EP2678763A1 - Interface capacitive gestuelle a commutation de mode de mesure - Google Patents
Interface capacitive gestuelle a commutation de mode de mesureInfo
- Publication number
- EP2678763A1 EP2678763A1 EP12708879.7A EP12708879A EP2678763A1 EP 2678763 A1 EP2678763 A1 EP 2678763A1 EP 12708879 A EP12708879 A EP 12708879A EP 2678763 A1 EP2678763 A1 EP 2678763A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- capacitive
- electrodes
- potential
- measurement
- measurements
- 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- Withdrawn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; 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
- G06F3/04186—Touch location disambiguation
-
- 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
Definitions
- the present invention relates to a control interface device responsive to movement and / or in contact with at least one control object, such as a gesture interface.
- the field of the invention is more particularly but in a nonlimiting manner that of capacitive touch and capacitive proximity surfaces used in particular for HMI commands.
- the touch surface is equipped with conductive electrodes connected to electronic means which make it possible to measure the variation of the capacitances appearing between electrodes and the object to be detected in order to carry out a command.
- This object, or control object can be for example a finger or a stylus.
- Capacitive techniques currently implemented in touch interfaces most often use two layers of conductive electrodes in the form of rows and columns. Electronics measure the coupling capabilities that exist between these lines and columns. When a finger is very close to the active surface, the coupling capabilities near the finger are modified and the electronics can thus locate the position in 2D (XY), in the plane of the active surface.
- Electrodes in line and column structure with direct capacitance measurement techniques.
- the electrodes in rows and columns are then used as independent electrodes and allow a measurement without contact or gesture at great distance (detection of a finger to several centimeters).
- another problem occurs when you want to detect more than one object. Indeed, the measurement requires the scanning of each line and each column, resulting in the appearance in the measure of virtual objects called ghosts. These ghosts prevent the absolute location of several objects on the sensitive surface.
- the device Due to the detection technology used, the device is however limited to contact measurements.
- the presence of crossed electrodes greatly disrupts the measurements in the direct capacitance measurement mode, since the coupling capacities between tracks remain present and become parasitic capacitances which are compensated electronically, with all the risks of drift and electronic noise. that entails.
- US2011 / 0007021 is also known from Bernstein et al. which discloses a capacitive interface capable of detecting a finger in proximity or on a sensitive surface.
- the device comprises an array of row and column electrodes that can operate in a direct capacity measurement mode and a coupling capacity measurement mode.
- the scope of the device is improved by the use of a guard electrode subjected to an alternating potential.
- the aim of the present invention is to propose a solution that makes it possible to manage capacitive electrodes in direct capacitance measurement and coupling capacity measurement modes with the same electronic circuit, while guaranteeing optimal performances in terms of sensitivity of the capacitors. detection and accuracy for remote measurements, as well as resolution.
- control interface device comprising:
- capacitive electronic capacitance means capable of producing distance and / or contact information between at least one control object and capacitive electrodes
- switching means capable of configuring said capacitive measurement electronic means so as to allow either direct capacitance measurements between capacitive electrodes and one or more control objects, and measurements of variation of coupling capacitors between capacitive electrodes for excitation and measurement,
- said capacitive electronic capacitance means are at least partially referenced to a floating reference electrical potential with respect to a ground potential in direct capacitance measurements.
- the floating potential is an alternating potential. It is said to be floating with respect to a ground potential since it is not referenced (electrically) at this ground potential, or to the extent that it is variable (definite or indefinite) with respect to ground potential. to this mass potential.
- the ground potential may be the ground of the device, or a ground, or any potential referenced electrically to a mass of the device, but possibly different from it.
- control objects may be for example a finger or a stylus. An action performed by a user with two or more fingers is thus "seen" by the device as the action of several control objects.
- These control objects can, without loss of generality, be considered as referenced to the device ground or to the ground.
- the capacitive measuring means can be referenced to a reference electrical potential fixed with respect to the ground potential during measurements of coupling capacitors.
- This reference electric potential can also be equal to the ground potential or referenced to a ground potential.
- the coupling capacity measurement mode operates according to a more conventional scheme but sufficient to detect contacts between control objects and the detection surface for example.
- the capacitive measuring means can at least partly be referenced to a floating reference electric potential with respect to the ground potential when measuring coupling capacitors.
- the capacitive measuring means comprise a part referenced to a reference electrical potential floating in the two modes. measurement (direct capacity measurements and coupling capacity measurements).
- the device according to the invention may furthermore comprise switching means arranged in such a way as to connect at least one excitation capacitive electrode to a fixed electrical potential with respect to the ground potential during coupling capacitance measurements.
- the device according to the invention may further comprise switching means arranged so as to allow a change of reference electrical potential, between a floating potential and a fixed potential with respect to the ground potential.
- the invention makes it possible to implement floating detection electronics which are particularly effective for long-range measurements, and to advantageously combine it with coupling capacity detection modes which allow unambiguous detection of several short-range control objects. .
- the invention thus extends the field of application of this measurement technique by floating detection, one of the objectives as described in the prior art is precisely to eliminate the coupling capacitors between neighboring electrodes or between the electrodes and the electrodes. 'environment.
- the invention describes a mode of implementation of a floating detection for measurements of original coupling capabilities in view of the prior art.
- the device according to the invention may further comprise a guard electrode at an electrical reference potential disposed near the capacitive electrodes, according to their face opposite to the detection surface.
- this guard electrode may be at the floating potential or at the fixed potential with respect to the ground potential. It makes it possible to overcome to a large extent disturbances to the environment, in particular those due to the device comprising the interface.
- the device according to the invention may further comprise scanning means for:
- selecting at least one excitation capacitive electrode and at least one measuring capacitive electrode so as to enable measurements of coupling capacitance variation between said capacitive excitation electrodes and measured
- the unselected electrodes contribute to the guard, which allows in particular in the direct measurement mode of capacity to cancel parasitic capacitances and to optimize the sensitivity.
- the device according to the invention may further comprise:
- capacitive electrodes arranged in two superposed layers which layers comprise, respectively, electrodes in a first direction and electrodes in a second direction; capacitive electrodes arranged in a layer, said electrodes comprising elements connected by bridge connections in a first direction and a second direction, respectively;
- capacitive electrodes arranged along rows and columns; capacitive electrodes comprising a plurality of surfaces electrically connected to one another, which surfaces may be substantially of one of the following shapes: square, rectangular, diamond-shaped, circular, elliptical;
- substantially transparent electrodes based on ITO Indium Tin Oxide
- the device according to the invention can comprise:
- a capacitive excitation electrode arranged in such a way as to substantially surround the capacitive measuring electrodes.
- the capacitive excitation electrode may be disposed on the same surface or on a surface substantially parallel to that of the measuring capacitive electrodes.
- the sensitive surface is thus substantially covered with multiplexed independent measuring electrodes, which can be used in the two direct capacitance measurement and coupling capacity measurement modes.
- the excitation electrode (s) are not used and are put to the potential of the guard to which they contribute.
- Coupling capacitance measurements are made between the excitation electrode (s) and measuring electrodes, for example by measuring electrode measurement.
- a control interface control method implementing a device according to one of the preceding claims, comprising steps of:
- FIG. 1 shows a diagram of the device configured according to a direct capacity measurement mode, with a floating reference electric potential
- FIG. 2 shows a diagram of the device configured according to a coupling capacity measurement mode, with a floating reference electric potential
- FIG. 3 shows a diagram of the device configured according to a coupling capacity measurement mode, with a reference electrical potential fixed with respect to the ground potential.
- FIG. 4 shows alternative embodiments of the capacitive electrodes, with capacitive measurement electrodes that are independent over the entire surface and, FIG. 4 (a) and FIG. 4 (b), an excitation electrode and FIG. 4 (c). ) columns of excitation electrodes.
- FIGS. 1, 2 and 3 An exemplary embodiment of a device according to the invention, which of course is not limiting, will be described with reference to FIGS. 1, 2 and 3.
- the device comprises a detection surface 1.
- Two crossed electrode layers 3, 4 are placed on superimposed surfaces, rows and in columns, therefore in two substantially perpendicular d irections.
- a guard electrode 2 is placed behind the electrodes 3, 4, that is to say on their side opposite to the detection surface 1. This guard electrode 2 makes it possible to avoid capacitive leaks during capacitance measurements and greatly reduce parasitic coupling capacitances in coupling capacity measurement mode.
- the device according to the invention can operate according to a capacity measurement mode, in which capacitances (or at least information relating to capacitances, which may also be for example capacity reversals) are measured 1 / C) between one or more control objects and electrodes 3, 4, for the purpose of deriving the distance or approach information.
- the detection electronics is configured in floating mode. This mode is shiny in Figure 1.
- the device can also operate according to coupling capacitance measurement modes, in which a variation of coupling capacitance between excitation electrodes 3 and measuring electrodes 4 is measured (or at least information relating to a capacitance). which may also be, for example, an inverse of capacitance 1 / C) sufficiently close to at least one area of the detection surface 1 to interact capacitively.
- a variation of coupling capacitance between excitation electrodes 3 and measuring electrodes 4 is measured (or at least information relating to a capacitance).
- a variation of coupling capacitance between excitation electrodes 3 and measuring electrodes 4 is measured (or at least information relating to a capacitance).
- a variation of coupling capacitance between excitation electrodes 3 and measuring electrodes 4 is measured (or at least information relating to a capacitance).
- an object of control is detected by the disturbances of the capacitive coupling that it generates when it approaches the zone where the electrodes 3, 4 interact.
- the device according to the invention can operate according to two modes of coupling capacity measurement:
- the detection electronics is a floating electronics, referenced to a floating potential
- the detection electronics is an electronic referenced to a fixed potential with respect to the mass of the ispositif device.
- the device comprises the same components in all modes.
- a set of analog switches SI ... S13 allows you to switch from a configuration allowing measurements of capacity to Coupling capacity measurement configurations. These switches S1 ... S13 are chosen so as to minimize all the parasitic capacitances that they are capable of generating.
- the invention allows a high speed of detection of one or more control objects (or others). It is known that contactless control applications must be simple so that anyone can easily master gesture commands. Indeed, because it does not touch the control surface or detection 1, it is more difficult to control the movement of one or more fingers.
- the most common non-contact commands are approach detection to activate a device, move an image on a screen, magnify or reduce an image .... These commands can be performed with one or two fingers. These commands can be detected with the invention by taking measurements along lines 3 and columns 4 of sensors in the direct capacity measurement mode. This technique is fast because it is sufficient to select sequentially at most all n rows and m columns, which represents n + m measures.
- Coupling capability measurement modes normally require sequential selection of all coupling capabilities, i.e., all row-column nodes, which represents n x m combinations. It is possible to significantly reduce the number of combinations by exploiting the areas where the fingers and ghosts were previously identified in the direct capacity measurement mode.
- the position detection of several fingers can be performed with a number of measurements between n + m and n x m.
- the invention is more particularly suited to medium and large size touch screens where the approach detection function of one or more fingers, or one or more hands, becomes possible using a number of electrodes 3, 4 limited, while maintaining the touch and multi-touch function that exists on the market.
- the capacitive electrodes 3, 4 and the guard electrode 2 may be made of transparent conductive material as deposited on a polymer such as PET or on glass so that they can be used on screens.
- the rows and columns of electrodes 3, 4 comprise a succession of surfaces in the form of a square or rhombus.
- the distance separating these emitting and receiving surfaces can be advantageously optimized in order to optimize the range of the distance measurement with respect to the detection surface 1.
- the measurement has a fairly low sensitivity and the scope of the detection of the control object is limited to a few millimeters in the air.
- the guard 2 and a slight air gap between the emitter 3 and receiver 4 electrodes it is possible to increase the sensitivity when approaching the object.
- This technique makes it possible to project the field lines emitted by the emitting electrodes 4 a little further and to react earlier when approaching an object. It is thus possible to detect a finger in coupling capacity measuring mode more than 5 mm apart.
- the rows and the columns of electrodes 3, 4 can be completed towards the edges of the detection surface 1 by a last electrode substantially in the shape of a triangle to improve the detection capabilities of the device towards the edges.
- the measured capacitance increases as the object to be detected approaches.
- the capacities to be measured in this case are generally between some femtofarads and some picofarads.
- the measured capacitance also increases as the object to be detected approaches, since this object and the excitation electrodes 3 are substantially at ground potential. Mr.
- the object to be detected acts as a ground-disturbing element that derives a portion of the field lines between the excitation electrode. 3 and the measuring electrode 4 and therefore decreases the coupling capacity when approaching.
- the capacitances to be measured in coupling capacity measurement modes are generally between a few picofarads and a few tenths of picofarads.
- the electronics 8 is designed to be able to measure both the capacitances in direct capacitance measurement mode and the coupling capacitance measurement mode.
- the choice of coupling capacity measurement mode depends on the application.
- the floating mode of FIG. 2 allows a better sensitivity to detect control objects, whereas in some cases, according to the electrode geometries, the non-floating mode of FIG. 3 allows a better lateral resolution.
- the device shown in FIGS. 1, 2 and 3 comprises, in a nonlimiting manner, four electrode lines 3 which can be used as single electrodes in direct capacitance measurement mode and as emitting or excitation electrodes in the measurement mode of the electrodes. coupling capacitors, and four electrode columns 4 which can be used as single electrodes in direct capacitance measurement mode and in receiver or measurement electrodes in the coupling capacitance measurement mode.
- the electronics used are a so-called floating-feed electronics for the direct capacitance measurement mode, shown in FIG. 1, as well as for the coupling capacitance measurement mode shown in FIG. Switching switches S1 ... S13, this electronics is transformed into non-floating electronics in order to operate in the coupling capacity measurement mode shown in Figure 3.
- the electronics In floating mode, the electronics energize the electrodes 3, 4 concerned and keep them 9 preferably at a fixed frequency, with respect to the mass M.
- the mass M has a potential close to that of the earth and the earth. object to be detected (external environment).
- the electrodes are protected by a guard electrode 2 connected to the potential of the guard 9.
- the rows and columns of measuring electrodes 3, 4 and the guard electrode 2 are connected to the electronic circuit 8 by means of conductive tracks 7, for example made of copper or silver.
- the connection tracks between the electrodes 3, 4 and the electronics 8 are shielded with the shielding B1 is connected to the potential of the guard 9.
- This connection can be realized with a cable, or preferably with a multilayered substrate, such as for example a polyimide-based (Kapton) or PET-based bulk circuit.
- the tracks connected to the electrodes 4 which have only the receiver function are slightly elongated from the tracks connected to the electrodes 3 having the two transmitting and receiving functions in order to limit the capacitive leaks in the coupling capacitance measurement mode.
- the use of flexible floss promotes this protection thanks to the small air gap between tracks 7 and the guard plan.
- the measurement electrodes 3, 4 are all receivers.
- the switches S1 through S8 selectively select the measurement receiving electrode (or the active electrode) 3, 4.
- the non-selected receiving electrodes for each sequential measurement are connected to the guard 9 to prevent capacitive leakage.
- the switches S9 and S10 are connected to the floating reference or guard potential 9 in order to avoid capacitive leakage with the excitation potential generated by the oscillator OSC.
- the oscillator OSC preferably provides a fixed frequency electrical voltage.
- Switches SU and S12 connect the electrodes of the lines 3 to the charge amplifier A, which makes it possible to measure the capacitance between the active electrode and the object or objects.
- the switch 13 relays the output of the oscillator OSC to the external mass M and thus provides the excitation of this mass M in order to set the excitation voltage of the electrodes 3, 4 and floating capacitive bridge.
- the entire floating electron is powered by an AF floating power supply.
- This floating bridge electronics makes it possible to eliminate parasitic capacitances to a large extent.
- the measured capacities are directly those created between the target object and the electrodes 3, 4.
- the sensitivity of the device is optimized and allows a very long-range measurement very resolute.
- the capacitive sensors and the associated electronics can then be optimized to reach a measurement range, or dynamic, important.
- the range of capacitances to be measured with each electrode can range from less than one thousandth of picofarad to several picofarads, ie a dynamic in terms of capacity greater than 1000.
- This dynamic makes it possible to detect, with substantially the same resolution side related to the size of the electrode, the presence or position of a distant object such as a finger more than 5 cm away and the contact of this finger on the detection surface.
- the detection electronics is configured in the same manner as in FIG. 1, with a floating reference potential 9.
- the electrodes of the lines 3 are emitting excitation electrodes, while the electrodes of the columns 4 are measuring measurement electrodes.
- the function of the switches S9 and S10 is to connect the emitter electrode lines 3 to the ground M (which is also substantially the potential of a control object).
- the active transmitter line 3 is selected by the switches S5 to
- Unused transmission lines 3 are set to reference potential 9 floating to limit parasitic capacitances.
- the switches SU and S12 are also connected to the floating reference potential 9 in order to avoid capacitive leakage between the excitation signal and the receiving electrodes 4.
- the switches S1 to S4 make it possible to select a receiving electrode 4 from the electrodes of the columns 4 and to connect it to the charge amplifier A, in order to measure the coupling capacity (possibly affected by the presence of the control object) between the emitting electrode 3 and the receiving electrode 4 selected.
- the reference potential 9 always remains at the same value as the potential of the receiver electrodes 4, which guarantees a good protection against parasitic capacitances.
- the electronics are referenced to the ground M.
- the electrodes of the lines 3 are emitting, while the electrodes of the columns 4 are receivers.
- Switches S9 and S10 function to connect the lines of electrodes 3 emitting, the excitation signal OSC.
- the active transmitter line 3 is selected by the switches S5 to S8.
- the switches SU and S12 are connected to the reference or guard potential 9 in order to avoid capacitive leakage between the excitation signal and the 4 receiver columns.
- the switch 13 ensures the excitation of the emitting electrodes 3.
- the external mass M is this time connected to the reference potential 9.
- the switches S1 to S4 make it possible to select a receiving electrode 4 from the electrodes of the columns 4 and to connect it to the charge amplifier A, in order to measure the coupling capacity (possibly affected by the presence of the control object) between the emitting electrode 3 and the receiving electrode 4 selected.
- the reference potential 9 always remains at the same value as the potential of the receiver electrodes 4, which guarantees a good protection against parasitic capacitances.
- the AF floating power supply plays only a role of conventional power supply where electrical insulation at the excitation frequency is no longer necessary.
- the output signal of the charge amplifier A is the image of the capacitance seen by the selected receiver electrode 3, 4. This signal is processed by the processing module Mod to determine the position and movement of the detected objects.
- This information is sent in digital form to the external circuit which manages and processes the functions of the interface.
- the device according to the invention can be implemented with a wide variety of electrode configurations.
- the device according to the invention may comprise:
- independent capacitive measuring electrodes 4 distributed over the entire detection surface 1 and connected to the charge amplifier A by scanners such as S1 to S4, but in a number equal to the number of electrodes;
- one or a small number of capacitive electrodes (3) of excitation 3 are positioned so as to substantially surround the capacitive electrodes of measurement.
- the capacitive excitation electrodes 3 are arranged in columns between the independent measurement electrodes 4.
- the excitation electrodes 3 and measurement 4 can be separated by guard tracks. In order to be able to pass these tracks on the same surface, the mail constituting them the excitation electrode 3 are not closed on Fig ures 4 (a) and 4 (b).
- the capacitive electrode (s) of excitation 3 may be made on the same surface as the measurement electrodes 4, or on another layer or a substantially parallel surface. They can in particular be made on a surface comprising the guard electrode 2.
- the sensitive surface is thus substantially covered with multiplexed independent measuring electrodes 4, which can be used in the two direct capacitance measurement and coupling capacity measurement modes.
- the excitation electrode (s) 3 are not used and are put to the potential of the guard 9 to which they contribute.
- Coupling capacitance measurements are made between the excitation electrode (s) 3 and measurement electrodes 4, for example by measuring electrode measurement 4.
- all the excitation electrodes 3 can be interconnected to make only one of them, or S5 ... S8 scanners can be used to excite the electrodes. of excitement 3 located both measuring electrodes 4 being scanned, and setting the other excitation electrodes to the potential of the guard 9. According to other variants of embodiments:
- the electrodes 3, 4 may be placed in rows and columns or directions forming any angle between them;
- the electrodes 3, 4 may comprise a succession of surfaces of all shapes
- Electrodes 3, 4 can be deposited on the same layer with electrical bridges 5, 6 to connect the surfaces without shorting the rows and columns.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1151386A FR2971867B1 (fr) | 2011-02-21 | 2011-02-21 | Interface capacitive gestuelle a commutation de mode de mesure. |
PCT/FR2012/050182 WO2012114008A1 (fr) | 2011-02-21 | 2012-01-30 | Interface capacitive gestuelle a commutation de mode de mesure |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2678763A1 true EP2678763A1 (fr) | 2014-01-01 |
Family
ID=45833439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12708879.7A Withdrawn EP2678763A1 (fr) | 2011-02-21 | 2012-01-30 | Interface capacitive gestuelle a commutation de mode de mesure |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2678763A1 (fr) |
FR (1) | FR2971867B1 (fr) |
WO (1) | WO2012114008A1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3005763B1 (fr) * | 2013-05-17 | 2016-10-14 | Fogale Nanotech | Dispositif et procede d'interface de commande capacitive adapte a la mise en œuvre d'electrodes de mesures fortement resistives |
FR3013472B1 (fr) * | 2013-11-19 | 2016-07-08 | Fogale Nanotech | Dispositif accessoire couvrant pour un appareil portable electronique et/ou informatique, et appareil equipe d'un tel dispositif accessoire |
FR3028061B1 (fr) | 2014-10-29 | 2016-12-30 | Fogale Nanotech | Dispositif capteur capacitif comprenant des electrodes ajourees |
FR3032287B1 (fr) | 2015-02-04 | 2018-03-09 | Quickstep Technologies Llc | Dispositif de detection capacitif multicouches, et appareil comprenant le dispositif |
FR3051896B1 (fr) * | 2016-05-25 | 2018-05-25 | Fogale Nanotech | Dispositif de detection capacitive a garde nulle |
CN107503416B (zh) * | 2017-09-26 | 2023-02-28 | 珠海普林芯驰科技有限公司 | 马桶器的检测电路及其检测方法 |
FR3081223B1 (fr) * | 2018-05-15 | 2020-09-18 | Fogale Nanotech | Dispositif de detection capacitive redondante parallele |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2756048B1 (fr) * | 1996-11-15 | 1999-02-12 | Nanotec Ingenierie | Pont de mesure capacitif flottant et systeme de mesure multi-capacitif associe |
FR2844349B1 (fr) * | 2002-09-06 | 2005-06-24 | Nanotec Solution | Detecteur de proximite par capteur capacitif |
TWI528250B (zh) * | 2009-06-25 | 2016-04-01 | Elan Microelectronics Corp | Object Detector and Method for Capacitive Touchpad |
US9323398B2 (en) * | 2009-07-10 | 2016-04-26 | Apple Inc. | Touch and hover sensing |
FR2949007B1 (fr) * | 2009-08-07 | 2012-06-08 | Nanotec Solution | Dispositif et procede d'interface de commande sensible a un mouvement d'un corps ou d'un objet et equipement de commande integrant ce dispositif. |
-
2011
- 2011-02-21 FR FR1151386A patent/FR2971867B1/fr not_active Expired - Fee Related
-
2012
- 2012-01-30 EP EP12708879.7A patent/EP2678763A1/fr not_active Withdrawn
- 2012-01-30 WO PCT/FR2012/050182 patent/WO2012114008A1/fr active Application Filing
Non-Patent Citations (2)
Title |
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None * |
See also references of WO2012114008A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2012114008A1 (fr) | 2012-08-30 |
FR2971867A1 (fr) | 2012-08-24 |
FR2971867B1 (fr) | 2013-02-22 |
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