WO2015064871A1 - Dispositif de génération de son - Google Patents

Dispositif de génération de son Download PDF

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Publication number
WO2015064871A1
WO2015064871A1 PCT/KR2014/004417 KR2014004417W WO2015064871A1 WO 2015064871 A1 WO2015064871 A1 WO 2015064871A1 KR 2014004417 W KR2014004417 W KR 2014004417W WO 2015064871 A1 WO2015064871 A1 WO 2015064871A1
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WO
WIPO (PCT)
Prior art keywords
support frame
vibrating membrane
magnetic field
membrane
graphene layer
Prior art date
Application number
PCT/KR2014/004417
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English (en)
Korean (ko)
Inventor
이영주
이정수
Original Assignee
엘지전자 주식회사
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Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2015064871A1 publication Critical patent/WO2015064871A1/fr

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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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • 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

Definitions

  • the present invention relates to an acoustic generator, and more particularly, to an acoustic generator having a graphene diaphragm.
  • a sound generating device such as a speaker is a device for converting an electrical signal into a voice signal, and has been applied to various acoustic devices such as earphones, mobile phones, MP3 players, and the like.
  • Such a speaker uses various driving methods, such as a voice coil driving method, a balanced armature driving method, an electrostatic driving method, and the like.
  • the speaker using the voice coil drive system is a winding coil and a permanent magnet to drive the vibrating membrane, and while the price is low, there is a problem that the high frequency characteristics are not good.
  • the speaker using the balanced armature driving method is a method of driving the vibrating membrane by a displacement proportional to the magnetization of the balanced armature.
  • the speaker can be miniaturized, but there is a problem that the high frequency characteristics are poor and the price is relatively expensive.
  • the speaker using the electrostatic driving method has a problem that the high frequency characteristic is good as the method of driving the vibrating membrane by the electric field change, while the low frequency characteristic is not good, and the speaker is driven at a high voltage of about 100 V or more.
  • 1 is a cross-sectional view showing a speaker using an electrostatic driving method.
  • the speaker may be composed of the first and second fixed electrodes 1a and 1b and the vibrating membrane 2, and a high alternating current is applied to the first and second fixed electrodes 1a and 1b.
  • a voltage is applied, the vibrating membrane 2 vibrates due to electric force between charges.
  • the 1st, 2nd fixed electrode 1a, 1b can be arrange
  • the vibrating membrane 2 is coated with a metal on a thin film of plastic, and may have a thickness of about 10-20 ⁇ m.
  • the vibrating membrane 2 is formed by coating a metal on a thin film of plastic.
  • the vibrating membrane 2 has a thickness of about 10-20 ⁇ m, and is very thin, so that a delicate sound range, particularly a high frequency sound range, can be reproduced well.
  • the vibration membrane and the driving unit for supporting the periphery of the vibration membrane generating a magnetic field proportional to the input current, vibrating the vibration membrane, the vibration membrane, It includes a graphene layer
  • the bending direction can be determined according to the magnetic field direction of the drive unit.
  • the vibrating membrane may include a substrate and a graphene layer disposed on the substrate.
  • the graphene layer may be a graphene single layer or a graphene plural layer.
  • an organic layer may be formed between the substrate and the graphene layer.
  • one or more organic layers and one or more graphene layers may be alternately formed to form an organic-inorganic composite layer.
  • a protective film in contact with at least one surface of the graphene layer and the substrate may be formed.
  • the driving unit may include a first support frame supporting the upper surface of the vibration membrane, a second support frame supporting the lower surface of the vibration membrane, and a conductive coil surrounding the outer surfaces of the first and second support frames. have.
  • the first support frame is disposed along the peripheral region of the upper surface of the vibrating membrane, and includes a first through hole exposing the central region of the upper surface of the vibrating membrane
  • the second supporting frame includes a peripheral portion of the lower surface of the vibrating membrane.
  • a second through hole may be disposed along the region and expose a central region of the lower surface of the vibrating membrane.
  • the inner surfaces of the first and second support frames may be inclined with respect to the surface of the vibrating membrane, and the angle between the inner surfaces of the first and second supporting frames and the surface of the vibrating membrane may be an obtuse angle.
  • the number of times of winding the outer side of the first support frame and the number of times of winding the outer side of the second support frame may be the same as that of the conductive coil.
  • the driving unit includes a first support frame for supporting the upper surface of the vibration membrane, a second support frame for supporting the lower surface of the vibration membrane, a first stator armature disposed on the first support frame, and a second It may include a second fixed armature disposed on the support frame, a magnetic core structure connecting one side of the first fixed armature and the second fixed armature, and a conductive coil surrounding the outer surface of the magnetic core structure.
  • the first fixed armature has a peripheral region in contact with the first support frame, the central region is disposed at a first distance from the upper surface of the vibrating membrane, and the second fixed armature has a peripheral region in contact with the second support frame.
  • the central region may be disposed apart from the lower surface of the vibrating membrane at a second interval.
  • a plurality of holes may be formed in the central region of the first fixed armature and the central region of the second fixed armature.
  • the conductive coils may be arranged to be spaced apart from the outer surfaces of the first and second support frames at a predetermined interval.
  • the vibrating membrane may generate an internal magnetic field by an external magnetic field generated from the driver, and the direction of the internal magnetic field of the vibrating membrane may be opposite to the direction of the external magnetic field generated by the driver.
  • the graphene acoustic vibration membrane by using the graphene acoustic vibration membrane, it is possible to minimize the thickness of the vibration membrane, and by driving the graphene acoustic vibration membrane in an electromagnetic drive method, there is an advantage that can be driven at a low voltage.
  • the present invention can realize the best sound quality while minimizing distortion of sound quality with a low driving voltage.
  • 1 is a cross-sectional view showing a speaker using an electrostatic driving method.
  • FIG. 2 is a view schematically showing a sound generating apparatus according to the present invention.
  • 3 and 4 are views illustrating a driving principle of the vibrating membrane of FIG. 2.
  • 5 to 9 are cross-sectional views showing the structure of the vibration membrane of FIG.
  • FIG. 10 is a cross-sectional view illustrating the driving unit of FIG. 2 according to the first embodiment.
  • FIG. 10 is a cross-sectional view illustrating the driving unit of FIG. 2 according to the first embodiment.
  • FIG. 11 is a cross-sectional view illustrating the supporting frame of FIG. 10.
  • FIG. 12 to 14 are cross-sectional views illustrating the conductive coil of FIG. 10.
  • FIG. 15 is a cross-sectional view illustrating a driving part of FIG. 2 according to a second embodiment.
  • FIG. 16 is a cross-sectional view illustrating the supporting frame of FIG. 15.
  • FIG. 2 is a view schematically showing a sound generating apparatus according to the present invention.
  • the vibration membrane 100 and the driving unit 200 may be included.
  • the vibrating membrane 100 may include a graphene layer, the bending direction may be determined according to the magnetic field direction of the driving unit 200.
  • the reason why the vibrating membrane 100 is formed of graphene is because the mechanical rigidity of the graphene is high, so that the vibrating membrane 100 may be manufactured to have a very thin thickness.
  • the spring constant k related to the driving direction of the vibrating membrane 100 is lowered and the sound quality distortion can be lowered so that the mass m of the vibrating membrane itself can be negligible.
  • the phenomenon can be greatly reduced, and sound can be accurately reproduced.
  • the thickness t1 of the vibration membrane 100 may be manufactured to about several nm-about several tens of nm.
  • the thickness t1 of the vibration membrane 100 may be about 10 nm to about 600 nm, but is not limited thereto.
  • the vibrating membrane 100 may include a substrate and a graphene layer disposed on the substrate.
  • a plurality of carbon atoms are covalently linked to each other, the graphene to form a polycyclic aromatic molecule may be formed in the form of a film or sheet.
  • the carbon atoms connected by covalent bonds forms a 6-membered ring, but may further include a 5-membered and / or 7-membered.
  • the graphene layer may be, but is not limited to, a graphene monolayer or a graphene plural layer.
  • an organic layer may be formed between the substrate and the graphene layer.
  • the graphene layer and the organic layer may be formed by alternately forming one or more organic layers and one or more graphene layers, respectively, to form an organic-inorganic composite layer.
  • the reason why the organic layer is formed is because the surface strength of the vibrating membrane 100 is increased, the moisture absorption barrier property is excellent, and the life of the vibrating membrane 100 can be extended.
  • a protective film in contact with at least one surface of the graphene layer and the substrate may be formed.
  • the reason for forming the protective film is to protect the graphene layer from external impact.
  • the protective layer may be selected from the group consisting of PEDOT (poly (3,4-ethylenedioxythiophene)), thiophene polymer, polypyrrole, polyaniline, polyvinylidene fluoride (PVDF), PZT, and combinations thereof, but is not limited thereto. Does not.
  • PEDOT poly (3,4-ethylenedioxythiophene)
  • thiophene polymer polypyrrole
  • polyaniline polyaniline
  • PVDF polyvinylidene fluoride
  • PZT polyvinylidene fluoride
  • the vibrating membrane 100 may generate an internal magnetic field by an external magnetic field generated from the driving unit 200.
  • the direction of the internal magnetic field of the vibrating membrane 100 may be opposite to the direction of the external magnetic field generated from the driver 200.
  • the direction of the internal magnetic field of the vibrating membrane 100 may be generated in the lower direction.
  • the direction of the external magnetic field generated from the driving unit 200 when the direction of the external magnetic field generated from the driving unit 200 is in the lower direction, the direction of the internal magnetic field of the vibration membrane 100 may be generated in the upper direction.
  • the bending direction of the vibrating membrane 100 may be the upper or lower direction.
  • the vibrating membrane 100 may vibrate by the interaction force between the direction of the internal magnetic field of the vibrating membrane 100 and the direction of the external magnetic field of the driving unit 200.
  • the amplitude of the vibration membrane 100 may be determined by the interaction force between the strength of the internal magnetic field of the vibration membrane 100 and the strength of the external magnetic field of the driving unit 200.
  • the driving unit 200 may support the periphery of the vibrating membrane 100, generate a magnetic field proportional to the input current, and vibrate the vibrating membrane 100.
  • the driving part 200 may include a support part 210 supporting a peripheral part of the vibrating membrane 100.
  • the support part 210 may be disposed at the periphery of the upper surface of the vibrating membrane 100 and the periphery of the lower surface of the vibrating membrane 100, and may expose the central portion of the vibrating membrane 100 to the outside.
  • the support unit 210 may be formed of a material capable of transmitting a magnetic field generated by the driving unit 200.
  • the support unit 210 may be made of an insulating material through which the magnetic field generated by the driver 200 is not transmitted.
  • the driving unit 200 may be manufactured in various structures having an electromagnetic driving method.
  • the driving unit 200 may include a first, a second support frame and a conductive coil.
  • the first support frame can support the upper surface of the vibration membrane
  • the second support frame can support the lower surface of the vibration membrane
  • the first support frame may be disposed along a peripheral area of the upper surface of the vibrating membrane 100, and may include a first through hole exposing a central area of the upper surface of the vibrating membrane 100.
  • the second support frame may include a second through hole disposed along a peripheral area of the lower surface of the vibrating membrane 100 and exposing a central area of the lower surface of the vibrating membrane 100.
  • the conductive coils may be arranged to surround outer surfaces of the first and second support frames.
  • the driving unit 200 may induce a magnetic field inside the first and second support frames in which the conductive coil is wound.
  • the direction of the magnetic field induced inside the first and second support frames may be determined according to the direction of the current input to the conductive coil.
  • the drive unit 200 may include a first and a second support frame, a first and a second stationary armature, a magnetic core structure, and a conductive coil.
  • the first support frame can support the upper surface of the vibration membrane
  • the second support frame can support the lower surface of the vibration membrane
  • the first and second support frames may be insulators.
  • first fixed armature may be disposed on the first support frame
  • second fixed armature may be disposed on the second support frame
  • the magnetic core structure may connect one side of the first fixed armature and the second fixed armature, and the conductive coil may be disposed to surround the outer surface of the magnetic core structure.
  • the first fixed armature has a peripheral region in contact with the first support frame, the central region is disposed at a first distance from the upper surface of the vibrating membrane, and the second fixed armature has a peripheral region in contact with the second support frame.
  • the central region may be disposed apart from the lower surface of the vibrating membrane at a second interval.
  • a plurality of holes may be formed in the central region of the first fixed armature and the central region of the second fixed armature.
  • the driving unit 200 may generate a magnetic field between the connected first and second fixed armatures through the magnetic core structure in which the conductive coil is wound.
  • the vibration membrane 100 may be determined by the driving unit 200 configured according to the magnetic field direction and the intensity generated from the driving unit 200.
  • the present invention can minimize the thickness of the vibration membrane by using the graphene acoustic vibration membrane, and drive the graphene acoustic vibration membrane by an electromagnetic driving method, thereby driving at a low voltage.
  • the present invention can realize the best sound quality while minimizing distortion of sound quality with a low driving voltage.
  • 3 and 4 are views illustrating a driving principle of the vibrating membrane of FIG. 2.
  • the vibrating membrane may include a graphene layer 110.
  • the graphene layer 110 a plurality of carbon atoms are covalently connected to each other, the graphene to form a polycyclic aromatic molecule may be formed in a film or sheet form.
  • the carbon atoms connected by covalent bonds forms a 6-membered ring, but may further include a 5-membered and / or 7-membered.
  • the graphene layer 110 may generate an internal magnetic field by an external magnetic field.
  • the lattice structure of the graphene layer 110 has a lattice structure similar to the benzene ring.
  • the induction current ig may be generated in the graphene layer 110 having a lattice structure similar to that of the benzene ring by the external magnetic field Bo, and the internal magnetic field Bg may be generated in the graphene layer 110 by the induction current ig.
  • the external magnetic field Bo and the internal magnetic field Bg of the graphene layer 110 may generate displacement in the vibrating membrane including the graphene layer by an interaction force.
  • the sound pressure may be generated in proportion to the displacement of the vibration membrane.
  • the displacement of the vibrating membrane can be controlled by adjusting the size of the external magnetic field, so that the acoustic control It is possible.
  • the direction of the internal magnetic field of the graphene layer 110 may be opposite to the direction of the external magnetic field.
  • the induced current ig induced in the graphene layer 110 is generated in a clockwise direction on the plane, and the graphene layer 110 is induced by the induced current ig.
  • the direction of the internal magnetic field Bg of) may be generated in the downward direction.
  • the induced current ig induced in the graphene layer 110 is generated counterclockwise on the plane, and the graphene layer 110 is induced by the induced current ig.
  • the direction of the internal magnetic field Bg of, may be generated in the upper direction.
  • the bending direction of the vibration membrane may be the upper or lower direction.
  • the vibrating membrane can vibrate by the interaction force between the direction of the inner magnetic field of the vibrating membrane and the direction of the outer magnetic field.
  • the amplitude of the vibration membrane can be determined by the interaction force between the strength of the internal magnetic field of the vibration membrane and the strength of the external magnetic field.
  • FIG. 5 to 9 are cross-sectional views showing the structure of the vibration membrane of Figure 2
  • Figure 5 is a vibration membrane according to the first embodiment
  • Figure 6 is a vibration membrane according to the second embodiment
  • Figure 7 is a third embodiment 8 is a vibration membrane according to the fourth embodiment
  • FIG. 9 is a vibration membrane according to the fifth embodiment.
  • the vibrating membrane 100 may include a substrate 10 and a graphene layer 120 disposed on the substrate 110.
  • the substrate is a polyethylene terephthalate (PET), polypropylene (PP), polymethyl methacrylate (PMMA), polycarbonate (PC), polyether sulfone (PES), It may be selected from the group consisting of polyvinylchloride (PVC), polypyrrole, polyimide, polyethylene (PE) and combinations thereof, but is not limited thereto.
  • PET polyethylene terephthalate
  • PP polypropylene
  • PMMA polymethyl methacrylate
  • PC polycarbonate
  • PES polyether sulfone
  • PVC polyvinylchloride
  • PE polypyrrole
  • PE polyimide
  • PE polyethylene
  • graphene layer 120 a plurality of carbon atoms are covalently linked to each other, and thus, graphene, which forms polycyclic aromatic molecules, may be formed in a film or sheet form.
  • the carbon atoms connected by covalent bonds forms a 6-membered ring, but may further include a 5-membered and / or 7-membered.
  • the reason why the vibrating membrane 100 is formed of graphene is because the mechanical rigidity of the graphene is high, so that the vibrating membrane 100 may be manufactured to have a very thin thickness.
  • the spring constant k related to the driving direction of the vibrating membrane 100 is lowered and the sound quality distortion can be lowered so that the mass m of the vibrating membrane itself can be negligible.
  • the phenomenon can be greatly reduced, and sound can be accurately reproduced.
  • the thickness t1 of the vibration membrane 100 may be manufactured to about several nm-about several tens of nm.
  • the thickness t1 of the vibration membrane 100 may be about 10 nm to about 600 nm, but is not limited thereto.
  • the vibrating membrane 100 may include a substrate 110 and a graphene layer 120 disposed on the substrate 110.
  • the graphene layer 120 may be formed by stacking the first graphene layer 122 and the second graphene layer 124.
  • the graphene layer 120 may be formed of a single graphene layer, but in some cases, may be formed of a plurality of graphene layers.
  • the vibrating membrane 100 including the graphene plural layers may have better mechanical rigidity 120 than the vibrating membrane 100 including the graphene single layer.
  • the vibrating membrane 100 includes a substrate 110 and a graphene layer 120 disposed on the substrate 110.
  • the organic layer 130 may be further formed between the graphene layers 120.
  • the vibration membrane 100 may include a substrate 110 and a graphene layer 120 disposed on the substrate 110.
  • the graphene layer 120 may be formed by stacking the first graphene layer 122 and the second graphene layer 124.
  • an organic layer 130 may be further formed between the substrate 110 and the first graphene layer 122 and between the first graphene layer 122 and the second graphene layer 124.
  • the graphene layer 120 and the organic layer 130 may have one or more organic layers 130 and one or more graphene layers 120 alternately formed to form an organic-inorganic composite layer.
  • the reason why the organic layer 130 is formed is because the surface strength of the vibration membrane 100 is increased, the moisture absorption barrier property is excellent, and the life of the vibration membrane 100 can be extended.
  • the vibrating membrane 100 includes a substrate 110 and a graphene layer 120 disposed on the substrate 110, and the graphene layer A protective layer 140 may be formed to contact at least one surface of the 120 and the substrate 110.
  • the reason for forming the protective film 140 is to protect the graphene layer 120 from an external impact.
  • the protective layer may be selected from the group consisting of PEDOT (poly (3,4-ethylenedioxythiophene)), thiophene polymer, polypyrrole, polyaniline, polyvinylidene fluoride (PVDF), PZT, and combinations thereof, but is not limited thereto. Does not.
  • PEDOT poly (3,4-ethylenedioxythiophene)
  • thiophene polymer polypyrrole
  • polyaniline polyaniline
  • PVDF polyvinylidene fluoride
  • PZT polyvinylidene fluoride
  • the vibration membrane of the present invention including the graphene layer may be manufactured in various structures.
  • FIG. 10 is a cross-sectional view illustrating the driving unit of FIG. 2 according to the first embodiment.
  • FIG. 10 is a cross-sectional view illustrating the driving unit of FIG. 2 according to the first embodiment.
  • the driving unit 200 may include first and second support frames 220 and 230 and a conductive coil 240.
  • the first support frame 220 may support the upper surface 101 of the vibrating membrane 100.
  • the second support frame 230 may support the lower surface 102 of the vibrating membrane 100.
  • the first support frame 220 is disposed along the peripheral region of the upper surface 101 of the vibrating membrane 100, and exposes a first through hole exposing the central region of the upper surface 101 of the vibrating membrane 100. 221).
  • the second support frame 230 is disposed along the peripheral region of the lower surface 102 of the vibration membrane 100, and exposes a second through hole exposing the central region of the lower surface 102 of the vibration membrane 100. 231).
  • first and second support frames 220 and 230 may be bobbins.
  • the conductive coil 240 may be disposed to surround the outer side surface 224 of the first support frame 220 and the outer side surface 234 of the second support frame 230.
  • the inner side surface 222 of the first support frame 220 may be perpendicular to the upper surface 101 of the vibrating membrane 100.
  • the inner surface 232 of the second support frame 230 may be perpendicular to the lower surface 102 of the vibration membrane 100.
  • the inner surface 222 of the first support frame 220 may be inclined with respect to the upper surface 101 of the vibrating membrane 100, and the inner surface 232 of the second support frame 230 may be inclined. ) May be inclined with respect to the lower surface 102 of the vibrating membrane 100.
  • the number of times of winding the outer surface 224 of the first support frame 220 and the number of times of winding the outer surface 234 of the second support frame 230 may be the same as the conductive coil 240. .
  • the number of times that the conductive coil 240 is wound around the outer surface 224 of the first support frame 220 and the number of times that the outer surface 234 of the second support frame 230 is wound may be different.
  • the driving unit 200 may induce a magnetic field inside the first and second support frames 220 and 230 in which the conductive coil 240 is wound.
  • the direction of the magnetic field induced inside the first and second support frames 220 and 230 may be determined according to the direction of the current input to the conductive coil 240.
  • the first and second external magnetic fields proportional to the input current i are wound by the conductive coil 240. It may be organic in the support frame (220, 230).
  • an induced current may be induced by an external magnetic field, and a diamagnetic magnetic field may be generated inside the vibrating membrane 100 by the induced current.
  • the vibration membrane 100 may be displaced and vibrate up and down.
  • a sound pressure may be generated in proportion to the displacement of the vibrating membrane 100.
  • the displacement of the vibrating membrane can be controlled by adjusting the size of the external magnetic field, so that the acoustic control It is possible.
  • the vibrating membrane can vibrate by the interaction force between the direction of the inner magnetic field of the vibrating membrane and the direction of the outer magnetic field.
  • the amplitude of the vibration membrane can be determined by the interaction force between the strength of the internal magnetic field of the vibration membrane and the strength of the external magnetic field.
  • FIG. 11 is a cross-sectional view illustrating the supporting frame of FIG. 10.
  • the driving unit 200 may include first and second support frames 220 and 230 and a conductive coil 240.
  • first support frame 220 may support the upper surface 101 of the vibrating membrane 100
  • second support frame 230 supports the lower surface 102 of the vibrating membrane 100. can do.
  • the inner surface 222 of the first support frame 220 may be inclined with respect to the upper surface 101 of the vibrating membrane 100, and the inner surface 232 of the second support frame 230 may be inclined. , With respect to the lower surface 102 of the vibrating membrane 100.
  • the inner side surface 222 of the first support frame 220 may be inclined at a first angle ⁇ 1 with respect to the upper surface 101 of the vibrating membrane 100.
  • the inner side surface 232 of the second support frame 230 may be inclined at a second angle ⁇ 2 with respect to the lower side surface 102 of the vibrating membrane 100.
  • first angle ⁇ 1 and the second angle ⁇ 2 may be the same, but may be different from each other in some cases.
  • first angle ⁇ 1 and the second angle ⁇ 2 may be obtuse angles.
  • the reason why the first angle ⁇ 1 and the second angle ⁇ 2 are obtuse angles is to allow the generated sound to be better diffused to the outside by the displacement of the vibration membrane 100.
  • FIG. 12 to 14 are cross-sectional views illustrating the conductive coil of FIG. 10.
  • the conductive coil 240 may be disposed to surround the outer side surface 224 of the first support frame 220 and the outer side surface 234 of the second support frame 230. Can be.
  • the conductive coil 240 includes a first conductive coil 241 winding the outer surface 224 of the first support frame 220 and an outer surface 234 of the second support frame 230. ) May include a second conductive coil 242 wound.
  • the conductive coil 240 may be wound around the outer surface 224 of the first support frame 220 and the outer surface 234 of the second support frame 230. ) The number of turns may be different.
  • the number of turns of the first conductive coil 241 wound around the outer surface 224 of the first support frame 220 may wind the outer surface 234 of the second support frame 230. It may be less than the number of turns of the second conductive coil 242.
  • the number of windings of the first conductive coil 241 winding the outer surface 224 of the first supporting frame 220 may be the winding of the outer surface 234 of the second supporting frame 230.
  • the number of turns of the two conductive coils 242 may be greater.
  • the number of turns of the first conductive coil 241 winding the outer surface 224 of the first support frame 220 and the second conductive coil winding the outer surface 234 of the second support frame 230 may affect the strength of the internal magnetic field of the vibrating membrane, and may also affect the displacement of the vibrating membrane.
  • FIG. 15 is a cross-sectional view illustrating a driving part of FIG. 2 according to a second embodiment.
  • the driving unit 200 includes first and second support frames 250 and 260, first and second fixed armatures 290a and 290b, magnetic core structure 270, and a conductive coil 280. ) May be included.
  • the first support frame 250 may support the upper surface 101 of the vibrating membrane 100.
  • the second support frame 260 may support the lower surface 102 of the vibrating membrane 100.
  • first and second support frames 250 and 260 may be insulators.
  • the inner surface 252 of the first support frame 250 may be perpendicular to the upper surface 101 of the vibration membrane 100.
  • the inner surface 262 of the second support frame 260 may be perpendicular to the lower surface 102 of the vibrating membrane 100.
  • the inner surface 252 of the first support frame 250 may be inclined with respect to the upper surface 101 of the vibrating membrane 100, and the inner surface 262 of the second support frame 260 may be inclined. ) May be inclined with respect to the lower surface 102 of the vibrating membrane 100.
  • first fixed armature 290a may be disposed on the first support frame 250
  • second fixed armature 290b may be disposed on the second support frame 260.
  • the magnetic core structure 270 may connect one side of the first fixed armature 290a and the second fixed armature 290b.
  • one end of the magnetic core structure 270 may be connected to one end of the first fixed armature 290a, and the other end of the magnetic core structure 270 may be connected to one end of the second fixed armature 290b. .
  • the conductive coil 280 may be disposed to surround the outer surface of the magnetic core structure 270.
  • the conductive coils 280 may be spaced apart from the outer surfaces of the first and second support frames 250 and 260 at predetermined intervals.
  • the conductive coils 280 may be disposed at regular intervals from the outer surface 254 of the first support frame 250, and may be spaced apart from the outer surface 264 of the second support frame 260 at regular intervals. Can be arranged.
  • the first fixed armature 290a may have a peripheral area in contact with the first support frame 250 and a central area may be disposed at a first interval from the upper surface 101 of the vibrating membrane 100.
  • the second fixed armature 290b may have a peripheral area in contact with the second support frame 260, and a central area of the second fixed armature 290b spaced apart from the lower surface 102 of the vibrating membrane 100 at a second interval.
  • first interval and the second interval may be identical to each other, but may be different from each other in some cases.
  • a plurality of holes 300 may be formed in the central region of the first fixed armature 290a and the central region of the second fixed armature 290b.
  • the size of the hole 300 formed in the center region of the first fixed armature 290a and the size of the hole 300 formed in the center region of the second fixed armature 290b may be the same. In some cases, they may be different.
  • the size of the hole 300 may increase gradually from the central area of the first fixed armature 290a to the edge area, and the hole (rear) from the central area of the second fixed armature 290b to the edge area.
  • the size of 300 may be gradually increased.
  • the reason is to make the intensity of the sound pressure output to the outside through the hole 300 uniform.
  • the sound pressure generated in the center region of the vibrating membrane 100 is greater than the sound pressure generated in the edge region of the vibrating membrane 100, a hole located above the center region of the vibrating membrane 100 ( By decreasing the size of 300 and increasing the size of the hole 300 located above the edge region of the vibrating membrane 100, the intensity of the sound pressure output to the outside through the hole 300 may be uniform throughout. .
  • the driving unit 200 connects the first and second fixed armatures 290a and 290b through the magnetic core structure 270 in which the conductive coil 280 is wound.
  • a magnetic field can be generated in between.
  • the direction of the magnetic field generated between the first and second fixed armatures 290a and 290b may be determined according to the direction of the current input to the conductive coil 280.
  • an induced current may be induced by an external magnetic field, and a diamagnetic magnetic field may be generated inside the vibrating membrane 100 by the induced current.
  • the vibration membrane 100 may be displaced and vibrate up and down.
  • a sound pressure may be generated in proportion to the displacement of the vibrating membrane 100.
  • the displacement of the vibrating membrane can be controlled by adjusting the size of the external magnetic field, so that the acoustic control It is possible.
  • the vibrating membrane can vibrate by the interaction force between the direction of the inner magnetic field of the vibrating membrane and the direction of the outer magnetic field.
  • the amplitude of the vibration membrane can be determined by the interaction force between the strength of the internal magnetic field of the vibration membrane and the strength of the external magnetic field.
  • the vibration membrane 100 may be determined by the driving unit 200 configured according to the magnetic field direction and the intensity generated from the driving unit 200.
  • the present invention can minimize the thickness of the vibration membrane by using the graphene acoustic vibration membrane, and drive the graphene acoustic vibration membrane by an electromagnetic driving method, thereby driving at a low voltage.
  • the present invention can realize the best sound quality while minimizing distortion of sound quality with a low driving voltage.
  • FIG. 16 is a cross-sectional view illustrating the supporting frame of FIG. 15.
  • the driving unit 200 includes the first and second support frames 250 and 260, the first and second fixed armatures 290a and 290b, the magnetic core structure 270, and the conductive coil 280. ) May be included.
  • the first support frame 250 may support the upper surface 101 of the vibrating membrane 100
  • the second support frame 260 supports the lower surface 102 of the vibrating membrane 100. can do.
  • the inner surface 252 of the first support frame 250 may be inclined with respect to the upper surface 101 of the vibrating membrane 100, and the inner surface 262 of the second support frame 260 may be inclined. , With respect to the lower surface 102 of the vibrating membrane 100.
  • the inner side surface 252 of the first support frame 250 may be inclined at a first angle ⁇ 1 with respect to the upper surface 101 of the vibrating membrane 100.
  • the inner side surface 262 of the second support frame 260 may be inclined at a second angle ⁇ 2 with respect to the lower surface 102 of the vibrating membrane 100.
  • first angle ⁇ 1 and the second angle ⁇ 2 may be the same, but may be different from each other in some cases.
  • first angle ⁇ 1 and the second angle ⁇ 2 may be obtuse angles.
  • the reason why the first angle ⁇ 1 and the second angle ⁇ 2 are obtuse angles is to allow the generated sound to be better diffused to the outside by the displacement of the vibration membrane 100.
  • the present invention is configured, by using the graphene acoustic vibration membrane can minimize the thickness of the vibration membrane, by driving the graphene acoustic vibration membrane by the electromagnetic drive method, it is possible to drive at a low voltage.
  • the present invention can realize the best sound quality while minimizing distortion of sound quality with a low driving voltage.
  • the sound generating apparatus according to the present invention is not limited to the configuration and method of the embodiments described as described above, but the embodiments are a combination of all or part of each embodiment selectively so that various modifications can be made. It may be configured.
  • the present invention relates to an acoustic generator having a graphene diaphragm. Therefore, the present invention has industrial applicability.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

La présente invention concerne un dispositif de génération de son doté d'une membrane au graphène et comportant: une membrane; et une unité d'entraînement servant à soutenir le pourtour de la membrane et à faire vibrer la membrane en générant un champ magnétique proportionnel à un courant introduit, la membrane comprenant une couche de graphène, et un sens de courbure de la membrane pouvant être déterminé en fonction d'un sens du champ magnétique de l'unité d'entraînement. Dans le cas présent, l'unité d'entraînement peut comporter: une première ossature de soutien servant à soutenir la surface supérieure de la membrane; une deuxième ossature de soutien servant à soutenir la surface inférieure de la membrane; et une bobine conductrice entourant les surfaces latérales extérieures des première et deuxième ossatures de soutien, ou l'unité d'entraînement peut comporter: une première ossature de soutien servant à soutenir la surface supérieure de la membrane; une deuxième ossature de soutien servant à soutenir la surface inférieure de la membrane; une première armature fixe disposée sur la première ossature de soutien; une deuxième armature fixe disposée sur la deuxième ossature de soutien; une structure de noyau magnétique servant à relier un côté des première et deuxième armatures fixes; et une bobine conductrice entourant la surface extérieure de la structure de noyau magnétique.
PCT/KR2014/004417 2013-11-01 2014-05-16 Dispositif de génération de son WO2015064871A1 (fr)

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KR10-2013-0131968 2013-11-01
KR1020130131968A KR20150050829A (ko) 2013-11-01 2013-11-01 음향 발생 장치

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Cited By (5)

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CN106248196A (zh) * 2016-08-31 2016-12-21 杨霖 一种微声探测分析装置及基于该装置的阵列音频信号处理方法
WO2018066002A1 (fr) * 2016-10-04 2018-04-12 Mohare Pradnesh Ensembles pour génération de son
EP3326386A4 (fr) * 2015-07-22 2019-03-27 Google LLC Dispositifs et procédés pour un haut-parleur électromagnétique à hautes performances faisant appel à des monocouches
WO2020115739A1 (fr) * 2018-12-06 2020-06-11 Waves Audio Ltd. Ensemble de membrane polymère de graphène nanocomposite et son procédé de fabrication
WO2022243317A1 (fr) * 2021-05-18 2022-11-24 Paragraf Limited Transducteur de graphène

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JP2010251816A (ja) * 2009-04-10 2010-11-04 Toa Corp 薄型音響電気機械変換器
KR101058475B1 (ko) * 2010-05-14 2011-08-24 한국기계연구원 그라핀 맴브레인을 이용한 ｍｅｍｓ 마이크로폰과 그 제조방법
KR20120064984A (ko) * 2010-12-10 2012-06-20 한국전자통신연구원 압전 스피커
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JP2003319490A (ja) * 2002-04-19 2003-11-07 Sony Corp 振動板及びその製造方法、並びにスピーカ
JP2010251816A (ja) * 2009-04-10 2010-11-04 Toa Corp 薄型音響電気機械変換器
KR101058475B1 (ko) * 2010-05-14 2011-08-24 한국기계연구원 그라핀 맴브레인을 이용한 ｍｅｍｓ 마이크로폰과 그 제조방법
KR20120064984A (ko) * 2010-12-10 2012-06-20 한국전자통신연구원 압전 스피커
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3326386A4 (fr) * 2015-07-22 2019-03-27 Google LLC Dispositifs et procédés pour un haut-parleur électromagnétique à hautes performances faisant appel à des monocouches
CN106248196A (zh) * 2016-08-31 2016-12-21 杨霖 一种微声探测分析装置及基于该装置的阵列音频信号处理方法
WO2018066002A1 (fr) * 2016-10-04 2018-04-12 Mohare Pradnesh Ensembles pour génération de son
CN110546964A (zh) * 2016-10-04 2019-12-06 普拉德内什·莫哈尔 用于声音生成的组件
US11289065B2 (en) 2016-10-04 2022-03-29 Pradnesh Mohare Assemblies for generation of sound
WO2020115739A1 (fr) * 2018-12-06 2020-06-11 Waves Audio Ltd. Ensemble de membrane polymère de graphène nanocomposite et son procédé de fabrication
WO2022243317A1 (fr) * 2021-05-18 2022-11-24 Paragraf Limited Transducteur de graphène

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