Stretching display panel and display device

Abstract

The invention provides a stretched display panel. The stretching display panel comprises a plurality of pixel islands which are arranged at intervals, and each pixel island comprises a substrate, a display layer arranged on one side of the substrate, a plurality of blocking dams and a first packaging layer. The multiple blocking dams are located on the substrate and distributed on the pixel islands, at least two blocking dams are distributed on each pixel island, and on each pixel island, the at least two blocking dams are sequentially arranged around the display layer from inside to outside. The first packaging layer is located on the side, away from the substrate, of the display layer and the blocking dam and covers the display layer and the blocking dam. In the stretching display panel with the structure, at least two blocking dams are distributed on each pixel island, so that the packaging strength between the first packaging layer and the pixel island is increased, and the risk of display failure of the stretching display panel is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular, to a stretched display panel and a display device. Background Art

[0002] Organic Light-Emitting Diode (OLED) display panels have gradually become one of the mainstreams in the display field due to their excellent performance such as low power consumption, high color saturation, wide viewing angle, thin thickness, and flexibility. In addition, with the development of flexible display technology, OLED display panels have gradually transitioned from bendable and foldable to stretchable. Stretchable OLED display panels, or stretchable display panels, are widely used in terminal products such as smartphones, tablets, and TVs because they can meet the needs of various display forms, and have gradually become a hot spot in the OLED display field.

[0003] However, in some stretched display panels, there is a phenomenon that the stretched display unit is prone to packaging failure. Summary of the invention

[0004] The present disclosure provides a stretched display panel and a display device. At least two blocking dams are distributed on each pixel island of the stretched display panel. The at least two blocking dams increase the contact area between the encapsulation layer and each pixel island, thereby increasing the encapsulation adhesion, thereby improving the problem of easy encapsulation failure in the stretched display unit.

[0005] In a first aspect, the present disclosure provides a stretched display panel. The stretched display panel includes a plurality of pixel islands spaced apart from each other, each pixel island includes a substrate and a display layer, a first encapsulation layer, and a plurality of barrier dams located on the substrate. The barrier dams are located on the substrate and distributed on the pixel islands, at least two barrier dams are distributed on each pixel island, and on each pixel island, at least two barrier dams are arranged in sequence from the inside to the outside around the display layer, and the first encapsulation layer is located on the side of the display layer and the barrier dam away from the substrate, and covers the display layer and the barrier dam.

[0006] In the above solution, at least two barrier dams are distributed on each pixel island, which increases the encapsulation strength between the first encapsulation layer and the pixel island, thereby reducing the risk of display failure of the stretched display panel.

[0007] In a specific embodiment of the first aspect of the present disclosure, on each pixel island, the barrier dam is classified into a first type of barrier dam and a second type of barrier dam, the second type of barrier dam is located between the first type of barrier dam and the display layer, and the first type of barrier dam is a closed ring, and the second type of barrier dam includes a plurality of sub-barrier dams arranged at intervals. For example, further, there are a plurality of second type of barrier dams, and at least one second type of barrier dam is a closed ring. For example, further, the cross-section of the barrier dam in a direction perpendicular to the substrate is a trapezoid. For example, further, the cross-section of the barrier dam in a direction perpendicular to the substrate is an inverted trapezoid.

[0008] In the above solution, the second type barrier composed of multiple discontinuous sub-blocking dams contacts the first encapsulation layer, and the adhesion between the film layers is increased by increasing the contact area between the two, thereby further reducing the risk of display failure of the stretched display panel.

[0009] In a specific embodiment of the first aspect of the present disclosure, at least two adjacent and spaced second-type barrier dams are arranged on each pixel island, and the sub-barrier dams of the second-type barrier dams are arranged in a staggered manner with the sub-barrier dams of the adjacent second-type barrier dams. For example, further, the second-type barrier dams include a first second-type barrier dam and a second second-type barrier dam, and the first second-type barrier dam is closer to the display layer than the second second-type barrier dam, and the sub-barrier dams of the first second-type barrier dams are arranged in a staggered manner with the sub-barrier dams of the second second-type barrier dams.

[0010] In the above solution, the staggered sub-barrier dams in the second type of barrier dams can increase the adhesion with the first encapsulation layer while reducing the risk of cracks extending to the display layer when cracks are generated at the edge of the pixel island.

[0011] In a specific embodiment of the first aspect of the present disclosure, at least one sub-dam has a straight line segment shape; and / or at least one sub-dam has a broken line segment shape; and / or at least one sub-dam has a curved line shape. For example, the curved line shape includes any one of a sawtooth shape and a wavy shape.

[0012] In the above scheme, the sub-barrier dam is set to different shapes to meet different product requirements. For example, the sub-barrier dam is set to a straight line segment shape to reduce processing costs; the sub-barrier dam is set to a broken line segment shape to improve the stress buffering effect of the sub-barrier dam; the sub-barrier dam is set to a curved shape to improve the stretching performance of the stretchable display panel.

[0013] In a specific embodiment of the first aspect of the present disclosure, on each pixel island, a distance from an end of the second type barrier dam facing away from the substrate to the substrate is greater than a distance from an end of the first type barrier dam facing away from the substrate to the substrate.

[0014] In the above scheme, by minimizing the height of the first type of barrier dam, the height difference between the pixel island and other structures such as the stretching area (stretching bridge) is reduced, thereby reducing the risk of stress concentration problems at the connection between the pixel island and the stretching area.

[0015] In a specific embodiment of the first aspect of the present disclosure, at least two adjacent and spaced-apart second-type blocking dams are provided on each pixel island, and on each pixel island, the closer the second-type blocking dam is to the display layer, the smaller the distance from the end thereof facing away from the substrate to the substrate.

[0016] In the above scheme, in which the height of the second type of barrier dam far away from the display layer is set to be higher than the height of the second type of barrier dam relatively close to the display layer, the higher second type of barrier dam can be used to buffer the impact of the sprayed ink during inkjet in subsequent processes such as the preparation of the organic encapsulation layer, thereby reducing the risk of ink splashing to the periphery of the first type of barrier dam.

[0017] In a specific embodiment of the first aspect of the present disclosure, the stretched display panel further includes a second encapsulation layer and a third encapsulation layer covering the first encapsulation layer, and the second encapsulation layer is located between the first encapsulation layer and the third encapsulation layer. For example, further, the first encapsulation layer and the second encapsulation layer are inorganic encapsulation layers, and the second encapsulation layer is an organic encapsulation layer.

[0018] In the above solution, the above packaging structure can reduce the influence of external force on the packaging effect of the pixel island, and is less likely to cause packaging failure, thereby improving the reliability of the stretched display panel.

[0019] In a specific embodiment of the first aspect of the present disclosure, in each pixel island, the display layer includes a plurality of pixels, each pixel includes at least two light-emitting units that emit light of different colors, and each light-emitting unit includes a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked on a substrate. For example, further, the light-emitting unit includes a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit, the first light-emitting unit emits a first color light, the second light-emitting unit emits a second color light, and the third light-emitting unit emits a third color light. For example, further, the first color light is red light, the second color light is green light, and the third color light is blue light.

[0020] In a specific embodiment of the first aspect of the present disclosure, the stretched display panel further includes a stretching area, the stretching area is located between adjacent pixel islands, and a signal line is disposed in the stretching area, the signal line connecting adjacent pixel islands.

[0021] In the above solution, the stretching area generates a recoverable deformation when the stretch display panel is stretched, thereby improving the stretching performance of the stretch display panel.

[0022] A second aspect of the present disclosure provides a display device, which includes a stretched display panel according to any one of the first aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A plan view of a stretched display panel provided in accordance with an embodiment of the present disclosure.

[0024] Figure 2 for Figure 1 The cross-sectional schematic diagram of the stretched display panel along M1-N1 is shown.

[0025] Figure 3 for Figure 1 The stretched display panel shown is an enlarged view of point A.

[0026] Figure 4 for Figure 1 The stretched display panel shown is an enlarged view of point A.

[0027] Figure 5 for Figure 1 The stretched display panel shown is an enlarged view of point A.

[0028] Figure 6 for Figure 1 The stretched display panel shown is an enlarged view of point A.

[0029] Figure 7 for Figure 1 The stretched display panel shown is an enlarged view of point A.

[0030] Figure 8 for Figure 1 The stretched display panel shown is an enlarged view of point A.

[0031] Fig. 9 for Figure 1 The stretched display panel shown is an enlarged view of point A.

[0032] Fig.10 for Figure 8 The stretched display panel shown is an enlarged view of point A.

[0033] Fig.11 for Figure 8 The stretched display panel shown is an enlarged view of point A.

[0034] Fig.12 for Figure 8 The stretched display panel shown is an enlarged view of point A.

[0035] Fig.13 for Figure 8 The stretched display panel shown is an enlarged view of point A.

[0036] Fig.14 for Figure 8 The stretched display panel shown is an enlarged view of point A. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0038] In a stretched display panel, in order to meet the stretching rate requirements of the stretched display panel, a "paper cutting" method is usually adopted: its structure is roughly composed of two parts: island (pixel island)-bridge (stretching bridge), and the remaining part is punched to achieve a hollow design, thereby achieving stretchability. However, since the pixel island is affected by external forces during stretching, the problem of package failure may occur. Therefore, reducing the impact of external forces on the package film layer and increasing the package adhesion are of great significance to the reliability of the stretched display panel.

[0039] In view of this, the embodiments of the present disclosure provide a stretched display panel and a display device, which increases the package adhesion and stress buffering effect by designing the structure of the pixel island on the stretched display panel and setting a plurality of barrier dams, thereby reducing the influence of external forces on the pixel island during stretching and the risk of package failure.

[0040] An embodiment of the present disclosure provides a stretched display panel. The stretched display panel includes a plurality of pixel islands spaced apart from each other, each pixel island including a substrate, a display layer disposed on one side of the substrate, a plurality of blocking dams, and a first encapsulation layer. The plurality of blocking dams are located on the substrate and distributed on the pixel islands. At least two blocking dams are distributed on each pixel island, and on each pixel island, at least two blocking dams are arranged sequentially from the inside to the outside around the display layer. The first encapsulation layer is located on the side of the display layer and the blocking dam away from the substrate, and covers the display layer and the blocking dam. In this way, in each pixel island, the first encapsulation layer covers the surface of at least two blocking dams, thereby increasing the contact area between the first encapsulation layer and the pixel island, thereby increasing the adhesion between the first encapsulation layer and the pixel island, reducing the risk of encapsulation failure when the pixel island is stretched, and at the same time, the at least two blocking dams arranged sequentially from the inside to the outside around the display layer can also play a role in stress buffering, thereby reducing the risk of display failure in the stretched display panel.

[0041] In the following, the stretched display panel and the display device according to at least one embodiment of the present disclosure are described in conjunction with the accompanying drawings. In addition, as shown in the accompanying drawings, in at least one embodiment of the present disclosure, a spatial rectangular coordinate system is established with the surface where the stretched display panel is located as a reference to define the positions of the various film layers in the stretched display panel. In the spatial rectangular coordinate system, the X-axis and the Y-axis are parallel to the surface where the stretched display panel is located, and the Z-axis is perpendicular to the surface where the stretched display panel is located.

[0042] In at least one embodiment of the present disclosure, Figure 1 , Figure 2 and Figure 3 The stretched display panel shown in FIG. The stretched display panel includes a plurality of pixel islands 100 spaced apart from each other. Figure 2 Each pixel island 100 shown includes a substrate 110 , a display layer 120 , and a plurality of barrier dams 130 .

[0043] The substrate 110 may include a substrate 111 and a driving circuit layer located on the substrate 111, the driving circuit layer includes a plurality of pixel driving circuits located in the display area, and the display function layer is located on the driving circuit layer. For example, the pixel driving circuit may include a plurality of transistors TFT, capacitors, etc., for example, formed in various forms such as 2T1C (i.e., 2 transistors TFT and 1 capacitor (C)), 3T1C or 7T1C, Figure 2 A transistor TFT in a pixel driving circuit is shown. The pixel driving circuit is connected to the light-emitting unit 101 to control the switching state and the light-emitting brightness of the light-emitting unit 101. The substrate 110 may also include a flat layer 112, and the transistor TFT is located between the substrate 111 and the flat layer 112. The transistor TFT includes electrical structures such as an active layer, a gate electrode, and a source-drain electrode. The substrate 110 may include a buffer layer 113 located on the substrate 111, a gate insulating layer 114 located on the side of the buffer layer 113 facing away from the substrate 111, and an interlayer dielectric layer 115 located on the side of the gate insulating layer 114 facing away from the substrate 111, etc. to define the film layer where each of the above electrical structures is located.

[0044] The display layer 120 is located on the substrate 110 . Specifically, the display layer 120 is located on a side of the flat layer 112 away from the substrate 111 . The display layer 120 includes a light emitting unit to have an image display function.

[0045] The barrier dams 130 are located on the substrate 110 and are distributed on the pixel islands 100. At least two barrier dams 130 are distributed on each pixel island 100, for example, three barrier dams 130, namely, a first barrier dam 134, a second barrier dam 135, and a third barrier dam 136. In addition, on each pixel island 100, at least two barrier dams 130 are sequentially arranged from the inside to the outside around the display layer 120. Specifically, the first barrier dam 134 surrounds the display layer 120, the second barrier dam 135 is located on a side of the first barrier dam 134 away from the display layer 120 and is arranged around the display layer 120, and the third barrier dam 136 is located on a side of the second barrier dam 135 away from the display layer 120 and is arranged around the display layer 120.

[0046] The first encapsulation layer 140 is located on the side of the display layer 120 and the barrier dam 130 facing away from the substrate 110, and the first encapsulation layer 140 covers the display layer 120 and the barrier dam 130. For example, the first encapsulation layer 140 covers the display layer 120, the first barrier dam 134, the second barrier dam 135, and the third barrier dam 136. In this way, compared with the first encapsulation layer 140 being laid flat on the surface, the first encapsulation layer 140 covers the outer surface of the first barrier dam 134, the second barrier dam 135, and the third barrier dam 136 and the gap, which increases the adhesion between the first encapsulation layer 140 and the pixel island 100, and the first barrier dam 134, the second barrier dam 135, and the third barrier dam 136 also have the function of buffering external stress, thereby reducing the probability of display failure of the stretched display panel due to stretching or encapsulation failure.

[0047] It should be noted that the structure of the stretched display panel is not limited to one of the implementations in the above embodiments. For example, on each pixel island 100, the specific number of at least two blocking dams 130 surrounding the display layer 120 arranged sequentially from the inside to the outside is not limited to three, but can also be four or more. At the same time, the present disclosure does not impose specific restrictions on the substrate 111. For example, the substrate 111 can be formed of an organic silicon material with good deformation properties such as polydimethylsiloxane (PDMS), which is used to stretch the display panel. When the display panel is stretched, it drives the stretched display panel to stretch and deform. Typically, the film thickness of the substrate 111 can be in the range of 50μm to 500μm. All of the above can be limited according to actual needs, so I will not go into details here.

[0048] The present disclosure does not limit the formation method of the barrier dam 130. The barrier dam 130 may be formed as follows: Figure 2 Set individually as shown, or Figure 2The structure shown in the figure is modified to be formed based on a certain film layer or multiple film layers in the stretched display panel. For example, exemplary, at least part of the blocking dam 130 can be in the same layer and the same material as the interlayer dielectric layer 115 and / or the flat layer 112 and / or the pixel defining layer 121 in the display layer 120, that is, in the process of preparing the interlayer dielectric layer 115, the flat layer 112, and the pixel defining layer 121, the blocking dam 130 is prepared synchronously. Specifically, the blocking dam 130 can be formed by using the same material and the same process steps as at least one film layer in the interlayer dielectric layer 115, the flat layer 112, and the pixel defining layer 121. For example, in the process of patterning at least one film layer in the interlayer dielectric layer 115, the flat layer 112, and the pixel defining layer 121, the part of at least one film layer in the interlayer dielectric layer 115, the flat layer 112, and the pixel defining layer 121 located on the pixel island 100 The display layer 120 is formed as part or all of the blocking dam 130. The design of the barrier dam 130 can be designed according to actual needs, and will not be elaborated here.

[0049] In the stretched display panel provided by at least one embodiment of the present disclosure, on each pixel island 100, the blocking dam 130 is classified into a first-type blocking dam 131 and a second-type blocking dam 132, the second-type blocking dam 132 is located between the first-type blocking dam 131 and the display layer 120, and the first-type blocking dam 131 is a closed ring, and the second-type blocking dam 132 includes a plurality of sub-blocking dams 133 arranged at intervals.

[0050] For example, Figure 4 As shown, the third barrier dam 136 is a first type barrier dam 131, which is a closed ring arranged around the display layer 120. The first barrier dam 134 and the second barrier dam 135 are second type barrier dams 132, and each includes a plurality of sub-barrier dams 133 arranged at intervals. The first barrier dam 134 and the second barrier dam 135 are located between the third barrier dam 136 and the display layer 120. The first barrier dam 134 and the second barrier dam 135 are arranged in a discontinuous structure, which can not only further increase the contact area between the first encapsulation layer 140 and the pixel island 100, so as to further increase the encapsulation adhesion of the first encapsulation layer 140, but also further increase the buffering stress of the first barrier dam 134 and the second barrier dam 135, thereby further improving the problem of display failure of the stretched display panel due to tension.

[0051] In a stretched display panel provided in another embodiment of the present disclosure, on each pixel island 100, the blocking dam 130 is classified into a first-type blocking dam 131 and a second-type blocking dam 132, the second-type blocking dam 132 is located between the first-type blocking dam 131 and the display layer 120, and the first-type blocking dam 131 is a closed ring, a plurality of second-type blocking dams 132 are provided, and at least one second-type blocking dam 132 is a closed ring.

[0052] For example, Figure 5 As shown, in the stretched display panel, a first barrier dam 134, a second barrier dam 135, and a third barrier dam 136 are sequentially arranged away from the display layer 120 on each pixel island 100. The third barrier dam 136 is a first-type barrier dam 131, which is a closed ring arranged around the display layer 120. The first barrier dam 134 and the second barrier dam 135 are second-type barrier dams 132, and the first barrier dam 134 is a closed ring arranged around the display layer 120, and the second barrier dam 135 includes a plurality of sub-barrier dams 133 arranged at intervals.

[0053] For example, Figure 6 As shown, the first barrier dam 134 includes a plurality of sub-barrier dams 133 arranged at intervals, and the second barrier dam 135 is a closed ring arranged around the display layer 120. Other structures can refer to the above embodiments and are not described in detail here.

[0054] For example, Figure 7 As shown, the first barrier dam 134 and the second barrier dam 135 are both closed rings disposed around the display layer 120 . Other structures may refer to the above embodiments and are not described in detail herein.

[0055] It should be noted that the present disclosure does not limit the size of the sub-barrier dams 133 included in the second type of barrier dams 132, the spacing distance between adjacent sub-barrier dams 133, and the spacing distance between adjacent barrier dams 130. These can be designed according to actual needs and will not be elaborated here.

[0056] In a stretched display panel provided by an embodiment of the present disclosure, Figure 2 As shown, the cross-section of the barrier dam 130 in the direction perpendicular to the substrate 110 is a trapezoid. In the stretched display panel provided by at least one embodiment of the present disclosure, the cross-section of the barrier dam 130 in the direction perpendicular to the substrate 110 is an inverted trapezoid. For example, the cross-sections of the first barrier dam 134, the second barrier dam 135, and the third barrier dam 136 in the direction perpendicular to the substrate 111 are inverted trapezoids. In this way, the contact area between the first encapsulation layer 140 and the barrier dam 130 can be increased, and the chamfer of the trapezoid can be used to increase the bonding force between the film layers, which can reduce the risk of the first encapsulation layer 140 peeling off under the action of external force.

[0057] It should be noted that the definition of the cross-section of the barrier dam 130 in the direction perpendicular to the substrate 110 is not limited to the above embodiments. For example, the shape of the cross section corresponding to the first barrier dam 134, the second barrier dam 135 and the third barrier dam 136 is a regular trapezoid. For example, any one of the first barrier dam 134, the second barrier dam 135 and the third barrier dam 136 is provided with grooves and protrusions on the surface and / or side wall facing away from the substrate 111 to increase the strength of the bonding force between the film layers. At the same time, the shapes of the cross sections corresponding to the first barrier dam 134, the second barrier dam 135 and the third barrier dam 136 can be the same or different. All of the above can be designed according to actual needs and will not be described in detail here.

[0058] After defining the classification of the barrier dam 130 and the corresponding cross-sectional shape, the embodiment of the present disclosure also designs the relative position relationship of the second type of barrier dam 132, such as the first barrier dam 134 and the second barrier dam 135, and the specific scheme is as follows.

[0059] In a stretched display panel provided by an embodiment of the present disclosure, at least two adjacent and spaced-apart second-type barrier dams 132 are arranged on each pixel island 100 , and the sub-barrier dams 133 of the second-type barrier dams 132 are alternately arranged with the sub-barrier dams 133 of the adjacent second-type barrier dams 132 .

[0060] In the stretched display panel provided in at least one embodiment of the present disclosure, the second-type barrier dam 132 includes a first-type barrier dam 132a and a second-type barrier dam 132b, and the first-type barrier dam 132a is closer to the display layer 120 than the second-type barrier dam 132b, and the sub-barrier dam 133 of the first-type barrier dam 132a is alternately arranged with the sub-barrier dam 133 of the second-type barrier dam 132b.

[0061] For example, Figure 8As shown, the second type barrier dam 132 includes a first barrier dam 134 and a second barrier dam 135 that surround the display layer 120 in sequence, the first barrier dam 134 is located between the display layer 120 and the second barrier dam 135, that is, the first barrier dam 134 is a first second type barrier dam 132a, and the second barrier dam 135 is a second second type barrier dam 132b. The sub-barrier dams 133 of the first second type barrier dam 132a and the sub-barrier dams 133 of the second second type barrier dam 132b are arranged alternately. Specifically, the plurality of sub-barriers 133 constituting the first barrier dam 134 and the plurality of sub-barriers 133 constituting the second barrier dam 135 are arranged in a staggered manner, that is, there is a first gap between the sub-barriers 133 of the adjacent first barrier dams 134, and there is a second gap between the sub-barriers 133 of the adjacent second barrier dams 135, and the sub-barriers 133 of the second barrier dam 135 corresponding to the first gap can cover the first gap after translation, and the sub-barriers 133 of the first barrier dam 134 corresponding to the second gap can cover the second gap after translation. In this way, the staggered sub-barriers 133 can reduce the risk of cracks penetrating into the display layer in a straight line by increasing the crack propagation path when cracks are generated around the pixel island 100.

[0062] In a stretched display panel provided by an embodiment of the present disclosure, at least one sub-barrier dam 133 has a straight line segment shape; and / or at least one sub-barrier dam 133 has a broken line segment shape; and / or at least one sub-barrier dam 133 has a curved line shape. In at least one embodiment, the curved line shape includes any one of a sawtooth shape and a wavy shape.

[0063] For example, Figure 4 As shown, the sub-barrier dam 133 of the first barrier dam 134 is in the shape of a straight line segment, that is, a plurality of sub-barrier dams 133 in the shape of a straight line segment are arranged discontinuously, and finally form the first barrier dam 134 surrounding the display layer 120. At this time, the sub-barrier dam 133 of the second barrier dam 135 is in the shape of a straight line segment, that is, a plurality of sub-barrier dams 133 in the shape of a straight line segment are arranged discontinuously, and finally form the second barrier dam 135 surrounding the display layer 120.

[0064] For example, Figure 8 As shown, the first barrier dam 134 and the second barrier dam 135 respectively include a plurality of straight-line-shaped sub-barrier dams 133 and four folded-line-shaped sub-barrier dams 133 , and the four folded-line-shaped sub-barrier dams 133 are respectively located at the corners of the first barrier dam 134 and the second barrier dam 135 .

[0065] For example, Fig. 9 As shown, the first barrier dam 134 and the second barrier dam 135 include four sub-barrier dams 133 in the shape of a broken line segment, respectively, and the four sub-barrier dams 133 in the shape of a broken line segment are located at the corners of the first barrier dam 134 and the second barrier dam 135 .

[0066] The shape of the surface of the sub-barrier dam 133 of the first barrier dam 134 and / or the sub-barrier dam 133 of the second barrier dam 135 facing away from the substrate 111 is not limited to the rectangle shown in the figure, and can also be other designs. For example, the shape of the surface of the sub-barrier dam 133 of the first barrier dam 134 and / or the sub-barrier dam 133 of the second barrier dam 135 facing away from the substrate 111 has at least one angle that is not a right angle, for example, a pentagon, a hexagon, or an octagon. In this way, the risk of stress concentration between the first encapsulation layer 150 and the sub-barrier dam 133 can be reduced.

[0067] For example, Fig.10 As shown in FIG. 1 , for example, the surface of the sub-blocking dam 133 of the first blocking dam 134 is octagonal in shape. Specifically, a plurality of sub-blocking dams 133 having octagonal surfaces and being in the shape of straight segments are disposed discontinuously, and finally form the first blocking dam 134 surrounding the display layer 120. Regarding the shape design of the sub-blocking dam 133 of the second blocking dam 135, please continue to refer to FIG. Figure 7 As shown, it is a straight line segment, and the corresponding surface is a rectangle. You can also refer to Fig.11 As shown, it is a straight line segment shape, and the corresponding surface is an octagon.

[0068] For example, Fig.12 As shown, the sub-barrier dam 133 of the first barrier dam 134 is wavy in shape, that is, a plurality of wavy sub-barrier dams 133 are disposed discontinuously, and finally form the first barrier dam 134 surrounding the display layer 120. Regarding the shape design of the sub-barrier dam 133 of the second barrier dam 135, please continue to refer to Fig. 9 As shown, it is wavy and can be continued for reference Fig.13 As shown, it is a straight line segment shape, and can also be referred to Fig.14 As shown, it is a straight line segment shape, and the corresponding surface is an octagon.

[0069] It should be noted that the configuration of the second-type barrier dam 132 in the present disclosure is not limited to the above-mentioned embodiments and examples. For example, the number of the second-type barrier dam 132 is not limited to the first barrier dam 134 and the second barrier dam 135 in the above-mentioned examples, and may also include more, such as three or four. For example, the curved shape of the sub-barrier dam 133 mentioned in the above-mentioned embodiment is not limited to the wavy shape, but may also be a sawtooth shape. For example, the shapes of the sub-barrier dams 133 of the same second-type barrier dam 132 may be different or the same. The design of the sub-barrier dams 133 of different second-type barrier dams 132 may be a combination of a variety of different schemes according to actual needs. All of the above can be designed according to actual needs, and will not be elaborated here.

[0070] In at least one embodiment of the present disclosure, on each pixel island 100 , the distance from the end of the second type barrier dam 132 away from the substrate 110 to the substrate 110 is greater than the distance from the end of the first type barrier dam 131 away from the substrate 110 to the substrate 110 .

[0071] For example, see Figure 2 , the distance between the end of the first barrier dam 134 belonging to the second type of barrier dam 132 away from the substrate 110 and the substrate 110 is L1, the distance between the end of the second barrier dam 135 belonging to the second type of barrier dam 132 away from the substrate 110 and the substrate 110 is L2, and the distance between the end of the third barrier dam 136 belonging to the first type of barrier dam 131 away from the substrate 110 and the substrate 110 is L3, L1 is greater than L3, and L2 is greater than L3. In this way, the height of the first type of barrier dam 131 at the outermost periphery of the display layer 120 relative to the substrate 110 is set to be the lowest relative to the height of the first type of barrier dam 131 relative to the substrate 110, which can reduce the height difference between the pixel island 100 and the surrounding structure such as the bridge structure, and reduce the risk of stress concentration between the pixel island 100 and the bridge structure.

[0072] In the stretched display panel provided by at least one embodiment of the present disclosure, at least two adjacent and spaced-apart second-type blocking dams 132 are provided on each pixel island 100, and on each pixel island 100, the closer the second-type blocking dam 132 is to the display layer 120, the smaller the distance from the end of the second-type blocking dam 132 away from the substrate 110 to the substrate 110 is.

[0073] For example, Figure 2 As shown, among the first barrier dam 134 and the second barrier dam 135 belonging to the second type of barrier dam 132, the first barrier dam 134 is relatively close to the display layer 120, and the second barrier dam 135 is relatively far away from the display layer 120, and the distance from the end of the first barrier dam relatively close to the display layer 120 away from the substrate 110 to the substrate 110 is smaller than the distance from the end of the second barrier dam 135 relatively far away from the display layer 120 away from the substrate 110 to the substrate 110, that is, L1 is smaller than L2. In this way, in the subsequent encapsulation process, the organic material in the encapsulation layer (used to form the second encapsulation layer 150 described below) generally needs to be processed by inkjet printing. In this process, at the moment of inkjet, the relatively high second barrier dam 135 can buffer the impact of the ink, avoid ink splashing, and prevent the ink from overflowing to the outermost first type barrier dam 131, thereby improving the quality of the stretched display panel.

[0074] In a stretched display panel provided by an embodiment of the present disclosure, Figure 2The stretched display panel shown also includes a second encapsulation layer 150 and a third encapsulation layer 160 covering the first encapsulation layer 140, and the second encapsulation layer 150 is located between the first encapsulation layer 140 and the third encapsulation layer 160. In the stretched display panel provided by at least one embodiment of the present disclosure, the first encapsulation layer 140 and the second encapsulation layer 150 are inorganic encapsulation layers, and the second encapsulation layer 150 is an organic encapsulation layer. The inorganic encapsulation layer, i.e., the first encapsulation layer 140 and the third encapsulation layer 160, can be manufactured by chemical vapor deposition. The organic encapsulation layer, i.e., the second encapsulation layer 150, can be manufactured by inkjet printing. Figure 2 It can be known that the organic material in the second encapsulation layer 150, which serves as an organic encapsulation layer, enters into the gap between the second barrier dam 135 and the third barrier dam 136 through the gap between the first barrier dam 134 and the sub-barrier dam 133 in the second barrier dam 135. Specifically, the second encapsulation layer 150 covers the surface of the display layer 120 facing away from the substrate 110, the gap between the first barrier dam 134 and the display layer 120, the gap between the first barrier dam 134 and the second barrier dam 135, and the gap between the second barrier dam 135 and the third barrier dam 135.

[0075] In a stretched display panel provided by an embodiment of the present disclosure, in each pixel island 100, the display layer 120 includes a plurality of pixels 100a, each pixel 100a includes at least two light-emitting units 101 emitting light of different colors, and each light-emitting unit 101 includes a first electrode 122, a light-emitting functional layer 123, and a second electrode 124 sequentially stacked on a substrate 110.

[0076] In the stretched display panel provided in at least one embodiment of the present disclosure, the light-emitting unit 101 includes a first light-emitting unit 101a, a second light-emitting unit 101b and a third light-emitting unit 101c. The first light-emitting unit 101a emits a first color light, the second light-emitting unit 101b emits a second color light, and the third light-emitting unit 101c emits a third color light.

[0077] In the stretched display panel provided by at least one embodiment of the present disclosure, the first color light is red light, the second color light is green light, and the third color light is blue light.

[0078] For example, Figure 1 , Figure 2As shown, in each pixel island 100, the display layer 120 is arranged on the side of the flat layer 112 away from the substrate 111, and the display layer 120 includes a plurality of pixels 100a, and each pixel 100a includes at least two light-emitting units 101 that emit light of different colors. For example, the light-emitting unit includes a first light-emitting unit 101a, a second light-emitting unit 101b, and a third light-emitting unit 101c. The first light-emitting unit 101a is a red light-emitting unit, the second light-emitting unit 101b is a green light-emitting unit, and the third light-emitting unit 101c is a blue light-emitting unit, etc. Specifically, a pixel defining layer 121 is arranged on the side of the flat layer 112 away from the substrate 111, and the pixel defining layer 121 has a plurality of openings corresponding to the light-emitting areas of each light-emitting unit 101, and a first electrode 122, a light-emitting functional layer 123, and a second electrode 124 stacked in sequence are correspondingly formed in each opening.

[0079] In at least one embodiment, one of the first electrode 122 and the second electrode 124 is an anode, and the other is a cathode. For example, the first electrode 122 can be an anode, and the second electrode 124 can be a cathode.

[0080] It should be noted that the number of pixels 100a in each pixel island 100 and the number, type and arrangement of the light emitting units 101 in each pixel 100a are not limited to the above examples or Figure 1 As shown in , all of the above can be designed according to actual needs, so I will not go into details here.

[0081] In the stretched display panel provided by at least one embodiment of the present disclosure, the light-emitting functional layer 123 may include a light-emitting layer and a carrier layer, and the carrier layer is located between the first electrode 122 and the light-emitting layer, and / or between the light-emitting layer and the second electrode 124. The carrier layer may be a light-transmitting layer. The carrier layer refers to a carrier-related film layer used to realize the functions of injection, transmission, and blocking of carriers (holes or electrons). In some embodiments, the carrier layer between the first electrode 122 and the light-emitting layer may include at least one of a hole injection layer (Hole Inject Layer, HIL), a hole transport layer (Hole Transport Layer, HTL), and an electron blocking layer (Electron Blocking Layer, EBL). In some embodiments, the carrier layer between the light-emitting layer and the second electrode 124 may include at least one of an electron injection layer (Electron Inject Layer, EIL), an electron transport layer (Electron Transport Layer, ETL), and a hole blocking layer (Hole Blocking Layer, HBL).

[0082] In a stretched display panel provided by an embodiment of the present disclosure, the stretched display panel further includes a stretched area 200 , which is located between adjacent pixel islands 100 , and a signal line 210 is disposed in the stretched area 200 , which connects adjacent pixel islands 100 .

[0083] For example, Figure 1 As shown, the stretched display panel includes a plurality of pixel islands 100 and a plurality of stretching areas 200 such as a stretching bridge (bridge structure). The plurality of pixel islands 100 are arranged at intervals, and two adjacent pixel islands 100 are connected by the stretching area 200. The pixel island 100 includes at least one pixel, and the stretching area 200 includes a signal line 210 electrically connected to the pixel. The signal line 210 may include one or more signal lines 210 such as a gate line, a data line, and a power signal line 210. The present disclosure does not specifically limit the structure of the stretching area 200 such as the stretching bridge, and it can be designed according to the needs, so it will not be repeated here.

[0084] In an embodiment of the present disclosure, the signal line may be configured to be, for example, in a curved shape, so as to have a stretching function.

[0085] An embodiment of the present disclosure provides a display device, which includes the stretched display panel of any one of the above embodiments.

[0086] In an embodiment of the present disclosure, the display device may be an organic light emitting diode display device, a liquid crystal display device, an electronic paper display device, or the like.

[0087] For example, the display device in the embodiments of the present disclosure may be any product or component with a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a laptop computer, a navigator, or the like.

[0088] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A stretched display panel, characterized in that: The invention comprises a plurality of pixel islands spaced apart from each other, wherein each of the pixel islands comprises: substrate; A display layer, disposed on one side of the substrate; a plurality of barrier dams located on the substrate and distributed on the pixel islands, wherein at least two barrier dams are distributed on each pixel island, and on each pixel island, at least two barrier dams are arranged in sequence from the inside to the outside surrounding the display layer; and The first encapsulation layer is located on a side of the display layer and the barrier dam facing away from the substrate, and covers the display layer and the barrier dam.

2. The stretched display panel according to claim 1, characterized in that: On each of the pixel islands, the barrier dams are classified into first-type barrier dams and second-type barrier dams, the second-type barrier dams are located between the first-type barrier dams and the display layer, and The first type of barrier dam is a closed ring, and the second type of barrier dam includes a plurality of sub-barrier dams arranged at intervals; Preferably, a plurality of the second type barrier dams are provided, and at least one of the second type barrier dams is in a closed ring shape; Preferably, the cross-section of the barrier dam in a direction perpendicular to the substrate is a trapezoid; Preferably, a cross-section of the barrier dam in a direction perpendicular to the substrate is in the shape of an inverted trapezoid.

3. The stretched display panel according to claim 2, characterized in that: At least two adjacent and spaced-apart second-type barrier dams are disposed on each pixel island, and the sub-barrier dams of the second-type barrier dams are arranged alternately with the sub-barrier dams of the adjacent second-type barrier dams; Preferably, the second-type blocking dam includes a first-type blocking dam and a second-type blocking dam, and the first-type blocking dam is closer to the display layer than the second-type blocking dam, and the sub-blocking dams of the first-type blocking dam are alternately arranged with the sub-blocking dams of the second-type blocking dam.

4. The stretched display panel according to claim 2 or 3, characterized in that: The shape of at least one of the sub-dams comprises a straight line segment; and / or, The shape of at least one of the sub-dams includes a broken line segment; and / or, The shape of at least one of the sub-dams comprises a curve shape, and preferably, the curve shape comprises any one of a sawtooth shape and a wave shape.

5. The stretched display panel according to claim 2, characterized in that: In each of the pixel islands, a distance from an end of the second-type barrier dam facing away from the substrate to the substrate is greater than a distance from an end of the first-type barrier dam facing away from the substrate to the substrate.

6. The stretched display panel according to claim 5, characterized in that: At least two adjacent and spaced-apart second-type blocking dams are disposed on each pixel island, and on each pixel island, the closer the second-type blocking dam is to the display layer, the smaller the distance from the end of the second-type blocking dam facing away from the substrate to the substrate.

7. The stretched display panel according to claim 1, characterized in that: The stretched display panel further includes a second encapsulation layer and a third encapsulation layer covering the first encapsulation layer, wherein the second encapsulation layer is located between the first encapsulation layer and the third encapsulation layer; Preferably, the first encapsulation layer and the second encapsulation layer are inorganic encapsulation layers, and the second encapsulation layer is an organic encapsulation layer.

8. The stretched display panel according to any one of claims 1 to 3, characterized in that: In each of the pixel islands, the display layer includes a plurality of pixels, each of the pixels includes at least two light-emitting units emitting light of different colors, and each of the light-emitting units includes a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked on the substrate; Preferably, the light emitting unit comprises a first light emitting unit, a second light emitting unit and a third light emitting unit, the first light emitting unit emits a first color light, the second light emitting unit emits a second color light, and the third light emitting unit emits a third color light; Preferably, the first color light is red light, the second color light is green light, and the third color light is blue light.

9. The stretched display panel according to claim 1, characterized in that: The stretched display panel further includes a stretched area, the stretched area is located between adjacent pixel islands, and a signal line is arranged in the stretched area, the signal line connects adjacent pixel islands.

10. A display device, characterized in that: A stretched display panel comprising any one of claims 1-9.

Images