CN113220166B - A tactile reproduction substrate and a driving method thereof, and an electronic device - Google Patents

Abstract

The application provides a touch reproduction substrate, a driving method thereof and electronic equipment, wherein the touch reproduction substrate comprises a touch substrate, a first actuating element, a second actuating element and a driving device; the substrate in the touch substrate is provided with a first surface and a second surface connected with the first surface, the touch layer and the first actuating element in the touch substrate are arranged on the first surface in a stacked mode, and the second actuating element is arranged on the second surface; the driving device is used for acquiring touch information on the touch substrate, sending a first driving signal to the first actuating element according to the touch information so as to enable the first actuating element and the touch substrate to resonate in a direction perpendicular to the first surface, and sending a second driving signal to the second actuating element so as to enable the second actuating element and the touch substrate to resonate in a direction parallel to the first surface. The application can realize the touch reappearance by arranging the first actuating element, and can improve the friction effect of the touch surface by arranging the second actuating element.

Description

A tactile reproduction substrate and a driving method thereof, and an electronic device

Technical Field

The present application relates to the field of tactile reproduction, and in particular to a tactile reproduction substrate and a driving method thereof, and an electronic device.

Background technique

The main modes of human sensing system include vision, hearing and touch. At present, the sensing and presentation methods for vision and hearing are relatively mature, but for touch sensing, due to its relatively complex mechanism, which involves the human body's perception of various physical signals in the environment such as mechanics, temperature, chemistry, humidity, etc., the research and industrialization of the touch system is relatively late.

With the large-scale application of early resistive touch screens to current capacitive touch screens, as well as the demand for application scenarios such as virtual reality, people have an urgent need for tactile perception and tactile reproduction.

Summary of the invention

The present application provides a tactile reproduction substrate and a driving method thereof, and an electronic device to achieve tactile reproduction.

The present application provides a tactile reproduction substrate, comprising: a touch control substrate, a first actuating element, a second actuating element and a driving device;

The touch control substrate comprises a base substrate and a touch control layer, wherein the base substrate has a first surface and a second surface connected to the first surface, the touch control layer and the first actuating element are stacked on the first surface, and the second actuating element is disposed on the second surface;

The driving device is respectively connected to the touch layer, the first actuating element and the second actuating element, and is used for obtaining touch information on the touch substrate, and sending a first driving signal to the first actuating element according to the touch information so that the first actuating element and the touch substrate resonate in a direction perpendicular to the first surface, and sending a second driving signal to the second actuating element so that the second actuating element and the touch substrate resonate in a direction parallel to the first surface.

In an optional implementation, the second actuating element includes:

A first piezoelectric sheet includes a first piezoelectric layer, a first electrode disposed on a side of the first piezoelectric layer close to the substrate, and a second electrode disposed on a side of the first piezoelectric layer away from the substrate;

A first mass block is arranged on a side of the first electrode away from the first piezoelectric layer and extends along a first direction, where the first direction is an extending direction of a boundary line between the first surface and the second surface;

A second mass block is disposed on a side of the second electrode away from the first piezoelectric layer and extends along the first direction; and

A first contact block is respectively in contact with and connected to the second surface and a side of the first mass block close to the substrate;

The first mass block, the second mass block and the first contact block are all made of rigid materials, and the first mass block and the first contact block are an integrated structure.

In an optional implementation, the second actuating element includes a motor attached to the second surface, and the motor is an eccentric rotor motor, a linear vibration motor or a piezoelectric motor.

In an optional implementation, the substrate further includes a third surface connected to the first surface and arranged opposite to the second surface, and a third actuating element is further arranged on the third surface;

The driving device is also connected to the third actuating element, and is further used to send a third driving signal to the third actuating element according to the touch information, so that the third actuating element resonates with the touch substrate in a direction parallel to the first surface.

In an optional implementation, the substrate further includes a third surface connected to the first surface and arranged opposite to the second surface, and a fixing structure is further arranged on the third surface, the fixing structure is used to fix the third surface, and the fixing structure includes:

a third mass block extending along a second direction, where the second direction is an extending direction of a boundary line between the first surface and the third surface;

A second contact block is respectively in contact with and connected to the third surface and a side of the third mass block close to the substrate;

Wherein, the materials of the third mass block and the second contact block are both rigid materials, and the third mass block and the second contact block are an integral structure.

In an optional implementation, the first actuator element includes a second piezoelectric sheet, which includes: a second piezoelectric layer, a third electrode arranged on a side of the second piezoelectric layer close to the substrate, and a fourth electrode arranged on a side of the second piezoelectric layer away from the substrate.

In an optional implementation, the tactile reproduction substrate includes a display area and an edge area located outside the display area, and the second piezoelectric sheet is located in the edge area.

In an optional implementation, the substrate further includes a third surface connected to the first surface and arranged opposite to the second surface;

There are multiple second piezoelectric sheets, which are divided into a first group and a second group. The second piezoelectric sheets in the first group are arranged close to the second surface and arranged in a direction parallel to the second surface. The second piezoelectric sheets in the second group are arranged close to the third surface and arranged in a direction parallel to the third surface.

In an optional implementation, the tactile reproduction substrate includes a display area and an edge area located outside the display area, the second piezoelectric film is located in the display area, wherein the thickness of the second piezoelectric layer is less than or equal to 3μm, and the third electrode and the fourth electrode are both transparent electrodes.

In an optional implementation, the base substrate is a display substrate, and the first actuating element is disposed close to a light emitting side of the display substrate.

The present application provides an electronic device, comprising the tactile reproduction substrate described in any embodiment.

The present application provides a driving method for a tactile reproduction substrate, which is applied to the tactile reproduction substrate described in any embodiment, and the driving method includes:

Acquiring touch information on the touch substrate;

A first driving signal is sent to the first actuating element according to the touch information, so that the first actuating element resonates with the touch substrate in a direction perpendicular to the first surface, and a second driving signal is sent to the second actuating element, so that the second actuating element resonates with the touch substrate in a direction parallel to the first surface.

In an optional implementation, when the second actuating element includes the first piezoelectric sheet and the first actuating element includes the second piezoelectric sheet, the first drive signal and the second drive signal are both AC signals, and the frequency of the first drive signal is greater than the frequency of the second drive signal.

In an optional implementation, when the base substrate further includes a third surface connected to the first surface and arranged opposite to the second surface, and a third actuating element is further arranged on the third surface, after the step of acquiring touch information on the touch substrate, the method further includes:

A third driving signal is sent to the third actuating element according to the touch information, so that the third actuating element resonates with the touch substrate in a direction parallel to the first surface.

In an optional implementation, when the second actuator element includes the first piezoelectric film, and the third actuator element has the same structure as the second actuator element, the second drive signal and the third drive signal are both AC signals, and the phase difference between the second drive signal and the third drive signal is 90°.

Compared with the prior art, this application has the following advantages:

The technical solution of the present application provides a tactile reproduction substrate and a driving method thereof, and an electronic device, wherein the tactile reproduction substrate includes a touch substrate, a first actuating element, a second actuating element, and a driving device; the touch substrate includes a base substrate and a touch layer, the base substrate has a first surface and a second surface connected to the first surface, the touch layer and the first actuating element are stacked on the first surface, and the second actuating element is arranged on the second surface; the driving device is respectively connected to the touch layer, the first actuating element, and the second actuating element, and is used to obtain touch information on the touch substrate, and send a first driving signal to the first actuating element according to the touch information, so that the first actuating element resonates with the touch substrate in a direction perpendicular to the first surface, and send a second driving signal to the second actuating element, so that the second actuating element resonates with the touch substrate in a direction parallel to the first surface. The technical solution of the present application is to set a first actuating element to cause the touch substrate to vibrate longitudinally in a direction perpendicular to the first surface. The longitudinal vibration can cause the touch surface of the tactile reproduction substrate to generate friction, thereby realizing tactile reproduction; and to set a second actuating element to cause the touch substrate to vibrate transversely in a direction parallel to the first surface. The transverse vibration can enhance the friction effect of the touch surface.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

FIG1 is a schematic cross-sectional view of a tactile reproduction substrate provided in an embodiment of the present application;

FIG2 shows a schematic diagram of a planar structure of a tactile reproduction substrate provided in an embodiment of the present application;

FIG3 shows a schematic diagram of a planar structure of another tactile reproduction substrate provided in an embodiment of the present application;

FIG4 is a schematic diagram showing the force exerted on a finger on a touch surface of a tactile reproduction substrate provided by an embodiment of the present application;

FIG5 shows a vibration simulation diagram of a touch surface of a tactile reproduction substrate provided by an embodiment of the present application;

FIG6 shows a motion trajectory diagram of particles on the touch surface of the tactile reproduction substrate provided by an embodiment of the present application;

FIG. 7 shows a schematic diagram of the structures of several motors provided in an embodiment of the present application;

FIG8 shows a driving process of a tactile reproduction substrate provided by an embodiment of the present application;

FIG9 is a schematic diagram showing a partial structure of a tactile reproduction substrate provided in an embodiment of the present application;

FIG. 10 is a flowchart showing a method for driving a tactile reproduction substrate provided in an embodiment of the present application.

Detailed ways

In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

An embodiment of the present application provides a tactile reproduction substrate. FIG1 shows a schematic cross-sectional structure diagram of a tactile reproduction substrate provided by the present embodiment. The tactile reproduction substrate includes a touch control substrate, a first actuating element 12 , a second actuating element 13 and a driving device.

The touch substrate includes a base substrate 11 and a touch layer. The base substrate 11 has a first surface A1 and a second surface A2 connected to the first surface A1. The touch layer and the first actuating element 12 are stacked on the first surface A1.

The second actuating element 13 is disposed on the second surface A2 .

The driving device is respectively connected to the touch layer, the first actuating element 12 and the second actuating element 13, and is used to obtain touch information on the touch substrate, and send a first driving signal to the first actuating element 12 according to the touch information so that the first actuating element 12 and the touch substrate resonate in a direction perpendicular to the first surface A1, and send a second driving signal to the second actuating element 13 so that the second actuating element 13 and the touch substrate resonate in a direction parallel to the first surface A1.

In this embodiment, the touch substrate may be a resistive touch substrate, a capacitive touch substrate, an infrared touch substrate, etc., which is not limited in this embodiment.

The touch layer is used to realize the touch function of the touch substrate, and the specific structure can be designed according to actual needs, which is not limited in this embodiment. For example, for a capacitive touch substrate, the touch layer may include touch driving electrodes, touch sensing electrodes, touch wiring, and the like.

In this embodiment, the base substrate 11 may be a glass substrate, a metal substrate, a display substrate, etc., which is not limited in this embodiment.

In an optional implementation, the base substrate 11 may be a display substrate, and the first actuating element 12 is disposed close to the light-emitting side of the display substrate. The display substrate may be, for example, a color film substrate, an OLED (Organic Light-Emitting Diode) substrate, etc. In this way, the tactile reproduction substrate may realize a display function.

The first surface A1 may be parallel to the touch surface of the tactile reproduction substrate. The second surface A2 may be a side surface connected to the first surface A1. The second surface A2 may be perpendicular to the first surface A1 or may not be perpendicular to the first surface A1.

The first actuating element 12 may be disposed on a side of the touch layer close to or away from the first surface A1 , which is not limited in this embodiment.

In this embodiment, the first actuating element 12 is used to drive the touch substrate to vibrate longitudinally in a direction perpendicular to the first surface A1 under the drive of the first drive signal. The first actuating element 12 may include a motor attached to the first surface A1, such as an eccentric rotor motor, a linear vibration motor or a piezoelectric motor, and the corresponding first drive signal may be a DC signal. The first actuating element 12 may also include a piezoelectric element, and the corresponding first drive signal may be an AC signal. This embodiment does not limit the specific structure of the first actuating element 12, as long as it is an element that can generate vibration in a direction perpendicular to the first surface A1 under the action of the first drive signal. Among them, the piezoelectric element may include a piezoelectric layer and an electrode layer arranged on both sides of the piezoelectric layer. The structure of the first actuating element 12 will be described in detail in subsequent embodiments.

In this embodiment, the second actuating element 13 is used to drive the touch substrate to vibrate laterally in a direction parallel to the first surface A1 under the drive of the second drive signal. The second actuating element 13 may include a motor attached to the second surface A2, such as an eccentric rotor motor, a linear vibration motor or a piezoelectric motor, and the corresponding second drive signal may be a DC signal. The second actuating element 13 may also include a piezoelectric element, and the corresponding second drive signal may be an AC signal. This embodiment does not limit the specific structure of the second actuating element 13, as long as it is an element that can generate vibration in a direction parallel to the first surface A1 under the action of the second drive signal. The structure of the second actuating element 13 will be described in detail in the subsequent embodiments.

The driving device may include, for example, at least one of the following: a host computer, a FPGA (Field Programmable Gate Array) and a driving IC (Integrated Circuit) chip, etc., which is not limited in this embodiment.

In this embodiment, the touch information may include information such as the touch position. When the user's finger touches the touch surface of the tactile reproduction substrate, the touch capacitance corresponding to the touch driving electrode and the touch sensing electrode in the touch layer at the touch position will change, and the touch wiring in the touch layer can send the touch capacitance at each position to the driving device, and the driving device can determine the touch position according to the touch capacitance at each position.

In a specific implementation, the driving device may determine the first driving signal of the first actuating element 12 and the second driving signal of the second actuating element 13 according to the touch information such as the touch position.

In this embodiment, the first actuating element 12 drives the touch substrate to vibrate longitudinally in a direction perpendicular to the first surface A1, so that a normal force is generated between the finger and the touch surface of the tactile reproduction substrate. The normal force can adjust the pressure between the finger and the touch surface, thereby generating friction between the finger and the touch surface to achieve tactile reproduction.

The second actuating element 13 drives the touch substrate to vibrate laterally in a direction parallel to the first surface A1, so that a tangential force is generated between the finger and the touch surface of the tactile reproduction substrate. The tangential force can adjust the friction between the finger and the touch surface and enhance the friction effect of the touch surface.

The tactile reproduction substrate provided in this embodiment is configured with a first actuating element to cause the touch substrate to vibrate longitudinally in a direction perpendicular to the first surface. The longitudinal vibration can generate friction on the touch surface of the tactile reproduction substrate to achieve tactile reproduction. The second actuating element is configured to cause the touch substrate to vibrate transversely in a direction parallel to the first surface. The transverse vibration can enhance the friction effect of the touch surface.

Referring to FIG4 , a schematic diagram of the force exerted on the finger on the touch surface of the tactile reproduction substrate is shown. Among them, Fn is the normal force between the finger and the touch surface of the tactile reproduction substrate. Fp is the force exerted on the finger in the touch sliding direction. Ff is the reaction force exerted on the finger when sliding on the tactile reproduction substrate. Ft is the tangential force between the finger and the touch surface of the tactile reproduction substrate. The + and - signs indicate the direction of the tangential force. The magnitude of Ft is related to the lateral motion trajectory of the particles on the touch surface. As can be seen from FIG4 , by setting the second actuating element to make the touch substrate vibrate laterally in a direction parallel to the first surface A1, the tactile reproduction substrate increases a degree of freedom to modulate the friction force, thereby improving the tactile reproduction effect.

It should be noted that when both the first actuating element 12 and the second actuating element 13 include piezoelectric elements, the first drive signal and the second drive signal may be AC signals. The frequency of the first drive signal may be greater than the frequency of the second drive signal. The frequency of the first drive signal may be greater than 1kHz, such as 20kHz. The frequency of the second drive signal may be less than 1kHz, such as 500Hz, 200Hz, etc.

Referring to FIG5 , a vibration simulation diagram of the touch surface of the tactile reproduction substrate is shown. Among them, a in FIG5 is a vibration simulation diagram of the touch surface of the tactile reproduction substrate driven by the first actuating element 12 (the frequency of the first driving signal is 20kHz), and b in FIG5 is a vibration simulation diagram of the touch surface of the tactile reproduction substrate driven by the second actuating element 13 (the frequency of the second driving signal is 200Hz). It can be seen from FIG5 that the first actuating element 12 can cause the touch surface to deform longitudinally, and the second actuating element 13 can cause the touch surface to deform transversely, so both can change the magnitude of the friction force of the touch surface.

Referring to FIG6 , a motion trajectory diagram of a mass point on the touch surface of the tactile reproduction substrate is shown. The curve marked with an × corresponds to the timing point t1, and the curve marked with an ○ corresponds to the timing point t2. As can be seen from FIG6 , the motion trajectory of each mass point driven by the first actuating element 12 and the second actuating element 13 is an ellipse, and the motion of each mass point is a combination of lateral vibration and longitudinal vibration.

In an optional implementation, as shown in FIG. 2 and FIG. 3 , the second actuating element 13 may include:

The first piezoelectric sheet includes a first piezoelectric layer 131, a first electrode 132 disposed on a side of the first piezoelectric layer 131 close to the base substrate 11, and a second electrode 133 disposed on a side of the first piezoelectric layer 131 away from the base substrate 11;

The first mass block 134 is disposed on a side of the first electrode 132 away from the first piezoelectric layer 131 and extends along a first direction, where the first direction is an extending direction of a boundary line between the first surface A1 and the second surface A2;

A second mass block 135 is disposed on a side of the second electrode 133 away from the first piezoelectric layer 131 and extends along a first direction; and

The first contact block 136 is respectively in contact with and connected to the second surface A2 and a side of the first mass block 134 close to the base substrate 11 .

The materials of the first mass block 134 , the second mass block 135 and the first contact block 136 may all be rigid materials, which can reduce the absorption of vibration by these structures.

The material of the first piezoelectric layer 131 may be, for example, piezoelectric ceramics.

The first electrode 132 and the second electrode 133 may be made of opaque metal materials, such as gold, silver, copper, aluminum, etc.; or transparent conductive materials such as transparent metal oxides, for example, indium tin oxide (ITO), aluminum-doped zinc oxide (AZO), etc.

In a specific implementation, the first mass block 134 and the first contact block 136 may be an integral structure. A plurality of first contact blocks 136 may be provided, and as shown in FIG. 2 , the number of first contact blocks 136 is two.

In another optional implementation, the second actuating element 13 may include a motor attached to the second surface A2.

The motor may be, for example, an eccentric rotor motor, a linear vibration motor or a piezoelectric motor.

Referring to Fig. 7, a schematic diagram of the structures of several motors is shown, wherein a in Fig. 7 is an eccentric rotor motor, b is a linear vibration motor, and c is a piezoelectric motor.

As shown in Fig. 1, the base substrate 11 further includes a third surface A3 connected to the first surface A1 and arranged opposite to the second surface A2. The third surface A3 may be a vibration fixed end, or may be provided with an actuating element, which is not limited in this embodiment.

In an optional implementation, as shown in FIG. 2 , a third actuating element 21 may be further provided on the third surface A3 .

The driving device can also be connected to the third actuating element 21, and is further used to send a third driving signal to the third actuating element 21 according to the touch information, so that the third actuating element 21 is driven by the third driving signal to resonate with the touch substrate in a direction parallel to the first surface A1.

In this implementation, the third actuating element 21 is used to drive the touch substrate to vibrate laterally in a direction parallel to the first surface A1 under the drive of the third drive signal. The third actuating element 21 may include a motor attached to the third surface A3, such as an eccentric rotor motor, a linear vibration motor or a piezoelectric motor, and the corresponding third drive signal may be a DC signal. The third actuating element 21 may also include a piezoelectric element, and the corresponding third drive signal may be an AC signal. This embodiment does not limit the specific structure of the third actuating element 21, as long as it is an element that can generate vibration in a direction parallel to the first surface A1 under the action of the third drive signal.

It should be noted that the second actuating element 13 and the third actuating element 21 may be the same or different, and this embodiment does not limit this.

When the second actuating element 13 and the third actuating element 21 both include piezoelectric elements, the structure of the third actuating element 21 may be the same as that of the second actuating element 13 , as shown in FIG. 2 .

When both the second actuating element 13 and the third actuating element 21 include piezoelectric elements, the second drive signal and the third drive signal may both be AC signals. The phase difference between the second drive signal and the third drive signal may be, for example, 90°, that is, the second actuating element 13 and the third actuating element 21 drive the touch substrate to vibrate in the same direction in a direction parallel to the first surface A1, further increasing the friction of the touch surface and improving the tactile reproduction effect.

Of course, the phase difference between the second driving signal and the third driving signal can also be 0°, 180°, etc., which can be set according to actual needs.

In another optional implementation, as shown in FIG3 , a fixing structure 31 is further provided on the third surface A3, and the fixing structure 31 is used to fix the third surface A3, and the fixing structure 31 may include:

The third mass block 311 extends along the second direction, which is the extension direction of the boundary line between the first surface A1 and the third surface A3; and the second contact block 312 is respectively in contact with the third surface A3 and a side of the third mass block 311 close to the substrate 11.

The materials of the third mass block 311 and the second contact block 312 can both be rigid materials, which can reduce the absorption of vibration by these structures.

In a specific implementation, the third mass block 311 and the second contact block 312 may be an integral structure. A plurality of second contact blocks 312 may be provided, and as shown in FIG3 , the number of second contact blocks 312 is two.

In an optional implementation, as shown in Figure 1, the first actuator element 12 may include a second piezoelectric sheet 120, and the second piezoelectric sheet 120 may include: a second piezoelectric layer 121, a third electrode 122 arranged on the side of the second piezoelectric layer close to the base substrate 11, and a fourth electrode 123 arranged on the side of the second piezoelectric layer away from the base substrate 11.

The material of the second piezoelectric layer 121 may be, for example, piezoelectric ceramics.

In an optional implementation, as shown in FIG. 2 , the tactile reproduction substrate includes a display area TA and a fringe area TB located at the periphery of the display area TA, and the second piezoelectric sheet 120 may be located in the fringe area TB.

In this implementation, since the second piezoelectric sheet 120 can be located in the edge area TB, the structure of the second piezoelectric sheet 120 will not affect the transmittance of the display area TA. The materials of the third electrode 122 and the fourth electrode 123 can be opaque metal materials, such as gold, silver, copper, aluminum, etc.; or transparent conductive materials such as transparent metal oxides, for example: indium tin oxide (Indium Tin Oxide, ITO), aluminum-doped zinc oxide (AZO), etc.

2 , there may be multiple second piezoelectric sheets 120. The multiple second piezoelectric sheets 120 may be divided into a first group and a second group, wherein the second piezoelectric sheets 120 in the first group are arranged close to the second surface A2, and the second piezoelectric sheets 120 in the second group are arranged close to the third surface A3.

The second piezoelectric sheets in the first group may be arranged in a direction parallel to the second surface A2, and the second piezoelectric sheets in the second group may be arranged in a direction parallel to the third surface A3.

In another optional implementation, as shown in FIG3 , the tactile reproduction substrate includes a display area TA and an edge area TB located outside the display area TA, and the second piezoelectric film 120 can be located in the display area TA, wherein the thickness of the second piezoelectric layer 121 is less than or equal to 3 μm, and the third electrode 122 and the fourth electrode 123 are both transparent electrodes.

In this implementation, since the second piezoelectric film can be located in the display area TA, in order to reduce the impact on the transmittance of the display area TA, the material of the third electrode 122 and the fourth electrode 123 can be a transparent conductive material such as a transparent metal oxide, such as indium tin oxide (ITO), aluminum-doped zinc oxide (AZO), etc.

In order to reduce the influence on the transmittance of the display area TA, the thickness of the second piezoelectric layer 121 may be less than or equal to 3 μm, for example, may be 2 μm, and the specific thickness may be designed according to actual needs.

Referring to FIG8 , a driving process of a tactile reproduction substrate is shown. The driving device may include a Labview host computer and a waveform generator. First, the display screen may be controlled to display an image, and then a finger touches the touch surface of the tactile reproduction substrate. The touch layer in the tactile reproduction substrate is connected to the Labview host computer, and the Labview host computer is used to determine whether the finger touches the touch surface of the tactile reproduction substrate; if touched, the touch position and other information are obtained, and a waveform generation instruction output to the waveform generator and a second drive signal output to the second actuator element are generated according to the touch information; the waveform generator outputs a first drive signal to the first actuator element according to the waveform generation instruction, and the first actuator element drives the touch substrate to vibrate longitudinally under the action of the first drive signal, and the second actuator element drives the touch substrate to vibrate laterally under the action of the second drive signal.

Among them, the waveform generation instruction can be determined according to the touch position. As shown in Figure 9, the touch position is located in the P1 area and in the P2 area, which can correspond to different waveform generation instructions respectively, and then the waveform generator generates different first drive signals, thereby realizing different longitudinal vibrations of the first actuator driven by touch at different positions.

Among them, the second driving signal can be determined according to the touch position. As shown in FIG9 , the touch position is located in the P1 area and in the P2 area, which can correspond to different second driving signals respectively, so as to achieve different lateral vibrations of the second actuator element driven by touch at different positions. When the finger double-clicks on the touch surface of the tactile reproduction substrate, the second actuator element can also drive the tactile reproduction substrate to form low-frequency vibration (the frequency of the second driving signal is less than 500 Hz), so that the touching finger has a sense of vibration, and the tactile feedback function is realized.

An embodiment of the present application provides an electronic device, characterized by comprising the tactile reproduction substrate described in any embodiment.

An embodiment of the present application provides a driving method of a tactile reproduction substrate, which is applied to the tactile reproduction substrate described in any embodiment. Referring to FIG. 10 , the driving method includes:

Step 1001: Acquire touch information on a touch substrate.

Step 1002: Sending a first driving signal to the first actuator element according to the touch information so that the first actuator element and the touch substrate resonate in a direction perpendicular to the first surface, and sending a second driving signal to the second actuator element so that the second actuator element and the touch substrate resonate in a direction parallel to the first surface.

In an optional implementation, when the second actuating element includes a first piezoelectric sheet and the first actuating element includes a second piezoelectric sheet, the first driving signal and the second driving signal may both be AC signals.

The frequency of the first driving signal may be greater than the frequency of the second driving signal.

In an optional implementation, when the substrate further includes a third surface connected to the first surface and arranged opposite to the second surface, and a third actuating element is further arranged on the third surface, after step 1001, the following may be further included:

Step 1003 : Sending a third driving signal to the third actuating element according to the touch information, so that the third actuating element and the touch substrate resonate in a direction parallel to the first surface.

In this implementation, when the second actuating element includes a first piezoelectric sheet, and the third actuating element has the same structure as the second actuating element, both the second driving signal and the third driving signal may be AC signals.

The phase difference between the second driving signal and the third driving signal may be 90°.

Regarding the driving method in the above embodiment, the specific implementation of each step has been described in detail in the embodiment of the tactile reproduction substrate, and will not be elaborated here.

The technical solution of the present application provides a tactile reproduction substrate and a driving method thereof, and an electronic device, wherein the tactile reproduction substrate includes a touch substrate, a first actuating element, a second actuating element and a driving device; the touch substrate includes a base substrate and a touch layer, the base substrate has a first surface and a second surface connected to the first surface, the touch layer and the first actuating element are stacked on the first surface, and the second actuating element is arranged on the second surface; the driving device is respectively connected to the touch layer, the first actuating element and the second actuating element, and is used to obtain touch information on the touch substrate, and send a first driving signal to the first actuating element according to the touch information, so that the first actuating element resonates with the touch substrate in a direction perpendicular to the first surface, and send a second driving signal to the second actuating element, so that the second actuating element resonates with the touch substrate in a direction parallel to the first surface. The technical solution of the present application is to set a first actuating element to cause the touch substrate to vibrate longitudinally in a direction perpendicular to the first surface. The longitudinal vibration can cause the touch surface of the tactile reproduction substrate to generate friction, thereby realizing tactile reproduction; and to set a second actuating element to cause the touch substrate to vibrate transversely in a direction parallel to the first surface. The transverse vibration can enhance the friction effect of the touch surface.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

The above is a detailed introduction to a tactile reproduction substrate and its driving method and electronic device provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims (13)

1. A tactile reproduction substrate, characterized in that it comprises: a touch substrate, a first actuating element, a second actuating element and a driving device; The touch control substrate comprises a base substrate and a touch control layer, wherein the base substrate has a first surface and a second surface connected to the first surface, the touch control layer and the first actuating element are stacked on the first surface, and the second actuating element is disposed on the second surface; The driving device is connected to the touch layer, the first actuating element and the second actuating element respectively, and is used to obtain touch information on the touch substrate, and send a first driving signal to the first actuating element according to the touch information so that the first actuating element and the touch substrate resonate in a direction perpendicular to the first surface, and send a second driving signal to the second actuating element so that the second actuating element and the touch substrate resonate in a direction parallel to the first surface; The second actuating element comprises: A first piezoelectric sheet comprises a first piezoelectric layer, a first electrode arranged on a side of the first piezoelectric layer close to the substrate, and a second electrode arranged on a side of the first piezoelectric layer away from the substrate; the first electrode and the second electrode are made of indium tin oxide or aluminum-doped zinc oxide; A first mass block is arranged on a side of the first electrode away from the first piezoelectric layer and extends along a first direction, where the first direction is an extending direction of a boundary line between the first surface and the second surface; A second mass block is disposed on a side of the second electrode away from the first piezoelectric layer and extends along the first direction; and A first contact block is respectively in contact with and connected to the second surface and a side of the first mass block close to the substrate; The first mass block, the second mass block and the first contact block are all made of rigid materials, and the first mass block and the first contact block are an integrated structure. 2. The tactile reproduction substrate according to claim 1, characterized in that the base substrate further comprises a third surface connected to the first surface and arranged opposite to the second surface, and a third actuating element is further arranged on the third surface; The driving device is also connected to the third actuating element, and is further used to send a third driving signal to the third actuating element according to the touch information, so that the third actuating element resonates with the touch substrate in a direction parallel to the first surface. 3. The tactile reproduction substrate according to claim 1, characterized in that the base substrate further comprises a third surface connected to the first surface and arranged opposite to the second surface, and a fixing structure is further arranged on the third surface, the fixing structure is used to fix the third surface, and the fixing structure comprises: a third mass block extending along a second direction, where the second direction is an extending direction of a boundary line between the first surface and the third surface; A second contact block is respectively in contact with and connected to the third surface and a side of the third mass block close to the substrate; Wherein, the materials of the third mass block and the second contact block are both rigid materials, and the third mass block and the second contact block are an integrated structure. 4. The tactile reproduction substrate according to claim 1 is characterized in that the first actuator element includes a second piezoelectric sheet, and the second piezoelectric sheet includes: a second piezoelectric layer, a third electrode arranged on a side of the second piezoelectric layer close to the base substrate, and a fourth electrode arranged on a side of the second piezoelectric layer away from the base substrate. 5 . The tactile reproduction substrate according to claim 4 , wherein the tactile reproduction substrate comprises a display area and an edge area located outside the display area, and the second piezoelectric sheet is located in the edge area. 6. The tactile reproduction substrate according to claim 5, characterized in that the base substrate further comprises a third surface connected to the first surface and arranged opposite to the second surface; There are multiple second piezoelectric sheets, which are divided into a first group and a second group. The second piezoelectric sheets in the first group are arranged close to the second surface and arranged in a direction parallel to the second surface. The second piezoelectric sheets in the second group are arranged close to the third surface and arranged in a direction parallel to the third surface. 7. The tactile reproduction substrate according to claim 4 is characterized in that the tactile reproduction substrate includes a display area and an edge area located outside the display area, the second piezoelectric sheet is located in the display area, wherein the thickness of the second piezoelectric layer is less than or equal to 3 μm, and the third electrode and the fourth electrode are both transparent electrodes. 8 . The tactile reproduction substrate according to claim 1 , wherein the base substrate is a display substrate, and the first actuating element is arranged close to a light emitting side of the display substrate. 9 . An electronic device, comprising the tactile reproduction substrate according to claim 1 . 10. A driving method for a tactile reproduction substrate, characterized in that it is applied to the tactile reproduction substrate according to any one of claims 1 to 8, the driving method comprising: Acquiring touch information on the touch substrate; A first driving signal is sent to the first actuating element according to the touch information, so that the first actuating element resonates with the touch substrate in a direction perpendicular to the first surface, and a second driving signal is sent to the second actuating element, so that the second actuating element resonates with the touch substrate in a direction parallel to the first surface. 11. The driving method according to claim 10 is characterized in that, when the second actuator element includes the first piezoelectric film and the first actuator element includes the second piezoelectric film, the first driving signal and the second driving signal are both AC signals, and the frequency of the first driving signal is greater than the frequency of the second driving signal. 12. The driving method according to claim 10, characterized in that when the base substrate further includes a third surface connected to the first surface and arranged opposite to the second surface, and a third actuating element is further arranged on the third surface, after the step of acquiring the touch information on the touch substrate, the method further includes: A third driving signal is sent to the third actuating element according to the touch information, so that the third actuating element resonates with the touch substrate in a direction parallel to the first surface. 13. The driving method according to claim 12 is characterized in that, when the second actuator element includes the first piezoelectric film, and the third actuator element has the same structure as the second actuator element, the second drive signal and the third drive signal are both AC signals, and the phase difference between the second drive signal and the third drive signal is 90°.