Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device, relates to the technical field of display, and reduces the stripping difficulty of a substrate and a bearing substrate. The display panel comprises an island area, a bridge area and a first area, the island area is connected with the bridge area, the area outside the island area and the bridge area is the first area, the display panel further comprises a substrate, pixel units and wires, the substrate comprises parts corresponding to the island area, the bridge area and the first area respectively, the pixel units are located in the island area and stacked on one side of the substrate, the wires are located in the bridge area, and the first area is located in the bridge area. The routing lines and the pixel units are located on the same side of the substrate, the routing lines are connected with the pixel units, and the substrate located in the first area comprises a hole structure, so that the optical cement and the bearing substrate are isolated through the substrate located in the first area in the subsequent module technological process, the optical cement is little or even does not make contact with the bearing substrate, and the yield of the module is improved. Therefore, adhesion between the optical cement and the bearing substrate is avoided, and the stripping difficulty of the substrate and the bearing substrate is reduced.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a display panel, a preparation method thereof, and a display device. Background Art

[0002] With the development of flexible display technologies, stretchable display panels have emerged and been applied, bringing new usage experiences to users. In the array substrate of the stretchable display panel provided in the related art, a flexible substrate is stacked on one side of a carrier substrate, and the optical adhesive is prone to adhesion with the carrier substrate, making it very difficult to peel off the flexible substrate and the carrier substrate.

[0003] Therefore, how to easily peel off the flexible substrate and the carrier substrate has become an urgent problem to be solved. Summary of the Invention

[0004] To solve the above technical problems, this application is proposed. Embodiments of this application provide a display panel, a preparation method thereof, and a display device.

[0005] In a first aspect, an embodiment of this application provides a display panel. The display panel includes an island region, a bridge region, and a first region. The island region and the bridge region are connected, and the region outside the island region and the bridge region is the first region. The display panel further includes a substrate, pixel units, wirings, a first optical adhesive layer, and a first elastic cover plate. The substrate includes portions corresponding to the island region, the bridge region, and the first region respectively. The pixel units are located in the island region, and the pixel units are stacked on one side of the substrate. The wirings are located in the bridge region, and the wirings and the pixel units are on the same side of the substrate. The wirings are connected to the pixel units. Among them, the substrate located in the first region includes a hole structure. The first optical adhesive layer is located in the island region, the bridge region, and the first region. The first optical adhesive layer is stacked on the side of the pixel units and the wirings away from the substrate. The first elastic cover plate is located in the island region, the bridge region, and the first region. The first elastic cover plate is stacked on the side of the first optical adhesive layer away from the substrate. This application retains the substrate located in the first region. Thus, in subsequent module process steps, through the substrate located in the first region, the optical adhesive and the carrier substrate are separated, such that the optical adhesive rarely or even does not contact the carrier substrate, thereby avoiding adhesion between the optical adhesive and the carrier substrate, and further reducing the peeling difficulty between the substrate and the carrier substrate.

[0006] In combination with the first aspect, in some implementation manners of the first aspect, the thickness of the substrate located in the first region is less than the thickness of the substrate located in the island region and less than the thickness of the substrate located in the bridge region, thereby improving the stretching rate of the substrate located in the first region and simultaneously improving the stretching rate of the display panel.

[0007] Preferably, the display panel further includes a second optical adhesive layer and a second elastic cover plate. The second optical adhesive layer is located in the island regions, the bridge regions, and the first region. The second optical adhesive layer is stacked on the side of the substrate away from the pixel units. The second elastic cover plate is located in the island regions, the bridge regions, and the first region. The second elastic cover plate is stacked on the side of the second optical adhesive layer away from the substrate.

[0008] Preferably, a part of the first optical adhesive layer is located within the hole structure.

[0009] Combined with the first aspect, in some implementation manners of the first aspect, the substrate located in the first region includes a plurality of hole structures. The extending directions of the plurality of hole structures are the same. Applied to a display panel that only requires unidirectional stretching, it not only realizes unidirectional stretching but also reduces the possibility of adhesion between the optical adhesive and the carrier substrate, thereby reducing the peeling difficulty between the substrate and the carrier substrate.

[0010] Combined with the first aspect, in some implementation manners of the first aspect, the substrate located in the first region includes a plurality of hole structures. A part of the hole structures extends along the first direction, and another part of the hole structures extends along the second direction. Thus, through the vector synthesis of the extending length in the first direction and the extending length in the second direction, multi-directional stretching of the display panel is realized.

[0011] Combined with the first aspect, in some implementation manners of the first aspect, the display panel includes a plurality of island regions. The plurality of island regions are arranged in multiple rows and multiple columns. The first direction is the same as the row arrangement direction of the island regions, and the second direction is the same as the column arrangement direction of the island regions. This makes it more convenient and easier to design the extending lengths that meet different stretching requirements.

[0012] Combined with the first aspect, in some implementation manners of the first aspect, the hole structure includes through holes and / or blind holes.

[0013] Combined with the first aspect, in some implementation manners of the first aspect, the cross-sectional shape of the hole structure in the thickness direction of the display panel is V-shaped.

[0014] Preferably, the difference between the depth of the hole structure and the thickness of the substrate is greater than 0 micrometers and less than 1 micrometer.

[0015] Combined with the first aspect, in some implementation manners of the first aspect, the material of the substrate includes polyimide.

[0016] Second aspect, an embodiment of the present application provides a method for manufacturing a display panel. The display panel includes an island region, a bridge region, and a first region. The island region and the bridge region are connected, and the region outside the island region and the bridge region is the first region. The manufacturing method includes: providing a carrier substrate, and preparing a substrate on one side of the carrier substrate. The substrate includes parts corresponding to the island region, the bridge region, and the first region respectively; preparing pixel units and traces on one side of the substrate. The pixel units are located in the island region, and the traces are located in the bridge region. The traces are connected to the pixel units; etching the substrate located in the first region to form a hole structure; preparing a first optical glue layer on the side of the pixel units and the traces away from the substrate; attaching a first elastic cover plate on the side of the first optical glue layer away from the substrate; removing the carrier substrate, and preparing a second optical glue layer on the side of the substrate away from the pixel units. This manufacturing method retains the substrate located in the first region, so that in subsequent module process steps, through the substrate located in the first region, the optical glue and the carrier substrate are separated, making the optical glue rarely or even not contact the carrier substrate, thus avoiding the adhesion between the optical glue and the carrier substrate, and further reducing the peeling difficulty between the substrate and the carrier substrate.

[0017] Third aspect, an embodiment of the present application provides a display device, including the display panel mentioned in any of the above embodiments.

[0018] The display panel provided by the embodiment of the present application includes an island region, a bridge region, and a first region. The island region and the bridge region are connected, and the region outside the island region and the bridge region is the first region. It also includes a substrate, pixel units, traces, a first optical glue layer, and a first elastic cover plate. The substrate includes parts corresponding to the island region, the bridge region, and the first region respectively. The pixel units are located in the island region, and the pixel units are stacked on one side of the substrate. The traces are located in the bridge region, and the traces and the pixel units are on the same side of the substrate. The traces are connected to the pixel units. Among them, the substrate located in the first region includes a hole structure. The first optical glue layer is located in the island region, the bridge region, and the first region, and the first optical glue layer is stacked on the side of the pixel units and the traces away from the substrate. The first elastic cover plate is located in the island region, the bridge region, and the first region, and the first elastic cover plate is stacked on the side of the first optical glue layer away from the substrate. Thus, in subsequent module process steps, through the substrate located in the first region, the optical glue and the carrier substrate are separated, making the optical glue rarely or even not contact the carrier substrate, thus avoiding the adhesion between the optical glue and the carrier substrate, and further reducing the peeling difficulty between the substrate and the carrier substrate. Description of the Drawings

[0019] By describing the embodiments of the present application in more detail in combination with the drawings, the above and other objects, features, and advantages of the present application will become more obvious. The drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application, and do not constitute a limitation to the present application. In the drawings, the same reference numerals generally represent the same components or steps.

[0020] Figure 1 The figure shows a schematic structural diagram of a display device provided by the related art.

[0021] Figure 2 The figure shows a top-view structural diagram of a display panel provided by the related art.

[0022] Figure 3 As shown along Figure 2 the cross-sectional structural diagram of the line N1-N2 in

[0023] Figure 4 The figure shows a schematic structural diagram of an intermediate product in the module manufacturing process provided by the related art.

[0024] Figure 5a The figure shows a schematic structural diagram of a display panel provided by an embodiment of the present application.

[0025] Figure 5b The figure shows a schematic structural diagram of a display panel provided by another embodiment of the present application.

[0026] Figure 6 The figure shows a schematic structural diagram of a display panel provided by another embodiment of the present application.

[0027] Figure 7 The figure shows a schematic structural diagram of a display panel provided by another embodiment of the present application.

[0028] Figure 8 The figure shows a schematic structural diagram of a hole structure provided by an embodiment of the present application.

[0029] Figure 9 The figure shows a schematic structural diagram of a hole structure provided by another embodiment of the present application.

[0030] Figure 10 The figure shows a schematic structural diagram of a hole structure provided by another embodiment of the present application.

[0031] Figure 11 The figure shows a schematic structural diagram of a hole structure provided by another embodiment of the present application.

[0032] Figure 12 The figure shows a top-view structural diagram of a substrate located in the first region provided by an embodiment of the present application.

[0033] Figure 13 The figure shows a schematic flowchart of a method for manufacturing a display panel provided by an embodiment of the present application.

[0034] Figure 14 The figure shows a schematic structural diagram of a display device provided by an embodiment of the present application.

[0035] Reference numerals: display panel 100; island area A; bridge area B; first area C; substrate 110; pixel unit 120; trace 130; first optical adhesive layer 140; first elastic cover plate 150; second optical adhesive layer 160; second elastic cover plate 170; first side D1; second side D2; third side D3; fourth side D4; first direction E1; second direction E2; display device F; cover plate 20; optical adhesive 30; carrier substrate 40. Detailed implementation manners

[0036] With the development of Internet of Things technology, more and more consumer electronics are integrated into our lives. These consumer electronics usually need to achieve not only two-dimensional plane display but also three-dimensional plane display. In order to meet the increasing demands of users for display technology, stretchable display technology has emerged as the times require.

[0037] The substrate in a linear stretchable display panel usually consists of an island structure and a bridge structure connecting the island structures. Pixel units can be arranged on the island structure, and traces connecting adjacent pixel units can be arranged on the bridge structure. When strain is applied to the stretchable display panel, the bridge structure stretches and the distance between the island structures increases. The cumulative deformation actions of each island structure and bridge structure during the stretching process cause the entire display panel to be stretched. During the stretching process of the stretchable display panel, most of the strain is concentrated on the bridge structure, and the island structure does not deform, thus effectively protecting the light-emitting devices and pixel driving circuits in the pixel units.

[0038] Figure 1 Shown is a schematic structural diagram of a display device provided by the related art. As Figure 1 shown, the display device F in the related art includes a cover plate 20, an optical adhesive 30, a display panel 100, an optical adhesive 30, and an elastic cover plate 20 stacked in sequence. Among them, the display panel 100 includes an array substrate.

[0039] Figure 2 Shown is a top view structural diagram of a display panel provided by the related art. Figure 3 Shown is along Figure 2 the cross-sectional structural diagram of the N1-N2 line in Figure 2 and Figure 3 shown, the display panel 100 includes an island area A, a bridge area B, and a first area C. The island area A and the bridge area B are connected, and the area outside the island area A and the bridge area B is the first area C. The display panel 100 further includes a substrate 110, a pixel unit 120, and a trace 130. The substrate 110 is located in the island area A and the bridge area B, the pixel unit 120 is located in the island area A, the pixel unit 120 is stacked on one side of the substrate 110, the trace 130 is located in the bridge area B, the trace 130 and the pixel unit 120 are stacked on the same side of the substrate 110, and the trace 130 connects adjacent pixel units 120.

[0040] It can be understood that, in order to ensure the stretching rate, the substrate 110 in the first region C is completely etched to form a through hole, resulting in the absence of the substrate 110 in the first region C.

[0041] Figure 4 The following shows a schematic structural diagram of an intermediate product in the module process provided by the related art. As Figure 4 shown, based on Figure 2 and Figure 3 When performing subsequent module processes on the display panel shown, for example, when attaching the cover plate 20 to both sides of the display panel 100 through the optical adhesive 30, since the substrate 110 is stacked on one side of the carrier substrate 40, the optical adhesive 30 adheres to the carrier substrate 40 through the through hole, making it very difficult to peel off the substrate 110 and the carrier substrate 40, thus causing trouble to the subsequent attachment of the display panel 100 and the cover plate 20.

[0042] To solve the above technical problems, an embodiment of the present application provides a display panel. By retaining a part of the substrate 110 in the first region C, the substrate 110 in the first region C is used to isolate the optical adhesive 30 and the carrier substrate 40, so that the optical adhesive 30 rarely or even does not contact the carrier substrate 40, thereby avoiding the adhesion between the optical adhesive 30 and the carrier substrate 40, and further reducing the peeling difficulty between the substrate 110 and the carrier substrate 40.

[0043] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0044] In addition, for better illustration of the present application, numerous specific details are given in the following specific embodiments. Those skilled in the art should understand that the present application can be implemented without some specific details. In some instances, methods and means well-known to those skilled in the art are not described in detail to highlight the gist of the present application.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0046] In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0047] Figure 5a The following shows a schematic structural diagram of a display panel provided by an embodiment of the present application. As Figure 5aAs shown in the figure, the display panel 100 provided by the embodiment of the present application includes an island region A, a bridge region B, and a first region C. The island region A and the bridge region B are connected, and the region outside the island region A and the bridge region B is the first region C. The display panel 100 further includes a substrate 110, pixel units 120, traces 130, a first optical adhesive layer 140, and a first elastic cover plate 150. The substrate 110 includes parts corresponding to the island region A, the bridge region B, and the first region C respectively. The pixel units 120 are located in the island region A, and the pixel units 120 are stacked on one side of the substrate 110. The traces 130 are located in the bridge region B, and the traces 130 and the pixel units 120 are located on the same side of the substrate 110. The traces 130 are connected to the pixel units 120. Among them, the substrate 110 located in the first region C includes a hole structure. The first optical adhesive layer 140 is located in the island region, the bridge region, and the first region. The first optical adhesive layer 140 is stacked on the side of the pixel units and the traces away from the substrate. The first elastic cover plate 150 is located in the island region, the bridge region, and the first region. The first elastic cover plate 150 is stacked on the side of the first optical adhesive layer 140 away from the substrate.

[0048] Figure 5b The following is a schematic structural diagram of a display panel provided by another embodiment of the present application. As Figure 5b shown, preferably, the display panel further includes a second optical adhesive layer 160 and a second elastic cover plate 170. The second optical adhesive layer 160 is located in the island region, the bridge region, and the first region. The second optical adhesive layer 160 is stacked on the side of the substrate away from the pixel units. The second elastic cover plate 170 is located in the island region, the bridge region, and the first region. The second elastic cover plate 170 is stacked on the side of the second optical adhesive layer 160 away from the substrate.

[0049] Preferably, part of the first optical adhesive layer 140 is located in the hole structure.

[0050] Referring to Figure 5a and 5b , taking the hole structure as a blind hole as an example, the cross-sectional shape of the blind hole along the thickness direction of the display panel 100 is V-shaped.

[0051] The hole structure can also be a through hole (as Figure 6 shown).

[0052] In some embodiments, the material of the substrate 110 includes polyimide, which is a flexible transparent organic material with good ductility. It can be understood that the substrate 110 located in the first region C includes a hole structure, so that the substrate 110 located in the first region C can be stretched. The traces 130 can be one or more of a scan signal line, a data voltage signal line, and a power voltage signal line.

[0053] In some embodiments, the material of the trace 130 is an organic material and a conductive material, wherein the conductive material is wrapped by the organic material. The organic material can be an organic photoresist, and the conductive material is mainly a metal material. The shape of the trace 130 can be "snake" shaped to ensure the stretching performance of the trace 130. The metal material includes, for example, titanium-aluminum-titanium, copper, silver, etc. When the trace 130 is subjected to an external force, it can produce elastic deformation, and when the external force is removed, it can return to its original shape. Moreover, when the trace 130 produces elastic deformation, its electrical conductivity remains unchanged all the time.

[0054] It can be understood that in the display panel 100 provided in the embodiments of the present application, the substrate 110 is a flexible substrate, and the flexible substrate can also be formed of a silicone material (such as polydimethylsiloxane) with good deformation performance. When the flexible substrate is stretched, it can produce deformation, so that the relative distance between the pixel units 120 changes.

[0055] It should be noted that compared with the display panel 100 in the related art, in the embodiments of the present application, when the cover plate 20 is attached to both sides of the display panel 100 through the optical adhesive 30, the optical adhesive 30 only exists at the through holes of the hole structure, rather than the entire first region C having the optical adhesive 30. Even when the hole structure is a blind hole, the optical adhesive 30 will not flow to the carrier substrate 40. Therefore, the contact area between the optical adhesive 30 and the carrier substrate 40 is greatly reduced in the embodiments of the present application.

[0056] The embodiments of the present application retain a part of the substrate 110 located in the first region C. Thus, in the subsequent module manufacturing process, through the substrate 110 located in the first region C, the optical adhesive 30 and the carrier substrate 40 are separated, so that the optical adhesive 30 rarely or even does not contact the carrier substrate 40, thereby avoiding adhesion between the optical adhesive 30 and the carrier substrate 40, and further reducing the peeling difficulty between the substrate 110 and the carrier substrate 40.

[0057] Figure 7 The following shows a schematic structural diagram of a display panel provided in another embodiment of the present application. As Figure 7 shown, in the display panel 100 provided in the embodiments of the present application, the thickness of the substrate 110 located in the first region C is less than the thickness of the substrate 110 located in the island region A, and is also less than the thickness of the substrate 110 located in the bridge region B.

[0058] Taking Figure 7 as an example, Figure 7 the shown embodiment is obtained based on Figure 6 the shown embodiment, Figure 7 and the difference from Figure 6 is that in Figure 7In the illustrated embodiment, the thickness of the substrate 110 in the first region C is less than the thickness of the substrate 110 in the island region A and also less than the thickness of the substrate 110 in the bridge region B. Of course, for the embodiment shown in FIG. 5, the above object can still be achieved by thinning the thickness of the substrate 110 in the first region C, and the drawings will not be listed one by one here.

[0059] It can be understood that the smaller the thickness of the substrate 110, the greater the stretching rate of the display panel 100; on the contrary, the greater the thickness of the substrate 110, the smaller the stretching rate of the display panel 100. Therefore, by partially etching the substrate 110 in the first region C, the thickness of the substrate 110 in the first region C is thinned, thereby increasing the stretching rate of the substrate 110 in the first region C and at the same time increasing the stretching rate of the display panel 100.

[0060] In the embodiment of the present application, by partially etching the substrate 110 in the first region C, the thickness of the substrate 110 in the first region C is thinned, specifically, the thickness of the substrate 110 in the first region C is less than the thickness of the substrate 110 in the island region A and also less than the thickness of the substrate 110 in the bridge region B.

[0061] In some embodiments, the thickness of the substrate 110 in the first region C can be three - fourths or one - half or one - fourth of the thickness of the substrate 110 in the island region A or the thickness of the substrate 110 in the bridge region B, or the thickness of the substrate 110 in the first region C can be set according to actual needs, and the embodiment of the present application does not make further restrictions on this.

[0062] Figure 8 The following is a schematic structural diagram of a hole structure provided by an embodiment of the present application. Figure 9 The following is a schematic structural diagram of a hole structure provided by another embodiment of the present application. In the display panel 100 provided by the embodiment of the present application, the substrate 110 in the first region C includes a plurality of hole structures, and the extending directions of the plurality of hole structures are the same (as Figure 8 and 9 shown).

[0063] In some display panels 100 that only require unidirectional stretching, in the embodiment of the present application, by setting the extending directions of the plurality of hole structures to be the same, that is, the plurality of hole structures only support unidirectional stretching, unidirectional stretching of the display panel 100 is achieved. And at a certain stretching rate, compared with the number of the plurality of hole structures in a plurality of extending directions, the number of the plurality of hole structures with the same extending direction is less, thereby reducing the contact area between the optical glue 30 and the carrier substrate 40.

[0064] It can be understood that in the embodiment of the present application, the stretching direction of the display panel 100 is perpendicular to the extending direction of the hole structure.

[0065] Therefore, the embodiment of the present application is applied to the display panel 100 that only needs to be stretched unidirectionally, which not only realizes unidirectional stretching, but also reduces the possibility of adhesion between the optical glue 30 and the carrier substrate 40, thereby reducing the peeling difficulty between the substrate 110 and the carrier substrate 40.

[0066] Referring to Figure 8 , taking the display panel 100 including a relatively arranged first side D1 and second side D2, and a relatively arranged third side D3 and fourth side D4 as an example, the extending directions of the plurality of hole structures are the same. Specifically, the extending direction points from the first side D1 to the second side D2, or from the second side D2 to the first side D1, then the stretching direction of the display panel 100 points from the third side D3 to the fourth side D4, or from the fourth side D4 to the third side D3.

[0067] In another example, referring to Figure 9 , the extending directions of the plurality of hole structures are the same. Specifically, the extending direction points from the third side D3 to the fourth side D4, or from the fourth side D4 to the third side D3, then the stretching direction of the display panel 100 points from the first side D1 to the second side D2, or from the second side D2 to the first side D1.

[0068] Of course, it can be understood that the extending directions of the plurality of hole structures are not limited to Figure 8 and Figure 9 shown directions. The extending directions of the plurality of hole structures can also form an acute angle with the direction from the first side D1 to the second side D2, or the extending directions of the plurality of hole structures can also form an acute angle with the direction from the third side D3 to the fourth side D4, which can be set according to actual needs.

[0069] Figure 10 The following shows a schematic structural diagram of the hole structure provided by another embodiment of the present application. As Figure 10 shown, in the display panel 100 provided by the embodiment of the present application, the substrate 110 located in the first region C includes a plurality of hole structures, and a part of the hole structures extend along the first direction E1, and another part of the hole structures extend along the second direction E2.

[0070] In some display panels 100 that need to be stretched in multiple directions, the embodiment of the present application arranges a part of the hole structures to extend along the first direction E1 and another part of the hole structures to extend along the second direction E2, so as to realize the multi-directional stretching of the display panel 100 through the vector synthesis of the extending length in the first direction E1 and the extending length in the second direction E2.

[0071] It can be understood that the angle between the first direction E1 and the second direction E2 can be a right angle or an acute angle.

[0072] Referring to Figure 10, the display panel 100 includes a plurality of island regions A, and the plurality of island regions A are arranged in multiple rows and multiple columns. The first direction E1 is the same as the row arrangement direction of the island regions A, and the acute angle formed by the second direction E2 and the first direction E1 is 60°. Taking the extension length of the display panel 100 in the first direction E1 as L and the extension length in the second direction E2 as also L as an example, through the vector synthesis of the extension length L in the first direction E1 and the extension length L in the second direction E2, finally the display panel 100 extends in the angular bisector direction of the acute angle formed by the first direction E1 and the second direction E2 It can be understood that the acute angle between the angular bisector direction of the acute angle formed by the first direction E1 and the second direction E2 and the first direction E1 is 30°, and the acute angle between it and the second direction E2 is 30°.

[0073] In the actual application process, the embodiment of the present application is applied to the display panel 100 that needs to be stretched in multiple directions. Through the vector synthesis of the extension length in the first direction E1 and the extension length in the second direction E2, the multi-directional stretching of the display panel 100 is realized.

[0074] Figure 11 The following is a schematic structural diagram of the hole structure provided by another embodiment of the present application. As Figure 11 shown, in the display panel 100 provided by the embodiment of the present application, the display panel 100 includes a plurality of island regions A, and the plurality of island regions A are arranged in multiple rows and multiple columns. The first direction E1 is the same as the row arrangement direction of the island regions A, and the second direction E2 is the same as the column arrangement direction of the island regions A.

[0075] Reference Figure 11 , it can be understood that the row arrangement direction of the island regions A and the column arrangement direction of the island regions A are perpendicular, that is, in the embodiment of the present application, the first direction E1 and the second direction E2 are perpendicular. Taking the extension length of the display panel 100 in the first direction E1 as L and the extension length in the second direction E2 as also L as an example, through the vector synthesis of the extension length L in the first direction E1 and the extension length L in the second direction E2, finally the display panel 100 extends in the angular bisector direction of the right angle formed by the first direction E1 and the second direction E2

[0076] By setting the first direction E1 to be the same as the row arrangement direction of the island regions A and the second direction E2 to be the same as the column arrangement direction of the island regions A, the embodiment of the present application makes it more convenient, simpler and easier to design the extension lengths that meet different stretching requirements.

[0077] Figure 12 The following is a schematic top view structure diagram of the substrate located in the first region provided by an embodiment of the present application. Figure 12The schematic diagram of the top view of the substrate 110 in the first area C when the display panel 100 is in a stretched state is shown. When the substrate 110 in the first area C includes through holes, the substrate 110 in the first area C in the stretched state is in a mesh shape, and multiple cavities appear at the through holes.

[0078] In addition, the present application is not limited to the substrate 110 located in the first region C. Figure 12 The mesh morphology shown, any mesh morphology with stretchability is suitable for the substrate 110 located in the first region C in the present application.

[0079] In some embodiments, the hole structure includes through holes and / or blind holes. For example, the substrate 110 located in the first region C includes only through holes ( Figure 6 ), or only blind holes (FIG. 5), or a combination of through holes and blind holes.

[0080] In some embodiments, the cross-sectional shape of the hole structure along the thickness direction of the display panel 100 is V-shaped ( FIG. 5 ). Preferably, the difference between the depth of the hole structure and the thickness of the substrate is greater than 0 micrometer and less than 1 micrometer.

[0081] The specific contents of the display panel 100 provided in the present application are described in detail above. Based on the same inventive concept, the present application also provides a corresponding preparation method. The specific steps of the preparation method are described below.

[0082] Figure 13 FIG. 1 is a schematic diagram of a method for preparing a display panel according to an embodiment of the present application. Figure 13 As shown, an embodiment of the present application provides a method for manufacturing a display panel, wherein the display panel 100 includes an island area A, a bridge area B, and a first area C, wherein the island area A and the bridge area B are connected, and an area other than the island area A and the bridge area B is the first area C. The manufacturing method includes the following steps:

[0083] Step S1301 , providing a carrier substrate, and preparing a substrate 110 on one side of the carrier substrate.

[0084] The substrate 110 includes portions corresponding to the island region A, the bridge region B, and the first region C, respectively.

[0085] Step S1302 , preparing pixel units 120 and traces 130 on one side of the substrate 110 .

[0086] The pixel unit 120 is located in the island area A, the wiring 130 is located in the bridge area B, and the wiring 130 connects the pixel unit 120 .

[0087] Step S1303, etching the substrate 110 located in the first region C to form a hole structure;

[0088] Step S1304: Prepare a first optical glue layer 140 on the side of the pixel unit 120 and the trace 130 away from the substrate 110;

[0089] Step S1305: Attach a first elastic cover plate 150 on the side of the first optical glue layer 140 away from the substrate 110;

[0090] Step S1306: Remove the carrier substrate, and prepare a second optical glue layer 160 on the side of the substrate 110 away from the pixel unit 120;

[0091] Step S1307: Attach a second elastic cover plate 170 on the side of the second optical glue layer 160 away from the substrate 110 to obtain the display panel 100.

[0092] The manufacturing method provided by the embodiment of the present application retains the substrate 110 located in the first region C. Thus, in the subsequent module manufacturing process, through the substrate 110 located in the first region C, the optical glue 30 and the carrier substrate 40 are separated, so that the optical glue 30 rarely or even does not contact the carrier substrate 40, thereby avoiding the adhesion between the optical glue 30 and the carrier substrate 40, and further reducing the peeling difficulty between the substrate 110 and the carrier substrate 40.

[0093] In some embodiments, the thickness of the substrate 110 located in the first region C is less than the thickness of the substrate 110 located in the island region A and also less than the thickness of the substrate 110 located in the bridge region B, thereby improving the elongation rate of the substrate 110 located in the first region C and simultaneously improving the elongation rate of the display panel 100.

[0094] In some implementation manners, the substrate 110 located in the first region C includes a plurality of hole structures, and the extending directions of the plurality of hole structures are the same. Applied to the display panel 100 that only needs to be stretched in one direction, it not only realizes unidirectional stretching but also reduces the possibility of adhesion between the optical glue 30 and the carrier substrate 40, and further reduces the peeling difficulty between the substrate 110 and the carrier substrate 40.

[0095] In some implementation manners, the substrate 110 located in the first region C includes a plurality of hole structures, a part of the hole structures extend along the first direction E1, and another part of the hole structures extend along the second direction E2. Thus, through the vector synthesis of the extending length in the first direction E1 and the extending length in the second direction E2, multi-directional stretching of the display panel 100 is realized.

[0096] In some implementation manners, the display panel 100 includes a plurality of island regions A, and the plurality of island regions A are arranged in a multi-row and multi-column manner. The first direction E1 is the same as the row arrangement direction of the island regions A, and the second direction E2 is the same as the column arrangement direction of the island regions A, thereby making it more convenient, simpler, and easier to design the extending lengths that meet different stretching requirements.

[0097] In some implementations, the hole structure includes through holes and / or blind holes.

[0098] In some embodiments, the cross-sectional shape of the hole structure in the thickness direction of the display panel 100 is V-shaped. Preferably, the difference between the depth of the hole structure and the thickness of the substrate is greater than 0 microns and less than 1 micron. Preferably, the material of the substrate 110 includes polyimide.

[0099] Figure 14 The following is a schematic structural diagram of a display device provided by an embodiment of the present application. As Figure 14 shown, an embodiment of the present application provides a display device F, which includes the display panel 100 mentioned in any of the above embodiments. Its technical principle and the effects produced are similar and will not be elaborated here.

[0100] It can be understood that the display panel 100 can also be applied to other display devices F, which can be, for example, any product or component with a display function such as a mobile phone, a tablet computer, a computer monitor, a television, a wearable device, or an information query machine.

[0101] The basic principle of the present application has been described above in combination with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in the present application are only examples and not limitations. It cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of the present application. Additionally, the above-disclosed specific details are only for illustrative and easy-to-understand purposes and not limitations. The above details do not limit the present application to necessarily adopt the above specific details for implementation.

[0102] It should also be noted that in the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present application. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

Claims

1. A display panel, characterized in that, It includes an island region, a bridge region, and a first region. The island region is connected to the bridge region, and the region outside the island region and the bridge region is the first region. It further includes: A substrate, including parts corresponding to the island region, the bridge region, and the first region respectively; Pixel units, located in the island region and stacked on one side of the substrate; Trace lines, located in the bridge region, on the same side of the substrate as the pixel units, and connecting the pixel units; Wherein, the substrate located in the first region includes a hole structure; A first optical adhesive layer, located in the island region, the bridge region, and the first region, and stacked on the side of the pixel units and the trace lines away from the substrate; A first elastic cover plate, located in the island region, the bridge region, and the first region, and stacked on the side of the first optical adhesive layer away from the substrate.

2. The display panel according to claim 1, wherein The thickness of the substrate located in the first region is less than the thickness of the substrate located in the island region and also less than the thickness of the substrate located in the bridge region; Preferably, it further includes: a second optical adhesive layer, located in the island region, the bridge region, and the first region, and stacked on the side of the substrate away from the pixel units; and a second elastic cover plate, located in the island region, the bridge region, and the first region, and stacked on the side of the second optical adhesive layer away from the substrate; Preferably, part of the first optical adhesive layer is located within the hole structure.

3. The display panel according to claim 1, wherein The substrate located in the first region includes a plurality of the hole structures, and the extending directions of the plurality of hole structures are the same.

4. The display panel according to claim 1, characterized in that, The substrate located in the first region includes a plurality of the hole structures, a part of the hole structures extend along a first direction, and another part of the hole structures extend along a second direction.

5. The display panel according to claim 4, wherein It includes a plurality of the island regions, and the plurality of island regions are arranged in multiple rows and multiple columns. The first direction is the same as the row arrangement direction of the island regions, and the second direction is the same as the column arrangement direction of the island regions.

6. The display panel according to claim 1, characterized in that, The hole structure includes a through hole and / or a blind hole.

7. The display panel according to claim 1, wherein The cross-sectional shape of the hole structure along the thickness direction of the display panel is V-shaped; Preferably, the difference between the depth of the hole structure and the thickness of the substrate is greater than 0 microns and less than 1 micron.

8. The display panel according to any one of claims 1 to 7, characterized in that The material of the substrate includes polyimide.

9. A method for manufacturing a display panel, characterized in that, The display panel includes an island region, a bridge region, and a first region. The island region is connected to the bridge region, and the region outside the island region and the bridge region is the first region. The manufacturing method includes: Providing a carrier substrate and preparing a substrate on one side of the carrier substrate. The substrate includes parts corresponding to the island region, the bridge region, and the first region respectively; Preparing pixel units and trace lines on one side of the substrate. The pixel units are located in the island region, and the trace lines are located in the bridge region. The trace lines connect the pixel units; Etching the substrate located in the first region to form a hole structure; Preparing a first optical adhesive layer on the side of the pixel units and the trace lines away from the substrate; Attaching a first elastic cover plate on the side of the first optical adhesive layer away from the substrate; Removing the carrier substrate and preparing a second optical adhesive layer on the side of the substrate away from the pixel units.

10. A display device, characterized in that, It includes the display panel according to any one of claims 1 to 8 above.

Images