CN112799501A - Tactile feedback module, touch screen, keyboard and electronic device - Google Patents
Tactile feedback module, touch screen, keyboard and electronic device Download PDFInfo
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- CN112799501A CN112799501A CN201911106759.7A CN201911106759A CN112799501A CN 112799501 A CN112799501 A CN 112799501A CN 201911106759 A CN201911106759 A CN 201911106759A CN 112799501 A CN112799501 A CN 112799501A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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Abstract
The application relates to a tactile feedback module, a touch screen, a keyboard and an electronic device, wherein the tactile feedback module comprises at least two layers of stacked elastic control elements; the elastic force control element comprises a first conductive electrode layer, a base material, a second conductive electrode layer and an elastic layer which are sequentially stacked; the elastic layer and the first conductive electrode layer in the adjacent elastic control elements are overlapped with each other, the elastic layer comprises mutually independent columnar elastic bodies, and driving signals with different polarities are respectively input into the first conductive electrode layer and the second conductive electrode layer in the elastic control unit, so that the touch feedback module senses touch pressure and generates vibration feedback under the action of an electric field force. Because the base material is saved between the two conductive electrode layers in the elastic force control element, the tactile feedback effect of the tactile feedback module is improved; the driving voltage which needs to be applied under the condition of generating the same vibration sense is reduced, thereby being beneficial to energy conservation and design of a driving circuit.
Description
Technical Field
The present application relates to the field of haptic feedback technologies, and in particular, to a haptic feedback module, a touch screen, a keyboard, and an electronic device.
Background
With the rapid development of intelligent products, various intelligent terminal products appear in daily life of people, and the touch input device is one of the key components of various intelligent terminal products, and the touch performance of the touch input device becomes one of the focuses of people.
However, conventional touch products generally do not have a function of tactile feedback, and people cannot feel obvious tactile feedback when touching the touch products, so that people cannot sense whether the motion of touch input is effective or not through the tactile feedback.
Disclosure of Invention
In view of the above, there is a need for a haptic feedback module, a touch screen, a keyboard and an electronic device with better haptic feedback effect.
One aspect of the present application provides a haptic feedback module comprising at least two stacked spring force control elements;
the elastic force control element comprises a first conductive electrode layer, a base material, a second conductive electrode layer and an elastic layer which are sequentially stacked, wherein the elastic layer comprises columnar elastic bodies which are mutually independent;
the elastic layers in the adjacent elastic control elements are adjacent to the first conductive electrode layer, and any elastic layer and the second conductive electrode layer and the first conductive electrode layer which are vertically adjacent to the elastic layer form an elastic control unit together;
drive signals with different polarities are respectively input to a first conductive electrode layer and a second conductive electrode layer in the elastic force control unit, so that when the touch feedback module senses touch pressure, the columnar elastic body generates vibration feedback under the action of an electric field force.
In the haptic feedback module according to the above embodiment, the elastic force control element is configured to include a first conductive electrode layer, a substrate, a second conductive electrode layer, and an elastic layer, which are sequentially stacked, and at least two layers of the elastic force control elements are stacked to form the haptic feedback module, wherein the elastic layer of the adjacent elastic force control elements is adjacent to the first conductive electrode layer, and the elastic layer, the second conductive electrode layer and the first conductive electrode layer, which are vertically adjacent to each other, form the elastic force control unit. The columnar elastic body is located in a capacitance sensor formed between the first conductive electrode layer and the second conductive electrode layer which are adjacent up and down, and driving signals with different polarities are respectively input into the first conductive electrode layer and the second conductive electrode layer in the elastic force control unit, so that the columnar elastic body generates vibration feedback under the action of an electric field force when the touch feedback module senses touch pressure. Because the base material is saved between the first conductive electrode layer and the second conductive electrode layer in the elastic control unit in the tactile feedback module, the distance between the first conductive electrode layer and the second conductive electrode layer is reduced, the magnitude of the electric field force received by the columnar elastic body in the elastic control unit under the same condition is improved, the vibration strength of the columnar elastic body is improved, the tactile feedback effect of the tactile feedback module is further improved, or the driving voltage required to be applied is reduced under the condition of generating the same vibration sense, and the design of energy conservation and a driving circuit is facilitated.
In one embodiment, the first conductive electrode layer and the second conductive electrode layer in the elastic force control element are respectively connected with the first electrode leading-out terminal and the second electrode leading-out terminal.
In one embodiment, the first electrode terminal is disposed on one side of the haptic feedback module, and the second electrode terminal is disposed on the other side of the haptic feedback module.
In one embodiment, the first conductive electrode layers share a same first signal input terminal, and the second conductive electrode layers share a same second signal input terminal.
In one embodiment, the first signal input terminal is grounded, and the second signal input terminal inputs a driving signal.
In one embodiment, adjacent spring control elements are connected in an overlapping manner;
and the elastic layer in any elastic force control element is connected with the second conductive electrode layer in an overlapping mode.
In one embodiment, the columnar elastomers in the elastic layer are arranged in a uniform array.
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, wherein the columnar elastic body generates a vibration feedback under an electric field force when the haptic feedback module senses a touch pressure.
An aspect of the present application provides a keyboard, including:
the key adopts the tactile feedback module according to any one of the embodiments in the application, and is used for generating vibration feedback under the action of an electric field force when the key senses touch pressure.
Another aspect of the present application provides an electronic device, including the haptic feedback module according to any one of the embodiments of the present application, wherein the columnar elastic body generates a vibration feedback under an electric field force when the haptic feedback module senses a touch pressure.
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 diagram of a structure of a spring force control element in a haptic feedback module according to a first embodiment of the present application.
FIG. 2 is a diagram illustrating a haptic feedback module according to a second embodiment of the present application.
FIG. 3 is a schematic diagram of a haptic feedback module in a third embodiment of the present application.
FIG. 4 is a diagram illustrating a structure of a haptic feedback module according to a fourth embodiment of the present application.
FIG. 5 is a diagram illustrating driving signals of a haptic feedback module in accordance with an embodiment of the present application.
Fig. 6 a-6 c are schematic dynamic transient diagrams of the columnar elastic body under the action of the driving signal in fig. 5.
Fig. 7 is a schematic structural diagram of a keyboard 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, film or substrate is referred to as being "on" another film layer, it can be directly on the other film layer or intervening film 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 "upper" and "lower" are used herein to refer to the side of the product that is relatively close to the user as "upper" and the side that is relatively far from the user as "lower" relative to the extent to which the product 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.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present application.
Throughout the description of the present application, it is to be noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "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 "several", "stacked", "laminated", "each other" or "each other" is two or more unless otherwise specified.
One aspect of the present application provides a haptic feedback module comprising at least two stacked spring force control elements; the elastic force control element comprises a first conductive electrode layer, a base material, a second conductive electrode layer and an elastic layer which are sequentially stacked, wherein the elastic layer comprises columnar elastic bodies which are mutually independent; the elastic layers in the adjacent elastic control elements are adjacent to the first conductive electrode layer, and any elastic layer and the second conductive electrode layer and the first conductive electrode layer which are vertically adjacent to the elastic layer form an elastic control unit together. Drive signals with different polarities are respectively input to the first conductive electrode layer and the second conductive electrode layer in the elastic force control unit, so that when the touch feedback module senses touch pressure, the columnar elastic body generates vibration feedback under the action of an electric field force.
In the haptic feedback module in the above embodiment, the elastic force control element is configured to include a first conductive electrode layer, a substrate, a second conductive electrode layer, and an elastic layer, which are sequentially stacked, and at least two layers of the elastic force control elements are stacked to form the haptic feedback module, wherein the elastic layer of adjacent elastic force control elements is adjacent to the first conductive electrode layer, and any one of the elastic layers and the second conductive electrode layer and the first conductive electrode layer, which are vertically adjacent to the elastic layer, form an elastic force control unit together; the elastic layer includes columnar elastic bodies independent of each other. Because the columnar elastic body in the elastic control unit is positioned in the capacitance sensor formed between the first conductive electrode layer and the second conductive electrode layer, the advantage that the columnar elastic body can easily generate elastic deformation and generate vibration under stress is utilized, and driving signals with different polarities are respectively input into the first conductive electrode layer and the second conductive electrode layer in the elastic control unit, so that the columnar elastic body generates vibration feedback under the action of an electric field force when the touch feedback module senses touch pressure. Because a base material is saved between the first conductive electrode layer and the second conductive electrode layer in the elastic force control unit in the tactile feedback module, the distance between the first conductive electrode layer and the second conductive electrode layer is reduced, the magnitude of electric field force applied to the columnar elastic body between the first conductive electrode layer and the second conductive electrode layer under the same condition is improved, the vibration strength of the columnar elastic body is improved, and the tactile feedback effect of the tactile feedback module is further improved; or the driving voltage required to be applied is reduced under the condition of generating the same vibration sense, thereby being beneficial to energy conservation and the design of a driving circuit.
Further, in the above embodiments, the columnar elastic bodies are uniformly arranged in an array. The columnar elastic body is positioned in a capacitance sensor formed between a first conductive electrode layer and a second conductive electrode layer in the elastic force control unit. Taking the elastic body as an example of a cylindrical structure, the contact surface between the cylindrical elastic body and the upper conductive electrode layer is circular, and according to the pressure formula P ═ F/S, under the condition of the same applied force, the larger the contact surface S, the smaller the pressure P, 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 columnar elastic body is adopted, 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 intensity P is increased, the elastic body is more easily deformed, the capacitance change rate of the capacitance sensor is increased, and the pressure sensing sensitivity is improved. Therefore, the elastic layer adopts the mutually independent columnar elastic bodies, and compared with the elastic body with the whole surface, the pressure detection sensitivity of the touch feedback module is improved.
In one embodiment of the present application, a plurality of elastic force control elements are overlapped with each other to form a laminated structure, and adjacent elastic force control elements are overlapped and connected. The elastic layer in the elastic force control element is connected with the second conductive electrode layer in an overlapping mode, and the elastic layer in the elastic force control element and the second conductive electrode layer can be connected in a bonding mode through adhesive, and preferably double-faced adhesive and/or water adhesive are adopted. The adjacent elasticity control elements can be bonded by glue, preferably double-faced glue and/or water glue. The product structural design of fixed connection can avoid the product in the use vibration process, causes the product part separation and reduces the life of product, and fixed knot constructs can also strengthen the sense of shaking. In this embodiment, the user contact surface is preferably made of a non-conductive material to perform an insulation protection function, and meanwhile, the user contact surface can be separated from the outside air to prevent the electrode from being oxidized and to perform a waterproof evasion function.
In one embodiment of the present application, the first conductive electrode layer and the second conductive electrode layer in the elastic force control unit are respectively connected to the first electrode terminal and the second electrode terminal. The first electrode leading-out end is distributed on one side of the tactile feedback module, and the second electrode leading-out end is distributed on the other side of the tactile feedback module. In this embodiment, the first electrode lead and the second electrode lead may input voltages of positive and negative polarities, respectively. In other embodiments of the present application, the first electrode lead and the second electrode lead may be connected to a non-zero voltage and ground, respectively.
Further, in the haptic feedback module in the above embodiment, the first electrode terminals of the elastic force control unit may share a first signal input terminal, the second electrode terminals of the elastic force control unit may share a second signal input terminal, and the driving voltage signals with different polarities may be input into the elastic force control unit through the first signal input terminal and the second signal input terminal. Preferably, the first signal input terminal and the second signal input terminal may be connected to a non-zero voltage and ground, respectively. The design can effectively reduce the number of terminals for driving signal input, effectively reduce the process flow of the product and reduce the complexity of the product structure.
Specifically, in the haptic feedback module of the above embodiment, a first conductive electrode layer and a second conductive electrode layer in the elastic force control unit form a gap therebetweenAnd the capacitance sensor can sense the pressure signal applied to the capacitance sensor. Any one elasticity control unit in the tactile feedback module comprises a first conductive electrode layer, a second conductive electrode layer and an elastic layer positioned between the first conductive electrode layer and the second conductive electrode layer, wherein the elastic layer comprises mutually independent columnar elastic bodies, and no base material is arranged between the first conductive electrode layer and the second conductive electrode layer. Electric field force F ═ U in a capacitive sensor2*K*εr*S1)/(d2*Y*S2) Wherein U is the driving voltage applied to both ends of the product, K is the constant of the electrostatic force, ε r is the total dielectric constant of the laminated material, and S1D is the distance between two conductive electrode layers, Y is the elastic modulus of the columnar elastomer, S2The cross-sectional area of the columnar elastic body is, therefore, the magnitude of the electric field force in the capacitance sensor is inversely proportional to the square of the distance between the two conductive electrode layers. Under the same condition, if the distance between the two conductive electrode layers in the elastic force control unit can be reduced, the magnitude of the electric field force applied to the columnar elastic body in the elastic force control unit under the same condition can be effectively improved. In the embodiment of the application, a base material is omitted between the first conductive electrode layer and the second conductive electrode layer in any one of the elastic control units in the tactile feedback module, so that the distance between the two conductive electrode layers in the elastic control unit is effectively reduced, and the magnitude of the electric field force applied to the columnar elastic body in the elastic control unit under the same condition is effectively improved. Under the same condition, the vibration effect of the columnar elastic body in the elastic control unit is better, and the tactile feedback effect of the tactile feedback module is improved; the driving voltage required to be applied is reduced under the condition of generating the same vibration sense, thereby being beneficial to energy conservation and the design of a driving circuit; because the number of layers of the base material in the tactile feedback module is reduced, the thickness of the tactile feedback module is effectively reduced.
Specifically, in the haptic feedback module in the above embodiments, the columnar elastic body is located in the capacitance sensor formed between the first conductive electrode layer and the second conductive electrode layer in the elastic force control unit, and the driving signals with different polarities may be applied to the first conductive electrode layer and the second conductive electrode layer in the elastic force control unit. When the finger touches and presses the tactile feedback module for the column elastomer compression, the interval between the first conductive electrode layer in the elasticity control unit and the second conductive electrode layer diminishes, and when column elastomer deformation was the biggest, the adsorption affinity between two-layer electrode was also the biggest, and the electric field force that the column elastomer of compression received is the biggest, and the column elastomer of compression kick-backs to no compression deformation state, feeds back to this kind of sensation in hand and is tactile feedback. The keyboard using the tactile feedback module can use the tactile feedback module in one embodiment of the application as one key, and each key is respectively connected with the corresponding electrode leading-out end and used for respectively inputting driving signals with different frequencies and/or amplitudes, so that driving voltage signals with different frequencies and/or amplitudes can be input according to different experience requirements of a user in the use process of each key, and different tactile feedback effects can be obtained.
Further, in the haptic feedback module in the above embodiment, the electrode array of the first conductive electrode layer or the electrode array of the second conductive electrode layer in the elastic force control unit may be formed by a plurality of mutually independent strip electrodes, a plurality of chains connected with a plurality of electrode blocks, or mutually independent block electrodes. The orthographic projections of the electrode array of the first conductive electrode layer and the electrode array of the second conductive electrode layer in a horizontal plane have a certain area of intersection region, so that a plurality of capacitance inductors are formed.
Further, in the haptic feedback module in the above embodiments, any one of the first conductive electrode layer and the second conductive electrode layer may be made of a transparent conductive material, such as ITO, ZnO, carbon nanotube, graphene, or the like; the tactile feedback module can also be made of non-transparent conductive materials, and the size of the conductive materials is controlled so that the display content of a product using the tactile feedback module can be observed by human eyes without being influenced by the conductive electrode layers. The conductive material can be selected from silver paste, carbon paste, nano silver wire, PEDOT, carbon nanotube or graphene and other conductive materials.
Further, in the haptic feedback module in the above embodiments, the material used for the elastic layer 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. The elastic layer may be optically transparent on a macroscopic level, allowing light to pass through, and "transparent" is understood herein to mean "transparent" and "substantially transparent" without obstructing the display of the contents.
Further, in the tactile feedback module of the above embodiments, the substrate may be formed by a separate transparent or opaque film, and the film may be made of at least one of Polyimide (PI), Polyethylene terephthalate (PET), Polyethylene Naphthalate (PEN), and the like. In this embodiment, the substrate is preferably made of a flexible material.
In the haptic feedback module in the above embodiments, when the surface of the haptic feedback module is pressed by a touch, the columnar elastic body in the elastic layer generates a corresponding elastic compression according to the touch pressure information and the touch position, and when the touch pressure is removed, the elastic layer can return to the original state or return to a state close to the original state. When the tactile feedback module receives the touch pressure, at the position of the applied force, the distance between the first conductive electrode layer and the second conductive electrode layer in the elastic force control unit is reduced due to the compression of the columnar elastic body, and the reduction degree is related to the applied pressure. Therefore, when the tactile feedback module receives the touch pressure, the capacitance between the first conductive electrode layer and the second conductive electrode layer in the elastic force control unit is changed, so that the columnar elastic body in the elastic force control unit vibrates under the action of the electric field force, and a user feels the tactile feedback.
In one embodiment, an electronic device is provided that includes any of the haptic feedback modules provided in embodiments of the present application. When the touch feedback module senses the touch pressure inch, the columnar elastic body generates vibration under the action of the electric field force, so that the vibration is fed back to a user touching and pressing the key.
In one 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-down button, and the columnar elastic body generates vibration under the action of an electric field force, so that the vibration is fed back to a user touching down 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 a user can obtain different vibration feedback effects when touching and pressing different keys.
In an embodiment of the present application, a touch screen is provided, where the touch screen employs the haptic feedback module according to any embodiment of the present application, and when the touch screen senses a touch pressure, the columnar elastic body generates a vibration feedback under an effect of an electric field force.
The following description of some embodiments and the working principle of the present application will be made with reference to the accompanying drawings.
As shown in fig. 1, a schematic structural diagram of a resilient force control element 10 in a haptic feedback module is provided in an embodiment of the present application. The elastic force control element 10 includes a first conductive electrode layer 11, a substrate 12, a second conductive electrode layer 13, and an elastic layer 14, which are sequentially stacked. The substrate 12 is located between the first conductive electrode layer 11 and the second conductive electrode layer 13. The elastic layer 14 is connected to the second conductive electrode layer 13, preferably by gluing, preferably with double-sided glue and/or water glue. The elastic layer 14 includes columnar elastic bodies 141 independent of each other. The haptic feedback module is formed by overlapping at least two elastic force control elements 10 as shown in fig. 1, an elastic layer 14 of an upper elastic force control element 10 in adjacent elastic force control elements 10 in the haptic feedback module is overlapped with a first conductive electrode layer 12 of a lower elastic force control element 10, that is, the elastic layer 14 of the adjacent elastic force control element 10 is adjacent to the first conductive electrode layer 11, and any elastic layer 14 and an upper and lower adjacent second conductive electrode layer 13 and first conductive electrode layer 11 thereof jointly form an elastic force control unit. The elastic layer 14 is included between the first conductive electrode layer 11 and the second conductive electrode layer 13 in the elastic force control unit, wherein the columnar elastic body 141 in the elastic layer 14 is located in the capacitance sensor formed by the first conductive electrode layer 11 and the second conductive electrode layer 13, and the vibration intensity of the columnar elastic body in the elastic force control unit can be changed by changing the frequency and/or amplitude of the driving signal input into the elastic force control unit, so that the tactile feedback effect of the tactile feedback module is changed. When the tactile feedback module senses touch pressure, the columnar elastic body 141 generates vibration feedback under the action of an electric field force by applying driving signals with different polarities to the first conductive electrode layer 11 and the second conductive electrode layer 13 in the elastic control unit in the tactile feedback module respectively.
Fig. 2 is a schematic structural diagram of a haptic feedback module provided in an embodiment of the present application. The haptic feedback module includes at least two stacked layers of the spring force control element 10 as shown in fig. 1. The elastic force control element 10 includes a first conductive electrode layer 11, a substrate 12, a second conductive electrode layer 13, and an elastic layer 14, which are sequentially stacked. The elastic layer 14 of any one of the elasticity control elements 10 is connected to the second conductive electrode layer 13, preferably by bonding, which may be double-sided adhesive and/or water-gel bonding. The elastic layer 14 includes columnar elastic bodies 141 independent of each other. The elastic layer 14 of the adjacent elastic force control element 10 is adjacent to the first conductive electrode layer 11, and an elastic force control unit 20 is formed by any one of the elastic layers 14 and the second conductive electrode layer 13 and the first conductive electrode layer 11 which are adjacent to each other up and down. The columnar elastic body 141 in the elastic layer 14 in the haptic feedback module is located in the capacitive sensor formed by the first conductive electrode layer 11 and the second conductive electrode layer 13 in the elastic force control element 10. By applying driving signals with different polarities to the first conductive electrode layer 11 and the second conductive electrode layer 13 in the haptic feedback module, the columnar elastic body 141 generates vibration feedback under the action of an electric field force when the haptic feedback module senses a touch pressure.
In the haptic feedback module in the above embodiment, since only the elastic layer is included between the first conductive electrode layer and the second conductive electrode layer in the elastic force control unit, a substrate is prevented from being introduced between the first conductive electrode layer and the second conductive electrode layer, and the distance between the first conductive electrode layer and the second conductive electrode layer is effectively reduced. Because the square value of the interval is in inverse proportion to the electric field force in the capacitance sensor formed between the first conductive electrode layer and the second conductive electrode layer, the interval is reduced, the electric field force in the capacitance sensor under the same condition can be effectively improved, the vibration effect of the columnar elastic body in the capacitance sensor is improved, and the touch feedback effect of the touch feedback module is further improved. The multi-layer lamination design of the tactile feedback module enables the vibration of the columnar elastic bodies in the multi-layer elastic layers to be mutually superposed, so that a resonance effect can be generated, and the tactile feedback effect of the tactile feedback module is further improved; or the driving voltage required to be applied is reduced under the condition of generating the same vibration sense, thereby being beneficial to energy conservation and the design of a driving circuit. The thickness of the product is effectively reduced due to the fact that the number of layers of the base materials is reduced in the tactile feedback module.
Fig. 3 is a schematic structural diagram of a haptic feedback module according to an embodiment of the present application, which is different from the haptic feedback module shown in fig. 2 in that a first conductive electrode layer 11 of an elastic force control unit 20 is connected to a first electrode terminal 15, and a second conductive electrode layer 13 of the elastic force control unit 20 is connected to a second electrode terminal 16. The first electrode lead 15 is disposed on one side of the haptic feedback module and the second electrode lead 16 is disposed on the other side of the haptic feedback module. In the present embodiment, the first electrode lead 15 and the second electrode lead 16 may input voltages of positive and negative polarities, respectively. In other embodiments of the present application, the first electrode lead 15 and the second electrode lead 16 may be connected to a non-zero voltage and ground, respectively.
In the tactile feedback module in the above embodiment, since the first conductive electrode layer in the elastic force control unit is connected to the first electrode lead-out terminal, the second conductive electrode layer in the elastic force control unit is connected to the second electrode lead-out terminal, and the first electrode lead-out terminal and the second electrode lead-out terminal are located at two sides of the tactile feedback module respectively, it is convenient to input driving signals with different polarities into the tactile feedback module through the first electrode lead-out terminal and the second electrode lead-out terminal, so that the cylindrical elastic body in the elastic force control unit is located in the capacitive sensor formed between the first conductive electrode layer 11 and the second conductive electrode layer 13 in the elastic force control unit 20, and the cylindrical elastic body 141 in the elastic force control unit 20 vibrates under the action of an electric field force, thereby generating the tactile feedback effect. The vibration effects of the columnar elastomers in the multiple layers of elastic layers are mutually superposed, so that a resonance effect can be generated, and the tactile feedback effect of the tactile feedback module is further improved.
Fig. 4 is a schematic structural diagram of a haptic feedback module according to an embodiment of the present application, which is different from the haptic feedback module shown in fig. 3 in that the first conductive electrode layers of the elastic force control unit share the same first signal input terminal 21, and the second conductive electrode layers of the elastic force control element share the same second signal input terminal 22. The first signal input terminal 21 and the second signal input terminal 22 are used for inputting driving signals with different polarities. In the embodiment of the present application, it is preferable that the second signal input terminal 22 is input with a non-zero signal, and the first signal input terminal 21 is grounded.
In the haptic feedback module in the above embodiment, since the first conductive electrode layers in the elastic force control unit share the same first signal input terminal and the second conductive electrode layers in the elastic force control unit share the same second signal input terminal, the driving signal can be input into the elastic force control unit through the first signal input terminal and the second signal input terminal, and the vibration intensity of the columnar elastic body in the elastic force control unit can be changed by changing the frequency and/or amplitude of the driving signal input into the elastic force control unit, so as to change the haptic feedback effect of the haptic feedback module. The vibration effects of the columnar elastomers in the multiple layers of elastic layers are mutually superposed, so that a resonance effect can be generated, and the tactile feedback effect of the tactile feedback module is further improved.
Further, in the haptic feedback module of the above embodiment, the adjacent elastic force control elements are overlapped and connected to form a fixed integral structure. Adjacent spring force control elements may be bonded with glue, preferably double sided glue and/or water glue. The design of a fixed integral structure can avoid the product from separating parts and shortening the service life of the product in the use vibration process, and the fixed structure can also enhance the vibration sense. In this embodiment, the touch feedback module preferably uses a non-conductive material for the contact surface with the user, so as to perform an insulation protection function, and simultaneously, the touch feedback module can be separated from the outside air, thereby preventing the electrode from being oxidized, and performing a waterproof evasion function.
Fig. 5 is a schematic diagram of driving voltage signals provided in an embodiment of the present application. The first signal input terminal is grounded by inputting a driving voltage signal as shown in fig. 5 to the second signal input terminal as shown in fig. 4. The driving voltage signal illustrated in fig. 5 is a unipolar triangular wave periodic signal, and the frequency may be about 20Hz to 200Hz, which is a frequency simulating the use of a conventional keyboard, such as a mechanical keyboard. The driving voltage signal shown in fig. 5 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 times of the sampling points are respectively recorded as T1, T2, T3 and T4.
Fig. 6a, fig. 6b and fig. 6c are schematic dynamic transient diagrams of the columnar elastic body under the action of the driving signal in fig. 5. FIG. 6a illustrates an initial state of a columnar elastic body; FIG. 6b is a schematic diagram showing the maximum elastic deformation of the cylindrical elastic body when the maximum electric field force is applied to the cylindrical elastic body; fig. 6c shows that the electric field force gradually decreases and the columnar elastic body slowly rebounds to the original state by virtue of the rebound force of the columnar elastic body. The operation of the haptic feedback module in the embodiment of the present application is briefly described below with reference to fig. 6a, 6b and 6 c.
During the T1-T2 state: at time T1, the columnar elastic body is in the form shown in fig. 6a and is not deformed to the original state; at the time of T1-T2, the electric field force is gradually increased, the electrostatic adsorption force between the two conductive electrode layers is gradually increased, and gradually increased electric field acting force is generated on the columnar elastic body; at time T2, the electric field force is maximized, the adsorption force between the two conductive electrode layers is also maximized, and the deformation amount of the columnar elastic body is also maximized, as shown in fig. 6 b.
During the T2-T3 state: at the time from T2 to T3, the electric field force is gradually reduced, the adsorption force between the two conductive electrode layers is also gradually reduced, and the columnar elastic body slowly rebounds according to the self rebounding force; when the driving signal is at time T3, the cylindrical elastic body rebounds to the original state, as shown in fig. 6 c.
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 two conductive electrode layers, so there is no electrostatic adsorption force, and the columnar elastic body maintains the original state.
The driving signal includes a periodic variation as shown between the time points T1-T4, the frequency of the driving signal shown in fig. 5 is preferably 50Hz, and in one embodiment, the frequency of the input signal may be 20Hz-200Hz, and the driving signal with different frequencies may be input according to different user requirements. For example, if the user wants to experience a stronger vibration sensation, the signal frequency or amplitude may be increased. The input signal changes periodically, the columnar elastic body changes periodically from 0 deformation amount to the maximum deformation amount all the time, and the feeling fed back to the hand of the user is tactile feedback.
FIG. 7 is a diagram illustrating a keyboard in an embodiment of the present invention, wherein a single key may employ the haptic feedback module shown in FIG. 4. As shown in fig. 7, each key 40 is connected to a corresponding signal input terminal, and different driving signals are input, so that in the using process of each key, driving voltage signals with different frequencies and/or amplitudes can be input according to different requirements of a user, so as to obtain different haptic feedback effects.
In the haptic feedback module in the above embodiments, the first conductive electrode layer and/or the second conductive electrode layer may be fabricated on a transparent or opaque substrate, such as a thin film material of Polyethylene terephthalate (PET), Polycarbonate (PC), or glass, by sputtering, evaporation, printing, and 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.
According to the elastic control unit, the elastic control elements are arranged to be in a form of a first conductive electrode layer, a base material, a second conductive electrode layer and an elastic layer which are sequentially stacked, and at least two layers of elastic control elements are stacked to form the touch feedback module, wherein the elastic layer in the adjacent elastic control elements is adjacent to the first conductive electrode layer, and any elastic layer and the second conductive electrode layer and the first conductive electrode layer which are vertically adjacent to the elastic layer form the elastic control unit together. Because the columnar elastic body is positioned in the capacitance sensor formed between the first conductive electrode layer and the second conductive electrode layer in the elastic control unit, driving signals with different polarities are respectively input into the first conductive electrode layer and the second conductive electrode layer in the elastic control unit, so that the columnar elastic body generates vibration feedback under the action of an electric field force when the touch feedback module senses touch pressure. Because the base material is saved between the first conductive electrode layer and the second conductive electrode layer in the elastic control unit in the tactile feedback module, the distance between the first conductive electrode layer and the second conductive electrode layer in the elastic control unit is reduced, the magnitude of the electric field force applied to the columnar elastic body in the elastic control unit under the same condition is improved, the vibration strength of the columnar elastic body is improved, and the tactile feedback effect of the tactile feedback module is further improved. The tactile feedback module adopts a multilayer laminated design, and the vibration effects of the columnar elastomers in the multilayer elastic layers are mutually superposed, so that a resonance effect can be generated, and the tactile feedback effect of the tactile feedback module is further improved; the driving voltage required to be applied is reduced under the condition of generating the same vibration sense, thereby being beneficial to energy conservation and the design of a driving circuit; the number of layers of the base material is reduced, so that the thickness of the product is effectively reduced.
Adopt the keyboard of tactile feedback module in this application embodiment, overturned the structural design of traditional button keyboard, have thickness thin, can buckle, do not have button clearance, the appearance is pleasing to the eye, a great deal of advantages such as tactile feedback is effectual.
In an embodiment of this application, the electronic device that provides can be for intelligent wrist-watch, cell-phone camera, panel computer camera, electron skin and intelligent wearing equipment etc. adopt the electronic device of tactile feedback module in this application embodiment, have better tactile feedback effect.
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 (10)
1. A haptic feedback module comprising at least two stacked layers of spring force control elements;
the elastic force control element comprises a first conductive electrode layer, a base material, a second conductive electrode layer and an elastic layer which are sequentially stacked, wherein the elastic layer comprises columnar elastic bodies which are mutually independent;
the elastic layers in the adjacent elastic control elements are adjacent to the first conductive electrode layer, and any elastic layer and the second conductive electrode layer and the first conductive electrode layer which are vertically adjacent to the elastic layer form an elastic control unit together;
drive signals with different polarities are respectively input to a first conductive electrode layer and a second conductive electrode layer in the elastic force control unit, so that when the touch feedback module senses touch pressure, the columnar elastic body generates vibration feedback under the action of an electric field force.
2. A haptic feedback module as recited in claim 1 wherein said first and second conductive electrode layers of said spring force control element are connected to said first and second electrode terminals, respectively.
3. A haptic feedback module as recited in claim 2 wherein said first electrode lead is disposed on one side of said haptic feedback module and said second electrode lead is disposed on another side of said haptic feedback module.
4. A haptic feedback module as recited in claim 1 wherein said first conductive electrode layers share a same first signal input and said second conductive electrode layers share a same second signal input.
5. A haptic feedback module as recited in claim 4 wherein said first signal input is coupled to ground and said second signal input inputs a drive signal.
6. A haptic feedback module according to any one of claims 1-5, wherein:
the adjacent elastic force control elements are connected in an overlapped mode;
and the elastic layer in any elastic force control element is connected with the second conductive electrode layer in an overlapping mode.
7. A haptic feedback module as recited in any of claims 1-5 wherein said columnar elastic bodies in said elastic layer are arranged in a uniform array.
8. A touch screen, comprising:
the haptic feedback module of any of claims 1-7, wherein the columnar elastic body generates a vibration feedback under an electric field force when the haptic feedback module senses a touch pressure.
9. A keyboard, comprising:
the key adopts the tactile feedback module according to any one of claims 1-7, and is used for generating vibration feedback under the action of an electric field force when the key senses touch pressure.
10. An electronic device, comprising:
the haptic feedback module of any of claims 1-7, wherein the columnar elastic body generates a vibration feedback under an electric field force when the haptic feedback module senses a touch pressure.
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| WO2023092540A1 (en) * | 2021-11-29 | 2023-06-01 | 京东方科技集团股份有限公司 | Tactile feedback panel, tactile feedback method therefor, and tactile feedback device therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023092540A1 (en) * | 2021-11-29 | 2023-06-01 | 京东方科技集团股份有限公司 | Tactile feedback panel, tactile feedback method therefor, and tactile feedback device therefor |
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Application publication date: 20210514 |