Vibrator and manufacturing method, tactile reproduction device and vibration waveform detection method

Abstract

The present invention provides a vibrator and a manufacturing method, a tactile reproduction device and a vibration waveform detection method, which relate to the field of display technology. The vibrator includes: a substrate and a piezoelectric component and a light-emitting component located on the substrate; wherein the piezoelectric component includes: an inverse piezoelectric unit, and the light-emitting component includes: a positive piezoelectric unit and a light-emitting unit, and the inverse piezoelectric unit and the positive piezoelectric unit are in contact and connected. The vibrator of this scheme can be set in a touch reproduction screen, and the inverse piezoelectric unit in the vibrator is driven to deform to generate vibration, and the positive piezoelectric unit in contact with it is driven to deform to generate current to drive the light-emitting unit to emit light. Due to different amplitudes, the deformation will also be different. Therefore, the vibration position and amplitude can be materialized by the light spot emitted by the vibrator, so that the light emission of the light-emitting unit in the vibrator can be used to characterize the vibration waveform, so that the vibration waveform in the touch reproduction screen can be efficiently and conveniently detected.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a vibrator and a manufacturing method thereof, a tactile reproduction device and a vibration waveform detection method. Background Art

[0002] Haptic feedback is a technology that enables terminal devices to interact with the human body through touch. Tactile reproduction technology can perceive the characteristics of objects by touching the screen with limbs. Different tactile sensations can be simulated by setting a vibrator on the touch screen according to the different friction between the object surface and the limb skin, thereby achieving efficient and natural interaction on multimedia terminals. It has great research value, so it is necessary to detect the vibration waveform on the touch screen with tactile reproduction.

[0003] In the prior art, tiny particles are usually placed on the touch screen to analyze and obtain the vibration waveform based on the dispersion and aggregation of the particles when the touch screen vibrates. However, the use of particle detection often leads to sample contamination that is difficult to clean. Alternatively, a laser vibration measurement device is used to obtain the vibration waveform by fitting the measured laser vibration information through software. However, the laser vibration measurement method is not only expensive but also takes a long time to detect and cannot present the vibration waveform in a timely manner.

[0004] Therefore, how to efficiently and conveniently detect the vibration waveform of a touch reproduction device has become a problem that technical personnel in this field need to solve urgently. Summary of the invention

[0005] Embodiments of the present invention provide a vibrator and a manufacturing method thereof, a tactile reproduction device and a vibration waveform detection method to solve the problem of how to efficiently and conveniently detect the vibration waveform of a tactile reproduction device in the prior art.

[0006] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0007] On the one hand, a vibrator is provided, comprising: a substrate, and a piezoelectric component and a light-emitting component located on the substrate; wherein the piezoelectric component comprises an inverse piezoelectric unit, the light-emitting component comprises a positive piezoelectric unit and a light-emitting unit, the inverse piezoelectric unit and the positive piezoelectric unit are in contact and connection, and the positive piezoelectric unit is electrically connected to the light-emitting unit;

[0008] The piezoelectric component is configured to receive an electrical signal to cause the inverse piezoelectric unit to deform, thereby driving the positive piezoelectric unit to deform;

[0009] The positive piezoelectric unit is configured to generate current when deformed to drive the light-emitting unit to emit light.

[0010] Optionally, the piezoelectric component also includes: a top electrode and a bottom electrode; the bottom electrode, the inverse piezoelectric unit, and the top electrode are stacked on the substrate, the inverse piezoelectric unit is arranged between the bottom electrode and the substrate, the top electrode and the positive piezoelectric unit are arranged in the same layer on a side of the inverse piezoelectric unit facing away from the bottom electrode, and the side of the positive piezoelectric unit facing away from the inverse piezoelectric unit is electrically connected to the light-emitting unit.

[0011] Optionally, an external circuit is provided on the top electrode; the top electrode is configured to receive an electrical signal sent by the external circuit to cause the inverse piezoelectric unit to deform.

[0012] Optionally, the light-emitting unit includes: an LED electrode and an LED chip, the LED electrode is electrically connected to the positive piezoelectric unit; and the LED electrode is arranged between the positive piezoelectric electrode and the LED chip.

[0013] Optionally, the inverse piezoelectric unit is a piezoelectric ceramic electrode, and the positive piezoelectric unit is an interdigital electrode.

[0014] Optionally, the substrate is a transparent substrate.

[0015] On the other hand, a method for manufacturing the vibrator as described above is provided, the method comprising:

[0016] providing a substrate;

[0017] forming a bottom electrode on the substrate;

[0018] forming an inverse piezoelectric unit on a side of the bottom electrode facing away from the substrate;

[0019] forming a top electrode and a positive piezoelectric unit on the same surface of the inverse piezoelectric unit away from the bottom electrode;

[0020] polarizing the bottom electrode and the top electrode;

[0021] A light-emitting unit is provided; and the light-emitting unit is welded on a side of the positive piezoelectric unit that is away from the reverse piezoelectric unit.

[0022] Optionally, polarizing the bottom electrode and the top electrode comprises:

[0023] A voltage is applied to the top electrode to polarize the top electrode and the bottom electrode.

[0024] On the other hand, a tactile reproduction device is provided, comprising: a touch display device and a controller; wherein the touch display device comprises: a display component, a touch component and a vibrator according to any one of claims 1 to 6, wherein the vibrator and the touch component are located on a light emitting side of the display component, and the vibrator is arranged on a side of the touch component away from the display component;

[0025] The controller is electrically connected to the vibrator and the touch component respectively, and is configured to obtain a touch signal generated by the touch component, and send an electrical signal to the vibrator according to the touch information, so that the inverse piezoelectric unit in the vibrator resonates with the touch component, and the positive piezoelectric unit in the vibrator is deformed to generate current, thereby driving the light-emitting unit in the vibrator to emit light.

[0026] Optionally, a plurality of the vibrators are arranged in a vertical array on the touch control component.

[0027] In another aspect, a method for detecting a vibration waveform of a tactile reproduction device as described above is provided, the method comprising:

[0028] Collecting a device image of the light-emitting side of the tactile reproduction device;

[0029] A vibration waveform is acquired based on the light emission image of the vibrator of the tactile reproduction device in the device image.

[0030] Embodiments of the present invention provide a vibrator and a manufacturing method, a tactile reproduction device and a vibration waveform detection method. The inverse piezoelectric unit in the vibrator is driven to deform by an electrical signal to generate vibration, thereby driving the positive piezoelectric unit in contact with the vibrator to deform to generate current to drive the light-emitting unit to emit light. Therefore, the vibrator can be set in a touch reproduction screen. Since the amplitude is different, the deformation will also be different. Therefore, the vibration position and amplitude can be materialized by the light spot emitted by the vibrator, so that the light emission of the light-emitting unit in the vibrator can be used to characterize the vibration waveform, thereby efficiently and conveniently detecting the vibration waveform in the touch reproduction screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of the structure of a vibrator provided by an embodiment of the present invention;

[0033] Figure 2 One of the schematic diagrams of the principle of a positive piezoelectric effect provided by an embodiment of the present invention;

[0034] Figure 3 A second schematic diagram of the principle of a positive piezoelectric effect provided by an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of the structure of another vibrator provided by an embodiment of the present invention;

[0036] Figure 5 A flowchart of a method for manufacturing a vibrator provided in an embodiment of the present application;

[0037] Figure 6 One of the structural schematic diagrams of a method for manufacturing a vibrator provided in an embodiment of the present application;

[0038] Figure 7 A second structural schematic diagram of a method for manufacturing a vibrator provided in an embodiment of the present application;

[0039] Figure 8 A third structural diagram of a method for manufacturing a vibrator provided in an embodiment of the present application;

[0040] Fig. 9 A schematic diagram of the structure of a tactile reproduction device provided in an embodiment of the present application;

[0041] Fig.10 A schematic diagram of the arrangement of a vibrator provided in an embodiment of the present application;

[0042] Fig.11 A schematic diagram of the effect of a tactile reproduction device provided in an embodiment of the present application;

[0043] Fig.12 A flowchart of the steps of a vibration waveform detection method for a tactile reproduction device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the embodiments of the present invention, words such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. This is only for the purpose of clearly describing the technical solutions of the embodiments of the present invention, and shall not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0046] In the embodiments of the present invention, “plurality” means two or more than two, and “at least one” means one or more than one, unless otherwise clearly and specifically defined.

[0047] Embodiment 1

[0048] Reference Figure 1 , the present application embodiment provides a structural schematic diagram of a vibrator, including: a substrate 1 and a piezoelectric component 2 and a light-emitting component 3 located on the substrate; wherein the piezoelectric component 2 includes: an inverse piezoelectric unit 21, the light-emitting component 3 includes: a positive piezoelectric unit 31 and a light-emitting unit 32, the inverse piezoelectric unit 21 and the positive piezoelectric unit 31 are in contact and connected, and the positive piezoelectric unit 31 is electrically connected to the light-emitting unit 32;

[0049] The piezoelectric component 2 is configured to receive an electrical signal to cause the inverse piezoelectric unit 21 to deform, thereby driving the positive piezoelectric unit 31 to deform;

[0050] The positive piezoelectric unit 31 is configured to generate current when deformed to drive the light emitting unit 32 to emit light.

[0051] In the embodiment of the present application, the inverse piezoelectric unit 21 is a piezoelectric medium that can produce an inverse piezoelectric effect, and can be formed by growing or depositing materials with light transmittance and conductivity such as PZT (Piezoelectric ceramics Transducer), aluminum nitride, zinc oxide, polyvinylidene fluoride, etc. The positive piezoelectric unit 31 is a piezoelectric electrode that can produce a positive piezoelectric effect, and can be formed by producing or depositing a piezoelectric material with a positive piezoelectric effect. The light-emitting unit 32 can be composed of an LED (Light Emitting Diode) unit, an OLED (Organic Light-Emitting Diode) unit, etc. that is driven by current to emit light. The inverse piezoelectric unit 21 needs to be in contact with the positive piezoelectric unit 31 so that the vibration generated by the deformation of the inverse piezoelectric unit 21 can be transmitted to the positive piezoelectric unit 31.

[0052] In actual application, the inverse piezoelectric unit 21 receives an electrical signal sent by an external device through the piezoelectric component, generates an inverse piezoelectric effect to generate deformation and vibrate, and the mechanical energy of the vibration is transmitted to the positive piezoelectric unit 31 in the contact-connected light-emitting component 3, causing the positive piezoelectric unit 31 in the light-emitting component 3 to deform, so that the positive piezoelectric unit 31 generates a positive piezoelectric effect to convert the mechanical energy of the deformation into current, and transmits the generated current to the light-emitting unit 32 electrically connected to it, and drives the light-emitting unit 32 to emit light through the current.

[0053] For ease of understanding, refer to Figure 2 A schematic diagram of the principle of the positive piezoelectric effect is provided, wherein when the positive piezoelectric unit is unbending, there will be no positive or negative current in the positive piezoelectric unit, and when the positive piezoelectric unit is bent, positive and negative current will be generated in the positive piezoelectric unit.

[0054] Reference Figure 3 A second schematic diagram of the principle of the positive piezoelectric effect is provided, in which the positive piezoelectric unit is deformed due to vibration, and a current with a density corresponding to the deformation vibration frequency is generated in the positive piezoelectric unit through the positive piezoelectric effect. Currents of different densities are transmitted to the light-emitting unit adapted to different vibration frequencies, and the light-emitting unit will also generate light of different brightness.

[0055] A vibrator provided in an embodiment of the present application drives an inverse piezoelectric unit in the vibrator to deform to generate vibration through an electrical signal, thereby driving a positive piezoelectric unit in contact with the vibrator to deform to generate current to drive a light-emitting unit to emit light. Therefore, the vibrator can be set in a touch reproduction screen. Since the amplitude is different, the deformation will also be different. Therefore, the vibration position and amplitude can be materialized by the light spot emitted by the vibrator, so that the light emission of the light-emitting unit in the vibrator can be used to characterize the vibration waveform, thereby efficiently and conveniently detecting the vibration waveform in the touch reproduction screen.

[0056] Optionally, refer to Figure 1 The piezoelectric component 2 also includes: a top electrode 23 and a bottom electrode 22; the bottom electrode 22, the inverse piezoelectric unit 21, and the top electrode 23 are stacked on the substrate 1, the inverse piezoelectric unit 21 is arranged between the bottom electrode 22 and the substrate 1, and the top electrode 23 and the positive piezoelectric unit 31 are arranged on the same layer on a side of the inverse piezoelectric unit 21 away from the bottom electrode 22, and the positive piezoelectric unit 31 is electrically connected to the light-emitting unit 32 on a side of the positive piezoelectric unit 31 away from the inverse piezoelectric unit 21.

[0057] In the embodiment of the present application, a bottom electrode is provided between the inverse piezoelectric unit 21 and the substrate 1 to prevent the bottom of the inverse piezoelectric unit 21 from directly contacting the substrate 1, thereby preventing the inverse piezoelectric unit 21 from being damaged. In addition, a top electrode 23 is provided on the same side of the inverse piezoelectric unit 21 as the light-emitting unit 32, which can also prevent the top of the inverse piezoelectric unit 21 from being directly exposed to the outside and damaged, thereby improving the stability of the vibrator.

[0058] The positive piezoelectric unit 31 and the reverse piezoelectric unit 21 can be superimposed on the light-emitting side or the backlight side of the light-emitting unit 32. When they are arranged on the light-emitting side, in order to ensure that the light emitted by the light-emitting unit 32 can be detected, the positive piezoelectric unit 31 and the reverse piezoelectric unit 21 are required to be made of a light-transmitting material, so that the light emitted by the light-emitting unit 32 can pass through the positive piezoelectric unit 31 and the reverse piezoelectric unit 21 and be visually perceived by the user or collected by the detection equipment.

[0059] The embodiment of the present application uses a positive piezoelectric unit and an inverse piezoelectric unit made of a light-transmitting material to ensure that when the positive piezoelectric unit and the inverse piezoelectric unit are arranged on the light-emitting side of the light-emitting unit, the light emitted by the light-emitting unit can be dissipated into the surrounding environment.

[0060] Optionally, refer to Figure 4 , an embodiment of the present application provides a schematic diagram of the structure of another vibrator, wherein the inverse piezoelectric unit 21 is a piezoelectric ceramic electrode, and the positive piezoelectric unit 31 is an interdigital electrode.

[0061] In the embodiment of the present application, piezoelectric ceramics (PZT, Piezoelectric ceramics Transducer) is an information functional ceramic material that can convert mechanical energy and electrical energy into each other. In addition to piezoelectricity, it also has dielectricity and elasticity. It can be used as an inverse piezoelectric unit to efficiently convert electrical energy into mechanical energy, thereby generating vibration. Interdigital electrodes (IDE) are electrodes with periodic patterns in the surface such as fingers or combs. This electrode is used to generate and penetrate material samples, thereby ensuring the light transmittance of the positive piezoelectric unit.

[0062] Optionally, refer to Figure 4 , an external circuit 24 is disposed on the top electrode 23 ; the top electrode 23 is configured to receive an electrical signal sent by the external circuit 24 so as to cause the inverse piezoelectric unit 21 to deform.

[0063] In the embodiment of the present application, the top electrode 23 may also be provided with an external circuit 24 to obtain an electrical signal from the outside, thereby transmitting the electrical signal to the inverse piezoelectric unit 21, so that the inverse piezoelectric unit 21 is deformed and vibrates.

[0064] Optionally, the substrate 1 is a transparent substrate.

[0065] In the embodiment of the present application, the substrate 1 may be a light-transmitting substrate, and may be made of glass, transparent resin, etc. By arranging the substrate 1 on the opposite side of the positive piezoelectric unit 31 on the inverse piezoelectric unit 21, the inverse piezoelectric unit 21 may be prevented from being directly exposed to the outside, thereby ensuring the stability of the vibrator.

[0066] Optionally, refer to Figure 1 The light-emitting unit 32 includes: an LED electrode 321 and an LED chip 322 , the LED electrode 321 is electrically connected to the positive piezoelectric unit 31 ; the LED electrode 321 is arranged between the positive piezoelectric electrode 31 and the LED chip 322 .

[0067] In the embodiment of the present application, the LED chip 322 is a solid-state semiconductor device. The light-emitting unit 32 can be an LED unit with a horizontal structure, that is, the positive and negative electrodes of the LED electrode 321 are arranged on the same side of the LED chip 322. Thus, the side of the LED electrode 321 opposite to the LED chip 322 can be connected to the positive piezoelectric unit 31. Specifically, the LED electrode 321 can be welded to the positive piezoelectric unit 31 by growing solder or a medium such as indium.

[0068] The embodiment of the present application adopts a horizontally structured LED unit as a light-emitting unit, thereby ensuring that different surfaces of the LED electrode of the light-emitting unit can be connected to the positive piezoelectric unit and the LED chip respectively.

[0069] Embodiment 2

[0070] Reference Figure 5 , the present application embodiment provides a step flow chart of a method for manufacturing a vibrator, including:

[0071] Step S201, providing a substrate.

[0072] In the embodiment of the present application, the substrate may be a light-transmitting material, such as a glass substrate and a transparent resin substrate.

[0073] Step S202, forming a bottom electrode on the substrate.

[0074] In the embodiments of this application, refer to Figure 6 The electrode material can be set on the substrate 1 by using growth, deposition, imaging and other processes to serve as the bottom electrode 22. The bottom electrode 22 can be an electrode material with light transmittance such as ITO (Indium Tin Oxide), carbon nanotubes, nanosilver wires and graphene.

[0075] Step S203 , forming an inverse piezoelectric unit on a side of the bottom electrode facing away from the substrate.

[0076] In the embodiments of this application, refer to Figure 6 A piezoelectric material having a positive piezoelectric effect such as PZT can be arranged on the side of the bottom electrode 22 facing away from the substrate 1 through processes such as whole-surface growth, imaging, and deposition to form an inverse piezoelectric unit 21 as a piezoelectric dielectric layer.

[0077] Step S204 , forming a top electrode and a positive piezoelectric unit on the same surface of the inverse piezoelectric unit away from the bottom electrode.

[0078] In the embodiments of this application, refer to Figure 7 In a partial area of ​​the side of the inverse piezoelectric unit 21 away from the bottom electrode 22, a top electrode 23 is formed by using a light-transmitting electrode material. In another partial area of ​​the same side of the inverse piezoelectric unit 21 and the top electrode 23, a positive piezoelectric unit 31 is grown and deposited. The inverse piezoelectric unit 31 can be provided by a process such as imaging, and the inverse piezoelectric unit 31 can be an interdigitated electrode with a light-transmitting material.

[0079] Step S205: polarizing the bottom electrode and the top electrode.

[0080] In an embodiment of the present application, the top electrode and the bottom electrode are polarized by applying a preset voltage to the top electrode or the bottom electrode at a preset temperature. The preset temperature and the preset voltage can be measured experimentally and can be set according to actual needs, which is not limited here.

[0081] Step S206, providing a light-emitting unit; and welding the light-emitting unit on a side of the positive piezoelectric unit that is away from the negative piezoelectric unit.

[0082] In the embodiment of the present application, the light emitting unit may be a horizontal structure LED unit, which may be a single layer or a stacked layer, which is not limited here. Figure 8 The size of the light-emitting unit 32 only needs to conform to the pad size of the positive piezoelectric unit 31. Solder or indium and other welding materials can be grown on the pad section of the positive piezoelectric unit 31 to weld the light-emitting unit 32 to the positive piezoelectric unit 31, thereby achieving electrical connection between the positive piezoelectric unit 31 and the light-emitting unit 32.

[0083] Optionally, the step S205 includes: applying a voltage to the top electrode to polarize the top electrode and the bottom electrode.

[0084] In the embodiment of the present application, a voltage can be applied to the top electrode to polarize the top electrode and the bottom electrode, so that the top electrode can be subsequently connected to an external circuit to serve as an input electrode for electrical signals.

[0085] A method for preparing a vibrator provided in an embodiment of the present application can drive the inverse piezoelectric unit in the vibrator to deform to generate vibration through an electrical signal, thereby driving the positive piezoelectric unit in contact with the vibrator to deform to generate current to drive the light-emitting unit to emit light. Therefore, the vibrator can be set in a touch reproduction screen. Since the amplitude is different, the deformation will also be different. Therefore, the vibration position and amplitude can be realized by the light spot emitted by the vibrator, so that the light emission of the light-emitting unit in the vibrator can be used to characterize the vibration waveform, thereby efficiently and conveniently detecting the vibration waveform in the touch reproduction screen.

[0086] Embodiment 3

[0087] Reference Fig. 9 , a structural schematic diagram of a tactile reproduction device provided in an embodiment of the present application, comprising: a touch display device 41, a controller 42; wherein the touch display device 41 comprises: a display component 411, a touch component 412 and a vibrator 413 according to any one of claims 1 to 6, the vibrator 413 and the touch component 412 are located on the light emitting side of the display component 411, and the vibrator 313 is arranged on a side of the touch component 412 away from the display component 411;

[0088] The controller 42 is electrically connected to the vibrator 413 and the touch component 412 respectively, and is configured to obtain a touch signal generated by the touch component 412, and send an electrical signal to the vibrator 413 according to the touch information, so that the inverse piezoelectric unit 4131 in the vibrator 413 resonates with the touch component 412, and the positive piezoelectric unit 4132 in the vibrator 413 is deformed to generate current, thereby driving the light-emitting unit 4133 in the vibrator 413 to emit light.

[0089] In the embodiment of the present application, the display component 411 is a functional component with an image display function, and the touch component 412 is a sensor with a pressure or friction sensing function, which can generate touch information and transmit it to the controller 42 when receiving pressure or friction. The vibrator 413 can refer to any of the vibrators described in Example 1 and Example 2, and will not be repeated here. When the user touches the touch component with the skin of the limb, the controller 42 will send an electrical signal to the positive piezoelectric unit 4131 in the vibrator 413 according to the touch information obtained from the touch group 412, so that the positive piezoelectric unit 4131 vibrates, and drives the reverse piezoelectric unit 4132 to vibrate and deform, and then converts the mechanical energy into electric current, so as to transmit the electric current to the light-emitting unit 4133 in the vibrator 413 to emit light.

[0090] Optionally, refer to Fig.10 , the plurality of vibrators 413 are arranged in a vertical array on the touch control component.

[0091] In the embodiment of the present application, by arranging a plurality of vibrators 413 in a vertical array on a side of the touch component away from the display component, the light spots emitted by the vibrators can form, for example, Fig.11 The vibration waveform shown can effectively and intuitively reflect the vibration waveform reproduced by touch control.

[0092] In the embodiment of the present application, a device is provided on the touch component of the tactile reproduction device, in which an inverse piezoelectric unit in the vibrator is driven to deform by an electrical signal to generate vibration, thereby driving the positive piezoelectric unit in contact with the vibrator to deform to generate current to drive the light-emitting unit to emit light. Therefore, the vibrator can be set in the touch reproduction screen. Since the amplitude is different, the deformation will also be different. Therefore, the vibration position and amplitude can be materialized by the light spot emitted by the vibrator, so that the light emission of the light-emitting unit in the vibrator can be used to characterize the vibration waveform, thereby efficiently and conveniently detecting the vibration waveform in the touch reproduction screen.

[0093] Embodiment 4

[0094] Reference Fig.12 The embodiment of the present application provides a flowchart of a method for detecting a vibration waveform of a tactile reproduction device. The tactile reproduction device may be any of the tactile reproduction devices described in the third embodiment. The method includes:

[0095] Step S401 : collecting a device image of the light-emitting side of the tactile reproduction device.

[0096] In the embodiment of the present application, the image acquisition device can be used to photograph the light-emitting side of the tactile reproduction to obtain a device image.

[0097] Step S402 : acquiring a vibration waveform according to the light-emitting image of the vibrator of the tactile reproduction device in the device image.

[0098] In the embodiment of the present application, since the vibrator in the tactile reproduction device generates vibration through the inverse piezoelectric effect and simultaneously generates current through the positive piezoelectric effect to drive the light-emitting unit in the vibrator to emit light, the device image includes a light-emitting image of the vibrator. The brightness and position of these light-emitting images will change with the change of amplitude. Therefore, the vibration waveform of the vibrator in the tactile reproduction device can be represented by the light-emitting image, that is, the vibration waveform of the tactile reproduction device can be obtained by analyzing the light-emitting image.

[0099] In the embodiment of the present application, a device is provided on the touch component of the tactile reproduction device, in which an inverse piezoelectric unit in the vibrator is driven to deform by an electrical signal to generate vibration, thereby driving the positive piezoelectric unit in contact with the vibrator to deform to generate current to drive the light-emitting unit to emit light. Therefore, the vibrator can be set in the touch reproduction screen. Since the amplitude is different, the deformation will also be different. Therefore, the vibration position and amplitude can be materialized by the light spot emitted by the vibrator, so that the light emission of the light-emitting unit in the vibrator can be used to characterize the vibration waveform, thereby efficiently and conveniently detecting the vibration waveform in the touch reproduction screen.

[0100] 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.

[0101] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0102] 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, article or terminal 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, article or terminal 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, article or terminal device including the elements.

[0103] The vibrator and its manufacturing method, the tactile reproduction device and the vibration waveform detection method provided by the present invention are introduced in detail above. The principles and implementation methods of the present invention are explained in this article by using specific examples. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A vibrator, characterized in that: Used to detect the vibration waveform in a tactile reproduction device, comprising: a substrate, and a piezoelectric component and a light-emitting component located on the substrate; wherein the piezoelectric component comprises: an inverse piezoelectric unit, the light-emitting component comprises: a positive piezoelectric unit and a light-emitting unit, the inverse piezoelectric unit is in contact with the positive piezoelectric unit, and the positive piezoelectric unit is electrically connected to the light-emitting unit; The piezoelectric component is configured to receive an electrical signal to cause the inverse piezoelectric unit to deform, thereby driving the positive piezoelectric unit to deform; The positive piezoelectric unit is configured to generate current when deformation occurs to drive the light-emitting unit to emit light, and the light-emitting condition of the light-emitting unit represents the vibration waveform during deformation.

2. The vibrator according to claim 1, characterized in that The piezoelectric component also includes: a top electrode and a bottom electrode; the bottom electrode, the inverse piezoelectric unit, and the top electrode are stacked on the substrate, the inverse piezoelectric unit is arranged between the bottom electrode and the top electrode, the top electrode and the positive piezoelectric unit are arranged on the same layer on a side of the inverse piezoelectric unit facing away from the bottom electrode, and the positive piezoelectric unit is electrically connected to the light-emitting unit on a side facing away from the inverse piezoelectric unit.

3. The vibrator according to claim 2, characterized in that An external circuit is arranged on the top electrode; the top electrode is configured to receive an electrical signal sent by the external circuit so as to cause the inverse piezoelectric unit to deform.

4. The vibrator according to claim 1, characterized in that The light-emitting unit comprises: an LED electrode and an LED chip, wherein the LED electrode is electrically connected to the positive piezoelectric unit; and the LED electrode is arranged between the positive piezoelectric unit and the LED chip.

5. The vibrator according to claim 1, characterized in that The inverse piezoelectric unit is a piezoelectric ceramic electrode, and the positive piezoelectric unit is an interdigital electrode.

6. The vibrator according to claim 1, characterized in that The substrate is a transparent substrate.

7. A method for manufacturing a vibrator as claimed in any one of claims 1 to 6, characterized in that: The method comprises: providing a substrate; forming a bottom electrode on the substrate; forming an inverse piezoelectric unit on a side of the bottom electrode facing away from the substrate; forming a top electrode and a positive piezoelectric unit on the same surface of the inverse piezoelectric unit away from the bottom electrode; polarizing the bottom electrode and the top electrode; A light-emitting unit is provided; and the light-emitting unit is welded on a side of the positive piezoelectric unit that is away from the reverse piezoelectric unit.

8. The method according to claim 7, characterized in that The polarizing the bottom electrode and the top electrode comprises: A voltage is applied to the top electrode to polarize the top electrode and the bottom electrode.

9. A tactile reproduction device, characterized in that: include: A touch display device and a controller; wherein the touch display device comprises: a display component, a touch component and a vibrator according to any one of claims 1 to 6, wherein the vibrator and the touch component are located on the light emitting side of the display component, and the vibrator is arranged on a side of the touch component away from the display component; The controller is electrically connected to the vibrator and the touch component respectively, and is configured to obtain a touch signal generated by the touch component, and send an electrical signal to the vibrator according to the touch signal, so that the inverse piezoelectric unit in the vibrator resonates with the touch component, and the positive piezoelectric unit in the vibrator is deformed to generate current, thereby driving the light-emitting unit in the vibrator to emit light.

10. The tactile reproduction device according to claim 9, characterized in that: The plurality of vibrators are arranged on the touch control component in a vertical array.

11. A vibration waveform detection method for a tactile reproduction device as claimed in claims 9-10, characterized in that: The method comprises: Collecting a device image of the light-emitting side of the tactile reproduction device; A vibration waveform is acquired based on the light emission image of the vibrator of the tactile reproduction device in the device image.

Images