Display panel and display device

Abstract

Provided in the embodiments of the present disclosure are a display panel and a display device. The display panel comprises a plurality of display portions and connection structures, the plurality of display portions being separated from each other, and each connection structure being located between adjacent display portions and connecting the adjacent display portions, wherein the connection structure comprises alternately connected bends and extensions, at least three bends being provided, each extension being located between adjacent bends, and the adjacent bends having opposite bending directions; when the connection structure is in an initial state, at least one bend in the connection structure and the extension connected to one end of the bend satisfy the condition that the distance between the centerline of the bend and the extension gradually decreases along a reference direction, the centerline of the bend being a straight line along a radial direction of the bend and passing through the midpoint of the bend portion, and the reference direction being a direction along the centerline of the bend and extending from the midpoint of the bend toward the end of the extension away from the bend.

Description

Display panel and display device

[0001] This application claims priority to Chinese patent application No. 202510388123.5, filed on March 28, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0003] Stretchable displays, as an important cutting-edge direction in next-generation display technology, are attracting increasing attention, especially in fields such as automotive displays, medical devices, and wearable devices. These fields require display panels with excellent stretchability, capable of emitting light normally in complex curved structures without affecting display effects and visual experience. Therefore, developing flexible and stretchable display panels is a key research direction for the expansion and innovation of flexible display technology. Summary of the Invention

[0004] On one hand, a display panel is provided. The display panel includes: a plurality of display sections and a connecting structure, wherein the plurality of display sections are separated from each other; the connecting structure is located between adjacent display sections and connects adjacent display sections; wherein the connecting structure includes: alternately connected bent sections and extension sections, the number of bent sections is at least three, each extension section is located between adjacent bent sections, and the bending directions of adjacent bent sections are opposite; when the connecting structure is in an initial state, at least one bent section and the extension section connected to one end of the bent section in the connecting structure conform to the following: along a reference direction, the distance between the centerline of the bent section and the extension section gradually decreases; the centerline of the bent section is a straight line along the radial direction of the bent section and passing through the midpoint of the bent section, and the reference direction is along the centerline of the bent section and from the midpoint of the bent section towards the end of the extension section away from the bent section.

[0005] In some embodiments, the bending portion includes a first bending portion, and the extensions connected to both ends of the first bending portion are a first extension and a second extension; when the connection structure is in the initial state, along the reference direction, the distance between the centerline of the first bending portion and the first extension gradually decreases, and the distance between the centerline of the first bending portion and the second extension gradually decreases.

[0006] In some embodiments, the bending portion further includes a second bending portion, one end of which is connected to the side of the display portion, and the other end of which is connected to the first bending portion through the extension portion; a connection structure includes two second bending portions, which are respectively located at both ends of the connection structure.

[0007] In some embodiments, the adjacent display portions are a first display portion and a second display portion, the first display portion includes a first side, the second display portion includes a second side, and the first side and the second side are disposed facing each other; the two ends of the connecting structure are respectively connected to the first side and the second side.

[0008] In some embodiments, the connecting structure includes three bends, with the middle bend being the first bend; the connection positions of one end of the connecting structure with the first side and the other end of the connecting structure with the second side are symmetrical about the centerline of the first bend.

[0009] In some embodiments, the number of connection structures between adjacent display units is one; the first side includes a first end and a second end, the second side includes a third end and a fourth end, and the first end and the third end are symmetrical about the centerline of the first bend; one end of the connection structure is connected to the first end, and the other end of the connection structure is connected to the third end; the first bend of the connection structure is disposed close to the second end and the fourth end.

[0010] In some embodiments, the plurality of display units include a plurality of repeating units, each repeating unit including four display units arranged in a 2×2 array, and four connecting structures connecting the four display units; in the four connecting structures, the first bends of adjacent connecting structures along a first direction are arranged close to each other, and the first bends of adjacent connecting structures along a second direction are arranged far apart from each other; one of the first direction and the second direction is the row direction in which the four display units are arranged, and the other is the column direction in which the four display units are arranged.

[0011] In some embodiments, the distance along the reference direction between the midpoint of the first bend and the end of the connecting structure is greater than the side length of the first side.

[0012] In some embodiments, the number of connection structures between adjacent display units is two; one end of the connection structure is connected to the first side and has a gap between it and both ends of the first side; the other end of the connection structure is connected to the second side and has a gap between it and both ends of the second side; the first bends of the two connection structures located between adjacent display units are arranged far apart from each other.

[0013] In some embodiments, the two connection structures located between adjacent display units are symmetrical about the line connecting the centers of the adjacent display units.

[0014] In some embodiments, the distance between the midpoints of the first bends of the two connecting structures between adjacent display portions is greater than the side length of the adjacent first side.

[0015] In some embodiments, both the first extension and the second extension form an angle with the centerline of the first bend, and the first extension and the second extension are symmetrically arranged about the centerline of the first bend.

[0016] In some embodiments, the connecting structure includes four bends, and the two bends located in the middle of the four bends are both the first bends; the connection position between one end of the connecting structure and the first side is the first connection position, and the connection position between the other end of the connecting structure and the second side is the second connection position, and the angle between the line connecting the first connection position and the second connection position and the centerline of any of the first bends is an acute angle.

[0017] In some embodiments, the number of connection structures between adjacent display portions is one; the first side includes a first end and a second end, the second side includes a third end and a fourth end, and the first end and the third end are symmetrical about the centerline of the first bend; one end of the connection structure is connected to the second end, and the other end of the connection structure is connected to the third end; in the connection structure, one first bend is disposed near the first end, and the other first bend is disposed near the fourth end.

[0018] In some embodiments, along the reference direction, the distance between the midpoints of the two first bends in the connecting structure and the end of the connecting structure is greater than the side length of the first side.

[0019] In some embodiments, the connection structure between adjacent display units includes a first connection structure and a second connection structure; the first side includes a first end and a second end, the second side includes a third end and a fourth end, the first end and the third end are symmetrical about the centerline of the first bend; one end of the first connection structure has a gap between itself and both the first end and the second end, and the other end of the first connection structure is connected to the third end; one end of the second connection structure is connected to the second end, and the other end of the second connection structure has a gap between itself and both the third end and the fourth end.

[0020] In some embodiments, in the two first bends of the connecting structure, the distance along the reference direction between the midpoint of one first bend and the end of the connecting structure adjacent to it is greater than half the side length of the first side and less than the side length of the first side; the distance along the reference direction between the midpoint of the other first bend and the end of the connecting structure adjacent to it is less than or equal to half the side length of the first side.

[0021] In some embodiments, the first connection structure and the second connection structure are centrally symmetrical about the midpoint of the line connecting the centers of adjacent display units.

[0022] In some embodiments, the extension connecting the two first bends of the connection structure is parallel to the first side.

[0023] In some embodiments, the adjacent display portions are a first display portion and a second display portion, the first display portion includes a first side, the second display portion includes a second side, and the first side and the second side are disposed facing each other; the first display portion further includes a third side connected to the first side; one end of the connecting structure is connected to the third side, and the other end of the connecting structure is connected to the second side.

[0024] In some embodiments, the connection structure is located close to the first side when it connects to the third side; the second side includes a fifth end close to the third side, and the connection structure is located at the fifth end when it connects to the second side.

[0025] In some embodiments, the bending portion includes a third bending portion, one end of which is connected to the display portion, and an extension connected to the other end of the third bending portion is a third extension portion; when the connection structure is in its initial state, the distance between the centerline of the third bending portion and the third extension portion gradually decreases along the reference direction.

[0026] In some embodiments, the connection structure between adjacent display units includes a first connection structure and a second connection structure; the adjacent display units are respectively a first display unit and a second display unit, the first display unit includes a first side, the second display unit includes a second side, and the first side and the second side are disposed facing each other; the first display unit further includes a third side connected to the first side, and the second display unit further includes a fourth side connected to the second side, the third side and the fourth side are respectively located on both sides of the line connecting the centers of the first display unit and the second display unit; one end of the first connection structure is connected to the third side, and the other end of the first connection structure is connected to the second side; one end of the second connection structure is connected to the first side, and the other end of the second connection structure is connected to the fourth side.

[0027] In some embodiments, the midpoint of the line connecting the centers of the first display unit and the second display unit is a reference midpoint, and the first connecting structure and the second connecting structure are symmetrical about the reference midpoint.

[0028] In some embodiments, a plurality of the connection structures are arranged around the display portion, and the plurality of the connection structures are centrally symmetrical about the center of the display portion.

[0029] On the other hand, a display device is provided. The display device includes: a display panel as described in any of the above embodiments; and a circuit board coupled to the display panel. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0031] Figure 1 is a structural diagram of a display panel according to some embodiments;

[0032] Figure 2 is a structural diagram of the connection structure in the display panel of Figure 1;

[0033] Figure 3 is a structural diagram of a display panel according to some other embodiments;

[0034] Figure 4 is a structural diagram of the connection structure in the display panel of Figure 3;

[0035] Figure 5 is a structural diagram of a display panel according to some other embodiments;

[0036] Figure 6 is a structural diagram of the connection structure in the display panel of Figure 5;

[0037] Figure 7 is a structural diagram of a display panel according to some other embodiments;

[0038] Figure 8 is a partial enlarged view of the display panel in Figure 7;

[0039] Figure 9 is a structural diagram of a display panel according to some other embodiments;

[0040] Figure 10 is a structural diagram of the connection structure in the display panel of Figure 9;

[0041] Figure 11 is a structural diagram of a display panel according to some other embodiments;

[0042] Figure 12 is a structural diagram of the connection structure in the display panel of Figure 11;

[0043] Figure 13 is a structural diagram of a display panel according to some other embodiments;

[0044] Figure 14 is a structural diagram of the connection structure in the display panel of Figure 13;

[0045] Figure 15 is a structural diagram of a display panel according to some other embodiments;

[0046] Figure 16 shows a tensile crack test diagram of one of the display panels in Figure 1;

[0047] Figure 17 shows a tensile crack test diagram of another type of display panel in Figure 1;

[0048] Figure 18 is a simulation diagram of the stretched structure of the display panel in Figure 5;

[0049] Figure 19 shows a tensile crack test diagram of one of the display panels in Figure 5;

[0050] Figure 20 shows a tensile crack test diagram of another display panel in Figure 5;

[0051] Figure 21 is a simulation diagram of the stretched structure of the display panel in Figure 3;

[0052] Figure 22 is a simulation diagram of the stretched structure of the display panel in Figure 9;

[0053] Figure 23 shows the tensile crack test diagram of the display panel in Figure 9;

[0054] Figure 24 is a structural diagram of a display device according to some other embodiments. Detailed Implementation

[0055] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0056] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0057] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0058] In describing some embodiments, the terms "coupled" and "connected," and their derivative expressions, may be used. The term "connected" should be interpreted broadly; for example, a "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection via an intermediate medium. The term "coupled," for example, indicates that two or more components have direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content of this document.

[0059] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0060] The use of “applies to” or “configured to” in this article implies an open and inclusive language that does not preclude applicability to or configuration to devices that perform additional tasks or steps.

[0061] In addition, the use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0062] As used herein, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0063] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°; “equal” includes absolute equality and approximate equality, where an acceptable range of deviation for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0064] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0065] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0066] Embodiments of this disclosure provide a stretchable display panel 1000, as shown in FIG1 or FIG3, including: a plurality of display portions 100 and a connecting structure 200. The plurality of display portions 100 are separated from each other; the connecting structure 200 is located between adjacent display portions 100 and connects adjacent display portions 100.

[0067] In some embodiments, referring to FIG2, the connection structure 200 includes: alternating bent portions 201 and extension portions 202, the number of bent portions 201 is three, each extension portion 202 is located between adjacent bent portions 201, and the bending directions of adjacent bent portions 201 are opposite.

[0068] In some other embodiments, referring to FIG4, the number of bends 201 in the connection structure 200 may also be four.

[0069] Referring again to Figure 2 or Figure 4, when the connecting structure 200 is in its initial state, adjacent extensions 202 meet the following condition: along the reference direction X, the distance J between adjacent extensions 202 is equal. The reference direction X is along the centerline M of the intermediate bend 201, and points from the midpoint of the bend 201 towards the end of the extension 202 connected to the bend 201 away from the bend 201.

[0070] The phrase "connection structure 200 in its initial state" refers to the original geometric state of connection structure 200 when it is not stretched or deformed.

[0071] Referring again to FIG1, the display unit 100 is provided with light-emitting units 10. Each display unit 100 may include one or more light-emitting units 10 (i.e., sub-pixels) for displaying images and thin-film transistors for driving the light-emitting units to emit light. The light-emitting unit 10 may be an electroluminescent organic light-emitting device (such as OLED), and its structure is not specifically limited here.

[0072] The connection structure 200 includes a signal line L that electrically connects to the light-emitting unit 10. The signal line L includes at least a data line, a gate line, a driving voltage line, and a voltage transmission line.

[0073] Each display unit 100 may include film layers such as organic layers, inorganic layers, and metal layers. Among them, the inorganic layers are mainly used to make the encapsulation layer of the light-emitting unit 10, the insulating layer and the active layer in the pixel circuit, etc., while the metal layers can be used to make the electrodes of the light-emitting unit 10 and the signal lines in the pixel circuit, etc.

[0074] When the display panel 1000 is stretched, the connecting structure 200 deforms, increasing the distance between the display units 100. The connecting structure 200 maintains the connection between the display units 100, thus ensuring the integrity of the display panel 1000 while achieving a stretching effect. However, if the strain of the connecting structure 200 is too large during the stretching process—that is, if the ratio of the deformation of the connecting structure 200 to its original length is too large—it can easily cause cracks in the metal and inorganic layers of the connecting structure 200, which are not easily stretched. This can lead to excessive stretching distance causing the signal line L to break, resulting in a lower overall stretching rate of the display panel 1000 or uneven display within the display panel 1000, leading to display abnormalities. This impact is particularly pronounced when the size of the display units 1000 is large.

[0075] The inventors discovered that the factors affecting the stress magnitude of the connecting structure 200 are determined by the corner radius of the bending portion 201 in the connecting structure 200, the width of the connecting structure 200, and the length of the connecting structure 200. With the thickness and structure of the connecting structure 200 unchanged, increasing the radius of the bending portion 201 and the length of the connecting structure 200 can effectively reduce the strain of the connecting structure 200, ensuring that the signal lines on the connecting structure 200 do not break while improving fatigue resistance.

[0076] Therefore, embodiments of this disclosure provide a display panel 1000, referring to FIG5, including: a plurality of display portions 100 and a connecting structure 200. The plurality of display portions 100 are separated from each other; the connecting structure 200 is located between adjacent display portions 100 and connects adjacent display portions 100. Referring to FIG6, the connecting structure 200 includes: alternately connected bent portions 201 and extension portions 202, the number of bent portions 201 is at least three, each extension portion 202 is located between adjacent bent portions 201, and the bending directions of adjacent bent portions 201 are opposite.

[0077] Referring again to Figure 6, when the connecting structure 200 is in its initial state, at least one bend 201 in the connecting structure 200 and the extension 202 connected to one end of the bend 201 conform to the following: along the reference direction X, the distance J between the centerline of the bend 201 and the extension 202 gradually decreases; the centerline of the bend 201 is a straight line along the radial direction of the bend 201 and passing through the midpoint of the bend 201, and the reference direction X is along the centerline M of the bend 201 and from the midpoint of the bend 201 toward the end of the extension 202 away from the bend 201.

[0078] The display panel 1000 provided in the embodiments of this disclosure has a gradually decreasing distance J between the centerline of the bent portion 201 and the extension portion 202 along the reference direction X. On the one hand, compared with the case where the distance J between the centerline of the bent portion 201 and the extension portion 202 is equal along the reference direction X, the connecting structure 200 of this embodiment increases the radius of the bent portion 201, thereby increasing the length of the connecting structure 200. Since the length of the connecting structure 200 increases, the ratio of the deformation of the connecting structure 200 to its original length decreases when the stretching amount among the multiple display portions 100 is the same. This results in smaller deformation of the signal lines on the connecting structure 200, making the signal lines less prone to breakage and improving their fatigue resistance. On the other hand, during stretching, the extension portion 202 is stretched first, which allows the stress to transition smoothly from the extension portion 202 to the bent portion 201, reducing the stress on the bent portion 201, increasing the number of uses of the connecting structure 200, and thus improving the lifespan of the connecting structure 200. Therefore, the display panel 1000 provided in this embodiment has a high tensile strength and a long service life.

[0079] In some embodiments, referring to FIG6, the bending portion 201 includes a first bending portion 21, and the extension portions 202 connected to both ends of the first bending portion 21 are a first extension portion 212 and a second extension portion 222; when the connecting structure 200 is in the initial state, along the reference direction X, the distance J1 between the centerline M of the first bending portion 21 and the first extension portion 212 gradually decreases, and the distance J2 between the centerline of the first bending portion 21 and the second extension portion 222 gradually decreases.

[0080] When the display panel 1000 is stretched along a direction perpendicular to the reference direction X, the first extension 212 and the second extension 222 are initially subjected to tensile force, becoming the primary stress-bearing areas and thus preventing the first bending portion 21 from directly bearing excessive stress. As the first extension 212 and the second extension 222 are stretched, the distance between them gradually increases, and stress is gradually transferred from the first extension 212 and the second extension 222 to the first bending portion 21. This gradual transition avoids sudden stress concentration at the first bending portion 21, thereby reducing the risk of fatigue or fracture in the first bending portion 21. Since reducing stress concentration at the first bending portion 21 significantly improves its fatigue resistance and material durability, it extends the service life of the connection structure 200 and reduces usage and maintenance costs.

[0081] In some embodiments, referring further to Figures 5 and 6, the bending portion 201 further includes a second bending portion 22. One end of the second bending portion 22 is connected to the side of the display portion 100, and the other end of the second bending portion 22 is connected to the first bending portion 21 via an extension portion 202. A connecting structure 200 includes two second bending portions 22, which are located at opposite ends of the connecting structure 200. The second bending portion 22 is directly connected to the side of the display portion 100 and connected to the first bending portion 21 via the extension portion 202. This effectively disperses external forces and improves the overall stability of the connecting structure 200. The introduction of the second bending portion 22 makes the stress distribution in the connecting structure 200 more uniform. When the display panel 1000 is stretched or bent, the stress is smoothly transmitted to the first bending portion 21 through the second bending portion 22 and the extension portion 202, reducing stress concentration and thus reducing the risk of fatigue and damage to the connecting structure 200.

[0082] For example, referring to Figures 5 and 6, a connecting structure 200 includes a first bend 21 and two second bends 22, with the two second bends 22 located at opposite ends of the connecting structure 200. A first extension 212 and a second extension 222 are connected to opposite ends of the first bend 21, one second bend 22 is connected to the first extension 212, and the other second bend 22 is connected to the second extension 222. This design of one first bend 21 and two second bends 22 in the connecting structure 200 introduces multiple bends 201. The multiple bends 201 optimize the transmission path of tensile force, allowing the tensile force to be evenly distributed across the connecting structure 200 when the display panel 1000 is stretched, preventing stress concentration at a single bend 201, reducing local strain, and thus extending the service life of the connecting structure 200.

[0083] In some embodiments, referring to FIG5, adjacent display units 100 are respectively a first display unit 101 and a second display unit 102. The first display unit 101 includes a first side C1, and the second display unit 102 includes a second side C2. The first side C1 and the second side C2 are arranged facing each other. The two ends of the connecting structure 200 are respectively connected to the first side C1 and the second side C2. This ensures that during the stretching of the display panel 1000, the stretching direction of the connecting structure 200 is consistent with the extension direction of the display unit 100, which makes the stretching smoother and allows for more precise control of the stretching amount of the connecting structure 200. This avoids misalignment of the display unit 100 due to stretching, which could lead to twisting or structural deformation of the display panel 1000. In addition, it allows the multiple display units 100 to be arranged more compactly in the initial state of the display panel 1000, and provides a larger display area during stretching.

[0084] In some embodiments, referring to Figures 5 and 6, the connecting structure 200 includes three bends 201, with the middle bend 201 being the first bend 21. The connection positions of one end of the connecting structure 200 with the first side C1 and the connection positions of the other end of the connecting structure 200 with the second side C2 are symmetrical about the centerline M of the first bend 21. This symmetrical bending design of the connecting structure 200 optimizes the transmission path of tensile force, ensuring that stress is evenly distributed across all parts of the connecting structure 200, thus avoiding local stress concentration and reducing the risk of local fatigue failure. Furthermore, the first bend 21, as the middle bend, works together with the second bends 22 on both sides to prevent the connecting structure 200 from twisting due to unbalanced forces.

[0085] For example, referring to Figures 5 and 6, the number of connection structures 200 between adjacent display sections 100 is one; the first side C1 includes a first end D1 and a second end D2, the second side C2 includes a third end D3 and a fourth end D4, and the first end D1 and the third end D3 are symmetrical about the center line M of the first bend 21; one end of the connection structure 200 is connected to the first end D1, and the other end of the connection structure 200 is connected to the third end D3; the first bend 21 of the connection structure 200 is located close to the second end D2 and the fourth end D4.

[0086] With the two ends of the connecting structure 200 connected to the same end of the adjacent display section 100 and located at the side edge of the display section 100, the total length of the connecting structure 200 and the length of the extension can be increased. The longer the total length of the connecting structure 200, the more the connecting structure 200 will deform under tension when the display panel 1000 is stretched. In this case, the ratio of the deformation of the connecting structure 200 to its original length will decrease accordingly, making the signal lines on the connecting structure 200 less prone to breakage and improving the fatigue resistance of the signal lines. Secondly, the deformation stress can also be more evenly distributed over a longer path, reducing local stress concentration and improving the reliability of the connecting structure 200.

[0087] In some embodiments, continuing to refer to FIG5, the plurality of display units 100 include a plurality of repeating units, each repeating unit including four display units 100 arranged in a 2×2 array, and four connecting structures 200 connecting the four display units 100; among the four connecting structures 200, the first bending portions 21 of adjacent connecting structures 200 along the first direction Y1 are arranged close to each other, and the first bending portions 21 of adjacent connecting structures 200 along the second direction Y2 are arranged far apart from each other; one of the first direction Y1 and the second direction Y2 is the row direction in which the four display units 100 are arranged, and the other is the column direction in which the four display units 100 are arranged. This not only facilitates the symmetry of the stretching and makes the overall tensile force more evenly distributed, but also makes better use of the interval between the display units 100, maximizing the length of the connecting structure 200, thereby reducing the strain of the connecting structure 200.

[0088] Referring to Figure 5, the distance L1 between the midpoint of the first bend 21 and the end of the connecting structure 200 along the reference direction X is greater than the side length L2 of the first side C1. This maximizes the length of the connecting structure 200, reduces the strain of the connecting structure 200, makes the signal lines on the connecting structure 200 less prone to breakage, and improves the fatigue resistance of the signal lines.

[0089] Referring to Figure 7, there are two connecting structures 200 between adjacent display units 100; the connection position of one end of the connecting structure 200 to the first side C1 is spaced apart from both ends of the first side C1; the connection position of the other end of the connecting structure 200 to the second side C2 is spaced apart from both ends of the second side C2; ​​the first bending portions 21 of the two connecting structures 200 located between adjacent display units 100 are arranged far apart from each other.

[0090] In this design, there are two connecting structures 200 between adjacent display units 100. This allows the tensile force to be evenly distributed between the two connecting structures 200, preventing any single connecting structure 200 from experiencing excessive strain. With only one connecting structure 200 between adjacent display units 100, all stress is concentrated on a single path, easily leading to excessive local stress. Compared to having only one connecting structure 200 between adjacent display units 100, which distributes the same stress evenly across two paths, reducing the strain of a single connecting structure 200, even if one of the connecting structures 200 develops microcracks due to fatigue, the symmetrical other connecting structure 200 can still maintain its tensile function, delaying overall failure and enhancing the reliability of the display panel 1000.

[0091] Furthermore, the first bending portions 21 of the two connecting structures 200 located between adjacent display units 100 are positioned far apart from each other. This provides more space for the first bending portions 21 of the connecting structures 200, further increasing the radius of the first bending portions 21. Increasing the radius of the first bending portions 21 can not only effectively reduce local stress concentration but also reduce the strain of the connecting structures 200. Secondly, the far-away arrangement makes the deformation of the first bending portions 21 of each connecting structure 200 more independent, allowing the two connecting structures 200 to expand outward synchronously when the display unit 100 is subjected to stress and deformation.

[0092] Referring to Figure 8, the two connecting structures 200 located between adjacent display units 100 are symmetrical about the line S connecting the centers O of the adjacent display units 100. This symmetrical design of the two connecting structures 200 can counteract asymmetrical deformation. For example, when the display panel 1000 is stretched, the symmetrical connecting structures 200 deform synchronously, preventing the display panel 1000 from twisting or tilting due to uneven stress. Therefore, this balances deformation and reduces the risk of the display panel 1000 twisting.

[0093] Referring again to Figure 7, the distance L3 between the midpoints of the first bends 21 of the two connecting structures 200 between adjacent display sections 100 is greater than the side length L2 of the adjacent first side C1. This extends the length of the connecting structure 200, reduces the strain of the connecting structure 200, makes the signal lines on the connecting structure 200 less prone to breakage, and improves the fatigue resistance of the signal lines.

[0094] In some embodiments, referring further to Figures 5 and 6, both the first extension 212 and the second extension 222 form an angle with the center line M of the first bending portion 21, and the first extension 212 and the second extension 222 are symmetrically arranged about the center line M of the first bending portion 21. First, the fact that both the first extension 212 and the second extension 222 form an angle with the center line M of the first bending portion 21 increases the length of the connecting structure, thereby reducing the strain of the connecting structure 200. Second, the symmetrical arrangement allows the first extension 212 and the second extension 222 to balance each other under stress during stretching, preventing the bending portion from twisting or shifting due to uneven stress, ensuring that the display panel remains flat during stretching, thereby enhancing the stability of the overall structure and improving the display effect of the display panel 1000.

[0095] In some embodiments, referring to Figures 9 and 10, the connecting structure 200 includes four bends 201, the two middle bends 201 being first bends 21; the connection position between one end of the connecting structure 200 and the first side C1 is the first connection position, the connection position between the other end of the connecting structure 200 and the second side C2 is the second connection position, and the angle between the line connecting the first connection position and the second connection position and the centerline of any of the first bends 21 is an acute angle.

[0096] This increases the number of bends 201 in the connecting structure 200, which in turn increases the number of connecting parts 202, thereby increasing the overall length of the connecting structure 200. Because the connecting structure 200 has a longer overall length, when the stretching amount between multiple display parts 100 is the same, the ratio of the deformation amount of the connecting structure 200 to its original length will decrease. This results in smaller deformation of the signal lines on the connecting structure 200, making the signal lines less prone to breakage and improving their fatigue resistance.

[0097] In some embodiments, continuing to refer to Figures 9 and 10, when the connecting structure 200 includes four bends 201, and the two middle bends 201 are both first bends 21, the extension 202 connecting the two first bends 21 of the connecting structure 200 is parallel to the first side C1. This allows the bending degree of the extension 202 located between the two first bends 21 to be symmetrically distributed on both sides of the bends 201 and the extension 202, thereby making the display panel 1000 more evenly stressed during the stretching process, reducing local stress concentration, and also helping to maintain the flatness of the display panel 1000, avoiding deformation or distortion of the display area caused by asymmetrical bending, thereby improving the display effect. Secondly, it can also maximize the bending radius of the two middle first bends 21, improving the fatigue resistance of the connecting structure 200.

[0098] Referring again to Figure 9, when the connecting structure 200 includes four bends 201, the number of connecting structures 200 between adjacent display units 100 can be one; the first side C1 includes a first end D1 and a second end D2, and the second side C2 includes a third end D3 and a fourth end D4. The first end D1 and the third end D3 are symmetrical about the center line M of the first bend 21; one end of the connecting structure 200 is connected to the second end D2, and the other end of the connecting structure 200 is connected to the third end D3. In the connecting structure 200, one first bend 21 is disposed near the first end D1, and the other first bend 21 is disposed near the fourth end D4.

[0099] First, the design of the multiple bends 201 enables a longer effective stretching path within the limited space between adjacent display sections 100, thus accommodating greater deformation requirements. Second, the single connection structure 200 between adjacent display sections 100 reduces the space occupied by each structure, facilitating a more compact layout within the limited space and simplifying the overall design of the display panel 1000. This avoids mechanical interference that could occur with multiple connection structures 200, resulting in more even stress distribution during stretching. Furthermore, reducing the number of connection structures 200 lowers manufacturing complexity, thereby improving the overall reliability of the display panel 1000. Simultaneously, the reduced number of connection structures 200 simplifies signal transmission paths, reducing crossovers and interference between signal lines, and improving signal transmission stability and clarity.

[0100] When the connecting structure 200 includes four bends 201, the “symmetry” in the above statement “the first end D1 and the third end D3 are symmetrical about the center line M of the first bend 21” is not symmetrical in a strict sense. That is, the distances from the first end D1 and the third end D3 to the center line M of the first bend 21 are not equal. Referring to Figure 9, it only means that the first end D1 and the third end D3 are located on both sides of the center line M, and their positions on both sides of the center line M are corresponding to each other.

[0101] In some embodiments, referring to Figures 9 and 10, when the connecting structure 200 includes four bends 201 and the number of connecting structures 200 between adjacent display sections 100 is one, the distance L4 between the midpoint of the two first bends 21 in the connecting structure 200 and the end of the connecting structure 200 along the reference direction X is greater than the side length L1 of the first side C1. This allows for a longer effective stretching path within the limited space between adjacent display sections 100, providing a larger deformation space for the connecting structure 200, enabling it to better adapt to stretching and bending. During stretching, stress can also be more evenly distributed throughout the connecting structure 200, rather than concentrated at the ends of the connecting structure 200 or the edges of the display section 100, thereby reducing the risk of fatigue or fracture of the connecting structure 200 material. Secondly, the larger distance design can also buffer the direct impact of stretching force on the sides of the display section 100. The longer the redundant length that the connecting structure 200 can unfold during stretching, the higher the stretching rate can be supported. The larger distance design can also maintain the geometric stability of the bent section 201, ensuring that it can return to its original shape after stretching.

[0102] In some embodiments, referring to Figures 11 and 12, when the connecting structure 200 includes four bends 201, the connecting structure 200 between adjacent display portions 100 includes a first connecting structure 11 and a second connecting structure 12; the first side C1 includes a first end D1 and a second end D2, the second side C2 includes a third end D3 and a fourth end D4, and the first end D1 and the third end D3 are symmetrical about the center line M of the first bend 21; one end of the first connecting structure 11 has a gap between it and both the first end D1 and the second end D2, and the other end of the first connecting structure 11 is connected to the third end D3; one end of the second connecting structure 12 is connected to the second end D2, and the other end of the second connecting structure 12 has a gap between it and both the third end D3 and the fourth end D4.

[0103] First, when the connecting structure 200 includes four bends 201, the connecting structure 200 with multiple bends 201 can provide more degrees of freedom in deformation and adapt to complex stretching directions. Second, when the connecting structure 200 includes a first connecting structure 11 and a second connecting structure 12, the tensile or bending stress between adjacent display parts 100 will be distributed and transmitted through two paths, avoiding stress concentration on a single path and significantly reducing the risk of breakage. If one of the connecting structures 200 fails due to fatigue or damage, the other can still maintain the mechanical connection. It can also provide a backup signal path to prevent display failure caused by a single path breakage. Multi-path conductivity can reduce resistance changes during stretching and ensure the stability of the display signal. The two connecting structures 200 can also constrain the relative displacement of the display parts 100 during stretching, reducing twisting or misalignment between the display parts 100.

[0104] Similarly, when the connecting structure 200 includes four bends 201, the “symmetry” in the above statement “the first end D1 and the third end D3 are symmetrical about the center line M of the first bend 21” is not symmetrical in a strict sense. That is, the distances from the first end D1 and the third end D3 to the center line M of the first bend 21 are not equal. Referring to Figure 11, it only means that the first end D1 and the third end D3 are located on both sides of the center line M, and their positions on both sides of the center line M are corresponding to each other.

[0105] In some embodiments, referring to Figures 11 and 12, when the connecting structure 200 includes four bends 201 and the connecting structure 200 between adjacent display sections 100 includes a first connecting structure 11 and a second connecting structure 12, in the two first bends 21 of the connecting structure 200, the distance along the reference direction X between the midpoint of one first bend 21 and the end of its adjacent connecting structure 200 is greater than half the side length L1 of the first side C1 and less than the side length L1 of the first side C1; the distance along the reference direction X between the midpoint of the other first bend 21 and the end of its adjacent connecting structure 200 is less than or equal to half the side length L1 of the first side C1.

[0106] Along the reference direction X, the distance between the midpoint and the end of one first bend 21 is greater than half the side length L1 of the first side C1, which provides more space for deformation, allowing the connecting structure 200 to better adapt to stretching and bending, and improving overall flexibility; the distance between the midpoint and the end of the other first bend 21 is less than or equal to half the side length L1 of the first side C1, which helps to maintain the stability of the connecting structure 200 during stretching and prevents excessive deformation or twisting; by optimizing the geometry of the connecting structure 200, a more compact and efficient layout can be achieved between adjacent display sections 100, reducing mechanical interference between the first connecting structure 11 and the second connecting structure 12, and also helping to reduce fatigue damage to the connecting structure 200 during stretching and extend its service life.

[0107] In some embodiments, referring to FIG11, when the connecting structure 200 includes four bends 201, and the connecting structure 200 between adjacent display portions 100 includes a first connecting structure 11 and a second connecting structure 12, the first connecting structure 11 and the second connecting structure 12 are centrally symmetrical about the midpoint of the line S connecting the centers O of the adjacent display portions 100. This centrally symmetrical design allows the stress generated during stretching or bending to be evenly distributed on the first connecting structure 11 and the second connecting structure 12, avoiding local stress concentration and thus reducing the risk of damage to the connecting structure 200. Secondly, the centrally symmetrical layout keeps the connecting structure 200 balanced under stress, preventing twisting or deformation caused by asymmetrical stress and improving the overall structural stability. Furthermore, the centrally symmetrical design allows the first connecting structure 11 and the second connecting structure 12 to work synergistically during stretching, providing greater deformation space and better flexibility to adapt to more complex deformation requirements.

[0108] In some embodiments, referring to FIG13, adjacent display portions 100 are respectively a first display portion 101 and a second display portion 102. The first display portion 101 includes a first side C1, and the second display portion 102 includes a second side C2. The first side C1 and the second side C2 are disposed facing each other. The first display portion also includes a third side C3 connected to the first side C1. One end of the connecting structure 200 is connected to the third side C3, and the other end of the connecting structure 200 is connected to the second side C2. That is, the two ends of the connecting structure are respectively located on the mutually perpendicular sides of the adjacent display portions 100. This can maximize the radius of the bending portion 201, that is, maximize the length of the connecting structure 200. With the same stretching amount among multiple display portions 100, the ratio of the deformation amount of the connecting structure 200 to the original length will be reduced. As a result, the deformation of the signal line on the connecting structure 200 is also small, making the signal line less prone to breakage and improving the fatigue resistance of the signal line.

[0109] In some embodiments, referring to FIG13, the connection position of the connecting structure 200 and the third side C3 is close to the first side C1; the second side C2 includes a fifth end D5 close to the third side C3, and the connection position of the connecting structure 200 and the second side C2 is the fifth end D5. The connection position of the connecting structure 200 and the second side C2 is located at the end of the second side C2, which can provide a larger deformation space for the connecting structure 200, maximize the radius of the bending portion 201, thereby reducing the strain of the connecting structure 200, and also enable it to better adapt to tension and bending. It can also make the layout of the connecting structure 200 and the second side C2 more compact and reduce mechanical interference.

[0110] In some embodiments, referring to Figures 13 and 14, the bending portion 201 of the connecting structure 200 includes a third bending portion 23, one end of which is connected to the display portion 100, and the extension portion 202 connected to the other end of the third bending portion 23 is a third extension portion 232. When the connecting structure 200 is in its initial state, the distance J between the centerline M of the third bending portion 23 and the third extension portion 232 gradually decreases along the reference direction X. Since the distance J between the centerline M of the third bending portion 23 and the third extension portion 232 gradually decreases along the reference direction X, the radius of the bending portion 201 can be increased, thereby increasing the length of the connecting structure 200. Because the length of the connecting structure 200 increases, the ratio of the deformation of the connecting structure 200 to its original length decreases when the stretching amount among the multiple display portions 100 is the same. This results in a smaller deformation of the signal lines on the connecting structure 200, making the signal lines less prone to breakage and improving their fatigue resistance.

[0111] In some embodiments, referring to FIG15, the connection structure 200 between adjacent display units 100 includes a first connection structure 21 and a second connection structure 22; the adjacent display units 100 are respectively a first display unit 101 and a second display unit 102, the first display unit 101 includes a first side C1, the second display unit 102 includes a second side C2, the first side C1 and the second side C2 are disposed facing each other; the first display unit 101 also includes a third side C3 connected to the first side C2, the second display unit 102 also includes a fourth side C4 connected to the second side C2, the third side C3 and the fourth side C4 are respectively located on both sides of the line connecting the centers of the first display unit 101 and the second display unit 102.

[0112] In the case where the connection structure 200 between adjacent display units 100 includes a first connection structure 21 and a second connection structure 22, one end of the first connection structure 21 is connected to the third side C3, and the other end is connected to the second side C2; ​​one end of the second connection structure 22 is connected to the first side C1, and the other end is connected to the fourth side C4. This not only increases the number of connection structures 200 between adjacent display units 100, allowing tensile or bending stress between adjacent display units 100 to be distributed and transmitted through two paths, avoiding stress concentration on a single path and significantly reducing the risk of breakage; secondly, it also maximizes the bending radius of the first connection structure 21 and the second connection structure 22, providing greater deformation space for the first connection structure 21 and the second connection structure 22, thereby reducing the strain of the first connection structure 21 and the second connection structure 22 and improving the fatigue resistance of the signal line.

[0113] In some embodiments, referring to FIG11 or FIG15, the midpoint of the line S connecting the centers O of the first display portion 101 and the second display portion 102 is a reference midpoint N, and the first connecting structure 11 and the second connecting structure 12 are symmetrical about the reference midpoint N. This allows the first display portion 101 and the second display portion 102 to deform synchronously, preventing misalignment of the first display portion 101 and the second display portion 102 due to asymmetrical deformation, which would otherwise degrade the visual effect of the display panel 1000.

[0114] In some embodiments, a plurality of connection structures 200 are arranged around the display portion 100, and the plurality of connection structures 200 are centrally symmetrical about the center of the display portion 100. This allows the tensile force of the display panel 1000 during the stretching process to be evenly distributed around the display portion 100, avoiding stress concentration on one side of the display portion 100 that could lead to breakage of the connection structure 200 or the signal lines on the connection structure 200 on one side. Furthermore, the plurality of connection structures 200 surrounding the display portion 100 can cooperate with each other, allowing the display panel 1000 to be flexibly stretched in multiple directions to adapt to different stretching requirements, thereby improving the overall flexibility and adaptability of the display panel 1000.

[0115] In some embodiments, the spacing between adjacent display portions 100 of the display panel 1000 is equal. This allows the tensile force to be distributed more evenly among the display portions 100 when the display panel 1000 is stretched, preventing excessive pressure on certain display portions 100 and thus avoiding distortion or deformation of the display panel 1000. Secondly, during the stretching process, all display portions 100 of the display panel 1000 can deform synchronously, ensuring display quality and making the image transition on the display panel 1000 more natural during the stretching process.

[0116] In some embodiments, the width of the connecting structure 200 is equal along its extending direction, and the width of the connecting structure 200 is the dimension of the connecting structure 200 perpendicular to its extending direction. This allows the connecting structure 200 to deform uniformly when the display panel 1000 is stretched, preventing stress concentration caused by uneven width. This uniform deformation characteristic enables the connecting structure 200 to better maintain its functionality and reliability during long-term use, thereby extending the overall service life of the display panel 1000.

[0117] The display panel 1000 shown in Figure 1 was subjected to a tensile test, with a stretch of 20%. After 10,000 stretches, the connection structure was found to have cracks during the stretching process. See Figure 16 or Figure 17 for specific crack diagrams after stretching.

[0118] The display panel 1000 shown in Figure 5 was subjected to a tensile test, with a stretch of 20%. The test verified that after 10,000 stretches, the maximum strain of its connecting structure 200 was 4.22%. Specific structural data after stretching can be found in Figure 18. Crack diagrams from the tensile test can be found in Figures 19 or 20; no obvious cracks were observed under a microscope.

[0119] A tensile test was conducted on the display panel 1000 shown in Figure 3. When the tensile amount reached 20%, the test verified that the maximum strain of its connecting structure 200 was 5.55%. The specific structural data after the stretching can be found in Figure 21.

[0120] In the display panel 1000 shown in Figure 3, referring to Figure 4, the width of the connecting structure 200 is W, and the distance between adjacent display sections 100 is H. Therefore, the distance Gap1 between the side edge of the display section 100 and its adjacent extension 202 is (H-3W) / 4, and the bending radius of its bent section 201 is Gap1 / 2, which is (H-3W) / 8. The minimum spacing Gap2 between the bent sections 201 is the minimum width achievable by the etching process, approximately 5μm to 8μm, for example, 5μm, 6μm, 7μm, or 8μm.

[0121] In the display panel 1000 shown in Figure 9, the distance Gap1 between the side of the display section 100 and its adjacent extension 202 is shortened to about 5μm, so that one end of the connecting structure 200 is closer and the bending radius of the bending section 201 is increased, thereby increasing the radius of the bending section. At the same time, the minimum spacing Gap2 between the bending sections 201 is kept to a minimum size, which is about 5μm. Taking the distance H between adjacent display sections 100 as 223.5μm and the width W of the connecting structure 200 as 50μm as an example, the bending radius of the bending section 201 can be increased from 9.2μm to 15.5μm, an increase of about 68.48%. As a result, the total length of the connecting structure 200 can be increased. Since the length of the connecting structure 200 is increased, the ratio of the deformation of the connecting structure 200 to its original length will decrease when the stretching amount between multiple display units 100 is the same. This results in a smaller deformation of the signal lines on the connecting structure 200, which makes the signal lines less prone to breakage and improves the fatigue resistance of the signal lines.

[0122] A tensile test was conducted on the display panel 1000 shown in Figure 9. When the tensile amount reached 20%, the maximum strain of its connecting structure 200 was verified to be 5.19%. Specific structural data after tensile testing can be found in Figure 22. Specific structural data after tensile testing can also be found in Figure 18. The crack diagram from the tensile test can be found in Figure 23.

[0123] Comparing the display panel 1000 shown in Figure 9 with the display panel 1000 shown in Figure 3, the strain decreased from 5.55% to 5.19% after increasing the radius of the bending portion 201. Comparing the display panel 1000 shown in Figure 9 with the display panel 1000 shown in Figure 5, the connecting structure 200 in Figure 5 includes three bending portions 201, which have a larger radius than the bending portions 201 in the display panel 1000 in Figure 9. The strain of the connecting structure 200 further decreased to 4.22%. Therefore, it can be seen that, with the same width, thickness, and length of the connecting structure 200, increasing the radius of curvature of the bending portion 201 can effectively reduce stress and further improve the reliability of the connecting structure under tension.

[0124] Embodiments of this disclosure also provide a display device 3000, referring to FIG24, including: a display panel 1000 as described in any of the above embodiments; and a circuit board 2000. The circuit board 2000 is coupled to the display panel 1000.

[0125] The circuit board 2000 is used to input various signals required for displaying images into the display panel 1000, such as control signals, power supply voltage signals, and data signals.

[0126] The aforementioned display device 3000 can be any device that displays either moving (e.g., video) or fixed (e.g., still image) content, and whether it is text or image content.

[0127] For example, the display device 3000 can be any product or component with display function, such as a stretchable laptop, tablet, personal digital assistant (PDA), mobile phone, watch, clock, calculator, GPS receiver / navigator, camera, camera view display (e.g., a rearview camera display in a vehicle), wearable device, augmented reality (AR) device, virtual reality (VR) device, in-vehicle display, or flight display.

[0128] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display panel, comprising: Multiple display units, wherein the multiple display units are separated from each other; A connection structure is located between adjacent display units and connects adjacent display units; The connection structure includes: alternating bent portions and extension portions, wherein the number of bent portions is at least three, each extension portion is located between adjacent bent portions, and the bending directions of adjacent bent portions are opposite. When the connection structure is in its initial state, at least one bend and an extension connected to one end of the bend in the connection structure conform to the following: along a reference direction, the distance between the centerline of the bend and the extension gradually decreases; the centerline of the bend is a straight line along the radial direction of the bend and passing through the midpoint of the bend; and the reference direction is along the centerline of the bend and from the midpoint of the bend toward the end of the extension away from the bend.

2. The display panel according to claim 1, wherein, The bending portion includes a first bending portion, and the extension portions connected to both ends of the first bending portion are the first extension portion and the second extension portion respectively. When the connection structure is in its initial state, along the reference direction, the distance between the centerline of the first bend and the first extension gradually decreases, and the distance between the centerline of the first bend and the second extension gradually decreases.

3. The display panel according to claim 2, wherein, The bending portion further includes a second bending portion, one end of which is connected to the side of the display portion, and the other end of which is connected to the first bending portion through the extension portion; One of the connecting structures includes two second bends, which are located at both ends of the connecting structure.

4. The display panel according to claim 2 or 3, wherein, The adjacent display units are a first display unit and a second display unit, the first display unit includes a first side, the second display unit includes a second side, and the first side and the second side are arranged facing each other; The two ends of the connection structure are respectively connected to the first side and the second side.

5. The display panel according to claim 4, wherein, The connecting structure includes three bending portions, and the bending portion located in the middle of the three bending portions is the first bending portion; The connection positions of one end of the connecting structure to the first side and the other end of the connecting structure to the second side are symmetrical about the centerline of the first bend.

6. The display panel according to claim 5, wherein, The number of connection structures between adjacent display units is one; The first side includes a first end and a second end, the second side includes a third end and a fourth end, the first end and the third end are symmetrical about the centerline of the first bend; one end of the connecting structure is connected to the first end, and the other end of the connecting structure is connected to the third end; The first bend in the connecting structure is located near the second end and the fourth end.

7. The display panel according to claim 6, wherein, The plurality of display units include a plurality of repeating units, each of the repeating units including four display units arranged in a 2×2 array, and four connecting structures connecting the four display units; In the four connection structures, the first bends of adjacent connection structures along the first direction are arranged close to each other, and the first bends of adjacent connection structures along the second direction are arranged far apart from each other; one of the first direction and the second direction is the row direction in which the four display units are arranged, and the other is the column direction in which the four display units are arranged.

8. The display panel according to claim 6 or 7, wherein, The distance along the reference direction between the midpoint of the first bend and the end of the connecting structure is greater than the side length of the first side.

9. The display panel according to claim 5, wherein, The number of connection structures between adjacent display units is two; The connection point of one end of the connecting structure to the first side has a gap between it and both ends of the first side; the connection point of the other end of the connecting structure to the second side has a gap between it and both ends of the second side. The first bends of the two connecting structures located between adjacent display sections are positioned far apart from each other.

10. The display panel according to claim 8, wherein, The two connection structures located between adjacent display units are symmetrical about the line connecting the centers of the adjacent display units.

11. The display panel according to claim 9 or 10, wherein, The distance between the midpoints of the first bends of the two connecting structures between adjacent display units is greater than the side length of the adjacent first side.

12. The display panel according to any one of claims 5 to 11, wherein, Both the first extension and the second extension form an angle with the centerline of the first bend, and the first extension and the second extension are symmetrically arranged about the centerline of the first bend.

13. The display panel according to claim 4, wherein, The connecting structure includes four bending portions, and the two bending portions located in the middle of the four bending portions are both the first bending portions; The connection position between one end of the connecting structure and the first side is the first connection position, and the connection position between the other end of the connecting structure and the second side is the second connection position. The angle between the line connecting the first connection position and the second connection position and the centerline of any of the first bends is an acute angle.

14. The display panel according to claim 13, wherein, The number of connection structures between adjacent display units is one; The first side includes a first end and a second end, and the second side includes a third end and a fourth end, wherein the first end and the third end are symmetrical about the centerline of the first bend; One end of the connection structure is connected to the second end, and the other end of the connection structure is connected to the third end; In the connection structure, one of the first bends is disposed near the first end, and the other of the first bends is disposed near the fourth end.

15. The display panel according to claim 14, wherein, Along the reference direction, the distance between the midpoints of the two first bends in the connecting structure and the end of the connecting structure is greater than the side length of the first side.

16. The display panel according to claim 13, wherein, The connection structure between adjacent display units includes a first connection structure and a second connection structure; The first side includes a first end and a second end, the second side includes a third end and a fourth end, the first end and the third end are symmetrical about the centerline of the first bend; one end of the first connecting structure has a gap between it and both the first end and the second end, and the other end of the first connecting structure is connected to the third end; One end of the second connecting structure is connected to the second end, and the other end of the second connecting structure is spaced apart from both the third end and the fourth end.

17. The display panel according to claim 16, wherein, In the two first bends of the connecting structure The distance along the reference direction between the midpoint of a first bend and the end of the adjacent connecting structure is greater than half the side length of the first side and less than the side length of the first side. The distance along the reference direction between the midpoint of the other first bend and the end of the adjacent connecting structure is less than or equal to half the side length of the first side.

18. The display panel according to claim 16 or 17, wherein, The first connection structure and the second connection structure are centrally symmetrical about the midpoint of the line connecting the centers of adjacent display units.

19. The display panel according to any one of claims 13 to 18, wherein, The extension connecting the two first bends of the connecting structure is parallel to the first side.

20. The display panel according to claim 2 or 3, wherein, The adjacent display units are a first display unit and a second display unit, the first display unit includes a first side, the second display unit includes a second side, and the first side and the second side are disposed facing each other; the first display unit also includes a third side connected to the first side. One end of the connecting structure is connected to the third side, and the other end of the connecting structure is connected to the second side.

21. The display panel according to claim 20, wherein, The connection structure is located close to the first side when it connects to the third side. The second side includes a fifth end near the third side, and the connection position between the connecting structure and the second side is the fifth end.

22. The display panel according to claim 1, wherein, The bending portion includes a third bending portion, one end of which is connected to the display portion, and the extension portion connected to the other end of the third bending portion is a third extension portion. With the connection structure in its initial state, the distance between the centerline of the third bend and the third extension gradually decreases along the reference direction.

23. The display panel according to claim 22, wherein, The connection structure between adjacent display units includes a first connection structure and a second connection structure; The adjacent display units are a first display unit and a second display unit. The first display unit includes a first side, and the second display unit includes a second side. The first side and the second side are arranged facing each other. The first display unit also includes a third side connected to the first side, and the second display unit also includes a fourth side connected to the second side. The third side and the fourth side are located on both sides of the line connecting the centers of the first display unit and the second display unit, respectively. One end of the first connecting structure is connected to the third side, and the other end of the first connecting structure is connected to the second side; One end of the second connecting structure is connected to the first side, and the other end of the second connecting structure is connected to the fourth side.

24. The display panel according to claim 23, wherein, The midpoint of the line connecting the centers of the first display unit and the second display unit is a reference midpoint, and the first connecting structure and the second connecting structure are symmetrical about the reference midpoint.

25. The display panel according to any one of claims 1 to 24, wherein, The plurality of connection structures are arranged around the display unit, and the plurality of connection structures are centrally symmetrical about the center of the display unit.

26. A display device, comprising: The display panel as described in any one of claims 1 to 25; as well as, The circuit board is coupled to the display panel.

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