Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises: a plurality of pixel islands, the pixel islands comprising at least one sub-pixel; a connecting bridge, which is stretchably connected between two adjacent pixel islands; and a protection unit, which is arranged around the pixel islands and is spaced apart from the pixel islands, and is used for generating a resistance to stretching deformation when the display panel is stretched and deformed. The connecting bridge comprises a first connecting part and a second connecting part, the first connecting part connects the pixel islands and the protection unit, the second connecting part connects the protection unit and an adjacent protection unit, and the protection unit has conductivity. The display panel can improve the anti-deformation ability of the pixel islands, thereby improving the display effect of the display panel.

Description

TECHNICAL FIELD

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

[0002] The stretchable panel has the advantages of variability in any direction and stretchability and recovery, and has wide application prospects, and can be applied in various fields such as consumer electronics, public display, medical treatment, biology, wearing, game, fashion, vehicle-mounted display, etc.

[0003] In the existing stretchable panel, an island-shaped light-emitting area and a bridge-shaped wiring area are generally included, and the deformation ability of the wiring area is generally improved by designing a curved wiring. However, based on the above structural design defects, the twisting deformation of the wiring area will further cause the twisting deformation of the island-shaped light-emitting area, and the reliability of the pixel unit of the island-shaped display area is reduced, and the display effect is poor. SUMMARY

[0004] The present application provides a display panel and a display device, which aims to solve the problem that the pixel island structure is easily damaged when the display panel is stretched and deformed in the prior art.

[0005] To solve the above technical problems, the first technical solution provided by the present application is to provide a display panel. The display panel comprises:

[0006] A plurality of pixel islands, each pixel island comprising at least one sub-pixel;

[0007] A connecting bridge stretchably connected between two adjacent pixel islands;

[0008] The display panel further comprises:

[0009] A protection unit surrounding the pixel islands and spaced apart from the pixel islands, for generating a resistance to stretching deformation when the display panel is stretched and deformed; the connecting bridge comprises a first connecting part and a second connecting part, the first connecting part connecting the pixel island and the protection unit, the second connecting part connecting the protection unit and the adjacent protection unit, and the protection unit has conductivity.

[0010] In some embodiments, the protection unit is disconnected at the position corresponding to the corner of the pixel island, forming a plurality of protection structures; the protection structure is parallel to the side edge of the corresponding pixel island, and the length of the orthographic projection of the protection structure on the side edge of the corresponding pixel island is less than the length of the side edge of the corresponding pixel island.

[0011] In some embodiments, the corner between the adjacent side edges of the pixel island is chamfered.

[0012] In some embodiments, each side of the pixel island has a first extension, the protection structure has a second extension and a third extension respectively close to and away from the opposite sides of the pixel island; a first connecting part connects the corresponding first extension and the second extension, and a second connecting part connects the corresponding two adjacent third extensions.

[0013] In some embodiments, the display panel has at least a first stretching direction and a second stretching direction intersecting with each other;

[0014] The first extension, the second extension and the third extension arranged along the first stretching direction are located on a same first straight line, and the first straight line is parallel to the first stretching direction;

[0015] The first extension, the second extension and the third extension arranged along the second stretching direction are located on a same second straight line, and the second straight line is parallel to the second stretching direction.

[0016] In some embodiments, the pixel island has a rectangular, square, rhombic or polygonal shape, and the protection structure corresponds to each side of the pixel island; or,

[0017] The side of the pixel island includes an arc-shaped side, and the protection structure includes an arc-shaped protection structure corresponding to the arc-shaped side.

[0018] In some embodiments, the pixel island includes a driving layer, a planar layer, an anode electrode, a pixel definition layer and a conductive isolation structure arranged in sequence;

[0019] The pixel definition layer has a plurality of pixel openings corresponding to the anode electrode and exposing the anode electrode; the conductive isolation structure is arranged on a side of the pixel definition layer away from the driving layer and surrounds the pixel openings; a light-emitting layer and a cathode electrode are arranged in sequence in the pixel openings to form a sub-pixel with the corresponding anode electrode; and the cathode electrode is in contact with and electrically connected to the conductive isolation structure.

[0020] The protection unit is arranged in the same layer as the conductive isolation structure, and the first connecting part connects the conductive isolation structure and the protection structure at the edge of the pixel island.

[0021] In some embodiments, the conductive isolation structure includes a first conductive part and a first insulating top part; the first conductive part is arranged on a side of the pixel definition layer away from the driving layer and surrounds the pixel openings; and the first insulating top part covers a side of the first conductive part away from the driving layer, shields the first conductive part and extends out of the first conductive part in a direction parallel to the pixel definition layer.

[0022] The protection structure includes a second conductive part and a second insulating top part; the second conductive part is arranged in the same layer as the first conductive part and is spaced apart from the first conductive part; and the second insulating top part is arranged on a side of the first conductive part away from the pixel definition layer.

[0023] The first connecting part connects the adjacent first conductive part and the second conductive part, and the second connecting part connects two adjacent second conductive parts corresponding to the adjacent pixel islands.

[0024] In some embodiments, a side of the first insulating top close to the pixel opening extends out of the first conductive part in a direction parallel to the pixel definition layer, and a side of the first insulating top away from the pixel opening does not exceed the first conductive part; and a projection of the second insulating top on the second conductive part does not exceed the second conductive part.

[0025] To solve the above technical problems, a second technical solution provided by the present application is to provide a display device. The display device comprises:

[0026] The display panel is the display panel provided in the above technical solution.

[0027] The control circuit board is electrically connected with the display panel and is used for controlling the display panel to display a corresponding image.

[0028] The present application has the following beneficial effects: Different from the prior art, the present application provides a display panel and a display device. The display panel comprises a plurality of pixel islands and a connecting bridge. The connecting bridge connects the pixel islands arranged adjacent to each other, thereby performing signal transmission and realizing image display. The display panel further comprises a protection unit. The protection unit is arranged around the pixel islands, so as to generate a resistance to stretching deformation when the display panel is subjected to stretching deformation. The protection unit has good deformation resistance, and can effectively reduce the influence of the stress generated by the stretching deformation on the pixel islands, thereby protecting the pixel islands from being structurally damaged due to the deformation stress and improving the deformation resistance of the pixel islands. Meanwhile, the protection unit is arranged in a spaced-apart manner from the pixel islands, the first connecting part of the connecting bridge connects the pixel islands and the protection unit, and the second connecting part of the connecting bridge connects the protection unit and the adjacent protection unit, thereby realizing the connection between the pixel islands. When the display panel is subjected to stretching deformation, the pixel islands can be protected to maintain structural integrity under the action of external force, and the pixel islands and the peripheral protection unit can maintain good stretchability, so that the display panel can maintain good deformation capability. In addition, the protection unit has conductivity, so that the first connecting part and the second connecting part are electrically connected through the protection unit, thereby realizing the connection and transmission of signals. BRIEF DESCRIPTION OF DRAWINGS

[0029] 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. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative labor.

[0030] Figure 1is a schematic diagram of a planar structure of a display panel provided by a first embodiment of the present application;

[0031] Figure 2 is a schematic diagram of a planar structure of a display panel provided by a second embodiment of the present application;

[0032] Figure 3 is a schematic diagram of a planar structure of a display panel provided by a third embodiment of the present application;

[0033] Figure 4 is a schematic diagram of a planar structure of a display panel provided by a fourth embodiment of the present application;

[0034] Figure 5 is Figure 4 is a schematic diagram of a cross-sectional structure of the display panel in the A-A direction in the embodiment;

[0035] Figure 6 is Figure 4 is a schematic diagram of a cross-sectional structure of the display panel in the B-B direction in the embodiment;

[0036] Figure 7 is Figure 4 is a schematic diagram of a cross-sectional structure of the display panel in the C-C direction in the embodiment;

[0037] Figure 8 is Figure 4 is a schematic diagram of a cross-sectional structure of the display panel in the A-A direction in another embodiment;

[0038] Figure 9 is a schematic diagram of a structure of a display device provided by an embodiment of the present application.

[0039] Reference signs:

[0040] 100, display panel; 10, flexible substrate; 20, pixel island; 21, first side edge; 22, second side edge; 23, first extension part; 30, connection bridge; 31, first connection part; 32, second connection part; 40, protection unit; 41, protection structure; 411, first protection structure; 412, second protection structure; 42, second extension part; 43, third extension part; 51, driving layer; 52, planarization layer; 53, anode electrode; 54, pixel definition layer; 541, pixel opening; 55, conductive isolation layer; 551, first conductive part; 552, first insulating top part; 553, second conductive part; 554, second insulating top part; 56, light-emitting layer; 57, cathode electrode; 58, encapsulation structure; 581, first encapsulation layer; 582, second encapsulation layer; 583, third encapsulation layer; 200, control circuit board;

[0041] P, sub-pixel; X, first stretching direction; Y, second stretching direction; θ, chamfer; L1, first straight line; L2, second straight line. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all 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 belong to the scope of protection of the present application.

[0043] In the following description, specific details are set forth in order to provide a thorough understanding of the present application. The present application can be practiced with no one or more of the details, or with other methods, components, materials, and so on. In other instances, well-known structures, interfaces, and processes are not shown in detail or are shown in block diagram form in order to avoid obscuring the present application.

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all 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 belong to the scope of protection of the present application.

[0045] The terms "first", "second", "third", etc. are used only for the purpose of description and are not to be construed as indicating or implying relative importance or a specific number of the technical features indicated. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components, if the specific posture changes, the directional indications also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0046] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification is not necessarily all referring to the same embodiment, nor is it necessarily referring to a preferred or alternative embodiment to the exclusion of other embodiments. It is explicitly and implicitly understood that the embodiments described herein can be combined.

[0047] The present application will be described in detail below with reference to the drawings and embodiments.

[0048] Please refer to Figure 1 , Figure 1is a schematic diagram of a planar structure of a display panel provided by the first embodiment of the present application. In this embodiment, a display panel 100 is provided, which includes a plurality of pixel islands 20, connecting bridges 30 and protection units 40.

[0049] The plurality of pixel islands 20 are arranged in a matrix and are spaced apart, each pixel island 20 includes at least one sub-pixel P for displaying an image. The connecting bridges 30 are stretchably connected between two adjacent pixel islands 20 for transmitting a driving signal, and the connecting bridges 30 are in a stretched state when the display panel 100 is stretched. Specifically, the display panel 100 further includes a flexible substrate 10 for carrying the pixel islands 20 and the connecting bridges 30. The flexible substrate 10 can be formed of a material having a flexible bending performance, such as polydimethylsiloxane (PDMS) or polyimide (PI), to support the stretchable performance of the display panel 100.

[0050] Further, the display panel 100 further includes the protection units 40. The protection units 40 are arranged around the pixel islands 20 and are spaced apart from the pixel islands 20 for generating a resistance to stretching deformation when the display panel is stretched. The connecting bridges 30 include first connecting portions 31 and second connecting portions 32, the first connecting portions 31 connect the pixel islands 20 and the protection units 40, the second connecting portions 32 connect the protection units 40 and adjacent protection units 40, and the protection units have conductivity.

[0051] Specifically, the protection units 40 are arranged around the pixel islands 20, and when the display panel 100 is stretched, the protection units can be used to generate a resistance in the opposite direction of the stretching deformation stress, thereby having a function of resisting stretching deformation in the stretching direction, that is, the anti-deformation ability of the protection units can effectively reduce the influence of the stress generated by the stretching deformation on the pixel islands 20, thereby protecting the pixel islands 20 from being damaged by the deformation stress and improving the anti-deformation ability of the pixel islands 20.

[0052] Further, the protection unit 40 is arranged spaced apart from the pixel island 20, that is, the protection unit 40 and the pixel island 20 are spaced apart by a preset width. In addition, the connecting bridge 30 includes a first connecting portion 31 and a second connecting portion 32; one end of the first connecting portion 31 is connected to the outer side of the pixel island 20, and the other end is connected to the side of the protection unit 40 close to the pixel island 20; one end of the second connecting portion 32 is connected to the side of the protection unit 40 away from the pixel island 20, and the other end is connected to the side of the adjacent protection unit 40 away from the corresponding pixel island 20. It can be understood that the same second connecting portion 32 is shared between adjacent protection units 40, that is, the second connecting portions 32 in the two adjacent protection units 40 are the same second connecting portion 32. Alternatively, it can also be understood that the two adjacent pixel islands 20 are pixel island A and pixel island B, and the connecting bridge 30 between the sides close to each other of the pixel island A and the pixel island B includes two first connecting portions 31 and one second connecting portion 32, one of the first connecting portions 31 connects the pixel island A and the protection unit 40 corresponding to the pixel island A, the other first connecting portion 31 connects the pixel island B and the protection unit 40 corresponding to the pixel island B, and the second connecting portion 32 connects the protection unit 40 corresponding to the pixel island A and the protection unit 40 corresponding to the pixel island B, and the protection unit 40 has conductivity, thereby realizing the connection between the pixel islands 20, and realizing stretching and signal transmission.

[0053] By arranging the protection unit 40 spaced apart from the pixel island 20, the first connecting portion 31 of the connecting bridge 30 connects the pixel island 20 and the protection unit 40, and the second connecting portion 32 connects the protection unit 40 and the adjacent protection unit 40, thereby ensuring that the pixel island 20 and the peripheral protection unit 40 have good stretchability when the display panel 100 is stretched and deformed, so that the display panel 100 can maintain good deformation ability. That is, the pixel island 20 and the peripheral protection unit 40 are connected by the first connecting portion 31, so that the pixel island 20 and the protection unit 40 have the same stretchability, thereby avoiding the decline of the stretchability of the display panel 100 due to the arrangement of the protection unit 40 around the pixel island 20, so that the display panel 100 can still maintain good stretchability.

[0054] In the embodiment of the present application, the shape of the pixel island 20 can be rectangular, square, diamond, polygon or shape with arc-shaped side, and the display panel 100 has at least intersecting first stretching direction X and second stretching direction Y. In the embodiment, the shape of the pixel island 20 is taken as an example to be described, and the pixel island 20 is taken as an example to be described in the form of a matrix arranged in multiple rows and multiple columns. Among them, the column direction of the matrix is the first stretching direction X, and the row direction of the matrix is the second stretching direction Y; two opposite sides of the pixel island 20 are parallel to the first stretching direction X, and the other two opposite sides are parallel to the second stretching direction Y.

[0055] The protective unit 40 is disconnected at the positions corresponding to the corners of the pixel island 20, forming a plurality of protective structures 41. The corner of the pixel island 20 refers to the vertex angle of the edge of the pixel island 20, that is, the angle formed between adjacent side edges of the pixel island 20. It can be understood that the protective structure 41 corresponds to one side edge of the pixel island 20, and each side edge of the pixel island 20 has one protective structure 41 corresponding thereto. The connecting bridge 30 is arranged in each stretching direction of the outer periphery of the pixel island 20 to connect the pixel islands 20 adjacent thereto, so that the plurality of pixel islands 20 are connected to form an overall stretchable display structure.

[0056] By disconnecting the protective unit 40 at the positions corresponding to the corners of the pixel island 20, a plurality of strip-shaped protective structures 41 are formed, that is, the protective structure 41 corresponding to each side edge of the pixel island 20, and the adjacent protective structures 41 are not connected and do not intersect, so that the protective unit 40 has good deformability while protecting the pixel island 20 from structural integrity under the action of external stretching force.

[0057] For example, in the embodiment, the protective unit 40 includes a first protective structure 411 extending along the first stretching direction X and a second protective structure 412 extending along the second stretching direction Y; of the four side edges of the pixel island 20, the two side edges extending along the first stretching direction X are the first side edges 21, and the two side edges extending along the second stretching direction Y are the second side edges 22.

[0058] By disconnecting the adjacent protective structures 41, the first protective structure 411 and the corresponding first side edge 21 of the pixel island 20 can maintain good stretchability through the corresponding first connecting part 31 to support the stretching, compression, or rotational deformation between the pixel island 20 and the peripheral protective unit 40. At the same time, the first protective structure 411 can generate resistance opposite to the first stretching direction X when the pixel island 20 is stretched, compressed, or bent in the first stretching direction X, thereby strengthening its resistance to deformation and protecting the pixel island 20 from structural damage under the action of the first stretching direction X.

[0059] By disconnecting the adjacent protective structures 41, the second protective structure 412 and the corresponding second side edge 22 of the pixel island 20 can maintain good stretchability through the corresponding first connecting part 31 to support the stretching, compression, or rotational deformation between the pixel island 20 and the peripheral protective unit 40. At the same time, the second protective structure 412 can generate resistance opposite to the second stretching direction Y when the pixel island 20 is stretched, compressed, or bent in the second stretching direction Y, thereby strengthening its resistance to deformation and protecting the pixel island 20 from structural damage under the action of the second stretching direction Y.

[0060] The protection structure 41 is parallel to the side of the corresponding pixel island 20, and the length of the orthographic projection of the protection structure 41 on the side of the corresponding pixel island 20 is less than the length of the side of the corresponding pixel island 20. Specifically, the first protection structure 411 is parallel to the corresponding first side 21, and the orthographic projection of the first protection structure 411 on the corresponding first side 21 does not exceed the corresponding first side 21. Similarly, the second protection structure 412 is parallel to the corresponding second side 22, and the orthographic projection of the second protection structure 412 on the corresponding second side 22 does not exceed the corresponding second side 22.

[0061] Through the above arrangement, when the pixel island 20 and the corresponding protection structure 41 are stretched, the stretching stress on the area between the side of the pixel island 20 and the corresponding protection structure 41 in the extension direction of the protection structure 41 is more balanced, thereby improving the stretchability between the pixel island 20 and the protection unit 40 and avoiding the problem of structural damage caused by uneven stress. Similarly, the stretching stress on the area between the corresponding protection structures 41 of the adjacent pixel islands 20 in the extension direction of the protection structure 41 is also more balanced, thereby improving the stretchability between the adjacent pixel islands 20 and improving the stretchability of the display panel 100. Moreover, by making the length of the orthographic projection of the protection structure 41 on the side of the corresponding pixel island 20 less than the length of the side of the corresponding pixel island 20, the problem of tip rupture or other film layer rupture of the protection structure 41 during deformation can be avoided during stretching and bending of the display panel 100, thereby protecting the protection structure 41 and the film layer in the area where the protection structure 41 is located from being damaged.

[0062] In other embodiments, the side of the pixel island 20 can also include an arc-shaped side, and correspondingly, the protection structure 41 includes an arc-shaped protection structure 41 corresponding to the arc-shaped side. Similarly, the orthographic projection of the arc-shaped protection structure 41 on the corresponding arc-shaped side does not exceed the arc-shaped side, and the arc-shaped protection structure 41 is parallel to the corresponding arc-shaped side, thereby maintaining the same technical effects as the above embodiments. For details, please refer to the above description, which will not be repeated here.

[0063] Please refer to FIG. 2, Figure 2FIG. 2 is a schematic diagram of a planar structure of a display panel according to a second embodiment of the present application. In this embodiment, the corners between adjacent sides of the pixel island 20 are chamfered at an angle θ. That is, the angle between the first side 21 and the second side 22 of the pixel island 20 is chamfered at an angle θ to form a straight chamfered angle θ or a circular chamfered angle θ, or a composite chamfered angle θ. By chamfering the corners between adjacent sides of the pixel island 20, that is, by not having sharp corners at the edge corners of the pixel island 20, the display panel 100 is further protected from damage at the corners of the pixel island 20 when the display panel 100 is stretched, compressed, bent, or rotated, and the problem of damage to other film layers caused by sharp corners is also avoided.

[0064] Referring to Figure 3 , Figure 3 FIG. 3 is a schematic diagram of a planar structure of a display panel according to a third embodiment of the present application. In this embodiment, each side of the pixel island 20 has a first extension 23, and the protection structure 41 has a second extension 42 and a third extension 43 on opposite sides of the pixel island 20. The first connection 31 connects the corresponding first extension 23 and the second extension 42, and the second connection 32 connects the corresponding two third extensions 43.

[0065] That is, the connection between the protection structure 41 and the connecting bridge 30 has an extension, and the connection between the pixel island 20 and the connecting bridge 30 also has an extension. By providing extensions at the connections between the protection structure 41 and the connecting bridge 30 and at the connections between the pixel island 20 and the connecting bridge 30, the connection reliability between the connecting bridge 30 and the protection structure 41 and the connection reliability between the connecting bridge 30 and the pixel island 20 are improved, the connection between the connecting bridge 30 and the protection structure 41 is more secure, and the connection between the connecting bridge 30 and the pixel island 20 is more secure, so that the contact position of the connecting bridge 30 and the protection structure 41 is less likely to be damaged, and the contact position of the connecting bridge 30 and the pixel island 20 is less likely to be damaged when the display panel 100 is stretched, compressed, bent, or rotated.

[0066] Referring to Figure 4 , Figure 4 FIG. 4 is a schematic diagram of a planar structure of a display panel according to a fourth embodiment of the present application. Further, in this embodiment, the first extensions 23, the second extensions 42, and the third extensions 43 arranged along the first stretching direction X are located on the same first straight line L1, and the first straight line L1 is parallel to the first stretching direction X. The first extensions 23, the second extensions 42, and the third extensions 43 arranged along the second stretching direction Y are located on the same second straight line L2, and the second straight line L2 is parallel to the second stretching direction Y.

[0067] It can be understood that the first, second and third epitaxial parts 23, 42 and 43 arranged along the first stretching direction X are located on the same first straight line L1, so that the second side edge 22 and the second protective structure 412 extending along the second direction, and the connecting position of the connecting bridge 30 are located on the same straight line along the first stretching direction X, thereby effectively avoiding the tendency of the second protective structure 412 to twist when the display panel 100 is stretched or compressed in the first stretching direction X. Similarly, the first, second and third epitaxial parts 23, 42 and 43 arranged along the second stretching direction Y are located on the same second straight line L2, so that the first side edge 21 and the first protective structure 411 extending along the first direction, and the connecting position of the connecting bridge 30 are located on the same straight line along the second stretching direction Y, thereby effectively avoiding the tendency of the first protective structure 411 to twist when the display panel 100 is stretched or compressed in the second stretching direction Y. Through the above arrangement, the display panel 100 can maintain a relatively flat state when stretched or compressed, thereby avoiding the problem of deformation of the display image, so as to reduce the influence of the display effect of the display panel 100 when stretched or compressed.

[0068] Please refer to Figures 5-7 , Figure 5 is Figure 4 A cross-sectional structure schematic view of the display panel in the A-A direction in the embodiment, Figure 6 is Figure 4 A cross-sectional structure schematic view of the display panel in the B-B direction in the embodiment, Figure 7 is Figure 4 A cross-sectional structure schematic view of the display panel in the C-C direction in the embodiment. In the embodiment, the pixel island 20 includes a driving layer 51, a planar layer 52, an anode electrode 53, a pixel definition layer 54 and a conductive isolation structure which are sequentially stacked.

[0069] The pixel definition layer 54 has a plurality of pixel openings 541, the pixel openings 541 correspond one-to-one to the anode electrodes 53 and expose the anode electrodes 53; the conductive isolation structure is arranged on the side of the pixel definition layer 54 away from the driving layer 51 and surrounds the pixel openings 541; the light-emitting layer 56 and the cathode electrode 57 are sequentially stacked in the pixel openings 541 to form a sub-pixel P with the corresponding anode electrode 53; the cathode electrode 57 is in contact with and electrically connected to the conductive isolation structure. The protection unit 40 is arranged in the same layer as the conductive isolation structure, and the first connecting part 31 connects the conductive isolation structure at the edge of the pixel island 20 and the protection structure 41.

[0070] It should be noted that the conductive isolation structure located at the edge region of the pixel island 20 is the structure of the side edge of the pixel island 20 mentioned above, that is, the shape of the conductive isolation structure located at the edge region of the pixel island 20 is the same as the shape of the side edge of the pixel island 20, and the connection bridge 30 connects the conductive isolation structure at the edge region of the pixel island 20 and the protection unit 40 at the periphery of the pixel island 20. The connection bridge 30 is specifically a curved distribution of signal lines with good deformation ability, which can be specifically a conductive metal line.

[0071] Specifically, the conductive isolation structure includes a first conductive part 551 and a first insulating top part 552; the first conductive part 551 is arranged on the side of the pixel definition layer 54 away from the driving layer 51 and surrounds the pixel opening 541; and the first insulating top part 552 covers the side of the first conductive part 551 away from the driving layer 51, shields the first conductive part 551, and extends out of the first conductive part 551 in a direction parallel to the pixel definition layer 54. The cathode electrode 57 is arranged in the pixel opening 541 and covers the light-emitting layer 56 to form a sub-pixel P. At the same time, the cathode electrode 57 is in contact with the first conductive part 551 to form an electrical connection, so that the cathode electrodes 57 of adjacent sub-pixels P are electrically connected through the first conductive part 551 to form a front electrode, which is beneficial to the transmission of the cathode signal and avoids display disorder caused by different potentials of the cathode electrodes 57 of the sub-pixels P in the pixel island 20. By covering the side of the first conductive part 551 away from the driving layer 51 with the first insulating top part 552, shielding the first conductive part 551, and extending out of the first conductive part 551 in a direction parallel to the pixel definition layer 54, a overhanging structure is formed, so that in the process of evaporating the light-emitting material to form the light-emitting layer 56, the first insulating top part 552 plays the same role as the mask, so that the mask can be replaced, and the evaporation of the light-emitting layer 56 can be realized without the mask, which can effectively improve the pixel opening 541 rate and production cost.

[0072] Specifically, the protection structure 41 has a similar film layer structure to the conductive isolation structure, and the protection structure 41 includes a second conductive part 553 and a second insulating top part 554; the second conductive part 553 is arranged in the same layer as the first conductive part 551 and is spaced apart, and the second insulating top part 554 is arranged on the side of the first conductive part 551 away from the pixel definition layer 54. Through the above arrangement, when the display panel 100 is manufactured, the protection structure 41 can be manufactured at the same time as the conductive isolation structure in the process of manufacturing the conductive isolation structure, without the need to increase a special process. Specifically, the materials of the first conductive part 551 and the second conductive part 553 can be metal materials with good conductivity, and the first insulating top part 552 and the second insulating top part 554 can be inorganic insulating materials, so that the protection structure 41 has good conductivity and anti-deformation ability.

[0073] Specifically, the first connecting part 31 connects the adjacent first conductive part 551 and the second conductive part 553, and the second connecting part 32 connects two adjacent second conductive parts 553 corresponding to the adjacent pixel islands 20, so that the cathode signal can be transmitted through the connecting bridge 30 and the protection unit 40.

[0074] Further, as shown in Figure 5 , the first insulating top 552 extends the first conductive part 551 from the side close to the pixel opening 541 in the direction parallel to the pixel definition layer 54, and the side of the first insulating top 552 away from the pixel opening 541 does not exceed the first conductive part 551. Among them, by making the side of the first insulating top 552 close to the pixel opening 541 extend the first conductive part 551 in the direction parallel to the pixel definition layer 54, a cantilever structure is formed to support the realization of mask-free evaporation of the light-emitting layer 56. By making the side of the first insulating top 552 away from the pixel opening 541 not exceeding the first conductive part 551, the first insulating top 552 avoids shielding the area of the side of the first conductive part 551 close to the second conductive part 553, thereby affecting the manufacturing of the first connecting part 31.

[0075] As shown in Figure 5 and Figure 7 , the second insulating top 554 does not exceed the second conductive part 553 in the orthogonal projection on the second conductive part 553. That is, the second insulating top 554 does not exceed the second conductive part 553 in the direction parallel to the pixel definition layer 54, thereby avoiding the second insulating top 554 shielding the area of the side of the second conductive part 553 close to the pixel island 20 and the area of the side of the second conductive part 553 away from the pixel island 20, and further avoiding affecting the manufacturing of the first connecting part 31 and the second connecting part 32 due to shielding.

[0076] Please refer to Figure 8 , Figure 8 is Figure 4 , another cross-sectional structure schematic diagram of the display panel in A-A direction. In this embodiment, the pixel island 20 further includes an encapsulation structure 58 arranged in the pixel opening 541 to encapsulate and protect the sub-pixel P, thereby avoiding the sub-pixel P structure from being damaged, and avoiding the external water and oxygen from invading to cause the light-emitting layer 56 to be damaged, thereby affecting the service life of the sub-pixel P.

[0077] Specifically, the encapsulation structure 58 includes a first encapsulation layer 581, a second encapsulation layer 582 and a third encapsulation layer 583 arranged in a stack. The first encapsulation layer 581 and the third encapsulation layer 583 are made of inorganic insulating materials such as oxide or nitride, for example, aluminum oxide (Al2O3), silicon oxide (SiO2), SiNx (x is a non-zero natural number) inorganic material, to block water and oxygen and improve mechanical strength. The first encapsulation layer 581 covers the surface of the cathode electrode 57 and extends to the side surface of the first insulating top 552 away from the pixel definition layer 54. The second encapsulation layer 582 is made of organic insulating materials such as polyimide (PI), polyethylene terephthalate (PET) and the like. The second encapsulation layer 582 fills the pixel opening 541 and planarizes the pixel opening 541, and can provide stress buffering to improve the flexibility of the display panel 100. The third encapsulation layer 583 is arranged on the side of the second encapsulation layer 582 away from the first encapsulation layer 581, and covers the first encapsulation layer 581 and the second encapsulation layer 582 to further improve the water and oxygen blocking capability.

[0078] Please refer to Figure 9 , Figure 9 is a structural schematic diagram of a display device provided in an embodiment of the present application. In the embodiment, a display device is provided, which includes a display panel 100 and a control circuit board 200. The display panel 100 is the display panel 100 provided in the above embodiments, and has the same or similar structure and function as the display panel 100 provided in the above embodiments and can achieve the same technical effects. For details, reference can be made to the above detailed description, which will not be repeated here. The control circuit board 200 is electrically connected with the display panel 100, specifically electrically connected with the driving substrate, and is used for controlling the display panel 100 to display corresponding images in a corresponding control mode.

[0079] The display device has good stretchable deformation performance, and can better protect the structural reliability of the pixel island 20 when performing stretchable deformation, improve the deformation resistance of the pixel island 20, and avoid the problem of poor display effect caused by distortion or damage of the structure of the pixel island 20. Specifically, the display device can be any electronic device with display function such as mobile phone, tablet computer, notebook computer, electronic paper, television, vehicle-mounted display screen, etc.

[0080] The above is only an embodiment of the present application, and does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A display panel, comprising: a plurality of pixel islands, each of the pixel islands comprising at least one sub-pixel; a connecting bridge stretchably connected between two adjacent pixel islands; characterized in that the display panel further comprises: a protection unit arranged around the pixel islands and spaced apart from the pixel islands, for generating a resistance to stretching deformation when the display panel is stretched; the protection unit is broken at positions corresponding to corners of the pixel islands, forming a plurality of protection structures; the connecting bridge comprises a first connecting part and a second connecting part, the first connecting part connects the pixel island and the protection unit, the second connecting part connects the protection unit and an adjacent protection unit, and the protection unit has conductivity; wherein the pixel island comprises a driving layer, a flat layer, an anode electrode, a pixel definition layer and a conductive isolation structure arranged in sequence; the pixel definition layer has a plurality of pixel openings, the pixel openings correspond one-to-one to the anode electrodes and expose the anode electrodes; the conductive isolation structure is arranged on a side of the pixel definition layer away from the driving layer and surrounds the pixel openings; a light-emitting layer and a cathode electrode are arranged in sequence in the pixel opening to form the sub-pixel with the corresponding anode electrode; the cathode electrode is in contact with and electrically connected to the conductive isolation structure; the protection unit is arranged in the same layer as the conductive isolation structure, and the first connecting part connects the conductive isolation structure at the edge of the pixel island and the protection structure.

2. The display panel of claim 1, wherein, the protection structure is parallel to the side edge of the corresponding pixel island, and the length of the orthographic projection of the protection structure on the side edge of the corresponding pixel island is less than the length of the side edge of the corresponding pixel island.

3. The display panel of claim 1, wherein, the corners between adjacent side edges of the pixel island are chamfered.

4. The display panel of claim 1, wherein, each side edge of the pixel island has a first extension part, the protection structure has a second extension part and a third extension part near and away from the opposite sides of the pixel island respectively; the first connecting part connects the corresponding first extension part and second extension part, and the second connecting part connects the corresponding two third extension parts.

5. The display panel of claim 4, wherein, the display panel has at least a first stretching direction and a second stretching direction intersecting each other; the first extension part, the second extension part and the third extension part arranged along the first stretching direction are located on a same first straight line, and the first straight line is parallel to the first stretching direction; the first extension part, the second extension part and the third extension part arranged along the second stretching direction are located on a same second straight line, and the second straight line is parallel to the second stretching direction.

6. The display panel of claim 1, wherein, the shape of the pixel island is polygonal, and the protection structure corresponds one-to-one to the side edge of the pixel island; or the side edge of the pixel island comprises an arc-shaped edge, and the protection structure comprises an arc-shaped protection structure corresponding to the arc-shaped edge.

7. The display panel of claim 1, wherein, The conductive isolation structure comprises a first conductive part and a first insulating top part; the first conductive part is arranged on the side of the pixel definition layer away from the driving layer and surrounds the pixel opening; the first insulating top part is arranged on the side of the first conductive part away from the driving layer, covers the first conductive part and extends out of the first conductive part in the direction parallel to the pixel definition layer; The protection structure comprises a second conductive part and a second insulating top part; the second conductive part is arranged in the same layer as the first conductive part and is spaced apart; the second insulating top part is arranged on the side of the first conductive part away from the pixel definition layer; The first connecting part connects the first conductive part and the second conductive part of adjacent pixel islands, and the second connecting part connects the second conductive parts of two adjacent pixel islands.

8. The display panel of claim 7, wherein, The side of the first insulating top part close to the pixel opening extends out of the first conductive part in the direction parallel to the pixel definition layer, and the side of the first insulating top part away from the pixel opening does not exceed the first conductive part; the orthographic projection of the second insulating top part on the second conductive part does not exceed the second conductive part.

9. A display panel, comprising: a plurality of pixel islands, each of which comprises at least one sub-pixel; a connecting bridge, which is stretchably connected between two adjacent pixel islands; characterized in that the display panel further comprises: a protection unit, which surrounds the pixel islands and is arranged spaced apart from the pixel islands, and is used to generate a resistance to stretching deformation when the display panel is stretched and deformed; the protection unit is disconnected at positions corresponding to corners of the pixel islands to form a plurality of protection structures; the connecting bridge comprises a first connecting part and a second connecting part, the first connecting part connects the pixel island and the protection unit, the second connecting part connects the protection unit and the adjacent protection unit, and the protection unit has conductivity; wherein each side of the pixel island has a first extension part, the protection structure has a second extension part and a third extension part close to and away from the opposite sides of the pixel island respectively; the first connecting part connects the corresponding first extension part and second extension part, and the second connecting part connects the corresponding two adjacent third extension parts.

10. A display device, characterized by comprising: comprising: a display panel, which is the display panel according to any one of claims 1-9; a control circuit board, which is electrically connected with the display panel and is used to control the display panel to display corresponding images.

Images