CN112817430A

CN112817430A - Haptic feedback module and haptic feedback device

Info

Publication number: CN112817430A
Application number: CN201911121546.1A
Authority: CN
Inventors: 李艳强; 于国华; 汪祥; 胡盛棚
Original assignee: Nanchang OFilm Display Technology Co Ltd
Current assignee: Nanchang OFilm Display Technology Co Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2021-05-18

Abstract

The invention relates to a tactile feedback module and a tactile feedback device. The haptic feedback module includes: a plurality of tactile feedback electrodes stacked in sequence, each tactile feedback electrode including an insulating layer, a conductive layer, and an elastic layer stacked in sequence; one of the conductive layers is defined as a common conductive layer, and the conductive layers except the common conductive layer are defined as an aggregate conductive layer group; the common conducting layer is provided with a first electrode leading-out end, the integrated conducting layer group is provided with a plurality of sub-electrode leading-out ends, and the plurality of sub-electrode leading-out ends jointly form a second electrode leading-out end; wherein an input voltage of the first electrode lead-out terminal is different from an input voltage of the second electrode lead-out terminal. The technical effects are as follows: the multiple conducting layers of the set conducting layer group can form voltage difference with the common conducting layer to generate electric field force and provide elastic deformation vibration effect, so that the effect of tactile feedback is realized, and the condition that the accuracy of input voltage is influenced by dislocation of the multiple tactile feedback electrodes in staggered superposition is reduced.

Description

Haptic feedback module and haptic feedback device

Technical Field

The invention relates to the technical field of touch, in particular to a touch feedback module and a touch feedback device.

Background

The tactile feedback device such as a tactile keyboard, a tactile steering wheel and a tactile massage chair comprises a tactile feedback module for tactile feedback. The touch feedback module comprises a plurality of touch feedback electrodes which are stacked, the touch feedback electrodes comprise insulating layers, conducting layers and elastic layers which are stacked in sequence, voltages with different polarities are applied to the two conducting layers of the adjacent touch feedback electrodes, and the elastic layers between the two conducting layers are elastically deformed and vibrated by electric field force generated by voltage difference, so that the touch feedback effect is realized. In order to ensure a good tactile feedback effect, two adjacent tactile feedback electrodes are generally symmetrically arranged, that is, the leading directions of the leading ends of the two adjacent electrodes are opposite, so that voltages with different polarities can be conveniently applied to different conductive layers at the same time. However, the sequential overlapping of the plurality of tactile feedback electrodes is likely to cause misalignment, which affects the accuracy of the simultaneous voltage application.

Disclosure of Invention

In view of the above, it is necessary to provide a haptic feedback module and a haptic feedback device, which are directed to the problem that the sequential overlapping of a plurality of haptic feedback electrodes is likely to cause misalignment and affect the accuracy of the simultaneous voltage application.

A haptic feedback module, comprising: a plurality of tactile feedback electrodes stacked in sequence, each tactile feedback electrode including an insulating layer, a conductive layer, and an elastic layer stacked in sequence; one of the conducting layers is defined as a common conducting layer, and the conducting layers except the common conducting layer are defined as an aggregate conducting layer group; the common conducting layer is provided with a first electrode leading-out end, the set conducting layer group is provided with a plurality of sub-electrode leading-out ends, and the plurality of sub-electrode leading-out ends are pressed to form a second electrode leading-out end; wherein an input voltage of the first electrode lead is different from an input voltage of the second electrode lead.

The technical scheme at least has the following technical effects: one of the conducting layers is selected as a common conducting layer, the other conducting layers form an integrated conducting layer group together, the integrated conducting layer group provides the same voltage, the conducting layers of the integrated conducting layer group can form a voltage difference with the common conducting layer to generate an electric field force and provide an elastic deformation vibration effect, so that a tactile feedback effect is realized, and the condition that the accuracy of input voltage is influenced due to dislocation of a plurality of tactile feedback electrodes during staggered superposition is reduced.

In one embodiment, the common conductive layer is a ground layer.

According to the technical scheme, the plurality of conductive layers are provided with the ground layer, the ground layer is set to be the common electrode layer, and the other conductive layers can generate voltage difference with the common electrode layer, so that electric field force is generated, the elastic layer can be elastically deformed, and the effect of tactile feedback is realized.

In one embodiment, the number of conductive layers is an odd number, and the common conductive layer is a centrally located one of the plurality of conductive layers.

When the number of piles of conducting layer was the odd among the above-mentioned technical scheme, set for the one deck that is in central position in sharing conducting layer for a plurality of conducting layers, so set up for other conducting layers all can produce relatively great electric field force with sharing conducting layer between, guarantee better tactile feedback effect.

In one embodiment, the number of conductive layers is an even number, and the common conductive layer is one of two centrally located layers of the plurality of conductive layers.

In the above technical solution, when the number of conductive layers is an even number, none of the plurality of conductive layers is at a physically centered position, the centered position of the plurality of conductive layers can be regarded as two layers, the common conductive layer is one of the two layers, and in another angle, the common conductive layer is set to be one of front and rear layers adjacent to the physically centered position, so that electric field force generated between other conductive layers and the common conductive layer is as large as possible, and a good haptic feedback effect is ensured.

In one embodiment, two adjacent tactile feedback electrodes are physically connected to each other.

According to the technical scheme, the two adjacent tactile feedback electrodes are connected together, namely the tactile feedback electrodes are sequentially stacked and sequentially connected to form a whole, the situation that the stacking effect is influenced due to the fact that the adjacent tactile feedback electrodes are staggered can be avoided, and the stacking reliability and stability of the tactile feedback electrodes are guaranteed.

In one embodiment, the number of stacked layers of the tactile feedback electrode is 3-10.

The number of stacked layers of the tactile feedback electrode in the technical scheme is multiple, the tactile feedback effect of the elastic layer can be improved, the situation that the elastic layer generates elastic deformation and vibration too small due to too small electric field force generated by a single layer is avoided, and meanwhile, the situation that the thickness is too large due to too many stacked layers is reduced due to the number of stacked layers in the range.

In one embodiment, the input voltage to the first electrode terminal is of opposite polarity to the input voltage to the second electrode terminal.

According to the technical scheme, the input voltage of the first electrode leading-out end and the input voltage of the second electrode leading-out end are opposite in polarity, and the generation of voltage difference can be guaranteed no matter whether the two input voltages are large or small, so that electric field force can be generated, elastic deformation vibration of the elastic layer can be guaranteed, and the effect of touch feedback is guaranteed.

In one embodiment, the input voltage to the first electrode terminal and the input voltage to the second electrode terminal are different values of the same polarity.

The input voltage of the first electrode leading-out end and the input voltage of the second electrode leading-out end in the technical scheme are different values of the same polarity, so that the generation of voltage difference can be ensured as long as the values of the two input voltages are different in size, electric field force can be ensured to be generated, elastic deformation vibration can be generated by the elastic layer, and the effect of touch feedback is ensured.

In one embodiment, the tactile feedback module further comprises an outer insulating layer, an outer conductive layer formed on the surface of the outer insulating layer, and the outer conductive layer is stacked on the exposed elastic layer in the plurality of tactile feedback electrodes.

According to the technical scheme, the plurality of tactile feedback electrodes are in a laminated relation, so that the tactile feedback electrode on the outermost layer exists, the elastic layer of the tactile feedback electrode is not covered, and the side, away from the conductive layer, of the tactile feedback electrode is exposed.

A haptic feedback device, comprising: at least one set of haptic feedback modules as described in any of the above embodiments; and the pressing layer is arranged on the surface of the tactile feedback module.

Drawings

FIG. 1 is a schematic diagram of a haptic feedback module in accordance with an embodiment of the present invention;

FIG. 2 is a schematic diagram of a haptic feedback module in accordance with another embodiment of the present invention;

FIG. 3 is an exploded view of a haptic feedback electrode in a haptic feedback module in accordance with one embodiment of the present invention;

FIG. 4 is a schematic diagram of a haptic feedback electrode in a haptic feedback device in accordance with an embodiment of the present invention;

FIG. 5 is an exploded view of a haptic feedback device in accordance with an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a haptic feedback device according to an embodiment of the present invention.

Wherein:

10. haptic feedback module 100, haptic feedback electrode 110, and insulating layer

120. Conductive layer 122, feedback region 124, electrode lead-out

130. Elastic layer 132, elastic substrate 134, elastic column

140. A common tactile feedback electrode 150, a common conductive layer 152, a first electrode lead

160. Set tactile feedback electrode set 170, set conductive layer set 172, sub-electrode terminals

174. Second electrode leading-out terminal 180, adhesive layer

200. Haptic feedback device 210, compression layer 220, connection port

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, an embodiment of the invention provides a haptic feedback module 10, including: a plurality of tactile feedback electrodes 100 stacked in sequence, each tactile feedback electrode 100 including an insulating layer 110, a conductive layer 120, and an elastic layer 130 stacked in sequence; one of the plurality of conductive layers 120 is defined as a common conductive layer 150, and the plurality of conductive layers 120 except the common conductive layer 150 are defined as an aggregate conductive layer group 170; the common conductive layer 150 has a first electrode terminal 152, the group of aggregate conductive layers 170 has a plurality of sub-electrode terminals 172, and the plurality of sub-electrode terminals 172 collectively form a second electrode terminal 174; wherein the input voltage of the first electrode lead 152 is different from the input voltage of the second electrode lead 174.

Specifically, as shown in fig. 3, each haptic feedback electrode 100 includes an insulating layer 110, a conductive layer 120, and an elastic layer 130, which are sequentially stacked. The insulating layer 110 is formed of a separate transparent insulating film, and may be formed of at least one material such as Polyimide (PI), Polyethylene terephthalate (PET), or Polyethylene Naphthalate (PEN). In this embodiment, the insulating layer 110 may be made of PET, and the bending radius that can be borne is 0.5 mm.

The conductive layer 120 is made of a conductive material, and may be at least one of silver paste, carbon paste, silver nanowires, carbon nanotubes, graphene, and other conductive materials. The conductive layer 120 is disposed on the insulating layer 110 by evaporation, printing, or the like. The conductive layer 120 may be a unitary layer or may be patterned. In this embodiment, the conductive layer 120 can be made of silver paste, and can resist bending. Conductive layer 120 includes a feedback region 122 and an electrode lead 124.

The elastic layer 130 is made of an elastic material having an optical transparency, and may be at least one of silicone rubber, an acrylate elastic layer, a polyurethane elastic layer, nitrile rubber, vinylidene fluoride trifluoroethylene, and their corresponding organic-inorganic and organic-organic composite materials. The elastic layer 130 may also be at least one of a foamed cotton layer, a porous plastic layer, a porous polyester layer, a porous polypropylene layer, a foamed cotton glue layer, and the like. In this embodiment, the elastic layer 130 may be made of a silicone material, the elastic layer 130 includes an elastic substrate 132 and a plurality of elastic pillars 134 formed on the elastic substrate 132, and the elastic pillars 134 form a compression space to realize elastic deformation vibration of the elastic layer 130.

As shown in fig. 1 and 2, the number of layers of conductive layer 120 is equal to the number of layers of lamination of tactile feedback electrode 100. One of the plurality of conductive layers 120 is selected as a common conductive layer 150, and the other conductive layers 120 collectively form an aggregate conductive layer group 170. At this time, the tactile feedback electrode 100 to which the common conductive layer 150 belongs is referred to as a common tactile feedback electrode 140, and the plurality of tactile feedback electrodes 100 to which the aggregate conductive layer group 170 belongs is collectively referred to as an aggregate tactile feedback electrode group 160. The common conductive layer 150 may be any one of the plurality of conductive layers 120. Common conductive layer 150 has a first electrode terminal 152, and group 170 of conductive layers includes a plurality of conductive layers 120, each conductive layer 120 having a sub-electrode terminal 172, the plurality of sub-electrode terminals 172 collectively forming a second electrode terminal 174. In this configuration, the set conductive layer group 170 provides the same voltage through the second electrode lead-out terminal 174, a voltage difference can be formed between the plurality of conductive layers 120 in the set conductive layer group 170 and the common conductive layer 150 to generate an electric field force, the electric field force causes the conductive layers 120 to be displaced by an acting force, and further drives the elastic layer 130 to generate elastic compression deformation or elastic tensile deformation, when the voltage disappears, the elastic layer 130 recovers to its original shape, and further the tactile feedback electrode 100 recovers to its original shape, in this process, an operator can feel the tactile feedback effect due to a vibration effect generated by the elastic deformation of the elastic layer 130, for example, in order to reduce the occupied space of the tactile feedback module 10, the elastic layer 130 can be elastically compressed and deformed by the electric field force. Meanwhile, the dislocation phenomenon when a plurality of tactile feedback electrodes 100 are stacked in a staggered manner is reduced, it is not necessary to ensure that adjacent tactile feedback electrodes 100 always keep a symmetrical relationship, the sub-electrode leading ends 172 of other conductive layers 120 except the common conductive layer 150 form the second electrode leading end 174 together, as long as the first electrode leading end 152 and the second electrode leading end 174 are in different directions, for example, opposite directions or at a large angle, and no mutual physical interference exists, it is not necessary that all the conductive layers 120 are sequentially alternated in opposite directions, the conventional method that a plurality of tactile feedback electrodes are stacked in a staggered manner is avoided, the accumulation amount of dislocation errors caused by staggered stacking is reduced, and the tactile feedback effect of the pointing position is ensured.

It is understood that the plurality of sub-electrode terminals 172 in the set of conductive layers 170 may be pressed, bonded, etc. to collectively form the second electrode lead 174 to simultaneously supply a voltage to the plurality of sub-electrode terminals 172.

The technical scheme at least has the following technical effects: one of the plurality of conductive layers 120 is selected as a common conductive layer 150, the other conductive layers 120 form an aggregate conductive layer group 170 together, the aggregate conductive layer group 170 provides the same voltage, and the plurality of conductive layers 120 of the aggregate conductive layer group 170 can form a voltage difference with the common conductive layer 150 to generate an electric field force and provide an elastic deformation vibration effect, so that a tactile feedback effect is realized, and the situation that the accuracy of an input voltage is influenced by dislocation when the plurality of tactile feedback electrodes 100 are overlapped in a staggered mode is reduced.

In some embodiments, the common conductive layer 150 is a ground layer. It can be understood that, if a ground layer is provided in the plurality of conductive layers 120, the ground layer is set as the common electrode layer 150, and other layers are collectively formed as the set of conductive layers 170, a voltage difference can be generated between each of the plurality of conductive layers 120 in the set of conductive layers 170 and the common electrode layer 150, so as to generate an electric field force, and ensure that the elastic layer 130 can be elastically deformed, thereby achieving the effect of tactile feedback.

From the knowledge of physics and electricity, the smaller the distance between adjacent objects, the larger the generated electric force. Therefore, in order to generate a large electric field force, the common conductive layer 150 is preferably disposed at a central position among the plurality of conductive layers 120, and thus, distances between the other conductive layers 120 located at both sides of the common conductive layer 150 and the common conductive layer 150 are relatively small, the generated electric field force is relatively large, and the effect of elastically deforming the vibration is more remarkable.

In other embodiments, as shown in fig. 1, the number of conductive layers 120 is an odd number and common conductive layer 150 is a centrally located one of the plurality of conductive layers 120. In this embodiment, the number of conductive layers 120 is equal to the number of stacked layers of the tactile feedback electrode 100. It is to be understood that when the number of conductive layers 120 is odd, the common conductive layer 150 is set to be a centrally located one of the plurality of conductive layers 120, for example, the number of conductive layers 120 is 7, and the common electrode layer 150 is the 4 th layer. For another example, as shown in fig. 1, when the number of conductive layers 120 is 5, the common electrode layer 150 is the 3 rd layer. By such an arrangement, a relatively large electric field force can be generated between the other conductive layers 120 and the common conductive layer 150, so as to ensure a good haptic feedback effect.

As shown in fig. 2, in other embodiments, the number of conductive layers 120 is an even number, and common conductive layer 150 is one of the two centrally located layers of the plurality of conductive layers 120. In this embodiment, the number of conductive layers 120 is equal to the number of stacked layers of the tactile feedback electrode 100. It is understood that when the number of conductive layers 120 is an even number, none of the plurality of conductive layers 120 is physically centered, and the centered position of the plurality of conductive layers 120 can be considered as two layers, the common conductive layer 150 is one of the two layers, and in another aspect, the common conductive layer 150 is set to be one of the two layers adjacent to the physically centered position, for example, if the number of conductive layers 120 is 4, the common electrode layer 150 is 2 nd or 3 rd. For another example, if the number of conductive layers 120 is 10, the common electrode layer 150 is the 5 th layer or the 6 th layer. For another example, as shown in fig. 2, if the number of conductive layers 120 is 6, the common electrode layer 150 is the 3 rd layer or the 4 th layer. The arrangement is such that the electric field force generated between the other conductive layer 120 and the common conductive layer 150 is as large as possible, thereby ensuring a better haptic feedback effect.

Of course, the above three embodiments are merely preferred embodiments, and the common conductive layer 150 may be any one of the plurality of conductive layers 120.

In some embodiments, two adjacent tactile feedback electrodes 100 are physically connected to each other. Specifically, a mechanical connection manner, such as a snap, a concave-convex fit, or the like, may be adopted, and an adhesive manner may also be adopted. In the above technical solution, two adjacent tactile feedback electrodes 100 are connected together, that is, a plurality of tactile feedback electrodes 100 are sequentially stacked and sequentially connected to form a whole, so that a situation that a stacking effect is affected due to a misalignment between adjacent tactile feedback electrodes 100 can be avoided, and the stacking reliability and stability of the plurality of tactile feedback electrodes 100 are ensured.

Further, a glue layer is disposed between two adjacent tactile feedback electrodes 100. Specifically, it is assumed that two adjacent tactile feedback electrodes 100 are respectively defined as a front tactile feedback electrode and a rear tactile feedback electrode, and in the first type, the rear tactile feedback electrode is stacked above the front tactile feedback electrode, and the insulating layer of the rear tactile feedback electrode is stacked on the elastic layer of the front tactile feedback electrode, so that the adhesive layer is located between the insulating layer of the rear tactile feedback electrode and the elastic layer of the front tactile feedback electrode. In the second mode, the rear tactile feedback electrode is laminated above the front tactile feedback electrode, the elastic layer of the rear tactile feedback electrode is laminated on the insulating layer of the front tactile feedback electrode, and the glue layer is positioned between the elastic layer of the rear tactile feedback electrode and the insulating layer of the front tactile feedback electrode. The glue layer can be water glue or double-sided glue, and the water glue is OCA glue, OCR glue, SR glue and the like. The glue layer is preferably transparent glue, and can display the laminating effect of adjacent layers. The glue layer should be uniformly distributed between the two tactile feedback electrodes 100 to ensure the accuracy of the lamination effect, and there should be no air bubbles after the two tactile feedback electrodes 100 are bonded. In the above technical solution, two adjacent tactile feedback electrodes 100 are usually bonded and fixed together by glue layers, so that the situation that the overlapping effect is affected due to the dislocation between the adjacent tactile feedback electrodes 100 can be avoided, and the stacking reliability and stability of the plurality of tactile feedback electrodes 100 are ensured.

In some embodiments, the number of stacked layers of tactile feedback electrode 100 is 3-10 layers. For example, the tactile feedback electrode 100 has 3, 4, 6, 8, 10 layers, or the like laminated. The larger the number of laminated layers of the tactile feedback electrode 100, the larger the elastic deformation vibration of the elastic layer 130 is added up, and the more excellent the tactile feedback effect is produced. In the above technical solution, the number of stacked layers of the tactile feedback electrode 100 is multiple, which can improve the tactile feedback effect of the elastic layer 130, avoid the situation that the elastic vibration of the elastic layer 130 is too small due to too small electric field force generated by a single layer, and reduce the situation that the thickness is too large due to too many stacked layers. Of course, if the thickness of the tactile feedback electrode 100 can be made relatively thin, the number of stacked layers of the tactile feedback electrode 100 can also be increased, such as 11 layers, 13 layers, 15 layers, 17 layers, and the like. The number of stacked layers of haptic feedback electrode 100 may also be 2 if haptic feedback effects are not desired.

In some embodiments, the input voltage to the first electrode lead 152 is of opposite polarity to the input voltage to the second electrode lead 174. The two input voltages have opposite polarities, that is, one of the two input voltages is positive and the other is negative on the premise that a certain direction is taken as a reference direction. For example, if the input voltage to the first electrode lead 152 is 5 volts and the input voltage to the second electrode lead 174 is-1 volt, the voltage difference is 6 volts. For another example, if the input voltage to the first electrode lead 152 is-4 volts and the input voltage to the second electrode lead 174 is 3 volts, the voltage difference between the two is-7 volts. The value of the input voltage is only convenient to understand and read, and can be adjusted to a proper value according to the actual voltage standard and requirements. In the above technical solution, the input voltage of the first electrode leading-out terminal 152 and the input voltage of the second electrode leading-out terminal 174 have opposite polarities, so that the generation of the voltage difference can be ensured no matter whether the two input voltages are large or small, thereby ensuring that the electric field force can be generated, ensuring that the elastic layer 130 can generate elastic deformation vibration, and ensuring the effect of the tactile feedback.

In other embodiments, the input voltage to the first electrode lead 152 is a different value of the same polarity than the input voltage to the second electrode lead 174. The two input voltages are both positive or both negative with the same polarity, i.e. with a certain direction as a reference direction. For example, if the input voltage to the first electrode lead 152 is 5 volts and the input voltage to the second electrode lead 174 is 2 volts, the voltage difference is 3 volts. For another example, if the input voltage to the first electrode lead 152 is-5 volts and the input voltage to the second electrode lead 174 is-2 volts, the voltage difference between the two is-3 volts. As another example, if the input voltage to the first electrode lead 152 is 1 volt and the input voltage to the second electrode lead 174 is 4 volts, the voltage difference between the two is-3 volts. The value of the input voltage is only convenient to understand and read, and can be adjusted to a proper value according to the actual voltage standard and requirements. In the above technical solution, the input voltage of the first electrode leading-out terminal 152 and the input voltage of the second electrode leading-out terminal 174 are different values of the same polarity, and as long as the two input voltages have different values, the generation of the voltage difference can be ensured, thereby ensuring that the electric field force can be generated, ensuring that the elastic layer 130 can generate elastic deformation vibration, and ensuring the effect of the tactile feedback.

In some embodiments, the haptic feedback module 10 further includes an outer insulating layer, an outer conductive layer formed on a surface of the outer insulating layer, and an exposed elastic layer 130 stacked in the plurality of haptic feedback electrodes 100. It can be understood that, in the plurality of tactile feedback electrodes 100, since the plurality of tactile feedback electrodes 100 are stacked, there is an outermost tactile feedback electrode 100, the elastic layer 130 of which is not covered, and the side away from the attached conductive layer 120 is exposed, and in order to enable the elastic layer 130 to also be elastically deformed to perform the tactile feedback function, an outer conductive layer and an outer insulating layer are stacked on the exposed side of the elastic layer 130. The outer conductive layer and the outer insulating layer are identical in structure to the conductive layer 120 and the insulating layer 110 constituting the haptic feedback electrode 100. The elastic layer 130 and the outer conductive layer 210 are bonded by a double-sided adhesive tape or a water adhesive.

With continued reference to fig. 4-6, an embodiment of the present invention further provides a haptic feedback device 200, including: at least one set of haptic feedback modules 10 as described in any of the above embodiments; and the pressing layer 210 is arranged on the surface of the tactile feedback module 10. The haptic feedback device 200 includes, but is not limited to, a haptic keyboard, a haptic steering wheel, a haptic massage chair, and the like having a haptic feedback function. A corresponding number of haptic feedback modules 10 are configured according to the number of cells needed to implement haptic feedback. In this embodiment, a tactile keyboard is taken as an example for explanation.

As shown in fig. 4 to 6, if the tactile keyboard has 82 keys, 82 tactile feedback modules 10 are required, and a plurality of tactile feedback modules 10 may exist independently, or may share the same insulating layer 110 and the elastic substrate 132, that is, a plurality of spaced conductive layers 120 are disposed on the same insulating layer 110, an elastic substrate 132 is disposed on a plurality of conductive layers 120, and a plurality of spaced elastic columns 134 regions are disposed on the same elastic substrate 132 at positions corresponding to the conductive layers 120. A haptic feedback module 10 is illustrated in detail.

Specifically, a pressing layer 210 is stacked above the tactile feedback module 10, the pressing layer 210 is a surface touched by a user, and the pressing layer 210 refers to a key character or a keycap structure in the tactile keyboard and may be made of a PET material with a high degree of appearance. The adhesive layer 180 is interposed between the pressing layer 210 and the haptic feedback module 10 and between the haptic feedback electrodes 100. As shown in fig. 4, the elastic layer 130 is disposed below the adhesive layer 180, the conductive layer 120 is disposed below the elastic layer 130, the insulating layer 110 is disposed below the conductive layer 120, and the elastic layer 130, the conductive layer 120, and the insulating layer 110 are sequentially stacked to obtain the haptic feedback device 200 shown in fig. 5, wherein a plurality of haptic feedback electrodes 100 are stacked below the pressing layer 210. As shown in fig. 5, the haptic feedback module 10 has 3 layers of haptic feedback electrodes 100, and if the 3 rd layer of haptic feedback electrodes 100 is set as the common haptic feedback electrodes 140, the conductive layers 120 of the common haptic feedback electrodes 140 are the common conductive layers 150, the 1 st and 2 nd layers together form the set of haptic feedback electrodes 160, and the plurality of conductive layers 120 of the set of haptic feedback electrodes 160 together form the set of conductive layers 170. The first electrode lead 152 and the second electrode lead 174 are connected to the main board through the connection port 220 to realize a control relationship.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A haptic feedback module, comprising:

a plurality of tactile feedback electrodes stacked in sequence, each tactile feedback electrode including an insulating layer, a conductive layer, and an elastic layer stacked in sequence;

one of the conducting layers is defined as a common conducting layer, and the conducting layers except the common conducting layer are defined as an aggregate conducting layer group; the common conducting layer is provided with a first electrode leading-out end, the set conducting layer group is provided with a plurality of sub-electrode leading-out ends, and the plurality of sub-electrode leading-out ends jointly form a second electrode leading-out end; wherein an input voltage of the first electrode lead is different from an input voltage of the second electrode lead.

2. A haptic feedback module as recited in claim 1 wherein said common conductive layer is a ground layer.

3. A haptic feedback module as recited in claim 1 wherein said conductive layers have an odd number of layers and said common conductive layer is a centrally located one of said plurality of conductive layers.

4. A haptic feedback module as recited in claim 1 wherein said number of conductive layers is even and said common conductive layer is one of two centrally located layers of said plurality of conductive layers.

5. A haptic feedback module as recited in claim 1 wherein two adjacent haptic feedback electrodes are physically connected to each other.

6. A haptic feedback module as recited in claim 1 wherein said haptic feedback electrode has a number of stacked layers ranging from 3 layers to 10 layers.

7. A haptic feedback module as recited in claim 1 wherein said input voltage to said first electrode terminal is of opposite polarity to said input voltage to said second electrode terminal.

8. A haptic feedback module as recited in claim 1 wherein said input voltage to said first electrode terminal and said input voltage to said second electrode terminal are different values of the same polarity.

9. A haptic feedback module according to claim 1, further comprising an outer insulating layer, an outer conductive layer formed on a surface of the outer insulating layer, the outer conductive layer overlying an exposed elastic layer of the plurality of haptic feedback electrodes.

10. A haptic feedback device, comprising:

at least one set of haptic feedback modules according to any of claims 1 to 9;

and the pressing layer is arranged on the surface of the tactile feedback module.