EP2208129A1 - Ecrans ou pavés tactiles single touch ou multitouch composés d'un système de capteurs de pression et fabrication de tels capteurs - Google Patents

Ecrans ou pavés tactiles single touch ou multitouch composés d'un système de capteurs de pression et fabrication de tels capteurs

Info

Publication number
EP2208129A1
EP2208129A1 EP08841152A EP08841152A EP2208129A1 EP 2208129 A1 EP2208129 A1 EP 2208129A1 EP 08841152 A EP08841152 A EP 08841152A EP 08841152 A EP08841152 A EP 08841152A EP 2208129 A1 EP2208129 A1 EP 2208129A1
Authority
EP
European Patent Office
Prior art keywords
touchscreen
sensors
display
pressure
touchpad
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.)
Withdrawn
Application number
EP08841152A
Other languages
German (de)
English (en)
Inventor
Milosch Meriac
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2208129A1 publication Critical patent/EP2208129A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/205—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using distributed sensing elements
    • 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
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G06F3/04144—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position using an array of force sensing means
    • 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
    • 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
    • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Definitions

  • the invention relates to touchscreen or touchpad that determines the position of the touch.
  • the touch screen technology is becoming increasingly popular, since an immediate interaction with the device with immediate feedback on the screen is possible.
  • the space saving is particularly relevant for mobile devices, as the display and touch interface combined take up less space than display plus eg a keyboard.
  • touchpads ie touch-sensitive surfaces
  • touchpads are the most common replacement for a mouse today, eg for notebooks.
  • multitouch capable touch devices touchscreen screen or touchpad
  • a completely new interaction for example, with several people simultaneously on a display possible.
  • Multitouch-capable two-dimensional input devices are nowadays usually realized by means of imaging processes or via transparent, capacitive sensor arrays above the display.
  • the use of inductive methods is conceivable.
  • an infrared camera "views" a semitransparent projection surface made of glass or acrylic, onto which the computer image to be displayed is projected from below using a beamer.
  • the pane is illuminated laterally with infrared light. Now, if one or more fingers touch the screen, the refractive index of the lens changes at that point, and in the image of the infrared camera you can see the finger or fingers (and only these) as dots.
  • the change in the capacitance of one or more sensors is measured when a finger or other dielectric approaches.
  • the position of one or more fingers can now be calculated from interpolation of the signals of various sensors arranged as an array.
  • Capacitive sensors are susceptible to interference and can not penetrate today's conventional display. Therefore, the indium-tin-oxide-based sensors must be made transparent and positioned above the display. Since indium is one of the rarest elements of the earth, such interfaces are very expensive. In addition, they are not perfectly transparent, so that the readability of the screen suffers and possibly reflective effects on the interface can interfere. Inductive methods are based on the strongly disturbing aspect that they only contain special pins that contain electronic components. Touchscreen or touchpad Interfaces, where only one finger can be detected, are realized in different ways today.
  • pressure sensor arrays which are used to measure as accurately as possible the different pressure conditions on a surface, e.g. for medical purposes
  • the indicated in claim 1 invention is based on the problem of producing a single or multi-touch display or touchpad very efficient and inexpensive, which is both robust and insensitive interference is, as well as miniaturize easily and can be used in mobile devices.
  • This object is achieved by a device having the features of the independent claims.
  • the object is achieved by pressure sensors (3) which are arranged as a two-dimensional array on a bottom surface (1) and are provided with signal lines (2) so that each sensor can be evaluated individually.
  • On this array is a thin and thus flexible display (4) for use as a touch screen or a surface of flexible material (4) (eg PVC, acrylic, up to paper, textiles oa) for use as a touchpad so that each pressure sensor touches the display or the surface. Since modern displays are usually very thin, they have a certain elasticity. When used as a touchpad (without display), one can determine the elasticity of the surface by choosing the material itself.
  • Fig. A shows the perspective layer structure of a display with a sensor layer and a display layer
  • Figs. B-B (I) - (2) show the layer structure from the side in different degrees of detail
  • Fig. C shows the schematic structure of one of the many sensors from above
  • Fig. D-D shows the sensor of C in the side view
  • Fig. E-E shows a side view, an embodiment, of a sensor which changes its resistance as a result of pressure
  • Fig. F shows a plan view of a pressure-sensitive ink on which at the points where pressure sensors are to arise, already interconnected interconnects.
  • Fig. G shows a multilayer sensor, with a lattice-shaped grid, wherein at the nodes of the grid a view is applied, which changes the resistance as a function of pressure, so that cause the upper and the lower conductor track a short circuit;
  • Fig. H shows a side view of Fig. G.
  • Fig. A shows a perspective layer structure of
  • the pressure sensors for such an array can be produced by printing a material which under pressure changes its resistance (9) in a printing process to a substrate (7) with corresponding conductor tracks (5, 6 and 8).
  • This can be done very efficiently using a standard method in board making, where solder paste is usually applied to the board through a stencil stencil.
  • the invention is not limited to this method.
  • it is now possible to print the pressure-sensitive ink onto the board prepared for this purpose, which already has interlocking printed conductors at the points where pressure sensors are to be formed (FIG. F) in order to measure the resistance of the ink.
  • another layer of plastic can now be applied to increase the thickness of the sensors.
  • the distance between the surface and the display to the sensor field increases somewhat, so that a contact of the display can also be ensured and a deformation of the surface is possible without it touching the base surface 7.
  • This contact can also be avoided by using the sensors in a suitable form (square, hexagonal, etc) are placed so close together that the ink (9) itself forms the surface. Then, in the case of use as a touchpad, an additional surface is not necessary.
  • the production of pressure sensors can be excellent and extremely inexpensive in the
  • Manufacturing process of the evaluating electronics are integrated.
  • the sensor technology can also be produced completely in the printing process by also printing the conductor tracks (11 and 13) with a substance or "ink" which has an invariable and lowest possible electrical resistance in a conventional printing process on a base surface.
  • An array of sensor fields (11) with associated strip conductors is first printed on a base area (10). Now the ink is going
  • the sensor surfaces (13) are applied with the corresponding conductor tracks. Since the ink (12) completely surrounds the sensor surface (11), no short circuit between the upper and lower sensor layer can arise. The resistance can now be measured via the active area (Aw). In this way sensors can be applied to almost every base surface. If the base surface should be electrically conductive, an insulating layer must first be applied. This can also be done by printing or any other suitable method. Possibly. An insulating layer is also to be applied above the sensor system and the conductor tracks in such a way that no electrical contact with the touching object can be established.

Abstract

La présente invention concerne un écran ou un pavé tactile = multitouch = (multi-point), lequel est réalisé grâce au placement d'un grand nombre de capteurs de pression sous une surface souple, ce qui permet de mesurer ainsi à la fois la répartition de la pression et la déformation de la surface. Des maxima de pression locaux apparaissent du fait de la souplesse du matériau de surface, ainsi que de la déformation liée se produisant lors du toucher. Etant donné qu'il peut y avoir plusieurs maxima de pression locaux, il est désormais possible de détecter en même temps plusieurs touchers. A partir de la force de pression et de la répartition de la pression, il est en outre possible de déterminer la force avec laquelle la pression est appliquée, de telle sorte que cette information puisse également être utilisée dans l'interface utilisateur. De tels capteurs peuvent être fabriqués de manière très efficace et économique, grâce au fait qu'une encre, qui modifie sa résistance lorsqu'elle est soumise à une pression, est appliquée sur des pistes conductrices réalisées sous la forme de surfaces de détection. Il est également possible d'appuyer sur les pistes conductrices et les surfaces de détection avec une encre ayant une résistance la plus faible possible.
EP08841152A 2007-10-26 2008-10-27 Ecrans ou pavés tactiles single touch ou multitouch composés d'un système de capteurs de pression et fabrication de tels capteurs Withdrawn EP2208129A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007052008A DE102007052008A1 (de) 2007-10-26 2007-10-26 Single- oder multitouchfähiger Touchscreen oder Touchpad bestehend aus einem Array von Drucksensoren sowie Herstellung solcher Sensoren
PCT/EP2008/064547 WO2009053492A1 (fr) 2007-10-26 2008-10-27 Ecrans ou pavés tactiles « single touch » ou « multitouch » composés d'un système de capteurs de pression et fabrication de tels capteurs

Publications (1)

Publication Number Publication Date
EP2208129A1 true EP2208129A1 (fr) 2010-07-21

Family

ID=40139132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08841152A Withdrawn EP2208129A1 (fr) 2007-10-26 2008-10-27 Ecrans ou pavés tactiles single touch ou multitouch composés d'un système de capteurs de pression et fabrication de tels capteurs

Country Status (7)

Country Link
US (1) US20100315373A1 (fr)
EP (1) EP2208129A1 (fr)
JP (1) JP2011501307A (fr)
KR (1) KR20100105545A (fr)
CN (1) CN101836178A (fr)
DE (1) DE102007052008A1 (fr)
WO (1) WO2009053492A1 (fr)

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CN101836178A (zh) 2010-09-15
JP2011501307A (ja) 2011-01-06

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