CN210721366U

CN210721366U - Tactile feedback module, touch screen, keyboard and electronic device

Info

Publication number: CN210721366U
Application number: CN201921795096.XU
Authority: CN
Inventors: 高菁; 孟锴
Original assignee: Nanchang OFilm Display Technology Co Ltd
Current assignee: Nanchang OFilm Display Technology Co Ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-06-09
Anticipated expiration: 2029-10-24

Abstract

The application relates to a touch feedback module, a touch screen, a keyboard and an electronic device, wherein the touch feedback module comprises at least two mutually-overlapped elastic control elements, each elastic control element comprises a conductive electrode layer and an elastic layer, which are mutually overlapped, each elastic layer comprises a mutually-independent pointed columnar elastic body, the central axis of each pointed columnar elastic body is perpendicular to the conductive electrode layer, and the pointed top of each pointed columnar elastic body deviates from the conductive electrode layer; the conductive electrode layer of one of the adjacent elasticity control elements is adjacent to the elastic layer of the other elasticity control element. The design of the sharp top reduces the contact area of the top end, so that the tactile feedback module can generate larger capacitance change when receiving smaller touch pressure, the pressure detection sensitivity of the tactile feedback module is improved, and the tactile feedback effect is obviously improved.

Description

Tactile feedback module, touch screen, keyboard and electronic device

Technical Field

The present application relates to the field of touch technologies, and in particular, to a haptic feedback module, a touch screen, a keyboard, and an electronic device.

Background

With the rapid development of touch technology, people use a large number of various keyboards and touch screens in daily life. However, most keyboard or touch screen presses today do not have a tactile feedback function. Experiments prove that the input speed and the accuracy of the keyboard with the touch feedback function are higher than those of a keyboard which only utilizes visual or sound feedback by more than 10%. If the tactile feedback function can be added in the keyboard or the touch screen, people can feel the tactile feedback effect when pressing the keys, and the performance of the product can be improved undoubtedly.

The conventional tactile feedback device for mobile phones mainly uses a vibration motor, i.e., an eccentric rotor vibrator. It takes 100 to 200 milliseconds to simulate a tactile feedback action for a click, and if a quick repeat click is required, this motor produces a noticeable feeling of hysteresis. Moreover, the motor is difficult to reflect the strength of vibration, so the vibration feedback experience is not ideal, and a mobile phone carrying the motor can only meet the requirements of a user on the vibration reminding function generally, and is difficult to apply to the key touch feedback. Therefore, a haptic feedback device with small volume, low energy consumption and sensitivity to pressure sensing is urgently needed to be found.

SUMMERY OF THE UTILITY MODEL

Therefore, it is desirable to provide a haptic feedback module, a touch screen, a keyboard and an electronic device having a haptic feedback function and sensitive pressure sensing.

One aspect of the present application provides a haptic feedback module comprising at least two resilient control elements stacked on each other;

the elastic force control element comprises a conductive electrode layer and an elastic layer which are overlapped with each other, the elastic layer comprises mutually independent pointed columnar elastic bodies, the central axis of each pointed columnar elastic body is perpendicular to the conductive electrode layer, and the pointed top of each pointed columnar elastic body deviates from the conductive electrode layer;

the conductive electrode layer of one of the adjacent elasticity control elements is adjacent to the elastic layer of the other elasticity control element under the action of an electric field force, and the pointed columnar elastic body in the elastic layer generates vibration under the action of the electric field force and generates vibration feedback under the action of the electric field force to generate vibration feedback.

According to the tactile feedback module, the voltage signals with different polarities are applied to the conductive electrode layers in the adjacent elastic force control elements, so that when the tactile feedback module senses touch pressure, the columnar elastic bodies generate vibration feedback under the action of the electric field force, and a user feels tactile feedback. Because the elastic layer comprises a plurality of mutually independent pointed columnar elastic bodies, the advantages that the columnar elastic bodies can easily generate elastic deformation and generate vibration feedback under stress are utilized, and the sensitivity of the touch feedback module on pressure detection is improved; the design of the sharp top reduces the contact area of the top end, so that the tactile feedback module can generate larger capacitance change when receiving smaller touch pressure, and the pressure detection sensitivity of the tactile feedback module is further improved. The vibration of the pointed columnar elastic bodies in different elastic layers can be superposed with each other, so that the tactile feedback effect of the tactile feedback module is improved.

In one embodiment, the peaked cylindrical elastomer includes:

the top is in a pointed shape; and

the base is columnar and is used for bearing the top.

In one embodiment, the top portion is conical or pyramidal; the base is cylindrical or prismatic.

In one embodiment, the peaked cylindrical elastomer is integrally formed.

In one embodiment, the maximum diameter of the pointed columnar elastomer in the orthographic projection of the conductive electrode layer plane is 0.01mm-1 mm.

In one embodiment, the height of the pointed columnar elastomer is 0.01mm-0.1 mm.

In one embodiment, the pointed columnar elastic bodies in the adjacent elastic layers are overlapped in an orthographic projection of the plane of the conductive electrode layer.

In one embodiment, the pointed columnar elastic bodies of the same elasticity control element are arranged in an array.

In one embodiment, the elastic force control element further comprises:

and the base material is overlapped with the conductive electrode layer.

In one embodiment, in the elasticity control element, the pointed columnar elastomer is connected with the conductive electrode layer.

An aspect of the present application provides a touch screen, including the haptic feedback module according to any one of the embodiments of the present application, configured to generate a vibration feedback under an electric field force by using a pointed pillar-shaped elastic body in the elastic layer when the touch screen senses a touch pressure.

An aspect of the application provides a keyboard, including according to the tactile feedback module in any one of this application embodiment, the tactile feedback module is used for the button, when the button sensing touches down, the pinnacle column elastomer in the elastic layer produces vibration feedback under the effect of electric field force.

An aspect of the application provides an electronic device comprising a haptic feedback module according to any one of the embodiments of the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain drawings of other embodiments based on these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a haptic feedback module provided in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a peaked cylindrical elastomer provided in an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a haptic feedback module according to another embodiment of the present application.

FIG. 4 is a diagram illustrating driving voltages of a haptic feedback module according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a keyboard provided in an embodiment of the present application.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In describing positional relationships, unless otherwise specified, when an element such as a layer substrate is referred to as being "on" another layer, it can be directly on the other layer or intervening layers may also be present. Further, when a layer is referred to as being "under" another layer, it can be directly under, or one or more intervening layers may also be present. It will also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present. The terms "up" and "down" are used herein to refer to the side of the haptic feedback module that is relatively close to the user as "up" and the side of the haptic feedback module that is relatively far from the user as "down" relative to the degree to which the haptic feedback module is close to the user during application.

Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.

Throughout the description of the present application, it is to be noted that, unless expressly stated or limited otherwise, the terms "connected" or "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection may be direct or indirect via an intermediate medium, and the connection may be internal to the two components. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In addition, in the description of the present application, the meaning of "plurality", "each other", "superimposed", "stacked" and "several" is two or more unless otherwise specified.

The haptic feedback module provided in one embodiment of the present application includes at least two elastic force control elements overlapped with each other, where the elastic force control elements include a conductive electrode layer and an elastic layer overlapped with each other, the elastic layer includes pointed columnar elastic bodies independent from each other, a central axis of each pointed columnar elastic body is perpendicular to the conductive electrode layer, and a pointed tip of each pointed columnar elastic body deviates from the conductive electrode layer; wherein, the conductive electrode layer of one of the adjacent elasticity control elements is adjacent to the elastic layer of the other elasticity control element; by applying voltage signals with different polarities to the conductive electrode layers in the adjacent elastic force control elements, when the tactile feedback module senses touch pressure, the pointed columnar elastic bodies in the elastic layers generate vibration feedback under the action of an electric field force. The vibration of the pointed columnar elastic bodies in different elastic layers can be superposed with each other, so that the tactile feedback effect of the tactile feedback module is improved.

Specifically, the material used for the pointed columnar elastomer may be at least one of silicone rubber, acrylate elastomer, polyurethane elastomer, nitrile rubber, vinylidene fluoride trifluoroethylene, and their corresponding organic-inorganic, organic-organic composite materials, and the like.

In the tactile feedback module in the above embodiment, when the tactile feedback module senses a touch pressure, the pointed columnar elastic body generates a vibration feedback under the action of an electric field force by applying voltage signals with different polarities to the conductive electrode layers in the adjacent elastic force control elements, so that a user feels the tactile feedback. Because the elastic layer comprises a plurality of mutually independent pointed columnar elastic bodies, the touch feedback module has improved sensitivity to pressure detection by utilizing the advantages that the columnar elastic bodies can easily generate elastic deformation and generate vibration feedback under stress; the design of the sharp top reduces the contact area of the top end, so that the tactile feedback module can generate larger capacitance change when receiving smaller touch pressure, and the pressure detection sensitivity of the tactile feedback module is further improved.

In one embodiment of the present application, the peaked columnar elastomers are arranged in an array. The pointed columnar elastomer can comprise a top part and a base part which are connected with each other, wherein the top part is in a conical shape or a pyramid shape, and the base part is in a cylindrical/truncated cone shape or a prism/truncated cone shape, namely, the elastomer can be arranged into a combined body of a cylinder/truncated cone or a combined body of a prism/truncated cone and a pyramid. In the embodiment of the present application, the peaked columnar elastic body may be an integrally molded structure. Wherein, the maximum diameter of the orthographic projection of the pinnacle columnar elastomer on the plane of the conductive electrode layer is 0.01mm-1mm, and the maximum diameter is defined as: if the projection is circular, the diameter of the circle is obtained, and if the projection is other shapes, the maximum diameter is the distance between the two farthest points on the projection; the height of the pinnacle columnar elastomer is 0.01mm-0.1 mm. The pointed columnar elastic bodies in the adjacent elastic layers are overlapped in the orthographic projection of the plane of the conductive electrode layer, so that pressure transmission is performed between the upper elastic layer and the lower elastic layer, and the tactile feedback effect is improved. The shape of the pointed columnar elastic body given in the embodiment of the present application is not limited to the present application for specifically explaining the specific working principle of the present application, and only equivalent changes are made to the shape of the pointed columnar elastic body without changing the working principle of the present application, which should be considered as belonging to the protection scope of the present application.

In the tactile feedback module in the above embodiment, the pointed columnar elastic body is located between the capacitance sensors formed by the upper and lower conductive electrode layers, so that the capacitance sensors can generate a larger capacitance change rate under the action of applying a smaller pressure, and the sensitivity of the tactile feedback module to pressure detection is further improved. Taking the elastic body as an example of a columnar structure, the contact surface between the columnar elastic body and the upper conductive electrode layer is a circular surface, and according to the pressure formula P ═ F/S, under the same applied force, the larger the contact surface S is, the smaller the pressure P is, the more the elastic body is not easily deformed, and therefore, the smaller the capacitance change rate of the capacitance sensor is, the lower the pressure sensing sensitivity is. The pointed-top columnar elastic body is adopted, so that the contact area of the top end is reduced, the contact surface S is reduced under the condition of the same force application, the pressure P is increased, and the elastic body is more easily deformed, so that the capacitance change rate of the capacitance sensor is increased, and the pressure sensing sensitivity is improved.

Further, in the haptic feedback module of the above embodiment, the elastic force control element further includes a substrate laminated with the conductive electrode layer. After the conductive electrode layer is sprayed on the surface of the base material, the pointed columnar elastomer is arranged on the surface of the conductive electrode layer. The pointed columnar elastic body is fixedly connected to the conductive electrode layer. In this embodiment, the conductive electrode layer is preferably connected to the pointed columnar elastic body by means of adhesion.

Further, in the above embodiments, the substrate may be made of at least one of flexible materials such as Polyimide (PI), Polyethylene terephthalate (PET), and Polyethylene naphthalate (PEN). The elastic material layer can be made of at least one of silicone rubber, acrylate elastomer, polyurethane elastomer, nitrile rubber, vinylidene fluoride trifluoroethylene and corresponding organic-inorganic and organic-organic composite materials thereof.

In an embodiment of the present application, a touch screen device is provided, including any of the tactile feedback modules provided in the embodiments of the present application, configured to sense an inch of touch on the touch screen, where the pointed columnar elastic body in the elastic layer generates vibration under the action of an electric field force, so that the vibration is fed back to a user touching the touch screen.

In particular, the conductive electrode layer may be constituted by an electrode array. The electrode array of the conductive electrode layer can be composed of a plurality of mutually independent strip electrodes, or a plurality of chains connected with a plurality of electrode blocks, or mutually independent block electrodes. The orthographic projection of the electrode arrays of the adjacent conductive electrode layers in a horizontal two-dimensional plane has a certain area of cross areas, so that a plurality of elastic force control areas are formed.

Further, in the above embodiments, the elastic material layer has a macroscopic property of being optically transparent, so as to allow light to pass through, and the "transparent" may be understood as "transparent" and "substantially transparent" in the present application, on the premise that the content of the haptic feedback module is not obstructed.

Further, in the above embodiments, the conductive electrode layer of the elastic force control element may be made of a transparent conductive material, such as ITO, ZnO, carbon nanotube, graphene, etc.; the touch feedback module can also be made of non-transparent conductive materials, and the size of the conductive materials is controlled so that the human eye can observe the display content of the touch feedback module without being influenced by the conductive electrode layers. The conductive material can be selected from silver paste, carbon paste, nano silver wires, PEDOT, carbon nanotubes, graphene conductors and other conductive materials.

In an embodiment of the present application, a keyboard is provided, including any of the tactile feedback modules described in the embodiments of the present application, where the tactile feedback module is used for a key to sense a touch control inch, and the pointed columnar elastic body in the elastic layer vibrates under the action of an electric field force, so that the vibration is fed back to a user touching the key.

Specifically, one touch feedback module can be used as one key in the keyboard, and different driving voltages can be applied to different keys, so that different vibration feedback effects can be obtained when different keys are touched.

Some embodiments of the present application will be further described below with reference to the accompanying drawings.

In one embodiment of the present application, as shown in fig. 1, a haptic feedback module is provided, which includes a plurality of stacked elastic force control elements (not shown), and further includes a conductive layer on the top elastic force control element to form a haptic feedback module with at least two elastic layers; each elasticity control element comprises a conductive electrode layer 10 and an elastic layer 20 which are overlapped with each other, the elastic layer 20 comprises mutually independent pointed columnar elastic bodies 21, the central axis of each pointed columnar elastic body 21 is perpendicular to the conductive electrode layer 10, and the pointed top of each pointed columnar elastic body 21 is away from the conductive electrode layer 10; wherein, the conductive electrode layer 10 of one of the adjacent elasticity control elements is adjacent to the elastic layer 20 of the other elasticity control element; by applying voltage signals with different polarities to the conductive electrode layers 10 in the adjacent elastic force control elements, when the tactile feedback module senses a touch pressure, the pointed columnar elastic bodies 21 in each elastic layer vibrate under the action of an electric field force to generate a tactile feedback effect. Moreover, the vibrations of the pointed columnar elastic bodies 21 in different elastic layers 20 can be superposed with each other, so that the tactile feedback effect of the tactile feedback module is further improved.

Specifically, as shown in fig. 2, the peaked columnar elastic body 21 may include a top 211 and a base 212 connected to each other, wherein the top 211 may have a conical shape or a pyramid shape, and the base 212 may have a cylindrical/mesa shape or a prism/mesa shape. That is, the steeple-shaped columnar elastic body 21 may be provided as a combination of a cylinder/truncated cone and a pyramid, or a combination of a prism/truncated cone and a pyramid. In the present embodiment, the peaked columnar elastic body 21 may be an integrally molded structure. Wherein, the maximum diameter of the orthographic projection of the pinnacle columnar elastic body 21 on the horizontal plane is 0.01mm-1mm, and the maximum diameter is defined as: if the projection is circular, the diameter of the circle is obtained, and if the projection is other shapes, the maximum diameter is the distance between the two farthest points on the projection; the height of the pinnacle columnar elastomer 21 is 0.01mm to 0.1 mm. In this embodiment, the pointed columnar elastic bodies 21 may be arranged in an array, and the orthogonal projections of the pointed columnar elastic bodies 21 in the adjacent elastic layers on the plane of the conductive electrode layer are overlapped, so as to facilitate pressure transmission between the upper and lower elastic layers, and improve the haptic feedback effect. The shape of the pointed columnar elastic body given in the embodiment of the present application is not limited to the present application for specifically explaining the specific working principle of the present application, and only equivalent changes are made to the shape of the pointed columnar elastic body without changing the working principle of the present application, which should be considered as belonging to the protection scope of the present application.

In the tactile feedback module in the above embodiments, when the tactile feedback module senses a touch pressure, the pointed pillar-shaped elastic body generates a vibration feedback under the action of an electric field force by applying voltage signals with different polarities to the conductive electrode layers in the adjacent elastic force control elements, so that a user feels the tactile feedback. Because the elastic layer comprises a plurality of mutually independent pointed columnar elastic bodies, the touch feedback module has improved sensitivity to pressure detection by utilizing the advantages that the columnar elastic bodies can easily generate elastic deformation and generate vibration feedback under stress; the design of the sharp top reduces the contact area of the top end, so that the tactile feedback module can generate larger capacitance change when receiving smaller touch pressure, and the pressure detection sensitivity of the tactile feedback module is further improved. The vibration of the pointed columnar elastic bodies in different elastic layers can be superposed with each other, so that the tactile feedback effect of the tactile feedback module is further improved.

Further, in the haptic feedback module of the above embodiment, the elastic force control element further includes a substrate 30 stacked with the conductive electrode layer. As shown in fig. 3, after the conductive electrode layer 10 is sprayed on the surface of the substrate 30, the elastic layer 20 including a plurality of independent pointed columnar elastic bodies 21 is disposed on the surface of the conductive electrode layer 10. The central axis of each pointed columnar elastic body 21 is perpendicular to the conductive electrode layer 10, and the pointed top of each pointed columnar elastic body 21 deviates from the conductive electrode layer 10; wherein the conductive electrode layer 10 of one of the adjacent elasticity control elements is adjacent to the elastic layer 20 of the other elasticity control element. The peaked columnar elastic body 21 is fixedly connected to the conductive electrode layer 10. In this embodiment, the conductive electrode layer 10 is preferably connected to the pointed columnar elastic body 21 by adhesion. By applying voltage signals with different polarities to the conductive electrode layers 10 in the adjacent elastic force control elements, when the tactile feedback module senses a touch pressure, the pointed columnar elastic bodies 21 in each elastic layer vibrate under the action of an electric field force to generate a tactile feedback effect. Moreover, the vibrations of the pointed columnar elastic bodies 21 in different elastic layers 20 can be superposed with each other, so that the tactile feedback effect of the tactile feedback module is further improved.

Further, in the above embodiments, the base material may be made of at least one of flexible materials such as Polyimide (PI), Polyethylene terephthalate (PET), and Polyethylene naphthalate (PEN). The elastic material layer can be made of at least one of silicone rubber, acrylate elastomer, polyurethane elastomer, nitrile rubber, vinylidene fluoride trifluoroethylene and corresponding organic-inorganic and organic-organic composite materials thereof.

In one embodiment of the present application, the input voltage driving signal to the adjacent conductive electrode layer is a triangular wave periodic signal. The driving signal illustrated in fig. 4 is a unipolar triangular wave periodic signal, and the frequency may be about 20Hz-200Hz, which is a frequency simulating the use of a conventional keyboard, such as a mechanical keyboard. The input signal in fig. 4 is divided into four different control sampling points in one period, the working states of the haptic feedback module under different driving voltages are briefly described at the different control sampling points, and the sampling moments of the sampling points are recorded as T1, T2, T3 and T4 respectively. The working principle of the haptic feedback module is briefly described below with reference to fig. 4:

during the T1-T2 state: at the time of T1, the input voltage is 0, and the pinnacle columnar elastic body is not deformed and is in an original state; at the time of T1-T2, the input voltage gradually increases, the electric field force between the adjacent conductive electrode layers gradually increases, the electrostatic adsorption force between the adjacent conductive electrode layers gradually increases, and gradually increased electric field acting force is generated on the pointed columnar elastic body between the two conductive electrode layers; at time T2, the input voltage reaches an amplitude value, the electric field force between the adjacent conductive electrode layers is the largest, the adsorption force between the adjacent conductive electrode layers is also the largest, and the deformation amount of the pointed columnar elastic body between the adjacent conductive electrode layers is also the largest at this time.

During the T2-T3 state: at the time of T2 to T3, the input voltage is gradually reduced, the electric field force between the adjacent conductive electrode layers is gradually reduced, the adsorption force between the adjacent conductive electrode layers is also gradually reduced, and the pointed columnar elastic body between the adjacent conductive electrode layers slowly performs the rebound action according to the self rebound force; at time T3, when the input voltage is 0, the elastomer in the shape of pointed pillar between the adjacent conductive electrode layers springs back to its original state.

During the T3-T4 state: at the time T3 to T4, the driving input signal is substantially 0, and there is substantially no electric field force acting between the adjacent conductive electrode layers, so there is no electrostatic adsorption force, and the pointed columnar elastic body between the adjacent conductive electrode layers maintains the original state.

The driving signal comprises a periodically-varying signal as shown between the time points T1-T4, the frequency of the driving signal shown in fig. 4 is preferably 50Hz, and in some embodiments, the frequency of the input signal may be 20Hz-200Hz, and driving voltage signals with different frequencies or different amplitudes may be input according to different user requirements. For example, if the user wants to experience a stronger vibratory sensation, the signal frequency may be increased. The input signal changes periodically, and the pointed columnar elastic body vibrates periodically and changes from 0 deformation to the maximum deformation all the time, so that a user of the tactile feedback module provided by the application feels the effect of tactile feedback.

In an embodiment of the present application, a touch screen device is provided, including any of the tactile feedback modules provided in the embodiments of the present application, configured to generate vibration under an electric field force when the touch screen senses a touch-control inch, so that the vibration is fed back to a user touching the touch screen.

Specifically, a tactile feedback module may be used in a touch screen device, and by providing an electrode array of a conductive electrode layer, for example, the conductive electrode layer may include a plurality of mutually independent strip-shaped electrodes, or a plurality of chains connected with a plurality of electrode blocks, or mutually independent block-shaped electrodes, and orthogonal projections of the electrode arrays of adjacent conductive electrode layers in a horizontal two-dimensional plane have a certain area of intersection region, so as to form a plurality of elastic force control regions, and when a user touches and presses the elastic force control regions, the user can feel the effect of vibration feedback.

In an embodiment of the present application, a keyboard is provided, including any of the tactile feedback modules provided in the embodiments of the present application, where the tactile feedback module is used for a key, and when the key senses a touch-control inch, the pointed columnar elastic body generates vibration under the action of an electric field force, so that the vibration is fed back to a user touching the key.

Specifically, one tactile feedback module can be used as a key in the keyboard, and different driving voltages can be applied to different keys, so that different vibration feedback effects can be obtained when different keys are touched and pressed. As shown in fig. 5, each key may employ one of the haptic feedback modules described in the embodiments of the present application. For example, if it is desired to improve the touch feedback effect of the user on the "Enter" key, the frequency and/or amplitude of the driving voltage signal applied to the haptic feedback module 40 in the key can be increased, so that the user can feel a stronger haptic feedback effect when touching and pressing the "Enter" key.

In an embodiment of the present disclosure, the conductive electrode layer may be formed on a substrate, such as a thin film material of Polyethylene terephthalate (PET), Polycarbonate (PC), glass, or the like, by sputtering, evaporation, printing, or the like. The electrode pattern of the conductive electrode layer can be obtained by etching an Indium Tin Oxide (ITO) conductive film, screen-printing conductive paste on PET, or by using a Metal wire mesh process.

The application provides a tactile feedback module, through the voltage signal that applys different polarity to the conductive electrode layer in the adjacent elasticity control element for tactile feedback module when the sensing touches pressure, the pinnacle column elastomer produces vibration feedback under the effect of electric field force, so that the user feels tactile feedback. Because the elastic layer comprises a plurality of mutually independent pointed columnar elastic bodies, the touch feedback module has improved sensitivity to pressure detection by utilizing the advantages that the columnar elastic bodies can easily generate elastic deformation and generate vibration feedback under stress; the design of the sharp top reduces the contact area of the top end, so that the tactile feedback module can generate larger capacitance change when receiving smaller touch pressure, and the pressure detection sensitivity of the tactile feedback module is further improved. The vibration of the pointed columnar elastic bodies in different elastic layers can be superposed with each other, so that the tactile feedback effect of the tactile feedback module is improved.

The application provides a tactile feedback module can be applied to in intelligent wrist-watch, panel computer, vehicle navigation, intelligence dress product, film keyboard, even future black science and technology product. The driving voltage of the tactile feedback module can be changed according to the requirements of the specific application scene of the tactile feedback module, so that different requirements of a user on the tactile feedback effect can be met.

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

Claims

1. A haptic feedback module comprising at least two superimposed spring control elements, wherein:

the conductive electrode layer of one of the adjacent elasticity control elements is adjacent to the elastic layer of the other elasticity control element.

2. A haptic feedback module as recited in claim 1 wherein said peaked cylindrical elastomer comprises:

the top is in a pointed shape; and

the base is columnar and is used for bearing the top.

3. A haptic feedback module as recited in claim 2 wherein:

the top part is conical or pyramid-shaped;

the base is cylindrical or prismatic.

4. A haptic feedback module as recited in claim 2 wherein said peaked cylindrical elastomer is integrally formed.

5. A haptic feedback module as recited in claim 2 wherein said peaked cylindrical elastomer has a maximum diameter of 0.01mm-1mm in an orthographic projection of said peaked cylindrical elastomer in a plane of said conductive electrode layer.

6. A haptic feedback module as recited in claim 2 wherein said peaked cylindrical elastomer has a height of 0.01mm-0.1 mm.

7. A haptic feedback module as recited in any of claims 1-6 wherein said peaked columnar elastic bodies in adjacent elastic layers have an overlap in orthographic projection of the plane of said conductive electrode layer.

8. A haptic feedback module as recited in any of claims 1-6 wherein said peaked cylindrical elastomers of the same spring force control element are arranged in an array.

9. A haptic feedback module as recited in any of claims 1-6 wherein said spring force control element further comprises:

and the base material is overlapped with the conductive electrode layer.

10. A haptic feedback module as recited in any of claims 1-6 wherein said peaked cylindrical elastomer is coupled to said conductive electrode layer in said spring force control element.

11. A touch screen, comprising:

the haptic feedback module of any one of claims 1-10, wherein the peaked cylindrical elastic body generates a vibration feedback under an electric field force when the touch screen senses a touch pressure.

12. A keyboard, comprising:

the haptic feedback module of any of claims 1-10, wherein the haptic feedback module is configured for a key, and when the key senses a touch, the peaked cylindrical elastic body generates a vibration feedback under an electric field force.

13. An electronic device, comprising:

the haptic feedback module of any of claims 1-10.