TW201240486A - Thermal acoustic device and electric device - Google Patents

Abstract

The present invention relates to a thermal acoustic device. The thermal acoustic device includes a heater and a thermal acoustic element. The heater is used to heat the thermal acoustic element. The thermal acoustic element includes a graphene film. The present invention further provides an electric device using the thermal acoustic device.

Description

201240486, VI. Description of the Invention: [Technical Field] The present invention relates to a thermo-acoustic device, and more particularly to a graphene-based thermoacoustic device and an electronic device using the same. ^ [0002] [Previous Techniques] The thermo-acoustic device is generally composed of a signal input device and a sounding element, and a signal is input to the sound-emitting element through the signal input device to emit sound. The thermoacoustic device is one of the sounding devices, which is a thermoacoustic device based on thermoacoustic response, see the document "The Thermo-phone", EDWARD C. WENTE, Vol. XIX, No. 4, p333 -345 and "On Some Thermal Effects of Elec-tric Currents", William Henry Preece, Proceedings of the Royal Society of London, Vol. 30, p408-41 1 (1879-1881). It discloses a thermo-acoustic device that achieves sound by introducing an alternating current into a conductor. The conductor has a small heat capacity, a thin thickness, and the ability to rapidly transfer heat generated inside it to the surrounding gaseous medium. When the alternating current passes through the conductor, the conductor rapidly rises and falls with the change of the alternating current, and the heat exchange with the surrounding gas medium rapidly causes the surrounding gas medium to move, and the density of the gas medium changes accordingly, thereby generating sound waves. [0003] In addition, HD Arnold and IB Crandall disclose a simple thermoacoustic device using a platinum in the document "The thermophone as a precision source of sound", Phys. Rev. 10, p22-38 (1917). The sheet is used as a thermal sounding element. Receptaments 100112575 Form No. A0101 Page 3 / Total 58 pages 1002020944-0 201240486 The material itself is limited to the use of the platinum sheet as a thermo-acoustic component of the thermoacoustic component, which produces a frequency of up to 4,000 Hertz, and the vocal efficiency is low. SUMMARY OF THE INVENTION [0004] In view of the above, it is indeed necessary to provide a thermo-acoustic sounding device having a high sounding frequency and good sounding effect. [0005] A thermo-acoustic device comprising a uniform thermal device and a thermo-acoustic device for providing energy to the thermo-acoustic component to generate heat to the thermo-acoustic component; wherein the thermal The sound emitting element comprises a graphene film. [0006] Compared with the prior art, the thermoacoustic device provided by the present invention has the following advantages: First, since the thermo-acoustic element in the thermo-acoustic device does not require other complicated structures such as magnets, the thermo-acoustic sound is generated. The structure of the device is relatively simple, which is advantageous for reducing the cost of the thermo-acoustic device. Third, since the thin film of graphite is thinner and has a lower heat capacity, it has a higher sounding frequency and a higher sounding efficiency. [Embodiment] Hereinafter, a thermoacoustic sounding device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The same components are denoted by the same reference numerals in the following embodiments. The schematic diagrams involved in the embodiments of the present invention are not intended to limit the embodiments themselves in order to better illustrate the embodiments. Referring to FIG. 1 and FIG. 2, a first embodiment of the present invention provides a thermo-acoustic device 10 that includes a thermo-acoustic component 102 and a pyrogenic device 104. 100112575 Form No. A0101 Page 4 of 58 1002020944-0 201240486 ’ ' [0009] The heating device 104 is used to supply energy to the thermo-acoustic element 102, causing the thermo-acoustic element 102 to generate heat and emit sound. In this embodiment, the heating device 104 provides electrical energy to the thermally audible elements, causing the thermally audible elements 102 to generate heat under the action of Joule heat. The heating device 104 includes a first electrode 104a and a second electrode 104b. The first electrode 104a and the second electrode 104b are electrically connected to the thermo-acoustic element 102, respectively. In the present embodiment, the first electrode 104a and the second electrode 104b are respectively disposed on the surface of the thermoacoustic element 102 and are flush with the opposite sides of the thermoacoustic element 102.第一 [0010] The first electrode 104a and the second electrode 104b in the heating device 104 are used to provide an electrical signal to the thermo-acoustic element 102, causing the thermo-acoustic element 102 to generate Joule heat, and the temperature is raised to emit sound. The first electrode 104a and the second electrode 104b may be in the form of a layer (filament or strip), a rod, a strip, a block or other shapes, and the cross section may have a circular shape, a square shape, a trapezoidal shape, or the like. Triangle, polygon, or other irregular shape. The first electrode 104a and the second electrode 104b may be fixed to the surface of the thermoacoustic element 102 by adhesion of a bonding agent. In order to prevent the heat of the thermo-acoustic element 102 from being excessively absorbed by the first electrode 104a and the second electrode 104b to affect the sound-sounding effect, the contact area between the first electrode 104a and the second electrode 104b and the thermo-acoustic element 102 is small. Therefore, the shape of the first electrode 104a and the second electrode 104b is preferably a filament shape or a ribbon shape. The material of the first electrode 104a and the second electrode 104b may be selected from a metal, a conductive paste, a conductive paste, an indium tin oxide (ITO) or a carbon nanotube. When the first electrode 104a and the second electrode 104b have a certain intensity, the first electrode 104a and the second electrode 104b can support the thermoacoustic element 100112575 Form No. A0101 Page 5 / Total 58 Page 1002020944-0 [0011] The role of 201240486 102. If the two ends of the first caller: coffee (10) are respectively fixed on one frame, the thermo-acoustic element 102 is disposed on the first electrode ma and the second electrode, and the thermo-acoustic element ι〇2 passes through the first electrode 104a. And the second electrode 〗 〖4b is suspended. [0012] In the present embodiment, the first electrode 1G4a and the second electrode are formed on the thermo-acoustic element (10) silver electrode by a printing method such as screen printing. [0013] [0014] 100112575 The thermo-acoustic device 1 includes a --electrode lead (not shown) and a second electrode lead (not shown) - the first electrode lead and the first - The electrode lead is electrically connected to the first electrode core and the second electrode 1〇4b of the thermo-acoustic device 1〇, respectively, such that the first electrode ma is electrically connected to the first electrode lead, and the second electrode 1041) The second electrode lead is electrically connected. The thermo-acoustic device 10 is electrically connected to an external circuit through the first electrode lead and the second electrode lead. The thermo-acoustic element 102 includes a graphite thin film, and the graphite thin film is a two-dimensional structure having a constant-area film structure. The thickness of the graphite thin film is from G.34 nm to 10 nm. The graphite_ includes at least a layer of graphite. When the graphene film comprises a plurality of layers of graphite, The multi-layered graphite annihilation may be overlapped with each other to form a graphite thin film 'to make the graphite thin film have a larger area; or the multi-layered graphene may be superposed on each other to form a graphite thin film to increase the thickness of the graphite thin film. Preferably, The graphite _ is _ single layer graphene. The ruthene is a two-dimensional planar structure composed of a single carbon double-bonded hybrid with a carbon atom. The thickness of the graphite may be a single layer of carbon atoms. The graphene film has a high permeability, a single layer. The graphite form is thinly woven and can be '7%, so the m ink film is used as the form number A_S 6 pages/total 58 pages 100202094 201240486 Ο [0015]

[0016] The thermoacoustic device of the thermoacoustic element can be a transparent thermoacoustic device. Since the thickness of the graphene film is very thin, it has a low heat capacity, and its heat capacity can be less than 2χ10_3 joules per square centimeter Kelvin, and the heat capacity of the single-layer graphene can be less than 5.57x1 (Γ4 joules per square centimeter Kelvin. The graphene film is a self-supporting structure, and the self-supporting graphene film does not require a large-area carrier support, and as long as the supporting force is provided on both sides, it can be suspended as a whole to maintain its own film state, that is, the graphene film. When placed on (or fixed to) two supports spaced apart by a fixed distance, the graphene film between the two supports can be suspended to maintain its own film state. Experiments show that graphene is not a 100% smooth and flat A two-dimensional film with a large number of microscopic undulations on the surface of a single-layer graphene, in which the single-layer graphene is maintained in such a way as to maintain its self-supportability and stability. The method may be a chemical vapor deposition method, an LB method or a method of tearing off the oriented graphite with a tape. In this embodiment, the method is prepared by chemical vapor deposition. The ocene film is grown on the surface of a metal film substrate by chemical vapor deposition. The working medium of the thermoacoustic element 102 is not limited, and only needs to satisfy a resistivity greater than that of the thermo-acoustic element 102. The resistivity is sufficient. The medium comprises a gaseous medium or a liquid medium. The gaseous medium may be air. The liquid medium includes one or more of a non-electrolyte solution, water, an organic solvent, etc. The resistance of the liquid medium The rate is greater than 0.01 ohm·m, preferably, the liquid medium is pure water. The conductivity of the purified water can reach 1.5. 5 x lO7 ohm·m, and the heat capacity per unit area is also large, which can conduct heat. The heat generated by the sounding element 102 can be used to dissipate heat from the thermoacoustic element 102 100112575 Form No. A0101, page 7 / page 58 1002020944-0 201240486. In the present embodiment, the medium is air. '[0017] The thermo-acoustic device 10 of the example can be electrically connected to an external circuit through the first electrode 104a and the second electrode 104b, thereby thereby receiving an external signal to sound. Since the thermo-acoustic element 102 includes a stone The olefin film, the graphene film has a small heat capacity per unit area and a large heat dissipation area, and after the heat generating device 104 inputs a signal to the thermo-acoustic element 102, the thermo-acoustic element 102 can rapidly rise and fall, generating Periodic temperature changes, and rapid heat exchange with the surrounding medium, the density of the surrounding medium is periodically changed, and then the sound is emitted. In short, the thermoacoustic element 102 of the embodiment of the present invention is powered by The conversion of the thermo-acoustic to achieve the sounding. In addition, the thermoacoustic device 10 is a transparent heat-sounding device by using the high transmittance of the graphene film. [0018] The thermo-acoustic device 10 provided in this embodiment The sound pressure level is greater than 50 decibels per watt of sound pressure level, and the vocal frequency range is from 1 Hz to 100,000 Hz (ie ΙΗζ-lOOkHz). The thermoacoustic device may have a distortion of less than 3% in the frequency range of 500 Hz to 10,000 Hz. Referring to FIG. 3 and FIG. 4, a second embodiment of the present invention provides a thermo-acoustic device 20. The thermo-acoustic device 20 of the present embodiment is different from the thermo-acoustic device 10 of the first embodiment in that the thermo-acoustic device 20 of the present embodiment further includes a substrate 208. The thermally audible element 102 is disposed on a surface of the substrate 208. The first electrode 104a and the second electrode 104b are disposed on a surface of the thermoacoustic element 102. The shape, size and thickness of the substrate 208 are not limited, and the surface of the substrate 208 may be a flat surface or a curved surface. The material of the substrate 208 is not limited and may be a hard material or a flexible material having a certain strength. Preferably, the material of the substrate 208 100112575 Form No. A0101 Page 8 / Total 58 pages 1002020944-0 201240486 The resistance should be greater than the resistance of the thermoacoustic element 102, and has better thermal and thermal resistance, thereby preventing Excessive heat generated by the thermoacoustic element 1 〇2 is absorbed by the substrate 208. Specifically, the insulating material may be glass, ceramic, quartz, diamond, plastic, resin or wood material. [0020] In the present embodiment, the substrate 208 includes at least one hole 208a. The depth of the hole 2〇8a is less than or equal to the thickness of the substrate 208. When the depth of the hole 2〇8a is smaller than the thickness of the substrate 208, the hole 208a is a blind hole. When the depth of the hole 2〇8a is equal to the thickness of the substrate 208, the hole 208a is a through hole. The shape of the cross section of the hole 208a is not limited and may be a circle, a square, a rectangle, a triangle, a polygon, an I-shape, or an irregular figure. When the substrate 208 includes a plurality of holes 208a, the plurality of holes 208a < Uniformly distributed, distributed in a regular pattern or randomly distributed on the substrate 208. The spacing of each adjacent two holes 208a is not limited, and is preferably from 100 micrometers to 3 millimeters. In this embodiment, the substrate includes a plurality of holes 208a, which are through holes having a cylindrical shape in cross section and uniformly distributed on the substrate 208. [0021] The thermoacoustic element 102 is disposed on the surface of the substrate 208 and is suspended relative to the aperture 208a in the base 208. In this embodiment, since the portion of the thermo-acoustic element 102 above the hole 208a is suspended, the portions of the thermo-acoustic element 102 are in contact with the surrounding medium, increasing the contact of the thermo-acoustic element 102 with the surrounding gas or liquid medium. The area of the thermo-acoustic element 102 is not easily broken because the other portion of the thermo-acoustic element 102 is in direct contact with the surface of the substrate 208 and supported by the substrate 208. [0022] Referring to FIG. 5, a third embodiment of the present invention provides a thermo-acoustic device 30 100112575 Form No. A0101 Page 9 of 58 1002020944-0 201240486. The difference between the thermo-acoustic device 30 provided in this embodiment and the thermo-acoustic device 20 provided in the second embodiment is that, in this embodiment, the base 308 of the thermo-acoustic device 30 includes at least one slot 308a, the slot 308a One surface 308b is disposed on the substrate 308. The depth of the groove 308a is smaller than the thickness of the substrate 308. The slot 308a may be a blind slot or a slot. When the slot 308a is a blind slot, the length of the slot 308a is less than the distance between the two opposing sides of the base 308. When the groove 308a is a through groove, the length of the groove 308a is equal to the distance between the two opposite sides of the substrate 308. The groove 308a causes the surface 308b to form an uneven surface. The depth of the groove 308a is smaller than the thickness of the substrate 308, and the length of the groove 308a is not limited. The shape of the groove 308a on the surface 308b of the substrate 308 may be rectangular, arcuate, polygonal, oblate, or other irregular shape. Referring to FIG. 5, in the embodiment, the substrate 308 is provided with a plurality of grooves 308a. The grooves 308a are blind grooves, and the groove 308a has a rectangular shape on the surface 308b of the substrate 308. Referring to Fig. 6, the groove 308a has a rectangular cross section in the longitudinal direction thereof, that is, the groove 308a has a rectangular parallelepiped structure. Referring to Fig. 7, the groove 308a has a triangular cross section in its longitudinal direction, i.e., the groove 308a has a triangular prism structure. When the surface 308b of the substrate 308 has a plurality of blind grooves, the plurality of blind grooves may be uniformly distributed, distributed in a regular pattern or randomly distributed on the surface 308b of the substrate 308. Referring to FIG. 7, the groove pitch of two adjacent blind grooves may be close to zero, that is, the area where the substrate 308 is in contact with the thermo-acoustic element 102 is a plurality of lines. It can be understood that in other embodiments, by changing the shape of the groove 308a, the area where the thermo-acoustic element 102 contacts the substrate 308 is a plurality of points, that is, between the thermo-acoustic element 102 and the substrate 308. Point contact, line contact or face contact. 100112575 Form No. A0101 Page 10 of 58 1002020944-0 201240486 ' '[0023] In the thermo-acoustic device 30 of the present embodiment, since the substrate 308 includes at least one groove 308a 'the groove 308a can reflect the heat The sound waves emitted by the acoustic element 102 are caused to enhance the vocal intensity of the thermoacoustic device 30 on the side of the thermoacoustic element 102. When the distance between the adjacent grooves 308a is close to zero, the substrate 308 can support both the thermoacoustic element 102 and the maximum surface area of the thermoacoustic element 1〇2 in contact with the surrounding medium. [0024] Ο It can be understood that when the depth of the groove 3〇8a reaches a certain value, the sound wave reflected by the groove 308a is superimposed with the original sound wave, thereby causing destructive interference, affecting the sounding effect of the thermo-acoustic element 102. . To avoid this, it is preferable that the depth of the groove 3〇8a is less than or equal to 丨〇 mm. In addition, when the depth of the groove 308a is too small, the thermally audible element 102 suspended by the substrate 308 is too close to the substrate 308, which is disadvantageous for heat dissipation of the thermoacoustic element 102. Therefore, preferably, the depth of the groove 308a is 10 μm or more. Ο Referring to FIG. 8 and FIG. 9 'A fourth embodiment of the present invention provides a thermo-acoustic device 40. The difference between the thermo-acoustic device 40 provided in this embodiment and the thermo-acoustic device 20 provided in the second embodiment is that, in the embodiment, the substrate 408 of the thermo-acoustic device is a mesh structure. The substrate 408 includes a plurality of first linear structures 408a and a plurality of second linear structures 408b. The linear structure may also be a strip or strip structure. The plurality of first linear structures 408a and the plurality of second linear structures 4〇8b are disposed to intersect each other to form a base 408 having a mesh structure. The plurality of first linear structures 408a may or may not be parallel to each other, and the plurality of second linear structures 408b may be parallel to each other, or may be 100112575 Form No. A0101 Page 11 / Total 58 Pages 1002020944-0 201240486 are not parallel to each other, when the plurality of first linear structures 4〇8a are parallel to each other, and the plurality of second linear structures 408b are parallel to each other, specifically, the axes of the plurality of first linear structures 4 0 8 a The directions of the extensions are all along the first direction L1, and the distances between the adjacent first linear structures 408a may be equal or unequal. The distance between the adjacent two first linear structures 408a is not limited, and preferably, the pitch is 1 cm or less. In this embodiment, the plurality of first linear structures 408a are equally spaced apart, and the distance between the adjacent two first linear structures 408a is 2 cm. The plurality of second linear structures 408b are spaced apart from each other and extend substantially in the second direction L2 in the axial direction, and the distance between the adjacent second linear structures 4〇8b may be equal or unequal. The distance between the adjacent two second linear structures 408b is not limited, and preferably, the pitch is less than or equal to 1 cm. The first direction L1 forms an angle α with the second direction L2, and α is greater than 0 degrees and less than or equal to 90 degrees. In this embodiment, the angle between the first direction L1 and the second direction L2 is 90°. The manner in which the plurality of first linear structures 408a are disposed to intersect the plurality of second linear structures 408b is not limited. In this embodiment, the first linear structure 408a and the second linear structure 408b are woven together to form a mesh structure. In another embodiment, the plurality of spaced apart second linear structures 408b are disposed on the same side of the plurality of first linear structures 408a. The contact portion of the plurality of second linear structures 408b and the plurality of first linear structures 408a may be fixedly disposed by a bonding agent, or may be fixedly disposed by soldering. When the melting point of the first linear structure 408a is low, The second linear structure 408b and the first linear structure 408a may also be fixedly disposed by hot pressing. [0026] The substrate 408 has a plurality of cells 4 0 8 c. The plurality of cells 4 0 8 c 100112575 Form No. A0101 Page 12 / Total 58 pages 1002020944-0 201240486 Ο [0027] The plurality of first linear structures 408a and a plurality of second lines are disposed by crossing each other Structure 408b is enclosed. The mesh 408c is quadrangular. The mesh 408c may be square, rectangular or diamond-shaped depending on the angle at which the intersection of the plurality of first linear structures 408a and the plurality of second linear structures 408b are disposed. The size of the mesh 408c is determined by the distance between the adjacent two first linear structures 408a and the distance between the adjacent two second linear structures 408b. In this embodiment, the plurality of first linear structures 408a and the plurality of second linear structures 408b are disposed in parallel at equal intervals, and the plurality of first linear structures 408a and the plurality of second linear structures are The 408b are perpendicular to each other, so the mesh 408c is square and has a side length of 2 cm. The diameter of the first linear structure 408a is not limited, and is preferably 1 μm to 5 mm. The material of the first linear structure 408a is made of an insulating material including fibers, plastics, resins or silicones. The first linear structure 408a may be a textile material. Specifically, the first linear structure 4〇8a may include one or more kinds of plant fibers, animal fibers, wood fibers, and mineral fibers, such as cotton and twine. , wool, stupid silk, nylon thread or teaching. Preferably, the insulating material should have a certain heat resistance and flexibility such as nylon or polyester. Alternatively, the first linear structure 408a may be a conductive wire having an insulating layer on its outer surface. The conductive filaments may be wire or nanocarbon line-like structures. The metal includes a metal element or an alloy, and the elemental metal may be ingot, copper, town, molybdenum, gold, titanium, money, palladium or ruthenium, etc., and the metal alloy may be an alloy of any combination of the above elemental metals. The material of the insulating layer may be a resin, a plastic, a dioxin or a metal oxide. In this embodiment, the first linear structure 408a is a surface 100112575 Form No. A0101 Page 13 / 58 pages 1002020944-0 201240486 A carbon nanotube-like structure coated with cerium oxide, an insulating layer composed of cerium oxide The nanocarbon line-like structure is wrapped to constitute the first linear structure 408a. [0028] The structure and material of the second linear structure 408b are the same as those of the first linear structure 408a. In the same embodiment, the structure and material of the second linear structure 408b may be the same as or different from the structure and material of the first linear structure 408a. In this embodiment, the second linear structure 408b is a nanocarbon line-like structure whose surface is coated with an insulating layer. [0029] The nanocarbon line-like structure includes at least one nanocarbon line including a plurality of carbon nanotubes. The carbon nanotubes may be one or more of a single-walled carbon nanotube, a double-walled carbon nanotube, or a multi-walled carbon nanotube. The nanocarbon line may be a pure structure composed of a plurality of carbon nanotubes. When the nanocarbon line-like structure includes a plurality of nanocarbon lines, the plurality of nanocarbon lines may be disposed in parallel with each other. When the nanocarbon line-like structure includes a plurality of nanocarbon lines, the plurality of nanocarbon lines may be spirally wound with each other. The plurality of carbon nanotubes in the nanocarbon line-like structure can also be fixed to each other by a binder. [0030] The nanocarbon line may be a non-twisted nano carbon line or a twisted carbon carbon line. Referring to Fig. 10, the non-twisted nanocarbon pipeline includes a plurality of carbon nanotubes extending along the length of the nanocarbon pipeline and connected end to end. Preferably, the non-twisted nanocarbon pipeline comprises a plurality of carbon nanotube segments, the plurality of carbon nanotube segments being connected end to end by van der Waals, and each of the carbon nanotube segments comprises a plurality of mutually parallel and A carbon nanotube that is tightly bonded by van der Waals. That is, the non-twisted nanocarbon line includes a plurality of carbon nanotubes extending in the same direction. 100112575 in the direction of extension Form No. A0101 Page 14 of 58 1002020944-0 201240486 Carbon nanotubes are connected to each other by van der Waals force. The carbon nanotube segments have any length, thickness, uniformity, and shape. The length of the non-twisted nanocarbon line is not limited, and the diameter is 〇5 nm to 1 〇〇 micrometer. [0031] The twisted nanocarbon line is obtained by twisting the non-twisted nanocarbon line in the opposite direction using a mechanical force. Referring to Figure U, the twisted nanocarbon pipeline includes a plurality of carbon nanotubes arranged in an axial spiral arrangement around a carbon nanotube. Preferably, the twisted nanocarbon pipeline comprises a plurality of carbon nanotube segments, the plurality of carbon nanotube segments being connected end to end by van der Waals, and each of the carbon nanotube segments comprises a plurality of mutually parallel and A carbon nanotube that is tightly bonded by van der Waals. The carbon nanotube segments have any length, thickness, uniformity, and shape. The twisted carbon nanotube wire is not limited in length and has a diameter of 〇.5 nm to ι〇〇μm. The nano carbon pipeline and its preparation method can be found in Fan Shoushan et al. in the Republic of China, "Year of the Year, 5, 5, 5, and 5," in Taiwan, November 1, 1997, No. 1303239, Taiwan Announced Patent "A Nano Carbon tube rope and its manufacturing method", the patentee: Hon Hai Precision Industry Co., Ltd., and Taiwan No. 1312337 announced on July 21, 1998, the Taiwan Announced Patent "Nano Carbon Tube and Its Manufacturing Method, Patent Right Person: Hon Hai Precision Industry Co., Ltd. In order to save space, only the above is cited, but all the technical disclosures of the above application should also be considered as part of the disclosure of the present application. [0032] The thermal sound generating device 4 provided in this embodiment adopts a mesh structure of the substrate 4 8 having the following advantages: First, the mesh structure includes a plurality of meshes, and at 5, the sound emitting element 102 provides support. At the same time, the thermo-acoustic element 〇2 can have a large contact area with the peripheral solid medium. Second, the base 408 of the mesh structure can have better flexibility. Therefore, the thermoacoustic device 100112575 Form No. 1010101 Page 15 of 58 1002020944-0 201240486 40 has good flexibility. Third, when the first linear structure 408a or/and the second linear structure 408b includes a nanocarbon line-like structure coated with an insulating layer, the nanocarbon line-like structure may have a smaller diameter. The contact area of the thermo-acoustic element 102 with the surrounding medium is further increased; the nanocarbon line-like structure has a smaller density, and therefore, the mass of the thermo-acoustic device 40 can be smaller; the nano-carbon line structure is better The flexibility can be bent multiple times without being damaged, and therefore, the thermo-acoustic device 40 can have a longer service life. [0033] It can be understood that the mesh structure of the substrate 408 in this embodiment can also be woven by at least one of the above various linear structures. When the substrate 408 includes a linear structure, the one linear structure can be bent and folded to form a mesh structure. Referring to FIG. 12, a fifth embodiment of the present invention provides a thermo-acoustic device 50. The difference between the thermo-acoustic device 50 provided in this embodiment and the thermo-acoustic device provided in the second embodiment is that, in the embodiment, the substrate 508 of the thermo-acoustic device 50 is a carbon nanotube composite structure. [0035] The carbon nanotube composite structure includes a carbon nanotube layer and a layer of insulating material coated on the surface of the carbon nanotube layer. The carbon nanotube layer includes a plurality of uniformly distributed carbon nanotubes. The carbon nanotube may be one or more of a single-walled carbon nanotube, a double-walled carbon nanotube, and a multi-walled carbon nanotube. The carbon nanotubes in the carbon nanotube layer can be tightly bonded by van der Waals force. The carbon nanotubes in the carbon nanotube layer are disordered or ordered. The disordered arrangement here means that the arrangement direction of the carbon nanotubes is irregular, and the ordering arrangement here means that at least most of the arrangement of the carbon nanotubes has a certain regularity. Specifically, when the carbon nanotube layer includes a disordered arrangement of carbon nanotubes, Nai 10012575 Form No. A0101 Page 16 / 58 pages 1002020944-0 201240486 〇 [0036] The carbon nanotubes can be entangled or entangled with each other Isotropic arrangement; when the nanometer _ includes the ordered arrangement of carbon nanotubes, the carbon nanotubes are arranged in a preferred orientation along one direction or in a plurality of directions. The thickness of the carbon nanotube layer may be not more than π of G. 5 nm to 1 cm. Preferably, the core of the carbon nanotube layer may be micron] mm. The carbon nanotube layer is further coated with a number of micropores. The micropores are formed by a gap between the carbon nanotubes. The pore size of the micropores in the nanocarbon layer may be 5 μm or less. The layer can include at least a layer of carbon nanotube film, a carbon tube film, and a carbon nanotube film. τ Referring to Fig. 13, the carbon nanotube film comprises a plurality of carbon nanotubes connected to each other by van der Waals force. The plurality of carbon nanotubes are arranged in a preferred orientation along the same direction. The preferred orientation means that the overall extension direction of most of the carbon nanotubes in the carbon nanotube film is substantially in the same direction. Moreover, the overall extension direction of the majority of the carbon nanotubes is substantially parallel to the surface of the carbon nanotube film, and the carbon nanotube film is: Van der Waals is connected end to end. Specifically, the carbon nanotubes of the carbon nanotubes are substantially in the same direction as the carbon nanotubes of the majority of the carbon nanotubes. The adjacent carbon nanotubes in the extending direction are connected end to end by the van der Waals force. Although there are a few random U-tubes in the carbon nanotube film, these carbon nanotubes do not significantly affect the overall orientation of the nano-carbon film in the carbon nanotube film. The nano tube is a self-supporting film. The self-supporting flutter is a carbon nanotube film that does not (5) require a large area of the support of the support, and as long as the support thrust is provided on both sides, the suspension can be maintained as a whole, and the nano carbon S film is placed ( Or fixed to the interval - two distances set by distance 100112575 Form No. A0101 Page 17 / Total 58 pages 1002020944-0 201240486 On the support, the carbon nanotube film between the two supports can be suspended to keep itself Membrane state. The self-supporting is mainly achieved by the presence of continuous carbon nanotubes extending through the end-to-end extension of the van der Waals force in the carbon nanotube film. [0037] The thickness of the carbon nanotube film It can be from 0.5 nm to 100 μm, and the width and length are not limited, and it is set according to the size of the second substrate 108. The specific structure of the carbon nanotube film and its preparation method can be found in Fan Shoushan et al. In the case of the application for the 12th, the Republic of China announced the patent No. 1 3271 77 of the Republic of China on July 11, 1999. To save space, only the above is cited, but all the technical disclosures of the application should also be regarded as the technical disclosure of the present application. a part of [0038] When the carbon nanotube layer comprises a plurality of layers of carbon nanotube film, the angle of intersection formed between the extending directions of the carbon nanotubes in the adjacent two layers of carbon nanotube film is not limited. Referring to Fig. 14, the carbon nanotube flocculation membrane is a carbon nanotube membrane formed by a flocculation method, and the carbon nanotube flocculation membrane comprises carbon nanotubes which are intertwined and uniformly distributed. The carbon nanotubes are mutually attracted and entangled by van der Waals to form a network structure. The carbon nanotube film is isotropic. The length and width of the carbon nanotube film are not limited. Because the carbon nanotubes are intertwined in the carbon nanotube flocculation membrane, the carbon nanotube flocculation membrane has good flexibility and is a self-supporting structure, which can be bent and folded into any shape without The area and thickness of the carbon nanotube flocculation membrane are not limited, and the thickness is 1 micrometer to 1 millimeter. The carbon nanotube flocculation membrane and the preparation method thereof can be found in Fan Shoushan et al. Application No. 100112575 published on November 16th, 1997. Form No. A0101 Page 18 of 58 Page 1002020944-0 201240486 200844041 Taiwan Provisional Patent Application "Preparation of Nano Carbon Tube Films". To save space, only the above is cited, but all the technical disclosures of the above application should also be considered as part of the disclosure of the present application. 0040] Referring to Fig. 15, the carbon nanotube rolled film comprises uniformly distributed carbon nanotubes, and the carbon nanotubes are arranged in the same direction or in different directions. The carbon nanotubes can also be isotropic. The carbon nanotubes in the carbon nanotube film are partially overlapped with each other and are attracted to each other by van der Waals force, and the Ο is tightly bonded. The carbon nanotubes in the carbon nanotube film are The surface of the growth substrate forming the carbon nanotube array forms an included angle of 5, wherein the sum is greater than or equal to 0 degrees and less than or equal to 15 degrees. The carbon nanotubes in the carbon nanotube rolled film have different arrangements depending on the manner of rolling. When rolled in the same direction, the carbon nanotubes are arranged in a preferred orientation along a fixed orientation. It will be appreciated that the carbon nanotubes may be arranged in a preferred orientation along a plurality of directions when rolled in different directions. The thickness of the carbon nanotube rolled film is not limited, and is preferably 1 μm to 1 mm. The area of the carbon nanotube rolled film is not limited, and is determined by the size of the carbon nanotube array that is rolled out of the film. When the size of the carbon nanotube array is large, a large area of the carbon nanotube rolled film can be crushed. The carbon nanotube rolling film and its preparation method can be found in Fan Shoushan et al., which was filed on June 29, 1996, and announced on December 21, 1999 in Taiwan No. 1334851, Taiwan Announced Patent "Nano Carbon Tube" Method for preparing a film". In order to save space, only the above is cited, but all the technical disclosures of the above application are also considered as part of the disclosure of the technology of the present application. The insulating material layer is located on the surface of the carbon nanotube layer, and the insulating material layer functions to insulate the carbon nanotube layer from the thermoacoustic element 102. The layer of insulating material is only distributed on the surface of the carbon nanotube layer, or the insulating material 100112575 Form No. 1010101 Page 19 of 581002020944-0 [0041] Each of the nanocarbons in the layer of carbon nanotubes tube. When the thickness of the insulating material layer is thin, the micropores in the carbon nanotube layer are not blocked, and therefore, the composite structure includes a plurality of micropores. The thermally-sounding element 102 is at least partially suspended relative to the plurality of micro-holes. The plurality of micropores provide a large contact area of the thermoacoustic element 102 with the outside. [0043] The thermo-acoustic device 5〇 provided by the embodiment adopts a carbon nanotube composite structure as the substrate 508, and has the following advantages: First, the nano-tube composite structure includes a carbon nanotube layer and a coating. The insulating material layer covering the surface of the carbon nanotube layer, because the carbon nanotube layer can be composed of a pure carbon nanotube, the carbon nanotube layer has a small density and a relatively low quality, therefore, the heat The sound generating device 50 has a small mass 'convenient application; secondly, the microporous layer in the carbon nanotube layer is composed of a gap between the carbon nanotubes, and the distribution is uniform, and in the case where the insulating material layer is thin, The carbon nanotube composite structure can maintain the uniformly distributed microporous structure, and therefore, the thermo-acoustic element 102 can be more uniformly contacted with the outside air through the substrate 508; third, the carbon nanotube layer has a good flexibility Sex, can be bent many times without being destroyed, so 'the carbon nanotube composite structure has better flexibility.' The thermo-acoustic device 50 using the carbon nanotube composite structure as the substrate 508 is a flexible sounding device. Can be set Any shape is not limited. Referring to Figures 16 and 17, a sixth embodiment of the present invention provides a thermo-acoustic device 60 that includes a substrate 6〇8, a uniform thermal device 104, and a thermo-acoustic component 1〇2. The heating device 1〇4 includes a plurality of first electrodes 104a and a plurality of second electrodes 1〇4b, and the plurality of first electrodes 104a and the plurality of second electrodes 1〇4b and the thermo-acoustic element 102, respectively Electrical connection. 100112575 Form No. A0101 Page 20 of 58 1002020944-0 201240486 [0044] The plurality of first electrodes 104a and a plurality of second electrodes 104b are alternately disposed on the substrate 608. The thermo-acoustic element 102 is disposed on the plurality of first electrodes 104a and the plurality of second electrodes 104b, such that the plurality of first electrodes 104a and the plurality of second electrodes 104b are located on the substrate 608 and the thermo-acoustic components Between 102, the thermally audible element 102 is partially suspended relative to the substrate 608. That is, the plurality of first electrodes 104a, the plurality of second electrodes 104b, the thermally audible elements 102, and the substrate 608 are collectively formed with a plurality of gaps 601, thereby causing the thermally audible elements 102 to have a relatively large contact area with the surrounding air. The distance between each of the adjacent first electrodes 104a and 2b may be equal or unequal. Preferably, the distance between each adjacent first electrode 104a and the second electrode 104b is equal to the distance between the adjacent first electrode 104a and the second electrode 104b, preferably 10 micrometers to 1 cm. [0045] The substrate 608 mainly functions to carry the first electrode 104a and the second electrode. The shape and size of the substrate 608 are not limited to materials which are insulating materials or materials having poor electrical conductivity. In addition, the material of the substrate 6〇8 should have better thermal insulation properties, thereby preventing the heat generated by the thermoacoustic element 102 from being absorbed by the substrate 608, and failing to achieve the purpose of heating the surrounding medium and then vocalizing. In this embodiment, the material of the substrate 608 may be a broken fill, a tree, or the like. 5厘米的厚度为1毫米。 In the present embodiment, the substrate 6〇8 is a square frangible plate having a side length of 4.5 cm and a thickness of 1 mm. The gap 601 is defined by a first electrode 104a, a second electrode 1〇, and the height of the gap 601 depends on the heights of the first electrode 1〇4 and the second electrode 104b. In the present embodiment, the height of the first electrode 1〇4 and the second electrode 104b ranges from 1 μm to 1 cm. Preferably, '100112575 Form No. A0101 Page 21 of 58 1002020944-0 201240486 The height of one electrode 104a and the second electrode 104b is 15 microns. [0047] The first electrode 104a and the second electrode 104b may be layered (filament or strip), rod, strip, block or other shape, and the cross section may be round or square. , trapezoids, triangles, polygons, or other irregular shapes. The first electrode 104a and the second electrode 104b may be fixed to the substrate 608 by bolting or bonding of a bonding agent or the like. In order to prevent the heat of the thermo-acoustic element 102 from being excessively absorbed by the first electrode 104a and the second electrode 104b, the contact area of the first electrode 104a and the second electrode 104b with the thermo-acoustic element 102 is small. Therefore, the shape of the first electrode 104a and the second electrode 104b is preferably a filament shape or a ribbon shape. The material of the first electrode 104a and the second electrode 104b may be selected from a metal, a conductive paste, a conductive paste, indium tin oxide (ITO), a carbon nanotube or a carbon fiber. When the material of the first electrode 104a or the second electrode 104b is a carbon nanotube, the first electrode 104a or the second electrode 104b may have a nanocarbon line structure. The structure of the nanocarbon line-like structure is the same as that of the nanocarbon line-like structure provided in the fourth embodiment. Since the carbon nanotubes in the nanocarbon line-like structure are connected end to end, the nanocarbon line-like structure has good electrical conductivity and can be used as an electrode. [0048] The thermo-acoustic device 60 further includes a first electrode lead 610 and a second electrode lead 612, and the first electrode lead 610 and the second electrode lead 612 are respectively associated with the first electrode 104a of the thermo-acoustic device 60. The second electrode 104b is connected to the second electrode 104b, and the plurality of first electrodes 104a are electrically connected to the first electrode lead 610, and the plurality of second electrodes 104b are electrically connected to the second electrode lead 61 2, respectively. The thermoacoustic device 60 is electrically connected to an external circuit through the first electrode lead 610 and the second electrode lead 612. Such a connection 100112575 Form No. A0101 Page 22/58 page 1002020944-0 201240486 [0049] The splicing method can make the block of the thermally audible element 102 between the first electrode lead 61 〇 and the second electrode lead 612 and greatly By reducing, the sounding efficiency of the thermoacoustic element 102 can be improved. In this embodiment, the plurality of first electrodes 1〇4a and the plurality of second electrodes 104b can function to support the thermoacoustic elements 1〇2, and therefore, the substrate 608 is not an essential element. When the thermo-acoustic device 6 in the present embodiment does not include the substrate 608, the first electrode 104a and the second electrode i〇4b can also protect the thermo-acoustic element 102 while being electrically connected to an external circuit. Supports the thermoacoustic element 1〇2. In the embodiment, the first electrode 104a and the second electrode i4b are filamentary silver electrodes formed by a screen printing method. The number of the first electrodes 1〇4a is four, and the number of the second electrodes 104b is four, and the four first electrodes i〇4a and the four second electrodes 104b are alternately and equally spaced from the substrate 6〇8. Each of the first electrode 104a and the second electrode 1〇4b has a length of 3 cm and a height of 15 μm. The distance between the adjacent first electrode 104a and the second electrode i〇4b is 5 mm. . [0051] In the thermo-acoustic device 60 provided in this embodiment, the thermo-acoustic element 102 is suspended by a plurality of first electrodes 104a and a plurality of second electrodes 104b, and the thermo-acoustic component 1〇2 is added. The contact area of the surrounding air facilitates heat exchange between the thermo-acoustic element 1〇2 and the surrounding air, improving the vocalization efficiency. [0052] Referring to FIG. 18 and FIG. 19, a seventh embodiment of the present invention provides a thermo-acoustic sounding device 70. . The thermal sounding device 7A includes a substrate 608, a uniform thermal device 104, and a thermoacoustic element 1〇2. The heating device 104 includes a plurality of 100112575 form numbers A0101, 23 pages, 58 pages, 1002020944-0 201240486 first electrodes 10a4a and a plurality of second electrodes 104b, the plurality of first electrodes 104a and a plurality of second The electrodes 104b are electrically connected to the thermo-acoustic elements 102, respectively. The thermoacoustic element 102 includes a graphene film. The thermo-acoustic device 70 provided in this embodiment has substantially the same structure as the thermo-acoustic device 60 provided in the sixth embodiment, except that in the present embodiment, two adjacent first electrodes 104a and second are provided. At least one spacer element 714 is further included between the electrodes 104b. [0053] The spacer element 714 and the substrate 608 can be separate components that are secured to the substrate 608 by, for example, bolting or adhesive bonding. Alternatively, the spacer element 714 can be formed integrally with the substrate 608, i.e., the material of the spacer element 714 is the same as the material of the substrate 608. The spacer element 714 is not limited in shape and may be in the form of a sphere, a filament or a ribbon. In order to maintain the thermal sounding element 102 with a good vocalization effect, the spacer element 714 should have a smaller contact area with the thermally audible element 102 while supporting the thermoacoustic element 102, preferably the spacer element 714 and the thermal vocalization The elements 102 are in point or line contact. In the present embodiment, the material of the spacer member 714 is not limited, and may be an insulating material such as glass, terracotta or resin, or a conductive material such as a metal, an alloy or an indium tin oxide. When the spacer element 714 is a conductive material, it is electrically insulated from the first electrode 104a and the second electrode 104b, and, preferably, the spacer element 714 is parallel to the first electrode 104a and the second electrode 104b. The height of the spacer element 714 is not limited, and is preferably 10 micrometers to 1 centimeter. In the present embodiment, the spacer member 714 is a filament-like silver formed by a screen printing method, and the height of the spacer member 714 is the same as the height of the first electrode 104a and the second electrode 104b, and is 20 μm. The spacer element 714 is disposed in parallel with the first electrode 100112575 form number A0101 page 24/58 page 1002020944-0 201240486 104a and the second electrode 10b4 due to the height of the spacer element 714 and the first electrode 104a and the second electrode The height of 104b is the same, so the thermo-acoustic elements 1〇2 are located on the same plane. [0055] The thermo-acoustic element 102 is disposed on the spacer element 714, the first electrode 104a, and the second electrode 104b. The thermoacoustic element 102 is spaced apart from the substrate 608 by the spacer element 714, and forms a space 701 with the substrate 608, the space 701 being the first electrode 104a or the second electrode 104b, the spacer element 714, substrate 608 and thermally audible element 102 are formed together. Further, in order to prevent the thermoacoustic element 1〇2 from generating a standing wave' to maintain a good sounding effect of the thermoacoustic element 102, the distance between the thermoacoustic element 102 and the substrate 608 is preferably 10 μm to 1 cm. In this embodiment, since the heights of the first electrode 104a, the second electrode 104b, and the spacer element 714 are 20 micrometers, the thermoacoustic element 1〇2 is disposed on the first electrode 104a and the second electrode 104b and The spacer element 714, thus the distance between the thermoacoustic element 1〇2 and the substrate 608 is 20 microns. [0056] It can be understood that the first electrode 104a and the second electrode 104b also have a certain supporting effect on the thermo-acoustic element 102, but between the first electrode 104a and the second electrode 104b When the distance is large, the support effect on the thermo-acoustic element 1 〇 2 is not good, and the spacer 714 ′ is provided between the first electrode 1 〇 4 a and the second electrode 1 〇 4 b to provide better support for heat. The function of the sounding element 1〇2 is such that the thermo-acoustic element 102 is spaced from the substrate 608 and forms two spaces 〇1' with the substrate 608 to ensure that the thermo-acoustic element 1〇2 has a good vocalization effect. 4 See Fig. 2G' The first embodiment of the present invention provides a thermoacoustic device 100112575. The Hi-fi sounding device includes at least one heating device and a plurality of form numbers AG101^25%/% 58 I 1002020944-0 [0057] 201240486 Thermal sounding elements. The plurality of thermo-acoustic elements include two types: first, the number of the plurality of thermo-acoustic elements is at least two, and the thermo-acoustic elements are not in contact with each other; and second, the plurality of thermal-induced sounds The number of components is one, and the thermo-acoustic component is disposed on a substrate having a curved surface such that a plurality of normal directions are formed or the thermo-acoustic components are bent and disposed on different planes. The heating means may correspond to the thermo-acoustic elements one-to-one, or one heating means may correspond to a plurality of thermo-acoustic elements. The heating means may also be a unitary structure consisting of a plurality of portions corresponding to the plurality of thermally audible elements. In the present embodiment, the thermo-acoustic device 80 includes a first heating device 804, a second heating device 806, a substrate 208, a first thermo-acoustic component 8〇23, and a second thermo-acoustic component. 802b. [0058] The substrate 208 includes a first surface (not labeled) and a second surface (not labeled). The shape, size and thickness of the substrate 208 are not limited. The first surface and the second surface may be flat, curved or uneven surfaces. The first surface and the second surface may be adjacent two surfaces or may be opposite surfaces. In this embodiment, the substrate 2〇8 is a rectangular parallelepiped structure, and the first surface and the second surface are two opposite surfaces. The substrate 208 further includes a plurality of through holes 208a penetrating the first surface and the second surface such that the first surface and the second surface become uneven surfaces. The plurality of through holes 208a may be disposed in parallel with each other. [0059] The first thermo-acoustic component 80 2a is disposed on the first surface of the substrate 208 and is at least partially suspended relative to the first surface. The second thermal sounding element 802b is disposed on the second surface and is at least partially suspended relative to the second surface 100112575 Form No. A0101 Page 26 of 58 1002020944-0 201240486 咕. The first thermo-acoustic element 802a is a graphene film. The second thermoacoustic element 802b is a graphene film or a nano tube breaking layer. The structure of the nano-tube layer is the same as that of the carbon nanotube layer disclosed in the fifth embodiment. Since the carbon nanotube layer comprises at least one wide nano-plate, the thickness of the nano-tube layer is smaller and has a smaller heat per unit area. Therefore, the carbon nanotube layer can also be used as a thermo-acoustic element. [〆6〇] The second heating device 804 includes a first electrode 104a and a second electrode 104b. The first electrode 104a and the second electrode 104b are electrically connected to the first thermo-acoustic element 802a, respectively. In this embodiment, the first electrode 104a and the second electrode 104b are respectively disposed on the surface of the first thermo-acoustic element 8〇2a and are flush with the opposite sides of the first thermo-acoustic element 802a. The second heating device 8A includes a first electrode i4a and a second electrode 10b. The first electrode 104a and the second electrode 1b4b are electrically connected to the second thermo-acoustic element 802b, respectively. In this embodiment, the first electrode 104a and the second electrode 104b are respectively disposed on the surface of the rib of the second thermoacoustic element (10), and opposite sides of the first thermo-acoustic element 802a-ip* [0061] The thermo-acoustic device 8 provided in this embodiment is a double-sided sounding device, and the sound-transmitting range emitted by the thermo-acoustic element can be made larger by providing a thermo-acoustic element on two different surfaces. And more clearly. It is possible to control the heating device to make any of the heat-producing sounds sound, or at the same time: the sound 'to make the heat-sounding device more widely used. Further, when a thermo-acoustic component fails, another thermo-acoustic component can continue to work, improving the thermal-induced sound 100112575 Form No. A0101 Page 27 of 58 page 1002020944-0 201240486 device Service life. Referring to FIG. 21, a ninth embodiment of the present invention provides a thermo-acoustic sounding device 90. The thermo-acoustic device 90 of the present embodiment is different from the structure of the thermo-acoustic device 80 of the eighth embodiment in that the thermo-acoustic device 90 provided in this embodiment is a multi-faceted sound-emitting device. [0063] In this embodiment, the substrate 908 is a rectangular parallelepiped structure including four different surfaces, which are rugged surfaces. The thermo-acoustic device 90 includes four thermo-acoustic elements 102, one of which is a graphene film, and the other three of the thermo-acoustic elements 102 may be a graphene film or a carbon nanotube. Floor. [0064] Each of the heating devices 104 includes a first electrode 104a and a second electrode 104b, respectively. The first electrode 104a and the second electrode 104b are electrically connected to a thermo-acoustic element 102, respectively. [0065] The thermo-acoustic device 90 provided in this embodiment can realize the propagation of sound in a plurality of directions. Referring to FIG. 22, a tenth embodiment of the present invention provides a thermo-acoustic device 100. The thermoacoustic device 100 includes a thermo-acoustic component 102, a substrate 208, and a uniform thermal device 1 004. The thermally audible element 102 is disposed on the substrate 208. The difference between the structure of the thermo-acoustic device 100 provided in this embodiment and the thermo-acoustic device 20 provided in the second embodiment is that in the thermo-acoustic device 100 provided in the embodiment, the heating device 1004 is a laser. , or other electromagnetic wave signal generating device. The electromagnetic wave signal 1 020 emitted from the heating device 1 004 is transmitted to the thermo-acoustic element 102, and the thermo-acoustic element 102 sounds. 100112575 Form No. A0101 Page 28 of 58 1002020944-0 201240486. [0067] The heating device 1 004 can be placed in the thermoacoustic element 102. When the heating device 1 004 is a laser, when the substrate 2 〇 8 is a transparent substrate, the laser device can be disposed corresponding to the surface of the substrate 208 away from the thermo-acoustic element 1 〇 2, thereby A laser beam emitted from the laser is transmitted through the substrate 2 to 8 to the thermoacoustic element 102. In addition, when the electromagnetic device 1 〇〇 4 emits an electromagnetic wave signal, the electromagnetic wave signal can be transmitted to the thermo-acoustic element 1 〇 2 through the substrate 2 , 8 , and at this time, the heating device 1004 can also correspond to The substrate 208 is disposed away from the surface of the thermo-acoustic element 1〇2. In the thermoacoustic device 100 of the present embodiment, when the thermoacoustic element 1〇2 is irradiated with electromagnetic waves such as a laser, the thermoacoustic element 丨〇2 is excited by absorbing the energy of the electromagnetic wave, [0068] The absorbed light energy is converted into heat in whole or in part by non-radiation. The temperature of the thermoacoustic element 1 〇 2 varies according to the frequency and intensity of the electromagnetic wave signal 1020, and is rapidly exchanged with the surrounding air or other gas or liquid medium, so that the temperature of the surrounding medium also generates an equal frequency. The change causes the surrounding medium to expand and contract rapidly, thereby making a sound. 〇[0069] Since the thermal sound generating device works by converting a certain form of energy into heat at a very fast rate and performing rapid heat exchange with the surrounding gas or liquid medium, the medium expands and contracts, thereby Make noise. It can be understood that the energy form is not limited to electric energy or light energy, and the heating device is not limited to the electrode or electromagnetic wave signal generator in the above embodiment, and any of the thermo-acoustic elements can be heated and heated according to audio changes. The means of surrounding medium can be considered as a consistent thermal device and is within the scope of the present invention. [0070] 100112575 The graphene film of the present invention has good toughness and mechanical strength, so the form number A0101 page 29/58 page 1002020944-0 201240486 can be conveniently made into heat of various shapes and sizes. Sound device. The thermoacoustic device of the present invention can be used not only as a speaker alone but also conveniently in various electronic devices requiring a sounding device. The thermal squealing device can be built in the housing of the electronic device or on the outer surface of the housing as a sounding unit of the electronic device. The thermoacoustic device can replace the traditional sounding unit of the electronic device, and can also be used in combination with a conventional sounding single. The thermoacoustic device can be used in conjunction with other electronic components of the electronic device or a utility processor or the like. It can also be connected to the electronic device through a wired or wireless method, such as a signal transmission line and a USB interface of the electronic device, and a wireless method such as a blue tooth connection with the electronic device. The thermoacoustic device can also be mounted or integrated on the display screen of the electronic device as a sounding unit of the electronic device. The electronic device can be an audio, a mobile phone, an MP3, an MP4, a game console, a digital camera, a digital video camera, a television or a computer. For example, when the electronic device is a mobile phone, since the thermo-acoustic device provided by the embodiment is a transparent structure, the thermo-acoustic device can be attached to the surface of the display screen of the mobile phone by mechanical fixing or adhesive. When the electronic device is Mp3, the thermo-acoustic device can be built in the MP3 and electrically connected to the circuit board inside the MP3. When the MP3 is powered on, the thermo-acoustic device can emit sound. [0071] In summary, this It has clearly stated that it has met the requirements of the invention patent and has filed a patent application in accordance with the law. However, the above description is only a preferred embodiment of the present invention, and the scope of the patent application of the present invention is not limited thereto. Equivalent modifications or variations made by those skilled in the art of the present invention in light of the spirit of the present invention are intended to be included within the scope of the following claims. 100112575 Form No. Α01-01 Page 30 of 58 1002020944-0 201240486 [Simple Description of the Drawings] [0072] Fig. 1 is a plan view of a thermo-acoustic device according to a first embodiment of the present invention. 2 is a cross-sectional view taken along line 11 - 11 of FIG. 1. 3 is a top plan view of a thermo-acoustic device according to a second embodiment of the present invention. 4 is a cross-sectional view taken along line IV-IV of FIG. 3. 5 is a top plan view of a thermo-acoustic device according to a third embodiment of the present invention. [ Fig. 6] Fig. 6 is a cross-sectional view taken along line VI-VI of Fig. 5 in a case of the third embodiment. Figure 7 is a cross-sectional view taken along line VI-VI of Figure 5 in another case of the third embodiment. 8 is a top plan view of a thermo-acoustic device according to a fourth embodiment of the present invention. 9 is a cross-sectional view taken along line IX-IX of FIG. 8. [0081] FIG. 10 is a scanning electron micrograph of a non-twisted nanocarbon line-like structure employed in the thermoacoustic device of FIG. [0082] FIG. 11 is a scanning electron micrograph of a twisted nanocarbon line-like structure employed in the thermoacoustic device of FIG. 12 is a side cross-sectional view showing a thermoacoustic device using a carbon nanotube layer coated with an insulating layer as a substrate according to a fifth embodiment of the present invention. [0084] FIG. 1 is a scanning electron micrograph of a carbon nanotube film taken by the carbon nanotube layer of FIG. [0085] FIG. 14 is a 100112575 scanning electron micrograph of a carbon nanotube flocculation film used in the carbon nanotube layer of FIG. Form No. A0101 Page 31 of 58 1002020944-0 201240486 [0086] FIG. 1 is a scanning electron micrograph of a carbon nanotube rolled film used in the carbon nanotube layer of FIG. [0088] [0091] [0093] [0099] [0099] [0099] FIG. 16 is a sixth embodiment of the present invention. A top view of the thermo-acoustic device is shown in cross section taken along the line XV11-XVII in Fig. 16. Figure 18 is a plan view of a thermoacoustic device according to a seventh embodiment of the present invention. Figure 9 is a cross-sectional view taken along line XIX-XIX of Figure 18. Figure 20 is a side cross-sectional view showing a thermoacoustic device according to an eighth embodiment of the present invention. Figure 21 is a side cross-sectional view showing a thermoacoustic device according to a ninth embodiment of the present invention. Figure 22 is a side view of a thermoacoustic device according to a tenth embodiment of the present invention. [Main component symbol description] Thermoacoustic device: 10; 20; 30; 40; 50; 60; 70; 80; 90; Sounding element: 102 Heating device: 104; 1004 First electrode: 104a Second electrode: 104b Substrate: 208; 308; 408; 508; 608; 908 Form number A0101 Page 32 of 58 page 1002020944-0 201240486 ' [0100] Hole: 208a [0101] Slot: 308a [0102] Surface: 308b [0103] First line structure: 408a [0104] Second line structure: 408b [0105] Mesh: 408c [0106] Gap: 601 [0107] First electrode lead: 610 [0108] Second electrode lead: 612 [0109] Spacer element: 714 [0110] First thermo-acoustic element: 802a [0111] Second thermo-acoustic element: 802b [0112] ] Ο First heat device: 804 [0113] Second heat device: 806 [0114] Electromagnetic wave signal: 1020 100112575 Form number A0101 Page 33 / Total 58 pages 1002020944-0

Claims (1)

201240486 VII. Patent application scope: 1. A thermo-acoustic device comprising a uniform heat device and a thermo-acoustic device for supplying energy to the thermo-acoustic component to generate heat of the thermo-acoustic component The improvement is that the thermoacoustic element comprises a graphite thin film. 2. The thermoacoustic device according to claim 1, wherein the graphene film comprises a plurality of layers of graphene which are overlapped or overlapped with each other. 3. The thermoacoustic device according to claim 1, wherein the graphene film is a single layer of graphene. 4. The thermoacoustic device according to claim 1, wherein the graphene film has a thickness of from 0.34 nm to 10 nm. 5. The thermoacoustic device according to claim 1, wherein the thermoacoustic device further comprises a substrate, the thermoacoustic element is disposed on a surface of the substrate, and the substrate includes at least one pass a hole, the thermo-acoustic element being suspended relative to the at least one through hole. 6. The thermoacoustic device according to claim 5, wherein the at least one through hole comprises a plurality of through holes or blind holes, and the thermo-acoustic element is opposite to the plurality of through holes or blind holes Dangling settings. 7. The thermoacoustic device according to claim 1, wherein the thermo-acoustic device further comprises a substrate, the thermo-acoustic element disposed on a surface of the substrate, the substrate comprising at least one blind The heat-sounding device is disposed on the surface, and the thermo-acoustic device is suspended from the blind groove or the channel. The thermo-acoustic device according to claim 1, wherein the 100112575 form number A0101 Page 34 of 58 1002020944-0 201240486 ίο .Ο 11 . 12 . Ο 13 100112575 The thermoacoustic device further includes a substrate, the thermoacoustic element being disposed on a surface of the substrate, the substrate being a mesh The structure includes a plurality of meshes, and the thermo-acoustic elements are suspended relative to the plurality of meshes. The thermal sound generating device of claim 8, wherein the substrate comprises a plurality of first linear structures and a plurality of second linear structures, the plurality of first linear structures and the plurality of second lines The structures are arranged to intersect each other to form the mesh structure. The thermoacoustic device of claim 1, wherein the heating device comprises at least a first electrode and at least a second electrode electrically connected to the thermo-acoustic element, respectively. The thermoacoustic device according to claim 1, wherein the heating device comprises a plurality of first electrodes and a plurality of second electrodes, and the first electrode and the second electrode are alternately spaced apart from each other and respectively The thermally audible elements are electrically connected. The thermo-acoustic device according to claim 11, wherein the plurality of first electrodes and the plurality of second electrodes are respectively a nano carbon line-like structure, and the nano carbon line-like structure is composed of a plurality of It consists of end-to-end carbon nanotubes. The thermoacoustic device according to claim 11, wherein the thermoacoustic element further comprises a substrate, the plurality of first electrodes and a plurality of second electrodes are disposed on a surface of the substrate, The thermo-acoustic element is disposed on the plurality of first electrodes and the plurality of second electrodes, and the plurality of first electrodes and the plurality of second electrodes are disposed between the thermo-acoustic element and the substrate A plurality of first electrodes and a plurality of second electrodes are suspended. The heat-inducing device according to claim 13, wherein the adjacent first electrode and the second electrode further include at least the thermo-acoustic device according to claim 13 of the present invention. a spacer element, the at least one spacer element being located between the thermo-acoustic element and the substrate. The thermo-acoustic device according to claim 1, wherein the heating device generates an electromagnetic wave signal Device. The thermal sound generating device of claim 15, wherein the heat generating device is a laser. An electronic device, wherein the sound-emitting device of the electronic device comprises the thermo-acoustic device according to any one of claims 1 to 16. 18. The electronic device of claim 17, wherein the thermo-acoustic device is built into the electronic device or directly disposed on an outer casing of the electronic device. 19. The electronic device of claim 17, wherein the thermo-acoustic device is connected to the electronic device via a USB interface or wirelessly connected to the electronic device via Bluetooth. The electronic device of claim 17, wherein the electronic device comprises an audio, a mobile phone, an MP3, an MP4, a game machine, a digital camera, a digital video camera, a television or a computer. 100112575 Form No. A0101 . 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