Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a plurality of pixel islands, wherein each pixel island comprises at least one sub-pixel; the connecting bridges are connected between two adjacent pixel islands in a stretchable manner; and the protection unit is arranged around the pixel islands in a surrounding manner, is spaced from the pixel islands, and is used for generating resistance for preventing tensile deformation when the display panel is subjected to tensile deformation. Wherein the connecting bridge comprises a first connecting part and a second connecting part, the first connecting part is connected with the pixel island and the protection unit, the second connecting part is connected with the protection unit and the adjacent protection unit, and the protection unit has conductivity. According to the display panel, the anti-deformation capability of the pixel island can be improved, so that the display effect of the display panel is improved.

Description

Technical Field

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

[0002] As an important technological upgrade of flexible display after folding, stretchable display panel has the characteristics of variability in any direction and stretchability and recovery. It has broad application prospects and can be applied in various fields such as consumer electronics, public display, medical, biology, wearable, gaming, fashion, and automotive.

[0003] In the current stretchable display panel, it usually includes an island-shaped light-emitting area and a bridge-shaped wiring area. Generally, the deformation ability of the wiring area is improved by designing curved wiring. However, due to the above structural design defects, the distortion of the wiring area will further cause the distortion of the island-shaped light-emitting area, reducing the reliability of the pixel unit of the island-shaped display area and worsening the display effect. Summary of the invention

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

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

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

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

[0008] The display panel further includes:

[0009] The protection unit is arranged around the pixel island and spaced apart from the pixel island, and is used to generate resistance to prevent tensile deformation when the display panel is stretched and deformed; the connecting bridge includes 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 is conductive.

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

[0011] In some embodiments, corners between adjacent sides of the pixel islands are chamfered.

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

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

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

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

[0016] In some embodiments, the shape of the pixel island is rectangular, square, diamond or polygonal, and the protection structure corresponds to the side of the pixel island one by one; or,

[0017] The side edge of the pixel island includes a curved side edge, and the protection structure includes a curved protection structure corresponding to the curved side edge.

[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 that are stacked in sequence;

[0019] The pixel definition layer has a plurality of pixel openings, the pixel openings correspond to the anode electrodes one by one, and the anode electrodes are exposed; the conductive isolation structure is arranged on a side of the pixel definition layer away from the driving layer, and surrounds the pixel openings; the light emitting layer and the cathode electrode are sequentially stacked in the pixel openings to form sub-pixels with the corresponding anode electrodes; the cathode electrode is in contact with the conductive isolation structure and is electrically connected;

[0020] The protection unit is arranged in the same layer as the conductive isolation structure, and the first connecting portion 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 portion and a first insulating top portion; the first conductive portion is disposed on a side of the pixel definition layer away from the driving layer and surrounds a pixel opening; the first insulating top portion covers a side of the first conductive portion away from the driving layer, shields the first conductive portion and extends the first conductive portion in a direction parallel to the pixel definition layer;

[0022] The protection structure comprises a second conductive part and a second insulating top; the second conductive part and the first conductive part are in the same layer and are arranged at intervals, and the second insulating top is arranged on a side of the first conductive part away from the pixel definition layer;

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

[0024] In some embodiments, a first conductive portion is extended from a side of the first insulating top close to the pixel opening 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 portion; an orthographic projection of the second insulating top on the second conductive portion does not exceed the second conductive portion.

[0025] In order to solve the above technical problem, the second technical solution provided by the present application is to provide a display device. The display device includes:

[0026] The display panel is the display panel provided by the above technical solution;

[0027] The control circuit board is electrically connected to the display panel and is used to control the display panel to display corresponding images.

[0028] Beneficial effects of the present application: Different from the prior art, the present application provides a display panel and a display device, wherein the display panel includes a plurality of pixel islands and a connecting bridge, wherein the connecting bridge connects adjacent pixel islands, thereby performing signal transmission and realizing image display. The display panel also includes a protection unit, wherein the protection unit is arranged around the pixel island to generate resistance to prevent tensile deformation when the display panel is tensilely deformed, so that the protection unit has good deformation resistance, can effectively reduce the influence of the stress generated by tensile deformation on the pixel island, thereby protecting the pixel island from structural damage caused by deformation stress, and improving the deformation resistance of the pixel island. At the same time, by arranging the protection unit and the pixel island at intervals, the first connection part of the connecting bridge connects the pixel island and the protection unit, and the second connection part connects the protection unit and the adjacent protection unit, thereby realizing the connection between the pixel islands, and when the display panel is stretched and deformed, it can not only protect the pixel island from maintaining structural integrity under the action of external force, but also ensure that the pixel island and the peripheral protection unit maintain good stretchability, so that the display panel can maintain good deformation ability; in addition, by making the protection unit conductive, the first connection part and the second connection part are electrically connected through the protection unit, thereby realizing signal connection and transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

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

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

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

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

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

[0035] Figure 6 yes Figure 4 A schematic diagram of a cross-sectional structure of a display panel along the BB direction in the embodiment;

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

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

[0038] Fig. 9 It is a schematic diagram of the structure of a display device provided in one embodiment of the present application.

[0039] Reference numerals:

[0040] 100, display panel; 10, flexible substrate; 20, pixel island; 21, first side; 22, second side; 23, first extension; 30, connecting bridge; 31, first connecting part; 32, second connecting part; 40, protection unit; 41, protection structure; 411, first protection structure; 412, second protection structure; 42, second extension; 43, third extension; 51, driving layer; 52, flat layer; 53, anode electrode; 54, pixel definition layer; 541, pixel opening; 55, conductive isolation layer; 551, first conductive part; 552, first insulating top; 553, second conductive part; 554, second insulating top; 56, light-emitting layer; 57, cathode electrode; 58, packaging structure; 581, first packaging layer; 582, second packaging layer; 583, third packaging 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 scheme of the embodiment of the present application is described in detail below in conjunction with the drawings of the specification.

[0043] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0046] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

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

[0048] See also Figure 1 , Figure 11 is a schematic diagram of a planar structure of a display panel provided in the first embodiment of the present application. In this embodiment, a display panel 100 is provided, and the display panel 100 includes a plurality of pixel islands 20 , a connecting bridge 30 and a protection unit 40 .

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

[0050] Furthermore, the display panel 100 further includes a protection unit 40. The protection unit 40 is disposed around the pixel island 20 and is spaced apart from the pixel island 20, and is used to generate resistance to prevent tensile deformation when the display panel is stretched and deformed. The connection bridge 30 includes a first connection portion 31 and a second connection portion 32, the first connection portion 31 connects the pixel island 20 and the protection unit 40, and the second connection portion 32 connects the protection unit 40 and the adjacent protection unit 40, and the protection unit is conductive.

[0051] Specifically, the protection unit 40 is arranged around the pixel island 20, and when the display panel 100 undergoes tensile deformation, the protection unit can be used to generate a resistance in the opposite direction of the tensile stress, thereby having the effect of preventing the tensile deformation in the tensile direction, that is, the deformation resistance of the protection unit can effectively reduce the influence of the stress generated by the tensile deformation on the pixel island 20, thereby protecting the pixel island 20 from structural damage caused by deformation stress, thereby improving the deformation resistance of the pixel island 20.

[0052] Further, the protection unit 40 is spaced apart from the pixel island 20, that is, there is a preset width of space between the protection unit 40 and the pixel island 20. In addition, the connection bridge 30 includes a first connection portion 31 and a second connection portion 32; one end of the first connection portion 31 is connected to the outside 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 connection 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 adjacent protection units 40 share the same second connection portion 32, that is, the second connection portions 32 in two adjacent protection units 40 are the same second connection portion 32. Alternatively, it can also be understood that two adjacent pixel islands 20 are pixel island A and pixel island B, respectively, and the connecting bridge 30 between the sides of pixel island A and pixel island B that are close to each other includes two first connecting parts 31 and a second connecting part 32, wherein one first connecting part 31 connects pixel island A and the corresponding protection unit 40, the other first connecting part 31 connects pixel island B and the corresponding protection unit 40, and the second connecting part 32 connects the protection unit 40 corresponding to pixel island A and the protection unit 40 corresponding to pixel island B, and the protection unit 40 is conductive, thereby realizing the connection between the pixel islands 20, so that stretching and signal transmission can be performed.

[0053] By arranging the protection unit 40 and the pixel island 20 at intervals, the first connection portion 31 of the connection bridge 30 connects the pixel island 20 and the protection unit 40, and the second connection portion 32 connects the protection unit 40 and the adjacent protection unit 40, so that when the display panel 100 is stretched and deformed, it can not only protect the pixel island 20 to maintain structural integrity under the tensile action of external force, but also ensure that the pixel island 20 and the peripheral protection unit 40 have good stretchability, 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 through the first connection portion 31, so that the pixel island 20 and the protection unit 40 have the same stretchability, thereby avoiding the decrease in the stretchability of the display panel 100 due to the provision of the protection unit 40 on the periphery of 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 a rectangle, a square, a rhombus, a polygon or a shape with curved edges, and the display panel 100 has at least a first stretching direction X and a second stretching direction Y that intersect. In the present embodiment, the shape of the pixel island 20 is a rectangle as an example for description, and specifically, a plurality of pixel islands 20 are arranged in a matrix of multiple rows and columns as an example for description. 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 of the 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] Among them, the protection unit 40 is disconnected at the corresponding position of the corner of the pixel island 20 to form a plurality of protection 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 the adjacent sides of the pixel island 20. It can be understood that the protection structure 41 corresponds to the side of the pixel island 20 one by one, and each side of the pixel island 20 has a protection structure 41 opposite to it. A connecting bridge 30 is provided in each stretching direction on the periphery of the pixel island 20 to connect the adjacent pixel islands 20, so that a plurality of pixel islands 20 are connected to form an integral stretchable display structure.

[0056] By disconnecting the protection unit 40 at the corresponding position of the corner of the pixel island 20, a plurality of strip-shaped protection structures 41 are formed, that is, a protection structure 41 corresponding to each side of the pixel island 20, and adjacent protection structures 41 are not connected and do not intersect with each other, so that the protection unit 40 can protect the pixel island 20 while maintaining structural integrity under the action of external tensile force, while also having good deformability.

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

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

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

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

[0061] Through the above arrangement, when the sides of the pixel island 20 and the corresponding protective structure 41 are stretched, the tensile stress in the area between the side of the pixel island 20 and the corresponding protective structure 41 along the extension direction of the protective structure 41 can be more balanced, thereby improving the stretchability between the pixel island 20 and the protective unit 40, and avoiding the problem of structural damage due to uneven force. Similarly, on the side where the adjacent pixel islands 20 are close to each other, the tensile stress in the area between the corresponding protective structures 41 along the extension direction of the protective structure 41 will also be more balanced, improving the stretchability between the adjacent pixel islands 20, thereby improving the stretchability of the display panel 100. Moreover, by making the length of the positive projection of the protective structure 41 on the side of the corresponding pixel island 20 smaller than the length of the side of the corresponding pixel island 20, when the display panel 100 is stretched and bent, it is possible to avoid the problem of tip rupture of the protective structure 41 or rupture of other film layers when the deformation occurs, so as to protect the protective structure 41 and the film layer in the area where the protective structure 41 is located from being damaged.

[0062] In other embodiments, the side of the pixel island 20 may further include an arc-shaped side, and accordingly, the protection structure 41 includes an arc-shaped protection structure 41 corresponding to the arc-shaped side. Similarly, the positive 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 effect as the above embodiment, and the details can be referred to the above introduction, which will not be repeated here.

[0063] Please refer to 2, Figure 2: is a schematic diagram of the planar structure of the display panel provided in the second embodiment of the present application. In this embodiment, the corners between the adjacent sides of the pixel island 20 are chamfered θ. That is, the angle between the first side 21 and the second side 22 of the pixel island 20 is chamfered θ to form a straight chamfer θ or a circular chamfer θ, or a composite chamfer θ. By making the corners between the adjacent sides of the pixel island 20 chamfered θ, that is, there are no sharp corners at the edge corners of the pixel island 20, when the display panel 100 is stretched, compressed, bent, or rotated, it is further ensured that the corners of the pixel island 20 are not damaged, and the problem of rupture of other film layers caused by sharp corners can also be avoided.

[0064] See also Figure 3 , Figure 3 1 is a schematic diagram of the planar structure of the display panel provided in the third embodiment of the present application. In this embodiment, each side of the pixel island 20 has a first extension portion 23, and the protection structure 41 has a second extension portion 42 and a third extension portion 43 on opposite sides close to and away from the pixel island 20, respectively; the first connecting portion 31 connects the corresponding first extension portion 23 and the second extension portion 42, and the second connecting portion 32 connects the corresponding two adjacent third extension portions 43.

[0065] That is, the connection between the protective structure 41 and the connecting bridge 30 has an extension portion, and the connection between the side of the pixel island 20 and the connecting bridge 30 also has an extension portion. By providing the extension portion at the connection between the protective structure 41 and the connecting bridge 30 and at the connection between the pixel island 20 and the connecting bridge 30, the connection reliability between the connecting bridge 30 and the protective structure 41 and the connection reliability between the connecting bridge 30 and the pixel island 20 are improved, so that the connection between the connecting bridge 30 and the protective structure 41 is more secure, and the connection between the connecting bridge 30 and the pixel island 20 is more secure, so that when the display panel 100 undergoes stretching, compression, bending, or rotational deformation, the contact position between the protective connecting bridge 30 and the protective structure 41 is not easily damaged, and the contact position between the protective connecting bridge 30 and the pixel island 20 is not easily damaged.

[0066] See also Figure 4 , Figure 4 : is a schematic diagram of the planar structure of the display panel provided in the fourth embodiment of the present application. Further, in this embodiment, the first extension portion 23, the second extension portion 42 and the third extension portion 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 extension portion 23, the second extension portion 42 and the third extension portion 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 extension 23, the second extension 42, and the third extension 43 arranged along the first stretching direction X are located on the same first straight line L1, so that the second side 22 extending along the second direction and the second protective structure 412 are connected to the connecting bridge 30 at the same straight line along the first stretching direction X, so that when the display panel 100 is stretched or compressed in the first stretching direction X, the second protective structure 412 can be effectively prevented from twisting. Similarly, the first extension 23, the second extension 42, and the third extension 43 arranged along the second stretching direction Y are located on the same second straight line L2, so that the first side 21 extending along the first direction and the first protective structure 411 are connected to the connecting bridge 30 at the same straight line along the second stretching direction Y, so that when the display panel 100 is stretched or compressed in the second stretching direction Y, the first protective structure 411 can be effectively prevented from twisting. Through the above configuration, the display panel 100 can remain relatively flat when stretched or compressed, thereby avoiding the problem of deformation of the displayed image and reducing the impact on the display effect of the display panel 100 when stretched or compressed.

[0068] See also Figure 5-7 , Figure 5 yes Figure 4 The cross-sectional structure diagram of the display panel in the AA direction in the embodiment is as follows: Figure 6 yes Figure 4 The cross-sectional structure diagram of the display panel in the BB direction in the embodiment, Figure 7 yes Figure 4 Schematic diagram of the cross-sectional structure of the display panel in the CC direction in the embodiment. In this 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 stacked in sequence.

[0069] The pixel definition layer 54 has a plurality of pixel openings 541, which correspond to the anode electrodes 53 one by one 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 opening 541; the light emitting layer 56 and the cathode electrode 57 are sequentially stacked in the pixel opening 541 to form a sub-pixel P with the corresponding anode electrode 53; the cathode electrode 57 is in contact with the conductive isolation structure and is electrically connected. The protection unit 40 is arranged in the same layer as the conductive isolation structure, and the first connection portion 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 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 of the pixel island 20, and the connecting bridge 30 connects the conductive isolation structure at the edge region of the pixel island 20 with the protection unit 40 outside the pixel island 20. The connecting bridge 30 is specifically a signal trace with a curved distribution having good deformation ability, and the signal trace can specifically be a conductive metal line.

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

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

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

[0074] Furthermore, if Figure 5 As shown, the side of the first insulating top 552 close to the pixel opening 541 extends the first conductive portion 551 in a 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 portion 551. By extending the first conductive portion 551 in a direction parallel to the pixel definition layer 54 on the side of the first insulating top 552 close to the pixel opening 541, a hanging structure is formed for evaporation to form the light-emitting layer 56, thereby supporting maskless evaporation. By ensuring that the side of the first insulating top 552 away from the pixel opening 541 does not exceed the first conductive portion 551, it is avoided that the first insulating top 552 blocks the area of ​​the first conductive portion 551 close to the second conductive portion 553 and affects the production of the first connecting portion 31.

[0075] like Figure 5 and Figure 7 As shown, the orthographic projection of the second insulating top 554 on the second conductive portion 553 does not exceed the second conductive portion 553. That is, the second insulating top 554 does not exceed the second conductive portion 553 in a direction parallel to the pixel definition layer 54, thereby preventing the second insulating top 554 from shielding the area of ​​the second conductive portion 553 on the side close to the pixel island 20 and the area of ​​the second conductive portion 553 on the side away from the pixel island 20, thereby preventing the manufacturing of the first connecting portion 31 and the second connecting portion 32 from being affected by shielding.

[0076] See also Figure 8 , Figure 8 yes Figure 4 Schematic diagram of the cross-sectional structure of another embodiment of the display panel in the AA direction. In this embodiment, the pixel island 20 further includes an encapsulation structure 58 disposed in the pixel opening 541 to encapsulate and protect the sub-pixel P, thereby preventing the sub-pixel P structure from being damaged, and preventing the light-emitting layer 56 from being damaged due to the intrusion of external water and oxygen, thereby affecting the 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 which are stacked. The materials of the first encapsulation layer 581 and the third encapsulation layer 583 are made of inorganic insulating materials such as oxides or nitrides, such as aluminum oxide (Al2O3), silicon oxide (SiO2), and SiNx inorganic materials, where x is a non-zero natural number, 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 surface of the first insulating top 552 away from the pixel definition layer 54. The material of the second encapsulation layer 582 is an organic insulating material, such as polyimide (PI), polyethylene terephthalate (PET) and other materials. The second encapsulation layer 582 fills the pixel opening 541 and flattens the pixel opening 541, and can provide buffer stress to improve the flexibility of the display panel 100. The third encapsulation layer 583 is disposed on a 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 enhance the ability to block water and oxygen.

[0078] See also Fig. 9 , Fig. 9 : is a schematic diagram of the structure of a display device provided in one embodiment of the present application. In this embodiment, a display device is provided, and the display device includes a display panel 100 and a control circuit board 200. Among them, the display panel 100 is the display panel 100 provided in the above embodiment, and has the same or similar structure and function as the display panel 100 provided in the above embodiment, and can achieve the same technical effect. For details, please refer to the detailed description above, which will not be repeated here. The control circuit board 200 is electrically connected to the display panel 100, specifically to the drive substrate, and is used to control the display panel 100 so that the display panel 100 displays the corresponding image according to the corresponding control method.

[0079] The display device has good stretchable deformation performance, and when stretching and deforming, it can better protect the structural reliability of the pixel island 20, improve the anti-deformation ability of the pixel island 20, and avoid the problem of poor display effect caused by distortion or structural damage of the pixel island 20. Specifically, the display device can be any electronic device with display function, such as a mobile phone, a tablet computer, a laptop computer, an electronic paper, a television, a car display screen, etc.

[0080] The above are only implementation methods of the present application, and are not intended to limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are 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, which is stretchably connected between two adjacent pixel islands; Characterized in that the display panel further comprises: A protection unit is arranged around the pixel island and spaced apart from the pixel island, and is used to generate resistance to prevent tensile deformation when the display panel is stretched and deformed; the connecting bridge includes 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 is conductive.

2. The display panel according to claim 1, characterized in that: The protection unit is disconnected at the corresponding position of the corner of the pixel island to form a plurality of protection structures; the protection structure is parallel to the side of the corresponding pixel island, and the length of the positive projection of the protection structure on the side of the corresponding pixel island is less than the length of the side of the corresponding pixel island.

3. The display panel according to claim 2, characterized in that: The corners between adjacent sides of the pixel island are chamfered.

4. The display panel according to claim 2, characterized in that: Each side of the pixel island has a first extension portion, and the protection structure has a second extension portion and a third extension portion on opposite sides close to and away from the pixel island respectively; the first connecting portion connects the corresponding first extension portion and the second extension portion, and the second connecting portion connects the corresponding two adjacent third extension portions.

5. The display panel according to claim 4, characterized in that: The display panel has at least a first stretching direction and a second stretching direction intersecting each other; The first extension portion, the second extension portion and the third extension portion arranged along the first stretching direction are located on the same first straight line, and the first straight line is parallel to the first stretching direction; The first extension portion, the second extension portion, and the third extension portion arranged along the second stretching direction are located on the same second straight line, and the second straight line is parallel to the second stretching direction.

6. The display panel according to claim 2, characterized in that: The shape of the pixel island is a rectangle, a square, a diamond or a polygon, and the protection structure corresponds to the side of the pixel island one by one; or, The side edge of the pixel island includes an arc-shaped edge, and the protection structure includes an arc-shaped protection structure corresponding to the arc-shaped edge.

7. The display panel according to claim 2, characterized in that: The pixel island comprises a driving layer, a planar layer, an anode electrode, a pixel definition layer and a conductive isolation structure which are stacked in sequence; The pixel definition layer has a plurality of pixel openings, the pixel openings correspond to the anode electrodes one by one 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 opening; the light emitting layer and the cathode electrode are sequentially stacked 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 disposed in the same layer as the conductive isolation structure, and the first connecting portion connects the conductive isolation structure and the protection structure at the edge of the pixel island.

8. The display panel according to claim 7, characterized in that: The conductive isolation structure comprises a first conductive portion and a first insulating top portion; the first conductive portion is disposed on a side of the pixel definition layer away from the driving layer and surrounds the pixel opening; the first insulating top portion covers a side of the first conductive portion away from the driving layer, shields the first conductive portion and extends the first conductive portion in a direction parallel to the pixel definition layer; The protection structure comprises a second conductive portion and a second insulating top portion; the second conductive portion and the first conductive portion are in the same layer and are arranged at intervals, and the second insulating top portion is arranged on a side of the first conductive portion away from the pixel definition layer; The first connecting portion connects the adjacent first conductive portions and the second conductive portions, and the second connecting portion connects two adjacent second conductive portions corresponding to adjacent pixel islands.

9. The display panel according to claim 8, characterized in that: The first conductive portion is extended from a side of the first insulating top close to the pixel opening 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 portion; an orthographic projection of the second insulating top on the second conductive portion does not exceed the second conductive portion.

10. A display device, characterized in that: include: The display panel is a display panel as claimed in any one of claims 1 to 9; The control circuit board is electrically connected to the display panel and is used to control the display panel to display a corresponding image.

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