CN102026079A - Sound production device - Google Patents
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- CN102026079A CN102026079A CN2009101702941A CN200910170294A CN102026079A CN 102026079 A CN102026079 A CN 102026079A CN 2009101702941 A CN2009101702941 A CN 2009101702941A CN 200910170294 A CN200910170294 A CN 200910170294A CN 102026079 A CN102026079 A CN 102026079A
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Abstract
The invention relates to a sound production device, which comprises a sound production module, wherein the sound production module comprises at least one first electrode, at least one second electrode and a heat sound production film; the first electrode and the second electrode are mutually and electrically connected with the heat sound production film at intervals; the heat sound production film comprises a carbon nanotube structure; the sound production device further comprises a first protective structure, a second protective structure and an infrared reflecting film; the heat sound production film is arranged between the first protective structure and the second protective structure; and the infrared reflecting film is arranged on the surface of the first protective structure.
Description
Technical field
The present invention relates to a kind of sound-producing device, relate in particular to a kind of sound-producing device based on heat sound principle.
Background technology
As far back as earlier 1900s, people such as H.D.Arnold have proposed a kind of thermophone based on thermoacoustic effect, see also document " The thermophone as a precision source of sound ", H.D.Arnold, I.B.Crandall, Phys.Rev.10,22-38 (1917) and " On Some Thermal Effects of Electric Currents ", William Henry Preece, Proceedings of the Royal Society of London, Vol.30, pp408-411 (1879-1881).This thermophone is realized sounding by feed alternating current in a conductor.This conductor must have less thermal capacitance, thin thickness, and the characteristics that can give surrounding gas medium with the rapid conduction of its inner heat that produces.When alternating current when the conductor, with the variation of AC current intensity, conductor heating and cooling rapidly, and heat exchange takes place rapidly with surrounding gas medium, the surrounding gas medium molecular motion, gas medium density also changes thereupon, and then sends sound wave.In the prior art, the most effective conductor is a metal.
H.D.Arnold and I.B.Crandall are at document " The thermophone as a precision source of sound ", Phys.Rev.10, introduced a kind of simple thermophone among the pp22-38 (1917), it adopts a platinized platinum to make sounding component, and the thickness of this platinized platinum is 0.7 micron.See also Fig. 1, this sounding component 102 is fixing by anchor clamps 104.Described sounding component 102 and anchor clamps 104 are arranged on a matrix 108 surfaces.One current feed 106 is electrically connected with described sounding component 102, is used for to described sounding component 102 input electrical signals.Because audible frequency and its unit are thermal capacitance of sounding component 102 are closely related.The unit are thermal capacitance is big, audible frequency narrow range then, and intensity is low; The unit are thermal capacitance is little, audible frequency wide ranges then, intensity height.Desire obtains to have the sound wave of broad audible frequency scope and higher-strength, then requires the unit are thermal capacitance of sounding component 102 to heal better little.And the metal platinized platinum with less thermal capacitance is subjected to the restriction of material itself, and its thickness minimum can only reach 0.7 micron, and the unit are thermal capacitance of the platinized platinum of 0.7 micron thickness is 2 * 10
-4Every square centimeter of Kelvin of joule.Be subjected to the restriction of material unit are thermal capacitance, adopting this platinized platinum to make the audible frequency of acoustical generator of sounding component 102, the highest only can to reach 4 KHz and intensity of phonation lower.Therefore, utilize the above-mentioned thermophone of thermoacoustic effect can't satisfy daily use.
Summary of the invention
In view of this, necessaryly provide a kind of sound-producing device, the frequency range broad of this sound-producing device, intensity of phonation is higher and sounding effect is better.
A kind of sound-producing device; it comprises: a sounding module; this sounding module comprises at least one first electrode; at least one second electrode and a hot sounding film; this first electrode and second electrode are electrically connected with this hot sounding film spaced reciprocally; wherein; described hot sounding film comprises a carbon nano tube structure; described sound-producing device further comprises one first protection structure, one second a 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, it comprises: at least one first electrode, at least one second electrode and a hot sounding film, this first electrode and second electrode are electrically connected with this hot sounding film spaced reciprocally, wherein, described hot sounding film comprises a carbon nano tube structure, and described sound-producing device further comprises an infrared reflection film and an infrared transmission film, and described hot sounding film is arranged between this infrared reflection film and the 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, audible frequency wider range of described sound-producing device, and intensity of phonation is higher and sounding effect is better.
Description of drawings
Fig. 1 is the structural representation that the available technology adopting carbon nano-tube film is made the sound-producing device of hot sounding film.
Fig. 2 is the three-dimensional decomposition texture schematic diagram of the sound-producing device that provides of first embodiment of the invention.
Fig. 3 is the stereoscan photograph that first embodiment of the invention is used as the carbon nano-tube membrane of hot sounding film.
Fig. 4 is the structural representation that first embodiment of the invention adopts the sounding module of a plurality of electrodes.
Fig. 5 is the three-dimensional decomposition texture schematic diagram of the sound-producing device that provides of second embodiment of the invention.
Fig. 6 is the three-dimensional decomposition texture schematic diagram of the sound-producing device that provides of third embodiment of the invention.
Embodiment
Describe the sound-producing device of the embodiment of the invention in detail below with reference to accompanying drawing.
See also Fig. 2, first embodiment of the invention provides a kind of sound-producing device 10, and this sound-producing device 10 comprises a sounding module 110, one first protection structures 120, one second a protection structure 130 and an infrared reflection film 140.The 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 the described first protection structure 120 surfaces.
Described sounding module 110 comprises a hot sounding film 112, at least one first electrode 114 and at least one second electrode 116.Described first electrode 114 and second electrode 116 are electrically connected with this hot sounding film 112 spaced reciprocally.Particularly, described first electrode 114 and second electrode 116 are provided with at interval, and described hot sounding film 112 can be arranged between described first electrode 114 and second electrode 116.The signal that described hot sounding film 112 can be accepted described first electrode 114 and 116 inputs of second electrode sends sound wave.
Described hot sounding film 112 is arranged between this first protection structure 120 and the second protection structure 130.Described hot sounding film 112 can comprise a carbon nano tube structure.This carbon nano tube structure comprises a plurality of carbon nano-tube.Described carbon nano tube structure is a self supporting structure.So-called self supporting structure is to attract each other by Van der Waals force between a plurality of carbon nano-tube in the carbon nano tube structure, thereby makes carbon nano tube structure have specific shape, can unsettledly be provided with, and still keeps its specific shape.In the present embodiment, described hot sounding film 112 is arranged between described first protection structure 120 and the described second protection structure 130 to small part is unsettled.Particularly, described hot sounding film 112 can be protected between the structure 130 by described first electrode 114 and the unsettled described first protection structure 120 and described second that is arranged on of second electrode, 116 parts.Described carbon nano tube structure is stratiform and has bigger specific 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 can be less than 2 * 10
-4Every square centimeter of Kelvin of joule.Preferably, the unit are thermal capacitance of described carbon nano tube structure can be more than or equal to 1.7 * 10
-6Joule of every square centimeter Kelvin and smaller or equal to 1.7 * 10
-5Every square centimeter of Kelvin of joule.In the present embodiment, the unit are thermal capacitance of described carbon nano tube structure is 1.7 * 10
-6Every square centimeter of Kelvin of joule.Carbon nano-tube in the described carbon nano tube structure comprises one or more in Single Walled Carbon Nanotube, double-walled carbon nano-tube and the multi-walled carbon nano-tubes.The diameter of described Single Walled Carbon Nanotube 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 comprise at least one carbon nano-tube film.Particularly, described carbon nano tube structure can comprise a plurality of parallel and do not have the gap and lay or/and the carbon nano-tube film of stacked laying.Described carbon nano-tube film comprises a plurality of equally distributed carbon nano-tube, combines closely by Van der Waals force between the carbon nano-tube.Carbon nano-tube in this carbon nano-tube film can be orderly arrangement or lack of alignment.The so-called arrangement in order is meant that the orientation of carbon nano-tube is regular.So-called lack of alignment is meant that the orientation of carbon nano-tube is random.Particularly, when carbon nano tube structure comprised the carbon nano-tube of lack of alignment, carbon nano-tube was twined mutually or this carbon nano tube structure is an isotropism; When carbon nano tube structure comprises orderly carbon nanotubes arranged, carbon nano-tube is arranged of preferred orient along a direction, perhaps carbon nano tube structure comprises a plurality of parts, carbon nano-tube is arranged of preferred orient along a direction in each part, and the carbon nano-tube in adjacent two parts can be arranged along different directions.Particularly, described carbon nano-tube film comprises one or more in carbon nano-tube membrane, carbon nano-tube laminate, the carbon nano-tube waddingization film.
Described carbon nano-tube membrane comprises and a plurality ofly is parallel to each other substantially and is basically parallel to carbon nano-tube membrane surface carbon nanotubes arranged.Particularly, described carbon nano-tube membrane comprises that a plurality of carbon nano-tube join end to end by Van der Waals force and are arranged of preferred orient along same direction substantially.Described carbon nano-tube membrane can be a self supporting structure by directly pull acquisition from carbon nano pipe array.The thickness of described carbon nano-tube membrane can be 0.5 nanometer～100 micron, and width is relevant with the size of the carbon nano pipe array that pulls this carbon nano-tube membrane, and length is not limit.The stereoscan photograph of described carbon nano-tube membrane sees also Fig. 3.Particularly, each carbon nano-tube membrane comprise a plurality of continuously and the carbon nano-tube fragment that aligns.These a plurality of carbon nano-tube fragments join end to end by Van der Waals force.Each carbon nano-tube fragment comprises a plurality of carbon nano-tube that are parallel to each other, and these a plurality of carbon nano-tube that are parallel to each other are combined closely by Van der Waals force.Be appreciated that by a plurality of carbon nano-tube membranes are parallel and do not have that the gap is laid or/and stacked laying, can prepare the carbon nano tube structure of different area and thickness.When described carbon nano tube structure comprised the carbon nano-tube membrane of a plurality of stacked settings, the orientation of the carbon nano-tube in the adjacent carbon nano-tube membrane formed an angle α, and α is more than or equal to 0 degree and smaller or equal to 90 degree (0 °≤α≤90 °).Carbon nano-tube membrane, the especially multilayer of the multilayer laminated setting relative single-layer carbon nano-tube membrane of carbon nano-tube membrane arranged in a crossed manner has higher intensity, thereby helps improving the intensity of described hot sounding film 112.Structure of described carbon nano-tube membrane and preparation method thereof sees also people such as Fan Shoushan and applies on February 9th, 2007, in disclosed 101239712A number Chinese publication application on August 13rd, 2008.
Described carbon nano-tube laminate comprises equally distributed carbon nano-tube.Described carbon nano-tube laminate can be isotropism or comprises a plurality of parts, and carbon nano-tube is arranged of preferred orient along a direction in each part, and the carbon nano-tube in adjacent two parts can be arranged or arrange along equidirectional along different directions.Carbon nano-tube in the described carbon nano-tube laminate overlaps mutually.Described carbon nano-tube laminate can obtain by rolling a carbon nano pipe array.This carbon nano pipe array is formed on a substrate surface, the surface of the carbon nano-tube in the prepared carbon nano-tube laminate and the substrate of this carbon nano pipe array β that has angle, and wherein, β is more than or equal to 0 degree and smaller or equal to 15 degree (0≤β≤15 °).Described carbon nano-tube laminate is the structure of a self-supporting, can need not substrate support, and self-supporting exists.Described carbon nano-tube laminate and preparation method thereof sees also people such as Fan Shoushan and applies on June 1st, 2007, in disclosed No. 101284662 Chinese publication application on October 15th, 2008.Described carbon nano-tube waddingization film comprises mutual winding and equally distributed carbon nano-tube, and length of carbon nanotube can be greater than 10 centimetres.Attract each other, twine by Van der Waals force between the described carbon nano-tube, form network-like structure.Described carbon nano-tube waddingization film isotropism.Carbon nano-tube in the described carbon nano-tube waddingization film is evenly to distribute, and random arrangement forms a large amount of microcellular structures, and micropore size is 1 nanometer～10 micron.Described carbon nano-tube waddingization film and preparation method thereof sees also people such as Fan Shoushan and applies on April 13rd, 2007, in disclosed No. 101314464 Chinese publication application on December 3rd, 2008.
Described first electrode 114 and second electrode 116 are formed by electric conducting material, and its shape can be bar-shaped or strip.Particularly, the material of described first electrode 114 and second electrode 116 may be selected to be metal, metallic carbon nanotubes etc.Wherein, described metal comprises stainless steel, tungsten, copper, molybdenum or silver etc.In the embodiment of the invention, described first electrode 114 and second electrode 116 are the ribbon metal electrode, and this ribbon metal electrode can have self supporting structure.Described first electrode 114 and second electrode 116 can be used for supporting described hot sounding film 112 and input signal to described hot sounding film 112.The signal of being imported comprises ac signal or audio electrical signal etc.Because described first electrode 114 and second electrode 116 are provided with at interval, described hot sounding film 112 can insert certain resistance and avoid short circuit phenomenon to produce when being applied to sound-producing device 10.
Be appreciated that described sound-producing device 10 can further comprise a plurality of first electrodes 114 and a plurality of second electrode 116.See also Fig. 4, described a plurality of first electrodes 114 and the 116 alternate intervals settings of a plurality of second electrode have one second electrode 116 between promptly any two first adjacent electrodes 114, and between any two second adjacent electrodes 116 one first electrode 114 are arranged.Preferably, the distance between described a plurality of first electrode 114 and a plurality of second electrode 116 equates.Further, described a plurality of first electrodes 114 can be electrically connected, and described a plurality of second electrodes 116 can be electrically connected.Particularly, described a plurality of first electrodes 114 can be electrically connected the back as a signal input part by lead, and described a plurality of second electrodes 116 can be electrically connected the back as another signal input part by lead.During use, can be by above-mentioned two signal input part input electrical signals to described hot sounding film 112.Above-mentioned connected mode can realize the parallel connection of the hot sounding film 112 between the adjacent electrode.The resistance of the hot sounding film 112 after the parallel connection can reduce operating voltage less than the resistance of hot sounding film 112 before in parallel.
In the present embodiment, described carbon nano tube structure as hot sounding film 112 comprises one deck carbon nano-tube membrane.Carbon nano-tube is arranged of preferred orient along same direction in this carbon nano tube structure.Described sound-producing device 10 comprises one first electrode 114 and one second electrode 116.Described carbon nano-tube is arranged of preferred orient along the direction of described first electrode, 114 to second electrodes 116.The thickness of described carbon nano tube structure is 50 nanometers.Because carbon nano-tube has great specific area, under the effect of Van der Waals force, this carbon nano tube structure itself has good adhesiveness, so when adopting this carbon nano tube structure to make hot sounding film 112, can directly be adhered fixed between described first electrode 114 and second electrode 116 and the described hot sounding film 112, and formation well electrically contacts.
The described first protection structure 120 and the second protection structure 130 can be used for protecting described sounding module 110.The described first protection structure 120 and the second protection structure 130 can be stratiform or tabular.Be arranged at the both sides of described sounding module 110 respectively, wherein, the described first protection structure 120 is arranged on the side of described sound-producing device 10 in the face of the user.The material of the described first protection structure 120 and the second protection structure 130 is not limit, and only need satisfy it and have the better heat-resisting performance and get final product.Preferably, the described first protection structure 120 and the second protection structure 130 have higher sound transmitance.The shape of the described first protection structure 120 and the second protection structure 130 is not limit, and can be a plane and can be a curved surface yet.The material of the described first protection structure 120 and the second protection structure 130 may be selected to be electric conducting material, as metal, also can be insulating material, as plastic cement, plastics etc.Described metal comprises one or more in stainless steel, carbon steel, copper, nickel, titanium, zinc and the aluminium etc.The described first protection structure 120 and the second protection structure 130 can be a loose structure, as aperture plate, also can be a non-porous structure, as glass plate, quartz plate etc.When this glass plate or quartz plate during as the second protection structure 130, this glass plate or quartz plate should have infrared transmission performance preferably.In addition; when this glass plate or quartz plate during as the second protection structure 130; described first electrode 114 and second electrode 116 can be formed directly on the described second protection structure 130 surfaces, and at this moment, described hot sounding film 112 can unsettledly be arranged between described first electrode 114 and second electrode 116.
In the embodiment of the invention, the described first protection structure 120 and the second protection structure 130 are a loose structure.Particularly, the described first protection structure 120 and the second protection structure 130 are a plastic cement aperture plate, and described plastic cement aperture plate has a plurality of through holes.The through hole gross area of the described first protection structure 120 and the second protection structure 130 accounts for the percentage of area of this first protection structure 120 and the second protection structure 130 respectively can be greater than 0% less than 100%; preferably, the gross area of described first protection structure 120 and the through hole of second protection in the structure 130 accounts for the percentage of area of this described first protection structure 120 and the second protection structure 130 respectively between 20% to 99%.The distribution and the shape of these a plurality of through holes are not limit.
Described infrared reflection film 140 is provided with at interval with described hot sounding film 112.Described infrared reflection film 140 can be arranged on the outer surface or the inner surface of the described first protection structure 120.Described infrared reflection film 140 has infrared reflection performance preferably, can change the ultrared direction of propagation that gives off from hot sounding film 112.Described infrared reflection film 140 can be used for hot sounding film 112 is reflexed to (comprising near infrared ray and far infrared) to the infrared ray of user's one side radiation the opposite side (side that promptly deviates from the user) of hot sounding film 140.Preferably, described infrared reflection film 140 also has effect of heat insulation preferably.The material of described infrared reflection film 140 is not limit, and only need satisfy it and have higher infrared reflection rate and get final product.The infrared reflection rate of described infrared reflection film 140 can be more than or equal to 20% and smaller or equal to 100%.Preferably, the infrared reflection rate of described infrared reflection film 140 is more than or equal to 70% and smaller 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 comprise a matrix and be arranged on a reflectance coating of this matrix surface.This reflectance coating is a metallic reflective coating.This metal comprises that gold, silver or copper etc. have the material of better properties of infrared reflection.Described matrix comprises polymer or fabric.Described polymer comprises polyester film etc.Described metallic reflective coating can prepare by the metal material that has the high infrared ray reflectivity at matrix surface sputter one deck.In addition, the surface away from matrix of described metallic reflective coating can further be provided with at least one dielectric film, and the material of this dielectric film can comprise silica, magnesium fluoride, silicon dioxide or alundum (Al 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 provided with a silverskin for the transparent polyester film surface, and this infrared reflection film 140 is arranged on the outer surface of the described first protection structure 120.When the described first protection structure 120 was a non-porous structure, described infrared reflection film 140 can only comprise a metallic reflective coating, and described metallic reflective coating also can be formed directly on the described first protection structure 120 surfaces.
Described infrared reflection film 140 is not limit with the distance of hot sounding film 112.Preferably, described infrared reflection film 140 to be influencing the heat exchange between described hot sounding film 112 and the surrounding medium, and can effectively infrared reflection be advisable to sound-producing device 10 rear sides.In the present embodiment, described infrared reflection film 140 is about 10 millimeters with the distance of hot sounding film 112.
Above-mentioned sound-producing device 10 in use, because carbon nano tube structure is made up of equally distributed carbon nano-tube, and this carbon nano tube structure is stratiform, have bigger specific area, so this carbon nano tube structure has less unit are thermal capacitance and bigger heat-delivery surface, behind input signal, carbon nano tube structure heating and cooling rapidly, produce periodic variations in temperature, and and surrounding medium carry out heat exchange fast, make surrounding medium property density cycle change, and then sound.The sounding principle of described hot sounding film 112 is the conversion of " electricity-Re-sound ".Described sound-producing device 10 in use, hot sounding film 112 is carried out thermal radiation towards periphery and is carried out heat exchange fast with surrounding medium in electromagnetic mode.The present invention controls the ultrared direction of propagation that gives off from hot sounding film 112 by protecting structure 120 surfaces that one infrared reflection film 140 is set at described sound-producing device 10 towards first of user's one side; to the infrared reflection of user's one side radiation opposite side, and then make the user who is positioned at infrared reflection film 140 1 sides can not feel heat described hot sounding film 112 to hot sounding film 112.
The sound pressure level of the sound-producing device 10 that the embodiment of the invention provides is greater than 50 decibels of every watt of sound pressure levels, and the audible frequency scope is 1 hertz to 100,000 hertz (being 1Hz-100kHz).The distortion factor of described sound-producing device in 500 hertz-40,000 hertz frequency scopes can be less than 3%.When the monolayer carbon nanometer film that adopts the A4 paper size during as described hot sounding film 112, one microphone is arranged on the position of 5 centimetres of the hot sounding film of distance, when input voltage is 50 volts, the audible frequency of measured sound-producing device 10 is more than or equal to 100 hertz and smaller or equal to 100,000 hertz, and intensity of phonation is greater than 50 decibels of every watt of sound pressure levels.Audible frequency wider range of described sound-producing device 10, intensity is bigger, and sounding effect is better.
See also Fig. 5, second embodiment of the invention provides a kind of sound-producing device 20, and this sound-producing device 20 comprises a sounding module 210, one first protection structures 220, one second protection structure 230, an infrared reflection film 240 and an infrared transmission film 250.Described sounding module 210 comprises a hot sounding film 212, at least one first electrode 214 and at least one second electrode 216.The 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 surfaces.Described infrared transmission film 250 is arranged on the second protection structure, 230 surfaces.
The structure of sound-producing device 20 that second embodiment of the invention provides and the sound-producing device 10 of first embodiment is basic identical.Difference is that the sound-producing device 20 that second embodiment of the invention provides further comprises an infrared transmission film 250, and this infrared transmission film 250 is arranged on the surface of the described second protection structure 230.This infrared transmission film 250 helps improving the infrared ray transmitance of described sound-producing device 20 in the second protection structure, 230 1 sides.In addition, when the described second protection structure, 230 employings, one loose structure, during as aperture plate, described infrared transmission film 250 can further play the effect of the described hot sounding film 212 of protection.The material of described infrared transmission film 250 can be existing material with higher infrared ray transmitance.The infrared ray transmitance of described infrared transmission film 250 can be more than or equal to 10% and smaller or equal to 99%.Preferably, the infrared ray transmitance of described infrared transmission film 250 can be more than or equal to 60% and smaller or equal to 99%.In the present embodiment, the infrared ray transmitance of described infrared transmission film 250 is 90%.The material of described infrared transmission film 250 comprises that zinc sulphide, zinc selenide, diamond, diamond-like-carbon etc. have the material of higher infrared transmittivity at the infrared ray wave band.
See also Fig. 6, third embodiment of the invention provides a kind of sound-producing device 30, and this sound-producing device 30 comprises a sounding module 310, one infrared reflection films 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 in described sounding module 310.Described sounding module 310 comprises a hot sounding film 312, one first electrode 314, one second electrode 316 and a supporting construction 318.This hot sounding film 312 is arranged between described infrared reflection film 340 and the infrared transmission film 350.
The structure of sound-producing device 30 that the 3rd embodiment provides and the sound-producing device 10 of first embodiment is basic identical.Difference is that the sound-producing device 30 that third embodiment of the invention provides only comprises a sounding module 310, one infrared reflection films 340 and an infrared transmission film 350, and described sounding module 310 further comprises a supporting construction 318.Described sound-producing device 30 does not comprise the described first protection structure and the second protection structure.Described infrared reflection film 340 and infrared transmission film 350 can further play the effect of the described hot sounding film 312 of protection.This supporting construction 318 is made by insulating material, and this insulating material can be glass, pottery, resin, wood materials, quartz or plastics etc.This supporting construction 318 can comprise end to end four side plates (figure is mark not), i.e. first side plate, second side plate, the 3rd side plate and the 4th side plate.Described first side plate, second side plate, the 3rd side plate and the 4th side plate can be one-body molded.And the parallel interval setting relative of first side plate with the 3rd side plate, and second side plate is relative with the 4th side plate and the parallel interval setting.Described first side plate, second side plate, space of the common formation of the 3rd side plate and the 4th side plate, described hot sounding film 312 is arranged in this space by described first electrode 314 and second electrode 316.The two ends of described first electrode 314 and second electrode 316 are supported by the side plate that two of described supporting construction 318 be arranged in parallel mutually.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 set in the side plate of described supporting construction 318 respectively by modes such as binding agents.In the present embodiment, described infrared reflection film 340 and infrared transmission film 350 are fixedly set in four side plates of described supporting construction 318 respectively by binding agent.Be appreciated that the infrared transmission film 350 in the present embodiment is selectable structure.
Sound-producing device provided by the invention has the following advantages: one, adopt carbon nano tube structure to make hot sounding film, this carbon nano tube structure has less unit are thermal capacitance, audible frequency wider range of described sound-producing device, and intensity of phonation is higher and sounding effect is better.They are two years old, sound-producing device provided by the invention is further by being provided with infrared reflection that an infrared reflection film sends from described hot sounding film to the infrared reflection film one side opposite side to hot sounding film in sounding module one side, and then makes the user who is positioned at infrared reflection film one side can not feel heat.Its two, described sound-producing device can protect structure and hot sounding film to form by stratiform, hot sounding film is arranged between described two stratiforms protection structure, stratiform protection structure can shield to hot sounding film, makes hot sounding film not subject to outside destroy.Its three, described sound-producing device can only comprise sounding module, infrared reflection film and infrared transmission film, this moment, described infrared reflection film and infrared transmission film can further play the effect of the described hot sounding film of protection, thereby made the structure of described sound-producing device comparatively simple.
In addition, those skilled in the art also can do other variation in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.
Claims (20)
1. sound-producing device; it comprises: a sounding module; this sounding module comprises at least one first electrode; at least one second electrode and a hot sounding film; this first electrode and second electrode are electrically connected with this hot sounding film spaced reciprocally; it is characterized in that; described hot sounding film comprises a carbon nano tube structure; described sound-producing device further comprises one first protection structure, one second a 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.
2. sound-producing device as claimed in claim 1 is characterized in that, described infrared reflection film and described hot sounding film are provided with at interval.
3. sound-producing device as claimed in claim 1 is characterized in that, the infrared reflection rate of described infrared reflection film is more than or equal to 20% and smaller or equal to 100%.
4. sound-producing device as claimed in claim 1 is characterized in that, described infrared reflection film comprises a matrix and is arranged on a reflectance coating of this matrix surface.
5. sound-producing device as claimed in claim 4 is characterized in that described matrix comprises polymer film or fabric.
6. sound-producing device as claimed in claim 4 is characterized in that, described reflectance coating is a 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 comprises that further at least one dielectric film is arranged on the surface of described reflectance coating away from matrix, and the material of this dielectric film is silica, magnesium fluoride, silicon dioxide or alundum (Al.
8. sound-producing device as claimed in claim 1; it is characterized in that; described sound-producing device comprises that further an infrared transmission film is arranged on the surface of the described second protection structure, and the material of described infrared transmission film is zinc sulphide, zinc selenide, diamond or diamond-like-carbon.
9. sound-producing device as claimed in claim 8 is characterized in that, the infrared ray transmitance of described infrared transmission film is more than or equal to 10% and smaller or equal to 100%.
10. sound-producing device as claimed in claim 1 is characterized in that, the described first protection structure and the second protection structure have a plurality of through holes.
11. sound-producing device as claimed in claim 10 is characterized in that, a plurality of through hole gross areas of the described first protection structure and the second protection structure account for the percentage of 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 is characterized in that, described carbon nano tube structure comprises at least one carbon nano-tube film.
13. sound-producing device as claimed in claim 12 is characterized in that, described carbon nano-tube film comprises that a plurality of carbon nano-tube join end to end and are arranged of preferred orient along same direction substantially, interconnect by Van der Waals force between the carbon nano-tube.
14. sound-producing device as claimed in claim 13 is characterized in that, described carbon nano tube structure comprises the setting of a plurality of carbon nano-tube film-stack.
15. sound-producing device as claimed in claim 1 is characterized in that, the unit are thermal capacitance of described hot sounding film is less than 2 * 10
-4Every square centimeter of Kelvin of joule.
16. sound-producing device as claimed in claim 1 is characterized in that, described hot sounding film is arranged between described first protection structure and the described second protection structure to small part is unsettled.
17. sound-producing device as claimed in claim 16 is characterized in that, described hot sounding film is arranged on described first protection structure and described second protection structure between to small part unsettled by described two electrodes at least.
18. sound-producing device, it comprises: at least one first electrode, at least one second electrode and a hot sounding film, this first electrode and second electrode are electrically connected with this hot sounding film spaced reciprocally, it is characterized in that, described hot sounding film comprises a carbon nano tube structure, and described sound-producing device further comprises an infrared reflection film and an infrared transmission film, and described hot sounding film is arranged between this infrared reflection film and the infrared transmission film.
19. sound-producing device as claimed in claim 18 is characterized in that, further comprises a supporting construction, described at least one first electrode and at least one second electrode are by this support construction supports.
20. sound-producing device as claimed in claim 19 is characterized in that, described infrared reflection film and infrared transmission film are fixedly set in described supporting construction, and are provided with at interval with described hot sounding film.
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 |
| US12/661,132 US8311244B2 (en) | 2008-12-30 | 2010-03-11 | Thermoacoustic device |
| US12/661,109 US8300856B2 (en) | 2008-12-30 | 2010-03-11 | Thermoacoustic device |
| US12/661,148 US8315415B2 (en) | 2008-12-30 | 2010-03-11 | Speaker |
| US12/661,149 US8345896B2 (en) | 2008-12-30 | 2010-03-11 | Thermoacoustic device |
| US12/661,106 US8315414B2 (en) | 2008-12-30 | 2010-03-11 | Thermoacoustic device |
| US12/661,108 US8306246B2 (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 |
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Citations (5)
| 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 |
| US20030152238A1 (en) * | 2002-02-14 | 2003-08-14 | Siemens Vdo Automative, Inc. | Method and apparatus for active noise control in an air induction system |
| 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 |
-
2009
- 2009-09-11 CN CN200910170294.1A patent/CN102026079B/en active Active
Patent Citations (5)
| 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 |
| US20030152238A1 (en) * | 2002-02-14 | 2003-08-14 | Siemens Vdo Automative, Inc. | Method and apparatus for active noise control in an air induction system |
| 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 (4)
| Title |
|---|
| H.D.ARNOLD,L.B.CRANDALL: "The Thermophone as a Precision Source of Sound", 《THE AMERICAN PHYSICAL SOCIETY》 * |
| XIAO LIU, FENG CHEN ,LIANG LIU,YANG WANG,LI QIAN,: "Flexible, Stretchable, Transparent Carbon Nanotube Thin Film Loudspeakers", 《NANO LETTERS》 * |
| 川勝晃，江涛: ""利用红外反射节省光源能量"", 《红外》 * |
| 黄心耕，刘江，王素英: "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", 《光学仪器》 * |
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