GB2364169A - Electro-active devices - Google Patents

Electro-active devices

Info

Publication number
GB2364169A
GB2364169A GB0124440A GB0124440A GB2364169A GB 2364169 A GB2364169 A GB 2364169A GB 0124440 A GB0124440 A GB 0124440A GB 0124440 A GB0124440 A GB 0124440A GB 2364169 A GB2364169 A GB 2364169A
Authority
GB
United Kingdom
Prior art keywords
electro
minor axis
active
active structure
around
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
GB0124440A
Other versions
GB2364169B (en
GB0124440D0 (en
Inventor
Anthony Hooley
David Pearce
Ursula Ruth Lenel
Gareth Mckevitt
Mark Richard Shepherd
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.)
1 Ltd
Original Assignee
1 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
Priority claimed from GBGB9930010.5A external-priority patent/GB9930010D0/en
Priority claimed from GB0020941A external-priority patent/GB0020941D0/en
Application filed by 1 Ltd filed Critical 1 Ltd
Priority to GB0124440A priority Critical patent/GB2364169B/en
Priority claimed from PCT/GB2000/004949 external-priority patent/WO2001047041A2/en
Publication of GB0124440D0 publication Critical patent/GB0124440D0/en
Publication of GB2364169A publication Critical patent/GB2364169A/en
Application granted granted Critical
Publication of GB2364169B publication Critical patent/GB2364169B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
    • H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2217/00—Details of magnetostrictive, piezoelectric, or electrostrictive transducers covered by H04R15/00 or H04R17/00 but not provided for in any of their subgroups
    • H04R2217/01—Non-planar magnetostrictive, piezoelectric or electrostrictive benders

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Thermistors And Varistors (AREA)

Abstract

The present invention relates to an electro-active device having an electro-active structure extending along a minor axis (36) which is curved, for example in a helix around a major axis (37). The electro-active structure comprises successive electro-active portions (35) extending around said minor axis and arranged with electrodes to bend, when activated, around the minor axis (36) such that bending of the successive portions (35) is concomitant with rotation of the electro-active structure about the minor axis (36) adding incrementally along the minor axis (36). The electro-active structure generates displacement out of the local plane in which the minor axis is curved. The electro-active structure may be continuous electro-active member (35) extending along and curving around the minor axis (35), for example helically to form a helical helix. Alternatively, the electro-active structure may be a plurality of discrete elements (211) connected together. The electro-active portions preferably have a bender structure formed from a plurality of layers. The device may be used as a driver, a sensor or a generator.
GB0124440A 1999-12-21 2000-12-21 Electro-active devices Expired - Fee Related GB2364169B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0124440A GB2364169B (en) 1999-12-21 2000-12-21 Electro-active devices

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GBGB9930010.5A GB9930010D0 (en) 1999-12-21 1999-12-21 Piezoelectric devices, and uses therefor
GBGB0003136.9A GB0003136D0 (en) 1999-12-21 2000-02-14 Piezoelectric devices and uses therefor
GB0020941A GB0020941D0 (en) 1999-12-21 2000-08-24 Electro-active devices
PCT/GB2000/004949 WO2001047041A2 (en) 1999-12-21 2000-12-21 Electro-active devices
GB0124440A GB2364169B (en) 1999-12-21 2000-12-21 Electro-active devices

Publications (3)

Publication Number Publication Date
GB0124440D0 GB0124440D0 (en) 2001-12-05
GB2364169A true GB2364169A (en) 2002-01-16
GB2364169B GB2364169B (en) 2002-09-18

Family

ID=27447785

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0124440A Expired - Fee Related GB2364169B (en) 1999-12-21 2000-12-21 Electro-active devices

Country Status (1)

Country Link
GB (1) GB2364169B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1976036A3 (en) * 2007-03-30 2009-07-22 Tokai Rubber Industries, Ltd. Actuator

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1945448A1 (en) * 1969-09-08 1971-03-11 Siemens Ag Piezoelectrically driven bending body, especially for clocks and relays
US3816774A (en) * 1972-01-28 1974-06-11 Victor Company Of Japan Curved piezoelectric elements
US3900748A (en) * 1972-01-31 1975-08-19 Zenith Radio Corp Torsional ceramic transducer
US4601539A (en) * 1983-05-07 1986-07-22 Canon Kabushiki Kaisha Lens moving device using piezoelectric material
US5526601A (en) * 1993-12-14 1996-06-18 Kureha Kagaku Kogyo Kabushiki Kaisha Flexure sensor and fishing rod equipped therewith
WO1998009339A1 (en) * 1996-08-29 1998-03-05 The University Of Birmingham Piezoelectric elements and devices incorporating same
GB2329514A (en) * 1997-09-05 1999-03-24 1 Ipr Limited Piezoelectric devices, aerogels and uses therefore

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1945448A1 (en) * 1969-09-08 1971-03-11 Siemens Ag Piezoelectrically driven bending body, especially for clocks and relays
US3816774A (en) * 1972-01-28 1974-06-11 Victor Company Of Japan Curved piezoelectric elements
US3900748A (en) * 1972-01-31 1975-08-19 Zenith Radio Corp Torsional ceramic transducer
US4601539A (en) * 1983-05-07 1986-07-22 Canon Kabushiki Kaisha Lens moving device using piezoelectric material
US5526601A (en) * 1993-12-14 1996-06-18 Kureha Kagaku Kogyo Kabushiki Kaisha Flexure sensor and fishing rod equipped therewith
WO1998009339A1 (en) * 1996-08-29 1998-03-05 The University Of Birmingham Piezoelectric elements and devices incorporating same
GB2329514A (en) * 1997-09-05 1999-03-24 1 Ipr Limited Piezoelectric devices, aerogels and uses therefore

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DS Dancila et al, Adaptive Structures and Material Systems 1998. ASME International Mechanical Engineering Congress and Exposition, pages 83-87 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1976036A3 (en) * 2007-03-30 2009-07-22 Tokai Rubber Industries, Ltd. Actuator

Also Published As

Publication number Publication date
GB2364169B (en) 2002-09-18
GB0124440D0 (en) 2001-12-05

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20101221