CN107820170A - A kind of ultra-thin loudspeaker structure and mobile terminal - Google Patents
A kind of ultra-thin loudspeaker structure and mobile terminal Download PDFInfo
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- CN107820170A CN107820170A CN201711021709.XA CN201711021709A CN107820170A CN 107820170 A CN107820170 A CN 107820170A CN 201711021709 A CN201711021709 A CN 201711021709A CN 107820170 A CN107820170 A CN 107820170A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
The invention discloses a kind of ultra-thin loudspeaker structure and mobile terminal, the ultra-thin loudspeaker structure includes：Frame, ring；The ring is fixed on the frame, and the front of the ring sets capacitance variations pole, and the back side of the ring sets capacitance cathode or electric capacity negative pole, the capacitance variations pole to be fixed with the ring, and capacitance cathode or the electric capacity negative pole is fixed with frame.Height reduction to 1.3mm can be provided more spaces by the ultrathin loudspeaker that the present invention realizes for the thickness for further reducing mobile terminal.
Description
Technical field
The present invention relates to technical field of mobile terminals, more particularly to a kind of ultra-thin loudspeaker structure and mobile terminal.
Background technology
Mobile phone speaker, it is a kind of electro-acoustic element for converting electrical energy into acoustic energy, is exactly briefly acoustical generator.
The species of loudspeaker is a lot, although their working method is different, final pushed away by producing mechanical oscillation
Air around dynamic, air dielectric is set to produce fluctuation so as to realize the conversion of " electricity-power-sound ".
The species of loudspeaker is a lot, by its transduction principle can be divided into electrodynamic type (i.e. moving-coil type), electrostatic (i.e. condenser type),
Electromagnetic type (i.e. reed), piezoelectric type (i.e. crystal formula) etc. are several, and latter two is used in rural wired broadcast network；By frequency model
Woofer, mid frequency ludspeaker, tweeter can be divided into by enclosing, and these are often used in audio amplifier as combination loudspeaker.
By transducing mechanism and structure transfer ring type (electrodynamic type), condenser type (electrostatic), piezoelectric type (crystal or ceramics), electricity
Magnetic-type (compressed spring type), the gentle loudspeaker of electric ion type etc., dynamic speaker have good electroacoustic performance, sound construction, into
This low advantage, is widely used；
By acoustic radiation material separation benzvalene form, horn type, diaphragm type；By cone shape cyclotomy shape, ellipse, dual cone and rubber
Skin ring；Divide bass, middle pitch, high pitch by working frequency, some is also divided into that recorder is special, television set is special, common and high guarantor
True loudspeaker etc.；Divide Low ESR and high impedance by voice coil loudspeaker voice coil impedance；By effect point straight spoke and ambient sound etc..
Loudspeaker is divided into boombox and external speaker, and external speaker is general signified audio amplifier.It is built-in to raise
Sound device refers to that MP4 players have built-in loudspeaker, and such user can also can not only be raised by earphone jack by built-in
Sound device listens to the sound that MP4 players are sent.MP4 players with boombox, external speaker can not had to, may be used yet
Inconvenience caused by earphone is worn for a long time to avoid.
(1) woofer
For a variety of audio amplifiers, to the quality factor of woofer --- the requirement of Q0 values is different.To closed box
For phase inverting box, Q0 values are best typically between 0.3~0.6.In general, the bore of woofer, magnet and voice coil loudspeaker voice coil
Diameter is bigger, and low frequency reproduction performance, transient response are better, and sensitivity is also higher.The structure type of bass unit is mostly to bore
Benzvalene form, also have a small amount of to be flat.
The vibrating diaphragm species of bass unit is various, have aluminium alloy vibrating diaphragm, almag vibrating diaphragm, ceramic vibrating diaphragm, carbon fiber vibrating diaphragm,
Bulletproof cloth vibrating diaphragm, glass fibre vibrating diaphragm, propylene vibrating diaphragm, paper vibrating diaphragm etc..Using aluminium alloy vibrating diaphragm, the bass of glass fibre vibrating diaphragm
The general bore of unit is smaller, bears that power is bigger, and uses the bass unit replay sound for strengthening cone, glass fibre vibrating diaphragm
Tone color when happy is more accurate, and whole machine balancing degree is pretty good.
The quality factor of loudspeaker unit are designs and and make a critically important parameter have to be understood that before audio amplifier.
It represents that the acuity at impedance curve impedance peak at resonant frequency, it is one on the impedance characteristic of loudspeaker unit
The damping state of speaker vibration system is reflected in fixed degree, abbreviation Q0 values, the quality factor of loudspeaker unit are higher, humorous
Vibration frequency is just more difficult to control.The low frequency characteristic of loudspeaker generally determines by the figure of merit value and resonant frequency of loudspeaker unit,
Wherein the size of quality factor is relevant with the acoustic pressure that loudspeaker unit exports at resonant frequency.Loudspeaker is defeated when Q0 values are too low
Just rapidly decline when going out acoustic pressure also without at F0, loudspeaker is in overdamping state, causes low cut excessive.Q0 values
Loudspeaker is in underdamping state when high, and low frequency obtains excessive reinforcement.Q0 values are bigger, and peak value is steeper.Therefore we say loudspeaker
Quality factor i.e. can not it is too high can not be too low, generally we take its critical damping value Q0 to be equal to 0.5-0.7 as optimal
Span.
(2) mid frequency ludspeaker
In general, as long as mid frequency ludspeaker frequency response curve is flat, effective Hz-KHz is carried on a shoulder pole in systems more than it
The width of negative sound reproduction frequency band, impedance are consistent with sensitivity and low frequency cell.Sometimes the power capacity of middle pitch is inadequate, also may be used
Select sensitivity higher, and impedance is higher than the middle pitch of bass unit, so as to which that reduces alto units actually enters power.Middle pitch list
Member typically has two kinds of cone basin and top dome.Only its size and bear power it is all bigger than voice unit and be suitable for play middle pitch
Frequency.The vibrating diaphragm of alto units also has a small amount of alloy top dome vibrating diaphragm once in a while based on the flexible material such as cone and thin,tough silk film.
(3) tweeter
Voice unit is as its name suggests to play back the loudspeaker unit of high-frequency sound.Mainly the number of having solves its structure type
Several major classes such as formula, cone basin formula, ball top type and aluminium band type.
With mobile terminal, the portability of linking Internet mouth product, the requirement of ultra-thin and ultra-light also more and more higher is existing to raise
Sound device highly constrains an important factor for complete machine thickness, and existing loudspeaker solution has the disadvantages that：
1. the height of existing loudspeaker is not less than 3mm, the complete machine thickness of mobile terminal is seriously limited；
2. because existing rare earth cost is high, cause the cost of existing loudspeaker high；
3. existing loudspeaker discontinuity equalization, easily produces resonance.
Based on problem above, the present invention proposes improvement project.
The content of the invention
It is a primary object of the present invention to propose a kind of ultra-thin loudspeaker structure and mobile terminal, it is intended to solve existing raise
Sound device structural thickness is too thick, so that the mobile terminal residing for loudspeaker can not further reduce thickness.
To achieve the above object, a kind of ultra-thin loudspeaker structure provided by the invention, comprising：Frame, ring；The ring
Be fixed on the frame, the front of the ring sets capacitance variations pole, the back side of the ring set capacitance cathode or
Electric capacity negative pole, the capacitance variations pole are fixed with the ring, and capacitance cathode or the electric capacity negative pole is fixed with frame.
The frame is a rectangular metal ring, and the height of the frame is less than 1.5mm, described in the inner ring of the frame is fixed
Ring.
At least one annular groove, the centrally disposed vibrating diaphragm of the ring are set on the ring.
The periphery of the ring is at least one circular groove structure, and center is film.
It is mutually exclusive with the capacitance cathode that is arranged at the ring back side when capacitance variations pole is charged as positive charge, electric capacity
Change extremely motion upwards, promotes air to produce acoustic pressure, sends sound.
When the capacitance variations pole charging positive charge tapers into, repulsive force tapers into, when capacitance variations are extremely not charged
During lotus, capacitance variations pole is returned to nature position.
When capacitance variations pole is charged as negative electrical charge, capacitance variations pole is inhaled with being arranged at the capacitance cathode at the ring back side
The effect of gravitation moves closer to, and promotes air to produce acoustic pressure.
When capacitance variations pole receives sinusoidal signal, capacitance variations pole produces sinusoidal vibration, produces sinusoidal wave acoustic signals.
The capacitance variations pole, capacitance cathode or electric capacity negative pole are the membrane structure that thickness is 0.2mm.
In addition, to achieve the above object, the present invention also proposes a kind of mobile terminal, and the mobile terminal is provided with above-mentioned
Anticipate a kind of ultra-thin loudspeaker structure.
Ultra-thin loudspeaker structure and mobile terminal proposed by the present invention, by being improved the structure of loudspeaker, make to raise
Sound device thickness can be reduced to 1.2mm, be greatly reduced relative to the thickness of existing loudspeaker, can be the thickness for reducing mobile terminal
Degree provides more spaces.
Brief description of the drawings
Fig. 1 is the hardware architecture diagram for the mobile terminal for realizing each embodiment of the present invention；
Fig. 2 is the wireless communication system schematic diagram of mobile terminal as shown in Figure 1；
Fig. 3 is the loadspeaker structure front schematic view that various embodiments of the present invention provide；
Fig. 4 is the loadspeaker structure profile that various embodiments of the present invention provide.
Fig. 5 is the operation principle schematic diagram of electrostatic loudspeaker in the prior art.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
In follow-up description, the suffix using such as " module ", " part " or " unit " for representing element is only
Be advantageous to the explanation of the present invention, itself there is no a specific meaning.Therefore, " module ", " part " or " unit " can mix
Ground uses.
Terminal can be implemented in a variety of manners.For example, the terminal described in the present invention can include such as mobile phone, flat board
Computer, notebook computer, palm PC, personal digital assistant (Personal Digital Assistant, PDA), portable
Media player (Portable MediaPlayer, PMP), guider, wearable device, Intelligent bracelet, pedometer etc. move
Dynamic terminal, and the fixed terminal such as digital TV, desktop computer.
It will be illustrated in subsequent descriptions by taking mobile terminal as an example, it will be appreciated by those skilled in the art that except special
Outside element for moving purpose, construction according to the embodiment of the present invention can also apply to the terminal of fixed type.
Referring to Fig. 1, its hardware architecture diagram for a kind of mobile terminal of each embodiment of the realization present invention, the shifting
Dynamic terminal 100 can include：RF (Radio Frequency, radio frequency) unit 101, WiFi module 102, audio output unit
103rd, A/V (audio/video) input block 104, sensor 105, display unit 106, user input unit 107, interface unit
108th, the part such as memory 109, processor 110 and power supply 111.It will be understood by those skilled in the art that shown in Fig. 1
Mobile terminal structure does not form the restriction to mobile terminal, and mobile terminal can be included than illustrating more or less parts,
Either combine some parts or different parts arrangement.
The all parts of mobile terminal are specifically introduced with reference to Fig. 1：
Radio frequency unit 101 can be used for receiving and sending messages or communication process in, the reception and transmission of signal, specifically, by base station
Downlink information receive after, handled to processor 110；In addition, up data are sent to base station.Generally, radio frequency unit 101
Including but not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier, duplexer etc..In addition, penetrate
Frequency unit 101 can also be communicated by radio communication with network and other equipment.Above-mentioned radio communication can use any communication
Standard or agreement, including but not limited to GSM (Global System ofMobile communication, global system for mobile telecommunications
System), GPRS (General Packet Radio Service, general packet radio service), CDMA2000 (Code
DivisionMultiple Access 2000, CDMA 2000), WCDMA (Wideband Code Division
Multiple Access, WCDMA), TD-SCDMA (Time Division-Synchronous Code
DivisionMultiple Access, TD SDMA), FDD-LTE (FrequencyDivision
Duplexing-Long Term Evolution, FDD Long Term Evolution) and TDD-LTE (Time Division
Duplexing-Long Term Evolution, time division duplex Long Term Evolution) etc..
WiFi belongs to short range wireless transmission technology, and mobile terminal can help user to receive and dispatch electricity by WiFi module 102
Sub- mail, browse webpage and access streaming video etc., it has provided the user wireless broadband internet and accessed.Although Fig. 1 shows
Go out WiFi module 102, but it is understood that, it is simultaneously not belonging to must be configured into for mobile terminal, completely can be according to need
To be omitted in the essential scope for do not change invention.
Audio output unit 103 can be in call signal reception pattern, call mode, record mould in mobile terminal 100
When under the isotypes such as formula, speech recognition mode, broadcast reception mode, by radio frequency unit 101 or WiFi module 102 it is receiving or
It is sound that the voice data stored in memory 109, which is converted into audio signal and exported,.Moreover, audio output unit 103
The audio output related to the specific function that mobile terminal 100 performs can also be provided (for example, call signal receives sound, disappeared
Breath receives sound etc.).Audio output unit 103 can include loudspeaker, buzzer etc..
A/V input blocks 104 are used to receive audio or video signal.A/V input blocks 104 can include graphics processor
(Graphics Processing Unit, GPU) 1041 and microphone 1042, graphics processor 1041 is in video acquisition mode
Or the static images or the view data of video obtained in image capture mode by image capture apparatus (such as camera) are carried out
Reason.Picture frame after processing may be displayed on display unit 106.Picture frame after the processing of graphics processor 1041 can be deposited
Storage is transmitted in memory 109 (or other storage mediums) or via radio frequency unit 101 or WiFi module 102.Mike
Wind 1042 can connect in telephone calling model, logging mode, speech recognition mode etc. operational mode via microphone 1042
Quiet down sound (voice data), and can be voice data by such acoustic processing.Audio (voice) data after processing can
To be converted to the form output that mobile communication base station can be sent to via radio frequency unit 101 in the case of telephone calling model.
Microphone 1042 can implement various types of noises and eliminate (or suppression) algorithm to eliminate (or suppression) in reception and send sound
Caused noise or interference during frequency signal.
Mobile terminal 100 also includes at least one sensor 105, such as optical sensor, motion sensor and other biographies
Sensor.Specifically, optical sensor includes ambient light sensor and proximity transducer, wherein, ambient light sensor can be according to environment
The light and shade of light adjusts the brightness of display panel 1061, and proximity transducer can close when mobile terminal 100 is moved in one's ear
Display panel 1061 and/or backlight.As one kind of motion sensor, accelerometer sensor can detect in all directions (general
For three axles) size of acceleration, size and the direction of gravity are can detect that when static, the application available for identification mobile phone posture
(such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, percussion) etc.；
The fingerprint sensor that can also configure as mobile phone, pressure sensor, iris sensor, molecule sensor, gyroscope, barometer,
The other sensors such as hygrometer, thermometer, infrared ray sensor, will not be repeated here.
Display unit 106 is used for the information for showing the information inputted by user or being supplied to user.Display unit 106 can wrap
Display panel 1061 is included, liquid crystal display (Liquid Crystal Display, LCD), Organic Light Emitting Diode can be used
Forms such as (Organic Light-Emitting Diode, OLED) configures display panel 1061.
User input unit 107 can be used for the numeral or character information for receiving input, and produce the use with mobile terminal
The key signals input that family is set and function control is relevant.Specifically, user input unit 107 may include contact panel 1071 with
And other input equipments 1072.Contact panel 1071, also referred to as touch-screen, collect touch operation of the user on or near it
(for example user uses any suitable objects or annex such as finger, stylus on contact panel 1071 or in contact panel 1071
Neighbouring operation), and corresponding attachment means are driven according to formula set in advance.Contact panel 1071 may include touch detection
Two parts of device and touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect touch operation band
The signal come, transmits a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and by it
Contact coordinate is converted into, then gives processor 110, and the order sent of reception processing device 110 and can be performed.In addition, can
To realize contact panel 1071 using polytypes such as resistance-type, condenser type, infrared ray and surface acoustic waves.Except contact panel
1071, user input unit 107 can also include other input equipments 1072.Specifically, other input equipments 1072 can wrap
Include but be not limited to physical keyboard, in function key (such as volume control button, switch key etc.), trace ball, mouse, action bars etc.
One or more, do not limit herein specifically.
Further, contact panel 1071 can cover display panel 1061, detect thereon when contact panel 1071 or
After neighbouring touch operation, processor 110 is sent to determine the type of touch event, is followed by subsequent processing device 110 according to touch thing
The type of part provides corresponding visual output on display panel 1061.Although in Fig. 1, contact panel 1071 and display panel
1061 be the part independent as two to realize the input of mobile terminal and output function, but in certain embodiments, can
Input and the output function of mobile terminal are realized so that contact panel 1071 and display panel 1061 is integrated, is not done herein specifically
Limit.
Interface unit 108 is connected the interface that can pass through as at least one external device (ED) with mobile terminal 100.For example,
External device (ED) can include wired or wireless head-band earphone port, external power source (or battery charger) port, wired or nothing
Line FPDP, memory card port, the port for connecting the device with identification module, audio input/output (I/O) end
Mouth, video i/o port, ear port etc..Interface unit 108 can be used for receiving the input from external device (ED) (for example, number
It is believed that breath, electric power etc.) and the input received is transferred to one or more elements in mobile terminal 100 or can be with
For transmitting data between mobile terminal 100 and external device (ED).
Memory 109 can be used for storage software program and various data.Memory 109 can mainly include storing program area
And storage data field, wherein, storing program area can storage program area, application program (such as the sound needed at least one function
Sound playing function, image player function etc.) etc.；Storage data field can store according to mobile phone use created data (such as
Voice data, phone directory etc.) etc..In addition, memory 109 can include high-speed random access memory, can also include non-easy
The property lost memory, a for example, at least disk memory, flush memory device or other volatile solid-state parts.
Processor 110 is the control centre of mobile terminal, utilizes each of various interfaces and the whole mobile terminal of connection
Individual part, by running or performing the software program and/or module that are stored in memory 109, and call and be stored in storage
Data in device 109, the various functions and processing data of mobile terminal are performed, so as to carry out integral monitoring to mobile terminal.Place
Reason device 110 may include one or more processing units；Preferably, processor 110 can integrate application processor and modulatedemodulate is mediated
Device is managed, wherein, application processor mainly handles operating system, user interface and application program etc., and modem processor is main
Handle radio communication.It is understood that above-mentioned modem processor can not also be integrated into processor 110.
Mobile terminal 100 can also include the power supply 111 (such as battery) to all parts power supply, it is preferred that power supply 111
Can be logically contiguous by power-supply management system and processor 110, so as to realize management charging by power-supply management system, put
The function such as electricity and power managed.
Although Fig. 1 is not shown, mobile terminal 100 can also will not be repeated here including bluetooth module etc..
For the ease of understanding the embodiment of the present invention, the communications network system being based on below to the mobile terminal of the present invention enters
Row description.
Referring to Fig. 2, Fig. 2 is a kind of communications network system Organization Chart provided in an embodiment of the present invention, the communication network system
Unite as the LTE system of universal mobile communications technology, the UE that the LTE system includes communicating connection successively (User Equipment, is used
Family equipment) 201, E-UTRAN (Evolved UMTS Terrestrial Radio Access Network, evolved UMTS lands
Ground wireless access network) 202, EPC (Evolved Packet Core, evolved packet-based core networks) 203 and operator IP operation
204。
Specifically, UE201 can be above-mentioned terminal 100, and here is omitted.
E-UTRAN202 includes eNodeB2021 and other eNodeB2022 etc..Wherein, eNodeB2021 can be by returning
Journey (backhaul) (such as X2 interface) is connected with other eNodeB2022, and eNodeB2021 is connected to EPC203,
ENodeB2021 can provide UE201 to EPC203 access.
EPC203 can include MME (Mobility Management Entity, mobility management entity) 2031, HSS
(Home Subscriber Server, home subscriber server) 2032, other MME2033, SGW (Serving GateWay,
Gateway) 2034, PGW (PDN Gate Way, grouped data network gateway) 2035 and PCRF (Policy and
Charging Rules Function, policy and rate functional entity) 2036 etc..Wherein, MME2031 be processing UE201 and
The control node of signaling between EPC203, there is provided carrying and connection management.HSS2032 is all to manage for providing some registers
Such as the function of attaching position register (not shown) etc, and preserve some and used about service features, data rate etc.
The special information in family.All customer data can be transmitted by SGW2034, and PGW2035 can provide UE 201 IP
Address is distributed and other functions, and PCRF2036 is strategy and the charging control strategic decision-making of business data flow and IP bearing resources
Point, it selects and provided available strategy and charging control decision-making with charge execution function unit (not shown) for strategy.
IP operation 204 can include internet, Intranet, IMS (IP Multimedia Subsystem, IP multimedia
System) or other IP operations etc..
Although above-mentioned be described by taking LTE system as an example, those skilled in the art it is to be understood that the present invention not only
Suitable for LTE system, be readily applicable to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA with
And following new network system etc., do not limit herein.
Based on above-mentioned mobile terminal hardware configuration and communications network system, each embodiment of the inventive method is proposed.
Embodiment one
First embodiment of the invention provides a kind of ultra-thin loudspeaker structure, as shown in figure 3, comprising：Frame 1, ring 2；Institute
Ring 2 is stated to be fixed on the frame 1, as shown in figure 4, the front of the ring 2 sets capacitance variations pole 3, the ring 2
The back side sets capacitance cathode 4, and the capacitance variations pole 3 is fixed with the ring 2, and the capacitance cathode 4 is fixed with frame 1.Institute
State capacitance variations pole 3, capacitance cathode 4 is membrane structure that thickness is 0.2mm.
Specifically, the frame 1 is a rectangular metal ring, the supporting construction as loudspeaker.The shape of frame determines to raise
The net shape of sound device.In the present embodiment, frame is straight-flanked ring, and material is metal, such as iron hoop, aluminum alloy ring.Certainly, frame
Can also be other suitable shapes such as circle, ellipse.
The inner ring of the frame 1 fixes the ring 2.At least one annular groove, the ring are set on the ring 2
Centrally disposed vibrating diaphragm, the annular groove on the ring 2.
Ring is indispensable in loudspeaker, vibration of membrane that its most basic effect is support and holding is shaken, makes to shake
Film axially movable, and can be unable to transverse movement, and common ring material has fiber+composite coating material, rubber, Foamex
With the material such as foam.Vibrating diaphragm：When additional audio signal, diaphragm oscillations, vibrating diaphragm then promotes air, produces sound wave.Vibrating diaphragm is shaking
When dynamic frequency is higher, it may appear that diaphagras, increase fold can change the state of diaphagras in vibrating diaphragm tapered slope, such as
Fruit is designed to work as, and can improve the high frequency characteristics of unit, can also increase shake film strength and damping.Good vibrating diaphragm should be able to allow
Vibrating diaphragm has larger pliable upwards in vibrating shaft, and has stronger rigidity in the horizontal.In oscillating region as big as possible
It is interior to make vibration of membrane of shaking more linear.And it should not have obvious resonance and anti-phase vibration, quality also to be tried one's best light.
Loudspeaker is a kind of energy transducer for electric signal being changed into acoustical signal, the shadow of the performance quality of loudspeaker to tonequality
Sound is very big.The species of loudspeaker is various, and price differs greatly.Audio electric energy makes it by electromagnetism, piezoelectricity or electrostatic effect
Cone or diaphragm vibration simultaneously produce resonance (sympathetic response) with the air of surrounding and send sound.
The present invention ultrathin loudspeaker when in use, if capacitance variations pole 3 is charged as positive charge, capacitance variations pole 3
Mutually exclusive with the capacitance cathode 4 that is arranged at the ring back side, capacitance variations pole 3 is moved upwards, is promoted air to produce acoustic pressure, is sent
Sound.Acoustic pressure is exactly overbottom pressure of the atmospheric pressure by caused change, as atmospheric pressure after acoustic perturbation, and it is equivalent in air
Pressure change caused by one acoustic perturbation of superposition on pressure.Because the measurement of acoustic pressure is easier to realize, pass through acoustic pressure
Measurement can also try to achieve other physical quantitys such as particle velocity indirectly, so commonly using this physical quantity in acoustics to describe sound wave.
When the charging of capacitance variations pole 3 positive charge tapers into, the repulsion between capacitance variations pole 3 and capacitance cathode 4
Power tapers into, and when 3 neutral of capacitance variations pole, is returned to nature position.
When capacitance variations pole 3 is charged as negative electrical charge, capacitance variations pole 3 and be arranged at the capacitance cathode 4 at the ring back side by
Effect to attraction moves closer to, and promotes air to produce acoustic pressure.
When the electric signal that capacitance variations pole receives is sinusoidal signal, capacitance variations pole produces sinusoidal vibration, produces just
String wave acoustic signals.
On the whole, ultrathin loudspeaker of the invention belongs to electrostatic loudspeaker, is quiet on capacitor plate using being added to
Electric power and the loudspeaker to work, see with regard to its structure, because both positive and negative polarity forms capacitor-like in opposite directions, so also known as condenser loudspeaker.
In the prior art electrostatic loudspeaker operation principle as shown in figure 5, electrostatic loudspeaker have two pieces of thickness and hard material as fixing
Pole plate, it is possible thereby to which through sound, middle a piece of pole plate then makees vibrating diaphragm (such as aluminium film) with thin and light material on pole plate.By vibrating diaphragm
Surrounding is fixed, tenses and distance suitable with fixed pole holding, on big vibrating diaphragm, will not also be collided with fixed pole.In electrostatic
An original DC voltage (referred to as biasing) between the electrode of loudspeaker two.If the audio-frequency electric exported between two electrodes plus by amplifier
Pressure, overlaps with original output voltage, forms the pulsating volage of alternation, this pulsating volage results from two clearance between poles attractions
Strong and weak change, and therefore vibrating diaphragm vibrates and sounding.The advantages of electrostatic loudspeaker is whole vibrating diaphragm in phase vibration, and vibrating diaphragm is light, loses
It is very small, extremely clear and melodious sound can be reset, there is parsing power, clarity of detail, acoustic fidelity well.Its shortcomings that is efficiency
It is low, it is necessary to high-voltage DC power supply, easy dust suction, vibrating diaphragm increases distortion and can also increased, and is not suitable for listening rock and roll, heavy metal music, valency
Lattice are more comparatively expensive.
Capacitance variations pole of the present invention and capacitance cathode or electric capacity negative pole belong to thin film capacitor.Thin film capacitor
It is that electrode is worked as with metal foil, itself and poly- ethyl ester, polypropylene, the plastic sheeting such as polystyrene or makrolon is overlapping from both ends
Afterwards, it is wound into the capacitor of the construction of cylindrical shape.And it is hereinafter referred to as poly- ethyl ester electric capacity (also known as according to the species of plastic sheeting
Mylar electric capacity), polypropylene capactive (is also known as PP electric capacity), polystyrene electric capacity (also known as PS electric capacity) and poly- carbonic acid electric capacity.It is situated between by electricity
Thin film capacitor can be divided into following three types by the difference of matter：It is T-shaped：That is PET-Polyethylene (mylars
Salt (or ester)) p-type：That is PP-Polypropylene (polypropylene) N-type：That is PEN-Polyethylene Naphthalate are (poly-
Ethene is divided into again according to the species of plastic sheeting：Poly- ethyl ester electric capacity (also known as Mylar electric capacity), polypropylene capactive (also known as PP electricity
Hold), polystyrene electric capacity (also known as PS electric capacity) and poly- carbonic acid electric capacity.Its structure is identical with paper dielectric capacitance, medium be terylene or
Polystyrene etc..Mylar electric capacity, dielectric constant is higher, and small volume, capacity is big, and stability is relatively good, suitably does bypass electricity
Hold.Polystyrene film electric capacity, dielectric loss is small, and insulaion resistance is high, but temperature coefficient is big, available for high-frequency circuit.
Thin film capacitor can be divided into direct current thin film capacitor and the major class of AC diaphragm capacitor two：Direct current thin film capacitor is
Refer to the thin film capacitor being operated in in the circuit of dc source power supply, general class can be divided into, suppress powered electromagnetic interference class, arteries and veins
Rush class and the class of accurate class four；AC diaphragm capacitor refers to the thin film capacitor being operated in the circuit powered with AC power,
Divide motor start-up operation, power factor compensation etc. by function.Thin film capacitor is due to many excellent characteristics
A kind of capacitor of excellent performance.Its key property is as follows：Nonpolarity, insulation impedance is very high, and frequency characteristic is excellent, and (frequency is rung
Should be broad), and dielectric loss very little.The advantages of based on the above, so thin film capacitor is widely used on analog circuit.
Especially in the part of signal commissure, it is necessary to which frequency of use characteristic is good, the extremely low capacitor of dielectric loss, can ensure signal
In transmission, do not have too big distortion situation and occur.Among all plastic sheeting electric capacity, and with polypropylene (PP) electric capacity
The most notable with the characteristic of polystyrene (PS) electric capacity, the price of both certain capacitors is also higher.But sound appliances
In order to lift the quality of sound, used part material is more and more advanced, and price is not most important considerations, so
PP electric capacity and PS electric capacity be used in sound appliances frequency and quantity it is also more and more high.Readers can be frequently seen so-and-so board
Equipment, be known as the PP matter electric capacity or PS matter electric capacity for having used so-and-so how many famous brands, with as the standard in sound quality, its road
Manage just herein.
Its preparation method of common thin film capacitor be by the metal foils such as aluminium as electrode and plastic sheeting it is overlapping after wound on one
Rise and be made.But thin film capacitor has a kind of autofrettage in addition, is called metallized film (Metallized Film) again, it is made
Method is on a plastic film with the very thin metal of vacuum evaporation last layer with as electrode.The thickness of electrode foil can so be saved
Degree, the volume of capacitor unit capacity is reduced, so thin film capacitor is easier to make small-sized, the big capacitor of capacity.Such as
Common MKP electric capacity, it is exactly metallized polypropylene film capacitor (Metailized Polypropylene Film
Capacitor in generation), claims, and the generation that MKT is then metallized polyimide ethyl ester electric capacity (Metailized Polyester) claims.Metallization
Film used in thin film capacitor has poly- ethyl ester, polypropylene, makrolon etc., in addition to convoluted, also there is lamination-type.Gold
The capacitor of this kenel of categoryization film has a kind of so-called ego resilience effect (Self Healing Action), i.e., false
If the tiny segment of electrode causes short circuit because of electric boundary's matter fragility, cause the electrode metal around short-circuiting percentage, can be because working as
When capacitor institute band electrostatic energy or short circuit current, and trigger it is greater area of dissolve and evaporate and recover to insulate, make electric capacity
Device replys the effect of capacitor once again.Polystyrene film electric capacity, dielectric loss is small, and insulaion resistance is high, but temperature coefficient is big,
Available for high-frequency circuit.
The ultra-thin loudspeaker structure that the present embodiment is realized, changes loudspeaker electromagnetic principle, using capacitance principle, reduces and raises
Sound device height, loudspeaker cost is reduced, be adapted to less and less or Highgrade integration mobile terminal.
Embodiment two
Second embodiment of the invention provides a kind of ultra-thin loudspeaker structure, as shown in figure 3, comprising：Frame 1, ring 2；Institute
Ring 2 to be stated to be fixed on the frame 1, the front of the ring 2 sets capacitance variations pole 3, as shown in figure 4, the ring 2
The back side sets electric capacity negative pole 4, and the capacitance variations pole 3 is fixed with the ring 2, and the electric capacity negative pole 4 is fixed with frame 1.Institute
State capacitance variations pole 3, electric capacity negative pole 4 is membrane structure that thickness is 0.2mm.
Specifically, the frame 1 is a rectangular metal ring, for the supporting construction as loudspeaker.The shape of frame is determined
Determine the net shape of loudspeaker.In the present embodiment, frame is straight-flanked ring, and material is metal, such as aluminium ring, aluminum alloy ring.Certainly,
Frame can also be other suitable shapes such as circle, ellipse.
The inner ring of the frame 1 fixes the ring 2.At least one annular groove, the ring are set on the ring
Centrally disposed vibrating diaphragm.
Ring：Ring is indispensable in loudspeaker, vibration of membrane that its most basic effect is support and holding is shaken,
Enable vibrating diaphragm axially movable, and be unable to transverse movement, common ring material has fiber+composite coating material, rubber, foaming
The material such as resin and foam.Vibrating diaphragm：When additional audio signal, diaphragm oscillations, vibrating diaphragm then promotes air, produces sound wave.Vibrating diaphragm
When vibration frequency is higher, it may appear that diaphagras, increase fold can change the shape of diaphagras in vibrating diaphragm tapered slope
State, if being designed to work as, the high frequency characteristics of unit can be improved, shake film strength and damping can also be increased.Good vibrating diaphragm should
It is larger pliable that this can allow vibrating diaphragm to have upwards in vibrating shaft, and has stronger rigidity in the horizontal.Shaken in as big as possible
Make vibration of membrane of shaking more linear in dynamic scope.And it should not have obvious resonance and anti-phase vibration, quality will also try one's best
It is light.
Loudspeaker is a kind of energy transducer for electric signal being changed into acoustical signal, the shadow of the performance quality of loudspeaker to tonequality
Sound is very big.The species of loudspeaker is various, and price differs greatly.Audio electric energy makes it by electromagnetism, piezoelectricity or electrostatic effect
Cone or diaphragm vibration simultaneously produce resonance (sympathetic response) with the air of surrounding and send sound.
The present invention ultrathin loudspeaker when in use, if capacitance variations pole 3 is charged as positive charge, capacitance variations pole 3
Electric capacity negative pole 4 with being arranged at the ring back side attracts each other, capacitance variations pole 3 and be arranged at the electric capacity negative pole at the ring back side by
The effect of attraction moves closer to, and promotes air to produce acoustic pressure.
When capacitance variations pole 3 is charged as negative electrical charge, then electric capacity negative pole 4 phase of the capacitance variations pole with being arranged at the ring back side
Mutually repel, capacitance variations pole 3 is moved upwards, is promoted air to produce acoustic pressure, is sent sound.Acoustic pressure is exactly that atmospheric pressure is disturbed by sound wave
Change caused by after dynamic, as the overbottom pressure of atmospheric pressure, it causes equivalent to one acoustic perturbation of superposition on atmospheric pressure
Pressure change.Because the measurement of acoustic pressure is easier to realize, particle velocity etc. can also be tried to achieve indirectly by the measurement of acoustic pressure
Other physical quantitys, so commonly using this physical quantity in acoustics to describe sound wave.
When the charging of capacitance variations pole 3 negative electrical charge tapers into, repulsive force tapers into, when capacitance variations are extremely not charged
During lotus, nature position is returned to.
When the electric signal that capacitance variations pole receives is sinusoidal signal, capacitance variations pole produces sinusoidal vibration, produces just
String wave acoustic signals.
On the whole, ultrathin loudspeaker of the invention belongs to electrostatic loudspeaker, is quiet on capacitor plate using being added to
Electric power and the loudspeaker to work, see with regard to its structure, because both positive and negative polarity forms capacitor-like in opposite directions, so also known as condenser loudspeaker.
In the prior art, electrostatic loudspeaker has two pieces of thickness and hard material is as fixed polar plate, on pole plate it is possible thereby to through sound, in
Between a piece of pole plate then make vibrating diaphragm (such as aluminium film) with thin and light material.Fixed around vibrating diaphragm, tension is kept into phase with fixed pole
Work as distance, on big vibrating diaphragm, will not also be collided with fixed pole.An original DC voltage between the electrode of electrostatic loudspeaker two
(referred to as biasing).If the audio voltage exported between two electrodes plus by amplifier, overlaps with original output voltage, formed
The pulsating volage of alternation, this pulsating volage results from the strong and weak change of two clearance between poles attractions, and therefore vibrating diaphragm vibrates and sent out
Sound.The advantages of electrostatic loudspeaker is whole vibrating diaphragm in phase vibration, and vibrating diaphragm is light, distortion is small, can reset extremely clear and melodious sound, have
Parsing power, clarity of detail, acoustic fidelity well.Its shortcomings that is that efficiency is low, it is necessary to which high-voltage DC power supply, easy dust suction, shake
Film increases distortion and can also increased, and is not suitable for listening rock and roll, heavy metal music, and price is more comparatively expensive.
Capacitance variations pole of the present invention and capacitance cathode or electric capacity negative pole belong to thin film capacitor.Thin film capacitor
It is that electrode is worked as with metal foil, itself and poly- ethyl ester, polypropylene, the plastic sheeting such as polystyrene or makrolon is overlapping from both ends
Afterwards, it is wound into the capacitor of the construction of cylindrical shape.And it is hereinafter referred to as poly- ethyl ester electric capacity (also known as according to the species of plastic sheeting
Mylar electric capacity), polypropylene capactive (is also known as PP electric capacity), polystyrene electric capacity (also known as PS electric capacity) and poly- carbonic acid electric capacity.It is situated between by electricity
Thin film capacitor can be divided into following three types by the difference of matter：It is T-shaped：That is PET-Polyethylene (mylars
Salt (or ester)) p-type：That is PP-Polypropylene (polypropylene) N-type：That is PEN-Polyethylene Naphthalate are (poly-
Ethene is divided into again according to the species of plastic sheeting：Poly- ethyl ester electric capacity (also known as Mylar electric capacity), polypropylene capactive (also known as PP electricity
Hold), polystyrene electric capacity (also known as PS electric capacity) and poly- carbonic acid electric capacity.Its structure is identical with paper dielectric capacitance, medium be terylene or
Polystyrene etc..Mylar electric capacity, dielectric constant is higher, and small volume, capacity is big, and stability is relatively good, suitably does bypass electricity
Hold.Polystyrene film electric capacity, dielectric loss is small, and insulaion resistance is high, but temperature coefficient is big, available for high-frequency circuit.
Thin film capacitor can be divided into direct current thin film capacitor and the major class of AC diaphragm capacitor two：Direct current thin film capacitor is
Refer to the thin film capacitor being operated in in the circuit of dc source power supply, general class can be divided into, suppress powered electromagnetic interference class, arteries and veins
Rush class and the class of accurate class four；AC diaphragm capacitor refers to the thin film capacitor being operated in the circuit powered with AC power,
Divide motor start-up operation, power factor compensation etc. by function.Thin film capacitor is due to many excellent characteristics
A kind of capacitor of excellent performance.Its key property is as follows：Nonpolarity, insulation impedance is very high, and frequency characteristic is excellent, and (frequency is rung
Should be broad), and dielectric loss very little.The advantages of based on the above, so thin film capacitor is widely used on analog circuit.
Especially in the part of signal commissure, it is necessary to which frequency of use characteristic is good, the extremely low capacitor of dielectric loss, can ensure signal
In transmission, do not have too big distortion situation and occur.Among all plastic sheeting electric capacity, and with polypropylene (PP) electric capacity
The most notable with the characteristic of polystyrene (PS) electric capacity, the price of both certain capacitors is also higher.But sound appliances
In order to lift the quality of sound, used part material is more and more advanced, and price is not most important considerations, so
PP electric capacity and PS electric capacity be used in sound appliances frequency and quantity it is also more and more high.Readers can be frequently seen so-and-so board
Equipment, be known as the PP matter electric capacity or PS matter electric capacity for having used so-and-so how many famous brands, with as the standard in sound quality, its road
Manage just herein.
Its preparation method of common thin film capacitor be by the metal foils such as aluminium as electrode and plastic sheeting it is overlapping after wound on one
Rise and be made.But thin film capacitor has a kind of autofrettage in addition, is called metallized film (Metallized Film) again, it is made
Method is on a plastic film with the very thin metal of vacuum evaporation last layer with as electrode.The thickness of electrode foil can so be saved
Degree, the volume of capacitor unit capacity is reduced, so thin film capacitor is easier to make small-sized, the big capacitor of capacity.Such as
Common MKP electric capacity, it is exactly metallized polypropylene film capacitor (Metailized Polypropylene Film
Capacitor in generation), claims, and the generation that MKT is then metallized polyimide ethyl ester electric capacity (Metailized Polyester) claims.
The ultra-thin loudspeaker structure that the present embodiment is realized, change loudspeaker electromagnetic principle, using capacitance principle, reduce and raise one's voice
Device height, loudspeaker cost is reduced, be adapted to less and less or Highgrade integration mobile terminal.
Embodiment three
Third embodiment of the invention provides a kind of mobile terminal, and the mobile terminal includes ultra-thin loudspeaker structure, described
Ultra-thin loudspeaker structure includes：Frame 1, ring 2；The ring 2 is fixed on the frame 1, the front setting of the ring 2
Capacitance variations pole 3, the back side of the ring 2 set capacitance cathode or electric capacity negative pole, the capacitance variations pole 3 and the ring 2
Fixed, capacitance cathode or the electric capacity negative pole is fixed with frame 1.The capacitance variations pole, capacitance cathode or electric capacity negative pole are thickness
Spend the membrane structure for 0.2mm.
Specifically, the frame is a rectangular metal ring, for the supporting construction as loudspeaker.The shape of frame determines
The net shape of loudspeaker.In the present embodiment, frame is straight-flanked ring, and material is metal, such as aluminium ring, aluminum alloy ring.Certainly, canopy
Frame can also be other suitable shapes such as circle, ellipse.
The inner ring of the frame fixes the ring.At least one annular groove is set on the ring, the ring
Centrally disposed vibrating diaphragm.
Ring：Ring is indispensable in loudspeaker, vibration of membrane that its most basic effect is support and holding is shaken,
Enable vibrating diaphragm axially movable, and be unable to transverse movement, common ring material has fiber+composite coating material, rubber, foaming
The material such as resin and foam.Vibrating diaphragm：When additional audio signal, diaphragm oscillations, vibrating diaphragm then promotes air, produces sound wave.Vibrating diaphragm
When vibration frequency is higher, it may appear that diaphagras, increase fold can change the shape of diaphagras in vibrating diaphragm tapered slope
State, if being designed to work as, the high frequency characteristics of unit can be improved, shake film strength and damping can also be increased.Good vibrating diaphragm should
It is larger pliable that this can allow vibrating diaphragm to have upwards in vibrating shaft, and has stronger rigidity in the horizontal.Shaken in as big as possible
Make vibration of membrane of shaking more linear in dynamic scope.And it should not have obvious resonance and anti-phase vibration, quality will also try one's best
It is light.
Loudspeaker is a kind of energy transducer for electric signal being changed into acoustical signal, the shadow of the performance quality of loudspeaker to tonequality
Sound is very big.The species of loudspeaker is various, and price differs greatly.Audio electric energy makes it by electromagnetism, piezoelectricity or electrostatic effect
Cone or diaphragm vibration simultaneously produce resonance (sympathetic response) with the air of surrounding and send sound.
When in use, the front using ring is capacitance variations pole, the back side as capacitance cathode to the ultrathin loudspeaker of the present invention
Exemplified by structure：
If capacitance variations pole is charged as positive charge, capacitance variations pole and the capacitance cathode for being arranged at the ring back side are mutual
Repel, capacitance variations are extremely moved upwards, are promoted air to produce acoustic pressure, are sent sound.Acoustic pressure is exactly atmospheric pressure by acoustic perturbation
The overbottom pressure of caused change afterwards, as atmospheric pressure, it is equivalent to caused by one acoustic perturbation of superposition on atmospheric pressure
Pressure change.Because the measurement of acoustic pressure is easier to realize, by the measurement of acoustic pressure can also try to achieve indirectly particle velocity etc. its
Its physical quantity, so commonly using this physical quantity in acoustics to describe sound wave.
When the capacitance variations pole charging positive charge tapers into, repulsive force tapers into, when capacitance variations are extremely not charged
During lotus, nature position is returned to.
When capacitance variations pole is charged as negative electrical charge, capacitance variations pole is inhaled with being arranged at the capacitance cathode at the ring back side
The effect of gravitation moves closer to, and promotes air to produce acoustic pressure.
When the electric signal sinusoidal signal that capacitance variations pole receives, capacitance variations pole produces sinusoidal vibration, produces sinusoidal
Wave acoustic signals.
The ultrathin loudspeaker of the present invention is electric capacity negative pole by capacitance variations pole, the back side of the front of ring when in use
Exemplified by structure：
If capacitance variations pole is charged as positive charge, capacitance variations pole and be arranged at the electric capacity negative pole at the ring back side by
The effect of attraction moves closer to, and promotes air to produce acoustic pressure.
When capacitance variations pole is charged as negative electrical charge, then capacitance variations pole and the electric capacity negative pole for being arranged at the ring back side are mutual
Repel, capacitance variations are extremely moved upwards, are promoted air to produce acoustic pressure, are sent sound.Acoustic pressure is exactly atmospheric pressure by acoustic perturbation
The overbottom pressure of caused change afterwards, as atmospheric pressure, it is equivalent to caused by one acoustic perturbation of superposition on atmospheric pressure
Pressure change.Because the measurement of acoustic pressure is easier to realize, by the measurement of acoustic pressure can also try to achieve indirectly particle velocity etc. its
Its physical quantity, so commonly using this physical quantity in acoustics to describe sound wave.
When the capacitance variations pole charging negative electrical charge tapers into, repulsive force tapers into, when capacitance variations are extremely not charged
During lotus, nature position is returned to.
When the electric signal that capacitance variations pole receives is sinusoidal signal, capacitance variations pole produces sinusoidal vibration, produces just
String wave acoustic signals.
On the whole, ultrathin loudspeaker of the invention belongs to electrostatic loudspeaker, is quiet on capacitor plate using being added to
Electric power and the loudspeaker to work, see with regard to its structure, because both positive and negative polarity forms capacitor-like in opposite directions, so also known as condenser loudspeaker.
In the prior art, electrostatic loudspeaker has two pieces of thickness and hard material is as fixed polar plate, on pole plate it is possible thereby to through sound, in
Between a piece of pole plate then make vibrating diaphragm (such as aluminium film) with thin and light material.Fixed around vibrating diaphragm, tension is kept into phase with fixed pole
Work as distance, on big vibrating diaphragm, will not also be collided with fixed pole.An original DC voltage between the electrode of electrostatic loudspeaker two
(referred to as biasing).If the audio voltage exported between two electrodes plus by amplifier, overlaps with original output voltage, formed
The pulsating volage of alternation, this pulsating volage results from the strong and weak change of two clearance between poles attractions, and therefore vibrating diaphragm vibrates and sent out
Sound.The advantages of electrostatic loudspeaker is whole vibrating diaphragm in phase vibration, and vibrating diaphragm is light, distortion is small, can reset extremely clear and melodious sound, have
Parsing power, clarity of detail, acoustic fidelity well.Its shortcomings that is that efficiency is low, it is necessary to which high-voltage DC power supply, easy dust suction, shake
Film increases distortion and can also increased, and is not suitable for listening rock and roll, heavy metal music, and price is more comparatively expensive.
Capacitance variations pole of the present invention and capacitance cathode or electric capacity negative pole belong to thin film capacitor.Thin film capacitor
It is that electrode is worked as with metal foil, itself and poly- ethyl ester, polypropylene, the plastic sheeting such as polystyrene or makrolon is overlapping from both ends
Afterwards, it is wound into the capacitor of the construction of cylindrical shape.And it is hereinafter referred to as poly- ethyl ester electric capacity (also known as according to the species of plastic sheeting
Mylar electric capacity), polypropylene capactive (is also known as PP electric capacity), polystyrene electric capacity (also known as PS electric capacity) and poly- carbonic acid electric capacity.It is situated between by electricity
Thin film capacitor can be divided into following three types by the difference of matter：It is T-shaped：That is PET-Polyethylene (mylars
Salt (or ester)) p-type：That is PP-Polypropylene (polypropylene) N-type：That is PEN-Polyethylene Naphthalate are (poly-
Ethene is divided into again according to the species of plastic sheeting：Poly- ethyl ester electric capacity (also known as Mylar electric capacity), polypropylene capactive (also known as PP electricity
Hold), polystyrene electric capacity (also known as PS electric capacity) and poly- carbonic acid electric capacity.Its structure is identical with paper dielectric capacitance, medium be terylene or
Polystyrene etc..Mylar electric capacity, dielectric constant is higher, and small volume, capacity is big, and stability is relatively good, suitably does bypass electricity
Hold.Polystyrene film electric capacity, dielectric loss is small, and insulaion resistance is high, but temperature coefficient is big, available for high-frequency circuit.
Thin film capacitor can be divided into direct current thin film capacitor and the major class of AC diaphragm capacitor two：Direct current thin film capacitor is
Refer to the thin film capacitor being operated in in the circuit of dc source power supply, general class can be divided into, suppress powered electromagnetic interference class, arteries and veins
Rush class and the class of accurate class four；AC diaphragm capacitor refers to the thin film capacitor being operated in the circuit powered with AC power,
Divide motor start-up operation, power factor compensation etc. by function.Thin film capacitor is due to many excellent characteristics
A kind of capacitor of excellent performance.Its key property is as follows：Nonpolarity, insulation impedance is very high, and frequency characteristic is excellent, and (frequency is rung
Should be broad), and dielectric loss very little.The advantages of based on the above, so thin film capacitor is widely used on analog circuit.
Especially in the part of signal commissure, it is necessary to which frequency of use characteristic is good, the extremely low capacitor of dielectric loss, can ensure signal
In transmission, do not have too big distortion situation and occur.Among all plastic sheeting electric capacity, and with polypropylene (PP) electric capacity
The most notable with the characteristic of polystyrene (PS) electric capacity, the price of both certain capacitors is also higher.But sound appliances
In order to lift the quality of sound, used part material is more and more advanced, and price is not most important considerations, so
PP electric capacity and PS electric capacity be used in sound appliances frequency and quantity it is also more and more high.Readers can be frequently seen so-and-so board
Equipment, be known as the PP matter electric capacity or PS matter electric capacity for having used so-and-so how many famous brands, with as the standard in sound quality, its road
Manage just herein.
Its preparation method of common thin film capacitor be by the metal foils such as aluminium as electrode and plastic sheeting it is overlapping after wound on one
Rise and be made.But thin film capacitor has a kind of autofrettage in addition, is called metallized film (Metallized Film) again, it is made
Method is on a plastic film with the very thin metal of vacuum evaporation last layer with as electrode.The thickness of electrode foil can so be saved
Degree, the volume of capacitor unit capacity is reduced, so thin film capacitor is easier to make small-sized, the big capacitor of capacity.Such as
Common MKP electric capacity, it is exactly metallized polypropylene film capacitor (Metailized Polypropylene Film
Capacitor in generation), claims, and the generation that MKT is then metallized polyimide ethyl ester electric capacity (Metailized Polyester) claims.
Film used in metallic film capacitor has poly- ethyl ester, polypropylene, makrolon etc., except it is convoluted it
Outside, also there is lamination-type.The capacitor of this kenel of metallized film has a kind of so-called ego resilience effect (Self
Healing Action), that is, when assuming that the tiny segment of electrode causes short circuit because of electric boundary's matter fragility, cause short-circuiting percentage all
The electrode metal enclosed, can be because of the electrostatic energy or short circuit current of capacitor institute band at that time, and triggers and greater area of dissolve and steam
Send out and recover insulation, capacitor is replied the effect of capacitor once again.
Polystyrene film electric capacity, dielectric loss is small, and insulaion resistance is high, but temperature coefficient is big, available for high-frequency circuit.
The mobile terminal that the present embodiment is realized is provided with ultra-thin loudspeaker structure, and the ultra-thin loudspeaker structure changes loudspeaker
Electromagnetic principle, requires thin using capacitance principle, electrode material, only needs to reserve between two electrodes to be slightly larger than amplitude space, same to shake
It is thick by electrode material 0.2mm in the case of width is with acoustic pressure, the +/- 0.4mm of amplitude, whole speaker height only need 1.3mm thickness with
On can with realize.For at least meeting 3mm thickness accordingly, with respect to conventional loudspeakers, greatly reduce speaker height,
Loudspeaker cost is reduced, is adapted to less and less or Highgrade integration mobile terminal.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or device including a series of elements not only include those key elements, and
And also include the other element being not expressly set out, or also include for this process, method, article or device institute inherently
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this
Other identical element also be present in the process of key element, method, article or device.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on such understanding, technical scheme is substantially done to prior art in other words
Going out the part of contribution can be embodied in the form of software product, and the computer software product is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), including some instructions to cause a station terminal (can be mobile phone, computer, service
Device, air conditioner, or network equipment etc.) perform method described in each embodiment of the present invention.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, one of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make a lot
Form, these are belonged within the protection of the present invention.
Claims (10)
1. a kind of ultra-thin loudspeaker structure, it is characterised in that include：
Frame, ring；
The ring is fixed on the frame, and the front of the ring sets capacitance variations pole, and the back side of the ring is set
Capacitance cathode or electric capacity negative pole, the capacitance variations pole are fixed with the ring, capacitance cathode or the electric capacity negative pole with
Frame is fixed.
2. ultra-thin loudspeaker structure according to claim 1, it is characterised in that：The frame is a rectangular metal ring, institute
The height for stating frame is less than 1.5mm, and the inner ring of the frame fixes the ring.
3. ultra-thin loudspeaker structure according to claim 1 or 2, it is characterised in that：Set on the ring at least one
Annular groove, the centrally disposed vibrating diaphragm of the ring.
4. ultra-thin loudspeaker structure according to claim 1 or 2, it is characterised in that：The periphery of the ring is at least one
Individual circular groove structure, center are film.
5. ultra-thin loudspeaker structure according to claim 1, it is characterised in that：The capacitance variations pole is charged as positive charge
When, mutually exclusive with the capacitance cathode that is arranged at the ring back side, capacitance variations are extremely moved upwards, promote air to produce acoustic pressure, hair
Go out sound.
6. ultra-thin loudspeaker structure according to claim 1, it is characterised in that：Capacitance variations pole charging positive charge by
Gradual change hour, repulsive force taper into, and when capacitance variations pole neutral, capacitance variations pole is returned to nature position.
7. ultra-thin loudspeaker structure according to claim 1, it is characterised in that：When capacitance variations pole is charged as negative electrical charge
When, capacitance variations pole is moved closer to being arranged at the capacitance cathode at the ring back side by the effect of attraction, promotes air to produce
Acoustic pressure.
8. ultra-thin loudspeaker structure according to claim 1, it is characterised in that：When capacitance variations pole receives sinusoidal signal
When, capacitance variations pole produces sinusoidal vibration, produces sinusoidal wave acoustic signals.
9. ultra-thin loudspeaker structure according to claim 1, it is characterised in that：The capacitance variations pole, capacitance cathode or
Electric capacity negative pole is the film that thickness is 0.2mm.
A kind of 10. mobile terminal, it is characterised in that：The mobile terminal is provided with claim 1-9, and any one ultra-thin is raised one's voice
Device structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021709.XA CN107820170A (en) | 2017-10-27 | 2017-10-27 | A kind of ultra-thin loudspeaker structure and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021709.XA CN107820170A (en) | 2017-10-27 | 2017-10-27 | A kind of ultra-thin loudspeaker structure and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107820170A true CN107820170A (en) | 2018-03-20 |
Family
ID=61604139
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| Application Number | Title | Priority Date | Filing Date |
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| Country | Link |
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| CN (1) | CN107820170A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014100012A1 (en) * | 2012-12-20 | 2014-06-26 | The Regents Of The University Of California | Electrostatic graphene speaker |
| CN104780489A (en) * | 2015-03-31 | 2015-07-15 | 歌尔声学股份有限公司 | Structure for detecting vibration displacement of loudspeaker and double-effect device capable of realizing acoustic-electric inter-conversion |
| CN106658317A (en) * | 2016-11-21 | 2017-05-10 | 歌尔股份有限公司 | MEMS sound generating device and electronic equipment |
-
2017
- 2017-10-27 CN CN201711021709.XA patent/CN107820170A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014100012A1 (en) * | 2012-12-20 | 2014-06-26 | The Regents Of The University Of California | Electrostatic graphene speaker |
| CN104780489A (en) * | 2015-03-31 | 2015-07-15 | 歌尔声学股份有限公司 | Structure for detecting vibration displacement of loudspeaker and double-effect device capable of realizing acoustic-electric inter-conversion |
| CN106658317A (en) * | 2016-11-21 | 2017-05-10 | 歌尔股份有限公司 | MEMS sound generating device and electronic equipment |
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Application publication date: 20180320 |
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