EP2671143A1 - Capteur tactile multicontacts a couche intermediaire resistive - Google Patents
Capteur tactile multicontacts a couche intermediaire resistiveInfo
- Publication number
- EP2671143A1 EP2671143A1 EP12705369.2A EP12705369A EP2671143A1 EP 2671143 A1 EP2671143 A1 EP 2671143A1 EP 12705369 A EP12705369 A EP 12705369A EP 2671143 A1 EP2671143 A1 EP 2671143A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- intermediate layer
- conductive tracks
- touch sensor
- contact
- columns
- 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- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
- G06F3/047—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using sets of wires, e.g. crossed wires
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/048—Indexing scheme relating to G06F3/048
- G06F2203/04808—Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
Definitions
- the present invention relates to a multi-contact touch sensor.
- It also relates to a touch screen implementing a multi-contact touch sensor.
- This sensor comprises an upper structure comprising conductive tracks arranged in lines and a lower structure comprising conductive tracks arranged in columns. Spacer spacers are positioned between the upper structure and the lower structure to isolate the conductive tracks.
- a contact resistance is thus created in each cell corresponding to the intersections of the lines and the conductive columns.
- the document EP 1 719 047 describes in particular a method of sequential scanning of the lines and of the conductive columns, making it possible to detect the position of the contact points corresponding to the bearing zones by a user on the sensor.
- Document FR 2 942 329 also discloses such a sensor further comprising a resistive intermediate layer positioned between the spacers on the one hand and a layer of the conductive top layer and the conductive lower layer on the other hand.
- this resistive material between the two conductive layers makes it possible to increase the contact resistance at each point of contact. It is possible to limit the recirculation of the current between rows and columns to eliminate masking and orthogonality problems between touch points.
- the document FR 2 942 329 describes a resistive intermediate layer of silicone, the thickness of which is about 300 ⁇ m and having a resistivity of 640 ⁇ . ⁇
- This intermediate silicone layer plays its role perfectly to reduce the problems of masking and orthogonality between the contact points.
- the present invention aims to provide a multi-contact touch sensor having an improved structure, easier to implement.
- the present invention relates to a multi-contact tactile sensor comprising an upper structure comprising conductive tracks arranged in lines, a lower structure comprising conductive tracks arranged in columns, spacing spacers positioned between said upper structure and said structure. lower and at least one intermediate layer positioned on the conductive tracks of at least one of the upper structure and the lower structure.
- the intermediate layer is a semiconductor metal oxide layer.
- this intermediate layer of metal oxide By using the semiconducting properties of this intermediate layer of metal oxide, it is possible to improve the electrical characteristics of the touch sensor, and in particular to limit the recirculation of the current between the rows and the columns.
- the intermediate layer has a thickness of between 50 and 300 nm.
- the use of a semiconductor metal oxide layer allows the implementation of a thin intermediate layer between the upper and lower structures of the multi-contact touch sensor.
- this thin layer of semiconductor metal oxide makes it possible to obtain a sensor tactile having better optical characteristics. It is thus possible to gain in terms of transparency up to 2 to 3% compared with a multi-contact tactile sensor of the prior art.
- the intermediate layer comprises semiconductor nanoparticles, for example titanium dioxide (TiO2) or zinc oxide (ZnO).
- semiconductor nanoparticles for example titanium dioxide (TiO2) or zinc oxide (ZnO).
- the intermediate layer is made of a resistivity material between 10 3 and 10 6 ⁇ . ⁇ .
- the intermediate layer is structured in lines on the conductive tracks of the upper structure or is structured in columns on the conductive tracks of the lower structure.
- This structuring of the intermediate layer makes it possible to avoid the problems of electrical leakage between adjacent columns or lines, the latter being isolated from each other.
- the present invention relates to a touch screen comprising a display screen disposed under a multi-contact touch sensor according to the invention.
- This touch screen has similar features and advantages to those described above with reference to the multi-contact touch sensor.
- FIG. 1 is a sectional view of a multi-contact tactile sensor according to a first embodiment of the invention
- FIG. 2 is a sectional view of a multi-contact tactile sensor according to a second embodiment of the invention
- FIG. 3 is an exploded perspective view of the multi-contact tactile sensor of FIG. 1;
- FIG. 4 is a sectional view of a multi-contact tactile sensor according to a third embodiment of the invention.
- FIG. 5 is a sectional view of a multi-contact tactile sensor according to a fourth embodiment of the invention.
- FIG. 6 is an exploded perspective view of the multi-contact touch sensor of FIG. 4.
- the multi-contact tactile sensor 10 illustrated in Figure 1 comprises an upper structure 11 and a lower structure 12 arranged vis-à-vis.
- the upper structure 1 is for example made from a film 13 of polyethylene terephthalate (PET) under which conductive tracks 14 are arranged.
- PET polyethylene terephthalate
- These conductive tracks are made of a conductive material and structured along lines in the plane of the upper structure 11 as illustrated in FIG.
- the lower structure 12 is for example formed from a glass plate 15 on which there are conductive tracks 16. These conductive tracks 16 are arranged in columns in the plane of the lower structure 12.
- the conductive material used to make the conductive tracks 14, 16 is for example a transparent conductive oxide, such as indium tin oxide (ITO).
- ITO indium tin oxide
- other translucent conductive materials such as an aluminum doped zinc oxide (ZnO: Al) or a fluorine doped tin oxide (SnO2: F).
- the multi-contact touch sensor 10 is transparent.
- the conductive track layers 14, 16 made of ITO, the PET film 3 and the glass plate 15 are transparent.
- This embodiment is particularly advantageous when the touch sensor 10 is intended to be associated with a display screen disposed under the multi-contact touch sensor so as to form a touch screen.
- Spacer spacers 17 are furthermore arranged between the upper structure 11 and the lower structure 12. These spacers 17 are arranged in such a way that, when no pressure is exerted on the upper structure 11, the tracks Conductors 14 arranged in lines do not come into contact with the conductive tracks 16 arranged in columns.
- the multi-contact touch sensor 10 In order to increase the contact resistance between the lines 14 and the columns 16, it is provided in the multi-contact touch sensor 10 to position an intermediate layer 21 on the conductive tracks of at least one of the upper structures 11 or lower 12.
- the intermediate layer 21 is positioned on the conductive tracks 14 of the upper structure 11.
- FIG. 2 A second embodiment is illustrated in FIG. 2.
- the second embodiment is in all respects identical to that described. previously in connection with Figure 1, only the positioning of the intermediate layer 22 being modified.
- This intermediate layer 22 is here placed on the conductive tracks 16 of the lower structure 12.
- the intermediate layer 21 is structured in lines on the conductive tracks arranged in lines 14 of the upper structure 11.
- the intermediate layer 22 is structured in columns on the conductive tracks arranged in columns 16 of the lower structure 12.
- the intermediate layer 21, 22 is made from a semiconductor metal oxide layer.
- this intermediate layer 21, 22 comprises semiconductor nanoparticles.
- the intermediate layer 21, 22 comprises nanoparticles of titanium dioxide ⁇ 02.
- the semiconductor properties of these titanium dioxide particles ⁇ 2 are thus used in order to increase the contact resistance between the lines and the columns 16 of the multi-contact tactile sensor 10.
- This intermediate layer 21, 22 furthermore makes it possible, in the embodiments described above, to preserve the transparency of the touch sensor 10.
- It also preferably has a resistivity of between 10 3 and 10 6 ⁇ m.
- the contact resistance is very low, of the order of a few Ohms.
- the resistance at the level of points of contact is much higher, on the order of a few thousand ohms.
- This intermediate layer 21, 22 is a thin layer, having a small thickness, for example between 50 and 300 nm, and typically substantially equal to 100 nm.
- the intermediate layer 21, 22 comprises zinc oxide nanoparticles ZnO.
- This intermediate layer thus has substantially similar properties to those described for the intermediate layer made from nanoparticles of titanium dioxide ⁇ 2.
- the resistivity of the intermediate layer 21, 22 made of zinc oxide ZnO is substantially equal to 10 5 ⁇ m
- the spacers 17 positioned between the upper structure 11 and the lower structure 12 are arranged such that, when no pressure is exerted on the upper structure 11 of the multi-contact tactile sensor 10, the conductive tracks arranged in lines 14 coated with the intermediate layer 21 do not come into contact with the conductive tracks arranged in columns 16, and the conductive tracks arranged in columns 16 coated with the intermediate layer 22 do not come into contact with the conductive tracks arranged in lines 14.
- the intermediate layer 21, 22 is structured in rows or columns, it is preferably structured at the same time as the ITO conductive tracks made respectively on the glass plate 15 and the PET film 13.
- the structuring of this intermediate layer 21, 22 makes it possible to avoid electrical leakage problems between the columns or the consecutive lines because they are thus isolated from each other.
- the touch sensor could simultaneously comprise an intermediate layer 21 arranged on the lines 14 of the upper structure 11 and an intermediate layer 22 arranged on the columns 16 of the lower structure 12.
- FIGS. 4 to 6 show a third and fourth embodiment of the invention in which the intermediate layer 23, 24 is deposited on the conductive tracks 14 of the upper structure 11 (FIGS. 4 and 6) or on the conductive tracks 16 of the lower structure 11 ( Figure 5) but without structuring in the form of rows or columns.
- an intermediate layer 23 is positioned on the conductive tracks arranged in lines 14 of the upper structure 11.
- the conductive tracks 14 are thus embedded in the thickness of the intermediate layer 23.
- the intermediate layer 24 is positioned on the conductive tracks arranged in columns 16 of the lower structure 12.
- the conductive tracks arranged in columns 16 are thus embedded in the intermediate layer 24.
- the touch sensor could simultaneously comprise an intermediate layer 23 arranged on the upper structure 11 and an intermediate layer 24 arranged on the lower structure 12.
- Various manufacturing techniques can be used to make the multi-contact touch sensor 10 as described above with reference to FIGS. 1 to 6.
- the traditional techniques of screen-printing or etching can be used to make the conductive tracks 14, 16 in ITO on the glass plate 15 and the PET film 13.
- the intermediate layer 21-24 can be made from a solution of nanoparticles deposited by a sol-gel process, by polymerization of the solution.
- the thickness of the intermediate layer 21-24 thus produced can be controlled by the concentration of the solution used. Thus, by increasing the concentration of the nanoparticles, the thickness of the intermediate layer 21-24 increases.
- nanoparticles are dispersed in the aqueous solution with 0.2% of SDS (Sodium Dodecyl Sulfate).
- Such an aqueous solution of nanoparticles makes it possible to produce an intermediate layer having a thickness substantially equal to 130 nm when using, for example, a technique of application by impression with a doctor blade (also called Doctor Blade in English terminology).
- the intermediate layer 21-24 may be deposited indifferently on the lower structure 12 formed from a glass plate 15 and / or on the upper structure 11 made from a PET film 13.
- the intermediate layer 22, 24 is, however, deposited on the conductive tracks 16 of the lower structure 12 made on the glass plate 15.
- Deposition techniques of the nanoparticle solution can implement spraying coating techniques. coating), spin-coating or cast-coating.
- a thin d'02-type semiconductor metal oxide layer may also be deposited by chemical vapor deposition (CVD), physical vapor deposition (PVD or physical vapor deposition) or by electroplating.
- CVD chemical vapor deposition
- PVD physical vapor deposition
- electroplating by electroplating.
- the PVD physical vapor deposition technique is particularly well suited for producing a semi-conductive sub-micrometer thin film from zinc oxide ZnO nanoparticles.
- a transparent layer can thus be obtained, with a thickness of the order of 100 nanometers.
- the intermediate layer 21, 22 is deposited on an ITO conductive layer, the structuring in lines 14 or in columns 16 then being carried out simultaneously on the ITO conductive layer and the intermediate layer.
- semiconductor metal oxide for example by etching.
- the ITO conductive layers are first structured in rows and columns before the deposition of the intermediate layer 23, 24.
- spacers 17 are arranged, for example by screen printing either on the lower structure 12 or on the upper structure 11.
- these spacers are arranged between the rows 14 or the columns 16.
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)
- Force Measurement Appropriate To Specific Purposes (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1150741A FR2971068B1 (fr) | 2011-01-31 | 2011-01-31 | Capteur tactile multicontacts a couche intermédiaire résistive |
| PCT/FR2012/050154 WO2012104522A1 (fr) | 2011-01-31 | 2012-01-24 | Capteur tactile multicontacts a couche intermediaire resistive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2671143A1 true EP2671143A1 (fr) | 2013-12-11 |
Family
ID=44501812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12705369.2A Withdrawn EP2671143A1 (fr) | 2011-01-31 | 2012-01-24 | Capteur tactile multicontacts a couche intermediaire resistive |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20120194450A1 (fr) |
| EP (1) | EP2671143A1 (fr) |
| FR (1) | FR2971068B1 (fr) |
| WO (1) | WO2012104522A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2508626B (en) * | 2012-12-05 | 2014-10-29 | R & D Core Ltd | Contact sensor |
| US20150084909A1 (en) * | 2013-09-20 | 2015-03-26 | Synaptics Incorporated | Device and method for resistive force sensing and proximity sensing |
| US10037098B2 (en) | 2015-07-29 | 2018-07-31 | The Board Of Trustees Of The Leland Stanford Junior University | Methods and apparatus concerning sensitive force sensors |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3642780A1 (de) * | 1986-05-05 | 1987-11-12 | Siemens Ag | Detektormatte und verfahren zu ihrer herstellung |
| US5220136A (en) * | 1991-11-26 | 1993-06-15 | Elographics, Inc. | Contact touchscreen with an improved insulated spacer arrangement |
| JP3718095B2 (ja) * | 2000-01-31 | 2005-11-16 | パイオニア株式会社 | プラズマディスプレイパネル及びその製造方法 |
| JP2003109434A (ja) * | 2001-06-27 | 2003-04-11 | Bridgestone Corp | 透明導電フィルム及びタッチパネル |
| FR2866726B1 (fr) | 2004-02-23 | 2006-05-26 | Jazzmutant | Controleur par manipulation d'objets virtuels sur un ecran tactile multi-contact |
| US7582403B2 (en) * | 2006-07-17 | 2009-09-01 | E. I. Du Pont De Nemours And Company | Metal compositions, thermal imaging donors and patterned multilayer compositions derived therefrom |
| FR2914756B1 (fr) * | 2007-04-05 | 2012-09-21 | Jazzmutant | Capteur multi-tactile transparent. |
| US7989229B2 (en) * | 2007-09-10 | 2011-08-02 | International Business Machines Corporation | Tactile surface inspection during device fabrication or assembly |
| FR2925717B1 (fr) * | 2007-12-19 | 2010-06-18 | Stantum | Capteur tactile transparent multicontatcs a base de depot surfacique metallise |
| FR2942329B1 (fr) * | 2009-02-17 | 2011-07-15 | Stantum | Capteur multipoints |
-
2011
- 2011-01-31 FR FR1150741A patent/FR2971068B1/fr not_active Expired - Fee Related
- 2011-09-15 US US13/233,615 patent/US20120194450A1/en not_active Abandoned
-
2012
- 2012-01-24 EP EP12705369.2A patent/EP2671143A1/fr not_active Withdrawn
- 2012-01-24 WO PCT/FR2012/050154 patent/WO2012104522A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2012104522A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012104522A1 (fr) | 2012-08-09 |
| FR2971068B1 (fr) | 2013-09-27 |
| US20120194450A1 (en) | 2012-08-02 |
| FR2971068A1 (fr) | 2012-08-03 |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HIRSCH, LIONEL Inventor name: WANTZ, GUILLAUME Inventor name: GONCALVES, GUILLAUME |
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| DAX | Request for extension of the european patent (deleted) | ||
| 19U | Interruption of proceedings before grant |
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| 19W | Proceedings resumed before grant after interruption of proceedings |
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| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (C.N.R.S.) Owner name: INSTITUT POLYTECHNIQUE DE BORDEAUX (IPB) Owner name: UNIVERSITE DE BORDEAUX I Owner name: STANTUM |
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| 18D | Application deemed to be withdrawn |
Effective date: 20220402 |