GB2393036A - Electro-active elements & devices - Google Patents

Electro-active elements & devices Download PDF

Info

Publication number
GB2393036A
GB2393036A GB0400664A GB0400664A GB2393036A GB 2393036 A GB2393036 A GB 2393036A GB 0400664 A GB0400664 A GB 0400664A GB 0400664 A GB0400664 A GB 0400664A GB 2393036 A GB2393036 A GB 2393036A
Authority
GB
United Kingdom
Prior art keywords
electro
elongate member
activation
curve
extend along
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
GB0400664A
Other versions
GB2393036B (en
GB0400664D0 (en
Inventor
Anthony Hooley
Ursula Ruth Lenel
David Henry Pearce
Gareth Mckevitt
Mark Richard Shepherd
Gary Lock
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
Publication of GB0400664D0 publication Critical patent/GB0400664D0/en
Publication of GB2393036A publication Critical patent/GB2393036A/en
Application granted granted Critical
Publication of GB2393036B publication Critical patent/GB2393036B/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
    • H10N30/2044—Cantilevers, i.e. having one fixed end having multiple segments mechanically connected in series, e.g. zig-zag 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
    • H10N30/2045—Cantilevers, i.e. having one fixed end adapted for in-plane bending displacement

Landscapes

  • Electroluminescent Light Sources (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
  • Electrotherapy Devices (AREA)
  • Thermistors And Varistors (AREA)

Abstract

An electro-active element comprises at least one elongate member of electro-active material (11) extending along a curve and having two pairs of electrodes (12, 13) spaced across the width W of the elongate member radially of the curve. The electrodes of each pair extend along the length L of the elongate member on opposite sides of the member for developing an electric field across a region of the member therebetween on activation. The material of the elongate member in each region is poled parallel to the electric field to be capable of activation in an expansion-contraction mode with a differential change in length L of the two regions (15, 16) concomitantly with bending of the member parallel to the width of the member so that said bending is concomitant with relative rotation of the ends of the element about an axis on the inner side of the curve. The electro-active element may extend along a helix. The helix may itself extend along a curved axis resulting in a device which twists around the curved axis and concomitantly generates linear displacement between the ends of the device on activation.

Description

GB 2393036 A continuation (72) Inventor(s): Anthony Hooley Ursula Ruth
Lenel David Henry Pearce Gareth McKevitt Mark Richard Shepherd Gary Lock (74) Agent and/or Address for Service: 1... Limited St John's Innovation Centre, Cowley Road, CAMBRIDGE, CB4 OWS, United Kingdom
GB0400664A 2001-06-20 2002-06-19 Electro-active elements & devices Expired - Fee Related GB2393036B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0115064.8A GB0115064D0 (en) 2001-06-20 2001-06-20 Electro-active elements and devices
PCT/GB2002/002854 WO2002103818A2 (en) 2001-06-20 2002-06-19 Electro-active elements & devices

Publications (3)

Publication Number Publication Date
GB0400664D0 GB0400664D0 (en) 2004-02-11
GB2393036A true GB2393036A (en) 2004-03-17
GB2393036B GB2393036B (en) 2004-12-22

Family

ID=9916993

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB0115064.8A Ceased GB0115064D0 (en) 2001-06-20 2001-06-20 Electro-active elements and devices
GB0400664A Expired - Fee Related GB2393036B (en) 2001-06-20 2002-06-19 Electro-active elements & devices

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB0115064.8A Ceased GB0115064D0 (en) 2001-06-20 2001-06-20 Electro-active elements and devices

Country Status (2)

Country Link
GB (2) GB0115064D0 (en)
WO (1) WO2002103818A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9099986B2 (en) * 2011-09-30 2015-08-04 Qualcomm Mems Technologies, Inc. Cross-sectional dilation mode resonators
BR112019009433A2 (en) * 2016-11-14 2019-07-30 Koninklijke Philips Nv actuator device that has an adjustable hardness profile, elongated probe, and method for selectively controlling a hardness profile
EP3540796A1 (en) * 2018-03-15 2019-09-18 Koninklijke Philips N.V. Actuator device based on an electroactive material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999013681A2 (en) * 1997-09-05 1999-03-18 1... Ipr Limited Aerogels, piezoelectric devices, and uses therefor
WO2001095329A1 (en) * 2000-06-08 2001-12-13 Sae Magnetics (H.K.) Ltd. Dual stage actuator systems for high density hard disk drives using annular rotary piezoelectric actuators
WO2002045181A1 (en) * 2000-11-28 2002-06-06 Sae Magnetics (H.K.) Ltd. Head gimbal assembly with piezoelectric microactuator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9618052D0 (en) * 1996-08-29 1996-10-09 Univ Birmingham Piezoelectric elements and devices incorporating same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999013681A2 (en) * 1997-09-05 1999-03-18 1... Ipr Limited Aerogels, piezoelectric devices, and uses therefor
WO2001095329A1 (en) * 2000-06-08 2001-12-13 Sae Magnetics (H.K.) Ltd. Dual stage actuator systems for high density hard disk drives using annular rotary piezoelectric actuators
WO2002045181A1 (en) * 2000-11-28 2002-06-06 Sae Magnetics (H.K.) Ltd. Head gimbal assembly with piezoelectric microactuator

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
IEEE Transactions on Magnetics, Vol 34, No 4, July 1998, pages 1907-1909 *
Japanese Journal of Applied Physics, Vol 40, No 9B, September 2001, pages 5761-5765 *
Piezoelectrics and Acoustooptics, Vol 20, No 5, 1998, pages 308-312 *

Also Published As

Publication number Publication date
WO2002103818A3 (en) 2003-10-30
GB0115064D0 (en) 2001-08-15
WO2002103818A2 (en) 2002-12-27
GB2393036B (en) 2004-12-22
GB0400664D0 (en) 2004-02-11

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Legal Events

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

Effective date: 20110619