheet and a second vibration transmission sheet distributed respectively on both sides of the magnet assembly along the vibration direction of the magnet assembly and elastically supporting the magnet assembly within the magnetic flux conducting cover, the energy conversion device having a resonant peak frequency of less than 300 Hz.

A panel speaker includes: a first panel; a second panel; a vibration actuator configured to vibrate the first panel and the second panel; an adhesive layer configured to adhere one surface of the first panel to one surface of the second panel; and a coupling portion configured to couple other surface of the second panel with the vibration actuator, the adhesive layer includes a plurality of strip-shaped regions parallel to one direction in a plan view of the second panel, and the coupling portion is disposed at a region sandwiched between adjacent two of the plurality of strip-shaped regions in the plan view of the second panel.

------ Enclosure configured to generate sound with low spatial decay and no resonance effect in a reverberant medium The invention relates to an enclosure (1), comprising: a front face (2); a rear face (3); an enclosure (4) connecting the front face (2) to the rear face (3); at least one electromagnetic actuator (6) mechanically connected to the front face (2) and configured to generate vibrations in the front face (2) from a control signal; at least one solid core (7), extending between the front face (2) and the rear face (3), such that the core or each core (7) transmits vibrations between the front face (2) and the rear face (3); and control electronics configured to deliver control signals to the electromagnetic actuator (6) or to each electromagnetic actuator (6) so as to generate a sound by vibrating the front face (2), at least one core (7), the casing (4) and the rear face (3).Figure to be published: Figure 4.

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.

The flat loudspeaker including an enclosure in the form of a support frame, a sound-emitting rectangular membrane attached to the frame, and an electrodynamic vibration exciter located opposite the membrane. Besides, the vibration exciter is attached with one of its ends to the membrane within a special line passing along the plane of the rectangular membrane, emerging from any vertex of the rectangular membrane, and ending at a point on the opposite vertex of the membrane's horizontal side located at a distance of 2 / 3 of the membrane's opposite side from the top horizontally.

A sound output device includes a member to be vibrated that outputs sound to a space, a vibration mechanism that vibrates the member to be vibrated, and a transmission member that transmits vibration of the vibration mechanism to the member to be vibrated, in which the vibration mechanism includes an actuator that generates the vibration along a predetermined vibration axis, and an abutment member that is provided near the transmission member in an axial direction of the vibration axis of the actuator to transmit the vibration generated by the actuator to the transmission member, and the transmission member includes a first end portion that makes contact with the abutment member, and a second end portion that makes contact with the member to be vibrated.

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.

Acoustic transducer comprises an upper part (301) and a lower part (302), with a first permanent magnet (303) in the upper part (301) and a second permanent magnet (304) in the lower part (302). Similarly named magnetic poles of the first and second permanent magnets (303, 304) face each other. An upper cover (306) in the upper part (301) and a lower cover (307) in the lower part (302) comprise magnetic material and define an enclosure around the magnets (303, 304). A coil (308) creates, under influence of an electric current, dynamic magnetic forces. A separating gap (309) between edges of said upper cover (306) and lower cover (307) is directed so that it allows a relative movement of the edges of said lower cover (307) and said upper cover (306) between different positions, said positions differing in the extent to which edges coincide.