• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a capacitive sensing device, comprising a plurality of individual capacitive measuring electrodes (12) distributed along a measuring surface, and connecting tracks (20) respectively connected to said measuring electrodes (12), wherein the measuring electrodes (12) and the connecting tracks (20) are arranged in two distinct visually transparent layers separated by an electrically insulating insulation material (53). The invention also relates to a method of manufacturing the device, and an apparatus comprising the device.
    公开号:FR3032287A1
    申请号:FR1550843
    申请日:2015-02-04
    公开日:2016-08-05
    发明作者:Christophe Bernard；Christophe Blondin
    申请人:Fogale Nanotech SA；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a capacitive detection device intended to be superimposed or integrated into a display screen, and which is arranged in such a way as to minimize the interactions between the capacitor and the capacitor. interference with the measuring electrode connection tracks. It also relates to a method of manufacturing the device, and an apparatus comprising such a device. The field of the invention is more particularly but in a nonlimiting manner that of tactile and contactless human machine interfaces. STATE OF THE PRIOR ART Many devices incorporate control interfaces or human-machine interfaces that are capacitive, superimposed or integrated into a display screen. These interfaces comprise capacitive measurement electrodes distributed over a detection surface, which are sensitive to the presence of a control object such as a finger or a stylus. These electrodes are often made in the form of layers of materials that are both substantially transparent and substantially electrically conductive, such as ITO (indium tin oxide). Control interface configurations are known in which the measurement electrodes are distributed in the form of crossed lines and columns. In this case, the electrodes extend to the edge of the detection surface and can therefore be connected directly to the control electronics. The electrodes in rows and columns can be made by two superposed distinct conductive layers, separated by an insulating layer. The electrodes in rows and columns can also be made in the form of interlocking structures (for example diamond-shaped) integrated in the same conductive layer. Conductive bridges are then made at the crossroads between the rows and the columns, usually with a thin layer of insulation and a deposit of conductive material or micro-wires. In this case we obtain a configuration with a single conductive layer, which allows to produce a structure less thick and potentially less expensive.
    [0002] Controlling interface configurations are also known in which the measuring electrodes are formed as individual electrodes distributed in a matrix arrangement in a conductive layer. This matrix arrangement of the electrodes has advantages in terms of detection capability. In particular, if it is implemented with sufficient sensitivity detection electronics, it makes it possible to unambiguously detect several control objects simultaneously, in contact and / or remotely. For example, document WO 2011/015794 discloses a method and a control interface device that makes it possible to simultaneously detect a plurality of control objects in contact with and / or away from the interface. This interface comprises a matrix of capacitive measurement electrodes protected according to their rear face by an active guard. The capacitive sensing electronics measure the capacitive coupling between the measuring electrodes and nearby objects (in so-called "self capacitance" mode). Thanks in particular to the use of the guard, it has a dynamic and sufficient sensitivity to allow the detection of objects in contact with the detection surface, and at a distance of several centimeters from this detection surface.
    [0003] The electrode matrix may be in the form of a conductive layer with an ITO deposit. The active guard can also be made in the form of an ITO conductive layer placed under the measurement electrode layer (relative to the measurement zone) and separated from this electrode layer by an insulating dielectric layer.
    [0004] Usually, in these configurations, the measuring electrodes are individually connected to the control electronics by connecting tracks which are drawn together in the same conductive layer. There may then be a problem of parasitic coupling between the link tracks and the control objects. Indeed, when a control object is in the immediate vicinity or in contact with the detection surface above a connecting track portion, parasitic capacitive coupling is established between this connection track and this object. . This parasitic capacitive coupling can generate a false detection because it can be interpreted by the detection electronics as a coupling between the object and the measuring electrode to which the connecting track is connected. The parasitic coupling between a connecting track and an object is of very low value because, since the track is very narrow, its surface opposite the control object is very small. However, it may be sufficient to create disturbances in a capacitive interface capable of detecting objects at a distance, because it is of the same order of magnitude as the capacitive coupling which is established between a measuring electrode and an object remote from this electrode . Thus, a finger in contact with a connecting track can be interpreted as an object present at a distance from the measuring electrode to which the track is connected. To correct this problem, it is known to add a conductive layer above the electrode layer (relative to the detection surface) with a guard mask. This guard mask is arranged to extend above the connecting tracks, and comprises openings facing the measuring electrodes. Thus, a control object near or in contact with the detection surface can generate capacitive coupling only with the electrodes and not with the connecting tracks because they are protected by the guard mask. For example, documents JP 2009-86240 and WO 2014/076363 describe such configurations. However, this solution has the disadvantage of requiring an additional layer of conductive material, which is penalizing in terms of thickness and cost.
    [0005] The object of the present invention is to propose a capacitive detection device with individual measuring electrodes which makes it possible to solve disadvantages of the prior art. The object of the present invention is also to propose such a capacitive detection device which makes it possible to minimize parasitic interactions with the connection tracks. The present invention also aims to provide such a capacitive sensing device that can be implemented with a minimum of conductive layers. Another object of the present invention is to propose such a capacitive detection device which has a minimum thickness. The present invention also aims to provide such a capacitive sensing device capable of being superimposed or integrated with a display screen, and compatible with production techniques usually employed. DESCRIPTION OF THE INVENTION This object is achieved with a capacitive sensing device, comprising a plurality of individual capacitive measuring electrodes distributed along a measuring surface, and connecting tracks respectively connected to said measuring electrodes, which device is characterized in that the measuring electrodes and the connecting tracks are arranged in two distinct visually transparent layers separated by an electrically insulating insulation material. The capacitive detection device according to the invention may thus comprise a plurality of measuring electrodes that can be individually used to perform a capacitive coupling measurement with one or more objects of interest in the vicinity. It may also include link tracks that allow the electrodes (or each electrode) to be individually connected to a detection electronics outside the measurement surface. The capacitive sensing device according to the invention can be embodied in the form of a succession or a stack of layers of material, including a layer with the measurement electrodes, a layer with the connecting tracks, and a layer of insulation material interposed between the electrodes and the connecting tracks. The layered distribution must be interpreted as a superimposition of zones with the different materials mentioned but it is understood that the separations are not necessarily strict and the materials of certain layers (such as the insulation material) can be also present in some other layers (such as the layer with the measuring electrodes). The layers are said to be "visually transparent" (or transparent) in the sense that they are at least sufficiently transparent to allow viewing, in conditions that are acceptable by transparency, an image resulting for example from a display screen to which the capacitive detection device would be superimposed or in which it would be integrated.
    [0006] The capacitive detection device according to the invention can thus be generally visually transparent or transparent. According to embodiments, the capacitive sensing device according to the invention may comprise an insulating material arranged in the form of an insulating layer extending opposite the measuring electrodes. The capacitive device according to the invention may also comprise electrical connections passing between said measuring electrodes and the connecting tracks. In this case, the insulation material may be distributed so as to cover at least the backside (relative to the measuring surface) of the electrodes. The connecting tracks can be connected to "their" electrode by means of an electrical connection through openings in the layer of insulating material. According to embodiments, the capacitive detection device 25 according to the invention may comprise an insulation material essentially located between the connecting tracks and the measuring electrodes not connected to said connection tracks. In this case, the insulating material can be placed solely or essentially between the connecting tracks and the electrodes to be isolated from these tracks, for example by following the path of these tracks. According to embodiments, the capacitive detection device according to the invention may comprise: an organic insulation material; - a mineral insulation material; A resin or a photosensitive polymer ("photoresist" in English); an insulation material with a thickness of less than 10 microns; an insulating material with a thickness of less than 5 microns; an insulating material with a thickness of between 1 micron and 4 microns. According to embodiments, the capacitive detection device according to the invention may comprise measurement electrodes distributed according to any one of the following provisions: in a matrix arrangement; - according to an arrangement in lines and in orthogonal or substantially orthogonal columns; - in an arrangement in rows and columns forming between them an angle different from 90 degrees; in a disposition having a circular structure or symmetry; - according to any provision compatible with the needs of the measure. According to embodiments, the capacitive detection device according to the invention may comprise measuring electrodes and / or connecting tracks made with any of the following materials: a material which is generally transparent and electrically conductive ; a transparent conducting oxide (TCO), for example based on zinc oxide (ZnO, etc.), tin oxide, zinc oxide doped with aluminum oxide (AZO), oxide indium, cadmium oxide; ITO (indium tin oxide); a material based on sub-micrometric metal wires, that is to say comprising metal wires of diameter less than one micrometer, or even nanometric, for example silver; a "metal mesh" material, based on a mesh or a network of metal wires of sub-nanometric or even nanometric diameter; a material based on carbon nanotubes or graphene. The term "electrically conductive material" refers to a sufficiently conductive material for the intended capacitive sensing application, it being understood that this material may be resistive. Of course, the measuring electrodes and the connecting tracks can be made of different materials. The connecting tracks can also be made with metal deposits of a few microns in width. According to embodiments, the capacitive detection device according to the invention may further comprise a guard plane formed in the form of a layer of electrically conductive material disposed opposite the measuring electrodes relative to the electrodes. liaison tracks. This guard plane serves in particular to protect the measuring electrodes parasitic capacitive couplings with the environment. It is preferably polarized at the same potential as the measurement electrodes, so as to provide active guard. According to embodiments, the capacitive detection device according to the invention may further comprise at least one so-called "electrode guard" plane of conductive material interposed between at least a portion of the measurement electrodes. This or these electrode guard planes may in particular be made in the same layer as the measurement electrodes. The capacitive detection device according to the invention may also comprise connecting tracks arranged at least partly opposite an electrode guard plane. Thus, the capacitive sensing device according to the invention may comprise connecting tracks of which at least some parts pass under an electrode guard plane, relative to the measuring surface. This electrode guard plane serves in particular to protect the connection tracks of parasitic capacitive couplings with objects of interest in contact with or above the measuring surface. It is preferably biased at the same potential as the measuring electrodes and the connecting tracks, so as to achieve an active guard. According to embodiments, the capacitive detection device according to the invention may comprise connecting tracks arranged at least partly opposite measurement electrodes. In this case, it may comprise connecting tracks of which at least some parts pass under measurement electrodes, relative to a detection surface. According to embodiments, the capacitive sensing device according to the invention may comprise connecting tracks arranged partly opposite measurement electrodes and partly facing guard planes. 'electrode. In another aspect, there is provided a method of producing a capacitive sensing device comprising a plurality of individual capacitive measuring electrodes distributed along a measurement surface and connecting tracks respectively connected to said measuring electrodes, which method is comprising steps of producing the measuring electrodes and connecting tracks in the form of two distinct visually transparent layers separated by an electrically insulating insulation material. The method according to the invention may comprise in particular steps: deposition on a dielectric substrate of a layer of electrically conductive material, structured so as to produce at least the measurement electrodes; depositing a layer of insulating material; depositing a layer of electrically conductive material, structured so as to at least carry out the connecting tracks. According to embodiments, the method according to the invention may further comprise steps of: depositing on a second dielectric substrate a layer of structured electrically conductive material so as to form a guard plane ; - Bonding (or lamination) of said guard plane on the layer constituting the connecting tracks and / or the layer of insulating material by means of a transparent adhesive (OCA, "optically clear adhesive" in English). In another aspect, there is provided an apparatus comprising a display device and a capacitive sensing device according to the invention. According to embodiments: the capacitive detection device can be superimposed on the display device. the apparatus according to the invention may comprise a display device of the LCD (liquid crystal display) or OLED (organic light-emitting diode) type, English), and a capacitive sensing device at least partially integrated with the constituent layers of the display device. The device according to the invention can be in particular of one of the following types: smartphone, tablet, computer, device or display screen. According to embodiments, the capacitive detection device 15 according to the invention can be used as a capacitive interface device for controlling an apparatus. In this case, it is used to detect objects of interest (such as fingers, a stylus, ...) that are used as control objects to interact with the device. The invention thus makes it possible to produce a capacitive detection device 20 or a capacitive interface device based on an array of individual electrodes in which the measurements are not disturbed by the connection tracks. Indeed, insofar as these connection tracks are essentially located under the electrodes or under the electrode guard plane, significant capacitive coupling can not be established between them and the control objects. Thanks to the use of a very thin organic insulation, the routing of the tracks on a different layer of the electrode layer does not induce a significant increase in thickness. In addition, the manufacturing method of the invention is fully compatible with current industrial processes used for mass production, since it uses an organic insulator which is normally used only for making local bridges. , for example to make crosses tracks or electrodes of the same layer. The invention thus includes both an original capacitive sensing device architecture, and an equally original manufacturing mode in that it deflects industrial process steps normally used in another way.
    [0007] DESCRIPTION OF THE FIGURES AND EMBODIMENTS Other advantages and particularities of the invention will appear on reading the detailed description of implementations and non-limiting embodiments, and the following appended drawings: FIG. 1 illustrates a block diagram of a capacitive interface device according to the invention; FIG. 2 illustrates a capacitive interface device of the prior art, with measuring electrodes and connecting tracks made on the same layer, FIG. 3 illustrates an example of layer structures in a capacitive interface device of the prior art, FIGS. 4 (a) and FIG. 4 (b) illustrate examples of layer structures in capacitive interface devices according to the invention; FIG. 5 illustrates an embodiment of capacitive interface device according to the invention, in a view from below, - FIG. 6 illustrates another embodiment of capacitive interface device according to the invention, with a guard plane between the electrodes. It is understood that the embodiments which will be described in the following are in no way limiting. It will be possible to imagine variants of the invention comprising only a selection of characteristics subsequently described isolated from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from the state of the prior art. This selection comprises at least one preferably functional feature without structural details, or with only a portion of the structural details if this portion alone is sufficient to provide a technical advantage or to differentiate the invention from the prior art . In particular, all the variants and all the embodiments described are combinable with one another if there is nothing to prevent this combination from the technical point of view. In the figures, the elements common to several figures retain the same reference. Firstly, with reference to FIG. 1, a block diagram of capacitive interface device according to the invention. In the embodiment shown, this interface device is intended to be superimposed on a display screen 14. It comprises capacitive measurement electrodes 12 distributed over a measurement surface or panel 11 (or at least opposite of such a surface). These electrodes 12 are arranged in a matrix arrangement. The capacitive interface device also comprises a guard 13 of conductive material which is interposed between the display screen 14 and the electrodes 12, according to their rear face (relative to the measuring surface 11). This guard 13 is biased to the same electrical potential as the electrodes 12. It is intended to protect the electrodes 12 parasitic couplings with the display 14 or the device, avoiding the appearance of leakage capabilities. The capacitive electrodes 12 are connected to a capacitive detection electronics 15 which makes it possible to determine, by measurement of the direct capacitive coupling ("self capacitance" mode), the position (X, Y, Z) of objects of interest or of control 10 in contact with the measuring surface 11 or nearby in a detection zone. More specifically, the capacitive sensing electronics 15 measure the capacitance that is established between the electrodes 12 and the control object or objects 10. As the capacitance between a measurement electrode 12 and a control object 10 is a inverse function of the distance separating them, it is possible to directly deduce a distance information (Z) from the control object 10 relative to the electrode 12. The position in the measurement surface 11 of the electrode 12 allows to locate the position (X, Y) of the control object 10 in the plane of this measurement surface 11. Various types of detection electronics 15 may be implemented within the scope of the invention. For example, it is possible to implement a detection principle based on a charge amplifier and an active guard. The electrodes 12 are excited at an excitation potential, for example by an oscillator. For the measurement, they are connected to a charge amplifier-type circuit which generates an output voltage which is a function of the capacitance between these measurement electrodes 12 and one or more control objects 10. The guard 13 is polarized at the same potential as the electrodes 12, for example by a voltage follower assembly. Thus, it can not appear parasitic capacitances between the guard 13 and the electrodes 12 because they are at the same potential.
    [0008] It is also possible to implement a detection principle based on an electronic referenced to a floating potential, as described for example in the document WO 2011/015794. In this case, the detection electronics 15 comprise a sensitive part, connected to the electrodes 12, which is referenced to an alternating reference potential generated for example by an oscillator. This sensitive portion also comprises a charge amplifier type circuit which generates an output voltage depending on the capacitance between the measurement electrodes 12 and one or more control objects 10. The guard 13 is also biased to this reference AC potential. Thus, as before, insofar as the guard 13 is biased at the same potential as the electrodes 12, it can not appear stray capacitances between them. This arrangement also has the advantage that it avoids the appearance of parasitic capacitances at the sensitive part of the electronics, which is also referenced to the alternative reference potential. This gives a better sensitivity and a better robustness to disturbances, which makes it possible in particular to detect control objects 10 at a greater distance from the control surface 11. In the two examples presented, the detection electronics 15 may comprise scanners or switches which sequentially connect the measuring electrodes 12 to the detection electronics 15, to measure their respective coupling capacitance with the control objects 10. In this case, preferably, the electrodes 12 which are not active are connected to the guard potential to avoid parasitic capacitances. Thus, the electrodes 12 are always at a potential substantially equal to the guard potential, whether they are active (connected to the detection electronics 15) or not. In both examples presented, the detection electronics 15 may also include a plurality of detection channels operating in parallel, so as to "interrogate" a plurality of measurement electrodes 12 simultaneously. Insofar as the capacitive interface device according to the invention is intended to be superimposed (or integrated) on a display screen 14, the elements that constitute it, including the measurement electrodes 12 and the guard plane 13, must be sufficiently transparent to allow viewing of the display in good conditions. According to the most commonly used industrial techniques, the measurement electrodes 12 and the guard plane 13 are made by deposits of sufficiently conductive and transparent materials, such as ITO (indium-tin oxide). In order to measure the coupling capacitances between the electrodes 12 and control objects 10, it is necessary to be able to individually connect all the electrodes 12 of the measurement panel 11 to the detection electronics 15. Referring to FIG. 2, in the capacitive devices of the prior art, the connection between the electrodes 12 and the detection electronics 15 is achieved by means of ITO connection tracks 20 drawn or deposited in the same layer as the measurement electrodes 12 This provision has disadvantages. Indeed, the tracks must pass between the electrodes. This requires moving the electrodes away, which causes spatial resolution to be lost, and / or varying the size of the electrodes as a function of the number of tracks to be passed between them, as illustrated in FIG. 2. In the latter case, further differences in sensitivity are introduced between these electrodes 12. The connection tracks 20, when they are made of ITO, must have a relatively large width, for example of the order of 100 pm, to limit the resistivity. Thus, in addition to the width necessary for their passage between the electrodes 12, they also constitute surfaces that can couple capacitively with objects 10 nearby, and disturb the measurements. This situation is illustrated in FIG. 2. It can be estimated that a control object 10 in the form of a finger in contact with the measuring surface through a protective glass in the area represented by the circle 21 generates on the connecting track 20 an electrode 22 has a coupling capacitance 5 of the order of 100 ff. This capacitance, when measured by the detection electronics 15, is interpreted as an object "seen" by this electrode 22, and thus located at the position represented by the circle 23 opposite this electrode. 22. However, this capacity of 100 ff corresponds to the capacitive coupling with the electrode 22 of a finger situated at about 2 mm from this electrode 22. It is thus possible to generate very awkward "ghost" detections. This estimate is obtained by applying the planar capacitor formula: C = cocrS / D, where dc) is the dielectric permitivity of the vacuum, Er the relative permitivity of the material, S the equivalent surface of the electrodes opposite and D their distance. For the calculations, a finger with a diameter of 10 mm and a protective glass with a thickness of 0.8 mm and a relative permitivity cr = 7.4 are considered. To avoid disturbances due to parasitic couplings with the link tracks, prior art devices often include an upper guard plane arranged to cover these link tracks. Fig. 3 illustrates a representative example of an embodiment of a capacitive interface device of the prior art, with such an upper guard. This capacitive interface device comprises a succession of conducting layers made in the form of ITO deposits deposited on dielectric substrates. These layers are then assembled by layers of optical adhesive (OCA) with a thickness of the order of 25 pm to 50 pm. The dielectric substrate may be, for example, PET (polyethylene terephthalate) with a thickness in the range of 25 μm to 100 μm, or glass. More specifically, the interface device as illustrated in FIG. 3 comprises: - a dielectric guard substrate 30; A guard plane 13, made in the form of a layer of ITO deposited on the dielectric guard substrate 30; a first layer of optical adhesive 31; a dielectric electrode substrate 32; measuring electrodes 12 and connecting tracks 20 made in the form of an ITO layer deposited on the electrode dielectric substrate 32; a second layer of optical adhesive 33; an upper guard dielectric substrate 34; an upper guard plane 36, made in the form of an ITO layer deposited on the upper guard dielectric substrate 34; a third layer of optical adhesive 35; A protective glass 37. As explained above, the upper guard plane 36 is intended to protect the connection tracks from interactions with control objects 10. It therefore extends essentially above the spaces between the measurement electrodes. 12 in which are inserted these link tracks. This arrangement has the disadvantage of requiring an ITO layer above the layer of electrodes and tracks, to achieve the upper guard. However, the implementation of this ITO layer also requires a substrate layer (PET) and an additional optical adhesive layer. This has consequences, in particular, an increase in the total thickness of the interface, a loss of transparency and an additional cost. This additional cost is generated in particular by the presence of an additional lamination step (that is to say, bonding on the optical adhesive layer) during manufacture. With reference to Figs. 4 (a) and FIG. 4 (b), exemplary embodiments of layer structures in the capacitive interface according to the invention will now be described.
    [0009] In the embodiment shown in FIG. 4 (a), the interface device comprises: - a conductive layer, for example made of ITO, with the measurement electrodes 12. This conductive layer is deposited on a dielectric substrate -16- of electrodes 55, for example PET (Polyethylene terephthalate) with a thickness of the order of 25 pm to 100 pm; a layer of insulating material 53, which is deposited on the layer of measuring electrodes 12. This insulating material 53 is an organic insulator normally used in the form of very localized deposits for making bridge connections (" bridges "), that is to say connections between elements of the electrode layer that span other electrical connections of the same layer of electrodes. In the context of the invention, it is used in the form of a separation layer between the electrodes 12 and the 10 connecting tracks 20. This insulator has the advantage of allowing the realization of very thin layers, of the order of 1 to 2 pm. By way of non-limiting example, the insulation material 53 may be a polymer or a photoresist in the type of those used in photolithography; connecting tracks 20 made in the form of a conducting layer 15, for example made of ITO. These connecting tracks 20 are made in the form of a layer distinct from the layer of the electrodes 12, which is deposited on the layer of insulating material 53. They are each connected to a measurement electrode 20 by a connection made to the through the layer of insulating material 53, for example of ITO; A conductive guard layer which forms a guard plane 13. This guard conductive layer is deposited on a dielectric guard substrate 51, for example made of PET. a protective glass 54, whose surface constitutes or materializes the measurement surface; A first transparent adhesive layer (OCA) 52, placed between the layer of insulation material 52 with the connecting tracks 20 and the guard plane 13; a second layer of transparent adhesive (OCA) 56, placed between the dielectric electrode substrate 55 and the protective glass 54.
    [0010] The transparent adhesive layers have a typical thickness in the range of 25 μm to 75 μm. The interface device shown in FIG. 4 (a) may for example be realized by implementing the following steps: - an embodiment of a first assembly consisting of the dielectric electrode substrate 55, measurement electrodes 12, the insulation layer 53 and linking tracks 20, in particular with layer deposition steps; an embodiment of a second assembly consisting of the guard dielectric substrate 51 and the guard layer 13; - An assembly of these first and second sets, and the protective glass 54, by bonding with the transparent adhesive. It should be noted that the first and second assemblies are assembled in the form of a sandwich with the measuring electrodes 12, the connecting tracks 20 and the guard 13 facing each other between the dielectric electrode substrate 55 and the substrate dielectric guard 51. FIG. 4 (b) illustrates a second layer structure embodiment in an interface device according to the invention.
    [0011] This embodiment differs from that of FIG. 4 (a) in that the measuring electrodes 12, the insulating layer 53 and connecting tracks 20 are deposited directly on the protective glass 54. This allows for a thinner system since it comprises a layer of substrate and one less clear adhesive layer.
    [0012] With the exception of these differences, the interface device of FIG. 4 (b) and its method of manufacture are identical to that of FIG. 4 (a), also everything that has been described in connection with the embodiment of FIG. 4 (a) is applicable to the embodiment of FIG. 4 (b). Fig. 5 illustrates an embodiment of the invention in which the connecting tracks 20 are placed under the measurement electrodes 12. This arrangement is made possible with the invention since these connecting tracks 20 are on a different layer of the electrodes 12. This embodiment can be achieved in particular with the layer structures shown in FIGS. 4 (a) and FIG. 4 (b). It has advantages: the measuring electrodes 12 can be of the same size; - The connection tracks can be in capacitive coupling with control objects 10 in the spaces between the electrodes 12, so with very limited exposed surfaces. FIG. 6 illustrates an embodiment of the invention in which an electrode guard plane 60 is introduced between the measuring electrodes 12, in the same layer. In practice, the measurement electrodes 12 and the electrode guard plane 60 are made in the same layer of ITO, structured accordingly. The electrode guard plane 60 is biased at the same potential as the guard plane 13. The link tracks 20, which are as before on a different layer of the measurement electrodes 12, are essentially placed under the plane. electrode guard 60 which thus serves to protect them electrically. This arrangement has the advantage of allowing a minimization of the parasitic coupling possibilities between the connection tracks 20 and the control objects 10. Indeed, in the arrangement of FIG. 6, the connecting tracks 20 can be exposed to such parasitic coupling only in the gap between the measuring electrode 12 to which they are connected and the electrode guard plane 60. This embodiment can be realized especially with the layer structures shown in FIGS. 4 (a) and FIG. 4 (b). According to embodiments, the capacitive measurement interface according to the invention can be integrated into the display screen. It can in particular be integrated in a screen based on LCD (liquid crystal display) or OLED (organic light-emitting diode) dies. It may in particular comprise a measurement layer and / or or a lower guard layer interposed in layers of the display. It may also include a measurement layer and / or a lower guard layer shared or confused with a control layer of the display. In particular, it may comprise a measurement layer or a lower guard layer merged with the common potential layer of the display, corresponding for example to the so-called "Vcom" layer of an LCD matrix display or to the "anode" layer 30 of an OLED-based display. Of course, the invention is not limited to the examples that have just been described and many adjustments can be made to these examples without departing from the scope of the invention.
    权利要求:
    Claims (17)
    [0001]
    REVENDICATIONS1. A capacitive sensing device comprising a plurality of individual capacitive measuring electrodes (12) distributed along a measuring surface, and connecting tracks (20) respectively connected to said measuring electrodes (12), which device is characterized in that that the measuring electrodes (12) and the connecting tracks (20) are arranged in two distinct visually transparent layers separated by an electrically insulating insulation material (53).
    [0002]
    2. The device of claim 1, which comprises an insulating material (53) arranged in the form of an insulating layer extending opposite the measuring electrodes (12). 15
    [0003]
    3. The device of claim 1, which comprises an insulating material (53) substantially located between the connecting tracks (20) and the measuring electrodes (12) not connected to said connecting tracks (20). 20
    [0004]
    4. The device of one of the preceding claims, which comprises an organic insulation material (53).
    [0005]
    5. The device of one of the preceding claims, which comprises an insulating material (53) with a thickness of less than 10 microns. 25
    [0006]
    6. The device of claim 1, which comprises measuring electrodes (12) distributed according to any one of the following provisions: - according to a matrix arrangement - according to an arrangement in lines and in orthogonal columns; 30 - in an arrangement in rows and columns forming between them an angle different from 90 degrees; in a disposition having a circular structure or symmetry.
    [0007]
    7. The device of one of the preceding claims, which comprises measurement electrodes (12) and / or connecting tracks (20) made with any of the following materials: a material which is generally transparent and conductive to the 'electricity ; a transparent conductive oxide; - ITO (indium tin oxide); a material based on sub-micrometric metal wires; a material of the "metal mesh" type; a material based on carbon nanotubes or graphene. 10
    [0008]
    The device of one of the preceding claims, which further comprises a guard plane (13) formed as a layer of electrically conductive material disposed opposite the measuring electrodes (12). relative to the connecting tracks (20).
    [0009]
    9. The device of one of the preceding claims, which further comprises at least one so-called "electrode guard" plane (60) of conductive material interposed between at least a portion of the measuring electrodes (12).
    [0010]
    The device of claim 9, which comprises connecting tracks (20) disposed at least in part opposite an electrode guard plane (60). 25
    [0011]
    11. A method of producing a capacitive sensing device comprising a plurality of individual capacitive measuring electrodes (12) distributed along a measuring surface and connecting tracks (20) respectively connected to said measuring electrodes (12), which characterized in that it comprises steps of producing the measuring electrodes (12) and connecting tracks (20) in the form of two distinct visually transparent layers separated by an insulating insulation material (53). electricity. 15 20
    [0012]
    12. The method of claim 11, which comprises steps of: depositing on a dielectric substrate (54, 55) a layer of electrically conductive material structured so as to produce at least the electrodes of measure (12); depositing a layer of insulating material (53); depositing a layer of electrically conductive material, structured so as to at least carry out the connecting tracks (20).
    [0013]
    The method of claim 12, which further comprises steps of: depositing on a second dielectric substrate (51) a layer of electrically conductive material structured so as to form a guard plane (13) ; bonding said guard plane (13) to the layer constituting the connecting tracks (20) and / or the layer of insulating material (53) by means of a transparent adhesive (52).
    [0014]
    Apparatus comprising a display device (14) and a capacitive sensing device according to one of claims 1 to 10.
    [0015]
    The apparatus of claim 14, wherein the capacitive sensing device is superimposed on the display device (14).
    [0016]
    The apparatus of claim 14, which includes an LCD or OLED type display device, and a capacitive sensing device at least partially integrated with the constituent layers of the display device.
    [0017]
    17. The apparatus of one of claims 14 to 16, which is of one of the following types: smartphone, tablet, computer, device or display screen. 30
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3032287A1|2016-08-05|MULTILAYER CAPACITIVE DETECTION DEVICE, AND APPARATUS COMPRISING THE DEVICE
    EP2748698B1|2015-11-04|Switched-electrode capacitive-measurement device for touch-sensitive and contactless interfaces
    FR3028062A1|2016-05-06|CAPACITIVE CONTROL INTERFACE DEVICE INTEGRATED WITH A DISPLAY SCREEN
    EP2795438B1|2018-09-12|Pressure-sensitive capacitive measurement device and method for touch-sensitive and contactless interfaces
    FR3043220A1|2017-05-05|CAPACITIVE SENSOR DEVICE COMPRISING ADJUSTED ELECTRODES
    EP2766769B1|2017-08-23|Display device including a multifunctional and communicating surface
    WO2011015795A2|2011-02-10|Capacitive detection device having function integration
    FR2952444A1|2011-05-13|LIQUID CRYSTAL STEREOSCOPIC DISPLAY DEVICE COMPRISING A TOUCH SCREEN AND METHOD FOR MANUFACTURING THE SAME
    FR2976675A1|2012-12-21|INTEGRATED CAPACITIVE MEASUREMENT CIRCUIT WITH FLOATING BRIDGE.
    WO2012114008A1|2012-08-30|Capacitive gestural interface with measurement mode switching
    US9842862B2|2017-12-12|Flexible electronic device with anti-interference structures and manufacturing method thereof
    WO2012069771A1|2012-05-31|Tactile sensor and associated method of manufacture
    EP2556354B1|2019-10-23|Pressure sensor device, method for manufacturing such a sensor and use of same for producing a touch-sensitive screen
    WO2016034380A1|2016-03-10|Control interface device and fingerprint sensor
    WO2014183932A1|2014-11-20|Capacitive control interface device and method adapted for the implementation of highly resistive measurement electrodes
    EP3455709B1|2020-06-03|Capacitive interface device with mixed electrode structure, and apparatus comprising the device
    EP2511799A1|2012-10-17|Method for manufacturing a matrix tactile sensor and associated matrix tactile sensor
    FR3005176A1|2014-10-31|TOUCH SENSOR
    FR2974198A1|2012-10-19|Method for manufacturing matrix tactile sensor i.e. resistive matrix tactile sensor, used in tactile screen for simultaneous detection of contact points on tactile detection area, involves forming conductive tracks that extend into area
    同族专利:
    公开号 | 公开日
    FR3032287B1|2018-03-09|
    US10318032B2|2019-06-11|
    US20180032187A1|2018-02-01|
    WO2016126893A1|2016-08-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS636829Y2|1981-12-09|1988-02-26|
    US20120050203A1|2010-08-27|2012-03-01|Osoinach Bryce T|Touch sensor controller for driving a touch sensor shield|
    US20130162596A1|2010-10-18|2013-06-27|Gunze Limited|Touch switch|
    CN102455831A|2010-10-22|2012-05-16|上海天马微电子有限公司|Touch screen and touch liquid crystal display|
    WO2014188057A1|2013-05-21|2014-11-27|Nokia Corporation|Capacitive touch sensor|
    US20150029144A1|2013-07-23|2015-01-29|Lg Display Co., Ltd.|Display device|
    CN204102115U|2013-09-12|2015-01-14|阿尔卑斯电气株式会社|Input media|
    WO2015101700A1|2013-12-30|2015-07-09|Nokia Technologies Oy|Using touch sensors as an electromagnetic shield|WO2018134081A1|2017-01-23|2018-07-26|Fogale Nanotech|Capacitive device for detecting an electrically floating object|US3743865A|1971-12-29|1973-07-03|W Riechmann|Proximity switch|
    JP2507329B2|1986-06-27|1996-06-12|株式会社日立製作所|Method for manufacturing eutectic semiconductor ordered structure|
    US5483261A|1992-02-14|1996-01-09|Itu Research, Inc.|Graphical input controller and method with rear screen image detection|
    US5880411A|1992-06-08|1999-03-09|Synaptics, Incorporated|Object position detector with edge motion feature and gesture recognition|
    US5488204A|1992-06-08|1996-01-30|Synaptics, Incorporated|Paintbrush stylus for capacitive touch sensor pad|
    GB9406702D0|1994-04-05|1994-05-25|Binstead Ronald P|Multiple input proximity detector and touchpad system|
    US5546005A|1995-01-09|1996-08-13|Flowline Inc.|Guarded capacitance probe and related measurement circuit|
    DE19536198B4|1995-09-28|2006-03-30|Endress + Hauser Gmbh + Co. Kg|Capacitive switch|
    DK0780674T3|1995-12-22|2000-04-03|Envec Mess Und Regeltechn Gmbh|Pressure measuring device with screen electrode|
    US5825352A|1996-01-04|1998-10-20|Logitech, Inc.|Multiple fingers contact sensing method for emulating mouse buttons and mouse operations on a touch sensor pad|
    US5956415A|1996-01-26|1999-09-21|Harris Corporation|Enhanced security fingerprint sensor package and related methods|
    US5835079A|1996-06-13|1998-11-10|International Business Machines Corporation|Virtual pointing device for touchscreens|
    FR2756048B1|1996-11-15|1999-02-12|Nanotec Ingenierie|FLOATING CAPACITIVE MEASUREMENT BRIDGE AND ASSOCIATED MULTI-CAPACITIVE MEASUREMENT SYSTEM|
    US6310610B1|1997-12-04|2001-10-30|Nortel Networks Limited|Intelligent touch display|
    KR100595920B1|1998-01-26|2006-07-05|웨인 웨스터만|Method and apparatus for integrating manual input|
    US6188391B1|1998-07-09|2001-02-13|Synaptics, Inc.|Two-layer capacitive touchpad and method of making same|
    JP4542637B2|1998-11-25|2010-09-15|セイコーエプソン株式会社|Portable information device and information storage medium|
    US6847354B2|2000-03-23|2005-01-25|The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration|Three dimensional interactive display|
    US6593755B1|2000-07-31|2003-07-15|Banner Engineering Corporation|Method and apparatus for detection sensor shielding|
    JP3800984B2|2001-05-21|2006-07-26|ソニー株式会社|User input device|
    JP2003173237A|2001-09-28|2003-06-20|Ricoh Co Ltd|Information input-output system, program and storage medium|
    US6690387B2|2001-12-28|2004-02-10|Koninklijke Philips Electronics N.V.|Touch-screen image scrolling system and method|
    FR2844048B1|2002-08-30|2005-09-30|Nanotec Solution|SYSTEM AND METHOD FOR NON-CONTACT MEASUREMENT OF RELATIVE DISPLACEMENT OR POSITIONING OF TWO ADJACENT OBJECTS BY CAPACITIVE PATH, AND APPLICATION TO MIRROR CONTROL|
    FR2844349B1|2002-09-06|2005-06-24|Nanotec Solution|CAPACITIVE SENSOR PROXIMITY DETECTOR|
    US7005864B2|2002-10-21|2006-02-28|Synchrony, Inc.|Capacitive position sensing system with resonant amplification|
    US7663607B2|2004-05-06|2010-02-16|Apple Inc.|Multipoint touchscreen|
    JP4531469B2|2004-07-15|2010-08-25|株式会社フジクラ|Capacitive proximity sensor|
    US8479122B2|2004-07-30|2013-07-02|Apple Inc.|Gestures for touch sensitive input devices|
    US7310033B2|2004-08-19|2007-12-18|Teravicta Technologies, Inc.|MEMS switch electrode configuration to increase signal isolation|
    FR2884349B1|2005-04-06|2007-05-18|Moving Magnet Tech Mmt|BITABLE POLARIZED ELECTROMAGNETIC ACTUATOR WITH QUICK ACTUATION|
    JP5395429B2|2005-06-03|2014-01-22|シナプティクスインコーポレイテッド|Method and system for detecting capacitance using sigma delta measurement|
    US7301350B2|2005-06-03|2007-11-27|Synaptics Incorporated|Methods and systems for detecting a capacitance using sigma-delta measurement techniques|
    FR2888319B1|2005-07-07|2008-02-15|Nanotec Solution Soc Civ Ile|METHOD FOR NON-CONTACT MEASUREMENT OF RELATIVE DISPLACEMENT OR RELATIVE POSITIONING OF A FIRST OBJECT IN RELATION TO A SECOND OBJECT INDUCINGLY.|
    FR2893711B1|2005-11-24|2008-01-25|Nanotec Solution Soc Civ Ile|DEVICE AND METHOD FOR CAPACITIVE MEASUREMENT BY FLOATING BRIDGE|
    KR100794521B1|2005-12-17|2008-01-16|삼성전자주식회사|Capacitor array|
    US7589390B2|2006-03-10|2009-09-15|Teledyne Technologies, Incorporated|Shielded through-via|
    JP4913490B2|2006-07-18|2012-04-11|株式会社山武|Capacity type electromagnetic flow meter|
    KR101294731B1|2007-06-04|2013-08-16|삼성디스플레이 주식회사|Array substrate, display panel having the array substrate and method of manufacturing the array substrate|
    JP2009086240A|2007-09-28|2009-04-23|Citizen Holdings Co Ltd|Liquid crystal module|
    CN101815956B|2007-10-04|2013-07-10|株式会社藤仓|Capacitive proximity sensor and proximity detection method|
    DE102007047716A1|2007-10-05|2009-04-09|Robert Bosch Gmbh|Sensor device for capacitive distance determination|
    KR101237640B1|2008-01-29|2013-02-27|멜파스|Touchscreen apparatus having structure for preventing forming of parasitic capacitance|
    JP4945483B2|2008-02-27|2012-06-06|株式会社日立ディスプレイズ|Display panel|
    US7696056B2|2008-05-02|2010-04-13|Micron Technology, Inc.|Methods of forming capacitors|
    JP2010061405A|2008-09-03|2010-03-18|Rohm Co Ltd|Capacitance sensor, detection circuit thereof, input device, and control method of capacity sensor|
    KR101511162B1|2008-12-01|2015-04-13|삼성전자주식회사|Multi touch sensing circuit|
    DE102009031824A1|2009-07-03|2011-01-05|Huf Hülsbeck & Fürst Gmbh & Co. Kg|Capacitive sensor arrangement with a sensor electrode, a shield electrode and a background electrode|
    CN101943975B|2009-07-09|2015-12-16|敦泰科技有限公司|Super-thin mutual capacitance touch screen and combined super-thin touch screen|
    GB0913734D0|2009-08-06|2009-09-16|Binstead Ronald P|Masked touch sensors|
    FR2948997B1|2009-08-07|2012-04-20|Nanotec Solution|CAPACITIVE PRESSURE SENSOR INCLUDING TEMPERATURE MEASUREMENT COMPATIBLE WITH HOT ENVIRONMENTS.|
    FR2949008B1|2009-08-07|2011-09-16|Nanotec Solution|CAPACITIVE DETECTION DEVICE WITH FUNCTION INTEGRATION.|
    FR2949007B1|2009-08-07|2012-06-08|Nanotec Solution|DEVICE AND METHOD FOR CONTROL INTERFACE SENSITIVE TO A MOVEMENT OF A BODY OR OBJECT AND CONTROL EQUIPMENT INCORPORATING THIS DEVICE.|
    TW201124766A|2010-01-08|2011-07-16|Wintek Corp|Display device with touch panel|
    JP5791593B2|2010-04-20|2015-10-07|ユニファイド イノヴェイティヴ テクノロジー， エルエルシー|Liquid crystal display panel and liquid crystal display device|
    US8923014B2|2010-08-19|2014-12-30|Lg Display Co., Ltd.|Display device having touch panel|
    JP5353991B2|2010-11-30|2013-11-27|株式会社日本自動車部品総合研究所|Capacitive occupant detection device|
    TWM422119U|2010-12-30|2012-02-01|Egalax Empia Technology Inc|Capacitive touch screen|
    FR2971066B1|2011-01-31|2013-08-23|Nanotec Solution|THREE-DIMENSIONAL MAN-MACHINE INTERFACE.|
    FR2971867B1|2011-02-21|2013-02-22|Nanotec Solution|GESTURE CAPACITIVE INTERFACE WITH MEASUREMENT MODE SWITCHING.|
    US20120229414A1|2011-03-08|2012-09-13|Qrg Limited|Position sensing panel|
    FR2976688B1|2011-06-16|2021-04-23|Nanotec Solution|DEVICE AND METHOD FOR GENERATING AN ELECTRICAL POWER SUPPLY IN AN ELECTRONIC SYSTEM WITH A VARIABLE REFERENCE POTENTIAL.|
    US20130050132A1|2011-08-26|2013-02-28|Analog Devices, Inc.|Techniques for capacitive touch screen control|
    KR20130057637A|2011-11-24|2013-06-03|삼성전기주식회사|Touch sensing apparatus|
    FR2985048B1|2011-12-21|2014-08-15|Nanotec Solution|PRESSURE-SENSITIVE CAPACITIVE MEASUREMENT DEVICE AND METHOD FOR TOUCH-FREE CONTACT INTERFACES|
    FR2985049B1|2011-12-22|2014-01-31|Nanotec Solution|CAPACITIVE MEASURING DEVICE WITH SWITCHED ELECTRODES FOR TOUCHLESS CONTACTLESS INTERFACES|
    EP2812779A4|2012-02-10|2015-09-23|3M Innovative Properties Co|Mesh patterns for touch sensor electrodes|
    FR2988176B1|2012-03-13|2014-11-21|Nanotec Solution|CAPACITIVE MEASUREMENT METHOD BETWEEN AN OBJECT AND AN ELECTRODE PLAN BY PARTIAL SYNCHRONOUS DEMODULATION|
    FR2988553B1|2012-03-23|2015-03-27|Fogale Nanotech|CAPACITIVE DETECTION DEVICE INTEGRATING A METAL TRACK ON A TRANSPARENT GUARD.|
    FR2990020B1|2012-04-25|2014-05-16|Fogale Nanotech|CAPACITIVE DETECTION DEVICE WITH ARRANGEMENT OF CONNECTION TRACKS, AND METHOD USING SUCH A DEVICE.|
    US9581628B2|2012-05-04|2017-02-28|Apple Inc.|Electronic device including device ground coupled finger coupling electrode and array shielding electrode and related methods|
    US9411474B2|2012-11-15|2016-08-09|Nokia Technologies Oy|Shield electrode overlying portions of capacitive sensor electrodes|
    US8829926B2|2012-11-19|2014-09-09|Zrro Technologies Ltd.|Transparent proximity sensor|
    FR3004551A1|2013-04-15|2014-10-17|Fogale Nanotech|MULTIZONE CAPACITIVE DETECTION METHOD, DEVICE AND APPARATUS USING THE METHOD|
    FR3005763B1|2013-05-17|2016-10-14|Fogale Nanotech|DEVICE AND METHOD FOR A CAPACITIVE CONTROL INTERFACE ADAPTED TO THE IMPLEMENTATION OF ELECTRODES OF HIGHLY RESISTIVE MEASUREMENTS|
    FR3008809B1|2013-07-18|2017-07-07|Fogale Nanotech|CUSTOM ACCESSORY DEVICE FOR AN ELECTRONIC AND / OR COMPUTER APPARATUS, AND APPARATUS EQUIPPED WITH SUCH AN ACCESSORY DEVICE|
    JP6146565B2|2013-08-06|2017-06-14|セイコーエプソン株式会社|Physical quantity sensors, electronic devices, and moving objects|
    US20150091842A1|2013-09-30|2015-04-02|Synaptics Incorporated|Matrix sensor for image touch sensing|
    FR3013472B1|2013-11-19|2016-07-08|Fogale Nanotech|COVERING ACCESSORY DEVICE FOR AN ELECTRONIC AND / OR COMPUTER PORTABLE APPARATUS, AND APPARATUS EQUIPPED WITH SUCH AN ACCESSORY DEVICE|
    FR3017723B1|2014-02-19|2017-07-21|Fogale Nanotech|METHOD OF MAN-MACHINE INTERACTION BY COMBINING TOUCH-FREE AND CONTACTLESS CONTROLS|
    FR3019320B1|2014-03-28|2017-12-15|Fogale Nanotech|BRACKET WATCH-TYPE ELECTRONIC DEVICE WITH CONTACTLESS CONTROL INTERFACE AND METHOD FOR CONTROLLING SUCH A DEVICE|
    US10444862B2|2014-08-22|2019-10-15|Synaptics Incorporated|Low-profile capacitive pointing stick|
    FR3028061B1|2014-10-29|2016-12-30|Fogale Nanotech|CAPACITIVE SENSOR DEVICE COMPRISING ADJUSTED ELECTRODES|
    US9818854B2|2015-04-30|2017-11-14|Semiconductor Components Industries, Llc|Electronic device including a bidirectional HEMT|FR3005763B1|2013-05-17|2016-10-14|Fogale Nanotech|DEVICE AND METHOD FOR A CAPACITIVE CONTROL INTERFACE ADAPTED TO THE IMPLEMENTATION OF ELECTRODES OF HIGHLY RESISTIVE MEASUREMENTS|
    FR3028061B1|2014-10-29|2016-12-30|Fogale Nanotech|CAPACITIVE SENSOR DEVICE COMPRISING ADJUSTED ELECTRODES|
    FR3051266B1|2016-05-12|2019-07-05|Fogale Nanotech|CAPACITIVE INTERFACE DEVICE WITH MIXED ELECTRODE STRUCTURE, AND APPARATUS COMPRISING THE DEVICE|
    TW201837685A|2017-04-14|2018-10-16|瑞鼎科技股份有限公司|Capacitive touch panel|
    法律状态:
    2016-01-08| PLFP| Fee payment|Year of fee payment: 2 |
    2016-08-05| PLSC| Publication of the preliminary search report|Effective date: 20160805 |
    2016-11-04| TP| Transmission of property|Owner name: QUICKSTEP TECHNOLOGIES LLC, US Effective date: 20160929 |
    2017-01-12| PLFP| Fee payment|Year of fee payment: 3 |
    2017-12-11| PLFP| Fee payment|Year of fee payment: 4 |
    2019-12-16| PLFP| Fee payment|Year of fee payment: 6 |
    2020-12-10| PLFP| Fee payment|Year of fee payment: 7 |
    2021-12-14| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1550843A|FR3032287B1|2015-02-04|2015-02-04|MULTILAYER CAPACITIVE DETECTION DEVICE, AND APPARATUS COMPRISING THE DEVICE|
    FR1550843|2015-02-04|FR1550843A| FR3032287B1|2015-02-04|2015-02-04|MULTILAYER CAPACITIVE DETECTION DEVICE, AND APPARATUS COMPRISING THE DEVICE|
    US15/548,408| US10318032B2|2015-02-04|2016-02-03|Multilayer capacitive detection device, and apparatus comprising the device|
    PCT/US2016/016472| WO2016126893A1|2015-02-04|2016-02-03|Multilayer capacitive detection device, and apparatus comprising the device|
    [返回顶部]