Display panel and display device

Abstract

The invention provides a display panel and a display device, and relates to the technical field of display. The display panel comprises a display area and a bending area which are adjacently arranged, and the display panel comprises a substrate; the first organic layer is located on one side of the substrate, and in the bending area, the side, away from the substrate, of the first organic layer is provided with at least one groove; the metal layer is located on the side, away from the substrate, of the first organic layer; wherein in the bending area, at least part of the metal layer extends in the first direction intersecting with the extending direction of the bending area and extends on the side, away from the substrate, of the groove, and the extending direction of the groove intersects with the first direction, so that the bending stress resistance of the metal layer in the bending area is improved, the yield of the display panel is further improved, and meanwhile the width of the frame is reduced.

Description

Technical Field

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

[0002] High screen-to-body ratio and narrow bezel design are important trends in current smartphone design, aiming to enhance the user's visual experience and convenience in daily use. To achieve narrow bezel design, pad bending technology is usually applied to the lower bezel area of ​​the display panel. Pad bending technology achieves the purpose of reducing the bezel width by bending the part of the display panel close to the lower bezel toward the backlight side of the display panel.

[0003] However, during the bending process, the metal layer in the bending area is easily affected by stress and breaks, resulting in broken signal connections after bending, and a low yield rate of the display panel. At the same time, the film layer structure in the bending area will limit the bending angle of the bending area, thereby limiting the width of the lower frame. Summary of the invention

[0004] In view of this, the embodiments of the present disclosure provide a display panel and a display device to improve the anti-bending stress of the metal layer in the bending area and reduce the frame width.

[0005] A first aspect of the present disclosure provides a display panel, comprising a display area and a bending area arranged adjacent to each other, the display panel comprising: a substrate; a first organic layer, located on one side of the substrate, wherein in the bending area, at least one groove is provided on the side of the first organic layer facing away from the substrate; a metal layer, located on the side of the first organic layer facing away from the substrate; wherein, in the bending area, at least part of the metal layer extends along a first direction intersecting with an extension direction of the bending area, and extends on a side of the groove facing away from the substrate, and the extension direction of the groove intersects with the first direction.

[0006] In some embodiments, the metal layer extends along the surface of the first organic layer away from the substrate, and the portion of the metal layer located in the groove presents a bent structure. Optionally, the metal layer extends along the surface of one side of the inner wall of the groove away from the substrate. Optionally, the material of the first organic layer includes organic glue.

[0007] In some embodiments, the extending direction of the groove is perpendicular to the first direction, and the length of the groove is less than or equal to the extending length of the bending zone.

[0008] In some embodiments, there are multiple grooves, and the multiple grooves are arranged at intervals along the first direction. Optionally, the first direction is perpendicular to the extending direction of the bending area.

[0009] In some embodiments, the spacing between adjacent grooves is equal.

[0010] In some embodiments, the metal layer includes a metal trace, and the extension direction of the metal trace intersects with the extension direction of the groove. Optionally, the extension direction of the metal trace is perpendicular to the extension direction of the groove. Optionally, there are multiple metal traces, and the multiple metal traces extend along a side surface of the groove away from the substrate.

[0011] In some embodiments, in a cross section perpendicular to an extending direction of the groove, a cross-sectional shape of the groove includes a trapezoid.

[0012] In some embodiments, the groove penetrates the first organic layer, and the metal layer contacts the portion of the substrate exposed in the groove. Optionally, the substrate includes a buffer layer, the groove exposes a portion of the buffer layer, and the metal layer contacts the portion of the buffer layer.

[0013] In some embodiments, the display panel further comprises a second organic layer located on a side of the metal layer facing away from the substrate. Optionally, part of the second organic layer fills the groove, and / or part of the second organic layer covers the side of the metal layer in the groove facing away from the substrate. Optionally, the material of the second organic layer comprises an organic glue. Optionally, in the display area, the display panel further comprises an inorganic layer located between the substrate and the first organic layer.

[0014] A second aspect of the present disclosure provides a display device, comprising the display panel provided by the first aspect.

[0015] In the display panel provided by the present disclosure, the metal layer in the bending area extends on the side of the groove away from the substrate, so that the metal layer is bent at a certain angle in the bending area along the surface shape of the groove. Therefore, during the bending process of the bending area, the bending structure of the metal layer stretches and extends along the deformation direction of the bending area, and the bending degree of the bending structure of the metal layer is reduced accordingly, so as to disperse the bending stress of the metal layer during the bending process, improve the bending stress resistance of the metal layer, reduce the risk of fracture of the metal layer, and thus improve the yield of the display panel. At the same time, the bending angle of the bending area can be increased to achieve a narrower lower frame design. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other purposes, features and advantages of the present disclosure will become more apparent by describing the embodiments of the present disclosure in more detail in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. In the drawings, the same reference numerals generally represent the same components or structures.

[0017] Figure 1 Shown is a schematic diagram of the cross-sectional structure of a display panel in the lower frame area in the related art.

[0018] Figure 2 Shown is a top view of a display panel provided by an embodiment of the present disclosure.

[0019] Figure 3 Shown Figure 2 The cross-sectional structure diagram of the display panel along line CC' is shown.

[0020] Figure 4a Shown Figure 2 A partial enlarged view of the display panel at the D area is shown.

[0021] Figure 4b Shown Figure 2 Another partial enlarged view of the display panel at the D area is shown.

[0022] Figure 4c Shown Figure 2 Another partial enlarged view of the display panel at the D area is shown.

[0023] Figure 5a Shown Figure 3 A partial enlarged view of the display panel at the groove position is shown.

[0024] Figure 5b Shown Figure 3 Another partial enlarged view of the display panel at the groove position is shown.

[0025] Figure 6 Shown is a schematic cross-sectional structure diagram of a display panel provided in another embodiment of the present disclosure.

[0026] Figure 7 Shown Figure 2 Another partial enlarged view of the display panel at the D area is shown.

[0027] Figure 8 Shown is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present disclosure.

[0028] Fig. 9 Shown Figure 1 A top view of the display panel is shown. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this specification.

[0030] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the inventive product is usually placed when in use, which are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In the related art, in order to reduce the size of the lower frame of the display panel, a pad bending design is used in the lower frame area. Figure 1 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel in the lower frame area in the related art. Figure 1 As shown, the cross-sectional structure of the display panel includes a display area AA and a bending area BA. The film layer structure of the display area AA includes a substrate 110, an inorganic layer 120, a first organic layer 130, a metal layer 140 and a second organic layer 150 which are stacked.

[0032] In order to prevent the inorganic film layer from rigidly breaking during bending, the inorganic layer 120 in the bending area BA is usually removed, so that in the film structure of the bending area BA, the metal layer 140 is located between the first organic layer 130 and the second organic layer 150. During the bending process of the bending area BA, the tensile stress in the film layer above the metal layer 140 and the compressive stress in the film layer below the metal layer 140 offset each other, so that the metal layer 140 is located in the neutral layer position, so as to minimize the stress on the metal layer 140 during the bending process.

[0033] However, due to process fluctuations, the thickness of the first organic layer 130 and the second organic layer 150 is uneven, so the actual positions of the metal layer 140 and the neutral layer may deviate, causing the metal layer 140 to break, resulting in display abnormalities and a low yield of the display panel.

[0034] At the same time, the thickness of the first organic layer 130 limits the bending angle of the bending area BA, thereby limiting the width of the border area from being further reduced, so that the screen cannot have an extremely narrow border.

[0035] To solve the above problems, the present disclosure provides a display panel, including a display area and a bending area arranged adjacent to each other, the display panel including: a substrate; a first organic layer, located on one side of the substrate, in the bending area, at least one groove is provided on the side of the first organic layer away from the substrate; a metal layer, located on the side of the first organic layer away from the substrate; wherein, in the bending area, at least part of the metal layer extends along a first direction intersecting with the extension direction of the bending area, and extends on the side of the groove away from the substrate, and the extension direction of the groove intersects with the first direction. In the present disclosure, the metal layer in the bending area extends on the side of the groove away from the substrate, so that the metal layer is bent at a certain angle along the surface shape of the groove in the bending area. Therefore, during the bending process of the bending area, the bending structure of the metal layer stretches and extends along the deformation direction when the bending area is bent, and the bending degree of the bending structure of the metal layer is reduced accordingly, so as to disperse the bending stress of the metal layer during the bending process, improve the bending stress resistance of the metal layer, reduce the risk of fracture of the metal layer, and thus improve the yield of the display panel. At the same time, the bending angle of the bending area can be increased to achieve a narrower lower frame design.

[0036] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0037] Figure 2 FIG. 1 is a top view of a display panel provided by an embodiment of the present disclosure. Figure 2 As shown, the display panel includes a display area AA, a bending area BA and a non-display area NA which are adjacently arranged.

[0038] The display area AA is the area in the display panel used for image display, and usually includes a plurality of pixels. The bending area BA is used to connect the non-display area NA and the display area AA, and can be bent toward the backlight side of the display panel so that the non-display area NA is bent to the back of the display panel. There is signal transmission between the non-display area NA and the display area AA, and accordingly, the bending area BA includes a metal layer that plays an electrical connection role.

[0039] Exemplarily, the non-display area NA may be a bonding area for connecting with peripheral driver integrated circuits, flexible circuit boards, etc. Alternatively, in another embodiment of the present disclosure, the non-display area NA may also be any other area around the display area AA.

[0040] The bending area extension direction D3 refers to the extension direction of the frame close to the bending area BA, or can also be understood as the width direction of the bending area BA.

[0041] Understandably, Figure 2 In the display panel shown, the bending area BA is in an unbent state; in the actual production process, the bending area BA needs to be bent so that the non-display area NA is bent to the backlight side of the display panel for binding. When the bending area BA is bent, its width will be wider than Figure 2 The indicated width is narrower.

[0042] Figure 3 Shown Figure 2 The cross-sectional structure diagram of the display panel along CC' is shown in FIG. Figure 3 As shown, the display panel includes a substrate 110 , a first organic layer 130 and a metal layer 140 . The first organic layer 130 is located on one side of the substrate 110 , and the metal layer 140 is located on a side of the first organic layer 130 away from the substrate 110 .

[0043] In the bending area BA, the first organic layer 130 includes a groove 131 . Figure 4a Shown Figure 2 The partial enlarged view of the display panel at the D area is shown. Figure 4a As shown, in the bending area BA, at least part of the metal layer 140 extends along the first direction D1 intersecting with the bending area extension direction D3 and extends on the side of the groove 131 away from the substrate 110. The groove extension direction D2 intersects with the first direction D1.

[0044] The first direction D1 intersects with the bending area extension direction D3. Figure 2 When the bending area BA is not bent, the first direction D1 can also be understood as the direction from the display area AA to the non-display area NA.

[0045] At the position of the groove 131, the metal layer 140 is bent along the inner wall surface of the groove 131 toward the substrate 110, so that the metal layer is bent at a certain angle along the surface shape of the groove. At the same time, the first organic layer 130 is provided to provide support for the metal layer 140, so as to prevent the metal layer 140 from being unexpectedly deformed or even damaged by external forces.

[0046] In the embodiment of the present disclosure, in the cross section of the bending area BA along the first direction D1, as shown in FIG. Figure 3 As shown in FIG. 1 , the length of the orthographic projection of the metal layer 140 on the substrate is smaller than the actual length of the metal layer 140. Figure 1 In the display panel shown, the length of the metal layer 140 is increased. Therefore, during the bending process of the bending area BA, the metal layer 140 is deformed by force, so that the bending structure of the metal layer 140 is stretched and extended along the bending direction of the bending area BA, and the bending degree of the bending structure is reduced accordingly, so as to disperse the bending stress of the metal layer 140 during the bending process, improve the bending stress resistance of the metal layer 140, and further improve the yield of the display panel.

[0047] In the embodiment of the present disclosure, the metal layer 140 does not need to be set at the neutral layer position, and the metal layer 140 is less likely to break during the bending process, so the bending angle of the bending area BA can be increased to achieve a narrower lower frame design.

[0048] In some embodiments, continue to refer to Figure 3 In the bending area BA, the metal layer 140 extends along the surface of the first organic layer 130 away from the substrate 110. In the non-groove portion of the first organic layer 130, the metal layer 140 does not bend, and in the groove 131 portion, the metal layer 140 extends along the sidewall and bottom surface of the groove 131, so that the part of the metal layer 140 in the groove 131 presents a bending structure, and the bending shape of the bending structure conforms to the cross-sectional shape of the groove 131 in the first direction D1. In other words, the bending angle of the bending structure is consistent with the bending angle of the cross-sectional shape of the groove 131 in the first direction D1.

[0049] Optionally, the metal layer 140 extends along the side surface of the inner wall of the groove away from the substrate 110, that is, the metal layer 140 can be in direct contact with the side surface of the groove 131. Alternatively, other film layers can be provided between the metal layer 140 and the groove 131, as long as the metal layer 140 is bent at a certain angle at the position of the groove 131.

[0050] Optionally, the material of the first organic layer 130 includes organic glue. The organic glue material has excellent anti-bending ability and is easy to etch, which reduces the difficulty of preparing the groove 131.

[0051] In some embodiments, the groove extension direction D2 is perpendicular to the first direction D1. Therefore, during the bending process of the bending area BA, the groove 131 helps to more evenly distribute the bending stress generated by the bending, reduce stress concentration, and further avoid the film layer of the display panel from being broken or damaged in the bending area.

[0052] The length of the groove 131 is less than or equal to the extension length of the bending area BA (ie, the length of the bending area BA in the bending area extension direction D3). Figure 4a , the length of the groove 131 is equal to the extension length of the bending area BA. In this case, the groove 131 runs through the left and right ends of the bending area BA. For example, the length of the groove 131 can also be less than the extension length of the bending area BA. Figure 4b As shown, one end of the groove 131 may be aligned with one side of the bending area BA, and the other end may be located in the bending area BA; or Figure 4c As shown, a plurality of discontinuous grooves 131 may be respectively disposed on the first organic layer 130 .

[0053] Understandably, Figure 4a, Figure 4b , Figure 4c The number, width, extension direction, etc. of the metal routing lines are only illustrative and should not be construed as limiting the present disclosure. In practical applications, the relevant parameters of the metal routing lines can be specifically set according to actual conditions.

[0054] In the disclosed embodiment, the shape or position of the groove can be designed according to actual conditions to improve the flexibility of the layout.

[0055] Figure 5a Shown Figure 3 A partial enlarged view of the display panel at the groove position is shown. Figure 4a , Figure 5a As shown, in some embodiments, in a cross section perpendicular to the groove extension direction D2, the cross-sectional shape of the groove 131 includes a trapezoid. The groove 131 includes a plurality of inner walls with different inclination directions, namely, a first side wall 1311, a bottom surface 1312, and a second side wall 1313. The length of the bottom surface 1312 is less than the line connecting the end positions of the first side wall 1311 and the second side wall 1313 that are away from the substrate, that is, the cross section of the groove 131 presents an inverted trapezoidal structure.

[0056] The metal layer 140 is arranged to fit the inner wall of the groove 131, so that the metal layer 140 bends along the curved path of the groove. Specifically, at the end position where the first side wall 1311 is away from the substrate, the extension direction of the metal layer 140 changes from a direction parallel to the substrate to extending toward the bottom surface 1312 along the inclined direction of the first side wall 1311, so as to form a first bending point P1 of the metal layer 140. Then, at the intersection of the first side wall 1311 and the bottom surface 1312, the extension direction of the metal layer 140 changes from the inclined direction of the first side wall 1311 to a direction parallel to the bottom surface 1312, so as to form a second bending point P2 of the metal layer 140. Then, at the intersection of the bottom surface 1312 and the second side wall 1313, the extension direction of the metal layer 140 changes from a direction parallel to the bottom surface 1312 to extending along the inclined direction of the second side wall 1313, so as to form a third bending point P3 of the metal layer 140. Finally, at the end of the second side wall 1313 away from the substrate, the extension direction of the metal layer 140 changes from the inclined direction of the second side wall 1313 to a direction parallel to the substrate, so as to form a fourth bending point P4 of the metal layer 140 .

[0057] The above four bending points of the metal layer 140 are connected to form a bending structure of the metal layer 140, and the position and shape of the bending structure correspond to the position and inner wall shape of the groove, respectively. At this time, the shape of the bending structure of the metal layer in the cross section is a concave structure that is wide at the top and narrow at the bottom. Since the extension direction of the metal layer 140 fits the inner wall of the groove 131, the specific bending angle of the metal layer 140, the length between each bending section, etc. can be limited by the inner wall shape of the groove 131 to achieve a precise bending design of the metal layer. At the same time, the geometric transition of the groove 131 helps the metal layer 140 maintain a uniform stress distribution during the bending process to avoid fracture or damage caused by stress concentration.

[0058] It can be understood that, in the case where the first organic layer 130 includes a plurality of grooves 131 , the bending structure of the metal layer 140 in other grooves 131 may refer to the bending structure in this embodiment.

[0059] In addition, the cross-sectional shape of the groove may also include a rectangle, a triangle, an arc, etc., or may also be an asymmetric shape, and the present disclosure does not impose any specific limitation on this.

[0060] For example, Figure 5b As shown, when the cross-sectional shape of the groove is a triangle, the groove includes a third side wall 1314 and a fourth side wall 1315. When the metal layer 140 is bent along the inner wall shape of the groove, bending points are formed at the end position P5 of the third side wall 1314 away from the substrate, the intersection position P6 of the third side wall 1314 and the fourth side wall 1315, and the end position P7 of the fourth side wall away from the substrate. These three bending points are connected to form a bending structure of the metal layer, and the position and shape of the bending structure correspond to the position and inner wall shape of the groove respectively. At this time, the bending structure of the metal layer is V-shaped in the cross section.

[0061] In some embodiments, continue to refer to Figure 4a The metal layer 140 includes metal traces. The metal traces are used to connect the display area AA and the non-display area NA to achieve electrical connection between the display area AA and the non-display area NA. Exemplarily, the non-display area NA includes a driver chip, and the metal traces are used to transmit the electrical signal of the driver chip to the display area AA, so that the driver chip controls the pixels in the display area AA to display images.

[0062] The extension direction of the metal wiring is parallel to the first direction D1, and the bending structure of the metal wiring is arranged along the first direction D1, so that Figure 4aIn the top view shown, the metal trace is an overall straight structure. It can be imagined that during the bending process of the bending area BA, the bending structure of the metal trace is stretched accordingly, and the length of the orthographic projection of the stretched metal trace on the substrate increases, which is longer than the orthographic projection of the metal trace in the unstretched state on the substrate. Therefore, during the bending process of the bending area BA, the bending structure of the metal trace can conform to the deformation along the bending area BA and undergo corresponding deformation. Through the deformation of the metal trace, the bending stress resistance of the metal trace can be improved, the risk of breakage of the metal trace can be reduced, and the yield of the display panel can be improved.

[0063] Rectangle reference Figure 4a The extension direction of the metal wiring intersects with the extension direction D2 of the groove. Therefore, within the groove range of the bending area, the metal wiring extends in accordance with the inner wall shape of the groove to present a bending structure in the groove.

[0064] In the top view of the display panel provided in the present disclosure, the shape of the groove is a rectangle, but it can be understood that the shape of the groove in the embodiment of the present disclosure is not limited to this, and it can be designed into a variety of different forms according to actual application requirements. For example, the groove can be designed to be in a zigzag shape, a wavy shape, etc. At this time, the extension direction of the metal wiring intersects with the extension direction of the groove, which can be understood as the extension direction of a partial section of the groove intersects with the extension direction of the metal wiring, and within the range of the partial section, the metal wiring can be bent along the inner wall of the groove to present a bent structure.

[0065] Optionally, the extension direction of the metal routing is perpendicular to the extension direction of the groove, so that the bending structures of the multiple metal routings maintain position alignment and shape consistency, so that during the bending process of the bending area BA, the deformation of the bending structures of the multiple metal routings remains consistent, thereby improving the overall reliability. In addition, such a layout can reduce the complexity of the design, making the layout of the metal routing and the included bending structures more intuitive.

[0066] Optionally, the metal layer 140 includes a plurality of metal traces, and the plurality of metal traces are spaced apart from each other. In some embodiments, some of the plurality of metal traces extend along the groove 131 to form a bent structure, and the remaining metal traces always extend on the flat surface of the first organic layer 130 where the groove is not provided, and do not form a bent structure. In other embodiments, each of the plurality of metal traces intersects the groove 131, that is, the plurality of metal traces extend along the surface of one side of the groove 131 away from the substrate 110, so that each metal trace presents a bent structure at the intersection with the groove 131.

[0067] A display panel provided by another embodiment of the present disclosure is introduced below. In this embodiment, the length of the metal layer in the first direction can be increased by providing a plurality of grooves, thereby improving the bending stress resistance of the metal layer.

[0068] Figure 6 FIG. 2 is a schematic diagram of a cross-sectional structure of a display panel provided by another embodiment of the present disclosure. Figure 6 As shown, in the bending area BA, there are multiple grooves 131. The metal layer 140 is bent along the inner wall surfaces of the multiple grooves 131 toward the substrate 110 to form multiple bending structures. The multiple bending structures are arranged at intervals along the first direction D1, and the positions and shapes of the multiple bending structures correspond to the positions and inner wall shapes of the multiple grooves 131.

[0069] It can be understood that in the cross section perpendicular to the extending direction of the groove (such as Figure 6 In the cross section shown in FIG. 1 , the cross-sectional shapes of the plurality of grooves 131 may be the same as each other, or may be different from each other, and the present disclosure does not impose any specific limitation on this. For example, the cross-sectional shapes of the plurality of grooves 131 may all be trapezoidal, or the cross-sectional shapes of the plurality of grooves 131 may be trapezoidal, triangular, etc.

[0070] Figure 7 Shown Figure 2 Another partial enlarged view of the display panel at the D area is shown. Figure 7 As shown, a plurality of grooves 131 are arranged at intervals along the first direction D1, that is, the portion of the organic layer 130 that is not etched into grooves is arranged alternately with the grooves 131. Correspondingly, a plurality of bending structures included in the metal layer 140 are arranged at intervals along the first direction D1. Since the bending structure of the metal layer 140 can improve the anti-bending stress of the metal layer 140 within the peripheral range, such a setting can improve the overall anti-bending stress of the bending area BA. During the bending process of the bending area BA, its bending position can be adjusted within the distribution range of the plurality of bending structures to improve the flexibility of the bending.

[0071] Optionally, the first direction D1 is perpendicular to the extension direction D3 of the bending zone, and such a layout can reduce the complexity of the design. In addition, during the bending process of the bending zone, the bending structure in the metal layer 140 is elongated along the deformation direction of the bending zone, so that the stress is more evenly distributed, reducing the risk of fracture of the metal layer 140 due to stress concentration during the bending process, and improving the reliability of the structure.

[0072] In some embodiments, continue to refer to Figure 7, the extension directions of the multiple grooves 131 are parallel to each other, and the spacing between adjacent grooves 131 is equal. In this way, it is helpful to more evenly disperse the stress applied to the first organic layer 130 in the bending area BA during the bending process. The metal layer 140 as a whole presents a wavy structure with equal spacing, so that during the bending process of the bending area BA, the tension on the metal layer 140 is evenly distributed to avoid stress concentration. Multiple bending structures are evenly arranged in the bending area BA, which can improve the overall reliability and resistance to bending stress, and improve the yield of the display panel.

[0073] Furthermore, for the metal layer 140 disposed thereon, the plurality of bending structures included in the metal layer 140 can maintain consistency in spacing and shape, thereby reducing design complexity.

[0074] In this embodiment, the metal layer 140 may include a plurality of metal traces distributed at intervals. There are bending structures at the intersections of the plurality of metal traces and the plurality of grooves. Figure 7 , multiple metal routings and multiple grooves are intertwined with each other, and the overall structure is a mesh; that is, the multiple bending structures included in the multiple metal routings are distributed in an array, which improves the overall reliability.

[0075] Understandably, Figure 7 The number, width, and extension direction of the metal traces or the number, width, and extension direction of the grooves are only exemplary and should not be construed as limiting the present disclosure. In practical applications, the relevant parameters of the metal traces or grooves can be specifically set according to actual conditions.

[0076] In some embodiments, the groove penetrates the first organic layer, and the metal layer contacts the portion of the substrate exposed in the groove. Figure 6 In the cross section shown, the depth of the groove 131 is consistent with the thickness of the first organic layer 130, and the bottom surface of the groove 131 coincides with the surface of the substrate 110 facing the first organic layer 130, that is, the shape of the portion of the substrate exposed by the groove 131 is consistent with the shape of the bottom surface of the groove 131, so as to present Figure 7 When the metal layer 140 is bent along the inner wall surface of the groove 131, the portion of the metal layer 140 extending along the bottom surface of the groove 131 contacts this portion of the substrate. In this way, the bending angle of the bending structure of the metal layer 140 can be increased as much as possible, and the length of the metal layer 140 in the first direction D1 can be increased within a limited space, so as to improve the anti-bending stress of the metal layer 140.

[0077] Furthermore, the first organic layer 130 on the substrate 110 is divided into strip structures that are not connected to each other by a plurality of grooves 131, and the extension direction of the strip structure is not parallel to the first direction D1. The divided strip structure is more susceptible to bending and deformation than the continuous planar structure, so the bending area BA in the embodiment of the present disclosure can be more easily bent to a larger angle, that is, the bending angle of the bending area BA is increased. At the same time, the bending structure of the metal layer 140 has a higher bending stress resistance, which can prevent the metal layer 140 from being damaged or broken during the bending process. That is, the embodiment of the present disclosure can increase the bending angle of the bending area BA and achieve a narrower lower frame design, while ensuring the effectiveness of the metal layer, and the display effect will not be affected.

[0078] Optionally, the substrate 110 includes a buffer layer 111, and the buffer layer 111 is located on a side of the substrate 110 facing the first organic layer 130. The groove 131 exposes a portion of the buffer layer 111, and when the metal layer 140 is bent along the inner wall surface of the groove 131, a portion of the metal layer 140 extending along the bottom surface of the groove 131 contacts the portion of the buffer layer 111 exposed by the groove 131. The buffer layer 111 can effectively release the mechanical stress that may be generated between the metal layer 140 and the substrate 110, thereby improving the reliability of the display panel.

[0079] Figure 8 FIG. 2 is a schematic diagram of a cross-sectional structure of a display panel provided by another embodiment of the present disclosure. Figure 8 As shown, in addition to the film structure described in the above embodiment, the display panel further includes a second organic layer 150. The second organic layer 150 is located on the side of the metal layer 140 away from the substrate 110. The second organic layer 150 covers the metal layer 140 and can protect the metal layer 140.

[0080] Optionally, the metal layer 140 is bent along the inner wall surface of the groove 131 toward the substrate 110, and a portion of the metal layer 140 in the groove 131 forms a metal groove structure, and a portion of the second organic layer 150 fills the metal groove structure. At this time, a portion of the second organic layer 150 covers the side of the metal layer 140 in the groove 131 that is away from the substrate 110.

[0081] Alternatively, when the metal layer 140 includes a metal wiring, in the groove 131, the metal wiring is bent along the inner wall surface of the groove 131 toward the direction close to the substrate 110, forming a bent structure of the metal wiring. At this time, part of the inner wall of the groove 131 is covered by the metal wiring. Part of the second organic layer 150 fills the groove 131, and in the groove 131, the side surface of the second organic layer 150 facing the substrate 110 is in contact with the metal layer 140 and the part of the first organic layer 130 not covered by the metal layer 140.

[0082] The second organic layer 150 can protect the metal layer 140 and can also play a planarization role, thereby improving the stability of the overall structure.

[0083] Optionally, the material of the second organic layer 150 includes an organic glue. The organic glue layer can serve as a protective layer for the metal layer to prevent the metal layer from being corroded by environmental factors such as humidity and oxygen, thereby extending the service life of the display panel. At the same time, the organic glue layer can also play a buffering and protective role, relieving the stress concentration caused by the bending process of the bending zone, thereby improving the stability of the overall structure of the display panel.

[0084] Optionally, continue to refer to Figure 3 The display panel further includes an inorganic layer 120 . The first organic layer 130 is located between the substrate 110 and the metal layer 140 . The inorganic layer 120 is located on a surface of the substrate 110 close to the metal layer 140 .

[0085] The inorganic layer 120 may include an encapsulation layer, an insulating layer, an interlayer dielectric layer, and other structures. Since the structure of the inorganic layer 120 is easily broken by bending stress, the inorganic layer 120 at the bending area BA is removed in advance during the preparation of the display panel. Therefore, in the display area AA, the first organic layer 130 is located between the metal layer 140 and the inorganic layer 120, and in the bending area BA, the first organic layer 130 is directly located between the metal layer 140 and the substrate 110.

[0086] Fig. 9 Shown Figure 1 A top view of the display panel is shown. Figure 1 The film layer structure of the display panel in the related art shown in FIG. Figure 7 The film layer structure of the display panel provided by the embodiment of the present disclosure is shown. It can be found that the film layer structure of the display panel provided by the embodiment of the present disclosure is similar to the film layer structure of the display panel in the related art, and the difference is that the first organic layer in the embodiment of the present disclosure includes a plurality of grooves. Therefore, in the preparation process of the two, the only difference is that in the preparation process of the display panel provided by the embodiment of the present disclosure, the first organic layer needs to be patterned during the etching process of the first organic layer. In the preparation process of the display panel in the related art, only the first organic layer needs to be simply etched, and no patterning is required.

[0087] It can be seen that the manufacturing process of the display panel of the embodiment of the present disclosure is consistent with the manufacturing process of a conventional display panel, and there is no need to introduce a new process and film layer structure, which can effectively control the production cost.

[0088] It is understandable that the film structure of the display panel in the above embodiment is only schematic, and those skilled in the art can set or adjust the film structure in the display panel according to actual needs. For example, the display panel also includes a pixel definition layer located on the surface of the second organic layer away from the substrate.

[0089] Based on the same inventive concept, the present disclosure also provides a display device, including the display panel provided in the above-mentioned embodiment of the present disclosure. The display device may include a device with a display function, such as a television and a monitor. In the embodiment of the present disclosure, the display device may also be used in an electronic device, and the electronic device may include a mobile phone, a tablet computer, a smart wearable device, a laptop computer, etc. The present disclosure does not specifically limit the specific form of the display device.

[0090] Since the principle of solving the problem in the display device embodiment is similar to that in the above-mentioned display panel embodiment, the implementation of the display device embodiment may refer to the implementation of the above-mentioned display panel embodiment, and the repeated parts will not be repeated.

[0091] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A display panel, characterized in that: Comprising a display area and a bending area arranged adjacent to each other, the display panel comprises: substrate; A first organic layer is located on one side of the substrate, and in the bending region, at least one groove is provided on a side of the first organic layer facing away from the substrate; a metal layer, located on a side of the first organic layer facing away from the substrate; Wherein, in the bending area, at least part of the metal layer extends along a first direction intersecting with an extension direction of the bending area, and extends on a side of the groove away from the substrate, and the extension direction of the groove intersects with the first direction.

2. The display panel according to claim 1, characterized in that: The metal layer extends along the surface of the first organic layer facing away from the substrate, and a portion of the metal layer located in the groove presents a bent structure; Preferably, the metal layer extends along a surface of a side of the inner wall of the groove facing away from the substrate; Preferably, the material of the first organic layer includes organic glue.

3. The display panel according to claim 1, characterized in that: An extension direction of the groove is perpendicular to the first direction, and a length of the groove is less than or equal to an extension length of the bending zone.

4. The display panel according to claim 1, characterized in that: There are multiple grooves, and the multiple grooves are arranged at intervals along the first direction; Preferably, the first direction is perpendicular to the extending direction of the bending area.

5. The display panel according to claim 2, characterized in that: The distances between adjacent grooves are equal.

6. The display panel according to claim 1, characterized in that: The metal layer includes a metal wiring, and an extension direction of the metal wiring intersects with an extension direction of the groove; Preferably, the extension direction of the metal wiring is perpendicular to the extension direction of the groove; Preferably, there are a plurality of metal wirings, and the plurality of metal wirings extend along a surface of the groove that is away from the substrate.

7. The display panel according to claim 1, characterized in that: In a cross section perpendicular to an extending direction of the groove, a cross-sectional shape of the groove includes a trapezoid.

8. The display panel according to claim 1, characterized in that: The groove penetrates the first organic layer, and the metal layer contacts the portion of the substrate exposed in the groove; Preferably, the substrate comprises a buffer layer, the groove exposes a portion of the buffer layer, and the metal layer is in contact with the portion of the buffer layer.

9. The display panel according to claim 1, characterized in that: Also comprising a second organic layer, located on a side of the metal layer facing away from the substrate; Preferably, part of the second organic layer fills the groove, and / or part of the second organic layer covers a side of the metal layer in the groove facing away from the substrate; Preferably, the material of the second organic layer includes organic glue; Preferably, in the display area, the display panel further includes an inorganic layer, and the inorganic layer is located between the substrate and the first organic layer.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 9.

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