Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel has a deformation state in a first direction. The display panel comprises a supporting layer and a plurality of pixel islands, the supporting layer comprises a plurality of first supporting parts arranged at intervals in the first direction, and the first supporting parts extend in the second direction; the second direction is intersected with the first direction; the orthographic projection of at least part of the pixel islands on the supporting layer is at least overlapped with the first supporting part. According to the scheme, the width reduction probability of the display panel during stretching can be reduced, and the display effect is improved.

Description

Technical Field

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

[0002] With the development of display technology, stretchable display panels have emerged. Stretchable display means that the area of ​​the display can be expanded (or compressed) under the action of tension to meet the needs of consumers in different usage scenarios.

[0003] However, the display effect of stretchable display panels needs to be improved. Summary of the invention

[0004] The main technical problem solved by the present application is to provide a display panel and a display device, which can reduce the probability of the width of the display panel decreasing when stretched and improve the display effect.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: providing a display panel, which has a deformation state along a first direction; the display panel includes a supporting layer and a plurality of pixel islands, the supporting layer includes a plurality of first supporting portions arranged at intervals along the first direction, and the first supporting portions extend along a second direction; the second direction intersects with the first direction; the orthographic projection of at least part of the pixel islands on the supporting layer overlaps with at least the first supporting portion.

[0006] In order to solve the above technical problem, a technical solution adopted in the present application is: to provide a display device, comprising the display panel of any embodiment.

[0007] The beneficial effects of the present application are as follows: Different from the prior art, the display panel of the present application has a graphical design for the support layer, wherein the support layer is arranged at intervals along the first direction, i.e., the stretching direction. Since the support layer is divided into a plurality of first support portions along the stretching direction, the deformation capacity in this direction is increased by increasing the spacing between the first support portions when the support layer is stretched, and since the support layer extends and is connected as a whole along the second direction, i.e., the direction intersecting the stretching direction, the stiffness of the support layer in this direction is greater than the stiffness in the stretching direction, i.e., the Poisson's ratio of the support layer is increased. When the display panel is stretched, the deformation amount of the support layer in the stretching direction is ensured while the deformation amount of the support layer in the second direction is reduced. Since at least part of the pixel islands overlap with the first support portion, the pixel islands can move synchronously with the first support portion. When the display panel is stretched, the spacing of the pixel islands along the stretching direction increases, ensuring the synchronous increase of the display area after being stretched, while the spacing of the pixel islands in the second direction is not easy to be reduced, thereby reducing the impact on the display effect in this direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1is a top view of an embodiment of a display panel of the present application;

[0009] Figure 2 is a partial structural schematic diagram of a pixel island and a first connecting line of the present application;

[0010] Figure 3 is a schematic structural diagram of another embodiment of a display panel of the present application;

[0011] Figure 4 is a top view of another embodiment of the display panel of the present application;

[0012] Figure 5 is a schematic structural diagram of another embodiment of a display panel of the present application;

[0013] Figure 6 is a schematic structural diagram of another embodiment of a display panel of the present application;

[0014] Figure 7 It is a schematic structural diagram of another embodiment of the display panel of the present application. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and effect of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0016] In order to improve the stretching performance of the display panel, some materials in the display panel usually have good deformation ability. However, materials with strong deformation ability usually have strong lateral deformation effect, which makes the width of the display panel in the lateral direction decrease when it is stretched longitudinally, resulting in a "waist" problem, affecting the display effect.

[0017] See also Figure 1 , Figure 1 1 is a top view of an embodiment of a display panel of the present application. The display panel 10 has a first direction ( Figure 1 The display panel 10 includes a support layer 1 and a plurality of pixel islands 3. The support layer 1 includes a plurality of first support portions 11 spaced apart along a first direction. The first support portions 11 are spaced apart along a second direction ( Figure 1 The second direction extends in the Y direction, and the second direction intersects the first direction. Specifically, the second direction is perpendicular to the first direction.

[0018] The display panel 10 of the present application has a graphical design for the support layer 1, wherein the support layer 1 is arranged along a first direction (i.e. Figure 1The first support portion 11 is arranged at intervals along the first direction (in the middle X direction). Since the support layer 1 is divided into multiple first support portions 11 along the first direction, the deformation capacity in this direction can be increased by increasing the spacing between the first support portions 11 when the support layer 1 is stretched. Since the first support portion 11 is an integrated structure extending along the second direction, the stiffness of the support layer 1 in the second direction is greater than the stiffness in the first direction, that is, the Poisson's ratio of the support layer 1 is increased (defined as the ratio of transverse strain to longitudinal strain, also called transverse strain coefficient. In this application, the first direction can be understood as longitudinal and the second direction can be understood as transverse). The above arrangement ensures that the deformation of the support layer 1 in the stretching direction is guaranteed when the support layer 1 is stretched, and at the same time, reduces the deformation of the support layer 1 in the second direction.

[0019] Specifically, in order to ensure that the Poisson's ratio of the support layer 1 is large enough, the material of the first support portion 11 may include one or more materials with relatively high rigidity, such as polyethylene terephthalate PET, transparent polyimide CPI, and carbon fiber.

[0020] Optionally, the interval d between any two adjacent first support portions 11 is the same. Since the plurality of first support portions 11 are evenly distributed along the first direction, the display panel 10 can be evenly and stably supported in both the stretched state and the non-stretched state.

[0021] The orthographic projections of at least some of the pixel islands 3 on the supporting layer 1 overlap at least with the first supporting portion 11. Specifically, in this embodiment, the plurality of pixel islands 3 are arranged at intervals along the first direction and the second direction, that is, they are arranged in a matrix; optionally, the orthographic projections of the plurality of pixel islands 3 arranged at intervals along the second direction on the supporting layer 1 are located in the same first supporting portion 11. In other embodiments, the plurality of pixel islands 3 may be only partially connected to the first supporting portion 11, and the positions at which different pixel islands 3 are connected to the first supporting portion 11 may be different.

[0022] Optionally, a second connection line 4 is connected between two adjacent pixel islands 3. Figure 2 , Figure 2 Pixel island 3 includes a stacked substrate 31, an array layer 32 and a light emitting layer 33. Array layer 32 includes a wiring layer, and second connection line 4 and wiring layer can be arranged in the same layer for easy preparation.

[0023] The first support portion 11 is used to support the pixel island 3 above, and the pixel island 3 can move synchronously with the first support portion 11. In the unstretched state, the second connecting line 4 is in a bent state. When the display panel is stretched, the spacing between the two rows of pixel islands 3 on the two adjacent first support portions 11 in the first direction increases. At the same time, the curvature of the second connecting line 4 between the two adjacent rows of pixel islands 3 decreases and is gradually straightened. Since the pixel island 3 can move along the stretching, the synchronous increase of the display area after stretching is guaranteed; while the spacing between the pixel islands 3 in the second direction is not easy to shrink, or the shrinkage is less than the increase in the spacing between the pixel islands 3 in the first direction, thereby reducing the impact on the display effect in this direction.

[0024] Optionally, see Figure 3 , Figure 3 1 is a schematic diagram of the structure of another embodiment of the display panel of the present application. The display panel 10 also includes a first adhesive layer 2 disposed between the support layer 1 and the pixel island 3, and the first adhesive layer 2 includes a first direction ( Figure 3 The first adhesive portion 21 is provided between the pixel island 2 and the first support portion 11. The first adhesive portion 21 is used to connect the pixel island 2 and the first support portion 11. Since the first adhesive portion 21 is arranged at intervals in the first direction like the first support portion 11, the second connection line 4 between the two rows of pixel islands 3 on two adjacent first support portions 11 does not contact the first adhesive layer 2, thereby reducing the resistance of the first adhesive layer 2 to the second connection line 4 during the expansion and contraction process, thereby protecting the second connection line 4 and reducing the probability of its breakage. Specifically, the material of the first adhesive layer 2 can be a stretchable adhesive, such as acrylic acid, silicone and other materials. The elastic modulus of the above materials is small, has strong stretchability, and can move synchronously with the pixel island 2. The first adhesive layer 2 can be formed on the first support portion 11 by inkjet printing or silk screen printing.

[0025] See also Figure 4 , Figure 4 It is a top view of another embodiment of the display panel of the present application (the second adhesive layer and the elastic cover plate are hidden). In one embodiment, the first adhesive portion 21 can extend along the second direction (Y direction). Specifically, the orthographic projections of the plurality of pixel islands 3 arranged at intervals along the second direction on the support layer 1 are located in the same first support portion 11, and the orthographic projection of the first adhesive portion 21 on the support layer 1 is located in the first support portion 11. Since the first adhesive portion 21 is integrally arranged in the second direction and is spaced apart in the first direction, the stiffness of the first adhesive layer 2 in the first direction is less than the stiffness in the second direction, so that the deformation amount in the stretching direction is guaranteed, and at the same time, the deformation amount of the first adhesive layer 2 perpendicular to the stretching direction is reduced.

[0026] In another embodiment, the first adhesive portion 21 may include a plurality of first sub-adhesive portions 211 spaced apart along the second direction. Further, the orthographic projection of the first sub-adhesive portion 211 on the first support portion 11 is located outside the orthographic projection of the second connection line 4 on the first support portion 11. Figure 1 In the embodiment shown, the first sub-glue portion 211 coincides with the orthographic projection of the pixel island 2 on the first supporting portion 11, so Figure 1 The first sub-glue portion 211 cannot be shown in the top view. In this embodiment, the second connection lines 4 between two adjacent rows of pixel islands 3 in the second direction are also not in contact with the first glue layer 2, that is, all the second connection lines 4 between the pixel islands 3 are not connected to the first glue layer 2, thereby further reducing the resistance in all directions caused by the first glue layer 2 to the second connection lines 4 during the deformation process, further protecting the second connection lines 4 and reducing the probability of their breakage.

[0027] Optionally, continue to Figure 3 , the display panel 10 also includes a second adhesive layer 5 and an elastic cover plate 6. Among them, the elastic cover plate 6 is arranged on the side of the pixel island 2 away from the supporting layer 1, and the elastic modulus of the elastic cover plate 6 is less than the elastic modulus of the first supporting portion 11. The elastic cover plate 6 is used to protect the pixel island 2. Due to its small elastic modulus, it has a good stretching function and can deform with stretching. Specifically, the material of the elastic cover plate 6 can be a material with high transparency such as modified polyurethane, polydimethylsiloxane, etc., which has a high transmittance while having a stretching function to ensure that the light emission of the pixel island 3 can pass through the elastic cover plate 6 to ensure a higher display effect. The second adhesive layer 5 is arranged on multiple pixel islands 2 and the elastic cover plate 6, and is used to connect the pixel island 2 and the elastic cover plate 6. The second adhesive layer 5 includes multiple second adhesive portions 51 arranged at intervals along the first direction. Since the second adhesive portion 51 is the same as the first adhesive portion 21, both are spaced apart in the first direction, so that the second connecting line 4 between the two rows of pixel islands 3 on the two adjacent first support portions 11 does not contact the second adhesive layer 5, thereby reducing the resistance of the second connecting line 4 to the second adhesive layer 5 during the expansion and contraction process, thereby protecting the second connecting line 4 and reducing the probability of its breakage. Specifically, the material of the second adhesive layer 5 can also be a stretchable adhesive, such as acrylic acid, silicone and other materials. The elastic modulus of the above materials is small, has strong stretchability, and can move synchronously with the pixel island 2. In addition, since the second adhesive layer 5 is located on the display side, in order to ensure the display effect, the second adhesive layer 5 should have a higher transmittance, as well as lower haze and yellowness. The second adhesive layer 5 can be formed on the pixel island 3 or the elastic cover plate 6 by inkjet printing or silk screen printing.

[0028] In one embodiment, the second adhesive portion 51 may extend along the second direction. Since the second adhesive portion 51 is integrally arranged in the second direction and spaced apart in the first direction, the rigidity of the second adhesive layer 5 in the first direction is smaller than that in the second direction, thereby ensuring the deformation amount in the stretching direction and reducing the deformation amount of the second adhesive layer 5 perpendicular to the stretching direction.

[0029] In another embodiment, the second adhesive portion 51 may include a plurality of second sub-adhesive portions 511 spaced apart along the second direction. Further, the orthographic projection of the second sub-adhesive portion 511 on the first support portion 11 is located outside the orthographic projection of the second connection line 4 on the first support portion 11. In this embodiment, the second connection line 4 between two adjacent rows of pixel islands 3 in the second direction is also not in contact with the second adhesive layer 5, that is, all the second connection lines 4 between the pixel islands 3 are not connected to the second adhesive layer 5, thereby further reducing the resistance of the second connection line 4 in all directions brought by the second adhesive layer 5 during the deformation process, further protecting the second connection line 4 and reducing the probability of its breakage.

[0030] It should be noted that although the materials of the first adhesive layer 2, the second adhesive layer 5 and the elastic cover plate 6 are all stretchable elastic materials with a small elastic modulus and a small Poisson ratio, they are prone to shrinkage deformation in the second direction when stretched in the first direction. However, since the Poisson ratio of the supporting layer 1 is relatively large, when the display panel is stretched and deformed in the first direction, the first adhesive layer 2, the second adhesive layer 5 and the elastic cover plate 6 can be prevented from shrinking in the second direction, thereby preventing the spacing between the multiple pixel islands 3 in the second direction from being reduced, thereby ensuring the display effect.

[0031] In other embodiments, the supporting layer 1 may further include other structures connected to the first supporting portion 11 .

[0032] For example, see Figure 5 , Figure 5 1 is a schematic diagram of the structure of another embodiment of the display panel of the present application. The support layer 1 also includes a second support portion 12, which is located between two adjacent first support portions 11, and the elastic modulus of the second support portion 12 is smaller than the elastic modulus of the first support portion 11. In this embodiment, the support layer 1 includes the first support portion 11 and the second support portion 12 arranged alternately. Since the rigidity of the second support portion 12 is smaller than the rigidity of the first support portion 11, when the support layer 1 is arranged along the first direction ( Figure 4 When the support layer 1 is stretched in the X direction, the deformation of the second support portion 12 is greater than that of the first support portion 11. When the support layer 1 is stretched, the second support portion 12 can be deformed to increase the spacing between the first support portions 11, thereby improving the deformation capacity in this direction. Figure 1The first support portion 11 is an integrated structure in the Y direction, so that when the support layer 1 is stretched, the deformation of the first support portion 11 in the second direction is limited, thereby reducing the reduction in the spacing between the pixel islands 3 in this direction and ensuring the display effect.

[0033] Optionally, the upper and lower surfaces of the second support portion 12 can be flush with the upper and lower surfaces of the first support portion 11, respectively, so that the upper and lower surfaces of the support layer 1 are both flat, the display panel can be stably placed, and it is convenient to prepare various film layer structures on the support layer 1. In other embodiments, the thickness of the second support portion 12 can also be less than the thickness of the first support portion 11.

[0034] For example, see Figure 4 and Figure 6 , Figure 6 It is a structural schematic diagram of another embodiment of the display panel of the present application. A first connecting line 13 is connected between two adjacent first support portions 11. In an unstretched state, the first connecting line 13 is in a bent state. When the display panel is stretched, the spacing between the two adjacent first support portions 11 in the first direction increases, and the first connecting line 13 is gradually straightened, thereby improving the deformation capacity in this direction. Since the first support portion 11 is an integrated structure along the second direction, when the support layer 1 is stretched, the deformation amount of the first support portion 11 in the second direction is limited, thereby reducing the amount of reduction in the spacing between the pixel islands 3 in this direction, and ensuring the display effect. Specifically, the first connecting line 13 and the first support portion 11 are made of the same material, and the two can be prepared simultaneously. By etching or laser cutting a hollow structure on the support layer 1, a support layer 1 with a first connecting line 13 is formed. The number and arrangement density of the first connecting lines 13 can be adjusted according to the demand for rigidity. For example, the rigidity of the support layer 1 can be increased by increasing the number and arrangement density of the first connecting lines 13, thereby reducing the deformation of the support layer 1 in the first direction. Of course, the elastic tensile deformation of the support layer 1 can also be increased by reducing the number and arrangement density of the first connecting lines 13.

[0035] For example, see Figure 7 , Figure 7It is a structural schematic diagram of another embodiment of the display panel of the present application. The support layer 1 includes a second support portion 12 and a first connecting line 13 at the same time. The second support portion 12 is located between two adjacent first support portions 11 and fills outside the first connecting line 13. The elastic modulus of the second support portion 12 is less than the elastic modulus of the first support portion 11. When the support layer 1 is stretched along the first direction, the second support portion 12 is deformed along the first direction, and the first connecting line 13 is straightened, and the spacing between the first support portions 11 increases, thereby improving the deformation capacity in this direction, and because the second support portion 12 and the first connecting line 13 are provided between the first support portions 11 at the same time, the stiffness of the first support portion 11 in the first direction is improved. Since the first support portion 11 is an integrated structure along the second direction, when the support layer 1 is stretched, the deformation amount of the first support portion 11 in the second direction is limited, thereby reducing the reduction amount of the spacing between the pixel islands 3 in this direction, and ensuring the display effect.

[0036] Since the above structure is connected between the first support parts 11 through the second support parts 12 and / or the first connecting lines 13, it is not easy for multiple first support parts 11 to be misaligned in the second direction, thereby avoiding misalignment of multiple pixel islands 3 on the first support parts 11 and ensuring accurate display of the display image.

[0037] In other embodiments of the present application, a display device is provided, including the display panel in any embodiment, and the display device can be a mobile phone, a tablet computer, a wearable device, etc.

[0038] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: It has a deformation state along a first direction; The display panel comprises: A support layer, the support layer comprising a plurality of first support portions spaced apart along the first direction, the first support portions extending along a second direction; the second direction intersects the first direction; There are a plurality of pixel islands, and the orthographic projections of at least some of the pixel islands on the supporting layer overlap with at least the first supporting portion.

2. The display panel according to claim 1, characterized in that: A plurality of the pixel islands are arranged at intervals along the second direction; Preferably, the plurality of pixel islands are also arranged at intervals along the first direction; Preferably, the orthographic projections of the plurality of pixel islands arranged at intervals along the second direction on the supporting layer are located in the same first supporting portion; Preferably, the second direction is perpendicular to the first direction.

3. The display panel according to claim 1, characterized in that: The supporting layer further includes a second supporting portion, which is disposed between two adjacent first supporting portions, and an elastic modulus of the second supporting portion is smaller than an elastic modulus of the first supporting portion.

4. The display panel according to claim 1, 2 or 3, characterized in that: A first connecting line is connected between two adjacent first supporting parts, and the first connecting line is made of the same material as the first supporting part; Preferably, a second connecting line is arranged between two adjacent pixel islands.

5. The display panel according to claim 1, characterized in that: Also includes: A first adhesive layer, comprising a plurality of first adhesive portions arranged at intervals along the first direction, wherein the first adhesive portions are arranged between the pixel islands and the first supporting portion; Preferably, the first adhesive portion includes a plurality of first sub-adhesive portions spaced apart along the second direction; Preferably, the orthographic projection of the first sub-adhesive portion on the first supporting portion is located outside the orthographic projection of the first connecting line on the first supporting portion; Preferably, an orthographic projection of the first sub-glue portion on the first supporting portion coincides with an orthographic projection of the pixel island on the first supporting portion.

6. The display panel according to claim 1, characterized in that: Also includes: An elastic cover plate is arranged on a side of the plurality of pixel islands away from the support layer, and an elastic modulus of the elastic cover plate is smaller than an elastic modulus of the first support portion.

7. The display panel according to claim 6, characterized in that: Also includes: A second adhesive layer, disposed between the plurality of pixel islands and the elastic cover plate, the second adhesive layer comprising a plurality of second adhesive portions spaced apart along the first direction; Preferably, the second adhesive portion includes second sub-adhesive portions spaced apart along the second direction; Preferably, the orthographic projection of the second sub-adhesive portion on the first supporting portion is located outside the orthographic projection of the first connecting line on the first supporting portion; Preferably, an orthographic projection of the second sub-glue portion on the first supporting portion coincides with an orthographic projection of the pixel island on the first supporting portion.

8. The display panel according to claim 1, characterized in that: The distances between any two adjacent first supporting parts are the same.

9. The display panel according to claim 1, characterized in that: The material of the first supporting part includes one or more of polyethylene terephthalate, transparent polyimide or carbon fiber.

10. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-9.

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