Flexible display device and method for manufacturing the same

Abstract

The present invention provides a flexible display device and a manufacturing method thereof. The flexible display device includes: a support layer; a flexible display panel, which is disposed on one side of the support layer and the back surface of the flexible display panel is disposed close to the support layer. The flexible display panel includes a display area and a non-display area. The display area includes a first flat area and a first curved area. The first curved area is disposed between the first flat area and the non-display area, and the first curved area is bent toward the support layer; a fixing layer, which is disposed on the side of the flexible display panel away from the support layer and corresponds to the display area. The fixing layer includes a second flat area and a second curved area. The orthographic projection of the second flat area on the flexible display panel overlaps with the first flat area, and the orthographic projection of the second curved area on the flexible display panel covers the first curved area, and the second curved area is attached to the first curved area. Thereby, the rebound force of the support layer is reduced, the flexible display panel is prevented from falling off, and the service life of the flexible display device is improved.

Description

Technical Field

[0001] The present application relates to the field of displays, and more particularly, to a flexible display device and a method for manufacturing the same. Background Art

[0002] In order to achieve folding and bending, the film layer material of a folding display device has a certain flexibility. To improve the mechanical strength of the display panel, a support layer is provided on the backlight side of the display panel. The support layer has a relatively large mechanical strength and a large resilience force, and the display panel and other film layer structures at the edge of the flexible display device are prone to peeling.

[0003] Therefore, the current flexible display device still needs to be further improved. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to some extent.

[0005] In one aspect of the present invention, a flexible display device is provided, including a support layer; a flexible display panel disposed on one side of the support layer with the back surface of the flexible display panel close to the support layer. The flexible display panel includes a display area and a non-display area. The display area includes a first flat area and a first curved area. The first curved area is disposed between the first flat area and the non-display area and bends toward the support layer; a fixing layer disposed on the side of the flexible display panel away from the support layer and corresponding to the display area. The fixing layer includes a second flat area and a second curved area. The orthographic projection of the second flat area on the flexible display panel overlaps with the first flat area, and the orthographic projection of the second curved area on the flexible display panel covers the first curved area. The second curved area is attached to the first curved area. That is to say, the second curved area of the fixing layer is similar in shape to the first curved area of the flexible display panel, and the second curved area can be completely attached to the first curved area, thereby reducing the resilience force of the support layer, preventing the flexible display panel from peeling off, and improving the service life of the flexible display device.

[0006] According to some embodiments of the present invention, the fixing layer includes: a base layer located in the second flat area of the fixing layer; a first polymer layer disposed on the surface of the base layer close to the flexible display panel; a second polymer layer disposed at the side end of the base layer and located in the second curved area and integrally provided with the first polymer layer.

[0007] According to some embodiments of the present invention, the thickness of the second polymer layer is equal to the sum of the thicknesses of the base layer and the first polymer layer.

[0008] According to some embodiments of the present invention, the base layer includes: a third flat region, a folding groove, and a fourth flat region, the folding groove is disposed between the third flat region and the fourth flat region, wherein the folding groove is disposed close to the flexible display panel; the fixing layer further includes: a third polymer layer, the third polymer layer fills the folding groove, and the thickness of the third polymer layer is the same as the depth of the folding groove.

[0009] According to some embodiments of the present invention, the support layer includes a first support portion and a second support portion connected to each other, the second support portion bends in a direction away from the flexible display panel, and the thickness of the second support portion is less than the thickness of the first support portion.

[0010] According to some embodiments of the present invention, the thickness of the second support portion is 30 μm to 50 μm, and the thickness of the first support portion is 100 μm to 200 μm.

[0011] According to some embodiments of the present invention, the flexible display device further includes: a flexible cover plate, the flexible cover plate is disposed on a side of the second flat region away from the flexible display panel; a first optical adhesive layer, the first optical adhesive layer is disposed between the flexible display panel and the fixing layer; a second optical adhesive layer, the second optical adhesive layer is disposed between the fixing layer and the flexible cover plate; and an adhesive layer, the adhesive layer is disposed between the flexible display panel and the support layer.

[0012] In another aspect of the present application, a method for manufacturing the foregoing flexible display device is provided, including: providing a support layer; attaching the back surface of the flexible display panel to the support layer, the flexible display panel includes a display area and a non-display area, the display area includes a first flat region and a first curved region, the first curved region is disposed between the first flat region and the non-display area, and the first curved region bends toward the support layer; attaching a fixing layer to a side of the flexible display panel away from the support layer, the fixing layer corresponds to the display area, the fixing layer includes a second flat region and a second curved region, a positive projection of the second flat region on the flexible display panel overlaps with the first flat region, a positive projection of the second curved region on the flexible display panel covers the first curved region, and the second curved region is attached to the first curved region. Thus, the method has a simple process, and the risk of the flexible display panel falling off at the edge of the manufactured flexible display device can be reduced, and the service life of the flexible display device can be improved.

[0013] According to some embodiments of the present invention, the method for forming the fixing layer includes: providing a base layer, the base layer includes a third flat area, a folding groove and a fourth flat area, the folding groove is arranged between the third flat area and the fourth flat area, wherein the folding groove is arranged close to the flexible display panel; filling a third polymer layer in the folding groove of the base layer; forming a first polymer layer on the surface of the base layer close to the flexible display panel and on the surface of the third polymer layer, and simultaneously forming a polymer profiling layer at the side end of the base layer; profiling and curing the polymer profiling layer by using a profiling fixture to form a second polymer layer that bends towards the support layer.

[0014] According to some embodiments of the present invention, the support layer includes a first support portion and a second support portion, the orthographic projection of the first support portion on the flexible display panel overlaps with the first flat area, the orthographic projection of the second support portion on the flexible display panel is located in the first curved surface area, and the method further includes: etching the surface of the second support portion facing away from the flexible display panel so that the thickness of the second support portion is less than the thickness of the first support portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0016] Figure 1 shows a schematic structural diagram of a flexible display device according to an embodiment of the present invention;

[0017] Figure 2 shows a schematic structural diagram of a flexible display device according to another embodiment of the present invention;

[0018] Figure 3 shows a schematic structural diagram of a base material according to an embodiment of the present invention;

[0019] Figure 4 shows Figure 3 a schematic structural diagram of the base material from another perspective in;

[0020] Figure 5 shows a schematic structural diagram of a base material according to another embodiment of the present invention;

[0021] Figure 6 shows a schematic structural diagram of a flexible display device according to another embodiment of the present invention;

[0022] Figure 7 shows a schematic flow diagram of preparing a flexible display device according to an embodiment of the present invention;

[0023] Figure 8Shows a schematic flow chart of manufacturing a flexible display device according to another embodiment of the present invention.

[0024] Reference numerals:

[0025] 1: Flexible display device; 11: Support layer; 110: First support portion; 111: Second support portion; 12: Flexible display panel; 120: Display area; 121: Non-display area; 1201: First flat area; 1202: First curved area; 13: Fixing layer; 131: Base layer; 1310: Third flat area; 1311: Folding groove; 1312: Fourth flat area; 132: First polymer layer; 135: Polymer profiling layer; 133: Second polymer layer; 134: Third polymer layer; 1301: Second flat area; 1302: Second curved area; 14: Flexible cover plate; 15: First optical adhesive layer; 16: Second optical adhesive layer; 17: Bonding layer; 21: First profiling jig; 22: Second profiling jig. Detailed description of the specific implementation

[0026] The embodiments of the present invention will be described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as a limitation of the present invention. For those specific technologies or conditions not specified in the embodiments, they shall be carried out according to the technologies or conditions described in the literature in the art or according to the product specifications. For those reagents or instruments without indicating the manufacturer, they are all conventional products that can be obtained through commercial procurement.

[0027] In one aspect of the present invention, a flexible display device 1 is proposed. Referring to Figure 1 , it includes a support layer 11, a flexible display panel 12, and a fixing layer 13.

[0028] Among them, the flexible display panel 12 is disposed on one side of the support layer 11 and the back surface of the flexible display panel 12 is disposed close to the support layer 11. The surface of the flexible display panel 12 facing the light-emitting side is the front surface, and the back surface of the flexible display panel 12 is the surface facing away from the light-emitting side. Referring to Figure 1 , the flexible display panel 12 includes a display area 120 and a non-display area 121. The non-display area 121 is the area that bends toward the support layer 11 and is not used for display. The display area 120 includes a first flat area 1201 and a first curved area 1202. The first curved area 1202 is disposed between the first flat area 1201 and the non-display area 121 and is respectively connected to the first flat area 1201 and the non-display area 121. The first curved area 1202 bends toward the support layer 11;

[0029] The fixed layer 13 is disposed on a side of the flexible display panel 12 facing away from the support layer 11 and corresponds exactly to the display area 120. The so-called exact correspondence means that the orthographic projection of the fixed layer 13 on the flexible display panel 12 completely covers the display area 120 of the flexible display panel 12. The fixed layer 13 includes a second flat area 1301 and a second curved area 1302. The orthographic projection of the second flat area 1301 on the flexible display panel 12 overlaps with the first flat area 1201, and the orthographic projection of the second curved area 1302 on the flexible display panel 12 covers the first curved area 1202. The second curved area 1302 is attached to the first curved area 1202.

[0030] Specifically, the first curved area 1202 of the flexible display panel 12 and the second curved area 1302 of the fixed layer 13 form an edge of the flexible display device 1. The second curved area 1302 is attached to the first curved area 1202, that is, the second curved area 1302 is similar in shape to the first curved area 1202. The second curved area 1302 of the flexible display panel 12 can exert a certain pressure on the first curved area 1202 of the support layer 11, making the connection between the flexible display panel 12 and the support layer 11 more firm, preventing the flexible display panel 12 from falling off due to the rebound of the support layer 11, and improving the service life of the flexible display device 1.

[0031] According to some embodiments of the present invention, referring to Figure 2 , the fixed layer 13 may include: a base layer 131, the base layer 131 being located in the second flat area 1301 of the fixed layer 13; a first polymer layer 132, the first polymer layer 132 being disposed on a surface of the base layer 131 close to the flexible display panel 12; a second polymer layer 133, the second polymer layer 133 being disposed at a side end of the base layer 131 and located in the second curved area 1302, and being integrally provided with the first polymer layer 132. Specifically, the base layer 131 can serve as a carrier of the fixed layer 13. A first polymer layer 132 is formed on a surface of the base layer 131 facing the flexible display panel 12. The second polymer layer 133 is formed at at least one end in the extending direction of the base layer 131. For example, the second polymer layer 133 is disposed at one end in the extending direction of the base layer 131 and located in the second curved area 1302. Thus, the attachment of the second polymer layer 133 to the first curved area 1202 of the flexible display panel 12 can exert a certain pressure, making the connection between the flexible display panel 12 and the support layer 11 more firm, preventing the flexible display panel 12 from falling off due to the rebound of the support layer 11, and improving the service life of the flexible display device 1.

[0032] According to some embodiments of the present invention, the thickness of the second polymer layer 133 is equal to the sum of the thicknesses of the base layer 131 and the first polymer layer 132. That is to say, the surface of the fixing layer 13 facing the flexible display panel 12 is flush, so as to improve the display effect of the flexible display device 1.

[0033] According to some embodiments of the present invention, with reference to Figure 3 , the base layer 131 includes: a third flat area 1310, a folding groove 1311, and a fourth flat area 1312. The folding groove 1311 is disposed between the third flat area 1310 and the fourth flat area 1312, wherein the folding groove 1311 is disposed close to the flexible display panel 12. Thus, for the foldable flexible display device 1, folding can be performed at the position of the folding groove 1311. With reference to Figure 5 , the fixing layer 13 may further include: a third polymer layer 134, and the third polymer layer 134 is filled in the folding groove 1311, and the thickness of the third polymer layer 134 is the same as the depth of the folding groove 1311. Thus, that is to say, the surface of the first polymer layer 132 facing the flexible display panel 12 and the surface facing away from the flexible display panel 12 are both flush surfaces.

[0034] According to some embodiments of the present invention, with reference to Figure 1 , the support layer 11 includes a connected first support portion 110 and a second support portion 111. The second support portion 111 is bent in a direction away from the flexible display panel 12, and the thickness of the second support portion 111 is less than the thickness of the first support portion 110. Specifically, the flexible display device 1 further includes a housing (not shown in the figure). The housing is disposed on a side of the support layer 11 away from the flexible display panel 12. The thickness of the second support portion 111 is less than the thickness of the first support portion 110, that is, a gap is formed between the surface of the second support portion 111 facing away from the flexible display panel 12 and the housing. When the non-display area 121 of the flexible display panel 12 is bent toward the support layer 11, the flexible display panel 12 in the non-display area 121 after folding can be formed between the second support portion 111 and the housing, so that the space occupied by the flexible display panel 12 in the non-display area 121 after folding can be reduced, and the flexible display device 1 can be thinned.

[0035] According to some specific embodiments of the present invention, the thickness of the second support portion 111 may be 30 μm to 50 μm. For example, it may be 32 μm, 34 μm, 36 μm, 38 μm, 40 μm, 42 μm, 44 μm, 46 μm or 48 μm, etc.; the thickness of the first support portion 110 may be 100 μm to 200 μm. For example, it may be 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm or 190 μm, etc.

[0036] According to some embodiments of the present invention, with reference to Figure 6 , the flexible display device 1 may further include a flexible cover plate 14, the flexible cover plate 14 is disposed on a side of the second flat region 1301 away from the flexible display panel 12; a first optical adhesive layer 15, the first optical adhesive layer 15 is disposed between the flexible display panel 12 and the fixing layer 13; a second optical adhesive layer 16, the second optical adhesive layer 16 is disposed between the fixing layer 13 and the flexible cover plate 14; an adhesive layer 17, the adhesive layer 17 is disposed between the flexible display panel 12 and the support layer 11. That is to say, the flexible display device 1 includes a support layer 11; an adhesive layer 17, the adhesive layer 17 is disposed on one surface of the support layer 11; a flexible display panel 12, the flexible display panel 12 is disposed on a surface of the adhesive layer 17 away from the support layer 11; a first optical adhesive layer 15, the first optical adhesive layer 15 is disposed on a side of the flexible display panel 12 away from the adhesive layer 17; a fixing layer 13, the fixing layer 13 is disposed on a side of the first optical adhesive layer 15 away from the flexible display panel 12; a second optical adhesive layer 16, the second optical adhesive layer 16 is disposed on a side of the fixing layer 13 away from the first optical adhesive layer 15; a flexible cover plate 14, the flexible cover plate 14 is disposed on a side of the second optical adhesive layer 16 away from the fixing layer 13. Thus, the support layer 11 and the flexible display panel 12 are bonded through the adhesive layer 17, and the fixing layer 13 can reduce the rebound force of the support layer 11, improve the bonding effect of the adhesive layer 17, prevent the first curved surface region 1202 of the flexible display panel 12 from detaching from the support layer 11, and improve the service life of the flexible display device 1.

[0037] According to some embodiments of the present invention, the material for forming the base layer 131 in the fixing layer 13 is not particularly limited. For example, it may be at least one of polyimide (CPI), polyethylene terephthalate (PET) or glass, wherein the glass includes an ultra-thin flexible glass cover plate (UTG) or an unequal-thickness ultra-thin glass (UFG). According to some specific embodiments of the present invention, the base layer 131 may be UFG to improve the mechanical properties of the flexible display device 1.

[0038] According to some other embodiments of the present invention, the materials for forming the first polymer layer 132, the second polymer layer 133, and the third polymer layer 134 are not particularly limited. For example, the materials for forming the first polymer layer 132, the second polymer layer 133, and the third polymer layer 134 may independently include at least one of polyurethane and acrylic. Specifically, the materials of the first polymer layer 132, the second polymer layer 133, and the third polymer layer 134 may be the same or different.

[0039] According to some embodiments of the present invention, the flexible display device 1 may further have a sliding scroll shaft, and the sliding scroll shaft and the edge in this application are disposed at opposite ends of the flexible display device 1.

[0040] In another aspect of the present application, a method for manufacturing the foregoing flexible display device 1 is provided, including: providing a support layer 11; attaching the back surface of the flexible display panel 12 to the support layer 11, where the flexible display panel 12 includes a display area 120 and a non-display area 121, the display area 120 includes a first flat area 1201 and a first curved area 1202, the first curved area 1202 is disposed between the first flat area 1201 and the non-display area 121, and the first curved area 1202 is bent toward the support layer 11; attaching a fixing layer 13 to the side of the flexible display panel 12 facing away from the support layer 11, the fixing layer 13 corresponding exactly to the display area 120, the fixing layer 13 includes a second flat area 1301 and a second curved area 1302, the orthographic projection of the second flat area 1301 on the flexible display panel 12 overlaps with the first flat area 1201, the orthographic projection of the second curved area 1302 on the flexible display panel 12 covers the first curved area 1202, and the second curved area 1302 is attached to the first curved area 1202. Thus, the process of this method is simple, and the risk of the flexible display panel 12 falling off at the edge of the manufactured flexible display device 1 can be reduced, improving the service life of the flexible display device 1.

[0041] The following will explain each step of the method in detail. Referring to Figure 7 , the method includes:

[0042] S100: Prepare a fixing layer

[0043] According to some embodiments of the present invention, referring to Figure 8, the method for forming the fixing layer 13 includes: providing a base layer 131, the base layer 131 including a third flat area 1310, a folding groove 1311, and a fourth flat area 1312, the folding groove 1311 being disposed between the third flat area 1310 and the fourth flat area 1312, wherein the folding groove 1311 is disposed close to the flexible display panel 12; filling a third polymer layer 134 in the folding groove 1311 of the base layer 131; forming a first polymer layer 132 on the surface of the base layer 131 close to the flexible display panel 12 and on the surface of the third polymer layer 134, and simultaneously forming a polymer profiling layer 135 at the side end of the base layer 131; profiling and curing the polymer profiling layer 135 by using a profiling fixture to form a second polymer layer 133 that bends toward the support layer 11. Specifically, when the base layer 131 is UFG, the UFG includes a third flat area 1310, a folding groove 1311, and a fourth flat area 1312. The slurry of the third polymer layer 134 is coated in the folding groove 1311 and pre-cured to make the surface of the UFG provided with the folding groove 1311 flat. After filling the folding groove 1311, the slurry of the first polymer layer 132 is coated on the surface of the UFG provided with the folding groove 1311. When the materials of the first polymer layer 132, the second polymer layer 133, and the third polymer layer 134 are the same, the first polymer layer 132 and the polymer profiling layer 135 can be formed by one-time coating and curing; after curing, the polymer profiling layer 135 is profiled by using a profiling fixture. The profiling fixture includes a first profiling fixture 21 and a second profiling fixture 22. Both the first profiling fixture 21 and the second profiling fixture 22 include a flatness and a bending section. The shape of the bending section can be designed according to the shape of the first curved surface area 1202 of the flexible display panel 12. The first profiling fixture 21 and the second profiling fixture 22 are disposed on both sides in the thickness direction of the base layer 131. The bending sections of the first profiling fixture 21 and the second profiling fixture 22 profile the polymer profiling layer 135 through thermal curing to form the second polymer layer 133.

[0044] It should be noted that the thickness of the polymer profiling layer 135 is not particularly limited, and those skilled in the art can select it according to needs.

[0045] According to some embodiments of the present invention, the polymer profiling layer 135 is formed at one end of the substrate 131, and a fourth polymer layer (not shown in the figure) can also be formed at the opposite end of the substrate 131. The thickness of the fourth polymer layer can be the same as that of the polymer profiling layer 135. The fourth polymer layer covers the surface of the opposite end of the substrate 131, which can further improve the mechanical strength of the substrate 131 and reduce the risk of the substrate 131 breaking.

[0046] According to some specific embodiments of the present invention, the material of the base layer 131 is not particularly limited. For example, it can be at least one of polyimide (CPI), polyethylene terephthalate (PET), or glass, where the glass includes an ultra-thin flexible glass cover plate (UTG) or an unequal-thickness ultra-thin glass (UFG). According to some specific embodiments of the present invention, the base layer 131 can be UFG to improve the mechanical properties of the flexible display device 1.

[0047] According to some specific embodiments of the present invention, the materials for forming the first polymer layer 132, the second polymer layer 133, and the third polymer layer 134 are not particularly limited. For example, the materials for forming the first polymer layer 132, the second polymer layer 133, and the third polymer layer 134 independently include at least one of polyurethane and acrylic. Specifically, the materials of the first polymer layer 132, the second polymer layer 133, and the third polymer layer 134 can be the same or different.

[0048] S200: Form a flexible display panel

[0049] In this step, the light-emitting surface of the flexible display panel 12 is bonded to the fixing layer 13. Specifically, a first optical adhesive layer 15 can be provided between the flexible display panel 12 and the fixing layer 13 to bond the flexible display panel 12 and the fixing layer 13.

[0050] S300: Provide a support layer

[0051] In this step, the edge of the support layer 11 can also be thinned. Refer to Figure 1 , the thinned support layer 11 includes a first support portion 110 and a second support portion 111. The orthographic projection of the first support portion 110 on the flexible display panel 12 overlaps with the first flat region 1201, and the orthographic projection of the second support portion 111 on the flexible display panel 12 is located within the first curved surface region 1202, and the second support portion 111 bends away from the flexible display panel 12, and the thickness of the second support portion 111 is less than the thickness of the first support portion 110. Thus, the thinned second support portion 111

[0052] S400: Bond the fixing layer and the support layer

[0053] In this step, an adhesive layer 17 can be provided between the back surface of the flexible display panel 12 and the support layer 11, and roller bonding is performed according to the module process flow in the related art. The specific bonding process is not particularly limited herein.

[0054] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0055] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0056] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0059] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A flexible display device, characterized in that, Comprising: A support layer; A flexible display panel, which is disposed on one side of the support layer and the back surface of the flexible display panel is disposed close to the support layer. The flexible display panel includes a display area and a non-display area. The display area includes a first flat area and a first curved area. The first curved area is disposed between the first flat area and the non-display area, and the first curved area bends towards the support layer; A fixing layer, which is disposed on the side of the flexible display panel away from the support layer and corresponds to the display area. The fixing layer includes a second flat area and a second curved area. The orthographic projection of the second flat area on the flexible display panel overlaps with the first flat area, and the orthographic projection of the second curved area on the flexible display panel covers the first curved area. The second curved area is attached to the first curved area; A flexible cover plate, which is disposed on the side of the second flat area away from the flexible display panel; A second optical adhesive layer, which is disposed between the fixing layer and the flexible cover plate; The fixing layer includes: A base layer, which is located in the second flat area of the fixing layer; A first polymer layer, which is disposed on the surface of the base layer close to the flexible display panel; A second polymer layer, which is disposed at the side end of the base layer and is located in the second curved area, and is integrally provided with the first polymer layer; Wherein, the method for forming the fixing layer includes: providing the base layer, forming a first polymer layer on the surface of the base layer close to the flexible display panel, and simultaneously forming a polymer profiling layer at the side end of the base layer; using a profiling jig to profile and cure the polymer profiling layer to form the second polymer layer that bends towards the support layer.

2. The flexible display device according to claim 1, wherein The thickness of the second polymer layer is equal to the sum of the thicknesses of the base layer and the first polymer layer.

3. The flexible display device according to claim 1, wherein The base layer includes: a third flat area, a folding groove and a fourth flat area. The folding groove is disposed between the third flat area and the fourth flat area. Wherein, the folding groove is disposed close to the flexible display panel; The fixing layer further includes: a third polymer layer, which is filled in the folding groove, and the thickness of the third polymer layer is the same as the depth of the folding groove.

4. The flexible display device according to claim 1, characterized in that, The support layer includes a connected first support portion and a second support portion. The second support portion bends in a direction away from the flexible display panel, and the thickness of the second support portion is less than the thickness of the first support portion.

5. The flexible display device according to claim 4, wherein The thickness of the second support portion is 30μm to 50μm, and the thickness of the first support portion is 100μm to 200μm.

6. The flexible display device according to claim 1, wherein, Further comprising: A first optical adhesive layer, which is disposed between the flexible display panel and the fixing layer; An adhesive layer, which is disposed between the flexible display panel and the support layer.

7. A method for manufacturing a flexible display device according to any one of claims 1 to 6, characterized in that, Comprising: Providing a support layer; Bond the back surface of the flexible display panel to the support layer. The flexible display panel includes a display area and a non-display area. The display area includes a first flat area and a first curved area. The first curved area is disposed between the first flat area and the non-display area, and the first curved area is curved toward the support layer. Bond a fixing layer to the side of the flexible display panel facing away from the support layer. The fixing layer corresponds to the display area. The fixing layer includes a second flat area and a second curved area. The orthographic projection of the second flat area on the flexible display panel overlaps with the first flat area, and the orthographic projection of the second curved area on the flexible display panel covers the first curved area. The second curved area is bonded to the first curved area.

8. The method according to claim 7, characterized in that, The method for forming the fixing layer includes: Provide a base layer. The base layer includes a third flat area, a folding groove, and a fourth flat area. The folding groove is disposed between the third flat area and the fourth flat area. Among them, the folding groove is disposed close to the flexible display panel. Fill a third polymer layer into the folding groove of the base layer. Form a first polymer layer on the surface of the base layer close to the flexible display panel and on the surface of the third polymer layer, and simultaneously form a polymer profiling layer at the side end of the base layer. Use a profiling fixture to profile and cure the polymer profiling layer to form a second polymer layer that is curved toward the support layer.

9. The method according to claim 7, wherein The support layer includes a first support portion and a second support portion. The orthographic projection of the first support portion on the flexible display panel overlaps with the first flat area, and the orthographic projection of the second support portion on the flexible display panel is located within the first curved area. The method further includes: Etch the surface of the second support portion facing away from the flexible display panel so that the thickness of the second support portion is less than the thickness of the first support portion.

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