Display panel and manufacturing method therefor, and display apparatus

Abstract

A display panel and a manufacturing method therefor, and a display apparatus. The display panel (1000) is formed by means of splicing a plurality of display sub-panels (100), wherein each display sub-panel (100) among the plurality of display sub-panels (100) has a first display surface (140), the display sub-panel (100) has a first frame (110) and a second frame (120), the first frame (110) and the second frame (120) are bent towards the side that is away from the first display surface (140), and the first frame (110) of at least one display sub-panel (100) among the plurality of display sub-panels (100) is provided to come into contact with the second frame (120) of a display sub-panel (100) adjacent to the display sub-panel (100).

Description

Display panel, manufacturing method thereof, and display device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on June 15, 2023, with application number 202310716024.6 and titled “Display panel, manufacturing method thereof and display device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present disclosure relates to the field of display technology, and in particular, to a display panel, a manufacturing method thereof, and a display device. Background Art

[0004] Display devices formed by splicing multiple display screens usually have obvious splicing seams, which affects the user experience.

[0005] Overview

[0006] In one aspect, the present disclosure provides a display panel. According to some embodiments of the present disclosure, the display panel is composed of a plurality of sub-display panels spliced ​​together; each of the plurality of sub-display panels has a first display surface, and the sub-display panel has a first frame and a second frame, the first frame and the second frame being bent away from the first display surface, and the first frame of at least one of the plurality of sub-display panels being arranged in contact with the second frame of an adjacent sub-display panel.

[0007] According to an embodiment of the present disclosure, the sub-display panel has a plurality of hollow areas.

[0008] According to an embodiment of the present disclosure, the sub-display panel includes multiple pixel island areas and multiple connecting bridge areas, the hollow area is located between the pixel island area and the connecting bridge area, the connecting bridge area connects two adjacent pixel island areas, and the connecting bridge area includes wiring.

[0009] According to an embodiment of the present disclosure, the sub-display panel includes a substrate, a first flat layer and a first passivation layer, the substrate and the first flat layer are located in the pixel island area and the connecting bridge area, and the first passivation layer is located in the pixel island area; the first flat layer is located on one side of the substrate, the first flat layer has a groove, the cross-section of the groove along a first direction is an inverted trapezoid, and the first direction is the direction from the substrate to the first flat layer; and the first passivation layer covers a portion of the surface of the first flat layer away from the substrate, the first passivation layer has a first opening, and the orthographic projection of the first opening on the substrate falls within the orthographic projection range of the edge of the groove away from the substrate on the substrate.

[0010] According to an embodiment of the present disclosure, the sub-display panel also includes a second passivation layer, which is located in the pixel island area, and the second passivation layer covers the surface of the first passivation layer away from the substrate, the bottom of the groove and at least part of the side wall of the groove, the second passivation layer has a second opening, and the area of ​​the orthographic projection of the part of the second passivation layer located at the bottom of the groove on the substrate is larger than the area of ​​the orthographic projection of the second opening on the substrate, and the orthographic projection of the part of the second passivation layer located at the bottom of the groove on the substrate covers the orthographic projection of the second opening on the substrate.

[0011] According to an embodiment of the present disclosure, the sub-display panel further includes a pixel defining layer, an anode, a light-emitting layer and a cathode, the pixel defining layer, the anode and the cathode are located in the pixel island area, the pixel island area includes at least one pixel, the anode covers the portion of the surface of the second passivation layer away from the substrate, the pixel defining layer defines a plurality of third openings, the pixel defining layer covers the portion of the surface of the anode away from the substrate, the light-emitting layer fills at least a portion of the third openings, the cathode is located on the side of the light-emitting layer away from the substrate, the cathode covers the portion of the surface of the pixel defining layer away from the substrate, and the orthographic projection of the cathode on the substrate has no overlapping area with the orthographic projection of the groove on the substrate.

[0012] According to an embodiment of the present disclosure, the sub-display panel has a first bending portion, the first bending portion includes a flexible circuit board and an integrated circuit, and the first bending portion bends toward a side away from the first display surface.

[0013] According to an embodiment of the present disclosure, the first bending portion includes a stretchable transition zone, which is located between the first display surface and the flexible circuit board. The stretchable transition zone has a first edge and a second edge, the first edge partially coincides with the edge of the first display surface, and the second edge at least partially coincides with the edge of the flexible circuit board.

[0014] According to an embodiment of the present disclosure, the distance between the first side and the second side is greater than or equal to 1 mm.

[0015] According to an embodiment of the present disclosure, the sub-display panel is fan-shaped, and the display panel is spherical or a part of a sphere.

[0016] According to an embodiment of the present disclosure, the display panel is a part of a sphere, and the number of the sub-display panels in the display panel is any value between 2 and 10; or, the display panel is a part of a sphere, and the number of the sub-display panels in the display panel is any value between 8 and 20.

[0017] According to an embodiment of the present disclosure, the at least one sub-display panel further has a third frame, the third frame is located at one end of the sub-display panel, and the third frame is bent toward a side away from the first display surface.

[0018] According to an embodiment of the present disclosure, the display surface of the display panel is a rectangular plane or an irregular plane, and the third frame of at least one sub-display panel is arranged in contact with the third frame or the first bending portion of another sub-display panel; or, the display panel has six display surfaces, and the six display surfaces of the display panel constitute the six surfaces of a rectangular parallelepiped; or, the display panel has four display surfaces, and the four display surfaces of the display panel are connected in sequence to constitute the four side surfaces of a rectangular parallelepiped.

[0019] In another aspect of the present disclosure, a method for manufacturing the aforementioned display panel is provided. According to an embodiment of the present disclosure, the method for manufacturing the aforementioned display panel includes: providing a plurality of original sub-display panels; bending the first and second frames of each of the plurality of original sub-display panels toward a side away from the display surface of the original sub-display panel to form a sub-display panel; and bringing the first frame of the sub-display panel into contact with the second frame of another sub-display panel, thereby splicing the plurality of sub-display panels to form a display panel.

[0020] According to an embodiment of the present disclosure, the original sub-display panel is fan-shaped, and the side of the original sub-display panel facing away from the display surface is attached to the mold, so that the first frame and the second frame of the original sub-display panel are bent toward the side of the display surface away from the original sub-display panel to obtain the sub-display panel, wherein the mold is a sphere or a part of a sphere; the first frame of one sub-display panel is brought into contact with the second frame of another sub-display panel, and the operation is repeated so that multiple sub-display panels are spliced ​​to form a spherical display panel or a part of a spherical display panel; or, splicing multiple sub-display panels to form a display panel also includes: bending the third frame of the original sub-display panel toward the side of the display surface away from the original sub-display panel; or, splicing multiple sub-display panels to form a display panel also includes: setting the third frame of the sub-display panel in contact with the third frame or the first bending portion of another sub-display panel.

[0021] According to an embodiment of the present disclosure, manufacturing the original sub-display panel includes: providing an original substrate, wherein the original substrate includes a first preset area, a second preset area, and a third preset area; forming an original first flat layer on one side of the original substrate, and removing the original first flat layer of the second preset area; forming an original first passivation layer on a side of the original first flat layer away from the original substrate, and removing the original first passivation layer of the second preset area and the third preset area, using gas to etch the original first passivation layer and the original first flat layer of the first preset area to obtain a first flat layer, and forming a first opening in the original first passivation layer, wherein the first flat layer has a groove, and the cross-section of the groove along the first direction is an inverted trapezoid, and the first direction is the direction from the original substrate to the first flat layer; and the orthographic projection of the first opening on the original substrate falls within the orthographic projection range of the edge of the groove away from the original substrate on the original substrate.

[0022] According to an embodiment of the present disclosure, the production of the original sub-display panel also includes: forming an original second passivation layer on a side of the original first passivation layer away from the original substrate, the original second passivation layer covering the surface of the original first passivation layer away from the original substrate, the bottom of the groove and at least part of the side wall of the groove, the original second passivation layer having a second opening, the area of ​​the orthographic projection of the portion of the original second passivation layer located at the bottom of the groove on the original substrate is larger than the area of ​​the orthographic projection of the second opening on the original substrate, and the orthographic projection of the portion of the second passivation layer located at the bottom of the groove on the original substrate covers the orthographic projection of the second opening on the original substrate; exposing and etching the original second passivation layer and the original first passivation layer to form a first via hole, thereby obtaining a second passivation layer and a first passivation layer; forming a plurality of light-emitting units in the first preset area; and removing the original substrate of the second preset area to form a hollow area.

[0023] In another aspect of the present disclosure, a method for manufacturing a display panel is provided. According to an embodiment of the present disclosure, the method for manufacturing a display panel includes: calculating a pixel pitch based on the width of a fourth frame, the width of a fifth frame, and a fitting tolerance of a sub-display panel; manufacturing a plurality of sub-display panels, wherein the spacing between two adjacent pixels in the sub-display panels is the pixel pitch, and the sub-display panels have a fourth frame and a fifth frame; and splicing the plurality of sub-display panels to form a display panel, wherein the fourth frame of at least one of the plurality of sub-display panels is arranged in contact with the fifth frame of a sub-display panel adjacent to the sub-display panel.

[0024] In another aspect of the present disclosure, a display device is provided. According to an embodiment of the present disclosure, the display device includes the display panel described above or a display panel manufactured using the method described above. Thus, the display device has a good display effect.

[0025] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below.

[0026] BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] FIG1 shows a partial structural schematic diagram of a display panel according to an embodiment of the present disclosure;

[0029] FIG2 shows a schematic structural diagram of a display panel according to another embodiment of the present disclosure;

[0030] FIG3 shows a schematic structural diagram of a display panel according to yet another embodiment of the present disclosure;

[0031] FIG4 shows a schematic structural diagram of a display panel according to yet another embodiment of the present disclosure;

[0032] FIG5 shows a schematic structural diagram of a display panel according to yet another embodiment of the present disclosure;

[0033] FIG6 shows a schematic structural diagram of a display panel according to yet another embodiment of the present disclosure;

[0034] FIG7 shows a schematic structural diagram of a display panel according to yet another embodiment of the present disclosure;

[0035] FIG8 shows a schematic structural diagram of a display panel according to yet another embodiment of the present disclosure;

[0036] FIG9 shows a schematic structural diagram of a display panel according to yet another embodiment of the present disclosure;

[0037] FIG10 shows a schematic structural diagram of a sub-display panel according to an embodiment of the present disclosure;

[0038] FIG11 shows a schematic structural diagram of a sub-display panel according to another embodiment of the present disclosure;

[0039] FIG12 shows a schematic structural diagram of a sub-display panel according to yet another embodiment of the present disclosure;

[0040] FIG13 shows a schematic diagram of a partial structure of a sub-display panel according to an embodiment of the present disclosure;

[0041] FIG14 shows a partial structural schematic diagram of a sub-display panel according to another embodiment of the present disclosure;

[0042] FIG15 shows a partial structural diagram of a sub-display panel according to another embodiment of the present disclosure;

[0043] FIG16 shows a partial structural schematic diagram of a sub-display panel according to yet another embodiment of the present disclosure;

[0044] FIG17 shows a partial structural schematic diagram of a sub-display panel according to yet another embodiment of the present disclosure;

[0045] FIG18 shows a partial structural schematic diagram of a display panel according to an embodiment of the present disclosure;

[0046] FIG19 shows a partial structural schematic diagram of a display panel according to an embodiment of the present disclosure;

[0047] FIG20 shows a partial structural schematic diagram of a display panel according to an embodiment of the present disclosure;

[0048] FIG21 shows a partial structural schematic diagram of a display panel according to an embodiment of the present disclosure;

[0049] FIG22 shows a flow chart of a portion of a method for manufacturing a display panel according to an embodiment of the present disclosure;

[0050] FIG23 shows a flow chart of a portion of a method for manufacturing a display panel according to an embodiment of the present disclosure;

[0051] FIG24 shows a flow chart of a portion of a method for manufacturing a display panel according to an embodiment of the present disclosure;

[0052] FIG25 shows a schematic structural diagram of a sub-display panel according to an embodiment of the present disclosure;

[0053] FIG26 shows a schematic structural diagram of a sub-display panel according to another embodiment of the present disclosure;

[0054] FIG27 shows a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

[0055] FIG28 shows a schematic structural diagram of a display panel according to another embodiment of the present disclosure;

[0056] FIG29 is a schematic diagram showing a process of a method for manufacturing a display panel according to an embodiment of the present disclosure; and

[0057] FIG30 is a schematic flow chart showing a method for manufacturing a display panel according to another embodiment of the present disclosure.

[0058] Detailed description

[0059] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0060] The following embodiments of the present disclosure are described in detail. The following embodiments are illustrative and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in the art or in the product specifications shall be followed.

[0061] Conventional flexible displays cannot directly form non-planar screens with biaxial curvature, particularly spherical displays. This is because the area of ​​a flat display changes significantly when it is transformed into a spherical display. Flexible displays use a high-temperature resistant plastic substrate, which itself does not have significant reversible deformation and is difficult to directly stretch into a spherical structure. There are two main approaches to forming spherical displays: the first is to use chip-driven light-emitting diode (LED) lamp beads, directly mounted on a flexible substrate, and then slightly stretched and deformed before splicing. The resulting display has low resolution and is bulky, making it suitable for long-distance viewing in ultra-large venues such as large exhibition centers. The second approach is to use a stretchable display, which is stretched to form a spherical curved screen. This display has a better resolution than chip-driven LED displays. Stretchable displays can be made by opening holes in a high-temperature resistant plastic substrate. The presence of holes reduces the display's resolution, and directly attaching the stretchable display to a spherical surface will further significantly reduce the resolution. Moreover, to form a closed spherical screen, at least two hemispheres are required, leaving a noticeable gap between the two hemispheres, affecting the display effect. In addition, a display device formed by splicing flat screens to form a large flat surface or multiple flat surfaces is also prone to splicing seams, which affects the user's viewing experience.

[0062] Because the seams are caused by the display's frame and the fitting tolerance, bending the frame away from the display surface so that the frames of two adjacent displays touch can, at least to some extent, alleviate or even resolve the technical issue of seams in displays. This method can be used to splice multiple displays into various shapes, such as spherical screens, rectangular displays, and large-sized flat screens. Furthermore, the pixel pitch can be calculated based on the display's frame width and fitting tolerance. When manufacturing the display, the pixels are manufactured according to this calculated pixel pitch. This way, a display produced by directly splicing the frames of multiple displays is also less likely to have seams when displaying images.

[0063] In one aspect, the present disclosure provides a display panel. According to an embodiment of the present disclosure, with reference to Figures 1 to 9, a display panel 1000 can be composed of a plurality of sub-display panels 100 spliced ​​together, wherein each sub-display panel 100 in the plurality of sub-display panels has a first display surface 140, a first frame 110 and a second frame 120, the first frame 110 and the second frame 120 being bent toward a side away from the first display surface 140, and the first frame 110 of at least one sub-display panel 100 in the plurality of sub-display panels being arranged in contact with the second frame 120 of the sub-display panel 100 adjacent to the sub-display panel 100. Thus, by placing the first and second frames of adjacent sub-display panels in contact, the pixel density at the splicing point of the adjacent sub-display panels can be substantially consistent with the pixel density of a single sub-display panel, thereby making it difficult for viewers to observe the splicing seam when displaying an image, and the display panel has a better display effect. It should be noted that the first display surface 140 is the light-emitting surface of the sub-display panel 100.

[0064] According to some embodiments of the present disclosure, referring to FIG1 , the first frame 110 and the second frame 120 can be bent 90° in a direction away from the first display surface 140, and the first frame 110 of one sub-display panel and the second frame 120 of another sub-display panel are arranged in contact with each other. As a result, the portions of the first frame and the second frame where no pixels are arranged are not in the same plane as the first display surface, and the spacing between the pixels at the edges of the first display surfaces of two adjacent sub-display panels is substantially consistent with the pixel spacing in a single sub-display panel, so that the display panels obtained by splicing do not have obvious splicing seams, which is beneficial to improving the display effect of the display panel and thus providing a better experience for the viewer. It should be noted that, in order to clearly illustrate the situation of the two adjacent sub-display panels, FIG1 only shows two sub-display panels in the display panel; in addition, the pixels 150 in FIG1 are shown in a raised form only to illustrate that the corresponding area is provided with a pixel structure.

[0065] It should be noted that the first and second bezels may include a gate driver on array (GOA) circuit and a non-display area disposed on the array substrate. Furthermore, it should be noted that the first and second bezels may be bent at angles other than 90° toward the side away from the first display surface, as long as the bezels of two adjacent sub-display panels can be arranged in contact.

[0066] According to an embodiment of the present disclosure, referring to FIG. 2 to FIG. 9 , a plurality of sub-display panels may be spliced ​​together to form display panels of different shapes.

[0067] According to some embodiments of the present disclosure, referring to Figures 2 to 4, 10, and 11, the sub-display panel 100 may be fan-shaped, and the display panel 1000 may be spherical or a portion of a sphere. Specifically, referring to Figure 2, the display panel may be spherical; referring to Figure 3, the display panel may be hemispherical; and referring to Figure 4, the display panel may be a portion of a hemispherical.

[0068] According to some embodiments of the present disclosure, the display panel 1000 may be a portion of a sphere, and the number of sub-display panels 100 in the display panel 1000 may be any value between 2 and 10. For example, the display panel 1000 may be composed of 2, 4, 5, 6, 8, or 10 sub-display panels 100. In a display panel composed of the aforementioned number of sub-display panels to form a portion of a sphere, the sub-display panels require less stretching, and after stretching, a higher resolution can be maintained, which helps to improve the display effect of the display panel.

[0069] According to some embodiments of the present disclosure, the display panel 1000 may be spherical, and the number of sub-display panels 100 in the display panel may be any value between 8 and 20. For example, the display panel 1000 may be composed of 8, 10, 12, 16, or 20 sub-display panels 100. When the number of sub-display panels is within the above range, the sub-display panels can be spliced ​​together to form a spherical display panel within a certain practical stretching range. Compared to directly stretching a single display screen into a spherical shape, a spherical display panel composed of sub-display panels within the above range can maintain a higher resolution, thereby providing a better display effect.

[0070] According to some embodiments of the present disclosure, referring to FIG1 , FIG11 (to facilitate illustrating the structure of the sub-display panel, FIG11 shows the structure of the sub-display panel before being bent, and FIG10 shows the structure after being bent), and FIG12 , the sub-display panel 100 may further include a first bending portion 130. The first bending portion 130 includes a flexible circuit board 131 and an integrated circuit 132. The first bending portion 130 bends toward a side away from the first display surface 140. Neither the flexible circuit board nor the integrated circuit has a display function. Bending the flexible circuit board and the integrated circuit away from the first display surface can improve the utilization of the display surface, thereby facilitating an enhanced display effect of the display panel.

[0071] According to other embodiments of the present disclosure, referring to Figures 1, 11, and 12, the first bending portion 130 may further include a stretchable transition zone 133. The stretchable transition zone 133 is located between the first display surface and the flexible circuit board 131. The stretchable transition zone 133 has a first side 133' and a second side 133". The first side 133' partially overlaps with the edge of the first display surface 140, and the second side 133" at least partially overlaps with the edge of the flexible circuit board 131. The flexible circuit board and the integrated circuit have poor stretchability, while the stretchable transition zone has good stretchability. Therefore, the stretchable transition zone can be bent to achieve the purpose of bending the flexible circuit board and the integrated circuit to the side away from the first display surface.

[0072] According to some embodiments of the present disclosure, referring to Figures 11 and 12, the spacing d between the first side 133' and the second side 133" may be greater than or equal to 1 mm. For example, the spacing between the first side 133' and the second side 133" may be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc. Setting the spacing between the first side 133' and the second side 133" to be greater than or equal to 1 mm can facilitate bending of the first bending portion toward a side away from the first display surface, thereby avoiding damage to the flexible printed circuit board or the integrated circuit during the bending process.

[0073] According to other embodiments of the present disclosure, referring to Figures 1 and 12 , at least one sub-display panel 100 in the display panel may further include a third frame 160. The third frame 160 may be located at one end of the sub-display panel 100 and bend toward a side away from the first display surface 140. According to some embodiments of the present disclosure, referring to Figure 12 , the sub-display panel 100 may be rectangular. Rectangular sub-display panels may be assembled to form a larger flat display panel or a display panel having multiple display surfaces.

[0074] According to some embodiments of the present disclosure, referring to FIG. 5 to FIG. 7 , a plurality of rectangular sub-display panels 100 may be spliced ​​together to form a rectangular flat display panel (as shown in FIG. 5 and FIG. 7 ) or a special-shaped flat display panel (as shown in FIG. 6 ).

[0075] According to some embodiments of the present disclosure, referring to FIG. 5 , the display surface of the display panel 1000 may be a rectangular plane, and the third frame 160 of at least one sub-display panel 100 is arranged in contact with the third frame 160 or the first bending portion 130 of another sub-display panel 100 .

[0076] According to other embodiments of the present disclosure, referring to FIG7 , the display panel 1000 can be obtained by splicing together a plurality of rectangular sub-display panels 100, wherein the plurality of sub-display panels are arranged in a row in sequence, the width of the display panel 1000 is equal to the length of the sub-display panel, and the length of the display panel is equal to the sum of the lengths of the plurality of sub-display panels.

[0077] According to some other embodiments of the present disclosure, referring to FIG. 6 , the display surface of the display panel 1000 may be an irregular plane, and the third frame 160 of at least one sub-display panel 100 may be arranged in contact with the third frame 160 or the first bending portion 130 of another sub-display panel 100 .

[0078] According to an embodiment of the present disclosure, referring to FIG. 8 and FIG. 9 , a plurality of sub-display panels may be spliced ​​together to form a display panel having a plurality of planar display surfaces.

[0079] According to some embodiments of the present disclosure, with reference to FIG8 , the display panel 1000 may have six display surfaces, and the six display surfaces of the display panel constitute the six surfaces of a rectangular parallelepiped, that is, the display panel may be a rectangular parallelepiped structure. According to other embodiments of the present disclosure, with reference to FIG9 , the display panel 1000 may have four display surfaces, and the four display surfaces of the display panel 1000 are connected in sequence to constitute the four sides of a rectangular parallelepiped, and the display panel may be a hollow structure. Optionally, a plurality of sub-display panels may also be spliced ​​to form three-dimensional structures of other shapes, for example, a triangular prism with a hollow structure, a prism with five sides, an annular structure (the inner and outer surfaces of the annular structure can both display images), and the like. It should be noted that each planar display surface of the display panel in FIG8 and FIG9 may also be formed by splicing a plurality of sub-display panels.

[0080] According to some embodiments of the present disclosure, referring to Figures 13 and 14 , the sub-display panel 100 may have multiple hollow areas B. By providing multiple hollow areas, the sub-display panel can have better stretchability and can withstand a certain degree of deformation, thereby being more conducive to forming display panels of different shapes through splicing, such as display panels with curved surfaces; that is, the sub-display panel has a large stretchable deformation and can be stretched to form a spherical or curved surface structure.

[0081] According to some embodiments of the present disclosure, referring to Figures 13 and 14 , the sub-display panel 100 may include a plurality of pixel islands A and a plurality of connecting bridges C, with the hollow region B located between the pixel islands A and the connecting bridges C. The connecting bridges C connect two adjacent pixel islands A, and the connecting bridges C may include wiring (referring to Figure 15 , the connecting bridges C may include a first wiring 71 and a second wiring 81 ). This can further improve the stretchability of the sub-display panel, thereby facilitating the formation of a curved display panel using the sub-display panels and further improving the overall performance of the display panel. The wiring in the connecting bridges can be connected to the pixel structures in the pixel islands, thereby providing voltage signals to the pixels.

[0082] According to some embodiments of the present disclosure, referring to Figures 15 to 17, the sub-display panel 100 may include a substrate 10, a first flat layer 20, a first passivation layer 30, a second passivation layer 40, a pixel defining layer 50, an anode 151', a light-emitting layer 151" and a cathode 151'", wherein the anode 151', the light-emitting layer 151" and the cathode 151'" constitute a light-emitting unit. Referring to Figure 15, the substrate 10 and the first flat layer 20 are located in the pixel island area A and the connecting bridge area C, and the first passivation layer 30, the second passivation layer 40, the pixel defining layer 50, the anode 151', the light-emitting layer 151" and the cathode 151'" are located in the pixel island area A.

[0083] According to an embodiment of the present disclosure, referring to Figures 15 to 17 , a first planar layer 20 is located on one side of a substrate 10. The first planar layer 20 has a groove 21. The cross-section of the groove 21 along a first direction is an inverted trapezoid. The first direction (i.e., the Y direction shown in Figures 15 to 17 ) is the direction from the substrate 10 toward the first planar layer 20. The orthographic projection of the bottom of the groove 21 on the substrate 10 falls within the orthographic projection of the edge of the groove 21 away from the substrate 10. That is, the dimension of the groove 21 on the side close to the substrate 10 is smaller than the dimension of the groove 21 away from the substrate 10. A first passivation layer 30 covers a portion of the surface of the first planar layer 20 away from the substrate 10. The first passivation layer 30 has a first opening 31. The orthographic projection of the first opening 31 on the substrate 10 falls within the orthographic projection of the edge of the groove 21 away from the substrate 10. That is, the dimension of the first opening 31 is smaller than the dimension of the groove 21 away from the substrate 10. Thus, the first flat layer and the first passivation layer form an undercut structure at the groove, which can at least to a certain extent prevent the cathode material from entering under the "brim" of the first passivation layer when depositing the cathode material, thereby helping to improve the overall stability of the display panel and further help to extend the service life of the display panel.

[0084] According to some embodiments of the present disclosure, referring to Figures 15 and 17 , a second passivation layer 40 covers the surface of the first passivation layer 30 distal from the substrate 10, the bottom of the groove 21, and at least a portion of the sidewalls of the groove 21. The second passivation layer 40 has a second opening 41. The orthographic projection of the portion of the second passivation layer 40 located at the bottom of the groove 21 onto the substrate 10 is larger than the orthographic projection of the second opening 41 onto the substrate 10. Furthermore, the orthographic projection of the portion of the second passivation layer 40 located at the bottom of the groove 21 onto the substrate 10 covers the orthographic projection of the second opening 41 onto the substrate 10. Specifically, referring to Figure 17 , the cross-sectional dimension D2 of the portion of the second passivation layer 40 located at the bottom of the groove 21 is larger than the cross-sectional dimension D1 of the second opening 41. Thus, the structure formed by the second passivation layer and the first passivation layer in the groove can further prevent the cathode material from entering under the "brim" of the first passivation layer during deposition, thereby further improving the stability of the display panel and extending the service life of the display panel.

[0085] According to some embodiments of the present disclosure, the pixel island region A may include at least one pixel 150. Referring to FIG13 , each pixel island region A includes one pixel 150. As shown in the dotted box in FIG13 , each pixel 150 may be composed of three sub-pixels 151. Specifically, each pixel 150 may include one blue sub-pixel, one red sub-pixel, and one green sub-pixel. 15 , 17 , and 22 , the anode 151 ′ covers a portion of the surface of the second passivation layer 40 away from the substrate 10. The pixel-defining layer 50 defines a plurality of third openings 51 (only one third opening 51 is shown in FIG22 ). The pixel-defining layer 50 covers a portion of the surface of the anode 151 ′ away from the substrate 10. The light-emitting layer 151 ″ fills at least a portion of the third opening 51. The cathode 151 ′″ is located on a side of the light-emitting layer 151 ′″ away from the substrate 10. The cathode 151 ′″ covers a portion of the surface of the pixel-defining layer 50 away from the substrate 10. Furthermore, the orthographic projection of the cathode 151 ′″ on the substrate 10 has no overlapping area with the orthographic projection of the groove 21 on the substrate 10. This helps to further improve the overall stability of the display panel and extend the service life of the display panel.

[0086] According to an embodiment of the present disclosure, referring to Figures 15 and 17 , the sub-display panel may further include an encapsulation layer 60, which may be a thin film encapsulation structure. Specifically, the encapsulation layer 60 may include a first inorganic encapsulation film layer 61, an organic encapsulation film layer 62, and a second inorganic encapsulation film layer 63. The bridge region C may include only the first and second inorganic encapsulation film layers 61 and 63. 15 , in the pixel island region A, the first inorganic encapsulation film layer 61 covers at least a portion of the surface of the cathode 151″ away from the substrate 10 and a portion of the surface of the second passivation layer 40 away from the substrate 10; the organic encapsulation film layer 62 covers the surface of the first inorganic encapsulation film layer 61 away from the substrate 10 and a portion of the surface of the second passivation layer 40 away from the substrate 10, and the organic encapsulation film layer 62 fills at least a portion of the second opening 41; the second inorganic encapsulation film layer 63 covers at least a portion of the surface of the organic encapsulation film layer 62 away from the substrate 10 and a portion of the surface of the first inorganic encapsulation film layer 61 away from the substrate 10. The encapsulation layer can prevent external water and oxygen from invading the light-emitting layer and the cathode, thereby further improving the stability of the display panel and helping to further extend the service life of the display panel.

[0087] According to some embodiments of the present disclosure, referring to Figure 15, the pixel island area A of the sub-display panel may also include a blocking layer 1, a buffer layer 2, an active layer 3, a first gate insulation layer 4, a first gate layer 5, a second gate insulation layer 6, a second gate layer 7, a first source and drain electrode layer 70, an interlayer dielectric layer 8 and a second planarization layer 90. In which, the substrate 10, the barrier layer 1 and the buffer layer 2 are stacked in sequence, the active layer 3 covers the portion of the surface of the buffer layer 2 away from the substrate 10; the first gate insulating layer 4 covers the portion of the surface of the buffer layer 2 away from the substrate 10 and the portion of the surface of the active layer 3 away from the substrate 10; the first gate layer 5 covers the portion of the surface of the first gate insulating layer 4 away from the substrate 10, and the first gate layer 5 may include a first gate and a wiring structure arranged in the same layer as the first gate, and the orthographic projection of the first gate on the substrate 10 covers the portion of the surface of the orthographic projection of the active layer 3 on the substrate 10; the second gate insulating layer 6 covers at least a portion of the surface of the first gate layer 5 away from the substrate 10 and the portion of the surface of the first gate insulating layer 4 away from the substrate 10; the second gate layer 7 covers the portion of the surface of the second gate insulating layer 6 away from the substrate 10; the interlayer dielectric layer 8 covers the portion of the surface of the second gate insulating layer 6 away from the substrate 10 and at least a portion of the surface of the second gate layer 7 away from the substrate 10; the first source and drain electrode layer 70 covers the portion of the surface of the interlayer dielectric layer 8 away from the substrate 10, and the first source and drain electrode layer 70 passes through the interlayer dielectric layer 8 and the second gate insulating layer 6 and contacts the active layer 3. 15 to 17 , the second planarizing layer 90 covers at least a portion of the surface of the first source-drain electrode layer 70 away from the substrate 10, the second source-drain electrode layer 80 covers a portion of the surface of the second planarizing layer 90 away from the substrate 10, and the second source-drain electrode layer 80 contacts the first source-drain electrode layer 70 through a via, and the anode 151 ′ contacts the second source-drain electrode layer 80 through a first via 9; the first planarizing layer 20 covers a portion of the surface of the second planarizing layer 90 away from the substrate 10 and at least a portion of the surface of the second source-drain electrode layer 80 away from the substrate 10.

[0088] According to some embodiments of the present disclosure, referring to FIG. 15 , the connecting bridge region C includes a substrate 10, a first trace 71, a second planarizing layer 90, a second trace 81, a first planarizing layer 20, a first inorganic encapsulating film layer 61, and a second inorganic encapsulating film layer 63. The second planarizing layer 90 covers the surface of the first trace 71 away from the substrate 10, the second trace 81 covers a portion of the surface of the second planarizing layer 90 away from the substrate 10, the first planarizing layer 20 covers the surface of the second trace 81 away from the substrate 10 and a portion of the surface of the second planarizing layer 90 away from the substrate 10, the first inorganic encapsulating film layer 61 covers the surface of the first planarizing layer 20 away from the substrate 10, and the second inorganic encapsulating film layer 63 covers the surface of the first inorganic encapsulating film layer 61 away from the substrate 10. The first trace 71 can be formed using the same process steps as the first source / drain electrode layer 70 in the pixel island region A, and the second trace 81 can be formed using the same process steps as the second source / drain electrode layer 80 in the pixel island region A.

[0089] In general, the display panel proposed in the present disclosure has an inconspicuous seam, can maintain a relatively high resolution, and has a good display effect.

[0090] In another aspect of the present disclosure, a method for manufacturing the display panel as described above is provided. According to an embodiment of the present disclosure, referring to FIG29 , the method for manufacturing the display panel as described above may include the following steps.

[0091] S110 , providing a plurality of original sub-display panels.

[0092] According to some embodiments of the present disclosure, in this step, a plurality of original sub-display panels are provided, and the structure of the original sub-display panels can refer to FIG. 11 and FIG. 12 .

[0093] S120 , bending the first frame and the second frame of each original sub-display panel among the plurality of original sub-display panels toward a side away from the display surface of the original sub-display panel to obtain a sub-display panel.

[0094] According to some embodiments of the present disclosure, the sub-display panel 100 can be obtained by bending the first frame 110 and the second frame 120 of the original sub-display panel toward a side away from the display surface of the original sub-display panel. According to other embodiments of the present disclosure, referring to Figures 11 and 12, the method for manufacturing a display panel can further include the step of bending the first bent portion 130 toward a side away from the display surface. It should be noted that the display surface is the light-emitting surface of the original sub-display panel or the light-emitting surface of the display panel.

[0095] According to other embodiments of the present disclosure, referring to FIG. 12 , the method for manufacturing a display panel may further include a step of bending the third frame 160 toward a side away from the display surface.

[0096] S130 , bringing a first frame of a sub-display panel into contact with a second frame of another sub-display panel, so that a plurality of sub-display panels are spliced ​​together to form a display panel.

[0097] In this step, the first frame 110 of each sub-display panel 100 can be brought into contact with the second frame 120 of another sub-display panel 100, so that multiple sub-display panels 100 are spliced ​​into a surrounding display structure, as shown in Figures 2, 8 and 9; the first frame 110 of a part of the sub-display panels 100 can also be brought into contact with the second frame 120 of another sub-display panel 100, so that multiple sub-display panels 100 are spliced ​​to form the display structure shown in Figures 5 to 7.

[0098] The following describes methods for manufacturing display panels of different shapes with reference to the specific structures in the accompanying drawings.

[0099] According to some embodiments of the present disclosure, referring to FIG11 , the original sub-display panel may be fan-shaped (here, it is sufficient that the shape of the original sub-display panel is roughly fan-shaped). The side of the original sub-display panel facing away from the display surface is attached to the mold, and the first frame 110 and the second frame 120 of the original sub-display panel 100 are bent toward the side away from the display surface of the original sub-display panel to obtain the sub-display panel 100. (As shown in Figure 10), wherein the mold can be a sphere or a part of a sphere; the first frame 110 of one sub-display panel 100 is brought into contact with the second frame 120 of another sub-display panel 100, specifically, as shown in Figures 18 to 20, Figure 18 shows a schematic diagram of the two sub-display panels when they are not stretched, Figure 19 is a schematic diagram of the planes of the two sub-display panels in Figure 18 being stretched into arc surfaces, and the cross-section of the two sub-display panels along MM' is shown in Figure 19, the dotted line is a schematic diagram of the two sub-display panels before stretching, and the solid line is a schematic diagram of the two sub-display panels being stretched along the mold to form an arc, the sub-display panels are formed into an arc structure by using the mold, and the operation is repeated to splice multiple sub-display panels 100 to form a spherical display panel or a part of a spherical display panel, as shown in Figures 2 to 4. The structural schematic diagram of two adjacent sub-display panels after splicing can be referred to Figure 20. The first frame 110 and the second frame 120 of the sub-display panel 100 can be bent 90 degrees (vertically bent) relative to the first display surface 140. The first frame of one sub-display panel and the second frame of the other sub-display panel are set in contact with each other. In this way, the frame (splicing seam) is visually invisible, thereby achieving frameless (no splicing seam) splicing.

[0100] It should be noted that after the display panels are spliced, the mold can be removed or retained. The retained mold can play a good supporting role. Of course, the retained mold also needs to be provided with a groove structure for placing the first frame and the second frame.

[0101] According to some embodiments of the present disclosure, referring to Figures 18 to 21, multiple sub-display panels can be first assembled into the hemispherical shape shown in Figure 21, and then two hemispherical sub-display panels can be assembled to form the spherical display panel shown in Figure 2. It should be noted that the decomposed image of the hemisphere in Figure 21 includes multiple fan-shaped curved surfaces similar to petals.

[0102] According to some embodiments of the present disclosure, splicing a plurality of sub-display panels 100 to form a display panel 1000 may further include: bending the third frame 160 of the original sub-display panel to the side away from the display surface of the original sub-display panel. According to one embodiment of the present disclosure, as shown in FIG7 , the four sub-display panels may be arranged in sequence and contacted, with the second frame of the first sub-display panel contacting the first frame of the second sub-display panel, the second frame of the second sub-display panel contacting the first frame of the third sub-display panel, and the second frame of the third sub-display panel contacting the first frame of the fourth sub-display panel, and the third frame and / or the first bending portion only being bent to the side away from the first display surface. According to another embodiment of the present disclosure, with reference to FIG9 , the four sub-display panels are contacted and arranged in a surrounding manner in sequence, so that the first frame (or second frame) of each of the four sub-display panels is contacted with the second frame (or first frame) of another sub-display panel.

[0103] According to some embodiments of the present disclosure, splicing multiple sub-display panels 100 to form a display panel 1000 may also include: setting the third frame 160 of the sub-display panel 100 in contact with the third frame 160 or the first bending portion 130 of another sub-display panel 100, as shown in Figures 5, 6 and 8.

[0104] According to some embodiments of the present disclosure, the maximum size of the sub-display panel can be any value between 3 inches and 20 inches. For example, the maximum size of the sub-display panel can be 3 inches, 5 inches, 8 inches, 10 inches, 14 inches, 20 inches, etc., where the maximum size refers to the maximum length of the line between any two endpoints in the sub-display panel.

[0105] According to some embodiments of the present disclosure, referring to FIG. 22 to FIG. 24 , manufacturing an original sub-display panel may include the following steps.

[0106] S111, providing an original substrate.

[0107] According to some embodiments of the present disclosure, referring to FIG. 22 , the original substrate 10 ′ may include a first preset area A′, a second preset area B′, and a third preset area C′, which correspond to the pixel island area A, the hollow area B, and the connecting bridge area C in FIG. 24 , respectively.

[0108] In this step, the original substrate 10' may be placed on the surface of the substrate 200. According to some embodiments of the present disclosure, the substrate 200 may be a glass substrate, which may provide a flat surface and support other film layers.

[0109] S112 , forming an original first planar layer on one side of the original substrate, and removing the original first planar layer in the second preset area.

[0110] According to some embodiments of the present disclosure, an original first planar layer 20' is formed on one side of the original substrate 10', and the original first planar layer 20' in the second predetermined area B' is removed. The material forming the original first planar layer 20' may include polyimide.

[0111] According to some embodiments of the present disclosure, before forming the original first flat layer 20', referring to Figure 22, the method for manufacturing the original sub-display panel may further include the steps of forming a barrier layer 1, a buffer layer 2, and an active layer 3. According to an embodiment of the present disclosure, the buffer layer can be formed by depositing one or both of silicon nitride and silicon oxide. After forming the buffer layer, an amorphous silicon layer is deposited on the surface of the buffer layer away from the original substrate. After high-temperature dehydrogenation, the amorphous silicon is converted into polycrystalline silicon by excimer laser annealing (ELA), and a channel layer pattern is formed by exposure and etching, wherein the channel layer may include partial ion doping, thereby obtaining the active layer 3.

[0112] According to some embodiments of the present disclosure, with reference to FIG22 , the method for manufacturing the original sub-display panel further includes the steps of forming a first gate insulating layer 4, a first gate electrode layer 5, a second gate insulating layer 6, a second gate electrode layer 7, and an interlayer dielectric layer 8. Specifically, an original first gate insulating layer is formed, the original first gate insulating layer covers the surface of the active layer away from the original substrate and the partial surface of the buffer layer away from the original substrate; a first gate metal is deposited and a first gate layer 5 is formed by patterning, the first gate layer 5 may include a first gate electrode and a wiring structure provided in the same layer as the first gate electrode; a second gate insulating material is deposited to form an original second gate insulating layer, the original second gate insulating layer covers at least a partial surface of the first gate electrode layer 5 away from the original substrate 10' and a partial surface of the original first gate insulating layer away from the original substrate 10'; when the original second gate insulating layer is away from the original substrate 10' A second gate metal is deposited on the surface and a second gate layer 7 is formed by patterning. The second gate layer 7 may include a second gate and a wiring structure arranged on the same layer as the second gate; an interlayer dielectric layer material is deposited to form an original interlayer dielectric layer, and vias are formed by exposure and etching. The vias penetrate the original interlayer dielectric layer and the original second gate insulating layer and extend to a portion of the surface of the active layer 3 away from the original substrate 10'. In this step, the barrier layer 1, the buffer layer 2, the original first gate insulating layer, the original second gate insulating layer, etc. in the third preset area C' need to be completely etched away to expose the original substrate 10' in the third preset area C'.

[0113] According to some embodiments of the present disclosure, with reference to FIG22 , the method for manufacturing the original sub-display panel may further include the steps of forming a first source-drain electrode layer 70, forming a second flat layer 90, and forming a second source-drain electrode layer 80. According to an embodiment of the present disclosure, source-drain metal is deposited and the first source-drain electrode layer 70 and the first wiring 71 are formed by patterning. A second flat layer is formed, and vias are formed by etching to penetrate the first source-drain electrode layer 70. In the first preset area A', the second flat layer 90 covers the surface of the first source-drain electrode layer 70 away from the original substrate 10' and the portion of the surface of the interlayer dielectric layer 8 away from the original substrate 10'; in the third preset area C', the second flat layer 90 covers the surface of the first wiring 71 and the portion of the surface of the original substrate 10'. Source and drain electrode metal is deposited and patterned to form a second source and drain electrode layer 80 and a second wiring 81. In the first preset area A', the second source and drain electrode layer 80 may include a second source and drain electrode and a wiring structure arranged on the same layer as the second source and drain electrode; in the third preset area C', the second wiring 81 covers a portion of the surface of the second planar layer 90 away from the original substrate 10'.

[0114] It should be noted that when forming the original first planar layer 20', in the third predetermined region C', the original first planar layer 20' covers the surface of the second trace 81 away from the original substrate 10' and the portion of the surface of the second planar layer 90 away from the original substrate 10'. Furthermore, referring to FIG. 22 , after forming the original first planar layer 20', the process also includes forming a via hole for connecting the anode 151': the original first planar layer 20' is exposed and etched to expose a portion of the surface of the second source-drain electrode layer 80. The subsequently formed anode 151' can be connected to the second source-drain electrode layer 80 through this via hole.

[0115] S113, forming an original first passivation layer on a side of the original first flat layer away from the original substrate, removing the original first passivation layer in the second preset area and the third preset area, using gas to etch the original first passivation layer and the original first flat layer in the first preset area to obtain a first flat layer, and forming a first opening in the original first passivation layer, wherein the first flat layer has a groove, the cross-section of the groove along the first direction is an inverted trapezoid, the first direction is the direction from the original substrate to the first flat layer; and the orthographic projection of the first opening on the original substrate falls within the orthographic projection range of the edge of the groove away from the original substrate on the original substrate.

[0116] In this step, an original first passivation layer 30' is formed on the side of the original first flat layer 20' away from the original substrate 10', and the original first passivation layer 30' of the second preset area B' and the third preset area C' is removed by patterning, and the original first passivation layer 30' and the original first flat layer 20' of the first preset area A' are etched by gas to obtain the first flat layer 20, and the original first passivation layer 30' is formed with a first opening 31 (refer to Figure 16), wherein, referring to Figure 22 and Figure 16, the first flat layer 20 has a groove 21, and the cross-section of the groove 21 along the first direction is an inverted trapezoid, the first direction (i.e., the Y direction shown in Figure 22) is the direction from the original substrate 10' to the first flat layer 20, and the orthographic projection of the first opening 31 on the original substrate 10' falls within the orthographic projection range of the edge of the groove 21 away from the original substrate 10' on the original substrate 10'. In this step, an undercut structure is formed on the first flat layer 20 using the original first passivation layer 30' as a mask, thereby effectively preventing the cathode material from entering under the "brim" of the undercut structure during the subsequent deposition of the cathode material, thereby improving the stability of the display panel and helping to extend the service life of the display panel.

[0117] According to some embodiments of the present disclosure, the material forming the original first passivation layer 30 ′ may include one or more of silicon nitride, silicon oxide, and silicon oxynitride.

[0118] S114 , forming an original second passivation layer on a side of the original first passivation layer away from the original substrate.

[0119] According to an embodiment of the present disclosure, an original second passivation layer 40' is formed on a side of the original first passivation layer 30' away from the original substrate 10'. Referring to FIG. 22 , the original second passivation layer 40' covers the surface of the original first passivation layer 30' away from the original substrate 10', the bottom of the groove 21, and at least a portion of the sidewalls of the groove 21. The original second passivation layer 40' has a second opening 41. The orthographic projection area of ​​the portion of the original second passivation layer 40' located at the bottom of the groove 21 on the original substrate 10' is larger than the orthographic projection area of ​​the second opening 41 on the original substrate 10'. Furthermore, the orthographic projection of the portion of the original second passivation layer 40' located at the bottom of the groove 21 on the original substrate 10' covers the orthographic projection of the second opening 41 on the original substrate 10'.

[0120] S115 , exposing and etching the original second passivation layer and the original first passivation layer to form a first via hole, thereby obtaining the second passivation layer and the first passivation layer.

[0121] Referring to Figure 22, in this step, a passivation layer material is deposited to form an original second passivation layer 40', and the original second passivation layer 40' and the original first passivation layer 30' are exposed and etched to form a first via 9 (refer to Figure 16), exposing the second source-drain electrode layer 80, thereby forming a second passivation layer 40, and the second passivation layer 40 covers the undercut structure.

[0122] According to some embodiments of the present disclosure, the material of the second passivation layer 40 may include one or more of silicon nitride, silicon oxide, and silicon oxynitride.

[0123] In some embodiments of the present disclosure, referring to FIG23, after forming the original first flat layer 20', a groove-shaped via hole as shown in FIG23 can be formed by exposure to expose a portion of the surface of the second source-drain electrode layer 80; thereafter, an original first passivation layer 30' is formed, and the original first passivation layer 30' covers a portion of the surface of the first flat layer 20 and a portion of the surface of the second source-drain electrode layer 80; an original second passivation layer 40' is formed, and above the second source-drain electrode layer 80, the original first passivation layer 30' and the original second passivation layer 40' can also have a groove-shaped structure. The original second passivation layer 40' and the original first passivation layer 30' are exposed and etched to expose a portion of the surface of the second source-drain electrode layer 80, and then the anode 151' is formed. It should be noted that FIG23 only shows a partial structure of the first flat layer 20, the first passivation layer 30, the second passivation layer 40, etc., and does not show the undercut structure. In addition, in the process of etching the original second passivation layer 40' to form the first via hole, a portion of the first flat layer 20 can also be etched away according to actual needs.

[0124] S116, forming a plurality of light-emitting units in the first preset area.

[0125] A pixel may include multiple sub-pixels. According to some embodiments of the present disclosure, each pixel may include a blue sub-pixel, a red sub-pixel and a green sub-pixel. The light-emitting unit is part of the sub-pixel and may include an anode 151', a light-emitting layer 151" and a cathode 151'".

[0126] Forming a plurality of light emitting units in the first predetermined area A' may include forming a blue light emitting unit, forming a red light emitting unit, and forming a green light emitting unit.

[0127] According to some embodiments of the present disclosure, an anode metal is deposited and patterned to form an anode 151'. The material of the anode 151' may include at least one of indium tin oxide (ITO) and silver (Ag). According to some embodiments of the present disclosure, the anode 151' may include a first ITO layer, a silver layer, and a second ITO layer stacked in sequence.

[0128] According to some embodiments of the present disclosure, the pixel defining layer 50 can be formed by coating and exposure. The pixel defining layer 50 covers the portion of the surface of the second passivation layer 40 away from the original substrate 10' and the portion of the surface of the anode 151' away from the original substrate 10'. In addition, referring to Figure 22, the pixel defining layer 50 defines a plurality of third openings 51. Subsequently, the light-emitting layer 151" can be formed in the third openings 51 by evaporating an organic light-emitting material. Thereafter, a cathode metal is evaporated on the side of the light-emitting layer 151" away from the original substrate 10' to form a cathode 151"'. Of course, forming a light-emitting unit can also include the steps of forming a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer.

[0129] S117, removing the original substrate in the second preset area to form a hollow area.

[0130] After the light emitting unit is formed, the hollow area B may be formed by etching the original substrate 10 ′ in the second predetermined area B′. After removing the base plate 200 , the original sub-display panel may be obtained.

[0131] According to other embodiments of the present disclosure, referring to FIG24 , the production of the original sub-display panel may further include the step of forming an encapsulation layer 60: forming a first inorganic encapsulation film layer 61, which may be formed by chemical vapor deposition. In the first preset area A', the first inorganic encapsulation film layer 61 covers at least a portion of the surface of the cathode 151' away from the original substrate 10' and at least a portion of the surface of the second passivation layer 40 away from the original substrate 10'; in the third preset area C', the first inorganic encapsulation film layer 61 covers a portion of the surface of the original substrate 10' and a surface of the first flat layer 20 away from the original substrate 10'. In the second preset area B', the first inorganic encapsulation film layer 61 may cover at least a portion of the surface of the original substrate 10' (not shown in FIG24 ). An organic encapsulation film layer 62 is formed, and the organic encapsulation film layer 62 is The graphic structure, the organic encapsulation film layer 62 fills the second opening 41 and covers at least part of the surface of the first inorganic film layer 61 away from the original substrate, and no organic encapsulation film layer is provided in the third preset area C'. A second inorganic encapsulation film layer 63 is formed, and the second inorganic encapsulation film layer 63 can also be formed by chemical vapor deposition. In the first preset area A', the second inorganic encapsulation film layer 63 covers part of the surface of the first inorganic encapsulation film layer 61 and the surface of the organic encapsulation film layer 62 away from the original substrate 10'; in the third preset area C', the second inorganic encapsulation film layer 63 covers the surface of the first inorganic encapsulation film layer 61 and part of the surface of the original substrate 10'. In the second preset area B', the second inorganic encapsulation film layer 63 can cover at least part of the surface of the first inorganic encapsulation film layer 61 away from the original substrate 10' (not shown in FIG. 24 ).

[0132] According to some embodiments of the present disclosure, after forming the encapsulation layer 60, the first inorganic encapsulation film layer 61 and the second inorganic encapsulation film layer 62 in the second predetermined area B' can be removed by etching to expose the original substrate 10'. Thereafter, the original substrate 10' in the second predetermined area B' can be removed by exposure and etching, and a via hole can be formed in the second predetermined area B', thereby obtaining a hollow area B. According to some embodiments of the present disclosure, a protective film can be applied to the side of the encapsulation layer 60 away from the substrate 10, and the substrate 200 can be removed using a laser, and the protective film can be removed to obtain the original sub-display panel.

[0133] In another aspect of the present disclosure, a method for manufacturing a display panel is provided. According to some embodiments of the present disclosure, referring to FIG30 , the method for manufacturing a display panel may include the following steps.

[0134] S210 , calculating the pixel pitch according to the width of the fourth frame, the width of the fifth frame, and the lamination tolerance of the sub-display panel.

[0135] In this step, the pixel pitch D may be calculated based on the fourth frame size W1 , the fifth frame size W2 , and the lamination tolerance W3 of the sub-display panel 100 , where D= W1 + W2 + W3 .

[0136] Referring to FIG25 , the sub-display panel 100 may be fan-shaped, and the width W1 of the fourth frame 170 and the width W2 of the fifth frame 180 may be average widths. Referring to FIG26 , the sub-display panel 100 may be rectangular, and the fourth frame 170 and the fifth frame 180 may be rectangular frames. The fourth and fifth frames do not have pixel structures and do not have display functions.

[0137] S220 , manufacturing a plurality of sub-display panels, wherein a distance between two adjacent pixels in each of the plurality of sub-display panels is a pixel distance, and the sub-display panel has a fourth frame and a fifth frame.

[0138] In this step, a plurality of sub-display panels 100 may be manufactured. The distance between two adjacent pixels in each sub-display panel 100 is a pixel distance D. Each sub-display panel 100 has a fourth frame 170 and a fifth frame 180 .

[0139] S230 , splicing a plurality of sub-display panels to form a display panel, wherein a fourth frame of at least one sub-display panel among the plurality of sub-display panels is arranged in contact with a fifth frame of a sub-display panel adjacent to the sub-display panel.

[0140] In this step, multiple sub-display panels 100 are spliced ​​to form a display panel, wherein the fourth frame 170 of at least one sub-display panel 100 among the multiple sub-display panels is arranged in contact with the fifth frame 180 of the sub-display panel 100 adjacent to the sub-display panel 100.

[0141] According to some embodiments of the present disclosure, referring to Figure 27, a plurality of fan-shaped sub-display panels can be spliced ​​together to form an irregular display panel. Along the second direction (i.e., the Z direction shown in Figure 27), the fourth frame 170-1 of the first sub-display panel and the fifth frame 180-3 of the third sub-display panel may not contact other sub-display panels, the fourth frame 170-2 of the second sub-display panel is arranged in contact with the fifth frame 180-1 of the first sub-display panel, and the fifth frame 180-2 of the second sub-display panel is arranged in contact with the fourth frame 170-3 of the third sub-display panel. The fourth frame 170 and the fifth frame 180 of each sub-display panel do not need to be bent toward the side away from the display surface.

[0142] According to other embodiments of the present disclosure, referring to FIG28 , a plurality of rectangular sub-display panels may be spliced ​​together to form a rectangular display panel, and along a third direction (i.e., the X direction shown in FIG28 ), the fourth frame 170-4 of the fourth sub-display panel and the fifth frame 180-5 of the fifth sub-display panel do not need to be bent, and the fifth frame 180-4 of the fourth sub-display panel and the fourth frame 170-5 of the fifth sub-display panel are arranged in contact.

[0143] It should be noted that the sub-display panel used in this method may also have a first bend that bends away from the display surface. Of course, in some embodiments, the sub-display panel may also have a sixth frame that contacts both the fourth and fifth frames. During the splicing process, the sixth frame of one sub-display panel may be placed in contact with the sixth frame or the edge of the first bend of another sub-display panel near the display surface.

[0144] The display panel manufactured by the above method also has no obvious joint seams, and the display panel has a good display effect, and the viewer experience is better.

[0145] In another aspect of the present disclosure, a display device is provided. According to some embodiments of the present disclosure, the display device may include the display panel described above or a display panel manufactured using the method described above. Thus, the display device has a good display effect, thereby providing a better viewer experience.

[0146] According to the embodiments of the present disclosure, there are no special requirements for the specific type of the display device, and those skilled in the art can flexibly select according to actual needs. Those skilled in the art will understand that in addition to the display panel described above, the display device can also have the necessary structures and components of a conventional display device, such as a touch panel, an audio module, etc.

[0147] The terms "first," "second," "third," "fourth," "fifth," and "sixth" herein are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first," "second," "third," "fourth," "fifth," or "sixth" may explicitly or implicitly include one or more of such features. In the description of this disclosure, "plurality" means two or more, unless otherwise specifically defined.

[0148] In the description of this specification, the description with reference to the terms "one embodiment", "another embodiment", "some embodiments", "some specific embodiments" or "some other specific embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0149] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A display panel, wherein: The display panel is composed of a plurality of sub-display panels spliced ​​together; Each of the multiple sub-display panels has a first display surface, and the sub-display panel has a first frame and a second frame, the first frame and the second frame are bent toward a side away from the first display surface, and the first frame of at least one sub-display panel among the multiple sub-display panels is arranged in contact with the second frame of the sub-display panel adjacent to the sub-display panel.

2. The display panel according to claim 1, wherein: The sub-display panel has a plurality of hollow areas.

3. The display panel according to claim 2, wherein: The sub-display panel includes a plurality of pixel islands and a plurality of connecting bridges. The hollow region is located between the pixel islands and the connecting bridges. The connecting bridges connect two adjacent pixel islands and include wiring.

4. The display panel according to claim 3, wherein: The sub-display panel comprises a substrate, a first flat layer and a first passivation layer, the substrate and the first flat layer are located in the pixel island area and the connecting bridge area, and the first passivation layer is located in the pixel island area; The first flat layer is located at one side of the substrate, the first flat layer has a groove, the cross section of the groove along a first direction is an inverted trapezoid, and the first direction is a direction from the substrate to the first flat layer; as well as The first passivation layer covers a portion of the surface of the first planar layer away from the substrate. The first passivation layer has a first opening. The orthographic projection of the first opening on the substrate falls within the orthographic projection range of the edge of the groove away from the substrate on the substrate.

5. The display panel according to claim 4, wherein: The sub-display panel also includes a second passivation layer, which is located in the pixel island area, and covers the surface of the first passivation layer away from the substrate, the bottom of the groove and at least part of the side wall of the groove, the second passivation layer has a second opening, and the area of ​​the orthographic projection of the part of the second passivation layer located at the bottom of the groove on the substrate is larger than the area of ​​the orthographic projection of the second opening on the substrate, and the orthographic projection of the part of the second passivation layer located at the bottom of the groove on the substrate covers the orthographic projection of the second opening on the substrate.

6. The display panel according to claim 5, wherein: The sub-display panel also includes a pixel defining layer, an anode, a light-emitting layer and a cathode, wherein the pixel defining layer, the anode and the cathode are located in the pixel island area, the pixel island area includes at least one pixel, the anode covers a portion of the surface of the second passivation layer away from the substrate, the pixel defining layer defines a plurality of third openings, the pixel defining layer covers a portion of the surface of the anode away from the substrate, the light-emitting layer fills at least a portion of the third openings, the cathode is located on a side of the light-emitting layer away from the substrate, the cathode covers a portion of the surface of the pixel defining layer away from the substrate, and an orthographic projection of the cathode on the substrate has no overlapping area with an orthographic projection of the groove on the substrate.

7. The display panel according to any one of claims 1 to 6, wherein: The sub-display panel has a first bending portion, the first bending portion includes a flexible circuit board and an integrated circuit, and the first bending portion is bent toward a side away from the first display surface.

8. The display panel according to claim 7, wherein: The first bending portion includes a stretchable transition zone, which is located between the first display surface and the flexible circuit board. The stretchable transition zone has a first edge and a second edge, the first edge partially overlaps with the edge of the first display surface, and the second edge at least partially overlaps with the edge of the flexible circuit board.

9. The display panel according to claim 8, wherein: A distance between the first side and the second side is greater than or equal to 1 mm.

10. The display panel according to any one of claims 1 to 6, 8 and 9, wherein: The sub-display panel is fan-shaped, and the display panel is spherical or a part of a sphere.

11. The display panel according to claim 10, wherein: The display panel is a part of a sphere, and the number of the sub-display panels in the display panel is any value between 2 and 10; or, The display panel is spherical, and the number of the sub-display panels in the display panel is any value between 8 and 20.

12. The display panel according to claim 8 or 9, wherein: The at least one sub-display panel further has a third frame, the third frame is located at one end of the sub-display panel, and the third frame is bent toward a side away from the first display surface.

13. The display panel according to claim 12, wherein: The display surface of the display panel is a rectangular plane or a special-shaped plane, and the at least one sub-display surface The third frame of the panel is arranged in contact with the third frame or the first bending portion of another sub-display panel; or, The display panel has six display surfaces, and the six display surfaces of the display panel constitute six surfaces of a rectangular parallelepiped; or, The display panel has four display surfaces, and the four display surfaces of the display panel are connected in sequence to form four side surfaces of a cuboid.

14. A method for manufacturing a display panel according to any one of claims 1 to 13, comprising: Providing a plurality of original sub-display panels; bending the first frame and the second frame of each original sub-display panel of the plurality of original sub-display panels toward a side away from the display surface of the original sub-display panel to obtain a sub-display panel; as well as The first frame of the sub-display panel is brought into contact with the second frame of another sub-display panel, so that a plurality of the sub-display panels are spliced ​​together to form a display panel.

15. The method according to claim 14, wherein: The original sub-display panel is fan-shaped, and the side of the original sub-display panel facing away from the display surface is attached to the mold, so that the first frame and the second frame of the original sub-display panel are bent toward the side away from the display surface of the original sub-display panel, so as to obtain the sub-display panel, wherein the mold is a sphere or a part of a sphere; The first frame of one sub-display panel is brought into contact with the second frame of another sub-display panel, and the operation is repeated to splice a plurality of sub-display panels to form a spherical display panel or a part of a spherical display panel; or The step of splicing the plurality of sub-display panels to form a display panel further comprises: bending the third frame of the original sub-display panel toward a side away from the display surface of the original sub-display panel; or The step of splicing a plurality of the sub-display panels to form a display panel further includes: placing the third frame of the sub-display panel in contact with the third frame or the first bending portion of another sub-display panel.

16. The method according to claim 14 or 15, wherein: Manufacturing the original sub-display panel includes: Providing an original substrate, wherein the original substrate includes a first preset area, a second preset area, and a third preset area; forming an original first flat layer on one side of the original substrate, and removing the original first flat layer in the second preset area; An original first passivation layer is formed on a side of the original first flat layer away from the original substrate, and the original first passivation layer in the second preset area and the third preset area is removed, and the original first passivation layer and the original first flat layer in the first preset area are etched by gas to obtain a first flat layer, and a first opening is formed in the original first passivation layer, wherein the first flat layer has a groove, and the cross-section of the groove along a first direction is an inverted trapezoid, and the first direction is the direction from the original substrate to the first flat layer; and the orthographic projection of the first opening on the original substrate falls within the orthographic projection range of the edge of the groove away from the original substrate on the original substrate.

17. The method according to claim 16, wherein: Manufacturing the original sub-display panel further includes: forming an original second passivation layer on a side of the original first passivation layer away from the original substrate, wherein the original second passivation layer covers the surface of the original first passivation layer away from the original substrate, the bottom of the groove and at least part of the sidewall of the groove, the original second passivation layer has a second opening, the orthographic projection area of ​​the portion of the original second passivation layer located at the bottom of the groove on the original substrate is larger than the orthographic projection area of ​​the second opening on the original substrate, and the orthographic projection of the portion of the original second passivation layer located at the bottom of the groove on the original substrate covers the orthographic projection of the second opening on the original substrate; Exposing and etching the original second passivation layer and the original first passivation layer to form a first via hole, thereby obtaining a second passivation layer and a first passivation layer; forming a plurality of light emitting units in the first preset area; and The original substrate in the second preset area is removed to form a hollow area.

18. A method for manufacturing a display panel, comprising: Calculating the pixel pitch according to the width of the fourth frame, the width of the fifth frame and the fitting tolerance of the sub-display panel; Manufacturing a plurality of sub-display panels, wherein a distance between two adjacent pixels in the sub-display panels is the pixel distance, and the sub-display panels have a fourth frame and a fifth frame; and The plurality of sub-display panels are spliced ​​together to form a display panel, wherein the plurality of sub-display panels The fourth frame of at least one sub-display panel is arranged in contact with the fifth frame of the sub-display panel adjacent to the sub-display panel.

19. A display device, wherein: The invention comprises a display panel as claimed in any one of claims 1 to 13 or a display panel manufactured by using a method as claimed in any one of claims 14 to 18.

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