CN202026458U - Film loudspeaker array - Google Patents
Film loudspeaker array Download PDFInfo
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- CN202026458U CN202026458U CN2011201424258U CN201120142425U CN202026458U CN 202026458 U CN202026458 U CN 202026458U CN 2011201424258 U CN2011201424258 U CN 2011201424258U CN 201120142425 U CN201120142425 U CN 201120142425U CN 202026458 U CN202026458 U CN 202026458U
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Abstract
The utility model relates to a film loudspeaker array, which comprises a piezoelectric electret film and a circuit board assembly. The piezoelectric electret film is a multihole polymer film, and electrode arrays are correspondingly arranged on two sides of the piezoelectric electret film respectively. A loudspeaker circuit, a circuit board input end and a circuit board output end are arranged on the circuit board assembly, the circuit board input end and the circuit board output end are electrically connected with the loudspeaker circuit, and the circuit board output end are electrically connected with the electrode arrays arranged on the two sides of the piezoelectric electret film. The film loudspeaker array made of the multihole polymer film combines high directivity of a loudspeaker array and light weight, thinness, softness, simple structure, strong reliability, low cost and the like of a polymer piezoelectric electret, and greatly widens the application of the loudspeaker array, thereby enabling the film loudspeaker array to be one of the choices to replace a traditional loudspeaker in environments of a theatre, a meeting place, a classroom, a museum, a gymnasium and the like.
Description
[technical field]
The utility model relates to the loud speaker field, relates in particular to a kind of film-type loudspeaker array.
[background technology]
In places such as theater, meeting-place, classroom, museum, gymnasium, to certain requirement that amplified.Common one or two loud speaker do not reach the effect that amplifies, and the sound non-directive, and big energy is wasted in other direction (for example ceiling) but not propagates into audience's direction.If use loudspeaker array, then can utilize principle of interference to control the directive property of sound, and obtain the effect high-power, that far throw is penetrated.For example linear loudspeaker array is made up of a column unit loud speaker, has advantages such as level covers evenly, vertical directivity is strong, the interior sound energy attenuation of radiation area is less.For in identical place during with identical volume public address, the linear loudspeaker array system bulk is littler, lighter, be more prone to lifting.Linear loudspeaker array also can be used in combination the concrete shape in place, with its appropriate hanging, aim at and bending, can provide outstanding tonequality performance to most spectators.Except linear loudspeaker array, also have sphere shape loudspeaker array etc., or design corresponding array according to the actual requirements.In addition,, sound can be partial to by the phase place of each loud speaker in the accurate adjustment array, and the reflection of process metope, loudspeaker array can produce the audio of multichannel surround sound, has very practical meaning at aspects such as home theaters.
The loudspeaker unit that traditional loudspeaker array uses mainly is a cardon formula loud speaker.Cardon formula loud speaker contains mobilizable coil, and when tone currents passed through, under the effect in magnetic field, coil was done and the corresponding motion of audio signal, and coil drives paper disc, sounds.In addition, also has moving iron type loud-speaker, oscillating component is an iron plate that is suspended in electromagnet the place ahead, make the electromagnet changes of magnetic field during signal process electromagnet, make the iron plate vibration, iron plate is transmitted to the central point of a miniature vibrating diaphragm by the pitman of a precise structure, thereby makes vibrating diaphragm produce vibration and sounding.Since comprise a plurality of parts, cardon formula and moving iron type loud-speaker complex structure, and volume is bigger, uses inconvenience.
[utility model content]
Based on this, be necessary to provide a kind of simple in structure, film-type loudspeaker array that volume is less.
A kind of film-type loudspeaker array comprises piezo-electric electret thin film and circuit board module, and described piezo-electric electret thin film is a porous polymer film, and described piezo-electric electret thin film both sides correspondence respectively are provided with electrod-array; Described circuit board module is provided with speaker circuit and wiring board input that is electrically connected with described speaker circuit and wiring board output, and described wiring board output is electrically connected with the electrod-array of described piezo-electric electret thin film both sides.
In preferred embodiment, speaker circuit comprises digital to analog converter and the decoder that is electrically connected with described digital to analog converter.
In preferred embodiment, also comprise the connector that is fixed on the circuit board module, connector comprises connector input and connector output, the wiring board output comprises the first wiring board output and the second wiring board output, the first wiring board output is electrically connected with the electrod-array of piezo-electric electret thin film one side by connector input, connector output successively, the corresponding setting of electrod-array of the second wiring board output and piezo-electric electret thin film opposite side, the second wiring board output is electrically connected with the electrod-array of this side by conducting resinl or tin cream.
In preferred embodiment, circuit board module is fixed on piezo-electric electret thin film one side, the wiring board output comprises the first wiring board output and the second wiring board output, and the first wiring board output and the second wiring board output are electrically connected with the electrod-array of piezo-electric electret thin film both sides respectively.
In preferred embodiment, also comprise the connector that is fixed on piezo-electric electret thin film one side, connector is provided with connector input, the first connector output and the second connector output, the connector input is electrically connected with the wiring board output, and the first connector output and the second connector output are electrically connected with the electrod-array of piezo-electric electret thin film both sides respectively.
In preferred embodiment, the connector input is electrically connected by wired or wireless signal with the wiring board output.
In preferred embodiment, the wiring board input is provided with wired or wireless signal receiving device.
In preferred embodiment, the piezo-electric electret thin film surface is provided with waterproof membrane or radiation prevention film.
Based on the piezo-electric electret of porous polymer film have that piezoelectric response is big, light weight (gram level), thin thickness (micron order), material softness be easy to bending, adapt to various environment (corrosion-resistant, waterproof), nontoxic environmental protection, advantages such as (polymer film output are very big) with low cost.Concerning the film-type loudspeaker array, utilize reciprocal piezoelectric effect, piezo-electric electret thin film itself just can be finished the electroacoustic conversion, need not vibration part, has reduced the volume of device greatly; Be stored in charge stable on the inner hole of the film interface, be difficult for losing, make that the electroacoustic conversion performance of piezo-electric electret is stable; Number of parts reduces, and manufacturing process is simple, and reliability strengthens, and cost descends.This film-type loudspeaker array has that frequency response is wide and flat, harmonic distortion is low, the cut-off frequency advantages of higher.
[description of drawings]
Fig. 1 is embodiment 1 a piezo-electric electret thin film vertical view;
Fig. 2 is the cutaway view of piezo-electric electret thin film among Fig. 1;
Fig. 3 is the circuit board module of embodiment 1 and the vertical view of connector;
Fig. 4 is the cutaway view of circuit board module and connector among Fig. 3;
Fig. 5 is the combination schematic diagram of piezo-electric electret thin film and circuit board module, connector;
Fig. 6 is the piezo-electric electret thin film of embodiment 2 and the vertical view of circuit board module;
Fig. 7 is the cutaway view of piezo-electric electret thin film and circuit board module among Fig. 6;
Fig. 8 is the piezo-electric electret thin film of embodiment 3 and the vertical view of circuit board module;
Fig. 9 is the cutaway view of piezo-electric electret thin film and circuit board module among Fig. 8.
[embodiment]
Mainly reaching specific embodiment below in conjunction with the accompanying drawings is described in further detail the film-type loudspeaker array.
Embodiment 1
Please in conjunction with Fig. 1-Fig. 4, the film-type loudspeaker array of present embodiment comprises piezo-electric electret thin film 110, circuit board module 120 and connector 130.
Piezo-electric electret thin film 110 is that thickness is at tens porous polymer films that arrive between the hundreds of micron.As depicted in figs. 1 and 2, the piezo-electric electret thin film 110 of present embodiment is square, and the equal correspondence in both sides is provided with 3 * 3 block type electrode formation electrod-array 112.Every pair of block type electrode of both sides correspondence and the piezo-electric electret thin film between them be common to form a loudspeaker unit.Present embodiment comprises 9 loudspeaker units.Piezo-electric electret thin film 110 is provided with the electrode link 114 that is electrically connected each block type electrode of side in edge.
Porous polymer film deposits positive and negative charge by high voltage polarization respectively in the hole upper and lower surface, forms electric dipole, by at the two-sided electrode evaporation respectively of film, forms piezoelectric film then.When apply an alternating voltage to piezoelectric film, because reciprocal piezoelectric effect, piezoelectric film vibrates, and produces sound wave, thereby realizes the electroacoustic conversion.
As shown in Figure 3 and Figure 4, circuit board module 120 is provided with speaker circuit (not shown), wiring board input 122, the first wiring board output 124 and the second wiring board output 126.The decoder that is provided with digital to analog converter in the speaker circuit and is electrically connected with described digital to analog converter.The second wiring board output 126 of present embodiment and block type electrode, the shape of electrod-array 112, position are corresponding, form the output array.
As shown in Figure 5, the output array that the second wiring board output 126 of present embodiment forms by with the electrod-array 112 corresponding bonding connections of piezo-electric electret thin film 110 1 sides, and piezo-electric electret thin film 110 is fixed on the circuit board module 120.The corresponding first wiring board output 124 is electrically connected with the electrod-array 112 of piezo-electric electret thin film 110 opposite sides by connector input 132, connector output 134, electrode link 114 successively.
Fixedly connected by conducting resinl or tin cream between output array 126 and the electrod-array 112.
The wiring board input 122 of present embodiment is provided with wireless or wired signal receiving device, to be used for the received signal input.
Import the set of number signal that comprises whole acoustic informations from the external world, be delivered to speaker circuit through wiring board input 122; After the processing of Digital Signal Processing (DSP) chip in the speaker circuit, obtain and the corresponding many group digital signals of each loudspeaker unit; Through decoder and digital to analog converter these many group digital signals are decoded and digital-to-analogue conversion again, obtain comprising many groups analog signal of different information; Many group analog signals are delivered to respectively on the corresponding loudspeaker unit through the first wiring board output 124 and the second wiring board output 126; Under the effect of analog electrical signal, piezo-electric electret thin film 110 produces voice signal.Because each loudspeaker unit produces the corresponding acoustical signal of receiving with it of analog electrical signal, then whole membrane array produces and reaches the sound effect of demand in advance.
The thickness of electrod-array 112 is nanometer scale, and the thickness of piezo-electric electret thin film 110, circuit board module 120, connector 130 is micron dimension, thereby whole film-type loudspeaker array thickness can reach ultra-thin.
Embodiment 2
As shown in Figure 6 and Figure 7, the film-type loudspeaker array of present embodiment comprises piezo-electric electret thin film 210 and circuit board module 220.
Piezo-electric electret thin film 210 is that thickness is at tens porous polymer films that arrive between the hundreds of micron.The piezo-electric electret thin film 210 of present embodiment is square, and the equal correspondence in both sides is provided with 3 * 3 block type electrode formation electrod-array 212.Every pair of block type electrode of both sides correspondence and the piezo-electric electret thin film between them be common to form a loudspeaker unit.Present embodiment comprises 9 loudspeaker units.Piezo-electric electret thin film 210 is provided with the first electrode link 214 and the second electrode link 216 that is electrically connected each electrode of both sides in edge.
The circuit board module 220 of present embodiment is fixed on the white space of piezo-electric electret thin film 210.Circuit board module 220 is provided with speaker circuit (not shown), wiring board input 222, the first wiring board output 224 and the second wiring board output 226.The first wiring board output 224 is electrically connected with the first electrode link 214, and the second wiring board output 226 is electrically connected with the second electrode link 216 that crosses piezo-electric electret thin film.
Adopt circuit board module 220 to be fixed on the piezo-electric electret thin film 210, simple in structure, the thickness of whole film-type loudspeaker array is 1 thinner than embodiment, volume is littler.
Embodiment 3
As Fig. 8 and shown in Figure 9, the film-type loudspeaker array of present embodiment comprises piezo-electric electret thin film 310, circuit board module 320 and connector 330.
Piezo-electric electret thin film 310 is that thickness is at tens porous polymer films that arrive between the hundreds of micron.The piezo-electric electret thin film 310 of present embodiment is square, and the equal correspondence in both sides is provided with 3 * 3 block type electrode formation electrod-array 312.Every pair of block type electrode of both sides correspondence and the piezo-electric electret thin film between them be common to form a loudspeaker unit.Present embodiment comprises 9 loudspeaker units.Piezo-electric electret thin film 310 is provided with the first electrode link 314 and the second electrode link 316 that is electrically connected each electrode of both sides in edge.
The thickness of electrod-array 312 is nanometer scale, and the thickness of piezo-electric electret thin film 310, circuit board module 320, connector 330 is micron dimension, thereby whole film-type loudspeaker array is exactly two films that link to each other by lead.This embodiment scheme is more flexible, and circuit board module 320 can be placed on the place of actual demand.
In other preferred embodiments, connector input 332 can also be electrically connected by wireless mode with wiring board output 324, thereby circuit board module 320 can be placed on the position that needs flexibly.
Based on the piezo-electric electret of porous polymer film have that piezoelectric response is big, light weight (gram level), thin thickness (micron order), material softness be easy to bending, adapt to various environment (corrosion-resistant, waterproof), nontoxic environmental protection, advantages such as (polymer film output are very big) with low cost.Concerning the film-type loudspeaker array, utilize reciprocal piezoelectric effect, piezo-electric electret thin film itself just can be finished the electroacoustic conversion, need not vibration part, has reduced the volume of device greatly; Be stored in charge stable on the inner hole of the film interface, be difficult for losing, make that the electroacoustic conversion performance of piezo-electric electret is stable; Number of parts reduces, and manufacturing process is simple, and reliability strengthens, and cost descends.This film-type loudspeaker array has that frequency response is wide and flat, harmonic distortion is low, the cut-off frequency advantages of higher.
In other preferred embodiments, the film-type loudspeaker array can comprise the loudspeaker unit of M * N square, polygon, circle, ellipse and other given shape, as long as the identical and queueing discipline of shape and size of all loudspeaker units.Piezo-electric electret thin film can be formed by stacking by two-layer or two-layer above porous polymer film, and to be electrically connected to increase piezoelectric response be sensitivity, and shape, size, the arrangement of institute's electrode evaporation are identical and in correspondence with each other on each lamination electroelectret film.
In addition, can also be at surface coverage one deck waterproof membrane of piezo-electric electret thin film, thus this film-type loudspeaker array can be applicable under water or very moist environment; Perhaps cover other for example radiation prevention film etc.The color of waterproof membrane or radiation prevention film can be consistent with environment, and then this film-type loudspeaker array can lay very snugly.
The film-type loudspeaker array that uses porous polymer film to make combines the advantage of loudspeaker array high directivity and polymer piezo-electric electret is light, thin, soft, simple in structure, good reliability, advantage such as with low cost, greatly expanded the application of loudspeaker array, make it one of selection that becomes alternative conventional loudspeakers array under the environment such as theater, meeting-place, classroom, museum, gymnasium, and have application promise in clinical practice at microelectronics technologies such as ultra-thin mobile communication.
Because the decoder that speaker circuit comprises digital to analog converter and is electrically connected with described digital to analog converter can be made into the digital loudspeaker array, conveniently carries out integrated design, and complete audio frequency solution is provided.Above-mentioned all device manufacture methods are simple, can change the shape, size, arrangement of loudspeaker unit with realistic demand by shape, size, the arrangement that changes electrode evaporation.Entire device can be pulled down and shift and be placed to other place, is fit to move use, and removes can to curl according to its soft characteristics in the back or folding, is convenient for carrying.The material compliance with environmental protection requirements, wide material sources and cost are low.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (8)
1. a film-type loudspeaker array is characterized in that, comprises piezo-electric electret thin film and circuit board module, and described piezo-electric electret thin film is a porous polymer film, and described piezo-electric electret thin film both sides correspondence respectively are provided with electrod-array; Described circuit board module is provided with speaker circuit and wiring board input that is electrically connected with described speaker circuit and wiring board output, and described wiring board output is electrically connected with the electrod-array of described piezo-electric electret thin film both sides.
2. film-type loudspeaker array as claimed in claim 1 is characterized in that, described speaker circuit comprises digital to analog converter and the decoder that is electrically connected with described digital to analog converter.
3. film-type loudspeaker array as claimed in claim 1, it is characterized in that, also comprise the connector that is fixed on the described circuit board module, described connector comprises connector input and connector output, described wiring board output comprises the first wiring board output and the second wiring board output, the described first wiring board output is successively by described connector input, the connector output is electrically connected with the electrod-array of described piezo-electric electret thin film one side, the corresponding setting of electrod-array of the described second wiring board output and described piezo-electric electret thin film opposite side, the described second wiring board output is electrically connected with the electrod-array of this side by conducting resinl or tin cream.
4. film-type loudspeaker array as claimed in claim 1, it is characterized in that, described circuit board module is fixed on described piezo-electric electret thin film one side, described wiring board output comprises the first wiring board output and the second wiring board output, and the described first wiring board output and the second wiring board output are electrically connected with the electrod-array of described piezo-electric electret thin film both sides respectively.
5. film-type loudspeaker array as claimed in claim 1, it is characterized in that, also comprise the connector that is fixed on described piezo-electric electret thin film one side, described connector is provided with connector input, the first connector output and the second connector output, described connector input is electrically connected with described wiring board output, and the described first connector output and the second connector output are electrically connected with the electrod-array of described piezo-electric electret thin film both sides respectively.
6. film-type loudspeaker array as claimed in claim 5 is characterized in that, described connector input is electrically connected by wired or wireless signal with described wiring board output.
7. as each described film-type loudspeaker array of claim 1-6, it is characterized in that described wiring board input is provided with wired or wireless signal receiving device.
8. film-type loudspeaker array as claimed in claim 1 is characterized in that, described piezo-electric electret thin film surface is provided with waterproof membrane or radiation prevention film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201424258U CN202026458U (en) | 2011-05-06 | 2011-05-06 | Film loudspeaker array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201424258U CN202026458U (en) | 2011-05-06 | 2011-05-06 | Film loudspeaker array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202026458U true CN202026458U (en) | 2011-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201424258U Expired - Fee Related CN202026458U (en) | 2011-05-06 | 2011-05-06 | Film loudspeaker array |
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| CN (1) | CN202026458U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102143425A (en) * | 2011-05-06 | 2011-08-03 | 深圳市豪恩声学股份有限公司 | Film speaker array |
| CN113347538A (en) * | 2021-08-05 | 2021-09-03 | 深圳市汇鑫垒刀模科技有限公司 | Heat dissipation damping loudspeaker |
-
2011
- 2011-05-06 CN CN2011201424258U patent/CN202026458U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102143425A (en) * | 2011-05-06 | 2011-08-03 | 深圳市豪恩声学股份有限公司 | Film speaker array |
| CN102143425B (en) * | 2011-05-06 | 2013-10-09 | 深圳市豪恩声学股份有限公司 | Film speaker array |
| CN113347538A (en) * | 2021-08-05 | 2021-09-03 | 深圳市汇鑫垒刀模科技有限公司 | Heat dissipation damping loudspeaker |
| CN113347538B (en) * | 2021-08-05 | 2021-10-01 | 深圳市汇鑫垒刀模科技有限公司 | Heat dissipation damping loudspeaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111102 Termination date: 20140506 |