Film layer structure, array substrate and flexible display device

Abstract

The embodiment of the invention provides a film layer structure, an array substrate and a flexible display device, and relates to the technical field of display. The film layer structure comprises a flexible substrate; the multiple pixel island combinations are arranged in multiple rows and multiple columns in the row direction and the column direction, the row direction and the column direction intersect, each pixel island combination comprises at least one pixel island, the pixel islands are used for bearing pixels, the pixel island combinations in the adjacent rows are arranged in a staggered mode, and / or the pixel island combinations in the adjacent columns are arranged in a staggered mode; and the connecting wires are used for connecting the adjacent pixel island combinations in the same row, and / or connecting the adjacent pixel island combinations in the same column, and / or connecting the adjacent pixel island combinations in the adjacent rows, and / or connecting the adjacent pixel island combinations in the adjacent columns. According to the film layer structure provided by the embodiment of the invention, through staggered arrangement of the pixel island combinations, stretchable areas between the pixel island combinations are increased, so that the stretch rate of the film layer structure is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a film layer structure, an array substrate and a flexible display device. Background Art

[0002] Flexible organic light emitting diode (OLED) display technology is an emerging display technology that has many advantages that traditional display technologies do not have. Flexible organic light emitting diodes have the characteristics of low driving voltage, high luminous efficiency, fast response speed, wide viewing angle range, ultra-thinness and can be made into flexible devices. OLED technology has been widely used in smart phones, TVs, car displays, head-mounted displays, industrial control equipment displays, transparent displays, wearable displays and other fields. With the continuous advancement of technology and the increase in market demand, OLED display technology has become the mainstream trend of new display technology.

[0003] Nowadays, the mainstream of flexible organic light-emitting diode display technology is the island bridge design, which realizes the stretchability of the display. The island bridge structure provides an effective implementation solution for the design and manufacture of flexible displays, that is, the flexible polyimide (PI) substrate is dispersed in the form of islands, and these polyimide islands are connected by ribbon-like connecting bridges (Hinge) areas, where the pixel circuits are distributed on the polyimide islands, and the metal traces between the pixel circuits are distributed on the ribbon-like connecting bridge areas. The island bridge structure can effectively isolate tensile strain and protect hard functional components (such as light-emitting diodes or integrated circuits) from deformation.

[0004] However, how to improve pixel density is a huge challenge facing current flexible organic light-emitting diode display technology. The increase in pixel density will inevitably lead to a smaller area share and size of the interconnection bridge, which will compress the stretchable space and reduce the stretchable area, resulting in a lower stretch rate of the flexible organic light-emitting diode display panel. Summary of the invention

[0005] In view of this, the embodiment of the present application provides a film layer structure, which increases the distance between the pixel island combinations through the staggered arrangement of the pixel island combinations, thereby increasing the area of ​​the stretchable region. Due to the increase in the area of ​​the stretchable region, the stretching rate of the film layer is increased, thereby achieving the purpose of improving the stretching effect of the film layer.

[0006] In a first aspect, an embodiment of the present application provides a membrane layer structure, comprising: a flexible substrate; a plurality of pixel island combinations, arranged in multiple rows and columns along the row direction and the column direction, the row direction and the column direction intersecting, the pixel island combination comprising at least one pixel island, the pixel island being used to carry pixels, wherein the pixel island combinations of adjacent rows are staggered, and / or the pixel island combinations of adjacent columns are staggered; a plurality of connecting wires, the connecting wires being used to connect adjacent pixel island combinations in the same row, and / or for connecting adjacent pixel island combinations in the same column, and / or for connecting adjacent pixel island combinations in adjacent rows, and / or for connecting adjacent pixel island combinations in adjacent columns.

[0007] In one embodiment, the film layer structure further includes: a routing layer, in which connecting wires are arranged, the routing layer is located on a flexible substrate, and is located between adjacent pixel island combinations in the same column, and / or between adjacent pixel island combinations in adjacent rows, and / or between adjacent pixel island combinations in adjacent columns, wherein the routing layer is an insulating material; preferably, the routing layer is a stretchable insulating material; preferably, the pixel island includes an encapsulation layer, a light-emitting unit and a thin film transistor which are stacked in sequence, and the routing layer is located on the flexible substrate outside the encapsulation layer.

[0008] In one embodiment, when there is an intersection area between the connecting wires connecting the pixel island combination in the row direction and the connecting wires connecting the pixel island combination in the column direction, the film layer structure also includes: a redundant pixel island combination, located in the intersection area, the redundant pixel island combination includes at least one redundant pixel island; wherein the redundant pixel island combination does not carry pixels.

[0009] In one embodiment, there is a gap in the row direction of the pixel island combinations, and there is a first gap between the extension line in the column direction of the point on the edge of the pixel island combination on the side close to the adjacent column of the pixel island combination located in the Nth row and the extension line in the column direction of the point on the edge of the pixel island combination on the side far from the adjacent column, and there is a second gap between the adjacent column pixel island combinations located in the N-1th row, and the first gap at least partially overlaps with the second gap, wherein N≥2, M≥1; preferably, the length of the first gap is smaller than the length of the second gap; preferably, the length of the first gap is greater than the length of the second gap; preferably, adjacent pixel island combinations in adjacent rows are diagonally arranged; or adjacent pixel island combinations in adjacent columns are diagonally arranged.

[0010] In one embodiment, a connecting wire connecting two diagonally arranged pixel island combinations has an angle with the row direction, or a connecting wire connecting adjacent pixel island combinations in the same row is parallel to the row direction; a connecting wire connecting adjacent pixel island combinations in the same column is parallel to the column direction; preferably, the angle between the connecting wire connecting two diagonally arranged pixel island combinations and the row direction includes 45°.

[0011] In one embodiment, the pixel island combination includes an even number of pixel islands, and the even number of pixel islands are arranged in a matrix.

[0012] In one embodiment, the pixel island combination has chamfered or rounded corners; preferably, the pixel island combination is octagonal or elliptical.

[0013] In one embodiment, the material of the connecting wire is a stretchable conductive material and / or a non-stretchable conductive material; preferably, the connecting wire is a non-stretchable conductive material, and the shape of the connecting wire includes an arc.

[0014] In a second aspect, an embodiment of the present application provides an array substrate, comprising at least one film layer structure mentioned in the first aspect.

[0015] In a third aspect, an embodiment of the present application provides a flexible display device, comprising the array substrate mentioned in the second aspect.

[0016] The film layer structure provided by the embodiment of the present application includes: a flexible substrate; a plurality of pixel island combinations, arranged in multiple rows and columns along the row direction and the column direction, the row direction and the column direction intersect, the pixel island combination includes at least one pixel island, the pixel island is used to carry pixels, wherein the pixel island combination of adjacent rows is arranged in a staggered manner, and / or the pixel island combination of adjacent columns is arranged in a staggered manner; a plurality of connecting wires, the connecting wires are used to connect adjacent pixel island combinations of the same row, and / or to connect adjacent pixel island combinations of the same column, and / or to connect adjacent pixel island combinations of adjacent rows, and / or to connect adjacent pixel island combinations of adjacent columns. The embodiment of the present application increases the distance between the pixel island combinations by the staggered arrangement of the pixel island combination, thereby increasing the area of ​​the stretchable region. Due to the increase in the area of ​​the stretchable region, the stretching rate of the film layer is increased, thereby achieving the purpose of improving the stretching effect of the film layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other purposes, features and advantages of the present application will become more apparent by describing the embodiments of the present application in more detail in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation on the present application.

[0018] Figure 1a to Figure 1c 1 is a top view of a film layer structure provided by an embodiment of the present application.

[0019] Figure 2a Shown is a schematic cross-sectional structure diagram of a membrane layer structure provided in one embodiment of the present application.

[0020] Figure 2b Shown is a schematic structural diagram of a pixel island provided in one embodiment of the present application.

[0021] Figure 3 Shown is a schematic top view of a membrane layer structure provided in another embodiment of the present application.

[0022] Figures 4a to 4c Shown is a schematic structural diagram of a membrane layer structure provided in another embodiment of the present application.

[0023] Figure 5 Shown is a schematic structural diagram of a membrane layer structure provided in another embodiment of the present application.

[0024] Figure 6a and Figure 6b Shown is a schematic diagram of the shape of a pixel island combination provided in an embodiment of the present application.

[0025] Reference numerals:

[0026] 100, flexible substrate; 110, pixel island combination; 111, pixel island; 1111, encapsulation layer; 1112, light-emitting unit; 1113, thin film transistor; 120, connecting wire; 130, routing layer; 140, redundant pixel island combination. DETAILED DESCRIPTION

[0027] 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.

[0028] Figure 1a to Figure 1c FIG. 1 is a top view of a film structure provided by an embodiment of the present application. Figure 1a As shown, the film structure provided in the embodiment of the present application includes a flexible substrate 100, a plurality of pixel island assemblies 110, and a plurality of connecting wires 120; wherein, Figure 1a In the example, the pixel island combination includes one pixel island, that is, each pixel island combination 110 includes one pixel island. Specifically, the plurality of pixel island combinations 110 are arranged along the row direction ( Figure 1a The x direction is shown in the figure) and the column direction ( Figure 1a The pixel island combination 110 includes at least one pixel island 111, and the pixel island 111 is used to carry pixels. The pixel island combinations 110 of adjacent rows are arranged in a staggered manner and the pixel island combinations of adjacent columns are arranged in a staggered manner (such as Figure 1a In some embodiments, the pixel island assemblies 110 in adjacent rows are arranged in a staggered manner (eg Figure 1b In some embodiments, the pixel island combinations 110 in adjacent columns are arranged in a staggered manner (eg Figure 1c shown), Figure 1b In the example, a pixel island combination includes two pixel islands, that is, each pixel island combination 110 includes two pixel islands. A plurality of connecting wires 120 are provided, and the connecting wires 120 are used to connect adjacent pixel island combinations 110 in the same row, and / or to connect adjacent pixel island combinations 110 in the same column, and / or to connect adjacent pixel island combinations 110 in adjacent rows, and / or to connect adjacent pixel island combinations 110 in adjacent columns. It should be understood that Figure 1a to Figure 1b The connection method of the connecting wire 120 shown in the figure is only for reference, in order to facilitate the understanding of the embodiment of the present application, and the connection method of the multiple connecting wires mentioned above is a means known to those skilled in the art, and will not be described in detail here.

[0029] For example, the flexible substrate 100 may be made of elastic materials including elastic polyimide, polyurethane and other elastic materials. In this embodiment, there is no specific limitation on the material of the flexible substrate 100, as long as it can meet the stretchability required by the design.

[0030] Exemplarily, the material of the connecting wire 120 includes: at least one of a metal material, a carbon nanomaterial, a conductive polymer, and an ion conductor material. It should be understood that the connecting wire 120 may include a signal line, a power line, or a scan line, such as Scan / EM / Vre, data, VDD, etc. There may be multiple connecting wires 120 connected to the same pixel island combination 110 at both ends, and the routing functions of the multiple connecting wires 120 are the same. There is a certain distance between the multiple connecting wires 120 connected to the same pixel island combination 110 at both ends to reduce the possibility of electrical interference between the multiple connecting wires. This embodiment does not specifically limit the material of the connecting wire 120, as long as the connecting wire 120 made of this material can meet the conductivity requirements. The connecting wire 120 connecting the pixel island combination in the same row and / or the same column and the connecting wire 120 connecting the pixel island combination in different rows may be one or more, which can be set according to requirements. The embodiment of the present application does not further limit the number of connecting wires connecting the connecting wire pixel island combination in the same row and / or the same column and the number of connecting wires connecting the pixel island combination in different rows.

[0031] For example, in practical applications, other film layer structures can be set on the flexible substrate as needed. The pixel island combination 110 and the connecting wire 120 can be set on other film layer structures of the flexible substrate, or the pixel island combination 110 and the connecting wire 120 can be directly set on the flexible substrate. It can be flexibly set according to actual needs.

[0032] Exemplarily, the material of the pixel island assembly 110 may include a combination of any one or more materials such as polyimide PI, high elastic modulus silicone rubber, polymethyl methacrylate PMMA (PolyMethyl MethAcrylate, PMMA), etc. The high elastic modulus silicone rubber, for example, uses high elastic modulus polydimethylsiloxane (Polydimethylsiloxane, PDMS). This embodiment does not specifically limit the pixel island assembly material. The processing technology of the pixel island assembly material is mature or tends to be mature, and can better ensure the effectiveness and stability of the film layer structure. It should be understood that the pixel island assembly 110 has a packaging area, which is used to protect the pixel island from external forces and ensure the stability of the pixel island structure.

[0033] Exemplarily, the pixel island is for carrying the light-emitting pixels and the structures required for the light-emitting pixels, such as the light-emitting area and the TFT circuit. Exemplarily, in actual applications, one or more light-emitting pixel units are arranged on a pixel island. When multiple pixel light-emitting units are arranged on a pixel island, the multiple pixel light-emitting units are connected to each other, and the two ends of the connecting wire are respectively connected to the light-emitting pixel units. When multiple pixel light-emitting units are arranged on a pixel island, correspondingly, the number of connecting wires connecting the multiple pixel light-emitting units is multiple. In actual applications, the number of light-emitting units on the pixel island can be set according to demand to meet different application requirements. The embodiment of the present application does not further limit the number of light-emitting units set on the pixel island. Exemplarily, each pixel island includes a connection area connected to the connecting wire, and a connector connected to the connecting wire is arranged in the connection area. The connection area may include a rigid material or a rigid material wrapped by a stretchable material to ensure that the connection area will not be displaced during the stretching process, thereby avoiding the problem of unstable film structure caused by deformation.

[0034] The film layer structure provided in the embodiment of the present application increases the distance between the pixel island combinations by staggering the pixel island combinations between adjacent rows and / or adjacent columns, thereby increasing the area of ​​the stretchable region. Due to the increase in the area of ​​the stretchable region, the stretching rate of the film layer is increased, thereby achieving the purpose of improving the stretching effect of the film layer.

[0035] Figure 2a FIG. 1 is a schematic diagram of a cross-sectional structure of a film layer structure provided by an embodiment of the present application. Figure 2a As shown, the film layer structure further includes: a routing layer 130, and the connecting wire 120 is disposed on the routing layer, wherein the routing layer 130 is an insulating material. In some embodiments, the routing layer 130 is a stretchable insulating material.

[0036] For example, since the flexible substrate can be stretched, in actual application, the connecting wires 120 respectively connecting the pixel island combinations 110 in the row direction and the column direction may cross each other, and the routing layer 130 is provided to avoid mutual interference of electrical signals.

[0037] Exemplarily, when the routing layer 130 is a stretchable insulating material, it can deform together with the connecting wire 120 under tension, thereby avoiding the misalignment of the routing layer 130 due to stretching, thereby affecting the stability of the film structure and the functionality of the connecting wire.

[0038] Exemplarily, the connecting wire 120 may be disposed in an insulating material used for support, and the routing layer 130 is disposed outside the insulating material to protect the connecting wire from breaking.

[0039] In some embodiments, Figure 2b As shown, the pixel island 111 includes an encapsulation layer 1111, a light-emitting unit 1112 and a thin film transistor 1113 which are stacked in sequence, and the wiring layer 130 is located on the flexible substrate 100 outside the encapsulation layer 1111. Exemplarily, the light-emitting unit 1112 can be a light-emitting diode (LED). Exemplarily, the wiring layer 130 is located on the flexible substrate 100 outside the encapsulation layer 1111, that is, the area outside the encapsulation layer 1111 is a stretchable area. Exemplarily, the thin film transistor 1113 circuit overlaps with the light-emitting unit 1112, is surrounded by the annular encapsulation layer 1111, and the blank positions on the upper and lower sides (that is, the area outside the encapsulation layer 1111) are stretchable areas.

[0040] The membrane structure provided in the embodiment of the present application ensures the signal interference problem of the connecting wire in the application process by setting the routing layer. In addition, by selecting the routing layer as a stretchable material, the misalignment of the connecting wire caused by stretching in the application can be reduced, thereby ensuring the stability of the membrane structure and the functionality of the connecting wire.

[0041] Figure 3 The figure shows a schematic diagram of a top view of a membrane structure provided by another embodiment of the present application. Figure 1a Based on the embodiment shown, Figure 3 The embodiment shown is described below in detail. Figure 3 The embodiment shown and Figure 1a The differences between the embodiments shown are shown, and the similarities are not repeated. Figure 3 As shown, there is an intersection area A between the connecting wires connecting the pixel island combination in the row direction and the connecting wires connecting the pixel island combination in the column direction, and the film layer structure also includes: a redundant pixel island combination 140, located in the intersection area, the redundant pixel island combination includes at least one redundant pixel island; wherein the redundant pixel island combination 140 does not carry pixels.

[0042] Exemplarily, the redundant pixel island combination includes at least one redundant pixel island. Since the redundant pixel island combination does not carry pixels, the redundant pixel island mentioned in the embodiment of the present application is different from the pixel island mentioned above. The redundant pixel island can be a rigid structure or a rigid island structure.

[0043] Exemplarily, the material of the redundant pixel island combination 140 may include a combination of any one or more materials such as polyimide PI, high elastic modulus silicone rubber, polymethyl methacrylate PMMA (PolyMethyl MethAcrylate, PMMA for short), etc., wherein the high elastic modulus silicone rubber may adopt high elastic modulus polydimethylsiloxane (Polydimethylsiloxane, PDMS). It should be understood that the redundant pixel island material may be the same as or different from the pixel island material, and this embodiment does not impose specific restrictions on the redundant pixel island material.

[0044] Illustratively, the redundant pixel island combination 140 deforms less when stretched. Since the redundant pixel island combination 140 is located in the intersection area, deformation of the intersection area can be avoided, thereby achieving the purpose of ensuring the stability of the intersection area and avoiding signal interference caused by deformation of the connecting wire 120 in the intersection area.

[0045] For example, in practical applications, the number of pixel islands included in the redundant pixel island combination 140 can be selected according to requirements. For example, the redundant pixel island combination 140 includes one pixel island, which can reduce production costs and simplify production processes. It should be understood that the number of pixel islands included in the redundant pixel island combination can be selected according to requirements, and the embodiment of the present application does not further limit the number of pixel islands included in the redundant pixel island combination.

[0046] The film layer structure provided in the embodiment of the present application has an intersection area between the connecting wires connecting the pixel island combination in the row direction and the connecting wires connecting the pixel island combination in the column direction, including redundant pixel island combinations, thereby achieving the purpose of ensuring the stability of the intersection area.

[0047] Figures 4a to 4c FIG. 1 is a schematic diagram of a membrane structure provided by another embodiment of the present application. Figure 4a As shown, there is a first gap between the extension line in the column direction of a point on the edge of the pixel island combination located in the Nth row on the side close to the pixel island combination of the adjacent column and the extension line in the column direction of a point on the edge of the pixel island combination on the side far from the adjacent column, and there is a second gap between the pixel island combinations located in the adjacent columns of the N-1th row, and the first gap at least partially overlaps with the second gap, wherein N≥2, M≥1.

[0048] In some embodiments, Figure 4aAs shown, the length L1 of the first gap is greater than the length L2 of the second gap. Exemplarily, the pixel island combination may be a single pixel island, and the length of the gap between the pixel island combinations is less than the size of the side of the corresponding pixel island.

[0049] like Figure 4b and Figure 4c As shown, the length L1 of the first gap is smaller than the length L2 of the second gap. Exemplarily, the pixel island combination may be a single pixel island, and the length of the gap between the pixel island combinations is larger than the side size of the corresponding single pixel island.

[0050] In some embodiments, Figure 4a As shown, when the length L1 of the first gap is greater than the length L2 of the second gap, the pixel island combination of the Nth row and the pixel island combination of the N-1th row are arranged diagonally. Exemplarily, the pixel island combination may be a single pixel island or a plurality of pixel islands, and the pixel island combination of the Nth row and the pixel island combination of the N-1th row are arranged diagonally, which may be directly diagonal or obliquely diagonal.

[0051] Exemplarily, the pixel island group 110 includes two pixel islands, each pixel island includes one pixel island, adjacent pixel island groups 110 in adjacent rows are arranged diagonally, and adjacent pixel island groups 110 in adjacent columns are arranged diagonally. Figure 4b As shown, the pixel island group 110 includes two pixel islands, each pixel island includes one pixel island, and when the length L1 of the first gap is less than the length L2 of the second gap, adjacent pixel island groups 110 in adjacent columns are arranged diagonally.

[0052] Exemplarily, adjacent pixel island combinations in adjacent rows are arranged diagonally, and adjacent pixel island combinations in adjacent columns are arranged diagonally. Since the diagonal arrangement can increase the distance between adjacent pixel island combinations in the row direction and the column direction, the distance between adjacent pixel island combinations is increased, thereby further increasing the stretchable area, thereby achieving the purpose of improving the stretching rate.

[0053] The film layer structure provided in the embodiment of the present application increases the distance between adjacent pixel island combinations by diagonally arranging adjacent pixel island combinations in adjacent rows and / or diagonally arranging adjacent pixel island combinations in adjacent columns, thereby further increasing the stretchable area and achieving the purpose of improving the stretching rate.

[0054] In some embodiments, the connecting wire 120 connecting two diagonally arranged pixel island assemblies 110 is at an angle to the row direction; the connecting wire 120 connecting adjacent pixel island assemblies 110 in the same column is parallel to the column direction. Alternatively, the connecting wire 120 connecting adjacent pixel island assemblies 110 in the same row is parallel to the row direction; the connecting wire 120 connecting adjacent pixel island assemblies 110 in the same column is parallel to the column direction. In some embodiments, the angle between the connecting wire 120 connecting two diagonally arranged pixel island assemblies 110 and the row direction includes 45°.

[0055] Exemplarily, the connecting wire 120 connecting the two diagonally arranged pixel island combinations 110 has an angle with the row direction, and the connecting wire 120 connecting the two diagonally arranged pixel island combinations 110 includes a horizontal signal line required by the pixel circuit.

[0056] Exemplarily, the connecting wire 120 connecting two diagonally arranged pixel island combinations 110 has an angle with the row direction; the connecting wire connecting adjacent pixel island combinations in the same column is parallel to the column direction, which can avoid the intersection of the connecting wires in the row direction and the column direction, and avoid the existence of an intersection area of ​​the connecting wires, thereby avoiding possible signal interference of the connecting wires in the intersection area.

[0057] Exemplarily, the connecting wires 120 connecting adjacent pixel island combinations 110 in the same row are parallel to the row direction; the connecting wires 120 connecting adjacent pixel island combinations 110 in the same column are parallel to the column direction, which can simplify the connection method of the connecting wires, thereby simplifying the manufacturing process and reducing the manufacturing difficulty.

[0058] The film layer structure provided in the embodiment of the present application can be connected in different ways through different pixel island combinations, which can be selected according to needs, thereby simplifying the manufacturing process or avoiding signal interference problems in the crossing areas of the connecting wires.

[0059] Figure 5 FIG. 1 is a schematic diagram of a membrane structure provided by another embodiment of the present application. Figure 5 As shown, the pixel island combination includes an even number of pixel islands ( Figure 5 Taking 4 as an example), an even number of pixel islands are arranged in a matrix.

[0060] For example, the relative positions of an even number of pixel islands arranged in a matrix can be set as required. For ease of understanding, Figure 5 The positions of the pixel islands shown are for illustration only, and the embodiment of the present application does not further limit the relative positions of an even number of pixel islands arranged in a matrix.

[0061] The film layer structure provided in the embodiment of the present application arranges an even number of pixel islands in a matrix, which can increase the distance of the pixel island combination self-inspection, further increase the stretchable area, and improve the stretching rate.

[0062] In some embodiments, the pixel island combination has chamfered or rounded corners. Figure 6a and Figure 6b FIG. 1 is a schematic diagram of the shape of a pixel island combination provided by an embodiment of the present application. In some embodiments, the pixel island combination is an octagon ( Figure 6a ) or oval ( Figure 6b ). It should be understood that the shape of the pixel island combination can be any shape including chamfers or rounded corners, and the embodiment of the present application does not further limit the shape of the pixel island combination.

[0063] The shape of the pixel island combination of the film layer structure provided in the embodiment of the present application has chamfers or rounded corners, thereby achieving the purpose of reducing the area occupied by the right angles of the pixel island combination and increasing the area of ​​the stretchable region, further improving the stretch rate.

[0064] In some embodiments, Figure 5 The pixel island combination shown can be Figure 6a If the pixel island combination shape is , and the pixel island combination is at least one pixel island, it can be determined that the pixel island combination is diagonally arranged.

[0065] In one embodiment, the connecting wire is made of a stretchable conductive material and / or a non-stretchable conductive material. In some embodiments, when the connecting wire is made of a non-stretchable material, the connecting wire comprises an arc shape.

[0066] Exemplarily, the stretchable metal material is, for example, a metal wire made of a metal with good conductivity such as gold, silver, copper, aluminum, molybdenum, chromium, or a metal wire made of an alloy metal whose conductivity meets the design requirements. The stretchable metal material can also be made of metal nanomaterials, such as metal nanowires, nanoparticles, nanosheets, nanobelts and other metal nanomaterials. The stretchable wire can also be made of carbon nanomaterials, such as graphene, multilayer graphite, carbon nanotubes, carbon nanobelts and other carbon nanomaterials. Liquid metal materials can also be used to process stretchable wires, such as the use of gallium-containing alloys to make stretchable wires. Alternatively, conductive polymers and ionic conductor materials can also be used to process stretchable wires.

[0067] Exemplarily, when the connecting wire is a stretchable metal material, it can be obtained by a patterning process, for example, it can be made by a patterning process such as printing, printing, photolithography or laser etching. The above-mentioned patterning process of the connecting wire is well known to those skilled in the art and will not be described in detail here.

[0068] For example, in practical applications, when there are multiple connecting wires with two ends connected to the same pixel island, the operating voltage needs to be designed according to actual conditions to ensure that electrical interference of the connecting wires is avoided.

[0069] Exemplarily, the connecting wire can be obtained by a graphic process, for example, the connecting wire can be made by a graphic process such as printing, printing, photolithography or laser etching. The graphic processing technology of the above-mentioned connecting wire is well known to those skilled in the art and will not be described here. Generally speaking, the connecting wire can keep the conductivity unchanged or change slightly under the condition of stretching deformation. Even if the connecting wire has a certain conductivity change, it can be compensated by an external circuit, thereby meeting the application requirements of the film structure, that is, the brightness does not change significantly after stretching.

[0070] The material of the connecting wire of the membrane layer structure provided in the embodiment of the present application is a stretchable conductive material and / or a non-stretchable conductive material. The material of the connecting wire can be selected according to needs, thereby increasing the application scenarios of the connecting wire and further increasing the application scope of the membrane layer structure.

[0071] In addition, in some embodiments, the connecting wire is made of non-stretchable material, and the shape of the connecting wire includes an arc, which can ensure that the connecting wire is subjected to stress in a stretched state during application, ensure that the connecting wire will not break, and ensure the stability of the film structure during application.

[0072] An embodiment of the present application provides an array substrate, comprising at least one of the above-mentioned film layer structures. The array substrate provided in the embodiment of the present application has the same beneficial effects as the film layer structures provided in the above-mentioned embodiments, which will not be described in detail here.

[0073] An embodiment of the present application provides a flexible display device, comprising the above array substrate. The flexible display device provided in the embodiment of the present application has the same beneficial effects as the array substrate provided in the above embodiment, which will not be described in detail here.

[0074] The flexible display device provided in the above embodiment may be an electroluminescent display device, for example, an OLED display device or a quantum dot light emitting diode (QLED) display device. The flexible display device may be any product or component having a display function, for example, electronic paper, a mobile phone, a television, a display, a digital photo frame, a navigator, a watch or a bracelet, etc.

[0075] The phrases "one embodiment", "an embodiment", etc. mentioned in the specification indicate that the embodiment described may include a specific feature, structure or characteristic, but not every embodiment may include the specific feature, structure or characteristic. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments, whether explicitly or not explicitly described.

[0076] It should be understood that “on,” “above,” and “over” in this application should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above something” or “over,” but also may include the meaning of “above something” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0077] Additionally, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one component or feature to other components or features as shown in the figures. The spatially relative terms are intended to encompass different orientations of the component in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0078] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0079] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0080] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A film structure, characterized in that: include: Flexible substrate; A plurality of pixel island combinations are arranged on the flexible substrate and arranged in multiple rows and columns along a row direction and a column direction, wherein the row direction and the column direction intersect, and the pixel island combination includes at least one pixel island, and the pixel island is used to carry pixels, wherein the pixel island combinations of adjacent rows are staggered and / or the pixel island combinations of adjacent columns are staggered; A plurality of connecting wires are arranged on the flexible substrate, and the connecting wires are used to connect adjacent pixel island combinations in the same row, and / or to connect adjacent pixel island combinations in the same column, and / or to connect adjacent pixel island combinations in adjacent rows, and / or to connect adjacent pixel island combinations in adjacent columns.

2. The film structure according to claim 1, characterized in that: Also includes: A wiring layer, wherein the connecting wire is arranged on the wiring layer, the wiring layer is located on the flexible substrate, and is located between adjacent pixel island combinations in the same column, and / or between adjacent pixel island combinations in adjacent rows, and / or between adjacent pixel island combinations in adjacent columns, wherein the wiring layer is an insulating material; Preferably, the routing layer is a stretchable insulating material; Preferably, the pixel island comprises an encapsulation layer, a light-emitting unit and a thin film transistor which are stacked in sequence, and the wiring layer is located on a flexible substrate outside the encapsulation layer.

3. The film structure according to claim 2, characterized in that: In the case where there is a crossing area between the connecting wires connecting the pixel island groups in the row direction and the connecting wires connecting the pixel island groups in the column direction, the film layer structure further includes: A redundant pixel island combination, located in the intersection area, the redundant pixel island combination includes at least one redundant pixel island; The redundant pixel island combination does not carry the pixel.

4. The film structure according to any one of claims 1 to 3, characterized in that: There is a first gap between an extension line in the column direction of a point on the edge of the pixel island combination located in the Nth row on a side close to the pixel island combination of an adjacent column and an extension line in the column direction of a point on the edge of the pixel island combination on a side far from the adjacent column, and there is a second gap between the pixel island combinations located in the N-1th row and adjacent columns, and the first gap at least partially overlaps with the second gap, wherein N≥2, M≥1; Preferably, the length of the first gap is smaller than the length of the second gap; Preferably, the length of the first gap is greater than the length of the second gap; Preferably, adjacent pixel island combinations in adjacent rows are arranged diagonally; and / or adjacent pixel island combinations in adjacent columns are arranged diagonally.

5. The film structure according to claim 4, characterized in that: The connecting wires connecting two pixel island combinations arranged diagonally are at an angle to the row direction, or the connecting wires connecting adjacent pixel island combinations in the same row are parallel to the row direction; The connecting wires connecting adjacent pixel island combinations in the same column are parallel to the column direction; Preferably, the angle between the connecting wire connecting the two pixel island combinations arranged diagonally and the row direction is 45°.

6. The film structure according to any one of claims 1 to 3, characterized in that: The pixel island combination includes an even number of the pixel islands, and the even number of the pixel islands are arranged in a matrix.

7. The film structure according to any one of claims 1 to 3, characterized in that: The pixel island combination has chamfers or rounded corners; Preferably, the pixel island combination is octagonal or elliptical.

8. The film structure according to any one of claims 1 to 3, characterized in that: The connecting wire is made of a stretchable conductive material and / or a non-stretchable conductive material; Preferably, the connecting wire is the non-stretchable conductive material, and the shape of the connecting wire includes an arc.

9. An array substrate, characterized in that: The invention comprises the film layer structure described in any one of claims 1 to 8.

10. A flexible display device, characterized in that: Comprising the array substrate as claimed in claim 9.

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