CN111225328B - Electrostatic loudspeaker diaphragm and electrostatic loudspeaker - Google Patents
Electrostatic loudspeaker diaphragm and electrostatic loudspeaker Download PDFInfo
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- CN111225328B CN111225328B CN202010074004.XA CN202010074004A CN111225328B CN 111225328 B CN111225328 B CN 111225328B CN 202010074004 A CN202010074004 A CN 202010074004A CN 111225328 B CN111225328 B CN 111225328B
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- layer
- diaphragm
- nanoparticles
- electrostatic loudspeaker
- carbon nano
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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
- H04R19/02—Loudspeakers
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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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
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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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
- H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/023—Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/025—Diaphragms comprising polymeric materials
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/027—Diaphragms comprising metallic materials
Abstract
The invention provides a vibrating diaphragm of an electrostatic loudspeaker and the electrostatic loudspeaker, wherein the vibrating diaphragm comprises a vibrating diaphragm supporting layer and conducting layers positioned on two sides of the vibrating diaphragm supporting layer, and the conducting layers are nanoparticle conducting layers; the nanoparticles comprise metal nanoparticles or carbon nanoparticles; the nanoparticles are arranged in an electrode pattern; the metal nanoparticles comprise at least one of silver, gold, nickel, copper and zinc; the carbon nano-particles comprise at least one of carbon nano-tubes, carbon nano-spheres and carbon nano-wires; the invention utilizes the nano conductive particles to prepare the conductive layer, thereby reducing the quality of the vibrating diaphragm and improving the sensitivity of the vibrating diaphragm.
Description
Technical Field
The invention relates to the field of audio digital-to-analog conversion, in particular to a vibrating diaphragm of an electrostatic loudspeaker and the electrostatic loudspeaker.
Background
With the improvement of high power, waterproof and high sound quality requirements, the loudspeaker diaphragm adopting the plastic film layer, the thermoplastic polyurethane elastomer and the damping film composite structure has poor comprehensive performance, and poor listening sound is easily caused. The silicon rubber diaphragm has relatively low elastic modulus or hardness, so that the same F is satisfied0On the premise of the requirement of (resonant frequency), the thickness of the vibrating diaphragm needs to be increased, so that the margin of a vibrating space is reduced, the mass of a vibrating system is heavier, and the sensitivity is lower.
Secondly, through modes such as spin coating, spraying coating have metal conducting structure on the current static speaker vibrating diaphragm, it is big to have a vibration system quality, and vibration sensitivity is low to influence tone quality.
Disclosure of Invention
The invention aims to provide a vibrating diaphragm of an electrostatic loudspeaker and the electrostatic loudspeaker aiming at the defects of the prior art, and solves the problem of low sensitivity caused by large mass of a vibrating system in the prior art.
In order to achieve the above object, the present invention provides an electrostatic loudspeaker diaphragm, which includes a diaphragm supporting layer and conductive layers located on two sides of the diaphragm supporting layer, wherein the conductive layers are nanoparticle conductive layers.
Wherein, the vibrating diaphragm supporting layer is of a single-layer structure or a composite layer structure; the single-layer vibrating diaphragm supporting layer is an elastic polyester film layer; the composite layer diaphragm supporting layer is composed of at least two elastic polyester film layers and an adhesive layer positioned between the elastic polyester film layers; the elastic polyester film layer is a copolymer of a polymer of dibasic acid and dihydric alcohol and aliphatic polyester; the polymerization degree of the polymer of the dibasic acid and the dihydric alcohol is more than or equal to 2, and the mass percentage is 30-65%; the molecular mass of the aliphatic polyester is 600-6000; the nanoparticles comprise metal nanoparticles or carbon nanoparticles; the nanoparticles are arranged in an electrode pattern; the metal nanoparticles comprise at least one of silver, gold, nickel, copper and zinc; the carbon nanoparticles include at least one of carbon nanotubes, carbon nanospheres, and carbon nanowires.
In addition, the invention also provides an electrostatic loudspeaker which comprises any one of the vibrating diaphragms and stator pole plates which are positioned on two sides of the vibrating diaphragm and arranged in parallel to the vibrating diaphragm.
According to the scheme of the invention, the elastic polyester film layer is prepared from the copolymer of the polymer of the dibasic acid and the dihydric alcohol and the aliphatic polyester and is used as the diaphragm preparation layer, and the conductive layer is prepared from the nano conductive particles, so that the mass of the diaphragm is reduced, and the sensitivity of the diaphragm is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 is a schematic structural diagram of an electrostatic loudspeaker diaphragm according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an electrostatic loudspeaker diaphragm according to another embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an electrostatic speaker according to an embodiment of the invention.
Detailed Description
The technical solutions in the present specification are described in detail with reference to the drawings and the specific embodiments, and it should be understood that the specific features in the embodiments and the examples are not intended to limit the technical solutions in the present specification, and the technical features in the embodiments and the examples in the present specification may be combined with each other without conflict.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Example 1
As shown in fig. 1, an embodiment of the present invention provides an electrostatic loudspeaker diaphragm 100, which includes a diaphragm support layer 110 and conductive layers 120 located on two sides of the diaphragm support layer.
The diaphragm support layer 110 is a single thermoplastic elastic polyester film layer. The elastic polyester film layer is a copolymer of a polymer of dibasic acid and dihydric alcohol and aliphatic polyester. The dibasic acid is selected from one or more of isophthalic acid, terephthalic acid, diphenic acid and naphthalenedicarboxylic acid, and the dihydric alcohol is selected from one or more of ethylene glycol, propylene glycol, butanediol, pentanediol and hexanediol. The polymerization degree of the polymer of the dibasic acid and the dihydric alcohol is more than or equal to 2, and the mass percentage is 30-65%. The molecular mass of the aliphatic polyester is 600-6000. The Young modulus of the thermoplastic polyester elastomer film layer is 200-700MPa, and the elongation at break is more than or equal to 300 percent.
The conductive layer 120 is composed of conductive nanoparticles including metal nanoparticles or carbon nanoparticles. The carbon nanoparticles or metal nanoparticles are randomly oriented in the conductive layer 120, and may also be selectively oriented. The nano particles are arranged into an electrode pattern by a coating and self-assembly growth mode. The carbon nanoparticles or the metal nanoparticles form symmetrical patterns on two sides of the conductive layer 120, and the patterns have geometric symmetry, so that the balance can be maintained when the diaphragm vibrates. The metal nanoparticles include at least one of silver, gold, nickel, copper, and zinc. In order for the metal nanoparticles to form electrical interconnections in the conductive layer 120. Thus, the metal nanoparticles may overlap each other, and/or the metal nanoparticles may be at least partially suspendedAnd/or in a matrix material (such as, but not limited to, a conductive polymer) having sufficient conductivity such that the metal nanoparticles are electrically interconnected. The carbon nanoparticles include at least one of carbon nanotubes, carbon nanospheres, and carbon nanowires. Thickness T of carbon nanoparticles on conductive layer 1201Less than their length L1. For carbon nanotubes, the carbon nanotubes may include single-walled carbon nanotubes and/or multi-walled carbon nanotubes. Furthermore, the carbon nanotubes may be pristine, functionalized, and/or filled with additional materials, such as, but not limited to, metals, to form "nanowires" encapsulated in the carbon nanotube lumens.
Example 2
As shown in fig. 2, an embodiment of the invention provides an electrostatic loudspeaker diaphragm 200, which includes a diaphragm support layer 210 and conductive layers 220 disposed on two sides of the diaphragm support layer.
The diaphragm support layer 210 is a composite layer structure. The composite membrane support layer is composed of at least two thermoplastic elastic polyester film layers 211 and an adhesive layer 212 positioned between the elastic polyester film layers. The elastic polyester film layer is a copolymer of a polymer of dibasic acid and dihydric alcohol and aliphatic polyester. The dibasic acid is selected from one or more of isophthalic acid, terephthalic acid, diphenic acid and naphthalenedicarboxylic acid, and the dihydric alcohol is selected from one or more of ethylene glycol, propylene glycol, butanediol, pentanediol and hexanediol. The polymerization degree of the polymer of the dibasic acid and the dihydric alcohol is more than or equal to 2, and the mass percentage is 30-65%. The molecular mass of the aliphatic polyester is 600-6000. The Young modulus of the thermoplastic polyester elastomer film layer is 200-700MPa, and the elongation at break is more than or equal to 300 percent.
The conductive layer 220 is composed of conductive nanoparticles including metal nanoparticles or carbon nanoparticles. The carbon nanoparticles or metal nanoparticles are randomly oriented in the conductive layer 220, and may alternatively be directionally oriented. The nano particles are arranged into an electrode pattern by a coating and self-assembly growth mode. The patterns formed on the two sides of the conductive layer 220 by the carbon nanoparticles or the metal nanoparticles are symmetrical, and the patterns have geometric symmetry, so that the vibrating diaphragm can keep balance when vibrating. The metal nanoparticles comprise at least one of silver, gold, nickel, copper and zincAnd (4) seed preparation. In order for the metal nanoparticles to form electrical interconnections in the conductive layer 220. Thus, the metal nanoparticles may overlap each other, and/or the metal nanoparticles may be at least partially suspended and/or contained in a matrix material (such as, but not limited to, a conductive polymer) having sufficient conductivity such that the metal nanoparticles achieve electrical interconnection. The carbon nanoparticles include at least one of carbon nanotubes, carbon nanospheres, and carbon nanowires. Thickness T of carbon nanoparticles on conductive layer 2201Less than their length L1. For carbon nanotubes, the carbon nanotubes may include single-walled carbon nanotubes and/or multi-walled carbon nanotubes. Furthermore, the carbon nanotubes may be pristine, functionalized, and/or filled with additional materials, such as, but not limited to, metals, to form "nanowires" encapsulated in the carbon nanotube lumens.
Example 3
As shown in fig. 3, an electrostatic speaker 300 according to an embodiment of the present invention includes two electrode plates 310 and a diaphragm 320, wherein the diaphragm 320 is sandwiched between the two electrode plates 310. The audio signal output by the power amplifier is boosted by 100-200 times through the step-up transformer, and then input to the two electrode plates 310, and the 3-5 KV high-voltage diaphragm 320 is injected to vibrate between the electrode plates 310 to make a sound.
The diaphragm 320 includes a diaphragm support layer and conductive layers on both sides of the diaphragm support layer. The vibrating diaphragm supporting layer is a single-layer thermoplastic elastic polyester film layer or a composite layer structure. The composite layer diaphragm supporting layer is composed of at least two thermoplastic elastic polyester film layers and an adhesive layer positioned between the elastic polyester film layers. The elastic polyester film layer is a copolymer of a polymer of dibasic acid and dihydric alcohol and aliphatic polyester. The dibasic acid is selected from one or more of isophthalic acid, terephthalic acid, diphenic acid and naphthalenedicarboxylic acid, and the dihydric alcohol is selected from one or more of ethylene glycol, propylene glycol, butanediol, pentanediol and hexanediol. The polymerization degree of the polymer of the dibasic acid and the dihydric alcohol is more than or equal to 2, and the mass percentage is 30-65%. The molecular mass of the aliphatic polyester is 600-6000. The Young modulus of the thermoplastic polyester elastomer film layer is 200-700MPa, and the elongation at break is more than or equal to 300 percent.
The conductive layer is composed of conductive nanoparticles, including metal nanoparticles or carbon nanoparticles. The carbon nanoparticles or metal nanoparticles are randomly oriented in the conductive layer, and may optionally be non-randomly oriented. The nanoparticles are arranged in an electrode pattern. The patterns formed on the two sides of the conductive layer by the carbon nano particles or the metal nano particles are symmetrical, and the patterns have geometric symmetry, so that balance can be kept when the vibrating diaphragm vibrates. The metal nanoparticles include at least one of silver, gold, nickel, copper, and zinc. In order for the metal nanoparticles to form electrical interconnections in the conductive layer. Thus, the metal nanoparticles may overlap each other, and/or the metal nanoparticles may be at least partially suspended and/or contained in a matrix material (such as, but not limited to, a conductive polymer) having sufficient conductivity such that the metal nanoparticles achieve electrical interconnection. The carbon nanoparticles include at least one of carbon nanotubes, carbon nanospheres, and carbon nanowires. Thickness T of carbon nanoparticles on the conductive layer1Substantially less than their length L1. For carbon nanotubes, the carbon nanotubes may include single-walled carbon nanotubes and/or multi-walled carbon nanotubes. Furthermore, the carbon nanotubes may be pristine, functionalized, and/or filled with additional materials, such as, but not limited to, metals, to form "nanowires" encapsulated in the carbon nanotube lumens.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all changes and modifications that fall within the scope of the specification. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. An electrostatic loudspeaker diaphragm, characterized in that: the vibration film comprises a vibration film supporting layer and conducting layers positioned on two sides of the vibration film supporting layer, wherein the conducting layers are nanoparticle conducting layers; the vibrating diaphragm supporting layer is of a single-layer structure or a composite layer structure;
the single-layer vibrating diaphragm supporting layer is a thermoplastic polyester elastomer film layer; the composite layer diaphragm supporting layer is composed of at least two elastic polyester film layers and a bonding layer positioned between the at least two elastic polyester film layers;
the elastic polyester film layer is a copolymer of a polymer of dibasic acid and dihydric alcohol and aliphatic polyester;
the polymerization degree of the polymer of the dibasic acid and the dihydric alcohol is more than or equal to 2, and the mass percentage is 30-65%; the dibasic acid is selected from one or more of isophthalic acid, terephthalic acid, biphenyldicarboxylic acid and naphthalenedicarboxylic acid, and the dihydric alcohol is selected from one or more of ethylene glycol, propylene glycol, butanediol, pentanediol and hexanediol; the molecular mass of the aliphatic polyester is 600-6000; the Young modulus of the thermoplastic polyester elastomer film layer is 200-700MPa, and the elongation at break is more than or equal to 300%.
2. The electrostatic loudspeaker diaphragm of claim 1 wherein: the nanoparticles include metal nanoparticles or carbon nanoparticles.
3. The electrostatic loudspeaker diaphragm of claim 2 wherein: the nanoparticles are arranged in an electrode pattern; the carbon nano-particles or the metal nano-particles are randomly oriented or directionally oriented in the conducting layer and are arranged into an electrode pattern in a coating and self-assembly growth mode, the patterns formed by the carbon nano-particles or the metal nano-particles on two sides of the conducting layer are symmetrical, and the patterns have geometric symmetry so as to be beneficial to keeping balance when the vibrating diaphragm vibrates.
4. The electrostatic loudspeaker diaphragm of claim 3 wherein: the metal nanoparticles include at least one of silver, gold, nickel, copper, and zinc.
5. The electrostatic loudspeaker diaphragm of claim 4 wherein: the carbon nano-particles comprise at least one of carbon nano-tubes, carbon nano-spheres and carbon nano-wires.
6. An electrostatic speaker comprising the diaphragm according to any one of claims 1 to 5 and stator plates provided on both sides of the diaphragm and arranged parallel to the diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010074004.XA CN111225328B (en) | 2020-01-22 | 2020-01-22 | Electrostatic loudspeaker diaphragm and electrostatic loudspeaker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010074004.XA CN111225328B (en) | 2020-01-22 | 2020-01-22 | Electrostatic loudspeaker diaphragm and electrostatic loudspeaker |
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| Publication Number | Publication Date |
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| CN111225328A CN111225328A (en) | 2020-06-02 |
| CN111225328B true CN111225328B (en) | 2021-01-29 |
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| CN202010074004.XA Active CN111225328B (en) | 2020-01-22 | 2020-01-22 | Electrostatic loudspeaker diaphragm and electrostatic loudspeaker |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6188772B1 (en) * | 1998-01-07 | 2001-02-13 | American Technology Corporation | Electrostatic speaker with foam stator |
| CN1668712A (en) * | 2002-06-13 | 2005-09-14 | 耐诺泡德斯工业有限公司 | A method for the production of conductive and transparent nano-coatings and nano-inks and nano-powder coatings and inks produced thereby |
| CN101356852A (en) * | 2006-01-03 | 2009-01-28 | 天籁之音国际有限公司 | Electrostatic loudspeaker systems and methods |
| CN101729971A (en) * | 2008-10-31 | 2010-06-09 | 宏达国际电子股份有限公司 | Method for manufacturing electret vibrating membrane |
| CN102547534A (en) * | 2010-12-30 | 2012-07-04 | 志丰电子股份有限公司 | Film electret, method for making film electret and sound playing device thereof |
| CN105681989A (en) * | 2016-02-26 | 2016-06-15 | 无锡吉仓纳米材料科技有限公司 | Composite diaphragm electrostatic loudspeaker of ultrathin graphite film and carbon tube film |
| CN109743671A (en) * | 2019-01-19 | 2019-05-10 | 深圳市国创珈伟石墨烯科技有限公司 | A kind of novel graphene combined type electrostatic diaphragm of loudspeaker and preparation method thereof |
| CN110430514A (en) * | 2019-08-10 | 2019-11-08 | 宗阳阳 | A kind of vibrating diaphragm coating, diaphragm of loudspeaker and preparation method thereof, electrostatic loudspeaker |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0505517D0 (en) * | 2005-03-17 | 2005-04-27 | Dupont Teijin Films Us Ltd | Coated polymeric substrates |
| CN108551642B (en) * | 2018-06-15 | 2020-09-22 | 歌尔股份有限公司 | Loudspeaker diaphragm and loudspeaker |
-
2020
- 2020-01-22 CN CN202010074004.XA patent/CN111225328B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6188772B1 (en) * | 1998-01-07 | 2001-02-13 | American Technology Corporation | Electrostatic speaker with foam stator |
| CN1668712A (en) * | 2002-06-13 | 2005-09-14 | 耐诺泡德斯工业有限公司 | A method for the production of conductive and transparent nano-coatings and nano-inks and nano-powder coatings and inks produced thereby |
| CN101356852A (en) * | 2006-01-03 | 2009-01-28 | 天籁之音国际有限公司 | Electrostatic loudspeaker systems and methods |
| CN101729971A (en) * | 2008-10-31 | 2010-06-09 | 宏达国际电子股份有限公司 | Method for manufacturing electret vibrating membrane |
| CN102547534A (en) * | 2010-12-30 | 2012-07-04 | 志丰电子股份有限公司 | Film electret, method for making film electret and sound playing device thereof |
| CN105681989A (en) * | 2016-02-26 | 2016-06-15 | 无锡吉仓纳米材料科技有限公司 | Composite diaphragm electrostatic loudspeaker of ultrathin graphite film and carbon tube film |
| CN109743671A (en) * | 2019-01-19 | 2019-05-10 | 深圳市国创珈伟石墨烯科技有限公司 | A kind of novel graphene combined type electrostatic diaphragm of loudspeaker and preparation method thereof |
| CN110430514A (en) * | 2019-08-10 | 2019-11-08 | 宗阳阳 | A kind of vibrating diaphragm coating, diaphragm of loudspeaker and preparation method thereof, electrostatic loudspeaker |
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| CN111225328A (en) | 2020-06-02 |
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