Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a display area and a non-display area located on at least one side of the display area, and the display panel comprises a substrate located in the display area and the non-display area; the switching circuit is located on one side of the substrate and at least located in the display area; the first electrode is located on the side, away from the substrate, of the switching circuit and at least located in the display area; the shielding part is located on the side, away from the substrate, of the switching circuit and at least located in the display area, the orthographic projection of the shielding part on the substrate and the orthographic projection of the switching circuit on the substrate are at least partially overlapped, and a signal line connected with the shielding part is different from a signal line connected with the first electrode. The problem that the display effect of the display panel is poor due to coupling crosstalk in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the continuous development of science and technology, display technology is also constantly improving, and consumers' requirements for display products are becoming higher and higher. Especially in ultra-high frequency display, consumers have more stringent requirements for picture quality and stability. In the high-frequency picture driving scenario, the coupling problem between signals has become a challenge that cannot be ignored, which will cause crosstalk in the display screen, thus affecting the user's viewing experience. Coupling refers to the mutual influence between different signals, which causes interference or distortion during signal transmission. In display technology, the coupling between signals can cause problems such as noise, color distortion, and even blurred images on the display screen. When the display frequency is higher, the coupling problem between signals will become more serious, because high-frequency signals are transmitted faster, the signal waveform is more complex, and they are easily affected by external interference. Summary of the invention

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

[0004] In order to achieve the above object, according to one aspect of the present application, a display panel is provided, comprising a display area and a non-display area located at least on one side of the display area, the display panel comprising:

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

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

[0007] A first electrode, located at a side of the switch circuit away from the substrate and at least located in the display area;

[0008] The shielding portion is located on a 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 the present application, based on the same inventive concept, a display device is also provided, comprising: any one of the display panels described above.

[0010] By applying the technical solution of the present 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 electric signal is applied to the shielding part and the switching circuit, an electric field is formed between the two. The electric field attracts charges, so that positive charges gather on one of the shielding part and the switching circuit, and negative charges gather on the other of the shielding part and the switching circuit, thereby forming 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 form the parasitic capacitance between the first electrode and the switching circuit preferentially terminate at the plate of the shielding capacitor, thereby achieving 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, and further reducing or even eliminating the coupling effect between the first electrode and the switching circuit caused by the parasitic capacitance, alleviating the crosstalk problem caused by the inability of the first electrode to restore the normal voltage in time after being coupled by the switching circuit, and ensuring a good display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0012] Figure 1 A schematic cross-sectional structure diagram of a display panel provided in an embodiment of the present application is shown;

[0013] Figure 2 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application is shown;

[0014] Figure 3 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application is shown;

[0015] Figure 4 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application is shown;

[0016] Figure 5 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application is shown;

[0017] Figure 6 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application is shown;

[0018] Figure 7 A schematic cross-sectional structure diagram of another display panel provided in an embodiment of the present application is shown;

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

[0020] Fig. 9 A top perspective view of another display panel provided in an embodiment of the present application is shown;

[0021] Fig.10 A top perspective view of another display panel provided in an embodiment of the present application is shown;

[0022] Fig.11 A top perspective view of another display panel provided in an embodiment of the present application is shown;

[0023] Fig.12 A schematic top view of a display panel provided in an embodiment of the present application is shown;

[0024] Fig.13 A schematic diagram of a simulation model of a display panel provided in an embodiment of the present application is shown;

[0025] Fig.14 shows a Vcom disturbance value simulation waveform diagram according to the embodiments and comparative examples provided in the embodiments of the present application;

[0026] Fig.15 A schematic structural diagram of a display device provided in an embodiment of the present application is shown.

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

[0028] 10. substrate; 11. switching circuit; 111. data line; 112. thin film transistor; 113. scanning 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. groove; 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 DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work 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 and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] The inventors found that there is a parasitic capacitance between the common electrode and the data signal in the display panel, which causes a signal coupling effect between the two. In high-frequency screen driving scenarios, the common electrode cannot restore the normal voltage in time after being coupled by the data signal, resulting in abnormal pixel electric field, crosstalk in the display, and poor display effect.

[0033] In order to solve the above technical problems, embodiments of the present application provide a display panel and a display device.

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

[0035] In this embodiment, a display panel is provided. Figure 1 The cross-sectional structure diagram of the display panel according to the embodiment of the present application is exemplarily shown. The display panel includes a display area and a non-display area located at least on one side of the display area. Figure 1 As shown, the display panel comprises:

[0036] The substrate 10 is located in the display area and the non-display area;

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

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

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

[0040] In a specific application, the first electrode 12 may be located only in the display area; the first electrode 12 may also be located in 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 a side of the switching circuit 11 away from the substrate 10 and at least 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 different from the signal source of the first electrode 12.

[0042] In a specific application, the shielding portion 13 may be located only in the display area; the shielding portion 13 may also be located in the display area and the non-display area. The shielding portion 13 and the first electrode 12 are located on the same side of the switch circuit 11 .

[0043] Through the above embodiment, 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, and when an electric signal is applied to the shielding part and the switching circuit, an electric field is formed between the two, and the electric field attracts charges, so that positive charges gather on one of the shielding part and the switching circuit, and negative charges gather on the other of the shielding part and the switching circuit, thereby forming a shielding capacitor between the shielding part and the switching circuit, and the shielding capacitor can isolate the switching circuit from the first electrode, so that at least part of the electric field lines that originally form the parasitic capacitance between the first electrode and the switching circuit preferentially terminate at the plate of the shielding capacitor, achieving 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, and further reducing or even eliminating the coupling effect between the first electrode and the switching circuit caused by the parasitic capacitance, alleviating the crosstalk problem caused by the inability of the first electrode to restore the normal voltage in time after being coupled by the switching circuit, and ensuring a good display effect of the display panel.

[0044] It should be noted that Figure 1The embodiment in which the shielding portion 13 and the first electrode 12 are located in the same film layer is only exemplarily shown, and the relative position relationship between the shielding portion 13 and the first electrode 12 is not limited to Figure 1 For example, those skilled in the art can flexibly set the relative position relationship between the two; and, Figure 1 The example only shows that the orthographic projection of the switch circuit 11 on the substrate 10 is located in 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 does not overlap with the orthographic projection of the switch circuit 11 on the substrate 10. The relative position relationship of the orthographic projections of the three on the substrate is not limited to Figure 1 Based on the example, those skilled in the art can flexibly set the relative position relationship of the three orthographic projections.

[0045] Specifically, the orthographic projection of the first electrode 12 on the substrate 10 partially overlaps or does not overlap with the orthographic projection of the switching 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 switching 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 switching circuit 11 on the substrate 10 is a second area, satisfying at least part of the following: the first area is smaller than the second area; the distance between the first electrode 12 and the switching circuit 11 in the thickness direction of the display panel is greater than the distance between the shielding portion 13 and the switching circuit 11 in the thickness direction of the display panel. The present application ensures that 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 by limiting the overlapping area of ​​the orthographic projection of the shielding portion and the switching circuit to be greater than the overlapping area of ​​the orthographic projection of the first electrode and the switching circuit, and / or limiting the distance between the shielding portion and the switching circuit to be less than the distance between the first electrode and the switching circuit. Since the coupling capacitance between the shielding portion and the switching circuit is larger, the electric field lines tend to be distributed between the shielding portion and the switching circuit, so that the distribution of the electric field lines between the first electrode and the switching circuit is relatively reduced, so that the coupling effect established between the first electrode and the switching circuit through the electric field lines is weakened, so that the shielding portion can effectively shield the coupling effect between the first electrode and the switching circuit.

[0046] In an 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 larger 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 smaller 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 the present application, Figure 2 and Figure 3 As shown, the shielding part 13 is located between the switch circuit 11 and the first electrode 12. That is to say, the distance between the shielding part and the switch circuit is greater than the distance between the first electrode and the switch circuit, so that the shielding capacitance between the shielding part and the switch circuit is greater than the electrode capacitance between the first electrode and the switch circuit. The large capacitance means that the electric field between the shielding part and the switch circuit is easier to establish. The electric field between the shielding part and the switch circuit will repel and squeeze the electric field between the first electrode and the switch circuit, weakening the electric field strength between the first electrode and the switch circuit, thereby further ensuring that the electromagnetic shielding effect of the shielding part is better. In addition, arranging the shielding part between the switch circuit and the first electrode can make the distance between the shielding part and the first electrode larger, so that the shielding part has less influence on the pixel electric field formed by the first electrode.

[0049] In some exemplary embodiments, Figure 2As shown, the display panel further includes: a first dielectric layer 14, located between the switch circuit 11 and the shielding portion 13, and at least located in the display area; a second dielectric layer 15, located between the shielding portion 13 and the first electrode 12, and at least located in the display area. The first dielectric layer and the second dielectric layer both play an isolation and protection role, and the second dielectric layer is provided between the shielding portion and the first electrode, which can further make the distance between the shielding portion and the switch circuit greater than the distance between the first electrode and the switch circuit, further improve the shielding capacitance and reduce the electrode capacitance, thereby further reducing the coupling effect between the first electrode and the switch circuit, and further reducing the display crosstalk problem 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 to simplify the manufacturing process, and the physical and chemical properties of the two dielectric layers are consistent, which helps to improve the uniformity and reliability of the entire display panel.

[0051] When the materials of the first dielectric layer and the second dielectric layer are the same, the two can be regarded as one dielectric layer, that is, the shielding part and the first electrode are arranged in the same layer, and the distance from the shielding part to the switching circuit is smaller 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, the first dielectric layer and the second dielectric layer may both be inorganic insulating layers, or may both be organic insulating layers.

[0053] In another embodiment, the material of 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 switch circuit and the shielding portion, and the organic insulating layer has good electrical insulation performance and good flexibility; an inorganic insulating layer is provided between the shielding portion and the first electrode, and the inorganic insulating layer has good electrical insulation performance 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 switch circuit and the shielding portion, and the inorganic insulating layer has good electrical insulation performance and high thermal stability; an organic insulating layer is provided between the shielding portion and the first electrode, and the organic insulating layer has good electrical insulation performance and good flexibility.

[0055] In the above embodiment, the present application arranges the shielding part and the first electrode in different layers, and arranges a second dielectric layer between the shielding part and the first electrode, which can not only increase the shielding capacitance and reduce the common capacitance, but also make such an arrangement more process feasible, and the influence of the transmittance (TR) caused by etching the shielding part and the first electrode is reduced. In addition, the different layer arrangements 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 select any suitable inorganic material to form the above 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 select any suitable organic material to form the above organic insulating layer, which can be a mixed polymer consisting of a main structure + a photosensitive agent and a solvent. The main structure can be one of phenolic resin, alicyclic acrylate and its copolymer, acrylic resin, and polyimide; the organic material can also be a polyimide main body with a photosensitive group added and a solvent added; the organic material can also be other suitable materials, which are not limited in this application.

[0057] Furthermore, if 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 in a thickness direction perpendicular to the display panel, and the second portion 132 is located in the first dielectric layer 14 and / or the second dielectric layer 15 and extends in a direction parallel to the thickness direction or in a direction intersecting the thickness direction and the extension direction of the first portion 131. In this embodiment, the shielding portion and the first electrode are located in different film layers, and 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, and 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, thereby more effectively weakening the influence of the parasitic capacitance between the switching circuit and the first electrode, and further improving the shielding effect of the shielding portion.

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

[0059] In some embodiments, 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 switch circuit, further achieving an electromagnetic shielding effect, the fourth portion of the first electrode is located between the third portion and the substrate and connected to the third portion, and the layer-changing bridge of the first electrode is achieved through the third portion and the fourth portion, which is beneficial to reducing the resistance of the first electrode, and at the same time, the first electrodes in different regions are conveniently electrically connected together through the fourth portion after the layer-changing, thereby enhancing the connection stability of the first electrode.

[0060] Specifically, the fourth part is connected to the third part by via-hole layer-changing bridging.

[0061] According to some other optional schemes of this application, such as Figure 1 , Figure 3 and Figure 7 As shown, at least part of the shielding portion 13 is located in the same film layer as the first electrode 12. In this embodiment, at least part of the shielding portion is disposed in the same layer as the first electrode so that the two can be manufactured in the same process, which is conducive to simplifying the overall process flow of the display panel.

[0062] Furthermore, if 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 switch 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 intersecting with the thickness direction of the display panel and the extension direction of the first portion 131. In this embodiment, the shielding portion and the first electrode are located in the same film layer, and 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, and 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, thereby more effectively weakening the influence of the parasitic capacitance between the switching circuit and the first electrode, and further improving the shielding effect of the shielding portion.

[0063] Specifically, Figure 1 , Figure 3 and Figure 7 All of them are examples where the shielding portion 13 and the first electrode 12 are located in the same film layer, wherein: Figure 1 In the embodiment, the shielding portion 13 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 switch circuit 11 is the same as the distance from the first electrode 12 to the switch circuit 11. Figure 3 In the embodiment, 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 switch circuit 11 is smaller than the distance from the first electrode 12 to the switch circuit 11. The height difference between the shielding portion 13 and the first electrode 12 can be etched through a half-tone mask (Half Tone Mask) on the flattening layer on the side of the switch circuit 11 away from the substrate 10 to obtain a concave third dielectric layer 16. The shielding portion 13 is arranged in the groove of the concave third dielectric layer 16, and the first electrode 12 is arranged on both sides of the groove. Figure 7In the embodiment, the shielding portion 13 includes 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, and the third dielectric layer 16 and the groove 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, and then the first portion 131 is formed on the surface of the portion of the third dielectric layer 16 away from the substrate 10, and the second portion 132 is formed on the sidewall of the groove 18, so as to obtain the shielding portion 13 that three-dimensionally half-wraps the switch circuit 11.

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

[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 switch circuit 11 and the first electrode 12. Figure 6 As shown, the entire shielding portion 13 is located between the switch circuit 11 and a portion of the first electrode 12 (ie, the third portion 121). Figure 7 As shown, part of the shielding portion (ie, the second portion 132 ) is located between the switch circuit 11 and the first electrode 12 .

[0066] In the embodiment of the present application, the display panel further comprises: a second electrode, which is located on a side of the first electrode away from the substrate and at least located in the display area. The second electrode forms an electric field with the first electrode, and the rotation angle of the liquid crystal molecules is controlled by the electric field, thereby controlling the transmission and shielding of light by the liquid crystal molecules, thereby 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 (eg, 0V), and the pixel electrode is an electrode for controlling 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 actual application, the common electrode can be laid on the substrate in the form of a whole surface, or in the form of strips (comb teeth).

[0069] The switch circuit 11 of the present application includes at least one of the following: a scan line, a data line, and a thin film transistor. The present application provides a shielding portion on one side of at least one of the scan line, the data line, and the thin film transistor to electromagnetically shield the signal coupling between the first electrode and at least one of the scan line, the data line, and the thin film transistor, thereby alleviating or even eliminating the crosstalk problem caused by the signal coupling, and improving the display effect of the display panel to a certain extent.

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

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

[0072] In some embodiments, the switch 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 switch circuit 11 on the substrate 10.

[0073] Figure 8 The top perspective view of the display panel is exemplarily shown when 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 switch 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 in 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 may not be disposed on the same layer as the shielding portion 13.

[0074] Fig. 9 The top perspective view of the display panel is exemplarily shown when the orthographic projection of the shielding portion 13 overlaps with the orthographic projection of the data line 111 in the switch circuit 11. Fig. 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] Fig.10 The top perspective view of the display panel is exemplarily shown when the orthographic projection of the shielding portion 13 overlaps with the orthographic projection of the thin film transistor 112 in the switch circuit 11. Fig.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] Fig.11 The top perspective view of the display panel is exemplarily shown when the orthographic projection of the shielding portion 13 overlaps with the orthographic projection of the scanning line 113 in the switching circuit 11. Fig.11 As shown, the orthographic projection of the scanning 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 there are many types of projection overlap situations and projection overlap positions between the shielding part 13 and the switching circuit 11, and technicians in this field can flexibly choose according to actual conditions, 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] Fig.12 The top view of the display panel according to the embodiment of the present application is shown as an example. Fig.12 As shown, there are a plurality of shielding parts 13, and the plurality of shielding parts 13 are arranged in a mesh in the display area 19, and the plurality of shielding parts 13 are electrically connected, and the connection position of the plurality of shielding parts 13 is located in the non-display area 20. The plurality of shielding parts are connected to form a mesh structure, which can ensure that the shielding parts have good stability, and the connection position of the plurality of shielding parts is located in the non-display area, which can ensure that the effective display area of ​​the display panel is large.

[0079] In some embodiments, there are a plurality of the first electrodes, and the plurality of the first electrodes are arranged in a mesh in the display area, and the plurality of the first electrodes are electrically connected, and the connection positions of the plurality of the first electrodes are located in the non-display area. The plurality of the first electrodes are connected to form a mesh structure, which can ensure that the pixel electric field formed by the first electrodes has good stability, and the connection positions of the plurality of the first electrodes are located in the non-display area, which can ensure that the effective display area of ​​the display panel is large.

[0080] Specifically, the plurality of first electrodes may be used as follows: Figure 6 The via layer-changing bridge method shown in the figure realizes mesh connection. The material of the first electrode at the bridge can be ITO material, or aluminum, copper, molybdenum and related alloy materials.

[0081] Other options include Fig.12As shown, the display panel further includes: a first signal line 21, at least located in the non-display area 20, and a first end of the first signal line 21 is electrically connected to any of the shielding parts 13; a second signal line (not shown in the figure), at least located in the non-display area 20, and a first end of the second signal line is electrically connected to the first electrode; a driving circuit 22, at least a portion of the driving circuit 22 is located in the non-display area 20, a second end of the first signal line 21 and a second end of the second signal line are electrically connected to the driving circuit 22 respectively, and the driving circuit 22 is used to supply power to the shielding part 13 and the first electrode, and a voltage transmitted by the first signal line 21 is the same as or different from a voltage transmitted by the second signal line. In this embodiment, an independent first signal line is provided to connect the shielding part and the driving circuit. The independent signal line enables the shielding part and the driving circuit to form a relatively independent connection electrically. This independent connection means that the operating voltage control of the shielding part depends only on the signal transmitted through the signal lines of 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, since the connection of the shielding part is independent, these changes are not easily transmitted to the shielding part through the signal line, thereby ensuring the independence of the shielding part's operating voltage control and achieving the purpose of independently controlling the shielding part's operating voltage. In addition, shielding measures can be adopted for the independent signal line to effectively reduce the interference of the external electromagnetic field on the signal transmission. At the same time, since the signal line is independent of other circuits, the electromagnetic field generated by itself will not easily interfere with other circuits, ensuring the purity of the shielding part's operating voltage control signal, which is conducive to achieving independent and stable control of the shielding part's operating voltage.

[0082] Specifically, when the voltage transmitted by the first signal line is different from the voltage transmitted by the second signal line, the two voltages may have different polarities, different values, or both polarities and values.

[0083] In a specific embodiment, the difference between the voltage transmitted by the first signal line and the voltage transmitted by the second signal line ranges from -1V to 1V. Furthermore, the greater the distance between the shielding portion and the first electrode, the greater the difference between the voltages of the two can be set. Specifically, the difference between the voltages of the two can increase by 1V for every 2μm increase in the distance between the shielding portion and the first electrode.

[0084] In some embodiments, the display area includes an opening area and a light shielding area surrounding the opening area, the shielding portion overlaps at least partially with the light shielding area, and the first electrode overlaps at least one of the light shielding area and the opening area. The shielding portion is at least partially located in the light shielding area, which is beneficial to reducing the coupling effect of the light shielding area and enhancing the electromagnetic shielding effect of the light shielding area, thereby further ensuring a better display effect.

[0085] Preferably, all of the shielding parts are located in the light-shielding area.

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

[0087] Under the harsh screen (set as data line driving sub-pixel column, the screen is the first row +-+000+-+000..., the second row 000-+-000-+-..., and so on), the disturbance of the reference value of the pixel electric field (i.e., the voltage value of the common electrode) Vcom is simulated, and the simulated waveforms of the Vcom disturbance values ​​of Example 1, Example 2, Example 3 and the comparative example are obtained as follows: Fig.14 As shown. Among them, Example 1 is a display panel embodiment in which a shielding part is provided, and the spacing between the shielding part and the common electrode is 1.5 μm; Example 2 is a display panel embodiment in which a shielding part is provided, and the spacing between the shielding part and the common electrode is 2.0 μm; Example 3 is a display panel embodiment in which a shielding part is provided, and the spacing between the shielding part and the common electrode is the same as that in Example 1, and the coverage area of ​​the shielding part on the data line is increased by 0.50 μm on the basis of Example 1; The comparative example is a display panel embodiment in which no shielding part is provided. Fig.14 The simulation data is 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 can be seen from Table 1, compared with a display panel without a shielding part, under a harsh screen, the disturbance of the reference value Vcom of the pixel electric field is greatly reduced because the disturbance of the data line will be shielded by the shielding part with an independent signal source. In addition, as the coverage area of ​​the shielding part relative to the data line increases (Cdcs increases), the distance between the shielding part and the common electrode increases (Cccs decreases), the disturbance is further reduced, and the optimization effect of the display screen is better.

[0091] In addition, optical simulation is performed on the display panel provided with the shielding portion and the display panel not provided with the shielding portion, and the obtained optical simulation data is shown in Table 2.

[0092] Table 2

[0093]

[0094] In Table 2, under normal screen, the voltages of the common electrode and the shielding part are set to 0V, and under heavy load screen, the voltage of the common electrode is set to 0V, and the voltage of the shielding part is set to 0.5V. As can be seen from Table 2, compared with the display panel without the shielding part, the screen brightness of the display panel with the shielding part is basically the same, and the contrast of the normal screen is basically the same, so it is determined that the shielding part has basically no effect on the visual effect of the display panel.

[0095] The embodiment of the present application also provides a display device. Fig.15 Schematically shows a top view of a display device 200 according to an embodiment of the present application. Fig.15 As shown, the display device 200 includes: any one of the display panels 100 described above.

[0096] The above-mentioned display device includes any one of the above-mentioned display panels, in which 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, and when an electric signal is applied to the shielding part and the switching circuit, an electric field is formed between the two, and the electric field attracts charges, so that positive charges gather on one of the shielding part and the switching circuit, and negative charges gather on the other of the shielding part and the switching circuit, thereby forming a shielding capacitor between the shielding part and the switching circuit, and the shielding capacitor can isolate the switching circuit from the first electrode, so that at least part of the electric field lines that originally form the parasitic capacitance between the first electrode and the switching circuit preferentially terminate at the plate of the shielding capacitor, thereby achieving 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, and further reducing or even eliminating the coupling effect between the first electrode and the switching circuit caused by the parasitic capacitance, alleviating the crosstalk problem caused by the inability of the first electrode to restore the normal voltage in time after being coupled by the switching circuit, and ensuring a good display effect of the display device.

[0097] like Fig.12 As shown, the display device further includes an external driving source 23, which is electrically connected to the display panel, and the external driving source 23 may be IC / FPC / COF / PCB. It should also be noted that the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, commodity or device including the elements.

[0098] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0099] 1) In the display panel of the present application, a shielding part is provided 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 electric signal is applied to the shielding part and the switching circuit, an electric field is formed between the two. The electric field attracts charges, so that positive charges gather on one of the shielding part and the switching circuit, and negative charges gather on the other of the shielding part and the switching circuit, thereby forming 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 form the parasitic capacitance between the first electrode and the switching circuit preferentially terminate at the plate of the shielding capacitor, thereby achieving 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, and further reducing or even eliminating the coupling effect between the first electrode and the switching circuit caused by the parasitic capacitance, alleviating the crosstalk problem caused by the inability of the first electrode to restore the normal voltage in time after being coupled by the switching circuit, and ensuring a good display effect of the display panel.

[0100] 2) The display device of the present application includes any one of the above-mentioned display panels, in which a shielding portion is provided on one side of the switching circuit in the display panel, so that the shielding portion and the switching circuit overlap in the thickness direction of the display panel, and when an electric signal is applied to the shielding portion and the switching circuit, an electric field is formed between the two, and the electric field attracts charges, so that positive charges are accumulated on one of the shielding portion and the switching circuit, and negative charges are accumulated on the other of the shielding portion and the switching circuit, thereby forming a shielding capacitor between the shielding portion and the switching circuit, and the shielding capacitor can isolate the switching circuit from the first electrode, so that at least part of the electric field lines that originally form the parasitic capacitance between the first electrode and the switching circuit preferentially terminate at the plate of the shielding capacitor, thereby achieving 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, and further reducing or even eliminating the coupling effect between the first electrode and the switching circuit caused by the parasitic capacitance, alleviating the crosstalk problem caused by the inability of the first electrode to restore the normal voltage in time after being coupled by the switching circuit, and ensuring a good display effect of the display device.

[0101] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises a display area and a non-display area located at least on one side of the display area, and the display panel comprises: A substrate, located in the display area and the non-display area; A switch circuit is located on one side of the substrate and at least in the display area; A first electrode, located at a side of the switch circuit away from the substrate and at least located in the display area; The shielding portion is located on a 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.

2. The display panel according to claim 1, characterized in that: The shielding portion is located between the switch circuit and the first electrode.

3. The display panel according to claim 2, characterized in that: The display panel further includes: A first dielectric layer, located between the switch circuit and the shielding portion, and at least located in the display area; The second dielectric layer is located between the shielding portion and the first electrode and at least in the display area.

4. The display panel according to claim 3, characterized in that: The first dielectric layer and the second dielectric layer satisfy one of the following conditions: The first dielectric layer and the second dielectric layer are made of the same material; The material of the first dielectric layer is an organic insulating layer, and the material of 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.

5. The display panel according to claim 3, characterized in that: The shielding portion includes a first part and a second part connected to the first part, the first part is located between the second dielectric layer and the first dielectric layer and extends in a thickness direction perpendicular to the display panel, the second part is located in the first dielectric layer and / or the second dielectric layer, and extends in a direction parallel to the thickness direction or in a direction intersecting the thickness direction and the extension direction of the first part respectively.

6. The display panel according to claim 2, characterized in that: The first electrode includes a third portion and a fourth portion connected to the third portion, the third portion is located at a side of the shielding portion away from the substrate, and the fourth portion is located between the substrate and the third portion.

7. The display panel according to claim 1, characterized in that: At least a portion of the shielding portion is located in the same film layer as the first electrode.

8. The display panel according to claim 7, characterized in that: The shielding portion includes a first portion and a second portion connected to the first portion, the first portion and the first electrode are located in the same film layer, and the display panel further includes: A third dielectric layer is located between the substrate and the first electrode and at least in the display area. The switch 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 with a thickness direction of the display panel and an extension direction of the first portion.

9. The display panel according to claim 1, characterized in that: At least a portion of the shielding portion is located between the switch circuit and the first electrode in a thickness direction of the display panel.

10. The display panel according to any one of claims 1 to 9, characterized in that: The display panel further includes: The second electrode is located at a side of the first electrode away from the substrate and at least located in the display area.

11. The display panel according to claim 10, characterized in that: The first electrode is a common electrode, and the second electrode is a pixel electrode.

12. The display panel according to any one of claims 1 to 9, characterized in that: The switch circuit includes at least one of the following: Scan lines, data lines, thin film transistors.

13. The display panel according to any one of claims 1 to 9, characterized in that: There are a plurality of shielding parts, and the plurality of shielding parts are arranged in a mesh in the display area. The plurality of shielding parts are electrically connected, and the connection positions of the plurality of shielding parts are located in the non-display area.

14. The display panel according to claim 13, characterized in that: The display panel further includes: A first signal line, at least located in the non-display area, wherein a first end of the first signal line is electrically connected to any one of the shielding parts; a second signal line, at least located in the non-display area, wherein a first end of the second signal line is electrically connected to the first electrode; A driving circuit, wherein at least a portion of the driving circuit is located in the non-display area, the second end of the first signal line and the second end of the second signal line are electrically connected to the driving circuit respectively, the driving circuit is used to supply power to the shielding portion and the first electrode, and the voltage transmitted by the first signal line is the same as or different from the voltage transmitted by the second signal line.

15. The display panel according to any one of claims 1 to 9, characterized in that: There are a plurality of the first electrodes, the plurality of the first electrodes are arranged in a mesh in the display area, the plurality of the first electrodes are electrically connected, and the connection positions of the plurality of the first electrodes are located in the non-display area.

16. The display panel according to any one of claims 1 to 9, 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.

17. The display panel according to any one of claims 1 to 9, characterized in that: The orthographic projection of the first electrode on the substrate partially overlaps or does not overlap with the orthographic projection of the switch circuit on the substrate, the overlapping area of ​​the orthographic projection of the first electrode on the substrate and the orthographic projection of the switch 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 switch circuit on the substrate is a second area, and at least part of the following is satisfied: The first area is smaller than the second area; A distance between the first electrode and the switch circuit in a thickness direction of the display panel is greater than a distance between the shielding portion and the switch circuit in the thickness direction of the display panel.

18. A display device, characterized in that: include: The display panel according to any one of claims 1 to 17.

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