Flexible display panel, display device and manufacturing method of flexible display panel

Abstract

The invention provides a flexible display panel, a display device and a manufacturing method of the flexible display panel, the flexible display panel comprises a substrate, a first flat layer, a first conductive layer, a second flat layer and a third flat layer which are stacked in sequence, and the flexible display panel further comprises a first area and a second area which are connected with each other, the first area is used for displaying, the second area is used for bending, the second flat layer and the third flat layer are both located in the first area, and at least one of the second flat layer and the third flat layer is located in the second area; wherein the first flat layer is located in a first area and a second area, and the thickness of the first flat layer in the first area is larger than the thickness of the first flat layer in the second area. Therefore, the thickness of the bending area can be reduced, and the stress is reduced.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of display technology, and in particular, to a flexible display panel, a display device, and a method for manufacturing a flexible display panel. Background Art

[0002] As users' viewing experience of display products improves, narrowing the border of the display screen has become an important way to increase the screen-to-body ratio. Therefore, flexible display panels are usually used in display products, and the narrow border design is achieved by bending the bending area of ​​the flexible display panel. Flexible display panels usually include a substrate, a driving circuit layer, a pixel definition layer, a flat layer, and a conductive layer. When the bending area is bent, the substrate, flat layer, and other functional layers in the bending area will generate bending stress. When the bending area is subjected to external impact, the metal wiring and the flat layer in the bending area are prone to cracking.

[0003] At present, in order to pursue the development of the display screen border towards the narrowest possible, the radius of the bending zone is getting smaller and smaller, and the risk of fracture in the bending zone is also getting higher and higher. Summary of the invention

[0004] In order to solve the above problems, embodiments of the present application provide a flexible display panel, a display device and a method for manufacturing a flexible display panel, so as to at least partially solve the above problems.

[0005] In a first aspect, the present application provides a flexible display panel, comprising a substrate, a first flat layer, a first conductive layer, a second flat layer and a third flat layer stacked in sequence, the flexible display panel also comprising a first area and a second area connected to each other, the first area being used for display, and the second area being used for bending; the second flat layer and the third flat layer are both located in the first area, and at least one of the second flat layer and the third flat layer is located in the second area; wherein the first flat layer is located in the first area and the second area, and the thickness of the first flat layer in the first area is greater than the thickness in the second area.

[0006] Optionally, the first planar layer includes a first part and a second part that are adjacent to each other, the first part is located in the first region, the second part is located in the first region and the second region, and the thickness of the second part on a side close to the first region gradually decreases in a direction from the first region toward the second region.

[0007] Optionally, the second flat layer is located in the first region and the second region, the third flat layer is located in the first region, a boundary of the third flat layer is located in the first region, and a second gap exists between a boundary of the third flat layer in the first region and a boundary line between the first region and the second region.

[0008] Optionally, the third flat layer is located in the first region and the second region, the second flat layer is located in the first region, a boundary of the second flat layer is located in the first region, and a third gap exists between a boundary of the second flat layer in the first region and a boundary line between the first region and the second region.

[0009] Optionally, the flexible display panel further includes a pixel defining layer, which is stacked on a side of the third flat layer away from the second flat layer, and the pixel defining layer is at least located in the first region.

[0010] Optionally, the pixel defining layer is located in the first region and the second region, or the pixel defining layer is located in the first region, and a boundary of the pixel defining layer is located in the first region.

[0011] Optionally, the flexible display panel further includes a touch layer, which is stacked on a side of the pixel defining layer away from the third flat layer, and is located in the first area. The touch layer can be used to achieve touch control of the flexible display panel, enriching the user experience.

[0012] In a second aspect, the present application provides a display device, comprising the above-mentioned flexible display panel.

[0013] In a third aspect, the present application provides a method for manufacturing a flexible display panel, which is used to manufacture the above-mentioned flexible display panel, and the method includes:

[0014] forming a substrate, the substrate comprising a first region and a second region, the substrate being flexible so as to be able to bend in the second region;

[0015] forming a first planar layer covering the first region and the second region by a film forming process;

[0016] exposing the first planar layer using a mask;

[0017] The first planar layer is partially removed in the second region by an etching process to a preset thickness.

[0018] Optionally, exposing the first flat layer using a mask plate includes: exposing the first flat layer using a half-grayscale mask plate with different light transmittance; removing a preset thickness of the first flat layer in the second area by an etching process includes: removing a portion of the first flat layer in the second area by a preset thickness by the same etching process; and removing a preset portion of the first flat layer in the first area and close to the second area, the thickness of the preset portion gradually increasing in a direction from the first area toward the second area.

[0019] Based on the above technical solution provided by the present application, since the thickness of the first flat layer in the bending area is reduced, when the second area is bent, the bending stress of the first flat layer can be reduced, thereby reducing the risk of fracture; and the bending stress of the flat layers on both sides of the first conductive layer is balanced, that is, the bending stress of the first flat layer is balanced with the sum of the bending stresses of the second flat layer and the third flat layer, thereby reducing the risk of fracture of the second flat layer or the third flat layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following drawings are intended only to illustrate and explain the present application, and do not limit the scope of the present application.

[0021] Figure 1 It is a structural schematic diagram of a flexible display panel in the related art;

[0022] Figure 2 is a schematic diagram of a flexible display panel breaking at a bending area in the related art;

[0023] Figure 3 is a schematic structural diagram of a flexible display panel provided by an exemplary embodiment of the present application;

[0024] Figure 4 is a schematic structural diagram of a flexible display panel provided by an exemplary embodiment of the present application;

[0025] Figure 5 is a schematic structural diagram of a flexible display panel provided by an exemplary embodiment of the present application;

[0026] Figure 6 is a schematic structural diagram of a flexible display panel provided by an exemplary embodiment of the present application;

[0027] Figure 7 It is a schematic diagram of the structure of a flexible display panel provided by an exemplary embodiment of the present application.

[0028] Figure 8 This exemplary embodiment of the present application is based on Figure 3 A schematic top view of a flexible display panel is provided.

[0029] Fig. 9 It is a flow chart of a method for manufacturing a flexible display panel provided by an exemplary embodiment of the present application.

[0030] Description of reference numerals:

[0031] 10-substrate, 21-first flat layer, 22-second flat layer, 23-third flat layer,

[0032] 31-first conductive layer, 32-second conductive layer,

[0033] 40-pixel definition layer, 50-interlayer dielectric layer, 60-touch layer, 70-glass cover plate,

[0034] A0-first area, A1-effective display area, A2-transition area, B0-second area,

[0035] X2-second gap, X3-third gap.

[0036] S901, forming a substrate, wherein the substrate comprises a first region and a second region, and the substrate is flexible so as to be able to be bent in the second region;

[0037] S902, forming a first planar layer covering the first region and the second region by a film forming process;

[0038] S903, exposing the first planar layer using a mask plate;

[0039] S904, removing a portion of the first planar layer in the second region by an etching process to a preset thickness. DETAILED DESCRIPTION

[0040] In order to have a clearer understanding of the technical features, purposes and effects of the embodiments of the present application, the specific implementation methods of the embodiments of the present application are now described with reference to the accompanying drawings.

[0041] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0042] In order to simplify the drawings, only the parts related to the present application are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one or more of the parts with the same structure or function are schematically drawn or only one or more of them are marked.

[0043] Figure 1 is a schematic diagram of a flexible display panel in the related art, Figure 2 for Figure 1Schematic diagram of the flexible display panel breaking in the bending area. The flexible display panel includes a substrate, a first flat layer PLN2, a first conductive layer M4, a second flat layer PLN3 and a third flat layer PLN4, which are distributed in sequence. The thickness of each flat layer in the bending area P2 is the same as that in the non-bending area P1. As the radius of the bending area decreases, the risk of the first conductive layer M4 and each flat layer breaking increases. The non-bending area P1 here includes a display area and a non-display area.

[0044] In order to solve this technical problem, the present application provides a flexible display panel, referring to Figure 3 The flexible display panel includes a substrate 10, a first flat layer 21, a first conductive layer 31, a second flat layer 22 and a third flat layer 23 stacked in sequence, and the flexible display panel also includes a first area A0 and a second area B0 connected to each other, the first area A0 is used for display, and the second area B0 is used for bending; the second flat layer 22 and the third flat layer 23 are both located in the first area A0, and at least one of the second flat layer 22 and the third flat layer 23 is located in the second area B0; wherein the first flat layer 21 is located in the first area A0 and the second area B0, and the thickness of the first flat layer 21 in the first area A0 is greater than the thickness in the second area B0.

[0045] Through the above technical solution, it is equivalent to keeping the thickness of the first flat layer 21 in the first area unchanged, but reducing the thickness of the first flat layer 21 in the second area B0 used for bending, so that the overall thickness of the second area B0 is reduced, then when the second area B0 is bent, the bending stress of the first flat layer 21 can be reduced, thereby reducing the risk of fracture; and the bending stress of the flat layers on both sides of the first conductive layer 31 is balanced, that is, the bending stress of the first flat layer 21 is balanced with the sum of the bending stresses of the second flat layer 22 and the third flat layer 23, thereby reducing the risk of fracture of the second flat layer 22 or the third flat layer 23.

[0046] It should be clear that the substrate 10 is flexible, and each functional layer stacked on the substrate 10 and located in the second area B0 is flexible to allow the second area B0 to be bent. Among them, the substrate 10 may include a first flexible substrate 11, an isolation layer 13 and a second flexible substrate 12. The isolation layer 13 may have insulating properties and can play a role in blocking external static electricity. The first flexible substrate 11 and the second flexible substrate 12 may be organic materials, for example, PET (Polyethyleneterephthalate), PI (Polyimide) or PEN (Polyethylenenaphthalate two formic acid glycol ester). The flat layer may also be an organic material, which is not limited in this application.

[0047] In addition, the substrate 10, the first flat layer 21, the first conductive layer 31, the second flat layer 22 and the third flat layer 23 are all stacked on each other in the thickness direction of the flexible display panel. The thickness of the first flat layer 21 is the vertical distance between the surface of the first flat layer 21 away from the substrate 10 and the substrate 10. Before the flexible display panel is bent, the first area A0 and the second area B0 are distributed along the extension direction of the flexible display panel.

[0048] For ease of understanding, the following first briefly introduces the functional layers that the flexible display panel provided in the present application may include.

[0049] In one example, the flexible display panel may further include a light-emitting layer and a driving circuit. The light-emitting layer may be located on the side of the third flat layer 23 away from the substrate 10. The light-emitting layer may include a plurality of light-emitting devices capable of emitting light of different colors. The first conductive layer 31 is connected between the light-emitting layer and the driving circuit. Furthermore, the flexible display panel may further include a binding area. The second area B0 is connected between the binding area and the first area A0. By bending the second area B0, the binding area is bent to the non-display side of the flexible display panel, that is, the binding area is located on the side of the substrate 10 away from the light-emitting layer. Thus, the display device has a narrow frame.

[0050] In one example, reference Figure 3 and Figure 4 The flexible display panel further includes a pixel defining layer 40, which is stacked on the side of the third flat layer 23 away from the second flat layer 22, and the pixel defining layer 40 is at least located in the first area A0. The pixel defining layer 40 defines a plurality of openings, and the light-emitting devices are accommodated in the openings of the pixel defining layer 40. The plurality of light-emitting devices arranged in this manner emit light and turn off under the drive of the driving circuit, thereby realizing the display function. Specifically, the light-emitting device may include an anode, a light-emitting functional layer, and a cathode.

[0051] Furthermore, the flexible display panel further includes a second conductive layer 32, which may be located between the pixel defining layer 40 and the third planar layer 23, and the second conductive layer 32 is connected between the light emitting device and the first conductive layer 31. The second conductive layer 32 may include a light-transmitting wire, and the light emitting device may be connected to the first conductive layer 31 through the light-transmitting wire.

[0052] In one example, the driving circuit is located between the substrate 10 and the first flat layer 21. The first flat layer 21 can fill the step difference on the surface of the driving circuit and facilitate the formation of the first conductive layer 31. The first conductive layer 31 is connected between the anode 32 of the light emitting device and the driving circuit.

[0053] Further, in order to realize the electrical connection between the driving circuit and the first conductive layer 31, refer to Figure 3 The flexible display panel also includes an interlayer dielectric layer 50, which is located between the substrate 10 and the first flat layer 21. The interlayer dielectric layer 50 has insulating properties, and a via is provided on the interlayer dielectric layer 50. The driving circuit is connected to the first conductive layer 31 via the via.

[0054] It should be clear that the light-emitting device and the driving circuit are well known to those skilled in the art and are not shown in the figure, wherein the light-emitting device may include a red light-emitting unit capable of emitting red light, a green light-emitting unit capable of emitting green light, and a blue light-emitting unit capable of emitting blue light. Exemplarily, an organic light-emitting diode (OLED) may be selected in an embodiment of the present invention to make the above-mentioned light-emitting device. Alternatively, the light-emitting device may also be set as a micro light-emitting diode (Micro Light Emitting Diode, Micro-LED) or a quantum dot light-emitting diode (QLED). The driving circuit may include a plurality of electronic devices such as thin film transistors (TFT) and storage capacitors.

[0055] The improvements made to the bending zone in the present application will be described in detail below.

[0056] In one example, the thickness of the first flat layer 21 in the first area A0 can be greater than 2.2 microns, and the thickness of the first flat layer 21 in the second area B0 can be less than 1.6 microns. In the manufacturing process of the flexible display panel, at the edge of the first area A0, foreign particles (particles) are easily generated at the edge of the mask plate during the evaporation process. The presence of particles will pierce the packaging film layer, provide a path for water and oxygen to invade, and reduce the packaging reliability. Therefore, the thickness of the first flat layer 21 in the first area A0 is made larger to be able to cover the particles and ensure the packaging reliability. At the same time, thinning the thickness of the first flat layer 21 in the second area B0 can reduce the bending stress.

[0057] In one possible implementation, reference Figure 3 The first flat layer 21 may include adjacent first and second parts, the first part is located in the first area A0, the second part is located in the first area A0 and the second area B0, and the thickness of the second part on the side close to the first area A0 gradually decreases in the direction from the first area A0 toward the second area B0.

[0058] Through the above technical solution, the thickness difference between the first area A0 and the second area B0 of the first flat layer 21 can be gradually transitioned, that is, the step difference can be reduced, and the stress of the first flat layer 21 at the boundary between the first area A0 and the second area B0 can be reduced. Furthermore, since the thickness of the first flat layer 21 changes gradually, the first conductive layer 31 stacked on the first flat layer 21 can gradually change with the height difference between the first area A0 and the second area B0 of the first flat layer 21, reducing the risk of the first conductive layer 31 being easily broken due to a small corner.

[0059] Among them, reference Figure 3 and Figure 4 , the first area A0 may include an effective display area A1 and a transition connection area A2, and the transition connection area A2 is connected between the effective display area A1 and the second area B0. The first part of the first flat layer 21 is located in the effective display area A1, and the second part of the first flat layer 21 is located on the transition connection area A2 and the second area B0. The thickness of the second part located in the transition connection area A2 gradually decreases in the direction from the first area A0 to the second area B0, so that the step difference can be reduced, so that the first flat layer 21 of the effective display area A1 and the first flat layer 21 of the second area B0 are smoothly transitioned and connected, reducing stress.

[0060] It should be clear that the thickness of the second portion of the first flat layer 21 gradually decreases in the transition connection area A2, which may include three situations:

[0061] The first one is that the thickness of the second portion in the entire transition zone A2 decreases continuously in the direction from the first area A0 toward the second area B0.

[0062] The second type is that the second part includes a straight section and a gradient section that are connected to each other within the entire transition connection area A2. The thickness of the straight section is consistent at all locations, while the gradient section gradually decreases in the direction from the first area A0 to the second area B0. One of the straight section and the gradient section is close to the second area, and the other is close to the effective display area A1. When the straight section is close to the effective display area A1, the thickness of the straight section is the same as the thickness of the first part of the effective display area A1, and the thickness of the gradient section at the boundary between the first area A0 and the second area B0 is just reduced to the same as the thickness of the second part in the second area B0. Or vice versa, the gradient section is close to the effective display area A1, and the straight section is close to the second area B0, then the thickness of the straight section and the second part in the second area B0 is the same.

[0063] The third case is that the second part includes two straight sections and one gradient section in the entire transition area A2, the gradient section is connected between the two straight sections, the thickness of the straight section is uniform everywhere, and the gradient section gradually decreases in the direction from the first area A0 to the second area B0. Figures 2 to 6 The structure of the first flat layer 31 in the transition connection area A2 is shown and will not be described in detail.

[0064] In one example, there is a first gap between the first part and the second part. By setting the first gap, the first part and the second part can be separated, so that the water vapor of the second part can be blocked from entering the first part. The first gap can actually separate the first flat layer 21 of the effective display area A1 from the second flat layer 21 of the transition connection area A2. In the display device, the transition connection area A2 corresponds to the frame area of ​​the display surface. In the process of encapsulating the frame, water vapor is easily generated. The first gap can block the water vapor from being transferred to the first flat layer 21 of the effective display area A1. Among them, the first flat layer 21 can be first formed on the substrate 10, and then a part of the first flat layer can be removed by development and etching to obtain the separated first and second parts.

[0065] In one possible implementation, reference Figure 3 and Figure 4, the second flat layer 22 is located in the first area A0 and the second area B0, the third flat layer 23 is located in the first area A0, the boundary of the third flat layer 23 is located in the first area A0, and there is a second gap X2 between the boundary of the third flat layer 23 in the first area A0 and the boundary line between the first area A0 and the second area B0. In other words, the third flat layer 23 is only located in the first area A0, and there is no third flat layer 23 in the second area B0. In this way, the thickness of the bending area can be reduced, the risk of fracture in the bending area can be reduced, and it is beneficial for the bending area to have a smaller bending radius.

[0066] In an example, a boundary of the third planar layer 23 in the first area A0 may be located in the transition connection area A2.

[0067] In one example, the width of the second gap X2 is at least 10 microns.

[0068] In one possible implementation, reference Figures 5 to 7 , the third flat layer 23 is located in the first area A0 and the second area B0, the second flat layer 22 is located in the first area A0, the boundary of the second flat layer 22 is located in the first area A0, and there is a third gap X3 between the boundary of the second flat layer 22 in the first area A0 and the boundary line between the first area A0 and the second area B0. In other words, the second flat layer 22 is only located in the first area A0, and there is no second flat layer 22 in the second area B0. In this way, the thickness of the bending area can be reduced, the risk of fracture in the bending area is reduced, and it is beneficial for the bending area to have a smaller bending radius.

[0069] In an example, a boundary of the second planar layer 22 in the first area A0 may be located in the transition connection area A2.

[0070] In one possible embodiment, reference Figure 4 and Figure 6 , the pixel defining layer 40 is located in the first area A0, and the boundary of the pixel defining layer 40 is located in the first area A0. In other words, the pixel defining layer 40 is only located in the first area A0, and there is no pixel defining layer 40 in the second area B0. In this way, the thickness of the bending area, i.e., the second area, can be reduced, the risk of fracture in the bending area can be reduced, and it is beneficial for the bending area to have a smaller bending radius.

[0071] When the second area B0 does not have the third flat layer 23, and the boundary of the third flat layer 23 is located in the first area A0 or in the transition connection area A2, the boundary of the pixel defining layer 40 in the first area A0 may be flush with the third flat layer 23. Alternatively, the boundary of the third flat layer 23 exceeds the boundary of the pixel defining layer 40 in the first area A0, that is, the width of the third flat layer 23 is greater than the width of the pixel defining layer 40, and the width direction here is consistent with the distribution direction of the first area A0 and the second area B0.

[0072] In another possible embodiment, reference Figure 3 and Figure 7 , the pixel defining layer 40 is located in the first area A0 and the second area B0. In other words, since the second flat layer 22 or the third flat layer 23 is located in the second area B0, the pixel defining layer 40 is superimposed on the second flat layer 22 or the third flat layer 23 in the second area B0. In this case, if there is no third flat layer 23 in the second area B0, the pixel defining layer 40 covers the boundary of the third flat layer 23 located in the first area A0. If there is no second flat layer 23 in the second area B0, the third flat layer 23 covers the boundary of the second flat layer 23 located in the first area A0, and at the same time, the third flat layer 23 and the pixel defining layer 40 are also superimposed in the second area B0.

[0073] In a possible implementation, the flexible display panel further includes a touch layer 60, which is stacked on the side of the pixel defining layer 40 away from the third flat layer, and the touch layer 60 is located in the first area A0. The touch layer can be used to achieve touch control of the flexible display panel, enriching the user experience. The touch layer can be formed on the third flat layer by chemical vapor deposition.

[0074] In one example, the boundary of the touch layer 60 may be located in the transition connection area A2 , or may be flush with the boundary of the pixel definition layer 40 , or the boundary of the pixel definition layer 40 may exceed the boundary of the touch layer 60 .

[0075] In a possible implementation, the flexible display panel may further include a glass cover plate 70 , and the glass cover plate 70 may be adhered to the touch layer 60 by optical adhesive.

[0076] In one example, the boundary of the glass cover plate 70 may be located in the transition connection area A2 . The boundary of the glass cover plate 70 may exceed the boundary of the touch layer 60 to protect the touch layer 60 .

[0077] The present application also provides a display device, which includes the above-mentioned flexible display panel provided in the present application. The display device can be an electronic device such as a mobile phone, a computer, a television, etc. Based on the beneficial effects of the above-mentioned flexible display panel, the display device produced using the above-mentioned flexible display panel can have a good yield, which is conducive to reducing production costs, and at the same time, it is also conducive to making the frame of the display device narrower.

[0078] The present application also provides a method for manufacturing a flexible display module. The method can be used to manufacture the flexible display panel provided in the present application. Fig. 9 , the preparation method comprises:

[0079] S901, forming a substrate, wherein the substrate comprises a first region and a second region, and the substrate is flexible so as to be able to be bent in the second region;

[0080] S902, forming a first flat layer covering the first area and the second area through a film forming process; when the second area of ​​the substrate is bent, the first flat layer will also bend along with it.

[0081] S903, exposing the first planar layer using a mask plate;

[0082] S904, removing a preset thickness of the first flat layer in the second region by etching, so that the thickness of the first flat layer in the first region is greater than the thickness in the second region, thereby reducing stress during bending and reducing the risk of fracture in the bending region.

[0083] Further, after the first flat layer is etched, the first conductive layer 31, the second flat layer 22 and the third flat layer 23 may be formed on the first flat layer. Further, a pixel defining layer 40 may be formed on the third flat layer 23. These may be obtained by processing using common technical means in the art, and will not be described in detail here.

[0084] In a possible embodiment, S903, using a mask to expose the first flat layer includes: using a half-grayscale mask with different light transmittances to expose the first flat layer;

[0085] S904, removing a preset thickness of the first flat layer in the second area by an etching process includes: removing a portion of the first flat layer in the second area by a preset thickness by the same etching process; and removing a preset portion of the first flat layer in the first area and close to the second area, wherein the thickness of the preset portion gradually increases in a direction from the first area toward the second area.

[0086] Through the above technical solution, using a half-grayscale mask, the first flat layer can be etched in the first area and the second area through the same process, so that the thickness of the first flat layer in the first area and close to the second area after etching gradually decreases in the direction from the first area toward the second area. In other words, the first part and the second part of the first flat layer can be obtained through the same process.

[0087] It should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0088] It should be understood that although the specific embodiments of the present application are described in detail in conjunction with the accompanying drawings, it should not be understood as limiting the scope of protection of the present application. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of the present application. Although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A flexible display panel, characterized in that: The flexible display panel comprises a substrate (10), a first flat layer (21), a first conductive layer (31), a second flat layer (22) and a third flat layer (23) which are stacked in sequence, and the flexible display panel further comprises a first area (A0) and a second area (B0) which are connected to each other, the first area (A0) being used for display, the second area (B0) being used for bending, the second flat layer (22) and the third flat layer (23) being both located in the first area (A0), and at least one of the second flat layer (22) and the third flat layer (23) being located in the second area (B0); wherein, The first flat layer (21) is located in the first area (A0) and the second area (B0), and the thickness of the first flat layer (21) in the first area is greater than the thickness in the second area.

2. The flexible display panel according to claim 1, characterized in that: The first flat layer (21) includes a first portion and a second portion that are adjacent to each other, wherein the first portion is located in the first region (A0), and the second portion is located in the first region (A0) and the second region (B0), and the thickness of the second portion on a side close to the first region (A0) gradually decreases in a direction from the first region (A0) toward the second region (B0).

3. The flexible display panel according to claim 1, characterized in that: The second flat layer (22) is located in the first area (A0) and the second area (B0), the third flat layer (23) is located in the first area (A0), the boundary of the third flat layer (23) is located in the first area, and a second gap (J2) is formed between the boundary of the third flat layer (23) in the first area and the boundary line between the first area (A0) and the second area (B0).

4. The flexible display panel according to claim 1, characterized in that: The third flat layer (23) is located in the first area (A0) and the second area (B0), the second flat layer (22) is located in the first area (A0), the boundary of the second flat layer (22) is located in the first area (A0), and a third gap (J3) is provided between the boundary of the second flat layer (22) in the first area (A0) and the boundary line between the first area (A0) and the second area (B0).

5. The flexible display panel according to claim 1, characterized in that: The flexible display panel further comprises a pixel defining layer (40), the pixel defining layer (40) being stacked on a side of the third flat layer away from the second flat layer, and the pixel defining layer being at least located in the first region.

6. The flexible display panel according to claim 5, characterized in that: The pixel defining layer (40) is located in the first area (A0) and the second area (B0), or the pixel defining layer (40) is located in the first area (A0), and the boundary of the pixel defining layer (40) is located in the first area (A0).

7. The flexible display panel according to claim 5, characterized in that: The flexible display panel further comprises a touch layer (60), the touch layer (60) being stacked on a side of the pixel defining layer (40) away from the third flat layer (23), and the touch layer (60) being located in the first area.

8. A display device, characterized in that: The display device comprises the flexible display panel according to any one of claims 1 to 7.

9. A method for manufacturing a flexible display panel, characterized in that: Used to manufacture the flexible display panel according to any one of claims 1 to 7, the manufacturing method comprising: forming a substrate, the substrate comprising a first region and a second region, the substrate being flexible so as to be able to bend in the second region; forming a first planar layer covering the first region and the second region by a film forming process; exposing the first planar layer using a mask; The first planar layer is partially removed in the second region by an etching process to a preset thickness.

10. The manufacturing method according to claim 9, characterized in that: The exposing the first flat layer using a mask plate comprises: exposing the first flat layer using a half-grayscale mask plate with different light transmittances; The step of removing a preset thickness of the first flat layer in the second region by an etching process includes: removing a portion of the first flat layer in the second region by a preset thickness, and removing a portion of the first flat layer in the first region and close to the second region by a preset thickness by the same etching process, wherein the thickness of the preset portion gradually increases in a direction from the first region toward the second region.

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