Contact sensing system, multi-sensor device and vehicle control device

Abstract

The invention discloses a contact sensing system, a multi-sensor device, and a vehicle control device. The contact sensing system includes: a frame; an auxiliary layer surrounding the frame; a capacitive contact sensor layer surrounding the auxiliary layer; the soft material layer is positioned between the capacitive contact sensor layer and the auxiliary layer and surrounds the auxiliary layer; the flat material layer is located between the capacitive contact sensor layer and the soft material layer or located between the auxiliary layer and the soft material layer, and the flat material layer increases the flatness of the soft material layer; wherein if the auxiliary layer is located below the soft material layer, the capacitive contact sensor layer is located above the soft material layer; wherein the capacitive contact sensor layer comprises a first driving electrode and a first sensing electrode; wherein the auxiliary layer includes an electrode. Similar configurations may be used in multi-sensor devices and vehicle control devices. Therefore, the assembling and manufacturing processes can be simplified.

Description

Technical Field

[0001] The present invention relates to a contact sensing system, a multi-sensor device and a vehicle control device, and more particularly to a contact sensing system, a multi-sensor device and a vehicle control device which can use a soft material layer to simplify assembly or manufacturing steps. Background Art

[0002] A conventional steering wheel may have a Hand Off Detection (HOD) function, which can prevent the driver from falling asleep while driving or assist the driver in autonomous driving. The sensor in the contact sensing device of the steering wheel is usually set on a non-soft material, such as conductive fabric. However, in this structure, due to the poor softness of the contact sensing device, it is difficult to assemble or manufacture a contact sensing device suitable for the steering wheel. Summary of the invention

[0003] An object of the present invention is to disclose a contact sensing system that can be easily adapted to the size and shape of a vehicle control device.

[0004] Another object of the present invention is to disclose a multi-sensor device that can more easily adapt to the size and shape of a vehicle control device.

[0005] One embodiment of the present invention discloses a touch sensing system, comprising: a frame; an auxiliary layer surrounding the frame; a capacitive touch sensor layer surrounding the auxiliary layer; a soft material layer located between the capacitive touch sensor layer and the auxiliary layer and surrounding the auxiliary layer; and a flat material layer located between the capacitive touch sensor layer and the soft material layer, or between the auxiliary layer and the soft material layer, wherein the flat material layer increases the flatness of the soft material layer; wherein if the auxiliary layer is located below the soft material layer, the capacitive touch sensor layer is located above the soft material layer; wherein the capacitive touch sensor layer includes a first driving electrode and a first sensing electrode; wherein the auxiliary layer includes an electrode.

[0006] Another embodiment of the present invention discloses a multi-sensor device, characterized in that it includes: a frame; a first sensor layer surrounding the frame; a second sensor layer surrounding the first sensor layer; a soft material layer located between the first sensor layer and the second sensor layer and surrounding the first sensor layer; and a flat material layer located between the second sensor layer and the soft material layer, or between the first sensor layer and the soft material layer, wherein the flat material layer increases the flatness of the soft material layer; wherein if the first sensor layer is located below the soft material layer, the second sensor layer is located above the soft material layer; wherein the first sensor layer includes a first driving electrode and a first sensing electrode; wherein the second sensor layer includes a second driving electrode and a second sensing electrode.

[0007] Another embodiment of the present invention discloses a transportation vehicle control device, characterized in that it includes: a frame; a heating layer surrounding the frame; a first layer surrounding the heating layer; a soft material layer located between the heating layer and the first layer and surrounding the heating layer; and a flat material layer located between the first layer and the soft material layer, or between the heating layer and the soft material layer, wherein the flat material layer increases the flatness of the soft material layer; wherein if the heating layer is located below the soft material layer, the first layer is located above the soft material layer; wherein the first layer includes a first electrode; wherein the heating layer includes a heating electrode.

[0008] According to the aforementioned embodiment, since the sensor layer is disposed on the soft material layer, the contact sensing device can more easily match the size or shape of the steering wheel. In addition, since the driving circuit of the heating circuit generates the driving current without turning on and off the switch, the noise generated by the heating circuit can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic diagram of a steering wheel according to an embodiment of the present invention is shown.

[0010] Figure 2 Draws Figure 1 A schematic diagram of the detailed structure of the contact sensing device shown.

[0011] Figure 3 A schematic diagram of a transportation vehicle control device according to an embodiment of the present invention is shown.

[0012] Figure 4 Draws Figure 3 A schematic diagram of the detailed structure of the contact sensing device shown.

[0013] Figure 5 and Figure 6 Schematic diagrams showing structures of electrodes of a sensing layer or an auxiliary layer according to different embodiments of the present invention are shown.

[0014] Figure 7 To illustrate an embodiment of the present invention, Figure 5 and Figure 6 Schematic diagram of the sensing area.

[0015] Figure 8 FIG. 1 is a schematic diagram of a practical example of a sensing pad according to an embodiment of the present invention. The sensing pad includes Figure 5 and Figure 6 The sensing area and electrodes are shown.

[0016] Fig. 9 , Fig.10 and Fig.11 Schematic diagrams of structures for fixing a touch sensing IC to a sensing layer according to different embodiments of the present invention are shown.

[0017] Fig.12 for Fig.11 Cross-sectional view of an embodiment.

[0018] Fig.13 FIG. 4 is a circuit diagram of a heating circuit according to an embodiment of the present invention.

[0019] The reference numerals are described as follows:

[0020] 100 Steering Wheel

[0021] 101 Framework

[0022] 103 Covering material

[0023] 201 Capacitance Calculation Circuit

[0024] 203 Processing Circuit

[0025] 700_a, 700_b, 700_c sensing pad

[0026] 703 Collection Department

[0027] 801,803 sensor pad

[0028] 901 Base Material

[0029] 1001 Gold Finger PCB

[0030] 1201 welding layer

[0031] 1203 Support layer

[0032] 1205 Covering

[0033] 1300 Heating circuit

[0034] 1301 Heating electrode

[0035] 1303 Constant Voltage Source

[0036] 1305 drive circuit

[0037] 1307 Amplifier

[0038] 1309 Variable Resistor

[0039] AL Auxiliary Layer

[0040] CJ_1, CJ_2 connection components

[0041] G_1, G_2 Gold Finger

[0042] Sd_1 first side

[0043] Sd_2 Second side

[0044] EL Electrode

[0045] EL_d1 first driving electrode

[0046] EL_s1 first sensing electrode

[0047] HL Heating Layer

[0048] TS contact sensing device

[0049] X direction

[0050] PL_1, PL_2 non-conductive layer

[0051] SL_1 First sensor layer

[0052] FILL_1, FILL_2 flat material layers

[0053] FLEL soft material layer

[0054] R1a, R2a, R3a, R4a, R1 electrode area

[0055] R2, R3, R4, R5, R6, R7, R8 electrode area

[0056] S0, S2, S4, S6, S8, S10, S12, S14 sensing area

[0057] S1, S3, S5, S7, S9, S11, S13, S15 sensing area DETAILED DESCRIPTION

[0058] The present invention will be described below with multiple embodiments. Please note that the "first", "second" and similar descriptions in the following description are only used to define different elements, parameters, data, signals or steps. They are not used to limit their order. For example, the first device and the second device can be different devices with the same structure.

[0059] Figure 1 A schematic diagram of a steering wheel 100 according to an embodiment of the present invention is shown. Figure 1 The following figure is along Figure 1 The X-direction cross-section of the above figure. Figure 1 As shown in the above figure, the steering wheel 100 includes a frame 101 and a covering material 103. The covering material 103 can be leather or plastic, and is the outermost layer of the steering wheel 100.

[0060] like Figure 1 As shown in the figure below, in addition to the frame 101 and the covering material 103, the steering wheel 100 also includes a contact sensing device TS and a heating layer HL. The heating layer HL surrounds the frame 101. The contact sensing device TS surrounds the frame 101 and the heating layer HL, and is used to sense contact provided by the user. For example, the contact sensing device TS senses contact provided by the user's hand. In such an embodiment, the steering wheel 100 can be regarded as a contact sensing system that can be used as a HOD device. Please note that the contact referred to here can refer to direct contact or indirect contact. Direct contact means that the user actually touches the steering wheel 100. In addition, indirect contact means that the user does not actually touch the steering wheel 100, but is very close to the steering wheel 100. Further, in one embodiment, if the user touches the steering wheel 100, it means that the user touches the covering material 103.

[0061] The touch sensing device TS may have various structures. Figure 2 Draws Figure 1 Schematic diagram of the detailed structure of the contact sensing device shown in FIG. Figure 2 As shown in the above figure, the touch sensing device TS includes a non-conductive layer PL_1, a first sensor layer SL_1, a flat material layer FILL_1, and a soft material layer FLEL. Figure 2 In the embodiment of FIG. 1 , the non-conductive layer PL_1 contacts the covering material 103, and the soft material layer FLEL contacts the heating layer HL. The relationship between the layers is shown in detail in FIG. Figure 1 and Figure 2 , I will not go into details here. Please note that Figure 2 and later Figure 4 The structure shown may be used in devices other than the touch sensing device TS. In such an embodiment, the first sensor layer SL_1 is the first layer not used to sense contact provided by a user.

[0062] The non-conductive layer PL_1 is used to protect other layers of the touch sensing device TS. In one embodiment, the material of the non-conductive layer is insulating ink or protective ink. However, in another embodiment, the non-conductive layer PL_1 may be removed. Figure 2 In an embodiment, the first sensor layer SL_1 is a capacitive touch sensor layer, which includes at least one first drive electrode and at least one first sensing electrode. The first drive electrode and the first sensing electrode can be the same electrode or different electrodes. In one embodiment, the first drive electrode and the first sensing electrode are made of conductive silver paste or printed with conductive ink. In addition, in one embodiment, the material of the soft material layer FLEL is elastic fabric or silicone. Elastic fabric or silicone is softer than the conductive fabric used in the existing touch sensing device, so it can be more easily fitted to the size or shape of the frame 101. The flat material layer FILL_1 is used to flatten the soft material layer FLEL. In one embodiment, the flat material layer FILL_1 is used to fill at least one hole or at least one crack of the soft material layer FLEX. In such an embodiment, the flat material layer FILL_1 can be made of polyurethane. However, if the soft material layer FLEX is made of a material without cracks and holes or with only a small number of cracks and holes, the flat material layer FILL_1 can be removed. In another embodiment, the planar material layer FILL_1 is an independent layer adhered to the soft material layer FLEX to planarize the soft material layer FLEX instead of filling holes or cracks in the soft material layer FLEX.

[0063] As described above, the first sensor layer SL_1 may be a capacitive touch sensor layer, which includes at least one first driving electrode and at least one first sensing electrode. In one embodiment, the touch sensing device TS further includes a capacitance calculation circuit 201, and the vehicle using the steering wheel 100 includes a processing circuit 203, such as Figure 2 As shown. The capacitance calculation circuit 201 generates a driving signal to the first driving electrode of the first sensor layer SL_1, and senses the capacitance information (i.e., the contact sensing signal) from / through the first sensing electrode. The processing circuit 203 can generate a control instruction based on the contact sensing signal. The control instruction can be used to control the device of the transportation vehicle using the steering wheel 100. If the user touches the steering wheel 100, the capacitance of the first sensing electrode will change. Therefore, the processing circuit 203 is used to generate instructions based on whether the steering wheel 100 is touched. If the contact sensing device TS is used for the HOD function, the processing circuit 203 can generate a control instruction to turn on the alarm if the user's hand does not touch the steering wheel 100 within a predetermined time when the transportation vehicle is moving.

[0064] The structure of the contact sensing device TS is not limited to Figure 1 and Figure 2 The structure shown. Figure 3A schematic diagram of a transportation vehicle control device according to an embodiment of the present invention is shown. Figure 3 In the embodiment of FIG. 1 , the heating layer HL is integrated into the contact sensing device TS, so that Figure 3 Not shown in .

[0065] See also Figure 4 , which is Figure 3 A detailed structural diagram of the contact sensing device is shown. Figure 4 The contact sensing device TS is Figure 2 In addition to the non-conductive layer PL_1, the first sensor layer SL_1, the flat material layer FILL_1, and the soft material layer FLEL shown, a non-conductive layer PL_2, an auxiliary layer AL, and a flat material layer FILL_2 are also included. In this structure, the auxiliary layer AL surrounds the frame 101. The soft material layer FLEL is located between the first sensor layer SL_1 and the auxiliary layer AL, and surrounds the auxiliary layer AL. The flat material layer FILL_2 is located between the auxiliary layer AL and the soft material layer FLEL. In addition, when the auxiliary layer AL is located below the soft material layer FLEL, the first sensor layer SL_1 is located above the soft material layer FLEL. In other words, the first sensor layer SL_1 and the auxiliary layer AL face opposite sides of the soft material layer FLEL, respectively.

[0066] The details of the non-conductive layer PL_1, the first sensor layer SL_1, the flattened material layer FILL_1 and the soft material layer FLEL are shown in FIG. Figure 1 In addition, the non-conductive layer PL_2 and the planar material layer FILL_2 may have the same characteristics as the non-conductive layer PL_1 and the planar material layer FILL_1. Therefore, they will not be described in detail here.

[0067] In one embodiment, the auxiliary layer AL includes a ground layer or a heating layer. In one embodiment, the auxiliary layer AL has the functions of both a ground layer and a heating layer. In this case, the heating layer can act according to the DC value of the received signal, and the ground layer can act according to the AC value of the received signal. In this case, the auxiliary layer AL may include at least one electrode made of graphene. The temperature stability of graphene is higher than the temperature stability of the conductive silver paste used to manufacture the first sensor layer SL_1. Therefore, the electrode of the auxiliary layer AL can be used as a heating layer or as a ground layer close to the heating layer. In one embodiment, the ground layer is coupled to a predetermined voltage level to serve as an active shielding layer of the first sensor layer SL_1. In one embodiment, the predetermined voltage level is the ground voltage level of the entire vehicle using the steering wheel 100. In addition, in one embodiment, the predetermined voltage level is adjustable. For example, the predetermined voltage level can be adjusted manually. For another example, the predetermined voltage level can be automatically adjusted according to the signal noise amplitude or signal period of the signal sensed by the sensor.

[0068] In one embodiment, the auxiliary layer AL is replaced by a second sensor layer, which includes at least one second drive electrode and at least one second sensing electrode. The second drive electrode and the second sensing electrode can be the same electrode or different electrodes. For example, the second sensor layer can be a capacitive pressure sensor layer. In this case, the steering wheel 100 can not only sense the user's contact, but also sense the pressure provided by the user. The details of pressure sensing are described in the related patent application with application number US17 / 857,194, so its description is omitted here. In this case, the steering wheel 100 can be regarded as a multi-sensor device.

[0069] The configuration of the first sensing electrode, the first driving electrode, the second sensing electrode, the second driving electrode and the like in the above embodiments may be changed according to different requirements. Figure 5 and Figure 6 Schematic diagrams showing structures of electrodes of a sensing layer or an auxiliary layer according to different embodiments of the present invention are shown. Figure 5 and Figure 6 The electrodes in the embodiment are all self-capacitance structures. In this case, the first driving electrode and the first sensing electrode are the same electrode, and the second driving electrode and the second sensing electrode are the same electrode. Figure 5 The electrode in the embodiment is divided into four electrode regions R1a, R2a, R3a and R4a. In addition, Figure 6 The electrodes in the embodiment are divided into eight electrode areas R1, R2, R3, R4, R5, R6, R7 and R8. Through the multiple electrode areas, the movement of the user's hand on the steering wheel 100 can be sensed. Please also note that the configuration of the electrodes is not limited to Figure 5 and Figure 6 The electrode regions R1a, R2a, R3a, R4a, R1, R2, R3, R4, R5 can also be regarded as sensing regions. The electrode structure of the auxiliary layer AL can be Figure 5 and Figure 6 The structures shown may be the same or different.

[0070] Apart from Figure 5 and Figure 6 In addition to the self-capacitive structure shown, the electrodes of the capacitive pressure sensing layer PS and the capacitive touch sensing layer TS may also have a mutual capacitance structure. In this type of example, the first drive electrode and the first sensing electrode are different electrodes, and the second drive electrode and the second sensing electrode are different electrodes. The details of the self-capacitive structure and the mutual capacitance structure are well known to those skilled in the art. For example, the U.S. Patent No. US 9684418 clearly describes the structures of the self-capacitive structure and the mutual capacitance structure, which will not be repeated here.

[0071] Figure 7 According to an embodiment of the present invention, Figure 5 and Figure 6 Schematic diagram of the sensing area shown. Figure 7 As shown, in configuration 1 and configuration 2, the sensing pads 700_a and 700_b include sensing regions S1-S7 and sensing regions S1-S15 configured in a single-line manner, respectively. In addition, in configuration 3, the sensing pad 700_c includes sensing regions S1-S15 configured in a double-line manner. In addition to the sensing regions, Figure 7 The sensing pads 700_a, 700_b, 700_c in the embodiment further include a collecting portion 703 for collecting the signal lines of the electrodes in the sensing area.

[0072] Figure 7 The sensing areas shown can be used for touch sensing or pressure sensing. If all the sensing areas in the sensing pad are used for touch sensing, the sensing pad is the above-mentioned capacitive touch sensing layer TS. For example, if the sensing areas S1-S7 of the sensing pad 700_a are all used for touch sensing, the sensing pad 700_a is the above-mentioned capacitive touch sensing layer TS. Similarly, if the sensing areas S1-S15 of the sensing pad 700_b are all used for pressure sensing, the sensing pad 700_b is the above-mentioned capacitive pressure sensing layer PS. In addition, if some of the sensing areas in a single sensing pad are used for touch sensing, and other sensing areas in the same sensing pad are used for pressure sensing, the sensing pad is the above-mentioned integration layer CL. For example, if the sensing regions S0, S2, S4, S6, S8, S10, S12, S14 of the sensing pad 700_c are used for touch sensing and the sensing regions S1, S3, S5, S7, S9, S11, S13, S15 of the sensing pad 700_c are used for pressure sensing, the sensing pad 700_c is the above-mentioned integration layer CL. Please also understand that the configuration of the sensing regions is not limited to Figure 7 The configuration of the sensing area can be set according to different requirements. For example, the sensing area can be set according to the size of the steering wheel or the manufacturing process of the sensing pad.

[0073] Figure 8 FIG. 1 is a schematic diagram of a practical example of a sensing pad according to an embodiment of the present invention. The sensing pad includes Figure 5 and Figure 6 The sensing area and electrodes are shown. Figure 8 In FIG. 8 , the sensor pad 801 includes a plurality of sensing regions (only two sensing regions S0 and S1 are shown), and each sensing region includes the above-mentioned electrode EL. In addition, the sensor pad 803 includes only one sensing region S0.

[0074] In one embodiment, the capacitance calculation circuit 201 is implemented by a touch sensing IC, which can be Figure 8The collecting portion 703 in the contact sensing IC is coupled (ie, electrically connected) to the first sensing electrode and the first driving electrode. However, the connection between the first sensing electrode, the first driving electrode, and the contact sensing IC is not limited to this structure.

[0075] Fig. 9 , Fig.10 and Fig.11 A schematic diagram of fixing a touch sensing IC to a sensing layer according to different embodiments of the present invention is shown. Fig. 9 In one embodiment, the contact sensing IC TIC is coupled to the first driving electrode EL_D1 and the first sensing electrode EL_S1 (only one driving electrode and one sensing electrode are shown for illustration). In addition, the substrate 901 is located between the contact sensing IC TIC and the soft material layer FLEL. In other words, the substrate 901 is located between the contact sensing IC TIC and the first sensor layer SL_1. In one embodiment, the contact sensing IC TIC is first disposed on the substrate 901, and then coupled to the first driving electrode EL_D1 and the first sensing electrode EL_S1 through the substrate 901.

[0076] In addition, a connecting element (only two connecting elements CJ_1 and CJ_2 are shown for illustration) is disclosed to pass through the substrate 901 and fix the substrate 901 to the soft material layer FLEL. In this way, it is not necessary to collect the signal lines of the first driving electrode EL_D1 and the first sensing electrode EL_S1 through the collecting portion 703. In this way, the assembly of the contact sensing device TS and the soft material layer FLEL, or the assembly of the contact sensing device TS and the first sensor layer, can be simplified.

[0077] In one embodiment, the connecting elements CJ_1 and CJ_2 are rivets, and the substrate 901 is a FPC (Flexible Printed Circuit). In this case, a wire or a conductive material may be provided to couple the touch sensing IC TIC with the first driving electrode EL_D1 and the first sensing electrode EL_S1 through the connecting elements CJ_1 and CJ_2. However, the connecting elements CJ_1 and CJ_2 and the substrate 901 are not limited to this example.

[0078] In another embodiment, the substrate 901 is a gold finger printed circuit board 1001, such as Fig.10As shown. In this case, the gold finger PCB 1001 can be bonded to the first sensor layer SL_1 or the soft material layer FLEE and fixed by connecting elements CJ_1 and CJ_2. Moreover, the first driving electrode EL_D1 and the first sensing electrode EL_S1 can be coupled to the gold fingers (only two gold fingers G_1 and G_2 are shown for illustration). In addition, the contact sensing IC can be set on the gold finger PCB 1001 and connected to the gold fingers G_1 and G_2 by welding or hot pressing tin welding.

[0079] Fig. 9 and Fig.10 Embodiments may use other materials to strengthen the joint between the contact sensing IC and the first sensor layer SL_1 or between the contact sensing IC and the soft material layer FLEL. For example, UV-curable resin or epoxy glue may be used between the substrate 901 and the first sensor layer SL_1 or between the substrate 901 and the soft material layer FLEL to strengthen the joint between the contact sensing IC and the first sensor layer SL_1 or between the contact sensing IC and the soft material layer FLEL.

[0080] In one embodiment, the contact sensing IC TIC is soldered to face the first side of the soft material layer. In this case, the support layer for supporting the contact sensing IC TIC is the second side facing the soft material layer, such as Fig.11 and Fig.12 The embodiment shown in FIG. Fig.11 In the example, the sensor pad 801 is used as an example. Fig.12 yes Fig.11 The cross-sectional view of the structure shown. Fig.11 At the same time reference Fig.12 , in order to more clearly understand the concept of the present invention.

[0081] like Fig.11 and Fig.12 As shown, the contact sensing IC TIC is disposed on the first sensor layer SL_1 through the solder layer 1201 to face the first side Sd_1 of the soft material layer FLEL. In addition, the support layer 1203 is disposed on the second side Sd_2 of the soft material layer FLEL. Please also note that if the above-mentioned flat material layer FILL_1 is disposed between the support layer 1203 and the soft material layer FLEL, the support layer 1203 is disposed on the flat material layer FILL_1 to face the second side of the soft material layer FLEL. In addition, if Fig.11 and Fig.12 The structure shown has Figure 4In the structure shown, the support layer 1203 may be located between the flat material layer FILL_2 and the soft material layer FLEL. In one embodiment, a cover 1205 may be provided to protect the touch sensing IC TIC and the solder layer 1201. The cover 1205 may be vinyl or any other material that can provide protection.

[0082] Fig. 9 , Fig.10 , Fig.11 and Fig.12 In the embodiments, the capacitive touch sensor layer is used as an example for explanation. However, the IC for the capacitive pressure sensor layer (second sensor layer) or the auxiliary layer AL may also be of the type Fig. 9 , Fig.10 , Fig.11 and Fig.12 In addition, Fig. 9 , Fig.10 , Fig.11 and Fig.12 In the embodiment of the present invention, the contact sensing IC may be set on the soft material layer FLEL. However, if the soft material layer FLEL is covered by the flat material layer FILL_1 or FILL_2, "the contact sensing IC is set on the soft material layer FLEL" may represent "the contact sensing IC is set on the flat material layer FILL_1 or FILL_2".

[0083] As mentioned above, Figure 4 The auxiliary layer AL may include a heating layer. In such an example, the heating layer may also include a heating circuit for heating the steering wheel 100. However, the existing heating circuit usually uses a PWM (Pulse-Width Modulation) signal to turn on and off the switch. In this case, the turning on / off of the switch may generate noise, thereby affecting the accuracy of contact sensing or pressure sensing. Therefore, the present invention also discloses a heating circuit that generates less noise.

[0084] Fig.13 FIG. 1 is a circuit diagram of a heating circuit 1300 according to an embodiment of the present invention. Fig.13 As shown, the heating circuit 1300 includes a heating electrode 1301, a constant voltage source 1303 and a driving circuit 1305. The heating electrode 1301 can be an electrode of the auxiliary layer AL. The constant voltage source 1303 is used to provide a constant voltage. The driving circuit 1305 is used to generate a driving current Ih to the heating electrode 1301 according to the constant voltage.

[0085] In one embodiment, the driving circuit 1305 generates the driving current without turning on and off the switch. For example, the driving circuit 1305 can adjust the resistance value of the variable resistor or change the gain of the amplifier to change the current value of the driving current Ih. Fig.13 As shown, the driving circuit 1305 includes an amplifier 1307 and a variable resistor 1309. The driving circuit 1305 can adjust the resistance of the variable resistor 1309 or change the gain of the amplifier 1307 to change the current value of the driving current Ih. This can reduce the noise generated when the switch is turned on / off. Please also note that the structure of the amplifier and the variable resistor is not limited to Fig.13 The structure shown.

[0086] According to the aforementioned embodiment, since the sensor layer is disposed on the soft material layer, the contact sensing device can more easily match the size or shape of the steering wheel. In addition, since the driving circuit of the heating circuit generates the driving current without turning on and off the switch, the noise generated by the heating circuit can be reduced.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A contact sensing system, characterized in that: include: frame; Auxiliary layers, surrounding the frame; a capacitive touch sensor layer surrounding the auxiliary layer; A soft material layer is located between the capacitive touch sensor layer and the auxiliary layer and surrounds the auxiliary layer; as well as A flat material layer, located between the capacitive touch sensor layer and the soft material layer, or between the auxiliary layer and the soft material layer, wherein the flat material layer increases the flatness of the soft material layer; If the auxiliary layer is located below the soft material layer, the capacitive touch sensor layer is located above the soft material layer; Wherein the capacitive touch sensor layer comprises a first driving electrode and a first sensing electrode; The auxiliary layer includes an electrode.

2. The contact sensing system of claim 1, wherein: The auxiliary layer further includes a ground layer or a heating layer.

3. The touch sensing system of claim 1, wherein: The flat layer is made of polyurethane.

4. The touch sensing system of claim 1, wherein: Further including: A contact sensing IC coupled to the first driving electrode and the first sensing electrode; A substrate, located between the touch sensing IC and the soft material layer; as well as The connecting element passes through the substrate and is used to fix the substrate to the soft material layer or the capacitive touch sensor layer.

5. The contact sensing system of claim 4, wherein: The substrate is a flexible printed circuit board or a gold finger printed circuit board.

6. The touch sensing system of claim 1, wherein: Further including: A contact sensing IC, coupled to the first driving electrode and the first sensing electrode, and welded to face the first side of the soft material layer; The support layer faces the second side of the soft material layer and supports the contact sensing IC.

7. The touch sensing system of claim 1, wherein: The auxiliary layer includes a heating layer, the heating layer includes a heating circuit, and the heating circuit includes: Heating electrodes; A constant voltage source, for generating a constant voltage; and The driving circuit is used to generate a driving current to the heating electrode according to the constant voltage.

8. The contact sensing system of claim 7, wherein: The driving circuit generates the driving current without turning on or off the switch.

9. A multi-sensor device, characterized in that: include: frame; a first sensor layer surrounding the frame; a second sensor layer surrounding the first sensor layer; A soft material layer, located between the first sensor layer and the second sensor layer, and surrounding the first sensor layer; as well as A flat material layer, located between the second sensor layer and the soft material layer, or between the first sensor layer and the soft material layer, wherein the flat material layer increases the flatness of the soft material layer; If the first sensor layer is located below the soft material layer, the second sensor layer is located above the soft material layer; The first sensor layer includes a first driving electrode and a first sensing electrode; The second sensor layer includes a second driving electrode and a second sensing electrode.

10. The multi-sensor device of claim 9, wherein: The flat layer is made of polyurethane.

11. The multi-sensor device of claim 9, wherein: Further including: A contact sensing IC coupled to the first driving electrode and the first sensing electrode; A substrate, located between the touch sensing IC and the soft material layer; as well as The connecting element passes through the substrate and is used to fix the substrate to the soft material layer or the first sensor layer.

12. The multi-sensor device of claim 11, wherein: The substrate is a flexible printed circuit board or a gold finger printed circuit board.

13. The multi-sensor device of claim 9, wherein: Further including: A contact sensing IC, coupled to the first driving electrode and the first sensing electrode, and welded to face the first side of the soft material layer; The support layer faces the second side of the soft material layer and supports the contact sensing IC.

14. The multi-sensor device of claim 9, wherein: The first sensor layer includes a heating layer, the heating layer includes a heating circuit, and the heating circuit includes: Heating electrodes; A constant voltage source, for generating a constant voltage; and The driving circuit is used to generate a driving current to the heating electrode according to the constant voltage.

15. The multi-sensor device of claim 14, wherein: The driving circuit generates the driving current without turning on or off the switch.

16. A transportation vehicle control device, characterized in that: include: frame; a heating layer, surrounding the frame; a first layer, surrounding the heating layer; A soft material layer, located between the heating layer and the first layer, and surrounding the heating layer; as well as A flat material layer, located between the first layer and the soft material layer, or between the heating layer and the soft material layer, wherein the flat material layer increases the flatness of the soft material layer; If the heating layer is located below the soft material layer, the first layer is located above the soft material layer; wherein the first layer includes a first electrode; The heating layer includes a heating electrode.

17. The vehicle control device according to claim 16, characterized in that: The heating layer comprises a heating circuit, and the heating circuit comprises: A constant voltage source, for generating a constant voltage; and The driving circuit is used to generate a driving current to the heating electrode according to the constant voltage.

18. The vehicle control device according to claim 17, characterized in that: The driving circuit generates the driving current without turning on or off the switch.

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