WO2011023856A1 - Agencement de détecteur de gestes et procédé de fabrication correspondant - Google Patents

Agencement de détecteur de gestes et procédé de fabrication correspondant Download PDF

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Publication number
WO2011023856A1
WO2011023856A1 PCT/FI2010/050672 FI2010050672W WO2011023856A1 WO 2011023856 A1 WO2011023856 A1 WO 2011023856A1 FI 2010050672 W FI2010050672 W FI 2010050672W WO 2011023856 A1 WO2011023856 A1 WO 2011023856A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrodes
conductive
sensor arrangement
ink
gesture sensor
Prior art date
Application number
PCT/FI2010/050672
Other languages
English (en)
Inventor
Antti Kemppainen
Tapio HEIKKILÄ
Esko Strömmer
Original Assignee
Valtion Teknillinen Tutkimuskeskus
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 Valtion Teknillinen Tutkimuskeskus filed Critical Valtion Teknillinen Tutkimuskeskus
Publication of WO2011023856A1 publication Critical patent/WO2011023856A1/fr

Links

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
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
    • H05K3/04—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed mechanically, e.g. by punching
    • H05K3/046—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed mechanically, e.g. by punching by selective transfer or selective detachment of a conductive layer
    • H05K3/048—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed mechanically, e.g. by punching by selective transfer or selective detachment of a conductive layer using a lift-off resist pattern or a release layer pattern
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/12—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns

Definitions

  • Gesture sensor arrangement and a method for producing it
  • the invention relates to sensors.
  • the invention relates to capacitive proximity sensors.
  • Such sensors comprise of electrodes sensing capacitance changes, readout electronics and processing unit and/or display unit.
  • the invention relates to a method for manufacturing a sensor.
  • Touch-sensitive resistive and capacitive sensors have also been widely used for controlling mobile phones and other devices. Some modern electronic devices take advantage of recognition of gestures of the user of the device, without the need of the user to touch the device. Gestures can also be detected using capacitive sensors (gesture sensors). Such sensors are known, for example, from the article Thracker - Using Capacitive Sensing for Gesture Recognition, Raphael Wimmer et. al, University of Kunststoff, Research Group Embedded Interaction, Kunststoff 2006. The sensor arrangement described in this publication comprises four capacitive input sensors arranged around a display. By means of the sensors, two dimensional pointing and gestures as input primitives can be recognized for controlling images shown in the display.
  • gesture sensor which is inexpensive to manufacture, even in applications requiring very large sensing area or sufficiently long sensing distance. It is also an aim to provide an easily customizable method of inexpensively manufacturing gesture sensors for various needs, and potentially in thin flexible format.
  • One aim of the invention is to provide a sensor design and manufacturing method for large gesture sensors (> 0.25 m 2 ) operated by the movement of a whole limb, for example, instead of fingers. Additionally non-touching sensors enable application where sensing is done through solid material, like wooden table, wall paper etc. This lead to potentially hidden, hygienic or vandal proof sensors.
  • the aims of the invention are achieved by the solutions as defined in the independent claims.
  • the invention is based on the finding that printing technology can be used to inexpensively form conductive electrodes, which are capable of capacitively couple to human limb well enough to be able to form a gesture sensor.
  • the gesture sensor arrangement comprises
  • each of the electrodes being individually designed to capacitively couple to a human limb acting as a pointer, in the vicinity of the electrode, and
  • sensing electronics such as capacitance changes sensing electronics, functionally connected to said electrodes, the sensing electronics being capable of measuring said coupling of the electrodes to the limb and determining a position and/or movement of the limb based on said measurement with respect to the array.
  • any other object capable of capacitively coupling to printed conductive electrodes or having different permeability or higher conductivity than its surroundings can be used as a pointer.
  • the method may comprise
  • a further aim of the invention is to provide a gesture sensor arrangement which can be used at a relatively long distance from the sensor surface. This is solved by using printed electrodes having an area of at least 25 cm 2 , in particular at least 100 cm 2 , preferably at least 300 cm 2 each. The operational distance of such arrangement is of the order of several centimeters, even tens of centimeters.
  • the electrode array may have a total area of at least 0.25 m 2 , in particular at least 1 m 2 , for achieving a limb- or whole body-operated gesture sensor, in contrast to existing finger- operated small-scale gesture sensors.
  • the conductive ink is conductive particle ink, such as graphite particle ink or metal particle ink.
  • the ink is conductive polymer ink.
  • Graphite particle inks and conductive polymer inks are particularly suitable for the electrodes because of their low price, whereas metal particle inks are particularly suitable for wiring patterns of the sensor because of their high conductivity. Of particular importance are copper and silver particle inks.
  • the wiring patterns are printed with conductive ink having a higher conductivity better than printing ink used for printing the conductive zones of the electrodes.
  • the same of different printing processes can be used for producing the electrodes and the wiring pattern.
  • the electrodes are formed in a first printing process and at least part of the wiring patterns in a second printing process after the first printing process, or vice versa.
  • At least one of the electrodes can patterned so as to exhibit a grid structure.
  • Each of the electrodes is individually coupled to the sensing electronics such that their individual degrees of coupling to their surroundings can be determined through capacitance measurement.
  • capacitance measurement can be achieved by providing means for simultaneously measuring the capacitances or, preferably, by a suitable multiplexing circuitry which measures the electrodes sequentially.
  • Fig. 1 illustrates a gesture sensor arrangement according to one embodiment of the invention.
  • Fig. 2 illustrates a gesture sensor arrangement according to another embodiment of the invention.
  • Fig. 3 shows schematically a gesture sensor of the present kind in use.
  • Fig. 4 shows a cross-sectional view of a substrate with a sensing electrode and wiring structure applied thereon.
  • Fig. 5 shows a graph of electrode intensity vs. distance of hand from the electrode.
  • Fig. 6 shows a detailed view of an array of electrodes constructed according to one embodiment.
  • gesture sensor refers to a sensor which is responsive to the presence or movement of an object in its vicinity remotely, i.e. without touching the sensor. In particular, no galvanic contact is required. Both location and movement can be detected using the gesture sensor according to the invention. Thus, the term “gesture” covers, in addition to movement also stationary pointing.
  • capacitive in this context means that the sensing in based on capacitive coupling of the sensor.
  • One-electrode” measurement principle refers to a measurement where the capacitive coupling of the sensor directly to the object concerned is measured, in contrast to "two- electrode” systems where the mutual capacitance between two floating electrodes is measured. The one-electrode concept provides for much longer measurement distances.
  • intensity of an electrode refers to a degree of its capacitive coupling to the object used to make gestures.
  • Array refers to any geometrical arrangement in which at least two electrodes are arranged laterally with respect to each other in order to provide spatial resolution to the gesture sensor.
  • the array is a N by M matrix, where N and M are integers, but the array may be of any other suitable form, depending on the intended use of the gesture sensor.
  • Conductive ink refers to any printable ink which is capable of forming an electrically conductive layer on a substrate.
  • Multiplexing refers to temporally sequential measurement of the individual electrodes of the sensor array.
  • a gesture sensor according to the invention can be implemented as a multi-element capacitive gesture sensor in which the spatial discrimination is achieved by measuring the absolute and/or relative intensities of individual electrodes simultaneously or by multiplexing.
  • Fig. 1 shows a sensor array 10 comprising a 4 by 4 rectangular matrix of conductive electrodes 12. The electrodes are connected by electrical conductors 14 to sensing electronics 16 and further to a data processing means 18, such as a computer. The system of Fig. 1 is capable of measuring each individual electrode 12 simultaneously.
  • Fig. 2 shows an alternative sensor array 20 comprising a 4 by 4 rectangular matrix of conductive electrodes 22, which are connected row- and column-wise by first electrical conductors 24A and second electrical conductors 24B, respectively, to multiplexing circuitry 26A and 26B and further to data processing means 28.
  • the system of Fig. 2 is capable of measuring the individual electrodes in a specific temporal order by multiplexing.
  • electrodes can be arranged in a line array having vertical and horizontal lines shown in figure 6.
  • the vertical and horizontal lines are electricially insulated in crossing areas by printed insulator, or so that they are printed in different sides of the substrates. Capacitance sensing area is maximized by the diagonal rectangles, but crosstalk is minimized by use of small crossing area (thin lines between rectangles).
  • Location data can be measured by measuring all vertical and horizontal lines, and finding crossing point of signal maximum in horizontal and vertical electrodes.
  • Fig. 3 shows a gesture sensor 30 in use.
  • the user of the device uses his hand 31 to make gestures 33 in front of the gesture sensor 30 to provide a data signal for data processing means.
  • the data processing means 38 analyses the data signal. For example, it may determine whether the gesture made corresponds to a particular location or a pre-stored trail of movement, which triggers further actions.
  • a further device such as a monitor, can be controlled.
  • Fig. 4 shows a substrate 45 on top of which an electrode layer 42 has been printed. On top of the electrode layer 42 there is provided a wiring layer 44, partly overlapping with the electrode layer.
  • the electrodes and at least part of the wiring patterns can be produced by roll-to-roll printing techniques using one or more conductive inks.
  • Preferred printing techniques include silk, flexographic, gravure and inkjet printing.
  • Preferred conductive inks are silver ink and graphite ink, belonging to the group of particle inks, and conductive polymer inks. Any metal or metal oxide inks may also be used.
  • Polymer can also be in particle form, but preferably it is in suspended or colloidal form in a solvent. Suitable polymers are readily commercially available in the art.
  • the electrodes are printed with graphite ink and the wiring patterns with silver ink for reducing costs and wiring resistances.
  • Printing a suitably conductive layer with graphite ink presently cost about 20 cents/m 2 , whereas silver inks cost about 10 €/m 2 . It has been confirmed experimentally that graphite ink have been conductivity of 1 k ⁇ square.
  • the electrodes and at least first part of the wirings can be made using roll printing, after which wirings of one or a plurality of such units can be connected as a system and/or to sensing circuitry using digital printing.
  • sensors much larger than dictated by the size of the roll used in the roll printing phase can be implemented.
  • part of the electrod and or wiring structure can also be manufactured by using e.g. vacuum deposition.
  • Vacuum deposion forms veri thin layers of solid metal.
  • these layers can be patterned using laser ablation or a lift-off method.
  • laser ablation the metal is removed selectively using laser for evaporation of metal.
  • lift of method an ink layer is printed before the metal evaporation (coating) to area where metal is not wanted. After evaporation ink and metal on top of that can be removed using e.g. ultrasonic washing.
  • vacuum coated layers can be patterned using etching.
  • Etchant may be directly printed to areas where conductive layer need to be removed.
  • a printed etch mask can be used to pattern wet etching process.
  • Printing method allows for efficient integration of gesture sensors to various surfaces, which is more difficult with metallic electrodes.
  • the electrodes are not perfectly uniform, but patterned as a network structure. This reduces the consumption of ink without unacceptable loss of sensitivity.
  • an “intelligent wallpaper” which can detect gestures made in front of it or people passing thereby; a “touchless keyboard” on a wall or floor, or a integrated location or movement detection on a floor, wall or piece of furniture.
  • gesture recognition system can be implemeted as follows:
  • Electrode sizes are 25 x 10 cm and there are located on a same substrate 3 cm apart from each other. Electrodes are located top of each other and so forming a sensing area of about 25 x 36 cm (longer dimension vertical). Each electrode can be wired to measurement electronics.
  • the processing unit measures signal from each electrode. If it is recognized than sequentially significantly larger (above detection threshold) signal (compared to other electrodes) is detected first on topmost electrode then the middle electrode and last on lowest electrode, it can be interpreted that user has waved his hand from top down in front of the electrodes. This can be interpreted e.g as swith off signal. Is the order is opposite, user gesture can be interpreted as 'switch on'.
  • the sensor foil can be embedded e.g. between wall elements and wall paper.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

L'invention concerne un agencement de détecteur de gestes ainsi qu'un procédé de fabrication de celui-ci. Selon l'invention, le capteur comprend une pluralité d'électrodes conductrices (12) disposées en réseau sur un substrat, chacune de ces électrodes (12) étant individuellement conçue pour un couplage capacitif à un objet, en particulier un membre humain (31), à proximité de l'électrode (12). Le capteur comprend également des éléments électroniques de détection (16) connectés de manière fonctionnelle auxdites électrodes (12), les éléments électroniques de détection (16) étant capables de mesurer ledit couplage des électrodes et de déterminer la position dudit objet sur la base de ladite mesure. Les électrodes présentent en outre des zones conductrices imprimées par encre conductrice.
PCT/FI2010/050672 2009-08-26 2010-08-26 Agencement de détecteur de gestes et procédé de fabrication correspondant WO2011023856A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20095880A FI20095880A0 (fi) 2009-08-26 2009-08-26 Menetelmä sensorin valmistamiseksi ja sensori
FI20095880 2009-08-26

Publications (1)

Publication Number Publication Date
WO2011023856A1 true WO2011023856A1 (fr) 2011-03-03

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PCT/FI2010/050672 WO2011023856A1 (fr) 2009-08-26 2010-08-26 Agencement de détecteur de gestes et procédé de fabrication correspondant

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FI (1) FI20095880A0 (fr)
WO (1) WO2011023856A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2499987A (en) * 2012-03-02 2013-09-11 Novalia Ltd Touch-sensitive input device
GB2499851B (en) * 2012-03-02 2016-11-02 Novalia Ltd Touch-sensitive input device
EP2672365A3 (fr) * 2012-06-05 2017-11-29 Acer Incorporated Procédé de commande pour panneau tactile et son dispositif d'activation par pression
CN109782616A (zh) * 2018-12-29 2019-05-21 青岛海尔空调器有限总公司 基于感应阵列的控制方法、装置、存储介质及计算机设备
US10359929B2 (en) 2015-11-09 2019-07-23 Analog Devices, Inc. Slider and gesture recognition using capacitive sensing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996018179A1 (fr) * 1994-12-07 1996-06-13 Cirque Corporation Appareil et procedes pour capteurs de proximite a capacitance eliminant les parasites
GB2423808A (en) * 2005-03-04 2006-09-06 Ford Global Tech Llc Gesture controlled system for controlling vehicle accessories
US20080202912A1 (en) * 2006-10-30 2008-08-28 T-Ink, Inc. Proximity sensor for a vehicle
US20080238706A1 (en) * 2005-09-20 2008-10-02 David Norris Kenwright Apparatus and Method for Proximity-Responsive Display Materials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996018179A1 (fr) * 1994-12-07 1996-06-13 Cirque Corporation Appareil et procedes pour capteurs de proximite a capacitance eliminant les parasites
GB2423808A (en) * 2005-03-04 2006-09-06 Ford Global Tech Llc Gesture controlled system for controlling vehicle accessories
US20080238706A1 (en) * 2005-09-20 2008-10-02 David Norris Kenwright Apparatus and Method for Proximity-Responsive Display Materials
US20080202912A1 (en) * 2006-10-30 2008-08-28 T-Ink, Inc. Proximity sensor for a vehicle

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2499987A (en) * 2012-03-02 2013-09-11 Novalia Ltd Touch-sensitive input device
CN104220969A (zh) * 2012-03-02 2014-12-17 诺瓦利亚公司 触敏输入装置
GB2499851B (en) * 2012-03-02 2016-11-02 Novalia Ltd Touch-sensitive input device
GB2499987B (en) * 2012-03-02 2017-01-11 Novalia Ltd Touch-sensitive input device
US9652092B2 (en) 2012-03-02 2017-05-16 Novalia Ltd Touch-sensitive input device
US9762235B2 (en) 2012-03-02 2017-09-12 Novalia Ltd Touch-sensitive input device
EP2672365A3 (fr) * 2012-06-05 2017-11-29 Acer Incorporated Procédé de commande pour panneau tactile et son dispositif d'activation par pression
US10359929B2 (en) 2015-11-09 2019-07-23 Analog Devices, Inc. Slider and gesture recognition using capacitive sensing
CN109782616A (zh) * 2018-12-29 2019-05-21 青岛海尔空调器有限总公司 基于感应阵列的控制方法、装置、存储介质及计算机设备
CN109782616B (zh) * 2018-12-29 2022-01-21 青岛海尔空调器有限总公司 基于感应阵列的控制方法、装置、存储介质及计算机设备

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