CN106714055B - Back pole plate multichannel electrostatic transducer - Google Patents
Back pole plate multichannel electrostatic transducer Download PDFInfo
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- CN106714055B CN106714055B CN201611267453.6A CN201611267453A CN106714055B CN 106714055 B CN106714055 B CN 106714055B CN 201611267453 A CN201611267453 A CN 201611267453A CN 106714055 B CN106714055 B CN 106714055B
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- layer
- insulating layer
- electrode plate
- flexible insulating
- pole plate
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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
- H04R19/00—Electrostatic transducers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The invention discloses a kind of back pole plate multichannel electrostatic transducers, including first layer, are insulating layer, and the first layer surface, which is spaced apart, is equipped at least two channels；Back electrode plate, setting is in the channel；And the second layer comprising the flexible conductive layer that flexible insulating layer on the first layer is set and is arranged on flexible insulating layer；Wherein, first layer and flexible insulating layer are the separated layers of main body, and flexible insulating layer is combined together along a succession of contact portion separated on the first layer with first layer.The present invention is provided with the electrode plate of multichannel on back pole plate, the vibrating membrane Independent Vibration of each electrode plate upper end, it can load audio or ultrasonic signal, amplitude and phase by adjusting different interchannels control acoustic irradiation direction, so that energy converter has directive property, it can be achieved that tracking of the sound wave to dynamic object, to be satisfied with high-end place use demand, and side lobe effect can be eliminated, sound quality is improved, noise and loss are reduced.
Description
Technical field
The present invention relates to transducer technology fields, it is more particularly related to which a kind of back pole plate multichannel is electrostatic
Energy converter.
Background technique
Traditional electrostatic transducer includes that the conductive film that capacitor is formed between conductive backings is arranged in, and Dc bias is made
For the film, and AC signal voltage acts on conductive backings.It is applied to the voltage that hundreds if not thousands of are lied prostrate in conductive backings, it should
Voltage is applied to the power on electrically charged film, the mobile air to driving in its two sides of the electrically charged film.
But existing electrostatic transducer, if the patent No. is 201280035607.2, patent name is electrostatic transducer,
The sound wave direction that the energy converter issues is uncontrollable, and sound wave is without directivity, is unable to satisfy in the demand in high-end place.
Summary of the invention
It is an object of the invention to solve at least the above problems, and provide the advantages of at least will be described later.
It is a still further object of the present invention to provide a kind of back pole plate multichannel electrostatic transducers, are provided on back pole plate
The electrode plate of multichannel, the vibrating membrane Independent Vibration of each electrode plate upper end, and the voltage signal on each electrode plate independently drives
It is dynamic, the electric field between each electrode plate and the upper end vibrating membrane is controlled, each electrode plate upper end vibrating membrane Oscillation Amplitude is realized
The phase of each channel sound wave is controlled to control the radiative acoustic wave of each electrode plate upper end vibrating membrane with the Independent adjustable of phase
The radiation direction of the i.e. controllable energy converter transmitting sound wave in position, to realize the control in energy converter transmitting sound wave direction.
In order to realize these purposes and other advantages according to the present invention, provide that a kind of back pole plate multichannel is electrostatic to be changed
Energy device, comprising:
First layer is insulating layer, and first layer surface, which is spaced apart, is equipped at least two channels；
Back electrode plate, setting is in the channel；And
The second layer, can load audio or ultrasonic signal, and the second layer includes the flexibility of setting on the first layer
Insulating layer and the flexible conductive layer being arranged on the flexible insulating layer；
Wherein, the first layer and flexible insulating layer are the separated layers of main body, the flexible insulating layer along it is a succession of
The contact portion separated on the first layer is combined together with the first layer.
Preferably, the channel is provided with the surface of the first layer along the equal spacing in length direction of the first layer.
Preferably, the frame array for constituting and being evenly arranged on the first layer is arranged in parallel in each channel, described
Wall is formed between the two neighboring channel.
Preferably, the width in channel distance between 0.5mm-20mm, the two neighboring channel is no more than 25mm.
Preferably, the back electrode plate is set as being adapted to the shape in the channel, and back electrode plate upper end is set
It is set to ripple struction, the ripple struction top is flushed with the first layer upper surface.
Preferably, the first layer and flexible insulating layer are combined by spacer, the spacer adherency
To on this two layers, the spacer is in the form of the band continuously or intermittently extended along the wall, or between described
The spacer of interlayer dispersion separated by a distance.
Preferably, the first layer and flexible insulating layer are combined by adhesive, and described adhesive is institute
It states first layer and flexible insulating layer links together, glue continuously or intermittently of the described adhesive to extend along the wall
The form of band/water, or in the form of the bonding die along wall dispersion separated by a distance.
Preferably, the first layer and flexible insulating layer are combined together by pad, and the pad is described in
First layer and flexible insulating layer link together, and the pad is with the continuously or intermittently pad that extends along the wall
Form, or in the form of the pad along wall dispersion separated by a distance.
Preferably, the flexible insulating layer of each back electrode plate upper end is separated linkage by the contact portion.
Preferably, the back electrode plate is that monolithic conductive structure or back electrode plate surface have conductive layer, Mei Gesuo
The current-carrying part for stating back electrode plate is connected with independent power amplifier driving signal.
The present invention is include at least the following beneficial effects:
1, the transmitting intensity of acoustic wave of energy converter is controllable；
2, the transmitting sound wave direction of energy converter is controllable, so that sound wave has directive property, realizes the following function of sound wave, with full
It is enough to high-end place use demand.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the decomposition texture schematic diagram of energy converter first layer and the second layer；
Fig. 2 is the cross-sectional view of multichannel electrostatic transducer of the invention.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other elements or combinations thereof.
Embodiment one
Electricity of the present invention provides a kind of back pole plate multichannel electrostatic transducer, as shown in Figs. 1-2, including has certain thick
First layer 103 and the setting second layer 101 on first layer 103 of degree, it can be insulating polymer that first layer 103, which is insulating layer,
Material, 103 surface of first layer, which is spaced apart, is equipped with multiple channels, in the present embodiment, channel along first layer 103 length direction etc.
Spacing is provided with the surface of first layer 103, and the frame battle array for constituting and being evenly arranged on first layer 103 is arranged in parallel in each channel
It arranges, trough is provided on the first layer 103 of frame array surrounding, wall 104 is formed between two neighboring channel, so that respectively
The width of mutually insulated between a channel, wall 104 is preferably 0.5mm.
It is provided with a back electrode plate 102 in each channel, to form multi-channel structure on first layer 103, has
Body, back electrode plate 102 is set as being adapted to the shape in channel, so that back electrode plate 102 is just filled in the channel, back
Portion's electrode plate 102 is that monolithic conductive structure or 102 surface of back electrode plate have a conductive layer, in the present embodiment, back electrode plate
102 have conductive layer for surface, which can take the works such as spraying plating for metal, conductive other materials or surface
Skill adheres to the other materials of conductive energy material.The conductive layer on each 102 surface of back electrode plate is connected with a power amplifier
Driving signal, so that independent driving is realized, to control the voltage swing and phase of each back electrode plate 102.
Channel is rectangular configuration, and for the width in channel in 0.5mm-20mm, the present embodiment, the width in channel is 5mm, adjacent
Distance is no more than 25mm between two channels, guarantees that distance is no more than the half-wavelength for emitting sound wave between two neighboring channel, from
And make half-wavelength of the distance between the two neighboring back electrode plate 102 no more than sound wave, to not generate secondary lobe.
The second layer 101 is vibrating membrane, and for loading audio or ultrasonic signal, the second layer 101 includes being arranged in first layer 103
On flexible insulating layer 202 and the flexible conductive layer 201 that is arranged on flexible insulating layer 202, flexibility is led in the present embodiment
Electric layer 201 is thin to provide the vibration that overall thickness is about 8um in the form of the outer surface plating metal in flexible insulating layer 202
Film, flexible conductive layer 201 can be polymerizable material, and metal material, graphene, carbon etc., flexible insulating layer 202 can be poly- pair
Ethylene terephthalate (pet), polyphenylene sulfide (pps) etc..
Wherein, 202 lower end periphery of flexible insulating layer is connected on the trough of 103 periphery of first layer, so that flexible insulation
Layer 202 is in tensioned state, and the main part among flexible insulating layer 202 is to separate with 103 intermediate region of first layer, and soft
Property insulating layer 202 among main part be in tensioned state, 102 upper end of back electrode plate is set as ripple struction, ripple knot
Structure top is flushed with 103 upper surface of first layer, and flexible insulating layer 202 is placed exactly in the upper end of ripple struction, and ripple struction has
Effect increases the sensitivity of energy converter.
Each 104 upper end of wall is provided with spacer 203, spacer 203 is to extend along 104 upper end of wall
The form of band continuously or intermittently, or the spacer 203 along the dispersion separated by a distance of wall 104.In the present embodiment,
Spacer 203 uses continuous belt-like form, and spacer 203 is covered with along the length direction of wall 104 in the upper of wall 104
Body region among end, first layer 103 and flexible insulating layer 202 is combined by spacer 203, so that spacer
203 are adhered on this two layers, and flexible insulating layer 202 is fixed on first layer 103 along the position of spacer 203, thus
Each 102 upper end of back electrode plate forms 202nd area of flexible insulating layer of self-movement corresponding with 102 area of back electrode plate
Domain, that is to say, that the flexible insulating layer 202 in each 102 width direction upper end two sides of back electrode plate is fixed on wall 104
On, the up and down motion of flexible insulating layer 202 of each 102 upper end of back electrode plate is not interfere with each other.
201 it can be applied with DC offset voltage in flexible conductive layer, while in the surface conductance of each back electrode plate 102
Layer is applied with independent power amplifier driving signal, so that effect of the second layer 101 of each 102 upper end of back electrode plate in electrostatic force
Respectively mobile toward and away from first layer 103 down, air of the movement of the second layer 101 to driving in its two sides issues corresponding
Sound wave.It, can be every with independent control since the alternating voltage applied on each back electrode plate 102 drives independently of each other
The amplitude and phase that the second layer 101 of a 102 upper end of back electrode plate vibrates, that is to say, that each 102 upper end of back electrode plate
The second layer 101 in region issues independent sound wave, controls the ac voltage signal applied on each back electrode plate 102, i.e., controllably
The amplitude and phase for making each transmitting sound wave finally control the interaction of each transmitting sound wave, control side lobe effect, Jin Erke
To reduce secondary lobe quantity, loss can be reduced, while can control the directionality and amplitude size of main lobe, so that transmitting sound wave tool
There is directive property, the tracking to moving target may be implemented, improves audio experience, meet the application demand in high-end place, usual wave
Valve width is narrower, and the directionality of sound wave is better, and operating distance is remoter, and anti-interference ability is stronger, therefore reduces to the greatest extent two neighboring
The distance between back electrode plate 102 makes it be less than or equal to the half of wave length of sound, will not generate secondary lobe effect at this time
It answers, power loss is lower, and sound wave directionality is more preferable.
Embodiment two
It is the connection type of first layer 103 and flexible insulating layer 202 with the difference of embodiment one, in each wall
104 upper ends are provided with adhesive 203 flexible, and adhesive 203 is the glue continuously or intermittently to extend along 104 upper end of wall
The form of band/water, or the bonding die along the dispersion separated by a distance of wall 104.In the present embodiment, adhesive 203 is used
Continuous glue pattern, adhesive 203 are covered with along the length direction of wall 104 in the upper end of wall 104, first layer 103
It is combined by adhesive 203 with the body region among flexible insulating layer 202, so that adhesive 203 is adhered to this
On two layers, flexible insulating layer 202 is fixed on first layer 103 along the position of adhesive 203, thus in each back electrode
102 upper end of plate forms 202 region of flexible insulating layer of self-movement corresponding with 102 area of back electrode plate, that is to say, that
The flexible insulating layer 202 of each 102 width direction upper end two sides of back electrode plate is fixed on wall 104, each back electricity
The up and down motion of flexible insulating layer 202 of 102 upper end of pole plate is not interfere with each other.
Embodiment three
It is the connection type of first layer 103 and flexible insulating layer 202 with the difference of embodiment one, by each wall
The flexible insulating layer 202 of 104 upper ends corresponding position is welded on often along the mode continuously or intermittently that 104 upper end of wall extends
A 104 upper end of wall, or each 104 upper end of wall is welded on along wall 104 is separated by a distance, so that first layer
103 and flexible insulating layer 202 it is fixed, flexible insulating layer 202 is in tensioned state.In the present embodiment, pad 203 is using interrupted
The form welded of mode, pad 203 is discontinuously distributed in the upper end of wall 104 along the length direction of wall 104, first
Body region among layer 103 and flexible insulating layer 202 is combined by pad 203, so that pad 203 adheres to
To on this two layers, flexible insulating layer 202 is fixed on first layer 103 along the position of pad 203, thus at each back
102 upper end of electrode plate forms 202 region of flexible insulating layer of self-movement corresponding with 102 area of back electrode plate, that is,
It says and is fixed on wall 104 in the flexible insulating layer 202 of each 102 width direction upper end two sides of back electrode plate, each back
The up and down motion of flexible insulating layer 202 of 102 upper end of portion's electrode plate is not interfere with each other.
From the above mentioned, energy converter of the invention is provided with the electrode plate of multichannel, each electrode plate upper end on back pole plate
Vibrating membrane Independent Vibration, and the voltage signal on each electrode plate independently drives, and passes through and loads letter on each electrode plate of control
Number amplitude and phase, the Independent adjustable of each electrode plate upper end vibrating membrane Oscillation Amplitude and phase is realized, to control whole
The acoustic irradiation direction of a energy converter can realize tracking of the sound wave to dynamic object, to be satisfied with high-end place use demand.Together
When, side lobe effect can be eliminated, sound quality is improved, reduces noise and loss.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of back pole plate multichannel electrostatic transducer characterized by comprising
First layer is insulating layer, and first layer surface, which is spaced apart, is equipped at least two channels；
Back electrode plate, setting is in the channel；And
The second layer, can load audio or ultrasonic signal, and the second layer includes the flexible insulation of setting on the first layer
Layer and the flexible conductive layer being arranged on the flexible insulating layer；
Wherein, the first layer and flexible insulating layer are the separated layers of main body, and the flexible insulating layer is along a succession of described
The contact portion separated on first layer is combined together with the first layer.
2. back pole plate multichannel electrostatic transducer as described in claim 1, which is characterized in that the channel is along described
One layer of equal spacing in length direction is provided with the surface of the first layer.
3. back pole plate multichannel electrostatic transducer as described in claim 1, which is characterized in that each channel is set in parallel
The frame array for constituting and being evenly arranged on the first layer is set, forms wall between the two neighboring channel.
4. back pole plate multichannel electrostatic transducer as claimed in claim 3, which is characterized in that the width in the channel exists
0.5mm-20mm, distance is no more than 25mm between the two neighboring channel.
5. back pole plate multichannel electrostatic transducer as described in claim 1, which is characterized in that the back electrode plate setting
For the shape for being adapted to the channel, back electrode plate upper end is set as ripple struction, the ripple struction top with
The first layer upper surface flushes.
6. back pole plate multichannel electrostatic transducer as claimed in claim 3, which is characterized in that the first layer and flexibility are exhausted
Edge layer be it is combined by spacer, the spacer is adhered on this two layers, and the spacer is between described
The form for the band continuously or intermittently that interlayer extends, or the spacer along wall dispersion separated by a distance.
7. back pole plate multichannel electrostatic transducer as claimed in claim 3, which is characterized in that the first layer and flexibility are exhausted
Edge layer be it is combined by adhesive, described adhesive links together the first layer and flexible insulating layer, institute
In the form of adhesive tape/water continuously or intermittently that adhesive is stated to extend along the wall, or to be separated by one along the wall
The form of the bonding die of the dispersion of set a distance.
8. back pole plate multichannel electrostatic transducer as claimed in claim 3, which is characterized in that the first layer and flexibility are exhausted
Edge layer is combined together by pad, and the pad links together the first layer and flexible insulating layer, described
Pad is in the form of the continuously or intermittently pad extended along the wall, or with separated by a distance along the wall
Dispersion pad form.
9. back pole plate multichannel electrostatic transducer as described in claim 1, which is characterized in that the contact portion is by each institute
The flexible insulating layer for stating back electrode plate upper end separates linkage.
10. back pole plate multichannel electrostatic transducer as described in claim 1, which is characterized in that the back electrode plate is
Monolithic conductive structure or back electrode plate surface have conductive layer, and the current-carrying part of each back electrode plate is connected with solely
Vertical power amplifier driving signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611267453.6A CN106714055B (en) | 2016-12-31 | 2016-12-31 | Back pole plate multichannel electrostatic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611267453.6A CN106714055B (en) | 2016-12-31 | 2016-12-31 | Back pole plate multichannel electrostatic transducer |
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| Publication Number | Publication Date |
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| CN106714055A CN106714055A (en) | 2017-05-24 |
| CN106714055B true CN106714055B (en) | 2019-04-19 |
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| CN201611267453.6A Active CN106714055B (en) | 2016-12-31 | 2016-12-31 | Back pole plate multichannel electrostatic transducer |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362371A (en) * | 2018-04-08 | 2018-08-03 | 东莞泉声电子有限公司 | Vibrate membrane structure and vibration detecting sensor |
| CN114390417B (en) * | 2021-10-12 | 2023-07-25 | 苏州清听声学科技有限公司 | Screen directional sounding device and preparation method thereof |
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| CN1812661A (en) * | 2005-12-29 | 2006-08-02 | 电子科技大学 | Acoustic frequency directional ultrasonic wave Loudspeaker |
| WO2012156753A1 (en) * | 2011-05-19 | 2012-11-22 | Warwick Audio Technologies Limited | Electrostatic transducer |
| CN203072152U (en) * | 2012-11-09 | 2013-07-17 | 瑞泽科技股份有限公司 | Electrostatic loudspeaker with multi-sound channel output |
| CN104907241A (en) * | 2015-06-17 | 2015-09-16 | 河南大学 | Broadband ultrasonic transducer composite mechanism satisfying multifrequency requirement |
| CN204724434U (en) * | 2015-06-17 | 2015-10-28 | 河南大学 | Meet the broadband ultrasonic transducer composite structure of multi-frequency demand |
| CN105247889A (en) * | 2013-03-21 | 2016-01-13 | 诺威托系统有限公司 | Transducer system |
| CN106165449A (en) * | 2014-02-11 | 2016-11-23 | 沃威音响技术有限公司 | The electrostatic transducer improved |
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2016
- 2016-12-31 CN CN201611267453.6A patent/CN106714055B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1812661A (en) * | 2005-12-29 | 2006-08-02 | 电子科技大学 | Acoustic frequency directional ultrasonic wave Loudspeaker |
| WO2012156753A1 (en) * | 2011-05-19 | 2012-11-22 | Warwick Audio Technologies Limited | Electrostatic transducer |
| CN203072152U (en) * | 2012-11-09 | 2013-07-17 | 瑞泽科技股份有限公司 | Electrostatic loudspeaker with multi-sound channel output |
| CN105247889A (en) * | 2013-03-21 | 2016-01-13 | 诺威托系统有限公司 | Transducer system |
| CN106165449A (en) * | 2014-02-11 | 2016-11-23 | 沃威音响技术有限公司 | The electrostatic transducer improved |
| CN104907241A (en) * | 2015-06-17 | 2015-09-16 | 河南大学 | Broadband ultrasonic transducer composite mechanism satisfying multifrequency requirement |
| CN204724434U (en) * | 2015-06-17 | 2015-10-28 | 河南大学 | Meet the broadband ultrasonic transducer composite structure of multi-frequency demand |
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