A display panel and display device

Abstract

This application provides a display panel and display device, relating to the field of display technology. The display panel includes: a stretchable substrate, including a first back film layer, and a first adhesive layer and a first support portion located on the first back film layer; a display substrate, located on the side of the first adhesive layer and the first support portion away from the first back film layer, including a plurality of display units spaced apart from each other, a connecting unit located between two adjacent display units, and a cutout area located between the display units and the connecting unit; wherein, the orthographic projection of the first adhesive layer on the first back film layer overlaps with the orthographic projections of some of the display units on the first back film layer, and the orthographic projection of the first support portion on the first back film layer overlaps with at least some of the orthographic projections of the display units on the first back film layer. The display panel provided in this application has a low film layer damage rate and high reliability during stretching.

Description

Technical Field

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

[0002] Flexible display panels are display panels made from flexible materials. Due to their rollability, wide viewing angles, and portability, flexible display panels have broad application prospects and good market potential in portable products and most display applications. Among them, flexible stretchable display panels are an important type of flexible display panel.

[0003] In related technologies, the film layer of flexible stretchable display panels is easily damaged during the stretching process, which leads to low product reliability. Summary of the Invention

[0004] The embodiments of this application provide a display panel and a display device, which can reduce the probability of film damage during stretching and improve the reliability of the display panel.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, embodiments of this application provide a display panel, including:

[0007] A stretchable substrate includes a first back film layer, a first adhesive layer and a first support portion located on the first back film layer; the orthographic projection of the first adhesive layer on the first back film layer and the orthographic projection of the first support portion on the first back film layer do not overlap.

[0008] The display substrate, located on the side of the first adhesive layer and the first support portion away from the first back film layer, includes a plurality of display units spaced apart from each other, a connecting unit located between two adjacent display units, and a cutout area located between the display units and the connecting unit;

[0009] Protective substrate, covering the display substrate;

[0010] Wherein, the orthographic projection of the first adhesive layer on the first back film layer overlaps with the orthographic projection of a portion of the display unit on the first back film layer, and the orthographic projection of the first support portion on the first back film layer overlaps with at least a portion of the orthographic projection of the display unit on the first back film layer.

[0011] In at least one embodiment of this application, the first support portion includes a plurality of first support units spaced apart from each other; the orthographic projection of the first support unit on the first back film layer overlaps with the orthographic projection of a portion of the display unit on the first back film layer.

[0012] In at least one embodiment of this application, the first support portion further includes a first support layer, which is located between the first back film layer and the first support unit;

[0013] The orthographic projection of the first support unit on the first back film layer falls within the orthographic projection of the first support layer on the first back film layer.

[0014] In at least one embodiment of this application, the shape of the orthographic projection of the first adhesive layer onto the first backing film layer is annular;

[0015] The orthographic projection of the first support portion onto the first back film layer falls within the area enclosed by the orthographic projection of the first adhesive layer onto the first back film layer.

[0016] In at least one embodiment of this application, the display unit includes a plurality of first display units;

[0017] A portion of the orthographic projection of each of the first display units on the first back film layer overlaps with the orthographic projection of the first adhesive layer on the first back film layer; a portion of the orthographic projection of each of the first display units on the first back film layer overlaps with the orthographic projection of the first support unit on the first back film layer;

[0018] There is a gap between the first support unit and the first adhesive layer.

[0019] In at least one embodiment of this application, the stretchable substrate further includes:

[0020] The second back film layer is located on the side of the first back film layer away from the display substrate;

[0021] The second adhesive layer is located between the second back film layer and the first back film layer;

[0022] The second support portion is located between the second back film layer and the first back film layer;

[0023] The orthographic projection of the second adhesive layer on the first back film layer and the orthographic projection of the second support portion on the first back film layer do not overlap.

[0024] In at least one embodiment of this application, the second support portion includes a second support unit and a second support layer;

[0025] The second support layer is located on the side of the second back film layer closest to the first back film layer;

[0026] The second support unit is located on the side of the second support layer closest to the first back film layer;

[0027] The orthographic projection of the second support unit on the first back film layer falls within the orthographic projection of the second support layer on the first back film layer.

[0028] In at least one embodiment of this application, a gap exists between the connecting unit and the stretchable substrate.

[0029] In at least one embodiment of this application, the protective substrate includes an anti-reflective layer covering the display substrate, a protective layer covering the anti-reflective layer, and a third adhesive layer located between the anti-reflective layer and the protective layer;

[0030] Wherein, the orthographic projection of the anti-reflective layer on the first back film layer and the orthographic projection of the display substrate on the first back film layer overlap.

[0031] Alternatively, the orthographic projection of the antireflective layer onto the first backing layer coincides with the first backing layer.

[0032] Secondly, embodiments of this application provide a display device including a display panel as described in any one of the first aspects.

[0033] Embodiments of this application provide a display panel and a display device. The display panel includes a stretchable substrate, a display substrate, and a protective substrate. The stretchable substrate includes a first back film layer, a first adhesive layer, and a first support portion located on the first back film layer. The orthographic projection of the first adhesive layer on the first back film layer and the orthographic projection of the first support portion on the first back film layer do not overlap. The display substrate is located on the side of the first adhesive layer and the first support portion away from the first back film layer and includes a plurality of display units spaced apart from each other, a connecting unit located between two adjacent display units, and a cutout area located between the display units and the connecting unit. The protective substrate covers the display substrate. The orthographic projection of the first adhesive layer on the first back film layer overlaps with the orthographic projections of some of the display units on the first back film layer, and the orthographic projection of the first support portion on the first back film layer overlaps with at least some of the orthographic projections of the display units on the first back film layer.

[0034] In the display panel provided in the embodiments of this application, on the one hand, the orthographic projection of the first adhesive layer on the first back film layer overlaps with the orthographic projection of a portion of the display units on the first back film layer, and the portion of the display units does not contact the first adhesive layer. During the stretching process of the display panel, the display units and connecting units that do not contact the first adhesive layer are not subjected to the adhesive force of the first adhesive layer, making the stretching process easier to achieve and avoiding film layer damage caused by the combined action of adhesive force and stretching force, thereby improving the reliability of the display panel. On the other hand, the orthographic projection of the first support portion on the first back film layer overlaps with at least the orthographic projection of a portion of the display units on the first back film layer. The first support portion supports a portion of the display units, reducing the degree of deformation of this portion of the display units in the direction perpendicular to the first back film layer during the stretching process, thereby improving the reliability of the display panel. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the structure of a display panel provided for an embodiment of this application;

[0037] Figure 2 A top view of a display substrate provided for an embodiment of this application;

[0038] Figure 3 A schematic diagram of a cross-sectional structure of a stretchable substrate provided for an embodiment of this application;

[0039] Figure 4 A top view of a stretchable substrate provided for an embodiment of this application;

[0040] Figures 5-8 The following are schematic diagrams illustrating the structures of four display panels provided in the embodiments of this application. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] In the embodiments of this application, the terms "first", "second", "third", "fourth" are used to distinguish the same or similar items with essentially the same function and effect, only for the purpose of clearly describing the technical solution of the embodiments of this application, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0043] In the embodiments of this application, the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] In the description of this specification, the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this application. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0045] In the embodiments of this application, "multiple" means two or more, and "at least one" means one or more, unless otherwise explicitly defined.

[0046] The features such as "parallel," "perpendicular," and "identical" used in the embodiments of this application include features in the strict sense of "parallel," "perpendicular," and "identical," as well as cases where "approximately parallel," "approximately perpendicular," and "approximately identical" include certain tolerances. Taking into account the measurement and the tolerances associated with the measurement of a specific quantity (e.g., limitations of the measurement system), they represent the acceptable deviation range for a specific value as determined by a person skilled in the art. For example, "approximately" can mean within one or more standard deviations, or within 10% or 5% of the value.

[0047] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open and encompassing, that is, "including, but not limited to".

[0048] In this application, "same layer" refers to the relationship between multiple film layers formed from the same material after undergoing the same step (e.g., a patterning process). "Same layer" here does not always mean that multiple film layers have the same thickness or the same height in a cross-sectional view. The polygons used in this specification are not strictly defined; they can be approximate triangles, parallelograms, trapezoids, pentagons, or hexagons, and may have minor deformations due to tolerances.

[0049] This application provides a display panel, referring to... Figure 1 The system includes: a stretchable substrate 1, comprising a first back film layer 11, a first adhesive layer 12 and a first support portion 13 located on the first back film layer 11; the orthographic projection of the first adhesive layer 12 on the first back film layer 11 and the orthographic projection of the first support portion 13 on the first back film layer 11 do not overlap; a display substrate 2, located on the side of the first adhesive layer 12 and the first support portion 13 away from the first back film layer 11, comprising a plurality of display units 201 spaced apart from each other, a connecting unit 202 located between two adjacent display units 201, and a cutout area 203 located between the display units 201 and the connecting unit 202; and a protective substrate 3 covering the display substrate 2; wherein the orthographic projection of the first adhesive layer 12 on the first back film layer 11 overlaps with the orthographic projection of some of the display units 201 on the first back film layer 11, and the orthographic projection of the first support portion 13 on the first back film layer 11 overlaps with at least some of the orthographic projection of the display units 201 on the first back film layer 11.

[0050] In this embodiment, the display panel includes a flexible display panel.

[0051] The embodiments of this application do not limit the type of display panel; for example, the display panel includes any one of an organic light-emitting diode (OLED) display panel, a micro light-emitting diode (Micro LED) display panel, and a mini light-emitting diode (Mini LED) display panel.

[0052] In this embodiment, the first back film layer 11 includes a stretchable back film, and in some embodiments, the material of the stretchable back film includes a flexible material.

[0053] In some embodiments, the first back film layer 11 is used to protect and support the display substrate 2; in other embodiments, the first back film layer 11 also facilitates heat dissipation of the display substrate 2.

[0054] In this embodiment, the first back film layer 11 is bonded to the display substrate 2 via the first adhesive layer 12.

[0055] The material of the first adhesive layer 12 is not limited in the embodiments of this application. For example, the material of the first adhesive layer 12 includes optical adhesive.

[0056] In this embodiment, the first support portion 13 is used to support the display unit 201 and prevent the display unit 201 from deforming along the line perpendicular to the first back film layer 11.

[0057] In some embodiments, the first support portion 13 is a single-layer structure; in other embodiments, the first support portion 13 is a multi-layer structure, and the embodiments of this application do not limit this.

[0058] The embodiments of this application do not specifically limit the material of the first support part 13. In some embodiments, part of the material of the first support part 13 includes a metal material. Metal materials have a large elastic modulus, small elastic deformation, and good support effect.

[0059] In some embodiments, there is a gap between the orthographic projection of the first adhesive layer 12 on the first back film layer 11 and the orthographic projection of the first support portion 13 on the first back film layer 11, so as to avoid contact damage between the first adhesive layer 12 and the first support portion 13 during the stretching of the stretchable substrate 1.

[0060] In this embodiment of the application, the display substrate 2 includes a flexible display substrate 2, as shown in the reference. Figure 2 The display substrate 2 includes multiple display units 201 arranged in an array, multiple connection units 202, and multiple cutout areas 203. (Reference) Figure 2 As shown, the connecting unit 202 connects two adjacent display units 201 respectively; the hollow area 203 deforms during the stretching process of the display substrate 2, realizing the stretchable function of the display substrate 2.

[0061] In this embodiment of the application, the display unit 201 includes at least one sub-pixel;

[0062] In some embodiments, the display unit 201 may include a sub-pixel, which may be any one of a red sub-pixel, a green sub-pixel, or a blue sub-pixel;

[0063] In other embodiments, the display unit 201 may include multiple sub-pixels. For example, the display unit 201 may simultaneously include at least two types of sub-pixels, such as red sub-pixels, green sub-pixels, or blue sub-pixels; alternatively, the display unit 201 may include only one type of sub-pixel, for example, only multiple red sub-pixels, or only multiple green sub-pixels, or only multiple blue sub-pixels. The specific choice can be determined according to actual requirements.

[0064] The embodiments of this application do not limit the specific structure of the light-emitting unit. In some embodiments, the light-emitting unit includes a first substrate 21 and a light-emitting device 22 stacked together; in other embodiments, the light-emitting unit also includes a touch layer 23, in which case the display panel is a touch display panel.

[0065] In this embodiment of the application, the connection unit 202 may include multiple connection lines, for example, data lines, gate lines, etc.

[0066] The shape of the cross section of the connecting unit 202 along the direction parallel to the first base 21 is not limited in this embodiment of the application; it can be strip, circle, square, etc. Figure 2 Let's take a bar as an example to illustrate.

[0067] In the embodiments of this application, such as Figure 2 As shown, the cutout area 203 is located between two adjacent display units 201, or between an adjacent display unit 201 and a connecting unit 202, or between two adjacent connecting units 202. It should be noted that... Figure 2 The diagram in the middle is a simplified structural diagram of the display substrate 2. Only the cutout area 203 is shown. The display unit 201 and the connection unit 202 are not shown in detail, but their positions are marked for illustration.

[0068] The shape of the cross section of the hollow area 203 along the direction parallel to the first base 21 is not limited in the embodiments of this application.

[0069] In this embodiment of the application, a first adhesive layer 12 and / or a first support portion 13 are included between the display unit 201 and the first back film layer 11;

[0070] For example, refer to Figure 1 Some display units 201 and the first back film layer 11 are bonded together by the first adhesive layer 12, and some display units 201 and the first back film layer 11 are connected together by the first support portion 13; or, refer to Figure 6 A first adhesive layer 12 and a first support portion 13 are included between the partial display unit 201 and the first back film layer 11.

[0071] The embodiments of this application do not specifically limit the portion of the display unit 201 that overlaps with the orthographic projection of the first adhesive layer 12 on the first back film layer 11;

[0072] In some embodiments, the orthographic projection of the first adhesive layer 12 on the first back film layer 11 and the orthographic projection of the first display unit 204 on the first back film layer 11 overlap, and the first adhesive layer 12 is annular.

[0073] In other embodiments, the orthographic projection of the first adhesive layer 12 on the first back film layer 11 and the orthographic projection of a portion of the second display unit 205 on the first back film layer 11 overlap, and the first adhesive layer 12 is located in a plurality of regions separated from each other.

[0074] The first display unit 204 is located at the edge of the array, and the second display unit 205 is located inside the array.

[0075] In this embodiment, the orthographic projection of the first adhesive layer 12 on the first back film layer 11 overlaps with the orthographic projection of a portion of the display unit 201 on the first back film layer 11.

[0076] For example, the orthographic projection of the first adhesive layer 12 onto the first back film layer 11 lies within the orthographic projection of the partial display unit 201 onto the first back film layer 11;

[0077] Alternatively, the orthographic projection of the first adhesive layer 12 on the first back film layer 11 coincides with the orthographic projection of a portion of the display unit 201 on the first back film layer 11.

[0078] In some embodiments, such as Figure 1 As shown, there is a gap 101 between the connecting unit 202 and the stretchable base 1.

[0079] In this embodiment, the protective substrate 3 is used to protect the display substrate 2;

[0080] In some embodiments, the protective substrate 3 includes a protective layer 33, which covers the display substrate 2 and is used to protect the display substrate 2.

[0081] In other embodiments, the protective substrate 3 includes an anti-reflective layer 31 that covers the display substrate 2 to reduce the reflection of ambient light.

[0082] This application provides a display panel. On one hand, the orthographic projection of the first adhesive layer 12 on the first back film layer 11 overlaps with the orthographic projection of a portion of the display units 201 on the first back film layer 11. Since the portion of the display units 201 is not bonded to the first back film layer 11 via the first adhesive layer 12, during the stretching process of the display panel, the display units 201 and connecting units 202 that are not in contact with the first adhesive layer 12 are not subjected to the adhesive force of the first adhesive layer 12. This makes the stretching process easier to achieve, avoiding film damage caused by the combined action of adhesive and tensile forces, reducing the probability of damage to the film layers in the display substrate 2 due to stress concentration, and improving the reliability of the display panel. On the other hand, the orthographic projection of the first support portion 13 on the first back film layer 11 overlaps with at least the orthographic projection of a portion of the display units 201 on the first back film layer 11. The first support portion 13 supports a portion of the display units 201, reducing the degree of deformation of this portion of the display units 201 in the direction perpendicular to the first back film layer 11 during the stretching process, and improving the reliability of the display panel.

[0083] In at least one embodiment of this application, combined with Figure 1 , Figure 3 and Figure 4 The first support portion 13 includes a plurality of first support units 131 spaced apart from each other; the orthographic projection of the first support unit 131 on the first back film layer 11 overlaps with the orthographic projection of a portion of the display unit 201 on the first back film layer 11.

[0084] In this embodiment of the application, the first support unit 131 is used to support the display unit 201.

[0085] In this embodiment of the application, preferably, the material of the first support unit 131 includes a high elastic modulus material; for example, the material of the first support unit 131 includes a metallic material; the elastic deformation of the high elastic modulus material is small, and the support effect is better.

[0086] In some embodiments, refer to Figure 1 In some embodiments, the orthographic projection of a first support unit 131 onto the first back film layer 11 lies within the orthographic projection of a display unit 201 onto the first back film layer 11; in other embodiments, reference is made to... Figure 6 In some embodiments, the orthographic projection of a portion of the first support unit 131 on the first back film layer 11 overlaps with the orthographic projection of a display unit 201 on the first back film layer 11; in other embodiments, the orthographic projection of a first support unit 131 on the first back film layer 11 covers the orthographic projection of a display unit 201 on the first back film layer 11. This application does not specifically limit this aspect.

[0087] The display panel provided in this application embodiment includes a first support portion 13 comprising a plurality of first support units 131 spaced apart from each other. The orthographic projection of the first support unit 131 on the first back film layer 11 overlaps with the orthographic projection of a portion of the display unit 201 on the first back film layer 11. The first support unit 131 can support this portion of the display unit 201, reducing the degree of deformation of the display unit 201 in the direction perpendicular to the first back film layer 11 during the stretching process, thereby improving the reliability of the display panel.

[0088] In at least one embodiment of this application, reference is made to Figure 1 The first support portion 13 also includes a first support layer 132, which is located between the first back film layer 11 and the first support unit 131; the orthographic projection of the first support unit 131 on the first back film layer 11 falls within the orthographic projection of the first support layer 132 on the first back film layer 11.

[0089] In this embodiment, the first support layer 132 is used to support the first support unit 131. Along the direction perpendicular to the first back film layer 11, the sum of the thicknesses of the first support layer 132 and the first support unit 131 is equal to the thickness of the first adhesive layer 12.

[0090] In some embodiments, refer to Figure 1 The first support layer 132 includes a third backsheet layer, which, in some other embodiments, refers to... Figure 6 The first support layer 132 includes a second substrate;

[0091] When the first support layer 132 includes a third back film layer, when preparing the stretchable substrate 11, the first back film layer 11 is first formed, then the first adhesive layer 12 and the third back film layer are formed on the first back film layer 11, and then the first support unit 131 is prepared on the third back film layer.

[0092] When the first support layer 132 includes a second substrate, when preparing the stretchable substrate 11, the second substrate is first formed, then the first support unit 131 is formed on the second substrate, and then the first back film layer 11 is attached to the side of the second substrate away from the first support unit 131.

[0093] In this embodiment, the first support layer 132 is located between the first back film layer 11 and the first support unit 131, which can reduce the thickness of the first support unit 131 and reduce the difficulty of preparing the first support unit 131.

[0094] In at least one embodiment of this application, reference is made to Figure 4 The first adhesive layer 12 has an annular shape as its orthographic projection onto the first back film layer 11; the first support portion 13 has its orthographic projection onto the first back film layer 11 falling within the area enclosed by the orthographic projection of the first adhesive layer 12 onto the first back film layer 11.

[0095] In this embodiment of the application, combined with Figure 1 and Figure 4 The orthographic projection of the first adhesive layer 12 on the first back film layer 11 and the orthographic projection of the first light-emitting unit on the first back film layer 11 overlap at least partially, wherein the first display unit 204 is located at the edge of the array arrangement;

[0096] In some embodiments, refer to Figure 1 The orthographic projection of the first support unit 131 on the first back film layer 11 and the orthographic projection of the second light-emitting unit on the first back film layer 11 at least partially overlap;

[0097] In other embodiments, reference is made to Figure 6 The orthographic projection of the first support unit 131 on the first back film layer 11 overlaps at least partially with the orthographic projections of the first light-emitting unit and the second light-emitting unit on the first back film layer 11.

[0098] In this embodiment, the first adhesive layer 12 has an annular shape as its orthographic projection onto the first back film layer 11. This reduces the probability of moisture seeping into the display substrate 2 from the first adhesive layer 12. Furthermore, during the stretching process of the display panel, the display unit 201 and the connecting unit 202, which are not in contact with the first adhesive layer 12, are not subjected to the adhesive force of the first adhesive layer 12. This makes the stretching process easier to implement, avoids film damage caused by the combined action of adhesive and tensile forces, and improves the reliability of the display panel.

[0099] In at least one embodiment of this application, reference is made to Figure 6 The display unit 201 includes a plurality of first display units 204; the orthographic projection of each first display unit 204 on the first back film layer 11 overlaps with the orthographic projection of the first adhesive layer 12 on the first back film layer 11; the orthographic projection of each first display unit 204 on the first back film layer 11 overlaps with the orthographic projection of the first support unit 131 on the first back film layer 11; and there is a gap 102 between the first support unit 131 and the first adhesive layer 12.

[0100] In this embodiment, the first display unit 204 is located at the edge of the array, and the first adhesive layer 12 forms a ring around the edge of the display unit 201 array.

[0101] The orthographic projection of the first display unit 204 can be divided into three parts: the first part is close to the edge of the array, the third part is close to the interior of the array, and the second part is located between the first part and the third part.

[0102] The first adhesive layer 12 has its orthographic projection on the first back film layer 11 overlapping with the first portion, and the first support unit 131 has its orthographic projection on the first back film layer 11 overlapping with the third portion.

[0103] In this embodiment, on the one hand, a portion of the first display unit 204 is in contact with the first adhesive layer 12, and another portion is in contact with the first support unit 131. This reduces the degree of deformation of this portion of the display unit in the direction perpendicular to the first back film layer during stretching, thereby improving the reliability of the display panel. On the other hand, there is a gap 102 between the first support unit 131 and the first adhesive layer 12, which reduces the probability of contact between the first support unit 131 and the first adhesive layer 12 during stretching, thereby reducing the probability of damage to the first support unit 131 and the first adhesive layer 12 due to contact, and improving the reliability of the display panel.

[0104] In at least one embodiment of this application, reference is made to Figure 7 The stretchable substrate 1 also includes:

[0105] The second back film layer 14 is located on the side of the first back film layer 11 away from the display substrate 2;

[0106] The second adhesive layer 15 is located between the second back film layer 14 and the first back film layer 11;

[0107] The second support portion 16 is located between the second back film layer 14 and the first back film layer 11;

[0108] The orthographic projection of the second adhesive layer 15 on the first back film layer 11 and the orthographic projection of the second support portion 16 on the first back film layer 11 do not overlap.

[0109] In this embodiment of the application, the second back film layer 14 includes at least one of a buffer protective layer 33 and a heat dissipation layer;

[0110] For example, the buffer protective layer 33 includes a flexible foam layer with high compressibility and high resilience, which can effectively protect the display substrate 2.

[0111] The heat dissipation layer includes a rolled copper layer, which is a copper layer that has been repeatedly rolled and stretched. It has good thermal conductivity and can achieve heat dissipation function.

[0112] In this embodiment, the second back film layer 14 is bonded to the display substrate 2 via the second adhesive layer 15.

[0113] The material of the second adhesive layer 15 is not limited in the embodiments of this application. For example, the material of the second adhesive layer 15 includes optical adhesive.

[0114] In this embodiment, the second support portion 16 is used to support the display unit 201 and prevent the display unit 201 from deforming along the line perpendicular to the second back film layer 14.

[0115] In some embodiments, the second support portion 16 is a single-layer structure; in other embodiments, the second support portion 16 is a multi-layer structure, and the embodiments of this application do not limit this.

[0116] This application does not specifically limit the material of the second support part 16. In some embodiments, part of the material of the second support part 16 includes metal material. Metal material has a large elastic modulus, small elastic deformation, and good support effect.

[0117] In some embodiments, there is a gap between the orthographic projection of the second adhesive layer 15 on the second back film layer 14 and the orthographic projection of the second support portion 16 on the second back film layer 14, so as to avoid contact damage between the second adhesive layer 15 and the second support portion 16 during the stretching of the stretchable substrate 1.

[0118] In some embodiments, the orthographic projection of the second adhesive layer 15 onto the second back film layer 14 is annular; the orthographic projection of the second support portion 16 onto the second back film layer 14 falls within the area enclosed by the orthographic projection of the second adhesive layer 15 onto the second back film layer 14.

[0119] In this embodiment, on one hand, the second adhesive layer 15 is located between the second back film layer 14 and the first back film layer 11; the second support portion 16 is located between the second back film layer 14 and the first back film layer 11; the orthographic projection of the second adhesive layer 15 on the first back film layer 11 and the orthographic projection of the second support portion 16 on the first back film layer 11 do not overlap, and part of the first back film layer 11 does not contact the second adhesive layer 15. During the stretching process of the display panel, the first back film layer that does not contact the second adhesive layer 15 is not subjected to the adhesive force of the second adhesive layer 15, making the stretching process easier to achieve and avoiding film damage caused by the combined action of adhesive force and stretching force, thereby improving the reliability of the display panel; on the other hand, the second support portion 16 supports part of the first back film layer 11, reducing the degree of deformation of this part of the first back film layer 11 in the direction perpendicular to the second back film layer 14 during the stretching process, thereby improving the reliability of the display panel.

[0120] In at least one embodiment of this application, reference is made to Figure 7 The second support portion 16 includes a second support unit 161 and a second support layer 162; the second support layer 162 is located on the side of the second back film layer 14 close to the first back film layer 11; the second support unit 161 is located on the side of the second support layer 162 close to the first back film layer 11; the orthographic projection of the second support unit 161 on the first back film layer 11 falls within the orthographic projection of the second support layer 162 on the first back film layer 11.

[0121] In this embodiment of the application, the second support unit 161 and the second support layer 162 are used to support the display unit 201.

[0122] Along the direction perpendicular to the second back film layer 14, the sum of the thicknesses of the second support layer 162 and the second support unit 161 is equal to the thickness of the second adhesive layer 15.

[0123] The material of the second support unit 161 includes a high elastic modulus material. For example, the material of the second support unit 161 includes a metal material. The elastic deformation of the high elastic modulus material is small, and the support effect is better.

[0124] In some embodiments, the second support portion 16 includes a plurality of second support units 161 spaced apart from each other, and the stretchable substrate 1 has a better stretching effect; in other embodiments, the second support portion 16 includes a single second support unit 161, and the manufacturing cost of the second support unit 161 is low.

[0125] The function of the second support layer 162 can be the same as that of the second back film layer 14. For example, both the second support layer 162 and the second back film layer 14 can include a buffer protective layer 33; or, the functions of the second support layer 162 and the second back film layer 14 can be different. For example, the second support layer 162 includes a buffer protective layer 33, and the second back film layer 14 includes a heat dissipation layer. This application does not specifically limit the specific functions of the second support layer 162.

[0126] In this embodiment, the second support unit 161 can support part of the display unit 201, reducing the deformation of the display unit 201 in the direction perpendicular to the second back film layer 14 during the stretching process, and improving the reliability of the display panel; the second support layer 162 is located between the second back film layer 14 and the second support unit 161, which can reduce the thickness of the second support unit 161 and reduce the cost of manufacturing the second support unit 161.

[0127] In at least one embodiment of this application, reference is made to Figure 1 There is a gap 101 between the connecting unit 202 and the stretchable base 1.

[0128] In some embodiments, the first support portion 13 includes a plurality of first support units 131, and there is a gap 101 between the connecting unit 202 and the first back film layer 11 of the stretchable substrate 1.

[0129] In some other embodiments, the first support portion 13 includes a first support unit 131 and a first support layer 132, and there is a gap 101 between the connecting unit 202 and the first support layer 132.

[0130] In this embodiment, there is a gap 101 between the connecting unit 202 and the stretchable substrate 1. In this way, the stress on the connecting unit 202 is small during the stretching process of the display panel, the probability of damage to the connecting unit 202 is low, and the reliability of the display panel is good.

[0131] In at least one embodiment of this application, the protective substrate 3 includes an anti-reflective layer 31 covering the display substrate 2, a protective layer 33 covering the anti-reflective layer 31, and a third adhesive layer 32 between the anti-reflective layer 31 and the protective layer 33.

[0132] Among them, reference Figure 1 or Figure 7 The orthographic projection of the anti-reflective layer 31 on the first back film layer 11 overlaps with the orthographic projection of the display substrate 2 on the first back film layer 11.

[0133] Or, refer to Figure 5 or Figure 8 The orthographic projection of the antireflective layer 31 onto the first back film layer 11 coincides with the first back film layer 11.

[0134] In this embodiment of the application, the anti-reflection layer 31 is used to reduce the reflectivity of the display panel to ambient light. For example, the anti-reflection layer 31 includes a color filter or a circular polarizer.

[0135] The color filter layer can be patterned to form a hollow structure, which protects the substrate 3 and improves its tensile properties. The orthographic projection of the color filter layer on the first back film layer 11 and the orthographic projection of the display substrate 2 on the first back film layer 11 overlap.

[0136] The circular polarizer is attached to the entire surface of the display substrate 2. The manufacturing process is simple and the manufacturing cost is low. The orthogonal projection of the circular polarizer on the first back film layer 11 coincides with the first back film layer 11.

[0137] The material of the third adhesive layer 32 is not limited in the embodiments of this application. For example, the material of the third adhesive layer 32 includes optical adhesive.

[0138] In some embodiments, the protective layer 33 includes at least one protective sublayer;

[0139] For example, protective layer 33 includes a protective sublayer, which, for instance, includes an organic or inorganic protective sublayer;

[0140] For example, protective layer 33 may include multiple protective sublayers. For instance, protective layer 33 may include at least one organic protective sublayer and at least one inorganic protective sublayer, multiple inorganic protective sublayers, or multiple organic protective sublayers.

[0141] The display panel provided in this application embodiment includes a protective substrate 3 comprising an anti-reflective layer 31 covering the display substrate 2, a protective layer 33 covering the anti-reflective layer 31, and a third adhesive layer 32 between the anti-reflective layer 31 and the protective layer 33. This can reduce the reflection of ambient light by the display panel and improve the display effect. In addition, the orthographic projection of the anti-reflective layer 31 on the first back film layer 11 overlaps with the orthographic projection of the display substrate 2 on the first back film layer 11. The anti-reflective layer 31 includes multiple hollow areas 203, which improves the tensile strength of the display panel. Alternatively, the orthographic projection of the anti-reflective layer 31 on the first back film layer 11 coincides with the first back film layer 11. The manufacturing cost of the anti-reflective layer 31 is low, which reduces the manufacturing cost of the display panel.

[0142] This application provides a display device, including the display panel described above.

[0143] For example, the display device includes any one of OLED display device, Micro OLED microdisplay device, and Mini LED microdisplay device.

[0144] The touch display device can be a touch display panel, or any product or component with display function, such as a television, digital camera, mobile phone, or tablet computer, that includes such a touch display panel. The display device provided in this application embodiment has a low damage rate of the film layer during stretching, resulting in high reliability.

[0145] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display panel, characterized in that, include: A stretchable substrate includes a first back film layer, a first adhesive layer and a first support portion located on the first back film layer; The orthographic projection of the first adhesive layer on the first back film layer and the orthographic projection of the first support portion on the first back film layer do not overlap; The display substrate, located on the side of the first adhesive layer and the first support portion away from the first back film layer, includes a plurality of display units spaced apart from each other, a connecting unit located between two adjacent display units, and a cutout area located between the display units and the connecting unit; Protective substrate, covering the display substrate; Wherein, the orthographic projection of the first adhesive layer on the first back film layer overlaps with the orthographic projection of a portion of the display unit on the first back film layer, and the orthographic projection of the first support portion on the first back film layer overlaps with at least a portion of the orthographic projection of the display unit on the first back film layer; The shape of the orthographic projection of the first adhesive layer onto the first back film layer is annular; The orthographic projection of the first support portion onto the first back film layer falls within the area enclosed by the orthographic projection of the first adhesive layer onto the first back film layer.

2. The display panel according to claim 1, characterized in that, The first support portion includes a plurality of first support units spaced apart from each other; the orthographic projection of the first support unit on the first back film layer overlaps with the orthographic projection of a portion of the display unit on the first back film layer.

3. The display panel according to claim 2, characterized in that, The first support portion further includes a first support layer, which is located between the first back film layer and the first support unit; The orthographic projection of the first support unit on the first back film layer falls within the orthographic projection of the first support layer on the first back film layer.

4. The display panel according to claim 3, characterized in that, The display unit includes a plurality of first display units; a portion of the orthographic projection of each first display unit on the first back film layer overlaps with the orthographic projection of the first adhesive layer on the first back film layer; a portion of the orthographic projection of each first display unit on the first back film layer overlaps with the orthographic projection of the first support unit on the first back film layer; There is a gap between the first support unit and the first adhesive layer.

5. The display panel according to claim 1, characterized in that, The stretchable substrate further includes: The second back film layer is located on the side of the first back film layer away from the display substrate; The second adhesive layer is located between the second back film layer and the first back film layer; The second support portion is located between the second back film layer and the first back film layer; The orthographic projection of the second adhesive layer on the first back film layer and the orthographic projection of the second support portion on the first back film layer do not overlap.

6. The display panel according to claim 5, characterized in that, The second support portion includes a second support unit and a second support layer; The second support layer is located on the side of the second back film layer closest to the first back film layer; The second support unit is located on the side of the second support layer closest to the first back film layer; The orthographic projection of the second support unit on the first back film layer falls within the orthographic projection of the second support layer on the first back film layer.

7. The display panel according to claim 1, characterized in that, There is a gap between the connecting unit and the stretchable substrate.

8. The display panel according to claim 1, characterized in that, The protective substrate includes an anti-reflective layer covering the display substrate, a protective layer covering the anti-reflective layer, and a third adhesive layer located between the anti-reflective layer and the protective layer; Wherein, the orthographic projection of the anti-reflective layer on the first back film layer and the orthographic projection of the display substrate on the first back film layer overlap. Alternatively, the orthographic projection of the antireflective layer onto the first backing layer coincides with the first backing layer.

9. A display device, characterized in that, Includes the display panel as described in any one of claims 1-8.

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