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GB2375884B - Electro-active devices - Google Patents

Electro-active devices

Info

Publication number
GB2375884B
GB2375884B GB0112620A GB0112620A GB2375884B GB 2375884 B GB2375884 B GB 2375884B GB 0112620 A GB0112620 A GB 0112620A GB 0112620 A GB0112620 A GB 0112620A GB 2375884 B GB2375884 B GB 2375884B
Authority
GB
United Kingdom
Prior art keywords
minor axis
electro
around
active
curved
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.)
Expired - Fee Related
Application number
GB0112620A
Other versions
GB2375884A (en
GB0112620D0 (en
Inventor
Gary Lock
Mark Richard Shepherd
Anthony Hooley
Gareth Mckevitt
David Pearce
Ursula Ruth Lenel
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
Application filed by 1 Ltd filed Critical 1 Ltd
Priority to GB0112620A priority Critical patent/GB2375884B/en
Publication of GB0112620D0 publication Critical patent/GB0112620D0/en
Publication of GB2375884A publication Critical patent/GB2375884A/en
Application granted granted Critical
Publication of GB2375884B publication Critical patent/GB2375884B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H10N30/2041—Beam type
    • H10N30/2042—Cantilevers, i.e. having one fixed end
    • H10N30/2043—Cantilevers, i.e. having one fixed end connected at their free ends, e.g. parallelogram type
    • 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
    • H10N30/2041—Beam type
    • H10N30/2042—Cantilevers, i.e. having one fixed end

Landscapes

  • Gyroscopes (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

The device has a layered piezoelectric structure extending along a minor axis 36 which is curved, for example in a helix around a major axis 37. The structure comprises successive portions extending around said minor axis and arranged with electrodes to bend 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 structure generates displacement out of the local plane in which the minor axis is curved. The layers of the structure are arranged at an angle a of less than 90{ to the minor axis 36 (see fig 5). The structure may be corrugated 141. The structure may be a continuous electro-active member 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 connected together. The device may be used as a driver, a sensor or a generator.
GB0112620A 2001-05-23 2001-05-23 Electro-active devices Expired - Fee Related GB2375884B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0112620A GB2375884B (en) 2001-05-23 2001-05-23 Electro-active devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0112620A GB2375884B (en) 2001-05-23 2001-05-23 Electro-active devices

Publications (3)

Publication Number Publication Date
GB0112620D0 GB0112620D0 (en) 2001-07-18
GB2375884A GB2375884A (en) 2002-11-27
GB2375884B true GB2375884B (en) 2005-01-05

Family

ID=9915193

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0112620A Expired - Fee Related GB2375884B (en) 2001-05-23 2001-05-23 Electro-active devices

Country Status (1)

Country Link
GB (1) GB2375884B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2405256B (en) * 2001-06-20 2005-08-31 1 Ltd Electro-active device
GB2376795B (en) * 2001-06-20 2005-03-09 1 Ltd Electro-mechanical control using an electro-active device
GB0115074D0 (en) * 2001-06-20 2001-08-15 1 Ltd Sensors using an electro-active device
GB2376796B (en) * 2001-06-20 2004-12-15 1 Ltd Motors and generators using an electro-active device
GB0201458D0 (en) * 2002-01-23 2002-03-13 1 Ltd Curved electro-active actuators
GB0308810D0 (en) * 2003-04-16 2003-05-21 1 Ltd Recurved electro-active actuators
EP1851808B1 (en) * 2005-02-15 2013-08-14 Nokia Corporation Piezoelectric actuator element for micromovement
DE102005026717B4 (en) 2005-06-09 2016-09-15 Epcos Ag Piezoelectric multilayer component

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001047041A2 (en) * 1999-12-21 2001-06-28 1... Limited Electro-active devices

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001047041A2 (en) * 1999-12-21 2001-06-28 1... Limited Electro-active devices

Also Published As

Publication number Publication date
GB2375884A (en) 2002-11-27
GB0112620D0 (en) 2001-07-18

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Legal Events

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

Effective date: 20110523