Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises a display area and a non-display area located at least one side of the display area, and comprises: a substrate located at the display area and the non-display area; a switching circuit located at one side of the substrate and at least at the display area; a first electrode located at one side of the switching circuit away from the substrate and at least at the display area; and a shielding part located at one side of the switching circuit away from the substrate and at least at the display area, the orthographic projection of the shielding part on the substrate at least partially overlaps the orthographic projection of the switching circuit on the substrate, and the signal line connected to the shielding part is different from the signal line connected to the first electrode. The application solves the problem of poor display effect of the display panel caused by coupling crosstalk in the prior art.

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] With the continuous development of technology, display technology is also constantly advancing, and consumers' demands for display products are becoming increasingly higher. Especially in ultra-high frequency displays, consumers have even more stringent requirements for image quality and stability. In high-frequency display scenarios, signal coupling becomes a significant challenge, leading to crosstalk in the display and affecting the user's viewing experience. Coupling refers to the mutual influence between different signals, causing interference or distortion during signal transmission. In display technology, signal coupling can cause problems such as noise, color distortion, and even image blurring. The higher the display frequency, the more severe the signal coupling problem becomes, because high-frequency signals transmit faster, have more complex waveforms, and are more susceptible to external interference. Summary of the Invention

[0003] The main objective of this application is to provide a display panel and a display device to at least solve the problem of poor display effect caused by coupling crosstalk in the prior art.

[0004] To achieve the above objectives, according to one aspect of this application, a display panel is provided, including a display area and a non-display area located on at least one side of the display area, the display panel comprising:

[0005] A substrate is located in the display area and the non-display area;

[0006] A switching circuit is located on one side of the substrate, and at least in the display area;

[0007] The first electrode is located on the side of the switching circuit away from the substrate, and is at least located in the display area;

[0008] A shielding portion is located on the side of the switching circuit away from the substrate and at least in the display area. The orthographic projection of the shielding portion on the substrate at least partially overlaps with the orthographic projection of the switching circuit on the substrate. The signal line connected to the shielding portion is different from the signal line connected to the first electrode.

[0009] According to another aspect of this application, based on the same inventive concept, a display device is also provided, comprising: any of the aforementioned display panels.

[0010] By applying the technical solution of this application, a shielding part is provided on one side of the switching circuit in the display panel, so that the shielding part and the switching circuit overlap in the thickness direction of the display panel. When an electrical signal is applied to the shielding part and the switching circuit, an electric field is formed between them. The electric field attracts charges, causing positive charges to accumulate on one of the shielding part and the switching circuit, and negative charges to accumulate on the other. This forms a shielding capacitor between the shielding part and the switching circuit. The shielding capacitor can isolate the switching circuit from the first electrode, so that at least part of the electric field lines that originally formed parasitic capacitance between the first electrode and the switching circuit preferentially terminate at the plate of the shielding capacitor. This achieves the effect of reducing the electric field lines between the first electrode and the switching circuit, thereby reducing the adverse effects of parasitic capacitance between the first electrode and the switching circuit. In turn, it reduces or even eliminates the coupling effect between the first electrode and the switching circuit caused by parasitic capacitance, alleviates the crosstalk problem caused by the first electrode not being able to recover normal voltage in time after being coupled by the switching circuit, and ensures a better display effect of the display panel. Attached Figure Description

[0011] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0012] Figure 1 A cross-sectional structural schematic diagram of a display panel provided in an embodiment according to this application is shown;

[0013] Figure 2 A cross-sectional structural schematic diagram of another display panel provided in an embodiment according to this application is shown;

[0014] Figure 3 A cross-sectional structural schematic diagram of another display panel provided in an embodiment according to this application is shown;

[0015] Figure 4 A cross-sectional structural schematic diagram of another display panel provided in an embodiment according to this application is shown;

[0016] Figure 5 A cross-sectional structural schematic diagram of another display panel provided in an embodiment according to this application is shown;

[0017] Figure 6 A cross-sectional structural schematic diagram of another display panel provided in an embodiment according to this application is shown;

[0018] Figure 7 A cross-sectional structural schematic diagram of another display panel provided in an embodiment according to this application is shown;

[0019] Figure 8A top perspective view of a display panel provided in an embodiment according to this application is shown;

[0020] Figure 9 A top perspective view of another display panel provided in an embodiment according to this application is shown;

[0021] Figure 10 A top perspective view of another display panel provided in an embodiment according to this application is shown;

[0022] Figure 11 A top perspective view of yet another display panel provided in an embodiment according to this application is shown;

[0023] Figure 12 A top view schematic diagram of a display panel provided in an embodiment according to this application is shown;

[0024] Figure 13 A schematic diagram of a simulation model of a display panel provided in an embodiment of this application is shown;

[0025] Figure 14 Simulated waveforms of Vcom disturbance values ​​are shown for embodiments and comparative examples provided in this application.

[0026] Figure 15 A schematic diagram of the structure of a display device provided in an embodiment of this application is shown.

[0027] The above figures include the following reference numerals:

[0028] 10. Substrate; 11. Switching circuit; 111. Data line; 112. Thin-film transistor; 113. Scan line; 12. First electrode; 121. Third part; 122. Fourth part; 13. Shielding part; 131. First part; 132. Second part; 14. First dielectric layer; 15. Second dielectric layer; 16. Third dielectric layer; 17. Fourth dielectric layer; 18. Trench; 19. Display area; 20. Non-display area; 21. First signal line; 22. Driving circuit; 23. External driving source; 100. Display panel; 200. Display device. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] The inventors discovered that parasitic capacitance exists between the common electrode and the data signal in the display panel, causing signal coupling between them. In high-frequency image driving scenarios, the common electrode cannot recover its normal voltage in time after being coupled by the data signal, resulting in abnormal pixel electric fields, crosstalk in the display, and poor display quality.

[0033] To address the above-mentioned technical problems, embodiments of this application provide a display panel and a display device.

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0035] This embodiment provides a display panel. Figure 1 A cross-sectional structural schematic diagram of a display panel according to an embodiment of this application is shown as an example. The display panel includes a display area and a non-display area located on at least one side of the display area, such as... Figure 1 As shown, the above display panel includes:

[0036] Substrate 10 is located in the aforementioned display area and the aforementioned non-display area;

[0037] The switching circuit 11 is located on one side of the substrate 10 and is at least located in the display area.

[0038] In specific applications, the aforementioned switch circuit 11 may be located only in the aforementioned display area; or the aforementioned switch circuit 11 may be located in both the aforementioned display area and the aforementioned non-display area. The aforementioned switch circuit is used to control the switching and brightness of pixels in the display panel.

[0039] The first electrode 12 is located on the side of the switching circuit 11 away from the substrate 10, and is at least located in the display area;

[0040] In specific applications, the first electrode 12 may be located only in the display area; or the first electrode 12 may be located in both the display area and the non-display area. The first electrode 12 is used to control the deflection of liquid crystal molecules in the display panel.

[0041] The shielding portion 13 is located on the side of the switching circuit 11 away from the substrate 10 and is at least located in the display area. The orthographic projection of the shielding portion 13 on the substrate 10 at least partially overlaps with the orthographic projection of the switching circuit 11 on the substrate 10. The signal line connected to the shielding portion 13 is different from the signal line connected to the first electrode 12. That is, the shielding portion 13 has a signal source that is different from the signal source of the first electrode 12.

[0042] In specific applications, the shielding part 13 may be located only in the display area; or the shielding part 13 may be located in both the display area and the non-display area. The shielding part 13 and the first electrode 12 are located on the same side of the switching circuit 11.

[0043] Through the above embodiments, a shielding part is provided on one side of the switching circuit in the display panel, so that the shielding part and the switching circuit overlap in the thickness direction of the display panel. When an electrical signal is applied to the shielding part and the switching circuit, an electric field is formed between them. The electric field attracts charges, so that positive charges accumulate on one of the shielding part and the switching circuit, and negative charges accumulate on the other. This forms a shielding capacitor between the shielding part and the switching circuit. The shielding capacitor can isolate the switching circuit from the first electrode, so that at least part of the electric field lines that originally formed parasitic capacitance between the first electrode and the switching circuit preferentially terminate at the plate of the shielding capacitor. This achieves the effect of reducing the electric field lines between the first electrode and the switching circuit, thereby reducing the adverse effects of parasitic capacitance between the first electrode and the switching circuit. In addition, it reduces or even eliminates the coupling effect between the first electrode and the switching circuit caused by parasitic capacitance, alleviates the crosstalk problem caused by the first electrode not being able to recover normal voltage in time after being coupled by the switching circuit, and ensures that the display effect of the display panel is better.

[0044] It should be noted that, Figure 1The example shown is merely illustrative of an embodiment where the shielding portion 13 and the first electrode 12 are located in the same film layer. The relative positional relationship between the shielding portion 13 and the first electrode 12 is not limited to this. Figure 1 For example, those skilled in the art can flexibly set the relative positional relationship between the two; and, Figure 1 This illustration only shows, by way of example, the orthographic projection of the switching circuit 11 on the substrate 10 falling within the orthographic projection of the shielding portion 13 on the substrate 10, and the orthographic projection of the first electrode 12 on the substrate 10 not overlapping with the orthographic projection of the switching circuit 11 on the substrate 10. The relative positional relationship of the orthographic projections of the three components on the substrate is not limited to... Figure 1 As an example, those skilled in the art can flexibly set the relative positional relationship of the three orthographic projections.

[0045] Specifically, the orthographic projection of the first electrode 12 on the substrate 10 may or may not overlap with the orthographic projection of the switch circuit 11 on the substrate 10. The overlapping area of ​​the orthographic projection of the first electrode 12 on the substrate 10 and the orthographic projection of the switch circuit 11 on the substrate 10 is a first area, and the overlapping area of ​​the orthographic projection of the shielding portion 13 on the substrate 10 and the orthographic projection of the switch circuit 11 on the substrate 10 is a second area, satisfying at least the following: the first area is smaller than the second area; the distance between the first electrode 12 and the switch circuit 11 in the thickness direction of the display panel is greater than the distance between the shielding portion 13 and the switch circuit 11 in the thickness direction of the display panel. This application ensures that the coupling capacitance between the shield and the switch circuit is greater than that between the first electrode and the switch circuit by limiting the overlapping area of ​​the orthographic projection of the shield and the switch circuit to be greater than that between the first electrode and the switch circuit, and / or by limiting the distance between the shield and the switch circuit to be less than that between the first electrode and the switch circuit. Because the coupling capacitance between the shield and the switch circuit is larger, the electric field lines tend to be distributed between the shield and the switch circuit, which reduces the distribution of electric field lines between the first electrode and the switch circuit. This weakens the coupling effect established between the first electrode and the switch circuit through the electric field lines, thus enabling the shield to effectively shield the coupling effect between the first electrode and the switch circuit.

[0046] In one exemplary embodiment, when the overlapping area of ​​the orthographic projection of the shielding portion 13 and the orthographic projection of the switching circuit 11 is greater than the overlapping area of ​​the orthographic projection of the first electrode 12 and the switching circuit, the distance between the shielding portion 13 and the switching circuit 11 in the thickness direction of the display panel can be less than, equal to, or greater than the distance between the first electrode 12 and the switching circuit 11 in the thickness direction of the display panel, as long as the coupling capacitance between the shielding portion and the switching circuit is greater than the coupling capacitance between the first electrode and the switching circuit.

[0047] In another exemplary embodiment, when the overlapping area of ​​the orthographic projection of the shielding portion 13 and the orthographic projection of the switching circuit 11 is less than or equal to the overlapping area of ​​the orthographic projection of the first electrode 12 and the switching circuit, the distance between the shielding portion 13 and the switching circuit 11 in the thickness direction of the display panel is less than the distance between the first electrode 12 and the switching circuit 11 in the thickness direction of the display panel.

[0048] According to some optional embodiments of this application, such as Figure 2 and Figure 3 As shown, the shielding portion 13 is located between the switching circuit 11 and the first electrode 12. That is, the distance between the shielding portion and the switching circuit is greater than the distance between the first electrode and the switching circuit, making the shielding capacitance between the shielding portion and the switching circuit greater than the electrode capacitance between the first electrode and the switching circuit. A larger capacitance means that an electric field is more easily established between the shielding portion and the switching circuit. This electric field between the shielding portion and the switching circuit will repel and compress the electric field between the first electrode and the switching circuit, weakening the electric field strength between the first electrode and the switching circuit, thereby further ensuring a better electromagnetic shielding effect of the shielding portion. Furthermore, placing the shielding portion between the switching circuit and the first electrode allows for a larger distance between them, thus minimizing the influence of the shielding portion on the pixel electric field formed by the first electrode.

[0049] In some exemplary solutions, such as Figure 2As shown, the display panel further includes: a first dielectric layer 14 located between the switching circuit 11 and the shielding portion 13, and at least located in the display area; and a second dielectric layer 15 located between the shielding portion 13 and the first electrode 12, and at least located in the display area. Both the first dielectric layer and the second dielectric layer serve as isolation and protection. Furthermore, by placing the second dielectric layer between the shielding portion and the first electrode, the distance between the shielding portion and the switching circuit can be further increased to be greater than the distance between the first electrode and the switching circuit, thereby further increasing the shielding capacitance and decreasing the electrode capacitance. This further reduces the coupling effect between the first electrode and the switching circuit, and further reduces display crosstalk caused by the coupling effect.

[0050] In one embodiment, the first dielectric layer and the second dielectric layer are made of the same material. Using the same material to form the first dielectric layer and the second dielectric layer helps simplify the manufacturing process, and the consistent physical and chemical properties of the two dielectric layers contribute to the overall uniformity and reliability of the display panel.

[0051] When the materials of the first dielectric layer and the second dielectric layer are the same, they can be regarded as a single dielectric layer, that is, the shielding part and the first electrode are disposed in the same layer, and the distance from the shielding part to the switching circuit is less than the distance from the first electrode to the switching circuit.

[0052] Specifically, when the first dielectric layer and the second dielectric layer are made of the same material, both the first dielectric layer and the second dielectric layer can be inorganic insulating layers. Alternatively, both the first dielectric layer and the second dielectric layer can be organic insulating layers.

[0053] In another embodiment, the first dielectric layer is an organic insulating layer, and the second dielectric layer is an inorganic insulating layer. In this embodiment, an organic insulating layer is provided between the switching circuit and the shielding part. The organic insulating layer has good electrical insulation properties and good flexibility. An inorganic insulating layer is provided between the shielding part and the first electrode. The inorganic insulating layer has good electrical insulation properties and high thermal stability.

[0054] In another embodiment, the first dielectric layer is an inorganic insulating layer, and the second dielectric layer is an organic insulating layer. In this embodiment, an inorganic insulating layer is provided between the switching circuit and the shielding part. The inorganic insulating layer has good electrical insulation properties and high thermal stability. An organic insulating layer is provided between the shielding part and the first electrode. The organic insulating layer has good electrical insulation properties and good flexibility.

[0055] In the above embodiments, the shielding part and the first electrode are disposed on different layers, and a second dielectric layer is disposed between the shielding part and the first electrode. This not only increases the shielding capacitance and reduces the common capacitance, but also makes the process more feasible. The influence of the transmittance (TR) caused by etching the shielding part and the first electrode is reduced. In addition, the different layers increase the distance between the shielding part and the first electrode, thereby reducing the influence of the shielding part on the pixel electric field.

[0056] Those skilled in the art can choose any suitable inorganic material to form the aforementioned inorganic insulating layer, including but not limited to silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, or aluminum nitride. Those skilled in the art can choose any suitable organic material to form the aforementioned organic insulating layer, which can be a mixed polymer composed of a main structure, a photosensitizer, and a solvent. The main structure can be one of phenolic resin, polyalicyclic acrylates and their copolymers, acrylic resin, or polyimide. The organic material can also be a polyimide main body with added photosensitive groups and a solvent. The organic material can also be other suitable materials, which are not limited in this application.

[0057] Furthermore, such as Figure 4 and Figure 5 As shown, the shielding portion 13 includes a first portion 131 and a second portion 132 connected to the first portion 131. The first portion 131 is located between the second dielectric layer 15 and the first dielectric layer 14 and extends along a direction perpendicular to the thickness of the display panel. The second portion 132 is located in the first dielectric layer 14 and / or the second dielectric layer 15 and extends along a direction parallel to the thickness direction or along a direction intersecting the thickness direction and the extension direction of the first portion 131, respectively. In this embodiment, the shielding portion and the first electrode are located on different film layers. The shielding portion includes the first part and the second part. The first part and the switching circuit form a shielding capacitor located directly above the switching circuit. The second part and the switching circuit form a shielding capacitor located above the side of the switching circuit. The shielding capacitors directly above and above the side can intercept the electric field lines between the first electrode and the switching circuit from multiple angles, so that more electric field lines between the first electrode and the switching circuit terminate at the plates of the shielding capacitor, further reducing the number of electric field lines between the first electrode and the switching circuit. This more effectively weakens the parasitic capacitance effect between the switching circuit and the first electrode, and further improves the shielding effect of the shielding portion.

[0058] in, Figure 4 An exemplary embodiment is shown in which the second portion 132 is located in the first dielectric layer 14 and extends in a direction that intersects the thickness direction and the extension direction of the first portion 131, respectively. Figure 5An exemplary embodiment is shown in which the second portion 132 is located in the second dielectric layer 15 and extends in a direction that intersects the thickness direction and the extension direction of the first portion 131, respectively.

[0059] In some embodiments, such as Figure 6 As shown, the first electrode 12 includes a third portion 121 and a fourth portion 122 connected to the third portion 121. The third portion 121 is located on the side of the shielding portion 13 away from the substrate 10, and the fourth portion 122 is located between the substrate 10 and the third portion 121. In this embodiment, the shielding portion is located between the third portion of the first electrode and the switching circuit, further achieving electromagnetic shielding. The fourth portion of the first electrode is located between the third portion and the substrate and is connected to the third portion. The third and fourth portions achieve layer-swapping bridging of the first electrode, which helps to reduce the resistance of the first electrode. At the same time, the fourth portion facilitates the electrical connection of the first electrodes in different regions after layer swapping, enhancing the connection stability of the first electrode.

[0060] Specifically, the fourth part is connected to the third part through a via-layer bridging method.

[0061] According to some other alternatives of this application, such as Figure 1 , Figure 3 and Figure 7 As shown, at least a portion of the shielding portion 13 is located on the same film layer as the first electrode 12. In this embodiment, by setting at least a portion of the shielding portion and the first electrode on the same layer, they can be manufactured using the same process, which helps to simplify the overall process flow of the display panel.

[0062] Furthermore, such as Figure 7As shown, the shielding portion 13 includes a first portion 131 and a second portion 132 connected to the first portion 131. The first portion 131 and the first electrode 12 are located in the same film layer. The display panel further includes a third dielectric layer 16 located between the substrate 10 and the first electrode 12, and at least located in the display area. The switching circuit 11 is located between the third dielectric layer 16 and the substrate 10. The second portion is located in the third dielectric layer 16 and extends in a direction that intersects the thickness direction of the display panel and the extension direction of the first portion 131, respectively. In this embodiment, the shielding portion and the first electrode are located on the same film layer. The shielding portion includes the first part and the second part. The first part and the switching circuit form a shielding capacitor located directly above the switching circuit. The second part and the switching circuit form a shielding capacitor located above the side of the switching circuit. The shielding capacitors directly above and above the side can intercept the electric field lines between the first electrode and the switching circuit from multiple angles, so that more electric field lines between the first electrode and the switching circuit terminate at the plates of the shielding capacitor, further reducing the number of electric field lines between the first electrode and the switching circuit. This more effectively weakens the parasitic capacitance effect between the switching circuit and the first electrode, and further improves the shielding effect of the shielding portion.

[0063] Specifically, Figure 1 , Figure 3 and Figure 7 These are examples where the shielding portion 13 and the first electrode 12 are located in the same film layer, wherein... Figure 1 In the above-mentioned shielding part 13 and the first electrode 12 are located in the same film layer, and along the thickness direction of the above-mentioned display panel, the distance from the shielding part 13 to the switch circuit 11 is the same as the distance from the first electrode 12 to the switch circuit 11. Figure 3 In this process, the shielding portion and the first electrode 12 are located in the same film layer, and along the thickness direction of the display panel, the distance from the shielding portion 13 to the switching circuit 11 is less than the distance from the first electrode 12 to the switching circuit 11. The height difference between the shielding portion 13 and the first electrode 12 can be etched by a half-tone mask on the planarization layer on the side of the switching circuit 11 away from the substrate 10 to obtain a U-shaped third dielectric layer 16. The shielding portion 13 is disposed in the groove of the U-shaped third dielectric layer 16, and the first electrode 12 is disposed on both sides of the groove. Figure 7In the above-mentioned shielding portion 13, there are a first portion 131 and a second portion 132. The second portion 132 is located on both sides of the first portion 131 and is connected to the first portion 131. The first portion 131 and the first electrode 12 are located in the same film layer and along the thickness direction of the display panel, the distance from the first portion 131 to the switch circuit 11 is the same as the distance from the first electrode 12 to the switch circuit 11. The second portion 132 is located in the third dielectric layer 16. The third dielectric layer 16 and the trench 18 located in the third dielectric layer 16 can be obtained by trenching the planarization layer on the side of the switch circuit 11 away from the substrate 10. Then, the first portion 131 is formed on the surface of the third dielectric layer 16 away from the substrate 10, and the second portion 132 is formed on the sidewall of the trench 18, so that the shielding portion 13 that three-dimensionally partially encloses the switch circuit 11 is obtained.

[0064] According to some other alternatives of this application, such as Figures 2 to 7 As shown, at least a portion of the shielding portion 13 is located between the switching circuit 11 and the first electrode 12 along the thickness direction of the display panel.

[0065] in, Figures 2 to 5 As shown, along the thickness direction of the display panel, the entire shielding portion 13 is located between the switching circuit 11 and the first electrode 12. Figure 6 As shown, the entire shielding portion 13 is located between the switching circuit 11 and the portion of the first electrode 12 (i.e., the third portion 121). Figure 7 As shown, a portion of the shield (i.e., the second portion 132) is located between the switching circuit 11 and the first electrode 12.

[0066] In this embodiment, the display panel further includes a second electrode located on the side of the first electrode away from the substrate, and at least in the display area. The second electrode and the first electrode form an electric field, which controls the rotation angle of the liquid crystal molecules, thereby controlling the transmission and blocking of light by the liquid crystal molecules, and realizing image display on the display panel.

[0067] Specifically, the first electrode is a common electrode, and the second electrode is a pixel electrode. The common electrode is used to provide a reference voltage (e.g., 0V), and the pixel electrode is used to control the display pixels. By controlling the voltage difference between the common electrode and the pixel electrode, the rotation of the liquid crystal molecules can be controlled.

[0068] In practical applications, the aforementioned common electrodes can be laid out on the substrate in a full-surface manner or in a strip (comb-like) shape.

[0069] The switching circuit 11 described in this application includes at least one of the following: a scan line, a data line, and a thin-film transistor. This application provides electromagnetic shielding for the signal coupling between the first electrode and at least one of the scan line, data line, and thin-film transistor by providing a shielding portion on one side of the scan line, data line, and thin-film transistor. This can alleviate or even eliminate crosstalk problems caused by signal coupling, thereby improving the display effect of the display panel to a certain extent.

[0070] Specifically, when the switching circuit 11 includes a scan line or a data line, the switching circuit 11 has a single-layer structure; when the switching circuit 11 includes a thin-film transistor, the switching circuit 11 has a multi-layer structure.

[0071] In addition, such as Figures 1 to 7 As shown, the display panel further includes a fourth dielectric layer 17, which is located between the substrate 10 and the switching circuit 11.

[0072] In some embodiments, the switching circuit 11 includes a data line 111, a thin-film transistor 112, and a scan line 113. The orthographic projection of the shielding portion 13 on the substrate 10 at least partially overlaps with the orthographic projection of the switching circuit 11 on the substrate 10.

[0073] Figure 8 An exemplary top perspective view of the display panel is shown, where the orthographic projection of the shielding portion 13 overlaps with the orthographic projection of the data line 111 and the thin-film transistor 112 in the switching circuit 11. Figure 8 As shown, the orthographic projections of the data line 111 and the thin-film transistor 112 on the substrate are located within the orthographic projection of the shielding portion 13 on the substrate. The first electrode 12 may be disposed on the same layer as the shielding portion 13, or it may not be disposed on the same layer as the shielding portion 13.

[0074] Figure 9 An exemplary top perspective view of the display panel is shown when the orthographic projection of the shielding portion 13 overlaps with the orthographic projection of the data line 111 in the switching circuit 11. Figure 9 As shown, the orthographic projection of the data line 111 on the substrate is located in the orthographic projection of the shielding portion 13 on the substrate.

[0075] Figure 10 An exemplary top perspective view of the display panel is shown when the orthographic projection of the shielding portion 13 overlaps with the orthographic projection of the thin-film transistor 112 in the switching circuit 11. Figure 10 As shown, the orthographic projection of the thin-film transistor 112 on the substrate is located in the orthographic projection of the shielding portion 13 on the substrate.

[0076] Figure 11 An exemplary top perspective view of the display panel is shown when the orthographic projection of the shielding portion 13 overlaps with the orthographic projection of the scan line 113 in the switching circuit 11. Figure 11 As shown, the orthographic projection of the scan line 113 on the substrate is located in the orthographic projection of the shielding portion 13 on the substrate.

[0077] It should be noted that the projection overlap of the shielding part 13 and the switching circuit 11 can be varied, and those skilled in the art can choose flexibly according to the actual situation, as long as the coupling capacitance between the shielding part and the switching circuit is greater than the coupling capacitance between the first electrode and the switching circuit.

[0078] Figure 12 An exemplary top view of a display panel according to an embodiment of this application is shown, such as... Figure 12 As shown, there are multiple shielding portions 13, which are arranged in a mesh pattern in the display area 19. These multiple shielding portions 13 are electrically connected, and their connection points are located in the non-display area 20. The mesh structure formed by the multiple shielding portions ensures good stability, and the location of their connection points in the non-display area ensures a larger effective display area for the display panel.

[0079] In some embodiments, there are multiple first electrodes, which are arranged in a mesh pattern in the display area. The multiple first electrodes are electrically connected, and the connection points are located in the non-display area. The mesh structure formed by the multiple first electrodes ensures good stability of the pixel electric field, and the location of the connection points in the non-display area ensures a larger effective display area for the display panel.

[0080] Specifically, the plurality of the aforementioned first electrodes can be employed as follows: Figure 6 The via-layer bridging method shown achieves a mesh connection. The material of the first electrode at the bridging point can be ITO, or aluminum, copper, molybdenum, and related alloys.

[0081] Other alternatives, such as Figure 12As shown, the display panel further includes: a first signal line 21, located at least in the non-display area 20, with a first end of the first signal line 21 electrically connected to any of the shielding portions 13; a second signal line (not shown), located at least in the non-display area 20, with a first end of the second signal line electrically connected to the first electrode; and a driving circuit 22, at least a portion of which is located in the non-display area 20, with the second ends of the first signal line 21 and the second signal line electrically connected to the driving circuit 22, the driving circuit 22 supplying power to the shielding portion 13 and the first electrode, and the voltage transmitted by the first signal line 21 being the same as or different from the voltage transmitted by the second signal line. In this embodiment, an independent first signal line is used to connect the shielding part and the driving circuit. This independent signal line allows the shielding part and the driving circuit to form a relatively independent electrical connection. This independent connection means that the operating voltage control of the shielding part depends only on the signal transmitted through the signal line between the two, and is not directly affected by the electrical state of other circuit parts. Even if voltage fluctuations or signal changes occur in other parts of the circuit, these changes are not easily transmitted to the shielding part through the signal line because the connection of the shielding part is independent. This ensures the independence of the operating voltage control of the shielding part and achieves the goal of independently controlling the operating voltage of the shielding part. In addition, the independent signal line can be shielded to effectively reduce the interference of external electromagnetic fields on signal transmission. At the same time, since the signal line is independent of other circuits, the electromagnetic field it generates will not easily interfere with other circuits, ensuring the purity of the operating voltage control signal of the shielding part, which is conducive to achieving independent and stable control of the operating voltage of the shielding part.

[0082] Specifically, when the voltage transmitted by the first signal line and the voltage transmitted by the second signal line are different, it can be that the two voltages have different polarities, different values, or both different polarities and values.

[0083] In one specific embodiment, the voltage difference between the first signal line and the second signal line ranges from -1V to 1V. Furthermore, the greater the distance between the shield and the first electrode, the larger the voltage difference can be. Specifically, for every 2μm increase in the distance between the shield and the first electrode, the voltage difference can increase by 1V.

[0084] In some embodiments, the display area includes an opening area and a light-shielding area surrounding the opening area. The shielding portion at least partially overlaps with the light-shielding area, and the first electrode overlaps with at least one of the light-shielding area and the opening area. The fact that the shielding portion is at least partially located within the light-shielding area helps reduce the coupling effect of the light-shielding area, enhances the electromagnetic shielding effect on the light-shielding area, and thus further ensures better display performance.

[0085] Preferably, all of the shielding portions are located within the aforementioned light-shielding area.

[0086] Taking the aforementioned switching circuit, including the aforementioned data lines, as an example, the simulation model diagram of the display panel after the shielding is set is as follows: Figure 13 As shown, the shielding part and the data line form an electric field capacitance Cdcs that is independent of the capacitance Cdc between the common electrode and the data line 111. The capacitance between the shielding part and the common electrode is Cccs, and the capacitance between the pixel electrode and the common electrode is Cpixel. Cdcs > Cdc.

[0087] Under harsh scene conditions (set as data line driven sub-pixel columns, the scene is first row +-+000+-+000…, second row 000-+-000-+-…, and so on), the perturbation of the pixel electric field reference value (i.e., the voltage value of the common electrode) Vcom is simulated, and the simulated waveforms of the Vcom perturbation values ​​of Examples 1, 2, 3 and the comparative example are as follows. Figure 14 As shown. Example 1 is a display panel embodiment with a shielding portion and a distance of 1.5 μm between the shielding portion and the common electrode; Example 2 is a display panel embodiment with a shielding portion and a distance of 2.0 μm between the shielding portion and the common electrode; Example 3 is a display panel embodiment with a shielding portion and the same distance between the shielding portion and the common electrode as in Example 1, but with the shielding portion covering the data line an area 0.50 μm larger than that in Example 1; the comparative example is a display panel embodiment without a shielding portion. Figure 14 The simulation data are shown in Table 1.

[0088] Table 1

[0089] example Example 1 Example 2 Example 3 Comparative Example Vcom disturbance value 3.99 3.76 3.55 6.79

[0090] As shown in Table 1, compared to displays without shielding, those with shielding significantly reduce the disturbance to the reference value Vcom of the pixel electric field under harsh conditions because the disturbance from the data lines is shielded by the shielding, which has an independent signal source. Furthermore, as the coverage area of ​​the shielding relative to the data lines increases (Cdcs increases) and the distance between the shielding and the common electrode increases (Cccs decreases), the disturbance is further reduced, resulting in better optimization of the display image.

[0091] In addition, optical simulations were performed on display panels with and without shielding, and the resulting optical simulation data are shown in Table 2.

[0092] Table 2

[0093]

[0094] In Table 2, under normal screen conditions, the voltage of both the common electrode and the shield is 0V. Under heavy screen conditions, the voltage of the common electrode is 0V, and the voltage of the shield is 0.5V. As shown in Table 2, compared to the display panel without a shield, the display panel with a shield has virtually no difference in screen brightness and contrast under normal screen conditions. Therefore, it is determined that the shield has virtually no impact on the visual effect of the display panel.

[0095] This application also provides a display device. Figure 15 A top view schematic diagram of a display device 200 according to an embodiment of this application is shown as an example. Figure 15 As shown, the above-mentioned display device 200 includes any of the above-mentioned display panels 100.

[0096] The aforementioned display device includes any of the aforementioned display panels. A shielding portion is provided on one side of the switching circuit in the display panel, such that the shielding portion and the switching circuit overlap in the thickness direction of the display panel. When an electrical signal is applied to the shielding portion and the switching circuit, an electric field is formed between them. The electric field attracts charges, causing positive charges to accumulate on one of the shielding portion and the switching circuit, and negative charges to accumulate on the other. This forms a shielding capacitor between the shielding portion and the switching circuit. The shielding capacitor can isolate the switching circuit from the first electrode, so that at least a portion of the electric field lines that originally formed parasitic capacitance between the first electrode and the switching circuit preferentially terminate at the plate of the shielding capacitor. This achieves the effect of reducing the electric field lines between the first electrode and the switching circuit, thereby reducing the adverse effects of parasitic capacitance between the first electrode and the switching circuit. Furthermore, it reduces or even eliminates the coupling effect between the first electrode and the switching circuit caused by parasitic capacitance, alleviates the crosstalk problem caused by the first electrode's inability to recover normal voltage in time after being coupled by the switching circuit, and ensures a better display effect of the display device.

[0097] like Figure 12 As shown, the aforementioned display device also includes an external driving source 23, which is electrically connected to the display panel. The external driving source 23 can be an IC / FPC / COF / PCB. It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0098] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0099] 1) The display panel of this application has a shielding part on one side of the switching circuit, so that the shielding part and the switching circuit overlap in the thickness direction of the display panel. When an electrical signal is applied to the shielding part and the switching circuit, an electric field is formed between them. The electric field attracts charges, so that positive charges accumulate on one of the shielding part and the switching circuit, and negative charges accumulate on the other of the shielding part and the switching circuit, thereby forming a shielding capacitor between the shielding part and the switching circuit. This shielding capacitor can isolate the switching circuit from the first electrode, so that at least part of the electric field lines that originally formed parasitic capacitance between the first electrode and the switching circuit preferentially terminate at the plate of the shielding capacitor, thereby reducing the electric field lines between the first electrode and the switching circuit, thereby reducing the adverse effects of parasitic capacitance between the first electrode and the switching circuit, and further reducing or even eliminating the coupling effect between the first electrode and the switching circuit caused by parasitic capacitance, alleviating the crosstalk problem caused by the first electrode not being able to recover normal voltage in time after being coupled by the switching circuit, and ensuring that the display panel has a better display effect.

[0100] 2) The display device of this application includes any of the above-mentioned display panels. A shielding part is provided on one side of the switching circuit in the display panel, such that the shielding part and the switching circuit overlap in the thickness direction of the display panel. When an electrical signal is applied to the shielding part and the switching circuit, an electric field is formed between them. The electric field attracts charges, causing positive charges to accumulate on one of the shielding part and the switching circuit, and negative charges to accumulate on the other of the shielding part and the switching circuit. This forms a shielding capacitor between the shielding part and the switching circuit. The shielding capacitor can isolate the switching circuit from the first electrode, so that at least part of the electric field lines that originally formed the parasitic capacitance between the first electrode and the switching circuit preferentially terminate at the plate of the shielding capacitor. This achieves the effect of reducing the electric field lines between the first electrode and the switching circuit, thereby reducing the adverse effects of the parasitic capacitance between the first electrode and the switching circuit. This further reduces or even eliminates the coupling effect between the first electrode and the switching circuit caused by the parasitic capacitance, alleviates the crosstalk problem caused by the first electrode not being able to recover normal voltage in time after being coupled by the switching circuit, and ensures that the display effect of the display device is better.

[0101] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized in that, The display panel includes a display area and a non-display area located on at least one side of the display area. A substrate is located in the display area and the non-display area; A switching circuit is located on one side of the substrate, and at least in the display area; The first electrode is located on the side of the switching circuit away from the substrate, and is at least located in the display area; A shielding portion is located on the side of the switching circuit away from the substrate and at least in the display area. The orthographic projection of the shielding portion on the substrate at least partially overlaps with the orthographic projection of the switching circuit on the substrate. The signal line connected to the shielding portion is different from the signal line connected to the first electrode. The shielding portion is located between the switching circuit and the first electrode. The display panel further includes: a first dielectric layer located between the switching circuit and the shielding portion, and at least located in the display area; a second dielectric layer located between the shielding portion and the first electrode, and at least located in the display area; the shielding portion includes a first portion and a second portion connected to the first portion, the first portion being located between the second dielectric layer and the first dielectric layer and extending along a direction perpendicular to the thickness direction of the display panel, the second portion being located in the first dielectric layer and / or the second dielectric layer, and extending along a direction parallel to the thickness direction or along a direction intersecting the thickness direction and the extension direction of the first portion, respectively. Alternatively, at least a portion of the shielding portion may be located in the same film layer as the first electrode.

2. The display panel according to claim 1, characterized in that, The first dielectric layer and the second dielectric layer satisfy one of the following: The first dielectric layer and the second dielectric layer are made of the same material; The first dielectric layer is an organic insulating layer, and the second dielectric layer is an inorganic insulating layer; The first dielectric layer is an inorganic insulating layer, and the second dielectric layer is an organic insulating layer.

3. The display panel according to claim 1, characterized in that, The first electrode includes a third part and a fourth part connected to the third part. The third part is located on the side of the shielding portion away from the substrate, and the fourth part is located between the substrate and the third part.

4. The display panel according to claim 1, characterized in that, The shielding portion includes a first part and a second part connected to the first part, wherein the first part is located on the same film layer as the first electrode, and the display panel further includes: The third dielectric layer is located between the substrate and the first electrode, and at least in the display area. The switching circuit is located between the third dielectric layer and the substrate. The second portion is located in the third dielectric layer and extends in a direction that intersects the thickness direction of the display panel and the extension direction of the first portion, respectively.

5. The display panel according to any one of claims 1 to 4, characterized in that, The display panel also includes: The second electrode is located on the side of the first electrode away from the substrate, and is at least located in the display area.

6. The display panel according to claim 5, characterized in that, The first electrode is a common electrode, and the second electrode is a pixel electrode.

7. The display panel according to any one of claims 1 to 4, characterized in that, The switching circuit includes at least one of the following: Scan lines, data lines, thin-film transistors.

8. The display panel according to any one of claims 1 to 4, characterized in that, There are multiple shielding parts, which are arranged in a mesh pattern in the display area. The multiple shielding parts are electrically connected, and the connection points of the multiple shielding parts are located in the non-display area.

9. The display panel according to claim 8, characterized in that, The display panel also includes: A first signal line is located at least in the non-display area, and a first end of the first signal line is electrically connected to any of the shielding portions. A second signal line is located at least in the non-display area, and a first end of the second signal line is electrically connected to the first electrode. A driving circuit, at least a portion of which is located in the non-display area, wherein the second end of the first signal line and the second end of the second signal line are electrically connected to the driving circuit, the driving circuit being used to supply power to the shielding portion and the first electrode, and the voltage transmitted by the first signal line being the same as or different from the voltage transmitted by the second signal line.

10. The display panel according to any one of claims 1 to 4, characterized in that, There are multiple first electrodes, which are arranged in a mesh pattern in the display area. The multiple first electrodes are electrically connected, and the connection points of the multiple first electrodes are located in the non-display area.

11. The display panel according to any one of claims 1 to 4, characterized in that, The display area includes an opening area and a light-shielding area surrounding the opening area. The shielding portion at least partially overlaps with the light-shielding area, and the first electrode overlaps with at least one of the light-shielding area and the opening area.

12. The display panel according to any one of claims 1 to 4, characterized in that, The orthographic projection of the first electrode on the substrate may or may not overlap with the orthographic projection of the switching circuit on the substrate. The overlapping area of ​​the orthographic projection of the first electrode on the substrate and the orthographic projection of the switching circuit on the substrate is a first area, and the overlapping area of ​​the orthographic projection of the shielding portion on the substrate and the orthographic projection of the switching circuit on the substrate is a second area, satisfying at least a portion of the following: The first area is smaller than the second area; The distance between the first electrode and the switching circuit in the thickness direction of the display panel is greater than the distance between the shielding part and the switching circuit in the thickness direction of the display panel.

13. A display device, characterized in that, include: The display panel according to any one of claims 1 to 12.

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