JPS5772499A - Method for driving bimorph type electrostrictive vibrator - Google Patents

Method for driving bimorph type electrostrictive vibrator

Info

Publication number
JPS5772499A
JPS5772499A JP14915380A JP14915380A JPS5772499A JP S5772499 A JPS5772499 A JP S5772499A JP 14915380 A JP14915380 A JP 14915380A JP 14915380 A JP14915380 A JP 14915380A JP S5772499 A JPS5772499 A JP S5772499A
Authority
JP
Japan
Prior art keywords
displacement
emaxl
piezoelectric element
bimorph type
emax
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
Application number
JP14915380A
Other languages
Japanese (ja)
Inventor
Fumio Sato
Shigeru Fujimura
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP14915380A priority Critical patent/JPS5772499A/en
Publication of JPS5772499A publication Critical patent/JPS5772499A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
    • H04R17/08—Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

PURPOSE:To obtain larger displacement and energy, by noticing the polarization state of a piezoelectric element. CONSTITUTION:A power source V1 is applied only to one side of a piezoelectric element to give an auxiliary displacement. This electric field can be applied up to Emax because of the forward direction. A displacement quantity Y1a at this time becomes 3/4h.d31 Emaxl<2>. At the time when an electrostrictive element 3 is operated, the part of the element 1 is short-circuited, and the power source V1 is applied to the part of a piezoelectric element 2, and the sag becomes Y1=Y1a+Y1b= 3/4h.d31 Emaxl<2> similarly. Consequently, displacement Y1=Y1a+Y1b=3/4h.d31 Emaxl<2> is obtained. Therefore, a displacement twice as large as the displacement due to the conventional driving method is obtained in respect to materials which satisfy Emax=4Ep. In said equations, (l) and (h) are the length an the thickness of the vibrator, and d31is a piezoelectric constant.
JP14915380A 1980-10-23 1980-10-23 Method for driving bimorph type electrostrictive vibrator Pending JPS5772499A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14915380A JPS5772499A (en) 1980-10-23 1980-10-23 Method for driving bimorph type electrostrictive vibrator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14915380A JPS5772499A (en) 1980-10-23 1980-10-23 Method for driving bimorph type electrostrictive vibrator

Publications (1)

Publication Number Publication Date
JPS5772499A true JPS5772499A (en) 1982-05-06

Family

ID=15468933

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14915380A Pending JPS5772499A (en) 1980-10-23 1980-10-23 Method for driving bimorph type electrostrictive vibrator

Country Status (1)

Country Link
JP (1) JPS5772499A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4540975A (en) * 1982-04-06 1985-09-10 Marukokeihouki Co., Ltd. Electric horns

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4540975A (en) * 1982-04-06 1985-09-10 Marukokeihouki Co., Ltd. Electric horns

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