Display substrate, manufacturing method thereof, and display device

Abstract

Disclosed are a display substrate, a manufacturing method thereof, and a display device, which relate to the field of display technologies and are used to achieve a stretchable function. The display substrate has a display area and a non-display area adjacent to the display area; the display substrate includes: a flexible substrate, the flexible substrate includes at least one stretchable area, the stretchable area extends from the display area to the non-display area, and a plurality of openings arranged in an array are provided in the stretchable area; at least one signal line disposed on a first side of the flexible substrate and located in the non-display area, and a positive projection of the signal line on the flexible substrate does not overlap at least some of the plurality of openings. The display substrate provided by the present disclosure is applied to a display device.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and in particular, to a display substrate, a manufacturing method thereof, and a display device. Background Art

[0002] A display device, such as an AMOLED (Active-matrix organic light-emitting diode) display device, has advantages such as being able to individually control each sub-pixel for display, having high contrast, and bright colors. However, the border area of the existing AMOLED display device does not have stretchable performance, which makes it difficult to be applied in curved display products. Summary of the Invention

[0003] The purpose of the present disclosure is to provide a display substrate, a manufacturing method thereof, and a display device for realizing a stretchable function.

[0004] To achieve the above purpose, the present disclosure provides the following technical solutions:

[0005] On the one hand, a display substrate is provided. The display substrate has a display area and a non-display area adjacent to the display area. The display substrate includes a flexible substrate and at least one signal line. The flexible substrate includes at least one stretchable area that extends from the display area to the non-display area, and a plurality of openings arranged in an array are provided in the stretchable area. The at least one signal line is disposed on a first side of the flexible substrate and is located in the non-display area, and the orthographic projection of the signal line on the flexible substrate does not overlap at least partially with each of the plurality of openings.

[0006] In some embodiments, the orthographic projection of the signal line on the flexible substrate does not overlap with each of the plurality of openings.

[0007] In some embodiments, the signal line has at least one first avoidance opening, and the edge of the first avoidance opening is arranged around the opening in the orthographic projection on the flexible substrate. The display substrate further includes: at least one isolation column disposed on the first side of the flexible substrate, the isolation column is arranged around the opening, and the isolation column covers at least the side wall of the first avoidance opening that exposes the opening.

[0008] In some embodiments, the isolation column further covers a part of the surface of the signal line away from the flexible substrate that is close to the first avoidance opening.

[0009] In some embodiments, the signal line includes a first metal layer and a second metal layer sequentially away from the flexible substrate; the isolation column includes a first organic insulating layer and a second organic insulating layer sequentially away from the flexible substrate; the first organic insulating layer covers the side surface of the first metal layer close to the opening and a partial surface of the first metal layer away from the flexible substrate; the second metal layer is in electrical contact with the first metal layer, and the second metal layer covers the side surface of the first organic insulating layer away from the opening and a partial surface of the first organic insulating layer away from the flexible substrate; the second organic insulating layer covers the side surface of the second metal layer close to the opening and a partial surface of the second metal layer away from the flexible substrate.

[0010] In some embodiments, the isolation column further includes: a first inorganic insulating layer located between the first organic insulating layer, the first metal layer, the second metal layer, and the flexible substrate; a second inorganic insulating layer, the second inorganic insulating layer covers at least a partial surface of the second organic insulating layer away from the flexible substrate, the side surface of the second organic insulating layer close to the opening, and the side surface of the first organic insulating layer close to the opening, and the second inorganic insulating layer is connected to the first inorganic insulating layer.

[0011] In some embodiments, the display substrate further includes a light-emitting functional layer and a cathode layer sequentially disposed on a first side of the flexible substrate. The cathode layer extends from the display area to the non-display area, and an edge of the cathode layer is located in the non-display area. The light-emitting functional layer extends from the display area to the non-display area, and a positive projection of the light-emitting functional layer on the flexible substrate is located within a range of a positive projection of the cathode layer on the flexible substrate. Wherein, a partition groove is provided on the isolation column covered by the cathode layer, the partition groove is arranged around the opening, and the partition groove is configured to partition the cathode layer or partition both the cathode layer and the light-emitting functional layer simultaneously.

[0012] In some embodiments, when the isolation column includes the second organic insulating layer and the second inorganic insulating layer, the partition groove penetrates through the second inorganic insulating layer and at least a part of the second organic insulating layer.

[0013] In some embodiments, a cross-section obtained by truncating the partition groove along a radial direction of the opening is substantially an inverted T shape.

[0014] In some embodiments, the signal line includes a voltage signal line, and the voltage signal line is disposed around the display area. The display substrate further includes: a cathode connection layer located in the non-display area, including a first part and a second part connected to each other, the first part being electrically connected to the surface of the cathode layer close to the flexible substrate, and the second part being electrically connected to the surface of the voltage signal line away from the flexible substrate. At least one second avoidance opening is formed in the cathode connection layer, and a projection of an edge of the second avoidance opening on the flexible substrate surrounds the opening.

[0015] In some embodiments, at least part of the isolation posts cover the sidewall of the second avoidance opening; or, at least part of the isolation posts cover the sidewall of the second avoidance opening and a part of the surface of the cathode connection layer away from the flexible substrate close to the second avoidance opening.

[0016] In some embodiments, the display substrate further includes: a first barrier rib disposed on a first side of the flexible substrate, the first barrier rib being located in the non-display area and disposed around the display area, the first barrier rib covering at least the side surface of the voltage signal line away from the display area and the side surface of the cathode connection layer away from the display area, at least one third avoidance opening being formed in the first barrier rib, and a projection of an edge of the third avoidance opening on the flexible substrate surrounding the opening; a second barrier rib disposed on the first side of the flexible substrate, the second barrier rib being located in the non-display area and disposed around the display area, the second barrier rib being disposed on the surface of the second part of the cathode connection layer away from the flexible substrate, at least one fourth avoidance opening being formed in the second barrier rib, and a projection of an edge of the fourth avoidance opening on the flexible substrate surrounding the opening; an encapsulation layer disposed on the first side of the flexible substrate, the encapsulation layer covering the cathode layer, the first barrier rib, and the second barrier rib, at least one fifth avoidance opening being formed in the encapsulation layer, and a projection of an edge of the fifth avoidance opening on the flexible substrate surrounding the opening.

[0017] In some embodiments, the display substrate further includes: a buffer layer disposed on a first side surface of the flexible substrate 1, the buffer layer extending from the display area to the non-display area, and an edge of the buffer layer being located on a side of the first barrier rib away from the display area; at least one groove located in a part of the buffer layer extending to the side of the first barrier rib away from the display area, the at least one groove surrounding the first barrier rib.

[0018] In some embodiments, the display substrate further includes: a third barrier rib covering the at least one groove of the buffer layer.

[0019] In some embodiments, the multiple openings arranged in an array include: a first opening extending in a first direction; and a second opening extending in a second direction intersecting the first direction; wherein, in the first direction and the second direction, the first openings and the second openings are alternately arranged.

[0020] On the other hand, a display device is provided. The display device includes: a display substrate as described in any of the above embodiments.

[0021] In still another aspect, a method for manufacturing a display substrate is provided. The display substrate has a display area and a non-display area adjacent to the display area. The manufacturing method includes: forming a plurality of openings arranged in an array in a stretchable area of the flexible substrate, the stretchable area extending from the display area to the non-display area; forming at least one signal line on a first side of the flexible substrate, the signal line being located in the non-display area, and a positive projection of the signal line on the flexible substrate not overlapping at least partially with each of the plurality of openings.

[0022] In some embodiments, the signal line has at least one first avoidance opening, and an edge of the first avoidance opening is arranged around the opening in a positive projection on the flexible substrate; the manufacturing method further includes: forming at least one isolation column on the first side of the flexible substrate, the isolation column being arranged around the opening, and the isolation column covering at least a side wall of the first avoidance opening exposing the opening.

[0023] In some embodiments, the isolation column includes a second organic insulating layer and a second inorganic insulating layer sequentially away from the flexible substrate; the manufacturing method further includes: etching the second inorganic insulating layer and at least a part of the second organic insulating layer through an etching process to form a partition groove on a surface of at least a part of the isolation column away from the flexible substrate, the partition groove being arranged around the opening, and the partition groove being used for partitioning a light-emitting functional layer and / or a cathode layer.

[0024] The display substrate, the manufacturing method thereof, and the display device provided by the present disclosure have the following beneficial effects:

[0025] In the display substrate provided by the present disclosure, the stretchable area of the flexible substrate extends from the display area to the non-display area, and a plurality of openings arranged in an array are provided in the stretchable area of the flexible substrate. Therefore, the flexible substrate can be stretched in at least a part of the display area and at least a part of the non-display area. Such a design enables the display device to achieve a curved surface display effect by stretching the display substrate when the display substrate is applied to the display device.

[0026] Meanwhile, since the positive projection of the signal line located in the non-display area on the flexible substrate does not overlap with each opening at least partially, the arrangement of the signal line is not likely to affect the arrangement position of the opening in the non-display area, so that the stretchable regions of the flexible substrate in the display area and the non-display area can have substantially the same stretchable performance.

[0027] The beneficial effects that can be achieved by the manufacturing method of the display substrate and the display device provided by the present disclosure are the same as those of the display substrate provided by the above technical solution, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present disclosure, the drawings required for use in some embodiments of the present disclosure will be briefly introduced below. Obviously, the drawings in the following description are only the drawings of some embodiments of the present disclosure, and those of ordinary skill in the art can also obtain other drawings based on these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limitations on the actual dimensions of the products, the actual processes of the methods, the actual timings of the signals, etc. involved in the embodiments of the present disclosure.

[0029] Figure 1 Structural diagram of a display substrate according to some embodiments;

[0030] Figure 2 For Figure 1 Partial structural diagram of the display substrate in the stretchable region A in

[0031] Figure 3A For Figure 2 A cross-sectional structural diagram of a position along B-B' in the stretchable region A in

[0032] Figure 3B For Figure 2 Another cross-sectional structural diagram of a position along B-B' in the stretchable region A in

[0033] Figure 3C Cross-sectional structural diagram of a display substrate with an opening to be processed according to some embodiments;

[0034] Figure 4A Cross-sectional structural diagram of a display substrate in which the cathode layer and the light-emitting functional layer are simultaneously blocked according to some embodiments;

[0035] Figure 4B Cross-sectional structural diagram of a display substrate in which the cathode layer is blocked according to some embodiments;

[0036] Figure 4C Cross-sectional structural diagram of a display substrate having a blocking groove according to some embodiments;

[0037] Figure 5 A cross-sectional structure diagram of a display substrate intercepted along a direction perpendicular to the boundary of the display area according to some embodiments;

[0038] Figure 6 A cross-sectional structure diagram of a display substrate intercepted along a direction parallel to the boundary of the display area according to some embodiments;

[0039] Figure 7 A structure diagram of a display device according to some embodiments;

[0040] Figure 8 A flowchart of a method for manufacturing a display substrate according to some embodiments;

[0041] Figure 9 A flowchart of another method for manufacturing a display substrate according to some embodiments;

[0042] Figure 10 A flowchart of yet another method for manufacturing a display substrate according to some embodiments. Detailed implementation manners

[0043] Next, in conjunction with the accompanying drawings, the technical solutions in some embodiments of the present disclosure will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present disclosure.

[0044] Unless otherwise required by the context, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular form "comprises" and the present participle form "comprising", are interpreted as open and inclusive meanings, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example", or "some examples", etc. are intended to indicate that the specific features, structures, materials, or characteristics related to the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. In addition, the described specific features, structures, materials, or characteristics can be included in any one or more embodiments or examples in any appropriate manner.

[0045] Hereinafter, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present disclosure, unless otherwise specified, the meaning of "a plurality" is two or more.

[0046] "At least one of A, B, and C" has the same meaning as "at least one of A, B, or C", and both include the following combinations of A, B, and C: only A, only B, only C, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

[0047] "A and / or B" includes the following three combinations: only A, only B, and the combination of A and B.

[0048] The use of "is adapted to" or "is configured to" herein means open and inclusive language, which does not exclude a device that is adapted to or configured to perform additional tasks or steps.

[0049] In addition, the use of "based on" means open and inclusive, because a process, step, calculation, or other action "based on" one or more of the said conditions or values may, in practice, be based on additional conditions or values beyond the said ones.

[0050] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and regions is exaggerated for clarity. Accordingly, variations in the shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations resulting from, for example, manufacturing. For example, an etched region shown as rectangular will typically have curved features. Thus, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shape of the regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0051] See Figure 1 , some embodiments of the present disclosure provide a display substrate 100, and the display substrate 100 has a display area Q 1 and a non-display area Q 1 adjacent to the display area Q 2 , wherein the non-display area Q 2 may be only on one or more sides of the display area Q 1 , or may also be, as shown in the example of Figure 1 , the non-display area Q 2 surrounding the display area Q 1 in a circle.

[0052] The display substrate 100 includes a flexible substrate 1 and at least one signal line 2 (such as a voltage signal line 20, a clock signal line, etc.) disposed on the first side of the flexible substrate 1.

[0053] As Figure 1 and Figure 2 shown, the flexible substrate 1 includes at least one stretchable area A, and the stretchable area A extends from the display area Q 1 to the non-display area Q 2 , and a plurality of through holes 3 arranged in an array are provided in the flexible substrate 1 within the stretchable area A. Among them, the stretchable area A, for example, can be Figure 1 any one of the four corner positions in the example, or for another example, the entire flexible substrate 1 can be the stretchable area A, that is, the stretchable area A can simultaneously cover the entire display area Q 1 and the entire non-display area Q 2 . In this way, the flexible substrate 1 can have substantially consistent stretchable performance in the display area Q 1 and the non-display area Q 2 .

[0054] During the manufacturing process of the display substrate 100, the above-mentioned plurality of through holes 3 can be directly formed on the display substrate mother board, and then, after cutting, a single display substrate 100 can be obtained. On this basis, referring to Figure 2 , the corners of the display substrate 100 (i.e., the Figure 2 position of the triangular dotted line frame) can also be cut to form rounded corners, which is convenient for applying it to a display device with rounded corners. Among them, by way of example, as Figure 2 shown, through holes 3 can also be formed on the cut-off corners.

[0055] There are various specific arrangement manners of the "plurality of through holes 3 arranged in an array". For example, as Figure 2 shown, the plurality of through holes 3 arranged in an array may include: a first through hole 31 extending along a first direction X; and a second through hole 32 extending along a second direction Y intersecting with the first direction X. Among them, in the first direction X and the second direction Y, the first through hole 31 and the second through hole 32 are alternately arranged. Such an arrangement is beneficial to enabling the flexible substrate 1 to have better stretchable performance.

[0056] Among them, the second direction Y intersecting with the first direction X includes but is not limited to Figure 2 the manner in which the first and second directions Y and the first direction X are perpendicular to each other shown in

[0057] In some examples, as Figure 3AAs shown, the opening 3 is a through hole penetrating the flexible substrate 1. In some other examples, as Figure 3B shown, the opening 3 is a blind hole. It can be understood that when the opening 3 is a blind hole, the opening 3 has an opening only on the first side of the flexible substrate 1. Moreover, the present disclosure does not limit the depth of the blind hole, that is, the depth of the blind hole can be determined according to the stretchable performance required. For example, the deeper the blind hole, the greater the stretchable range; conversely, the smaller the stretchable range.

[0058] Continuing to refer to Figure 1 and Figure 2 , the signal line 2 is located in the non-display area Q 2 inside, and the orthographic projection of the signal line 2 on the flexible substrate 1 does not overlap at least partially with each of the plurality of openings 3 (such as the first opening 31 or the second opening 32). For example, when arranging the signal line 2, the example shown in Figure 2 can be referred to, and the plurality of openings 3 are exposed by providing openings on the signal line 2.

[0059] Among them, "not overlapping at least partially" may mean that the orthographic projection of the signal line 2 on the flexible substrate 1 does not overlap partially with each opening 3, or may mean that the orthographic projection of the signal line 2 on the flexible substrate 1 does not overlap completely with each opening 3.

[0060] It is worth noting that since in the above display substrate 100, the stretchable area A of the flexible substrate 1 extends from the display area Q 1 to the non-display area Q 2 , and the flexible substrate 1 is provided with a plurality of openings 3 arranged in an array in the stretchable area A, therefore, the flexible substrate 1 can be stretched in at least part of the display area Q 1 and at least part of the non-display area Q 2 inside. Such a design makes it easy to achieve a curved display effect of the display device by stretching the display substrate 100 when the display substrate 100 is applied to the display device.

[0061] At the same time, since the orthographic projection of the signal line 2 located in the non-display area Q 2 on the flexible substrate 1 does not overlap at least partially with each opening 3, the arrangement of the signal line 2 is not likely to affect the arrangement position of the opening 3 in the non-display area Q 2 , so that the stretchable area A of the flexible substrate 1 can have substantially the same stretchable performance in the display area Q 1 and the non-display area Q 2 .

[0062] In some embodiments, as Figure 2As shown, there is at least one first avoidance opening 21 on the signal line 2, and the orthographic projection of the edge of the first avoidance opening 21 on the flexible substrate 1 surrounds the opening 3. For example, in Figure 2 In the example of, the orthographic projection of the edge of the first avoidance opening 21 on the flexible substrate 1 can surround the opening 3 for one circle, or can also surround the opening 3 for half a circle, one-third of a circle, etc.

[0063] It should be noted that Figure 2 In the example, only the example where the orthographic projection of the edge of one first avoidance opening 21 on the flexible substrate 1 surrounds one opening 3 is shown. In other examples, it is also possible to set the orthographic projection of the edge of the first avoidance opening 21 on the flexible substrate 1 to surround two or more openings 3, and the present disclosure does not limit this.

[0064] Among them, the side wall of the first avoidance opening 21 can be Figure 2 The closed ring shown in, or the side wall of the first avoidance opening 21 can also be Figure 2 The partial ring with an opening shown in.

[0065] On this basis, referring to Figure 2 、 Figure 3A And Figure 3B , the display substrate 100 further includes at least one isolation column 4 disposed on the first side of the flexible substrate 1. The isolation column 4 surrounds the opening (for example, it can surround the opening 3 for one circle, or can also surround the opening 3 for half a circle, one-third of a circle, etc.), and the isolation column 4 at least covers the side wall of the first avoidance opening 21 that exposes the opening 3.

[0066] With such a setting, the isolation column 4 can be used to protect the side wall of the signal line 2 close to the opening 3 (that is, the side wall of the first avoidance opening 21). For example, the material of the signal line 2 usually can include metal ions such as Al (aluminum). By setting the isolation column 4, on the one hand, it can block water vapor from infiltrating into the signal line 2 from the opening 3, thereby preventing problems such as Al corrosion of the signal line 2. On the other hand, during the subsequent etching process, it can also prevent the Al ions in the signal line 2 from reacting with Ag (silver) ions in the etching solution. Therefore, by setting the isolation column 4, the signal line 2 can be effectively protected.

[0067] On this basis, exemplarily, referring to Figure 3A And Figure 3B , the isolation column 4 can also cover a part of the surface of the signal line 2 away from the flexible substrate 1 that is close to the first avoidance opening 21. With such a setting, the isolation column 4 can be used to better protect the signal line 2.

[0068] In some embodiments, such as Figure 3A And Figure 3BAs shown, the signal line 2 includes a first metal layer 22 and a second metal layer 23 that are successively farther away from the flexible substrate 1. Such an arrangement is conducive to reducing the resistance on the signal line 2 and improving the signal transmission efficiency.

[0069] On this basis, by way of example, as Figure 3A and Figure 3B shown, the isolation pillar 4 includes a first organic insulating layer 41 and a second organic insulating layer 42 that are successively farther away from the flexible substrate 1.

[0070] Among them, the first organic insulating layer 41 covers the side surface of the first metal layer 22 close to the opening 3 and a partial surface of the first metal layer 22 away from the flexible substrate 1;

[0071] The second metal layer 23 is in electrical contact with the first metal layer 22, and the second metal layer covers the side surface of the first organic insulating layer 41 away from the opening 3 and a partial surface of the first organic insulating layer 41 away from the flexible substrate 1;

[0072] The second organic insulating layer 42 covers the side surface of the second metal 23 layer close to the opening 3 and a partial surface of the second metal layer 23 away from the flexible substrate 1.

[0073] With such a design, the first organic insulating layer 41 and the second organic insulating layer 42 can be used to effectively protect the first metal layer 22 and the second metal layer 23 of the signal line 2.

[0074] On this basis, by way of example, as Figure 3A and Figure 3B shown, the isolation pillar 4 may further include a first inorganic insulating layer 43 and a second inorganic insulating layer 44.

[0075] Among them, the first inorganic insulating layer 43 is located between the first organic insulating layer 41, the first metal layer 22, the second metal layer 23, and the flexible substrate 1.

[0076] The second inorganic insulating layer 44 covers at least a partial surface of the second organic insulating layer 42 away from the flexible substrate 1, the side surface of the second organic insulating layer 42 close to the opening 3, and the side surface of the first organic insulating layer 41 close to the opening 3, and the second inorganic insulating layer 44 is connected to the first inorganic insulating layer 43.

[0077] With such an arrangement, the isolation pillar 4 has better barrier ability, so that the isolation pillar 4 can be used to more effectively protect the signal line 2.

[0078] During the process of manufacturing the display substrate 100, by way of example, after forming the Figure 3C shown structure (i.e., after manufacturing the second inorganic insulating layer 44), the opening 3 can be etched by an etching process (such as Figure 3A the through hole shown or Figure 3BThe blind vias shown).

[0079] In some embodiments of the present disclosure, as Figure 4A shown, the display substrate 100 further includes a light-emitting functional layer 51 (e.g., an electron transport layer, an electron injection layer, an organic light-emitting layer, a hole injection layer, and a hole transport layer, etc.) and a cathode layer 52 that are sequentially disposed on the first side of the flexible substrate 1. Among them, the cathode layer 52 extends from the display area to the non-display area, and the edge of the cathode layer 52 is located in the non-display area; the light-emitting functional layer 51 extends from the display area to the non-display area, and the orthographic projection of the light-emitting functional layer 51 on the flexible substrate 1 is within the orthographic projection range of the cathode layer 52 on the flexible substrate 1.

[0080] Among them, as Figure 4A and Figure 4B shown, a partition groove 45 is provided on the isolation column 4 covered by the cathode layer 52 (including the isolation column 4 completely covered by the cathode layer 52 and the isolation column 4 partially covered by the cathode layer 52), and the partition groove 45 is arranged around the opening 3 (e.g., for the isolation column completely covered by the cathode layer 52, the partition groove 45 thereon can be arranged in a circle around the opening 3; for the isolation column 4 partially covered by the cathode layer 52, the partition groove thereon can be arranged only half a circle or one-third of a circle around the opening 3, etc.).

[0081] The partition groove 45 is configured to simultaneously partition the light-emitting functional layer 51 and the cathode layer 52 (as Figure 4A shown), or the partition groove 45 is configured to only partition the cathode layer 52 (as Figure 4B shown).

[0082] With such a setting, after encapsulating the display substrate, water vapor can be prevented from seeping from the side of the partition groove 45 close to the opening 3 to the side of the partition groove 45 far from the opening 3, thereby improving the influence of water vapor on the light-emitting functional layer 51 and the cathode layer 52.

[0083] In some examples, referring to Figure 4A and Figure 4B , the display substrate further includes an anode layer, and the anode layer includes a plurality of anodes 53 corresponding to a plurality of sub-pixels. Exemplarily, the anode 53 fabricated above the partition groove 45 can adhere to the inner wall of the partition groove 45.

[0084] Exemplarily, referring to Figures 4A - 4C , the cross-section obtained by truncating the partition groove 45 along the radial direction Z of the opening 3 is generally in an inverted T shape. Such a design helps to partition the light-emitting functional layer 51 and the cathode layer 52 when fabricating the light-emitting functional layer 51 and the cathode layer 52, and enables the middle part after partitioning to be deposited at the bottom of the partition groove 45, thereby facilitating good encapsulation of the subsequent encapsulation layer.

[0085] Among them, being generally in an inverted T shape may refer to being in the described shape (i.e., the inverted T shape), or may also refer to being in a shape similar to the described shape, such as an inverted T shape with a curved edge or a serrated edge, etc.

[0086] Exemplarily, as Figures 4A - 4C shown, when the isolation column 4 includes the second organic insulating layer 42 and the second inorganic insulating layer 44, the above partition groove 4 may penetrate through the second inorganic insulating layer 44 and at least part of the second organic insulating layer 42. It should be noted that in some examples, by directly etching the stacked second organic insulating layer 42 and second inorganic insulating layer 44, the above partition groove with a cross-section generally in an inverted T shape can be obtained. At this time, it also has the advantages of simple process and convenient production.

[0087] In some embodiments, referring to Figure 1 , the above signal line 2 may be a voltage signal line 20 located in the non-display area Q 2 , and the voltage signal line 20 may be arranged around the display area Q 1 .

[0088] Referring to Figure 4A , Figure 4B and Figure 5 , the display substrate 100 further includes a cathode connection layer 54 located in the non-display area Q 2 . The cathode connection layer 54 includes a first part and a second part connected to each other. The first part is electrically connected to the surface of the cathode layer 52 close to the flexible substrate 1, and the second part is electrically connected to the surface of the voltage signal line 20 far from the flexible substrate 1.

[0089] There is at least one second avoidance opening 541 on the cathode connection layer 54, and the projection of the edge of the second avoidance opening 541 on the flexible substrate 1 surrounds the opening 3 (for example, the projection of the edge of the second avoidance opening 541 on the flexible substrate 1 may surround the opening 3 in a circle, or may also surround the opening 3 in a semi-circle, one-third circle, etc.).

[0090] With such a design, the cathode connection layer 54 located in the non-display area Q 2 can avoid the opening 3, that is, the setting of the cathode connection layer 54 does not affect the arrangement position of the opening 3 in the non-display area Q 2 . Thus, the stretchable area A of the flexible substrate 1 can have substantially the same stretching performance in the display area Q 1 and the non-display area Q 2 .

[0091] Exemplarily, referring to Figure 4A and Figure 4B, at least a part of the isolation posts 4 covers the side wall of the second avoidance opening 541. With such an arrangement, the side wall of the cathode overlapping layer 54 close to the opening 3 (i.e., the side wall of the second avoidance opening 541) can be protected by the isolation posts 4, thereby preventing the cathode overlapping layer 54 from being eroded by water and oxygen, and preventing the metal ions in the cathode overlapping layer 54 from undergoing a displacement reaction with the metal ions in the etching solution, etc.

[0092] Exemplarily, at least a part of the isolation posts 4 covers the side wall of the second avoidance opening 541 and a part of the surface of the cathode overlapping layer 54 away from the flexible substrate 1 that is close to the second avoidance opening 541. With such an arrangement, the isolation posts 4 can better protect the cathode overlapping layer 54 to prevent the cathode overlapping layer 54 from being eroded by water and oxygen, and prevent the metal ions in the cathode overlapping layer 54 from undergoing a displacement reaction with the metal ions in the etching solution, etc.

[0093] Among them, the cathode overlapping layer 54 can be made of the same layer and the same material as the above-mentioned anode 53. This is beneficial to simplifying the manufacturing process of the display substrate 100.

[0094] Based on some of the above embodiments, exemplarily, see Figure 5 and Figure 6 , the display substrate 100 further includes: a first barrier dam 61, a second barrier dam 62, and a packaging layer 55.

[0095] As Figure 5 shown, the first barrier dam 61 is disposed on the first side of the flexible substrate 1, the first barrier dam 61 is located in the non-display area Q 2 and is disposed around the display area Q 1 , the first barrier dam 61 at least covers the side surface of the voltage signal line 20 away from the display area Q 1 and the side surface of the cathode overlapping layer 54 away from the display area Q 1 . The first barrier dam 61 has at least one third avoidance opening 610, and the projection of the edge of the third avoidance opening 610 on the flexible substrate 1 is disposed around the opening 3 (for example, the projection of the edge of the third avoidance opening 610 on the flexible substrate 1 can surround the opening 3 in a circle, or can also surround the opening 3 in a semi-circle, one-third circle, etc.). Among them, the third avoidance opening 610 is configured not to penetrate the side surface of the first barrier dam 61 close to the display area Q 1 and the side surface of the first barrier dam 61 away from the display area Q 1 . In this way, during the manufacturing process of the display substrate 100, the first barrier dam 61 can prevent the materials on its side close to the display area from flowing to its side away from the display area, so that the display substrate 100 can achieve good packaging.

[0096] Exemplarily, as Figure 5As shown, the first barrier dam 61 also covers a partial surface of the voltage signal line 20 away from the flexible substrate 1 (i.e., the partial surface of the entire surface of the voltage signal line 20 away from the flexible substrate 1 that is close to the first barrier dam 61) and a partial surface of the cathode connection layer 54 away from the flexible substrate 1 (i.e., the partial surface of the entire surface of the cathode connection layer 54 away from the flexible substrate 1 that is close to the first barrier dam 61).

[0097] Continue to refer to Figure 5 , in some examples, the first barrier dam 61 can be a three-layer structure. For example, along the direction away from the flexible substrate 1, the first layer can be made of the same layer and the same material as the flat layer 56, the second layer can be made of the same layer and the same material as the pixel definition layer 57, and the third layer can be made of the same layer and the same material as the filling layer 58.

[0098] Among them, the flat layer 56 can include the above-mentioned first organic insulating layer and / or second organic insulating layer.

[0099] The pixel definition layer 57 extends from the display area Q 1 to the non-display area Q 2 , and the edge of the pixel definition layer 57 is located in the non-display area Q 2 . The pixel definition layer 57 has openings for defining a plurality of sub-pixel regions.

[0100] In some examples, as Figure 5 shown, the cathode connection layer 54 has a plurality of holes 542 distributed in an array, and at least one of the plurality of holes 542 penetrates the cathode connection layer 54. At least some of the plurality of holes 542 are within the range of the orthographic projection of the flat layer 56 on the flexible substrate 1 on the flexible substrate 1. This can release the gas generated in the film layer (such as the flat layer 56) below the cathode connection layer 54 during the manufacturing process of the display substrate 100, improving the reliability of the display substrate.

[0101] The above-mentioned filling layer 58 can be used to fill the holes 542 on the cathode connection layer 54. In this way, the upper surface of the cathode connection layer 54 can be made flat, facilitating the fabrication of other film layers on the cathode connection layer 54.

[0102] Here, it should be noted that when the cathode layer 52 is overlapped with the cathode connection layer 54, the actually electrically connected area is grid-shaped, and the filling layer material in the middle is non-conductive.

[0103] As Figure 5 shown, the second barrier dam 62 is disposed on the first side of the flexible substrate 1, and the second barrier dam 62 is located in the non-display area Q 2 and surrounds the display area Q 1The second barrier dam 62 is disposed on the surface of the second part of the cathode overlapping layer 54 away from the flexible substrate 1. There is at least one fourth avoidance opening 620 on the second barrier dam 62. The projection of the edge of the fourth avoidance opening 620 on the flexible substrate 1 surrounds the opening 3 (for example, the projection of the edge of the fourth avoidance opening 620 on the flexible substrate 1 can surround the opening 3 in a circle, or can also surround the opening 3 in a semi - circle, one - third circle, etc.).

[0104] Exemplarily, as Figure 5 shown, the fourth avoidance opening 620 can successively expose the second avoidance opening 541, the first avoidance opening 21, and the opening 3.

[0105] In some examples, the second barrier dam 62 can be a two - layer structure. For example, along the direction away from the flexible substrate 1, the first layer can be made of the same layer and the same material as the pixel definition layer 57, and the second layer can be made of the same layer and the same material as the filling layer 58.

[0106] Referring to Figure 5 and Figure 6 , the encapsulation layer 55 is disposed on the first side of the flexible substrate 1. The encapsulation layer 55 covers the cathode layer 52, the first barrier dam 61, and the second barrier dam 62. There is at least one fifth avoidance opening 551 on the encapsulation layer 55. The projection of the edge of the fifth avoidance opening 551 on the flexible substrate 1 surrounds the opening 3 (for example, the projection of the edge of the fifth avoidance opening 551 on the flexible substrate 1 can surround the opening 3 in a circle, or can also surround the opening 3 in a semi - circle, one - third circle, etc.).

[0107] In some embodiments of the present disclosure, referring to Figure 3A and Figure 3B , Figures 4A - 4C , Figure 5 and Figure 6 , the display substrate 100 may further include a buffer layer 11 on the surface of the first side of the flexible substrate 1. The buffer layer 11 extends from the display area Q 1 to the non - display area Q 2 , and the edge of the buffer layer 11 is located on the side of the first barrier dam 61 away from the display area Q 1 . Among them, there is an opening on the buffer layer 11 that exposes the opening 3.

[0108] On this basis, exemplarily, as Figure 5 shown, the part of the buffer layer 11 extending to the side of the first barrier dam 61 away from the display area Q 1 is formed with at least one groove 110, and the groove 110 surrounds the first barrier dam 61. In this way, during the process of manufacturing the display substrate 100, the outer crack can be blocked by the groove 110 from spreading inwards and affecting the display area Q 1, thereby improving the reliability of the display substrate 100.

[0109] Exemplarily, as Figure 5 shown, a third dam 63 may be further provided on a side of the groove 110 away from the substrate. A better effect of blocking crack propagation can be achieved through the third dam 63.

[0110] Some embodiments of the present disclosure provide a display device 200, as Figure 7 shown, the display device 200 includes the display substrate as described in any of the above embodiments.

[0111] Exemplarily, the display device 200 may be, for example, any product or component having a display function such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc.

[0112] For the technical effects of the display device 200, reference may be made to the technical effects of the display substrate described in any of the above embodiments, which will not be elaborated herein.

[0113] Some embodiments of the present disclosure further provide a method for manufacturing a display substrate. Refer to Figure 1 and Figure 2 , the display substrate 100 has a display area Q 1 and a non-display area Q 1 adjacent to the display area Q. 2 . Refer to Figure 8 , the manufacturing method includes:

[0114] S1. Form a plurality of apertures 3 arranged in an array in the stretchable area A of the flexible substrate 1, and the stretchable area A extends from the display area Q 1 to the non-display area Q 2 .

[0115] S2. Form at least one signal line 2 on a first side of the flexible substrate 1, the signal line 2 is located in the non-display area Q 2 , and the orthographic projection of the signal line 2 on the flexible substrate 1 does not overlap at least partially with each of the plurality of apertures 3.

[0116] Exemplarily, as Figure 2 shown, the signal line 2 has at least one first avoidance opening 21, and the edge of the first avoidance opening 21 is arranged around the aperture 3 in the orthographic projection on the flexible substrate 1 (for example, Figure 2 in the example, the edge of the first avoidance opening 21 can be arranged around the aperture 3 in a circle, or can also be arranged around the aperture 3 for half a circle, one-third of a circle, etc.). On this basis, refer to Figure 3A , Figure 3B and Figure 9 , the manufacturing method further includes:

[0117] S3. Form at least one isolation pillar 4 on the first side of the flexible substrate 1. The isolation pillar 4 is arranged around the opening 3, and the isolation pillar 4 at least covers the side wall of the first avoidance opening 21 that exposes the opening.

[0118] Exemplarily, refer to Figure 4A and Figure 4B , the isolation pillar includes a first inorganic insulating layer 42 and a second inorganic insulating layer 44 that are successively away from the flexible substrate. Refer to Figure 10 , this manufacturing method may further include:

[0119] S4. Etch the second inorganic insulating layer 44 and at least part of the second organic insulating layer 42 through an etching process to form a partition groove 45 on the surface of at least part of the isolation pillar 4 away from the flexible substrate 1. The partition groove 45 is arranged around the opening 3, and the partition groove 45 is used to partition the light-emitting functional layer 51 and / or the cathode layer 52. Among them, the material and shape of the isolation pillar 4 and the shape of the partition groove 45 have been described in detail above, and will not be elaborated here.

[0120] The manufacturing method of the display substrate provided by some embodiments of the present disclosure is used to manufacture the display substrate 100 in any of the above embodiments. Therefore, the manufactured display substrate 100 has all the beneficial effects described above, and will not be elaborated here.

[0121] As mentioned above, only the specific embodiments of the present disclosure are described, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure, thinking of changes or substitutions, should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A display substrate, characterized in that, the display substrate has a display area and a non-display area adjacent to the display area; the display substrate includes: a flexible substrate, the flexible substrate includes at least one stretchable area, the stretchable area extends from the display area to the non-display area, and a plurality of openings arranged in an array are provided in the stretchable area; at least one signal line disposed on the first side of the flexible substrate and located in the non-display area, the orthographic projection of the signal line on the flexible substrate does not overlap at least partially with each of the plurality of openings; at least one first avoidance opening is provided on the signal line, and the orthographic projection of the edge of the first avoidance opening on the flexible substrate surrounds the opening; at least one isolation column disposed on the first side of the flexible substrate, the isolation column surrounds the opening, and the isolation column covers at least the side wall of the first avoidance opening exposing the opening.

2. The display substrate according to claim 1, characterized in that, the orthographic projection of the signal line on the flexible substrate does not overlap completely with each of the plurality of openings.

3. The display substrate according to claim 1, characterized in that, the isolation column also covers a part of the surface of the signal line away from the flexible substrate and close to the first avoidance opening.

4. The display substrate according to claim 1, characterized in that, the signal line includes a first metal layer and a second metal layer sequentially away from the flexible substrate; the isolation column includes a first organic insulating layer and a second organic insulating layer sequentially away from the flexible substrate; the first organic insulating layer covers the side surface of the first metal layer close to the opening and a part of the surface of the first metal layer away from the flexible substrate; the second metal layer is in electrical contact with the first metal layer, and the second metal layer covers the side surface of the first organic insulating layer away from the opening and a part of the surface of the first organic insulating layer away from the flexible substrate; the second organic insulating layer covers the side surface of the second metal layer close to the opening and a part of the surface of the second metal layer away from the flexible substrate.

5. The display substrate according to claim 4, characterized in that, the isolation column further includes: a first inorganic insulating layer located between the first organic insulating layer, the first metal layer, the second metal layer and the flexible substrate; a second inorganic insulating layer, the second inorganic insulating layer covers at least a part of the surface of the second organic insulating layer away from the flexible substrate, the side surface of the second organic insulating layer close to the opening and the side surface of the first organic insulating layer close to the opening, and the second inorganic insulating layer is connected to the first inorganic insulating layer.

6. The display substrate according to claim 1, characterized in that, the display substrate further includes a light-emitting functional layer and a cathode layer sequentially disposed on the first side of the flexible substrate; the cathode layer extends from the display area to the non-display area, and the edge of the cathode layer is located in the non-display area; The light-emitting functional layer extends from the display area to the non-display area, and the orthographic projection of the light-emitting functional layer on the flexible substrate is within the orthographic projection range of the cathode layer on the flexible substrate; Wherein, a partition groove is provided on the isolation pillar covered by the cathode layer, the partition groove is arranged around the opening, and the partition groove is configured to partition the cathode layer or partition both the cathode layer and the light-emitting functional layer at the same time.

7. The display substrate according to claim 6, characterized in that when the isolation pillar includes a second organic insulating layer and a second inorganic insulating layer, the partition groove penetrates through the second inorganic insulating layer and at least part of the second organic insulating layer.

8. The display substrate according to claim 6, characterized in that The cross-section obtained by truncating the partition groove along the radial direction of the opening is substantially an inverted T shape.

9. The display substrate according to any one of claims 6 to 8, characterized in that The signal line includes a voltage signal line, and the voltage signal line is arranged around the display area; The display substrate further includes: A cathode connection layer located in the non-display area, including a first part and a second part connected to each other, the first part is electrically connected to the surface of the cathode layer close to the flexible substrate, and the second part is electrically connected to the surface of the voltage signal line away from the flexible substrate; There is at least one second avoidance opening on the cathode connection layer, and the orthographic projection of the edge of the second avoidance opening on the flexible substrate is arranged around the opening.

10. The display substrate according to claim 9, characterized in that At least part of the isolation pillar covers the side wall of the second avoidance opening; or, At least part of the isolation pillar covers the side wall of the second avoidance opening and a part of the surface of the cathode connection layer away from the flexible substrate close to the second avoidance opening.

11. The display substrate according to claim 9, characterized in that The display substrate further includes: A first barrier dam provided on the first side of the flexible substrate, the first barrier dam is located in the non-display area and arranged around the display area, the first barrier dam covers at least the side surface of the voltage signal line away from the display area and the side surface of the cathode connection layer away from the display area, and there is at least one third avoidance opening on the first barrier dam, and the orthographic projection of the edge of the third avoidance opening on the flexible substrate is arranged around the opening; A second barrier dam provided on the first side of the flexible substrate, the second barrier dam is located in the non-display area and arranged around the display area, the second barrier dam is located on the surface of the second part of the cathode connection layer away from the flexible substrate, and there is at least one fourth avoidance opening on the second barrier dam, and the orthographic projection of the edge of the fourth avoidance opening on the flexible substrate is arranged around the opening; An encapsulation layer provided on the first side of the flexible substrate, the encapsulation layer covers the cathode layer, the first barrier dam and the second barrier dam, and there is at least one fifth avoidance opening on the encapsulation layer, and the orthographic projection of the edge of the fifth avoidance opening on the flexible substrate is arranged around the opening.

12. The display substrate according to claim 11, wherein, the display substrate further comprises: a buffer layer located on a first side surface of the flexible substrate, the buffer layer extending from the display area to the non-display area, and an edge of the buffer layer being located on a side of the first dam away from the display area; at least one groove located in a portion of the buffer layer extending to a side of the first dam away from the display area, the at least one groove being disposed around the first dam.

13. The display substrate according to claim 12, wherein, a third dam covering the at least one groove of the buffer layer.

14. The display substrate according to claim 1 or 2, wherein, the plurality of apertures arranged in an array comprise: a first aperture extending in a first direction; and, a second aperture extending in a second direction intersecting the first direction; wherein, in the first direction and the second direction, the first apertures and the second apertures are alternately arranged.

15. A display device, wherein, the display device comprises: a display substrate according to any one of claims 1 to 14.

16. A method for manufacturing a display substrate, wherein, the display substrate has a display area and a non-display area adjacent to the display area; the manufacturing method comprises: forming a plurality of apertures arranged in an array in a stretchable area of the flexible substrate, the stretchable area extending from the display area to the non-display area; forming at least one signal line on a first side of the flexible substrate, the signal line being located in the non-display area, and a positive projection of the signal line on the flexible substrate not overlapping at least partially with each of the plurality of apertures; at least one first avoidance opening is provided on the signal line, and an edge of the first avoidance opening is arranged around the aperture in a positive projection on the flexible substrate; forming at least one isolation column on the first side of the flexible substrate, the isolation column being arranged around the aperture, and the isolation column covering at least a side wall of the first avoidance opening exposing the aperture.

17. The manufacturing method according to claim 16, wherein, the isolation column comprises a second organic insulating layer and a second inorganic insulating layer sequentially away from the flexible substrate; and further comprises: etching the second inorganic insulating layer and at least a part of the second organic insulating layer through an etching process to form a partition groove on a surface of at least a part of the isolation column away from the flexible substrate, the partition groove being arranged around the aperture, and the partition groove being used for partitioning a light-emitting functional layer and / or a cathode layer.

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