CN114173262B - Ultrasonic sound generator, display and electronic equipment - Google Patents
Ultrasonic sound generator, display and electronic equipment Download PDFInfo
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- CN114173262B CN114173262B CN202111371449.5A CN202111371449A CN114173262B CN 114173262 B CN114173262 B CN 114173262B CN 202111371449 A CN202111371449 A CN 202111371449A CN 114173262 B CN114173262 B CN 114173262B
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- 239000010959 steel Substances 0.000 claims abstract description 81
- 230000005236 sound signal Effects 0.000 claims description 9
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- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F27/00—Combined visual and audible advertising or displaying, e.g. for public address
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
Abstract
The invention discloses an ultrasonic sound generator, a display and electronic equipment, wherein the ultrasonic sound generator comprises a vibrator and a sound generator driver, the sound generator driver comprises a conductive circuit and a magnetic circuit unit, the magnetic circuit unit comprises a plurality of magnetic steels which are distributed at intervals according to a certain distance and are distributed in a plurality of rows, the magnetic poles of the two corresponding ends of two adjacent magnetic steels are opposite, the conductive circuit is attached to the vibrator, a vibration space is arranged between the vibrator and the magnetic circuit unit, the conductive circuit is wired in a gap formed between the magnetic steels, and after an ultrasonic signal modulated by audio frequency is loaded on the conductive circuit in the gap, the conductive circuit drives the sound generator driver to vibrate perpendicular to a plane where the vibrator is located, so that the vibrator is driven to vibrate and sound. The invention adjusts the wiring structure of the conductive circuit, the gap between the magnetic steels, the driving frequency and the like, so that the screen sounding is realized, the directivity is high, and the split vibration is reduced.
Description
Technical Field
The invention relates to the technical field of ultrasonic sound production, in particular to an ultrasonic sound generator, a display and electronic equipment.
Background
With the development of the portable consumer electronic product market, screen sounders have come into the sight of more and more people, such as mobile phones, computers, televisions, photo frames, multimedia players, and the like, due to the larger screen occupation ratio.
The traditional screen sounding is that a vibrator is used for directly driving the whole screen of the electronic equipment, and then the screen vibration is used for realizing the sounding effect. However, this approach necessarily has a high amplitude, which requires high reliability for the entire screen sounder, and is prone to failure such as breakage or peeling. The present invention therefore proposes a new solution to this problem.
Disclosure of Invention
The invention aims to provide an ultrasonic sound generator, a display and electronic equipment, which realize screen sound generation, reduce split vibration and improve the use reliability of the ultrasonic sound generator while having high directivity by adjusting the size of a wiring structure of a conductive circuit, the gap between magnetic steels, the driving frequency and the like.
To achieve the above object, in one aspect, the present invention provides an ultrasonic sound generator, comprising:
a vibrator having opposite first and second faces;
the sound production driver comprises a conductive circuit and a magnetic circuit unit, wherein the magnetic circuit unit comprises a plurality of magnetic steels which are distributed at intervals according to a certain distance and are distributed in a plurality of rows, the magnetic poles at the two corresponding ends of two adjacent magnetic steels are opposite, the conductive circuit is attached to the second face of the vibrator, a vibration space is arranged between the vibrator and the magnetic circuit unit, the conductive circuit is arranged in a gap formed between the magnetic steels, and the conductive circuit is arranged in the gap in a wiring mode, so that the conductive circuit drives the sound production driver to generate vibration perpendicular to the plane where the vibrator is located after being loaded with an ultrasonic signal modulated by audio frequency, so that the vibrator is driven to vibrate and sound, and the gap is 0.5 mm-10 mm.
In a preferred embodiment, the magnetic circuit unit further includes a plurality of magnetic conductive sheets, the magnetic conductive sheets are disposed at positions corresponding to the positions of the magnetic steels, and each magnetic conductive sheet is disposed on a top surface of each corresponding magnetic steel, which is close to the vibrator.
In a preferred embodiment, the conductive traces are disposed on a flexible circuit board.
In a preferred embodiment, the conductive tracks are parallel or perpendicular to the direction of the magnetic field in the gap.
In a preferred embodiment, the current direction and the magnetic field direction in the gap are parallel to the direction in which the surface of the vibrator extends, the current direction is perpendicular to the magnetic field direction, and the directions of the forces applied by the conductive lines in different gaps are the same or substantially the same.
In a preferred embodiment, the traces of the conductive lines are in an arcuate or S-shaped or serpentine distribution.
In a preferred embodiment, the mechanical resonance frequency of the vibrator is the same as or close to the frequency of the ultrasonic signal applied.
In a preferred embodiment, the frequency of the ultrasonic signal is 20 khz-200 khz or more.
In a preferred embodiment, the ultrasonic sound generator further comprises a signal generator connected to the sound generator driver, the signal generator comprising:
the carrier signal sounding unit is used for sounding an ultrasonic carrier signal;
the modulating unit is connected with the carrier signal sounding unit and is used for receiving the ultrasonic carrier signal and the audio signal, and carrying out amplitude modulation on the ultrasonic carrier signal and the audio signal to generate an ultrasonic modulating signal;
and the signal adjusting unit is used for adjusting the ultrasonic wave modulation signal and sending out the ultrasonic wave signal modulated with the audio signal.
In a preferred embodiment, the magnetic conducting sheet and the magnetic steel are fixed through adhesive bonding.
In a preferred embodiment, the parameters of the ultrasonic signals loaded on the conductive lines are the same or different or partially the same, the parameters include signal strength and sending time, and the direction of the sound waves sent by the sound-producing driver is adjustable or not adjustable by adjusting the parameters of the ultrasonic signals.
In another aspect, the present invention provides a display comprising the above ultrasonic sound generator.
In a preferred embodiment, the vibrator is a screen.
In a preferred embodiment, the screen is an LCD screen or an OLED screen, and the material of the LCD screen or the OLED screen is glass or plastic.
In a preferred embodiment, the thickness of the screen is 0.01 mm-10 mm, and the amplitude is 1 um-20 um.
In yet another aspect, the present invention provides an electronic device comprising the above-described ultrasonic sound generator, or comprising the above-described display.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through adjusting the wiring structure of the conductive circuit, the size of the gap between the magnetic steels, the frequency of the ultrasonic signals and the like, the sound distortion caused by the split vibration is avoided, the vibration amplitude of the whole sound generator can be reduced, the reliability of the whole sound generator is improved, and the sound generator is not easy to break or peel.
2. According to the invention, the ultrasonic signal with the frequency of more than 20kHz is loaded to carry out vibration sounding, and the ultrasonic directivity is obviously superior to audible sound, so that the sound directivity of the sounder is improved.
Drawings
FIG. 1 is a schematic diagram showing a split structure of an ultrasonic sound generator according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the cross-sectional structure of FIG. 1 (conductive lines of the sound emitting driver are parallel to the direction of the magnetic field in the gap);
FIG. 3 is a schematic diagram showing a split structure of an ultrasonic sound generator according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of the cross-sectional structure of FIG. 3 (conductive traces of the sound emitting driver are perpendicular to the direction of the magnetic field in the gap);
FIG. 5 is a schematic structural diagram of a magnetic steel according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a conductive circuit in a gap between magnetic steels according to an embodiment of the present invention;
fig. 7 is a schematic block diagram of an ultrasonic sound generator according to an embodiment of the present invention.
The reference numerals are: 1. the vibration body, 11, the first surface, 12, the second surface, 2, the sound producing driver, 21, the conductive circuit, 22, the magnetic circuit unit, 221, the magnetic steel, 222, the gap, 223, the magnetic conductive sheet, 23, the flexible circuit board, 24, the vibration space, 3, the signal generator, 31, the carrier signal sound producing unit, 32, the modulating unit, 33, the signal adjusting unit, 331, the signal amplifying unit, 332, the power amplifying unit, 333, the filter, 334 and the matching circuit.
Detailed Description
The following detailed description of specific embodiments of the invention is, but it should be understood that the invention is not limited to specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As shown in fig. 1 to 7, the ultrasonic sound generator of the present invention includes a vibrator 1 and a sound generator driver 2, the sound generator driver 2 drives the vibrator 1 to vibrate by loading an ultrasonic signal, and the ultrasonic signal self-demodulates in air to generate an audible sound, thereby realizing directional sound generation of the vibrator 1. Since the directivity of the ultrasonic signal is remarkably due to audible sound, the directivity of the sound emitted from the vibrator 1 can be improved.
The vibrator 1 has a first surface 11 and a second surface 12 opposite to each other, and when implemented, the vibrator 1 may be a screen, such as an LCD screen or an OLED screen, and the material may be glass, plastic, or the like. The invention does not limit the shape, size, dimension and the like of the vibrator 1, and screens with different thicknesses and different materials have different mechanical resonance frequencies. Preferably, the vibrator 1 is generally formed in a rectangular parallelepiped shape, preferably having a thickness of 0.01mm to 10mm, and a vibration amplitude of preferably 1um to 20 um. In other alternative embodiments, the vibrator 1 may not be provided.
The sound-producing driver 2 is arranged on the second surface 12 of the vibrator 1, and the sound-producing driver 2 generates vibration perpendicular to the direction of the vibrator 1 by loading ultrasonic signals on the sound-producing driver 2, so as to drive the vibrator to vibrate and produce sound. Specifically, the sound-producing driver 2 includes a conductive line 21 and a magnetic circuit unit 22, wherein the magnetic circuit unit 22 includes a plurality of magnetic steels 221, and the plurality of magnetic steels 221 are distributed at intervals and in a plurality of rows. Specifically, in each row, a gap 222 is disposed between two adjacent magnetic steels 221, a gap 222 is also disposed between two adjacent magnetic steels 221 in two adjacent rows, and positions of two adjacent magnetic steels 221 in two adjacent rows are corresponding or staggered. All the gaps 222 may be all the same or all different or partially the same, preferably all the same, and the positions of the two adjacent magnetic steels 221 in two adjacent rows are preferably staggered, so that the routing length of the conductive circuit 21 is relatively longer in the magnetic circuit unit 22 with the same size compared with the structure in which the positions of the two adjacent magnetic steels 221 in two adjacent rows are correspondingly arranged, and the generated electromagnetic force is larger.
In this embodiment, as shown in fig. 5, each magnetic steel 221 has a flat cuboid shape, and is magnetized in the Z direction, that is, the upper end and the lower end of each magnetic steel 221 have two magnetic poles with opposite magnetism, the upper end is defined as the end close to the vibrator 1, the lower end is defined as the end far away from the vibrator 1, the upper end is the N pole, and the lower end is the S pole. And the magnetic poles at the two corresponding ends of two adjacent magnetic steels 221 are opposite, if the upper end of one magnetic steel 221 is an N pole, the lower end is an S pole, the upper end of the other magnetic steel 221 is an S pole, and the lower end is an N pole.
In practice, the size of the gap between the magnetic steels 221 can be adjusted according to practical needs, and the range of the gap is preferably 0.5 mm-10 mm.
Preferably, the magnetic circuit unit 22 further includes a plurality of magnetic conductive pieces 223, the positions of the magnetic conductive pieces 223 are correspondingly set to the positions of the magnetic steels 221, that is, each magnetic conductive piece 223 corresponds to one magnetic steel 221, specifically, the size of each magnetic conductive piece 223 is the same as the corresponding magnetic steel 221, the thickness can be adjusted and set according to actual needs, and the gap 222 between two adjacent magnetic conductive pieces 223 is the same as the gap 222 between the magnetic steels 221. In this embodiment, the magnetic conductive sheet 223 is disposed on the upper end surface of the magnetic steel 221, and the magnetic conductive sheet 223 and the corresponding magnetic steel 221 can be bonded by glue to enhance the magnetic field strength of the upper end of the magnetic steel 221, and in other embodiments, the magnetic conductive sheets 223 may be disposed on the upper and lower end surfaces of the magnetic steel 221, so that the magnetic field strength of the upper and lower ends of the magnetic steel 221 is enhanced.
A vibration space 24 is formed between the magnetic circuit unit 22 and the vibrator 1, and the vibration space 24 is used to provide a space required for the vibrator 1 to vibrate. The conductive circuit 21 is disposed between the magnetic circuit unit 22 and the vibrator 1, and specifically, the conductive circuit 21 may be directly attached to the second surface 12 of the vibrator 1, in this embodiment, the conductive circuit 21 is carried on a flexible circuit board 23, and the flexible circuit board 23 is attached to the second surface 12 of the vibrator 1. Since the vibration space 24 exists between the magnetic circuit unit 22 and the vibrator 1 and the flexible circuit board 23 is attached to the vibrator 1, the flexible circuit board 23 is suspended from the magnetic circuit unit 22.
In addition, the conductive circuit 21 is routed from the gap 222 formed between the magnetic steels 221, and the routing mode in the gap 222 makes the conductive circuit 21 generate a force perpendicular to the vertical direction of the plane of the vibrator 1 under the action of the magnetic field in the gap 222 after the ultrasonic signal modulated by audio is loaded, so as to drive the vibrator 1 to vibrate in the vertical direction, and further drive the vibrator 1 to vibrate and sound.
The invention does not limit the wiring way of the conductive circuit 21 in the gap 222 between the magnetic steels 221, so long as the direction of the stress of the vibrator 1 is consistent or nearly consistent. In this embodiment, the traces of the conductive traces 21 are distributed in an arcuate or S-shaped or serpentine shape. Specifically, taking fig. 6 as an example, 6 pieces of magnetic steel are defined as magnetic steel a-magnetic steel f in the drawing, wherein magnetic steel a and magnetic steel b are located in a first row, the upper end of magnetic steel a is an S pole, the upper end of magnetic steel b is an N pole, magnetic steel c and magnetic steel d are located in a second row, the upper end of magnetic steel c is an S pole opposite to the N pole at the upper end of magnetic steel b, the upper end of magnetic steel d is an N pole opposite to the S pole at the upper end of magnetic steel c, magnetic steel e and magnetic steel f are located in a third row, the upper end of magnetic steel e is an N pole opposite to the S pole at the upper end of magnetic steel c, and the upper end of magnetic steel f is an S pole opposite to the N pole at the upper end of magnetic steel e. The direction of the magnetic field between the magnetic steel a and the magnetic steel b is the direction from the N pole at the upper end of the magnetic steel b to the S pole at the upper end of the magnetic steel a, the direction of the current on the conductive line 21 running from the gap between the magnetic steel a and the magnetic steel b is the direction indicated by an arrow, the force born by the conductive line 21 in the gap 222 is the force vertical to the direction of the vibration body 1, and so on, the force born by the conductive line 21 in the gap 222 between the magnetic steel b and the magnetic steel c, the force born by the conductive line 21 in the gap 222 between the magnetic steel c and the magnetic steel d, and the force born by the conductive line 21 in the gap 222 between the magnetic steel e and the magnetic steel f are the force vertical to the direction of the vibration body 1, otherwise, when the direction of the current on the conductive line 21 is changed to the opposite direction, the force born by the conductive line 21 in the gap 222 between the magnetic steels a to the magnetic steel f is the direction vertical to the direction of the vibration body 1. Therefore, the vibrator 1 can be driven to vibrate in the up-down direction to produce sound.
Preferably, the conductive line 21 is parallel or perpendicular to the direction of the magnetic field in the gap 222, i.e. parallel to the direction of the plane of the vibrator 1, and perpendicular to the direction of the plane of the vibrator 1. When the direction of the magnetic field in the gap 222 is perpendicular to the direction of the magnetic field in the gap 222, the magnetic induction lines passing through the conductive line 21 in the gap 222 are more, and the magnetic field strength is stronger than the direction of the magnetic field in the gap 222 parallel to the conductive line 21. And the conductive line 21 is not limited to one turn, but may be multiple turns.
Preferably, when the mechanical resonance frequency of the vibrator 1 in the present invention is close to the frequency of the ultrasonic signal to be applied, a larger audible sound can be emitted. The mechanical resonance frequency of the vibrator 1 is related to the thickness of the vibrator 1, the material, the arrangement of the magnetic circuit units 22, the size of the gaps between the magnetic circuit units 22, the wiring pattern of the conductive lines 21, the driving frequency (i.e. the frequency of the ultrasonic signal), etc., while the vibrator 1 with different thickness and material has different mechanical resonance frequencies, so the arrangement of the corresponding magnetic circuit units 22, the gaps between the magnetic circuit units 22, the wiring pattern of the conductive lines 21, and the driving frequency need to be adjusted accordingly, so that the ultrasonic sounder obtains the maximum sound efficiency. If the first-order resonance mode of the ultrasonic generator is set near 37kHz by adjusting the interval between the magnetic circuit units 22, at this time, if the ultrasonic signal frequency is 37kHz, a larger amplitude of the ultrasonic generator can be excited.
Preferably, the parameters of the ultrasonic signals loaded on the conductive line 21 are the same or different or partially the same, the parameters include signal strength and sending time, and the direction of the sound wave sent by the sound producing driver 2 is adjustable or not adjustable by adjusting the parameters of the ultrasonic signals loaded on the conductive line 21. Specifically, if different phase differences or delay time differences are adopted to excite different parts of the conductive circuit 21 of the sounding driver 2, the deflection of the sound beam of the sounding driver 2 is realized according to the sound wave superposition principle, so that the direction of the sound wave emitted by the sounding driver 2 is adjustable. For another example, when the parameters of the ultrasonic signals loaded on the conductive line 21 are the same, the sound waves emitted from the sound emitting driver 2 are transmitted in a fixed direction.
Referring to fig. 7, the ultrasonic sound generator of the present invention further includes a signal generator 3 connected to the sound generator 2, for sending an ultrasonic signal to the sound generator 2, driving the sound generator 2 to vibrate, and driving the vibrator 1 to vibrate while the sound generator 2 vibrates, so as to realize vibration sound generation of the vibrator 1. In practice, the signal generator 4 preferably comprises a carrier signal sounding unit 31, a modulation unit 32 and a signal adjustment unit 33, wherein the carrier signal sounding unit 31 is used for sounding an ultrasonic carrier signal, and the signal frequency can be from 20kHz to 200kHz. In practice, the carrier signal sounding unit 31 may employ an MCU (Microcontroller Unit, micro control unit), a special DSP (Digital Signal Processing ) and other devices or circuits capable of achieving this function. The modulation unit 32 is connected to the carrier signal sounding unit 31, and is configured to receive the ultrasonic carrier signal and the audio signal, and perform amplitude modulation on the ultrasonic carrier signal and the audio signal to generate an ultrasonic modulated signal. In practice, the modulation scheme may employ AM (amplitude modulation) modulation, and the modulation algorithm may include, but is not limited to: double sideband modulation, single sideband modulation, approximate square root modulation, square root truncated double sideband modulation, wherein the single sideband modulation method can improve system efficiency, and the modulation method can be used but is not limited to: filtering, phase shifting filtering, etc. The signal adjusting unit 33 is used for adjusting the ultrasonic modulation signal and sending out the ultrasonic signal modulated with the audio signal. Specifically, the signal adjustment unit 33 may include a signal amplification unit 331, a power amplification unit 332, a filter 333, and a matching circuit 334, where the signal amplification unit 331 is connected to the modulation unit 32, and is configured to amplify the amplitude of the modulated ultrasonic modulation signal, so as to increase the amplitude of the ultrasonic modulation signal. In practice, the signal amplifying unit 331 may use a proportional amplifier or other circuits or devices that can realize the same function. The power amplifying unit 332 is connected to the signal amplifying unit 331, and is used for amplifying the power of the ultrasonic modulated signal, and when in implementation, the power amplifying unit 332 may use an H-bridge or half-bridge circuit formed by an integrated power amplifying chip or a separate component, and other circuits or devices capable of implementing power amplification. The filter 333 is connected to the power amplifying unit 332, and is used for filtering the ultrasonic modulated signal, and when implemented, the filter 333 may be an elliptic filter, a chebyshev filter, a butterworth filter or other circuits capable of implementing a low-pass filtering function. The matching circuit 334 is connected to the filter 333 for adjusting the voltage required by the output sound driver 2 according to the load. In practice, the matching circuit 334 may be implemented using, but is not limited to, a series inductor, a parallel inductor, an LC or an LC series capacitor.
The present invention proposes a display comprising an ultrasonic sound generator as described above, which can be part of a display screen. When the ultrasonic sound generator is used as a part of the display, the vibration body may be a screen, the type of the screen is not limited, and for example, the ultrasonic sound generator may be an LCD display, an OLED display, or the like, and the material may be glass, plastic, or the like.
The invention proposes an electronic device comprising an ultrasonic sound generator as described above or a display as described above. The electronic device may be, but is not limited to, a display device such as a computer, a cell phone, a television, etc.
The invention has the advantages that 1, the invention avoids the sound distortion caused by the split vibration by adjusting the wiring structure of the conductive circuit, the gap size between the magnetic steels, the frequency of the ultrasonic signals and the like, can reduce the vibration amplitude of the whole sounder, improves the reliability of the whole sounder and is not easy to break or peel. 2. According to the invention, the ultrasonic signal with the frequency of more than 20kHz is loaded to carry out vibration sounding, and the ultrasonic directivity is obviously superior to audible sound, so that the sound directivity of the sounder is improved.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. An ultrasonic sound generator, comprising:
the vibrator is provided with a first surface and a second surface which are opposite, the thickness of the vibrator is 0.01 mm-10 mm, and the vibration amplitude is 1 um-20 um;
the sound production driver comprises a conductive circuit and a magnetic circuit unit, wherein the magnetic circuit unit comprises a plurality of magnetic steels which are distributed at intervals according to a certain distance and are distributed in a plurality of rows, a gap is formed between every two adjacent magnetic steels, the gap is also formed between every two adjacent magnetic steels in every two adjacent rows, the positions of the two adjacent magnetic steels in every two adjacent rows are staggered, the magnetic poles at the two corresponding ends of the two adjacent magnetic steels are opposite, the conductive circuit is borne on a flexible circuit board, the flexible circuit board is attached to the second face of the vibrator, a vibration space is formed between the vibrator and the magnetic circuit unit, the conductive circuit is distributed in an arc shape or S shape or in a serpentine shape from the gap formed between the magnetic steels, and the conductive circuit is driven to vibrate in a plane where the vibrator is located after an ultrasonic signal modulated by audio frequency is loaded in the conductive circuit, so that the vibrator is driven to vibrate and sound, the range of the gap is 0.5 mm-10 mm, the mechanical frequency of the vibrator is the same as the frequency of the loaded signal, and the direction of the vibration magnetic field is the same as the direction of the current in the direction of the vibration signal, and the direction of the vibration signal is different from the direction of the current in which is perpendicular to the direction of the vibration signal.
2. The ultrasonic sound generator of claim 1, wherein the magnetic circuit unit further comprises a plurality of magnetic conductive sheets, the magnetic conductive sheets are disposed at positions corresponding to the positions of the magnetic steels, and each magnetic conductive sheet is disposed on a top surface of each corresponding magnetic steel close to the vibrator.
3. The ultrasonic sound generator of claim 1, wherein the conductive trace is parallel or perpendicular to the direction of the magnetic field within the gap.
4. The ultrasonic applicator of claim 1, wherein the ultrasonic signal has a frequency of 20khz to 200khz.
5. The ultrasonic sound generator of claim 1, further comprising a signal generator coupled to the sound generator driver, the signal generator comprising:
the carrier signal sounding unit is used for sounding an ultrasonic carrier signal;
the modulating unit is connected with the carrier signal sounding unit and is used for receiving the ultrasonic carrier signal and the audio signal, and carrying out amplitude modulation on the ultrasonic carrier signal and the audio signal to generate an ultrasonic modulating signal;
and the signal adjusting unit is used for adjusting the ultrasonic wave modulation signal and sending out the ultrasonic wave signal modulated with the audio signal.
6. The ultrasonic sound generator of claim 1 wherein the parameters of the ultrasonic signals loaded on the conductive lines are the same or different or partially the same, the parameters include signal strength and transmission time, and the direction of the sound waves emitted by the sound generator driver is adjustable or not adjustable by adjusting the parameters of the ultrasonic signals.
7. A display comprising an ultrasonic sound generator as claimed in any one of claims 1 to 6.
8. The display of claim 7, wherein the vibrator is a screen.
9. The display of claim 8, wherein the screen is an LCD screen or an OLED screen, and the LCD screen or the OLED screen is made of glass or plastic.
10. An electronic device comprising an ultrasonic sound generator according to any one of claims 1 to 6 or a display according to any one of claims 7 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111371449.5A CN114173262B (en) | 2021-11-18 | 2021-11-18 | Ultrasonic sound generator, display and electronic equipment |
| PCT/CN2021/131812 WO2023087258A1 (en) | 2021-11-18 | 2021-11-19 | Ultrasonic sound generator, display, and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111371449.5A CN114173262B (en) | 2021-11-18 | 2021-11-18 | Ultrasonic sound generator, display and electronic equipment |
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| Publication Number | Publication Date |
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| CN114173262A CN114173262A (en) | 2022-03-11 |
| CN114173262B true CN114173262B (en) | 2024-02-27 |
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| Publication number | Publication date |
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| CN114173262A (en) | 2022-03-11 |
| WO2023087258A1 (en) | 2023-05-25 |
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