Display panel, manufacturing method thereof and mobile terminal

Abstract

The embodiment of the application discloses a display panel, a manufacturing method thereof and a mobile terminal. The display panel comprises a preset curved display part, and the curved display part comprises a plurality of display sub-layers which are stacked along a first direction. The area of the plurality of display sub-layers decreases in sequence from a direction away from a plane display part to a direction close to the plane display part, and the outer contour of the display sub-layer close to the plane display part is within the outer contour of the display sub-layer away from the plane display part. The display sub-layer comprises a substrate layer and a display device layer. The plurality of substrate layers are stacked, and the adjacent two substrate layers are partially overlapped. The plurality of substrate layers have a multi-stage ladder structure, and one display device layer is arranged on one step, so that the edge contour of the plurality of display device layers has a preset curved surface. The technical scheme of the application can make the display panel have a complex curved surface, avoid the problem that the forming curved surface screen of the top pin is limited by the stress area, and the curved surface shape range of the obtained curved surface display panel is wider, and the yield rate of the finished product is higher.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display panel and its manufacturing method, and a mobile terminal. Background Technology

[0002] Currently, conventional OLED quad-curved molding is achieved by lifting and molding a silicone substrate with minimal redundancy. The final shape is limited by the angle of the quad-curved molding and the properties of the panel itself. Furthermore, issues such as air bubbles and poor adhesion can easily occur during the molding process. These problems make it difficult for OLED screens to form various complex curved shapes. Compared with existing flexible curved OLED displays, Micro LED stretchable screens offer greater freedom and room for development. Due to their unique and superior stretchability, Micro LED display panels can achieve lifting and stretching molding of various complex curved surfaces.

[0003] In existing technologies, the forming of Micro LED stretchable screens is controlled by a pin, which can lift and stretch the screen in any direction along the Z-axis. The Z-axis displacement of the pin can control the Z-axis of each point on the screen. However, the forming of the pin is limited by the force-bearing area, which makes the display panel prone to problems such as indentation and poor adhesion. Summary of the Invention

[0004] This application provides a display panel and its manufacturing method, as well as a mobile terminal, which can make the display panel have a curved display part with a complex curved surface on the periphery. This avoids the problem of traditional pin-formed curved screens being limited by the force-bearing area. The resulting curved display panel has a wider range of curved shape selection and a higher yield rate.

[0005] This application provides a display panel, which includes a flat display portion and a curved display portion located around the periphery of the flat display portion. The curved display portion has a contour of a predetermined curved surface, and the curved display portion further includes:

[0006] The display sublayers are stacked along a first direction, which is perpendicular to the planar display portion. The area of ​​the display sublayers decreases sequentially from the direction away from the planar display portion to the direction closer to the planar display portion. In the display sublayers, the projection of the outer contour of the display sublayer closer to the planar display portion is located within the outer contour of the display sublayer away from the planar display portion.

[0007] Each of the display sub-layers includes a substrate layer and a display device layer disposed on the substrate layer. A display device layer includes multiple display devices. The multiple substrate layers of the multiple display sub-layers are stacked, and any two adjacent substrate layers partially overlap. The multiple substrate layers have a stepped structure with multiple steps. A display device layer is disposed on each step so that the edge contour of the multiple display device layers is a preset curved surface.

[0008] Optionally, in the display sublayer, the thickness of the substrate layer is less than or equal to the thickness of the display device layer in the first direction.

[0009] Optionally, the display panel includes a driving motherboard, and a plurality of display devices in the display device layer are connected through a control circuit, and the plurality of control circuits are electrically connected to the driving motherboard.

[0010] Optionally, the substrate layer may be made of a photocurable transparent optical adhesive.

[0011] Optionally, in two adjacent display sub-layers, they are located on two different substrate layers, and the spacing between two adjacent display devices in the second direction is 0um to 27um, and the second direction is perpendicular to the first direction.

[0012] Optionally, in the direction from the edge of the display panel to the center of the display panel, the spacing between two display devices located on adjacent substrate layers and disposed adjacently in the second direction gradually increases in the multilayer display sublayers.

[0013] Optionally, the planar display unit includes a top substrate layer and a planar display device layer disposed on the top substrate layer; the periphery of the top substrate layer is connected to the display sublayer of the multiple display sublayers that is closest to the planar display unit.

[0014] Optionally, the planar display device layer includes a plurality of uniformly spaced display devices, wherein the spacing between any two adjacent display devices is less than or equal to 27 μm.

[0015] Furthermore, this application embodiment also provides a method for manufacturing a display panel, including the following steps:

[0016] Multiple display sub-layers with gradually decreasing areas are sequentially formed along a first direction. The multiple display sub-layers are stacked. Forming the display sub-layer includes providing a substrate layer and forming a display device layer on the substrate layer. Each display device layer includes multiple display devices. The multiple substrate layers of the multiple display sub-layers are stacked, and any two adjacent substrate layers partially overlap. The multiple substrate layers have a stepped structure with multiple steps. A display device layer is disposed on each step so that the edge contour of the multiple display device layers has a preset curved surface, resulting in a curved display portion.

[0017] A flat display section is formed, and the periphery of the flat display section is connected to the inner side of the curved display section.

[0018] This application also provides a mobile terminal, including the display panel described in any of the above embodiments.

[0019] The beneficial effects of this invention include at least the following:

[0020] The display panel includes a flat display section and a curved display section located around the flat display section. The curved display section has a pre-defined curved surface outline. The curved display section also includes multiple display sub-layers, which are stacked along a first direction. The area of ​​each display sub-layer decreases sequentially from the direction away from the flat display section to the direction closer to the flat display section. Furthermore, the projection of the outer contour of one display sub-layer closer to the flat display section lies within the outer contour of another display sub-layer away from the flat display section. Each display sub-layer includes a substrate layer and a display device layer disposed on the substrate layer. A display device layer includes multiple display devices. The multiple substrate layers of the multiple display sub-layers are stacked, with any two adjacent substrate layers partially overlapping, such that the multiple substrate layers... The layers have a stepped structure with multiple steps, and a display device layer is set on each step so that the edge contour of the multi-layer display device layer is a preset curved surface. By using a multi-layer display sub-layer stacking method, the multi-layer substrate is stacked to form a multi-level stepped structure. A display device layer is set on each step, and the edge contour of the multi-layer display device layer is a preset curved surface. The contour of the preset curved surface can be preset by the program. By controlling the spacing between the outer contours of two adjacent display sub-layers and the thickness of the display sub-layers, the edge contour of the multi-layer display device layer matches the contour of the preset curved surface. This avoids the problem of traditional pin-formed curved screens being limited by the force-bearing area, resulting in a wider range of curved surface selection for the formed curved display panel and a higher yield rate. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the display panel provided in an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of a multi-layer display sub-layer stacking structure in a display panel provided in an embodiment of this application;

[0024] Figure 3 This is a side view of a multi-layer display sub-layer stacked structure in a display panel provided in an embodiment of this application.

[0025] Figure 4 This is a schematic diagram of the structure of a third display sublayer in a display panel provided in an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the structure of the eighth display sub-layer in a display panel provided in an embodiment of this application;

[0027] Figure 6 This is a schematic diagram of the structure of a display panel with a vertically unstacked display sublayer and a planar display section provided in an embodiment of this application;

[0028] Figure 7 This is a schematic diagram of a display panel stacked to a third display sublayer according to an embodiment of this application;

[0029] Figure 8 This is a schematic diagram of another display panel stacked to the eighth display sub-layer provided in this application embodiment;

[0030] Figure 9 This is a schematic cross-sectional view of a curved display portion of a display panel provided in an embodiment of this application;

[0031] Figure 10 This is a schematic diagram of the process of pressing a display panel and a cover plate together, provided in an embodiment of this application;

[0032] Figure 11 This is a schematic diagram of a display panel manufacturing apparatus provided in an embodiment of this application;

[0033] Figure 12 This is a schematic diagram illustrating the working principle of a display panel molding device provided in an embodiment of this application;

[0034] Figure 13This is a schematic diagram of the structure of a display panel and a cover plate after being pressed together, according to an embodiment of this application;

[0035] Figure 14 This is a schematic diagram of the structure of a display panel and a driver chip provided in an embodiment of this application;

[0036] Figure 15 This is a schematic diagram illustrating the manufacturing process of a display panel according to an embodiment of this application. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] This application provides a display panel, a method for manufacturing the display panel, and a mobile terminal. These are described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments. Furthermore, in the description of this application, the term "comprising" means "including but not limited to". The terms first, second, third, etc., are used merely as illustrative and do not impose numerical requirements or establish an order. Various embodiments of the present invention may exist in the form of a range; it should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of the present invention; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single digits within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. Additionally, whenever a numerical range is indicated herein, it means including any referenced number (fraction or integer) within the indicated range.

[0039] This application provides a display panel, such as... Figures 1-14 As shown, the display panel includes a flat display portion A1 and a curved display portion A2 located around the flat display portion A1. The curved display portion A2 has a contour with a predetermined curved surface s1. The curved display portion A2 also includes:

[0040] The multi-layer display sub-layer 10G is stacked along a first direction F1, which is perpendicular to the flat display unit A1. The area of ​​the multi-layer display sub-layer 10G decreases sequentially from the direction away from the flat display unit A1 to the direction closer to the flat display unit A1. In the multi-layer display sub-layer 10G, the projection of the outer contour of the display sub-layer 10G that is closer to the flat display unit A1 is located within the outer contour of the display sub-layer 10G that is away from the flat display unit A1.

[0041] Each of the display sub-layers 10G includes a substrate layer 102 and a display device layer 101 disposed on the substrate layer 102. Each display device layer 101 includes a plurality of display devices 1011. The multiple substrate layers 102 of the multiple display sub-layers 10G are stacked, and any two adjacent substrate layers 102 partially overlap. The multiple substrate layers 102 have a stepped structure with multiple steps S1. A display device layer 101 is disposed on each step S1, so that the edge contour of the multiple display device layers 101 forms the preset curved surface sl.

[0042] Specifically, such as Figure 1 As shown, the display panel can be a four-curved display panel, including a flat display part A1 and a curved display part A2 located on its periphery and curved in different directions. The display panel can be a Micro LED display panel.

[0043] Specifically, the outline of the curved display portion A2 of the display panel can be a preset curved surface sl. The curved surface can be a regular curved surface, that is, having one or more bending directions, or it can be an irregular irregular curved surface, specifically a Gaussian surface. This application does not impose any specific limitations.

[0044] Specifically, the curved display section A2 includes multiple display sub-layers 10G, which are stacked together. In this embodiment, the curved display section A2 includes at least four sub-sections, each with a different bending direction.

[0045] Specifically, such as Figure 2 and Figure 3 As shown, the display sublayer 10G includes a substrate layer 102 and a display device layer 101 disposed on the substrate layer 102. The display device layer 101 includes a plurality of display devices 1011. The specific arrangement of the display devices 1011 and the substrate layer 102 is that the substrate layer 102 has vias or grooves corresponding to the display devices 1011, and the display devices 1011 are fixed to the substrate layer 102 through the vias or grooves.

[0046] Specifically, the substrate 102 is made of photocurable adhesive, and the manufacturing process of the display sub-layer 10G is as follows: first, the display device 1011 is laid out according to the pre-designed display sub-layer 10G; then, photocurable adhesive is poured around the display device 1011; after curing with ultraviolet light, the excess photocurable adhesive and display device 1011 are cut off.

[0047] Specifically, in this embodiment, one of the display sublayers 10G is a square frame, for example, Figure 4 The third layer displays a 10G sublayer structure. Figure 5 This is the structure of the eighth layer, which is a 10G sublayer.

[0048] Specifically, in the first direction F1, the thickness of the substrate layer 102 is less than or equal to the thickness of the display device 1011, so as to avoid the photocurable adhesive affecting the normal display of the display device 1011.

[0049] It should be noted that the first direction F1 is the direction from the backlight surface of the display panel toward the light-emitting surface of the display panel, and the first direction F1 is perpendicular to the flat display part A1.

[0050] Specifically, such as Figure 6 , Figure 7 and Figure 8 As shown, Figure 6 This is a schematic diagram illustrating the stacking arrangement of the multi-layer display sublayer 10G and the flat panel display unit A1. Figure 7 This is a schematic diagram of the display panel structure stacked to the third display sublayer 10G. Figure 8 This is a schematic diagram of a display panel structure stacked up to the eighth layer. Multiple display sub-layers 10G are stacked, and the area of ​​each display sub-layer 10G is different. In the first direction F1 (i.e. from the backlight surface of the display panel to the light-emitting surface), the area of ​​the display sub-layer 10G gradually decreases.

[0051] Specifically, such as Figure 6 , Figure 7 and Figure 8 As shown, the multi-layer display sub-layers 10G are stacked, with the larger display sub-layer 10G located on the lower layer and the smaller display sub-layer 10G located on the upper layer. In two adjacent display sub-layers 10G, the outer contour of the smaller display sub-layer 10G is located within the outer contour of the larger display sub-layer 10G.

[0052] Specifically, any two adjacent display sub-layers 10G are stacked, and the substrate layers 102 of the two adjacent display sub-layers 10G partially overlap. Specifically, the portion of the substrate layer 102 of the lower display sub-layer 10G near the center of the display panel coincides with the portion of the substrate layer 102 of the upper display sub-layer 10G near the edge of the display panel, forming a stepped S1 structure (similar to a Z-shape). Figure 9As shown, "lower layer" and "upper layer" refer to the layers formed first in the manufacturing process, located in the lower layer and formed later, located in the upper layer; the multiple display sub-layers 10G are stacked so that the multiple substrate layers 102 form a stepped structure with multiple steps S1. The corresponding display device layer 101 on the substrate layer 102 is disposed on the light-emitting surface of the substrate layer 102 facing the display panel and forming the step S1.

[0053] Specifically, after the multilayer substrate layer 102 forms a stepped structure with multiple steps S1, the outer contour of the multiple steps S1 forms a curved surface, which is the same as the preset curved surface sl of the curved display part A2. The display device layer 101 is disposed on the corresponding step S1, so that the edge contour of the multilayer display device layer 101 also presents the preset curved surface sl.

[0054] It is understandable that the contour of the curved display section A2 required by the curved display panel (i.e., the preset curved surface sl) is determined in advance by the program. Then, the dimensions of the multi-layer substrate layer 102 in the multi-layer display sub-layer 10G are adjusted, including the height of the substrate layer 102 and the width of the step S1 formed by two adjacent substrate layers 102 (i.e., the distance between the outer contours of two adjacent substrate layers 102). Then, the display device layer 101 is set on the corresponding step S1, so that the edge contour of the multi-layer display device layer 101 matches the contour of the preset curved surface sl, forming a curved display section A2 with the preset curved surface sl. The method of stacking the display sub-layer 10G avoids the problem of the traditional pin-formed curved screen being limited by the force area, so that the curved display panel has a wider range of curved surface selection and a higher yield.

[0055] In one embodiment, in the display sub-layer 10G, in the first direction F1, the thickness of the substrate layer 102 is less than or equal to the thickness of the display device layer 101.

[0056] Specifically, in the first direction F1, the multiple substrate layers 102 can have different thicknesses, which need to be adjusted according to the actual production situation and the specific division of the preset curved surface sl of the curved display part A2 of the display panel.

[0057] Specifically, the thickness of the substrate layer 102 can be 10 μm to 30 μm, for example, it can be any one of 10 μm, 12 μm, 14 μm, 15 μm, 18 μm, 20 μm, 26 μm, 28 μm, and 30 μm, preferably 20 μm.

[0058] Specifically, the thickness of the display device 1011 can be 20um to 30um, for example, it can be any one of 20um, 22um, 23um, 24um, 25um, 28um, and 30um.

[0059] Specifically, since the substrate layer 102 is formed by pouring, curing and cutting photocurable adhesive in this embodiment, the thickness of the photocurable adhesive poured into the substrate layer 102 during its formation is preferably less than or equal to the thickness of the display device 1011, so as to avoid affecting the normal display of the display device 1011.

[0060] Specifically, in the process of pouring, curing, and cutting the photocurable adhesive to form the substrate layer 102, the outer contour is pre-cut. After all the display sub-layers 10G and the flat panel display A1 are stacked, the inner contour of the substrate layer 102 is laser-cut to ensure that the multilayer display sub-layers 10G have better stability during the stacking process.

[0061] Specifically, the substrate layer 102 can be made of a transparent material, such as OCR adhesive.

[0062] It is understood that by limiting the thickness of the substrate layer 102 to be less than or equal to the thickness of the display device layer 101, the display device 1011 can be unaffected by the material of the substrate layer 102, thus ensuring light extraction efficiency.

[0063] In one embodiment, such as Figure 2 , Figure 3 , Figure 13 and Figure 14 As shown, the display panel includes a driving motherboard 40, and a plurality of display devices 1011 of the display device layer 101 are connected through a control circuit 30. The plurality of control circuits 30 are electrically connected to the driving motherboard 40.

[0064] Specifically, in this embodiment, each display device layer 101 in each display sub-layer 10G is a separate control circuit 30, the display devices 1011 in the display device layer 101 are arranged at intervals, and different display devices 1011 are electrically connected. The control circuits 30 of different display device layers 101 are arranged independently, and multiple control circuits 30 are all connected to a driving motherboard 40.

[0065] Specifically, Figure 2 , Figure 3 The location of the drive motherboard 40 is only an example and is not limited to the side of the curved display section A2. In this example, multiple control circuits 30 are connected to the drive motherboard 40 after converging on a nearby side. The drive motherboard 40 is located on one side of the backlight surface of the display panel.

[0066] Specifically, the control circuit 30 is mesh-like, and the display device 1011 is located at the nodes of the mesh structure.

[0067] It is understandable that by setting the display device layer 101 in the single-layer display sub-layer 10G to be controlled by a control circuit 30, the manufacturing of the display panel is facilitated, the manufacturing process of the display panel is reduced, and subsequent testing is convenient.

[0068] In one embodiment, the substrate 102 is made of a photocurable transparent optical adhesive.

[0069] Specifically, the material of the substrate layer 102 can be optically clear resin (OCR), which is a special adhesive mainly used for bonding transparent optical components.

[0070] It is understandable that by setting the material of the substrate layer 102 to OCR, it has strong applicability, strong fluidity of liquid adhesive, good gap filling, high adhesion rate, strong bonding stability, and little influence of temperature on bonding. The material is transparent and does not affect the light emission display of the display device 1011.

[0071] In one embodiment, two adjacent display sub-layers 10G are located on two different substrate layers 102, and the distance d between two adjacent display devices 1011 in the second direction F2 is 0um to 27um, and the second direction F2 is perpendicular to the first direction F1.

[0072] Specifically, such as Figure 3 As shown, the spacing d between two adjacent display devices 1011 in the second direction F2 can be any one of 0, 5um, 12um, 20um, 25um, or 27um.

[0073] Specifically, in the multilayer display sublayer 10G, the distance d between two adjacent display devices 1011 located on two different substrate layers 102 in the second direction F2 is multiple, and the values ​​can be equal or unequal, and can be adjusted according to the actual production situation.

[0074] Understandably, by limiting the pitch d to the range of 0~27um, the display effect of the curved display section A2 of the display panel is improved.

[0075] Following the above embodiments, as Figure 3 As shown, in the direction from the edge of the display panel to the center of the display panel, in the multiple display sub-layers 10G, the distance d between two display devices 1011 located on two adjacent substrate layers 102 and arranged adjacently gradually increases in the second direction F2.

[0076] Specifically, the spacing d in the curved display section A2 is smaller than the spacing between any two adjacent display devices 1011 in the flat display section A1.

[0077] It is understandable that a four-curved display screen is usually set to reduce the screen ratio of the display panel. By setting multiple display sub-layers 10G, the distance between two adjacent display devices 1011 located on two adjacent substrate layers 102 and arranged adjacently in the second direction F2 gradually increases, making the image transition between the curved display part A2 and the flat display part A1 of the display panel more natural, the degree of image distortion is lower, and the display effect of the display panel is improved.

[0078] In one embodiment, such as Figure 4 and Figure 6 As shown, the flat panel display unit A1 includes a top substrate layer and a flat panel display device layer disposed on the top substrate layer; the periphery of the top substrate layer is connected to the display sub-layer 10G of the multiple display sub-layers 10G that is close to the flat panel display unit A1.

[0079] Specifically, the material of the top substrate layer is the same as that of the substrate layer 102, and the side of the top substrate layer facing the backlight surface partially overlaps with the substrate layer 102 of the display sub-layer 10G that is closest to it, so that the flat display part A1 is connected to the curved display part A2.

[0080] Specifically, the planar display device layer 101 includes a plurality of display devices 1011, which are evenly spaced apart.

[0081] As described in the above embodiments, the planar display device layer 101 includes a plurality of uniformly spaced display devices 1011, and the spacing between any two adjacent display devices 1011 is less than or equal to 27 μm.

[0082] Specifically, the size of the display device 1011 in the planar display device layer 101 can be 50 μm, and the spacing between two adjacent display devices 1011 can be 25 μm.

[0083] Specifically, the distance between two adjacent display devices 1011 of the curved display section A2 is smaller than the distance between two adjacent display devices 1011 of the flat display section A1.

[0084] It is understandable that by limiting the distance between two adjacent display devices 1011, the display effect of the display panel can be effectively improved.

[0085] Furthermore, embodiments of this application also provide a method for manufacturing a display panel, such as... Figure 15 As shown, it includes the following steps:

[0086] S1. Multiple display sub-layers 10G with gradually decreasing areas are sequentially formed along the first direction F1. The multiple display sub-layers 10G are stacked. Forming the display sub-layer 10G includes providing a substrate layer 102. A display device layer 101 is formed on the substrate layer 102. Each display device layer 101 includes multiple display devices 1011. The multiple substrate layers 102 of the multiple display sub-layers 10G are stacked. Any two adjacent substrate layers 102 partially overlap. The multiple substrate layers 102 have a stepped structure with multiple steps S1. A display device layer 101 is disposed on each step S1 so that the edge contour of the multiple display device layers 101 is a preset curved surface sl, resulting in a curved display portion A2.

[0087] S2. A flat display section A1 is formed, wherein the periphery of the flat display section A1 is connected to the inner side of the curved display section A2.

[0088] Specifically, the substrate 102 can be made of OCR material, and the display device 1011 can be a Micro LED.

[0089] Specifically, each display device layer 101 in each display sub-layer 10G is a separate control circuit 30. The display devices 1011 in the display device layer 101 are arranged at intervals and different display devices 1011 are electrically connected. The control circuits 30 of different display device layers 101 are set independently to each other, and multiple control circuits 30 are all connected to a driving motherboard 40.

[0090] It is understood that by setting the display panel to include a flat display section A1 and a curved display section A2 located around the flat display section A1, the curved display section A2 has a contour of a preset curved surface sl, and the curved display section A2 also includes multiple display sub-layers 10G, which are stacked along the first direction F1; in the direction from away from the flat display section A1 to near the flat display section A1, the area of ​​the multiple display sub-layers 10G decreases sequentially, and in the multiple display sub-layers 10G, the projection of the outer contour of a display sub-layer 10G near the flat display section A1 is located within the outer contour of another display sub-layer 10G away from the flat display section A1; each display sub-layer 10G includes a substrate layer 102 and a display device layer 101 disposed on the substrate layer 102, and a display device layer 101 includes multiple display devices 1011; the multiple substrate layers 102 of the multiple display sub-layers 10G are stacked, and any two adjacent substrate layers 102 are stacked together. The substrate layers 102 partially overlap, resulting in a stepped structure with multiple steps S1. A display device layer 101 is disposed on each step S1, so that the edge contour of the multi-layer display device layer 101 is a preset curved surface sl. By using a multi-layer display sub-layer 10G stacking method, the multi-layer substrate stacked together forms a multi-level stepped structure. A display device layer 101 is disposed on each step S1, and the edge contour of the multi-layer display device layer 101 is a preset curved surface sl. The contour of the preset curved surface sl can be preset by the program. By controlling the spacing between the outer contours of two adjacent display sub-layers 10G and the thickness of the display sub-layer 10G, the edge contour of the multi-layer display device layer 101 matches the contour of the preset curved surface sl. This avoids the problem of traditional pin-formed curved screens being limited by the force-bearing area, resulting in a wider range of curved surface selection for the formed curved display panel and a higher yield rate.

[0091] In one instance, such as Figure 11 and Figure 12 As shown, the display panel can be produced using a computer-controlled paper lamination technology production device;

[0092] Computer-controlled paper lamination technology production equipment includes: a human-computer interaction system (corresponding to...) Figure 12 Human-computer interaction and control system (corresponding) Figure 12 The control module in the middle), translation drive system (corresponding to) Figure 12 Translation mechanism and drive mechanism), curing system (corresponding to) Figure 12 UV curing lamps and cutting systems (corresponding to) Figure 12 (laser cutter in the middle)

[0093] Specifically, the human-computer interaction system is used to display 3D models and 2D images of the display panel for input requirements;

[0094] The control module is used to control the machine through a human-machine interface.

[0095] Translation drive system for moving the UV curing lamp 70 and the laser cutter 60;

[0096] The curing system includes a UV curing lamp 70 for curing the OCR adhesive to fix the shape of the substrate layer 102;

[0097] The cutting system is used to remove excess OCR and LED materials, that is, to cut out the outer and inner contours of the substrate layer 102.

[0098] The specific production process is as follows:

[0099] A display device layer 101 (Micro LED panel, each Micro LED is approximately 50μm in size) is provided, and the display device layer 101 is aligned and bonded using markings;

[0100] After confirming that the display device layer 101 is not warped, add the OCR photocurable liquid adhesive into the graphite box. The OCR adhesive 102p should just submerge the display device layer 101, but not exceed the thickness of the display device layer 101.

[0101] After confirming that the OCR adhesive 102p is immersed in the display device layer 101 (i.e., in contact with all light-emitting devices), the desired pattern is input through the human-machine interaction system, and the control system drives the X / Y axis servo motor and UV curing lamp 70 to irradiate and cure according to the desired pattern trajectory. After curing, vacuum degassing is performed.

[0102] After curing, the laser cutter 60 is opened, and the OCR adhesive 102p is cut and removed according to the required pattern boundary by a certain distance to obtain the first display sublayer 10G;

[0103] The above steps are repeated multiple times on the first display sublayer 10G until the fabrication of the curved display section A2 and the flat display section A1 are completed (e.g., Figure 11 (As shown, this is a schematic diagram of the operation of the first layer).

[0104] like Figure 10 As shown, the glass cover plate 20 is bonded using OCR, and then the panel is pressed firmly against the glass cover plate 20 using rollers 50, pressure is maintained, and bubbles are removed.

[0105] This application also provides a mobile terminal, including the display panel described in any of the above embodiments.

[0106] Specifically, mobile terminals include, but are not limited to, the following types: rollable or foldable mobile phones, watches, wristbands, televisions or other wearable display or touch electronic devices, as well as flexible smartphones, tablets, laptops, desktop monitors, televisions, smart glasses, smartwatches, ATMs, digital cameras, automotive displays, medical displays, industrial control displays, e-readers, electrophoretic display devices, game consoles, transparent displays, double-sided displays, glasses-free 3D displays, mirror display devices, and semi-reflective and semi-transparent display devices.

[0107] In summary, by setting the display panel to include a flat display section A1 and a curved display section A2 located around the flat display section A1, the curved display section A2 has a contour of a preset curved surface sl, and the curved display section A2 also includes multiple display sub-layers 10G, which are stacked along the first direction F1; in the direction from away from the flat display section A1 to near the flat display section A1, the area of ​​the multiple display sub-layers 10G decreases sequentially, and in the multiple display sub-layers 10G, the projection of the outer contour of a display sub-layer 10G near the flat display section A1 is located within the outer contour of another display sub-layer 10G away from the flat display section A1; each display sub-layer 10G includes a substrate layer 102 and a display device layer 101 disposed on the substrate layer 102, and a display device layer 101 includes multiple display devices 1011; the multiple substrate layers 102 of the multiple display sub-layers 10G are stacked, and any two adjacent substrates The layers 102 partially overlap, resulting in a stepped structure with multiple steps S1. A display device layer 101 is disposed on each step S1, so that the edge contour of the multi-layer display device layer 101 is a preset curved surface sl. By using a multi-layer display sub-layer 10G stacking method, the multi-layer substrate stacked together forms a multi-level stepped structure. A display device layer 101 is disposed on each step S1, and the edge contour of the multi-layer display device layer 101 is a preset curved surface sl. The contour of the preset curved surface sl can be preset by the program. By controlling the spacing between the outer contours of two adjacent display sub-layers 10G and the thickness of the display sub-layer 10G, the edge contour of the multi-layer display device layer 101 matches the contour of the preset curved surface sl. This avoids the problem of traditional pin-formed curved screens being limited by the force-bearing area, resulting in a wider range of curved surface selection for the formed curved display panel and a higher yield rate.

[0108] The above provides a detailed description of a display panel, a method for manufacturing the display panel, and a mobile terminal provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display panel, characterized by, The display panel comprises a planar display part and a curved display part located at the periphery of the planar display part, the curved display part has a preset curved surface, and the curved display part further comprises: a plurality of display sub-layers, the plurality of display sub-layers are arranged in a stack along a first direction, the first direction is perpendicular to the planar display part, in a direction from the periphery of the planar display part to the center of the planar display part, the area of the plurality of display sub-layers gradually decreases, and the projection of the outer contour of a display sub-layer close to the planar display part is located within the outer contour of another display sub-layer away from the planar display part; each display sub-layer comprises a substrate layer and a display device layer provided on the substrate layer, and one display device layer comprises a plurality of display devices; wherein the plurality of substrate layers of the plurality of display sub-layers are arranged in a stack, any two adjacent substrate layers partially overlap, the plurality of substrate layers have a stepped structure with a plurality of steps, and one display device layer is arranged on one step, so that the edge contour of the plurality of display device layers has the preset curved surface.

2. The display panel of claim 1, wherein, In the first direction, the thickness of the substrate layer is less than or equal to the thickness of the display device layer.

3. The display panel of claim 1, wherein, The display panel comprises a driving main board, and a plurality of display devices of one display device layer are connected through a control circuit, and a plurality of control circuits are electrically connected to the driving main board.

4. The display panel of claim 1, wherein, The material of the substrate layer comprises light-cured transparent optical glue.

5. The display panel of claim 1, wherein, In the second direction, the distance between the two adjacent display devices on the two different substrate layers is 0um-27um, and the second direction is perpendicular to the first direction.

6. The display panel of claim 5, wherein, In the direction from the edge of the display panel to the center of the display panel, the distance between the two adjacent display devices on the two adjacent substrate layers gradually increases in the second direction.

7. The display panel of claim 1, wherein, The planar display part comprises a top substrate layer and a planar display device layer provided on the top substrate layer; the periphery of the top substrate layer is connected to the display sub-layer close to the planar display part in the plurality of display sub-layers.

8. The display panel of claim 7, wherein, The planar display device layer comprises a plurality of display devices with uniform spacing, and the distance between any two adjacent display devices is less than or equal to 27um.

9. A manufacturing method of a display panel, comprising: The method comprises the following steps: forming a plurality of display sub-layers with gradually decreasing areas in a first direction, the plurality of display sub-layers are arranged in a stack, forming the display sub-layers comprises providing a substrate layer, forming a display device layer on the substrate layer, one display device layer comprises a plurality of display devices, the plurality of substrate layers of the plurality of display sub-layers are arranged in a stack, any two adjacent substrate layers partially overlap, the plurality of substrate layers have a stepped structure with a plurality of steps, one display device layer is arranged on one step, so that the edge contour of the plurality of display device layers has a preset curved surface, and a curved display part is obtained; forming a planar display part, and connecting the periphery of the planar display part to the inner side of the curved display part.

10. A mobile terminal, characterized by The display panel comprises any one of claims 1-8.

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