Display panel, manufacturing method thereof, and display device

Abstract

The present invention provides a display panel, a preparation method thereof, and a display device, wherein the display panel includes a plurality of sub-display panels spliced in sequence, and any of the sub-display panels includes: a first substrate; a display layer, arranged on the first substrate; a protective layer, arranged on the side of the display layer along a first direction and / or on the side of the display layer in a direction opposite to the first direction; the plurality of sub-display panels spliced in sequence include at least two sub-display panels spliced along the first direction, and in the two sub-display panels spliced along the first direction, the first substrate of one sub-display panel protrudes toward the other sub-display panel compared to the display layer, and the display layer and protective layer of one sub-display panel are spaced from the display layer and protective layer of the other sub-display panel. The display panel can effectively prevent the protective layer located on the side of the display layer from being bumped and damaged, thereby causing poor display.

Description

Technical Field

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

[0002] Currently, panels are diversified. Compared with traditional organic light-emitting diode (OLED) and liquid crystal display (LCD) display technologies, micro light-emitting diode (Micro LED) display technology has lower power consumption, faster response time, and higher image resolution and color gamut. However, due to the size limitations of Micro LED display panels, large-scale Micro LED display devices are currently mainly composed of multiple display panels spliced together in sequence.

[0003] Because the metal film layer is exposed at the edge of the Micro LED display panel, there is a risk of water vapor corrosion and oxidation. The conventional solution is to encapsulate a protective layer on the side to protect the edge circuit area. However, during the splicing process of the entire device, in order to achieve a narrow bezel effect, the various Micro LED display panels need to be compactly spliced. The protective layer encapsulated on the side is relatively thin and easily bumped and scratched, which in turn affects its protection performance and ultimately leads to poor display. Summary of the Invention

[0004] The present invention provides a display panel, a manufacturing method thereof, and a display device. The display panel can solve the problem of bumping and scratching of a protective layer on the side of a sub-display panel.

[0005] To solve the above problems, in a first aspect, the present invention provides a display panel, wherein the display panel includes a plurality of sub-display panels spliced in sequence, and any of the sub-display panels includes:

[0006] a first substrate;

[0007] A display layer is provided on the first substrate;

[0008] a protective layer, disposed on a side surface of the display layer along a first direction and / or a side surface along a direction opposite to the first direction;

[0009] A plurality of sub-display panels spliced in sequence include at least two sub-display panels spliced along the first direction. In the two sub-display panels spliced along the first direction, the first substrate of one sub-display panel protrudes toward the other sub-display panel compared to the display layer, and the display layer and protective layer of one sub-display panel are spaced from the display layer and protective layer of the other sub-display panel.

[0010] In a display panel provided by an embodiment of the present invention, in two adjacent sub-display panels along a first direction, the first substrate of one sub-display panel has a first side surface facing the other sub-display panel, and the first side surface forms an acute angle with the side surface of the first substrate away from the display layer.

[0011] In a display panel provided by an embodiment of the present invention, the display layer of the sub-display panel has a second side surface facing another sub-display panel, the second side surface forms an acute angle with the side surface of the display layer close to the first substrate, and the first side surface is connected to the second side surface.

[0012] In a display panel provided in an embodiment of the present invention, any one of the sub-display panels further comprises a second substrate disposed on the side of the display layer away from the first substrate. In two adjacent sub-display panels along a first direction, the second substrate of one sub-display panel has a third side facing the other sub-display panel, the third side forms an acute angle with the side of the second substrate close to the display layer, and the third side is connected to the second side.

[0013] In a display panel provided by an embodiment of the present invention, the third side surface is coplanar with the second side surface, and the second side surface is coplanar with the first side surface.

[0014] In a display panel provided by an embodiment of the present invention, a protrusion distance of the first substrate of one sub-display panel from the display layer toward another sub-display panel is greater than or equal to 5 times the thickness of the protective layer.

[0015] In a second aspect, the present invention further provides a method for manufacturing a display panel, the method comprising the following steps:

[0016] S10: providing a plurality of sub-display panels, wherein any of the sub-display panels comprises a first substrate; a display layer disposed on the first substrate; and a protective layer disposed on a side surface of the display layer along a first direction and / or a side surface in a direction opposite to the first direction;

[0017] S20: Splice each of the sub-display panels in sequence, and the multiple sub-display panels spliced in sequence include at least two sub-display panels spliced along the first direction. In the two sub-display panels spliced along the first direction, the first substrate of one sub-display panel protrudes toward the other sub-display panel compared to the display layer, and the display layer and protective layer of one sub-display panel are spaced from the display layer and protective layer of the other sub-display panel.

[0018] In a method for manufacturing a display panel provided by an embodiment of the present invention, the step of providing any one of the sub-display panels in step S10 specifically includes:

[0019] Providing a sub-display panel to be cut, the sub-display panel comprising a first substrate, a display layer and a second substrate disposed on the first substrate;

[0020] attaching a crack buffer film on a side of the first substrate away from the display layer;

[0021] Cutting a crack on a side of the second substrate away from the display layer corresponding to an edge of the crack buffer film, wherein the crack includes a first crack located on one side of the first direction, and an orthographic projection of the first crack on the crack buffer film is located within the edge of the crack buffer film;

[0022] performing a splitting process on the display panel to be cut along the cutting crack to remove a portion outside the cutting crack to obtain a cut display panel;

[0023] A protective layer is formed on a side surface of the display layer of the cut display panel along a first direction and / or a side surface along a direction opposite to the first direction to obtain the sub-display panel.

[0024] In a method for manufacturing a display panel provided by an embodiment of the present invention, the fracture toughness of the crack buffer film is greater than the fracture toughness of the first substrate.

[0025] In a third aspect, the present invention further provides a display device, which includes the aforementioned display panel.

[0026] Beneficial effects: The present invention provides a display panel, a preparation method thereof, and a display device, wherein the display panel comprises a plurality of sub-display panels spliced in sequence, and any of the sub-display panels comprises: a first substrate; a display layer disposed on the first substrate; a protective layer disposed on a side surface of the display layer along a first direction and / or on a side surface in a direction opposite to the first direction; the plurality of sub-display panels spliced in sequence comprise at least two sub-display panels spliced along the first direction, and in the two sub-display panels spliced along the first direction, the first substrate of one sub-display panel is protruded toward the other sub-display panel relative to the display layer of the sub-display panel, Thereby, the display layer and the protective layer of one sub-display panel are spaced apart from the display layer and the protective layer of another sub-display panel. With such an arrangement, the portion of the first substrate protruding toward the other sub-display panel compared to the display layer can play a limiting role during splicing. Even if the two sub-display panels spliced along the first direction are compactly spliced, the protective layer at the splicing point will not be damaged by bumps. That is, the display panel provided by the present invention can effectively avoid the problem of the protective layer located on the side of the display layer being bumped and damaged when the sub-display panels are spliced, thereby causing poor display, thereby improving the yield of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic diagram of the cross-sectional structure of a display panel provided by the prior art of the present invention;

[0029] Figure 2 is a schematic diagram of a planar structure of a display panel provided by an embodiment of the present invention;

[0030] Figure 3 yes Figure 2 A schematic diagram of a cross-sectional structure at the AA' position;

[0031] Figure 4 yes Figure 2 Another cross-sectional structural diagram at the AA' position;

[0032] Figure 5 yes Figure 2 Another cross-sectional structural diagram at the AA' position;

[0033] Figure 6is a text flow diagram of a method for manufacturing a display panel provided by an embodiment of the present invention;

[0034] Figures 7a-7g It is a structural flow diagram of a method for manufacturing a display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0037] In this disclosure, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any embodiment described as "exemplary" in this disclosure is not necessarily to be construed as preferred or advantageous over other embodiments.

[0038] The following description is given to enable any person skilled in the art to make and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that one of ordinary skill in the art can recognize that the present invention can be practiced without using these specific details.

[0039] In the examples, well-known structures and processes will not be elaborated in detail to avoid making the description of the present invention obscure with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope consistent with the principles and features disclosed in the present invention.

[0040] See also Figure 1 The conventional display panel 20 shown in FIG. 2 includes a plurality of sub-display panels 200 (two are shown in the figure as an example) spliced in sequence.

[0041] The display device comprises a first substrate 210, a display layer 220 disposed on the first substrate 210, an encapsulation layer 240 disposed on the display layer 220, and a protective layer 230 disposed on a side of the display layer 220. The display layer 220 comprises an array driving layer 221, a plurality of display devices 222, and an encapsulation layer 223, which are sequentially disposed on the first substrate 210.

[0042] When the sub-display panels 200 are spliced together, in order to achieve a narrow frame effect, the sub-display panels 200 need to be spliced together.

[0043] The sub-display panels 200 are compactly spliced, and the protective layer 230 located on the side of the sub-display panel 200 is relatively thin and easily bumped and scratched, thereby affecting its protective performance and ultimately leading to poor display.

[0044] Based on the above problems, an embodiment of the present invention provides a display panel, which is combined with Figure 2 and Figure 3 For detailed explanation:

[0045] See Figure 1 The display panel 10 comprises a plurality of sub-display panels 100, each of which is spliced in sequence. Typically, each of the sub-display panels 100 is spliced in sequence along a first direction X or a second direction Y. The first direction X and the second direction Y form a preset angle. Since the sub-display panels 100 are generally rectangular in structure, the first direction X and the second direction Y are generally perpendicular. The figure exemplarily shows six sub-display panels 100, which are spliced in sequence in three columns along the first direction X and two rows along the second direction Y. In actual applications, a corresponding number of sub-display panels can be provided according to specific requirements and spliced in a corresponding manner to form the display panel.

[0046] 0See Figure 3 , any one of the sub-display panels 100 includes a first substrate 110 and a display layer 120 disposed on the first substrate 110;

[0047] The display layer 120 includes an array drive layer 121 disposed on the first substrate 110, a plurality of light-emitting devices 122 disposed on the array drive layer 121, and an encapsulation layer 123 disposed on the array drive layer 121 and the plurality of light-emitting devices 122. The encapsulation layer 123 completely covers each of the light-emitting devices 122 to achieve an encapsulation protection effect thereon. The array drive layer 121 includes a thin film transistor device disposed in the display area and a metal trace disposed in the frame area. A driving device is bound to at least one side of the array drive layer 121 to achieve driving and display of the sub-display panel 100. , or according to actual needs, driving devices are bound on both opposite sides of the array driving layer 121 to realize the driving display of the sub-display panel 100. Then, on the side where the binding is performed, there will be exposed metal traces in the array driving layer 121. In order to prevent the metal traces from being corroded by water and oxygen and causing poor display, the sub-display panel 100 further includes a protective layer 130. The protective layer 130 is arranged on the side of the display layer 120 along the first direction X and / or on the side opposite to the first direction X, that is, the protective layer 130 can be only arranged on the side of the display layer 120 along the first direction X, that is, as shown in FIG. Figure 4 As shown, the protective layer 130 may be disposed only on the side surface of the display layer 120 in the opposite direction of the first direction X, that is, as shown in FIG. Figure 5 As shown, the protective layer 130 may be disposed on the side of the display layer 120 along the first direction X and the side in the opposite direction of the first direction X, that is, as shown in FIG. Figure 3 As shown;

[0048] It is supplemented that the first direction is the extension direction of each data line in the array driving layer 121, and the positions where the driving devices can be bound are the two ends of each signal line along the extension direction;

[0049] The plurality of sequentially spliced sub-display panels 100 include at least two sub-display panels 100 sequentially spliced along the first direction X. In the two sub-display panels 100 spliced along the first direction X, refer to Figure 3 , the first substrate 110 of one sub-display panel 100 protrudes toward the other sub-display panel 100 compared to the display layer 120 of the sub-display panel 100, and the display layer 120 and the protective layer 130 of one sub-display panel 100 are spaced from the display layer 120 and the protective layer 130 of the other sub-display panel 100.

[0050] It is additionally noted that, in the two sub-display panels 100 spliced along the first direction X, any one of the sub-display panels 100 may be configured such that the first substrate 110 protrudes toward the other sub-display panel 100 relative to the display layer 120 of the sub-display panel 100. Figure 3 The sub-display panel 100 on the left is used as an example for explanation, and the side of the first substrate 110 is flush with the side of the display layer 120 at the adjacent side of the other sub-display panel 100 .

[0051] In the display panel provided by the present invention, in the two sub-display panels 100 spliced along the first direction X, the first substrate 110 of one sub-display panel 100 is protruded toward the other sub-display panel 100 compared to the display layer 120 of the sub-display panel 100, so that the display layer 120 and the protective layer 130 of one sub-display panel 100 are spaced from the display layer 120 and the protective layer 130 of the other sub-display panel 100. In this way, the first substrate 110 is The portion of the display layer 120 that protrudes toward the other sub-display panel 100 can play a limiting role during splicing. Even if the two sub-display panels 100 spliced along the first direction X are compactly spliced, the protective layer 130 at the splicing point will not be bumped and damaged. That is, the display panel provided by the present invention can effectively prevent the protective layer 130 located on the side of the display layer 120 from being bumped and damaged when the sub-display panels 100 are spliced, thereby preventing the problem of poor display. This improves the yield of the display panel.

[0052] In some embodiments, see Figure 3 In the two sub-display panels 100 adjacent to each other along the first direction, the first substrate 110 of one sub-display panel 100 has a first side surface 110a facing the other sub-display panel 100, and the first side surface 110a and the side surface of the first substrate 110 away from the display layer 120 form an acute angle, that is, the first side surface 110a of the first substrate 110 is tilted to achieve that the first substrate 110 of the sub-display panel 100 protrudes toward the other sub-display panel 100 compared with the display layer 120. The smaller the angle between the first side surface 110a and the side surface of the first substrate 110 away from the display layer 120, the greater the protruding distance. Here, the protruding distance d of the first substrate 110 toward the other sub-display panel 100 compared with the display layer 120 is the distance that the bottom surface of the first substrate 110 protrudes toward the other sub-display panel 100 compared with the top of the first substrate 110.

[0053] In some embodiments, see Figure 3The display layer 120 of one sub-display panel 100 has a second side surface 120a facing the other sub-display panel, the second side surface 120a is connected to the first side surface 110a, and the second side surface 120a forms an acute angle with the side surface of the display layer 120 close to the first substrate 110. That is, on the basis of the protrusion of the first substrate 110 relative to the display layer 120 toward the other sub-display panel 100, the display layer 120 is further retracted in the direction away from the other sub-display panel 100, that is, the risk of the protective layer 130 located on the side of the display layer 120 being bumped and damaged when the sub-display panels 100 are spliced, thereby further reducing the risk of poor display caused by collision.

[0054] In some embodiments, see Figure 3 Any of the sub-display panels 100 further includes a second substrate 140 disposed on a side of the display layer 120 away from the first substrate 110. In the two sub-display panels 100 spliced along the first direction X, the second substrate 140 of one sub-display panel 100 has a third side 140a facing the other sub-display panel 100, and the third side 140a forms an acute angle with the side of the second substrate 140 close to the display layer 120. The third side 140a is connected to the second side 120a, that is, the third side 140a, the second side 120a and the first side 110a have the same inclination direction and are sequentially connected to form a continuous side.

[0055] In some embodiments, see Figure 3 The third side surface 140a is coplanar with the second side surface 120a, and the second side surface 120a is coplanar with the first side surface 110a, that is, the side surface formed by the third side surface 140a, the second side surface 120a and the first side surface 110a connected in sequence is a flat inclined surface. This structure can be obtained by a simple process method. For details, please see the embodiment of the preparation method described later.

[0056] In some embodiments, see Figure 3 , the protrusion distance d of the first substrate 110 of one sub-display panel 100 relative to the display layer 120 toward the other sub-display panel 100 is greater than or equal to 5 times the thickness of the protective layer 130, so as to ensure that the protective layer 130 will not be damaged by bumps and avoid poor display.

[0057] Furthermore, the protrusion distance d of the first substrate 110 of one sub-display panel 100 from the display layer 120 toward the other sub-display panel 100 is less than or equal to 10 times the thickness of the protective layer 130, thereby ensuring that the protective layer 130 is protected from damage by bumps and still achieving an extremely narrow seam.

[0058] In some embodiments, the first substrate 110 is a base substrate, and the second substrate 140 is a transparent cover. For example, both the first substrate 110 and the second substrate 140 are made of glass substrates.

[0059] In some embodiments, the protective layer 130 at least covers the array drive layer 121 in the display layer 120. Of course, it can be appropriately extended on both sides to ensure that the protective layer 130 completely covers the exposed metal traces in the array drive layer 121. For example, one side of the protective layer 130 extends to cover a portion of the side surface of the first substrate 110, and the other side extends to cover a portion of the side surface of the second substrate 140.

[0060] In some embodiments, the thickness of the protective layer is 1-5 microns, and the material of the protective layer is parylene ([2,2]paracyclophane) or aluminum oxide.

[0061] In some embodiments, the light emitting device 122 is a micro light emitting diode, an organic light emitting diode, a quantum dot light emitting diode, or the like.

[0062] In some embodiments, the display panel further includes a carrier substrate located under the first substrate in each of the sub-display panels, for assisting in splicing and fixing the sub-display panels.

[0063] It should be noted that the above display panel embodiment only describes the above structure. It is understandable that, in addition to the above structure, the display panel of the embodiment of the present invention may also include any other necessary structures as needed, which is not specifically limited here.

[0064] Another embodiment of the present invention further provides a method for manufacturing a display panel. Figure 6 , the preparation method comprises the following steps:

[0065] S10: providing a plurality of sub-display panels, wherein any of the sub-display panels comprises a first substrate; a display layer 5 disposed on the first substrate; a protective layer disposed on a side surface of the display layer along a first direction and / or

[0066] or on a side surface in a direction opposite to the first direction;

[0067] S20: sequentially splicing the sub-display panels, wherein the plurality of sequentially spliced sub-display panels include at least two sub-display panels spliced along the first direction,

[0068] In the display panel, the first substrate of one sub-display panel protrudes toward the other sub-display panel compared to the display layer, and the display layer and the protective layer of one sub-display panel are spaced from the display layer and the protective layer of the other sub-display panel.

[0069] Combine as follows Figures 7a-7g For detailed explanation:

[0070] See also Figure 7e , providing a plurality of sub-display panels 100, any of the sub-display panels 100 includes a first substrate 110; a display layer 120, disposed on the first substrate 110; and a protective layer 130, disposed on a side surface of the display layer 120 along a first direction X and / or a side surface in a direction opposite to the first direction X. Here, the protective layer 130 is exemplarily provided on both the side surface of the display layer 120 along the first direction X and the side surface in a direction opposite to the first direction X.

[0071] See also Figure 7f , the sub-display panels 100 are spliced in sequence. Usually, the sub-display panels 100 are spliced in sequence.

[0072] The sub-display panels 100 are sequentially spliced along the first direction X or the second direction Y. The first direction X and the second direction Y form a preset angle. Since the sub-display panels 100 are generally rectangular in structure, the first direction X and the second direction Y are generally perpendicular. The figure exemplarily shows six sub-display panels 100 that are sequentially spliced in three columns along the first direction X and two rows along the second direction Y. The multiple sequentially spliced sub-display panels 100 include at least two sub-display panels 100 spliced along the first direction X.

[0073] 5See Figure 7g Shown Figure 7f In the cross-sectional structure at position BB', in the two sub-display panels 100 spliced along the first direction X, the first substrate 110 of one sub-display panel 100 protrudes toward the other sub-display panel 100 compared to the display layer 120, and the display layer 120 and the protective layer 130 of one sub-display panel 100 are spaced apart from the display layer 120 and the protective layer 130 of the other sub-display panel 100.

[0074] In some embodiments, the step of providing any one of the sub-display panels 100 in step S10 specifically includes the following:

[0075] See also Figure 7a, providing a sub-display panel to be cut, the sub-display panel comprising a first substrate 110 and a display layer 120 and a second substrate 140 disposed on the first substrate 110, the sub-display panel to be cut comprising a cutting reserved area and a cutting removal area disposed around the cutting reserved area;

[0076] See also Figure 7b , attaching a crack buffer film 300 on the side of the first substrate 110 away from the display layer 120 corresponding to the cutting reserve area;

[0077] See also Figure 7c , using a cutting wheel to cut the side of the second substrate 140 away from the display layer 120 corresponding to the edge of the crack buffer film 300 to form a cutting crack L, wherein the cutting crack L includes a first crack L1 located on one side of the first direction X, a third crack L3 located on the side opposite to the first direction X, a second crack L2 and a fourth crack L4 respectively connecting the first crack L1 and the third crack L3, wherein the orthographic projection of the first crack L1 on the crack buffer film 300 is located within the edge of the crack buffer film 300, and the orthographic projections of the second crack L2, the third crack L3, and the fourth crack L4 on the crack buffer film 300 respectively coincide with the corresponding edges of the crack buffer film 300;

[0078] Continue reading Figure 7c , the display panel to be cut is subjected to a splitting process along the cutting crack to remove the portion outside the cutting crack L, and the split buffer film 300 is peeled off, thereby obtaining a cut display panel, that is, Figure 7d As shown, during the cracking process, the side of the first substrate 110 close to the crack buffer film 300 will break along the edge of the crack buffer film 300, and the side of the second substrate 140 away from the display layer 120 will break along the cutting crack L. When the orthographic projection of the cutting crack on the crack buffer film 300 coincides with the edge of the crack buffer film 300, the side surface formed by the crack will be perpendicular to the first substrate 110, that is, the side surfaces formed along the second crack L2, the third crack L3, and the fourth crack L4 are perpendicular to the first substrate 110. Since the orthographic projection of the first crack L1 on the crack buffer film 300 is located within the edge of the crack buffer film 300, during the cracking process, the crack buffer film 300 will partially disperse the fracture stress that should be in the vertical direction to the horizontal direction, so that the side surface formed along the first crack L1 is inclined with respect to the first substrate 110, and thus, at this side surface, the first substrate 110 is convex relative to the display layer 120.

[0079] See also Figure 7eA protective layer 130 is formed on the side surface of the display layer 120 of the cut display panel along the first direction X and / or on the side surface in the direction opposite to the first direction X to obtain the sub-display panel 100.

[0080] In some embodiments, the split buffer film 300 is peeled off from the first substrate 110 through a mechanical peeling process or a laser peeling process.

[0081] In some embodiments, see Figure 7c , the orthographic projection of the first crack L1 on the crack buffer film 300 is spaced from the corresponding edge of the crack buffer film 300 by a distance w, see Figure 7d , at the side formed by the fracture of the first crack L1, the protruding distance of the end of the first substrate 110 away from the display layer 120 compared to the end of the second substrate 140 away from the display layer 120 is also the spacing w, and the spacing w is positively correlated with the protruding distance of the first substrate 110 compared to the display layer 120. According to actual needs, the spacing w is 15 to 50 μm.

[0082] In some embodiments, the fracture toughness of the crack buffer film 300 is greater than the fracture toughness of the first substrate 110 , thereby effectively causing the first substrate 110 to fracture along the edge of the crack buffer film 300 near the crack buffer film 300 .

[0083] In some embodiments, the split buffer film 300 is a polyimide film, and the thickness of the split buffer film 300 is 20-100 um.

[0084] Another embodiment of the present invention further provides a display device, which includes the display panel provided by the above embodiment. The display device includes but is not limited to a mobile phone, a smart watch, a tablet computer, a laptop computer, a television, etc.

[0085] The above is a detailed introduction to a display panel, a preparation method, and a display device provided by an embodiment of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, based on the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A display panel, characterized in that: The display panel includes a plurality of sub-display panels spliced in sequence, and any one of the sub-display panels includes: a first substrate; a display layer disposed on the first substrate, the display layer of the sub-display panel having a second side surface facing the other sub-display panel, the second side surface forming an acute angle with a side surface of the display layer close to the first substrate; a protective layer, disposed on a side surface of the display layer along a first direction and / or a side surface along a direction opposite to the first direction; A plurality of sub-display panels spliced in sequence include at least two sub-display panels spliced along the first direction. In the two sub-display panels spliced along the first direction, the first substrate of one sub-display panel protrudes toward the other sub-display panel compared to the display layer, and the display layer and protective layer of one sub-display panel are spaced from the display layer and protective layer of the other sub-display panel.

2. The display panel according to claim 1, wherein: In the two adjacent sub-display panels along the first direction, the first substrate of one sub-display panel has a first side surface facing the other sub-display panel, and the first side surface forms an acute angle with a side surface of the first substrate away from the display layer.

3. The display panel according to claim 2, wherein: The first side surface is connected to the second side surface.

4. The display panel according to claim 3, wherein: Any of the sub-display panels also includes a second substrate arranged on the side of the display layer away from the first substrate. In the two sub-display panels adjacent to each other along the first direction, the second substrate of one sub-display panel has a third side facing the other sub-display panel, and the third side forms an acute angle with the side of the second substrate close to the display layer, and the third side is connected to the second side.

5. The display panel according to claim 4, wherein: The third side surface is coplanar with the second side surface, and the second side surface is coplanar with the first side surface.

6. The display panel according to claim 1, wherein: A protrusion distance of the first substrate of one sub-display panel from the display layer toward the other sub-display panel is greater than or equal to 5 times the thickness of the protective layer.

7. A method for preparing a display panel, characterized in that: The preparation method comprises the following steps: S10: Providing a plurality of sub-display panels, wherein any one of the sub-display panels comprises a first substrate; a display layer disposed on the first substrate, the display layer of the sub-display panel having a second side surface facing another sub-display panel, the second side surface forming an acute angle with a side surface of the display layer close to the first substrate; and a protective layer disposed on a side surface of the display layer along a first direction and / or a side surface of the display layer in a direction opposite to the first direction; S20: Splice each of the sub-display panels in sequence, and the multiple sub-display panels spliced in sequence include at least two sub-display panels spliced along the first direction. In the two sub-display panels spliced along the first direction, the first substrate of one sub-display panel protrudes toward the other sub-display panel compared to the display layer, and the display layer and protective layer of one sub-display panel are spaced from the display layer and protective layer of the other sub-display panel.

8. The method for manufacturing a display panel according to claim 7, wherein: The step of providing any one of the sub-display panels in step S10 specifically includes: Providing a sub-display panel to be cut, the sub-display panel comprising a first substrate, a display layer and a second substrate disposed on the first substrate; attaching a crack buffer film on a side of the first substrate away from the display layer; Cutting a crack on a side of the second substrate away from the display layer corresponding to an edge of the crack buffer film, wherein the crack includes a first crack located on one side of the first direction, and an orthographic projection of the first crack on the crack buffer film is located within the edge of the crack buffer film; performing a splitting process on the sub-display panel to be cut along the cutting crack to remove a portion outside the cutting crack to obtain a cut display panel; A protective layer is formed on a side surface of the display layer of the cut display panel along a first direction and / or a side surface along a direction opposite to the first direction to obtain the sub-display panel.

9. The method for manufacturing a display panel according to claim 8, wherein: The fracture toughness of the crack buffer film is greater than the fracture toughness of the first substrate.

10. A display device, characterized in that: The display device comprises the display device according to any one of claims 1 to 6.

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