WO2011106575A3 - Varying demodulation to avoid interference - Google Patents

Varying demodulation to avoid interference Download PDF

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Publication number
WO2011106575A3
WO2011106575A3 PCT/US2011/026142 US2011026142W WO2011106575A3 WO 2011106575 A3 WO2011106575 A3 WO 2011106575A3 US 2011026142 W US2011026142 W US 2011026142W WO 2011106575 A3 WO2011106575 A3 WO 2011106575A3
Authority
WO
WIPO (PCT)
Prior art keywords
way
demodulated output
resulting signal
sensor device
capacitive sensor
Prior art date
Application number
PCT/US2011/026142
Other languages
French (fr)
Other versions
WO2011106575A2 (en
Inventor
Joseph Kurth Reynolds
Shahrooz Shahparnia
Adam Schwartz
Joel Jordan
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
Priority to JP2012555162A priority Critical patent/JP5822403B2/en
Priority to CN201180021254.6A priority patent/CN102884496B/en
Priority to KR1020127022315A priority patent/KR101843590B1/en
Priority to EP11748099.6A priority patent/EP2539798B1/en
Publication of WO2011106575A2 publication Critical patent/WO2011106575A2/en
Publication of WO2011106575A3 publication Critical patent/WO2011106575A3/en

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Classifications

    • 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
    • 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
    • G06F3/0412—Digitisers structurally integrated in a display
    • 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
    • G06F3/04184—Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/18—Timing circuits for raster scan displays
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate

Abstract

In a method of interference avoidance for a capacitive sensor device, a transmitter signal is transmitted with a transmitter electrode of the capacitive sensor device. A resulting signal is received with a receiver electrode of the capacitive sensor device. The resulting signal corresponds to the transmitter signal. A first demodulated output is acquired by demodulating the resulting signal in a first way. A second demodulated output is acquired by demodulating the resulting signal in a second way, where the second way and the first way differ. A shift is made from using the first demodulated output for determining positional information to using the second demodulated output for determining positional information. The shift is based at least in part upon an amount of interference.
PCT/US2011/026142 2010-02-26 2011-02-24 Varying demodulation to avoid interference WO2011106575A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2012555162A JP5822403B2 (en) 2010-02-26 2011-02-24 Demodulation changes to prevent interference
CN201180021254.6A CN102884496B (en) 2010-02-26 2011-02-24 Modification demodulates to avoid interference
KR1020127022315A KR101843590B1 (en) 2010-02-26 2011-02-24 Varying demodulation to avoid interference
EP11748099.6A EP2539798B1 (en) 2010-02-26 2011-02-24 Varying demodulation to avoid interference

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US30886410P 2010-02-26 2010-02-26
US61/308,864 2010-02-26
US36961710P 2010-07-30 2010-07-30
US61/369,617 2010-07-30

Publications (2)

Publication Number Publication Date
WO2011106575A2 WO2011106575A2 (en) 2011-09-01
WO2011106575A3 true WO2011106575A3 (en) 2011-12-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2011/026142 WO2011106575A2 (en) 2010-02-26 2011-02-24 Varying demodulation to avoid interference

Country Status (6)

Country Link
US (4) US9805692B2 (en)
EP (1) EP2539798B1 (en)
JP (2) JP5822403B2 (en)
KR (1) KR101843590B1 (en)
CN (2) CN105045423B (en)
WO (1) WO2011106575A2 (en)

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