CN102487475A - Piezoelectric ceramic fiber composite thin type horn and manufacturing method thereof - Google Patents
Piezoelectric ceramic fiber composite thin type horn and manufacturing method thereof Download PDFInfo
- Publication number
- CN102487475A CN102487475A CN2010105933952A CN201010593395A CN102487475A CN 102487475 A CN102487475 A CN 102487475A CN 2010105933952 A CN2010105933952 A CN 2010105933952A CN 201010593395 A CN201010593395 A CN 201010593395A CN 102487475 A CN102487475 A CN 102487475A
- Authority
- CN
- China
- Prior art keywords
- piezoelectric ceramic
- ceramic fibers
- thin type
- compound thin
- type horn
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 176
- 239000000835 fiber Substances 0.000 title claims abstract description 161
- 239000002131 composite material Substances 0.000 title claims abstract description 90
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000000084 colloidal system Substances 0.000 claims abstract description 24
- 239000002023 wood Substances 0.000 claims description 72
- 150000001875 compounds Chemical class 0.000 claims description 57
- 238000004132 cross linking Methods 0.000 claims description 20
- 239000004642 Polyimide Chemical group 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 229920001721 polyimide Chemical group 0.000 claims description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 9
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 238000013459 approach Methods 0.000 claims description 8
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 7
- -1 acryl Chemical group 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 239000011777 magnesium Substances 0.000 claims description 6
- 239000010955 niobium Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000011135 tin Substances 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000010931 gold Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 229910052788 barium Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 229910052763 palladium Inorganic materials 0.000 claims description 4
- 229920001568 phenolic resin Polymers 0.000 claims description 4
- 239000005011 phenolic resin Substances 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 229910052712 strontium Inorganic materials 0.000 claims description 4
- 229910052718 tin Inorganic materials 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 238000007639 printing Methods 0.000 claims description 3
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical group [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical group [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims 1
- 230000004044 response Effects 0.000 description 27
- 239000010410 layer Substances 0.000 description 18
- 238000007792 addition Methods 0.000 description 13
- 230000010355 oscillation Effects 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 230000008859 change Effects 0.000 description 5
- 239000011572 manganese Substances 0.000 description 5
- 239000004417 polycarbonate Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000002355 dual-layer Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 208000034189 Sclerosis Diseases 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 2
- 239000010944 silver (metal) Substances 0.000 description 2
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 241001274660 Modulus Species 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
The invention discloses a piezoelectric ceramic fiber composite thin type horn and a manufacturing method thereof. The loudspeaker comprises at least one vibrating diaphragm and a piezoelectric ceramic fiber composite actuator consisting of cross-linked cured colloid and a plurality of piezoelectric units. The vibrating diaphragm is positioned on one side or two sides of the piezoelectric ceramic fiber composite actuator. The thin wide-range loudspeaker has high sound pressure potential at low sound frequency and has the characteristics of ultra-thin and low distortion degree when extending to high sound frequency. Therefore, the piezoelectric ceramic fiber composite thin horn is excellent in sound quality, wide sound range and microstructure.
Description
Technical field
The present invention relates to a kind of thin type horn (thin speaker), and particularly relate to a kind of tool music quality (acoustics) but, piezoelectric ceramic fibers compound (the piezoelectric ceramic fiber composite) thin type horn (thin speaker) that promotes of the adjustment control of wide range frequency and LF-response.
Background technology
Sound and image are electronic equipment and user's main communication media, especially in the part of sound, to such an extent as to by products such as film and television, broadcast receiver, walkman wisdom mobile phones, high-quality image and voice output are the technical development important directions always.Especially along with Portable wisdom electronic product function is constantly brought forth new ideas, continue to dwindle under the trend of attenuate loss of weight, more pay attention to audio-visual output quality requirement in the product appearance size.Yet; The progress of science and technology partly has significant progress at show image; But it is limited to be subject to consumer Portable wisdom electronic product overall dimensions space; High-quality loudspeaker oversize, can only in build the electroacoustic component of voice use or relatively poor voice output, can't reach the quality requirements of playing back music.High-quality sound or music then still need rely on the wide range effect that external loudspeaker obtains 0.2～20kHz.
The manner of execution of loudspeaker generally is to use and comprises three kinds of moving-coil, piezoelectricity and static (or claiming electret) etc.Wherein " piezoelectric type loudspeaker " are to use piezoelectric ceramic thin sheet as dynamo-electric conversion source, when extra electric field, can drive piezoelectric ceramic thin sheet and produce mechanical deformation, drive vibrating diaphragm and make its sounding.Piezoelectric is the high ceramic material of rigidity; Be unfavorable for low range performance in conjunction with the vibration that produces behind the vibrating diaphragm; Therefore some patent is structurally to design; The object that makes it utilize external platform or have a volume reaches the improvement of low range as audio amplifier, but it belongs to portable type external mounted horn designs, can't be incorporated into slim electronic product.
In addition, though can being reduced by piezoelectric ceramic thickness, the piezoelectric type loudspeaker improve the bass domain response, like U.S. Pat 7596235.But be subject to pottery and be prone to crisp characteristic; Be difficult for making the piezoelectric ceramic thin sheet that thickness enough approaches, therefore development at present has the sandwich construction of use to improve the easy crisp problem of potsherd, like U.S. Patent Publication US20030099371; Though its sound press can increase because of the superposition of multilayer; But the improvement to the bass domain response is still not enough, and its low range generally still just has enough responses about 1kHz, and the performance of low range still has the suitable space of improving.
In addition; Because the rigidity that reduces piezoelectric ceramic can be improved the characteristic of bass; So also have patent such as U.S. Patent Publication US20100150381 be to use polyvinylidene fluoride (polyvinylidenedifluoride, PVDF) and lead zirconate titanate (PZT) the ceramic powder scraper film forming again of mixing, but tradition is mixed the composite material of formation with piezoelectric ceramic powder with resin; Though have low rigidity but to lose the dynamo-electric transfer characteristic of piezoelectric, cause the reduction of output volume.
Summary of the invention
The object of the present invention is to provide the compound thin type horn of a kind of piezoelectric ceramic fibers, but can improve music quality frequency adjustment control and promote LF-response.
Another purpose of the present invention is to provide the manufacturing approach of the compound thin type horn of a kind of piezoelectric ceramic fibers, can simpler production go out good, the wide range of tonequality and be fit to microminiaturized thin type horn.
For reaching above-mentioned purpose; The present invention proposes the compound thin type horn of a kind of piezoelectric ceramic fibers, comprises the piezoelectric ceramic fibers composite wood actuator (actuator) and at least one vibrating diaphragm (vibration film) that are made up of crosslinking curing colloid and a plurality of piezoelectric unit (element).Above-mentioned vibrating diaphragm is the single or double that is positioned at piezoelectric ceramic fibers composite wood actuator.
In one embodiment of this invention; The young's modulus of above-mentioned piezoelectric ceramic fibers composite wood actuator (Young ' s modulus) scope is 0.1GPa～10Gpa; Preferably 3GPa to 5GPa, actuator still need the rigidity of certain intensity could mechanical energy effectively be passed to vibrating diaphragm.
In one embodiment of this invention, the young's modulus scope of above-mentioned vibrating diaphragm is 0.1GPa～3.5GPa, preferably 2GPa to 3.5GPa.
In one embodiment of this invention, each piezoelectric unit is a piezoelectric ceramic fibers.And the composition of piezoelectric ceramic fibers is as being expressed as ABO
3, wherein A represents plumbous (Pb), barium (Ba), lanthanum (La), strontium (Sr), potassium (K) or lithium (Li); B represents titanium (Ti), zirconium (Zr), manganese (Mn), cobalt (Co), niobium (Nb), iron (Fe), zinc (Zn), magnesium (Mg), yttrium (Y), tin (Sn), nickel (Ni) or tungsten (W).The wire range of above-mentioned piezoelectric ceramic fibers is 20 μ m～1000 μ m, preferably 100 μ m to 300 μ m.The addition scope of piezoelectric ceramic fibers is 60vol%～92vol%, and preferable addition is that 80vol% is above to 92vol%.
In one embodiment of this invention, the area of above-mentioned piezoelectric ceramic fibers composite wood actuator is 0.5cm
2～25cm
2, preferable composite wood actuator area is 5cm
2More than to 25cm
2
In one embodiment of this invention, the thickness range of above-mentioned piezoelectric ceramic fibers composite wood actuator is 30 μ m～300 μ m, preferably 70 μ m to 120 μ m.
In one embodiment of this invention, above-mentioned crosslinking curing colloid is to be selected to comprise that epoxy resin resin, acryl are a kind of polymer in the group that forms of resin and phenolic resins.
In one embodiment of this invention, above-mentioned piezoelectric ceramic fibers composite wood actuator is circle, ellipse or rectangle.
In one embodiment of this invention, above-mentioned vibrating diaphragm also comprises electrode layer, and wherein the material of electrode layer comprises gold (Au), platinum (Pt), silver (Ag), silver-colored palladium (Ag-Pd), aluminium (Al) or copper (Cu).The thickness range of electrode layer is 0.1 μ m～10 μ m, preferably 0.5 μ m～1 μ m.
In one embodiment of this invention; Above-mentioned vibrating diaphragm is to be selected to comprise Merlon (polycarbonate; PC), (polyethylene terephthalate is PET) with polyimides (polyimide, a kind of material in the group that PI) is formed for PETG.
In one embodiment of this invention, the thickness range of above-mentioned vibrating diaphragm is 15 μ m～150 μ m, and preferably 100 μ m are with down to 15 μ m.
In one embodiment of this invention, above-mentioned vibrating diaphragm is shaped as circle or rectangle.
In one embodiment of this invention, the areal extent of above-mentioned vibrating diaphragm is 1cm
2～250cm
2, the ratio of vibrating diaphragm area and actuator area has preferable sound field performance about 2～5, and the preferable areal extent of vibrating diaphragm is 10cm
2～125cm
2
The present invention proposes the manufacturing approach of the compound thin type horn of a kind of piezoelectric ceramic fibers in addition; Comprise and earlier piezoelectric ceramic fibers is arranged boundling; Again with crosslinking curing colloid bonding piezoelectric ceramic fibers and solidify said crosslinking curing colloid, and form a piezoelectric ceramic fibers composite material.Then, cutting piezoelectric ceramic fibers composite material is to obtain several composite wood thin slices.Then, polarization composite wood thin slice is as piezoelectric ceramic fibers composite wood actuator, again in the single or double applying vibrating diaphragm of piezoelectric ceramic fibers composite wood actuator.
In another embodiment of the present invention, the step of cutting above-mentioned piezoelectric ceramic fibers composite material comprises with the angle of vertical piezoelectric ceramic fibers cuts.
In another embodiment of the present invention, the surface that before the applying vibrating diaphragm, also can be included in vibrating diaphragm forms electrode layer.
In another embodiment of the present invention, the method that forms above-mentioned electrode layer comprises vacuum splashing and plating or printing.
Based on above-mentioned; The present invention with the piezoelectric ceramic fibers composite material as actuator; So slim piezoelectricity composite wood loudspeaker bass (200～1kHz) just have high response (＞90dB) and may extend to high audio (～20kHz); And because simple in structure, ultra-thin (＜0.5mm), so easy and portable product integration.Can also obtain the effect of low distortion (distortion rate) (～10%) through test.Therefore, loudspeaker of the present invention no matter with regard to tonequality (acoustics characteristic) or volume all than conventional piezoelectric ceramic horn (piezoelectric speaker) excellence, and driving voltage is low.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and cooperates appended accompanying drawing to elaborate as follows.
Description of drawings
Fig. 1 is the perspective view that the present invention accordings to the compound thin type horn of a kind of piezoelectric ceramic fibers of an embodiment;
Fig. 2 is the variation of Fig. 1;
Fig. 3 is the perspective view that the present invention accordings to the compound thin type horn of a kind of piezoelectric ceramic fibers of another embodiment;
Fig. 4 A is respectively the stereogram of two kinds of different piezoelectric ceramic fibers composite wood actuators of the present invention with Fig. 4 B;
Fig. 5 is the manufacturing process block diagram that the present invention accordings to the compound thin type horn of a kind of piezoelectric ceramic fibers of another embodiment;
Fig. 6 is the acoustic frequency response curve chart of loudspeaker of the different piezoelectric ceramic fibers additions of instance one of the present invention;
Fig. 7 is the total harmonic distortion curve chart of loudspeaker of the different piezoelectric ceramic fibers additions of instance one of the present invention;
Fig. 8 is the acoustic frequency response curve chart of the compound thin type horn of piezoelectric ceramic fibers of the different upper and lower vibrating diaphragm area ratio of instance two of the present invention;
Fig. 9 is the total harmonic distortion curve chart of the compound thin type horn of piezoelectric ceramic fibers of the different upper and lower vibrating diaphragm area ratio of instance two of the present invention;
Figure 10 is the different upper and lower vibrating diaphragm area ratio and the curve chart that plays vibration frequency and acoustic frequency response of instance three of the present invention;
Figure 11 is the acoustic frequency response curve chart of the compound thin type horn of piezoelectric ceramic fibers of the different upper and lower vibrating diaphragm area ratio of instance four of the present invention;
Figure 12 is the vibrating diaphragm thickness ratio of instance six of the present invention and the graph of a relation of sound press response current potential;
Figure 13 is the actuator thickness of instance seven of the present invention and the graph of a relation of sound press response current potential.
The main element symbol description
100,300: the compound thin type horn of piezoelectric ceramic fibers
102,302,304: vibrating diaphragm
104: piezoelectric ceramic fibers composite wood actuator
106,400: the crosslinking curing colloid
108: piezoelectric unit
110: electrode layer
402: the piezoelectric ceramic ball
404: piezoelectric ceramics block
S500～S508: step
Embodiment
Fig. 1 is the perspective view according to the compound thin type horn of a kind of piezoelectric ceramic fibers of an embodiment.
Please with reference to Fig. 1, the compound thin type horn 100 of the piezoelectric ceramic fibers of present embodiment comprises a vibrating diaphragm 102 and a piezoelectric ceramic fibers composite wood actuator 104.Wherein the young's modulus scope of piezoelectric ceramic fibers composite wood actuator 104 for example is 0.1GPa～10GPa; Preferably 3GPa to 5GPa; And the position is at the young's modulus scope of the vibrating diaphragm 102 of piezoelectric ceramic fibers composite wood actuator 104 single faces for example 0.1GPa～3.5GPa, preferably 2GPa to 3.5GPa.Above-mentioned piezoelectric ceramic fibers composite wood actuator 104 is to be made up of crosslinking curing colloid 106 and several piezoelectric units (element) 108, and wherein each piezoelectric unit 108 is a piezoelectric ceramic fibers, and its composition is as being expressed as ABO
3, then A represents elements such as Pb, Ba, La, Sr, K, Li; B represents Ti, Zr, Mn, Co, Nb, Fe, Zn, Mg, Y, Sn, Ni, elements such as w.Because when the ratio of ceramic phase is higher in the piezo-electric ceramic composite material; It is about more than 10% that its electromechanical conversion efficiency can be higher than the total head electroceramics material; So the addition of piezoelectric ceramic fibers can be 60vol%～92vol%; Preferably 80vol%～92vol% is to obtain better electromechanical conversion efficiency, lower rigidity and mass ratio.The wire range of above-mentioned piezoelectric ceramic fibers is 20 μ m～1000 μ m, preferably 100 μ m to 300 μ m for example.For example be selected from as for 106 in crosslinking curing colloid and comprise that epoxy resin (epoxy) is that resin, acryl (acrylic) are a kind of polymer in the group that formed of resin and phenolic resins (novolakresin).
Please continue with reference to Fig. 1, the area of the piezoelectric ceramic fibers composite wood actuator 104 in the present embodiment is for example at 0.5cm
2～25cm
2Between, for example between 30 μ m～300 μ m, preferably area is at 5cm for thickness range
2～25cm
2, thickness range is between 70 μ m to the 120 μ m.And vibrating diaphragm 102 can be and comprises the organic of two or more different young's moduluses or the composite wood that organic-inorganic blendes together; As be selected from and comprise Merlon (polycarbonate; PC), PETG (polyethylene terephthalate; PET) with polyimides (polyimide, a kind of material in the group that PI) is formed.In addition, the thickness range of vibrating diaphragm 102 for example between 15 μ m～150 μ m, areal extent is for example at 1cm
2～250cm
2Between, preferable vibrating diaphragm 102 thickness have preferable sound field performance at the ratio of 15 μ m～100 μ m, vibrating diaphragm 102 areas and actuator 104 areas about 2～5, and preferable vibrating diaphragm 102 areal extents are for example at 10cm
2～125cm
2Between.In addition, on the attaching face of vibrating diaphragm 102 and piezoelectric ceramic fibers composite wood actuator 104 and opposite face, also can comprise electrode layer 110, its material comprises Au, Pt, Ag, Ag-Pd, Al, Cu etc.For example between 0.1 μ m～10 μ m, preferable electrode layer 110 thickness ranges are between 0.5 μ m～1 μ m for the thickness range of electrode layer 110.
In Fig. 1, piezoelectric ceramic fibers composite wood actuator 104 is a rectangle; The shape of vibrating diaphragm 102 also is a rectangle.But the present invention is not limited to this, and the piezoelectric ceramic fibers composite wood actuator 104 of present embodiment can also be circular (like Fig. 2) or ellipse.Likewise, the shape of vibrating diaphragm 102 can also be circular (like Fig. 2) or other shape, and the shape of vibrating diaphragm 102 and piezoelectric ceramic fibers composite wood actuator 104 can be identical or different.
Fig. 3 is the perspective view according to the compound thin type horn of a kind of piezoelectric ceramic fibers of another embodiment, wherein uses and represents identical member with Fig. 1 components identical symbol.
Please with reference to Fig. 3, the compound thin type horn 300 of the piezoelectric ceramic fibers of present embodiment also has the position at piezoelectric ceramic fibers composite wood actuator 104 two-sided first vibrating diaphragm 302 and second vibrating diaphragm 304 except that piezoelectric ceramic fibers composite wood actuator 104.Wherein, material, thickness and the area etc. of first vibrating diaphragm 302 and second vibrating diaphragm 304 all can be with reference to the embodiment of Fig. 1.
In above-mentioned each figure, piezoelectric ceramic fibers composite wood actuator 104 is the composite woods that belong to 1 (piezoelectric ceramic fibers)-3 (sclerosis colloid) structure; That is to say; Piezoelectric unit 108 (piezoelectric ceramic fibers) wherein has same direction and arranges; 106 bags of crosslinking curing colloid invest between the piezoelectric unit 108, that is the piezoelectric ceramic fibers of organic material bonding isotropism arrangement, to reach the composite wood of high ceramic phase (＞60%).Therefore, except that the accompanying drawing of the foregoing description, Fig. 4 A and Fig. 4 B can be applicable to piezoelectric ceramic fibers composite wood actuator 104.Fig. 4 A is the composite wood that is made up of crosslinking curing colloid 400 and piezoelectric ceramic ball (spheres) 402.Fig. 4 B is the composite wood that is made up of crosslinking curing colloid 400 and piezoelectric ceramics block (dices) 404.Except that the composite wood of the 1-3 structure shown in the figure, the present invention should use the composite wood of other types, is not limited to this.
Fig. 5 is the manufacturing process block diagram according to the compound thin type horn of a kind of piezoelectric ceramic fibers of another embodiment.
Please with reference to Fig. 5, at first in step S500, piezoelectric ceramic fibers is arranged boundling, the composition of wherein used piezoelectric ceramic fibers is as being expressed as ABO
3, then A represents plumbous (Pb), barium (Ba), lanthanum (La), strontium (Sr), potassium (K) or lithium (Li); B represents titanium (Ti), zirconium (Zr), manganese (Mn), cobalt (Co), niobium (Nb), iron (Fe), zinc (Zn), magnesium (Mg), yttrium (Y), tin (Sn), nickel (Ni) or tungsten (W).Line footpath about 20 μ m～1000 μ m, preferably 100 μ m to the 300 μ m of above-mentioned piezoelectric ceramic fibers.
Then, in step S502,, and form a piezoelectric ceramic fibers composite material of low young's modulus (about 0.1GPa～10Gpa, preferably 3GPa to 5GPa) with bond above-mentioned piezoelectric ceramic fibers and solidify said crosslinking curing colloid of a crosslinking curing colloid.Said crosslinking curing colloid for example is to be selected to comprise that epoxy resin resin, acryl are a kind of polymer in the group that forms of resin and phenolic resins.And compare with the volume of piezoelectric ceramic fibers with the crosslinking curing colloid, the about 60vol%～92vol% of the addition of piezoelectric ceramic fibers, preferably 80vol% is above to 92vol%.
Then, cutting piezoelectric ceramic fibers composite material in step S504 is to obtain several composite wood thin slices.In the present embodiment, step S504 cuts with the angle of vertical piezoelectric ceramic fibers.After step S504, also can grind the composite wood thin slice, to obtain thinner or meticulousr shape.
Afterwards, polarization composite wood thin slice in step S506, with it as piezoelectric ceramic fibers composite wood actuator.
Then, in step S508 in the single or double applying vibrating diaphragm of piezoelectric ceramic fibers composite wood actuator, the wherein about 0.1GPa～3.5GPa of the young's modulus of vibrating diaphragm, preferably 2GPa to 3.5GPa.Vibrating diaphragm for example is selected from a kind of material that comprises in the group that Merlon (PC), PETG (PET) and polyimides (PI) formed.In addition, also can form electrode layer earlier on the surface of vibrating diaphragm before the step S508, its method is vacuum splashing and plating or printing for example.The material of above-mentioned electrode layer is Au, Pt, Ag, Ag-Pd, Al or Cu for example.
Below enumerate several experiments and verify effect of the present invention.
Instance one
At first, make the composite wood rod of different piezoelectric ceramic fibers additions, comprise the composite wood that the piezoelectric ceramic fibers addition is 53vol%, 72vol%, 80vol% and 85vol%
Production method is to be 5cm with inserting area behind the piezoelectric ceramic fibers boundling earlier
2Mould in, the line of used piezoelectric ceramic fibers directly is 250 μ m, its length is 10cm.Then; Modulate suitable hardenable crosslinking curing colloid; After using epoxy resin to insert in the mould, impose centrifugal and pump step here, treat to obtain having the inorganic ceramic of piezoelectric ceramic fibers isotropism arrangement and the composite wood of organic colloid after the colloid sclerosis demoulding.Then, cut above-mentioned composite wood and polarization obtains ultra-thin piezoelectricity composite wood thin slice as the actuator that drives Loudspeaker diaphragm with the angle of vertical fibers, the thickness of piezoelectric ceramic fibers composite wood actuator is that 70 μ m, area are fixed as 5cm
2
In addition, prepare a traditional total head electroceramics actuator, its area is 5cm
2, thickness is 70 μ m.
Then, measure the composite wood characteristic of above sample, the result is shown in following table one.In table one, the young's modulus (Y of piezoelectric ceramic fibers composite wood actuator
33) obviously than little 2～3 one magnitude of value of traditional total head electroceramics.
Table one
Then, on these piezoelectric ceramic fibers composite wood actuators, attach the single-layer PET vibrating diaphragm and come the testing audio response.Wherein, PET vibrating diaphragm area is fixed as 25cm
2, thickness is 100 μ m.Whole loudspeaker contain frame thickness and are about 0.5mm.The acoustic frequency response result is as shown in Figure 6, and test condition is 15V-10cm.
Can know that from Fig. 6 the piezoelectric ceramic fibers composite wood actuator of different piezoelectric ceramic fibers additions attaches the loudspeaker starting of oscillation frequency f of individual layer vibrating diaphragm
0About 200～215Hz, and sound press response current potential (soundpressure level, S.P.L.) with the increase that is directly proportional of piezoelectric ceramic fibers addition increase in the composite wood, when the piezoelectric ceramic fibers addition is up to 85% in the composite wood, the starting of oscillation frequency f
0Response reach 105dB.
And (total harmonic distortion, result THD) is shown in Fig. 7 to total harmonic distortion, wherein is presented at audible frequency range (200Hz～10kHz) many below 10%.
Instance two
With piezoelectric ceramic fibers addition in the table one be 85% piezoelectric ceramic fibers composite wood as actuator, then at its two-sided one deck vibrating diaphragm that respectively attaches, two-layer vibrating diaphragm central authorities except with the composite wood thin slice then, its complementary space of two-layer vibrating diaphragm is independent separately.The attaching mask of vibrating diaphragm has electrode layer, constitutes like the compound thin type horn of the piezoelectric ceramic fibers of Fig. 3 with the fixed structure frame fixation around the vibrating diaphragm.Wherein, following vibrating diaphragm is that PET film, the area of thickness 100 μ m is fixed as 25cm
2Last vibrating diaphragm is that Kapton (PI) film, the area of thickness 25 μ m then is respectively 20cm
2, 12.5cm
2And 6.25cm
2(upward vibrating diaphragm is respectively 0.8,0.5 and 0.25 with the area ratio of following vibrating diaphragm).Whole loudspeaker contain frame thickness and are about 0.5mm, and test condition is 15V-10cm.
Along with the change of last vibrating diaphragm area, measure the influence of the acoustic frequency response of different loudspeaker.The result shown in Fig. 8, the loudspeaker starting of oscillation frequency f of piezoelectric ceramic fibers composite wood applying Dual-layer oscillation membrane
0About 230Hz, response reaches 95dB; And a resonance frequency f is arranged also about 350Hz
0', respond and be 93dB.The result shows and adopts the independent Dual-layer oscillation membrane single piezoelectricity composite wood thin slice mode of fitting have at low range and independently play vibration frequency separately.
Result as for total harmonic distortion (THD) is shown in Fig. 9, wherein is presented at audible frequency range (200Hz～10kHz) equally mostly below 10%.
No matter can be obtained by instance one and instance two, be individual layer vibrating diaphragm or Dual-layer oscillation membrane, uses the loudspeaker starting of oscillation frequency f of piezoelectric ceramic fibers composite wood as actuator
0All can hang down about 200Hz～230Hz, response is then at least about 95dB.
Instance three
Except that the size that change the to go up vibrating diaphragm area of vibrating diaphragm and following vibrating diaphragm (go up than), use and play vibration frequency with instance two identical structures with experimental condition research and corresponding sound press responds electric potential relation, the result is shown in Figure 10.
Can know that from Figure 10 than being to play vibration frequency all less than 350Hz before 0.9, response is also more than 90dB at the area of upper and lower two-layer vibrating diaphragm.
Instance four
Except following vibrating diaphragm is the Kapton PI film of thickness 100 μ m, uses with instance two identical structure and experiment conditions and test.The result is shown in figure 11, along with the change of last vibrating diaphragm area, the compound thin type horn of piezoelectric ceramic fibers from the response of 200Hz to 20kHz roughly all more than 90dB.
A vibration frequency of the compound thin type horn of piezoelectric ceramic fibers of above instance one～four is all obviously than total head electroceramics loudspeaker (f
0～1000Hz 95dB, L * W * H are that 30mm * 15mm * 3mm) is for low.The result shows that the thin type horn that uses single piezoelectric ceramic fibers composite wood actuator and combine individual layer or Dual-layer oscillation membrane can obviously reduce the resonance frequency of loudspeaker, and response all maintains more than the 90dB and extends to high range.In addition; Be embedded in Portable in the volume advantage of slimming and microminiaturized (microminiaturized) drive circuit make it to be very easy to and move consumer products; For example mobile phone, mp3 player, personal digital assistant (PDA) or notebook computer can provide the wisdom communication product preferable music quality.
Instance five: flexible checking
With piezoelectric ceramic fibers addition in the table one be 85% piezoelectric ceramic fibers composite wood as sample, wherein used crosslinking curing colloid is an epoxy resin.Measure the flexible angle of the piezoelectric ceramic fibers composite wood of different-thickness then, obtain following table two.Can know to have flexible according to the resulting piezoelectric ceramic fibers actuator of instance from table two.
Table two
| Composite wood thickness (μ m) | Maximum bend angle |
| 220 | 15 |
| 140 | 20 |
| 90 | 45 |
| 70 | 45 |
| 40 | 60 |
Instance six: the vibrating diaphragm thickness proportion is to the influence of sound press response current potential
Area is than the compound thin type horn of piezoelectric ceramic fibers that is 0.8 in the use-case four, and the thickness of vibrating diaphragm is 100 μ m, 50 μ m and 25 μ m but change down, measures the vibration frequency that rises of these three kinds of loudspeaker then earlier, is respectively 230Hz, 275Hz and 286Hz.Then be shown in Figure 12 as for vibrating diaphragm thickness than relation with sound press response current potential (dB).
Instance seven: actuator thickness is to the influence of sound press response current potential
Area is than the compound thin type horn of piezoelectric ceramic fibers that is 0.8 in the use-case four, but actuator thickness is respectively 30 μ m, 70 μ m and 100 μ m, measures the vibration frequency that rises of these three kinds of loudspeaker then earlier, is respectively 315Hz, 230Hz and 372Hz.Relation as for actuator thickness and sound press response current potential (dB) then is shown in Figure 13.
Can know that from the result of above instance six and instance seven response of the compound thin type horn of piezoelectric ceramic fibers can both maintain more than the 90dB.
In sum; The compound thin type horn of piezoelectric ceramic fibers of the present invention has the simple structure and the slimming of piezoelectric speaker concurrently; And the good characteristic of LF-response; Therefore have more competitive advantage than existing loudspeaker, help the product development of the slim toy trumpet of wide range, can effectively solve the problem that present portable electronic product is built music grade loudspeaker in needing badly.
Though disclosed the present invention in conjunction with above embodiment; Yet it is not in order to limit the present invention; Be familiar with this operator in the technical field under any; Do not breaking away from the spirit and scope of the present invention, can do a little change and retouching, thus protection scope of the present invention should with enclose claim was defined is as the criterion.
Claims (31)
1. compound thin type horn of piezoelectric ceramic fibers comprises:
Piezoelectric ceramic fibers composite wood actuator, it is to be made up of a crosslinking curing colloid and most piezoelectric units; And
At least one vibrating diaphragm is positioned at the single or double of this piezoelectric ceramic fibers composite wood actuator.
2. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 1, wherein this piezoelectric ceramic fibers composite wood actuator young's modulus scope is 0.1GPa～10GPa.
3. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 2, wherein this piezoelectric ceramic fibers composite wood actuator young's modulus scope is 3GPa～5GPa.
4. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 1, wherein the young's modulus scope of this at least one vibrating diaphragm is 0.1GPa～3.5GPa.
5. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 4, wherein the young's modulus scope of this at least one vibrating diaphragm is 2GPa～3.5GPa.
6. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 1, wherein each piezoelectric unit is a piezoelectric ceramic fibers.
7. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 6, wherein the component list of this piezoelectric ceramic fibers is shown ABO
3, wherein A represents lead, barium, lanthanum, strontium, potassium or lithium; B represents titanium, zirconium, manganese, cobalt, niobium, iron, zinc, magnesium, yttrium, tin, nickel or tungsten.
8. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 6, wherein the wire range of this piezoelectric ceramic fibers is 20 μ m～1000 μ m.
9. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 8, wherein the wire range of this piezoelectric ceramic fibers is 100 μ m～300 μ m.
10. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 6, wherein the addition scope of this piezoelectric ceramic fibers is 60vol%～92vol%.
11. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 10, wherein the addition scope of this piezoelectric ceramic fibers is 80vol%～92vol%.
12. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 1, wherein the area of this piezoelectric ceramic fibers composite wood actuator is 0.5cm
2～25cm
2
13. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 12, wherein the area of this piezoelectric ceramic fibers composite wood actuator is 5cm
2～25cm
2
14. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 1, wherein the thickness range of this piezoelectric ceramic fibers composite wood actuator is 30 μ m～300 μ m.
15. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 14, wherein the thickness range of this piezoelectric ceramic fibers composite wood actuator is 70 μ m～120 μ m.
16. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 1, wherein this crosslinking curing colloid is to be selected to comprise that epoxy resin resin, acryl are a kind of polymer in the group that forms of resin and phenolic resins.
17. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 1, wherein this piezoelectric ceramic fibers composite wood actuator is circle, ellipse or rectangle.
18. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 1, wherein this vibrating diaphragm also comprises an electrode layer.
19. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 18, wherein the material of this electrode layer comprises gold, platinum, silver, silver-colored palladium, aluminium or copper.
20. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 18, wherein the thickness range of this electrode layer is 0.1 μ m～10 μ m.
21. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 20, wherein the thickness range of this electrode layer is 0.5 μ m～1 μ m.
22. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 1, wherein this at least one vibrating diaphragm is to be selected from a kind of material that comprises in the group that Merlon, PETG and polyimides form.
23. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 1, wherein the thickness range of this at least one vibrating diaphragm is 15 μ m～150 μ m.
24. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 23, wherein the thickness range of this at least one vibrating diaphragm is 15 μ m～100 μ m.
25. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 1, wherein this at least one vibrating diaphragm is shaped as circle or rectangle.
26. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 1, wherein the areal extent of this at least one vibrating diaphragm is 1cm
2～250cm
2
27. the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 26, wherein the areal extent of this at least one vibrating diaphragm is 10cm
2～125cm
2, and the ratio of the area of the area of this at least one vibrating diaphragm and this actuator is 2～5.
28. the manufacturing approach of the compound thin type horn of piezoelectric ceramic fibers is used for making like the compound thin type horn of the arbitrary described piezoelectric ceramic fibers of claim 1～27, this method comprises:
A majority piezoelectric ceramic fibers is arranged boundling;
With those piezoelectric ceramic fibers of crosslinking curing colloid bonding and solidify this crosslinking curing colloid, to form a piezoelectric ceramic fibers composite material;
Cut this piezoelectric ceramic fibers composite material, to obtain most composite wood thin slices;
At least one composite wood thin slice that polarizes is as a piezoelectric ceramic fibers composite wood actuator; And
Single or double applying vibrating diaphragm at this piezoelectric ceramic fibers composite wood actuator.
29. the manufacturing approach of the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 28, the step of wherein cutting this piezoelectric ceramic fibers composite material comprises with the angle of vertical those piezoelectric ceramic fibers cuts.
30. the manufacturing approach of the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 28 also comprises before this vibrating diaphragm of wherein fitting: the surface at this vibrating diaphragm forms electrode layer.
31. the manufacturing approach of the compound thin type horn of piezoelectric ceramic fibers as claimed in claim 30, the method that wherein forms this electrode layer comprises vacuum splashing and plating or printing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW99142399 | 2010-12-06 | ||
| TW099142399A TWI491271B (en) | 2010-12-06 | 2010-12-06 | Thin speaker with piezoelectric ceramic fiber composite and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102487475A true CN102487475A (en) | 2012-06-06 |
Family
ID=46152920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105933952A Pending CN102487475A (en) | 2010-12-06 | 2010-12-17 | Piezoelectric ceramic fiber composite thin type horn and manufacturing method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102487475A (en) |
| TW (1) | TWI491271B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105392091A (en) * | 2016-01-01 | 2016-03-09 | 苏州井利电子股份有限公司 | Fatigue-resistant long-service-life voice coil wire |
| CN105491486A (en) * | 2016-01-01 | 2016-04-13 | 苏州井利电子股份有限公司 | Voice coil wire for loudspeaker |
| US10356511B2 (en) | 2016-05-24 | 2019-07-16 | Dalian University Of Technology | Ultrathin acoustic impedance converter |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103828393B (en) * | 2012-09-21 | 2016-09-14 | 京瓷株式会社 | Sound producer, flexible piezoelectric sound-generating devices and electronic equipment |
| EP3716647B1 (en) * | 2017-11-21 | 2024-01-03 | Nitto Denko Corporation | Laminate body for forming piezoelectric speaker |
| TWI714934B (en) * | 2018-12-25 | 2021-01-01 | 財團法人工業技術研究院 | Ceramic fiber piezoelectric composite material and shoe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020176592A1 (en) * | 2001-05-23 | 2002-11-28 | Howarth Thomas R. | Piezoelectric acoustic actuator |
| CN1512481A (en) * | 2002-10-21 | 2004-07-14 | ��ɣ��˹�������� | Improved transducer |
| US20100158283A1 (en) * | 2008-12-22 | 2010-06-24 | Electronics And Telecommunications Research Institute | Piezoelectric speaker and method of manufacturing the same |
-
2010
- 2010-12-06 TW TW099142399A patent/TWI491271B/en active
- 2010-12-17 CN CN2010105933952A patent/CN102487475A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020176592A1 (en) * | 2001-05-23 | 2002-11-28 | Howarth Thomas R. | Piezoelectric acoustic actuator |
| CN1512481A (en) * | 2002-10-21 | 2004-07-14 | ��ɣ��˹�������� | Improved transducer |
| US20100158283A1 (en) * | 2008-12-22 | 2010-06-24 | Electronics And Telecommunications Research Institute | Piezoelectric speaker and method of manufacturing the same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105392091A (en) * | 2016-01-01 | 2016-03-09 | 苏州井利电子股份有限公司 | Fatigue-resistant long-service-life voice coil wire |
| CN105491486A (en) * | 2016-01-01 | 2016-04-13 | 苏州井利电子股份有限公司 | Voice coil wire for loudspeaker |
| US10356511B2 (en) | 2016-05-24 | 2019-07-16 | Dalian University Of Technology | Ultrathin acoustic impedance converter |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI491271B (en) | 2015-07-01 |
| TW201225685A (en) | 2012-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6042925B2 (en) | Sound generator | |
| CN103959816B (en) | Piezoelectric sounding body and use its electronic equipment | |
| WO2016158518A1 (en) | Electroacoustic transducer | |
| CN102487475A (en) | Piezoelectric ceramic fiber composite thin type horn and manufacturing method thereof | |
| JPWO2013002384A1 (en) | Sound generator and sound generator using the same | |
| TWI558225B (en) | A vibrating device, an acoustic generating device, a speaker system, an electronic device | |
| JP2019501605A (en) | Sound output device | |
| CN101765046A (en) | Nonmetallic vibration film multilayer piezoelectric speaker | |
| US9302292B2 (en) | Piezoelectric electroacoustic transducer | |
| CN104081791B (en) | Sound generator, sound generation device and electronic equipment | |
| JP5676016B2 (en) | Vibration device, sound generator, speaker system, electronic equipment | |
| CN102291657A (en) | bicrystal piezoelectric ceramic loudspeaker | |
| JP6495866B2 (en) | Speaker unit | |
| CN201197186Y (en) | Ultra-thin piezoelectric microphone | |
| JP6567911B2 (en) | SOUND GENERATOR, SOUND GENERATOR HAVING THE SAME, AND ELECTRONIC DEVICE | |
| Kim et al. | Effects of an elastic mass on frequency response characteristics of an ultra-thin piezoelectric micro-acoustic actuator | |
| CN201608894U (en) | Multilayer piezoelectric speaker adopting non-metallic vibrating diaphragm | |
| CN201150129Y (en) | Multilayer piezoelectric loudspeaker | |
| CN212199090U (en) | Flexible polyimide board and sound production device | |
| CN201937819U (en) | Dichotomous driving ultrathin multilayer piezoelectric speaker | |
| JP6418962B2 (en) | Multilayer piezoelectric element, acoustic generator, acoustic generator and electronic device | |
| CN102098612A (en) | Branched driven ultrathin multi-layer piezoelectric loudspeaker | |
| JP2012217037A (en) | Electronic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120606 |