CN102209286A - Electrodynamic flat panel loudspeaker using transparent sound production medium and realization method thereof - Google Patents
Electrodynamic flat panel loudspeaker using transparent sound production medium and realization method thereof Download PDFInfo
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- CN102209286A CN102209286A CN2010101548301A CN201010154830A CN102209286A CN 102209286 A CN102209286 A CN 102209286A CN 2010101548301 A CN2010101548301 A CN 2010101548301A CN 201010154830 A CN201010154830 A CN 201010154830A CN 102209286 A CN102209286 A CN 102209286A
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Abstract
The invention discloses an electrodynamic flat panel loudspeaker using a transparent sound production medium, a method for determining the material, area, thickness and reinforcing ribs of a transparent medium sound production plate made of the loudspeaker, a mounting method for the loudspeaker and a corresponding computational formula. After transparent materials such as glass, organic glass, transparent polycarbonate and the like are confirmed to be selected and arranged, good sound production effects can be achieved. The sound production plate of the electrodynamic flat panel loudspeaker is concealed, so the electrodynamic flat panel loudspeaker can be widely used for products such as a liquid crystal flat panel television set, a mobile phone with a liquid crystal screen and the like, and endows the products with a thinner and more fashionable shape. Moreover, the sound production medium has a large area and high vibration conductivity, and a sound production surface is overlapped with an image, so the product has a wider vocal range and higher tone quality, greatly increases positive sound pressure and more accurately positions a sound figure. In addition, the loudspeaker is suitable for occasions such as bank counters, meeting rooms in prisons and the like in which the sense of sight and the sense of hearing cannot be obstructed and are required to be isolated.
Description
Affiliated technical field
The invention of this reality relates to a kind of transparent sounding medium driven plate loud speaker, and the mobile phone of especially a kind of liquid crystal TV set, band liquid crystal display screen etc. has the transparent sounding medium driven plate loud speaker of the household electrical appliance use of video and audio-frequency function simultaneously.
Background technology
At present, known driven plate loud speaker mostly uses cellular aluminium sheet or cardboard, plank etc. as the sounding dielectric material.Although these sounding dielectric materials can make the volume of driven plate loud speaker and range meet general civilian requirement, and its thickness can be done very thinly, but these materials are opaque, they are used in the products such as mobile phone of liquid crystal TV set, band liquid crystal display screen, owing to can not before liquid crystal display screen, install, so must occupy the surface area of corresponding product, the area of product and even volume are strengthened, and outward appearance be handled also very difficult.So use the driven plate loud speaker of these dielectric materials generally all only to be fit to make independently flat audio amplifier, and the inconvenient mobile phones that are used in liquid crystal flat-panel television set, band liquid crystal display screen etc. have in the household electronic products of video and audio-frequency function simultaneously.This is the major reason that mass-produced up to now dull and stereotyped liquid crystal TV set, the mobile phone of being with liquid crystal display screen do not use driven plate to raise one's voice.
Because the mobile phone of dull and stereotyped liquid crystal TV set, band liquid crystal display screen still uses traditional cone loudspeaker so far, the tapering of cone loudspeaker has become the huge obstacle of ultra-thinization of mobile phone of dull and stereotyped liquid crystal TV set, band liquid crystal display screen.And ultra-thin and subminiature cone loudspeaker also make slim liquid crystal TV set, particularly slim and narrow and small than the range of mini zone liquid crystal display screen mobile phone, tone color is difficult as people's will.
In addition, use traditional cone loudspeaker, need leave sound hole at liquid crystal TV set casing front panel, influence attractive in appearance, so the liquid crystal TV set of many modern designs all has to the cone loudspeaker are installed towards bottom or both sides, this makes the positive acoustic pressure of this liquid crystal TV set descend greatly, and makes slippage oof sound to picture more serious.
Use the pronunciation board of transparent dielectric material as the driven plate loud speaker, and make it with liquid crystal TV set, be with the casing front panel of the products such as mobile phone of liquid crystal display screen to unite two into one, be the outlet of dealing with problems.But, glass, can polymethyl methacrylate or other transparent material sounding? if energy sounding, in order to try to achieve best sounding effect, how to select material, material thickness and material area? if with liquid crystal TV set, the casing front panel of band liquid crystal display screen mobile phone is used as the pronunciation board of driven plate loud speaker simultaneously, how about does the machine problem of shaking that causes casing and even entire product thus solve? in addition, the driven plate loud speaker is at liquid crystal TV set, should guarantee in the use of band liquid crystal display screen mobile phone that it has sufficient oscillation space to avoid vibrating destruction to its normal operating conditions again, stable and the integrity problem of also promptly working all is that the present invention needs the problem of solution conscientiously.
Summary of the invention
In order to overcome the defective of existing driven plate loud speaker sounding dielectric material, the present invention proposes the driven plate loud speaker of a kind of transparent dielectric material as pronunciation board, and after confirming that transparent materials such as glass, polymethyl methacrylate, transparent PC are by certain method selection and installation, all can realize fabulous sounding effect.And solution the machine stable and integrity problem that shakes and work effectively.In view of the above, the present invention proposes the definite method of employing of material, area, thickness and reinforcement of this loud speaker transparent medium pronunciation board and the installation method and the corresponding calculated formula of this loud speaker.
The technical solution adopted for the present invention to solve the technical problems is: the magnet steel of driven plate loud speaker is installed a voice coil loudspeaker voice coil, promote sounding medium sounding by voice coil loudspeaker voice coil, it is characterized in that: the phonation board of this loud speaker adopts glass or transparent dielectric materials such as polymethyl methacrylate or transparent PC to make, and also comprises the definite method of employing of material, area, thickness and reinforcement of this loud speaker transparent medium pronunciation board that the present invention proposes and the installation method of this loud speaker simultaneously.
Definite method of the employing of the material of pronunciation board of the present invention, area, thickness and reinforcement is: the maximum area that is determined the pronunciation board material by the surface area of products such as liquid crystal TV set, band liquid crystal display screen mobile phone; Determine the thickness of pronunciation board material by the audio sound forcing up the targets of set audio frequency electromotive power output of product and product needed; Under the situation of set area and set thickness, check and cut apart distortion and range width situation.Cutting apart distortion as existence then should increase material thickness or use reinforcement to increase material stiffness, overcomes and cuts apart distortion.Undesirable as the range width, then should reelect material or adjust the frequency characteristic of electrical output signal, with the frequency characteristic defective of compensation pronunciation material.
For fear of loaded down with trivial details Theoretical Calculation, the present invention proposes the simple and easy empirical Calculation formula of a material thickness:
Material thickness=k * audio-frequency electric power output/acoustic pressure
Wherein: k is a particular factor, determines its value by specific products index, certain material;
Acoustic pressure is the acoustic pressure index dB number of product;
The audio-frequency electric power output is the audio-frequency electric power output w number of a sound channel of product;
This formula does not have the parameter of material area, this is because under set audio-frequency electric power output condition, after the area of pronunciation board has reached a certain fixed number value, it produces the size of acoustic pressure and the relation of material area just is a kind of saturation condition, and this is the best performance state of the audio-frequency electric power output of the present invention's discovery just, based on this discovery, can in computing formula, not consider the area effect of pronunciation board, make computational short cut, engineering experiment quick.Therefore set audio-frequency electric power output and certain pronunciation board area is the service condition of this formula.
The derivation method of the simple and easy empirical Calculation formula of the present invention is: under the condition of a certain audio-frequency electric power output, the a certain material thickness of getting the suitable a certain material of product is as the unit root thickness, increase the area of this kind material from small to large, and the sound pressure level when writing down all different area, when material area increases, and the sound pressure level increase is very little even when not increasing substantially, acoustic pressure and material area just are saturation condition, and the usable range of the material area during this state is exactly the service condition of formula; And at this moment the dB number of acoustic pressure is exactly the value of k divided by the value of the w number of power.This has just derived the simple and easy empirical equation of the used test material of specific products.Use this derivation method, can derive different product indexs, the simple and easy empirical equation when using different materials.
With this empirical equation result calculated is the basis, can obtain the accurate data of driven plate loud speaker pronunciation board material of the present invention through engineering experiment efficiently.
The installation method of driven plate loud speaker of the present invention is: the promotion voice coil loudspeaker voice coil of loud speaker directly adheres on the front panel of the liquid crystal TV set made with glass or polymethyl methacrylate or transparent PC or other transparent material or band liquid crystal display screen mobile phone, makes the front panel of this product become the pronunciation board of driven plate loud speaker simultaneously.Simultaneously the product front panel as driven plate loud speaker pronunciation board is fixed on the preceding frame of product by elastomeric material, shakes in order to avoid the transfer of vibration of pronunciation board produces tedious machine to preceding frame and even whole casing.The magnet steel of this loud speaker is fixed on the magnet steel strutting piece by a cushion, and this magnet steel strutting piece is fastened on the product case.Can guarantee that like this loud speaker magnet steel has enough oscillation spaces when keeping poised state, work when not working, do not damage when being subjected to certain external impacts.
Owing to thickness, the area relationship of acoustic pressure that experimental results show that loud speaker pronunciation board of the present invention and material are tight, and basic irrelevant with the bonding location that promotes voice coil loudspeaker voice coil.So, the promotion voice coil loudspeaker voice coil can be bonded to edge, the especially lower edge of product case front panel in order to make promotion voice coil loudspeaker voice coil and magnet steel thereof be unlikely to block liquid crystal display screen.
The invention has the beneficial effects as follows: the transparent sounding medium of driven plate loud speaker can make its pronunciation board conceal and not have type, so do not need additionally to take the surface area of product, very be beneficial to it at the liquid crystal flat-panel television set, band liquid crystal display screen mobile phone etc. has simultaneously in the household electrical appliance of video and audio-frequency function and is extensive use of, it is thinner that it not only makes this series products have, the profile of fashion more, and because the sounding media area is big, conduct vibrations is good, and the sounding face and the doubling of the image, so make the range of its product wideer, tone color is more beautiful, and positive acoustic pressure improves greatly, the sound spectrogram location is more accurate.In addition, this loud speaker is highly suitable for also that bank counter, prison presence chamber etc. can not hinder vision and the sense of hearing but the occasion that will isolate is mutually used.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a cross section of the present invention structural map.
Fig. 2 promotes voice coil loudspeaker voice coil and reinforcement bonding location figure.
1. casing transparent panels among Fig. 1 2. promote voice coil loudspeaker voice coil, 3. magnet steel, 4. cushion, 5. magnet steel strutting piece, 6. frame, 7. elastic foam glue, 8. frame type aluminium matter reinforcement before the casing.
Specific embodiment
With 22 inches liquid crystal flat-panel television sets is that example illustrates the selection of transparent sounding medium driven plate loud speaker pronunciation board and the installation method of loud speaker.
22 inches liquid crystal flat-panel TV shell front panel size 502mm * 382mm, two sound channels and monophonic audio electric output powers are that 5W, acoustic pressure index are that 84dB, range index are 125-7000Hz.This example selects for use polymethyl methacrylate to make the sounding dielectric material.
The particular factor k that derives simple and easy empirical Calculation formula through test is 17mmdB/w, and the service condition of formula is: the audio-frequency electric power output is that the area of 5W, loud speaker pronunciation board is at 0.1-0.2m
2Between.
Can determine that according to this TV shell front panel size the area of driven plate loud speaker pronunciation board is 500m m * 380mm, is 0.19m
2Because this television set monophonic audio electric output power is 5W, the area of loud speaker pronunciation board is at 0.1-0.2m
2Between, meet the service condition of the simple and easy empirical Calculation formula of the present invention.The simple and easy empirical equation of value substitution with acoustic pressure index 84dB, audio-frequency electric power output 5w and the k of this television set calculates the material thickness that uses polymethyl methacrylate and is 1mm.After tested, the acoustic pressure index is closed symbol requirement, range index well beyond index request, and only certain frequency has the distortion of cutting apart.This example needn't be changed selected dielectric material, only produce to increase by one 5 * 2mm, thick 0.5mm angle aluminium reinforcement, just in time reduces some acoustic pressures slightly, and has eliminated and cut apart distortion.This routine installation method is as scheming:
Casing transparent panel (1) is bonded on the TV set front frame (6) by elastic foam glue (7) among Fig. 1; The promotion voice coil loudspeaker voice coil (2) of driven plate loud speaker directly is bonded on the casing transparent panel (1) by powerful viscose glue, and is to be bonded at its lower edge; Magnet steel strutting piece (5) is fastened on the preceding frame (6) of casing, and supports the magnet steel (3) of driven plate loud speaker by cushion (4); Reinforcement (8) tightly is bonded at casing transparent panel (1) transparency window edge.
Fig. 2 has represented that promotion voice coil loudspeaker voice coil (2) and frame type aluminium matter reinforcement (8) are bonded at the position on the casing transparent panel (1).
Claims (11)
1. transparent sounding medium driven plate loud speaker, its magnet steel is installed a voice coil loudspeaker voice coil, promote sounding medium sounding by voice coil loudspeaker voice coil, it is characterized in that: the pronunciation board of this loud speaker adopts glass or transparent dielectric materials such as polymethyl methacrylate or transparent PC to make, and also comprises the definite method of employing of material, area, thickness and reinforcement of this loud speaker transparent medium pronunciation board that the present invention proposes and the installation method of this loud speaker simultaneously.
2. a kind of transparent sounding medium driven plate loud speaker according to claim 1 is characterized in that definite method of employing of material, area, thickness and the reinforcement of transparent medium pronunciation board is: by the maximum area of the surface area decision sounding medium of products such as liquid crystal TV set, band liquid crystal display screen mobile phone; Determine the thickness of material by the audio sound forcing up the targets of set audio frequency electromotive power output of product and product needed; Under the situation of set area and set thickness, check and cut apart distortion and range width situation.
3. a kind of transparent sounding medium driven plate loud speaker according to claim 2 is characterized in that and can overcome the distortion of cutting apart of pronunciation board with the way that increases material thickness or use reinforcement to increase material stiffness.
4. a kind of transparent sounding medium driven plate loud speaker according to claim 3 is characterized in that eliminating the frame type aluminium matter reinforcement of cutting apart distortion and tightly is bonded at casing transparent panel transparency window edge.
5. a kind of transparent sounding medium driven plate loud speaker according to claim 2, it is characterized in that can be with reelecting material or adjusting the way of the frequency characteristic of electrical output signal, the frequency characteristic defective of compensation pronunciation material.
6. a kind of transparent sounding medium driven plate loud speaker according to claim 2, the definite method that it is characterized in that the material thickness of transparent medium pronunciation board has simple and easy empirical Calculation formula: a material thickness=k * audio-frequency electric power output/acoustic pressure, wherein: k is a particular factor, determines its value by specific products, certain material; Acoustic pressure is the acoustic pressure index dB number of product; The audio-frequency electric power output is the audio-frequency electric power output w number of a sound channel of product; Set audio-frequency electric power output and certain pronunciation board area are the service conditions of this formula.
7. a kind of transparent sounding medium driven plate loud speaker according to claim 6, it is characterized in that the derivation method of determining the simple and easy empirical Calculation formula of transparent medium pronunciation board material thickness is: under the condition of a certain audio-frequency electric power output, the a certain material thickness of getting the suitable a certain material of product is as the unit root thickness, increase the area of this kind material from small to large, and the sound pressure level when writing down all different area, when material area increases, and the sound pressure level increase is very little even when not increasing substantially, acoustic pressure and material area just are saturation condition, and the usable range of the material area during this state is exactly the service condition of formula; And at this moment the dB number of acoustic pressure is exactly the value of k divided by the value of the w number of power.
8. a kind of transparent sounding medium driven plate loud speaker according to claim 1, the promotion voice coil loudspeaker voice coil that it is characterized in that this loud speaker directly adheres on the front panel of products such as the liquid crystal TV set made with glass or polymethyl methacrylate or transparent PC or other transparent material or band liquid crystal display screen mobile phone, makes the front panel of this product become the pronunciation board of driven plate loud speaker simultaneously.
9. a kind of transparent sounding medium driven plate loud speaker according to claim 8, it is characterized in that this loud speaker promotes edge, especially lower edge that voice coil loudspeaker voice coil directly adheres to the front panel of products such as the liquid crystal TV set made with glass or polymethyl methacrylate or transparent PC or other transparent material or band liquid crystal display screen mobile phone.
10. a kind of transparent sounding medium driven plate loud speaker according to claim 1 is characterized in that the while is fixed on the preceding frame of product by elastomeric material as the product front panel of driven plate loud speaker pronunciation board.
11. a kind of transparent sounding medium driven plate loud speaker according to claim 1 is characterized in that the magnet steel of this loud speaker is fixed on the magnet steel strutting piece by a cushion, this magnet steel strutting piece is fastened on the product case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101548301A CN102209286A (en) | 2010-03-30 | 2010-03-30 | Electrodynamic flat panel loudspeaker using transparent sound production medium and realization method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101548301A CN102209286A (en) | 2010-03-30 | 2010-03-30 | Electrodynamic flat panel loudspeaker using transparent sound production medium and realization method thereof |
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| CN102209286A true CN102209286A (en) | 2011-10-05 |
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| CN2010101548301A Pending CN102209286A (en) | 2010-03-30 | 2010-03-30 | Electrodynamic flat panel loudspeaker using transparent sound production medium and realization method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946577A (en) * | 2012-11-21 | 2013-02-27 | 宁波市环球宇斯浦电器有限公司 | Liquid crystal television bass boost system |
| CN103118316A (en) * | 2012-10-25 | 2013-05-22 | 青岛海信电器股份有限公司 | Electronic equipment with speaker box and panel television set |
| CN108462917A (en) * | 2018-03-30 | 2018-08-28 | 四川长虹电器股份有限公司 | Electromagnetic excitation energy converter and laser projection optics sound equipment screen and its synchronous display method |
| CN109561374A (en) * | 2017-09-27 | 2019-04-02 | 乐金显示有限公司 | Display device |
| CN109788414A (en) * | 2016-07-01 | 2019-05-21 | 张玲花 | Line holographic projections formula audio-video integrated equipment |
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| JP2000358290A (en) * | 1999-06-15 | 2000-12-26 | Nec Corp | Panel speaker |
| CN1402590A (en) * | 2001-08-29 | 2003-03-12 | 金大仁 | Transparent flat loudspeaker and mfg. method thereof |
| US20040190746A1 (en) * | 2001-07-09 | 2004-09-30 | Hideki Seki | Speaker device |
| EP1672956A1 (en) * | 2003-10-06 | 2006-06-21 | Matsushita Electric Industrial Co., Ltd. | Speaker system, speaker module, and electronic devices employing the same |
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| CN1051654A (en) * | 1990-11-27 | 1991-05-22 | 樊兆伟 | Crystal speaker and manufacture method thereof |
| JP2000358290A (en) * | 1999-06-15 | 2000-12-26 | Nec Corp | Panel speaker |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103118316A (en) * | 2012-10-25 | 2013-05-22 | 青岛海信电器股份有限公司 | Electronic equipment with speaker box and panel television set |
| CN103118316B (en) * | 2012-10-25 | 2016-01-20 | 青岛海信电器股份有限公司 | There is electronic equipment and the panel TV set of sound equipment |
| CN102946577A (en) * | 2012-11-21 | 2013-02-27 | 宁波市环球宇斯浦电器有限公司 | Liquid crystal television bass boost system |
| CN109788414A (en) * | 2016-07-01 | 2019-05-21 | 张玲花 | Line holographic projections formula audio-video integrated equipment |
| CN109788414B (en) * | 2016-07-01 | 2020-12-01 | 深圳市新无界科技有限公司 | Working method of projection type audio and video integrated equipment |
| CN109561374A (en) * | 2017-09-27 | 2019-04-02 | 乐金显示有限公司 | Display device |
| CN109561374B (en) * | 2017-09-27 | 2021-07-02 | 乐金显示有限公司 | Display device |
| US11134343B2 (en) | 2017-09-27 | 2021-09-28 | Lg Display Co., Ltd. | Display apparatus |
| CN108462917A (en) * | 2018-03-30 | 2018-08-28 | 四川长虹电器股份有限公司 | Electromagnetic excitation energy converter and laser projection optics sound equipment screen and its synchronous display method |
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Application publication date: 20111005 |