Display panel and display device

Abstract

The application relates to a display panel and a display device. The display panel comprises a first substrate and a display layer. The first substrate comprises buffer structures arranged in an array, and the display layer comprises display islands arranged in an array. Each display island corresponds to at least one buffer structure. The orthographic projection of the display island on the first substrate at least partially overlaps the orthographic projection of the corresponding buffer structure on the first substrate. The application adds buffer structures between the display island and the first substrate, which can effectively absorb and relieve the stress and strain generated by the shear motion of the first substrate and the display island. By reducing the transmission of stress and strain to the display island, the damage of stress and strain to each film layer in the display island is reduced, and the display performance of the display device is improved.

Description

Technical Field

[0001] This application relates to the field of display device technology, and more particularly to a display panel and a display device. Background Technology

[0002] Flexible display devices that can be bent and folded are currently under active development, and even further, stretchable display devices that can change shape are also the future direction of display technology development.

[0003] Currently, stretchable display devices consist of display islands, connecting bridges, and cutout sections. In general display devices, the elastic substrate (Top Film / Bottom Film) is bonded to the display substrate with organic adhesive. During the stretching process, the adhesive and elastic substrate under the display substrate undergo shearing motion with the display substrate. The interaction force leads to an increase in stress and strain on the display island. Furthermore, the greater the Young's modulus of the adhesive and elastic substrate, the greater the stress and strain on the display island. This causes irreversible deformation and damage to the inorganic layers, organic layers, substrates, circuits, etc., used for encapsulation within the display island, affecting the performance of the display device. Summary of the Invention

[0004] This application provides a display panel that effectively solves the problem of easy performance failure of various film layers within a display island. A display panel includes:

[0005] The first substrate includes buffer structures arranged in an array;

[0006] The display layer disposed on the first substrate includes display islands arranged in an array, and each of the display islands corresponds to at least one of the buffer structures;

[0007] The orthographic projection of the display island on the first substrate at least partially overlaps with the orthographic projection of its corresponding buffer structure on the first substrate.

[0008] In one embodiment, the cross-sectional size of the buffer structure remains constant along the direction away from the first substrate, or the cross-sectional size of the buffer structure gradually increases along the direction away from the first substrate.

[0009] In one embodiment, the buffer structure is configured as a hollow structure.

[0010] In one embodiment, at least a portion of the buffer structure has a ring shape in its orthographic projection onto the display island.

[0011] In one embodiment, when the entire orthographic projection of the buffer structure onto the display island is a ring shape, the orthographic projection of the buffer structure onto the display island is a single ring shape, or multiple ring shapes arranged inside and outside the ring shape.

[0012] When a portion of the buffer structure is projected in a ring shape on the display island, the buffer structure includes a first buffer portion located on the periphery and a second buffer portion located within the first buffer portion. The first buffer portion is projected in a ring shape or multiple ring shapes arranged inside and outside the display island, and the second buffer portion is projected in a non-ring shape on the display island.

[0013] In one embodiment, the ring shape is any one of a circle, a rectangle, or a polygon.

[0014] In one embodiment, the ring shape includes closed rings and non-closed rings.

[0015] In one embodiment, the display island further includes a display substrate and a light-emitting device located on the display substrate; the orthographic projection shape of the buffer structure on the display island matches the shape of the outer edge of the light-emitting device.

[0016] In one embodiment, the display panel further includes a second substrate located on the side of the display layer away from the first substrate, the second substrate including the buffer structures arranged in an array, and each of the display islands corresponding to at least one of the buffer structures;

[0017] The orthographic projection of the display island on the second substrate at least partially overlaps with the orthographic projection of its corresponding buffer structure on the second substrate.

[0018] In one embodiment, the display island further includes a display substrate, an encapsulation layer, and a display unit located between the two, the display unit including a driving device and a light-emitting device arranged sequentially;

[0019] When the light-emitting device emits light through the first substrate, the orthographic projection of the buffer structure on the first substrate onto the display substrate is located outside the orthographic projection of the corresponding display unit onto the display substrate, and the orthographic projection of the buffer structure on the first substrate onto the display substrate is located inside the edge of the display substrate.

[0020] When the light emitter emits light through the second substrate, the orthographic projection of the buffer structure on the second substrate onto the display substrate is located outside the orthographic projection of the corresponding display unit onto the display substrate; and the orthographic projection of the buffer structure on the second substrate onto the display substrate is located inside the edge of the display substrate.

[0021] In one embodiment, the display panel further includes an adhesive layer for bonding the buffer structure and the display island, wherein the orthographic projection of the adhesive layer on the display substrate falls within the orthographic projection of the buffer structure on the display substrate; wherein

[0022] The adhesive layer includes a first adhesive layer and a second adhesive layer. The adhesive layer located between the first substrate and the display island is the first adhesive layer, and the adhesive layer located between the second substrate and the display island is the second adhesive layer.

[0023] When the light-emitting device emits light through the first substrate, the first adhesive layer is configured as an optical organic adhesive, and the second adhesive layer is configured as an organic adhesive;

[0024] When the light-emitting device emits light through the second substrate, the first adhesive layer is configured as an organic adhesive, and the second adhesive layer is configured as an optical organic adhesive.

[0025] In one embodiment, the display substrate includes at least one flexible substrate and at least one stress-barrier layer, wherein the flexible substrate and the stress-barrier layer are arranged sequentially in a direction away from the first substrate.

[0026] The Young's modulus of the stress barrier layer is greater than that of the flexible substrate.

[0027] In one embodiment, the shape of the orthographic projection of the buffer structure on the flexible substrate is the same as the shape of the orthographic projection of the stress barrier layer on the flexible substrate, and the orthographic projection of the buffer structure on the flexible substrate falls within the orthographic projection of the stress barrier layer on the flexible substrate.

[0028] In one embodiment, the first substrate and the buffer structure are an integral structure, and / or the second substrate and the buffer structure are an integral structure.

[0029] This application also provides a display device, including a display panel as mentioned in any of the above embodiments.

[0030] The technical solutions provided by the embodiments of this application may include the following beneficial effects:

[0031] As can be seen from the above embodiments, the display panel of this application includes a first substrate and a display layer. The first substrate includes buffer structures arranged in an array, and the display layer includes display islands arranged in an array. Each display island corresponds to at least one buffer structure, and the orthographic projection of the display island onto the first substrate at least partially overlaps with the orthographic projection of its corresponding buffer structure onto the first substrate. By adding buffer structures between the display islands and the first substrate, this application can effectively absorb and alleviate the stress and strain generated during shearing motion between the first substrate and the display islands. By reducing the transmission of stress and strain to the display islands, it reduces the damage to the film layers within the display islands, thereby improving the display performance of the display device.

[0032] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a display panel provided in one embodiment of this application from a certain viewing angle.

[0035] Figure 2 This is a schematic diagram of a first substrate and buffer structure provided in one embodiment of this application from a certain perspective.

[0036] Figure 3 This is a schematic diagram of the structure of a display panel provided in one embodiment of this application from a certain viewing angle.

[0037] Figures 4-7 This is a schematic diagram showing the ring shape of the buffer structure provided in one embodiment of the present application projected onto the first substrate.

[0038] Figures 8-10 This is a schematic diagram of the structure of the display island provided in one embodiment of this application from a certain perspective.

[0039] Figures 11-12 This is a schematic diagram of the structure of a display panel provided in one embodiment of this application from a certain viewing angle.

[0040] Figure label:

[0041] 1. First substrate; 2. Display island; 201. Display substrate; 2010. Flexible substrate; 2011. Stress barrier layer; 202. Light-emitting device; 203. Encapsulation layer; 3. Second substrate; 4. Buffer structure; 401. First buffer section; 402. Second buffer section; 5. Adhesive layer; 501. First adhesive layer; 502. Second adhesive layer; 100. Display area; 200. Buffer area; H. Attenuation distance. Detailed Implementation

[0042] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The manner described in the following exemplary embodiments does not represent all manner consistent with this application. Rather, they are merely examples of apparatuses consistent with some aspects of this application as detailed in the appended claims.

[0043] As described in the background art, most flexible and stretchable display devices use a connection method of display islands and connecting bridges. By setting a hollow area between the islands and bridges, a certain stretching rate can be achieved. After the applied force is removed, the display device can return to its original shape, and the display is not affected by the stretching process.

[0044] Reference Figure 1 The display island includes a display substrate 3”, thin-film transistors (not shown in the figure), and light-emitting devices 4”. The elastic substrate 1” in the display device is bonded to the display substrate 3” with adhesive 2”. During the stretching process, the adhesive 2” and the elastic substrate 1” under the display substrate 3” will undergo shearing motion with the display substrate 3”. The interaction force will cause the stress and strain of the display island to increase. The brittle materials such as thin-film transistors, light-emitting devices 4” and encapsulation film layers in the display island are extremely sensitive to stress and strain and are prone to deformation and damage during the stretching process, which reduces the overall performance of the display device.

[0045] Based on this, this application provides a display panel, including a first substrate and a display layer located on the first substrate. The first substrate includes buffer structures arranged in an array. The display layer includes display islands arranged in an array. Each display island corresponds to at least one buffer structure, and the orthographic projection of the display island on the first substrate at least partially overlaps with the orthographic projection of its corresponding buffer structure on the first substrate.

[0046] This application provides a buffer structure between the display island and the first substrate (which can also be understood as the elastic substrate mentioned above), so that during the stretching process of the display panel, it can absorb or release most of the shear force through its own deformation, reduce the force on the display island during the stretching process, and thus reduce the stress and strain between the first substrate and the display island, thereby reducing the damage to the film layer in the display island and improving the performance of the display panel.

[0047] In some embodiments of this application, the material of the first substrate 1 is not limited. Exemplarily, the material of the first substrate is selected from at least one of the following: polydimethylsiloxane (PDMS), natural rubber, nitrile rubber, styrene-butadiene block copolymer (SEBS), thermoplastic polyurethanes (TPU), polyethylene naphthalate (PEN), polyimide (PI), polyetherimide (PEI), polyethylene terephthalate (PET), or polyphenylene sulfide (PPS). The above materials have good stretchability, thereby ensuring that the first substrate 1 has good stretchability.

[0048] In some embodiments, the first substrate and the buffer structure located on the first substrate can be either a single-piece structure or a separate structure. Specifically, a single-piece structure can be understood as forming the first substrate and the buffer structure simultaneously by etching a substrate during the fabrication of the display panel. A separate structure can be understood as forming the buffer structure by depositing a first substrate 1 using a deposition process during the fabrication of the display panel. The etching and deposition processes are conventional practices in the art and will not be described in detail here.

[0049] In some embodiments, the cross-sectional size of the buffer structure 4 remains unchanged along the direction away from the first substrate 1, or the cross-sectional size of the buffer structure 4 gradually increases along the direction away from the first substrate 1.

[0050] It is worth noting that, referring to Figure 2 The buffer structure 4 is a raised structure relative to the first substrate 1, and it has a certain thickness. The thickness range is determined according to the actual needs of the display panel and is not limited here.

[0051] In one embodiment, continue to refer to Figure 2 and Figure 3The fact that the cross-sectional dimensions of the portion of the buffer structure 4 extending outward on the first substrate 1 remain unchanged can be understood as the buffer structure 4 being a straight-up-down structure. This arrangement ensures that the shear force borne by the buffer structure 4 is evenly distributed during the deformation process, reducing stress concentration caused by changes in cross-sectional dimensions, and effectively improving the stability and consistency of the buffer structure 4.

[0052] In one embodiment, the gradually increasing cross-sectional size of the portion of the buffer structure 4 extending outward on the first substrate 1 can be understood as the area of ​​the buffer structure 4 in contact with the display island 2 being larger than the area in contact with the first substrate 1. Preferably, the cross-section of the buffer structure 4 is inverted trapezoidal. This arrangement has the following beneficial effects.

[0053] First, the larger contact area between the buffer structure 4 and the display island 2 effectively disperses the stress acting on the display island 2. Second, increasing the area between the buffer structure 4 and the display island 2 improves the overall structural stability and reduces the risk of damage caused by external forces. Finally, during tension or deformation, the larger contact area helps reduce the risk of the buffer structure 4 peeling off from the display island 2, thus ensuring the stability of the display island 2.

[0054] In some embodiments, the buffer structure 4 is configured as a hollow structure. The hollow structure can effectively disperse stress, enhance structural stability, and thus improve the damage resistance of the buffer structure 4 itself, as well as reduce the risk of crack failure of the first substrate 1.

[0055] Specifically, under certain conditions, the stress is positively correlated with the thickness of the buffer structure 4; that is, the greater the thickness of the buffer structure 4, the greater the stress generated during the stretching process. By setting the buffer structure 4 as a hollow structure, not only is the overall thickness of the buffer structure 4 reduced, but the buffer structure 4 also becomes a composite structure formed by the buffer thin wall and its internal space. During the stretching process, due to the presence of air inside the buffer structure 4, the buffer structure 4 is prone to bending deformation, and the bending deformation resistance will also increase (such as the bending principle), thereby reducing the risk of cracking in the first substrate 1.

[0056] It should be noted that when reducing the thickness of the buffer structure 4, it is necessary to ensure that the buffer structure 4 supports the display island 2 when the display panel is not stretched or deformed.

[0057] In some implementations, refer to Figure 3 The display island 2 includes a display substrate 201, an encapsulation layer 203, and a display unit located between the two. The display unit includes a driving device (not shown in the figure) and a light-emitting device 202 arranged sequentially.

[0058] It should be noted that the types of the light-emitting device 202 and the driving device described above are not limited. For example, the light-emitting device 202 can be configured as an OLED (Organic Light-Emitting Diode), QLED (Quantum Dot Light-Emitting Diode), or Micro LED (Micro Light-Emitting Diode), etc. The driving device can be configured as a thin-film transistor. The material of the encapsulation layer 203 described above is not limited. For example, the material of the encapsulation layer 203 can be configured as any one of silicon nitride, silicon oxide, aluminum oxide, or silicon oxynitride.

[0059] It should also be noted that, according to common sense, the stress that causes the driving device and the light-emitting device 202 to fail is generally less than the stress and strain that causes the inorganic layer in the display island 2 to fracture. In other words, the driving device and the light-emitting device 202 are more sensitive to stress and strain.

[0060] Reference Figure 8 and Figure 9 The orthographic projection area formed by the light-emitting device 202 and the driving device on the display substrate 201 is the display area 100, and the orthographic projection of the buffer structure 4 on the display substrate 201 is the buffer area 200. The greater the distance between the buffer area 200 and the display area 100, the greater the stress-strain attenuation distance H of the buffer structure 4 on the display island 2. Therefore, the adverse effects of stretching on the driving device and the light-emitting device 202 are smaller. Thus, the buffer structure 4 can be configured such that its orthographic projection on the display substrate 201 is located outside the display area 100, and that its orthographic projection on the display substrate 201 has no overlap with the display area 100. That is, by increasing the attenuation distance H, the stress on the driving device and the light-emitting device 202 is further reduced, lowering the risk of stress-induced damage to the light-emitting device 202 and the driving device, thereby improving the stretchability of the display panel.

[0061] However, in practical applications, due to limitations imposed by the actual requirements of some display panels, the maximum distance between the buffer area 200 and the display area 100 cannot effectively attenuate stress, which can also adversely affect the light-emitting device 202 of the driving device, causing deformation and damage during the stretching process. Therefore, based on this, referring to Figure 10 The buffer structure 4 can be configured such that its orthogonal projection on the display substrate 201 partially overlaps with the display area 100, that is, the projection area of ​​the buffer structure 4 is increased within the display area 100. This configuration can effectively disperse stress and reduce local stress concentration, thereby reducing the risk of damage to the light-emitting device 202 and the driving device caused by stress.

[0062] It should be noted that determining whether the attenuation distance H is large or small requires actual testing of the display panel. This application does not impose any specific limitations on this. This application only specifies that different positional configurations of the buffer structure 4 based on the determination of the attenuation distance H can adapt to the needs of different display panels, thereby ensuring the stretchability of the display panel.

[0063] In some implementations, refer to Figures 4 to 10 At least a portion of the buffer structure 4 has a ring-shaped orthographic projection on the display island 2. This can also be understood as the outer contour of the buffer structure 4 being ring-shaped. For ease of understanding and explanation, the specific configuration of the buffer structure 4 below will be indirectly defined by the concept of its orthographic projection on the display island 2.

[0064] In one embodiment, the ring shape can be a closed ring shape. It can also be understood that the buffer structure 4 is a continuous integral structure. The ring shape can also be a non-closed ring shape, which can also be understood as the buffer structure 4 not being a continuous integral, but rather forming a ring shape by several spaced sub-buffer sections.

[0065] In one embodiment, the ring shape can be any one of a circle, rectangle, or polygon. The polygon can be a regular polygon or an irregular polygon, and there is no limitation on it.

[0066] In one embodiment, when the entire orthographic projection of the buffer structure 4 onto the display island 2 forms a ring shape, the orthographic projection of the buffer structure 4 onto the display island 2 forms a single ring shape, or multiple ring shapes arranged inside and outside. It can also be understood that the buffer structure 4 has only one ring, or the buffer structure 4 is configured as a multi-ring structure.

[0067] This application does not limit the specific configuration of the buffer structure 4. The shape, quantity, continuity, and whether a hollow structure is used to achieve the shape of the buffer structure 4 are all within the protection scope of this application. The structural configuration of the buffer structure 4 is described below by way of example.

[0068] For example, when the buffer structure 4 is a continuous whole (the ring shape is closed) and only one ring is provided (only one ring shape), the following embodiment can be obtained:

[0069] Example 1; Refer to Figure 4 In part a, the orthographic projection of the buffer structure 4 onto the first substrate 1 is a closed ring.

[0070] Example 2; Refer to Figure 4 In part b, the orthographic projection of the buffer structure 4 onto the first substrate 1 is a closed ring, and the buffer structure 4 is configured as a hollow structure.

[0071] Example 3; Refer to Figure 4 In part c, the orthographic projection of the buffer structure 4 onto the first substrate 1 is a closed rectangular ring.

[0072] For example, when the buffer structure 4 is a continuous whole (the ring shape is closed) and has multiple loops (multiple ring shapes are nested), the following embodiment can be obtained:

[0073] Example 4; Refer to Figure 5 In part a, the orthographic projection of the buffer structure 4 onto the first substrate 1 is in the form of two consecutive nested closed rings.

[0074] Example 5; Refer to Figure 5 In part b, the orthographic projection of the buffer structure 4 onto the first substrate 1 is a closed rectangular ring with two successive nested loops.

[0075] Example 6; Refer to Figure 5 In part c, the orthographic projection of the buffer structure 4 onto the first substrate 1 is two closed circular rings nested in sequence, and each circular ring is configured as a hollow structure.

[0076] Example 7; Refer to Figure 5 In the middle d part, the orthographic projection of the buffer structure 4 on the first substrate 1 is a closed rectangular ring with two consecutive nested rings, and each rectangular ring is set as a hollow structure.

[0077] For example, when the buffer structure 4 is a non-continuous whole (the ring shape is not closed) and only one ring is provided (only one ring shape), the following embodiment can be obtained:

[0078] Example 8; Refer to Figure 6 In part a, the buffer structure 4 includes four sub-buffer sections, each of which is arc-shaped and arranged at intervals around the same center, so as to form a non-closed ring shape by orthogonal projection on the first substrate 1.

[0079] Example 9; Refer to Figure 6 In part b, the buffer structure 4 includes eight spaced-apart sub-buffer sections, each of which is circular. The eight sub-buffer sections are arranged around the same center and are spaced at the same distance, so as to form a non-closed ring shape by orthographic projection on the first substrate 1.

[0080] Example 10; Refer to Figure 6 In part c, the buffer structure 4 includes four sub-buffer sections, each of which is rectangular in shape and appears as a non-closed rectangular ring when projected onto the first substrate 1.

[0081] Example 11; Refer to Figure 6In the middle d part, the buffer structure 4 includes twelve sub-buffer sections, each of which is square in shape and appears as a non-closed rectangular ring when projected onto the first substrate 1.

[0082] For example, when the buffer structure 4 is a non-continuous whole (the ring shape is not closed) and has multiple rings, the resulting embodiment is the same as the above embodiments 8 to 11, the only difference being that multiple rings are provided, which will not be elaborated here.

[0083] However, it is worth noting that in one embodiment, when the orthographic projection of a portion of the buffer structure 4 onto the display island 2 is in the shape of a ring, the buffer structure 4 includes a first buffer portion 401 located on the periphery and a second buffer portion 402 located within the first buffer portion 401. The orthographic projection of the first buffer portion 401 onto the display island 2 is in the shape of a ring or multiple rings arranged inside and outside, while the orthographic projection of the second buffer portion 402 onto the display island 2 is in the shape of a non-ring.

[0084] For example, refer to Figure 7 The first buffer portion 401 is projected onto the first substrate 1 in the form of two non-closed ring shapes (each ring shape is composed of multiple sub-buffer portions with circular projections), and the second buffer portion 402 is located in the center of the non-closed ring shape and is also circular in the form of a projection.

[0085] Furthermore, the first buffer portion 401 can also be configured as any one of a single-loop closed loop shape, a multi-loop closed loop shape, or a multi-loop closed loop shape, and both the first buffer portion 401 and the second buffer portion 402 can be configured as any one of a rectangle or a polygon in orthographic projection. No limitation is made here.

[0086] In some embodiments, the outer contour of the buffer structure 4 (or its projected shape on a certain plane) can be set in conjunction with the shape of the display island 2, that is, the outer contour of the buffer structure 4 matches the outer contour shape of the display island 2. For example, the orthographic projection of the buffer structure 4 on the display island 2 is the same as the outer contour of the display island. This setting can provide a good buffering support effect for the display island 2.

[0087] For example, when the outer contour of the island 2 is rectangular, the outer contour of the corresponding buffer structure 4 is a rectangular ring. For example, when the outer contour of the island 2 is circular, the outer contour of the corresponding buffer structure 4 is annular.

[0088] In some embodiments, the display island 2 further includes a display substrate 201 and a light-emitting device 202 located on the display substrate 201. The orthographic projection shape of the buffer structure 4 on the display island 2 matches the shape of the outer edge of the light-emitting device 202, and this arrangement can provide a good buffer support effect for the light-emitting device 202.

[0089] This can also be understood as the outer contour of the buffer structure 4 matching the outer edge shape of the light-emitting range of the light-emitting device 202. When the light-emitting side of the light-emitting device 202 and the buffer structure 4 are located on the same side, this arrangement can provide good buffer support while reducing the obstruction of light from the light-emitting device 202 by the buffer structure 4, thereby improving the display effect.

[0090] For example, the orthographic projection shape of the buffer structure 4 on the display island 2 is the same as the shape of the outer edge of the light-emitting device 202. The outer edge of the light-emitting device 202 is circular, and the outer contour of the corresponding buffer structure 4 is a circular ring. For example, when the outer edge of the light-emitting device 202 is rectangular, the outer contour of the corresponding buffer structure 4 is a rectangular ring.

[0091] In some implementations, refer to Figure 3 The display panel also includes a second substrate 3, which is located on the side of the display layer away from the first substrate 1. The second substrate 3 includes buffer structures 4 arranged in an array, and each display island 2 corresponds to at least one buffer structure 4. The orthographic projection of the display island 2 on the second substrate 3 at least partially overlaps with the orthographic projection of its corresponding buffer structure 4 on the second substrate 3.

[0092] Specifically, the material selection for the second substrate 3 is the same as that for the first substrate 1 discussed above, and will not be repeated here. Similarly, the specific details of the buffer structure 4 disposed on the second substrate 3 can be referred to the details of the buffer structure 4 disposed on the first substrate 1 discussed above, and will not be repeated here.

[0093] In some embodiments, the second substrate 3 and the buffer structure 4 located on the second substrate 3 can be integrally formed or separately formed.

[0094] In one embodiment, when the light-emitting device 202 emits light through the first substrate 1, the orthographic projection of the buffer structure 4 on the first substrate 1 onto the display substrate 201 is located outside the orthographic projection of the corresponding display unit onto the display substrate 201, and the orthographic projection of the buffer structure 4 on the first substrate 1 onto the display substrate 201 is located inside the edge of the display substrate 201.

[0095] Reference Figure 8 and Figure 9 When the first substrate 1 is used as the light-emitting surface, the orthographic projection of the buffer structure 4 on the display substrate 201 does not overlap with the display area 100. It can also be understood that the light-emitting device 202 is located within the annular distribution of the buffer structure 4, which can effectively reduce the influence of the buffer structure 4 on the light of the light-emitting device 202, thereby improving the display effect of the display panel.

[0096] Furthermore, while ensuring the display effect of the display panel, the buffer structure 4 is configured to surround the light-emitting device 202 in a plane. The buffer structure 4 is further configured to be located at the outermost edge of the display substrate 201 when projected onto the display substrate 201. This configuration can effectively increase the distance between the buffer structure 4 and the display area 100, that is, set the attenuation distance H to the maximum, so as to reduce the stress on the driving device and the light-emitting device 202, reduce the risk of damage to the light-emitting device 202 and the driving device caused by stress, and improve the stretchability of the display panel.

[0097] In one embodiment, when the light emitter emits light through the second substrate 3, the orthographic projection of the buffer structure 4 on the second substrate 3 onto the display substrate 201 is located outside the orthographic projection of the corresponding display unit onto the display substrate 201; and the orthographic projection of the buffer structure 4 on the second substrate 3 onto the display substrate 201 is located inside the edge of the display substrate 201. For details and effects, please refer to the section on the first substrate 1 as the light-emitting surface; further details will not be elaborated here.

[0098] In some implementations, refer to Figure 3 The display panel also includes an adhesive layer 5 for bonding the buffer structure 4 and the display island 2. The orthographic projection of the adhesive layer 5 on the display substrate 201 falls within the orthographic projection of the buffer structure 4 on the display substrate 201. The adhesive layer 5 includes a first adhesive layer 501 and a second adhesive layer 502. The adhesive layer 5 located between the first substrate 1 and the display island 2 is the first adhesive layer 501, and the adhesive layer 5 located between the second substrate 3 and the display island 2 is the second adhesive layer 502.

[0099] In this embodiment, the orthographic projection of the adhesive layer 5 on the display substrate 201 falling within the orthographic projection of the buffer structure 4 on the display substrate 201 can be understood as follows: the adhesive material of the first adhesive layer 501 is only provided in the area where the buffer structure 4 and the encapsulation layer 203 are bonded. Similarly, the adhesive material of the second adhesive layer 502 is only provided in the area where the buffer structure 4 and the new display substrate 201 are bonded. No adhesive material is provided between the buffer structure 4 and the display island 2, nor is adhesive material provided between the hollow area between the display islands 2 and the first substrate 1 and the second substrate 3.

[0100] In one embodiment, an adhesive layer 5 is provided over the entire bonding area between the buffer structure 4 and the display island 2. This arrangement can improve the bonding force between the first substrate 1 and the display island 2, and between the second substrate 3 and the display island 2, and prevent the buffer structure 4 and the display island 2 from peeling off due to the failure of the adhesive layer 5 during stretching.

[0101] In one embodiment, an adhesive layer 5 is provided in a portion of the bonding area between the buffer structure 4 and the display island 2. This arrangement, while ensuring the connection between the buffer structure 4 and the display island 2, further reduces the production cost of the display panel.

[0102] In one embodiment, when the light-emitting device 202 emits light through the first substrate 1, the first adhesive layer 501 is configured as an optical organic adhesive, and the second adhesive layer 502 is configured as an organic adhesive. When the light-emitting device 202 emits light through the second substrate 3, the first adhesive layer 501 is configured as an organic adhesive, and the second adhesive layer 502 is configured as an optical organic adhesive. Using optical organic adhesive on the light-emitting side of the display panel can effectively improve the display effect of the display panel.

[0103] Specifically, organic adhesives can be made from adhesive materials such as silicone, PU (polyurethane), and acrylate. Optical organic adhesives can be made from acrylic resins, silicone, etc.

[0104] In some implementations, refer to Figures 11 to 12 The display substrate 201 includes at least one flexible substrate 2010 and at least one stress barrier layer 2011, and the flexible substrate 2010 and the stress barrier layer 2011 are arranged sequentially in a direction away from the first substrate 1, wherein the Young's modulus of the stress barrier layer 2011 is greater than the Young's modulus of the flexible substrate 2010.

[0105] This configuration allows the stress barrier layer 2011 to withstand more tensile stress and the display substrate 201 to withstand less tensile stress during the stretching process. By reducing the tensile stress on the display substrate 201, the tensile stress on the light-emitting device 202 and the driving device is further reduced, thereby improving the performance of the display panel.

[0106] This application does not limit the material of the flexible substrate 2010. For example, the material of the flexible substrate 2010 is selected from at least one of polyimide, polyethylene phthalate, polyetherimide, polyethylene terephthalate, or polyphenylene sulfide.

[0107] This application does not limit the material of the stress barrier layer 2011. For example, the stress barrier layer 2011 can be configured as an inorganic layer, ceramic layer, metal layer, or organic layer with high Young's modulus and high hardness. Specifically, the material can be one of SiNx (silicon nitride), SiOx (silicon oxide), ITO (indium tin oxide), AL (aluminum), or PMMA (polymethyl methacrylate).

[0108] In some implementations, refer to Figure 11 The stress barrier layer 2011 can be integrally disposed on the flexible substrate 2010 layer. (Refer to...) Figure 12 The stress barrier layer 2011 can also be patterned after being set on the entire flexible substrate 2010 layer to form a partitioned configuration.

[0109] In one embodiment, continue to refer to Figure 12The stress barrier layer 2011 is partitioned, and the shape of the orthogonal projection of the buffer structure 4 on the flexible substrate 2010 is the same as the shape of the orthogonal projection of the stress barrier layer 2011 on the flexible substrate 2010, and the orthogonal projection of the buffer structure 4 on the flexible substrate falls within the orthogonal projection of the stress barrier layer 2011 on the flexible substrate 2010.

[0110] It should be specifically noted that the orthogonal projection of the buffer structure 4 on the flexible substrate falls within the orthogonal projection of the stress barrier layer 2011 on the flexible substrate 2010. This includes the fact that the area of ​​the orthogonal projection of the buffer structure 4 on the flexible substrate 2010 is equal to the area of ​​the orthogonal projection of the stress barrier layer 2011 on the flexible substrate 2010. Furthermore, the area of ​​the orthogonal projection of the buffer structure 4 on the flexible substrate 2010 is equal to the area of ​​the orthogonal projection of the stress barrier layer 2011 on the flexible substrate 2010.

[0111] During the fabrication of the display substrate 201, this arrangement allows the material of the flexible substrate 2010 to fill the gaps between the stress barrier layers 2011, effectively improving the flatness of the display substrate 201.

[0112] Furthermore, referring to Figure 12 When the display substrate 201 includes a plurality of flexible substrates 2010, and a stress barrier layer 2011 is provided between two adjacent flexible substrates 2010, the two adjacent flexible substrates 2010 are connected through the gap of the stress barrier layer 2011 to improve the bonding force between the layers of the flexible substrates 2010 and reduce the risk of peeling between layers.

[0113] This application also provides a display device, including a display panel as mentioned in any of the above embodiments. The specific structure and principle of the display panel are the same as those in the above embodiments, and will not be repeated here. The display device can be any product or device with display function, such as a monitor, mobile phone, television, tablet computer, etc., which will not be listed here.

[0114] The terms "first," "second," and similar terms used in this application and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one, unless otherwise specified. "A plurality" or "several" indicates two or more. The term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0115] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A display panel, characterized in that, include; The first substrate includes buffer structures arranged in an array; The display layer disposed on the first substrate includes display islands arranged in an array, and each of the display islands corresponds to at least one of the buffer structures; The orthographic projection of the display island on the first substrate at least partially overlaps with the orthographic projection of its corresponding buffer structure on the first substrate.

2. The display panel according to claim 1, characterized in that, The cross-sectional dimensions of the buffer structure remain unchanged along the direction away from the first substrate, or the cross-sectional dimensions of the buffer structure gradually increase along the direction away from the first substrate.

3. The display panel according to claim 2, characterized in that, The buffer structure is configured as a hollow structure.

4. The display panel according to claim 2, characterized in that, At least a portion of the buffer structure has a ring shape in its orthographic projection onto the display island.

5. The display panel according to claim 4, characterized in that, When the entire orthographic projection of the buffer structure onto the display island is in a ring shape, the orthographic projection of the buffer structure onto the display island is in a ring shape, or multiple ring shapes arranged inside and outside. When a portion of the buffer structure is projected in a ring shape on the display island, the buffer structure includes a first buffer portion located on the periphery and a second buffer portion located within the first buffer portion. The first buffer portion is projected in a ring shape or multiple ring shapes arranged inside and outside the display island, and the second buffer portion is projected in a non-ring shape on the display island.

6. The display panel according to claim 4, characterized in that, The rings are all any one of the following shapes: circle, rectangle, or polygon.

7. The display panel according to claim 4, characterized in that, The ring shape includes closed rings and non-closed rings.

8. The display panel according to any one of claims 1-7, characterized in that, The display island also includes a display substrate and a light-emitting device located on the display substrate; the orthographic projection shape of the buffer structure on the display island matches the shape of the outer edge of the light-emitting device.

9. The display panel according to any one of claims 1-7, characterized in that, The display panel further includes a second substrate located on the side of the display layer away from the first substrate. The second substrate includes the buffer structures arranged in an array, and each display island corresponds to at least one of the buffer structures. The orthographic projection of the display island on the second substrate at least partially overlaps with the orthographic projection of its corresponding buffer structure on the second substrate.

10. The display panel according to claim 9, characterized in that, The display island also includes a display substrate, an encapsulation layer, and a display unit located between the two. The display unit includes a driving device and a light-emitting device arranged sequentially. When the light-emitting device emits light through the first substrate, the orthographic projection of the buffer structure on the first substrate onto the display substrate is located outside the orthographic projection of the corresponding display unit onto the display substrate, and the orthographic projection of the buffer structure on the first substrate onto the display substrate is located inside the edge of the display substrate. When the light emitter emits light through the second substrate, the orthographic projection of the buffer structure on the second substrate onto the display substrate is located outside the orthographic projection of the corresponding display unit onto the display substrate; and the orthographic projection of the buffer structure on the second substrate onto the display substrate is located inside the edge of the display substrate.

11. The display panel according to claim 10, characterized in that, The display panel further includes an adhesive layer for bonding the buffer structure and the display island, wherein the orthographic projection of the adhesive layer on the display substrate falls within the orthographic projection of the buffer structure on the display substrate; wherein The adhesive layer includes a first adhesive layer and a second adhesive layer. The adhesive layer located between the first substrate and the display island is the first adhesive layer, and the adhesive layer located between the second substrate and the display island is the second adhesive layer. When the light-emitting device emits light through the first substrate, the first adhesive layer is configured as an optical organic adhesive, and the second adhesive layer is configured as an organic adhesive; When the light-emitting device emits light through the second substrate, the first adhesive layer is configured as an organic adhesive, and the second adhesive layer is configured as an optical organic adhesive.

12. The display panel according to claim 10, characterized in that, The display substrate includes at least one flexible substrate and at least one stress-barrier layer, wherein the flexible substrate and the stress-barrier layer are arranged sequentially in a direction away from the first substrate. The Young's modulus of the stress barrier layer is greater than that of the flexible substrate.

13. The display panel according to claim 12, characterized in that, The shape of the orthographic projection of the buffer structure on the flexible substrate is the same as the shape of the orthographic projection of the stress barrier layer on the flexible substrate, and the orthographic projection of the buffer structure on the flexible substrate falls within the orthographic projection of the stress barrier layer on the flexible substrate.

14. The display panel according to claim 9, characterized in that, The first substrate and the buffer structure are an integral structure, and / or the second substrate and the buffer structure are an integral structure.

15. A display device, characterized in that, Includes the display panel as described in any one of claims 1-14.

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