Display panel and display device

Abstract

The utility model relates to a display panel and a display device. The display panel comprises a first substrate and a display layer. Wherein the first substrate comprises buffer structures arranged in an array mode, the display layer comprises display islands arranged in an array mode, each display island at least corresponds to one buffer structure, and the orthographic projection of each display island on the first substrate is at least partially overlapped with the orthographic projection of the corresponding buffer structure on the first substrate. The buffer structure is additionally arranged between the display island and the first substrate, the stress strain generated by the first substrate and the display island during shearing motion can be effectively absorbed and relieved, the damage of the stress strain to each film layer in the display island is reduced by reducing the transmission of the stress strain to the display island, and the display quality is improved. And the display performance of the display device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display devices, in particular to a display panel and a display device. BACKGROUND

[0002] Currently, flexible display devices with bending and foldable are being actively developed, and further, stretchable display devices that can change shape are also the future development direction of display technology.

[0003] The current stretchable display device is composed of a display island, a connecting bridge and a hollow part. In general, the elastic substrate (Top Film / Bottom Film) and the display substrate in the display device are bonded by organic glue material. During the stretching process, the glue material and the elastic substrate under the display substrate will shear with the display substrate, and the interaction force will cause the stress and strain of the display island to increase. The greater the Young's modulus of the glue material and the elastic substrate, the greater the stress and strain of the display island, thereby causing irreversible deformation and damage to the inorganic layer, organic layer, substrate and circuit used for packaging in the display island, affecting the performance of the display device. SUMMARY

[0004] The present application provides a display panel which can effectively solve the problem of easy failure of the performance of each film layer in the display island. A display panel comprises:

[0005] A first substrate comprising a plurality of buffer structures arranged in an array;

[0006] A display layer disposed on the first substrate, comprising a plurality of display islands arranged in an array, and each display island corresponding to at least one buffer structure;

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

[0008] In one embodiment, the cross-sectional dimension of the buffer structure does not change in the direction away from the first substrate, or the cross-sectional dimension of the buffer structure gradually increases in the direction away from the first substrate.

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

[0010] In one embodiment, the orthographic projection of at least part of the buffer structure on the display island is in the shape of a ring.

[0011] In one embodiment, when the orthographic projection of all the buffer structures on the display island is in the shape of a ring, the orthographic projection of the buffer structure on the display island is in the shape of a ring, or a plurality of rings are nested.

[0012] In a case where a projection of the buffer structure on the display island is in a ring shape, the buffer structure comprises a first buffer portion located at an outer periphery, and a second buffer portion located inside the first buffer portion, wherein the first buffer portion is in a ring shape or a plurality of ring shapes nested inside or outside each other, and the second buffer portion is in a non-ring shape.

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

[0014] In one of the embodiments, the ring shape comprises a closed ring shape and a non-closed ring shape.

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

[0016] In one of the embodiments, the display panel further comprises a second substrate located on a side of the display layer away from the first substrate, the second substrate comprises the buffer structure arranged in an array, and each of the display islands corresponds to at least one of the buffer structures.

[0017] A projection of the display island on the second substrate at least partially overlaps a projection of the corresponding buffer structure on the second substrate.

[0018] In one of the embodiments, the display island further comprises a display substrate, a packaging layer, and a display unit located between the display substrate and the packaging layer, the display unit comprises a driving device and a light emitting device arranged in sequence.

[0019] When the light emitting device emits light via the first substrate, a projection of the buffer structure on the first substrate on the display substrate is located at an outer periphery of a projection of the corresponding display unit on the display substrate, and the projection of the buffer structure on the first substrate on the display substrate is located inside an edge of the display substrate.

[0020] When the light emitting device emits light via the second substrate, a projection of the buffer structure on the second substrate on the display substrate is located at an outer periphery of a projection of the corresponding display unit on the display substrate, and the projection of the buffer structure on the second substrate on the display substrate is located inside an edge of the display substrate.

[0021] In one of the embodiments, the display panel further comprises an adhesive layer bonding the buffer structure and the display island, a normal projection of the adhesive layer on the display substrate falls within a normal projection of the buffer structure on the display substrate; wherein

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

[0023] When the light emitting device emits light via 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 via 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 of the embodiments, the display substrate comprises at least one flexible substrate and at least one stress barrier layer, and the flexible substrate and the stress barrier layer are arranged in sequence in a direction away from the first substrate, wherein,

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

[0027] In one of the embodiments, a normal projection of the buffer structure on the flexible substrate has the same shape as a normal projection of the stress barrier layer on the flexible substrate, and the normal projection of the buffer structure on the flexible substrate falls within the normal projection of the stress barrier layer on the flexible substrate.

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

[0029] The application further provides a display device comprising the display panel as mentioned in any one of the above embodiments.

[0030] The technical scheme provided by the embodiments of the application can have the following beneficial effects:

[0031] It can be known from the above embodiment that the display panel provided in the application 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, and 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 buffer structure arranged between the display island and the first substrate can effectively absorb and relieve the stress and strain generated by the first substrate and the display island in shearing motion, reduce the transmission of stress and strain to the display island, reduce the damage of stress and strain to each film layer in the display island, and thus improve the display performance of the display device.

[0032] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0034] Figure 1 The structure schematic diagram of the display panel provided in an embodiment of the application under a viewing angle is shown.

[0035] Figure 2 The structure schematic diagram of a first substrate and a buffer structure provided in an embodiment of the application under a viewing angle is shown.

[0036] Figure 3 The structure schematic diagram of a display panel provided in an embodiment of the application under a viewing angle is shown.

[0037] Figures 4-7 The schematic diagram of the orthographic projection of the buffer structure on the first substrate in an embodiment of the application is shown.

[0038] Figures 8-10 The structure schematic diagram of a display island provided in an embodiment of the application under a viewing angle is shown.

[0039] Figures 11-12 The structure schematic diagram of a display panel provided in an embodiment of the application under a viewing angle is shown.

[0040] Reference signs:

[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 part; 402, second buffer part; 5, adhesive layer; 501, first adhesive layer; 502, second adhesive layer; 100, display area; 200, buffer area; H, attenuation distance. DETAILED DESCRIPTION

[0042] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, unless otherwise indicated, like numbers in the different drawings represent similar or identical elements. The following exemplary embodiments described are not meant to represent all aspects of the present application. Rather, they are merely examples of apparatuses consistent with some aspects of the present application as detailed in the appended claims.

[0043] As described in the background section, most of the flexible stretchable display apparatuses are connected by display islands and connecting bridges, and by setting a hollow area between the islands and bridges, a certain stretchability can be achieved, and after the applied force disappears, the display apparatus 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", a thin film transistor (not shown in the figure), and a light emitting device 4". The elastic substrate 1" in the display apparatus is integrally attached to the display substrate 3" by the adhesive 2". During the stretching process, the adhesive 2" and the elastic substrate 1" below the display substrate 3" will shear with the display substrate 3", and the interaction force will cause the stress and strain of the display island to increase. The thin film transistor, the light emitting device 4", and the encapsulation film layer 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 performance of the overall display apparatus.

[0045] Based on this, the present application provides a display panel, which includes a first substrate and a display layer located on the first substrate. The first substrate includes a buffer structure arranged in an array. The display layer includes a display island arranged in an array. Each display island corresponds to at least one buffer structure, and the orthogonal projection of the display island on the first substrate at least partially overlaps the orthogonal projection of the corresponding buffer structure on the first substrate 1.

[0046] The present application sets a buffer structure between the display island and the first substrate (which can also be understood as the above-mentioned elastic substrate), so that during the stretching process of the display panel, it can absorb or release most of the shear force by itself deformation, reduce the force acting on the display island during the stretching process, and further reduce the stress and strain between the first substrate and the display island, so as to reduce the damage to the film layer in the display island and improve the performance of the display panel.

[0047] Some embodiments of the present application do not limit the material of the first lining 1. For example, the material of the first substrate is selected from at least one of polydimethylsiloxane (PDMS), natural rubber, nitrile rubber, hydrogenated styrene-butadiene block copolymer (SEBS), thermoplastic polyurethanes (TPU), polyethylene naphthalate (PEN), polyimide (PI), polyetherimide (PEI), polyethylene terephthalate (PET), or polyphenylene sulfide (PPS). Each of the above materials has good elasticity, thereby ensuring that the first substrate 1 has good elasticity.

[0048] In some embodiments, the first substrate and the buffer structure located on the first substrate can be an integrally formed structure or a split-formed structure. Specifically, the integrally formed structure can be understood as etching a substrate through an etching process during the preparation of the display panel to simultaneously form the first substrate and the buffer structure. The split-formed structure can be understood as first providing a first substrate during the preparation of the display panel, and then depositing on the first substrate 1 through a deposition process to form the buffer structure. The etching process and the deposition process are conventional operations in the art and are not described in detail here.

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

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

[0051] In one embodiment, referring to Figure 2 and Figure 3The constant cross-sectional dimension of the outwardly extending portion of the buffer structure 4 on the first substrate 1 can be understood as a straight-up and straight-down structure. Such a configuration makes the distribution of the shear force borne by the buffer structure 4 uniform during the deformation process, reduces stress concentration caused by the change in cross-sectional dimension, and effectively improves the stability and consistency of the buffer structure 4.

[0052] In one embodiment, the gradually increasing cross-sectional dimension of the outwardly extending portion of the buffer structure 4 on the first substrate 1 can be understood as the area of the buffer structure 4 in contact with the display island 2 being greater than the area in contact with the first substrate 1. Preferably, the cross-section of the buffer structure 4 is in the shape of an inverted trapezoid. Such a configuration has the following beneficial effects.

[0053] First, the larger contact area between the buffer structure 4 and the display island 2 can effectively disperse the stress acting on the display island 2. Second, increasing the area between the buffer structure 4 and the display island 2 can improve the overall structural stability and reduce the risk of damage caused by external forces. Finally, during the stretching or deformation process, the larger contact area helps to reduce the risk of peeling of the buffer structure 4 relative to the display island 2, thereby 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 and reduce the risk of crack failure of the first substrate 1.

[0055] Specifically, in some specific cases, the stress is positively correlated with the thickness of the buffer structure 4, i.e., the greater the thickness of the buffer structure 4, the greater the stress generated during the stretching process. By configuring the buffer structure 4 as a hollow structure, not only the overall thickness of the buffer structure 4 is reduced, but also the buffer structure 4 becomes a composite structure formed by the buffer thin wall and the internal space. During the stretching process, due to the presence of air in the buffer structure 4, the buffer structure 4 is prone to bending deformation, and the bending deformation resistance is also increased (e.g., bending principle), thereby reducing the risk of cracks 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 can support the display island 2 when the display panel is not stretched or deformed.

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

[0058] It needs to be particularly pointed out that the above-mentioned light-emitting device 202 and the type of driving device are not limited. Illustratively, the light-emitting device 202 can be configured as an OLED (Organic Light-Emitting Diode), a QLED (Quantum Dot Light-Emitting Diode), or a Micro LED (Micro Light Emitting Diode) light-emitting device. The driving device can be configured as a thin film transistor. The material of the above-mentioned encapsulation layer 203 is not limited. Illustratively, 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 also needs to be particularly pointed out 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 strain that causes the inorganic layer in the display island 2 to break, that is, the driving device and the light-emitting device 202 are more sensitive to stress strain.

[0060] Referring to Figure 8 and Figure 9 , the orthographic projection area of the light-emitting device 202 and the driving device formed 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. Wherein, the greater the distance between the buffer area 200 and the display area 100 means that the attenuation distance H of the stress strain generated by the buffer structure 4 to the display island 2 is greater, and then the adverse effects of stretching on the driving device and the light-emitting device 202 are smaller, so the buffer structure 4 can be set as the orthographic projection on the display substrate 201 is located at the periphery of the display area 100, and the orthographic projection of the buffer structure 4 on the display substrate 201 has no overlapping part 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, and the damage risk of the light-emitting device 202 and the driving device caused by stress is reduced, so as to improve the stretchable effect of the display panel.

[0061] However, in actual application process, based on some limitations of actual needs of display panel, the maximum distance between the buffer area 200 and the display area 100 cannot effectively attenuate the stress, and also has adverse effects on the driving device and the light-emitting device 202, causing deformation and damage in the stretching process. Therefore, on this basis, referring to Figure 10 , the buffer structure 4 can be set as the orthographic 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 in the display area 100, and this kind of setting can effectively disperse stress and reduce local stress concentration, thereby reducing the damage risk of the light-emitting device 202 and the driving device caused by stress.

[0062] It should be particularly noted that determining whether the attenuation distance H is large or small needs to be determined through actual testing of the display panel. The present application does not make a separate limitation. The present application only limits that different position configurations of the buffer structure 4 according to the determination of the attenuation distance H can adapt to the needs of different display panels to ensure the stretchable effect of the display panel.

[0063] In some embodiments, with reference to Figures 4 to 10 , at least part of the orthographic projection of the buffer structure 4 on the display island 2 is in a ring shape. It can also be understood that the peripheral contour of the buffer structure 4 is in a ring shape. For the convenience of understanding and description, the specific settings of the buffer structure 4 in the following are indirectly limited through the concept of the orthographic projection of the buffer structure 4 on the display island 2.

[0064] In an embodiment, the ring shape can be a closed ring shape. It can also be understood that the buffer structure 4 is a continuous whole structure. The ring shape can also be a non-closed ring shape, and it can also be understood that the buffer structure 4 is not a continuous whole, but is collectively surrounded or formed into a ring shape by a plurality of spaced sub-buffer portions.

[0065] In an embodiment, the ring shape is any one of a circle, a rectangle, or a polygon. The polygon can be a regular polygon or an irregular polygon, which is not limited herein.

[0066] In an embodiment, when the orthographic projection of the buffer structure 4 on the display island 2 is in a ring shape, the orthographic projection of the buffer structure 4 on the display island 2 is in one ring shape or a plurality of ring shapes which are nested. It can also be understood that the buffer structure 4 is provided with only one ring, or the buffer structure 4 is provided as a multi-ring structure.

[0067] The present application does not limit the specific settings of the buffer structure 4, and the shape of the buffer structure 4 obtained by cooperating the specific shape, number, continuity, and hollow structure of the ring shape are all within the protection scope of the present application. The structural settings of the buffer structure 4 are exemplarily described below.

[0068] Exemplarily, when the buffer structure 4 is a continuous whole (the ring shape is in a closed shape) and is provided with only one ring (only one ring shape), the following embodiments can be obtained:

[0069] Embodiment 1; with reference to Figure 4 Part a, the orthographic projection of the buffer structure 4 on the first substrate 1 is in a closed circular ring shape.

[0070] Embodiment 2; with reference to Figure 4 Part b, the orthographic projection of the buffer structure 4 on the first substrate 1 is in a closed circular ring shape, and the buffer structure 4 is provided as a hollow structure.

[0071] Embodiment 3; refer to Figure 4 In the c part, the orthographic projection of the buffer structure 4 on the first substrate 1 is a closed rectangular ring shape.

[0072] Exemplarily, when the buffer structure 4 is a continuous whole (the ring shape is closed), and is provided with multiple rings (multiple ring shapes are nested), the following embodiments can be obtained:

[0073] Embodiment 4; refer to Figure 5 In the a part, the orthographic projection of the buffer structure 4 on the first substrate 1 is a closed circular ring shape nested in two rings.

[0074] Embodiment 5; refer to Figure 5 In the b part, the orthographic projection of the buffer structure 4 on the first substrate 1 is a closed rectangular ring shape nested in two rings.

[0075] Embodiment 6; refer to Figure 5 In the c part, the orthographic projection of the buffer structure 4 on the first substrate 1 is a closed circular ring shape nested in two rings, and each circular ring is provided as a hollow structure.

[0076] Embodiment 7; refer to Figure 5 In the d part, the orthographic projection of the buffer structure 4 on the first substrate 1 is a closed rectangular ring shape nested in two rings, and each rectangular ring is provided as a hollow structure.

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

[0078] Embodiment 8; refer to Figure 6 In the a part, the buffer structure 4 includes four sub-buffer parts, each sub-buffer part is in an arc shape, and the sub-buffer parts are arranged at intervals around the same center to form a non-closed circular ring shape in the orthographic projection on the first substrate 1.

[0079] Embodiment 9; refer to Figure 6 In the b part, the buffer structure 4 includes eight sub-buffer parts arranged at intervals, each buffer part is in a circular shape, the eight sub-buffer parts are arranged at intervals around the same center with the same interval, to form a non-closed circular ring shape in the orthographic projection on the first substrate 1.

[0080] Embodiment 10; refer to Figure 6 In the c part, the buffer structure 4 includes four sub-buffer parts, each sub-buffer part is in a rectangular shape, to form a non-closed rectangular ring shape in the orthographic projection on the first substrate 1.

[0081] Embodiment 11; refer to Figure 6In the middle D part, the buffer structure 4 includes twelve sub-buffer parts, each of which is square-shaped, so as to form a non-closed rectangular ring shape in the orthographic projection on the first substrate 1.

[0082] Exemplarily, when the buffer structure 4 is a non-continuous whole (the ring shape is non-closed), and is provided with multiple rings, the obtained embodiment is the same as the above-mentioned embodiment 8 to embodiment 11, and the difference is only that multiple rings are provided, which will not be described here.

[0083] However, it is worth noting that, in an embodiment, when the orthographic projection of a part of the buffer structure 4 on the display island 2 is in a ring shape, the buffer structure 4 includes a first buffer part 401 located at the periphery, and a second buffer part 402 located in the first buffer part 401, wherein the orthographic projection of the first buffer part 401 on the display island 2 is in a ring shape or multiple ring shapes nested inside and outside, and the orthographic projection of the second buffer part 402 on the display island 2 is in a non-ring shape.

[0084] Exemplarily, referring to Figure 7 , the orthographic projection of the first buffer part 401 on the first substrate 1 is in two non-closed ring shapes nested inside and outside (each ring shape is composed of multiple sub-buffer parts with circular orthographic projection), and the second buffer part 402 is in the middle of the non-closed ring shape and is provided in a circular orthographic projection.

[0085] Further, the first buffer part 401 can also be configured as any one of a single closed ring shape, multiple closed ring shapes, multiple closed ring shapes, etc., and the first buffer part 401 and the second buffer part 402 can both be provided in any one of a rectangular orthographic projection, a polygonal orthographic projection, etc. Here, no limitation is made.

[0086] In some embodiments, the peripheral contour of the buffer structure 4 (or its projection shape on a certain plane) can be set in combination with the shape of the display island 2, that is, the peripheral contour of the buffer structure 4 matches the peripheral 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 peripheral contour of the display island, and such a setting can well provide buffer support effect for the display island 2.

[0087] Exemplarily, when the peripheral contour shape of the display island 2 is rectangular, the peripheral contour of the corresponding buffer structure 4 is a rectangular ring. Exemplarily, when the peripheral contour shape of the display island 2 is circular, the peripheral contour of the corresponding buffer structure 4 is a circular ring.

[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 such a setting can well provide buffer support effect for the light emitting device 202.

[0089] It can also be understood that the peripheral contour of the buffer structure 4 is matched with the shape of the outer edge of the light emitting range of the light emitting device 202. When the light emitting side of the light emitting device 202 is on the same side as the buffer structure 4, such a setting can well provide buffer support while reducing the blocking of the light of the light emitting device 202 by the buffer structure 4, so as to improve the display effect.

[0090] Exemplarily, the shape of the orthographic projection 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 peripheral contour of the corresponding buffer structure 4 is a circular ring. Exemplarily, when the shape of the outer edge of the light emitting device 202 is rectangular, the peripheral contour of the corresponding buffer structure 4 is a rectangular ring.

[0091] In some embodiments, referring to Figure 3 , the display panel further comprises a second substrate 3 located on the side of the display layer away from the first substrate 1, the second substrate 3 comprises 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 the corresponding buffer structure 4 on the second substrate 3.

[0092] Specifically, the material of the second substrate 3 is selected from the same range as the material of the first substrate 1 discussed above, and will not be repeated here. Similarly, the specific content of the buffer structure 4 provided on the second substrate 3 can refer to the content of the buffer structure 4 provided on the first substrate 1 described above, and will not be repeated here.

[0093] In some embodiments, the second substrate 3 and the buffer structure 4 on the second substrate 3 can be an integral structure, or can be a separate structure.

[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 on the display substrate 201 is located on the periphery of the orthographic projection of the corresponding display unit on the display substrate 201, and the orthographic projection of the buffer structure 4 on the first substrate 1 on the display substrate 201 is located inside the edge of the display substrate 201.

[0095] Referring to Figure 8 and Figure 9 , when the first substrate 1 serves as a light emitting surface, the orthographic projection of the buffer structure 4 on the display substrate 201 does not overlap with the display area 100, and 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, and further improve the display effect of the display panel.

[0096] Further, on the basis of ensuring the display effect of the display panel, that is, on the basis of arranging the buffer structure 4 to surround the light-emitting device 202 arranged in a plane, the buffer structure 4 is further arranged to be located at the edge of the display substrate 201 in orthographic projection, which can effectively increase the distance between the buffer structure 4 and the display area 100, that is, the attenuation distance H is arranged to be maximum, so as to reduce the stress suffered by the driving device and the light-emitting device 202 and reduce the damage risk of the light-emitting device 202 and the driving device caused by the stress, thereby improving the stretchable effect of the display panel.

[0097] In one embodiment, when the light-emitting device emits light via the second substrate 3, the orthographic projection of the buffer structure 4 on the second substrate 3 on the display substrate 201 is located at the periphery of the orthographic projection of the display unit corresponding thereto on the display substrate 201; and the orthographic projection of the buffer structure 4 on the second substrate 3 on the display substrate 201 is located inside the edge of the display substrate 201. The specific content and effect can be referred to the content of the first substrate 1 as the light-emitting surface, which will not be described here in detail.

[0098] In some embodiments, referring to Figure 3 , the display panel further comprises an adhesive layer 5 bonding the buffer structure 4 and the display island 2, and 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 comprises a first adhesive layer 501 and a second adhesive layer 502, the adhesive layer 5 between the first substrate 1 and the display island 2 is the first adhesive layer 501, and the adhesive layer 5 between the second substrate 3 and the display island 2 is the second adhesive layer 502.

[0099] In the present 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 that the adhesive material of the first adhesive layer 501 is only arranged in the region where the buffer structure 4 is attached to the encapsulation layer 203, and similarly, the adhesive material of the second adhesive layer 502 is only arranged in the region where the buffer structure 4 is attached to the new display substrate 201. No adhesive material is arranged between the buffer structure 4 and the display island 2, and no adhesive material is arranged between the hollowed-out regions between the display islands 2 and the first substrate 1 and the second substrate 3.

[0100] In one embodiment, the adhesive layer 5 is arranged in all the attached regions between the buffer structure 4 and the display island 2. Such an 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, so as to avoid the peeling phenomenon of the buffer structure 4 and the display island 2 due to the failure of the adhesive layer 5 in the stretching process.

[0101] In one embodiment, the adhesive layer 5 is arranged in part of the attached regions between the buffer structure 4 and the display island 2. Such an arrangement can further reduce the production cost of the display panel on the basis of ensuring the connection of the buffer structure 4 and the display island 2.

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

[0103] Specifically, the material of the organic glue can be selected from adhesive materials such as silicone, PU (polyurethane), and acrylate. The material of the optical organic glue can be selected from acrylate and silicone.

[0104] In some embodiments, referring 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 in sequence 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] Such a configuration can enable the stress barrier layer 2011 to bear more tensile stress and the display substrate 201 to bear less tensile stress during stretching. By reducing the tensile stress borne by the display substrate 201, the tensile stress borne by the light emitting device 202 and the driving device is further reduced, thereby improving the performance of the display panel.

[0106] The present 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 terephthalate, polyetherimide, polyethylene terephthalate, or polyphenylene sulfide.

[0107] The present 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, a ceramic layer, a metal layer, or an organic layer with high Young's modulus and high hardness. Specifically, the material can be selected from one of SiNx (silicon nitride), SiOx (silicon oxide), ITO (indium tin oxide), AL (aluminum), or PMMA (polymethyl methacrylate).

[0108] In some embodiments, referring to Figure 11 , the stress barrier layer 2011 can be provided on the flexible substrate 2010 layer in a whole layer. Referring to Figure 12 , the stress barrier layer 2011 can also be provided on the flexible substrate 2010 layer in a whole layer and then patterned to form a partitioned configuration.

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

[0110] It should be particularly noted that the orthographic projection of the buffer structure 4 on the flexible substrate falls within the orthographic projection of the stress barrier layer 2011 on the flexible substrate 2010, including that the area of the orthographic projection of the buffer structure 4 on the flexible substrate 2010 is equal to the area of the orthographic projection of the stress barrier layer 2011 on the flexible substrate 2010. Also including that the area of the orthographic projection of the buffer structure 4 on the flexible substrate 2010 is equal to the area of the orthographic projection of the stress barrier layer 2011 on the flexible substrate 2010.

[0111] In the preparation process of the display substrate 201, such arrangement enables the material of the flexible substrate 2010 to fill the gap between the stress barrier layers 2011, which can effectively improve the flatness of the display substrate 201.

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

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

[0114] The terms "first", "second", and similar terms used in the specification and claims of the present application do not indicate any order, number, or importance, but are only used to distinguish different components. Similarly, the terms "one" or "a" and the like do not indicate a quantity limitation, but indicate the existence of at least one, and if only "one" is referred to, it will be separately stated. "Multiple" or "several" means two or more. The term "and / or" used in the present application means any or all possible combinations of one or more associated listed items.

[0115] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described, however, any combination of the technical features is considered to be within the scope of the present specification.

Claims

1. A display panel, characterized in that: include; A first substrate comprising buffer structures arranged in an array; A 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 the corresponding buffer structure on the first substrate.

2. The display panel according to claim 1, wherein: The cross-sectional size of the buffer structure remains unchanged in a direction away from the first substrate, or the cross-sectional size of the buffer structure gradually increases in a direction away from the first substrate.

3. The display panel according to claim 2, wherein: The buffer structure is configured as a hollow structure.

4. The display panel according to claim 2, wherein: An orthographic projection of at least a portion of the buffer structure on the display island is in a ring shape.

5. The display panel according to claim 4, wherein: When the orthographic projections of the entire buffer structure on the display island are in a ring shape, the orthographic projections of the buffer structure on the display island are in a single ring shape, or in a plurality of ring shapes disposed inside and outside the display island; When the orthographic projection of a portion of the buffer structure on the display island is in a ring shape, the buffer structure includes a first buffer portion located on the periphery, and a second buffer portion located inside the first buffer portion, wherein the orthographic projection of the first buffer portion on the display island is in a ring shape or multiple ring shapes arranged inside and outside, and the orthographic projection of the second buffer portion on the display island is in a non-annular shape.

6. The display panel according to claim 4, wherein: The ring shape is any one of a circle, a rectangle and a polygon.

7. The display panel according to claim 4, wherein: The ring shape includes a closed ring shape and a non-closed ring shape.

8. The display panel according to any one of claims 1 to 7, wherein: 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.

9. The display panel according to any one of claims 1 to 7, wherein: The display panel further includes a second substrate, the second substrate being located on a 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 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 the corresponding buffer structure on the second substrate.

10. The display panel according to claim 9, wherein: The display island further comprises a display substrate, an encapsulation layer and a display unit located therebetween, wherein the display unit comprises a driving device and a light-emitting device arranged in sequence; When the light-emitting device emits light through the first substrate, the orthographic projection of the buffer structure on the first substrate on the display substrate is located outside the orthographic projection of the corresponding display unit on the display substrate, and the orthographic projection of the buffer structure on the first substrate on 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 on the display substrate is located outside the orthographic projection of the corresponding display unit on the display substrate; and the orthographic projection of the buffer structure on the second substrate on the display substrate is located inside the edge of the display substrate.

11. The display panel according to claim 10, wherein: 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; 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 organic adhesive, and the second adhesive layer is configured as optical organic adhesive.

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

13. The display panel according to claim 12, wherein: The orthographic projection of the buffer structure on the flexible substrate has the same shape as the orthographic projection of the stress barrier layer on the flexible substrate, and the orthographic projection of the buffer structure on the flexible liner falls within the orthographic projection of the stress barrier layer on the flexible substrate.

14. The display panel according to claim 9, wherein: The first substrate and the buffer structure are an integrated structure, and / or the second substrate and the buffer structure are an integrated structure.

15. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 14.

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