[특허]Plane-type speaker and AV apparatus

[미국특허] Plane-type speaker and AV apparatus 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04R-017/00 H04R-007/10 H04R-007/04 H04R-007/18
출원번호	US-0600202 (2015-01-20)
등록번호	US-9363607 (2016-06-07)
우선권정보	JP-2011-110156 (2011-05-17)
발명자 / 주소	Ando, Masamichi
출원인 / 주소	MURATA MANUFACTURING CO., LTD.
대리인 / 주소	Arent Fox LLP
인용정보	피인용 횟수 : 8 인용 특허 : 30

초록 ▼

A plane-type speaker where, on one of the main surfaces of an exciter film, there are placed piezoelectric films which are expanded and contracted by sound-releasing driving signals applied thereto. An oscillation plate is secured to the excited film through frame members. The oscillation plate has a flat-plate shape and is secured to the exciter film while having a warped shape such that it is gradually spaced further away from the exciter film, with decreasing distance from the secured ends to a center area, when viewed at a side surface. This realizes a state where the exciter film is pulled outwardly with respect to the secured ends due to bending stresses therein. If sound-releasing driving signals are applied to the piezoelectric films in this state, the exciter film contracts and expands along with the expansion and contraction of the piezoelectric films, thereby causing the oscillation plate to oscillate.

대표청구항 ▼

1. A plane-type speaker comprising: a piezoelectric resin film having electrodes on opposed surfaces thereof;an exciter film having a main surface upon which the piezoelectric film is mounted; andan oscillation plate having a surface which is warped in a state where the oscillation plate is not secured to the exciter film, and, when the oscillation plate is secured to the exciter film, the surface of the oscillation plate has a flattened shape with respect to the main surface of the exciter film and a constant stress is applied to the oscillation plate in a non-operated state such that a pulling tension is applied to the exciter film when the plane-type speaker is in the non-operated state. 2. The plane-type speaker according to claim 1, wherein the oscillation plate comprises a main fiat plate and an auxiliary plate mounted to the main flat plate, the auxiliary plate having a smaller width and a higher rigidity than that of the main flat plate, andthe auxiliary plate having a warped shape in the state where the oscillation plate is not secured to the exciter film. 3. The plane-type speaker according to claim 2, wherein the piezoelectric resin film comprises a plurality of individual piezoelectric resin films which are divided into a first set of individual piezoelectric resin films in an area which is overlaid on the auxiliary plate, and a second set of individual piezoelectric resin films in an area which is not overlaid on the auxiliary plate, anda first resin of the first set of individual piezoelectric resin films is different from a second resin of the second set of individual piezoelectric films. 4. The plane-type speaker according to claim 3, wherein the exciter film, the oscillation plate and the electrodes are made of a material with optical transparency, andthe first resin is a polylactic acid, and the second resin is a PolyVinylidene DiFluoride. 5. The plane-type speaker according to claim 1, wherein the piezoelectric resin film comprises a plurality of individual piezoelectric films, the plurality of individual piezoelectric films being divided in a direction parallel to the main surface of the exciter film and secured along opposite end sides of the exciter film. 6. The plane-type speaker according to claim 1, wherein the piezoelectric resin film is PolyVinylidene DiFluoride. 7. The plane-type speaker according to claim 1, wherein the exciter film, the oscillation plate and the electrodes arc made of a material with optical transparency, andthe piezoelectric resin film is a polylactic acid. 8. The plane-type speaker according to claim 1, further comprising a sound-absorption member between the oscillation plate and the exciter film. 9. The plane-type speaker according to claim 1, further comprising a flat-plate type touch panel on the oscillation plate. 10. An AV apparatus comprising: the plane-type speaker according to claim 1; andan image reproduction apparatus on the oscillation plate. 11. An AV apparatus comprising: the plane-type speaker according to claim 1, andwherein the oscillation plate forms an image reproduction apparatus. 12. An AV apparatus comprising: the plane-type speaker according to claim 1, andan image reproduction apparatus between the exciter film and the oscillation plate of the plane-type speaker.

이 특허에 인용된 특허 (30) 인용/피인용 타임라인 분석

Schafft Hugo Willy (Des Plaines IL), Acoustic transducer with elastomeric coupling.
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Takahashi, Masatake; Onishi, Yasuharu; Sasaki, Yasuhiro; Shinoda, Shigeki; Mataga, Junichiro; Mori, Ukyo; Kuroda, Jun; Murata, Yukio, Actuator, piezoelectric actuator, electronic device, and method for attenuating vibration and converting vibration direction.
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Fox Robert L. ; Hellbaum Richard F. ; Bryant Robert G. ; Copeland ; Jr. Benjamin M., Advanced layered composite polylaminate electroactive actuator and sensor.
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Fleming James G., Bistable microelectromechanical actuator.
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Kodama ; Akihiko, Curved polymeric piezoelectric electro-acoustic transducer.
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Yoon,Kwang Joon; Park,Hoon Cheol, Curved shape actuator device composed of electro active layer and fiber composite layers.
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Ronald E. Pelrine ; Roy D. Kornbluh ; Joseph S. Eckerle, Elastomeric dielectric polymer film sonic actuator.
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Park Kyung T. (710 Newton Rd. Berwyn PA 19312) Radice Peter F. (438 Springhouse Rd. King of Prussia PA 19406), Electroacoustic novelties.
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Park Kyung T. (Berwyn PA) Radice Peter F. (Upper Merion PA), Electroacoustic novelties.
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Pelrine, Ronald E.; Kornbluh, Roy D., Electroactive polymer devices.
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Pelrine, Ronald E.; Kornbluh, Roy D.; Pei, Qibing; Joseph, Jose P., Electroactive polymer electrodes.
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Ronald E. Pelrine ; Roy D. Kornbluh ; Qibing Pei ; Jose P. Joseph, Electroactive polymer electrodes.
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Pelrine, Ronald E.; Kornbluh, Roy D.; Oh, Seajin; Joseph, Jose P., Electroactive polymer fabrication.
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Pelrine,Ronald E.; Kornbluh,Roy D.; Garcia,Pablo E.; Eckerle,Joseph Stephen, Electroactive polymer generators.
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Pelrine, Ronald E.; Kornbluh, Roy D.; Pei, Qibing, Electroactive polymer transducers and actuators.
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Kirjavainen, Kari, Electromechanic film and acoustic element.
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Lee Kye S. (Kyungki KRX), Film speaker using a piezo-electric element.
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Athanas,Lewis, Mechanical-to-acoustical transformer and multi-media flat film speaker.
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Tanner,Edward T.; Ott,William F., Method and apparatus for scavenging energy during pump operation.
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Takeuchi Yukihisa,JPX ; Nanataki Tsutomu,JPX ; Takeuchi Katsuyuki,JPX, Method for producing ceramic diaphragm structure.
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Clark Stephen E., Method of manufacturing flextensional transducer using pre-curved piezoelectric ceramic layer.
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Bernstein Jonathan J., Micro-shell transducer.
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Booth, Jeffrey Davis; Bokaemper, Stefan; White, Jr., Robert H., Optically clear diaphragm for an acoustic transducer and method for making same.
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Onishi, Yasuharu; Sasaki, Yasuhiro; Takahashi, Masatake; Mori, Ukyo; Murata, Yukio, Piezo-electric actuator and electronic device.
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Lo K. Peter ; Nechitailo Nicholas V. ; Moses Howard J. ; Decker Lawrence H. ; Groger Howard P. ; Churchill Russell J., Piezoceramic vibrotactile transducer based on pre-compressed arch.
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Maeda Kyoichi (Tokyo JPX), Piezoelectric loudspeaker.
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Kano, Sawako, Piezoelectric speaker.
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Szilagyi Andrei ; Strugach Michael, Piezoelectric speaker.
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Takeuchi Yukihisa (Aichi-ken JPX) Nanataki Tsutomu (Nagoya JPX), Piezoelectric/electrostrictive film element and method of producing the same.
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Takeuchi Yukihisa,JPX ; Nanataki Tsutomu,JPX, Piezoelectric/electrostrictive film element with a diaphragm having at least one stress releasing end section.
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이 특허를 인용한 특허 (8) 인용/피인용 타임라인 분석

Choi, YeongRak; Lee, Sungtae, Display device for generating sound by vibrating panel.
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Choi, YeongRak; Oh, ChangHo; Park, KwanHo; Lee, Sungtae, Organic light emitting display device including a sound generating apparatus.
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Choi, YeongRak; Park, KwanHo; Lee, Sungtae; Kim, Kwangho, Panel vibration type display device for generating sound.
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Choi, YeongRak; Oh, ChangHo; Park, KwanHo; Lee, Sungtae, Panel vibration type sound generating display device.
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Choi, YeongRak; Park, KwanHo; Lee, Sungtae, Panel vibration type sound generating display device.
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Choi, YeongRak; Park, KwanHo; Lee, Sungtae, Panel vibration type sound generating display device.
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Lee, Sungtae; Choi, YeongRak, Panel vibration type sound generating display device.
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Choi, YeongRak; Lee, Sungtae, Panel vibration type sound-generating display device.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

[미국특허] Plane-type speaker and AV apparatus 원문보기

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[미국특허] Plane-type speaker and AV apparatus 원문보기

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이 특허에 인용된 특허 (30) 인용/피인용 타임라인 분석

이 특허를 인용한 특허 (8) 인용/피인용 타임라인 분석

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