Supporting structure, flexible display module and display device

Abstract

The invention provides a supporting structure, a flexible display module and a display device, and the supporting structure comprises a supporting body which is provided with a first surface and a second surface which are oppositely arranged; the first bonding layer is arranged on the first surface; wherein the supporting body is provided with a plurality of open holes, and the opening area of the open holes in the first surface is smaller than that of the open holes in the second surface. The supporting structure provided by the embodiment of the invention can give consideration to supporting performance and bending performance, and is suitable for display modules with various special-shaped designs.

Description

Technical Field

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

[0002] With the development of display technology, organic light emitting diode (OLED) devices are increasingly being used in flexible display products such as high-end mobile devices, wearable devices, virtual reality display devices, augmented reality display devices, etc. due to their advantages such as self-luminescence, light weight, thin thickness, high color gamut, fast response speed, and flexibility.

[0003] Therefore, flexible display products need to have the characteristics of flexibility, support, lightness and thinness. Summary of the Invention

[0004] In order to solve the above problems, embodiments of the present application provide a support structure, a flexible display module, and a display device.

[0005] In a first aspect, an embodiment of the present application provides a support structure, comprising: a support body, the support body having a first surface and a second surface arranged opposite to each other; a first adhesive layer, arranged on the first surface; wherein, a plurality of openings are arranged on the support body, and the opening area of ​​the openings on the first surface is smaller than the opening area of ​​the openings on the second surface.

[0006] In combination with the first aspect, the aperture of the opening gradually increases in the direction from the first surface to the second surface; preferably, on the section passing through the geometric center of the opening on the first surface and parallel to the thickness direction of the supporting body, the cross-sectional shape of the opening is a trapezoid; preferably, the orthographic projection of the opening on the first surface or the second surface includes a circle, an ellipse, a triangle, a regular quadrilateral, a regular hexagon, or a regular octagon; preferably, the plurality of openings are evenly distributed on the supporting body; preferably, the aperture of the opening is greater than or equal to 0.01 mm and less than or equal to 0.2 mm; preferably, the aperture of the opening on the first surface is greater than or equal to 0.01 mm and less than or equal to 0.07 mm; and / or, the aperture of the opening on the second surface is greater than or equal to 0.05 mm and less than or equal to 0.2 mm.

[0007] In combination with the first aspect, the opening is filled with a thermally conductive material; preferably, the thermal conductivity of the thermally conductive material is greater than or equal to 400 W / (m·K) and less than or equal to 1500 W / (m·K); preferably, the modulus of the thermally conductive material is greater than or equal to 150 GPa and less than or equal to 300 GPa; preferably, the thermally conductive material includes at least one of graphite, graphene, and carbon nanotubes; preferably, the support structure further includes a functional layer, and the functional layer is located on the second surface.

[0008] In combination with the first aspect, the support structure further includes a functional layer, which is located on the second surface; preferably, the functional layer includes a conductive layer or an insulating layer; preferably, the material of the conductive layer includes conductive cloth; and / or, the material of the insulating layer includes polymethyl methacrylate or polyethylene terephthalate; preferably, the thickness of the conductive layer is greater than or equal to 30 microns and less than or equal to 50 microns; preferably, the thickness of the insulating layer is greater than or equal to 30 microns and less than or equal to 50 microns.

[0009] In combination with the first aspect, the functional layer includes a first heat-conducting layer; or, the functional layer includes a second heat-conducting layer; or, the functional layer includes a first heat-conducting layer and a second heat-conducting layer, and the first heat-conducting layer is located between the second heat-conducting layer and the supporting body; wherein the first heat-conducting layer is a micro heat pipe array and the second heat-conducting layer is a heat spreader; preferably, the thickness of the first heat-conducting layer is greater than or equal to 0.2 mm and less than or equal to 0.8 mm; and / or, the thickness of the second heat-conducting layer is greater than or equal to 0.2 mm and less than or equal to 0.8 mm.

[0010] In combination with the first aspect, the material of the support body includes a metal material; preferably, the modulus of the support body is greater than or equal to 150 GPa and less than or equal to 300 GPa; preferably, the material of the support body includes stainless steel; preferably, the thickness of the support body is greater than or equal to 30 microns and less than or equal to 100 microns.

[0011] In combination with the first aspect, the support structure also includes a first protective layer and a second protective layer, the first protective layer is arranged on the side of the first adhesive layer away from the support body; the second protective layer is arranged on the side of the second surface; preferably, the support structure also includes a functional layer, which is located between the second protective layer and the support body.

[0012] In the second aspect, an embodiment of the present application also provides a flexible display module, including: a display panel, the display panel having a light-emitting side and a non-light-emitting side; a supporting structure, the supporting structure including the above-mentioned supporting structure, the supporting structure is arranged on the non-light-emitting side, and the first adhesive layer is used to bond the supporting body and the display panel.

[0013] In combination with the second aspect, the flexible display module further includes a polarizing layer and a cover plate, which are sequentially stacked on the light-emitting side, and the polarizing layer and the display panel are bonded via a second adhesive layer; preferably, the display panel is bendable or curlable.

[0014] In a third aspect, the present application further provides a display device comprising the above-mentioned flexible display module.

[0015] Through the above technical solution, by setting multiple openings on the supporting body, the rigidity of the supporting body can be reduced. When the supporting structure is used in a flexible display module, the bending stress can be reduced and the bendability of the flexible display module can be improved; secondly, the opening area on the side close to the display panel is smaller than the opening area on the side away from the display panel, which can provide better support for the display panel. During the bending process, the flatness of the display panel is better, and it is not easy to leave marks on the display panel, thereby enhancing the display effect of the display panel; in addition, since the supporting body can provide better support, the supporting body can be designed to be thinner to achieve the requirements of lightness and thinness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the support structure provided in one embodiment of the present application.

[0017] Figure 2a and Figure 2b They are respectively schematic top views of the supporting body provided in one embodiment of the present application.

[0018] Figure 3 This is a schematic cross-sectional view of a support structure provided in another embodiment of the present application.

[0019] Figure 4 This is a schematic cross-sectional view of a support structure provided in another embodiment of the present application.

[0020] Figure 5 This is a schematic cross-sectional view of a support structure provided in another embodiment of the present application.

[0021] Figure 6 This is a schematic cross-sectional view of a support structure provided in another embodiment of the present application.

[0022] Figure 7 This is a schematic cross-sectional view of a support structure provided in another embodiment of the present application.

[0023] Figure 8 Schematic diagram of the cross-sectional structure of a flexible display module provided in one embodiment of the present application.

[0024] Figure 9 2 is a schematic structural diagram of a display device provided in one embodiment of the present application.

[0025] Description of reference numerals: 100. Support structure; 110. Support body; 111. First surface; 112. Second surface; 113. Opening; 120. First adhesive layer; 131. First protective layer; 132. Second protective layer; 140. Thermally conductive material; 150. Functional layer; 151. First thermally conductive layer; 152. Second thermally conductive layer; 200. Display panel; 210. Second adhesive layer; 300. Polarizing layer; 400. Cover plate; 900. Display device. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] Currently, the back support components of display panels mainly include support carrier frames (SCF), brackets (BKT), and stainless steel (SUS). Each of them has certain advantages, but it is difficult to simultaneously take into account multiple requirements such as flexibility, support, and lightness, and cannot meet the growing and diverse application scenarios of OLED display panels.

[0028] In view of this, an embodiment of the present application provides a support structure, which includes a support body and a first adhesive layer; the support body has a first surface and a second surface arranged relative to each other; the first adhesive layer is arranged on the first surface, wherein a plurality of openings are arranged on the support body, and the opening area of ​​the opening on the first surface is smaller than the opening area of ​​the opening on the second surface. In the embodiment of the present application, by arranging a plurality of openings on the support body, the rigidity of the support body can be reduced. When the support structure is used in a flexible display module, the bending stress can be reduced and the bendability of the flexible display module can be improved. Secondly, the opening area on the side close to the display panel is smaller than the opening area on the side away from the display panel, which can provide better support for the display panel. During the bending process, the flatness of the display panel is better, and it is not easy to leave marks on the display panel, thereby enhancing the display effect of the display panel. In addition, since the support body can provide better support, the support body can be designed to be thinner to achieve the requirements of lightness and thinness.

[0029] Figure 1 It is a schematic diagram of the cross-sectional structure of the support structure provided in one embodiment of the present application. Figure 2a and Figure 2b They are respectively schematic top views of the supporting body provided in one embodiment of the present application. Specifically, Figure 2ais a schematic diagram of a top view of the first surface 111 of the support body 110. Figure 2b 1 is a schematic diagram of a top view of the second surface 112 of the support body 110. Figure 1 As shown, the support structure 100 includes a support body 110 and a first adhesive layer 120. The support body 110 has a first surface 111 and a second surface 112 that are opposite to each other, and the first adhesive layer 120 is disposed on the first surface 111. A plurality of openings 113 are provided on the support body 110. Figure 1 、 Figure 2a and Figure 2b As shown, the opening area of ​​the opening 113 on the first surface 111 is smaller than the opening area of ​​the opening 113 on the second surface 112 .

[0030] Since the support body 110 has a certain rigidity, which is not conducive to bending, in an embodiment of the present application, in order to reduce the rigidity of the support body 110, an opening 113 is provided on the support body 110, which can reduce the rigidity of the support body 110. When the support structure 100 is used in a flexible display module, the bending stress can be reduced and the bendability of the flexible display module can be improved.

[0031] However, if the opening is too large, the support for the display panel will be reduced, and the display panel will easily leave marks when bent, resulting in poor display. In the embodiment of the present application, the first surface 111 is the side bonded to the display panel. Designing the opening 113 on the first surface 111 to have a smaller opening area can provide better support for the display panel, improve the flatness of the display panel during bending, and less likely to leave marks on the display panel, thereby enhancing the display effect of the display panel. Because the support body 110 can provide good support, the support body 110 can be designed to be thinner to meet the requirements of lightweight and thinness.

[0032] In some embodiments, the orthographic projection of the opening 113 on the first surface 111 or the second surface 112 includes a circle, an ellipse, a triangle, a regular quadrilateral, a regular hexagon, or a regular octagon, etc., preferably a circle. Optionally, when the orthographic projection of the opening 113 on the first surface 111 or the second surface 112 is a circle, the aperture of the opening 113 is the diameter of the circle. When the orthographic projection of the opening 113 on the first surface 111 or the second surface 112 is an ellipse, the aperture of the opening 113 is the major axis of the ellipse. When the orthographic projection of the opening 113 on the first surface 111 or the second surface 112 is a triangle, the aperture of the opening 113 is the diameter of the inscribed circle of the triangle. When the orthographic projection of the opening 113 on the first surface 111 or the second surface 112 is a regular quadrilateral, the aperture of the opening 113 is the diameter of the inscribed circle of the regular quadrilateral. When the orthographic projection of the opening 113 on the first surface 111 or the second surface 112 is a regular hexagon, the aperture of the opening 113 is the diameter of the inscribed circle of the regular hexagon. When the orthographic projection of the opening 113 on the first surface 111 or the second surface 112 is a regular octagon, the aperture of the opening 113 is the diameter of the inscribed circle of the regular octagon. In some embodiments, the orthographic projection of the opening 113 on the first surface 111 or the second surface 112 can also have other shapes, which are not limited in the embodiments of the present application.

[0033] In some embodiments, as Figure 2a and Figure 2b As shown, multiple openings 113 are evenly distributed on the support body 110. This can be applied to a variety of display products with special designs, such as foldable display products (e.g., foldable mobile phones), two-sided curved display products (e.g., two-sided curved screens), four-sided curved display products (e.g., four-sided curved screens), or rollable display products (e.g., smart watches).

[0034] In some embodiments, the plurality of openings 113 are unevenly distributed on the supporting body 110. For example, for a foldable display panel, the plurality of openings 113 are arranged in the folding area, and the non-folding area is not designed with openings 113. This can take into account both the bendability of the folding area and the support requirements of the non-folding area.

[0035] In some embodiments, the aperture of the opening 113 gradually increases in the direction from the first surface 111 to the second surface 112. Figure 1 As shown, in a cross section passing through the geometric center of the first surface of the opening 113 and parallel to the thickness direction of the support body 110, the cross-sectional shape of the opening 113 is a trapezoid. In this case, the aperture of the opening 113 changes gradually, and the sidewalls of the opening 113 have no abrupt changes or corners, which can avoid stress concentration and improve the strength of the support body 110.

[0036] In some embodiments, as Figure 3As shown, in a cross section passing through the geometric center of the first surface of the opening 113 and parallel to the thickness direction of the support body 110, the cross-sectional shape of the opening 113 is an inverted funnel. In the direction from the first surface 111 to the second surface 112, the aperture of the opening 113 remains unchanged in the first stage, and gradually increases in the second stage. This can improve the support structure 100's ability to support the display panel. However, at the junction of the first and second stages, the sidewalls of the opening have a corner, which is prone to stress concentration and reduces the strength of the support body 110.

[0037] In some embodiments, as Figure 4 As shown, on the cross section passing through the geometric center of the opening 113 on the first surface and parallel to the thickness direction of the support body 110, the cross-sectional shape of the opening 113 is two rectangles with different widths. In the direction from the first surface 111 to the second surface 112, in the first stage, the aperture of the opening 113 remains unchanged, and in the second stage, the aperture of the opening 113 remains unchanged, which can reduce the difficulty of preparation; at the junction of the first stage and the second stage, the aperture of the opening 113 becomes larger, that is, there is a mutation in the side wall of the opening 113, where stress concentration is likely to occur, reducing the strength of the support body 110.

[0038] It should be noted that in Figure 1 、 Figure 3 and Figure 4 In the embodiment shown, the line connecting the geometric center of the opening 113 on the first surface and the geometric center of the second surface is perpendicular to the support body 110. In some embodiments, the line connecting the geometric center of the opening 113 on the first surface and the geometric center of the second surface may not be perpendicular to the plane where the support body 110 is located, that is, the opening 113 is arranged at an angle.

[0039] In some embodiments, the aperture of the opening 113 is greater than or equal to 0.01 mm and less than or equal to 0.2 mm, for example, 0.01 mm, 0.03 mm, 0.05 mm, 0.08 mm, 0.1 mm, 0.14 mm, 0.16 mm, 0.2 mm. Specifically, the aperture of the opening 113 on the first surface 111 is greater than or equal to 0.01 mm and less than or equal to 0.07 mm, for example, 0.01 mm, 0.03 mm, 0.05 mm, 0.07 mm. In this way, the support structure 100 can ensure the support of the display panel. The aperture of the opening 113 on the second surface 112 is greater than or equal to 0.05 mm and less than or equal to 0.2 mm, for example, 0.05 mm, 0.08 mm, 0.1 mm, 0.13 mm, 0.15 mm, 0.18 mm, 0.2 mm. Designing a larger opening 113 on the second surface 112 can reduce the rigidity of the support structure 100 and improve bending performance.

[0040] In some embodiments, the support body 110 is made of a metal material. Optionally, the modulus of the support body 110 is greater than or equal to 150 GPa and less than or equal to 300 GPa, for example, 150 GPa, 200 GPa, 250 GPa, 300 GPa, etc. Optionally, the support body 110 is made of stainless steel (SUS). In the embodiment of the present application, the thickness of the support body 110 is greater than or equal to 30 microns and less than or equal to 100 microns, for example, the thickness of the support body 110 is 30 microns, 40 microns, 50 microns, 60 microns, 70 microns, 80 microns, 90 microns, 100 microns, etc. In the embodiment of the present application, the thin support body 110 can reduce the thickness of the display module, facilitating a thin and lightweight design of the display module.

[0041] like Figure 5 As shown, the support structure 100 also includes a first protective layer 131 and a second protective layer 132. The first protective layer 131 is disposed on the side of the first adhesive layer 120 facing away from the support body 110. The second protective layer 132 is disposed on the side of the second surface 112. In the embodiment of the present application, the first protective layer 131 and the second protective layer 132 are used to protect the support structure 100 from scratches or contamination during the production process. When the support structure 100 is bonded to the display panel, the first protective layer 131 is removed. When the display module is placed on the middle frame, the second protective layer 132 is removed.

[0042] In some embodiments, as Figure 6 As shown, to improve the heat dissipation effect of the display module, the opening 113 is filled with a thermally conductive material 140. Optionally, the thermal conductivity of the thermally conductive material 140 is greater than or equal to 400 W / (m·K) and less than or equal to 1500 W / (m·K), for example, 400 W / (m·K), 500 W / (m·K), 700 W / (m·K), 900 W / (m·K), 1000 W / (m·K), 1200 W / (m·K), 1500 W / (m·K), etc. Optionally, the modulus of the thermally conductive material 140 is greater than or equal to 150 GPa and less than or equal to 300 GPa, for example, 150 GPa, 170 GPa, 200 GPa, 250 GPa, 300 GPa, etc. The thermally conductive material 140 includes at least one of graphite, graphene, and carbon nanotubes. This can greatly improve the heat dissipation effect and ensure that the display module maintains good thermal stability during operation.

[0043] Because materials such as graphite, graphene, or carbon nanotubes are in powder form, both sides of the opening 113 need to be sealed to prevent the thermally conductive material 140 from scattering to other locations in the display module and causing contamination. In the embodiment of the present application, a first adhesive layer 120 is provided on the first surface 111, so the opening 113 on the first surface 111 can be sealed by the first adhesive layer 120. The second protective layer 132 on the second surface 112 will eventually peel away from the support structure 100, so an additional film layer is required on the second surface 112 to seal the opening 113 on the second surface 112.

[0044] like Figure 6 As shown, the support structure 100 further includes a functional layer 150, which is located on the second surface 112. Specifically, the functional layer 150 is located between the second protective layer 132 and the support body 110. Optionally, the functional layer 150 includes an insulating layer. The material of the insulating layer includes polymethyl methacrylate (PMMA) or polyethylene terephthalate (PET). In the embodiment of the present application, the opening 113 of the second surface 112 can be sealed by providing an insulating layer to prevent the thermal conductive material 140 in the opening 113 from escaping and causing contamination. Optionally, the thickness of the insulating layer is greater than or equal to 30 microns and less than or equal to 50 microns. For example, the thickness of the insulating layer is 30 microns, 35 microns, 40 microns, 45 microns, 50 microns, etc.

[0045] Optionally, the functional layer 150 includes a conductive layer. Optionally, the conductive layer is made of conductive fabric. Optionally, the thickness of the conductive layer is greater than or equal to 30 microns and less than or equal to 50 microns, for example, the thickness of the conductive layer is 30 microns, 35 microns, 40 microns, 45 microns, 50 microns, etc. Providing a conductive layer can, on the one hand, block the openings 113 on the second surface 112; on the other hand, the conductive layer can conduct static electricity, improving the antistatic performance of the display panel. Optionally, the functional layer 150 can include both a conductive layer and an insulating layer, with the insulating layer located between the conductive layer and the support body 110.

[0046] In some embodiments, in order to further improve the heat dissipation effect, the functional layer 150 can be set as a heat dissipation layer. Optionally, the functional layer 150 includes a first heat-conducting layer 151, and the first heat-conducting layer 151 is a micro heat pipe array (Micro Heat Pipe Array, MHPA). The micro heat pipe array is a flat array composed of independently connected micro heat pipes (for example, the heat pipe diameter is 0.2~3 microns), and the inner wall of each heat pipe has a micro groove group structure (for example, grooves), and the interior is filled with liquid (for example, water, acetone, methanol, etc.) and evacuated. Alternatively, the functional layer 150 includes a second heat-conducting layer 152, and the second heat-conducting layer 152 is a vapor chamber (Vapor Chamber, VC). The vapor chamber is a closed flat vacuum cavity, the inner wall of the cavity is covered with a capillary structure (for example, a copper powder sintered layer, a multi-layer copper mesh, etc.), and is filled with liquid (for example, water, acetone, etc.). Alternatively, as Figure 7 As shown, the functional layer 150 includes a first heat-conducting layer 151 and a second heat-conducting layer 152, with the first heat-conducting layer 151 located between the second heat-conducting layer 152 and the support body 110. In the embodiment of the present application, when the support structure 100 is used for a special-shaped display panel, the micro-heat pipe array can be arranged along the special-shaped contour to efficiently conduct heat. The heat spreader can further evenly disperse the heat, thereby improving the heat dissipation effect. However, providing the first heat-conducting layer 151 and the second heat-conducting layer 152 at the same time may increase the thickness of the display module, which cannot meet the requirements of lightweight and thinness.

[0047] Optionally, the thickness of the first heat-conducting layer 151 is greater than or equal to 0.2 mm and less than or equal to 0.8 mm. For example, the thickness of the first heat-conducting layer 151 is 0.2 mm, 0.5 mm, or 0.8 mm. The thickness of the second heat-conducting layer 152 is greater than or equal to 0.2 mm and less than or equal to 0.8 mm. For example, the thickness of the second heat-conducting layer 152 is 0.2 mm, 0.5 mm, or 0.8 mm.

[0048] An embodiment of the present application further provides a flexible display panel, and the flexible display module includes the support structure in the above embodiment.

[0049] Figure 8 FIG is a schematic diagram of the cross-sectional structure of a flexible display module provided in one embodiment of the present application. Figure 8 As shown, the flexible display module includes a display panel 200 and a supporting structure 100 .

[0050] Optionally, the display panel 200 has a light-emitting side and a non-light-emitting side. The support structure 100 is disposed on the non-light-emitting side. Optionally, the first adhesive layer 120 is used to bond the support body 110 and the display panel 200. Specifically, when the support structure 100 and the display panel 200 are bonded together, the first protective layer 131 on the support structure 100 is removed.

[0051] Since the support body 110 in the embodiment of the present application is provided with a plurality of openings 113, and the opening area of ​​the opening 113 on the side close to the display panel 200 is smaller than the opening area of ​​the opening 113 on the side away from the display panel 200, both support and bendability can be taken into account. Providing the openings 113 on the support body 110 can reduce the rigidity of the support body 110. When the support structure 100 is used in a flexible display module, the bending stress can be reduced and the bendability of the flexible display module can be improved. Designing the openings 113 on the first surface 111 to have a smaller opening area can provide better support for the display panel 200. During the bending process, the flatness of the display panel 200 is better, and it is not easy to leave marks on the display panel 200, thereby enhancing the display effect of the display panel 200. Since the support body 110 can provide better support, the support body 110 can be designed to be thinner to meet the overall lightness and thinness requirements.

[0052] In this embodiment of the present application, the display panel 200 is a flexible display panel that is foldable or rollable. For example, for a foldable display product (e.g., a foldable phone), the display panel 200 includes a folding region along which the display panel 200 can be folded. For another example, for a wearable display product (e.g., a smartwatch), the display panel 200 can be rolled along a fixed direction. In this embodiment of the present application, by providing an opening 113 in the support body 110, a variety of display panel 200 shapes can be accommodated.

[0053] Continue to refer Figure 8 The flexible display module further includes a polarizing layer 300 and a cover plate 400. The polarizing layer 300 and the cover plate 400 are sequentially stacked on the light-emitting side, and the polarizing layer 300 and the display panel 200 are bonded together via a second adhesive layer 210.

[0054] In some embodiments, a display panel includes a substrate, a pixel definition layer, a light emitting device layer, and an encapsulation layer.

[0055] Optionally, the substrate includes a backing and a circuit layer (not shown) formed on the backing. In the embodiment of the present application, the backing is a flexible substrate, such as polyethylene terephthalate (PET), polyimide (PI), or polyethylene naphthalate (PEN). The circuit layer may include multiple wiring layers and a dielectric layer separating the wiring layers, and pixel circuits may be formed in the circuit layer.

[0056] The pixel definition layer is located on one side of the substrate and is provided with a plurality of pixel openings. Optionally, the pixel definition layer is formed of an organic material or an inorganic material. It will be appreciated that the pixel definition layer is primarily used to define the positions of the pixel openings. In some cases, if the pixel openings can be defined by other means, the pixel definition layer may be omitted.

[0057] The light-emitting device layer is located on one side of the substrate and includes a plurality of light-emitting units. Optionally, at least a portion of the light-emitting unit is located within the pixel opening. The light-emitting unit includes a first electrode, a light-emitting functional layer, and a second electrode stacked in a direction away from the substrate. The pixel opening exposes a portion of the first electrode.

[0058] In an embodiment of the present application, the first electrode comprises an anode, and the second electrode comprises a cathode; alternatively, the first electrode comprises a cathode, and the second electrode comprises an anode. The first electrode may comprise a multilayer structure, for example, comprising a reflective layer and a pair of conductive oxide layers covering the upper and lower surfaces of the reflective layer, respectively. The reflective layer can be formed using, for example, a metal material with excellent light reflectivity, such as silver (Ag), aluminum (Al), or gold (Au). The conductive oxide layer can be formed using, for example, a transparent conductive oxide, such as indium tin oxide (ITO), indium zinc oxide (IZO), or indium gallium zinc oxide (IGZO). The second electrode is a semi-transmissive, semi-reflective electrode, and the material of the second electrode may include a single metal material, such as aluminum (Al), silver (Ag), or magnesium (Mg), or an alloy comprising any of these materials, such as magnesium-silver alloy (MgAg) or aluminum-lithium alloy (AlLi). In some cases, the thickness of the second electrode is relatively thin, so that the second electrode has both conductivity and light transmittance, thereby making the light emitted by the light-emitting functional layer partially transmitted and partially reflected. In this way, an optical microcavity is formed between the first electrode and the second electrode, and the microcavity effect can enhance the light output efficiency at a positive viewing angle.

[0059] In an embodiment of the present application, the light-emitting functional layer includes a plurality of stacked film layers. Optionally, the light-emitting functional layer includes at least one of a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer.

[0060] To enable the light-emitting functional layer to emit light, a pixel voltage is applied to the first electrode and a common voltage is applied to the second electrode, respectively. This creates a potential difference between the first electrode and the second electrode, causing the light-emitting functional layer disposed therebetween to emit light. For example, if a potential difference is formed between the first electrode and the second electrode of a blue light-emitting unit, the light-emitting functional layer emits blue light; if a potential difference is formed between the first electrode and the second electrode of a green light-emitting unit, the light-emitting functional layer emits green light; and if a potential difference is formed between the first electrode and the second electrode of a red light-emitting unit, the light-emitting functional layer emits red light.

[0061] In an embodiment of the present application, the encapsulation layer is located on the side of the light-emitting device layer facing away from the substrate. Optionally, the encapsulation layer includes an inorganic film layer and an organic film layer stacked in sequence. For example, the encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked in sequence away from the substrate. Optionally, the material of the first and second inorganic encapsulation layers includes at least one of silicon oxide, silicon nitride, silicon oxynitride, and aluminum oxide. The material of the organic encapsulation layer includes acrylic resin, polyorganosiloxane, etc.

[0062] In some embodiments, the display panel further includes a filter layer located on the side of the encapsulation layer facing away from the substrate. Optionally, the filter layer includes a plurality of color-resistance units and a retaining wall structure disposed between adjacent color-resistance units. The orthographic projections of the color-resistance units on the substrate overlap with the orthographic projections of the light-emitting units on the substrate. For example, the orthographic projections of the color-resistance units on the substrate overlap with the orthographic projections of the light-emitting units on the substrate. Providing the filter layer can improve the light purity of the display panel.

[0063] An embodiment of the present application further provides a display device, which includes the flexible display module in the above embodiment.

[0064] Figure 9 Schematic diagram of the structure of a display device provided by an embodiment of the present application. Figure 9 As shown, the display device 900 is a product with an image display function. For example, the display device 900 can be used to display static images, such as pictures or photos. The display device 900 can also be used to display dynamic images, such as videos.

[0065] The display device 900 can be a laptop computer, a mobile phone, a handheld or portable computer, a camera, a video camera, a vehicle-mounted smart central control screen, a calculator, a smart watch, a GPS navigator, an electronic photo, an electronic billboard or sign, a projector, etc.

[0066] The display device 900 includes the flexible display module provided by any of the above embodiments. The flexible display module includes a display panel, which may be an organic light emitting diode display panel or a quantum dot electroluminescent display panel.

[0067] In addition, the display device 900 may also have functions such as taking pictures, recording videos, fingerprint recognition, and face recognition. Accordingly, the display device 900 also includes at least one functional module for implementing the above functions, such as an under-screen camera, an under-screen fingerprint recognition sensor, etc.

[0068] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0069] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0070] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0071] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0072] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

[0073] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A support structure, characterized in that: include: A support body having a first surface and a second surface disposed opposite to each other; a first adhesive layer disposed on the first surface; Wherein, a plurality of openings are provided on the support body, and an opening area of ​​the openings on the first surface is smaller than an opening area of ​​the openings on the second surface.

2. The support structure according to claim 1, characterized in that In the direction from the first surface to the second surface, the aperture of the opening gradually increases.

3. The support structure according to claim 2, characterized in that On a cross section passing through the geometric center of the opening on the first surface and parallel to the thickness direction of the support body, the cross-sectional shape of the opening is a trapezoid.

4. The support structure according to claim 2, characterized in that The orthographic projection of the opening on the first surface or the second surface includes a circle, an ellipse, a triangle, a regular quadrilateral, a regular hexagon, or a regular octagon.

5. The support structure according to claim 2, characterized in that The plurality of openings are evenly distributed on the support body.

6. The support structure according to claim 2, characterized in that The aperture of the opening is greater than or equal to 0.01 mm and less than or equal to 0.2 mm.

7. The support structure according to claim 6, characterized in that The aperture of the opening on the first surface is greater than or equal to 0.01 mm and less than or equal to 0.07 mm; and / or the aperture of the opening on the second surface is greater than or equal to 0.05 mm and less than or equal to 0.2 mm.

8. The support structure according to claim 1, characterized in that The opening is filled with a heat-conducting material.

9. The support structure according to claim 8, characterized in that The thermal conductivity of the thermally conductive material is greater than or equal to 400 W / (m·K) and less than or equal to 1500 W / (m·K); and / or the modulus of the thermally conductive material is greater than or equal to 150 GPa and less than or equal to 300 GPa.

10. The support structure according to claim 8, characterized in that The thermally conductive material includes at least one of graphite, graphene, and carbon nanotubes.

11. The support structure according to claim 1, characterized in that The support structure further includes a functional layer located on the second surface.

12. The support structure according to claim 11, characterized in that The functional layer includes a conductive layer and / or an insulating layer.

13. The support structure according to claim 11, characterized in that The functional layer includes a first heat-conducting layer; or, the functional layer includes a second heat-conducting layer; or, the functional layer includes a first heat-conducting layer and a second heat-conducting layer, and the first heat-conducting layer is located between the second heat-conducting layer and the supporting body; wherein, the first heat-conducting layer is a micro heat pipe array, and the second heat-conducting layer is a heat spreader.

14. The support structure according to any one of claims 1 to 13, characterized in that The material of the supporting body includes metal material.

15. The support structure according to claim 14, characterized in that The modulus of the support body is greater than or equal to 150 GPa and less than or equal to 300 GPa.

16. The support structure according to claim 14, characterized in that The material of the support body includes stainless steel.

17. The support structure according to any one of claims 1 to 13, characterized in that The support structure further includes a first protective layer and a second protective layer. The first protective layer is arranged on the side of the first adhesive layer away from the support body; the second protective layer is arranged on the side of the second surface.

18. A flexible display module, characterized in that: include: A display panel, the display panel having a light-emitting side and a non-light-emitting side; A supporting structure, comprising the supporting structure according to any one of claims 1 to 17, wherein the supporting structure is arranged on the non-light-emitting side, and the first adhesive layer is used to bond the supporting body and the display panel.

19. The flexible display module according to claim 18, wherein: It also includes a polarizing layer and a cover plate, which are sequentially stacked on the light-emitting side, and the polarizing layer and the display panel are bonded together via a second adhesive layer.

20. A display device, characterized in that: Comprising the flexible display module according to claim 18 or 19.

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