Display panel, manufacturing method thereof and display device

Abstract

The application discloses a display panel, a manufacturing method thereof and a display device. The display panel comprises: display islands arranged in an array and a stretchable trace; any two adjacent display islands are connected through at least one stretchable trace; wherein the stretchable trace comprises first branch lines and second branch lines arranged alternately, and the first branch lines are rotationally connected with the second branch lines; the first branch line or the second branch line arranged at the head end of the stretchable trace extends to the display island area, and the first branch line or the second branch line arranged at the tail end of the stretchable trace extends to the display island area. The scheme can improve the problem of trace breakage caused by too large stretching distance, improve the stretching rate of the display panel, and prolong the service life of the display panel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel, a manufacturing method thereof and a display device. BACKGROUND

[0002] As a form of wearable display, stretchable display has attracted more and more attention, and is an important frontier research direction of next-generation display technology.

[0003] Most of the current stretchable display products adopt island-bridge structure, which can maximize the stretchability. However, in the process of stretching, the stretching distance is not easy to control, and the stretching distance is easy to be too large, which causes the wire to break, resulting in product failure. SUMMARY

[0004] The present application provides a display panel, a manufacturing method thereof and a display device, which can improve the problem of wire breakage caused by too large stretching distance, improve the stretchability of the display panel, and prolong the service life of the display panel.

[0005] According to an aspect of the present application, a display panel is provided, comprising: display islands arranged in an array and stretchable wires; any two adjacent display islands are connected by at least one stretchable wire.

[0006] The stretchable wire comprises first branches and second branches arranged alternately, and the first branches are rotationally connected with the second branches.

[0007] The first branch or the second branch arranged at the first end of the stretchable wire extends to the display island region, and the first branch or the second branch arranged at the second end of the stretchable wire extends to the display island region.

[0008] The display panel as above, optionally, the second branch is arranged on one side of the first branch; the first branch has a first surface on the side close to the second branch, and the second branch has a second surface on the side close to the first branch, and the first surface and the second surface are partially in contact.

[0009] Preferably, the stretchable wire is arranged along the stretching direction of the display panel, and the stretching direction comprises a first direction and a second direction perpendicular to each other.

[0010] The display panel as above, optionally, the first surface is provided with an opening at the part in contact with the second surface, and the second surface is provided with a protrusion arranged in the opening.

[0011] Preferably, the protrusion is in contact with the bottom surface of the opening.

[0012] The display panel as above, optionally, the first surface is provided with a groove arranged around the opening.

[0013] The concave groove is filled with a conductive adhesive layer, and the conductive adhesive layer is in contact with the second surface;

[0014] Preferably, the material of the conductive adhesive layer is an anisotropic conductive adhesive ACF.

[0015] Preferably, the protrusion has a gap with the bottom surface of the opening, and the side wall of the protrusion has a gap with the side wall of the opening.

[0016] Preferably, the gap is filled with an insulating material, and the insulating material is an organic insulating material or has elasticity.

[0017] The display panel as above can optionally further comprise:

[0018] The first substrate is arranged on the side of the first branch line away from the second branch line.

[0019] The second substrate is arranged on the side of the second branch line away from the first substrate.

[0020] The side of the first substrate close to the second branch line has a slot, and the first branch line is arranged in the slot.

[0021] Preferably, the display panel further comprises: a packaging structure, and the packaging structure is arranged on the side of the first substrate away from the first branch line and / or on the side of the second substrate away from the second branch line.

[0022] According to another aspect of the present application, a display device is provided, comprising the display panel having any of the optional modes described above.

[0023] According to another aspect of the present application, a manufacturing method of a display panel is provided, comprising: manufacturing stretchable wires on a substrate; and connecting any two adjacent display islands through at least one stretchable wire.

[0024] The method for manufacturing the stretchable wires comprises:

[0025] The first branch lines are formed on the first substrate in intervals, and the second branch lines are formed on the second substrate in intervals.

[0026] The side of the first substrate with the first branch lines and the side of the second substrate with the second branch lines are joined together, so that the first branch lines and the second branch lines are rotationally connected, the first branch line or the second branch line arranged at the first end of the stretchable wire extends to the display island region, and the first branch line or the second branch line arranged at the second end of the stretchable wire extends to the display island region.

[0027] The first substrate and the second substrate are peeled off.

[0028] The manufacturing method of the display panel as above can optionally comprise:

[0029] The first substrate is coated on the first substrate, and a patterning process is performed on the first substrate to form a slot;

[0030] A first metal layer is formed at the slot, and a first patterning process is performed on the first metal layer to form an opening;

[0031] A second patterning process is performed on the first metal layer to form a groove, the groove surrounds the opening, and the depth of the groove is less than the depth of the opening;

[0032] The groove is filled with anisotropic conductive adhesive to form a conductive adhesive layer, and the thickness of the conductive adhesive layer is greater than or equal to the depth of the groove.

[0033] The manufacturing method of the display panel as above, optionally, the second substrate is formed with second branch lines at intervals, comprising:

[0034] The second substrate is coated on the second substrate;

[0035] A second metal layer is formed on the second substrate, and a patterning process is performed on the second metal layer to form a protrusion, the width of the protrusion is less than the width of the opening, and the height of the protrusion is less than or equal to the depth of the opening.

[0036] The manufacturing method of the display panel as above, optionally,

[0037] The side of the first substrate formed with the first branch line is matched with the side of the second substrate formed with the second branch line, comprising: the protrusion of the second branch line is fitted into the opening of the first branch line, and the side wall of the opening and the side wall of the protrusion have a gap;

[0038] Alternatively,

[0039] The gap is formed at the same time when the first patterning process is performed on the first metal layer to form the opening, the gap is located at the side wall of the opening, and the height of the gap is equal to the depth of the opening;

[0040] Alternatively,

[0041] After the opening is formed, the gap is formed at the side wall of the opening using an insulating material, and the height of the gap is equal to the depth of the opening.

[0042] The technical scheme of the embodiment of the present application, the display panel comprises display islands arranged in an array and a stretchable trace, and any two adjacent display islands are connected through at least one stretchable trace. Through the design of the structure of the stretchable trace, the stretchable trace comprises first branches and second branches arranged alternately, the first branches and the second branches are rotationally connected, the first branch or the second branch arranged at the first end of the stretchable trace extends to the display island area, and the first branch or the second branch arranged at the last end of the stretchable trace extends to the display island area. In this way, when the display panel is in a contracted state, the first branches and the second branches of the stretchable trace are in a folded mode; when the display panel is in a stretched state, the first branches and the second branches of the stretchable trace gradually unfold. The first branches and the second branches can rotate freely, thereby reducing the stress of the stretchable trace when stretched, improving the problem of trace breakage caused by too large stretching distance, improving the stretching rate of the display panel, and prolonging the service life of the display panel.

[0043] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0045] Figure 1 is a top view structural schematic diagram of a prior stretchable display panel before stretching;

[0046] Figure 2 is a top view structural schematic diagram of a prior stretchable display panel after stretching;

[0047] Figure 3 is a top view structural schematic diagram of a display panel provided by the embodiment of the present application;

[0048] Figure 4 is a local schematic diagram of a first branch and a second branch before being closed in the embodiment of the present application;

[0049] Figure 5 is a schematic diagram of a first branch and two second branches after being closed respectively in the embodiment of the present application;

[0050] Figure 6 is a schematic diagram of another first branch and two second branches after being closed respectively in the embodiment of the present application;

[0051] Figure 7 is a schematic view of another first branch wire and two second branch wires after being folded together according to an embodiment of the present application;

[0052] Figure 8 is a top view of a first branch wire and a second branch wire rotating relative to each other according to an embodiment of the present application;

[0053] Figure 9 is a top view of another display panel according to an embodiment of the present application;

[0054] Figure 10 is a top view of yet another display panel according to an embodiment of the present application;

[0055] Figure 11 is a stretching and retracting schematic view of a display panel according to an embodiment of the present application;

[0056] Figure 12 is a top view of still another display panel according to an embodiment of the present application;

[0057] Figure 13 is a flowchart of a manufacturing method of a stretchable wire according to an embodiment of the present application;

[0058] Figure 14 is a flowchart of a manufacturing method of a first branch wire according to an embodiment of the present application;

[0059] Figure 15 is a manufacturing flowchart of a first branch wire according to an embodiment of the present application;

[0060] Figure 16 is a flowchart of a manufacturing method of a second branch wire according to an embodiment of the present application;

[0061] Figure 17 is a manufacturing flowchart of a second branch wire according to an embodiment of the present application;

[0062] Figure 18 is a flowchart of folding together and peeling off a first substrate and a second substrate according to an embodiment of the present application;

[0063] Figure 19 is a structural schematic view of a display device according to an embodiment of the present application. DETAILED DESCRIPTION

[0064] In the following, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort should belong to the protection scope of the present application.

[0065] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances so that the embodiments of the application described herein can be implemented in other sequences than those illustrated or described herein.

[0066] When a certain embodiment can be implemented differently, the specific process sequence can be performed differently from the described sequence. For example, two consecutive described processes can be performed substantially at the same time or in the opposite order to the described sequence.

[0067] Stretchable display, as a form of wearable display, has attracted more and more attention, and is an important research direction of next-generation display technology. Figure 1 Fig. 1 shows a top view of a prior art stretchable display panel before stretching, Figure 2 Fig. 2 shows a top view of a prior art stretchable display panel after stretching. As shown in Figure 1 and Figure 2 The stretchable display panel includes island structures 1 and bridge structures 2 arranged on a stretchable substrate. The island structures 1 are used to form display devices, and the adjacent island structures 1 are connected by the bridge structures 2. The bridge structures 2 are used to form stretchable wires. When the stretchable display panel is stretched, the distance between the island structures 1 becomes larger, and the bridge structures 2 still connect the island structures 1, thereby ensuring the integrity of the stretchable display panel. However, the stretching distance of the stretchable display panel is not easy to control, and the stretching distance is prone to be too large, which causes the wires to be broken, resulting in product failure. To solve the above problems, the embodiments of the present application provide a display panel and a manufacturing method thereof, and a display device, which can improve the problem of wire breakage caused by too large stretching distance, improve the stretchability of the display panel, and prolong the service life of the display panel.

[0068] In the following, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort should belong to the protection scope of the present application.

[0069] Figure 3 Fig. 1 shows a top view of a prior art stretchable display panel before stretching, Fig. 2 shows a top view of a prior art stretchable display panel after stretching. As shown inFigure 3 As shown, the display panel 10 can be divided into a first area 10a and a second area 10b. The first area 10a is provided with the stretchable trace 20, and the second area 10b is provided with the display island 30. The display islands 30 are arranged in an array, and any two adjacent display islands 30 are connected by at least one stretchable trace 20. For example, Figure 3 For example, any two adjacent display islands 30 are connected by one stretchable trace 20.

[0070] Each display island 30 can include one or more light-emitting devices (i.e., sub-pixels) for displaying images and driver devices for driving the light-emitting devices to emit light. The light-emitting device can be an organic light-emitting device (e.g., OLED), and the structure thereof is not specially limited here.

[0071] Figure 4 A local schematic view of a first branch and a second branch before being joined together is shown; Figure 5 A schematic view of a first branch joined together with two second branches is shown. As shown, Figure 4 and Figure 5 As shown, the stretchable trace 20 includes first branches 21 and second branches 22 arranged alternately, and the first branches 21 and the second branches 22 are rotationally connected. The first branch 21 or the second branch 22 provided at the leading end of the stretchable trace 20 extends toward the display island 30 area, and the first branch 21 or the second branch 22 provided at the trailing end of the stretchable trace 20 extends toward the display island 30 area.

[0072] Referring to Figure 4 and Figure 5 It can be seen that the second branch 22 is provided on one side of the first branch 21, the first branch 21 has a first surface 100 on the side close to the second branch 22, the second branch 22 has a second surface 200 on the side close to the first branch 21, and the first surface 100 and the second surface 200 are partially in contact.

[0073] In an embodiment, the stretchable trace 20 is arranged along the stretchable direction of the display panel, and the stretchable direction includes a first direction and a second direction perpendicular to each other. For example, assuming that the display panel can stretch in the horizontal direction and the vertical direction of the plane on which the display panel is located (e.g., a rectangular display panel), then the stretchable trace 20 is also arranged along the horizontal direction and the vertical direction of the plane on which the display panel is located.

[0074] On the part where the first surface 100 and the second surface 200 are in contact, the first surface 100 is provided with an opening A, and the second surface 200 is provided with a protrusion B, which is arranged in the opening A.

[0075] Generally, the opening A is arranged at both ends of the first branch line 21 in the length direction, and the protrusion B is arranged at both ends of the second branch line 22 in the length direction. In this way, the first branch line 21 and the second branch line 22 can be used as much as possible, and the proportion of redundant lines in the display panel can be reduced.

[0076] It can be understood that, since the first branch line 21 and / or the second branch line 22 need to be overlapped with the display island 30, the edge of the display island 30 needs to be provided with the protrusion B matched with the opening A, and / or provided with the opening A matched with the protrusion B. Thus, the display panel can work normally.

[0077] Optionally, in addition to the opening A, the first surface 100 can also be provided with a groove 101, the groove 101 is arranged around the opening A, and the groove 101 is filled with a conductive adhesive layer, the conductive adhesive layer is in contact with the second surface 200, that is, the first branch line 21 and the second branch line 22 at the groove 101 are electrically connected through the conductive adhesive layer.

[0078] The side wall of the protrusion B has a spacing 102 to the side wall of the opening A, that is, the side wall of the protrusion B and the side wall of the opening A are isolated by the spacing 102.

[0079] In an embodiment, the width of the protrusion B is less than or equal to the distance between the two spacings 102, and the height of the protrusion B is less than or equal to the depth of the opening A. Thus, the protrusion B can be smoothly accommodated in the opening A.

[0080] As shown in FIG. 1, Figure 5 When the height of the protrusion B is equal to the depth of the opening A, the protrusion B is in contact with the bottom surface of the opening A, and the first branch line 21 and the second branch line 22 can be further electrically connected through the contact part of the protrusion B and the bottom surface of the opening A, to further ensure the reliability between the first branch line 21 and the second branch line 22.

[0081] Figure 6 FIG. 2 shows another schematic diagram of the first branch line and the two second branch lines after being folded according to an embodiment of the present application. As shown in FIG. 2, Figure 6 When the height of the protrusion B is less than the depth of the opening A, the protrusion B has a gap with the bottom surface of the opening A, so that the friction between the protrusion B and the bottom surface of the opening A can be avoided when the first branch line 21 and the second branch line 22 relatively rotate, and the rotating effect is affected.

[0082] In addition, Figure 7 FIG. 3 shows another schematic diagram of the first branch line and the two second branch lines after being folded according to an embodiment of the present application. As shown in FIG. 3, Figure 7 The opening A is a through hole formed on the first branch line 21, compared with the above Figure 5 and Figure 6 The manufacturing process of the through hole is simple, and is easier to implement.

[0083] Figure 8 A top view of relative rotation between the first branch line and the second branch line is shown. The embodiments of the present application are described in detail below with reference to the accompanying drawings. Figures 4-8 It can be seen that the first branch line 21 and the second branch line 22 are arranged at different layers, and the side wall of the protrusion B is isolated from the side wall of the opening A by the interval 102, so that the electrical connection between the first branch line 21 and the second branch line 22 is mainly achieved by the conductive adhesive layer. The conductive adhesive layer is made of a flexible conductive material, which will not be peeled off from the first branch line 21 and the second branch line 22 due to the relative rotation of the first branch line 21 and the second branch line 22, so that the first branch line 21 and the second branch line 22 can be freely rotated in the direction indicated by the arrow. Figure 8

[0084] In an embodiment, the material of the conductive adhesive layer is anisotropic conductive adhesive (ACF). The ACF realizes the conductive effect after being subjected to a certain pressure, so when filling the ACF, the filling thickness of the ACF can be greater than or equal to the actual thickness of the ACF after the first branch line 21 and the second branch line 22 are closed, so as to ensure the electrical connection effect of the first branch line 21 and the second branch line 22.

[0085] Continuing to refer to Figures 4-7 , the height of the interval 102 is equal to the depth of the opening A. It can be understood that the interval 102 can not only isolate the side wall of the protrusion B from the side wall of the opening A, but also limit the conductive adhesive layer. Specifically, in one possible implementation, the interval 102 is a through hole around the opening A; in another possible implementation, the isolation portion 103 is made of an insulating material.

[0086] Optionally, the insulating material is an organic insulating material, or the insulating material has elasticity. In this way, the relative rotation of the first branch line 21 and the second branch line 22 is facilitated.

[0087] In an embodiment, the material of the first branch line 21 and the second branch line 22 is titanium-aluminum-titanium or nano-silver.

[0088] In an embodiment, the display panel can further include a first substrate arranged on the side of the first branch line 21 away from the second branch line 22, and a second substrate arranged on the side of the second branch line 22 away from the first substrate. The side of the first substrate close to the second branch line 22 has a slot, and the first branch line 21 is arranged in the slot. The first substrate and the second substrate are used to protect the first branch line 21 and the second branch line 22, and improve the reliability of the stretchable trace 20.

[0089] ​Based on the above embodiments, and considering the performance of the display panel, the present invention further optimizes the telescopic wiring 20. Specifically, if the number of telescopic wiring 20 between any two adjacent display islands 30 is at least two, the telescopic wiring 20 satisfies either of the following two conditions:

[0090] Condition 1: The edge of the display island 30 is provided with an overlap point C, and at least two telescopic cables 20 overlap at the overlap point C.

[0091] Figure 9 This diagram illustrates a top view of another display panel provided in an embodiment of the present invention, exemplarily. Figure 9 The example shown is two adjacent display islands 30 connected by two telescopic traces 20. Figure 9 As shown, an overlap point C is provided on each edge of the display island 30, and the two telescopic cables 20 overlap at the overlap point C. In other words, the two telescopic cables 20 together form a single path. Thus, even if one telescopic cable 20 breaks, the other telescopic cable 20 can still ensure signal transmission, thereby further improving the reliability of the display panel.

[0092] Condition 2: The edge of the display island 30 is provided with multiple overlapping points, and each telescopic cable 20 overlaps on one of the overlapping points.

[0093] Figure 10 This diagram shows a top view of another display panel provided in an embodiment of the present invention, exemplarily. Figure 10 The example shown is two adjacent display islands 30 connected by two telescopic traces 20. Figure 10 As shown, multiple overlapping points are provided along any edge of the display island 30. Figure 10 (Not shown in the diagram), each telescopic trace 20 overlaps at a single overlap point, meaning each telescopic trace 20 is an independent path, controlling a portion of the sub-pixels within the display island 30. This improves the display panel's accuracy. It's understandable that the more telescopic traces 20 between any two adjacent display islands 30, the higher the display panel's accuracy; however, considering the manufacturing complexity of the display panel, the actual number of telescopic traces 20 between any two adjacent display islands 30 can be adjusted as needed.

[0094] Figure 11 A schematic diagram illustrating the telescopic nature of a display panel according to an embodiment of the present invention is shown. Figure 11 As shown, when the display panel is in the retracted state, the first branch 21 and the second branch 22 of the telescopic cable 20 are in a folded state; when the display panel is along... Figure 11When stretching in the direction indicated by the middle arrow, the first branch line 21 and the second branch line 22 of the stretchable trace 20 gradually unfold. The first branch line 21 and the second branch line 22 can freely rotate, reducing the stress on the stretchable trace 20 when stretched, thereby improving the problem of trace breakage caused by excessive stretching distance, improving the stretchability of the display panel, and prolonging the service life of the display panel.

[0095] The orthographic projection of the first branch line 21 and the second branch line 22 on the display panel is a straight line or a curve, so as to reasonably plan the layout of the stretchable trace 20.

[0096] As described above Figures 9-11 , the stretching direction of each stretchable trace 20 is consistent, that is, the line type of each stretchable trace 20 is the same; or, Figure 12 Another display panel provided by the embodiment of the present application is shown in the top view structural schematic diagram, as shown in Figure 12 , when the number of stretchable traces 20 between any two adjacent display islands 30 is even, the stretchable traces 20 between any two adjacent display islands 30 are distributed in a symmetrical structure.

[0097] In the present application, the stretchable trace 20 can adopt the design of consistent stretching direction as Figures 9-11 , or the design of symmetrical structure. The present application only needs to ensure that the first branch line 21 and the second branch line 22 have sufficient stretching space.

[0098] In addition, in the present application, the display panel can further include an inorganic film layer and a packaging structure. The packaging structure is arranged on the side of the first substrate away from the first branch line 21, and / or on the side of the second substrate away from the second branch line 22. Thus, the corrosion of water vapor and oxygen to the stretchable trace 20 is blocked. When the packaging structure is arranged on the side of the first substrate away from the first branch line 21 and on the side of the second substrate away from the second branch line 22, the packaging structure wraps the stretchable trace 20, so as to further improve the reliability of the stretchable trace 20 while ensuring the electrical connection of the stretchable trace 20.

[0099] The gap between the stretchable trace 20 and the display island 30 can be filled with super-elastic material such as polydimethylsiloxane (PDMS) and the like, which can support and protect the display panel.

[0100] The display panel provided by the embodiment of the present application comprises: display islands arranged in an array and a stretchable trace; any two adjacent display islands are connected by at least one stretchable trace; wherein the stretchable trace comprises first branches and second branches arranged alternately, the first branches are rotationally connected with the second branches; the first branch or the second branch arranged at the head end of the stretchable trace extends to the display island area, and the first branch or the second branch arranged at the tail end of the stretchable trace extends to the display island area. Through the design of the structure of the stretchable trace, the stretchable trace comprises first branches and second branches arranged alternately, the first branches are rotationally connected with the second branches, the first branch or the second branch arranged at the head end of the stretchable trace extends to the display island area, and the first branch or the second branch arranged at the tail end of the stretchable trace extends to the display island area. In this way, when the display panel is in a contracted state, the first branches and the second branches of the stretchable trace are in a folded state; when the display panel is in a stretched state, the first branches and the second branches of the stretchable trace gradually unfold. The first branches and the second branches can rotate freely, thereby reducing the stress of the stretchable trace when stretched, improving the problem of trace breakage caused by too large stretching distance, improving the stretching rate of the display panel, and prolonging the service life of the display panel.

[0101] The embodiment of the present application also provides a manufacturing method of a display panel, comprising: manufacturing a stretchable trace on a substrate; any two adjacent display islands are connected by at least one stretchable trace.

[0102] Specifically, Figure 13 A flowchart of a manufacturing method of a stretchable trace provided by the embodiment of the present application is shown. Figure 13 As shown, the manufacturing method comprises steps S110-S130.

[0103] S110, forming first branches on a first substrate at intervals; and forming second branches on a second substrate at intervals.

[0104] In step S110, the manufacturing method comprises two sub-steps of “forming first branches on a first substrate at intervals” and “forming second branches on a second substrate at intervals”, and the two sub-steps can be executed sequentially or separately, and the embodiment of the present application does not make a specific limitation thereon.

[0105] For the sub-step of “forming first branches on a first substrate at intervals”: Figure 14 A flowchart of a manufacturing method of a first branch provided by the embodiment of the present application is shown. Figure 15 A manufacturing flowchart of a first branch provided by the embodiment of the present application is shown. Figure 14 As shown, the manufacturing method comprises steps S110a-S110g.

[0106] S110a, applying a first substrate on a first substrate.

[0107] ReferenceFigure 15 (a) shows that the first substrate mainly plays a supporting role, so the first substrate is selected from rigid substrates. Optionally, the first substrate is a glass substrate.

[0108] The first substrate can play a role in protecting subsequent film layers and improving the stretchability of the first branch line. The material of the first substrate can be polyimide (PI).

[0109] S110b, performing a patterning process on the first substrate to form a slot.

[0110] Reference Figure 15 (b) shows that the slot is used to form the first branch line subsequently.

[0111] S110c, forming a first metal layer at the slot.

[0112] Reference Figure 15 (c) shows that the material of the first metal layer can be metal or metal alloy. Preferably, the material of the first metal layer is titanium-aluminum-titanium or nano-silver.

[0113] S110d, performing a first patterning process on the first metal layer to form an opening.

[0114] Reference Figure 15 (d) shows that the opening A is used to accommodate the protrusion B of the second branch line.

[0115] It can be understood that, with reference to the above Figures 4-7 When the first substrate is formed with the side of the first branch line and the second substrate is formed with the side of the second branch line in the subsequent step S120, the protrusion B is fitted into the opening A. Since the width of the protrusion B is less than the width of the opening A, the side wall of the opening A must have a gap 102 with the side wall of the protrusion B at this time, so as to realize the isolation of the opening A and the protrusion B.

[0116] Further optionally, in order to facilitate the filling of the isotropic conductive adhesive in the subsequent step S110g, the present embodiment can add a step of "forming a gap 102".

[0117] Specifically, the method of forming the gap 102 can include any one of the following two methods:

[0118] Method one: forming the gap 102 at the same time of forming the opening by performing the first patterning process on the first metal layer. That is, the opening A and the gap 102 are formed at the same time by using a mask or by controlling the distance, the gap 102 is located at the side wall of the opening A, and the height of the gap 102 is equal to the depth of the opening A.

[0119] Method two: after forming the opening A, insulating material is used to form a gap 102 between the sidewall of the opening A, and the height of the gap 102 is equal to the depth of the opening A. Figure 15 (e) is drawn by taking the gap 102 formed by insulating material between the sidewall of the opening A as an example.

[0120] Optionally, the insulating material is an organic insulating material, or the insulating material is elastic. In this way, the relative rotation of the first branch line and the second branch line is facilitated.

[0121] S110f, a second patterning process is performed on the first metal layer to form a groove, and the groove surrounds the opening and the depth of the groove is less than the depth of the opening.

[0122] S110g, the anisotropic conductive adhesive is filled in the groove to form a conductive adhesive layer, and the thickness of the conductive adhesive layer is greater than or equal to the depth of the groove.

[0123] Reference Figure 15 (f) and Figure 15 (g) shows that the groove 101 is used to accommodate the anisotropic conductive adhesive, such as anisotropic conductive film (ACF). The ACF realizes the conductive effect after being subjected to a certain pressure, so when filling the ACF, the filling thickness of the ACF can be greater than or equal to the depth of the groove 101, so as to ensure the electrical connection effect of the first branch line and the second branch line.

[0124] Similarly, for the sub-step of "forming the second branch line on the second substrate in a spaced manner": Figure 16 shows a flowchart of a method for manufacturing a second branch line according to an embodiment of the present application; Figure 17 shows a manufacturing flowchart of a second branch line according to an embodiment of the present application. As shown in Figure 16 , the method comprises steps S110h-S110j.

[0125] S110h, a second substrate is coated on the second substrate.

[0126] Reference Figure 17 (a) shows that the second substrate mainly plays a supporting role, so the second substrate is selected to be a rigid substrate. Optionally, the second substrate is a glass substrate.

[0127] The second substrate can play a role of protecting subsequent film layers and improving the stretchability of the second branch line. The material of the second substrate can be polyimide (PI).

[0128] S110i, a second metal layer is formed on the second substrate.

[0129] Reference Figure 17 (b) shows that the material of the second metal layer can be metal or metal alloy. Preferably, the material of the second metal layer is titanium-aluminum-titanium or nano-silver.

[0130] S110j, a patterning process is performed on the second metal layer to form a protrusion, the width of the protrusion being less than the width of the opening, and the height of the protrusion being less than or equal to the depth of the opening.

[0131] Reference Figure 18 As shown in (c), if the step of forming the interval 102 is added when the first branch line is made, the width of the protrusion B is less than or equal to the distance between the two intervals 102, and the height of the protrusion B is less than or equal to the depth of the opening A, so that the protrusion B can be smoothly accommodated in the opening A when the two are combined.

[0132] S120, combining the side of the first substrate with the first branch line and the side of the second substrate with the second branch line; and rotatingly connecting the first branch line and the second branch line, the first branch line or the second branch line at the leading end of the stretchable trace extending to the display island region, and the first branch line or the second branch line at the trailing end of the stretchable trace extending to the display island region.

[0133] Figure 18 A flowchart of combining and peeling the first substrate and the second substrate is shown.

[0134] Reference Figure 18 As shown in (a) and (b), when the first substrate and the second substrate are combined, the first substrate and the second substrate are pressed to allow the ACF to be extruded into the groove, and after the pressing, the anisotropic conductive properties in the ACF are released to achieve the electrical connection between the first branch line and the second branch line.

[0135] S130, peeling the first substrate and the second substrate.

[0136] Reference Figure 19 As shown in (c), after the first substrate and the second substrate are peeled, the first substrate and the second substrate can be removed or retained.

[0137] The embodiment of the present application provides a manufacturing method of a display panel, the stretchable trace includes the first branch line and the second branch line arranged alternately, the first branch line and the second branch line are rotationally connected, the first branch line or the second branch line at the leading end of the stretchable trace extends to the display island region, and the first branch line or the second branch line at the trailing end of the stretchable trace extends to the display island region. In this way, when the display panel is in the contracted state, the first branch line and the second branch line of the stretchable trace are in the folded state; and when the display panel is in the stretched state, the first branch line and the second branch line of the stretchable trace are gradually unfolded. The first branch line and the second branch line can rotate freely, the stress of the stretchable trace in the stretching process is reduced, the problem of the stretchable trace being broken due to the excessively large stretching distance is solved, the stretching rate of the display panel is improved, and the service life of the display panel is prolonged.

[0138] The embodiment of the present application also provides a display device,Figure 19 A structural schematic diagram of a display device provided by an embodiment of the present application is shown. As shown in the figure, the display device 70 comprises a display panel 71 provided by any embodiment of the present application. ​

[0139] The display device 70 can further comprise a front camera and a sensor. The front camera and the sensor are arranged correspondingly below the display area of the display panel 71. Optionally, in addition to the front camera and the sensor, other devices such as a gyroscope or an earpiece can also be arranged below the display area.

[0140] The display panel 71 can be any one of an organic light-emitting diode (OLED) display panel, an in-plane switching (IPS) display panel, a twisted nematic (TN) display panel, a vertical alignment (VA) display panel, an electronic paper, a QLED (Quantum Dot Light Emitting Diodes) display panel or a micro LED (μLED) display panel, and the present application is not specifically limited thereto. The light-emitting mode of the display panel 71 can be top emission, bottom emission or double-sided emission.

[0141] The display device 70 provided by the embodiment of the present application can be applied in smart wearable devices (such as smart bracelets and smart watches), and can also be applied in smart phones, tablet computers, displays and other devices.

[0142] Note that the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.​

Claims

1. A display panel, characterized in that, include: The array of display islands and the telescopic cabling; Any two adjacent display islands are connected by at least one of the telescopic cables; The telescopic cable includes alternating first and second branches, with the second branch located on one side of the first branch. The first and second branches are rotatably connected. The first branch has a first surface on the side near the second branch, and the second branch has a second surface on the side near the first branch. The first surface and the second surface are in partial contact. In the part where the first surface and the second surface are in contact, the first surface has an opening, and the second surface has a protrusion located in the opening. A first branch or a second branch located at the beginning of the telescopic cable extends toward the display island area, and a first branch or a second branch located at the end of the telescopic cable extends toward the display island area.

2. The display panel according to claim 1, characterized in that, The telescopic wiring is arranged along the telescopic direction of the display panel, and the telescopic direction includes a first direction and a second direction that are perpendicular to each other.

3. The display panel according to claim 1, characterized in that, The protrusion contacts the bottom surface of the opening.

4. The display panel according to claim 1, characterized in that, The first surface is provided with a groove, which is arranged around the opening; The groove is filled with a conductive adhesive layer, which is in contact with the second surface.

5. The display panel according to claim 4, characterized in that, The conductive adhesive layer is made of anisotropic conductive adhesive ACF.

6. The display panel according to claim 4, characterized in that, The protrusion has a gap with the bottom surface of the opening; the sidewall of the protrusion is spaced from the sidewall of the opening.

7. The display panel according to claim 6, characterized in that, The spacer is filled with an insulating material, which is either an organic insulating material or has elasticity.

8. The display panel according to claim 1, characterized in that, Also includes: A first substrate is disposed on the side of the first branch away from the second branch; The second substrate is disposed on the side of the second branch away from the first substrate; The first substrate has a groove on the side near the second branch line, and the first branch line is disposed in the groove.

9. The display panel according to claim 8, characterized in that, Also includes: Packaging structure; The packaging structure is disposed on the side of the first substrate away from the first branch line, and / or on the side of the second substrate away from the second branch line.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1-9.

11. A method for manufacturing a display panel, characterized in that, include: Fabricate telescopic traces on the substrate; Any two adjacent display islands are connected by at least one of the aforementioned telescopic cables; wherein... The method for creating the aforementioned retractable cable includes: A first branch line is formed at intervals on a first substrate; a second branch line is formed at intervals on a second substrate; The first substrate with the first branch line formed on one side and the second substrate with the second branch line formed on the other side are aligned, allowing the first branch line and the second branch line to be freely rotatably connected. The first branch line has a first surface on the side near the second branch line, and the second branch line has a second surface on the side near the first branch line. The first surface and the second surface are in partial contact. In the part where the first surface and the second surface are in contact, the first surface has an opening, and the second surface has a protrusion, which is located in the opening. The first branch line or the second branch line located at the beginning of the telescopic trace extends toward the display island area, and the first branch line or the second branch line located at the end of the telescopic trace extends toward the display island area. The first substrate and the second substrate are peeled off.

12. The method for manufacturing a display panel according to claim 11, characterized in that, The method of forming the first branch line at intervals on the first substrate includes: A first substrate is coated on the first substrate, and a patterning process is performed on the first substrate to form a groove; A first metal layer is formed at the slot, and the first metal layer is subjected to a first patterning process to form an opening; A second patterning process is performed on the first metal layer to form a groove, the groove surrounding the opening and the depth of the groove being less than the depth of the opening; An isotropic conductive adhesive is filled into the groove to form a conductive adhesive layer, the thickness of which is greater than or equal to the depth of the groove.

13. The method for manufacturing a display panel according to claim 12, characterized in that, The second branch line is formed at intervals on the second substrate, including: A second substrate is coated on the second substrate; A second metal layer is formed on the second substrate, and a patterning process is performed on the second metal layer to form a protrusion. The width of the protrusion is smaller than the width of the opening, and the height of the protrusion is less than or equal to the depth of the opening.

14. The method for manufacturing a display panel according to claim 13, characterized in that, The step of aligning the side of the first substrate with the first branch line and the side of the second substrate with the second branch line includes: adapting the protrusion of the second branch line to the opening of the first branch line, wherein the sidewall of the opening and the sidewall of the protrusion are spaced apart. or, While forming the opening through the first patterning process of the first metal layer, a gap is formed, the gap being located on the sidewall of the opening and the height of the gap being equal to the depth of the opening.

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