EP0926924A3 - Speaker - Google Patents

Speaker Download PDF

Info

Publication number
EP0926924A3
EP0926924A3 EP98401003A EP98401003A EP0926924A3 EP 0926924 A3 EP0926924 A3 EP 0926924A3 EP 98401003 A EP98401003 A EP 98401003A EP 98401003 A EP98401003 A EP 98401003A EP 0926924 A3 EP0926924 A3 EP 0926924A3
Authority
EP
European Patent Office
Prior art keywords
section
speaker
base section
electrodes
driving electrodes
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.)
Granted
Application number
EP98401003A
Other languages
German (de)
French (fr)
Other versions
EP0926924B1 (en
EP0926924A2 (en
Inventor
Takeshi Nakamura
Takayuki Kaneko
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Publication of EP0926924A2 publication Critical patent/EP0926924A2/en
Publication of EP0926924A3 publication Critical patent/EP0926924A3/en
Application granted granted Critical
Publication of EP0926924B1 publication Critical patent/EP0926924B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/127—Non-planar diaphragms or cones dome-shaped
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/023—Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

The speaker (10) has a semi-spherical vibration section (12) and a ringed plate-like base section (14). The vibration section and the base section are formed as a single, unitary piezoelectric body. Driving electrodes (18, 20) are located on the single unitary body comprising the vivration section and the base section. The driving electrodes are connected with lead electrodes (22, 24) and the lead electrodes are connected with connecting terminals (26, 28).
EP98401003A 1997-12-27 1998-04-24 Speaker Expired - Lifetime EP0926924B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP36813397 1997-12-27
JP09368133A JP3134835B2 (en) 1997-12-27 1997-12-27 Speaker

Publications (3)

Publication Number Publication Date
EP0926924A2 EP0926924A2 (en) 1999-06-30
EP0926924A3 true EP0926924A3 (en) 2005-04-13
EP0926924B1 EP0926924B1 (en) 2008-08-20

Family

ID=18491050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401003A Expired - Lifetime EP0926924B1 (en) 1997-12-27 1998-04-24 Speaker

Country Status (5)

Country Link
EP (1) EP0926924B1 (en)
JP (1) JP3134835B2 (en)
KR (1) KR100320300B1 (en)
CN (1) CN1132499C (en)
DE (1) DE69839907D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100906335B1 (en) * 2007-08-07 2009-07-06 티.비텔레콤(주) Method for manufacturing base member of digital microphone

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4284921A (en) * 1977-11-17 1981-08-18 Thomson-Csf Polymeric piezoelectric transducer with thermoformed protuberances
US4440983A (en) * 1980-01-08 1984-04-03 Thomson-Csf Electro-acoustic transducer with active dome
US4550797A (en) * 1983-01-17 1985-11-05 Victor Company Of Japan Loudspeaker diaphragm made of a molded, sintered ceramic body
EP0782370A2 (en) * 1995-12-14 1997-07-02 Murata Manufacturing Co., Ltd. Speaker for radiating sound waves in all directions relative to a speaker-supporting surface
EP0810811A2 (en) * 1996-05-31 1997-12-03 Murata Manufacturing Co., Ltd. Speaker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4284921A (en) * 1977-11-17 1981-08-18 Thomson-Csf Polymeric piezoelectric transducer with thermoformed protuberances
US4440983A (en) * 1980-01-08 1984-04-03 Thomson-Csf Electro-acoustic transducer with active dome
US4550797A (en) * 1983-01-17 1985-11-05 Victor Company Of Japan Loudspeaker diaphragm made of a molded, sintered ceramic body
EP0782370A2 (en) * 1995-12-14 1997-07-02 Murata Manufacturing Co., Ltd. Speaker for radiating sound waves in all directions relative to a speaker-supporting surface
EP0810811A2 (en) * 1996-05-31 1997-12-03 Murata Manufacturing Co., Ltd. Speaker

Also Published As

Publication number Publication date
EP0926924B1 (en) 2008-08-20
EP0926924A2 (en) 1999-06-30
JPH11196490A (en) 1999-07-21
CN1132499C (en) 2003-12-24
JP3134835B2 (en) 2001-02-13
KR100320300B1 (en) 2002-02-19
CN1222048A (en) 1999-07-07
KR19990062395A (en) 1999-07-26
DE69839907D1 (en) 2008-10-02

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