TWI454156B - Electronic device with electret electro-acoustic transducer - Google Patents
Electronic device with electret electro-acoustic transducer Download PDFInfo
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- TWI454156B TWI454156B TW097141921A TW97141921A TWI454156B TW I454156 B TWI454156 B TW I454156B TW 097141921 A TW097141921 A TW 097141921A TW 97141921 A TW97141921 A TW 97141921A TW I454156 B TWI454156 B TW I454156B
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- 125000006850 spacer group Chemical group 0.000 claims description 26
- 239000011358 absorbing material Substances 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000010408 film Substances 0.000 claims 21
- 239000012788 optical film Substances 0.000 claims 5
- 239000003989 dielectric material Substances 0.000 description 8
- 230000003068 static effect Effects 0.000 description 4
- 239000004812 Fluorinated ethylene propylene Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 229920009441 perflouroethylene propylene Polymers 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000012814 acoustic material Substances 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- H04R19/00—Electrostatic transducers
- H04R19/01—Electrostatic transducers characterised by the use of electrets
- H04R19/013—Electrostatic transducers characterised by the use of electrets for loudspeakers
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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
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Telephone Set Structure (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Description
本發明係有關於一種具有電聲致動器之電子裝置，更特別有關於一種具有駐電式電聲致動器之電子裝置。The present invention relates to an electronic device having an electroacoustic actuator, and more particularly to an electronic device having a resident electroacoustic actuator.
揚聲器(loudspeaker)是一種能夠發出聲音之裝置，其發聲之原理是利用電信號來使振膜振動以產生聲音，目前已廣泛地應用在行動電話、個人數位助理器及筆記型電腦等需要發聲之電子裝置上。A loudspeaker (loudspeaker) is a device that emits sound. The principle of sounding is to use an electrical signal to vibrate the diaphragm to generate sound. It has been widely used in mobile phones, personal digital assistants, and notebook computers. On the electronic device.
傳統之揚聲器係為動圈式(dynamic)揚聲器，其係利用磁鐵吸引通電之線圈，來使與線圈連接之振膜產生振動以發出聲音。然而，上述之動圈式揚聲器雖可產生很好的音質，但其因音腔需要佔有一定的空間，厚度始終無法縮小，當應用在行動電話、個人數位助理器及筆記型電腦等可攜式電子裝置上時，該產品之厚度便無法縮小。The conventional speaker is a dynamic speaker that attracts a coil that is energized by a magnet to vibrate the diaphragm connected to the coil to emit sound. However, the above-mentioned moving coil speaker can produce good sound quality, but it needs a certain space for the sound chamber, and the thickness can never be reduced. When applied to mobile phones, personal digital assistants and notebook computers, etc. When the electronic device is on, the thickness of the product cannot be reduced.
本發明提供一種具有駐電式電聲致動器之電子裝置，其中駐電式電聲致動器之厚度遠小於傳統的動圈式揚聲器，因此可增加電子裝置內部空間的使用效率。The present invention provides an electronic device having a resident electroacoustic actuator, wherein the thickness of the resident electroacoustic actuator is much smaller than that of a conventional moving coil speaker, thereby increasing the efficiency of use of the internal space of the electronic device.
本發明第一實施例之具有電聲致動器之電子裝置包含有一殼體，其具有複數個開口，貫穿於殼體的內表面與外表面間。在殼體的內表面上，設置有一電聲致動器，其包含有一第一駐電振膜，位於殼體的內表面上，第一駐電振膜具有由介電材料所製成且帶有靜電荷之一第一薄膜主體 以及形成於第一薄膜主體的下表面上之一第一電極層。在第一薄膜主體的上表面上，疊設有一第一導電板做為電極，其具複數個開口。此外，在第一駐電振膜與第一導電板之間，設置有至少一個第一間隙子，係用以使第一駐電振膜與第一導電板間相隔一預定之距離。An electronic device having an electroacoustic actuator according to a first embodiment of the present invention includes a housing having a plurality of openings extending through an inner surface and an outer surface of the housing. An electroacoustic actuator is disposed on the inner surface of the housing, and includes a first resident diaphragm disposed on an inner surface of the housing, the first resident diaphragm having a dielectric material and a strap One of the first film bodies having a static charge And a first electrode layer formed on a lower surface of the first film body. On the upper surface of the first film body, a first conductive plate is stacked as an electrode having a plurality of openings. In addition, between the first resident electric diaphragm and the first conductive plate, at least one first gap is disposed for separating the first resident diaphragm from the first conductive plate by a predetermined distance.
本發明第二實施例之具有電聲致動器之電子裝置相較於第一實施例之電子裝置另包含一第二導電板做為電極，疊設於第一導電板上，並具有複數個開口。在第一與第二導電板之間，設置有一絕緣層，由多孔的透氣膜所構成。另外，在第二導電板上，疊設有一第二駐電振膜，其包含有由介電材料所製成且帶有靜電荷之一第二薄膜主體以及形成於第二薄膜主體的上表面上之一第二電極層，其中一吸音材料層係貼附於第二電極層上。此外，在第二駐電振膜與第二導電板之間，設置有至少一個第二間隙子，用以使第二駐電振膜與第二導電板間相隔一預定之距離。The electronic device with the electroacoustic actuator according to the second embodiment of the present invention further includes a second conductive plate as an electrode, stacked on the first conductive plate, and having a plurality of electronic devices. Opening. Between the first and second conductive plates, an insulating layer is provided, which is composed of a porous gas permeable membrane. In addition, on the second conductive plate, a second resident diaphragm is stacked, which comprises a second film body made of a dielectric material and having an electrostatic charge and formed on the upper surface of the second film body. And a second electrode layer, wherein a layer of sound absorbing material is attached to the second electrode layer. In addition, between the second resident diaphragm and the second conductive plate, at least one second spacer is disposed for separating the second resident diaphragm from the second conductive plate by a predetermined distance.
本發明第三實施例之具有電聲致動器之電子裝置包含有一殼體，其具有複數個開口，在殼體的內表面上，設置有一電聲致動器，其包含一導電板做為電極，設置於殼體的內表面上，且具有複數個開口。在導電板的上方，疊設有一駐電振膜，其具有由介電材料所製成且帶有靜電荷之一薄膜主體以及形成於薄膜主體的上表面上之一電極層。此外，在駐電振膜與導電板之間，設置有至少一個間隙子，用以使駐電振膜與導電板間相隔一預定之距離。另外，一吸音材料層貼附於電極層上。An electronic device with an electroacoustic actuator according to a third embodiment of the present invention includes a housing having a plurality of openings, and an electroacoustic actuator including an electrically conductive plate is disposed on an inner surface of the housing as The electrode is disposed on an inner surface of the housing and has a plurality of openings. Above the conductive plate, a resident diaphragm is stacked, which has a film body made of a dielectric material and having an electrostatic charge and an electrode layer formed on the upper surface of the film body. In addition, at least one gap is disposed between the resident diaphragm and the conductive plate for spacing the resident diaphragm from the conductive plate by a predetermined distance. In addition, a layer of sound absorbing material is attached to the electrode layer.
本發明第四實施例之具有電聲致動器之電子裝置係大體上相同於第三實施例之電子裝置，所不同的是，原第三實施例之電聲致動的導電板係以鍍在殼體的內表面上的導電層所取代。The electronic device with the electroacoustic actuator according to the fourth embodiment of the present invention is substantially the same as the electronic device of the third embodiment, except that the electroacoustic actuated conductive plate of the third embodiment is plated. The conductive layer on the inner surface of the housing is replaced.
為了讓本發明之上述和其他目的、特徵、和優點能更明顯，下文特舉本發明實施例，並配合所附圖示，作詳細說明如下。The above and other objects, features, and advantages of the present invention will become more apparent from the embodiments of the invention.
參考第1、2a及2b圖，本發明第一實施例之具有電聲致動器之電子裝置100包含有一殼體110，其具有複數個開口114，貫穿於殼體110的內表面112與外表面118間。在殼體110的內表面112上，設置有一電聲致動器180，其包含有一駐電振膜(electret diaphragm)120，位於殼體110的內表面112上。另外，駐電振膜120具有由介電材料所製成且帶有靜電荷之一薄膜主體122以及形成於薄膜主體122的下表面上之一電極層124，其中，薄膜主體122的厚度為7至25μm，而電極層124的厚度為0.05至1μm。在薄膜主體122的上表面上，疊設有一導電板140做為電極，其具複數個開口142與開口114相對應，其中，導電板140的開口率大於20%，厚度則為0.1至1mm。此外，在駐電振膜120與導電板140之間，設置有至少一個間隙子(spacer)150，各間隙子150之間距為5至20mm、高度為100至400μm，係用以使駐電振膜120與導電板140間相隔一預定之距離。Referring to Figures 1, 2a and 2b, an electronic device 100 with an electroacoustic actuator according to a first embodiment of the present invention includes a housing 110 having a plurality of openings 114 extending through the inner surface 112 and the outer surface of the housing 110. There are 118 surfaces. On the inner surface 112 of the housing 110, an electroacoustic actuator 180 is provided that includes an electret diaphragm 120 on the inner surface 112 of the housing 110. In addition, the resident diaphragm 120 has a film body 122 made of a dielectric material and having an electrostatic charge, and an electrode layer 124 formed on the lower surface of the film body 122, wherein the film body 122 has a thickness of 7 Up to 25 μm, and the electrode layer 124 has a thickness of 0.05 to 1 μm. On the upper surface of the film main body 122, a conductive plate 140 is stacked as an electrode having a plurality of openings 142 corresponding to the openings 114, wherein the conductive plates 140 have an aperture ratio of more than 20% and a thickness of 0.1 to 1 mm. In addition, between the resident diaphragm 120 and the conductive plate 140, at least one spacer 150 is disposed, and each of the spacers 150 has a distance of 5 to 20 mm and a height of 100 to 400 μm for use in the resident vibration. The film 120 and the conductive plate 140 are separated by a predetermined distance.
為使薄膜主體122帶有靜電荷，原先未帶有靜電荷的薄膜主體122需要進行極化(polarized)處理，例如在電極層124形成後，以電暈充電(corona charging)法使薄膜主體122之內部及表面上帶有電荷。適合做為薄膜主體122之介電材料可為例如聚全氟乙丙烯(fluorinated ethylene propylene; FEP)、聚四氟乙烯(Polytetrafluoroethene; PTFE)、氟化氟亞乙烯(Polyvinylidene Fluoride; PVDF)、二氧化矽(SiO2 )或某些含氟之高分子聚合物。此外，駐電振膜120之周緣需加以固定，以防止其移動。在操作本實施例之電聲致動器180時，需要分別對導電板140及電極層124輸入與原本聲音訊號同相及反相的電子訊號，亦即差動(differential)訊號，使駐電振膜120受到來自導電板140及電極層124的庫倫(Coulomb)作用力以產生推拉效應(Push-Pull effect)而發生根據該電子訊號之振動，此振動會推動空氣而產生聲音。由駐電振膜120振動所產生的聲音可從開口114傳送至殼體110外，以讓使用者所聽見。In order to impart a static charge to the film body 122, the film body 122 which is not originally electrostatically charged needs to be subjected to a polarization treatment, for example, after the electrode layer 124 is formed, the film body 122 is made by corona charging. It has a charge inside and on the surface. The dielectric material suitable as the film body 122 may be, for example, fluorinated ethylene propylene (FEP), polytetrafluoroethene (PTFE), polyvinylvinylidene fluoride (PVDF), dioxide. Bismuth (SiO 2 ) or some fluorine-containing polymer. In addition, the periphery of the resident diaphragm 120 needs to be fixed to prevent its movement. When operating the electroacoustic actuator 180 of the present embodiment, it is necessary to input an electronic signal, that is, a differential signal, which is in phase and opposite to the original audio signal, to the conductive plate 140 and the electrode layer 124, respectively, so that the resident vibration is generated. The film 120 receives a Coulomb force from the conductive plate 140 and the electrode layer 124 to generate a Push-Pull effect, which generates vibration according to the electronic signal, which vibrates the air to generate sound. The sound generated by the vibration of the resident diaphragm 120 can be transmitted from the opening 114 to the outside of the housing 110 for the user to hear.
除此之外，由駐電振膜120振動所產生的聲音亦會穿過導電板140的開口142，為避免此聲音反射回來而影響電聲致動器的表現，導電板140的上表面較佳係離開其他元件一段之距離，例如大於1mm，或者是在導電板140的上表面上貼附一吸音材料層160，例如是玻璃纖維、泡棉或不織布等材料，其厚度為1mm至5mm。再者，為避免電極層124在殼體110上滑動而損壞，可在電極層124與殼體110之內表面112間，設置至少一個間隙子170與間隙子150相對應，其高度為30至50μm，防止電極層124與殼 體110直接接觸。另外，間隙子150較佳係可由黏膠所構成，例如是雙面膠，黏接導電板140與薄膜主體122。In addition, the sound generated by the vibration of the resident diaphragm 120 also passes through the opening 142 of the conductive plate 140. In order to prevent the sound from being reflected back and affecting the performance of the electroacoustic actuator, the upper surface of the conductive plate 140 is more Preferably, the distance from the other component is greater than 1 mm, or a layer of sound absorbing material 160 is attached to the upper surface of the conductive plate 140, such as glass fiber, foam or non-woven fabric, and has a thickness of 1 mm to 5 mm. Furthermore, in order to prevent the electrode layer 124 from being damaged by sliding on the housing 110, at least one spacer 170 may be disposed between the electrode layer 124 and the inner surface 112 of the housing 110 corresponding to the spacer 150, and the height thereof is 30 to 50μm, preventing electrode layer 124 and shell Body 110 is in direct contact. In addition, the spacer 150 is preferably made of an adhesive, such as a double-sided tape, and the conductive plate 140 and the film body 122 are bonded.
參考第1、3a及3b圖，本發明第二實施例之具有電聲致動器之電子裝置200包含有電子裝置100所具有之元件，亦即包含有殼體110以及電聲致動器180所具有之元件，包括有：駐電振膜120、導電板140、間隙子150、170以及吸音材料層160。除了上述元件之外，電子裝置200之電聲致動器280還包含有一導電板240做為電極，疊設於導電板140上，並具有複數個開口242與導電板140之開口142相對應，導電板240的厚度為0.1至1mm。在導電板140與240之間，設置有一絕緣層290，由多孔的透氣膜所構成，其厚度為20至200μm。另外，在導電板240上，疊設有一駐電振膜220，其包含有由介電材料所製成且帶有靜電荷之一薄膜主體222以及形成於薄膜主體222的上表面上之一電極層224，其中，吸音材料層160係貼附於電極層224上，而薄膜主體222的厚度為7至25μm，電極層224的厚度則為0.05至1μm。此外，在駐電振膜220與導電板240之間，設置有至少一個以例如黏膠所構成的間隙子250與間隙子150相對應，間隙子250之高度為100至400μm，係用以使駐電振膜220與導電板240間相隔一預定之距離。Referring to Figures 1, 3a and 3b, an electronic device 200 with an electroacoustic actuator according to a second embodiment of the present invention includes an element of the electronic device 100, that is, a housing 110 and an electroacoustic actuator 180. The components include: a resident diaphragm 120, a conductive plate 140, spacers 150, 170, and a sound absorbing material layer 160. In addition to the above components, the electroacoustic actuator 280 of the electronic device 200 further includes a conductive plate 240 as an electrode, stacked on the conductive plate 140, and having a plurality of openings 242 corresponding to the openings 142 of the conductive plate 140. The conductive plate 240 has a thickness of 0.1 to 1 mm. Between the conductive plates 140 and 240, an insulating layer 290 is provided, which is composed of a porous gas permeable film and has a thickness of 20 to 200 μm. In addition, on the conductive plate 240, a resident diaphragm 220 is stacked, which comprises a film body 222 made of a dielectric material and having an electrostatic charge, and an electrode formed on the upper surface of the film body 222. The layer 224, wherein the sound absorbing material layer 160 is attached to the electrode layer 224, and the film body 222 has a thickness of 7 to 25 μm, and the electrode layer 224 has a thickness of 0.05 to 1 μm. In addition, between the resident diaphragm 220 and the conductive plate 240, at least one spacer 250 made of, for example, a glue is provided corresponding to the spacer 150, and the height of the spacer 250 is 100 to 400 μm, which is used to make The resident diaphragm 220 and the conductive plate 240 are separated by a predetermined distance.
同樣地，為使薄膜主體222帶有靜電荷，原先未帶有靜電荷的薄膜主體222亦需要進行極化處理，以使其內部及表面上帶有電荷。而適合做為薄膜主體222之介電材料亦可為FEP、PTFE、PVDF、二氧化矽或某些含氟之高分子聚 合物。此外，駐電振膜220之周緣亦需加以固定，以防止其移動。在操作本實施例之電聲致動器280時，需對導電板140及電極層224輸入與原本聲音訊號同相的第一電子訊號，而電極層124及導電板240則分別輸入有一反相的第二電子訊號。如此，駐電振膜120、220將會受到來自導電板140與電極層124以及導電板240與電極層224之庫倫作用，並分別根據該第一電子訊號與第二電子訊號產生振動而發出聲音。由駐電振膜220振動所產生的聲音能夠穿過多孔的絕緣層290，並通過開口114傳送至殼體110外。如此的雙振膜結構之電聲致動器280能夠較第一實施例之單振膜結構之電聲致動器180產生大上一倍(3dB)的音量。Similarly, in order to impart a static charge to the film body 222, the film body 222, which has not previously been electrostatically charged, also needs to be subjected to a polarization treatment to charge the inside and the surface. The dielectric material suitable for the film body 222 may also be FEP, PTFE, PVDF, cerium oxide or some fluorine-containing polymer. Compound. In addition, the periphery of the resident diaphragm 220 needs to be fixed to prevent its movement. When the electroacoustic actuator 280 of the embodiment is operated, the first electronic signal that is in phase with the original sound signal is input to the conductive plate 140 and the electrode layer 224, and the electrode layer 124 and the conductive plate 240 are respectively input with an inversion. Second electronic signal. Thus, the resident diaphragms 120, 220 will be subjected to the Coulomb action from the conductive plate 140 and the electrode layer 124 and the conductive plate 240 and the electrode layer 224, and respectively generate sound according to the vibration of the first electronic signal and the second electronic signal. . The sound generated by the vibration of the resident diaphragm 220 can pass through the porous insulating layer 290 and be transmitted through the opening 114 to the outside of the housing 110. Such an electroacoustic actuator 280 having a dual diaphragm structure can generate a volume that is twice as large (3 dB) as that of the electroacoustic actuator 180 of the single diaphragm structure of the first embodiment.
參考第1、4a及4b圖，本發明第三實施例之具有電聲致動器之電子裝置300包含有殼體110，在殼體110的內表面112上，設置有一電聲致動器380，其包含一導電板340做為電極，設置於殼體110的內表面112上，且具有複數個開口342與開口114相對應。在導電板340的上方，疊設有一駐電振膜320，其具有由介電材料所製成且帶有靜電荷之一薄膜主體322以及形成於薄膜主體322的上表面上之一電極層324，其中，薄膜主體322的厚度為7至25μm，而電極層324的厚度為0.05至1μm。此外，在駐電振膜320與導電板340之間，設置有至少一個以例如黏膠所構成的間隙子350，各間隙子350之間距為5至20mm、高度為100至400μm，係用以使駐電振膜320與導電板340間相隔一預定之距離。為避免導電板340在殼體110上滑 動而損壞，在導電板340與殼體110之內表面112之間，設置有至少一個以例如黏膠所構成的間隙子370與問隙子350相對應，其高度為30至50μm，防止導電板340與殼體110直接接觸。另外，為了避免駐電振膜320振動所產生的聲波反射回來影響電聲致動器的表現，一吸音材料層360係貼附於電極層324上。Referring to Figures 1, 4a and 4b, an electronic device 300 with an electroacoustic actuator according to a third embodiment of the present invention includes a housing 110 on which an electroacoustic actuator 380 is disposed. The conductive plate 340 is disposed as an electrode on the inner surface 112 of the housing 110 and has a plurality of openings 342 corresponding to the openings 114. Above the conductive plate 340, a resident diaphragm 320 having a film body 322 made of a dielectric material and having an electrostatic charge and an electrode layer 324 formed on the upper surface of the film body 322 is stacked. Wherein the film body 322 has a thickness of 7 to 25 μm, and the electrode layer 324 has a thickness of 0.05 to 1 μm. In addition, between the resident diaphragm 320 and the conductive plate 340, at least one spacer 350 made of, for example, a glue is provided, and each of the spacers 350 has a distance of 5 to 20 mm and a height of 100 to 400 μm. The resident diaphragm 320 and the conductive plate 340 are separated by a predetermined distance. In order to prevent the conductive plate 340 from sliding on the housing 110 Dynamically damaged, between the conductive plate 340 and the inner surface 112 of the housing 110, at least one spacer 370 composed of, for example, a glue is provided corresponding to the gap 350, and the height thereof is 30 to 50 μm to prevent conduction. The plate 340 is in direct contact with the housing 110. In addition, a sound absorbing material layer 360 is attached to the electrode layer 324 in order to prevent the sound waves generated by the vibration of the electret diaphragm 320 from being reflected back to affect the performance of the electroacoustic actuator.
同樣地，為使薄膜主體322帶有靜電荷，原先未帶有靜電荷的薄膜主體322亦需要進行極化處理，以使其內部及表面上帶有電荷。另外，駐電振膜320之周緣亦需加以固定，以防止其移動。在操作本實施例之電聲致動器380時，亦需對導電板340及電極層324輸入一電子訊號，以使駐電振膜320根據該電子訊號產生振動而發出聲音。Similarly, in order to impart a static charge to the film body 322, the film body 322, which has not been electrostatically charged, also needs to be subjected to a polarization treatment to charge the inside and the surface. In addition, the periphery of the resident diaphragm 320 also needs to be fixed to prevent its movement. When the electroacoustic actuator 380 of the present embodiment is operated, an electronic signal is also input to the conductive plate 340 and the electrode layer 324, so that the resident diaphragm 320 generates a sound according to the vibration of the electronic signal.
參考第1、5a及5b圖，本發明第四實施例之具有電聲致動器之電子裝置400係大體上相同於電子裝置300，所不同的是，電子裝置400的電聲致動器480未包含有間隙子370，且原電聲致動器380的導電板340係以鍍在殼體110的內表面112上的導電層440所取代。其餘第5a及5b圖中相同於第4a及4b圖的標號係表示相同的元件，在此不加以贅述。同樣地，在操作本實施例之電聲致動器480時，亦需對導電層440及電極層324輸入一電子訊號，以使駐電振膜320根據該電子訊號產生振動而發出聲音。Referring to Figures 1, 5a and 5b, an electronic device 400 having an electroacoustic actuator according to a fourth embodiment of the present invention is substantially identical to the electronic device 300, except that the electroacoustic actuator 480 of the electronic device 400 is used. The spacer 370 is not included and the conductive plate 340 of the primary electroacoustic actuator 380 is replaced with a conductive layer 440 plated on the inner surface 112 of the housing 110. The same reference numerals are given to the same elements in the other FIGS. 5a and 5b, and the same elements are not described herein. Similarly, when the electroacoustic actuator 480 of the present embodiment is operated, an electronic signal is also input to the conductive layer 440 and the electrode layer 324, so that the resident diaphragm 320 generates a sound according to the vibration of the electronic signal.
根據本發明之電子裝置100、200、300、400所包含的電聲致動器180、280、380、480係裝設在殼體110上，殼體110可為電子裝置100、200、300、400之前蓋、側蓋或 背蓋。吾人應可瞭解，這些電聲致動器180、280、380、480需要與電子裝置100、200、300、400內的其他元件，例如電路板電性連接方可作動。再請參考第2a、2b、3a、3b、4a、4b、5a及5b圖，當本發明之電聲致動器180、280、380、480裝設於使用者可拆卸之背蓋110上時，背蓋110的內表面112上設置有接點116a，與導電板140、340、導電層440電性連接，而設置在背蓋110的內表面112上的接點116b則與電極層124、324電性連接。另外，在電子裝置200的背蓋110的內表面112上，還設置有接點119a與119b，分別與電聲致動器280的導電板240以及電極層224電性連接。如第2b、3b、4b及5b所示，當背蓋110裝於電子裝置100、200、300、400上時，接點116a及116b會分別與位在電子裝置100、200、300、400上的電路板195的接點197a及197b電性接觸，而接點119a及119b(如第3b所示)則分別與電子裝置200的電路板195上的接點198a及198b電性接觸，以將電子信號輸入至導電板140、240、340、導電層440以及電極層124、224、324，使駐電振膜120、220、320根據該等電子訊號產生振動而發出聲音。The electroacoustic actuators 180, 280, 380, 480 included in the electronic device 100, 200, 300, 400 according to the present invention are mounted on the housing 110, which may be the electronic devices 100, 200, 300, 400 front cover, side cover or Back cover. It should be understood by those skilled in the art that these electroacoustic actuators 180, 280, 380, 480 need to be electrically coupled to other components within the electronic device 100, 200, 300, 400, such as a circuit board. Referring again to Figures 2a, 2b, 3a, 3b, 4a, 4b, 5a and 5b, when the electroacoustic actuators 180, 280, 380, 480 of the present invention are mounted on the user's detachable back cover 110 The inner surface 112 of the back cover 110 is provided with a contact 116a electrically connected to the conductive plates 140, 340 and the conductive layer 440, and the contact 116b disposed on the inner surface 112 of the back cover 110 is opposite to the electrode layer 124. 324 electrical connection. In addition, on the inner surface 112 of the back cover 110 of the electronic device 200, contacts 119a and 119b are further disposed to be electrically connected to the conductive plate 240 and the electrode layer 224 of the electroacoustic actuator 280, respectively. As shown in FIGS. 2b, 3b, 4b, and 5b, when the back cover 110 is mounted on the electronic device 100, 200, 300, 400, the contacts 116a and 116b are respectively positioned on the electronic device 100, 200, 300, 400. The contacts 197a and 197b of the circuit board 195 are in electrical contact, and the contacts 119a and 119b (as shown in FIG. 3b) are electrically contacted with the contacts 198a and 198b on the circuit board 195 of the electronic device 200, respectively. The electronic signals are input to the conductive plates 140, 240, 340, the conductive layer 440, and the electrode layers 124, 224, 324, so that the resonant diaphragms 120, 220, 320 generate vibrations according to the electronic signals.
本發明之電聲致動器所包含的間隙子係可為彼此相互分開的間隙子，然而，吾人應可瞭解，上述間隙子亦可利用在薄片上形成複數個開口來取代之。The gap actuators included in the electroacoustic actuator of the present invention may be spacers that are separated from each other. However, it should be understood that the spacers may be replaced by forming a plurality of openings in the sheet.
根據本發明之電子裝置可為可攜式電子裝置，例如是行動電話、個人數位助理器或筆記型電腦等。由於本發明之電子裝置之電聲致動器的厚度遠小於傳統的動圈式揚聲器 的厚度，因此可增加電子裝置內部空間的使用效率。本發明之電子裝置之電聲致動器可裝設於背蓋上，因此可進一步降低電子裝置的厚度並增加其內部的可用空間。另外，本發明第一、二實施例之電聲致動器的駐電振膜之駐電面係面向結構體的內部，能有效避免灰塵及水氣與駐電振膜之駐電面接觸而影響其駐電特性。The electronic device according to the present invention may be a portable electronic device such as a mobile phone, a personal digital assistant or a notebook computer. Since the thickness of the electroacoustic actuator of the electronic device of the present invention is much smaller than that of the conventional moving coil speaker The thickness of the device can increase the efficiency of use of the internal space of the electronic device. The electroacoustic actuator of the electronic device of the present invention can be mounted on the back cover, thereby further reducing the thickness of the electronic device and increasing the available space inside thereof. In addition, the resident surface of the resident diaphragm of the electroacoustic actuator according to the first and second embodiments of the present invention faces the inside of the structure, and can effectively prevent dust and moisture from coming into contact with the electrifying surface of the resident diaphragm. Affect its resident characteristics.
雖然本發明已以前述較佳實施例揭示，然其並非用以限定本發明，任何熟習此技藝者，在不脫離本發明之精神和範圍內，當可作各種之更動與修改。因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。While the present invention has been described in its preferred embodiments, it is not intended to limit the scope of the invention, and various modifications and changes can be made without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.
100‧‧‧電子裝置100‧‧‧Electronic devices
110‧‧‧殼體110‧‧‧shell
112‧‧‧內表面112‧‧‧ inner surface
114‧‧‧開口114‧‧‧ openings
116a‧‧‧接點116a‧‧‧Contacts
116b‧‧‧接點116b‧‧‧Contacts
118‧‧‧外表面118‧‧‧ outer surface
119a‧‧‧接點119a‧‧‧Contacts
119b‧‧‧接點119b‧‧‧Contacts
120‧‧‧駐電振膜120‧‧‧Electrical diaphragm
122‧‧‧薄膜主體122‧‧‧ film body
124‧‧‧電極層124‧‧‧electrode layer
140‧‧‧導電板140‧‧‧ Conductive plate
142‧‧‧開口142‧‧‧ openings
150‧‧‧間隙子150‧‧‧ spacer
160‧‧‧吸音材料層160‧‧‧layer of sound absorbing material
170‧‧‧間隙子170‧‧‧ spacer
180‧‧‧電聲致動器180‧‧‧Electroacoustic actuator
195‧‧‧電路板195‧‧‧ circuit board
197a‧‧‧接點197a‧‧‧Contacts
197b‧‧‧接點197b‧‧‧Contacts
198a‧‧‧接點198a‧‧‧Contacts
198b‧‧‧接點198b‧‧‧Contacts
200‧‧‧電子裝置200‧‧‧Electronic devices
220‧‧‧駐電振膜220‧‧‧Electrical diaphragm
222‧‧‧薄膜主體222‧‧‧ film body
224‧‧‧電極層224‧‧‧electrode layer
240‧‧‧導電板240‧‧‧conductive plate
242‧‧‧開口242‧‧‧ openings
250‧‧‧間隙子250‧‧‧ spacer
280‧‧‧電聲致動器280‧‧‧ electroacoustic actuator
290‧‧‧絕緣層290‧‧‧Insulation
300‧‧‧電子裝置300‧‧‧Electronic devices
320‧‧‧駐電振膜320‧‧‧Electrical diaphragm
322‧‧‧薄膜主體322‧‧‧ film body
324‧‧‧電極層324‧‧‧electrode layer
340‧‧‧導電板340‧‧‧ Conductive plate
342‧‧‧開口342‧‧‧ openings
350‧‧‧間隙子350‧‧‧ spacer
360‧‧‧吸音材料360‧‧‧Acoustic materials
370‧‧‧間隙子370‧‧‧ spacer
400‧‧‧電子裝置400‧‧‧Electronic devices
440‧‧‧導電層440‧‧‧ Conductive layer
480‧‧‧電聲致動器480‧‧‧ electroacoustic actuator
第1圖：為根據本發明之電子裝置之外觀。Figure 1 is an appearance of an electronic device according to the present invention.
第2a圖：為本發明第一實施例之具有電聲致動器之電子裝置的剖面圖，其中背蓋係與電子裝置分開。2a is a cross-sectional view of an electronic device having an electroacoustic actuator according to a first embodiment of the present invention, wherein the back cover is separated from the electronic device.
第2b圖：為本發明第一實施例之具有電聲致動器之電子裝置的剖面圖，其中背蓋係裝設於電子裝置上。Figure 2b is a cross-sectional view of an electronic device having an electroacoustic actuator according to a first embodiment of the present invention, wherein the back cover is mounted on the electronic device.
第3a圖：為本發明第二實施例之具有電聲致動器之電子裝置的剖面圖，其中背蓋係與電子裝置分開。Figure 3a is a cross-sectional view of an electronic device having an electroacoustic actuator according to a second embodiment of the present invention, wherein the back cover is separated from the electronic device.
第3b圖：為本發明第二實施例之具有電聲致動器之電子裝置的剖面圖，其中背蓋係裝設於電子裝置上。Figure 3b is a cross-sectional view of an electronic device having an electroacoustic actuator according to a second embodiment of the present invention, wherein the back cover is mounted on the electronic device.
第4a圖：為本發明第三實施例之具有電聲致動器之電子裝置的剖面圖，其中背蓋係與電子裝置分開。Figure 4a is a cross-sectional view of an electronic device having an electroacoustic actuator according to a third embodiment of the present invention, wherein the back cover is separated from the electronic device.
第4b圖：為本發明第三實施例之具有電聲致動器之電子裝置的剖面圖，其中背蓋係裝設於電子裝置上。Figure 4b is a cross-sectional view of an electronic device having an electroacoustic actuator according to a third embodiment of the present invention, wherein the back cover is mounted on the electronic device.
第5a圖：為本發明第四實施例之具有電聲致動器之電子裝置的剖面圖，其中背蓋係與電子裝置分開。Figure 5a is a cross-sectional view of an electronic device having an electroacoustic actuator according to a fourth embodiment of the present invention, wherein the back cover is separated from the electronic device.
第5b圖：為本發明第四實施例之具有電聲致動器之電子裝置的剖面圖，其中背蓋係裝設於電子裝置上。Figure 5b is a cross-sectional view of an electronic device having an electroacoustic actuator according to a fourth embodiment of the present invention, wherein the back cover is mounted on the electronic device.
100‧‧‧電子裝置100‧‧‧Electronic devices
110‧‧‧殼體110‧‧‧shell
112‧‧‧內表面112‧‧‧ inner surface
114‧‧‧開口114‧‧‧ openings
116a‧‧‧接點116a‧‧‧Contacts
116b‧‧‧接點116b‧‧‧Contacts
118‧‧‧外表面118‧‧‧ outer surface
120‧‧‧駐電振膜120‧‧‧Electrical diaphragm
122‧‧‧薄膜主體122‧‧‧ film body
124‧‧‧電極層124‧‧‧electrode layer
140‧‧‧導電板140‧‧‧ Conductive plate
142‧‧‧開口142‧‧‧ openings
150‧‧‧間隙子150‧‧‧ spacer
160‧‧‧吸音材料層160‧‧‧layer of sound absorbing material
170‧‧‧間隙子170‧‧‧ spacer
180‧‧‧電聲致動器180‧‧‧Electroacoustic actuator
195‧‧‧電路板195‧‧‧ circuit board
197a‧‧‧接點197a‧‧‧Contacts
197b‧‧‧接點197b‧‧‧Contacts
Claims (17)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW097141921A TWI454156B (en) | 2008-10-31 | 2008-10-31 | Electronic device with electret electro-acoustic transducer |
| EP09169282.2A EP2182737B1 (en) | 2008-10-31 | 2009-09-02 | Electronic device with electret electro-acoustic transducer |
| EP11162045.6A EP2369855B1 (en) | 2008-10-31 | 2009-09-02 | Electronic device with electret electro-acoustic transducer |
| US12/560,132 US8411882B2 (en) | 2008-10-31 | 2009-09-15 | Electronic device with electret electro-acoustic transducer |
| JP2009241546A JP5054749B2 (en) | 2008-10-31 | 2009-10-20 | Electronic device with electret electroacoustic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW097141921A TWI454156B (en) | 2008-10-31 | 2008-10-31 | Electronic device with electret electro-acoustic transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201018252A TW201018252A (en) | 2010-05-01 |
| TWI454156B true TWI454156B (en) | 2014-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW097141921A TWI454156B (en) | 2008-10-31 | 2008-10-31 | Electronic device with electret electro-acoustic transducer |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP2369855B1 (en) |
| JP (1) | JP5054749B2 (en) |
| TW (1) | TWI454156B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8243965B2 (en) * | 2008-10-15 | 2012-08-14 | Htc Corporation | Electro-acoustic transducer |
| US8472650B2 (en) | 2008-10-15 | 2013-06-25 | Htc Corporation | Electro-acoustic transducer |
| TWI439139B (en) * | 2010-06-17 | 2014-05-21 | Htc Corp | Capacitive electro-acoustic transduction system and capacitive electro-acoustic transducer thereof |
| DE102013213891A1 (en) * | 2013-05-21 | 2014-11-27 | Siemens Medical Instruments Pte. Ltd. | microphone array |
| WO2018213781A1 (en) * | 2017-05-18 | 2018-11-22 | The Johns Hopkins University | Push-pull electret transducer with controlled restoring force for low frequency microphones and energy harvesting |
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- 2009-09-02 EP EP09169282.2A patent/EP2182737B1/en not_active Not-in-force
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| US20050254673A1 (en) * | 1999-05-19 | 2005-11-17 | California Institute Of Technology | High performance MEMS thin-film teflon electret microphone |
| US7091650B2 (en) * | 2003-02-25 | 2006-08-15 | Palo Alto Research Center Incorporated | Piezoelectric ceramic thick film element, array of elements, and devices |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2369855B1 (en) | 2014-05-07 |
| JP5054749B2 (en) | 2012-10-24 |
| TW201018252A (en) | 2010-05-01 |
| EP2369855A2 (en) | 2011-09-28 |
| EP2182737A1 (en) | 2010-05-05 |
| JP2010109979A (en) | 2010-05-13 |
| EP2182737B1 (en) | 2014-03-05 |
| EP2369855A3 (en) | 2012-04-04 |
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| MM4A | Annulment or lapse of patent due to non-payment of fees |