A vehicular display interface sensor device

Abstract

A vehicular display interface sensor device includes a touch sensor part (e.g. a projected capacitive sensor); a force sensor part comprising a piezoelectric layer (108); a pair of electrodes (120, 12

Description

TECHNICAL FIELD The present disclosure relates broadly to a vehicular display interface sensor device, a method of forming a vehicular display interface sensor device, a vehicular display interface apparatus and more particularly, to an automotive display interface sensor device. BACKGROUND Touchscreens are commonly used in displays for the vehicular field such as for automotives. Touchscreens can fulfil dual functions of acting as a display and as a human machine interface (HMI), and can enable a user or a driver to control e.g. an infotainment system without mechanical switches. One approach to enable touch sensing for a touchscreen is to use projected capacitance technology (PCAP). A PCAP sensor is typically made of an electrically insulating substrate supporting a set of conductive electrodes and an electronic chip (touch controller). A PCAP sensor operates by measuring the perturbations produced by an object (e.g. a human finger) entering the electric field existing between the electrodes when the electrodes are electrically energised. Such perturbations can be represented by a variation of the capacitance between the electrodes. A touch controller is typically used for measuring the capacitance variation and transforming / converting the measured capacitance variation into a digital signal. For such a touchscreen, the electrodes and the substrate are provided optically transparent in order not to interfere with images produced for display on the touchscreen, e.g. by a liquid-crystal display (LCD) module of the touchscreen. Transparent conductive oxide (TCO) such as Indium Tin Oxide (ITO) are materials typically used for electrodes. Glass is typically used for the substrate. In addition to these materials, refractive index matching layers are typically included in the stack to compensate for the optical losses resulting from a mismatch of the glass and ITO refractive indexes. For constructing the touchscreen, for touch sensing, different stack and electrode configurations are possible. The electrodes can either be placed on one side of a substrate or can be distributed between two sides of a substrate. In one configuration of interest to the inventors, in the so-called One Glass Solution (OGS) technology, a cover glass acts as the touch sensor substrate and the electrodes are placed on the (one) same side of the glass. The inventors recognise that OGS may provide a relatively thin, relatively optically superior and relatively cheap type of out-cell PCAP construction, as compared to other available constructions for touch sensing. Having considered touchscreens in the vehicular field, the inventors have recognised that PCAP touchscreens have one significant drawback. In a moving vehicle, especially on a bumpy road, a driver may steady his / her finger / hand near a touchscreen and this may typically be sufficient to cause an unintended operation via the touchscreen. For example, a capacitance variation without an actual touch may be detected. Such a phenomenon may be referred to as a ghost touch. Furthermore, bumps in the road or other e.g. sudden or unexpected vehicle movements can cause a driver to select a wrong input option shown on the touchscreen (e.g. press the wrong menu option), leading to prolonged distraction while the inadvertent or incorrect input is being undone. This may happen with an unexpected vehicle movement causing an incorrect touch or mere contact on the touchscreen. Hence, there exists a need for a vehicular display interface sensor device, a method of forming a vehicular display interface sensor device and a vehicular display interface apparatus that seek to address at least one of the above problems. SUMMARY In accordance with an aspect of the present disclosure, there is provided a vehicular display interface sensor device, the device comprising a touch sensor part comprising a touch sensor substrate; a first pair of electrodes disposed on the touch sensor substrate, the first pair of electrodes being spaced apart from each other to define a detection region, the first pair of electrodes having at least one electrode capable of being coupled to a touch sensor processor and the first pair of electrodes is arranged to detect a first electrical characteristic within the detection region; a force sensor part comprising a piezoelectric layer; a second pair of electrodes with both electrodes of the second pair of electrodes disposed on a same side of the piezoelectric layer, the second pair of electrodes having at least one electrode capable of being coupled to a force sensor processor; wherein the piezoelectric layer is poled in a direction parallel to a plane of the second pair of electrodes disposed on the same side of the piezoelectric layer; and wherein the second pair of electrodes is arranged to detect a second electrical characteristic that the piezoelectric layer is capable of generating upon application of a force on a display cover layer of a vehicular display interface apparatus and transmitted to the piezoelectric layer. The touch sensor part may be provided as a part of a display layer. The touch sensor part and the force sensor part may be provided within a stack of layers. The first pair of electrodes may be provided as the second pair of electrodes. That is, the first pair of electrodes may be the same pair of electrodes as the second pair of electrodes. The touch sensor substrate may be provided as the piezoelectric layer. That is, the touch sensor substrate may be the same layer as the piezoelectric layer. The touch sensor substrate may be provided as a part of the display cover layer of a vehicular display interface apparatus. The second pair of electrodes may comprise a third electrode and a fourth electrode, the third electrode capable of being coupled to a first grid line and the fourth electrode capable of being coupled to a second grid line; further wherein the fourth electrode is provided substantially surrounding the third electrode on the same side of the piezoelectric layer and the fourth electrode comprises a grid line gap on the same side of the piezoelectric layer for allowing passage of the first grid line. The second pair of electrodes may comprise a third electrode and a fourth electrode, the third electrode capable of being coupled to a third grid line and the fourth electrode capable of being coupled to a fourth grid line; further wherein the fourth electrode is provided substantially surrounding the third electrode on the same side of the piezoelectric layer; and further wherein the fourth electrode is coated with a dielectric separation material at least in an area of passage of the third grid line, the dielectric separation material being provided as a bridge layer for the third grid line to be overlaid over the fourth electrode. The second pair of electrodes may be provided on the same side of the piezoelectric layer as an interdigitated electrode pattern. In accordance with another aspect of the present disclosure, there is provided a method of forming a vehicular display interface sensor device, the method comprising forming a touch sensor part comprising providing a touch sensor substrate; disposing a first pair of electrodes on the touch sensor substrate, the first pair of electrodes being spaced apart from each other to define a detection region, the first pair of electrodes having at least one electrode capable of being coupled to a touch sensor processor; arranging the first pair of electrodes to detect a first electrical characteristic within the detection region; forming a force sensor part comprising providing a piezoelectric layer; disposing a second pair of electrodes with both electrodes of the second pair of electrodes disposed on a same side of the piezoelectric layer, the second pair of electrodes having at least one electrode capable of being coupled to a force sensor processor; poling the piezoelectric layer in a direction parallel to a plane of the second pair of electrodes disposed on the same side of the piezoelectric layer; and arranging the second pair of electrodes to detect a second electrical characteristic that the piezoelectric layer is capable of generating upon application of a force on a display cover layer of a vehicular display interface apparatus and transmitted to the piezoelectric layer. The method may further comprise forming the touch sensor as a part of a display layer. The method may further comprise providing the touch sensor part and the force sensor part within a stack of layers. The method may further comprise disposing the first pair of electrodes as the second pair of electrodes. The method may further comprise providing the piezoelectric layer as the touch sensor substrate. The method may further comprise providing the touch sensor substrate as a part of a display cover layer of the vehicular display interface sensor device. The second pair of electrodes may comprise a third electrode and a fourth electrode, the third electrode capable of being coupled to a first grid line and the fourth electrode capable of being coupled to a second grid line; and the method may further comprise providing the fourth electrode substantially surrounding the third electrode on the same side of the piezoelectric layer and providing the fourth electrode to comprise a grid line gap on the same side of the piezoelectric layer for allowing passage of the first grid line. The second pair of electrodes may comprise a third electrode and a fourth electrode, the third electrode capable of being coupled to a third grid line and the fourth electrode capable of being coupled to a fourth grid line; and the method may further comprise providing the fourth electrode substantially surrounding the third electrode on the same side of the piezoelectric layer; and coating the fourth electrode with a dielectric separation material at least in an area of passage of the third grid line, the dielectric separation material being provided as a bridge layer for the third grid line to be overlaid over the fourth electrode. The method may further comprise providing the second pair of electrodes on the same side of the piezoelectric layer as an interdigitated electrode pattern. In accordance with yet another aspect of the present disclosure, there is provided a vehicular display interface apparatus, the apparatus comprising a display cover layer to accept a user interaction with the apparatus; a display layer to generate a graphical user interface display to a user; a touch sensor processor for sensing a user touch via detection of a first electrical characteristic; a force sensor processor for sensing a user force on the display cover layer; a vehicular display interface sensor device comprising a touch sensor part comprising a touch sensor substrate; a first pair of electrodes disposed on the touch sensor substrate, the first pair of electrodes being spaced apart from each other to define a detection region, the first pair of electrodes having at least one electrode coupled to the touch sensor processor and the first pair of electrodes is arranged to detect the first electrical characteristic within the detection region; a force sensor part comprising a piezoelectric layer; a second pair of electrodes with both electrodes of the second pair of electrodes disposed on a same side of the piezoelectric layer, the second pair of electrodes having at least one electrode coupled to the force sensor processor; wherein the piezoelectric layer is poled in a direction parallel to a plane of the second pair of electrodes disposed on the same side of the piezoelectric layer; and wherein the second pair of electrodes is arranged to detect a second electrical characteristic that the piezoelectric layer is capable of generating upon application of a force on the display cover layer of the vehicular display interface apparatus and transmitted to the piezoelectric layer. The touch sensor processor and the force sensor processor may be provided as a single processor. The vehicular display interface sensor device may be as described in the above aspect. BRIEF DESCRIPTION OF THE DRAWINGS Exemplary embodiments of the present disclosure will be better understood and readily apparent to one of ordinary skill in the art from the following written description, by way of example only, and in conjunction with the drawings, in which: FIG. 1 is a schematic block diagram for illustrating a vehicular display interface sensor device in an exemplary embodiment. FIG. 2A is a schematic side view drawing of a force sensor part of a vehicular display interface sensor device in an exemplary embodiment. FIG. 2B is an expanded view of the dotted area in FIG. 2A. FIG. 3 is a schematic drawing of a display stack in an exemplary embodiment. FIG. 4 is a schematic drawing of a display stack in another exemplary embodiment. FIG. 5 is a schematic drawing of a One Glass Solution (OGS)-type vehicular display interface sensor device in an exemplary embodiment. FIG. 6 is a schematic drawing of a display stack for illustrating the One Glass Solution (OGS)-type vehicular display interface sensor device of FIG. 5. FIG. 7A is a schematic front-view or top-view diagram of a coplanar electrode circuit arrangement in an exemplary embodiment. FIG. 7B is a schematic cross-sectional view diagram of the coplanar electrode circuit arrangement along line A-A’ of FIG. 7A. FIG. 7C is a magnified view of a section of an electrode pair at the dotted portion of the coplanar electrode circuit arrangement of FIG. 7A. FIG. 8A is a schematic front-view or top-view diagram of a coplanar electrode circuit arrangement in another exemplary embodiment. FIG. 8B is a schematic cross-sectional view diagram of the coplanar electrode circuit arrangement along line A-A’ of FIG. 8A. FIG. 80 is a schematic cross-sectional view diagram of the coplanar electrode circuit arrangement along line B-B’ of FIG. 8A. FIG. 8D is a magnified view of an electrode pair at section X of FIG. 8A. FIG. 8E is a magnified view of an electrode pair at section Y of the FIG. 80. FIG. 9A is a schematic drawing illustrating a vehicular display interface apparatus in an exemplary embodiment. FIG. 9B is a schematic drawing illustrating a vehicular display interface apparatus in another exemplary embodiment. FIG. 10 is a schematic block diagram for illustrating a vehicular display interface apparatus in an exemplary embodiment. FIG. 11 is a schematic flowchart for illustrating a method of forming a vehicular display interface sensor device in an exemplary embodiment. FIG. 12 is a schematic flowchart for illustrating a method of forming the display stack of FIG. 3. FIG. 13 is a schematic flowchart for illustrating a method of using the display stack of FIG. 3. FIG. 14 is a schematic flowchart for illustrating a method of forming the coplanar electrode circuit arrangement of FIG. 7A. FIG. 15 is a schematic flowchart for illustrating a method of using the coplanar electrode circuit arrangement of FIG. 7A. DETAILED DESCRIPTION In exemplary embodiments, a vehicular display interface sensor device is provided. Exemplary embodiments of the vehicular display interface sensor device can advantageously provide a touch and force sensor for a vehicular display interface apparatus such as a touch screen apparatus in a vehicle. The inventors have recognised that one possible solution to the identified issues may be to complement PCAP touch sensing with a mechanism to measure force produced by an object (e.g. a human finger) pressing a touchscreen display (i.e. application of a force on the display surface / cover). In considering providing a device to sense / detect touch and force, the inventors recognise that it is possible to make use of a layer of optically transparent piezoelectric material and a set of TCO electrodes. One possible way to integrate such a force sensor into a display stack is by arranging the electrodes to sandwich the piezoelectric material. In other words, there is provided an electrode on a top side / surface of a piezoelectric layer and another electrode provided on an opposing bottom side / surface of the piezoelectric layer. In such considerations, the piezoelectric material is poled in a direction perpendicular to the plane of the electrodes. In use, pressure produced by an object, e.g. a pressing finger, on a display surface / cover is transmitted and bends the display stack. Such transmitted force generates mechanical stresses directed along the plane of the piezoelectric layer. Due to the direct piezoelectric effect, an electric field and potential develops in-between the electrodes. As the electric field is perpendicular to the applied stresses or the generated / produced stresses along the plane of the piezoelectric layer, the piezoelectric material operates in a so-called dsi mode. In such considerations, the electrodes are connected to a force controller / processor which translates the analog electric potential or current sensed / detected across the electrodes into a digital signal which can later be processed into force information. The inventors further recognise that as piezoelectric materials are also dielectric, it is further possible to use a piezoelectric layer as a substrate of a touch sensor. As such, in this case, both touch and force sensing functionalities can be integrated into a single sensor module. In such a case, an example stack can comprise, from top down, a cover glass functioning as a display surface / cover, the cover glass adjacent to a combined force and touch sensor module that includes a first force and touch electrode, a piezoelectric layer and a second force and touch electrode, and the combined force and touch sensor module in turn being adjacent to a display layer such as a liquid-crystal display (LCD) module. In such an example, the first force and touch electrode is disposed on a top side / surface of the piezoelectric layer and the second force and touch electrode is disposed on an opposing bottom side / surface of the piezoelectric layer, both electrodes sandwiching the piezoelectric layer. The piezoelectric layer also functions as a touch sensor substrate. In such an example, a number of advantages may be obtained, such as reducing the amount of materials used (e.g. reduction of one layer acting as the touch sensor substrate and having one pair of electrodes functioning for both touch and force sensing / detection), reducing the thickness of the display stack and reducing the overall cost of the sensor modules. Having considered the above possible ways, the inventors further recognise that using a dsi piezoelectric transducer configuration requires TCO electrodes to be arranged on both sides of the piezoelectric material or layer. The inventors further recognise a number of possible issues may arise. One possible issue is manufacturing complexity. TCO electrodes are typically deposited by sputtering methods. Sputtering machines can typically only deposit material on one side of a substrate at a time. To deposit electrodes on two opposing sides, a first sputtering step has to be performed, followed by flipping over the substrate and then performing a second sputtering step. Such process steps impact the complexity and the overall cost of a mass production manufacturing process. In addition, besides deposition of material, patterning of the TCO electrodes may be required. Thus, additional steps for masking, lithography or laser etching have to be performed. Each additional instance of these steps may also affect the costs for manufacturing. Furthermore, it is recognised that, to compensate for optical losses, each ITO layer is matched with a refractive index matching layer. In terms of manufacturing, each TCO layer thus requires two material deposition steps (i.e. deposition of TCO followed by deposition of an index matching material). Such an additional process can have an even added complexity and cost to the manufacturing process. Another possible issue is optical quality. The more stacks there are provided between a display layer (such as a LCD layer / module) and the display surface / cover, the more degraded is the quality of the projected image from the display layer. Thus, the more TCO and refractive index layers provided, it is anticipated that the worse would be the display quality. Yet another issue that may be encountered is having incompatibility with the inventors’ interest in the One Glass Solution (OGS) technology. The inventors recognise above that a concept of a combined force and projected capacitance technology (PCAP) touch sensor can bring the discussed advantages. Furthermore, a merging of the concept with the OGS version of a PCAP touch sensor without adding an additional electrode layer can desirably produce a thin and low-cost version of a sensor device / module with relatively high optical performance. However, the inventors recognise an incompatibility issue in that as OGS touch sensors typically have a coplanar set of electrodes, such an arrangement is incompatible with dsi piezoelectric force sensors, which have electrodes placed on two different planes or two opposing sides of a piezoelectric layer. In consideration of the possible issues above, the inventors have provided a transparent piezoelectric transducer with coplanar electrodes that is suitable for human machine interfaces on vehicular displays. For the description herein, for the ease of illustration and explanation, a first and / or a second pair of electrodes are described. It will be appreciated that, practically, provision of a vehicular display interface sensor device and / or a vehicular display interface apparatus such as a touchscreen display may typically include a plurality of (or several) pairs of electrodes. Such electrodes may be arranged in different row and column arrangements. The exemplary embodiments described herein broadly pertain to provision of a piezoelectric material layer that is poled in a direction parallel to a plane (or coplanar arrangement) with respect to at least a pair of electrodes arranged co-planarly and disposed on one side / surface of the piezoelectric material layer. FIG. 1 is a schematic block diagram for illustrating a vehicular display interface sensor device in an exemplary embodiment. The vehicular display interface sensor device 102 comprises a touch sensor part 104 and a force sensor part 106. The touch sensor part 104 comprises a touch sensor substrate 108 and a first pair of electrodes 110 disposed on the touch sensor substrate 108. In this example, the first pair of electrodes 110 comprises a first electrode 112 and a second electrode 114. The first pair of electrodes 110 are spaced apart from each other to define a detection region. Refer to the space provided between the first electrode 112 and the second electrode 114. In this example, the first pair of electrodes 110 comprises at least one electrode 112, 114 capable of being coupled to a touch sensor processor (not shown) and the first pair of electrodes 110 is arranged to detect a first electrical characteristic within the detection region. For example, the first electrical characteristic may be a mutual capacitance reading or variation or detection upon a user’s touch on or near the touch sensor part 104, e.g. at a vehicular display interface. The force sensor part 106 comprises a piezoelectric layer 116 and a second pair of electrodes 118. In this example, the second pair of electrodes 118 comprises a third electrode 120 and a fourth electrode 122. Both electrodes of the second pair of electrodes 118, i.e. the third electrode 120 and the fourth electrode 122, are disposed on a same side / surface of the piezoelectric layer 116. That is, the third electrode 120 and the fourth electrode 122 are not provided on opposing sides, e.g. a top side and a bottom side, of the piezoelectric layer 116. In this example, the second pair of electrodes 118 comprises at least one electrode 120,122 capable of being coupled to a force sensor processor (not shown). In addition, the piezoelectric layer 116 is poled / polarised in a direction parallel to a plane of the second pair of electrodes 118 which are disposed on the same side / surface of the piezoelectric layer 116. With reference to FIG. 1, the polarization may be from the left to the right of the drawing or vice versa, i.e. a direction parallel to a plane of the second pair of electrodes 118. Furthermore, the second pair of electrodes 118 is arranged to detect a second electrical characteristic that the piezoelectric layer 116 is capable of generating upon application of a force on a display cover layer of a vehicular display interface apparatus and transmitted to the piezoelectric layer 116. For example, the second electrical characteristic may be an electric field change or voltage potential variation by the piezoelectric layer 116 and that may be sensed e.g. by the second pair of electrodes 118. A schematic arrow 124 is provided to schematically show an applied force that may be transmitted to the piezoelectric layer 116. As will be apparent from the description of other exemplary embodiments and drawings, various variations may be made to the above device 102. For example, a dotted relationship 126 is shown between the touch sensor part 104 and the force sensor part 106 to signify that some components of the touch sensor part 104 and the force sensor part 106 may be integrated. For example, in some exemplary embodiments, the first pair of electrodes 110 is provided as the second pair of electrodes 118. That is, it is possible that the first pair of electrodes 110 is the same as the second pair of electrodes 118, and that only two electrodes, for example only, the third electrode 120 and the fourth electrode 122 are provided for both the touch sensor part 104 and the force sensor part 106. For example, in some exemplary embodiments, the touch sensor substrate 108 is provided as the piezoelectric layer 116. That is, it is possible that the touch sensor substrate 108 is the same layer, i.e. the piezoelectric layer 116, and that only one dielectric layer, for example only, the piezoelectric layer 116 is provided for both the touch sensor part 104 and the force sensor part 106. As such, it is possible that with the displacement of the force sensing electrodes, e.g. the third and fourth electrodes 120, 122, with respect to the piezoelectric layer 116 and with the poling / polarization of the piezoelectric layer 116, both touch and force sensing may be provided by the sensor device to a vehicular display interface apparatus. FIG. 2A is a schematic side view drawing of a force sensor part of a vehicular display interface sensor device in an exemplary embodiment. FIG. 2B is an expanded view of the dotted area in FIG. 2A. The force sensor part 200 functions substantially identically as the force sensor part 106 as described with reference to FIG. 1. The force sensor part 200 of a vehicular display interface sensor device comprises a piezoelectric layer 202 and a plurality of electrodes e.g. 204. In FIG. 2B, two pairs of electrodes are shown. One pair of electrodes comprises a first electrode 206 and a second electrode 208. The pair of electrodes, the first electrode 206 and the second electrode 208, is disposed on a same side / surface of the piezoelectric layer 202. That is, the first electrode 206 and the second electrode 208 are not provided on opposing sides, e.g. a top side and a bottom side, of the piezoelectric layer 202. In this example, the pair of electrodes, the first electrode 206 and the second electrode 208, comprises at least one electrode 206,208 capable of being coupled to a force sensor processor (not shown). In addition, the piezoelectric layer 202 is poled / polarised in a direction that is parallel to a plane of the first electrode 206 and the second electrode 208 which are disposed on the same side / surface of the piezoelectric layer 202. With reference to FIG. 2B, the polarisation may be from the left to the right of the drawing or vice versa, i.e. a direction parallel to a plane of the pair of electrodes 204. Furthermore, the first electrode 206 and the second electrode 208 are arranged to detect an electrical characteristic that the piezoelectric layer 202 is capable of generating upon application of a force on a display cover layer of a vehicular display interface apparatus and transmitted to the piezoelectric layer 202. For example, the electrical characteristic may be an electric field change or voltage potential variation by the piezoelectric layer 202 that may be sensed by the first electrode 206 and the second electrode 208. In the exemplary embodiment, the design of the force sensor 200 allows the use of only one layer of a patterned transparent conductive oxide (TCO) electrode layer. The design is based on configuring the piezoelectric layer 202 and the plurality of electrodes e.g. 204 so that the piezoelectric layer 202 operates in d33 mode e.g. instead of dai mode. To achieve the mode, the plurality of electrodes e.g. 204 is located on a single side of the piezoelectric layer 202. In addition, e.g. during the manufacturing process, the piezoelectric layer 202 is poled in a direction that is parallel to the plane of the plurality of electrodes e.g. 204 that are disposed on the (one) same side / surface of the piezoelectric layer 202. Thus, such poling / polarisation is in contrast to the dai mode where a piezoelectric layer is otherwise poled in a direction perpendicular to the plane of electrodes. In the exemplary embodiment, the electric field resulting from the direct piezoelectric effect would thus develop along the same direction as the applied bending stresses. In such an example, the piezoelectric layer 202 operates in d33 mode. A schematic arrow 210 is provided in FIG. 2A to schematically show an applied force that is transmitted to the piezoelectric layer 202. The applied force may then result in the piezoelectric layer 202 experiencing tensile stress, or applied bending stresses, in a direction as shown by arrow 212. As a result of this strain, an electric field is generated in a direction that substantially parallel to the plane of the piezoelectric layer 202, such electric fields are as shown by arrow 214. Therefore, with the design of the force sensor part 200 of the vehicular display interface sensor device, with a configuration of coplanar electrodes disposed on a single side of the piezoelectric layer 202, i.e. instead of the need for a pair of electrodes sandwiching the piezoelectric / dielectric layer, manufacturing complexity may be usefully reduced. Furthermore, as lesser electrode layers, or TCO layers, are provided in the force sensor part 200, e.g. as compared to arranging a pair of electrodes to sandwich the piezoelectric layer 202 by disposing the electrodes on two sides / surfaces of the piezoelectric layer, optical quality issues or issues related to the quality of a projected image from a display layer may be mitigated. Even further, as coplanar electrodes are used in the force sensor part 200, the force sensor part 200 may usefully be compatible with the One Glass Solution (OGS) technology, i.e. as OGS touch sensors typically have a coplanar set of electrodes. As described, the vehicular display interface sensor device 102 of FIG. 1 may be varied in different exemplary embodiments. FIG. 3 is a schematic drawing of a display stack in an exemplary embodiment. The exemplary embodiment provides for a separate touch sensor part and a separate force sensor part, i.e. provided as two independent modules. The display stack 300 comprises a display cover layer 302 provided to accept a user interaction. For example, the display cover layer 302 may comprise a cover glass. A user interaction may include a human finger 304 touching the display cover layer 302. The display stack 300 further comprises a display layer 306 provided to generate a graphical user interface display to a user. For example, the display layer 306 may comprise a LCD module. The display stack 300 further comprises a vehicular display interface sensor device 308. The vehicular display interface sensor device 308 is substantially identical to the vehicular display interface sensor device 102 of FIG. 1. In the exemplary embodiment, the vehicular display interface sensor device 308 comprises a touch sensor part 310 that comprises a touch sensor substrate 312 and a first pair of electrodes, i.e. a first electrode 314 and a second electrode 316, disposed on the touch sensor substrate 312. The first pair of electrodes, i.e. the first electrode 314 and the second electrode 316, are spaced apart from each other to define a detection region. The first pair of electrodes, i.e. the first electrode 314 and the second electrode 316, is arranged to detect the first electrical characteristic within the detection region. For example, the first electrical characteristic may be a capacitance reading or variation or detection upon a user’s touch on or near the touch sensor part 310, e.g. at an external surface of the display cover layer 302. As such, the touch sensor part 310 may be a PCAP sensor part. Further, see the human finger 304 touching the display cover layer 302 as an example of a user’s touch. In the exemplary embodiment, the vehicular display interface sensor device 308 also comprises a force sensor part 318 that comprises a piezoelectric layer 320 and a second pair of electrodes, i.e. a third electrode 322 and a fourth electrode 324. Both of the second pair of electrodes, i.e. the third electrode 322 and the fourth electrode 324, are disposed on a same side / surface of the piezoelectric layer 320. In the exemplary embodiment, the piezoelectric layer 320 is poled / polarised in a direction parallel to a plane of the second pair of electrodes, i.e. the third electrode 322 and the fourth electrode 324, which are disposed on the same side / surface of the piezoelectric layer 320. The second pair of electrodes, i.e. the third electrode 322 and the fourth electrode 324, is arranged to detect a second electrical characteristic that the piezoelectric layer 320 is capable of generating upon application of a force on the display cover layer 302 of the display stack 300 and transmitted to the piezoelectric layer 320. See the human finger 304 touching the display cover layer 302 for an example of the force that may be applied. In the exemplary embodiment, for example, the second electrical characteristic may be an electric field change or voltage potential variation by the piezoelectric layer 320 and that may be sensed e.g. by the second pair of electrodes, i.e. the third electrode 322 and the fourth electrode 324. In the exemplary embodiment, the force sensor part 318 may comprise additional layers (additional to the piezoelectric layer 320 and the electrodes layer with the second pair of electrodes, i.e. the third electrode 322 and the fourth electrode 324). The additional layers that may be provided in the force sensor part 318 are shown in parenthesis in FIG. 3. For example, the force sensor part 318 may additionally comprise backing substrate layers 326, 328. The backing substrates layers 326, 328 may be made of a transparent material such as polyethylene terephthalate (PET). The backing substrate layers 326, 328 may provide greater rigidity to the force sensor part 318 and allow easier handling of the force sensor part 318. In the exemplary embodiment, the electrode layer with the second pair of electrodes, i.e. the third electrode 322 and the fourth electrode 324, may be deposited on a backing substrate layer (e.g. see backing substrate layer 328) and subsequently be assembled with the piezoelectric layer 320. This may simplify the electrodes manufacturing step. In the exemplary embodiment, the force sensor part 318 may further comprise a number of Optically Clear Adhesive (OCA) layers 330, 332, 334 and 336. The OCA layers 330, 332, 334 and 336 may assist with the assembling of different layers of the force sensor part 318 and the assembling of the force sensor part 318 with the other components of the display stack 300, e.g. with the touch sensor part 310. In the exemplary embodiment, the force sensor part 318 may be disposed in different locations of the display stack 300. The force sensor part 318 may be disposed in-between the display cover layer 302 and the touch sensor part 312 (see arrow 338), or in-between the display layer 306 and the touch sensor part 312 (see arrow 340) or behind / below the display layer 306, away from the display cover layer 302 (see arrow 342). In other exemplary embodiments, the force sensor part 318 may be integrated into the display layer 306. In other exemplary embodiments, the touch sensor part 312 may be integrated into the display layer 306 (using the so called in-cell touch technology). Thus, the touch sensor part 312 is provided as a part of the display layer 306. In such exemplary embodiments, the force sensor part 318 may be disposed either in-between the display cover layer 302 and the display layer 306 or behind / below the display layer 306, away from the display cover layer 302. In other exemplary embodiments, the touching sensor part and the force sensor part may be integrated. For example, the first pair of electrodes of the touch sensor part is provided as the second pair of electrodes of the force sensor part, i.e. the first pair of electrodes is the same as the second pair of electrodes, and that only two electrodes for both the touch sensor part and the force sensor part. For example, the touch sensor substrate is provided as the piezoelectric layer. That is, the touch sensor substrate is the same layer, i.e. the piezoelectric layer of the force sensor part, and that only one dielectric layer of the force sensor part is provided for both the touch sensor part and the force sensor part. FIG. 4 is a schematic drawing of a display stack in another exemplary embodiment. The display stack 400 comprises a display cover layer 402 provided to accept a user interaction. The display cover layer 402 is substantially identical to the display cover layer 302 of FIG. 3. A user interaction may include a human finger 404 touching the display cover layer 402. The display stack 400 further comprises a display layer 406 provided to generate a graphical user interface display to a user. The display layer 406 is substantially identical to the display layer 306 of FIG. 3. The display stack 400 further comprises a vehicular display interface sensor device 408. In the exemplary embodiment, the vehicular display interface sensor device 408 comprises a piezoelectric layer 410 and a second pair of electrodes, i.e. a third electrode 412 and a fourth electrode 414. Both of the second pair of electrodes, i.e. the third electrode 412 and the fourth electrode 414, are disposed on a same side / surface of the piezoelectric layer 410. In the exemplary embodiment, the piezoelectric layer 410 is provided as a touch sensor substrate. Further, the second pair of electrodes, i.e. the third electrode 412 and the fourth electrode 414, is spaced apart from each other to define a detection region. The second pair of electrodes, i.e. the third electrode 412 and the fourth electrode 414, is arranged to detect a first electrical characteristic within the detection region. For example, the first electrical characteristic may be a capacitance reading or variation or detection upon a user’s touch on or near the vehicular display interface sensor device 408, e.g. at an external surface of the display cover layer 402. See the human finger 404 touching the display cover layer 402 as an example of a user’s touch. Thus, the third electrode 412 and the fourth electrode 414 are provided to function as touch sensor electrodes. In other words, in comparison to FIG. 1, the first pair of electrodes is provided as the second pair of electrodes, i.e. the same pair of electrodes. The touch sensor substrate is provided as the piezoelectric layer 410. In the exemplary embodiment, the piezoelectric layer 410 is poled / polarised in a direction parallel to a plane of the second pair of electrodes, i.e. the third electrode 412 and the fourth electrode 414, which are disposed on the same side / surface of the piezoelectric layer 410. The second pair of electrodes, i.e. the third electrode 412 and the fourth electrode 414, is arranged to detect a second electrical characteristic that the piezoelectric layer 410 is capable of generating upon application of a force on the display cover layer 402 of the display stack 400 and transmitted to the piezoelectric layer 410. See the human finger 404 touching the display cover layer 402 for an example of the force that may be applied. In the exemplary embodiment, for example, the second electrical characteristic may be an electric field change or voltage potential variation by the piezoelectric layer 41. and that may be sensed e.g. by the second pair of electrodes, i.e. the third electrode 412 and the fourth electrode 414. Thus, the third electrode 412 and the fourth electrode 414 are provided to also function as force sensor electrodes. Compare the second pair of electrodes of FIG. 1. In the exemplary embodiment, the vehicular display interface sensor device 408 provides an integrated touch and force sensor device that combines the functionalities of touch sensing and force sensing in a single module. In the exemplary embodiment, the vehicular display interface sensor device 408 may comprise additional layers (additional to the piezoelectric layer 410 and the electrodes layer with the second pair of electrodes, i.e. the third electrode 412 and the fourth electrode 414). The additional layers that may be provided in the vehicular display interface sensor device 408 are shown in parenthesis in FIG. 4. For example, the vehicular display interface sensor device 408 may additionally comprise backing substrate layers 416, 418. The backing substrate layers 416, 418 are substantially identical to the backing substrate layers 326, 328 as described with reference to FIG. 3. The vehicular display interface sensor device 408 may further comprise Optically Clear Adhesive (OCA) layers 420, 422, 424, 426. The OCA layers 420, 422, 424, 426 are substantially identical to the OCA layers 330, 332, 334 and 336 as described with reference to FIG. 3. The OCA layers 420, 422, 424, 426 may assist with the assembling of different layers of the vehicular display interface sensor device 408 and the assembling of the vehicular display interface sensor device 408 with the other components of the display stack 400, e.g. with the display cover layer 402. In the exemplary embodiment, the vehicular display interface sensor device 408, as a single module with the functionalities of touch sensing and force sensing, may be disposed in different locations of the display stack 400. The vehicular display interface sensor device 408 may be disposed in-between the display cover layer 402 and the display layer 406 (see arrow 428) or behind / below the display layer 406, away from the display cover layer 402 (see arrow 430). FIG. 5 is a schematic drawing of a One Glass Solution (OGS)-type vehicular display interface sensor device in an exemplary embodiment. The OGS-type vehicular display interface sensor device 500 comprises a display cover layer 502 provided to accept a user interaction. A user interaction may include a human finger 504 touching the display cover layer 502. The display cover layer 502 is coupled to a coplanar pair of electrodes, i.e. a third electrode 508 and a fourth electrode 510, on a same internal surface of the display cover layer 502. The OGS-type vehicular display interface sensor device 500 further comprises a piezoelectric layer 506. The piezoelectric layer 506 is disposed such that both of the coplanar pair of electrodes, i.e. the third electrode 508 and the fourth electrode 510, are disposed on a same side / surface of the piezoelectric layer 506. In the exemplary embodiment, the display cover layer 502 may function as a touch sensor substrate. Thus, the touch sensor substrate is provided as a part of the display cover layer 502. Further, the coplanar pair of electrodes, i.e. the third electrode 508 and the fourth electrode 510, is spaced apart from each other to define a detection region. The pair of electrodes, i.e. the third electrode 508 and the fourth electrode 510, is arranged to detect a first electrical characteristic within the detection region. For example, the first electrical characteristic may be a capacitance reading or variation or detection upon a user’s touch on or near the display cover layer 502, e.g. at an external surface of the display cover layer 502. See the human finger 504 touching the display cover layer 502 as an example of a user’s touch. Thus, the third electrode 508 and the fourth electrode 510 are provided to function as touch sensor electrodes. In other words, in comparison to FIG. 1, the first pair of electrodes is provided as the second pair of electrodes, i.e. the same pair of electrodes. In the exemplary embodiment, the piezoelectric layer 506 is poled / polarised in a direction parallel to a plane of the pair of electrodes, i.e. the third electrode 508 and the fourth electrode 510, which are disposed on the same side / surface of the piezoelectric layer 508. The pair of electrodes, i.e. the third electrode 508 and the fourth electrode 510, is arranged to detect a second electrical characteristic that the piezoelectric layer 506 is capable of generating upon application of a force on the display cover layer 502 and transmitted to the piezoelectric layer 506. See the human finger 504 touching the display cover layer 502 for an example of the force that may be applied. In the exemplary embodiment, for example, the second electrical characteristic may be an electric field change or voltage potential variation by the piezoelectric layer 506 and that may be sensed e.g. by the pair of electrodes, i.e. the third electrode 508 and the fourth electrode 510. Thus, the third electrode 508 and the fourth electrode 510 are provided to also function as force sensor electrodes. FIG. 6 is a schematic drawing of a display stack for illustrating the One Glass Solution (OGS)-type vehicular display interface sensor device of FIG. 5. In relation to FIG. 5, the display stack 600 further comprises a display layer 602 provided to generate a graphical user interface display to a user. The display layer 602 is substantially identical to e.g. the display layer 306 of FIG. 3. The display stack 600 comprises an OGS-type vehicular display interface sensor device 604 that is substantially similar to the OGS-type vehicular display interface sensor device 500 of FIG. 5. The OGS-type vehicular display interface sensor device 604 comprises a display cover layer 606 provided to accept a user interaction. A user interaction may include a human finger 608 touching the display cover layer 606. The display cover layer 606 is substantially identical to e.g. the display cover layer 502 of FIG. 5. The display cover layer 606 is coupled to a coplanar pair of electrodes, i.e. a third electrode 612 and a fourth electrode 614, on a same internal surface of the display cover layer 606. The OGS-type vehicular display interface sensor device 604 further comprises a piezoelectric layer 610 and both of the pair of electrodes, i.e. the third electrode 612 and the fourth electrode 614, are disposed on a same side / surface of the piezoelectric layer 610. In the exemplary embodiment, the OGS-type vehicular display interface sensor device 604 may comprise additional layers (additional to the display cover layer 606, the piezoelectric layer 610 and the electrodes layer with the pair of electrodes, i.e. the third electrode 612 and the fourth electrode 614). The additional layers that may be provided in the OGS-type vehicular display interface sensor device 604 are shown in parenthesis in FIG. 6. For example, the OGS-type vehicular display interface sensor device 604 may additionally comprise a backing substrate layer 616. The backing substrate layer 616 is substantially identical to e.g. the backing substrate layers 326, 328 described with reference to FIG. 3. The OGS-type vehicular display interface sensor device 604 may further comprise Optically Clear Adhesive (OCA) layers 618, 620, 622. The OCA layers 618, 620, 622 are substantially identical to e.g. the OCA layers 330, 332, 334 and 336 described with reference to FIG. 3. The OCA layers 618, 620, 622 may assist with the assembling of different layers of the OGS-type vehicular display interface sensor device 604 and the assembling of the OGS-type vehicular display interface sensor device 604 with the display layer 602. In the exemplary embodiment, the OGS-type vehicular display interface sensor device 604 is configured to provide an integrated touch and force sensor device that provides the functionalities of touch sensing and force sensing in a single module. In the OGS-type vehicular display interface sensor device 604, the piezoelectric layer 610 is disposed below the display cover layer 606. See arrow 624. In the described exemplary embodiments, the touch sensor part and the force sensor part are provided within a stack of layers. In some exemplary embodiments, the touch sensor part may be directly adjacent to the force sensor part. In some exemplary embodiments, the touch sensor part may be indirectly adjacent to the force sensor part. In some exemplary embodiments, the touch sensor part may have some parts integrated with the force sensor part. In various exemplary embodiments, one material that may be used for the electrodes I transparent electrodes is Indium Tin Oxide (ITO). Other conductive and optically transparent material may also be considered. For example, transparent conductive oxides (TOO) such as, but not limited to, fluorine-doped tin oxide (FTO), aluminium-doped zinc oxide (AZO), gallium-doped zinc oxide (GZO), and other materials like silver nanowires, carbon nanotubes and graphene thin films may also be considered. In various exemplary embodiments, one material that may be considered for the piezoelectric material is Polyvinylidene fluoride (PVDF). Other transparent piezoelectric layer such as, but not limited to, micro-nano piezoceramic films such as lead zirconate titanate (PZT), lead-free piezoceramics and polymer piezoelectric materials such as PVDF co-polymer and terpolymers and Poly(lactic) acid (PLA) can also be used as the piezoelectric layer. In various exemplary embodiments, if the touch sensor part and the force sensor part of a vehicular display interface sensor device are provided as two independent modules (e.g. see FIG. 3), the force sensor part and the touch sensor part can be either two independent subsystems or can be integrated into a single subsystem. In the former case, the touch and force measurement processes may also be performed independently and do not require synchronization. In the latter case, controlling schemes may be provided so as to perform touch and sensing measurements in a simultaneous or sequential manner. As an example, a separate touch sensor processor / controller and a separate force sensor processor / controller may be provided to separately perform touch and force measurement processes. With reference to FIG. 9A, a separate touch sensor processor / controller 902 and a separate force sensor processor / controller 904 are provided coupled respectively to a touch sensor part 906 and the force sensor part 908. In an alternative example, an integrated touch and force sensor processor / controller may be provided to separately perform touch and force measurement processes, or to perform touch and sensing measurements in a simultaneous or sequential manner. With reference to FIG. 9B, an integrated touch and force sensor processor / controller 910 is provided coupled to both a touch sensor part 912 and the force sensor part 914. For example, in a simultaneous measurement, a first electrical characteristic for touch sensing may be measured together with a second electrical characteristic for force sensing. For example, in a sequential measurement, a first electrical characteristic for touch sensing may be measured followed by a measurement of a second electrical characteristic for force sensing. The above may also apply in various exemplary embodiments where an integrated touch and force sensor device is provided which provides the combined functionalities of touch sensing and force sensing in a single module (e.g. see FIGs. 4, 5 and 6). In various exemplary embodiments, for the electrodes, different coplanar electrodes designs can be considered. In various exemplary embodiments with an integrated touch and force sensor device (e.g. see FIGs. 4, 5 and 6), designs used by touch sensor manufacturers may be a relevant option, as they may already be optimised and may be field proven designs for the touch sensing functionality. One of these designs is the so-called diamond pattern, with the X and Y electrodes each forming a chain of diamonds in the X and Y direction respectively. Coplanar diamond pattern electrodes may be in a single side ITO configuration (SITO), with the X and Y electrodes on the same side of a single substrate, or in an OGS configuration, wherein the X and Y electrodes may be disposed / deposited on the back of a cover glass. Alternative possible patterns such as the flower pattern, wherein the electrodes form a chain of flower shapes, and other various patterns may also be considered. In various exemplary embodiments, the above patterns may be compatible with d33 configured piezoelectric force sensors of exemplary embodiments and may be optimised for the touch sensing functionality. In the examples described below, various designs or circuit arrangements may be provided to enhance the force sensing functionality. FIG. 7A is a schematic front-view or top-view diagram of a coplanar electrode circuit arrangement in an exemplary embodiment. FIG. 7B is a schematic cross-sectional view diagram of the coplanar electrode circuit arrangement along line A-A’ of FIG. 7A. FIG. 7C is a magnified view of a section of an electrode pair at the dotted portion of the coplanar electrode circuit arrangement of FIG. 7A. In the exemplary embodiment, the coplanar electrode circuit arrangement comprises a plurality of electrode pairs e.g. 702. The electrode pairs e.g. 702 comprise pad-type coplanar electrodes. With reference to FIG. 7B, the electrode pairs e.g. 702 are disposed on a same side / surface of a piezoelectric layer 704, which is in turn provided adjacent to a display cover layer 706. The display cover layer 706 may comprise a cover glass. It will be appreciated that the drawing of FIG. 7B is shown as a “flipped” (or upsidedown) arrangement for illustration purposes, i.e. the display cover layer 706 is typically the top layer. In the exemplary embodiment, the plurality of electrode pairs e.g. 702 comprise an array of sensing electrode pairs. For discussion purposes, an electrode pair 702 is described. An electrode pair 702 comprises an inner electrode 708 surrounded by an outer electrode 710 that are not electrically connected to each other. That is, the inner electrode 708 is spaced apart from the outer electrode 710 to define a detection region. Compare e.g. a second pair of electrodes, or a third electrode and a fourth electrode, of a force sensor part. The electrode pair 702 is individually connected to an electrically connecting grid line pair 712. That is, the inner electrode 708 is connected to a first grid line of the grid line pair 712 while the outer electrode 710 is connected to a second grid line of the grid line pair 712. The outer electrode 710 is provided substantially surrounding the inner electrode 708 and on the same side of the piezoelectric layer 704. The outer electrode 710 comprises a grid line gap on the same side of the piezoelectric layer 704 for allowing passage of the connecting first grid line that connects the inner electrode 708. The grid line pairs e.g. 712 can be used to charge the electrode pairs e.g. 702, i.e. the inner electrode 708 and the outer electrode 710. The electrode pairs e.g. 702, i.e. the inner electrode 708 and the outer electrode 710, facilitate capacitance and force measurement. In use, when the electrode pairs e.g. 702 are electrically energised and when an object (e.g. a human finger) touches the display cover layer 706, the object disturbs the electric field existing between an electrode pair that is nearby, and thereby produce perturbations. Such perturbations can be represented by a variation of the capacitance between the electrodes in the electrode pair that is nearby. The measured capacitance variation can be transformed / converted to a digital signal (e.g. by a force sensor processor coupled to the electrode pair (not shown)) for force measurement. Thereby, the touch location on the display cover layer 706, by the object, can be determined / sensed. In the exemplary embodiment, for the coplanar electrode design to be optimised for force sensing functionality, the neighbouring edges of the electrode pairs e.g. 702, i.e. the inner electrode 708 and the outer electrode 710, can be designed to increase sensitivity for force sensing. One possible design is the comb-like pattern as shown in FIG. 7C. In the comb-like pattern, the electrode pair 702, i.e. the inner electrode 708 and the outer electrode 710, has a so-called tooth-edge electrode design with a series of a protruding part 714 and a subsequent concave aperture 716. In the exemplary embodiment, for the electrode pair 702, i.e. the inner electrode 708 and the outer electrode 710, the protruding part of one electrode (e.g. see numeral 714) is disposed in the corresponding concave part of the other electrode (e.g. see numeral 718). There is no contact between the protruding part of one electrode and the corresponding concave part of the other electrode, i.e. the inner electrode 708 and the outer electrode 710 are spaced apart. Thus, an interdigitated electrode pattern is formed, disposed on a same side / surface of the piezoelectric layer 704. With the interdigitated electrode pattern e.g. as shown in FIG. 7C, as the effective length of the borderline between the inner electrode 708 and the outer electrode 710 is increased, more effective area is gained. Thus, in use, during force measurement, output voltage response can be increased and the sensitivity of the electrodes can also be increased. FIG. 8A is a schematic front-view or top-view diagram of a coplanar electrode circuit arrangement in another exemplary embodiment. FIG. 8B is a schematic cross-sectional view diagram of the coplanar electrode circuit arrangement along line A-A’ of FIG. 8A. FIG. 8C is a schematic cross-sectional view diagram of the coplanar electrode circuit arrangement along line B-B’ of FIG. 8A. FIG. 8D is a magnified view of an electrode pair at section X of FIG. 8A. FIG. 8E is a magnified view of an electrode pair at section Y of the FIG. 8C. In the exemplary embodiment, the coplanar electrode circuit arrangement comprises a plurality of electrode pairs e.g. 802. The electrode pairs e.g. 802 comprise pad-type coplanar electrodes. With reference to FIGs. 8B and 8C, the electrode pairs e.g. 802 are disposed on a same side / surface of a piezoelectric layer 804, which is in turn provided adjacent to a display cover layer 806. The display cover layer 806 may comprise a cover glass. It will be appreciated that the drawings of FIGs. 8B and 8C are shown as a “flipped” (or upside-down) arrangement for illustration purposes, i.e. the display cover layer 806 is typically the top layer. In the exemplary embodiment, the coplanar electrode circuit arrangement has arrays of electrode pairs e.g. 802. For discussion purposes, an electrode pair 802 is described. An electrode pair 802, comprises a horizontally connected inner electrode 808 and a vertically connected outer electrode 810. The outer electrode 810 substantially surrounds the inner electrode 808. The inner electrode 808 is spaced apart from the outer electrode 810 to define a detection region. Compare e.g. a second pair of electrodes, or a third electrode and a fourth electrode, of a force sensor part. The coplanar electrode circuit arrangement further comprises a horizontal connecting third grid line 812 and a vertical fourth connecting grid line 814. The horizontally connected inner electrode 808 and the vertically connected outer electrode 810 are serially connected to the horizontal connecting third grid line 812 and the vertical fourth connecting grid line 814 respectively. In the exemplary embodiment, with reference to FIG. 8E, after forming the electrode layer, a dielectric layer is deposited and patterned over the electrode layer to form a dielectric insulating bridge layer 816. Thus, the vertical fourth connecting grid line 814 can be formed to connect the vertically connected outer electrode 810 (to other outer electrodes). The dielectric insulating bridge layer 816 may be maintained over at least an area of passage over the outer electrode 810 and the horizontal third connecting grid line 812 can be overlaid over the outer electrode 810, i.e. over the bridge layer 816. The electrode pair 802 comprising the vertically connected electrode 810 and horizontally connected electrode 808 is configured / arranged for capacitance sensing to sense the location of a user’s touch on the display cover layer 806 and for force measurement through the piezoelectric layer 804. The manner of capacitive location sensing and piezoelectric force sensing is substantially identical to the manner described with reference to FIG. 7. In the exemplary embodiment, the coplanar electrode circuit arrangement may usefully reduce the complexity of the design of the electrode connecting grid lines, i.e. the horizontal connecting grid line 812 and the vertical connecting grid line 814. This may make the coplanar electrode circuit arrangement of the exemplary embodiment applicable for large display panels. In the exemplary embodiment, with reference to FIG. 8E, electrical shorting between the horizontal grid lines 812 and the vertical grid lines 814 is prevented through the use of dielectric insulating bridge layers e.g. 816 disposed between the horizontally connected inner electrodes 808 and the vertically connected outer electrodes 810, and disposed at least in an area of passage of the horizontal third connecting grid lines e.g. 812. Thus, the horizontal third connecting grid lines, e.g. 812, connecting the inner electrodes, e.g. 808, can be overlaid over the bridge layer 816, over the outer electrodes e.g. 810. In the exemplary embodiment, for the coplanar electrode design to be optimised for force sensing functionality, for dss force sensitivity, a comb-like pattern may be applied to the design of the adjacent / neighbouring edges of the electrode pairs e.g. 802, i.e. the horizontally connected inner electrode 808 and the vertically connected outer electrode 810. Compare the comb-like pattern described with reference to FIG. 7C. In the comblike pattern, the electrode pair 802, i.e. the horizontally connected inner electrodes 808 and the vertically connected outer electrodes 810, has a so-called tooth-edge electrode design with a series of a protruding part 818 and a subsequent concave aperture 820. In the exemplary embodiment, for the electrode pair 802, i.e. the horizontally connected inner electrode 808 and the vertically connected outer electrode 810, the protruding part of one electrode (e.g. see numeral 818) is disposed in the corresponding concave part of the other electrode (e.g. see numeral 822). There is no contact between the protruding part of one electrode and the corresponding concave part of the other electrode, i.e. the horizontally connected inner electrode 808 and the vertically connected outer electrode 810 are spaced apart. Thus, an interdigitated electrode pattern is formed, disposed on a same side / surface of the piezoelectric layer 804. With the interdigitated electrode pattern e.g. as shown in FIG. 8D, as the effective length of the borderline between the horizontally connected inner electrode 808 and the vertically connected outer electrode 810 is increased, more effective area is gained. Thus, in use, during force measurement, output voltage response can be increased and the sensitivity of the electrodes can also be increased. With reference to FIGs. 7C and 8D, the inventors recognise that, to improve d33 force sensitivity, the comb like pattern may also be implemented on adjacent edges of electrodes in other coplanar electrode circuit arrangements such as the so-called diamond pattern or flower pattern etc. The above-described exemplary embodiments may provide a vehicular display interface sensor device that can be used with a vehicular display interface apparatus. FIG. 10 is a schematic block diagram for illustrating a vehicular display interface apparatus in an exemplary embodiment. The vehicular display interface apparatus 1002 comprises a display cover layer 1004 provided to accept a user interaction with the apparatus 1002. The vehicular display interface apparatus 1002 further comprises a display layer 1006 provided to generate a graphical user interface display to a user. For example, the display layer 1006 may comprise a LCD module. Further, the vehicular display interface apparatus 1002 comprises a touch sensor processor 1008 and a force sensor processor 1010. In some exemplary embodiments, a single processor (not shown) may comprise both the touch sensor processor 1008 and the force sensor processor 1010, e.g. an integrated processor. As an example, a dotted relationship 1012 is shown between the touch sensor processor 1008 and the force sensor processor 1010 to signify that the touch sensor processor 1008 and the force sensor processor 1010 may be integrated. The touch sensor processor 1008 is provided for sensing a user touch via detection of a first electrical characteristic. For example, the first electrical characteristic may be a capacitance variation detected by a touch sensor part. The force sensor processor 1010 is provided for sensing a user force applied on the display cover layer 904. A schematic arrow 1014 is provided to schematically show an applied force that may be transmitted to a piezoelectric layer of a force sensor part. The vehicular display interface apparatus 1002 further comprises a vehicular display interface sensor device 1016. The vehicular display interface sensor device 1016 is substantially similar to the vehicular display interface sensor device 102 of FIG. 1. In the exemplary embodiment, the vehicular display interface sensor device 1016 comprises a touch sensor part 1018 that comprises a touch sensor substrate 1020 and a first pair of electrodes, i.e. a first electrode 1022 and a second electrode 1024, disposed on the touch sensor substrate 10920. The first pair of electrodes, i.e. the first electrode 1022 and the second electrode 1024, are spaced apart from each other to define a detection region. The first pair of electrodes comprise at least one electrode (see first electrode 1022) coupled to the touch sensor processor 1008. The first pair of electrodes, i.e. the first electrode 1022 and the second electrode 1024, is arranged to detect the first electrical characteristic within the detection region. In the exemplary embodiment, the vehicular display interface sensor device 1016 also comprises a force sensor part 1026 that comprises a piezoelectric layer 1028 and a second pair of electrodes, i.e. a third electrode 1030 and a fourth electrode 1032. Both of the second pair of electrodes, i.e. the third electrode 1030 and the fourth electrode 1032, are disposed on a same side / surface of the piezoelectric layer 1028. The second pair of electrodes comprise at least one electrode (see fourth electrode 1032) coupled to the force sensor processor 1010. In addition, the piezoelectric layer 1028 is poled / polarised in a direction parallel to a plane of the second pair of electrodes, i.e. the third electrode 1030 and the fourth electrode 1032, which are disposed on the same side / surface of the piezoelectric layer 1028. The second pair of electrodes, i.e. the third electrode 1030 and the fourth electrode 1032, is arranged to detect a second electrical characteristic that the piezoelectric layer 1028 is capable of generating upon application of a force on the display cover layer 1004 of the vehicular display interface apparatus 1002 and transmitted to the piezoelectric layer 1028. See arrow 1014 for an example of the force that may be applied. In the exemplary embodiment, for example, the second electrical characteristic may be an electric field change or voltage potential variation by the piezoelectric layer 1028 and that may be sensed e.g. by the second pair of electrodes, i.e. the third electrode 1030 and the fourth electrode 1032. In FIG. 10, it is appreciated that various variations may be made to the vehicular display interface sensor device 1016. For example, a dotted relationship 1034 is shown between the touch sensor part 1018 and the force sensor part 1026 to signify that some components of the touch sensor part 1018 and the force sensor part 1026 may be integrated. For example, in some exemplary embodiments, the first pair of electrodes is provided as the second pair of electrodes. That is, it is possible that, for example only, the third electrode 1030 and the fourth electrode 1032 are provided as the electrodes for both the touch sensor part 1018 and the force sensor part 1026. For example, in some exemplary embodiments, the touch sensor substrate 1020 is provided as the piezoelectric layer 1028. That is, it is possible that the touch sensor substrate 1020 is the same layer, i.e. the piezoelectric layer 1028, and that only one dielectric layer, for example only, the piezoelectric layer 1028 is provided for both the touch sensor part 1018 and the force sensor part 1026. In the exemplary embodiment, the vehicular display interface apparatus 1002 can further comprise, but is not limited to, a memory (not shown). The memory may be coupled to the touch sensor processor 1008 and / or the force sensor processor 1010. The memory may comprise non-transitory computer-readable storage media, including, for example, read access memory (RAM), read-only memory (ROM), erasable programmable memory (e.g. EPROM and EEPROM), or flash memory. The memory may be configured to store instructions, e.g. for processing signals received from electrodes. In the exemplary embodiment, the vehicular display interface apparatus 1002 may also comprise a human-machine interface and one or more display panels, and may also be utilised in the field of sensing surfaces haptics. FIG. 11 is a schematic flowchart for illustrating a method 1100 of forming a vehicular display interface sensor device in an exemplary embodiment. In the exemplary embodiment, at step 1102, a touch sensor part is formed. For forming the touch sensor part, at step 1104, a touch sensor substrate is provided. At step 1106, a first pair of electrodes is disposed on the touch sensor substrate, the first pair of electrodes being spaced apart from each other to define a detection region, the first pair of electrodes having at least one electrode capable of being coupled to a touch sensor processor. At step 1108, the first pair of electrodes is arranged to detect a first electrical characteristic within the detection region. In the exemplary embodiment, in addition to forming the touch sensor part, at step 1110, a force sensor part is formed. For forming the force sensor part, at step 1112, a piezoelectric layer is provided. At step 1114, a second pair of electrodes is disposed with both electrodes of the second pair of electrodes disposed on a same side of the piezoelectric layer, the second pair of electrodes having at least one electrode capable of being coupled to a force sensor processor. At step 1116, the piezoelectric layer is poled in a direction parallel to a plane of the second pair of electrodes disposed on the same side of the piezoelectric layer. At step 1118, the second pair of electrodes is arranged to detect a second electrical characteristic that the piezoelectric layer is capable of generating upon application of a force on a display cover layer of a vehicular display interface apparatus and transmitted to the piezoelectric layer. In some exemplary embodiments, the first pair of electrodes may be the same set of electrodes as the second pair of electrodes. In some exemplary embodiments, the piezoelectric layer may be the same layer as the touch sensor substrate. In various exemplary embodiments, the vehicular display interface sensor device described usefully mitigates issues caused by a ghost touch (not an actual touch) since force sensing can be usefully implemented on a vehicular display interface apparatus. The vehicular display interface sensor device described in various exemplary embodiments may also mitigate the issue of a user accidentally or wrongly selecting an option on a touchscreen and causing an unintended operation since force sensing can be usefully implemented on a vehicular display interface apparatus, e.g. a definite forcetouch is detected before an option is determined to be selected. FIG. 12 is a schematic flowchart for illustrating a method of forming the display stack of FIG. 3. References to components may also be made with reference to FIG. 3. It will be appreciated that, practically, there may be a plurality of pairs of electrodes. For description purposes, two pairs of electrodes are described. At step 1202, a touch sensor part is formed. Compare the touch sensor part 310. Forming the touch sensor part 310 comprises a number of following steps. At step 1204, a touch sensor substrate is provided. Compare the touch sensor substrate 312. The touch sensor substrate is provided in the form of an optically transparent and electrically insulating substrate such as, but not limited to, a 50 pm thick polyethylene terephthalate (PET) film / layer. The formation may be performed using a number of different processes such as using thin film deposition techniques. At step 1206, a TCO layer is provided to form a first pair of electrodes on the touch sensor substrate 312. Compare the first electrode 314 and the second electrode 316. The first pair of electrodes are spaced apart from each other to define a detection region. For forming the first pair of electrodes, different deposition and patterning techniques may be used on the TCO layer. For example, deposition techniques such as, but not limited to, sputtering, thermal evaporation, spray pyrolysis, pulsed laser deposition may be used. For example, patterning techniques such as, but not limited to, lithography, laser ablation, screen printing may be used. The first pair of electrodes may then have at least one electrode, e.g. the first electrode 314 and / or the second electrode 316, capable of being coupled to a touch sensor processor (not illustrated). At step 1208, a force sensor part is formed. Compare the force sensor part 318. Forming the force sensor part 318 comprises a number of following steps. At step 1210, a piezoelectric material layer is provided. Compare the piezoelectric layer 320. The piezoelectric material layer is provided in the form of an optically transparent polymer such as, but not limited to, a 100 pm thick Polyvinylidene fluoride (PVDF) film / layer. The formation may be performed using a number of different processes such as using thin film deposition techniques. At step 1212, another TCO layer is provided to form a second pair of electrodes on the piezoelectric layer 320. Compare the third electrode 322 and the fourth electrode 324. The second pair of electrodes are spaced apart from each other and disposed on a same side / surface of the piezoelectric layer 320. For forming the second pair of electrodes, different deposition and patterning techniques may be used on the another TCO layer. For example, deposition techniques such as, but not limited to, sputtering, thermal evaporation, spray pyrolysis, pulsed laser deposition may be used. For example, patterning techniques such as, but not limited to, lithography, laser ablation, screen printing may be used. The second pair of electrodes may then have at least one electrode, e.g. the third electrode 322 and / or the fourth electrode 324, capable of being coupled to a force sensor processor (not illustrated). It will be appreciated that in some exemplary embodiments, the touch sensor processor and the force sensor processor may be an integrated processor. At step 1214, the piezoelectric material layer is poled or polarized in a direction parallel to a plane of the second pair of electrodes which are disposed on the same side / surface of the piezoelectric material layer. One example method is by applying a DC or AC electric field to the second pair of electrodes. Such example method may also include heating the piezoelectric material layer to a temperature of e.g. about 80°C to about100°C. At step 1216, assembly of a display stack is performed. A display cover layer comprising a cover glass, the touch sensor part of step 1202, the force sensor part of step 1208 and a display layer comprising a display module may be assembled by a series of OCA coating and lamination steps. For the display cover layer, compare the display cover layer 302. For the display layer, compare the display layer 306. Compare also the OCA layers 330, 332, 334 and 336 of FIG. 3. It will be appreciated that the above are some example recipe steps. Other process steps may additionally or alternatively be used. Other suitable material may additionally or alternatively be used. Other layers may also be additionally or alternatively be used. For example, compare the backing substrates layers 326, 328 of FIG. 3. It will also be appreciated that the above example steps may be applied to other exemplary embodiments that include separate touch sensor and force sensor parts. FIG. 13 is a schematic flowchart for illustrating a method of using the display stack of FIG. 3. References to components may also be made with reference to FIG. 3. It will be appreciated that, practically, there may be a plurality of pairs of electrodes. For description purposes, two pairs of electrodes are described. In use, at step 1302, a powering up of a vehicular display interface apparatus (such as a touchscreen display apparatus) also powers up a touch sensor processor (such as a touch IC) and a force sensor processor (such as a force IC). It will be appreciated that in some exemplary embodiments, the touch sensor processor and the force sensor processor may be an integrated processor (such as an integrated IC chip). At step 1304, touch detection is provided. For example, the touch IC generates an analog voltage waveform into one of the electrodes belonging to the first pair of electrodes. Compare e.g. the first electrode 314 or the second electrode 316. The other electrode belonging to the first pair of electrodes is connected to an input of the touch IC. The resulting analog voltage on this electrode is monitored by the touch IC. At step 1306, when / if a user touches the vehicular display interface apparatus with one or several digits / fingers, the touch IC converts the measured analog voltage into a digital signal containing information about the absence or presence of touches including if touch is present, a location of the touch on the vehicular display interface apparatus. Such digital signal is conveyed to a central microcontroller unit / module. In some exemplary embodiments, an integrated processor may integrate the various ICs and the microcontroller unit / module. At step 1308, touch force detection / estimation is provided. When / if a user presses the vehicular display interface apparatus with one or several digits / fingers, e.g. if pressing / force is also introduced at step 1306, the piezoelectric material is deformed. Compare application of a force on the display cover layer 302 and transmitted to the piezoelectric layer 320. The force applied on the piezoelectric material generates electric charges on the electrodes belonging to the second pair of electrodes (or a variation / generation of an electric field). Compare the third electrode 322 and the fourth electrode 324. The force IC converts the electric charges into an analog voltage value that is further processed into another digital signal containing information about the applied force. This another digital signal is also conveyed to the central microcontroller unit / module. At step 1310, the central microcontroller unit / module performs touch and force information fusion for system control. At step 1312, the touch and force information conveyed to the central microcontroller unit / module are used as events, if applicable, to trigger predefined effects on the vehicular display interface apparatus. For example, such effects may include effects such as, but are not limited to, accessing a menu or powering haptic actuators (e.g. for feedback on the vehicular display interface apparatus to the user). It will be appreciated that the above are some broad example steps / processes. For example, at step 1306, a first electrical characteristic is detected within a detection region between the first pair of electrodes. For example, at step 1308, a second electrical characteristic (that the piezoelectric layer is capable of generating upon application of a force, due to the touch of the user, on a display cover layer of the vehicular display interface apparatus and transmitted to the piezoelectric layer) is detected. It will also be appreciated that other suitable processes may additionally or alternatively be used. It will also be appreciated that the above example steps may be applied to other exemplary embodiments that include separate touch sensor and force sensor parts. FIG. 14 is a schematic flowchart for illustrating a method of forming the coplanar electrode circuit arrangement of FIG. 7A. References to components are also made with reference to FIGs. 7A to 7C. It will be appreciated that, practically, there are a plurality of pairs of electrodes. For description purposes, a pair of electrodes is described. At step 1402, a touch and force sensor part is formed. Forming the touch and force sensor part comprises a number of following steps. At step 1404, a touch and force sensor substrate is provided. Compare the piezoelectric layer 704. The touch and force sensor substrate is provided in the form of an optically transparent and electrically insulating piezoelectric substrate such as, but not limited to, a 100pm thick PVDF film / layer. The formation may be performed using a number of different processes such as using thin film deposition techniques. At step 1406, a TCO layer is provided to form a pair of electrodes on the touch and force sensor substrate. The pair of electrodes are spaced apart from each other and disposed on a same side / surface of the touch and force sensor substrate. Compare the electrode pair 702 with the electrode pair 702 comprising an inner electrode 708 surrounded by an outer electrode 710 that are not electrically connected to each other. The inner electrode 708 is spaced apart from the outer electrode 710 to define a detection region. For forming the pair of electrodes, different deposition and patterning techniques may be used on the TCO layer. For example, deposition techniques such as, but not limited to, sputtering, thermal evaporation, spray pyrolysis, pulsed laser deposition may be used. For example, patterning techniques such as, but not limited to, lithography, laser ablation, screen printing may be used. The pair of electrodes may then have at least one electrode, e.g. the inner electrode 708 and / or the outer electrode 710, capable of being coupled to a touch sensor processor (not illustrated); and the pair of electrodes may then have at least one electrode, e.g. the inner electrode 708 and / or the outer electrode 710, capable of being coupled to a force sensor processor (not illustrated). Compare e.g. the pair of grid lines 712. It will be appreciated that in some exemplary embodiments, the touch sensor processor and the force sensor processor may be an integrated processor. At step 1408, the touch and force sensor substrate is poled or polarized in a direction parallel to a plane of the pair of electrodes which are disposed on the same side / surface of the touch and force sensor substrate. One example method is by applying a DC or AC electric field to the pair of electrodes. Such example method may also include heating the piezoelectric material layer to a temperature of e.g. about 80°C to about 100°C. At step 1410, assembly of a display stack is performed. A display cover layer comprising a cover glass, the touch and force sensor part of step 1402 and a display layer comprising a display module may be assembled by a series of OCA coating and lamination steps. For the display cover layer, compare the display cover layer 706. It will be appreciated that the above are some example recipe steps. Other process steps may additionally or alternatively be used. Other suitable material may additionally or alternatively be used. Other layers may also be additionally or alternatively be used. It will also be appreciated that the above example steps may be applied to other exemplary embodiments that include an integrated touch and force sensor part. FIG. 15 is a schematic flowchart for illustrating a method of using the coplanar electrode circuit arrangement of FIG. 7A. References to components are also made with reference to FIGs. 7A to 7C. It will be appreciated that, practically, there are a plurality of pairs of electrodes. For description purposes, a pair of electrodes is described. In use, at step 1502, a powering up of a vehicular display interface apparatus (such as a touchscreen display apparatus) also powers up a touch and force sensor processor (such as a touch and force IC). It will be appreciated that in some exemplary embodiments, a separate touch sensor processor and a force sensor processor may be provided. At step 1504, touch detection is provided. For example, the touch and force IC generates an analog voltage waveform into one of the electrodes belonging to the pair of electrodes. Compare e.g. the inner electrode 708 or the outer electrode 710. The other electrode belonging to the pair of electrodes is connected to an input of the touch and force IC (such input arranged for touch detection). The resulting analog voltage on this electrode is monitored by the touch and force IC. At step 1506, when / if a user touches the vehicular display interface apparatus with one or several digits / fingers, the touch and force IC converts the measured analog voltage into a digital signal containing information about the absence or presence of touches including if touch is present, a location of the touch on the vehicular display interface apparatus. Such digital signal is conveyed to a central microcontroller unit / module. In some exemplary embodiments, an integrated processor may integrate the various ICs and the microcontroller unit / module. At step 1508, touch force detection / estimation is provided. When / if a user presses the vehicular display interface apparatus with one or several digits / fingers at step 1506, after touch is detected, the touch and force IC stops producing the analog waveform driving the electrodes. The touch and force IC triggers internally a measurement of electric charges produced by deformation of the piezoelectric layer under the action of a force applied via the touch(es). Compare application of a force on the display cover layer 706 and transmitted to the piezoelectric layer 704. Compare also the inner electrode 708 and the outer electrode 710, for measurement of the electric charges. The touch and force IC converts the electric charges into an analog voltage value that is further processed into another digital signal containing information about the applied force. This another digital signal is conveyed to the central microcontroller unit / module. At step 1510, the central microcontroller unit / module performs touch and force information fusion for system control. At step 1512, the touch and force information conveyed to the central microcontroller unit / module are used as events, if applicable, to trigger predefined effects on the vehicular display interface apparatus. For example, such effects may include effects such as, but are not limited to, accessing a menu or powering haptic actuators (e.g. for feedback on the vehicular display interface apparatus to the user). It will be appreciated that the above are some broad example steps / processes. For example, at step 1506, a first electrical characteristic is detected within a detection region between the pair of electrodes. For example, at step 1508, a second electrical characteristic (that the piezoelectric layer is capable of generating upon application of a force, due to the touch of the user, on a display cover layer of the vehicular display interface apparatus and transmitted to the piezoelectric layer) is detected. Other suitable processes may additionally or alternatively be used. It will also be appreciated that the above example steps may be applied to other exemplary embodiments that include an integrated touch and force sensor part. In the description herein, the terms "coupled" or "connected" as used are intended to cover both directly connected or connected through one or more intermediate means, unless otherwise stated. The term “adjacent” as used is intended to cover both directly adjacent or indirectly adjacent with one or more intermediate layers in between two parts / components / objects and the like. In the description herein, the terms “first”, “second”, third”, “fourth” and the like are used to refer to parts / components of the respective figures. These terms are not intended to be limiting or limited to a specific part / component. Rather, the terms should be read with the respective figures and the meanings ascribed accordingly. The use of “a”, “an” or “the” is intended to mean “one or more” unless it is described specifically to the contrary. The terms “configured to (perform a task / action)”, “configured for (performing a task / action)” and the like as used in this description include being programmable, programmed, connectable, wired or otherwise constructed to have the ability to perform the task / action when arranged or installed as described herein. The terms “configured to (perform a task / action)”, “configured for (performing a task / action)” and the like are intended to cover “when in use, the task / action is performed”, e.g. specifically to and / or specifically configured to and / or specifically arranged to and / or specifically adapted to do or perform a task / action. The term "and / or", e.g., "X and / or Y" is understood to mean either "X and Y" or "X or Y" and should be taken to provide explicit support for both meanings or for either meaning. The use of “or” is intended to mean an “inclusive or,” and not an “exclusive or” unless it is described specifically to the contrary. The terms "associated with", “related to” and the like used herein when referring to two elements refers to a broad relationship between the two elements. The relationship includes, but is not limited to, a physical, a chemical or a biological relationship. For example, when element A is associated with element B, elements A and B may be directly or indirectly attached to each other or element A may contain element B or vice versa. The terms “exemplary embodiment”, “example embodiment”, “exemplary implementation”, “exemplarily” and the like used herein are intended to indicate an example of matters described in the present disclosure. Such an example may relate to one or more features defined in the claims and is not necessarily intended to emphasise a best example or any essentialness of any features. The description herein may be, in certain portions, explicitly or implicitly described as algorithms and / or functional operations that operate on data within a computer memory or an electronic circuit. These algorithmic descriptions and / or functional operations are usually used by those skilled in the information / data processing arts for efficient description. An algorithm is generally relating to a self-consistent sequence of steps leading to a desired result. The algorithmic steps can include physical manipulations of physical quantities, such as electrical, magnetic or optical signals capable of being stored, transmitted, transferred, combined, compared, and otherwise manipulated. Further, unless specifically stated otherwise, and would ordinarily be apparent from the following, a person skilled in the art will appreciate that throughout the present specification, discussions utilizing terms such as “scanning”, “calculating”, “determining”, “replacing”, “generating”, “initializing”, “outputting”, and the like, refer to action and processes of an instructing processor / computer system, or similar electronic circuit / device / component, that manipulates / processes and transforms data represented as physical quantities within the described system into other data similarly represented as physical quantities within the system or other information storage, transmission or display devices etc. The description also discloses relevant device / apparatus for performing the steps of the described methods. Such apparatus may be specifically constructed for the purposes of the methods, or may comprise a general purpose computer / processor or other device selectively activated or reconfigured by a computer program stored in a storage member. The algorithms and displays described herein are not inherently related to any particular computer or other apparatus. It is understood that general purpose devices / machines may be used in accordance with the teachings herein. Alternatively, the construction of a specialized device / apparatus to perform the method steps may be desired. In addition, it is submitted that the description also implicitly covers a computer program, in that it would be clear that the steps of the methods described herein may be put into effect by computer code. It will be appreciated that a large variety of programming languages and coding can be used to implement the teachings of the description herein. Moreover, the computer program if applicable is not limited to any particular control flow and can use different control flows without departing from the scope of the invention. Furthermore, one or more of the steps of the computer program if applicable may be performed in parallel and / or sequentially. Such a computer program if applicable may be stored on any computer readable medium. The computer readable medium may include storage devices such as magnetic or optical disks, memory chips, or other storage devices suitable for interfacing with a suitable reader / general purpose computer. In such instances, the computer readable storage medium is non-transitory. Such storage medium also covers all computer-readable media e.g. medium that stores data only for short periods of time and / or only in the presence of power, such as register memory, processor cache and Random Access Memory (RAM) and the like. The computer readable medium may even include a wired medium such as exemplified in the Internet system, or wireless medium such as exemplified in Bluetooth technology. The computer readable medium may be, for example, cloud storage in the Internet or within an intranet. The computer program when loaded and executed on a suitable reader effectively results in an apparatus that can implement the steps of the described methods, e.g. in a physical embodiment. The computer readable medium is intended to be transferable and is reproducible in that the computer program if applicable is reproducible.. Additionally, when describing some embodiments, the disclosure may have disclosed a method and / or process as a particular sequence of steps. However, unless otherwise required, it will be appreciated the method or process should not be limited to the particular sequence of steps disclosed. Other sequences of steps may be possible. The particular order of the steps disclosed herein should not be construed as undue limitations. Unless otherwise required, a method and / or process disclosed herein should not be limited to the steps being carried out in the order written. The sequence of steps may be varied and still remain within the scope of the disclosure. Further, in the description herein, the word “substantially” whenever used is understood to include, but not restricted to, "entirely" or “completely” and the like. In addition, terms such as "comprising", "comprise", and the like whenever used, are intended to be non-restricting descriptive language in that they broadly include elements / components recited after such terms, in addition to other components not explicitly recited. For an example, when “comprising” is used, reference to a “one” feature is also intended to be a reference to “at least one” of that feature. Terms such as “consisting”, “consist”, and the like, may, in the appropriate context, be considered as a subset of terms such as "comprising", "comprise", and the like. Therefore, in embodiments disclosed herein using the terms such as "comprising", "comprise", and the like, it will be appreciated that these embodiments provide teaching for corresponding embodiments using terms such as “consisting”, “consist”, and the like. Further, terms such as "about", "approximately" and the like whenever used, typically means a reasonable variation, for example a variation of + / - 5% of the disclosed value, or a variance of 4% of the disclosed value, or a variance of 3% of the disclosed value, a variance of 2% of the disclosed value or a variance of 1% of the disclosed value. Furthermore, in the description herein, certain values may be disclosed in a range. The values showing the end points of a range are intended to illustrate a preferred range. Whenever a range has been described, it is intended that the range covers and teaches all possible sub-ranges as well as individual numerical values within that range. That is, the end points of a range should not be interpreted as inflexible limitations. For example, a description of a range of 1 % to 5% is intended to have specifically disclosed sub-ranges 1% to 2%, 1% to 3%, 1% to 4%, 2% to 3% etc., as well as individually, values within that range such as 1%, 2%, 3%, 4% and 5%. It is to be appreciated that the individual numerical values within the range also include integers, fractions and decimals. Furthermore, whenever a range has been described, it is also intended that the range covers and teaches values of up to 2 additional decimal places or significant figures (where appropriate) from the shown numerical end points. For example, a description of a range of 1 % to 5% is intended to have specifically disclosed the ranges 1.00% to 5.00% and also 1.0% to 5.0% and all their intermediate values (such as 1.01%, 1.02% ... 4.98%, 4.99%, 5.00% and 1.1%, 1.2% ... 4.8%, 4.9%, 5.0% etc.,) spanning the ranges. The intention of the above specific disclosure is applicable to any depth / breadth of a range. It will be appreciated by a person skilled in the art that other variations and / or modifications may be made to the specific embodiments without departing from the scope of the claimed invention as broadly described. For example, in the description herein, features of different exemplary embodiments may be mixed, combined, interchanged, incorporated, adopted, modified, included etc. or the like across different exemplary embodiments. For example, exemplary embodiments are not necessarily mutually exclusive as some may be combined with one or more embodiments to form new exemplary embodiments. Furthermore, it will be appreciated that while the present disclosure provides embodiments having one or more of the features / characteristics discussed herein, one or more of these features / characteristics may also be disclaimed in other alternative embodiments and the present disclosure provides support for such disclaimers and these associated alternative embodiments. The present embodiments are, therefore, to be considered in all respects to be illustrative and not restrictive.

Claims

1. A vehicular display interface sensor device, the device comprising,a touch sensor part comprisinga touch sensor substrate;a first pair of electrodes disposed on the touch sensor substrate, the first pair of electrodes being spaced apart from each other to define a detection region, the first pair of electrodes having at least one electrode capable of being coupled to a touch sensor processor and the first pair of electrodes is arranged to detect a first electrical characteristic within the detection region;a force sensor part comprisinga piezoelectric layer;a second pair of electrodes with both electrodes of the second pair of electrodes disposed on a same side of the piezoelectric layer, the second pair of electrodes having at least one electrode capable of being coupled to a force sensor processor;wherein the piezoelectric layer is poled in a direction parallel to a plane of the second pair of electrodes disposed on the same side of the piezoelectric layer; andwherein the second pair of electrodes is arranged to detect a second electrical characteristic that the piezoelectric layer is capable of generating upon application of a force on a display cover layer of a vehicular display interface apparatus and transmitted to the piezoelectric layer.

2. The vehicular display interface sensor device as claimed in claim 1, wherein the touch sensor part is provided as a part of a display layer.

3. The vehicular display interface sensor device as claimed in claims 1 or 2, wherein the touch sensor part and the force sensor part are provided within a stack of layers.

4. The vehicular display interface sensor device as claimed in claim 1, wherein the first pair of electrodes is provided as the second pair of electrodes.

5. The vehicular display interface sensor device as claimed in claim 4, wherein the touch sensor substrate is provided as the piezoelectric layer.

6. The vehicular display interface sensor device as claimed in claims 4 or 5, wherein the touch sensor substrate is provided as a part of the display cover layer of a vehicular display interface apparatus.

7. The vehicular display interface sensor device as claimed in claim 4, wherein the second pair of electrodes comprises a third electrode and a fourth electrode, the third electrode capable of being coupled to a first grid line and the fourth electrode capable of being coupled to a second grid line;further wherein the fourth electrode is provided substantially surrounding the third electrode on the same side of the piezoelectric layer and the fourth electrode comprises a grid line gap on the same side of the piezoelectric layer for allowing passage of the first grid line.

8. The vehicular display interface sensor device as claimed in claim 4, wherein the second pair of electrodes comprises a third electrode and a fourth electrode, the third electrode capable of being coupled to a third grid line and the fourth electrode capable of being coupled to a fourth grid line;further wherein the fourth electrode is provided substantially surrounding the third electrode on the same side of the piezoelectric layer; andfurther wherein the fourth electrode is coated with a dielectric separation material at least in an area of passage of the third grid line, the dielectric separation material being provided as a bridge layer for the third grid line to be overlaid over the fourth electrode.

9. The vehicular display interface sensor device as claimed in claims 7 or 8, wherein the second pair of electrodes are provided on the same side of the piezoelectric layer as an interdigitated electrode pattern.

10. A method of forming a vehicular display interface sensor device, the method comprising,forming a touch sensor part comprisingproviding a touch sensor substrate;disposing a first pair of electrodes on the touch sensor substrate, the first pair of electrodes being spaced apart from each other to define a detection region, the first pair of electrodes having at least one electrode capable of being coupled to a touch sensor processor;arranging the first pair of electrodes to detect a first electrical characteristic within the detection region;forming a force sensor part comprisingproviding a piezoelectric layer;disposing a second pair of electrodes with both electrodes of the second pair of electrodes disposed on a same side of the piezoelectric layer, the second pair of electrodes having at least one electrode capable of being coupled to a force sensor processor;poling the piezoelectric layer in a direction parallel to a plane of the second pair of electrodes disposed on the same side of the piezoelectric layer; andarranging the second pair of electrodes to detect a second electrical characteristic that the piezoelectric layer is capable of generating upon application of a force on a display cover layer of a vehicular display interface apparatus and transmitted to the piezoelectric layer.

11. The method as claimed in claim 10, further comprising forming the touch sensor as a part of a display layer.

12. The method as claimed in claims 10 or 11, further comprising providing the touch sensor part and the force sensor part within a stack of layers.

13. The method as claimed in claim 10, further comprising disposing the first pair of electrodes as the second pair of electrodes.

14. The method as claimed in claim 13, further comprising providing the piezoelectric layer as the touch sensor substrate.

15. The method as claimed in claims 13 or 14, further comprising providing the touch sensor substrate as a part of a display cover layer of the vehicular display interface sensor device.

16. The method as claimed in claim 13, wherein the second pair of electrodes comprises a third electrode and a fourth electrode, the third electrode capable of being coupled to a first grid line and the fourth electrode capable of being coupled to a second grid line; andfurther comprising providing the fourth electrode substantially surrounding the third electrode on the same side of the piezoelectric layer and providing the fourth electrode to comprise a grid line gap on the same side of the piezoelectric layer for allowing passage of the first grid line.

17. The method as claimed in claim 13, wherein the second pair of electrodes comprises a third electrode and a fourth electrode, the third electrode capable of being coupled to a third grid line and the fourth electrode capable of being coupled to a fourth grid line; andfurther comprising providing the fourth electrode substantially surrounding the third electrode on the same side of the piezoelectric layer; andcoating the fourth electrode with a dielectric separation material at least in an area of passage of the third grid line, the dielectric separation material being provided as a bridge layer for the third grid line to be overlaid over the fourth electrode.

18. The method as claimed in claims 16 or 17, further comprising providing the second pair of electrodes on the same side of the piezoelectric layer as an interdigitated electrode pattern.

19. A vehicular display interface apparatus, the apparatus comprisinga display cover layer to accept a user interaction with the apparatus;a display layer to generate a graphical user interface display to a user;a touch sensor processor for sensing a user touch via detection of a first electrical characteristic;a force sensor processor for sensing a user force on the display cover layer;a vehicular display interface sensor device comprising,a touch sensor part comprisinga touch sensor substrate;a first pair of electrodes disposed on the touch sensor substrate, the first pair of electrodes being spaced apart from each other to define a detection region, the first pair of electrodes having at least one electrode coupled to the touch sensor processor and the first pair of electrodes is arranged to detect the first electrical characteristic within the detection region;a force sensor part comprisinga piezoelectric layer;a second pair of electrodes with both electrodes of the second pair of electrodes disposed on a same side of the piezoelectric layer, the second pair of electrodes having at least one electrode coupled to the force sensor processor;wherein the piezoelectric layer is poled in a direction parallel to a plane of the second pair of electrodes disposed on the same side of the piezoelectric layer; andwherein the second pair of electrodes is arranged to detect a second electrical characteristic that the piezoelectric layer is capable of generating upon application of a force on the display cover layer of the vehicular display interface apparatus and transmitted to the piezoelectric layer.

20. The vehicular display interface apparatus as claimed in claim 19, wherein the touch sensor processor and the force sensor processor are provided as a single processor.

21. The vehicular display interface apparatus as claimed in claims 19 or 20, wherein the vehicular display interface sensor device is as claimed in any one of claims 2 to 9.

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