CN213814598U - 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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- CN213814598U CN213814598U CN202021944663.6U CN202021944663U CN213814598U CN 213814598 U CN213814598 U CN 213814598U CN 202021944663 U CN202021944663 U CN 202021944663U CN 213814598 U CN213814598 U CN 213814598U
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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 mutually-overlapped elastic force control elements, and each elastic force control element comprises an electrode layer and a dielectric elastomer layer which are mutually overlapped; the electrode layer of one of the adjacent elasticity control elements is adjacent to the dielectric elastomer layer of the other elasticity control element; wherein a plurality of colloidal microspheres are disposed in the dielectric elastomer layer; by applying voltage signals with different polarities to the electrode layers in the adjacent elastic force control elements, when the tactile feedback module senses touch pressure, the dielectric elastomer layer generates vibration feedback under the action of an electric field force. Due to the fact that the plurality of colloid microspheres are added in the dielectric elastomer layer, the elastic modulus of the dielectric elastomer layer is reduced, and the dielectric elastomer layer can generate large deformation vibration under small touch pressure.
Description
Technical Field
The application relates to the technical field of touch control, in particular to a touch 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, in the conventional touch screen or keyboard, the touch feedback effect of each key is the same, and people can generally determine whether the input action is completed only by watching the input content. If the tactile feedback effect of the key can be increased, on one hand, the user can judge whether the input action is finished only through the tactile feedback effect of the key, and on the other hand, the interaction performance of the user and the keyboard can be improved. For example, if a user can obtain different haptic feedback effects when touching and pressing different keys of the touch panel, user experience can be effectively improved.
Also, the conventional haptic feedback technology generally requires a sound to be emitted by means of a sound part or vibration to be generated by means of a vibration motor so that a user feels the haptic feedback. However, the existing touch screen or keyboard is developed towards light weight, portability and simplification, and the volume and weight of the product are increased due to the addition of too many parts; the difficulty of product design is increased, and the reject ratio of the product is improved; in addition, the addition of energy consuming components means an increase in energy consumption, which is not favorable for energy saving design of electronic products.
SUMMERY OF THE UTILITY MODEL
Based on this, there is a need for a haptic feedback module, a touch screen, a keyboard and an electronic device capable of providing haptic feedback effects to a user.
One aspect of the present application provides a haptic feedback module including at least two resilient force control elements stacked on each other,
the elasticity control element comprises an electrode layer and a dielectric elastomer layer which are overlapped with each other;
the electrode layer of one of the adjacent elasticity control elements is adjacent to the dielectric elastomer layer of the other elasticity control element;
the dielectric elastomer layer is provided with a plurality of colloid microspheres, and voltage signals with different polarities are applied to electrode layers in adjacent elastic force control elements, so that the dielectric elastomer layer generates vibration feedback under the action of an electric field force.
In the haptic feedback module of the above embodiment, a plurality of elastic force control elements are stacked on each other, and each elastic force control element includes an electrode layer and a dielectric elastomer layer stacked on each other; the adjacent electrode layers and the dielectric elastomer layer are mutually overlapped, the adjacent electrode layers comprise the dielectric elastomer layer, and a plurality of colloid microspheres are arranged in the dielectric elastomer layer. By applying voltage signals with different polarities to the electrode layers in the adjacent elastic force control elements, when the tactile feedback module senses touch pressure, the dielectric elastomer layer generates vibration feedback under the action of an electric field force. Because a plurality of colloid microspheres are additionally arranged in the dielectric elastomer layer, when voltage is applied between adjacent electrode layers to form an electric field force to generate pressure on the dielectric elastomer layer, the dielectric elastomer layer is easily compressed, the dielectric elastomer layer can recover to the original shape and volume after the pressure is released, the elastic modulus of the dielectric elastomer layer is reduced, the dielectric elastomer layer can be easily elastically deformed under stress, and the voltage required by the deformation of the dielectric elastomer layer is reduced; the dielectric elastomer layer can generate larger deformation vibration under smaller touch pressure. The different dielectric elastomer layers vibrate simultaneously, a resonance effect can be generated, the sensitivity of the touch feedback module to the touch pressure sensing is improved, and a user can feel strong touch feedback vibration sense under small touch pressure.
In one embodiment, the colloidal microspheres include a shell and a fluid encapsulated by the shell, so that the colloidal microspheres can deform under pressure and can recover to the original shape and volume after the pressure is released, thereby effectively reducing the elastic modulus of the dielectric elastomer layer, and enabling the dielectric elastomer layer to easily deform under the action of force. The colloid microspheres and the preparation material of the dielectric elastomer layer can be uniformly mixed and then uniformly coated on the surface of the electrode layer to form the dielectric elastomer layer, so that the colloid microspheres are uniformly distributed in the dielectric elastomer layer, and the process difficulty and the preparation cost of the dielectric elastomer layer are reduced.
In one embodiment, the shell is a thermoplastic polymer shell, so that the difficulty and cost of the preparation process of the colloidal microspheres are reduced.
In one embodiment, the fluid includes polydimethylsiloxane and/or polystyrene, so as to reduce the difficulty and cost of the preparation process of the colloidal microspheres and effectively improve the working stability of the colloidal microspheres.
In one embodiment, the maximum diameter of the colloidal microspheres is 1-30 μm, so that the product volume requirement is met while the strength and sensitivity requirements of the tactile feedback vibration are met.
In one embodiment, the number of the elastic force control elements is 2-40, so as to meet the requirement of the number of the touch keys, and different keys can be configured to have different tactile feedback effects.
In one embodiment, the voltage signal is a triangular wave voltage, so that the dielectric elastomer layer generates vibration feedback under the action of the electric field force.
An aspect of the present application provides a touch screen, including:
the haptic feedback module according to any of the embodiments of the present application, configured to generate a vibration feedback by the dielectric elastomer layer under an electric field force when the touch screen senses a touch pressure.
An aspect of the present application provides a keyboard, including:
according to any one of the embodiments of the present application, the tactile feedback module is used for a key, and when the key senses a touch pressure, the dielectric elastomer layer generates a vibration feedback under the action of an electric field force.
An aspect of the present application provides an electronic apparatus, including:
a haptic feedback module according to any of the embodiments described herein.
In the touch screen, the keyboard or the electronic device in the above embodiments, the dielectric elastomer layer generates vibration feedback under the action of the electric field force when the tactile feedback module senses the touch pressure by applying voltage signals with different polarities to the electrode layers in the adjacent elastic force control elements. Because a plurality of colloid microspheres are additionally arranged in the dielectric elastomer layer, when voltage is applied between adjacent electrode layers to form an electric field force to generate pressure on the dielectric elastomer layer, the dielectric elastomer layer is more easily compressed, the dielectric elastomer layer can recover to the original shape and volume after the pressure is released, the elastic modulus of the dielectric elastomer layer is reduced, the dielectric elastomer layer can be easily elastically deformed under stress, and the voltage required by the deformation of the dielectric elastomer layer is reduced; the dielectric elastomer layer can generate larger deformation vibration under smaller touch pressure. The different dielectric elastomer layers vibrate simultaneously, a resonance effect can be generated, the sensitivity of the touch feedback module to the touch pressure sensing is improved, and a user can feel strong touch feedback vibration sense under small 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 structural diagram of a haptic feedback module provided in an embodiment of the present application.
FIG. 2 is a diagram illustrating driving voltages of a haptic feedback module according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a keyboard provided in an embodiment of the present application.
Fig. 4 is a schematic structural diagram of an electronic device 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, 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.
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.
In one embodiment of the present application, a haptic feedback module is provided, comprising at least two elastic force control elements stacked on each other, the elastic force control elements comprising an electrode layer and a dielectric elastomer layer stacked on each other; the electrode layer of one of the adjacent elasticity control elements is adjacent to the dielectric elastomer layer of the other elasticity control element; wherein a plurality of colloidal microspheres are disposed in the dielectric elastomer layer; by applying voltage signals with different polarities to the electrode layers in the adjacent elastic force control elements, when the tactile feedback module senses touch pressure, the dielectric elastomer layer generates vibration feedback under the action of an electric field force.
Specifically, in the haptic feedback module in the above embodiment, by providing a plurality of elastic force control elements stacked on each other, each elastic force control element includes an electrode layer and a dielectric elastomer layer stacked on each other; the adjacent electrode layers and the dielectric elastomer layer are mutually overlapped, the adjacent electrode layers comprise the dielectric elastomer layer, and a plurality of colloid microspheres are arranged in the dielectric elastomer layer. By applying voltage signals with different polarities to the electrode layers in the adjacent elastic force control elements, when the tactile feedback module senses touch pressure, the dielectric elastomer layer generates vibration feedback under the action of an electric field force. Because a plurality of colloid microspheres are additionally arranged in the dielectric elastomer layer, when voltage is applied between adjacent electrode layers to form an electric field force to generate pressure on the dielectric elastomer layer, the dielectric elastomer layer is more easily compressed, the dielectric elastomer layer can recover to the original shape and volume after the pressure is released, the elastic modulus of the dielectric elastomer layer is reduced, the dielectric elastomer layer can be easily elastically deformed under stress, and the voltage required by the deformation of the dielectric elastomer layer is reduced; the dielectric elastomer layer can generate larger deformation vibration under smaller touch pressure. The different dielectric elastomer layers vibrate simultaneously, a resonance effect can be generated, the sensitivity of the touch feedback module to the touch pressure sensing is improved, and a user can feel strong touch feedback vibration sense under small touch pressure.
More specifically, in the haptic feedback module of the above embodiment, the colloidal microspheres include a shell and a fluid enclosed by the shell, so that the colloidal microspheres can deform under pressure and can recover to the original shape and volume after pressure is released, thereby effectively reducing the elastic modulus of the dielectric elastomer layer, and enabling the dielectric elastomer layer to easily deform under a force. The colloid microspheres and the preparation material of the dielectric elastomer layer can be uniformly mixed and then uniformly coated on the surface of the electrode layer to form the dielectric elastomer layer, so that the colloid microspheres are uniformly distributed in the dielectric elastomer layer, and the process difficulty and the preparation cost of the dielectric elastomer layer are effectively reduced.
Preferably, in an embodiment of the present application, the fluid includes polydimethylsiloxane and/or polystyrene, so as to reduce difficulty and cost of a preparation process of the colloidal microspheres and effectively improve working stability of the colloidal microspheres.
Preferably, in an embodiment of the present application, the maximum diameter of the colloidal microspheres is 1 μm to 30 μm, which meets the volume requirement of the product while meeting the strength and sensitivity requirement of the haptic feedback vibration.
Further, in a haptic feedback module provided in an embodiment of the present application, the haptic feedback module is formed by stacking 40 elastic force control elements, wherein adjacent electrode layers and dielectric elastomer layers are stacked on each other, the adjacent electrode layers include a dielectric elastomer layer, a plurality of colloid microspheres are disposed in the dielectric elastomer layer, the dielectric elastomer layer is configured to sense a touch-control inch in a touch-control feedback module, and the dielectric elastomer layer generates vibration under an electric field force, so that the vibration is fed back to a user who touches the touch-control feedback module. In this embodiment, an electrode layer may be formed on the surface of a large screen or a steel plate by printing or direct coating, and then an elastic material mixed with colloidal microspheres is coated on the surface of the electrode layer to form a dielectric elastomer layer and form an elasticity control element, for example, the thickness of the dielectric elastomer layer may be 10 μm to 100 μm, and the thickness of the electrode layer may be 0.1 μm to 10 μm.
In the haptic feedback module in the above embodiment, for example, 40 elastic force control elements may be stacked together to form the haptic feedback module, each elastic force control element includes an electrode layer and a dielectric elastomer layer stacked together, and the dielectric elastomer layer has a plurality of colloid microspheres disposed therein; the electrode layer of one of the adjacent spring force control elements is adjacent to the dielectric elastomer layer of the other spring force control element. By applying voltage signals with different polarities to the electrode layers in the adjacent elastic force control elements, when the tactile feedback module senses touch pressure, the dielectric elastomer layer generates vibration feedback under the action of an electric field force. Because a plurality of colloid microspheres are added in the dielectric elastomer layer, the elastic modulus of the dielectric elastomer layer is reduced, so that the dielectric elastomer layer can be easily elastically deformed under stress, and the voltage required by the deformation of the dielectric elastomer layer is reduced; the dielectric elastomer layer can generate larger deformation vibration under smaller touch pressure. The sensitivity of the touch feedback module to the touch pressure sensing is improved, so that a user can feel stronger touch feedback vibration sense under smaller touch pressure. The vibration effects in the different dielectric elastomer layers are mutually superposed to generate a resonance effect so as to enhance the touch feedback effect felt by a user of the touch feedback module. Moreover, the thickness of the tactile feedback module comprising 40 elastic force control elements which are overlapped with each other can meet the requirement of common electronic products on the thickness of the tactile feedback module.
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 a touch control inch on the touch screen, where the dielectric elastomer layer generates vibration under an electric field force, so that the vibration is fed back to a user touching the touch screen.
In particular, the electrode layer may be constituted by an electrode array. The electrode array of the 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 electrode layers on the surface of the dielectric elastomer layer has a certain area of intersection region, so that a plurality of elastic force control regions are formed.
Further, in the above embodiments, the dielectric elastomer layer is optically transparent in macroscopic view, so as to allow light to pass through, and "transparent" can 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. The elastic material of the dielectric elastomer layer may be made of silica gel, rubber, acrylic gel, sol, or the like.
Further, in the above embodiments, the 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 electrode layers. The conductive material can be selected from silver paste, carbon paste, nano silver wire, PEDOT, carbon nanotube, graphene conductive and other conductive materials.
In an embodiment of the present application, a keyboard includes any of the tactile feedback modules described in the embodiments of the present application, where the tactile feedback module is used for a key, and when the key senses a touch button, the dielectric elastomer layer 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 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, there is provided a haptic feedback module comprising a plurality of resilient control elements stacked on top of each other; each elasticity control element comprises an electrode layer 10 and a dielectric elastomer layer 20 which are overlapped with each other, and a plurality of colloid microspheres 21 are arranged in the dielectric elastomer layer 20; wherein, the electrode layer 10 of one of the adjacent elasticity control elements is adjacent to the dielectric elastomer layer 20 of the other elasticity control element, so that the dielectric elastomer layer 20 is included between any two adjacent electrode layers 10. By applying voltage signals with different polarities to the adjacent electrode layers 10, when the touch feedback module senses a touch control inch, the dielectric elastomer layer 20 generates vibration feedback under the action of an electric field force, so that the vibration is fed back to a user of the touch feedback module.
Specifically, with continued reference to fig. 1, the plurality of colloidal microspheres 21 in the dielectric elastomer layer 20 may be disposed in a uniform arrangement or a non-uniform arrangement, and the thickness of the dielectric elastomer layer may be 10 μm to 100 μm.
By way of example, with continued reference to fig. 1, the colloidal microspheres 21 include a shell and a fluid encapsulated by the shell, such that the colloidal microspheres deform under pressure and return to their original shape and volume after the pressure is released, thereby effectively reducing the elastic modulus of the dielectric elastomer layer and allowing it to easily deform under force. The colloid microspheres and the preparation material of the dielectric elastomer layer can be uniformly mixed and then uniformly coated on the surface of the electrode layer to form the dielectric elastomer layer, so that the colloid microspheres are uniformly distributed in the dielectric elastomer layer, and the process difficulty and the preparation cost of the dielectric elastomer layer are effectively reduced.
As an example, referring to fig. 1, the fluid in the colloidal microspheres 21 includes polydimethylsiloxane and/or polystyrene, so as to reduce the difficulty and cost of the preparation process of the colloidal microspheres and effectively improve the working stability of the colloidal microspheres.
By way of example, with continued reference to fig. 1, the maximum diameter of the colloidal microspheres 21 is 1 μm to 30 μm, for example, the maximum diameter of the colloidal microspheres 21 may be 1 μm, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm or 30 μm, which meets the volume requirement of the product while meeting the strength and sensitivity requirements of the haptic feedback vibration.
In the above embodiment, since the plurality of colloid microspheres are added to the dielectric elastomer layer, the elastic modulus of the dielectric elastomer layer is reduced, so that the dielectric elastomer layer can be easily elastically deformed under stress, thereby reducing the voltage required for deformation of the dielectric elastomer layer; the dielectric elastomer layer can generate larger deformation vibration under smaller touch pressure. The sensitivity of the touch feedback module to the touch pressure sensing is improved, so that a user can feel stronger touch feedback vibration sense under smaller touch pressure. The vibration effects in the different dielectric elastomer layers are mutually superposed to generate a resonance effect so as to enhance the touch feedback effect felt by a user of the touch feedback module.
In the above embodiment, since the elastic material mixed with a plurality of colloidal microspheres can be directly coated on the surface of the electrode layer to form the dielectric elastomer layer, the process flow can be effectively simplified, and the production cost can be reduced; and the base material is saved, and the light weight of the product is facilitated. This application is for addding the porous dielectric elastomer layer of a plurality of micropores, and the mechanical properties that has avoided the hole inequality in the porous dielectric elastomer layer to cause reduces and tired soft when kick-backing to avoid the micropore in the porous dielectric elastomer layer to extend to the outside surface on dielectric elastomer layer, cause bad influence to the whole mechanical properties on dielectric elastomer layer. And the porous dielectric elastomer layer is generally formed by foaming the formed dielectric elastomer layer, so that compared with the application which can directly form the dielectric elastomer layer with a plurality of colloidal microspheres by a coating mode, the process flow is obviously more complicated, and the overall mechanical property of the prepared porous dielectric elastomer layer is obviously poorer than that of the dielectric elastomer layer with a plurality of colloidal microspheres in the application.
Specifically, in the haptic feedback module in the above embodiment, 40 elastic force control elements stacked on each other may be disposed, wherein adjacent electrode layers and dielectric elastomer layers are stacked on each other, each elastic force control element includes an electrode layer 10 and a dielectric elastomer layer 20 stacked on each other, and a plurality of colloid microspheres 21 are disposed in the dielectric elastomer layer 20; the adjacent electrode layers 10 and the dielectric elastomer layers 20 are stacked on each other, and the dielectric elastomer layer 20 is included between the adjacent electrode layers 10. By applying voltage signals with different polarities to the adjacent electrode layers 10, when the touch feedback module senses a touch control inch, the dielectric elastomer layer 20 generates vibration feedback under the action of an electric field force, so that the vibration is fed back to a user of the touch feedback module.
In the embodiment, the plurality of colloid microspheres are added in the dielectric elastomer layer, so that the elastic modulus of the dielectric elastomer layer is reduced, the dielectric elastomer layer can be easily elastically deformed under stress, and the voltage required by the deformation of the dielectric elastomer layer is reduced; the dielectric elastomer layer can generate larger deformation vibration under smaller touch pressure. The sensitivity of the touch feedback module to the touch pressure sensing is improved, so that a user can feel stronger touch feedback vibration sense under smaller touch pressure. Because the tactile feedback module comprises 40 elastic force control elements which are overlapped with each other, the vibration between the dielectric elastomer layers of each elastic force control element can be overlapped with each other, and even can generate a resonance effect, so that the sensitivity of the tactile feedback module on the touch pressure sensing is further improved, and a user can feel stronger tactile feedback vibration sense under smaller touch pressure. Moreover, the thickness of the tactile feedback module comprising 40 elastic force control elements which are overlapped with each other can meet the requirement of common electronic products on the thickness of the tactile feedback module.
Further, in the haptic feedback module of the above embodiment, voltage signals with different polarities, for example, voltage signals with opposite polarities, are input to the adjacent electrode layers to generate an electric field force on the dielectric elastomer layer between the adjacent electrode layers, and when the haptic feedback module senses a touch pressure inch, the dielectric elastomer layer vibrates under the action of the electric field force. The vibration effects in the different dielectric elastomer layers are mutually superposed to generate a resonance effect so as to enhance the touch feedback effect felt by a user of the touch feedback module.
Further, in the haptic feedback module in the above embodiment, the input voltage driving signal to the adjacent electrode layer is a triangular wave periodic signal. The driving signal illustrated in fig. 2 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 input signal in fig. 2 is divided into four different control sampling points in one period, the working states of the touch feedback module under different driving voltages are briefly described at the different control sampling points, and the sampling times 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. 2:
during the T1-T2 state: at time T1, the input voltage is 0, and the dielectric elastomer layer 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 electrode layers gradually increases, the electrostatic adsorption force between the adjacent electrode layers gradually increases, and a gradually increasing electric field acting force is generated on the dielectric elastomer layer between the two electrode layers; at time T2, the input voltage reaches a maximum value, the electric field force between the adjacent electrode layers is maximized, the adsorption force between the adjacent electrode layers is maximized, and the amount of deformation of the dielectric elastomer layer between the adjacent electrode layers is maximized.
During the T2-T3 state: at the time of T2 to T3, the input voltage gradually decreases, the electric field force between the adjacent electrode layers gradually decreases, the adsorption force between the adjacent electrode layers also gradually decreases, and the dielectric elastomer layer between the adjacent electrode layers gradually performs a rebound action according to the self rebound force; at time T3, when the input voltage is 0, the dielectric elastomer layer between the adjacent electrode layers springs back to its original state.
During the T3-T4 state: at time T3 to time T4, the drive input signal is substantially 0, and since there is substantially no electric field force acting between the adjacent electrode layers, there is no electrostatic attraction force, and the dielectric elastomer layer between the adjacent electrode layers remains in 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. 2 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 dielectric elastomer layer 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 touch 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 dielectric elastomer layer 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. 3, each key may employ a haptic feedback module as shown in FIG. 1, respectively. For example, if the user wants to improve the touch feedback effect of the "Enter" key, the frequency and/or amplitude of the driving voltage signal applied to the haptic feedback module 30 of the key can be increased, so that the user can feel a stronger touch feedback effect when pressing the "Enter" key.
In an embodiment of the present application, a touch screen device is provided, including any of the touch feedback modules provided in the embodiments of the present application, configured to sense a touch inch on a touch screen, where the dielectric elastomer layer generates vibration under an electric field force, so that the vibration is fed back to a user of the touch screen.
Specifically, a touch feedback module may be used for a touch screen device, and by setting an electrode array of an electrode layer, for example, the electrode layer may include a plurality of mutually independent strip electrodes, or a plurality of chains connected with a plurality of electrode blocks, or mutually independent block electrodes, and orthogonal projections of the electrode arrays of adjacent electrode layers on the surface of the dielectric elastomer layer have a cross region with a certain area, 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 disclosure, the 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 electrode layer may be obtained by etching an Indium tin oxide film (ITO film), screen printing conductive paste on PET, or by using a Metal wire mesh process.
The application provides a tactile feedback module, which is characterized in that a plurality of mutually overlapped elastic control elements are arranged, and each elastic control element comprises an electrode layer and a dielectric elastomer layer which are mutually overlapped; the adjacent electrode layers and the dielectric elastomer layer are overlapped with each other, and the dielectric elastomer layer is arranged between the adjacent electrode layers. By applying voltage signals with different polarities to the electrode layers in the adjacent elastic force control elements, when the tactile feedback module senses touch pressure, the dielectric elastomer layer generates vibration feedback under the action of an electric field force. Because a plurality of colloid microspheres are added in the dielectric elastomer layer, the elastic modulus of the dielectric elastomer layer is reduced, so that the dielectric elastomer layer can be easily elastically deformed under stress, and the voltage required by the deformation of the dielectric elastomer layer is reduced; the dielectric elastomer layer can generate larger deformation vibration under smaller touch pressure. The sensitivity of the touch feedback module to the touch pressure sensing is improved, so that a user can feel stronger touch feedback vibration sense under smaller touch pressure.
Referring to fig. 4, an electronic device provided in an embodiment of the present application includes a haptic feedback module as described in any of the embodiments of the present application. By applying voltage signals with different polarities to the electrode layers in the adjacent elastic force control elements, when the tactile feedback module senses touch pressure, the dielectric elastomer layer generates vibration feedback under the action of an electric field force. Because a plurality of colloid microspheres are additionally arranged in the dielectric elastomer layer, when voltage is applied between adjacent electrode layers to form an electric field force to generate pressure on the dielectric elastomer layer, the dielectric elastomer layer is easily compressed, the dielectric elastomer layer can recover to the original shape and volume after the pressure is released, the elastic modulus of the dielectric elastomer layer is reduced, the dielectric elastomer layer can be easily elastically deformed under stress, and the voltage required by the deformation of the dielectric elastomer layer is reduced; the dielectric elastomer layer can generate larger deformation vibration under smaller touch pressure. The different dielectric elastomer layers vibrate simultaneously, a resonance effect can be generated, the sensitivity of the touch feedback module to the touch pressure sensing is improved, and a user can feel strong touch feedback vibration sense under small touch pressure.
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 touch 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 (10)
1. A tactile feedback module, comprising at least two mutually superimposed elastic force control elements,
the elasticity control element comprises an electrode layer and a dielectric elastomer layer which are overlapped with each other;
the electrode layer of one of the adjacent elasticity control elements is adjacent to the dielectric elastomer layer of the other elasticity control element;
the dielectric elastomer layer is provided with a plurality of colloid microspheres, and voltage signals with different polarities are applied to electrode layers in adjacent elastic force control elements, so that the dielectric elastomer layer generates vibration feedback under the action of an electric field force.
2. A haptic feedback module as recited in claim 1 wherein said colloidal microspheres comprise a shell and a fluid enclosed by said shell.
3. A haptic feedback module as recited in claim 2 wherein said housing is a thermoplastic polymer housing.
4. A haptic feedback module as recited in claim 2 wherein said colloidal microspheres are uniformly distributed in said dielectric elastomer layer.
5. A haptic feedback module as recited in any of claims 1-4 wherein said colloidal microspheres have a maximum diameter of 1 μm-30 μm.
6. A haptic feedback module as recited in any of claims 1-4 wherein said number of spring force control elements is from 2-40.
7. A haptic feedback module as recited in any one of claims 1-4 wherein said voltage signal is a triangular wave voltage.
8. A touch screen, comprising:
the haptic feedback module of any of claims 1-7, wherein the dielectric elastomer layer generates a vibration feedback under an electric field force when the touch screen senses a touch pressure.
9. A keyboard, comprising:
the haptic feedback module of any of claims 1-7, wherein the haptic feedback module is for a key, and the dielectric elastomer layer generates vibration feedback under an electric field force when the key senses a touch.
10. An electronic device, comprising:
the haptic feedback module of any of claims 1-7.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113670187A (en) * | 2021-09-06 | 2021-11-19 | 宁波韧和科技有限公司 | Capacitive elastic strain sensor with high safety and high detection range and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113670187A (en) * | 2021-09-06 | 2021-11-19 | 宁波韧和科技有限公司 | Capacitive elastic strain sensor with high safety and high detection range and preparation method thereof |
| CN113670187B (en) * | 2021-09-06 | 2022-09-20 | 宁波韧和科技有限公司 | Capacitive elastic strain sensor with high safety and high detection range and preparation method thereof |
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