Touch panel, driving method thereof, and touch device

Abstract

The embodiment of the present application provides a touch panel and a driving method thereof and a touch device, the touch panel comprising: a substrate, and a touch structure and a tactile sensor which are arranged in a stack on the substrate; the touch structure comprises a first electrode layer, an insulating layer and a second electrode layer which are arranged in a stack on the substrate; the tactile sensor comprises a third electrode layer, a piezoelectric layer and a fourth electrode layer which are arranged in a stack on the substrate; wherein at least one electrode layer in the touch structure and the tactile sensor is multiplexed with each other. The above touch panel provided by the embodiment of the present application adopts the structure of integrating the tactile sensor and the touch structure, can realize the touch function and the tactile reproduction function, and at least one electrode layer in the tactile sensor and the touch structure is multiplexed with each other, so that the manufacturing of at least one electrode layer can be saved, the manufacturing process flow can be simplified, the module thickness can be reduced, the production cost can be saved, and the production efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the field of sensor technology, and in particular to a touch panel and its driving method and touch device. Background Technology

[0002] Haptics is a key area of ​​technological development today. Specifically, haptic feedback enables interaction between a device and the human body through touch. Haptic feedback can be divided into two categories: vibration feedback and haptic reproduction technology.

[0003] Surface tactile reproduction technology allows users to perceive object characteristics through bare-finger touchscreens, enabling efficient and natural interaction on multimedia terminals. This technology holds significant research value and has thus garnered widespread attention from researchers both domestically and internationally. Physically, surface tactile sensation involves the interaction between the roughness of an object's surface and the skin (fingertips), resulting in varying frictional forces due to differences in surface structure. Therefore, by controlling surface friction, different tactile sensations can be simulated. Summary of the Invention

[0004] This invention provides a touch panel and its driving method, as well as a touch device, the specific solutions of which are as follows:

[0005] An embodiment of the present invention provides a touch panel, comprising: a substrate, and a touch structure and a tactile sensor stacked on the substrate;

[0006] The touch structure includes a first electrode layer, an insulating layer, and a second electrode layer sequentially stacked on the substrate.

[0007] The tactile sensor includes a third electrode layer, a piezoelectric layer, and a fourth electrode layer that are sequentially stacked on the substrate.

[0008] In this embodiment, at least one electrode layer in the tactile sensor and the touch control structure is reused.

[0009] In one possible implementation, in the touch panel provided in the embodiments of the present invention, the touch structure is located between the tactile sensor and the substrate, and the second electrode layer and the third electrode layer are reused.

[0010] In one possible implementation, in the touch panel provided in the embodiments of the present invention, the second electrode layer includes a plurality of second electrodes extending along a first direction, each second electrode including a plurality of second electrode blocks; the fourth electrode layer includes a plurality of fourth electrodes extending along a second direction, each fourth electrode including a plurality of fourth electrode blocks; the first direction and the second direction are intersected.

[0011] The second electrode layer further includes a connecting portion located between adjacent second electrode blocks, and each second electrode block is electrically connected through the connecting portion;

[0012] The second electrode layer also includes a bridging portion located between adjacent second electrodes and insulated from the second electrodes in the same layer, and each of the fourth electrode blocks is electrically connected through the bridging portion.

[0013] In one possible implementation, in the touch panel provided in the embodiments of the present invention, the insulating layer has a planar structure, and the piezoelectric layer includes a plurality of piezoelectric portions, which are located between the second electrode block and the fourth electrode block.

[0014] In one possible implementation, in the touch panel provided in the embodiments of the present invention, the tactile sensor is located between the touch structure and the substrate, and the first electrode layer and the fourth electrode layer are reused.

[0015] In one possible implementation, in the touch panel provided in the embodiments of the present invention, the first electrode layer includes a plurality of first electrodes extending along a first direction, each first electrode including a plurality of first electrode blocks; the second electrode layer includes a plurality of second electrodes extending along a second direction, each second electrode including a plurality of second electrode blocks; the first direction and the second direction are intersected.

[0016] The first electrode layer further includes a connecting portion located between adjacent first electrode blocks, and each first electrode block is electrically connected through the connecting portion;

[0017] The first electrode layer further includes a bridging portion located between adjacent first electrodes and insulated from the first electrodes in the same layer, and each second electrode block is electrically connected through the bridging portion.

[0018] In one possible implementation, in the touch panel provided in the embodiments of the present invention, the piezoelectric layer has a planar structure, and the insulating layer includes a plurality of insulating portions, which are located between the first electrode block and the second electrode block.

[0019] In one possible implementation, in the touch panel provided in the embodiments of the present invention, the third electrode layer is reused with the first electrode layer, the piezoelectric layer is reused with the insulating layer, and the fourth electrode layer is reused with the second electrode layer.

[0020] In one possible implementation, in the touch panel provided in the embodiments of the present invention, the third electrode layer includes a plurality of third electrodes extending along a first direction, each of the third electrodes including a plurality of third electrode blocks; the fourth electrode layer includes a plurality of fourth electrodes extending along a second direction, each of the fourth electrodes including a plurality of fourth electrode blocks; the first direction and the second direction are intersected.

[0021] The third electrode layer further includes a connecting portion located between adjacent third electrode blocks, and each third electrode block is electrically connected through the connecting portion;

[0022] The third electrode layer further includes a bridging portion located between adjacent third electrodes and insulated from the third electrodes in the same layer, and each of the fourth electrode blocks is electrically connected through the bridging portion.

[0023] In one possible implementation, in the touch panel provided in the embodiments of the present invention, the piezoelectric layer includes a plurality of piezoelectric portions, which are located between the third electrode block and the fourth electrode block.

[0024] Accordingly, embodiments of the present invention also provide a touch device, including: a display device, and a touch panel as described in any of the above claims located on the light-emitting side of the display device, wherein the substrate in the touch panel is reused as a cover plate in the touch device, and the surface of the substrate away from the display device is a touch surface.

[0025] Accordingly, embodiments of the present invention also provide a driving method for driving the touch panel described in any of the above claims, comprising:

[0026] In the initial stage of touch detection, the touch position is detected by loading a scanning drive signal onto the touch structure;

[0027] When a touch position is detected, a mixed signal of scanning drive signal and vibration signal is applied to the electrode layer that is reused in the touch structure and the tactile sensor. The touch position is detected by the touch structure, and the tactile sensor forms a standing wave to realize tactile reproduction.

[0028] The beneficial effects of the embodiments of the present invention are as follows:

[0029] This invention provides a touch panel and its driving method and touch device. The touch panel includes a substrate, and a touch structure and a tactile sensor stacked on the substrate. The touch structure includes a first electrode layer, an insulating layer, and a second electrode layer stacked sequentially on the substrate. The tactile sensor includes a third electrode layer, a piezoelectric layer, and a fourth electrode layer stacked sequentially on the substrate. At least one electrode layer in the tactile sensor and the touch structure is reused. The touch panel provided by this invention adopts an integrated structure of tactile sensor and touch structure, enabling touch functionality and tactile reproduction. Furthermore, the reuse of at least one electrode layer in the tactile sensor and the touch structure saves the fabrication of at least one electrode layer, simplifies the manufacturing process, reduces module thickness, saves production costs, and improves production efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a touch panel provided in an embodiment of the present invention;

[0031] Figure 2 for Figure 1 A top view of the corresponding portion of the membrane layer;

[0032] Figure 3 This is another structural schematic diagram of the touch panel provided in an embodiment of the present invention;

[0033] Figure 4 for Figure 3 A top view of the corresponding portion of the membrane layer;

[0034] Figure 5 This is another structural schematic diagram of the touch panel provided in an embodiment of the present invention;

[0035] Figure 6 for Figure 5 A top view of the corresponding portion of the membrane layer;

[0036] Figure 7 This is a schematic diagram of the driving method for a touch panel provided in an embodiment of the present invention;

[0037] Figure 8A This is a schematic diagram of the scanning drive signal for the touch structure.

[0038] Figure 8B This is a schematic diagram of the tactile vibration drive signal of a tactile sensor.

[0039] Figure 8C A schematic diagram showing the mixing of scanning drive signals for the touch control structure and tactile vibration drive signals for the touch sensor;

[0040] Figure 9A This is a diagram illustrating the effect of determining the finger touch position.

[0041] Figure 9B This is a schematic diagram illustrating the tactile reproduction effect.

[0042] Figure 10 This is a top-view diagram of multiple sets of Tx and Rx. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Furthermore, the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "comprising" or "including," and similar terms used in this invention, mean that the element or object preceding the term encompasses the element or object listed following the term and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "inner," "outer," "upper," and "lower" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] It should be noted that the dimensions and shapes of the figures in the accompanying drawings do not reflect actual proportions and are intended only to illustrate the content of the invention. Furthermore, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0046] This invention provides a touch panel, such as... Figure 1 , Figure 3 and Figure 5 As shown, it includes: a substrate 1, and a touch structure and a touch sensor stacked on the substrate 1;

[0047] The touch structure includes a first electrode layer 21, an insulating layer 22, and a second electrode layer 23 sequentially stacked on a substrate 1.

[0048] The tactile sensor includes a third electrode layer 31, a piezoelectric layer 32 and a fourth electrode layer 33, which are sequentially stacked on a substrate 1;

[0049] In this design, at least one electrode layer in the tactile sensor and the touch control structure is reused.

[0050] The touch panel provided in this embodiment of the invention adopts an integrated structure of tactile sensor and touch structure, which can realize touch function and tactile reproduction function. Moreover, at least one electrode layer in the tactile sensor and touch structure can be reused, which can save the production of at least one electrode layer, simplify the manufacturing process, reduce the module thickness, save production costs, and improve production efficiency.

[0051] In specific implementation, the substrate 1 can be a substrate made of glass, a substrate made of silicon or silicon dioxide (SiO2), a substrate made of sapphire, or a substrate made of metal wafers. There are no limitations here. Those skilled in the art can set the substrate 1 according to the actual application needs.

[0052] In specific implementations, the piezoelectric layer material can be lead zirconate titanate (Pb(Zr,Ti)O3, PZT), or at least one of aluminum nitride (AlN), ZnO (zinc oxide), barium titanate (BaTiO3), lead titanate (PbTiO3), potassium niobate (KNbO3), lithium niobate (LiNbO3), lithium tantalate (LiTaO3), and lanthanum gallium silicate (La3Ga5SiO14). This ensures both the transparency of the touch panel and its vibration characteristics. The specific material for the piezoelectric layer can be selected based on the actual needs of those skilled in the art, and is not limited here. When using PZT to fabricate the piezoelectric layer, the high piezoelectric coefficient of PZT guarantees the piezoelectric characteristics of the corresponding touch panel, allowing it to be applied to haptic feedback devices. Furthermore, PZT has high light transmittance, so its integration into display devices does not affect the display quality.

[0053] In specific implementation, in the touch panel provided in the embodiments of the present invention, such as Figure 1 As shown, the touch structure (21, 22, and 23) is located between the tactile sensor (31, 32, and 33) and the substrate 1, with the second electrode layer 23 and the third electrode layer 31 being reused. This saves the fabrication of one electrode layer, simplifies the manufacturing process, reduces module thickness, saves production costs, and improves production efficiency. Specifically, the second electrode layer 23 and the third electrode layer 31 can serve as driving electrodes Tx, the first electrode layer 21 serves as the sensing electrode Rx of the touch structure, and the fourth electrode layer 33 is grounded, thereby achieving the integration of touch control and tactile reproduction functions.

[0054] In specific implementation, in the touch panel provided in the embodiments of the present invention, such as Figure 1 and Figure 2 As shown, Figure 2 for Figure 1 A top view of the middle part of the film layer shows that the second electrode layer 23 includes a plurality of second electrodes 231 extending along the first direction X, and each second electrode 231 includes a plurality of second electrode blocks 2311; the fourth electrode layer 33 includes a plurality of fourth electrodes 331 extending along the second direction Y, and each fourth electrode 331 includes a plurality of fourth electrode blocks 3311; the first direction X and the second direction Y are arranged intersecting.

[0055] The second electrode layer 23 also includes a connecting portion 4 located between adjacent second electrode blocks 2311, and each second electrode block 2311 is electrically connected through the connecting portion 4.

[0056] The second electrode layer 23 also includes a bridging portion 5 located between adjacent second electrodes 231 and insulated from the second electrodes 231 in the same layer, and each fourth electrode block 3311 is electrically connected through the bridging portion 5.

[0057] In specific implementation, in the touch panel provided in the embodiments of the present invention, such as Figure 1 As shown, the insulating layer 22 has a planar structure, and the piezoelectric layer 32 includes a plurality of piezoelectric parts 321, which are located between the second electrode block 2311 and the fourth electrode block 3311.

[0058] In specific implementation, in the touch panel provided in the embodiments of the present invention, such as Figure 3 As shown, the tactile sensors (31, 32, and 33) are located between the touch structure (21, 22, and 23) and the substrate 1, with the first electrode layer 21 and the fourth electrode layer 33 being reused. This saves the fabrication of one electrode layer, simplifies the manufacturing process, reduces module thickness, saves production costs, and improves production efficiency. Specifically, the first electrode layer 21 and the fourth electrode layer 33 can serve as driving electrodes Tx, the second electrode layer 23 serves as the sensing electrode Rx of the touch structure, and the third electrode layer 31 is grounded, thereby integrating touch functionality and tactile reproduction functionality.

[0059] In specific implementation, in the touch panel provided in the embodiments of the present invention, such as Figure 3 and Figure 4 As shown, Figure 4 for Figure 3 A top view of the middle part of the film layer shows that the first electrode layer 21 includes a plurality of first electrodes 211 extending along the first direction X, and each first electrode 211 includes a plurality of first electrode blocks 2111; the second electrode layer 23 includes a plurality of second electrodes 231 extending along the second direction Y, and each second electrode 231 includes a plurality of second electrode blocks 2311; the first direction X and the second direction Y are arranged intersecting.

[0060] The first electrode layer 21 also includes a connecting portion 4 located between adjacent first electrode blocks 2111, and each first electrode block 2111 is electrically connected through the connecting portion 4;

[0061] The first electrode layer 21 also includes a bridging portion 5 located between adjacent first electrodes 211 and insulated from the first electrodes 211 in the same layer, and each second electrode block 2311 is electrically connected through the bridging portion 5.

[0062] In specific implementation, in the touch panel provided in the embodiments of the present invention, such as Figure 3 As shown, the piezoelectric layer 32 has a planar structure, and the insulating layer 22 includes a plurality of insulating portions 221, which are located between the first electrode block 2111 and the second electrode block 2311.

[0063] In specific implementation, in the touch panel provided in the embodiments of the present invention, such as Figure 5 As shown, the third electrode layer 31 is reused with the first electrode layer 21, the piezoelectric layer 32 is reused with the insulating layer 22, and the fourth electrode layer 33 is reused with the second electrode layer 23. Since PZT is an excellent ferroelectric material with high dielectric constant, it is currently widely used as the piezoelectric layer material in tactile sensors. Therefore, PZT can also serve as an excellent intermediate layer (i.e., insulating layer) for capacitive sensing. This saves the fabrication of two electrode layers and one insulating layer, simplifying the manufacturing process, reducing module thickness, saving production costs, and improving production efficiency. Specifically, the third electrode layer 31 and the first electrode layer 21 can serve as the driving electrode Tx, and the fourth electrode layer 33 and the second electrode layer 23 can serve as the sensing electrode Rx of the touch structure, thereby integrating touch functionality and tactile reproduction functionality.

[0064] In specific implementation, in the touch panel provided in the embodiments of the present invention, such as Figure 5 and Figure 6 As shown, Figure 6 for Figure 5 A top view of the middle part of the film layer shows that the third electrode layer 31 includes a plurality of third electrodes 311 extending along the first direction X, and each third electrode 311 includes a plurality of third electrode blocks 3111; the fourth electrode layer 33 includes a plurality of fourth electrodes 331 extending along the second direction Y, and each fourth electrode 331 includes a plurality of fourth electrode blocks 3311; the first direction X and the second direction Y are arranged intersecting.

[0065] The third electrode layer 31 also includes a connecting portion 4 located between adjacent third electrode blocks 3111, and each third electrode block 3111 is electrically connected through the connecting portion.

[0066] The third electrode layer 31 also includes a bridging portion 5 located between adjacent third electrodes 311 and insulated from the third electrodes 311 in the same layer, and each fourth electrode block 3311 is electrically connected through the bridging portion 5.

[0067] In specific implementation, in the touch panel provided in the embodiments of the present invention, such as Figure 5 As shown, the piezoelectric layer 32 includes a plurality of piezoelectric parts 321, which are located between the third electrode block 3111 and the fourth electrode block 3311.

[0068] In specific implementation, the electrode layer can be made of indium tin oxide (ITO), indium zinc oxide (IZO), or one of titanium-gold (Ti-Au) alloy, titanium-aluminum-titanium (Ti-Al-Ti) alloy, or titanium-molybdenum (TiMo) alloy. In addition, it can be made of one of titanium (Ti), gold (Au), silver (Ag), molybdenum (Mo), copper (Cu), tungsten (W), or chromium (Cr). Those skilled in the art can set the electrode layer according to the actual application needs, and no limitation is made here.

[0069] Of course, in addition to the various film layers mentioned above, other film layers can also be set for this touch panel according to the actual application.

[0070] The touch panel provided in this invention can be applied to fields such as medical devices, automotive electronics, and motion tracking systems. It is particularly suitable for wearable devices, external or implantable medical monitoring and treatment, or applications in fields such as artificial intelligence-based electronic skin. Specifically, the touch panel can be applied to touch panels that generate vibration and mechanical properties, such as brake pads, keyboards, mobile terminals, game controllers, and automotive components.

[0071] Based on the same inventive concept, embodiments of the present invention also provide a driving method for driving the aforementioned touch panel, such as... Figure 7 As shown, it includes:

[0072] S701. In the initial stage of touch detection, the touch position is detected by loading a scanning drive signal onto the touch structure.

[0073] S702. When a touch position is detected, a mixed signal of scanning drive signal and vibration signal is loaded onto the electrode layer that is reused in the touch structure and the tactile sensor. The touch position is detected by the touch structure and the tactile sensor forms a standing wave to realize tactile reproduction.

[0074] The following is based on Figure 1 Taking the touch panel shown as an example, the driving method of the touch panel provided in the embodiment of the present invention will be described:

[0075] The piezoelectric layer vibration of a typical tactile sensor has a specific frequency limitation, which is related to the structure. To avoid auditory interference, the resonant frequency of the piezoelectric layer is generally set to >20kHz. This frequency is higher than the scanning drive signal of the touch structure. The scanning drive signal Tx of a traditional touch structure is <10kHz. After the touch structure and tactile sensor are integrated, two types of Tx driving are generated: one for the normal touch structure and the other for the Tx of the touch sensor. normal With the driving Tx of the tactile sensor PZT These two signals are like Figure 8A and Figure 8B As shown, these correspond to signal detection under different states, where... Figure 8A The scanning drive signal Tx for a normal touch structure normal , Figure 8B The tactile vibration drive signal Tx of the tactile sensor PZT Tx normal With Tx PZT The fundamental frequencies are equal, because Tx PZT High frequency, Tx PZT The duty cycle is less than Tx normal Tx normal With Tx PZT Mixed signals such as Figure 8C As shown.

[0076] In the initial stage of touch detection, when the touchscreen is unresponsive or has no finger touch, a scanning drive signal is applied to the touch structure to read the sensing signal and detect the touch position, i.e., using Tx. normal With Rx normal Determine finger position, such as Figure 9A As shown. Specifically, as Figure 10 As shown, Figure 10 This is a top-view diagram of multiple Tx and Rx signals. The embedded controller (i.e., IC) loads the scan drive signal to Tx and reads the Rx signal to realize the finger position determination.

[0077] When a touch position is detected, i.e., when a finger enters a specific coordinate position, a mixed signal of scanning drive signal and vibration signal is applied to the electrode layer that is multiplexed in the touch structure and tactile sensor. That is, Tx is changed to a mixed waveform of PZT touch waveform and detection scan signal. The touch position is detected through the touch structure, i.e., through Rx. PZT It detects the position of the finger and reproduces the tactile sensation through standing waves formed by a tactile sensor, such as... Figure 9B As shown.

[0078] If Rx PZT Leaving the response range, i.e., Rx PZT If the reading remains unchanged, Tx will revert to the original touch scan drive signal Tx. noramal .

[0079] In summary, the embodiments of the present invention provide a touch panel in which the tactile sensor uses a thin-film piezoelectric material as an actuator and integrates the tactile sensor with the touch structure. By using different waveforms and corresponding capacitance characteristics, a solution is achieved to drive touch and vibration in a time-division manner and detect finger position, with the two not interfering with each other.

[0080] Based on the same inventive concept, this invention also provides a touch device, including: a display device, and a touch panel as described above located on the light-emitting side of the display device. The substrate in the touch panel is reused as a cover plate in the touch device, and the surface of the substrate away from the display device is the touch surface. Since the principle by which this touch device solves the problem is similar to that of the aforementioned touch panel, the implementation of this touch device can refer to the implementation of the aforementioned touch panel, and repeated details will not be elaborated further. This touch device can be any product or component with display or touch functionality, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0081] In specific implementation, the aforementioned display device can be a liquid crystal display (LCD), an organic light-emitting diode display (OLED), or other display devices, without limitation.

[0082] In specific implementations, the touch device provided in the embodiments of this disclosure may also include other film layers known to those skilled in the art, which will not be described in detail here.

[0083] In practical implementation, the touch device can determine the location of human touch, thereby generating corresponding vibration waveforms, amplitudes, and frequencies, enabling human-computer interaction. Of course, touch devices can also be applied in fields such as medical care, automotive electronics, and motion tracking systems, depending on actual needs, which will not be detailed here.

[0084] This invention provides a touch panel and its driving method and touch device. The touch panel includes a substrate, and a touch structure and a tactile sensor stacked on the substrate. The touch structure includes a first electrode layer, an insulating layer, and a second electrode layer stacked sequentially on the substrate. The tactile sensor includes a third electrode layer, a piezoelectric layer, and a fourth electrode layer stacked sequentially on the substrate. At least one electrode layer in the tactile sensor and the touch structure is reused. The touch panel provided by this invention adopts an integrated structure of tactile sensor and touch structure, enabling touch functionality and tactile reproduction. Furthermore, the reuse of at least one electrode layer in the tactile sensor and the touch structure saves the fabrication of at least one electrode layer, simplifies the manufacturing process, reduces module thickness, saves production costs, and improves production efficiency.

[0085] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0086] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if these modifications and variations to the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A touch panel, characterized in that, include: A substrate, and a touch structure and a touch sensor stacked on the substrate; The touch structure includes a first electrode layer, an insulating layer, and a second electrode layer sequentially stacked on the substrate. The tactile sensor includes a third electrode layer, a piezoelectric layer, and a fourth electrode layer sequentially stacked on the substrate; the material of the piezoelectric layer is lead zirconate titanate (PZT). The tactile sensor and at least one electrode layer in the touch structure are reused. The tactile sensor and at least one electrode layer in the touch structure are reused, including: The touch structure is located between the touch sensor and the substrate, and the second electrode layer and the third electrode layer are reused. The second electrode layer includes a plurality of second electrodes extending along a first direction, each second electrode including a plurality of second electrode blocks; the fourth electrode layer includes a plurality of fourth electrodes extending along a second direction, each fourth electrode including a plurality of fourth electrode blocks; the first direction and the second direction are intersecting. The second electrode layer further includes a connecting portion located between adjacent second electrode blocks, and each second electrode block is electrically connected through the connecting portion; The second electrode layer also includes a bridging portion located between adjacent second electrodes and insulated from the second electrodes in the same layer, and each of the fourth electrode blocks is electrically connected through the bridging portion.

2. The touch panel as described in claim 1, characterized in that, The insulating layer has a planar structure, and the piezoelectric layer includes multiple piezoelectric parts located between the second electrode block and the fourth electrode block.

3. The touch panel as described in claim 1, characterized in that, The tactile sensor and at least one electrode layer in the touch structure are reused, including: The tactile sensor is located between the touch structure and the substrate, and the first electrode layer and the fourth electrode layer are reused.

4. The touch panel as described in claim 3, characterized in that, The first electrode layer includes a plurality of first electrodes extending along a first direction, each first electrode including a plurality of first electrode blocks; the second electrode layer includes a plurality of second electrodes extending along a second direction, each second electrode including a plurality of second electrode blocks; the first direction and the second direction are intersecting. The first electrode layer further includes a connecting portion located between adjacent first electrode blocks, and each first electrode block is electrically connected through the connecting portion; The first electrode layer further includes a bridging portion located between adjacent first electrodes and insulated from the first electrodes in the same layer, and each second electrode block is electrically connected through the bridging portion.

5. The touch panel as described in claim 4, characterized in that, The piezoelectric layer has a planar structure, and the insulating layer includes multiple insulating portions located between the first electrode block and the second electrode block.

6. The touch panel as described in claim 1, characterized in that, The tactile sensor and at least one electrode layer in the touch structure are reused, including: The third electrode layer is reused with the first electrode layer, the piezoelectric layer is reused with the insulating layer, and the fourth electrode layer is reused with the second electrode layer.

7. The touch panel as described in claim 6, characterized in that, The third electrode layer includes a plurality of third electrodes extending along a first direction, each of the third electrodes including a plurality of third electrode blocks; the fourth electrode layer includes a plurality of fourth electrodes extending along a second direction, each of the fourth electrodes including a plurality of fourth electrode blocks; the first direction and the second direction are intersecting. The third electrode layer further includes a connecting portion located between adjacent third electrode blocks, and each third electrode block is electrically connected through the connecting portion; The third electrode layer further includes a bridging portion located between adjacent third electrodes and insulated from the third electrodes in the same layer, and each of the fourth electrode blocks is electrically connected through the bridging portion.

8. The touch panel as described in claim 7, characterized in that, The piezoelectric layer includes multiple piezoelectric parts, which are located between the third electrode block and the fourth electrode block.

9. A touch device, characterized in that, include: The display device and the touch panel as described in any one of claims 1-8 located on the light-emitting side of the display device, wherein the substrate in the touch panel is reused as the cover plate in the touch device, and the surface of the substrate away from the display device is the touch surface.

10. A driving method for driving a touch panel as described in any one of claims 1-8, characterized in that, include: In the initial stage of touch detection, the touch position is detected by loading a scanning drive signal onto the touch structure; When a touch position is detected, a mixed signal of scanning drive signal and vibration signal is applied to the electrode layer that is reused in the touch structure and the tactile sensor. The touch position is detected by the touch structure, and the tactile sensor forms a standing wave to realize tactile reproduction.

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