CN111491238A - Three-dimensional film loudspeaker - Google Patents
Three-dimensional film loudspeaker Download PDFInfo
- Publication number
- CN111491238A CN111491238A CN201910079988.8A CN201910079988A CN111491238A CN 111491238 A CN111491238 A CN 111491238A CN 201910079988 A CN201910079988 A CN 201910079988A CN 111491238 A CN111491238 A CN 111491238A
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- Prior art keywords
- film
- sound
- speaker
- stereoscopic
- generating
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005452 bending Methods 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 9
- 239000011651 chromium Substances 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910003437 indium oxide Inorganic materials 0.000 claims description 3
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 claims description 3
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 3
- 229910001887 tin oxide Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229920009405 Polyvinylidenefluoride (PVDF) Film Polymers 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/127—Non-planar diaphragms or cones dome-shaped
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/005—Piezoelectric transducers; Electrostrictive transducers using a piezoelectric polymer
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
The invention discloses a stereo film loudspeaker, which comprises: the film sounding component comprises a piezoelectric film and two conducting layers; the two conductive components are respectively electrically connected with the two conductive layers, and the two conductive components are respectively electrically connected with an audio source signal; the film sounding assembly is divided into a plurality of area units, the film sounding assembly is multiple, every two adjacent area units are bent at the intersection of the area units, a plurality of bending lines located at the intersection of the area units are formed, every two adjacent area units are formed, an included angle is formed between the area units, the film sounding assembly is made to be of a structure with a concave surface, and the concave surface faces to the sounding direction of the film sounding assembly output sound field.
Description
Technical Field
The present invention relates to a stereo film speaker, and more particularly, to a stereo film speaker for outputting audio signals.
Background
With the progress of the times and the demand of consumers for portability, consumer electronic products are gradually becoming lighter, thinner and miniaturized, and thus various components used in electronic products are also becoming more miniaturized and thinner. For electronic products such as mobile phones, wearable devices, and digital assistants, the speaker is one of the important components of the electronic products because it is capable of converting an electronic signal into an audio signal.
The use of piezoelectric film speakers has been increasingly popular for the purpose of miniaturization and thinning. The piezoelectric loudspeaker utilizes the piezoelectric effect of piezoelectric material, and when an electric field is added to the piezoelectric material, the material is deformed, so as to drive the vibration film to produce sound. The piezoelectric type loudspeaker is simple in structure, can be made into a film type plane loudspeaker, does not need an external sound box, can be fixed in a limited space, and is the first choice for developing the application of a micro-electronic product. However, the conventional film type piezoelectric speaker can obtain excellent performance only in a high audio frequency range due to structural characteristics, has poor performance and high distortion rate for a low audio frequency, and has insufficient sound pressure of an output sound field and poor output power due to limited amplitude of the piezoelectric film.
Because of the above reasons, the conventional film speaker has disadvantages in use, and how to solve the above problems by structural improvement has become one of the important issues to be solved by the industry.
Disclosure of Invention
The invention mainly aims to solve the defects that the existing film loudspeaker is poor in sound output efficiency and insufficient in power, and the audio frequency range is limited to the high audio frequency range.
The embodiment of the invention provides a three-dimensional film loudspeaker, which comprises: the film sounding assembly comprises a piezoelectric film and two conducting layers, the piezoelectric film is provided with an upper side face and a lower side face which are opposite, the two conducting layers are arranged on the upper side face and the lower side face of the piezoelectric film, and the two conducting layers are electrically connected with a sound source signal; wherein, the scope definition that film sound production subassembly can sound is the work area, film sound production subassembly's work area separates for a plurality of regional units, film sound production subassembly is in a plurality of every two are adjacent in the middle of the regional unit handing-over department is buckled mutually, and forms a plurality of bend lines, and makes every two adjacent have an contained angle between the regional unit, and make film sound production subassembly forms the structure that has the concave surface, just the concave surface orientation the play sound direction in film sound production subassembly output sound field.
In a preferred embodiment of the present invention, two supporting frames are further disposed on the periphery of the film sound-generating assembly, the two supporting frames surround the periphery of the film sound-generating assembly and are oppositely clamped on two opposite side surfaces of the edge of the film sound-generating assembly, and the bending strength of the supporting frames is greater than that of the film sound-generating assembly, so as to reinforce the bending strength of the area around the film sound-generating assembly.
In a preferred embodiment of the present invention, an included angle between every two adjacent area units is between 179 degrees and 90 degrees.
In a preferred embodiment of the present invention, a circular arc bend is formed at the bending line where every two adjacent area units are connected, and a radius of curvature of the circular arc bend is greater than one half of a thickness of the film sound-generating component.
In a preferred embodiment of the present invention, the piezoelectric film is a polyvinylidene fluoride (PVDF) film.
In a preferred embodiment of the present invention, the material of the two conductive layers may be selected from one of copper (Cu), silver (Ag), chromium (Cr), nickel (Ni), titanium (Ti), or a combination thereof.
In a preferred embodiment of the present invention, the two conductive layers are titanium nitride (TiN) and TiN oxide (SnO)2) Indium oxide (In)2O3) One of zinc oxide (ZnO), Indium Tin Oxide (ITO) film or their combination.
The invention has the advantages that the purposes of increasing the power of the sound output by the film loudspeaker and improving the sound quality can be achieved.
For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.
Drawings
Fig. 1 is a schematic perspective assembly diagram of a stereo film speaker according to the present invention.
Fig. 2 is a schematic exploded perspective view of a stereo film speaker according to the present invention.
Fig. 3 is a schematic cross-sectional structure diagram of a stereo film speaker according to the present invention.
Fig. 4 is an enlarged partial cross-sectional view of a film sound generating module for use with the present invention.
Fig. 5 is a perspective view of a first variation of the stereo film speaker of the present invention.
Fig. 6 is a perspective view of a second variation of the stereo film speaker of the present invention.
Fig. 7 is a perspective view of another variation of the stereo film speaker of the present invention.
Detailed Description
[ first embodiment ]
As shown in fig. 1 to 4, the stereo film speaker 1 of the present invention mainly includes: a film sounding component 10, two conductive components 30, and two supporting frames 20.
Wherein, film sound production subassembly 10 is a sound production subassembly that adopts polymer piezoelectric film to make, as shown in fig. 4, film sound production subassembly 10 has a piezoelectric film 101, piezoelectric film 101 has relative top surface and downside, and the laminating is provided with a conducting layer 102 respectively on piezoelectric film 101's top surface and downside.
The piezoelectric film 101 is a film or a sheet made of a polymer material with piezoelectric properties, and the material of the piezoelectric film 101 is preferably polyvinylidene fluoride (PVDF) or other polymer materials capable of generating piezoelectric effect, such as: nylon, terylene, polyvinyl chloride and other materials. The thickness of the piezoelectric film 101 is preferably less than 0.3 mm. The two conductive layers 102 are disposed on the upper and lower sides of the piezoelectric film 101 by evaporation, sputtering, deposition, electroplating, chemical plating or coating, and the conductive layers 102 substantially cover most of the upper and lower sides of the piezoelectric film 101. The two conductive layers 102 may be conductive metal material layers, such as: metal materials such as copper (Cu), silver (Ag), chromium (Cr), nickel (Ni) and titanium (Ti)One or a combination thereof, or a conductive metal oxide film, such as: titanium nitride (TiN) and TiN oxide (SnO)2) Indium oxide (In)2O3) One of zinc oxide (ZnO), Indium Tin Oxide (ITO) film or their combination.
As shown in fig. 1 and 2, the range of the film sound-generating assembly 10 of the present invention that can generate sound is defined as a working area, and the working area of the film sound-generating assembly 10 can be divided into two or more area units 11. The film sound-generating assembly 10 is bent at the intersection of every two adjacent area units 11 in the area units 11 to form a plurality of bending lines 12 at the intersection of every two adjacent area units 11, and an included angle θ is formed between every two adjacent area units 11.
The film sounding assembly 10 of the present invention is manufactured by forming the conductive layer 102 on the two sides of the diaphragm-shaped piezoelectric film 101 by evaporation, sputtering, deposition, electroplating, chemical plating, coating, etc. to form a film substrate, and then forming the bending line 12 on the film substrate by bending, rolling, etc. the film sounding assembly 10 of the present invention is formed. Depending on the processing method, the formed film sound emitting component 10 can be a non-extensible film or an extensible film. The non-extensible film type film sound generating unit 10 means that the material of the film sound generating unit 10 at the position other than the position of the bending line 12 is not subjected to the deformation of stretching or extension in the process of forming the bending line 12, and therefore, the bending line 12 is formed on the film sound generating unit 10 simply by bending, indentation or the like. The film sound generating assembly 10 in the form of an extended film is processed by forming the bending line 12 on the film sound generating assembly 10 by stretching or stretching the film sound generating assembly 10 in a uniaxial direction or a biaxial direction during the forming process of the bending line 12.
In particular, the included angle θ between every two adjacent units 11 of the film sound production assembly 10 of the present invention is between 179 degrees and 90 degrees, and in a preferred embodiment, the included angle θ is between 160 degrees and 120 degrees. And the bending line 12 at the connection position of every two adjacent area units 11 forms an arc bend r, and the curvature radius of the arc bend r is preferably larger than one half of the thickness of the film sound-producing component 10. Through experiments, the film sound generating assembly 10 of the present invention can have preferable sound effect and sound quality when the included angle θ and the radius of the arc bend r meet the above conditions.
As shown in fig. 3, the two conductive layers 102 of the film sound generating assembly 10 are respectively connected to an audio source signal 40 through the two conductive elements 30. In this embodiment, the two conductive elements 30 may be flexible printed circuit boards, metal sheets, or polymer sheet materials with conductors plated on the surfaces thereof. Two ends of the two conductive elements 30 are respectively provided with a circuit contact 31. The circuit contacts 31 of one end of the conductive element 30 are respectively contacted with the two conductive layers 102, and the circuit contact 31 of the other end of the conductive element 30 is connected with the audio source signal 40.
When the voltage of the sound source signal 40 is conducted to the two conductive layers 102 through the conductive element 30, the two conductive layers 102 can be charged with different polarities, and the upper and lower sides of the piezoelectric film 101 are covered by the conductive layers 102, so that when the two conductive layers 102 are charged with the voltage, the piezoelectric film 101 can vibrate due to the inverse piezoelectric effect, and the input voltage signal of the sound source signal 40 is converted into an audio signal with air vibration and output.
As shown in fig. 3 and 4, the film sound-generating assembly 10 of the present invention forms a three-dimensional structure with a concave surface due to the included angle between every two adjacent area units 11, and the concave surface of the film sound-generating assembly 10 is designed to face the sound-emitting direction of the sound field output by the film sound-generating assembly 10. Since the film sound-generating assembly 10 is divided into a plurality of adjacent area units 11, and an included angle is formed between every two adjacent area units 11, so that every two adjacent area units 11 are mutually inclined, when the film sound-generating assembly 10 is driven by the voltage of the sound source signal 40 to generate vibration, the directions of the sound fields generated by each area unit 11 are also mutually staggered, thereby improving the sound pressure of the sound field output by the film sound-generating assembly 10, and improving the sound-generating efficiency.
In addition, the film sound-generating component 10 forms a plurality of bending lines 12 at the boundary of every two adjacent area units 11, so that the film sound-generating component 10 forms a truss structure capable of enhancing the bending strength at the position of the bending lines 12, and therefore the film sound-generating component 10 can bear a more severe vibration amplitude, so that the output power of the film sound-generating component 10 of the present invention can be improved, and the frequency range of the output sound field of the film loudspeaker 1 of the present invention is expanded, so as to achieve the purpose of improving the sound quality.
In addition, the present invention can further provide two supporting frames 20 on the upper side and the lower side of the edge of the film sound generating component 10, in this embodiment, the two supporting frames 20 are annular and are clamped between the two opposite sides of the edge of the film sound generating component 10. The supporting frame body 20 is made of plastic, metal, paperboard or other composite materials, and the bending strength of the supporting frame body 20 is greater than that of the film sounding component 10, so that the bending strength of the edge of the film sounding component 10 can be enhanced, and the sound output power and the sound quality of the film loudspeaker 1 can be further improved.
Specifically, in the present embodiment, the outline of the edge of the film sound-generating assembly 10 is circular, the film sound-generating assembly 10 is divided into four area units 11, and the bending lines 12 are crisscross disposed on the film sound-generating assembly 10, however, in other embodiments of the present invention, the outline of the film sound-generating assembly, the number of the area units 11, and the arrangement of the bending lines 12 are not limited to those disclosed in the present embodiment.
For example, in the embodiment shown in fig. 5, the outline of the film sounding assembly 10 is rectangular, and the supporting frame 20 is also designed to be rectangular ring-shaped. For example, in the embodiment shown in fig. 6, the outline shapes of the film sound-generating module 10 and the supporting frame 20 are polygonal geometric shapes, and the bending lines 12 are arranged on the film sound-generating module 10 in a manner of being distributed along the diagonal direction of the geometric outline shape of the film sound-generating module 10. In the embodiment shown in fig. 7, the film sound-generating assembly 10 and the supporting frame 20 have polygonal geometric outlines, and the sound-generating region of the film sound-generating assembly 10 is divided into a plurality of region units 11 surrounding the periphery of the film sound-generating assembly 10 and a region unit 11a located at the middle of the film sound-generating assembly 10, and a plurality of bending lines 12 are formed at the intersection of each region unit 11, and a bending line 12a is formed at the intersection of the region unit 11a located at the center and the region unit 11 located at the periphery.
In summary, the present invention has the advantages of increasing the sound pressure and output power of the sound field output by the film speaker 1, and expanding the frequency range of the output sound field, thereby achieving the purpose of increasing the output sound power of the film speaker and improving the sound quality.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, so that equivalent technical changes made by using the contents of the present specification and the drawings are included in the scope of the present invention.
Claims (11)
1. A stereoscopic film speaker, comprising:
the film sounding assembly comprises a piezoelectric film and two conducting layers, the piezoelectric film is provided with an upper side face and a lower side face which are opposite, the two conducting layers are attached to the upper side face and the lower side face of the piezoelectric film, and the two conducting layers are electrically connected with a sound source signal;
wherein, the scope definition that film sound production subassembly can sound is the work area, film sound production subassembly's work area separates for a plurality of regional units, film sound production subassembly is in a plurality of every two are adjacent in the middle of the regional unit handing-over department is buckled mutually, and forms a plurality of bend lines, and makes every two adjacent have an contained angle between the regional unit, and make film sound production subassembly forms the structure that has the concave surface, just the concave surface orientation the play sound direction in film sound production subassembly output sound field.
2. The stereoscopic film speaker as claimed in claim 1, wherein two supporting frames are further disposed around the periphery of the film sound-generating assembly, the two supporting frames surround the periphery of the film sound-generating assembly and are oppositely clamped on two opposite sides of the edge of the film sound-generating assembly, and the bending strength of the supporting frames is greater than that of the film sound-generating assembly for reinforcing the bending strength of the surrounding area of the film sound-generating assembly.
3. The stereoscopic film speaker as claimed in claim 2, wherein an angle between each two adjacent area units is between 179 degrees and 90 degrees.
4. The stereoscopic film speaker as claimed in claim 3, wherein an angle between each two adjacent area units is between 160 degrees and 120 degrees.
5. The stereofilm speaker of claim 4, wherein said bending line at the junction of every two adjacent said area units forms a circular arc corner having a radius of curvature greater than one-half of the thickness of said film sound-generating unit.
6. The stereoscopic film speaker of claim 5, wherein the piezoelectric film is a polyvinylidene fluoride (PVDF) film.
7. The stereoscopic film speaker as claimed in claim 6, wherein the two conductive layers are metal films or metal oxide films.
8. The spatial film speaker as claimed in claim 7, wherein the two conductive layers are made of one or a combination of copper (Cu), silver (Ag), chromium (Cr), nickel (Ni), and titanium (Ti).
9. As claimed in claim 7The three-dimensional film loudspeaker is characterized in that the two conducting layers are made of titanium nitride (TiN) and TiN oxide (SnO)2) Indium oxide (In)2O3) One of zinc oxide (ZnO), Indium Tin Oxide (ITO) film or their combination.
10. The stereoscopic film speaker of claim 7, wherein the film sound generating component is a stretched film formed by stretching.
11. The stereoscopic film speaker of claim 7 wherein the film sound generating component is a non-stretched film that has not been stretched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910079988.8A CN111491238A (en) | 2019-01-28 | 2019-01-28 | Three-dimensional film loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910079988.8A CN111491238A (en) | 2019-01-28 | 2019-01-28 | Three-dimensional film loudspeaker |
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| Publication Number | Publication Date |
|---|---|
| CN111491238A true CN111491238A (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910079988.8A Pending CN111491238A (en) | 2019-01-28 | 2019-01-28 | Three-dimensional film loudspeaker |
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| CN (1) | CN111491238A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE607515C (en) * | 1929-03-13 | 1934-12-29 | Siemens Brothers & Co Ltd | Flat membrane made of non-magnetic, malleable, malleable material |
| FR2653631A1 (en) * | 1989-10-19 | 1991-04-26 | Fabricanti Luc | Membrane for a loudspeaker, method for producing such a membrane, and loudspeaker fitted with such a membrane |
| CN101626537A (en) * | 2008-01-18 | 2010-01-13 | 财团法人工业技术研究院 | Flexible piezoelectric sound-generating devices |
| CN201594907U (en) * | 2009-10-26 | 2010-09-29 | 北京七九七华音电子有限责任公司 | Loudspeaker cone and loudspeaker |
| CN106269451A (en) * | 2011-02-15 | 2017-01-04 | 富士胶卷迪马蒂克斯股份有限公司 | Use the piezoelectric transducer of micro-dome array |
| CN106416296A (en) * | 2014-08-01 | 2017-02-15 | 雅马哈株式会社 | Electroacoustic transducer |
| TWM558503U (en) * | 2017-11-10 | 2018-04-11 | Arima Acoustic Eng Corporation | Audio device |
| CN109195076A (en) * | 2018-08-07 | 2019-01-11 | 张永春 | The diaphragm of loudspeaker and loudspeaker |
| CN209517490U (en) * | 2019-01-28 | 2019-10-18 | 华一声学股份有限公司 | Three-dimensional film loudspeaker |
-
2019
- 2019-01-28 CN CN201910079988.8A patent/CN111491238A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE607515C (en) * | 1929-03-13 | 1934-12-29 | Siemens Brothers & Co Ltd | Flat membrane made of non-magnetic, malleable, malleable material |
| FR2653631A1 (en) * | 1989-10-19 | 1991-04-26 | Fabricanti Luc | Membrane for a loudspeaker, method for producing such a membrane, and loudspeaker fitted with such a membrane |
| CN101626537A (en) * | 2008-01-18 | 2010-01-13 | 财团法人工业技术研究院 | Flexible piezoelectric sound-generating devices |
| CN201594907U (en) * | 2009-10-26 | 2010-09-29 | 北京七九七华音电子有限责任公司 | Loudspeaker cone and loudspeaker |
| CN106269451A (en) * | 2011-02-15 | 2017-01-04 | 富士胶卷迪马蒂克斯股份有限公司 | Use the piezoelectric transducer of micro-dome array |
| CN106416296A (en) * | 2014-08-01 | 2017-02-15 | 雅马哈株式会社 | Electroacoustic transducer |
| TWM558503U (en) * | 2017-11-10 | 2018-04-11 | Arima Acoustic Eng Corporation | Audio device |
| CN109195076A (en) * | 2018-08-07 | 2019-01-11 | 张永春 | The diaphragm of loudspeaker and loudspeaker |
| CN209517490U (en) * | 2019-01-28 | 2019-10-18 | 华一声学股份有限公司 | Three-dimensional film loudspeaker |
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