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 at least partially surrounding the display area. The display area comprises a middle display area and an edge display area; the display panel further comprises a substrate; the driving circuit layer is positioned on one side of the substrate; the driving circuit layer comprises a hollow area, and the hollow area comprises a first groove located in the edge display area and a second groove located in the middle display area; the width of the first groove is larger than that of the second groove in the first direction, and the first direction is the direction from the non-display area to the display area. According to the display panel, the grooves are formed in the driving circuit layer, and the width of the grooves in the edge display areas is larger than that of the grooves in the middle display areas, so that cracks of the edge display areas extending from the edges to the middle display areas are blocked or reduced, and the impact resistance of the display panel is improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular, to a display panel and a display device. Background Art

[0002] At present, medium-size OLED (Organic Light Emitting Diode) display screens have become the mainstream display technology in the medium-size market due to advantages such as good display effect, high luminous efficiency, low power consumption, high color saturation, and wide viewing angle. For example, medium-size in-vehicle displays. However, their reliability requirements are relatively high, and it is urgent to improve the impact resistance of medium-size OLED display screens. Summary of the Invention

[0003] The present invention provides a display panel and a display device. By setting grooves in the driving circuit layer and setting the width of the grooves in the edge display area to be greater than the width of the grooves in the middle display area, cracks in the edge display area are blocked or reduced from extending to the middle display area, thereby improving the impact resistance of the display panel.

[0004] In a first aspect, an embodiment of the present invention provides a display panel, including a display area and at least a part of a non-display area surrounding the display area; the display area includes a middle display area and an edge display area; the edge display area is located between the middle display area and the non-display area;

[0005] The display panel further includes:

[0006] A substrate;

[0007] A driving circuit layer located on one side of the substrate; the driving circuit layer includes a hollowed-out area, and the hollowed-out area includes a first groove located in the edge display area and a second groove located in the middle display area; along a first direction, the width of the first groove is greater than the width of the second groove,

[0008] wherein, the first direction is the direction from the non-display area to the display area.

[0009] In a second aspect, an embodiment of the present invention further provides a display device, including the display panel provided in the first aspect.

[0010] The display panel provided by the embodiments of the present invention sets grooves in the driving circuit layers in the edge area and the central area of the display area of the display panel, and sets the width of the grooves in the edge display area to be greater than the width of the grooves in the middle display area, so as to block or reduce cracks in the edge display area from extending to the middle display area, thereby improving the impact resistance of the medium-size display panel. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0012] Figure 2 It is Figure 1 an enlarged schematic diagram of a display panel in the M area in

[0013] Figure 3 It is Figure 1 a cross-sectional schematic diagram of a display panel in along the AA' direction;

[0014] Figure 4 It is Figure 1 another enlarged schematic diagram of a display panel in the M area in

[0015] Figure 5 It is Figure 1 another enlarged schematic diagram of a display panel in the M area in

[0016] Figure 6 It is Figure 1 another enlarged schematic diagram of a display panel in the M area in

[0017] Figure 7 It is Figure 1 a cross-sectional schematic diagram of another display panel in along the AA' direction;

[0018] Figure 8 It is Figure 1 a cross-sectional schematic diagram of another display panel in along the AA' direction;

[0019] Figure 9 It is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0020] Figure 10 It is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0021] Figure 11 It is a schematic structural diagram of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that, for the sake of convenience of description, only parts related to the present invention are shown in the drawings rather than all structures.

[0023] Based on one or more of the above-mentioned problems, an embodiment of the present invention provides a display panel including a display area and a non-display area at least partially surrounding the display area; the display area includes an intermediate display area and an edge display area; the edge display area is located between the intermediate display area and the non-display area; the display panel further includes a substrate; a driving circuit layer is located on one side of the substrate; the driving circuit layer includes a hollowed-out area, and the hollowed-out area includes a first groove located in the edge display area and a second groove located in the intermediate display area; along a first direction, the width of the first groove is greater than the width of the second groove. Wherein, the first direction is the direction from the non-display area to the display area.

[0024] By adopting the above technical solution, in the embodiment of the present invention, grooves are provided in the driving circuit layer, and the width of the groove in the edge display area is greater than the width of the groove in the intermediate display area, so as to prevent or reduce cracks in the edge display area from extending to the intermediate display area, thereby improving the impact resistance of the medium-sized display panel.

[0025] The above is the core idea of the present invention. Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Figure 1 It is a schematic structural diagram of a display panel provided by an embodiment of the present invention. Figure 2 is Figure 1 An enlarged schematic diagram of a display panel in area M in Figure 3 is Figure 1 A cross-sectional schematic diagram of a display panel along the AA' direction in Figures 1 - 3 , the display panel 200 provided by the embodiment of the present invention includes a display area AA and a non-display area NA at least partially surrounding the display area AA. The display area AA includes an edge display area 01 and an intermediate display area 02. The edge display area 01 is located between the intermediate display area 02 and the non-display area NA. The display panel 200 further includes a substrate 20, and a driving circuit layer 30 is located on one side of the substrate 20; the driving circuit layer 30 includes a hollowed-out area W, and the hollowed-out area W includes a first groove A1 located in the edge display area 01 and a second groove A2 located in the intermediate display area 02. Along a first direction ( Figure 1 the positive X direction in Figure 1 ), the width D1 of the first groove A1 is greater than the width D2 of the second groove A2. Wherein, the first direction ( the positive X direction in ) is the direction from the non-display area NA to the display area AA.

[0027] Among them, the display panel 200 can be an OLED display panel, an LED (Light Emitting Diode) display panel, a Micro-LED (Micro Light Emitting Diode Display) display panel, a Mini-LED (Mini Light Emitting Diode) display panel, etc. The embodiments of the present invention do not limit the specific light-emitting type of the display panel. The display area AA can display images normally, and the non-display area NA at least partially surrounds the display area AA and is used to set signal traces and protect the display area, etc. The display area AA is divided into an intermediate display area 02 and an edge display area 01 according to the center and the edge. The intermediate display area 02 can be the central area of the display area, and the edge display area 01 is the edge area of the display area. The edge display area 01 at least partially surrounds the intermediate display area 02. Currently, in the applications of existing medium-sized display panels 200 in in-vehicle displays, laptop computers, or tablets (pads), etc., the sizes of the display panels are large and diverse. For example, 9.7 inches, 10.2 inches, 13.2 inches, etc. When they are impacted, the cracks generated in the edge area of the display area AA are extremely likely to extend to the inside. The embodiments of the present invention can reasonably adjust the width ranges of the intermediate display area 02 and the edge display area 01 of the display area AA in combination with the size of the display panel 200 and different impact forces, crack extension effects, etc. The embodiments of the present invention do not make limitations.

[0028] The present invention optimizes the structural design of the display panel for the problem that the edge cracks of the display area AA extend towards the center. Specifically:

[0029] Reference Figure 3 , the material of the substrate 20 includes but is not limited to rigid materials such as glass or silicon wafers, and can also be flexible materials such as ultra-thin glass, metal foils, or polymer plastic materials. The flexible or rigid substrate 20 can block oxygen and moisture and prevent moisture or impurities from diffusing into the interior of the display panel 200 through the substrate 20.

[0030] Reference Figure 3 , the driving circuit layer 30 includes a plurality of pixel circuits P. The pixel circuit P can be a 2T1C,

[0031] 4T1C, 7T1C, 7T2C, 8T1C, 8T2C and other circuit structures. The pixel circuit P includes a plurality of thin film transistors (Thin Film Transistor, TFT), storage capacitors, metal traces and other film layer structures (not shown in the embodiments of the present invention). Those skilled in the art should clearly understand and will not be elaborated here. Figure 3 In the attached

[0032] Exemplarily, continue to refer toFigure 3 , taking the top-gate thin-film transistor TFT as an example, the structure of the driving circuit layer 30 will be described. Specifically, the driving circuit layer 30 includes an active layer 311 on one side of the substrate 20, a gate insulating layer 312 on the active layer 311, a gate 313 and a first capacitor metal layer C1 on the gate insulating layer 312, a first interlayer insulating layer 314a on the gate 313, a second capacitor metal layer C2 on the first interlayer insulating layer 314, the first capacitor metal layer C1 and the second capacitor metal layer C2 are arranged opposite to each other to form a storage capacitor, a second interlayer insulating layer 314b on the second capacitor metal layer C2, a source electrode 315 and a drain electrode 316 on the second interlayer insulating layer 314b. Among them, the first interlayer insulating layer 314a and the second interlayer insulating layer 314b can be formed of inorganic insulating materials such as silicon oxide or silicon nitride. The source electrode 315 and the drain electrode 316 are electrically connected to the source region and the drain region respectively through contact holes ( Figure 3 not shown in the figure), and the source electrode 315 and the drain electrode 316 can be metals such as Cr, Pt, Ru, Au, Ag, Mo, Al, W, Cu and / or AlNd, or metal or conductive oxides such as ITO, GIZO, GZO, IZO (InZnO), AZO (AlZnO). Further, the driving circuit layer 30 further includes a passivation layer 317 on the source electrode 315 and the drain electrode 316, for example, a planarization layer (Planarization Layer), etc., and its material can be formed of organic insulating materials such as organic polymers, such as spin-on glass (Spin-On Glass, SOG), polyimide (PI), etc. The drain electrode 315 of the thin-film transistor 31 is electrically connected to the first electrode 41 (anode) of the light-emitting element 40 through the connection electrode 318 to realize the connection between the pixel circuit P and the light-emitting element 40, and the pixel circuit P provides a driving voltage to the light-emitting element 40 to drive the light-emitting element 40 to emit light. Among them, the light-emitting element 40 further includes a light-emitting layer 42 and a second electrode 43 (cathode), and the material of the light-emitting layer 42 can be a low-molecular or high-molecular organic light-emitting material. The first electrode 41 and the second electrode 43 can adopt transparent conductive materials, for example, ITO (indium tin oxide), IZO (indium zinc oxide), ITO / Ag / ITO, etc.

[0033] It should be noted that Figures 1 - 3 and only one light-emitting element 40 within the middle display area 02 and the edge display area 01 in the following drawings of the present invention is used for exemplary illustration, and more light-emitting elements 40 are not shown one by one. In other embodiments, the light-emitting element 40 can also be an LED, a Micro-LED, a Mini-LED, etc., and the embodiments of the present invention are only exemplified by OLED.

[0034] Combined with Figure 2 andFigure 3 As shown, in the embodiments of the present invention, one or more film layers of the driving circuit layer 20 in the edge region and the central region of the display area AA are etched to form grooves, a hollowed-out area W is formed by reducing the number of film layers in this region, and the cracks in the edge display area 01 are blocked or reduced from extending to the middle display area 02 through the grooves in the film layers. Among them, the film layer in the edge display area 01 is grooved to form a first groove A1, and the film layer in the middle display area 02 is grooved to form a second groove A2. Considering that the middle display area 02 is the core area for displaying images, when the edge of the display panel is impacted or squeezed by an external force, usually the crack extends towards the center of the display area AA. The present invention makes a differential design for the grooves in the two regions, and sets the width D1 of the first groove A1 in the edge display area 01 to be greater than the width D2 of the second groove A2 in the middle display area 02. Along Figure 1 the X direction in the figure, the first groove A1 is designed with a larger width D1, and the extension path of the crack is blocked by expanding the width D1 of the first groove A1, optimizing the path for blocking the crack extension. Further, the second groove A2 has a smaller width D2. While achieving the function of blocking cracks, the integrity of the film layer structure of the driving circuit layer 20 in the middle display area 02 can be maximally retained, ensuring the normal display performance of the display area AA.

[0035] It should be noted that the display panel 200 further includes other functional film layers, such as an encapsulation layer, etc. The encapsulation layer is a thin-film encapsulation (TFE), which may include multiple inorganic layers and organic layers to isolate water and oxygen and avoid the influence of external moisture and oxygen on the materials of the light-emitting layer 42. The multiple film layers work together to achieve the normal display of the display panel, which will not be elaborated here.

[0036] In summary, the display panel provided by the embodiments of the present invention, by setting grooves in the driving circuit layer and setting the width of the grooves in the edge display area to be greater than the width of the grooves in the middle display area, blocks or reduces the cracks in the edge display area from extending from the edge to the middle display area, thereby improving the impact resistance of the medium-sized display panel.

[0037] On the basis of the above embodiments, continue to refer to Figure 3 , the driving circuit layer 30 further includes multiple inorganic layers and multiple organic layers, and the number of film layers of the inorganic layer in the hollowed-out area W is less than that of the inorganic layer in the non-hollowed-out area. Among them, at least one organic layer fills the first groove A1 and the second groove A2. Among them, the non-hollowed-out area refers to the area in the driving circuit layer 30 where the first groove A1 and the second groove A2 are not dug.

[0038] Continue to refer to Figure 3, the driving circuit layer 30 includes multiple inorganic layers and multiple organic layers stacked alternately. The inorganic layers are mainly composed of insulating materials such as silicon dioxide (SiO2) and silicon nitride (Si3N4), which play the functions of electrical isolation and mechanical support, such as the second interlayer insulating layer 314b located on the gate 313. The organic layers are made of polymer materials such as polyimide (PI) and photoresist, which are used to fill gaps and improve surface flatness, such as the passivation layer 317 located on the source electrode 315 and the drain electrode 316. Due to the characteristics of inorganic materials, the environment where the inorganic layers are located, etc., it is easy to cause crack propagation. Specifically, in terms of structure, inorganic materials usually have high hardness and brittleness. When subjected to external forces, atoms or molecules inside the materials are difficult to relieve stress through methods such as dislocation movement, and stress is likely to concentrate in local areas. Once the stress exceeds the strength limit of the material, cracks will be generated. And once cracks are formed, due to the lack of plastic deformation ability of the materials, it is difficult to prevent the further expansion of the cracks, so the cracks tend to extend along the inorganic layers. In terms of performance, the thermal expansion coefficient of inorganic materials is usually small. When the environmental temperature changes drastically, large thermal stresses will be generated inside the inorganic layers. If the thermal stress exceeds the strength of the material, cracks will be induced. Moreover, during the process of cyclic temperature changes, the cracks will continue to expand because each temperature change will change the stress state at the crack tip, prompting the cracks to further extend.

[0039] Based on this, in the embodiments of the present invention, through the structural design of the inorganic layer in the driving circuit layer 30, the number of inorganic layer film layers in the hollowed-out area W is set to be less than that in the non-hollowed-out area, so as to reduce the extension of cracks in the hollowed-out area W along the inorganic layer to the non-hollowed-out area, thereby blocking or reducing the further extension of cracks. Further, considering that the organic layer usually has good flexibility and elasticity, the present invention arranges the organic layer to fill the first groove A1 and the second groove A2, so that the inorganic layer (the first interlayer insulating layer 314a and the second interlayer insulating layer 314b) and the organic layer (the passivation layer 317) are stacked. When cracks occur in the inorganic layer, the organic layer can play a role in buffering and preventing the expansion of cracks. The organic layer can absorb part of the energy of crack expansion, hinder the cracks when they expand to the organic layer, and thus reduce the possibility of cracks extending infinitely along the inorganic layer. It should be noted that at least one organic layer is designed to fill the first groove A1 and the second groove A2. These grooves are usually etched from the underlying inorganic layer and are used to accommodate structures such as wires and transistor electrodes. Due to its good fluidity (such as when spin-coated into a film) and patterning characteristics, the organic layer can completely fill the internal acute angles or areas with a large aspect ratio in the grooves, eliminate air gaps or voids, and avoid film defects (such as cracking and uneven thickness) caused by surface unevenness during the direct deposition of the inorganic layer. In addition, the flexibility of the organic layer can relieve the stress generated by the difference in the coefficient of thermal expansion between layers and improve the long-term reliability of the driving circuit layer 30. When the display panel 200 is impacted by an external force, it is beneficial to improve the impact resistance of the display panel and ensure the normal display of the display panel 200.

[0040] As an example, continuing to refer to Figure 3 , the inorganic layers (the first interlayer insulating layer 314a and the second interlayer insulating layer 314b) in the hollowed-out area W in the edge display area 01 and the middle display area 02 can be completely etched and filled with the organic layer (the passivation layer 317) to completely block the path of crack propagation along the inorganic layer (the interlayer insulating layer) to the center of the display area AA, thereby improving the impact resistance of the display panel.

[0041] It should be noted that through the structural design of the differential layout of the number of inorganic layer film layers in the hollowed-out area W and the filling of the organic layer in the embodiments of the present invention, while ensuring the electrical performance, the process feasibility can be optimized, which is particularly suitable for the precision manufacturing of driving circuits in high-resolution display panels or flexible electronic devices, and improves the impact resistance of medium-sized display panels.

[0042] On the basis of the above embodiments, continuing to refer to Figure 3, the distance D between the surface of the organic layer filling the first groove A1 and the second groove A2 away from the substrate 20 and the substrate 20 is equal. In the embodiment of the present invention, the trench processing can be performed on part of the film layer of the driving circuit layer 30 through photolithography and dry etching processes, and then the first groove A1 and the second groove A2 are filled with the organic layer, so that the surfaces of the organic layer corresponding to the grooves and the organic layer corresponding to the non-hollowed area away from the substrate 20 are made to be of the same height. In this way, the surface flatness of the entire driving circuit layer 30 is effectively guaranteed, which is beneficial to subsequent process operations and the stability of device performance.

[0043] Based on the above embodiments, in combination with Figure 2 and Figure 3 , the driving circuit layer 30 further includes a plurality of pixel circuits P, and the first groove A1 and the second groove A2 are respectively located between two adjacent pixel circuits P. In the embodiment of the present invention, in order to prevent cracks from extending between the pixel circuits P, trenches can be dug between two adjacent pixel circuits P. Specifically, since the edge display area 01 is more vulnerable to external stresses (such as bending and impact), by providing at least one first groove A1 between two adjacent pixel circuits P in the edge display area 01, the presence of the first groove A1 can form a stress buffer zone, dispersing the concentrated stress into the groove structure and preventing cracks from directly extending from one pixel circuit P to the adjacent pixel circuit P. At the same time, although the stress in the middle area is relatively small, the dense pixel circuit P array layout may still cause microcracks due to differences such as stress extrusion or thermal expansion. By providing at least one second groove A2 between two adjacent pixel circuits P in the middle display area 02, the second groove A2 can play a physical isolation role, inhibiting the cross-pixel lateral expansion of cracks between the array pixel circuits P, thereby improving the long-term reliability of the display panel.

[0044] Based on the above embodiments, in combination with Figure 2 and Figure 3 , all the pixel circuits P have the same size. Herein, the pixel circuits P having the same size means that the circuit structures (including components such as transistors, capacitors, and electrodes and their layouts) corresponding to the respective pixel units constituting the display screen of the display panel are kept consistent in physical size. In the embodiment of the present invention, setting all the pixel circuits P to have the same size can ensure that the electrical characteristics (such as driving current and voltage response) of each pixel are highly unified, avoiding unevenness in brightness, color, etc. (such as "color patches" and "brightness drift") caused by circuit parameter differences, thereby improving the quality of the display screen.

[0045] Figure 4 is Figure 1 Another enlarged schematic diagram of the display panel in the M area in Figure 4, the pixel circuit P includes a first pixel circuit P1 located in the edge display area 01 and a second pixel circuit P2 located in the middle display area 02. Among them, the size of the first pixel circuit P1 is smaller than that of the second pixel circuit P2. In the embodiment of the present invention, the first pixel circuit P1 adopts a more compact size design, and compared with the second pixel circuit P2, it occupies a smaller area. This optimization reserves a larger layout space for the hollowed-out area of the inorganic layer in the edge display area 01, thereby improving the overall design flexibility of the display panel.

[0046] It should be noted that Figures 2 - 4 only shows one first pixel circuit P1 located in the edge display area 01 and one second pixel circuit P2 located in the middle display area 02. The boundary between the edge display area 01 and the middle display area 02 is not visible to the naked eye on the display panel 200. In order to facilitate the division of the structural design of the driving circuit layer 30 in the present invention, a pixel circuit P can be shared at the boundary between the edge display area 01 and the middle display area 02.

[0047] Figure 5 is Figure 1 an enlarged schematic diagram of another display panel in the M area in. On the basis of the above embodiment, refer to Figure 5 , the first groove A1 includes a plurality of first sub-grooves A1a, and the second groove A2 includes a plurality of second sub-grooves A2a. The number of first sub-grooves A1a between two adjacent first pixel circuits P1 in the edge display area 01 is greater than the number of second sub-grooves A2a between two adjacent second pixel circuits P2 in the middle display area 02.

[0048] In the embodiment of the present invention, by setting more groove structures between adjacent pixel circuits, such as the first groove A1 is composed of a plurality of first sub-grooves A1a, and the second groove A2 is composed of a plurality of second sub-grooves A2a, the density of the first sub-grooves A1a between adjacent first pixel circuits P1 in the edge display area 01 is higher than the density of the second sub-grooves A2a between adjacent second pixel circuits P2 in the middle display area 02. Through the differential arrangement design of the number of grooves, the lateral expansion path of cracks can be gradually extended, thereby suppressing the cross-pixel lateral expansion of cracks between array pixel circuits P, and significantly improving the long-term reliability of the display panel under mechanical shock or thermal stress.

[0049] On the basis of the above embodiment, continue to refer to Figure 5 , along the first direction ( Figure 5 the X direction in), the widths of the plurality of first sub-grooves A1a are equal; and / or, the widths of the plurality of second sub-grooves A2a are the same.

[0050] In some embodiments, along the first direction ( Figure 5In the X direction, multiple first sub-grooves A1a between adjacent first pixel circuits P1 in the edge display area 01 are designed with equal widths; and / or, the second sub-grooves A2a between adjacent second pixel circuits P2 in the middle display area 02 also maintain an equal-width design. In the embodiments of the present invention, implementing a unified width process parameter for the sub-grooves within the same hollow area and / or all hollow areas can significantly improve the uniformity of the groove etching process, thereby enhancing the manufacturing precision and reliability of the display panel. Further, when etching grooves in the inorganic layer, the unified width process parameter can also reduce the deformation rate of the inorganic layer etching, improve the stress distribution uniformity of the driving circuit layer 30, reduce the risk of crack path deviation caused by groove width differences, and ultimately improve the consistency of crack propagation suppression between the array pixel circuits P.

[0051] Based on the above embodiments, continue to refer to Figure 5 , along the first direction ( Figure 5 the X direction in ), the widths of multiple first grooves A1 are equal; and / or, the widths of multiple second grooves A2 are equal. In the embodiments of the present invention, each of the first grooves A1 maintains an equal-width design, and / or each of the second grooves A2 has a uniform width. It can also be understood that when a first sub-groove A1a is provided between adjacent first pixel circuits P1, the width of the first sub-groove A1a is the width of the first groove A1, and when multiple first sub-grooves A1a are included, the widths of the multiple first sub-grooves A1a are the width of the first groove A1. Similarly, when a second sub-groove A2a is provided between adjacent second pixel circuits P2, the width of the second sub-groove A2a is the width of the second groove A2; when multiple second sub-grooves A2a are included, the widths of the multiple second sub-grooves A2a are the width of the second groove A2. This structural design can standardize the groove width design, ensure the consistency of the etching process, and at the same time provide a flexible structural configuration scheme between different pixel circuits.

[0052] Figure 6 is Figure 1 an enlarged schematic diagram of another display panel in the M area in, based on the above embodiments, refer to Figure 6 , the driving circuit layer 30 further includes multiple signal connection areas B, and the signal connection areas B are located between adjacent two pixel circuits P. In the embodiments of the present invention, signal connection areas B can also be reserved between adjacent pixel circuits to provide wiring space for common signal transmission. For example, it can carry key control signals such as a scan signal (Scan), an emission control signal (Emit), a reference voltage (vref), a power supply voltage signal (PVDD), etc., to ensure the stability of display driving.

[0053] Figure 7 is Figure 1 a cross-sectional schematic diagram of a display panel along the AA' direction in, based on the above embodiments, continue to refer toFigure 5 and Figure 7 The signal connection region B is located between two adjacent first grooves A1; and / or, the signal connection region B is located between two adjacent second grooves A2. In the embodiment of the present invention, by integrating the signal connection region B into the gap region between the grooves, effective layout of signal lines can be achieved, and the structural space between pixel circuits P can be fully utilized to optimize the layout density of signal lines in the display panel.

[0054] Based on the above embodiments, continue to refer to Figures 2 - 7 , the non-display region NA further includes a third groove A3, and the width D3 of the third groove A3 is greater than the width D2 of the second groove A2. In the embodiment of the present invention, when transitioning from the non-display region NA to the edge display region 01 and the middle display region 02, by differentially setting the decreasing groove widths, the non-display region NA can adapt to more complex stress distributions, inhibit or improve the extension of cracks into the display region AA, thereby enhancing the structural reliability of the panel edge. Specifically, referring to Figure 3 , the inorganic layers (the first interlayer insulating layer 314a and the second interlayer insulating layer 314b) in the non-display region NA can be completely etched, and then the grooves are filled with an organic layer (the passivation layer 317) to buffer and prevent crack propagation.

[0055] Figure 8 is Figure 1 A cross-sectional schematic diagram of a display panel along the AA' direction in Figure 8 , along the direction perpendicular to the plane where the substrate 20 is located ( Figure 8 the Z direction in

[0056] Based on the above embodiments, continue to refer to Figure 8, the non-display area NA further includes a third groove A3, and the depth H3 of the third groove A3 is greater than the depth H2 of the second groove A2. In the embodiment of the present invention, when transitioning from the non-display area NA to the edge display area 01 and the middle display area 02, through the differential setting of the decreasing groove depth, the first interlayer insulating layer 314a and the second interlayer insulating layer 314b in the non-display area NA are completely etched, and a part of the inorganic layer in the edge display area 01 and the middle display area 02 is etched to obtain H3 > H1 > H2, and then the groove is filled with an organic layer (passivation layer 317) to buffer and prevent crack propagation, and at the same time, the overall structural stability of the display area AA can be maintained, so as to balance the stress distribution and the film layer consistency.

[0057] Figure 9 is a schematic structural diagram of another display panel provided by an embodiment of the present invention. On the basis of the above embodiment, refer to Figure 9 , the orthographic projection of the first groove A1 and / or the second groove A2 on the substrate 20 is a continuous projection. In the embodiment of the present invention, the pixel circuits P usually adopt an array arrangement. In the present invention, a plurality of first grooves A1 that continuously surround the middle display area 02 are etched in the edge display area 01 to form a crack prevention barrier to prevent cracks from extending between the pixel circuits P in the edge display area 01. The middle display area 02 can also be etched with a second groove A2 that continuously surrounds the center of the display area AA to form a crack prevention network to prevent cracks from extending between the pixel circuits P in the middle display area 02, thereby effectively preventing cracks from extending across regions between the pixel circuits P. Optimizing the crack prevention structure according to the characteristics of different display areas can significantly improve the long-term structural reliability of the display panel.

[0058] Among them, the depth, width, etc. of the continuously surrounding first groove A1 can be the same or different, and the embodiment of the present invention can be reasonably designed according to the arrangement of the pixel circuits P, and the embodiment of the present invention does not make any restrictions.

[0059] Figure 10 is a schematic structural diagram of another display panel provided by an embodiment of the present invention. On the basis of the above embodiment, refer to Figure 10 , the orthographic projection of the first groove A1 on the substrate 20 is arranged at equal intervals around the middle display area 02; and / or, the orthographic projection of the second groove A2 on the substrate 20 is arranged at equal intervals around the center of the display area AA. In the embodiment of the present invention, the "patterning" process can be used to etch the groove. Among them, the orthographic projection of the first groove A1 on the substrate 20 can be arranged in an equally spaced circular array around the middle display area 02; and / or, the orthographic projection of the second groove A2 on the substrate 20 is arranged in an equally spaced circular array around the center of the display area AA. This arrangement can establish multiple crack prevention paths to ensure uniform stress distribution and inhibit crack propagation.

[0060] In other embodiments, the adjacent first grooves A1 and / or the adjacent second grooves A2 can also be arranged in a dislocation manner to enhance the crack blocking effect and meet the crack suppression and protection requirements of different display regions.

[0061] Herein, the "patterning" specifically refers to a non-whole-layer structure, that is, a structure formed by first forming a whole-layer material and then engraving a specific shape during the manufacturing process.

[0062] Based on the above embodiments, the surface topography of the first groove A1 and / or the second groove A2 facing the substrate 20 includes a flat surface, a convex surface, a concave surface, and a concave-convex surface. It should be noted that the embodiments of the present invention do not limit the surface topography of the first groove A1 and / or the second groove A2 facing the substrate 20. By setting a concave-convex surface, etc., the crack propagation path can be extended, the extrusion stress can be released, and the crack propagation can be inhibited.

[0063] Based on the same inventive concept, the embodiments of the present invention also provide a display device. Figure 11 It is a schematic structural diagram of a display device provided by an embodiment of the present invention. Combining Figure 11 As shown, the display device 300 includes any one of the display panels 200 provided in the above embodiments. Therefore, the display device 300 also has the beneficial effects of the display panel 200 in the above embodiments. The same parts can be understood with reference to the explanation of the display panel 200 above, and will not be repeated hereinafter.

[0064] The display device 300 provided by the embodiments of the present invention can be Figure 11 the in-vehicle display screen shown, or any electronic product with a display function, including but not limited to the following categories: mobile phones, televisions, laptop computers, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, industrial control devices, medical display screens, touch interaction terminals, etc. The embodiments of the present invention do not make special limitations on this.

[0065] Note that the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the inventive concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that, It includes a display area and a non-display area at least partially surrounding the display area; the display area includes an intermediate display area and an edge display area; the edge display area is located between the intermediate display area and the non-display area; The display panel further includes: A substrate; A driving circuit layer located on one side of the substrate; the driving circuit layer includes a hollowed-out area, and the hollowed-out area includes a first groove located in the edge display area and a second groove located in the intermediate display area; along a first direction, the width of the first groove is greater than the width of the second groove, wherein the first direction is the direction from the non-display area to the display area.

2. The display panel according to claim 1, wherein The driving circuit layer further includes multiple inorganic layers and multiple organic layers, and the number of film layers of the inorganic layer in the hollowed-out area is less than the number of film layers of the inorganic layer in the non-hollowed-out area; wherein, at least one organic layer fills the first groove and the second groove.

3. The display panel according to claim 2, wherein, The distance between the surface of the organic layer filling the first groove and the second groove away from the substrate and the substrate is equal.

4. The display panel according to claim 1, wherein The driving circuit layer further includes multiple pixel circuits, and the first groove and the second groove are respectively located between two adjacent pixel circuits.

5. The display panel according to claim 4, wherein All the pixel circuits have the same size.

6. The display panel according to claim 4, wherein The pixel circuit includes a first pixel circuit located in the edge display area and a second pixel circuit located in the intermediate display area; wherein, the size of the first pixel circuit is smaller than the size of the second pixel circuit.

7. The display panel according to claim 6, wherein The first groove includes multiple first sub-grooves, and the second groove includes multiple second sub-grooves, The number of the first sub-grooves between two adjacent first pixel circuits in the edge display area is greater than the number of the second sub-grooves between two adjacent second pixel circuits in the intermediate display area.

8. The display panel according to claim 7, characterized in that, Along the first direction, the widths of multiple first sub-grooves are equal; and / or, the widths of multiple second sub-grooves are the same.

9. The display panel according to claim 7, characterized in that Along the first direction, the width of the first sub-groove is the same as the width of the second sub-groove.

10. The display panel according to claim 4, characterized in that, The driving circuit layer further includes multiple signal connection areas, and the signal connection areas are located between two adjacent pixel circuits.

11. The display panel according to claim 10, characterized in that, The signal connection area is located between two adjacent first grooves; and / or, the signal connection area is located between two adjacent second grooves.

12. The display panel according to claim 1, wherein Along the first direction, the widths of multiple first grooves are equal; and / or, the widths of multiple second grooves are equal.

13. The display panel according to claim 1, wherein The non-display area further includes a third hollowed-out area, and the width of the third hollowed-out area is greater than the width of the second groove.

14. The display panel according to claim 1, wherein Along the direction perpendicular to the plane where the substrate is located, the depth of the first groove is greater than the depth of the second groove.

15. The display panel according to claim 14, wherein The non-display area further includes a third hollowed-out area, and the depth of the third hollowed-out area is greater than the depth of the second groove.

16. The display panel according to claim 1, wherein, The orthographic projection of the first groove and / or the second groove on the substrate is a continuous projection.

17. The display panel according to claim 1, wherein The orthographic projection of the first groove on the substrate is arranged equidistantly around the intermediate display area; and / or, the orthographic projection of the second groove on the substrate is arranged equidistantly around the center of the display area.

18. The display panel according to claim 1, wherein The surface topography of the first groove and / or the second groove facing the substrate substrate includes a flat surface, a convex surface, a concave surface, and a concave-convex surface.

19. A display device, characterized in that, A display panel according to any one of claims 1-18.

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