Display panel and display device

Abstract

The application provides a display panel and a display device, and belongs to the technical field of display, and comprises a substrate, a driving circuit layer arranged on one side of the substrate, a pixel definition layer arranged on the side, away from the substrate, of the driving circuit layer, wherein the material of the pixel definition layer comprises piezoelectric material, a plurality of touch structures arranged on the substrate, wherein the touch structure comprises a first transmitting electrode and a first receiving electrode, the first receiving electrode is arranged between the pixel definition layer and the driving circuit layer, and the first transmitting electrode is arranged on the side, away from the substrate, of the pixel definition layer; wherein the orthographic projection of the first receiving electrode on the substrate is located in the orthographic projection range of the pixel definition layer on the substrate, and the orthographic projection of the first transmitting electrode on the substrate at least partially overlaps with the orthographic projection of the pixel definition layer on the substrate. Through the display panel and the display device provided by the application, the overall thickness and the preparation cost of the display panel can be reduced while realizing the touch function.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a display panel and a display device. Background Technology

[0002] OLED (Organic Light) Organic light-emitting diode (OLED) display products have advantages such as self-illumination, high brightness, wide viewing angle, fast response speed, low energy consumption, and flexible display, and are widely used in different scenarios.

[0003] Currently, OLED display products typically need to integrate touch functionality, which increases the overall thickness and manufacturing process of the display product due to the corresponding film layers. Summary of the Invention

[0004] This application provides a display panel and a display device that aim to achieve touch functionality while reducing the overall thickness and manufacturing cost of the display panel.

[0005] The first aspect of this application provides a display panel, including: Substrate; A driving circuit layer is disposed on one side of the substrate, and the driving circuit layer includes a plurality of first thin-film transistors; A pixel defining layer is disposed on the side of the driving circuit layer opposite to the substrate. The pixel defining layer defines a plurality of opening regions on the substrate. The material of the pixel defining layer includes a piezoelectric material. Multiple touch structures are disposed on the substrate. Each touch structure includes a first transmitting electrode and a first receiving electrode. The first receiving electrode is disposed between the pixel defining layer and the driving circuit layer, and the first transmitting electrode is disposed on the side of the pixel defining layer opposite to the substrate. Wherein, the orthographic projection of the first receiving electrode on the substrate is located within the orthographic projection range of the pixel defining layer on the substrate, and the orthographic projection of the first transmitting electrode on the substrate at least partially overlaps with the orthographic projection of the pixel defining layer on the substrate.

[0006] Optionally, the display panel further includes: A first metal layer is disposed between the driving circuit layer and the pixel defining layer; The touch structure further includes a first receiving electrode trace and a first transmitting electrode trace, wherein the first receiving electrode trace is electrically connected to the first receiving electrode and the first transmitting electrode trace is electrically connected to the first transmitting electrode. The first receiving electrode trace and the first transmitting electrode trace are disposed on the same layer as the first metal layer, and the first receiving electrode trace and the first transmitting electrode trace are connected to the touch chip of the display panel.

[0007] Optionally, at least one fingerprint recognition area is also included within the display area of ​​the display panel; The display panel further includes multiple fingerprint recognition structures within the fingerprint recognition area. Each fingerprint recognition structure includes a second transmitting electrode and a second receiving electrode. The second receiving electrode is disposed between the pixel defining layer and the driving circuit layer, and the second transmitting electrode is disposed on the side of the pixel defining layer facing away from the substrate. Wherein, the orthographic projection of the second receiving electrode on the substrate is located within the orthographic projection range of the pixel defining layer on the substrate, and the orthographic projection of the second emitting electrode on the substrate at least partially overlaps with the orthographic projection of the pixel defining layer on the substrate.

[0008] Optionally, the display panel further includes: A first metal layer is disposed between the driving circuit layer and the pixel defining layer; The fingerprint recognition structure further includes a second thin-film transistor, a second receiving electrode trace, a second transmitting electrode trace, and a recognition electrode. The second receiving electrode trace is electrically connected to the second receiving electrode, and the second transmitting electrode trace is electrically connected to the second transmitting electrode. The second receiving electrode is connected to the source of the second thin-film transistor, and the identification electrode is connected to the drain of the second thin-film transistor. The second receiving electrode trace, the second transmitting electrode trace, and the recognition electrode are disposed on the same layer as the first metal layer, and the second transmitting electrode trace is connected to the fingerprint recognition chip of the display panel.

[0009] Optionally, the touch structure and the fingerprint recognition structure array are distributed within the fingerprint recognition area.

[0010] Optionally, the display panel further includes: An insulating layer is disposed on the side of the first emitting electrode away from the substrate.

[0011] Optionally, the display panel further includes: A plurality of first electrodes are disposed on the substrate, and the first electrodes are located within the opening region; The first electrode and the first receiving electrode are disposed in the same layer.

[0012] Optionally, the display panel further includes: A light-emitting layer is disposed on the side of the pixel defining layer opposite to the substrate. The light-emitting layer includes a plurality of light-emitting pixels, and each light-emitting pixel corresponds to one of the opening regions.

[0013] Optionally, the display panel further includes: An encapsulation layer is disposed on the side of the pixel defining layer opposite to the substrate.

[0014] A second aspect of this application provides a display device, including a display panel as provided in the first aspect of this application.

[0015] Beneficial effects: This application provides a display panel and a display device. The display panel includes a substrate, a driving circuit layer, a pixel defining layer, and multiple touch structures. The pixel defining layer is made of a piezoelectric material. The touch structures include a first emitting electrode and a first receiving electrode. The first receiving electrode is disposed between the pixel defining layer and the driving circuit layer. The orthographic projection of the first receiving electrode and the first emitting electrode on the substrate is located within the orthographic projection range of the pixel defining layer on the substrate. The first emitting electrode is disposed on the side of the pixel defining layer away from the substrate, and the orthographic projection of the first emitting electrode on the substrate at least partially overlaps with the orthographic projection of the pixel defining layer on the substrate. In this way, the pixel defining layer made of piezoelectric material and the first emitting electrode and the first receiving electrode located on both sides of the pixel defining layer can generate corresponding electrical signals when the user touches the display panel, thereby realizing the touch function without the need for other related film layers, thereby reducing the thickness of the display panel and reducing the manufacturing cost. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the planar structure of a display panel according to an embodiment of this application; Figure 2 yes Figure 1 Schematic diagram of the structure of section BB; Figure 3 This is a schematic diagram of a planar design of a pixel structure in a display panel according to an embodiment of this application; Figure 4 This is a schematic diagram of a planar structure of a display panel including a fingerprint recognition area according to an embodiment of this application; Figure 5 yes Figure 4Schematic diagram of the CC section; Figure 6 This is a design diagram of a pixel circuit in a display panel according to an embodiment of this application. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Reference Figure 1 and Figure 2 As shown, this application discloses a display panel, which includes a substrate 10, a driving circuit layer, a light-emitting layer, and multiple touch structures.

[0020] Specifically, the substrate 10 can be a flexible substrate or a rigid substrate. When the substrate 10 is a flexible substrate, the display panel can have properties such as being bendable or flexible; when the substrate 10 is a rigid substrate, the rigidity requirements of the display panel can be met; the specific performance of the substrate 10 is determined according to the actual needs of the product.

[0021] Additionally, the substrate 10 may include a single-layer structure or a multi-layer structure. Exemplarily, the substrate 10 may include a polyimide layer and a buffer layer 11 stacked sequentially; in other embodiments, the substrate 10 may also include multiple polyimide layers and buffer layers 11 stacked sequentially. The buffer layer 11 may be made of materials such as silicon nitride or silicon oxide to achieve the effect of blocking water and oxygen and blocking alkaline ions. It should be noted that the structure of the substrate 10 is not limited to this, and can be determined according to actual needs in specific applications.

[0022] Reference Figure 2 As shown, the driving circuit layer may include a plurality of first thin-film transistors 20. Exemplarily, the driving circuit layer may be a structure such as 3T1C, 4T1C, 5T1C, 5T2C, 6T1C, 7T1C, or 8T1C. Here, T represents a transistor, the number preceding T indicates the number of transistors, and C represents a capacitor, the number preceding C indicates the number of capacitors.

[0023] For example, the first thin-film transistor 20 in the driving circuit layer can be a low-temperature polysilicon transistor, or an oxide transistor, or a combination of both. The active layer 21 of the low-temperature polysilicon transistor is made of low-temperature polysilicon (LTPS). The active layer 21 of the silicon (LTPS) and oxide transistors uses oxide semiconductors. Low-temperature polycrystalline silicon transistors have advantages such as high mobility and fast charging, while oxide transistors have advantages such as low leakage current. When low-temperature polycrystalline silicon transistors and oxide transistors are integrated on a display panel, a low-temperature polycrystalline oxide (LTPO) display panel can be formed. By utilizing the advantages of both, the refresh rate of the display panel can be switched to achieve low-frequency driving, which helps to reduce power consumption and improve display quality.

[0024] Reference Figure 2 As shown, the first thin-film transistor 20 can be a top-gate type. The first thin-film transistor 20 may include an active layer 21, a gate insulating layer 22, a gate 23, an interlayer dielectric layer 24, a source 25, and a drain 26. Specifically, the active layer 21 may be formed on the buffer layer 11, the gate insulating layer 22 covers the buffer layer 11 and the active layer 21, the gate 23 is formed on the side of the gate insulating layer 22 away from the active layer 21, the interlayer dielectric layer 24 covers the gate insulating layer 22, and the source 25 and drain 26 are formed on the side of the interlayer dielectric layer 24 away from the substrate 10 and are located on opposite sides of the gate 23, respectively. The source 25 and drain 26 can contact the opposite sides of the active layer 21 through vias (e.g., metal vias). It should be understood that the first thin-film transistor 20 can also be a bottom-gate type.

[0025] The gate 23 may be made of metallic or alloy materials, such as molybdenum, aluminum, and titanium. The source 25 and drain 26 may be made of metallic or alloy materials, such as a single-layer or multi-layer structure of metal formed from molybdenum, aluminum, and titanium. For example, the multi-layer structure is a multi-metal stack, such as a titanium, aluminum, and titanium three-layer metal stack (Al / Ti / Al).

[0026] Reference Figure 2 As shown in the embodiment of this application, the first thin film transistor 20 may further include a second metal layer 28. The second metal layer 28 is disposed on one side of the substrate 10, and the orthographic projection of the active layer 21 on the substrate 10 is located within the orthographic projection range of the second metal layer 28 on the substrate 10. The second metal layer 28 can play a light-shielding role to improve the light-emitting effect of the display panel.

[0027] Reference Figure 2 and Figure 3 As shown, the light-emitting layer includes a first electrode 41 and a pixel defining layer 42 sequentially formed on the interlayer dielectric layer 24. It should be understood that the display panel may also include a light-emitting part 43 and a second electrode 44.

[0028] Specifically, a planarization section can be fabricated before the light-emitting layer. This planarization section can be a single-layer structure or a multi-layer structure. This planarization section is typically made of organic materials, such as photoresist, acrylic polymers, and silicon polymers. The first electrode 41 can be electrically connected to the drain 26 of the first thin-film transistor 20 via a metal via. The first electrode 41 can be the anode, and can be made of materials such as ITO (indium tin oxide), indium zinc oxide (IZO), and zinc oxide (ZnO). The pixel defining layer 42 can cover the planarization section. The pixel defining layer 42 has an opening area exposing the first electrode 41. The light-emitting section 43 is located within the opening area and formed on the first electrode 41. The light-emitting section 43 can include small-molecule organic materials or polymeric organic materials, and can be fluorescent... The light-emitting material or phosphorescent light-emitting material can emit red, green, blue, or white light, etc.; and, depending on the actual needs, in different examples, the light-emitting part 43 can further include functional layers such as an electron injection layer, an electron transport layer, a hole injection layer, and a hole transport layer; the second electrode 44 covers the light-emitting part 43, and the polarity of the second electrode 44 is opposite to that of the first electrode 41; the second electrode 44 can be a cathode, and the cathode can be made of metal materials such as lithium (Li), aluminum (Al), magnesium (Mg), and silver (Ag).

[0029] It should be noted that the first electrode 41, the light-emitting part 43, and the second electrode 44 can constitute a light-emitting sub-pixel. The portion of the display panel located in the display area AA can include multiple light-emitting sub-pixels arranged in an array. Furthermore, it should be noted that the first electrodes 41 of each light-emitting sub-pixel are independent of each other, and the second electrodes 44 of each light-emitting sub-pixel are connected across their entire surface; that is, the second electrode 44 is a full-surface structure disposed on the display panel, serving as a common electrode for multiple display devices.

[0030] Reference Figure 2As shown in this embodiment, the display panel further includes a first metal layer 27, which is disposed between the driving circuit layer and the pixel defining layer 42. The first metal layer 27 may include a transition electrode 29, and the first electrode 41 may be electrically connected to the drain electrode 26 through the transition electrode. When the first electrode 41 is electrically connected to the drain electrode 26 through the transition electrode 29, the planarization portion may be a double-layer structure, specifically including a first planarization film layer 33 and a second planarization film layer 34 formed sequentially. In addition, a first passivation film layer 31 may be formed between the first planarization film layer 33 and the interlayer dielectric layer 24, and a second passivation film layer 32 may be formed between the first planarization film layer 33 and the second planarization film layer 34. The first passivation film layer 31 and the second passivation film layer 32 may be made of silicon oxide, silicon nitride, or silicon oxynitride, etc. Material formation: A first passivation film layer 31 covers the source electrode 25 and the drain electrode 26, and a second passivation film layer 32 covers the first metal layer 27; a transition electrode 29 is formed between the first planarization film layer 33 and the second planarization film layer 34, and is electrically connected to the drain electrode 26 through vias (e.g., metal vias) on the first planarization film layer 33 and the first passivation film layer 31; while the first electrode 41 is electrically connected to the transition electrode 29 through vias (e.g., metal vias) on the second planarization film layer 34 and the second passivation film layer 32.

[0031] In this embodiment of the application, in order to realize the touch function of the display panel, a piezoelectric material is selected to make the pixel defining layer 42. When the piezoelectric material is subjected to mechanical force (e.g. pressure), it can convert the mechanical force signal into an electrical signal.

[0032] At the same time, refer to Figure 2 As shown, in this embodiment of the application, multiple touch structures are provided in the display area AA of the display panel. Each touch structure includes a first emitting electrode 51 and a first receiving electrode 52. These multiple touch structures can be arrayed within the display area AA. Specifically, the first receiving electrode 52 is disposed between the pixel defining layer 42 and the driving circuit layer. Specifically, the first receiving electrode 52 is disposed on the side of the second passivation film layer 32 facing away from the substrate 10. The first emitting electrode 51 is disposed on the side of the pixel defining layer 42 facing away from the substrate 10. Furthermore, the orthographic projection of the first receiving electrode 52 onto the substrate 10 is within the orthographic projection range of the pixel defining layer 42 onto the substrate 10, and the orthographic projection of the first emitting electrode 51 onto the substrate 10 partially overlaps with the orthographic projection of the pixel defining layer 42 onto the substrate 10. It should be noted that the first receiving electrode 52 can be disposed in the same layer as the first electrode 41. The first emitting electrode 51 can include a first portion covering the pixel defining layer 42 and a second portion covering the second passivation film layer 32. Meanwhile, an insulating layer 55 is provided on the side of the first emitting electrode 51 away from the substrate 10 to achieve insulation between the first emitting electrode 51 and the second electrode 44. The material of the insulating layer 55 can be a nitride.

[0033] In addition, refer to Figure 2 As shown, the touch structure also includes a first receiving electrode trace 54 and a first transmitting electrode trace 53. The first receiving electrode trace 54 is electrically connected to the first receiving electrode 52 of the touch structure, and the first transmitting electrode trace 53 is electrically connected to the first transmitting electrode 51 of the touch structure. At the same time, the first receiving electrode trace 54 and the first transmitting electrode trace 53 can be disposed on the same layer as the first metal layer 27. The first receiving electrode trace 54 and the first transmitting electrode trace 53 are connected to the touch chip of the display panel.

[0034] Reference Figure 6 As shown, during the use of this display panel, when the user touches the display area AA of the display panel, the user's touch on the screen will affect the pixel defining layer 42 (i.e., the piezoelectric material) made of piezoelectric material. Figure 6 Pressure is generated in the piezoelectric layer (in the image), which causes the pixel defining layer 42 made of piezoelectric material to generate an electrical signal, thereby causing a change in the voltage between the first transmitting electrode 51 (Tx1) and the first receiving electrode 52 (Rx1). At this time, the electrical signal is transmitted to the touch chip through the first receiving electrode trace 54 and the first transmitting electrode trace 53, which in turn causes the touch chip to generate a corresponding control signal in response to the user's touch, so as to control the display panel to display the corresponding content, thus realizing the touch control of the display panel.

[0035] The display panel provided in this application embodiment utilizes a pixel defining layer 42 made of piezoelectric material and a first emitting electrode 51 and a first receiving electrode 52 located on both sides of the pixel defining layer 42. When a user touches the display panel, a corresponding electrical signal is generated, thereby realizing the touch function. No other related film layers are required, which can reduce the thickness of the display panel and reduce the manufacturing cost.

[0036] Reference Figure 4 As shown, in an optional embodiment, this application also provides a display panel, wherein the display area AA further includes at least one fingerprint recognition area ZW.

[0037] Specifically, the display panel also includes multiple fingerprint recognition structures within the fingerprint recognition area ZW. These structures can be used to recognize the user's fingerprint to control related functions. It should be noted that a touch control structure is also provided within the fingerprint recognition area ZW, and these structures are arranged in an array alongside the fingerprint recognition structures.

[0038] Reference Figure 5As shown in this embodiment, the fingerprint recognition structure includes a second transmitting electrode 61 and a second receiving electrode 62. The second receiving electrode 62 is disposed between the pixel defining layer 42 and the driving circuit layer. Specifically, the second receiving electrode 62 is disposed on the side of the second passivation film layer 32 facing away from the substrate 10, and the second transmitting electrode 61 is disposed on the side of the pixel defining layer 42 facing away from the substrate 10. Furthermore, the orthogonal projection of the second receiving electrode 62 onto the substrate 10 lies within the orthogonal projection range of the pixel defining layer 42 onto the substrate 10, and the orthogonal projection of the second transmitting electrode 61 onto the substrate 10 partially overlaps with the orthogonal projection of the pixel defining layer 42 onto the substrate 10. It should be noted that the second receiving electrode 62 can be disposed in the same layer as the first electrode 41, and the second transmitting electrode 61 can include a third portion covering the pixel defining layer 42 and a fourth portion covering the second passivation film layer 32. Meanwhile, an insulating layer (not shown in the figure, but the same film as the insulating layer 55 on the first emitting electrode 51) is provided on the side of the second emitting electrode 61 away from the substrate 10 to achieve insulation between the second emitting electrode 61 and the second electrode 44. The material of the insulating layer can be a nitride.

[0039] In addition, refer to Figure 5 As shown, the fingerprint recognition structure also includes a second thin-film transistor 63, a second receiving electrode trace 64, a second transmitting electrode trace 65, and a recognition electrode 66. The second thin-film transistor 63 is fabricated simultaneously with the first thin-film transistor 20. The second receiving electrode trace 64 is electrically connected to the second receiving electrode 62 of the fingerprint recognition structure, and the second transmitting electrode trace 65 is electrically connected to the second transmitting electrode 61 of the fingerprint recognition structure. Both the second receiving electrode trace 64 and the second transmitting electrode trace 65 can be disposed on the same layer as the first metal layer 27. The second receiving electrode trace 64 is connected to the source electrode 25 of the second thin-film transistor 63. The recognition electrode 66 is disposed on the same layer as the first metal layer 27 and is connected to the drain electrode 26 of the second thin-film transistor 63. The second transmitting electrode trace 65 is connected to the fingerprint recognition chip of the display panel.

[0040] Reference Figure 6As shown, during fingerprint recognition, the fingerprint recognition chip pre-applies an initial voltage to the second transmitting electrode 61 (Tx2) and the second receiving electrode 62 (Rx2). When the user's finger touches the fingerprint recognition area ZW, the pressure applied by the finger to the display panel is transmitted to the pixel defining layer 42 made of piezoelectric material, causing the pixel defining layer 42 between the second transmitting electrode 61 and the second receiving electrode 62 to generate an electrical signal. This causes a change in the voltage difference between the second transmitting electrode 61 and the second receiving electrode 62. At this time, the electrical signal is transmitted to the second thin-film transistor 63 and the recognition electrode (Vread), and the fingerprint recognition chip controls the emission of microwave signals to identify the user's fingerprint information, thereby realizing fingerprint recognition control.

[0041] The display panel provided in this application embodiment utilizes a pixel defining layer 42 made of piezoelectric material and a second emitting electrode 61 and a second receiving electrode 62 located on both sides of the pixel defining layer 42. When a user touches the display panel, a corresponding electrical signal is generated, thereby realizing the fingerprint recognition function. No other related film layers are required, which can reduce the thickness of the display panel and reduce the manufacturing cost.

[0042] Reference Figure 2 As shown, in one embodiment, the display panel may further include an encapsulation layer 70 and a cover plate 80. The encapsulation layer 70 is disposed on the side of the light-emitting layer away from the substrate. The encapsulation layer 70 may include a first inorganic encapsulation film layer, an organic encapsulation film layer, and a second inorganic encapsulation film layer stacked sequentially. The first and second inorganic encapsulation film layers may be obtained by two separate chemical vapor deposition processes or by physical vapor deposition. The materials of the first and second inorganic encapsulation film layers may be inorganic materials such as silicon nitride and silicon oxide. The organic encapsulation film layer is manufactured by inkjet printing or by spraying. The materials of the organic encapsulation film layer may be acrylic polymers, silicon polymers, or other materials. The cover plate 80 is disposed on the side of the encapsulation layer 70 away from the substrate 10. The cover plate 80 may be made of glass and is connected to the encapsulation layer 70 by optical adhesive.

[0043] Based on the same inventive concept, this application discloses a display device, including a display panel as described above in the embodiments of this application.

[0044] Specifically, the display device may include computer monitors, televisions, billboards, laser printers with display functions, telephones, mobile phones, personal digital assistants (PDAs), laptops, digital cameras, portable camcorders, viewfinders, vehicles, large walls, theater screens, or stadium signs, etc.

[0045] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0046] It should also be noted that, in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, relational terms such as "first" and "second" 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, nor should they be construed as indicating or implying relative importance. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "includes a..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0047] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand this application, and the content of this specification should not be construed as a limitation of this application. Furthermore, for those skilled in the art, there will be different forms of changes in the specific implementation methods and application scope based on this application. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious changes or modifications derived therefrom are still within the protection scope of this application.

Claims

1. A display panel, characterized in that, include: Substrate; A driving circuit layer is disposed on one side of the substrate, and the driving circuit layer includes a plurality of first thin-film transistors; A pixel defining layer is disposed on the side of the driving circuit layer opposite to the substrate. The pixel defining layer defines a plurality of opening regions on the substrate. The material of the pixel defining layer includes a piezoelectric material. Multiple touch structures are disposed on the substrate. Each touch structure includes a first transmitting electrode and a first receiving electrode. The first receiving electrode is disposed between the pixel defining layer and the driving circuit layer, and the first transmitting electrode is disposed on the side of the pixel defining layer opposite to the substrate. Wherein, the orthographic projection of the first receiving electrode on the substrate is located within the orthographic projection range of the pixel defining layer on the substrate, and the orthographic projection of the first transmitting electrode on the substrate at least partially overlaps with the orthographic projection of the pixel defining layer on the substrate.

2. The display panel according to claim 1, characterized in that, The display panel also includes: A first metal layer is disposed between the driving circuit layer and the pixel defining layer; The touch structure further includes a first receiving electrode trace and a first transmitting electrode trace, wherein the first receiving electrode trace is electrically connected to the first receiving electrode and the first transmitting electrode trace is electrically connected to the first transmitting electrode. The first receiving electrode trace and the first transmitting electrode trace are disposed on the same layer as the first metal layer, and the first receiving electrode trace and the first transmitting electrode trace are connected to the touch chip of the display panel.

3. The display panel according to claim 1, characterized in that: The display panel also includes at least one fingerprint recognition area within its display area; The display panel further includes multiple fingerprint recognition structures within the fingerprint recognition area. Each fingerprint recognition structure includes a second transmitting electrode and a second receiving electrode. The second receiving electrode is disposed between the pixel defining layer and the driving circuit layer, and the second transmitting electrode is disposed on the side of the pixel defining layer facing away from the substrate. Wherein, the orthographic projection of the second receiving electrode on the substrate is located within the orthographic projection range of the pixel defining layer on the substrate, and the orthographic projection of the second emitting electrode on the substrate at least partially overlaps with the orthographic projection of the pixel defining layer on the substrate.

4. The display panel according to claim 3, characterized in that, The display panel also includes: A first metal layer is disposed between the driving circuit layer and the pixel defining layer; The fingerprint recognition structure further includes a second thin-film transistor, a second receiving electrode trace, a second transmitting electrode trace, and a recognition electrode. The second receiving electrode trace is electrically connected to the second receiving electrode, and the second transmitting electrode trace is electrically connected to the second transmitting electrode. The second receiving electrode is connected to the source of the second thin-film transistor, and the identification electrode is connected to the drain of the second thin-film transistor. The second receiving electrode trace, the second transmitting electrode trace, and the recognition electrode are disposed on the same layer as the first metal layer, and the second transmitting electrode trace is connected to the fingerprint recognition chip of the display panel.

5. The display panel according to claim 3, characterized in that: Within the fingerprint recognition area, the touch structure and the fingerprint recognition structure array are distributed.

6. The display panel according to claim 1, characterized in that, The display panel also includes: An insulating layer is disposed on the side of the first emitting electrode away from the substrate.

7. The display panel according to claim 1, characterized in that, The display panel also includes: A plurality of first electrodes are disposed on the substrate, and the first electrodes are located within the opening region; The first electrode and the first receiving electrode are disposed in the same layer.

8. The display panel according to any one of claims 1-7, characterized in that, The display panel also includes: A light-emitting layer is disposed on the side of the pixel defining layer opposite to the substrate. The light-emitting layer includes a plurality of light-emitting pixels, and each light-emitting pixel corresponds to one of the opening regions.

9. The display panel according to any one of claims 1-7, characterized in that, The display panel also includes: An encapsulation layer is disposed on the side of the pixel defining layer opposite to the substrate.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1-9.

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