CN101610444B - Sounding device - Google Patents
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- CN101610444B CN101610444B CN 200910139278 CN200910139278A CN101610444B CN 101610444 B CN101610444 B CN 101610444B CN 200910139278 CN200910139278 CN 200910139278 CN 200910139278 A CN200910139278 A CN 200910139278A CN 101610444 B CN101610444 B CN 101610444B
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Abstract
The invention relates to a sounding device, which comprises a sounding element and a signal input device used for outputting an electrical signal to the sounding device, wherein the sounding device comprises a support structure, at least part of the sounding element is supported by the support structure, the sounding element comprises at least one layer of carbon nanotube film, the carbon nanotube film comprises a plurality of carbon nanotubes which are connected end to end, and the carbon nanotube film is used for receiving the electrical signal output by the signal input device and emitting the corresponding sound waves. The sounding device can be used in devices such as headphones, speakers, radios and the like, which can produce sound.
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 carbon nano-tube.
Background technology
Sound-producing device generally is comprised of signal input apparatus and sounding component., and then sound to sounding component by the signal input apparatus input electrical signal.Sounding component of the prior art is generally a loud speaker.This loud speaker is a kind of electro-acoustic element that the signal of telecommunication is converted to voice signal.Particularly, can to change the audio-frequency electric power signal in the certain limit into distortion by the transducing mode little and have a sub-audible sound of enough sound pressure levels for loud speaker.
The kind of existing loud speaker is a lot, according to its operation principle, is divided into: dynamic speaker, electromagnetic loudspeaker, electrostatic loudspeaker and piezo-electric loudspeaker.Although their working method is different, generally is by producing mechanical oscillation and promotes ambient air, thereby make air dielectric produce the conversion that fluctuation realizes " electricity-Li-sound ".Wherein, dynamic speaker is most widely used.
See also Fig. 1, existing dynamic speaker 100 is comprised of three parts usually: voice coil loudspeaker voice coil 102, magnet 104 and vibrating diaphragm 106.Voice coil loudspeaker voice coil 102 adopts electrical conductor usually, and when inputting a tone currents signal in the voice coil loudspeaker voice coil 102, voice coil loudspeaker voice coil 102 is equivalent to a current－carrying conductor.Because be placed in the magnetic field of described magnet 104 generations, this current－carrying conductor can be subject to the effect of Lorentz force in magnetic field, thereby makes voice coil loudspeaker voice coil 102 can be subject to the power that a size is directly proportional with tone currents, direction changes with the tone currents direction.So, voice coil loudspeaker voice coil 102 will vibrate under the magnetic fields that described magnet 104 produces in generation, and drives vibrating diaphragm 106 vibrations, and the air of vibrating diaphragm 106 front and back is thereupon vibration also, converts the electrical signal to sound wave to radiation all around.Yet the structure of this dynamic speaker 100 is comparatively complicated, and it must be worked having under the condition of magnetic.
Since the early 1990s, (see also Helical microtubules of graphiticcarbon with carbon nano-tube, Nature, Sumio Iijima, vol 354, p56 (1991)) caused that with its unique structure and character people pay close attention to greatly for the nano material of representative.In recent years, along with deepening continuously of carbon nano-tube and nano materials research, its wide application prospect constantly displayed.For example, because performances such as the electromagnetism of the uniqueness that carbon nano-tube has, optics, mechanics, chemistry, a large amount of relevant its application studies in fields such as field emitting electronic source, transducer, novel optical material, soft ferromagnetic materials constantly are in the news.Yet, find not yet but in the prior art that carbon nano-tube is used for field of acoustics.
Summary of the invention
In view of this, necessaryly provide a kind of sound-producing device, this sound-producing device is simple in structure, can work under the condition without magnetic.
A kind of sound-producing device, it comprises: a sounding component; And a signal input apparatus, be used for output electrical signals to this sounding component; Wherein, this sound-producing device comprises a supporting construction, described sounding component is at least part of by this support construction supports, this sounding component comprises at least one deck carbon nano-tube film, this carbon nano-tube film comprises a plurality of end to end carbon nano-tube, and this carbon nano-tube film sends corresponding sound wave for the signal of telecommunication that receives described signal input apparatus output.
A kind of sound-producing device, it comprises: a signal input apparatus; At least two electrodes, this at least two electrode gap setting; And a thermic sounding film, this thermic sounding film receives the signal of telecommunication of described signal input apparatus output at least by described two electrodes; Wherein, this sound-producing device comprises a supporting construction, this supporting construction has a stayed surface, the at least part of support construction supports of passing through of described thermic sounding film, and with this stayed surface almost parallel, this thermic sounding film comprises at least one deck carbon nano-tube film, and this carbon nano-tube film comprises a plurality of end to end carbon nano-tube, and this carbon nano-tube film sends corresponding sound wave by the signal of telecommunication that described at least two electrodes receive described signal input apparatus output.
A kind of thermo-acoustic device wherein, comprising: a carbon nano-tube membrane structure, comprise at least one deck carbon nano-tube film, and this carbon nano-tube film comprises the carbon nano-tube that a plurality of head and the tail link to each other by Van der Waals force; One supporting construction, this carbon nano-tube membrane structure is fixed in supporting construction, and this carbon nano-tube membrane structure is basically with respect to the unsettled setting of this supporting construction; And a signal input apparatus, be used for output electrical signals to this thermic sounding component; This carbon nano-tube membrane structure is sent corresponding sound wave for the signal of telecommunication that receives described signal input apparatus output.
Sound-producing device provided by the invention has the following advantages: one, because the sounding component in the described sound-producing device comprises carbon nano-tube film, need not other labyrinths such as magnet, therefore the structure of this sound-producing device is comparatively simple, be conducive to reduce the cost of this sound-producing device.Its two, this sound-producing device utilizes input signal to cause this sounding component variations in temperature, thereby its surrounding medium is expanded rapidly and shrinks, and then sends sound wave, need not vibrating diaphragm, and the sound-producing device that this sounding component forms can be worked under the condition without magnetic.They are three years old, because carbon nano-tube film has less unit are thermal capacitance and larger specific area, and the carbon nano-tube in the carbon nano-tube film joins end to end, behind input signal, variation according to signal strength signal intensity (such as current strength), the sounding component that is comprised of one deck carbon nano-tube film at least is the medium of circumference equably, rapidly heating and cooling, produce periodic variations in temperature, and and surrounding medium carry out Rapid Thermal exchange, surrounding medium is expanded rapidly and contraction, send the appreciable sound of people's ear, be the thermic sounding, and the frequency range of the sound that sends is wider, sounding effect is better.In addition, when the Thickness Ratio of this sounding component hour, this sounding component has higher transparency, therefore formed sound-producing device is the transparent sound production device, can be directly installed on the surface of the display surface of various display unit, mobile phone display screen or oil painting as joint space-efficient transparent sound production device.They are four years old, because carbon nano-tube has preferably mechanical strength and toughness, therefore the carbon nano-tube film that is comprised of end to end carbon nano-tube has preferably mechanical strength and toughness, durability is better, thereby be conducive to prepare the various shapes that formed by carbon nano-tube film, the sound-producing device of size, and then be conveniently used in various fields.
Description of drawings
Fig. 1 is the structural representation of loud speaker in the prior art.
Fig. 2 is the structural representation of first embodiment of the invention sound-producing device.
Fig. 3 is the stereoscan photograph of carbon nano-tube film in the first embodiment of the invention sound-producing device.
Fig. 4 is the structural representation of the carbon nano-tube fragment in the carbon nano-tube film among Fig. 3.
Fig. 5 is the frequency response characteristic of first embodiment of the invention sound-producing device.
Fig. 6 is the structural representation of second embodiment of the invention sound-producing device.
Fig. 7 is the structural representation of third embodiment of the invention sound-producing device.
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 is a thermo-acoustic device.This sound-producing device 10 comprises a signal input apparatus 12, one sounding component 14, one supporting constructions, 16, one first electrodes 142 and one second electrodes 144.Described sounding component 14 supports by described supporting construction 16.Described the first electrode 142 and the second electrode 144 intervals arrange and are electrically connected with described sounding component 14.Described the first electrode 142 and the second electrode 144 are electrically connected with the two ends of described signal input apparatus 12, are used for the signal of telecommunication of described signal input apparatus 12 is input in the described sounding component 14.
Described supporting construction 16 mainly plays a supportive role, and its shape is not limit, and any object with definite shape such as a wall or desktop, all can be used as the supporting construction 16 in the first embodiment of the invention.Particularly, described supporting construction 16 can be a planar structure or a curved-surface structure, and has a surface.At this moment, this sounding component 14 can directly arrange and fit in the surface of this supporting construction 16.
The material of this supporting construction 16 is not limit, and can be a hard material, such as diamond, glass or quartz.In addition, described supporting construction 16 also can be a flexible material, such as plastics or resin.Preferably, the material of this supporting construction 16 should have preferably heat-insulating property, thereby prevents excessive being absorbed by this supporting construction 16 of heat that this sounding component 14 produces, and can't reach the purpose of circumference medium and then sounding.In addition, this supporting construction 16 preferably has a comparatively coarse stayed surface, thereby can make to be arranged at above-mentioned supporting construction 16 surface-supported sounding components 14 and to have larger contact area with air or other extraneous media, and then can improve to a certain extent the sounding effect of described sound-producing device 10.
Described sounding component 14 can be arranged on the surface of described supporting construction 16.Described sounding component 14 is a thermic sounding component, and can comprise at least one deck carbon nano-tube film, therefore described sounding component 14 is a thermic sounding film or a carbon nano-tube membrane structure.Described sounding component 14 can with the stayed surface almost parallel of described supporting construction 16.This carbon nano-tube film comprises a plurality of end to end carbon nano-tube.This carbon nano-tube film comprises the carbon nano-tube of a plurality of almost parallels, and carbon nano-tube is arranged of preferred orient in this carbon nano-tube film.This carbon nano-tube forms this carbon nano-tube film by the effect of Van der Waals force, and the bearing of trend of this carbon nano-tube is surperficial parallel with this carbon nano-tube film roughly.Carbon nano-tube in the described carbon nano-tube film can evenly distribute.Described carbon nano-tube film can obtain by directly pulling from a carbon nano pipe array.See also Fig. 3 and Fig. 4, further, described carbon nano-tube film comprises a plurality of carbon nano-tube fragments 143 that join end to end and align, and each carbon nano-tube fragment 143 has length about equally, and carbon nano-tube fragment 143 two ends interconnect by Van der Waals force.The carbon nano-tube 145 that this carbon nano-tube fragment 143 comprises a plurality of equal in length and is arranged parallel to each other.Above-mentioned carbon nano-tube film can be further processed through volatile organic solvent, and the surface volume ratio of the carbon nano-tube film after the processing reduces, and viscosity reduces, and its mechanical strength and toughness are enhanced.The thickness of described carbon nano-tube film is 0.5 nanometer～100 micron.The thickness of described sounding component 14 is 0.5 nanometer～1 millimeter.Further, described sounding component 14 can comprise at least carbon nano-tube film of two-layer laminate setting, combines closely by Van der Waals force between the adjacent carbon nano-tube film.The number of plies of the carbon nano-tube film in this sounding component 14 is not limit, and has an intersecting angle α between the orientation of the carbon nano-tube in the adjacent two layers carbon nano-tube film 145, and α specifically can prepare according to actual demand more than or equal to 0 degree and less than or equal to 90 degree.When described sounding component 14 comprises the multilayer carbon nanotube film, owing to combine closely by Van der Waals force between the adjacent two layers carbon nano-tube film, therefore described sounding component 14 has 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 described carbon nano tube structure, thereby makes carbon nano tube structure have specific shape.The unit are thermal capacitance of described sounding component 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 is less than 1.7 * 10
-6Every square centimeter of Kelvin of joule.Carbon nano-tube 145 in the described carbon nano-tube film can be 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.Length and the width of the described sounding component 14 that is comprised of one deck carbon nano-tube film are not at least limit, and specifically can prepare according to the actual requirements.In the embodiment of the invention, the length of described sounding component 14 is 3 centimetres, and width is 3 centimetres, and thickness is 50 nanometers.When the Thickness Ratio of this sounding component 14 hour, for example less than 10 microns, this sounding component has higher transparency, therefore adopt the sound-producing device 10 of this sounding component 14 to be transparent sound production device 10, can be directly installed on the surface of the display surface of various display unit, mobile phone display screen or oil painting as joint space-efficient transparent sound production device 10.
Because carbon nano-tube has great specific area, under the effect of Van der Waals force, this carbon nano-tube film itself has good adhesiveness, therefore when adopting this one deck carbon nano-tube film being made sounding component 14 at least, can directly be adhered fixed between described sounding component 14 and the described supporting construction 16.Further, between described sounding component 14 and described supporting construction 16, can further include a tack coat (not shown).Described tack coat can be arranged at the surface of described sounding component 14.Described tack coat can be fixed in described sounding component 14 surface of described supporting construction 16 better.The material of described tack coat can be insulating material, also can be the material with certain electric conductivity.In the present embodiment, described tack coat is one deck elargol.
Described the first electrode 142 and the second electrode 144 are electrically connected with described sounding component 14 respectively.Described the first electrode 142 and the second electrode 144 can further be electrically connected with described signal input apparatus 12 by a wire 149, are used for the signal of described signal input apparatus 12 is input to described sounding component 14.Described the first electrode 142 and the second electrode 144 are formed by electric conducting material, and its concrete shape structure is not limit, and can be one dimension, two dimension or three-dimensional structure.Particularly, described the first electrode 142 and the second electrode 144 may be selected to be stratiform, bar-shaped, block or other shape.The material of described the first electrode 142 and the second electrode 144 may be selected to be metal, conducting resinl, metallic carbon nanotubes, indium tin oxide (ITO) etc.Because described sounding component 14 is arranged on described supporting construction 16 surfaces, described the first electrode 142 and the second electrode 144 space sets are fixed on described sounding component 14 two ends or surface.The orientation of the carbon nano-tube in the setting of described the first electrode 142 and the second electrode 144 and the described sounding component 14 is relevant, and at least part of carbon nano-tube can be extended along the direction of described the first electrode 142 to second electrodes 144.In the embodiment of the invention, described the first electrode 142 and the second electrode 144 are bar-shaped metal electrode, described the first electrode 142 and the second electrode 144 intervals arrange and are fixed on described sounding component 14 two ends, and the whole carbon nano-tube in the described sounding component are extended along the direction of described the first electrode 142 to second electrodes 144.Because described the first electrode 142 and the second electrode 144 intervals arrange, can access certain resistance when described sounding component 14 is applied to sound-producing device 10 and avoid short circuit phenomenon to produce.Because carbon nano-tube has great specific area, under the effect of Van der Waals force, this carbon nano-tube film itself has good adhesiveness, therefore when adopting this one deck carbon nano-tube film being made sounding component 14 at least, can directly be adhered fixed between described the first electrode 142 and the second electrode 144 and the described sounding component 14, and formation electrically contacts preferably.
Further, can further include a conduction tack coat (not shown) between described the first electrode 142 and the second electrode 144 and the described sounding component 14.Described conduction tack coat can be arranged on the surface of described sounding component 14.Described conduction tack coat can also be fixed in described the first electrode 142 and the second electrode 144 on the surface of described sounding component 14 when realizing that the first electrode 142 and the second electrode 144 electrically contact with described sounding component 14 better.In the present embodiment, described conduction tack coat is one deck elargol.
Be appreciated that, first embodiment of the invention can further arrange a plurality of electrodes in described sounding component 14 surfaces, its quantity is not limit, only need guarantee that the equal interval of any two adjacent electrodes arranges, is electrically connected with described sounding component 14, and be electrically connected with the two ends of described signal input apparatus 12 respectively and get final product.
Be appreciated that because described sounding component 14 is arranged on described supporting construction 16 surfaces, therefore described the first electrode 142 and the second electrode 144 are selectable structure.Described signal input apparatus 12 can directly be electrically connected with described sounding component 14 by modes such as wire or contact conductors.Only need guarantee that described signal input apparatus 12 can input to the signal of telecommunication described sounding component 14 and get final product.Any mode that realizes being electrically connected between described signal input apparatus 12 and the described sounding component 14 is all within protection scope of the present invention.
The signal of described signal input apparatus 12 inputs comprises ac signal or audio electrical signal etc.Described signal input apparatus 12 is electrically connected with described the first electrode 142 and the second electrode 144 by wire 149, and by described the first electrode 142 and the second electrode 144 signal of telecommunication is input in the described sounding component 14.
Above-mentioned sound-producing device 10 in use, because the carbon nano-tube in the carbon nano-tube film joins end to end, evenly distribute, carbon nano-tube film has less unit are thermal capacitance and larger specific area, and behind input signal, variation according to signal strength signal intensity (such as current strength), the sounding component 14 that is comprised of one deck carbon nano-tube film at least is the medium of circumference equably, rapidly heating and cooling, produce periodic variations in temperature, and and surrounding medium carry out Rapid Thermal exchange, surrounding medium is expanded rapidly and contraction, send the appreciable sound of people's ear, and the frequency range of the sound that sends is wider, sounding effect is better.Therefore in the embodiment of the invention, the principle of sound of described sounding component 14 is the conversion of " electricity-Re-sound ", is with a wide range of applications.
It (is 1Hz～100kHz) that the audible frequency scope of described sound-producing device 10 is 1 hertz to 100,000 hertz.Fig. 5 is for adopting length and width to be carbon nano-tube film that 30 millimeters and carbon nano-tube join end to end and be arranged of preferred orient in the same direction as described sounding component 14, when input voltage is 50 volts, the frequency response characteristic of the described sound-producing device 10 that records when a microphone is placed on position apart from 5 centimetres of sounding components.As can be seen from Figure 5, the sound pressure level of described sound-producing device is greater than 50 decibels, even can reach 105 decibels, it (is 100Hz～100kHz) that the audible frequency scope is 100 hertz to 100,000 hertz, the distortion factor of described sound-producing device in 500 hertz～40,000 hertz frequency scopes is less than 3%, and described sound-producing device 10 has preferably sounding effect.In addition, sounding component 14 in the embodiment of the invention has preferably toughness and mechanical strength, described sounding component 14 can be made the sound-producing device 10 of various shape and size easily, but this sound-producing device 10 can be conveniently used in the product of various sounding, in the electronic applications such as sound equipment, mobile phone, MP3, MP4, TV, computer and other product.
See also Fig. 6, second embodiment of the invention provides a kind of sound-producing device 20, and this sound-producing device 20 comprises a signal input apparatus 22, a sounding component 24, a supporting construction 26, one first electrode 242, one second electrode 244, a third electrode 246 and one the 4th electrode 248.
Sound-producing device 20 in the second embodiment of the invention and the structure of the sound-producing device 10 among the first embodiment are basic identical, and difference is, the sounding component 24 in the second embodiment of the invention arranges around described supporting construction 26, forms an annular sounding component 24.The shape of described supporting construction 26 is not limit, and can be any stereochemical structure.Preferably, described supporting construction 26 is a cube, a cone or a cylinder.In the embodiment of the invention, described supporting construction 26 is a cylinder.Described the first electrode 242, the second electrode 244, third electrode 246 and the 4th electrode 248 are disposed on described sounding component 24 surfaces and are electrically connected with described sounding component 24.Any two adjacent electrodes are electrically connected with the two ends of described signal input apparatus 22 respectively, so that the sounding component 24 access input signals between adjacent electrode.Particularly, be electrically connected with an end of described signal input apparatus 22 after first non-conterminous two electrodes being connected with wire 249, two remaining electrodes are electrically connected with the other end of described signal input apparatus 22 after connecting with wire 249.In the embodiment of the invention, can first described the first electrode 242 be connected with third electrode and be electrically connected with an end of described signal input apparatus 22 after connecting with wire 249, again will described the second electrode 244 and 249 connections of the 4th electrode 248 usefulness wires are rear is electrically connected with the other end of described signal input apparatus 22.Above-mentioned connected mode can realize the parallel connection of the carbon nano-tube film between the adjacent electrode.Carbon nano-tube film after the parallel connection has less resistance, can reduce operating voltage.And above-mentioned connected mode can make described sounding component 24 to all directions homogeneous radiation, and intensity of phonation is enhanced, thereby realizes around sounding effect.
Be appreciated that the present invention can arrange a plurality of electrodes, its quantity is not limit, and only need guarantee that the equal interval of any two adjacent electrodes arranges, is electrically connected with described sounding component 24, and is electrically connected with the two ends of described signal input apparatus 22 respectively and gets final product.
See also Fig. 7, third embodiment of the invention provides a kind of sound-producing device 30, and this sound-producing device 30 comprises a signal input apparatus 32, a sounding component 34, a supporting construction 36, one first electrode 342, one second electrode 344.
Sound-producing device 30 in the third embodiment of the invention and the structure of the sound-producing device 10 among the first embodiment are basic identical, difference is, sounding component 34 parts in the third embodiment of the invention are arranged on described supporting construction 36 surfaces, thereby hold together the sound space on described sounding component 34 surfaces to forming one between the supporting construction 36.Formedly hold together the sound space and can be an enclosure space or an open space.Described supporting construction 36 is the cavity that a V-type or U-shaped structure or have narrow openings.When described supporting construction 36 is one when having the cavity of narrow openings, this sounding component 34 can tile and be fixedly installed on the opening of this cavity, thereby forms a helmholtz resonance chamber.The material of this supporting construction 36 is wooden, plastics, metal or glass etc.In the embodiment of the invention, described supporting construction 36 is a V-structure.Described sounding component 34 is fixed in supporting construction 36, and basically with respect to these supporting construction 36 unsettled settings.Described V-structure has the sidewall of two inclinations, and these two sidewalls have respectively a first end and one second end.The first end of described two sidewalls closely is connected to form this V-structure.Described sounding component 34 is arranged on the second end of described two sidewalls, namely extend to the second end of another sidewall from the second end of one of them sidewall, make the unsettled setting of described sounding component 34 parts, thereby hold together the sound space on described sounding component 34 surfaces to forming one between the supporting construction 36.Described sounding component 34 is arranged on the two ends of described V-structure, and namely the end from V-structure extends to the other end, makes the unsettled setting of described sounding component 34 parts, thereby holds together the sound space on described sounding component 34 surfaces to forming one between the supporting construction 36.Described the first electrode 342 and the second electrode 344 are disposed on described sounding component 34 surfaces.Described the first electrode 342 is electrically connected with the two ends of described signal input apparatus 32 after electrode 344 connects wire 349 with being connected.Described V-type supporting construction 36 can reflect the sound wave that described sounding component 34 is positioned at described supporting construction 36 1 sides, strengthens the sounding effect of described sound-producing device 30.
The sound-producing device that the embodiment of the invention provides has the following advantages: one, because the sounding component in the described sound-producing device only comprises carbon nano-tube film, need not other labyrinths such as magnet, therefore the structure of this sound-producing device is comparatively simple, be conducive to reduce the cost of this sound-producing device.Its two, this sound-producing device utilizes input signal to cause this sounding component variations in temperature, thereby its surrounding medium is expanded rapidly and shrinks, and then sends sound wave, need not vibrating diaphragm, therefore and the sound-producing device that forms of this sounding component can under the condition without magnetic, work.They are three years old, because carbon nano-tube film has less unit are thermal capacitance and large specific area, and the carbon nano-tube in the carbon nano-tube film is arranged of preferred orient and the orientation of part carbon nano-tube is extended along the direction from described the first electrode to the second electrode, behind input signal, variation according to signal strength signal intensity (such as current strength), the sounding component that is comprised of one deck carbon nano-tube film at least is the medium of circumference equably, rapidly heating and cooling, produce periodic variations in temperature, and and surrounding medium carry out Rapid Thermal exchange, surrounding medium is expanded rapidly and contraction, send the appreciable sound of people's ear, and the frequency range of the sound that sends is wider, sounding effect is better.In addition, when the Thickness Ratio of this sounding component hour, this sounding component has higher transparency, therefore formed sound-producing device is the transparent sound production device, can be directly installed on the surface of the display surface of various display unit, mobile phone display screen or oil painting as joint space-efficient transparent sound production device.They are four years old, because carbon nano-tube has preferably mechanical strength and toughness, the carbon nano-tube film that then is comprised of a plurality of end to end carbon nano-tube has preferably mechanical strength and toughness, durability is better, thereby be conducive to prepare the various shapes that formed by one deck carbon nano-tube film at least, the sound-producing device of size, and then be conveniently used in various fields.They are five years old, because carbon nano-tube film is for to pull acquisition from a direct carbon nano pipe array, it has great specific area, under the effect of Van der Waals force, described carbon nano-tube film has preferably viscosity, thereby is conducive to prepare large-area sounding component and sound-producing device.They are six years old, when described supporting construction be a V-type, when U-shaped structure or has the cavity of narrow openings, described sounding component partly is arranged at described supporting construction surface, form one and hold together the sound space, described supporting construction can reflect the sound wave that described sounding component sends, and strengthens the sounding effect of described sound-producing device.
In addition, those skilled in the art also can do other variations 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 (25)
1. sound-producing device, it comprises:
One sounding component; And
One signal input apparatus is used for output electrical signals to this sounding component;
It is characterized in that, this sound-producing device comprises a supporting construction, described sounding component is at least part of by this support construction supports, this sounding component comprises at least one deck carbon nano-tube film, this carbon nano-tube film comprises a plurality of end to end carbon nano-tube, and this carbon nano-tube film sends corresponding sound wave for the signal of telecommunication that receives described signal input apparatus output.
2. sound-producing device as claimed in claim 1 is characterized in that, the thickness of described sounding component is 0.5 nanometer～1 millimeter.
3. sound-producing device as claimed in claim 1 is characterized in that, the unit are thermal capacitance of described sounding component is less than 2 * 10
-4Every square centimeter of Kelvin of joule.
4. sound-producing device as claimed in claim 1 is characterized in that, the unit are thermal capacitance of described sounding component is less than 1.7 * 10
-6Every square centimeter of Kelvin of joule.
5. sound-producing device as claimed in claim 1 is characterized in that, described sounding component is with the cyclic variation of input signal, its ambient density generating period variation, and then send sound wave.
6. sound-producing device as claimed in claim 1 is characterized in that, the audible frequency of described sound-producing device is 1 hertz～100,000 hertz.
7. sound-producing device as claimed in claim 6 is characterized in that, the distortion factor of described sound-producing device in 500 hertz～40,000 hertz frequency scopes is less than 3%.
8. sound-producing device as claimed in claim 1 is characterized in that, the sound pressure level of described sound-producing device is greater than 50 decibels.
9. sound-producing device as claimed in claim 1 is characterized in that, described carbon nano-tube is arranged of preferred orient in carbon nano-tube film substantially in the same direction.
10. sound-producing device as claimed in claim 1, it is characterized in that, described carbon nano-tube film further comprises a plurality of end to end carbon nano-tube fragments, length and each carbon nano-tube fragment that each carbon nano-tube fragment has about equally are made of a plurality of carbon nano-tube that are parallel to each other, and carbon nano-tube fragment two ends interconnect by Van der Waals force.
11. sound-producing device as claimed in claim 1 is characterized in that, described sounding component comprises at least carbon nano-tube film of two-layer laminate setting, and combines closely by Van der Waals force between the adjacent two layers carbon nano-tube film.
12. sound-producing device as claimed in claim 1 is characterized in that, described sounding component directly arranges and fits in the surface of described supporting construction.
13. sound-producing device as claimed in claim 1 is characterized in that, described sounding component is by at least part of unsettled setting of described supporting construction.
14. sound-producing device as claimed in claim 13, it is characterized in that, described supporting construction is the cavity that a V-type, U-shaped structure or have narrow openings, and described sounding component holds together sound space at described sounding component to forming one between the supporting construction by the unsettled setting of this supporting construction part.
15. sound-producing device as claimed in claim 1 is characterized in that, described supporting construction is a stereochemical structure, and described sounding component is around described supporting construction setting.
16. sound-producing device as claimed in claim 1 is characterized in that, the material of described supporting construction is diamond, glass, quartz, plastics or resin.
17. sound-producing device as claimed in claim 1 is characterized in that, described sound-producing device further comprises at least two electrodes, this at least two electrode gap and be electrically connected with described sounding component.
18. sound-producing device as claimed in claim 17 is characterized in that, described sound-producing device comprises two electrodes, and the direction of at least part of carbon nano-tube along one of them electrode to another electrode extended in the described sounding component.
19. sound-producing device as claimed in claim 17 is characterized in that, described at least two electrodes further are electrically connected with the two ends of described signal input apparatus by wire.
20. sound-producing device as claimed in claim 1, it is characterized in that, described sound-producing device comprises a plurality of electrodes, this a plurality of electrode gap settings and all being electrically connected with described sounding component, and any two adjacent electrodes are electrically connected with the two ends of described signal input apparatus respectively in these a plurality of electrodes.
21. sound-producing device as claimed in claim 17 is characterized in that, the material of described electrode is metal, conducting resinl, metallic carbon nanotubes or indium tin oxide.
22. sound-producing device as claimed in claim 17 is characterized in that, described sound-producing device comprises that further a conduction tack coat is arranged between described two electrodes and the sounding component at least.
23. sound-producing device as claimed in claim 1 is characterized in that, the signal of described signal input apparatus input comprises ac signal or audio electrical signal.
24. a sound-producing device, it comprises:
One signal input apparatus;
At least two electrodes, this at least two electrode gap setting; And
One thermic sounding film, this thermic sounding film receive the signal of telecommunication of described signal input apparatus output at least by described two electrodes;
It is characterized in that, this sound-producing device comprises a supporting construction, this supporting construction has a stayed surface, the at least part of support construction supports of passing through of described thermic sounding film, and with this stayed surface almost parallel, this thermic sounding film comprises at least one deck carbon nano-tube film, and this carbon nano-tube film comprises a plurality of end to end carbon nano-tube, and this carbon nano-tube film sends corresponding sound wave by the signal of telecommunication that described at least two electrodes receive described signal input apparatus output.
25. a thermo-acoustic device is characterized in that, comprising:
One carbon nano-tube membrane structure comprises at least one deck carbon nano-tube film, and this carbon nano-tube film comprises the carbon nano-tube that a plurality of head and the tail link to each other by Van der Waals force;
One supporting construction, this carbon nano-tube membrane structure is fixed in supporting construction, and this carbon nano-tube membrane structure is basically with respect to the unsettled setting of this supporting construction; And
One signal input apparatus is used for output electrical signals to this carbon nano-tube membrane structure; This carbon nano-tube membrane structure is sent corresponding sound wave for the signal of telecommunication that receives described signal input apparatus output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910139278 CN101610444B (en) | 2008-06-18 | 2009-04-22 | Sounding device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810067906.X | 2008-06-18 | ||
| CN200810067906 | 2008-06-18 | ||
| CN 200910139278 CN101610444B (en) | 2008-06-18 | 2009-04-22 | Sounding device |
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| CN101610444B true CN101610444B (en) | 2013-01-09 |
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| CN 200910139278 Active CN101610444B (en) | 2008-06-18 | 2009-04-22 | Sounding device |
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| JP (1) | JP5107970B2 (en) |
| CN (1) | CN101610444B (en) |
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| EP2138998B1 (en) * | 2008-06-04 | 2019-11-06 | Tsing Hua University | Thermoacoustic device comprising a carbon nanotube structure |
| CN101841759A (en) * | 2010-05-10 | 2010-09-22 | 北京富纳特创新科技有限公司 | Thermo-acoustic device |
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| CN2425468Y (en) * | 2000-06-09 | 2001-03-28 | 东莞市以态电子有限公司 | Plate speaker |
| CN1821048A (en) * | 2005-02-18 | 2006-08-23 | 中国科学院理化技术研究所 | Micro/nano thermoacoustic vibration exciter based on thermoacoustic conversion |
| WO2007043837A1 (en) * | 2005-10-14 | 2007-04-19 | Kh Chemicals Co., Ltd. | Acoustic diaphragm and speakers having the same |
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| JP3798302B2 (en) * | 2001-11-20 | 2006-07-19 | 独立行政法人科学技術振興機構 | Thermally induced pressure wave generator |
| JP2005189322A (en) * | 2003-12-24 | 2005-07-14 | Sharp Corp | Image forming apparatus |
| JP2005333601A (en) * | 2004-05-20 | 2005-12-02 | Norimoto Sato | Negative feedback amplifier driving loudspeaker unit |
| EP1916870B1 (en) * | 2005-10-26 | 2010-11-24 | Panasonic Electric Works Co., Ltd. | Pressure wave generator and production method therefor |
| WO2007099975A1 (en) * | 2006-02-28 | 2007-09-07 | Toyo Boseki Kabushiki Kaisha | Carbon nanotube assembly, carbon nanotube fiber and process for producing carbon nanotube fiber |
| WO2007110899A1 (en) * | 2006-03-24 | 2007-10-04 | Fujitsu Limited | Device structure of carbon fiber and process for producing the same |
| CN101600141B (en) * | 2008-06-04 | 2015-03-11 | 清华大学 | Sound production device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2425468Y (en) * | 2000-06-09 | 2001-03-28 | 东莞市以态电子有限公司 | Plate speaker |
| CN1821048A (en) * | 2005-02-18 | 2006-08-23 | 中国科学院理化技术研究所 | Micro/nano thermoacoustic vibration exciter based on thermoacoustic conversion |
| WO2007043837A1 (en) * | 2005-10-14 | 2007-04-19 | Kh Chemicals Co., Ltd. | Acoustic diaphragm and speakers having the same |
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| Publication number | Publication date |
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| CN101610444A (en) | 2009-12-23 |
| JP5107970B2 (en) | 2012-12-26 |
| JP2010004536A (en) | 2010-01-07 |
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