Flexible display panel and display device

Abstract

The present invention provides a flexible display panel and a display device, wherein the flexible display panel comprises: a flexible substrate, comprising a first non-bending area, a second non-bending area, and a bending area arranged between the first non-bending area and the second non-bending area; the flexible substrate comprises a first surface and a second surface which are opposite to each other; a display layer, which is arranged on the first surface of the flexible substrate and is located in the first non-bending area; a protective layer, which is arranged on the first surface of the flexible substrate and covers the bending area; the protective layer comprises an adhesive and nanofibers dispersed in the adhesive. The protective layer of the present invention forms effective protection for the bending area, can play a role in bearing and transitioning bending stress, improves the bending performance and bending resistance time of the flexible display panel, reduces the risk of bending damage in the bending area, avoids poor display of the flexible display panel caused by bending stress, and optimizes the product stability, reliability and product yield of the flexible display panel and the display device.

Description

Technical Field

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

[0002] In recent years, in order to meet the diverse display needs, new display devices with different functions have emerged, bringing great convenience to people's lives and work. Intelligence, portability and flexibility are the main development directions of display devices. Organic Light-Emitting Diode (OLED) technology has the advantages of self-luminescence, fast response, wide viewing angle, high brightness, bright colors, and lightness, and is widely used in various types of displays.

[0003] With the further development of display technology, especially the popularity of handheld display devices, users have higher and higher requirements for screen-to-body ratio, which has promoted the development of narrow-frame design. With regard to the narrow-frame design currently on the market, flexible OLED products have great advantages over LCD products. The flexible screen can directly deform the frame area, and bend the part of the flexible substrate located at the lower frame position to the back of the display area, thereby reducing the width of the lower frame, achieving a narrow frame and increasing the screen-to-body ratio. However, in the bending of the display panel, the bending performance of the bending area is often poor and the panel yield is low, which affects the visualization effect of the flexible panel and the display device. Therefore, improving the product yield of flexible display panels is an urgent problem to be solved in this field. Summary of the invention

[0004] In order to improve the product yield of flexible display panels and develop display devices with better display effects, one of the objects of the present invention is to provide a flexible display panel, the flexible display panel comprising:

[0005] A flexible substrate, the flexible substrate comprising a first non-bending area, a second non-bending area, and a bending area arranged between the first non-bending area and the second non-bending area; the flexible substrate comprising a first surface and a second surface which are opposite to each other;

[0006] A display layer, the display layer is disposed on the first surface of the flexible substrate and is located in the first non-bending area;

[0007] A protective layer, the protective layer is disposed on the first surface of the flexible substrate and covers the bending area;

[0008] The protective layer includes an adhesive and nanofibers dispersed in the adhesive.

[0009] In the flexible display panel provided by the present invention, the first surface of the bending area of ​​the flexible substrate is covered with a protective layer, in which nanofibers are dispersed, which not only protect the bending area, but also the nanofibers can bear and transition bending stress, effectively improving the bending performance and bending resistance time of the flexible display panel, reducing the risk of bending damage in the bending area, thereby improving the product stability and yield of the flexible display panel and the display device.

[0010] Optionally, the mass percentage of nanofibers in the protective layer is 20-50%.

[0011] Optionally, the nanofibers are inorganic fibers and / or polymer fibers.

[0012] Optionally, the length of the nanofiber is 0.3-60 μm, and the diameter of the nanofiber is 30-80 nm.

[0013] Optionally, the adhesive is UV curing adhesive.

[0014] Optionally, the thickness of the protection layer covering the bending area is 20-70 μm.

[0015] Optionally, the protective layer covers the bending zone and extends to the first non-bending zone, and / or the protective layer covers the bending zone and extends to the second non-bending zone.

[0016] Optionally, along a direction parallel to the plane where the first non-bending zone is located and away from the bending zone, the width of the protective layer located in the first non-bending zone is 100-300 μm; and / or, along a direction parallel to the plane where the second non-bending zone is located and away from the bending zone, the width of the protective layer located in the second non-bending zone is 100-300 μm.

[0017] Optionally, along a direction parallel to the plane where the first non-bending zone is located and away from the bending zone, the thickness of the protective layer located in the first non-bending zone gradually decreases; and / or, along a direction parallel to the plane where the second non-bending zone is located and away from the bending zone, the thickness of the protective layer located in the second non-bending zone gradually decreases.

[0018] Optionally, the flexible display panel further includes a first supporting layer and a second supporting layer; the first supporting layer and the second supporting layer are both arranged on the second surface of the flexible substrate; the first supporting layer is located in the first non-bending area, and the second supporting layer is located in the second non-bending area.

[0019] Optionally, a first heat dissipation layer is provided on a side of the first supporting layer facing away from the flexible substrate, and / or a second heat dissipation layer is provided on a side of the second supporting layer facing away from the flexible substrate.

[0020] Optionally, the first heat dissipation layer is a metal layer, and / or the second heat dissipation layer is a foam layer.

[0021] A second object of the present invention is to provide a display device, comprising the flexible display panel as described in one of the objects.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In the flexible display panel provided by the present invention, the first surface of the bending area of ​​the flexible substrate is covered with a protective layer, and the protective layer includes an adhesive and nanofibers dispersed therein, which not only effectively protects the bending area, but also the nanofibers can bear and transition bending stress, thereby significantly improving the bending performance and bending resistance time of the flexible display panel, reducing the risk of bending damage in the bending area, avoiding poor display of the flexible display panel caused by bending stress at the stress concentration position, optimizing the product stability, reliability and product yield of the flexible display panel, and making the display device including the flexible display panel have better display effect and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a flexible display panel provided in one embodiment of the present invention;

[0025] Figure 2 A schematic structural diagram of a flexible display panel provided in another embodiment of the present invention;

[0026] Figure 3 A schematic structural diagram of a flexible display panel provided in another embodiment of the present invention;

[0027] Figure 4 A schematic structural diagram of a flexible display panel provided in another embodiment of the present invention;

[0028] Figure 5 A schematic structural diagram of a flexible display panel in a flat state provided in another embodiment of the present invention;

[0029] Figure 6 A schematic structural diagram of a flexible display panel provided in another embodiment of the present invention;

[0030] Figure 7 A schematic diagram of the protective layer in one embodiment of the present invention;

[0031] Figure 8 A schematic diagram of the structure of a display device provided in one embodiment of the present invention;

[0032] Among them, 10-flexible substrate, 11-first non-bending area, 12-second non-bending area, 13-bending area, 101-first surface, 102-second surface, 20-display layer, 30-protective layer, 41-first supporting layer, 42-second supporting layer, 51-first heat dissipation layer, 52-second heat dissipation layer, 60-flexible display panel. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0034] In the present invention, the features defined as "first" or "second" may include one or more of the features explicitly or implicitly, and are used to distinguish and describe the features, without distinction of order or importance. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0035] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "inside", "outside", "vertical", and "horizontal" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and should not be understood as limiting the present invention.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", "installed", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above-mentioned terms in the present invention can be understood according to specific circumstances.

[0037] After research, the present invention has found that when a traditional display panel is bent, stress is easily accumulated at the center of the bending angle, and bending deformation problems will occur, resulting in a greater risk of damage to the central area of ​​the flexible substrate and the adhesive layer in the bending area, thereby causing poor display, low product stability and yield problems.

[0038] The embodiment of the present invention provides a flexible display panel and a display device, wherein a protective layer is covered on the first surface of the bending area of ​​the flexible substrate, and the protective layer includes an adhesive and nanofibers dispersed in the adhesive. The design of the protective layer containing nanofibers effectively protects the bending area, and can play a role in bearing and transitioning bending stress, effectively improve the bending performance and bending resistance time of the flexible display panel, reduce the risk of bending damage in the bending area, and avoid poor display caused by bending stress at the stress concentration position of the flexible display panel, thereby improving the stability and yield of the flexible display panel and the display device, and solving the above problems.

[0039] In order to make the above-mentioned purpose, features and effects of the present invention more obvious, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0040] Figure 1 FIG. 1 is a schematic diagram of the structure of a flexible display panel provided in one embodiment of the present invention. Figure 1 As shown, the flexible display panel includes: a flexible substrate 10, the flexible substrate includes a first non-bending area 11, a second non-bending area 12, and a bending area 13 arranged between the first non-bending area 11 and the second non-bending area 12; the flexible substrate includes a first surface 101 and a second surface 102 that are opposite to each other; a display layer 20, the display layer 20 is arranged on the first surface 101 of the flexible substrate 10 and is located in the first non-bending area 11; a protective layer 30, the protective layer 30 is arranged on the first surface 101 of the flexible substrate 10 and covers the bending area 13. The protective layer 30 includes an adhesive and nanofibers dispersed in the adhesive.

[0041] Optionally, the material of the flexible substrate 10 is a flexible material, such as polyimide (PI), etc. After the display layer 20 is arranged on the flexible substrate 10, one side of the flexible substrate 10 is bent to the back side, that is, one side of the flexible substrate 10 is bent toward the second surface 102, thereby reducing the width of the frame, achieving a narrow frame, and connecting the wiring on the flexible substrate 10 to the driving circuit to drive the display layer 20.

[0042] Optionally, the display layer 20 includes an organic electroluminescent device and / or an organic electroluminescent device unit array, which emits light under the drive of a driving circuit to achieve display.

[0043] The flexible substrate 10 is divided into a first non-bending area 11 and a second non-bending area 12 which are not bent, and a bending area 13 which is bent according to the bending position; since the thickness of the flexible substrate 10 is very thin, a protective layer 30 is provided on the first surface 101 of the flexible substrate 10, so that the protective layer 30 covers the bending area 13 to effectively protect it.

[0044] The protective layer 30 is a coating formed by an adhesive and nanofibers, wherein the nanofibers are dispersed in the adhesive. Based on the large aspect ratio and good flexibility of the nanofibers, the nanofibers and the protective layer containing the nanofibers can bear and transition bending stress during the bending process, significantly improving the bending performance and bending resistance time of the flexible display panel, thereby reducing the risk of damage in the bending area, avoiding poor display of the flexible display panel caused by bending stress at the stress concentration position, so that the flexible display panel has excellent product stability, ensuring the yield of the flexible display panel, and thus achieving improved display effect.

[0045] Figure 2 FIG. 1 is a schematic diagram of the structure of a flexible display panel provided in another embodiment of the present invention. Figure 2 As shown, in Figure 1 Based on the embodiment shown, the flexible display panel also includes a first supporting layer 41 and a second supporting layer 42; the first supporting layer 41 and the second supporting layer 42 are both arranged on the second surface 102 of the flexible substrate 10; the first supporting layer 41 is located in the first non-bending area 11, and the second supporting layer 42 is located in the second non-bending area 12.

[0046] Figure 2 In the figure, the first supporting layer 41 and the second supporting layer 42 are arranged on the second surface of the flexible substrate 10, that is, on the non-display side; the first supporting layer 41 and the second supporting layer 42 respectively support the first non-bending area 11 and the second non-bending area 12, so that the flexible display panel has a certain rigidity and ensures that the flexible substrate and the flexible display panel maintain good operability and stability during bending, folding, etc.

[0047] Optionally, the first supporting layer and the second supporting layer are each independently a supporting film, which has a certain elastic modulus and strength to achieve a good supporting effect.

[0048] Optionally, the flexible display panel further includes a first heat dissipation layer and / or a second heat dissipation layer, and a first heat dissipation layer is provided on a side of the first supporting layer 41 facing away from the flexible substrate 10, and / or a second heat dissipation layer is provided on a side of the second supporting layer 42 facing away from the flexible substrate 10.

[0049] Figure 3 FIG. 1 is a schematic diagram of the structure of a flexible display panel provided in another embodiment of the present invention. Figure 3 As shown, in Figure 2Based on the embodiment shown, the flexible display panel further includes a first heat dissipation layer 51 and a second heat dissipation layer 52, wherein the first heat dissipation layer 51 is arranged on a side of the first supporting layer 41 away from the flexible substrate 10, and the second heat dissipation layer 52 is arranged on a side of the second supporting layer 42 away from the flexible substrate 10.

[0050] In some optional embodiments of the present invention, the first heat dissipation layer 51 is any one of a metal layer and a graphite layer, or a combination of at least two of them.

[0051] In some optional embodiments of the present invention, the first heat dissipation layer 51 is a metal layer, preferably a copper foil layer.

[0052] Optionally, the first heat dissipation layer 51 is arranged on the side of the first supporting layer 41 away from the flexible substrate 10, located in the first non-bending area 11; the first heat dissipation layer 51 is preferably a copper foil layer, which has good thermal conductivity properties, thereby effectively exerting the heat dissipation function.

[0053] In some optional embodiments of the present invention, the second heat dissipation layer 52 is a foam layer, which has good heat dissipation performance on one hand, and on the other hand, the foam layer has a certain buffering effect, which helps to improve the stability and yield of the flexible display panel.

[0054] In some optional embodiments of the present invention, the protective layer 30 covers the bending zone 13 and extends to the first non-bending zone 11 , and / or the protective layer 30 covers the bending zone 13 and extends to the second non-bending zone 12 .

[0055] like Figure 4 As shown, Figure 4 It is a schematic structural diagram of a flexible display panel provided in another embodiment of the present invention, wherein the protective layer 30 covers the bending area 13 and extends to the first non-bending area 11 , and the protective layer 30 covers the bending area 13 and extends to the second non-bending area 12 .

[0056] Since the stress at the connection between the non-bending area (the first non-bending area 11 and the second non-bending area 12) and the bending area 13 is relatively large, in order to relieve the stress here and avoid the problem of poor display caused by bending stress, the protective layer 30 covers the connection between the non-bending area and the bending area, and extends to the non-bending area, thereby effectively alleviating the bending stress at the connection position, further avoiding the risk of breakage during the bending process, avoiding poor display caused by stress concentration positions, and ensuring the stability, reliability and product yield of the flexible display panel.

[0057] Figure 5 FIG. 1 is a schematic structural diagram of a flexible display panel in a flat state provided in another embodiment of the present invention. Figure 5As shown, the flexible display panel is in a flat state before bending, and the protective layer 30 covers the bending area 13 and extends to the first non-bending area 11 and the second non-bending area 12, that is, the protective layer 30 covers the connection between the non-bending area and the bending area, and extends to the non-bending area. During the bending process, a certain degree of stress concentration will occur at the connection position between the bending area and the non-bending area. The protective layer covers the connection position, thereby alleviating and transitioning the bending stress at the location, avoiding damage during the bending process and poor display caused by stress concentration, so that the flexible display panel has excellent stability, reliability and product yield.

[0058] like Figure 5 As shown, in some optional embodiments of the present invention, along a direction parallel to the plane where the first non-bending zone is located and away from the bending zone, the width of the protective layer located in the first non-bending zone is d1, and the value of d1 is 100-300μm, for example, it can be 110μm, 130μm, 150μm, 170μm, 190μm, 200μm, 210μm, 230μm, 250μm, 270μm or 290μm; and / or, along a direction parallel to the plane where the second non-bending zone is located and away from the bending zone, In the plane and away from the bending zone, the width of the protective layer located in the second non-bending zone is d2, and the value of d2 is 100-300μm, for example, it can be 110μm, 130μm, 150μm, 170μm, 190μm, 200μm, 210μm, 230μm, 250μm, 270μm or 290μm, as well as specific point values ​​between the above point values. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the range.

[0059] Wherein, d1 and d2 represent the width of the protective layer extending in the non-bending area, and the width is 100-300μm, which can relieve and transition the bending stress at the connection between the bending area and the non-bending area, avoid the risk of breakage during the bending process and poor display caused by stress concentration, and improve the stability and product yield of the flexible display panel. If the width is less than 100μm, its stress relief effect on the connection between the bending area and the non-bending area is not obvious; if the width is greater than 300μm, it not only consumes more protective layer materials, resulting in increased costs, but also disperses the stress relief effect to other positions in the non-bending area, which is not conducive to the improvement of the screen-to-body ratio. Therefore, the width of the specific protective layer extending in the non-bending area can provide targeted and effective protection for the bending area of ​​the flexible substrate and the connection between the bending area and the non-bending area.

[0060] Figure 6 FIG. 1 is a schematic diagram of the structure of a flexible display panel provided in another embodiment of the present invention. Figure 6 As shown, along a direction parallel to the plane where the first non-bending area is located and away from the bending area (along Figure 6 The thickness of the protective layer in the first non-bending zone gradually decreases along the direction indicated by the arrow A in the middle; and / or the thickness of the protective layer in the second non-bending zone gradually decreases along the direction parallel to the plane where the second non-bending zone is located and away from the bending zone.

[0061] Optionally, the protective layer is arranged along the inner side of the non-bending area. Figure 6 The thickness in the direction indicated by the middle arrow A gradually decreases, so that there is no obvious "step" at the edge of the protective layer, which helps to improve the bonding strength and bonding stability between the protective layer and the flexible substrate, so that the protective layer can effectively protect the flexible substrate covered by it, thereby improving the reliability, stability and yield of the flexible display panel.

[0062] Alternatively, if Figure 1-Figure 4 and Figure 6 As shown, the bending area 13 has an arc-shaped structure.

[0063] Optionally, the bending radius of the bending zone 13 is 0.2-0.3mm, for example, it can be 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm or 0.29mm, as well as specific point values ​​between the above point values. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the range.

[0064] Optionally, the bending radius of the bending zone 13 is 0.2-0.25 mm.

[0065] In some optional embodiments of the present invention, the thickness of the protective layer covering the bending zone is 20-70μm, for example, it can be 25μm, 30μm, 35μm, 40μm, 45μm, 50μm, 55μm, 600μm or 65μm, as well as specific point values ​​between the above point values. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the range.

[0066] Optionally, the thickness of the protective layer is 20-70 μm, which can provide good protection for the flexible substrate, avoid damage caused by bending stress, and effectively improve the bending performance and bending resistance time of the flexible display panel. If its thickness is less than 20 μm, the too thin protective layer cannot effectively alleviate the bending stress problem in the bending area; if its thickness is greater than 70 μm, the too thick protective layer itself also has a certain rigidity, thereby causing new bending stress problems.

[0067] In some optional embodiments of the present invention, the mass percentage of nanofibers in the protective layer is 20-50%, for example, it can be 22%, 25%, 28%, 30%, 32%, 35%, 38%, 40%, 42%, 45% or 48%, as well as specific point values ​​between the above point values. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the said range.

[0068] Figure 7 is a schematic diagram of the protective layer in one embodiment of the present invention, as shown in Figure 7 As shown, the nanofibers are uniformly dispersed in the adhesive to form an adhesive-nanofiber composite layer.

[0069] Optionally, the mass percentage of nanofibers in the protective layer is 20-50%, and the specific content of nanofibers is evenly dispersed in the adhesive to form an adhesive-nanofiber composite coating with uniform performance, that is, the protective layer of the present invention. The nanofibers can play a role in bearing and transitioning bending stress during the bending process, thereby improving the bending performance and bending resistance time of the flexible display panel, reducing the risk of damage in the bending zone, and enabling the flexible display panel to have excellent product stability and yield.

[0070] If the mass percentage of nanofibers in the protective layer is too low, the effect of bearing and transition of bending stress is not obvious, and the effect of improving the bending performance and bending resistance time of the flexible display panel is not good. If the mass percentage of nanofibers in the protective layer is too high, on the one hand, it will increase the difficulty of dispersing nanofibers in the adhesive, and it will be difficult for nanofibers to be evenly dispersed in the adhesive, resulting in insufficient uniformity of the protective layer, which is not conducive to improving the bending performance; on the other hand, if the content of nanofibers is too high and the amount of adhesive is insufficient, it will affect the film-forming performance, making it difficult for the protective layer to effectively protect the bending area of ​​the flexible substrate.

[0071] In some optional embodiments of the present invention, the nanofibers are inorganic fibers and / or polymer fibers.

[0072] Optionally, the inorganic fiber includes any one of glass fiber, quartz fiber, asbestos fiber, or a combination of at least two of them.

[0073] Optionally, the polymer fibers include bio-based polymer fibers and / or synthetic fibers.

[0074] Optionally, the bio-based polymer fibers include plant fibers and / or animal fibers.

[0075] Optionally, the synthetic fibers illustratively include but are not limited to: any one or a combination of at least two of polyamide fibers, polyurethane fibers, aramid fibers, polyethylene terephthalate fibers, ultra-high molecular weight polyethylene fibers, polyimide fibers, and polyacrylonitrile fibers.

[0076] In some optional embodiments of the present invention, the length of the nanofiber is 0.3-60 μm, for example, it can be 0.5 μm, 0.8 μm, 1 μm, 3 μm, 5 μm, 8 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm or 55 μm, as well as specific point values ​​between the above point values. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the range.

[0077] In some optional embodiments of the present invention, the diameter of the nanofiber is 30-80nm, for example, it can be 35nm, 40nm, 45nm, 50nm, 55nm, 60nm, 65nm, 70nm or 75nm, as well as specific point values ​​between the above point values. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the range.

[0078] Optionally, the length of the nanofiber is 0.3-60 μm, and the diameter is 30-80 nm. It has a high aspect ratio and excellent flexibility, and can bear and transition bending stress, thereby improving the bending and stability of the protective layer, improving the bending performance and bending resistance time of the flexible display panel, reducing the risk of stress fracture in the bending area, and making the flexible display panel have better stability and yield. If the diameter of the nanofiber is too low, it will increase the difficulty of dispersing the nanofiber in the adhesive, increase the risk of agglomeration of the nanomaterial (nanofibers), and affect the uniformity of the performance of the protective layer; if the diameter of the nanofiber is too large or the length is too low, the aspect ratio of the nanofiber will be reduced, and it will not be able to effectively bear and transition bending stress, and the improvement effect on the bending performance of the display panel will not be obvious.

[0079] In some optional embodiments of the present invention, the adhesive is a UV curing adhesive.

[0080] In some optional embodiments of the present invention, the protective layer is prepared by the following method, which includes: mixing an adhesive and nanofibers and dispersing them evenly to form a coating; applying the coating to the bending area (the first surface of the flexible substrate) and curing it to obtain the protective layer.

[0081] Optionally, the coating also includes other additives that are beneficial to processing.

[0082] Optionally, the other auxiliary agents illustratively include but are not limited to: solvents, dispersants, silane coupling agents, etc.

[0083] Optionally, the coating method is spraying, and optionally, a solenoid spray valve process known in the art is used for uniform coating.

[0084] Optionally, the curing is UV curing, optionally using a UV process known in the art.

[0085] An embodiment of the present invention further provides a display device, Figure 8 It is a schematic structural diagram of a display device provided in one embodiment of the present invention, wherein the display device includes any one of the flexible display panels 60 provided in the embodiments of the present invention.

[0086] Since the display device adopts the above-mentioned flexible display panel 60, the display device also has the technical effect of the flexible display panel described in the above embodiment. It should be noted that the display device provided in the embodiment of the present invention may also include other circuits and devices for supporting the normal operation of the display device. The display device exemplarily includes but is not limited to: any one of a mobile phone, a tablet computer, an electronic photo frame, and an electronic paper.

[0087] The applicant declares that the present invention illustrates the flexible display panel and display device of the present invention through the above-mentioned embodiments, but the present invention is not limited to the above-mentioned process steps, that is, it does not mean that the present invention must rely on the above-mentioned process steps to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the raw materials selected by the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A flexible display panel, characterized in that: The flexible display panel comprises: A flexible substrate, the flexible substrate comprising a first non-bending area, a second non-bending area, and a bending area arranged between the first non-bending area and the second non-bending area; the flexible substrate comprising a first surface and a second surface which are opposite to each other; A display layer, the display layer is disposed on the first surface of the flexible substrate and is located in the first non-bending area; A protective layer, the protective layer is disposed on the first surface of the flexible substrate and covers the bending area; The protective layer includes an adhesive and nanofibers dispersed in the adhesive; The length of the nanofiber is 3-60 μm, and the diameter of the nanofiber is 30-80 nm; The bending radius of the bending zone is 0.2-0.3 mm.

2. The flexible display panel according to claim 1, characterized in that: The mass percentage of the nanofibers in the protective layer is 20-50%.

3. The flexible display panel according to claim 1, characterized in that: The nanofibers are inorganic fibers and / or polymer fibers.

4. The flexible display panel according to claim 1, characterized in that: The adhesive is UV curing adhesive.

5. The flexible display panel according to claim 1, characterized in that: The thickness of the protection layer covering the bending area is 20-70 μm.

6. The flexible display panel according to claim 1, characterized in that: The protective layer covers the bending area and extends to the first non-bending area, and / or the protective layer covers the bending area and extends to the second non-bending area.

7. The flexible display panel according to claim 6, characterized in that: Along a direction parallel to the plane where the first non-bending zone is located and away from the bending zone, the width of the protective layer located in the first non-bending zone is 100-300μm; and / or, along a direction parallel to the plane where the second non-bending zone is located and away from the bending zone, the width of the protective layer located in the second non-bending zone is 100-300μm.

8. The flexible display panel according to claim 6, characterized in that: Along a direction parallel to the plane where the first non-bending zone is located and away from the bending zone, the thickness of the protective layer located in the first non-bending zone gradually decreases; and / or, along a direction parallel to the plane where the second non-bending zone is located and away from the bending zone, the thickness of the protective layer located in the second non-bending zone gradually decreases.

9. The flexible display panel according to claim 1, characterized in that: The flexible display panel also includes a first supporting layer and a second supporting layer; the first supporting layer and the second supporting layer are both arranged on the second surface of the flexible substrate; the first supporting layer is located in the first non-bending area, and the second supporting layer is located in the second non-bending area.

10. The flexible display panel according to claim 9, characterized in that: A first heat dissipation layer is provided on a side of the first supporting layer facing away from the flexible substrate, and / or a second heat dissipation layer is provided on a side of the second supporting layer facing away from the flexible substrate.

11. The flexible display panel according to claim 10, characterized in that: The first heat dissipation layer is a metal layer, and / or the second heat dissipation layer is a foam layer.

12. A display device, characterized in that: The display device comprises the flexible display panel as described in any one of claims 1-11.

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