CN102026079B - Sound-producing device - Google Patents
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- CN102026079B CN102026079B CN200910170294.1A CN200910170294A CN102026079B CN 102026079 B CN102026079 B CN 102026079B CN 200910170294 A CN200910170294 A CN 200910170294A CN 102026079 B CN102026079 B CN 102026079B
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Abstract
The present invention relates to a kind of sound-producing device, comprising: a sounding module, this sounding module includes at least one first electrode, at least one second electrode and a hot sounding film, this first electrode and the second electrode electrically connect with this hot sounding film spaced reciprocally, wherein, described hot sounding film includes a carbon nano tube structure, described sound-producing device farther includes one first protection structure, one second protection structure and an infrared reflection film, described hot sounding film is arranged between this first protection structure and the second protection structure, described infrared reflection film is arranged on the first protection body structure surface.
Description
Technical field
The present invention relates to a kind of sound-producing device, particularly relate to a kind of sound-producing device based on thermo-acoustic principles.
Background technology
As far back as earlier 1900s, H.D.Arnold et al. proposes a kind of thermophone based on thermoacoustic effect, refer to document " Thethermophoneasaprecisionsourceofsound ", H.D.Arnold, I.B.Crandall, Phys.Rev.10,22-38 (1917) and " OnSomeThermalEffectsofElectricCurrents ", WilliamHenryPreece, ProceedingsoftheRoyalSocietyofLondon, Vol.30, pp408-411 (1879-1881). This thermophone realizes sounding by passing into alternating current in a conductor. This conductor must have less thermal capacitance, relatively thin thickness, and the heat produced inside it can be rapidly conducted to the feature of surrounding gas medium. When alternating current is by conductor, with the change of AC current intensity, conductor can heating and cooling rapidly, and there is rapidly heat exchange, surrounding gas medium molecular motion with surrounding gas medium, gas medium density also changes therewith, and then sends sound wave. In prior art, maximally effective conductor is metal.
H.D.Arnold and I.B.Crandall is at document " Thethermophoneasaprecisionsourceofsound ", Phys.Rev.10, pp22-38 (1917) describes a kind of simple thermophone, it adopts a platinized platinum to make sounding component, and the thickness of this platinized platinum is 0.7 micron. Referring to Fig. 1, this sounding component 102 is fixed by a fixture 104. Described sounding component 102 and fixture 104 are arranged on matrix 108 surface. One current feed 106 electrically connects with described sounding component 102, is used for described sounding component 102 input electrical signal. Owing to the audible frequency of sounding component 102 is closely related with its unit are thermal capacitance. Unit are thermal capacitance is big, then audible frequency narrow range, and intensity is low; Unit are thermal capacitance is little, then audible frequency wide ranges, and intensity is high. It is intended to obtain the sound wave with wider audible frequency scope and higher-strength, then requires that the unit are thermal capacitance of sounding component 102 is less better. And there is the metal platinized platinum of less thermal capacitance, by the restriction of material itself, its thickness is minimum can only reach 0.7 micron, and the unit are thermal capacitance of platinized platinum 0.7 micron thick is 2 × 10-4Joules per cm Kelvin. By the restriction that bill of materials plane accumulated heat is held, the audible frequency adopting the acoustical generator that this platinized platinum makes sounding component 102 is the highest only relatively low up to 4 KHz and intensity of phonation. Therefore, the above-mentioned thermophone utilizing thermoacoustic effect cannot meet daily use.
Summary of the invention
In view of this, a kind of sound-producing device of necessary offer, the frequency range of this sound-producing device is wider, and intensity of phonation is higher and sounding effect is better.
A kind of sound-producing device; comprising: a sounding module; this sounding module includes at least one first electrode; at least one second electrode and a hot sounding film; this first electrode and the second electrode electrically connect with this hot sounding film spaced reciprocally; wherein; described hot sounding film includes a carbon nano tube structure; described sound-producing device farther includes one first protection structure, one second protection structure and an infrared reflection film; described hot sounding film is arranged between this first protection structure and the second protection structure, and described infrared reflection film is arranged on the first protection body structure surface.
A kind of sound-producing device, comprising: at least one first electrode, at least one second electrode and a hot sounding film, this first electrode and the second electrode electrically connect with this hot sounding film spaced reciprocally, wherein, described hot sounding film includes a carbon nano tube structure, and described sound-producing device farther includes an infrared reflection film and an infrared transmission film, and described hot sounding film is arranged between this infrared reflection film and infrared transmission film.
Compared with prior art, sound-producing device provided by the invention adopts carbon nano tube structure to make hot sounding film, this carbon nano tube structure has less unit are thermal capacitance, and audible frequency wider range of described sound-producing device, intensity of phonation is higher and sounding effect is better.
Accompanying drawing explanation
Fig. 1 is the structural representation of the sound-producing device that employing carbon nano-tube film makes hot sounding film in prior art.
Fig. 2 is the stereo decomposing structural representation of the sound-producing device that first embodiment of the invention provides.
Fig. 3 is the stereoscan photograph that first embodiment of the invention is used as the CNT membrane of hot sounding film.
Fig. 4 is the structural representation that first embodiment of the invention adopts the sounding module of multiple electrodes.
Fig. 5 is the stereo decomposing structural representation of the sound-producing device that second embodiment of the invention provides.
Fig. 6 is the stereo decomposing structural representation of the sound-producing device that third embodiment of the invention provides.
Detailed description of the invention
The sound-producing device of the embodiment of the present invention is described in detail below with reference to accompanying drawing.
Referring to Fig. 2, first embodiment of the invention provides a kind of sound-producing device 10, and this sound-producing device 10 includes a sounding module 110, and one first protection structure 120,1 second protects structure 130 and an infrared reflection film 140. Described first protection structure 120 and the second protection structure 130 are separately positioned on the both sides of described sounding module 110. Described infrared reflection film 140 is arranged on described first protection structure 120 surface.
Described sounding module 110 includes a hot sounding film 112, at least one first electrode 114 and at least one second electrode 116. Described first electrode 114 and the second electrode 116 electrically connect with this hot sounding film 112 spaced reciprocally. Specifically, described first electrode 114 and the second electrode 116 interval are arranged, and described hot sounding film 112 may be provided between described first electrode 114 and the second electrode 116. Described hot sounding film 112 can accept the signal of described first electrode 114 and the input of the second electrode 116 and sends sound wave.
Described hot sounding film 112 is arranged between this first protection structure 120 and second protection structure 130. Described hot sounding film 112 can include a carbon nano tube structure. This carbon nano tube structure includes multiple CNT. Described carbon nano tube structure is a self supporting structure. Attracted each other by Van der Waals force between the multiple CNTs in so-called self supporting structure and carbon nano tube structure, so that carbon nano tube structure has specific shape, unsettled can arrange, still maintain its specific shape. In the present embodiment, described hot sounding film 112 is unsettled at least partly to be arranged between described first protection structure 120 and described second protection structure 130. Specifically, described hot sounding film 112 can be arranged between described first protection structure 120 and described second protection structure 130 by described first electrode 114 and the second electrode 116 part are unsettled. Described carbon nano tube structure is stratiform and has bigger specific surface area. The thickness of described carbon nano tube structure is 0.5 nanometer～1 millimeter. Preferably, the thickness of this carbon nano tube structure is 50 nanometers. The unit are thermal capacitance of described carbon nano tube structure is smaller than 2 × 10-4Joules per cm Kelvin. Preferably, the unit are thermal capacitance of described carbon nano tube structure can be more than or equal to 1.7 × 10-6Joules per cm Kelvin and less than or equal to 1.7 × 10-5Joules per cm Kelvin. In the present embodiment, the unit are thermal capacitance of described carbon nano tube structure is 1.7 × 10-6Joules per cm Kelvin. CNT in described carbon nano tube structure includes one or more in SWCN, double-walled carbon nano-tube and multi-walled carbon nano-tubes. The diameter of described SWCN is 0.5 nanometer～50 nanometers, and the diameter of described double-walled carbon nano-tube is 1.0 nanometers～50 nanometers, and the diameter of described multi-walled carbon nano-tubes is 1.5 nanometers～50 nanometers.
Described carbon nano tube structure can include at least one carbon nano-tube film. Specifically, described carbon nano tube structure can include multiple parallel and gapless and lays or/and the carbon nano-tube film laid of stacking. Described carbon nano-tube film includes multiple equally distributed CNT, is combined closely by Van der Waals force between CNT. CNT in this carbon nano-tube film can be ordered arrangement or lack of alignment. So-called ordered arrangement refers to that the orientation of CNT is regular. So-called lack of alignment refers to that the orientation of CNT is random. Specifically, when carbon nano tube structure includes the CNT of lack of alignment, CNT is wound around mutually or this carbon nano tube structure is isotropism; When carbon nano tube structure includes the CNT of ordered arrangement, CNT is arranged of preferred orient in one direction, or carbon nano tube structure includes multiple part, CNT is arranged of preferred orient in one direction in each part, and the CNT in adjacent two parts can arrange along different directions. Specifically, described carbon nano-tube film includes one or more in CNT membrane, CNT laminate, CNT waddingization film.
Described CNT membrane includes multiple CNT being substantially parallel to one another and being basically parallel to CNT membrane surface alignment. Specifically, described CNT membrane is included multiple CNT and is joined end to end by Van der Waals force and be substantially arranged of preferred orient in the same direction. Described CNT membrane can pass through directly to pull from carbon nano pipe array to obtain, and is a self supporting structure. The thickness of described CNT membrane can be 0.5 nanometer～100 microns, and width is relevant with the size of the carbon nano pipe array pulling this CNT membrane, and length is not limit. The stereoscan photograph of described CNT membrane refers to Fig. 3. Specifically, each CNT membrane includes CNT fragment that is multiple continuous and that align. The plurality of CNT fragment is joined end to end by Van der Waals force. Each CNT fragment includes multiple CNT being parallel to each other, and the plurality of CNT being parallel to each other is combined closely by Van der Waals force. It is appreciated that by parallel for multiple CNT membranes and gapless being laid or/and stacking is laid, it is possible to the carbon nano tube structure of preparation different area and thickness. When described carbon nano tube structure includes the CNT membrane that multiple stacking is arranged, the orientation of the adjacent CNT in CNT membrane forms an angle α, and α is be more than or equal to 0 degree and less than or equal to 90 degree (0 °≤α≤90 °). The CNT membrane of multilayer laminated setting, especially multilamellar CNT membrane arranged in a crossed manner has higher intensity relative to single-layer carbon nano-tube membrane, thus being conducive to improving the intensity of described hot sounding film 112. Structure of described CNT membrane and preparation method thereof refers to model and keeps and kind et al. apply on February 9th, 2007, in the disclosed in 13 days Augusts in 2008 No. 101239712A Chinese publication application.
Described CNT laminate includes equally distributed CNT. Described CNT laminate can be isotropism or include multiple part, and CNT is arranged of preferred orient in one direction in each part, and the CNT in adjacent two parts can arrange along different directions or arrange in same direction. CNT in described CNT laminate overlaps mutually. Described CNT laminate can be passed through to roll a carbon nano pipe array and obtain. This carbon nano pipe array is formed at a substrate surface, the surface of the prepared CNT in CNT laminate and the substrate of this carbon nano pipe array has angle β, wherein, β is be more than or equal to 0 degree and less than or equal to 15 degree (0≤β≤15 °). Described CNT laminate is the structure of a self-supporting, can without substrate support, and self-supporting exists. Described CNT laminate and preparation method thereof refers to model and keeps and kind et al. apply on June 1st, 2007, in the disclosed in 15 days October in 2008 No. 101284662 Chinese publication application. Described CNT waddingization film includes mutually being wound around and equally distributed CNT, and length of carbon nanotube can more than 10 centimetres. Attracted each other by Van der Waals force between described CNT, be wound around, form network-like structure. Described CNT waddingization film isotropism. CNT in described CNT waddingization film for being uniformly distributed, random arrangement, form substantial amounts of microcellular structure, micropore size is 1 nanometer～10 microns. Described CNT waddingization film and preparation method thereof refers to model and keeps and kind et al. apply on April 13rd, 2007, in No. 101314464 Chinese publication application disclosed in December in 2008 3 days.
Described first electrode 114 and the second electrode 116 are formed by conductive material, and its shape can be bar-shaped or strip. Specifically, the material of described first electrode 114 and the second electrode 116 may be selected to be metal, metallic carbon nanotubes etc. Wherein, described metal includes rustless steel, tungsten, copper, molybdenum or silver etc. In the embodiment of the present invention, described first electrode 114 and the second electrode 116 are ribbon metal electrode, and this ribbon metal electrode can have self supporting structure. Described first electrode 114 and the second electrode 116 can be used for supporting described hot sounding film 112 and inputting signal extremely described hot sounding film 112. The signal inputted includes ac signal or audio electrical signal etc. Owing to described first electrode 114 and the second electrode 116 interval are arranged, described hot sounding film 112 can access certain resistance when being applied to sound-producing device 10 and avoid short circuit phenomenon to produce.
It is appreciated that described sound-producing device 10 can farther include multiple first electrode 114 and multiple second electrode 116. Referring to Fig. 4, the plurality of first electrode 114 and multiple second electrode 116 alternate intervals are arranged, and have second electrode 116 between the first electrode 114 that namely any two is adjacent, and have first electrode 114 between adjacent the second electrode 116 of any two. Preferably, the distance between the plurality of first electrode 114 and multiple second electrode 116 is equal. Further, the plurality of first electrode 114 can electrically connect, and the plurality of second electrode 116 can electrically connect. Specifically, the plurality of first electrode 114 can be electrically connected by wire after as a signal input part, the plurality of second electrode 116 can be electrically connected by wire after as another signal input part. During use, above-mentioned two signal input part input electrical signal extremely described hot sounding film 112 can be passed through. Above-mentioned connected mode can realize the parallel connection of the hot sounding film 112 between adjacent electrode. The resistance of the hot sounding film 112 after parallel connection is the resistance of hot sounding film 112 less than before parallel connection, it is possible to decrease running voltage.
In the present embodiment, the described carbon nano tube structure as hot sounding film 112 includes one layer of CNT membrane. CNT is arranged of preferred orient in the same direction in this carbon nano tube structure. Described sound-producing device 10 includes one first electrode 114 and one second electrode 116. Described CNT is arranged of preferred orient along the direction of described first electrode 114 to the second electrode 116. The thickness of described carbon nano tube structure is 50 nanometers. Owing to CNT has great specific surface area, under the effect of Van der Waals force, adhering well to property of this carbon nano tube structure itself, therefore when adopting this carbon nano tube structure to make hot sounding film 112, can directly be adhered fixed between described first electrode 114 and the second electrode 116 and described hot sounding film 112, and form well electrical contact.
Described first protection structure 120 and the second protection structure 130 can be used for protecting described sounding module 110. Described first protection structure 120 and the second protection structure 130 can be stratiform or tabular. Being respectively arranged at the both sides of described sounding module 110, wherein, described first protection structure 120 is arranged on described sound-producing device 10 in the face of the side of user. The material of described first protection structure 120 and the second protection structure 130 is not limit, and only need to meet it has good heat resistance. Preferably, described first protection structure 120 and the second protection structure 130 have higher sound transmitance. The shape of described first protection structure 120 and the second protection structure 130 is not limit, and can be that a plane is alternatively a curved surface. The material of described first protection structure 120 and the second protection structure 130 may be selected to be conductive material, such as metal, it is possible to for insulant, such as plastic cement, plastics etc. Described metal includes one or more in rustless steel, carbon steel, copper, nickel, titanium, zinc and aluminum etc. Described first protection structure 120 and the second protection structure 130 can be a loose structure, such as aperture plate, it is possible to be a non-porous structure, such as glass plate, quartz plate etc. When this glass plate or quartz plate are used as the second protection structure 130, this glass plate or quartz plate should have good infrared transmission performance. In addition; when this glass plate or quartz plate are used as the second protection structure 130; described first electrode 114 and the second electrode 116 can be formed directly in described second protection structure 130 surface, and now, described hot sounding film 112 can unsettled be arranged between described first electrode 114 and the second electrode 116.
In the embodiment of the present invention, described first protection structure 120 and the second protection structure 130 are a loose structure. Specifically, described first protection structure 120 and the second protection structure 130 are a plastic cement aperture plate, and described plastic cement aperture plate has multiple through hole. The percentage ratio of the area that the through hole gross area of described first protection structure 120 and the second protection structure 130 accounts for this first protection structure 120 and the second protection structure 130 respectively can more than 0% less than 100%; preferably, the percentage ratio of described first protection structure 120 and the second area protecting the gross area of the through hole in structure 130 to account for this described first protection structure 120 and the second protection structure 130 respectively is between 20% to 99%. Distribution and the shape of the plurality of through hole are not limit.
Described infrared reflection film 140 and described hot sounding film 112 interval are arranged. Described infrared reflection film 140 may be provided at outer surface or the inner surface of described first protection structure 120. Described infrared reflection film 140 has good infrared reflection performance, can change the ultrared direction of propagation given off from hot sounding film 112. The infrared ray that described infrared reflection film 140 can be used for hot sounding film 112 being radiated to user side reflexes to (including near infrared ray and far infrared) opposite side (namely deviating from the side of user) of hot sounding film 140. Preferably, described infrared reflection film 140 also has good effect of heat insulation. The material of described infrared reflection film 140 is not limit, and only need to meet it has higher infrared reflection rate. The infrared reflection rate of described infrared reflection film 140 can be more than or equal to 20% and less than or equal to 100%. Preferably, the infrared reflection rate of described infrared reflection film 140 is be more than or equal to 70% and less than or equal to 99%. In the present embodiment, the infrared reflection rate of described infrared reflection film 140 is 95%. Described infrared reflection film 140 can include a matrix and be arranged on a reflectance coating of this matrix surface. This reflectance coating is metallic reflective coating. This metal includes gold, silver or copper etc. and has the material of better properties of infrared reflection. Described matrix includes polymer or fabric. Described polymer includes polyester film etc. Described metallic reflective coating can by preparing at one layer of metal material with high infrared ray reflectance of matrix surface sputter. Additionally, the surface away from matrix of described metallic reflective coating can arrange at least one dielectric film further, the material of this dielectric film can include silicon oxide, Afluon (Asta), silicon dioxide or aluminium sesquioxide etc. This dielectric film can be used for protecting described metallic reflective coating. Described infrared reflection film 140 can be made up of transparent material, or is made up of opaque material. Preferably, described infrared reflection film 140 is made up of transparent material. In the present embodiment, described infrared reflection film 140 is transparent polyester film surface configuration one silverskin, and this infrared reflection film 140 is arranged on the outer surface of described first protection structure 120. When described first protection structure 120 is a non-porous structure, described infrared reflection film 140 can only include a metallic reflective coating, and described metallic reflective coating also can be formed directly in described first protection structure 120 surface.
The distance of described infrared reflection film 140 and hot sounding film 112 is not limit. Preferably, described infrared reflection film 140 is not to affect the heat exchange between described hot sounding film 112 and surrounding medium, and can be effectively advisable on rear side of sound-producing device 10 by infrared reflection. In the present embodiment, the distance of described infrared reflection film 140 and hot sounding film 112 is about 10 millimeters.
Above-mentioned sound-producing device 10 is in use, owing to carbon nano tube structure is made up of equally distributed CNT, and this carbon nano tube structure is stratiform, has bigger specific surface area, therefore this carbon nano tube structure has less unit are thermal capacitance and bigger heat-delivery surface, after input signal, carbon nano tube structure can heating and cooling rapidly, produce periodic variations in temperature, and and surrounding medium quickly carry out heat exchange, make surrounding medium density cycling change, and then send sound. The principle of sound of described hot sounding film 112 is the conversion of " electric-thermal-sound ". In use, hot sounding film 112 carries out heat radiation towards periphery and quickly carries out heat exchange with surrounding medium described sound-producing device 10 in electromagnetic mode. The present invention is by protecting structure 120 surface configuration one infrared reflection film 140 to control the ultrared direction of propagation given off from hot sounding film 112 at described sound-producing device 10 towards the first of user side; the infrared reflection described hot sounding film 112 radiated to user side is to the opposite side of hot sounding film 112, and then makes the user being positioned at infrared reflection film 140 side not feel as heat.
The sound pressure level of the sound-producing device 10 that the embodiment of the present invention provides is more than 50 decibels of every watt of sound pressure levels, and audible frequency ranges for 1 hertz to 100,000 hertz (i.e. 1Hz-100kHz). The described sound-producing device distortion factor in 500 hertz of-4 ten thousand frequency range is smaller than 3%. When the single-layered carbon nanotube film adopting A4 paper size is used as described hot sounding film 112, one mike is arranged on the position apart from hot sounding film 5 centimetres, when input voltage is 50 volts, the audible frequency of measured sound-producing device 10 is be more than or equal to 100 hertz and less than or equal to 100,000 hertz, and intensity of phonation is more than 50 decibels of every watt of sound pressure levels. Audible frequency wider range of described sound-producing device 10, intensity is relatively big, and sounding effect is better.
Referring to Fig. 5, second embodiment of the invention provides a kind of sound-producing device 20, and this sound-producing device 20 includes a sounding module 210, and one first protection structure 220,1 second protects structure 230, infrared reflection film 240 and an infrared transmission film 250. Described sounding module 210 includes a hot sounding film 212, at least one first electrode 214 and at least one second electrode 216. Described first protection structure 220 and the second protection structure 230 are separately positioned on the both sides of described sounding module 210. Described infrared reflection film 240 is arranged on the first protection structure 220 surface. Described infrared transmission film 250 is arranged on the second protection structure 230 surface.
The sound-producing device 20 that second embodiment of the invention provides is essentially identical with the structure of the sound-producing device 10 of first embodiment. Being distinctive in that, the sound-producing device 20 that second embodiment of the invention provides farther includes an infrared transmission film 250, and this infrared transmission film 250 is arranged on the surface of described second protection structure 230. This infrared transmission film 250 is conducive to improving described sound-producing device 20 at the second infrared light transmission protecting structure 230 side. It addition, when described second protection structure 230 adopts a loose structure, during such as aperture plate, described infrared transmission film 250 can further function as the effect protecting described hot sounding film 212. The material of described infrared transmission film 250 can be the existing material with higher infrared light transmission. The infrared light transmission of described infrared transmission film 250 can be more than or equal to 10% and less than or equal to 99%. Preferably, the infrared light transmission of described infrared transmission film 250 can be more than or equal to 60% and less than or equal to 99%. In the present embodiment, the infrared light transmission of described infrared transmission film 250 is 90%. The material of described infrared transmission film 250 includes zinc sulfide, zinc selenide, diamond, diamond-like-carbon etc. and has the material of relatively high IR transmitance at infrared ray wave band.
Referring to Fig. 6, third embodiment of the invention provides a kind of sound-producing device 30, and this sound-producing device 30 includes a sounding module 310, infrared reflection film 340 and an infrared transmission film 350. Described infrared reflection film 340 and infrared transmission film 350 are separately positioned on the both sides of described sounding module 210, and are fixed on described sounding module 310. Described sounding module 310 includes hot sounding film 312,1 first electrode 314,1 second electrode 316 and a supporting construction 318. This hot sounding film 312 is arranged between described infrared reflection film 340 and infrared transmission film 350.
The sound-producing device 30 that 3rd embodiment provides is essentially identical with the structure of the sound-producing device 10 of first embodiment. Being distinctive in that, the sound-producing device 30 that third embodiment of the invention provides only includes a sounding module 310, infrared reflection film 340 and an infrared transmission film 350, and described sounding module 310 farther includes a supporting construction 318. Described sound-producing device 30 does not include described first protection structure and the second protection structure. Described infrared reflection film 340 and infrared transmission film 350 can further function as the effect protecting described hot sounding film 312. This supporting construction 318 is made by insulant, and this insulant can be glass, pottery, resin, wood materials, quartz or plastics etc. This supporting construction 318 can include end to end four side plates (figure does not mark), i.e. the first side plate, the second side plate, the 3rd side plate and the 4th side plate. Described first side plate, the second side plate, the 3rd side plate and the 4th side plate can be one-body molded. First side plate and the 3rd side plate relatively and parallel interval arrange, and the second side plate and the 4th side plate are relatively and parallel interval setting. Described first side plate, the second side plate, the 3rd side plate and the 4th side plate are collectively forming a space, and described hot sounding film 312 is arranged in this space by described first electrode 314 and the second electrode 316. The two ends of described first electrode 314 and the second electrode 316 are by the two of described supporting construction 318 side plate supports arranged in parallel. Described infrared reflection film 340 and infrared transmission film 350 preferably have self supporting structure. The size of described infrared reflection film 340 and infrared transmission film 350 can with the consistent size of described supporting construction 318. Described infrared reflection film 340 and infrared transmission film 350 can be fixedly installed on the side plate of described supporting construction 318 respectively through modes such as binding agents. In the present embodiment, described infrared reflection film 340 and infrared transmission film 350 are fixedly installed on four side plates of described supporting construction 318 respectively through binding agent. The infrared transmission film 350 being appreciated that in the present embodiment is selectable structure.
Sound-producing device provided by the invention has the advantage that one, carbon nano tube structure is adopted to make hot sounding film, this carbon nano tube structure has less unit are thermal capacitance, and audible frequency wider range of described sound-producing device, intensity of phonation is higher and sounding effect is better. They are two years old, sound-producing device provided by the invention further by arranging the opposite side of the infrared reflection extremely hot sounding film that described hot sounding film is sent by an infrared reflection film to infrared reflection film side in sounding module side, and then makes the user being positioned at infrared reflection film side not feel as heat. Its two, described sound-producing device can be protected structure and hot sounding film to form by stratiform, hot sounding film be arranged on said two stratiform protection structure between, stratiform protection structure hot sounding film can be shielded, make hot sounding film do not subject to external force destroy. Its three, described sound-producing device can only include sounding module, infrared reflection film and infrared transmission film, and now described infrared reflection film and infrared transmission film can further function as the effect protecting described hot sounding film, so that the structure of described sound-producing device is relatively simple.
It addition, those skilled in the art also can do other change in spirit of the present invention, certainly, these changes done according to present invention spirit, all should be included within present invention scope required for protection.
Claims (20)
1. a sound-producing device, comprising: a sounding module, this sounding module includes multiple being connected with each other the first electrode, multiple it is connected with each other the second electrode and a hot sounding film, the plurality of first electrode and multiple second electrode alternate intervals arrange and electrically connect with this hot sounding film, it is characterized in that, described hot sounding film includes a carbon nano tube structure, described sound-producing device farther includes one first protection structure, one second protection structure, one infrared reflection film and an infrared transmission film, described hot sounding film is arranged between this first protection structure and the second protection structure, described infrared reflection film is arranged on the first protection body structure surface, described infrared transmission film is arranged on the surface of described second protection structure.
2. sound-producing device as claimed in claim 1, it is characterised in that described infrared reflection film and described hot sounding film interval are arranged.
3. sound-producing device as claimed in claim 1, it is characterised in that the infrared reflection rate of described infrared reflection film is be more than or equal to 20% and less than or equal to 100%.
4. sound-producing device as claimed in claim 1, it is characterised in that described infrared reflection film includes a matrix and is arranged on a reflectance coating of this matrix surface.
5. sound-producing device as claimed in claim 4, it is characterised in that described matrix includes polymeric film or fabric.
6. sound-producing device as claimed in claim 4, it is characterised in that described reflectance coating is metallic reflective coating, and this metal is gold, silver or copper.
7. sound-producing device as claimed in claim 4, it is characterized in that, described infrared reflection film farther includes at least one dielectric film and is arranged on the described reflectance coating surface away from matrix, and the material of this dielectric film is silicon oxide, Afluon (Asta), silicon dioxide or aluminium sesquioxide.
8. sound-producing device as claimed in claim 1, it is characterised in that the material of described infrared transmission film is zinc sulfide, zinc selenide, diamond or diamond-like-carbon.
9. sound-producing device as claimed in claim 8, it is characterised in that the infrared light transmission of described infrared transmission film is be more than or equal to 10% and less than or equal to 99%.
10. sound-producing device as claimed in claim 1, it is characterised in that described first protection structure and the second protection structure have multiple through hole.
11. sound-producing device as claimed in claim 10, it is characterised in that multiple through hole gross areas of described first protection structure and the second protection structure account for the percentage ratio of the area of this first protection structure and the second protection structure respectively between 20% to 99%.
12. sound-producing device as claimed in claim 1, it is characterised in that described carbon nano tube structure includes at least one carbon nano-tube film.
13. sound-producing device as claimed in claim 12, it is characterised in that described carbon nano-tube film includes multiple CNT and joins end to end and be substantially arranged of preferred orient in the same direction, is connected with each other by Van der Waals force between CNT.
14. sound-producing device as claimed in claim 13, it is characterised in that described carbon nano tube structure includes multiple CNT film-stack and arranges.
15. sound-producing device as claimed in claim 1, it is characterised in that the unit are thermal capacitance of described hot sounding film is less than 2 × 10-4Joules per cm Kelvin.
16. sound-producing device as claimed in claim 1, it is characterised in that described hot sounding film is unsettled at least partly to be arranged between described first protection structure and described second protection structure.
17. sound-producing device as claimed in claim 16, it is characterised in that described hot sounding film is arranged between described first protection structure and described second protection structure by described at least two the first electrode and at least two the second electrode are unsettled at least partly.
18. a sound-producing device, it is connected with each other the first electrode comprising: multiple, multiple it is connected with each other the second electrode and a hot sounding film, this first electrode and the second electrode alternate intervals arrange and electrically connect with this hot sounding film, it is characterized in that, described hot sounding film includes a carbon nano tube structure, and described sound-producing device farther includes an infrared reflection film and an infrared transmission film, and described hot sounding film is arranged between this infrared reflection film and infrared transmission film.
19. sound-producing device as claimed in claim 18, it is characterised in that farther including a supporting construction, described at least one first electrode and at least one second electrode are supported by this supporting construction.
20. sound-producing device as claimed in claim 19, it is characterised in that described infrared reflection film and infrared transmission film are fixedly installed on described supporting construction and described hot sounding film interval setting.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910170294.1A CN102026079B (en) | 2009-09-11 | 2009-09-11 | Sound-producing device |
| US12/655,398 US8325947B2 (en) | 2008-12-30 | 2009-12-30 | Thermoacoustic device |
| US12/661,149 US8345896B2 (en) | 2008-12-30 | 2010-03-11 | Thermoacoustic device |
| US12/661,109 US8300856B2 (en) | 2008-12-30 | 2010-03-11 | Thermoacoustic device |
| US12/661,108 US8306246B2 (en) | 2008-12-30 | 2010-03-11 | Thermoacoustic device |
| US12/661,148 US8315415B2 (en) | 2008-12-30 | 2010-03-11 | Speaker |
| US12/661,132 US8311244B2 (en) | 2008-12-30 | 2010-03-11 | Thermoacoustic device |
| US12/661,106 US8315414B2 (en) | 2008-12-30 | 2010-03-11 | Thermoacoustic device |
| US12/661,925 US8238586B2 (en) | 2008-12-30 | 2010-03-25 | Thermoacoustic device |
| US12/756,872 US8325949B2 (en) | 2008-12-30 | 2010-04-08 | Thermoacoustic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1239394A (en) * | 1998-06-11 | 1999-12-22 | 株式会社村田制作所 | Piezoelectric acoustic component |
| CN1708700A (en) * | 2002-11-05 | 2005-12-14 | 贝克特股份有限公司 | An infra-red reflecting layered structure |
| CN101239712A (en) * | 2007-02-09 | 2008-08-13 | 清华大学 | Carbon nano-tube thin film structure and preparation method thereof |
| CN101288007A (en) * | 2005-10-26 | 2008-10-15 | 中央硝子株式会社 | Near infrared ray reflective substrate and near infrared ray reflective laminated glass employing that substrate, near infrared ray reflective double layer glass |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6839439B2 (en) * | 2002-02-14 | 2005-01-04 | Siemens Vdo Automotive Inc. | Method and apparatus for active noise control in an air induction system |
-
2009
- 2009-09-11 CN CN200910170294.1A patent/CN102026079B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1239394A (en) * | 1998-06-11 | 1999-12-22 | 株式会社村田制作所 | Piezoelectric acoustic component |
| CN1708700A (en) * | 2002-11-05 | 2005-12-14 | 贝克特股份有限公司 | An infra-red reflecting layered structure |
| CN101288007A (en) * | 2005-10-26 | 2008-10-15 | 中央硝子株式会社 | Near infrared ray reflective substrate and near infrared ray reflective laminated glass employing that substrate, near infrared ray reflective double layer glass |
| CN101239712A (en) * | 2007-02-09 | 2008-08-13 | 清华大学 | Carbon nano-tube thin film structure and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| Flexible, Stretchable, Transparent Carbon Nanotube Thin Film Loudspeakers;Xiao Liu, Feng Chen ,Liang Liu,Yang Wang,Li Qian,;《NANO LETTERS》;20080930;第8卷(第12期);第4539页右栏第2段，图1（a）、1（c） * |
| The Thermophone as a Precision Source of Sound;H.D.ARNOLD,L.B.CRANDALL;《The American Physical Society》;19171231;第10卷;第22页第1行－第2页最后一行，附图1 * |
| 从欧洲真空镀膜会议分析光学薄膜及其技术的研究和发展;黄心耕，刘江，王素英;《光学仪器》;20081031;第21卷(第4-5期);第240页 * |
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