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Patent Searching and Data


Title:
TOUCH AND FORCE SENSING FOR INPUT DEVICES
Document Type and Number:
WIPO Patent Application WO/2009/150498
Kind Code:
A3
Abstract:
A device (300) may include a first layer (310), a second layer (320, a third layer (330), a capacitive sensing component (340) coupled to the first layer, and a force sensing component (350) coupled to the first layer (310) and the third layer (330) and configured to detect the amount of force applied to the second layer (320). A method may include monitoring capacitance and voltage at one or more input sensors configured to detect changes in capacitance and to detect changes in applied force, detecting a change in capacitance, activating a capacitance response in response to detecting a change in capacitance, detecting a change in voltage, and activating a force response in response to detecting a change in voltage.

Inventors:
KLINGHULT GUNNAR (SE)
KLEVERMAN MATS (SE)
Application Number:
IB2008/055233
Publication Date:
August 12, 2010
Filing Date:
December 11, 2008
Export Citation:
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Assignee:
SONY ERICSSON MOBILE COMM AB (SE)
KLINGHULT GUNNAR (SE)
KLEVERMAN MATS (SE)
International Classes:
G06F3/041; G06F3/044; G06F3/048
Domestic Patent References:
WO2008000964A12008-01-03
WO1998006079A11998-02-12
WO2003088135A22003-10-23
Foreign References:
US6002389A1999-12-14
US20030234769A12003-12-25
US4555953A1985-12-03
US20080007532A12008-01-10
EP1109382A22001-06-20
US20010026636A12001-10-04
Other References:
EVANS J T ET AL: "FR016: Constructing a pyroelectric/piezoelectric sensor using a PNZT capacitor", APPLICATIONS OF FERROELECTRICS, 2008. ISAF 2008. 17TH IEEE INTERNATIONAL SYMPOSIUM ON THE, IEEE, PISCATAWAY, NJ, USA, 23 February 2008 (2008-02-23), pages 1 - 4, XP031367331, ISBN: 978-1-4244-2744-4
DARGAHI J: "Piezoelectric and pyroelectric transient signal analysis for detection of the temperature of a contact object for robotic tactile sensing", SENSORS AND ACTUATORS A, ELSEVIER SEQUOIA S.A., LAUSANNE, CH LNKD- DOI:10.1016/S0924-4247(98)00159-9, vol. 71, no. 1-2, 1 November 1998 (1998-11-01), pages 89 - 97, XP004140079, ISSN: 0924-4247
Attorney, Agent or Firm:
SIMKOVIC, Viktor et al. (LLP11350 Random Hills Road, Suite 60, Fairfax Virginia, US)
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