WO2012142182A3 - Capacitive input device interference detection and operation - Google Patents

Capacitive input device interference detection and operation Download PDF

Info

Publication number
WO2012142182A3
WO2012142182A3 PCT/US2012/033155 US2012033155W WO2012142182A3 WO 2012142182 A3 WO2012142182 A3 WO 2012142182A3 US 2012033155 W US2012033155 W US 2012033155W WO 2012142182 A3 WO2012142182 A3 WO 2012142182A3
Authority
WO
WIPO (PCT)
Prior art keywords
input device
capacitive input
mode
interference
sensing
Prior art date
Application number
PCT/US2012/033155
Other languages
French (fr)
Other versions
WO2012142182A2 (en
Inventor
Adam Schwartz
Tracy Scott Dattalo
Robin Hodgson
Original Assignee
Synaptics Incorporated
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 Synaptics Incorporated filed Critical Synaptics Incorporated
Publication of WO2012142182A2 publication Critical patent/WO2012142182A2/en
Publication of WO2012142182A3 publication Critical patent/WO2012142182A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/962—Capacitive touch switches
    • H03K17/9622—Capacitive touch switches using a plurality of detectors, e.g. keyboard
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04182—Filtering of noise external to the device and not generated by digitiser components
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/960705—Safety of capacitive touch and proximity switches, e.g. increasing reliability, fail-safe

Abstract

A processing system for a capacitive input device comprises sensor circuitry and control logic. The sensor circuitry is configured to be communicatively coupled with sensor electrodes of the capacitive input device. The control logic is configured to operate the capacitive input device in a first mode comprising interference sensing at a first level and input object sensing. The control logic is also configured to operate the capacitive input device in a second mode instead of in the first mode in response to: interference measured in the first mode meeting an interference condition; and a determination that input is in a sensing region of the capacitive input device. While operating in the second mode, interference sensing with the capacitive input device is either not performed or else is performed at a second level that is lower in fidelity than the first level.
PCT/US2012/033155 2011-04-15 2012-04-11 Capacitive input device interference detection and operation WO2012142182A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201161476142P 2011-04-15 2011-04-15
US61/476,142 2011-04-15
US13/240,377 2011-09-22
US13/240,377 US9564894B2 (en) 2011-04-15 2011-09-22 Capacitive input device interference detection and operation

Publications (2)

Publication Number Publication Date
WO2012142182A2 WO2012142182A2 (en) 2012-10-18
WO2012142182A3 true WO2012142182A3 (en) 2013-01-24

Family

ID=47005976

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/033155 WO2012142182A2 (en) 2011-04-15 2012-04-11 Capacitive input device interference detection and operation

Country Status (2)

Country Link
US (1) US9564894B2 (en)
WO (1) WO2012142182A2 (en)

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US9268431B2 (en) 2010-08-27 2016-02-23 Apple Inc. Touch and hover switching
JP2014512606A (en) 2011-03-29 2014-05-22 シナプティクス インコーポレイテッド Capacitive touch screen interference detection and operation
US9201547B2 (en) * 2012-04-30 2015-12-01 Apple Inc. Wide dynamic range capacitive sensing
US20130328821A1 (en) * 2012-06-06 2013-12-12 Synaptics Incorporated System and method for gradient imaging sensors
US9933879B2 (en) 2013-11-25 2018-04-03 Apple Inc. Reconfigurable circuit topology for both self-capacitance and mutual capacitance sensing
US9600121B2 (en) * 2014-04-25 2017-03-21 Synaptics Incorporated Driving sensor electrodes for noise measurement
US9304643B2 (en) 2014-06-24 2016-04-05 Synaptics Incorporated Classifying input objects interacting with a capacitive button
US20170046005A1 (en) * 2015-08-12 2017-02-16 Cirque Corporation Avoiding noise when using multiple capacitive measuring integrated circuits
US20190042056A1 (en) * 2015-08-12 2019-02-07 Cirque Corporation Avoiding noise when using multiple capacitive measuring integrated circuits
US10635246B2 (en) 2017-03-10 2020-04-28 Cypress Semiconductor Corporation Capacitance sensing and inductance sensing in different modes
US10181872B1 (en) * 2017-07-21 2019-01-15 Synaptics Incorporated Impulse response filtering of code division multiplexed signals in a capacitive sensing device

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US20030210235A1 (en) * 2002-05-08 2003-11-13 Roberts Jerry B. Baselining techniques in force-based touch panel systems
US20060227115A1 (en) * 2005-03-31 2006-10-12 Tyco Electronic Corporation Method and apparatus for touch sensor with interference rejection
US20080158169A1 (en) * 2007-01-03 2008-07-03 Apple Computer, Inc. Noise detection in multi-touch sensors
US20080309628A1 (en) * 2007-06-13 2008-12-18 Apple Inc. Detection of low noise frequencies for multiple frequency sensor panel stimulation

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US8479122B2 (en) * 2004-07-30 2013-07-02 Apple Inc. Gestures for touch sensitive input devices
US8125456B2 (en) 2007-01-03 2012-02-28 Apple Inc. Multi-touch auto scanning
US7986313B2 (en) 2007-01-03 2011-07-26 Apple Inc. Analog boundary scanning based on stray capacitance
US7439755B2 (en) 2007-01-31 2008-10-21 International Business Machines Corporation Electronic circuit for measurement of transistor variability and the like
US7920134B2 (en) 2007-06-13 2011-04-05 Apple Inc. Periodic sensor autocalibration and emulation by varying stimulus level
US9927924B2 (en) 2008-09-26 2018-03-27 Apple Inc. Differential sensing for a touch panel
DE102009046177A1 (en) 2008-10-30 2010-06-10 Samsung Electronics Co., Ltd., Suwon Touch data generator
US8314779B2 (en) * 2009-02-23 2012-11-20 Solomon Systech Limited Method and apparatus for operating a touch panel
US8643624B2 (en) 2009-03-18 2014-02-04 Synaptics Incorporated Capacitive sensing using a segmented common voltage electrode of a display
JP5203293B2 (en) 2009-05-21 2013-06-05 株式会社ジャパンディスプレイウェスト Display device and electronic device
US8576161B2 (en) * 2009-06-18 2013-11-05 Apple Inc. Driving an OLED display structure integrated with a touch sensor configuration
US8970506B2 (en) * 2009-09-11 2015-03-03 Apple Inc. Power management for touch controller
US9036650B2 (en) * 2009-09-11 2015-05-19 Apple Inc. Automatic low noise frequency selection
JP5419153B2 (en) * 2009-10-22 2014-02-19 Ｎｅｃカシオモバイルコミュニケーションズ株式会社 Touch detection device, electronic device, and program
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Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030210235A1 (en) * 2002-05-08 2003-11-13 Roberts Jerry B. Baselining techniques in force-based touch panel systems
US20060227115A1 (en) * 2005-03-31 2006-10-12 Tyco Electronic Corporation Method and apparatus for touch sensor with interference rejection
US20080158169A1 (en) * 2007-01-03 2008-07-03 Apple Computer, Inc. Noise detection in multi-touch sensors
US20080309628A1 (en) * 2007-06-13 2008-12-18 Apple Inc. Detection of low noise frequencies for multiple frequency sensor panel stimulation

Also Published As

Publication number Publication date
WO2012142182A2 (en) 2012-10-18
US9564894B2 (en) 2017-02-07
US20120262222A1 (en) 2012-10-18

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