TW201240484A - Thermal acoustic device and electric device - Google Patents

Abstract

The present invention relates to a thermal acoustic device. The thermal acoustic device includes a substrate having a net structure, a thermal acoustic element disposing on a surface of the substrate, and a heater used to heat the thermal acoustic element. The substrate includes at least one linear structure including a linear carbon nanotube structure and an insulated coating coated on surface of the linear carbon nanotube structure. The thermal acoustic element includes a graphene film. The present invention further provides an electric device using the thermal acoustic device.

Description

201240484 *VI. Description of the Invention: [Technical Field] [0001] 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] 先前 ❹ [Prior Art] A 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 a signal input device to emit sound. The thermoacoustic device is one of the sounding devices, which is a thermoacoustic device based on the thermoacoustic effect, 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, Proceed i ngs of the Royal Society of London, Vol. 30, p408_411 (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 intensity, 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 in the document "The thermophone as a precision source of sound", Phys. Rev. 10, p22-38 (1 91 7), which employs A platinum sheet is used as a thermoacoustic element. Receptaments 100112573 Form No. A0101 Page 3 of 58 pages 1002020942-0 201240484 The material itself is limited to the use of the platinum sheet as a thermo-acoustic component of the thermoacoustic device, 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. 100112573 Form No. A0101 Page 4 of 58 1002020942-0 201240484 • [0009] The heating device 104 is used to supply energy to the thermo-acoustic element 1 〇 2, causing the thermo-acoustic element 1 〇 2 to generate heat, sound. In the present embodiment, the heating device 104 supplies electrical energy to the thermally audible elements to cause the thermally audible elements 102 to generate heat under the action of Joule heat. The heating device 1〇4 includes a first electrode 104a and a second electrode “b.” The first electrode 104a and the second electrode 104b are electrically connected to the thermo-acoustic element 1〇2, respectively. In the example, the first electrode 104a and the second electrode i〇4b are respectively disposed on the surface of the thermoacoustic element 102 and are flush with the opposite sides of the thermoacoustic element 丨〇2. 〇[(五)10] The first electrode 104a and the second electrode 104b in the thermal 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 rises to emit a sound. • 104a and the second electrode 10b4b may be layered (filament or strip), rod, strip, block or other shape, and the shape of the cross section is round, square, trapezoidal, triangular, Polygon or other irregular shape. The first electrode 104a and the second electrode 104b can be bonded to the surface of the thermoacoustic element 102 by bonding of the adhesive to prevent the heat of the thermoacoustic element 102 from being blocked. An electrode l〇4a and the second electrode 1〇41) are excessively absorbed to affect the sound generation The contact area between the first electrode 104a and the second electrode i〇4b and the thermally actuating element 102 is preferably small. Therefore, the shape of the second electrode 1 〇忉 and the second electrode 104b is preferably filiform. Or the strip shape. The material of the first electrode 104a and the second electrode 1〇4b may be selected from a metal, a conductive paste, a conductive crack, an indium tin oxide (ITO) or a carbon nanotube, etc. [0011] When an electrode 10a and a second electrode 10b have a certain intensity, the second electrode 104a and the second electrode i4b can support the heat-induced sound 70 pieces 100112573 Form No. A0101 Page 5 / 58 pages 1002020942Ό 201240484 [0012] [0014] The function of 100112573 102. If the first electrode 1" and the two ends of the second electrode are respectively fixed on the frame, the thermo-acoustic element 1 〇 2 is set at the first The electrode 1〇4a and the second electrode are difficult, and the thermo-acoustic element m is suspended by the first electrode 104a and the second electrode 1〇4b. In the present embodiment, the electrode 1 (electrode 1) and the second electrode are formed of a silver-like silver electrode formed on the thermoacoustic element ι 2 by a printing method such as screen printing. The thermo-acoustic device 1G further includes a first electrode lead (not shown) _ and a second electrode lead (not shown), and the first electrode lead and the first electrode lead are respectively associated with the thermo-acoustic device 1G. The first electrode 1〇4& and the second electrode are electrically connected such that the first electrode 1〇4a is electrically connected to the first electrode lead, so that the second electrode 1 is electrically connected to the second electrode lead . The thermoacoustic device 10 is electrically connected to an external circuit through the first electrode lead and the second electrode lead. The thermoacoustic element 1G2 comprises a stone (four) film which is a one-dimensional structure having an area of a film structure. The thickness of the graphite thin film is from 0.34 nm to 1 G nm. The graphite shaft includes at least one layer of graphite thin. When the graphite thin film comprises a plurality of layers of graphene, the multi-layered graphite is sprayed to form a graphene film to overlap each other to make the graphite thin film have a larger area; or the multi-layer graphite is sprayed to form a graphene film to form a thinner graphite The thickness of the film is increased. "Ground, the graphite thin film is - single layer graphite ^. The sarcophagus is a two-dimensional planar structure of an early layer formed by a plurality of carbon atoms through sp2 bond hybridization. The thickness of the graphite thin can be the thickness of a single layer of carbon atoms. Graphite _ has a high light transmittance, and the transmittance of a single layer of graphite can reach 97. The form number is deleted. & Using graphite as the medium. Page 6 of 58 10020: 201240484 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 2 x 10 3 joules per square centimeter Kelvin, and the heat capacity of the single layer graphene can be less than 5. 57 x 1 (T4 joule 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 stone is prepared by chemical vapor deposition. The graphene 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 higher than that of the thermo-acoustic element 102. The dielectric may include 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. Resistivity of the liquid medium More than 0.01 ohm·m, preferably, the liquid medium is pure water. The conductivity of the purified water can reach 1. 5 x lO7 ohm·m, and the heat capacity per unit area is also large, and the thermoacoustic element 102 can be conducted. The heat generated can thus be applied to the thermoacoustic component 102 100112573 Form No. A0101, page 7 / page 58 1002020942-0 201240484. In this embodiment, the medium is air. [0017] [0018] 0019] 100112573 ^ The thermo-acoustic device 1G of the embodiment can be electrically connected to the external P circuit through the first pole 10a and the second circuit, and thereby the external signal is sounded. By: the thermo-acoustic element 1 〇2 The graphite thin film has a relatively large heat flux per unit area and a large heat dissipating area. After the heating device 104: causes the acoustic element lQ2 to turn on the signal, the thermoacoustic element 102 can be quickly raised and lowered. The temperature 'generates a periodic temperature change and heats up with the surrounding medium to read 'heat the density of the surrounding medium periodically' to make a sound. In short, the thermoacoustic element 102 of the embodiment of the present invention. The sound is achieved by the conversion of electric__heat_sound. In addition, by using the high transmittance of the graphene film, the thermoacoustic I is set to a transparent heat-induced sounding device. The heat provided by this embodiment The sound pressure level of the sound generating device 10 is greater than 5 〇 decibels per watt sound pressure level, and the sounding frequency ranges from 丨Hz to 1 10,000 Hz (ie, ΙΗζ-lOO kHz). The thermoacoustic device may have a distortion of less than 3% in the frequency range of 500 Hz to 40,000 Hz. Referring to Figures 3 and 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. The surface of the substrate 2〇8 may be a flat surface or a curved surface. The material of the substrate 208 is not limited to being a hard material or a flexible material having a certain strength. Preferably, the material of Form No. 208 of the substrate 208 has a resistance greater than that of the thermoacoustic element 1 〇2 and has better thermal and thermal resistance, thereby preventing the Thermal sounding components! Excessive heat generated by 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 2〇8a. The depth of the aperture 208a 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 2〇8a is a blind hole. When the depth of the hole 208a 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 'polygon, an I-shape, or an irregular figure. When the substrate 208 includes a plurality of holes 208a, the plurality of holes 2〇8a may be uniformly distributed, distributed in a regular pattern, or randomly distributed to the substrate 2〇8. The spacing of each adjacent two holes 208a is not limited, and is preferably from 1 μm to 3 mm. In this embodiment, the substrate includes a plurality of holes 208a, which are through holes, and have a cylindrical shape in cross section, which is evenly 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 hole 208a on the substrate 208. In this embodiment, since the portion of the thermo-acoustic element 102 above the hole 208a is suspended, The thermally audible elements 102 of the portion are in contact with the surrounding medium on both sides, increasing the area of contact of the thermally audible element 102 with the surrounding gas or liquid medium, and since another portion of the thermally audible element 102 is directly opposite the surface of the substrate 208 Contacted and supported by the substrate 208, the thermally audible element 102 is less susceptible to damage. [0022] Referring to FIG. 5, a third embodiment of the present invention provides a thermo-acoustic sounding device 3〇 100112573 Form No. A0101 Page 9 of 58 1002020942-0 201240484. 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 can 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. 100112573 Form No. A0101 Page 10 of 58 1002020942-0 201240484 '. [0023] In the thermo-acoustic device 30 of the present embodiment, since the substrate includes at least one groove 308a, the groove 308a can reflect the heat The sound waves emitted by the acoustic element 1〇2 are caused to enhance the vocal intensity of the thermoacoustic device 3 on the side of the thermoacoustic element 102. When the distance between the adjacent grooves 3〇8& is close to 0, the substrate 308 can support the thermoacoustic element 1〇2, and the thermo-acoustic element 102 can have the largest contact with the surrounding medium. Surface area. [0024] It can be understood that when the depth of the groove 308a reaches a certain value, the sound wave reflected by the groove 308a is superimposed with the original sound wave, thereby causing destructive interference 'jing> sounding of the heat-producing element 102. effect. To avoid this phenomenon, 'preferably' the depth of the groove 308a is less than or equal to the minimum. 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, it is preferable that the depth of the groove 3〇8& is greater than or equal to 10 μm. ❹ Referring to FIG. 8 and FIG. 9, a fourth embodiment of the present invention provides a thermo-acoustic device 40. The thermo-acoustic device 40 of the present embodiment is different from the thermo-acoustic device 20 of the second embodiment in that, in the embodiment, the substrate 408 of the thermo-acoustic device 40 is a mesh structure. The substrate 4〇8 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 408b are interdigitated to form a substrate 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 '100112573 Form No. A0101 Page 11 / Total 58 Pages 1002020942- 0 201240484 are not parallel to each other, when the plurality of first linear structures 408a are parallel to each other, and the plurality of second linear structures 408b are parallel to each other, specifically, the axial direction of the plurality of first linear structures 408a One direction L1 extends, and the distance between 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 408b 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 fixed by a bonding agent or may be fixed 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 be fixedly disposed by heat pressing. The substrate 408 has a plurality of meshes 408c. The plurality of cells 408c 100112573 Form No. A0101 Page 12 of 58 1002020942-0 201240484 ‘. The plurality of first linear structures 408a and the plurality of second linear structures 408b are disposed by crossing each other. The mesh 4〇8c 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 4〇8a and the plurality of second lines are The braided structures 408b are perpendicular to each other, so the mesh 408c is square and has a side length of 2 cm. [0027] The diameter of the first linear structure 4〇8a is not limited, and is preferably 10 micrometers to 5 millimeters. 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 4〇88 may include one or more of plant fibers, animal fibers, wood fibers, and mineral fibers, such as cotton and linen. Line, wool, silk thread, nylon thread or spandex. Preferably, the insulating material should have a certain heat resistance and flexibility such as nylon or polyester. Further, the first linear structure 4?ga 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. The elemental metal may be aluminum, copper, tungsten 'molybdenum, gold, titanium, rhodium, palladium or iridium. 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 ceria or a metal oxide. In this embodiment, the first linear structure 4〇8a is a surface 100112573 Form No. A0101 Page 13/58 page 1002020942-0 201240484 A carbon nanotube-like structure coated with cerium oxide, composed of cerium oxide The insulating layer encapsulates the nanocarbon line-like structure to constitute the first linear structure 408a. [0030] [0030] The structure and material of the second linear structure 408b are the same as the structure and material of the first linear structure 4 0 8 a. 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. 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, and a multi-walled carbon nanotube t. 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. The nanocarbon line may be a non-twisted nanocarbon line or a twisted 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 Through the carbon nanotubes that are tightly combined with 100,112,573 watts. That is, the non-twisted nanocarbon line includes a plurality of carbon nanotubes extending in the same direction. Form No. A0101 in the direction of extension No. 4 page / Total 58 pages 1002020942-0 201240484 The carbon nanotubes are connected to each other by van der Waals force. The nano carbon capture segment has a desired length, thickness, uniformity and shape. The length of the #twisted nano carbon pipeline is not limited, and the diameter is from 0.5 nm to 100 μ. [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 11, the twisted nanocarbon line includes a plurality of carbon nanotubes arranged axially helically around the carbon nanotube line. Preferably, the twisted nanocarbon pipeline comprises a plurality of carbon nanotube segments, the plurality of carbon nanotube segments being connected end to end by a van der Waals force, and each of the carbon nanotube segments comprises a plurality of mutually parallel And through the close combination of the van der Waals carbon nanotubes. The carbon nanotube segments have any length, thickness, uniformity, and shape. The twisted carbon nanotube wire has an unlimited length and has a diameter of from 0.5 nm to 1 μm. The nano carbon pipeline and its preparation method can be found in Fan Shoushan et al., which was filed in the Republic of China in the first year of the Republic of China, and was published in the Republic of China on November 21, 1997. No. 1303239 Taiwan announced the patent 'a kind of carbon nanotube Rope and its manufacturing method", the patentee: Hon Hai Precision Industry Co., Ltd., and the 1312337 Taiwan Public Notice on July 21, 1998, Taiwan Announced Person: Hon Hai Precision Industry Co., Ltd. In order to save space 'only here', all the technical disclosures mentioned above should also be regarded as part of the disclosure of the present application. [0032] The heat-induced sound provided by this embodiment The base 408 of the device adopting the mesh structure has the following advantages. First, the mesh structure includes a plurality of mesh holes, and the heat-producing sound element 7 () 2 is provided at the same time, and the heat-generating sound-emitting element 1 〇 2 It has a large contact area with the surrounding medium. It: the base 408 of the mesh structure can have a softer feelability. Therefore, the 'thermo-acoustic device 100112573 form number A0101 page 15/58 page 1002020942-0 201240484 40 has Good Flexibility. Third, when the first linear structure 4〇83 or/spear second linear structure 408b includes a nanocarbon line-like structure coated with an insulating layer, the nanocarbon line-like structure may have a smaller The diameter further increases the contact area of the thermo-acoustic element 1〇2 with the surrounding medium; the nano-sinus linear structure has a small density, and therefore, the mass of the thermo-acoustic device 4〇 can be small; the nanocarbon The pipeline-like structure has better flexibility 'can be bent multiple times without being damaged, and therefore, the thermo-acoustic device 40 can have a longer service life. [0035] [0035] 100112573 understandable The mesh structure of the substrate 408 in this embodiment may also be woven from at least one of the above various linear structures. When the substrate 408 includes a linear structure, the one linear structure may be bent and folded multiple times. After forming a mesh structure, please refer 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 In this implementation The base 508 of the thermo-acoustic device 50 is a carbon nanotube composite structure. The carbon nanotube composite structure includes a carbon nanotube layer and an insulating material layer coated on the surface of the carbon nanotube layer. The carbon nanotube layer comprises a plurality of uniformly distributed carbon nanotubes, and the carbon nanotubes may be one or a few of single-walled carbon nanotubes, double-walled carbon nanotubes, and multi-walled carbon nanotubes. 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 arrangement means that the arrangement direction of the carbon nanotubes is irregular, and the ordered 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, the form number A0101 is 16 pages/58 pages 201240484 ❹ [0036] ❹ carbon nanotubes may be intertwined or isotropically arranged; When the carbon nanotube layer comprises an ordered arrangement of carbon nanotubes, the carbon nanotubes are arranged in a preferred orientation in one direction or in a plurality of directions. The thickness of the carbon nanotube layer is not limited and may be 0.5 nm to 1 cm. Preferably, the carbon nanotube layer may have a thickness of 100 μm to 1 mm. The carbon nanotube layer further includes a plurality of micropores formed by a gap between the carbon nanotubes. The pores in the carbon nanotube layer may have a pore diameter of 50 μm or less. The carbon nanotube layer may comprise at least one layer of carbon nanotube film, a carbon nanotube film or a carbon nanotube film. 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 substantially the same direction. The preferred orientation means that the majority of the carbon nanotubes in the carbon nanotube film are oriented in substantially 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. Further, most of the carbon nanotubes in the carbon nanotube film are connected end to end by van der Waals force. Specifically, each of the carbon nanotubes of the majority of the carbon nanotubes extending in the same direction in the carbon nanotube film is connected end to end with the carbon nanotubes adjacent in the extending direction by van der Waals force . Of course, there are a small number of randomly arranged carbon nanotubes in the carbon nanotube film, and these carbon nanotubes do not significantly affect the overall orientation of most of the carbon nanotubes in the carbon nanotube film. The carbon nanotube film is a self-supporting film. The self-supporting carbon nanotube film does not require a large-area carrier support, and as long as the support force is provided on both sides, it can be suspended in the whole to maintain its own film state, that is, the carbon nanotube film is placed (or Fixed at a fixed distance setting of two 100112573 Form No. A0101 Page 17 / 58 pages 1002020942-0 201240484 On the support, the carbon nanotube film between the two supports can be suspended to maintain its own film 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 nanotubes. [0039] The carbon nanotube film may have a thickness of 〇5 nm to 1 μm, and the width and length are not limited, and are set according to the size of the second substrate 1〇8. For the specific structure of the nano carbon official film and its preparation method, please refer to Fan Shoushan et al. on February 12, 1996, the application of the Republic of China, No. 1327177 announced in the Republic of China. To save space, reference is made only to this, but all technical disclosures of the application are also considered to be part of the technical disclosure of the present application. When the carbon nanotube layer comprises a multi-layered carbon nanotube film, the angle of intersection formed between the extending directions of the carbon nanotubes in the adjacent two layers of the carbon carbon film is not limited. Referring to Fig. 14, the carbon nanotube flocculation membrane is a carbon nanotube membrane formed by a flocculation method. The carbon nanotube flocculation membrane comprises carbon nanotubes which are intertwined and uniformly distributed. The carbon nanotubes are attracted and entangled by van der Waals forces to form a network structure. The carbon nanotube flocculation membrane is isotropic. The length and width of the carbon nanotube film are not limited. Since 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 breaking. . The area and thickness of the carbon nanotube film are not limited, and the thickness is from 丨 micrometer to 丨 millimeter. The nano carbon official flocculation crucible and the preparation method thereof can be found in Fan Shoushan et al., which was filed on May 11, 1996, in the Republic of China, on the 16th of the year, on the 16th of the year, the form number A0101, page 18 of 58 Page 1002020942-0 201240484 [0040]

[00041] Taiwan Patent Publication No. 100112573, No. 200844041, "Preparation of Nano Carbon Films". 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. Referring to Fig. 15, the carbon nanotube rolled film comprises uniformly distributed nano-tubes, and the carbon nanotubes are arranged along the same direction in a preferred orientation. The carbon nanotubes can also be isotropic. The carbon nanotubes in the carbon nanotube rolled film partially overlap each other and are attracted to each other by the van der Waals force, and are tightly bonded. The carbon nanotubes in the carbon nanotube rolled film form an angle > 5 with the surface of the growth substrate forming the carbon nanotube array, wherein /5 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. Form No. A0101 Page 19 of 58 1002020942-0 201240484 Each of the carbon nanotubes in the layer of carbon nanotubes is wrapped. When the thickness of the insulating material layer is thin, the micropores in the carbon nanotube layer are not blocked, and therefore, the carbon nanotube composite structure includes a plurality of micropores. The thermally audible element 102 is at least partially suspended relative to the plurality of microwells. 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 carbon nanotube composite clock structure includes a carbon nanotube layer and The insulating material layer coated on 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 thermo-acoustic device 50 has a small mass and is convenient for application; secondly, the micropores in the carbon nanotube layer are composed of gaps between the carbon nanotubes and are evenly distributed, 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 1〇2 can be more uniformly contacted with the outside air through the substrate 508; third, the carbon nanotube layer has good The flexibility can be bent multiple times without being destroyed. Therefore, the carbon nanotube composite structure has good flexibility, and the thermo-acoustic device using the carbon nanotube composite structure as the substrate 508 is flexible. Sound device, can be set Any shape is not limited. Referring to Figures 16 and 17, a sixth embodiment of the present invention provides a thermally-induced sounding device 60 that includes a substrate 6〇8, a uniform thermal device 104, and a thermo-acoustic component 102. The heating device 1〇4 includes a plurality of first electrodes 104a and a plurality of second electrodes i〇4b, and the plurality of first electrodes 104a and the plurality of second electrodes 104b are electrically connected to the thermo-acoustic elements 102, respectively. . 100112573 Form No. A0101 Page 20 of 58 1002020942-0 201240484 • [0044] 复 The plurality of first electrodes 1〇4a and the plurality of second electrodes 1〇 are alternately disposed on the substrate 608. The thermoacoustic element 1〇2 is disposed on the plurality of first electrodes 104a and the plurality of second electrodes 1 such that the plurality of first electrodes 104a and the plurality of second electrodes 1〇41) are located Between the substrate 6〇8 and the thermoacoustic element 1〇2, the thermoacoustic element 1〇2 is partially suspended relative to the substrate 608. That is, the plurality of first electrodes 1 〇铛, the plurality of second electrodes 104b, the thermo-acoustic element 1 〇 2, and the substrate 6 〇 8 are collectively formed with a plurality of gaps 601 such that the thermo-acoustic elements 1 〇 2 and the surroundings The air creates a large contact area. The distance between each of the adjacent first electrodes 1〇4& and the second electrode 104b may or may not be equal. Preferably, the distance between each of the adjacent first electrodes 1 〇 4a and the second electrode 丨 04b is equal. The distance between the adjacent first electrode 104a and the second electrode 4b is not limited, and is preferably 10 micrometers to 1 centimeter. [0046] The substrate 608 mainly functions to carry the first electrode 104a and the second electrode 1 . The shape and size of the substrate 608 are not limited, and the material is an insulating material or a material having poor conductivity. In addition, the material of the substrate 608 should have good thermal insulation properties, so that the heat generated by the thermo-acoustic element 1 〇 2 is prevented from being absorbed by the substrate 608, and the purpose of heating the surrounding medium and sounding is not achieved. In this embodiment, the material of the substrate 6 8 may be glass, resin or ceramic or the like. 5厘米的厚度为1毫米。 In this embodiment, the substrate 6〇8 is a square glass plate having a side length of 4.5 cm, a thickness of 1 mm. The gap 601 is defined by a first electrode i〇4a, a second electrode i〇4b, and a substrate 608 whose height depends on the height of the first electrode 1〇4& and the second electrode 104b. In the present embodiment, the heights of the first electrodes 1〇4& and the second electrode 104b are in the range of i micrometers to 1 centimeter. Preferably, the number of the electrodes 104a and the second electrode 104b is 15 micrometers. [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 100112573 form number A0101 page 22 / 58 page 1002020942-0 201240484, the thermal resistance of the 帛 electrode lead 610 and the second electrode lead 612 between the pieces 1{) 2 square resistance is greatly reduced, can Improve the sounding efficiency of the thermo-acoustic tl piece 102. [0049] In the first embodiment, the plurality of first electrodes 1〇4a and the plurality of second electrodes 1 can function as the domain thermo-acoustic element 1G2, and therefore, the substrate 8 is not necessarily matched. When the thermal sound generating device (10) of the present embodiment does not include the substrate 6084' the first electrode (4) and the second electrode 1 (4), it can also protect the heat generating device 102 from being electrically connected to the external circuit. And supporting the thermoacoustic element 1 〇2. In the present example, the first electrode 104a and the second electrode 1〇4b 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 on the substrate 608. Each of the first electrode 104a and the second electrode 104b has a length of 3 cm and a height of 15 μm, and a distance between the adjacent first electrode 104a and the second electrode 104b is 5 mm. [0051] In the thermo-acoustic device 60 provided by the embodiment, the thermo-acoustic element 102 is suspended by the plurality of first electrodes 104a and the plurality of second electrodes 104b, thereby increasing the contact of the thermo-acoustic element 102 with the surrounding air. The area is advantageous for heat exchange between the heat-induced sounding element 102 and the surrounding air, and the sound generation efficiency is improved. Referring to FIG. 18 and FIG. 19, a seventh embodiment of the present invention provides a thermo-acoustic sounding device 70. The thermoacoustic device 70 includes a substrate 608, a uniform thermal device 104, and a pyrogenic component 102. The heating device 104 includes a plurality of 100112573, a form number A0101, a page 23, a total of 58 pages, 1002020942-0 [0052] 201240484 first-electrode〗 04a and a plurality of second electrodes, the plurality of first-electrode 4a and a plurality of second electrodes 1 are electrically connected to the thermo-acoustic elements, respectively. The thermoacoustic element 1〇2 includes a graphene film. The structure of the thermo-acoustic device 7A provided in this embodiment is substantially the same as that of the thermo-acoustic device 6G provided in the sixth embodiment, and the difference is that the two adjacent first electrodes 104a and At least one spacer element 714 is further included between the two electrodes i〇4b. [0054] The spacer element 714 and the substrate 608 may be separate components that are secured to the substrate 608 by, for example, bolting or adhesive bonding. Alternatively, the spacer element 714 may be integral with the substrate 6A, i.e., the spacer element 714 may be of the same material as the substrate 6A8. 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 sound-emitting element 102 with good sounding effect, the spacer element Ή4 should have a small contact area with the thermally-induced sound-emitting element 102 while supporting the thermally-induced sound-emitting element 102, preferably the spacer element 714 and the heat-producing sound The elements 102 are in point or line contact. In the present embodiment, the material of the spacer member 714 is not limited to an insulating material such as glass, ceramic or resin, and may be a conductive material such as a metal, an alloy or an indium tin oxide. When the spacer member 714 is a conductive material, it is electrically insulated from the first electrode 104a and the second electrode 104b, and, preferably, the spacer member 714 is parallel to the first electrode 104a and the second electrode i4b. The height of the spacer element 714 is not limited, and is preferably 丨〇 micrometers to 丨 cm. In this embodiment, the spacer element 714 is a filament-like silver formed by a screen printing method, and the height of the spacer element 714 is the same as the height of the first electrodes 1〇4& and the second electrode 104b, and is 20 μm. The spacer element 714 is disposed in parallel with the first electrode 100112573 form number_eight0101 page 24/58 page 1002020942-0 201240484 104a and the second electrode 104b. Since the height of the spacer member 714 is the same as the height of the first electrode 104a and the second electrode 104b, the thermo-acoustic elements 102 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 thermo-acoustic element 1 2 is spaced apart from the substrate 608 by the spacer element 714 and forms a space 701 with the substrate 608. The space 701 is defined by the first electrode 104a or the second electrode 104b. The spacer element 714, the substrate 608, and the thermally audible element 102 are collectively formed. Further, in order to prevent the thermo-acoustic element 1 〇 2 from generating a standing wave, maintaining the good sound-generating effect of the thermo-acoustic element 102, the distance between the thermo-acoustic element 102 and the substrate 608 is preferably 1 μm to 1 cm. In this embodiment, since the heights of the first electrode 104a, the second electrode 104b, and the spacer 714 are 2 〇 micrometers, the thermoacoustic element 102 is disposed on the first electrode 104a, the second electrode 104b, and the spacer. Element 714, therefore, 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 10a and the second electrode 10b have a certain supporting effect on the thermo-acoustic element 102, but when the distance between the first electrode i〇4a and the second electrode 104b is greater than When the time is large, the supporting effect on the thermoacoustic element 102 is not good, and the spacer element 714' is disposed between the first electrode 104a and the second electrode 104b to better support the function of the thermoacoustic element 102. The thermo-acoustic element 1〇2 is spaced from the substrate 608 and forms a space 701 with the substrate 608, thereby ensuring that the thermo-acoustic element 1〇2 has a good vocalization effect. Referring to Figure 20, an eighth embodiment of the present invention provides a thermo-acoustic device. The thermoacoustic device 80 includes at least one heating device and a plurality of 100112573 Form No. A0101 Page 25 of 58 1002020942-0 [0057] 201240484 Thermoacoustic element. 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 a 'the thermoacoustic component is disposed on a substrate having a curved surface such that a plurality of normal directions are formed or the thermoacoustic 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 this embodiment, the thermo-acoustic device 80 includes a first heating device 8〇4, a second heating device 806, a substrate 208, a first thermo-acoustic component 8〇2a, and a second heat. The sounding element 802b is caused. [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 first surface may be two adjacent surfaces or two opposite surfaces. In this embodiment, the substrate 208 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' that pass through 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 element 8〇2a ax is placed 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 100112573 Form No. A0101 Page 26 of 58 page 1002020942-0 201240484. The first thermo-acoustic element 802a is a graphene film. The second thermoacoustic element 802b is a graphene film or a carbon nanotube layer. The structure of the carbon nanotube layer is the same as that of the carbon nanotube layer disclosed in the fifth embodiment. Since the carbon nanotube layer includes at least one layer of carbon nanotube film, the carbon nanotube layer has a small thickness and a small heat capacity per unit area, and therefore, the carbon nanotube layer can also function as a thermoacoustic element. [0060] The first 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 〇 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 802a and are flush with the opposite sides of the first thermo-acoustic element 8〇2a. The second heating device 806 includes a first electrode 104a and a second electrode 104b. The first electrode 104a and the second electrode 104b 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 second thermo-acoustic element 802b and opposite to the two sides of the first thermo-acoustic element 802a. [0061] This embodiment is The provided thermoacoustic device 80 is a double-sided sounding device, and by providing a thermo-acoustic component on two different surfaces, the range of sound emitted by the thermo-acoustic component can be made larger and clearer. It is possible to control the heating device to make any of the thermoacoustic elements emit sound, or to simultaneously emit sound, so that the use of the thermoacoustic device is wider. Further, when one of the thermo-acoustic elements fails, the other thermo-acoustic element can continue to work, improving the heat-induced sound. 100112573 Form No. A0101 Page 27 of 58 1002020942-0 201240484 The service life of the device. 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 this embodiment, the heating device 1 004 is a mine. A transmitter, 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. 100112573 Form No. A0101 Page 28 of 58 1002020942-0 201240484 • [0067] The heating device 1004 can be placed on the thermoacoustic element ΐ〇2. When the heating device 1004 is a laser, when the substrate 208 is a transparent substrate, the laser can be disposed corresponding to the surface of the substrate 208 away from the thermoacoustic element 102 so as to be emitted from the laser. Laser light is transmitted through the substrate 208 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 102 through the substrate 208. At this time, the heating device 1 〇〇 4 can also correspond to The substrate 208 is disposed away from the surface of the thermoacoustic element 1〇2. [0068] In the thermo-acoustic device 1 of the present embodiment, when the thermo-acoustic element 102 is irradiated with electromagnetic waves such as lasers, the thermo-acoustic element 1 〇 2 is excited by absorbing energy of electromagnetic waves. And through non-Korean radiation, the absorbed light energy is converted into heat in whole or in part. The temperature of the thermoacoustic element 102 varies according to the frequency and intensity of the electromagnetic wave L1020, and is rapidly exchanged with the surrounding air or other gas or liquid medium, so that the temperature of the surrounding chamber also generates the same frequency. The change causes the surrounding medium to expand and contract rapidly, thereby making a sound. Q [0069] Since the thermal sound generating device works by converting the energy of the predetermined form into heat at a very fast speed and performing heat exchange with the surrounding gas or liquid medium, the medium expands and contracts. , thus making a hoar. It can be understood that the energy form is not limited to electric energy or light energy, and the device, the device is not limited to the electrode or the electromagnetic wave signal generator in the above embodiment, and any heat generating acoustic element can be heated and according to the audio. A device that varies the heating of the surrounding medium can be considered a consistent thermal device, and is within the scope of the present invention. 100112573 The graphene film of the present invention has good toughness and mechanical strength, so Form No. A0101 Page 29 of 58 1002020942-0 [0070] 201240484 Graphene film can be conveniently fabricated into various shapes and sizes of heat Sounds installed i. The thermoacoustic I arrangement of the present invention can be used not only as a speaker alone, but also conveniently in various electronic devices requiring sound generating devices. The thermo-acoustic 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 conventional sounding unit of the electronic device or can be used in combination with a conventional sounding unit. The thermo-acoustic 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. The wired method is combined with the USB interface of the electronic device, for example, through a signal transmission line, and the wireless method is connected to the electronic device, for example, by blue f, tooth mode. 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 '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 an 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 a sound. [0071] In summary, the present invention 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 it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by those skilled in the art to the spirit of the invention are intended to be included within the scope of the following claims. 100112573 Form No. A0101 Page 30 of 58 1002020942-0 201240484 [Simplified Schematic] 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 I I - 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. 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. 13 is a scanning electron micrograph of a carbon nanotube film taken by the carbon nanotube layer of FIG. Figure 14 is a scanning electron micrograph of a carbon nanotube flocculation film used in the carbon nanotube layer of Figure 12. 100112573 Form No. A0101 Page 31 of 58 1002020942-0 [0085] FIG. 15 is a scanning electron micrograph of a carbon nanotube rolled film used in the carbon nanotube layer of FIG. 16 is a plan view of a thermo-acoustic device according to a sixth embodiment of the present invention. [0088] FIG. 17 is a cross-sectional view taken along line XVI-XVII of FIG. 16. Figure 18 is a plan view of a thermoacoustic device according to a seventh embodiment of the present invention. [0090] Figure 19 is a cross-sectional view taken along line XIX-XIX of Figure 18. 20 is a side cross-sectional view of 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. 22 is a side view of a thermoacoustic device according to a tenth embodiment of the present invention. [Main component symbol description] [0094] Thermoacoustic device: 10; 20; 30; 40; 50; 60; 80; 90; 100 [0095] Thermoacoustic element: 102 [0096] Heating device: 104; 1004 [0097] First electrode: 104a [0098] Second electrode: 104b [0099] Substrate: 208; 308; 408 ; 508 ; 608 ; 908 1002020942-0 100112573 Form number A0101 Page 32 / Total 58 pages 201240484

[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] ] Coherent thermal device: 804 [0113] Second heating device: 806 [0114] Electromagnetic wave signal: 1020 100112573 Form number A0101 Page 33 / Total 58 pages 1002020942-0

Claims (1)

201240484 VII. Patent application scope: 1. A thermo-acoustic device comprising: a substrate, the substrate is a mesh structure; a thermo-acoustic element disposed on a surface of the substrate; a heat-consisting device for the heat-induced The sounding element provides energy to cause the thermo-acoustic element to generate heat; the improvement is that the thermo-acoustic element comprises a graphene film, the substrate comprises at least one linear structure, and the at least one linear structure comprises a nano carbon line The thermo-acoustic device according to the first aspect of the invention, wherein the graphene film comprises a plurality of layers of graphene, the multi-layer graphene They are overlapped or superimposed on 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 substrate is a mesh structure bent from a nanocarbon line-like structure, and the surface of the nanocarbon line structure is provided Insulation. 6. The thermoacoustic device according to claim 1, wherein the substrate is a network structure composed of a plurality of nanocarbon line-like structures, and surfaces of the plurality of nanocarbon line structures are An insulating layer is provided. 7. The thermoacoustic device according to claim 1, wherein the substrate comprises a plurality of first linear structures and a plurality of second linear structures, the 100112573 form number A010I page 34 of 58 Page 1002020942-0 201240484 A plurality of first linear structures and the plurality of second linear structures are disposed to intersect with each other. The first linear structure includes the nanocarbon pipeline-like structure and is disposed in the nanometer-like pipeline An insulating layer on the surface of the structure, the second linear structure comprising a nanocarbon line-like structure and an insulating layer disposed on a surface of the nanocarbon line-like structure. 8. The thermoacoustic device according to any one of claims 5 to 7, wherein the nanocarbon line-like structure comprises at least one nanocarbon line. The nanocarbon line includes plural A carbon nanotube. 9. The thermoacoustic device according to claim 8, wherein the carbon nanotubes in the tantalum carbon pipeline extend in a direction parallel to the axial direction of the nanocarbon pipeline. The thermoacoustic device according to the item 9, wherein the carbon nanotubes adjacent to each other in the same extending direction of the nanocarbon line are connected end to end by a van der Waals force. 11. The thermoacoustic device according to claim 8, wherein the carbon nanotubes in the nanocarbon line are connected end to end and spirally wound. 12. The thermoacoustic device according to claim 8, wherein the nanocarbon line is a pure structure composed of the plurality of carbon nanotubes. 13. The thermoacoustic device according to claim 1, 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 The second linear structures are disposed to overlap each other, and the first linear structure comprises the nanocarbon pipeline-like structure and an insulating layer disposed on a surface of the nanocarbon pipeline-like structure, wherein the second linear structure is insulated The material or surface is coated with a conductive wire of an insulating layer. 14. The thermoacoustic device according to claim 1, wherein the substrate has a plurality of meshes, and the thermoacoustic element is in a state relative to the mesh 100112573 Form No. A0101 Page 35 of 58 Page 1002020942-0 201240484 Location dangling settings. The thermoacoustic device of claim 1, wherein the heating device comprises a first electrode and a second electrode electrically connected to the thermo-acoustic element, respectively. The thermo-acoustic device according to any one of claims 1, wherein the heating device is an electromagnetic wave signal generating device. 17. The thermoacoustic device of claim 16, wherein the heating device is a laser. An electronic device, wherein the electronic device comprises the thermoacoustic device according to any one of claims 1 to 17. The electronic device of claim 18, wherein the thermo-acoustic device is built in the electronic device or directly disposed on an outer casing of the electronic device. 20. The electronic device of claim 18, 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 18, 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. The electronic device of claim 18, wherein the electronic device further comprises a display screen, the thermal sound generating device being disposed on a surface of the display screen. 100112573 Form No. A0101 Page 36 of 58 1002020942-0