Display panel and manufacturing method thereof

Abstract

A display panel and a manufacturing method thereof, the display panel comprising: an array substrate, a functional film layer (4), and a protective layer (02), the array substrate comprising a display part (11) and a bending part (12), the bending part (12) being connected to one side of the display part (11); the functional film layer (4) being arranged on one side of the display part (11); the protective layer (02) covering the bending part (12), and the protective layer (02) and the functional film layer (4) being located on the same side of the array substrate, the protective layer (02) comprising: a first bending part (21) and a second bending part (22), the first bending part (21) being arranged adjacent to the functional film layer (4); the second bending part (22) being connected to one side of the first bending part (21) away from the functional film layer (4), and in the protective layer (02), the edge (222) of the second bending part (22) away from the first bending part (21) has the maximum distance to the functional film layer (4) in a first direction (X), wherein the first direction (X) is perpendicular to the interface between the display part (11) and the bending part (12); and wherein the difference between the maximum thickness of the first bending part (21) and the minimum thickness of the second bending part (22) is less than or equal to 0.05 mm.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display panel and a method for manufacturing the same. Background Technology

[0002] Flexible array substrates generally include a display section, a bonding section, and a curved section connecting the display section and the bonding section. A functional film layer is disposed on the display section, and a protective layer is required on the bonding section to protect the integrated circuitry. In existing technologies, a protective layer is typically coated on the curved section first, and then the functional film layer is bonded to the display section. To prevent the functional film layer from adhering to the protective layer, and considering the coating tolerances of the protective layer and the bonding tolerances of the functional film layer, a certain gap needs to be reserved between the functional film layer and the protective layer during the design process. This results in display panels in existing technologies having a relatively large bezel.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

[0004] Public content

[0005] According to one aspect of this disclosure, a display panel is provided, comprising: an array substrate, a functional film layer, a protective layer, and a cover plate. The array substrate includes a display portion and a curved portion connected to one side of the display portion; the functional film layer is disposed on one side of the display portion, and the functional film layer includes at least one of a light filter layer and a touch layer; the protective layer covers the curved portion, and the protective layer and the functional film layer are located on the same side of the array substrate, the protective layer including: a first curved portion and a second curved portion. The first curved portion is disposed adjacent to the functional film layer; the second curved portion is connected to the side of the first curved portion away from the functional film layer, the second curved portion including a second edge away from the first curved portion, wherein the second edge of the protective layer is at its maximum distance from the functional film layer in a first direction, wherein the first direction is perpendicular to the interface between the display portion and the curved portion; wherein the difference between the maximum thickness of the first curved portion and the minimum thickness of the second curved portion is less than or equal to 0.05 mm. The cover plate is located on the side of the functional film layer away from the array substrate.

[0006] In one exemplary embodiment of this disclosure, the maximum thickness of the first curved portion is greater than or equal to 0.13 mm and less than or equal to 0.15 mm, and the minimum thickness of the second curved portion is greater than or equal to 0.08 mm and less than or equal to 0.1 mm.

[0007] In an exemplary embodiment of this disclosure, the array substrate further includes a bonding portion, and the curved portion is connected between the display portion and the bonding portion. The display panel further includes: a chip, a first base film, and a second base film. The chip is bonded to the bonding portion, and the chip and the functional film layer are located on the same side of the array substrate. The first base film is located on the side of the display portion away from the functional film layer. The second base film is located on the side of the bonding portion away from the chip. The first curved portion includes a first edge connected to the second curved portion. In the first direction, the first edge is located between the first base film and the second edge, and the first edge is located between the second base film and the second edge. The distance between the first edge and the first base film in the first direction is less than or equal to the distance between the first edge and the second base film in the first direction.

[0008] In one exemplary embodiment of this disclosure, the distance between the edge of the first base film facing the first edge and the edge of the second base film facing the first edge in the first direction is greater than or equal to 0 mm and less than or equal to 0.2 mm.

[0009] In one exemplary embodiment of this disclosure, the distance between the first edge and the first base film in the first direction is greater than or equal to 0.125 mm and less than or equal to 0.225 mm; the distance between the first edge and the second base film in the first direction is greater than or equal to 0.125 mm and less than or equal to 0.425 mm.

[0010] In one exemplary embodiment of this disclosure, the arc length of the first curved portion is greater than or equal to 0.188 mm and less than or equal to 0.235 mm.

[0011] In one exemplary embodiment of this disclosure, the arc length of the second curved portion is greater than or equal to 0.235 mm and less than or equal to 0.285 mm.

[0012] In one exemplary embodiment of this disclosure, the binding portion is parallel to the display portion; in a second direction, the distance from the second edge to the binding portion is greater than the distance from the second edge to the display portion, the second direction is perpendicular to the plane where the display portion is located, and the distance from the binding portion to the display portion is 0.3-0.7 mm.

[0013] In one exemplary embodiment of this disclosure, the display panel further includes: a heat dissipation layer and an adhesive layer, wherein the heat dissipation layer is located on the side of the first base film opposite to the display portion; and the adhesive layer is located between the second base film and the heat dissipation layer.

[0014] In one exemplary embodiment of this disclosure, the distance between the heat dissipation layer and the first edge in the first direction is less than the distance between the adhesive layer and the first edge in the first direction.

[0015] In one exemplary embodiment of this disclosure, the thickness of the first curved portion gradually decreases from the edge near the functional film layer to the edge away from the functional film layer; the thickness of the second curved portion gradually decreases from the edge near the first curved portion to the edge away from the first curved portion.

[0016] In one exemplary embodiment of this disclosure, the protective layer further includes a third curved portion connected to the side of the second curved portion away from the first curved portion, and the thickness of the third curved portion gradually increases from the edge near the second curved portion to the edge away from the second curved portion.

[0017] According to one aspect of this disclosure, a display panel is provided, comprising: an array substrate, a functional film layer, a protective layer, and a cover plate. The array substrate includes a display portion and a curved portion, the curved portion being connected to one side of the display portion. The functional film layer is disposed on one side of the display portion, and the functional film layer includes at least one of a light filter layer and a touch layer. The protective layer covers the curved portion, and the protective layer and the functional film layer are located on the same side of the array substrate. The protective layer includes: a first curved portion and a second curved portion, the first curved portion being disposed adjacent to the functional film layer; the second curved portion being connected to the side of the first curved portion away from the functional film layer, the second curved portion including a second edge away from the first curved portion, wherein the second edge of the protective layer is at its maximum distance from the functional film layer in a first direction, wherein the first direction is perpendicular to the interface between the display portion and the curved portion; wherein the elastic modulus of the first curved portion is less than the elastic modulus of the second curved portion; and a cover plate located on the side of the functional film layer away from the array substrate.

[0018] According to one aspect of this disclosure, a method for manufacturing a display panel is provided, the method comprising:

[0019] A flexible array substrate is provided. The array substrate has a flat structure and includes a display portion, a bonding portion, and a curved portion connecting the display portion and the bonding portion.

[0020] A functional film layer is formed on the array substrate, and the orthographic projection of the functional film layer on the array substrate is located on the display section;

[0021] A protective layer is formed on the array substrate, the protective layer and the functional film layer are located on the same side of the array substrate, and the orthographic projection of the protective layer on the array substrate is located at the curved portion;

[0022] The protective layer includes a first curved portion near the functional film layer and a second curved portion located on the side of the first curved portion away from the functional film layer, wherein the stiffness of the first curved portion is less than the stiffness of the second curved portion.

[0023] The bent portion is bent so that the binding portion is located on the side of the display portion opposite to its display side.

[0024] In one exemplary embodiment of this disclosure, the thickness of the first curved portion is less than the thickness of the second curved portion.

[0025] In one exemplary embodiment of this disclosure, a protective layer is formed on the array substrate, comprising:

[0026] A protective layer material of uniform thickness is formed multiple times on the array substrate, and multiple layers of the protective layer material are used to form the protective layer;

[0027] The number of times the protective layer material is formed on the first curved portion is less than the number of times the protective layer material is formed on the second curved portion.

[0028] In one exemplary embodiment of this disclosure, a protective layer is formed on the array substrate, comprising:

[0029] A protective layer material of colloid is formed on the array substrate, the protective layer material being used to form the protective layer;

[0030] The first curved portion is located in the slope zone of the protective layer material.

[0031] In one exemplary embodiment of this disclosure, the elastic modulus of the first bent portion is less than that of the second bent portion.

[0032] In one exemplary embodiment of this disclosure, a protective layer is formed on the array substrate, comprising:

[0033] A colloidal protective layer material is formed on the array substrate;

[0034] The protective layer material is cured, wherein the degree of curing of the first curved portion is less than the degree of curing of the second curved portion.

[0035] In one exemplary embodiment of this disclosure, a protective layer is formed on the array substrate, comprising:

[0036] A colloidal protective layer material is formed on the array substrate;

[0037] The entire protective layer material is cured.

[0038] The first curved portion is softened.

[0039] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0040] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0041] Figure 1 This is a structural schematic diagram of a semi-finished display panel in the related technology;

[0042] Figure 2 This is a structural schematic diagram of a finished display panel in the related technology;

[0043] Figure 3 , 4 A process flow diagram of an exemplary embodiment of the display panel manufacturing method of this disclosure;

[0044] Figure 5 A process flow diagram of an exemplary embodiment of the display panel manufacturing method of this disclosure;

[0045] Figure 6 A process flow diagram of an exemplary embodiment of the display panel manufacturing method of this disclosure;

[0046] Figure 7 A process flow diagram of an exemplary embodiment of the display panel manufacturing method of this disclosure;

[0047] Figure 8 , 9 A process diagram illustrating another exemplary embodiment of the display panel manufacturing method of this disclosure;

[0048] Figure 10 This is a schematic diagram of the structure of an exemplary embodiment of the display panel disclosed herein;

[0049] Figure 11 This is a schematic diagram of another exemplary embodiment of the display panel disclosed herein. Detailed Implementation

[0050] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0051] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the icon's arrangement is flipped so that it is upside down, the component described as "up" will become the component described as "down." Other relative terms such as "high," "low," "top," "bottom," "left," and "right" also have similar meanings. When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0052] The terms “a,” “one,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that there may be other elements / components / etc. in addition to the listed elements / components / etc.

[0053] like Figure 1 , 2 As shown, Figure 1 This is a structural schematic diagram of a semi-finished display panel in related technologies. Figure 2 This is a schematic diagram of the structure of a finished display panel in the related art. In the related art, the display panel may include a flexible array substrate, a functional film layer 04, and a protective layer 02 (MCL, Metal Coating Layer). The flexible array substrate may include a display portion 011, a bent portion 012, and a bonding portion 013. The protective layer 02 may cover the bent portion 012, and the functional film layer 04 may be attached to the display portion 011. The bonding portion 013 may be used to bond a chip 03. The display panel may also include a first bottom film 071, a second bottom film 072, a heat dissipation layer 08, an adhesive layer 09, a cover plate 06, and an adhesive layer 05 bonded between the cover plate 06 and the functional film layer 04. The functional film layer 04 may include at least one of a light filter layer or a touch layer; for example, the functional film layer 04 may be a polarizer. The protective layer 02 can adjust the position of the neutral layer in the bent portion so that the neutral layer is located at the position of the metal trace layer in the bent portion, thereby reducing the possibility of breakage of the metal trace layer in the bent portion during bending. The material of cover plate 06 can be polyimide (PI), glass, etc.

[0054] In the prior art, a protective layer 02 is usually coated on the curved portion 012 first, and then the functional film layer 04 is bonded to the display portion 011. In order to avoid the functional film layer 04 from adhering to the protective layer 02, and considering the coating tolerance of the protective layer 02 and the bonding tolerance of the functional film layer 04, a certain gap needs to be reserved between the functional film layer 04 and the protective layer 02 during the design, so that the display panel will have a wider bottom bezel.

[0055] In related technologies, such as Figure 1 As shown, to reduce the bezel of the display panel, a functional film layer 04 can be first attached to the display portion 011, and then a protective layer 02 can be coated on the curved portion 012. However, because the functional film layer 04 has a capillary effect on the colloidal material used to form the protective layer 02, the protective layer 02 will exhibit localized thickening in region C near the functional film layer, resulting in a thickness difference in the protective layer 02 at the edge 021 of region C, away from the functional film layer. Figure 2 As shown, after the protective layer 02 bends with the curved portion 012, due to the different bending stresses at different locations, the protective layer 02 will thin out from its apex edge 023 (the rightmost position of the arc formed by the protective layer) towards both sides. This further increases the thickness difference at the edge 021. Simultaneously, because the edge 021 is close to the more stable cover plate 06, during display panel reliability testing, the protective layer is prone to folding along the edge 021, meaning it is prone to bending at a small angle at the edge 021. Therefore, circuit breaks are easily detected near the edge 021 of the protective layer. The protective layer may also include an edge 024 near the functional film layer 04. For example... Figure 2 As shown, the reliability test of the bonding area may include: pressing the edge 023 to the left by a pressure plate until the display panel shows a broken line, and recording the distance the pressure plate moves to the left when the display panel shows a broken line. The distance the pressure plate moves to the left when the display panel shows a broken line can be defined as the reliability value of the reliability test. The higher the reliability value, the higher the reliability of the display panel.

[0056] Based on this, this exemplary embodiment first provides a method for manufacturing a display panel, such as... Figure 3 , 4 As shown, Figure 3 , 4 A flow chart illustrating an exemplary embodiment of the display panel manufacturing method of this disclosure, the manufacturing method may include:

[0057] like Figure 3As shown, step S1: A flexible array substrate is provided. The array substrate can be a flat plate structure, and the array substrate includes a display part 11, a bonding part 13, and a curved part 12 connected between the display part 11 and the bonding part 13.

[0058] Step S2: A functional film layer 4 is formed on the array substrate. The orthographic projection of the functional film layer 4 on the array substrate is located on the display unit 11. The functional film layer 4 may include one or more of a filter layer and a touch layer. For example, the functional film layer 4 may be a polarizer.

[0059] Step S3: A protective layer is formed on the array substrate. The protective layer and the functional film layer 4 are located on the same side of the array substrate, and the orthographic projection of the protective layer on the array substrate is located at the curved portion 12. The orthographic projection of the protective layer on the array substrate can coincide with the curved portion 12; that is, the portion of the array substrate covered by the orthographic projection of the protective layer forms the curved portion 12, and the portion of the array substrate not covered by the orthographic projection of the protective layer forms the display portion 11 and the bonding portion 13. The display portion 11 and the bonding portion 13 are respectively connected to opposite sides of the curved portion 12.

[0060] The protective layer may include a first curved portion 21 near the functional film layer 4 and a second curved portion 22 located on the side of the first curved portion 21 away from the functional film layer, and the stiffness of the first curved portion 21 is less than the stiffness of the second curved portion 22.

[0061] like Figure 4 As shown, step S4: bend the bent portion 12 so that the binding portion 13 is located on the side of the display portion 11 away from its display side.

[0062] In this exemplary embodiment, the stiffness of the first bent portion 21 is less than the stiffness of the second bent portion 12. (In related art) Figure 2 In comparison, this exemplary embodiment reduces the stiffness of the first bending portion 21. Therefore, in the reliability test, when the baffle travels a distance of... Figure 2 When the reliability value is high, because the first curved portion 21 has higher bending performance, under the bending action of the first curved portion 21 itself, no folding will occur along the first edge 211 of the first curved portion 211 near the second curved portion 22. Therefore, the reliability value of the display panel will also increase accordingly. Here, the first edge 211 can be understood as the interface between the first curved portion 21 and the second curved portion 22.

[0063] In this exemplary embodiment, as Figure 3As shown, the first curved portion 21 and the second curved portion 22 can be distributed along the first direction X. The protective layer can be formed by coating a protective layer colloidal material onto the array substrate and then curing the colloidal material to form the protective layer. For example... Figure 3 As shown, when a protective layer colloid material is coated on the array substrate, due to the fluidity of the protective layer colloid material, a ramp portion 24 appears at its edge after curing. In this exemplary embodiment, the second bend portion 22 can connect the first bend portion 21 and the ramp portion 24. Figure 3 As shown, the protective layer may further include a third bend 23, which may be connected between the second bend 22 and the ramp 24. Figure 4 As shown, the first curved portion 21 may include a third edge 213 adjacent to the functional film layer 4, and the second curved portion 22 may include a second edge 222 away from the first curved portion 21. The third curved portion 23 may include a fourth edge 234 away from the second curved portion 22. Figure 4 As shown, after the protective layer is bent, the second edge 222 of the second bent portion 22 can be located at the apex of the arc formed by the protective layer. That is, in the protective layer, the distance between the second edge 222 and the functional film layer 4 in the first direction X is the largest. Here, the second edge 222 can be understood as the interface between the second bent portion 22 and the third bent portion 23, and the third edge 213 can be understood as the interface between the first bent portion 21 and the functional film layer 4.

[0064] In this exemplary embodiment, as Figure 3 As shown, the dimension of the first curved portion 21 in the first direction X can be equal to Figure 2 The arc distance between the middle edge 024 and the edge 021. That is, after the protective layer is bent, the first edge 211 of the first bent portion 21 can be located at the position where the protective layer should fold. Because the stiffness of the first bent portion 21 is less than that of the second bent portion 22 before bending, the stiffness difference between the two sides of the first edge 211 after bending is relatively large. Figure 2 The rigidity difference between the two sides of the middle protective layer on the edge 021 is small, so that the first edge 211 is not easy to fold during the reliability test, and the folding position will move towards the third edge 213. Since the third edge 213 is close to the display part 11 and the structure of the display part 11 is relatively stable, the display panel made by the display panel manufacturing method has higher reliability.

[0065] It should be understood that, in other exemplary embodiments, the dimension of the first curved portion 21 in the first direction X may also be slightly larger than that of the first curved portion 21. Figure 2 The arc distance between edge 021 and edge 024 of the middle protective layer is, or slightly less than Figure 2The arc distance between edge 021 and edge 024 of the middle protective layer is within the protection scope of this disclosure.

[0066] In this exemplary embodiment, the method for obtaining the dimension of the first bent portion 21 in the first direction X can be as follows: Reliability testing is performed on multiple display panels respectively; the location of the trace breakage on the array substrate in each display panel is obtained; the protective layer near the trace breakage location is observed; the location with a large thickness difference in the protective layer near the trace breakage location is obtained; the arc length from the location with the large thickness difference in the protective layer to the side near the functional film layer is measured; and the average value of the above arc lengths is calculated. This average value can be the dimension of the first bent portion 21 in the first direction X. The location of the trace breakage on the array substrate can be obtained through a detection circuit. After obtaining the trace breakage location on the array substrate, the bent portion 12 in the array substrate can be sliced ​​(injected with epoxy resin and cured with a curing agent, then the cross-section is polished). The cross-section of the bent portion 12 can then be observed under a microscope to obtain the location with a large thickness difference in the protective layer near the trace breakage location. The number of display panels for reliability testing can be 16, 32, etc.

[0067] In this exemplary embodiment, as Figure 5 , 6 The diagram shown is a process flow chart of an exemplary embodiment of the display panel manufacturing method of this disclosure. One way to achieve a stiffness of the first bent portion 21 being less than the stiffness of the second bent portion 22 is to have a thickness of the first bent portion 21 less than the thickness of the second bent portion 22. Specifically, the thickness of the first bent portion 21 can be 70%-90% of the thickness of the second bent portion 22, for example, 70%, 80%, 90%, etc. Specifically, the thickness of the first bent portion 21 can be 105±30 μm, and the thickness of the second bent portion 22 can be 120±30 μm. Figure 6 The diagram shown is a process flow chart of an exemplary embodiment of the display panel manufacturing method of this disclosure. After the protective layer is bent, under bending stress, the thickness difference between the first bent portion 21 and the second bent portion 22 decreases compared to before bending. Correspondingly, the thickness step difference at the first edge 211 position decreases accordingly. Therefore, in reliability testing, folding is less likely to occur at the first edge 211, and the folding position will move towards the third edge 213. Since the third edge 213 is closer to the display portion 11 side, and the structure on the display portion 11 side is more stable, the display panel manufactured by this display panel manufacturing method has higher reliability. It should be noted that the thickness of the first bent portion 21 being less than the thickness of the second bent portion 22 can be understood as the average thickness of the first bent portion 21 being less than the average thickness of the second bent portion 22, or the minimum thickness of the first bent portion 21 being less than the minimum thickness of the second bent portion 22. When forming the protective layer, Figure 5The intermediate functional film layer 4 also exerts a siphon effect on the protective adhesive material used to form the first curved portion 21. The thickness of the side of the first curved portion 21 near the functional film layer 4 can be greater than or equal to, or less than, the thickness of the second curved portion 22. Correspondingly, as Figure 6 As shown, after the protective layer is bent, the thickness at the third edge 213 can be greater than or equal to or less than the thickness at the fourth edge 234.

[0068] In this exemplary embodiment, as Figure 6 As shown, after the protective layer is bent, under the action of bending stress, the thickness of the first bent portion 21 can gradually decrease from the third edge 213 to the first edge 211; the thickness of the second bent portion 22 can gradually decrease from the side closer to the first bent portion 21 to the side farther away from the first bent portion 21. The thickness of the third bent portion 23 can gradually increase from the edge closer to the second bent portion 22 to the side farther away from the second bent portion 22.

[0069] In this exemplary embodiment, as Figure 6 As shown, after the protective layer is bent, the difference between the maximum thickness of the first bent portion and the minimum thickness of the second bent portion can be less than or equal to 0.05 mm. For example, the difference can be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, or 0.05 mm. The maximum thickness of the first bent portion 21 can be the thickness at the third edge 213 position of the first bent portion 21. The minimum thickness of the second bent portion can be the thickness at the second edge 222 position of the second bent portion 22. The maximum thickness of the first bent portion can be greater than the minimum thickness of the second bent portion.

[0070] In this exemplary embodiment, as Figure 6 As shown, the arc length of the first bend can be greater than or equal to 0.188 mm and less than or equal to 0.235 mm, for example, 0.188 mm, 0.200 mm, or 0.235 mm. The arc length of the second bend can be greater than or equal to 0.235 mm and less than or equal to 0.285 mm, for example, 0.235 mm, 0.255 mm, or 0.285 mm.

[0071] The maximum thickness of the first bent portion can be greater than or equal to 0.13 mm and less than or equal to 0.15 mm. For example, the maximum thickness of the first bent portion can be 0.13 mm, 0.135 mm, 0.14 mm, or 0.15 mm. The minimum thickness of the second bent portion can be greater than or equal to 0.08 mm and less than or equal to 0.1 mm. For example, the minimum thickness of the second bent portion can be 0.08 mm, 0.09 mm, or 0.1 mm. The protective layer can be an MCL adhesive layer.

[0072] The distance between the binding part 13 and the display part 11 can be 0.3-0.7 mm, for example, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, or 0.7 mm. This distance can be understood as the distance from the side of the binding part 13 facing the display part 11 to the side of the display part 11 facing the binding part 13.

[0073] In this exemplary embodiment, one way to achieve a thickness of the first curved portion being less than the thickness of the second curved portion is to form a protective layer material of uniform thickness multiple times on the array substrate. Multiple layers of the protective layer material can be used to form the protective layer. Specifically, the number of times the protective layer material is formed on the first curved portion 21 can be less than the number of times the protective layer material is formed on the second curved portion 22. It should be understood that in other exemplary embodiments, there are other ways to achieve a thickness of the first curved portion being less than the thickness of the second curved portion. For example, a coating process can be used to form the protective layer. When the coating component moves to the location of the first curved portion 21, the thickness of the first curved portion 21 can be reduced by decreasing the output amount of the coating component.

[0074] In this exemplary embodiment, the size of the protective layer ramp area in the first direction is generally about 400 μm. However, in the specific method described above for obtaining the size of the first curved portion 21 in the first direction X, the size of the first curved portion 21 in the first direction in each display panel is smaller than the size of the ramp area in the first direction. In this exemplary embodiment, as... Figure 7 The diagram shown is a process flow chart of an exemplary embodiment of the display panel manufacturing method of this disclosure. Forming a protective layer on the array substrate may include: forming a protective layer material in the form of an adhesive on the array substrate, the protective layer material being used to form the protective layer. The first curved portion 21 may be located in the ramp area of ​​the protective layer material. Specifically, when coating the protective layer material, the coating position can be controlled so that the first curved portion 21 is located in the ramp area of ​​the protective layer material, while ensuring that the protective layer material flows to the functional film layer 4. In production line equipment, there are two alignment methods for coating the protective layer material: alignment based on a mark and alignment based on the functional film layer. Since it is necessary for the protective layer material to flow to the edge of the functional film layer 4, this exemplary embodiment may adopt the functional film layer reference alignment method, that is, using the functional film layer attachment position as a reference, grasping the edge of the functional film layer for alignment to correct the position of the coating material.

[0075] It should be noted that during the formation of the protective layer, Figure 7The intermediate functional film layer 4 also exerts a siphon effect on the protective layer adhesive material used to form the first curved portion 21. The thickness of the side of the first curved portion 21 near the functional film layer 4 can be greater than or equal to or less than the thickness of the second curved portion 22. Correspondingly, after the protective layer is bent, the thickness at the third edge 213 can be greater than or equal to or less than the thickness at the fourth edge 234.

[0076] In this exemplary embodiment, there are other ways to achieve a stiffness in the first bending portion that is less than the stiffness in the second bending portion. For example... Figure 8 , 9 As shown, Figure 8 , 9 This is a flow chart illustrating another exemplary embodiment of the display panel manufacturing method of this disclosure. Another way to achieve a stiffness of the first bent portion 21 being less than the stiffness of the second bent portion 22 is that the elastic modulus of the first bent portion 21 is less than the elastic modulus of the second bent portion 22. For example... Figure 9 As shown, after the protective layer is bent, although a large thickness difference still occurs at the first edge 211, because the elastic modulus of the first bent portion 21 is less than that of the second bent portion 22, the first edge 211 is less prone to folding under the bending action of the first bent portion 21 itself during the reliability test. Simultaneously, the folding position will move towards the third edge 213. Since the third edge 213 is closer to the display portion 11 and the structure on the display portion 11 side is more stable, the display panel manufactured by this display panel manufacturing method has higher reliability.

[0077] In this exemplary embodiment, one way to achieve a lower elastic modulus for the first bent portion 21 than for the second bent portion 22 is to form a colloidal protective layer material on the array substrate; and to cure the protective layer material, wherein the degree of curing of the first bent portion 21 is less than that of the second bent portion 22. In this exemplary embodiment, the protective layer material can be a resin material, which may contain a photoinitiator or photosensitizer. After absorbing ultraviolet (UV) light, the protective layer material generates active free radicals, thereby initiating polymerization, crosslinking, and grafting reactions, causing the resin to transform from a colloidal state to a solid state within seconds. In this exemplary embodiment, the curing process of the protective layer material can be performed by irradiating the protective layer material with an ultraviolet lamp. The degree of curing of the protective layer material is positively correlated with the power of the ultraviolet lamp and the irradiation time; therefore, by adjusting the power of the ultraviolet lamp and / or the irradiation time, different degrees of curing of the first bent portion 21 and the second bent portion 22 can be achieved. For example, in this exemplary embodiment, the curing degree of the first curved portion 21 can be reduced by decreasing the UV irradiation time or the UV irradiation power of the first curved portion 21, thereby reducing the elastic modulus of the first curved portion 21.

[0078] It should be understood that there are other ways to achieve a lower elastic modulus for the first curved portion 21 than for the second curved portion 22. For example, after curing the first curved portion 21 and the second curved portion 22, a catalyst can be coated on the first curved portion 21. This catalyst can disrupt the molecular chain structure in the first curved portion 21, thereby achieving a softening effect on the first curved portion 21.

[0079] In this exemplary embodiment, as Figure 3-9 As shown, before bending the curved portion, the display panel manufacturing method may further include: forming the display portion 11 on a first base film 71, and forming the bonding portion 13 on a second base film 72; bonding a cover plate 6 to the side of the functional film layer 4 opposite to the array substrate via an adhesive layer 5; forming a heat dissipation layer 8 on the side of the first base film 71 opposite to the array substrate; forming an adhesive layer 9 on the side of the heat dissipation layer 8 opposite to the substrate; and forming a chip 3 on the bonding portion 13. The cover plate 6 may be made of polyimide (PI), glass, or the like.

[0080] It should be understood that, in other exemplary embodiments, the stiffness of the first bending portion can also be adjusted by simultaneously adjusting the thickness and elastic modulus of the first bending portion.

[0081] This exemplary embodiment also provides a display panel, such as Figure 10 The diagram shown is a schematic representation of an exemplary embodiment of the display panel disclosed herein. The display panel may include an array substrate, a functional film layer 4, and a protective layer. The array substrate may include a display portion 11 and a curved portion 12, the curved portion 12 being connected to one side of the display portion 11; the functional film layer 4 is disposed on one side of the display portion 11; the protective layer covers the curved portion 12, and the protective layer and the functional film layer 4 are located on the same side of the array substrate. The protective layer may include a first curved portion 21 and a second curved portion 22. The first curved portion 21 is disposed adjacent to the functional film layer 4; the second curved portion 22 is connected to the side of the first curved portion 21 away from the functional film layer 4, and the second curved portion 22 may include a second edge 222 away from the first curved portion. In the protective layer, the distance between the second edge 222 of the second curved portion 22 away from the first curved portion 21 and the functional film layer 4 in the first direction X is the largest, wherein the first direction is perpendicular to the interface between the display portion and the curved portion, i.e., the first direction is parallel to the plane where the display portion 11 is located. The array substrate can be a flexible array substrate, and the functional film layer 4 can include one or more of a filter layer and a touch layer; for example, the functional film layer 4 can be a polarizer. The display panel provided in this exemplary embodiment can... Figure 5 , 6 or Figure 7The manufacturing method shown is used to obtain the protective layer. Before bending, the thickness of the first bent portion is less than the thickness of the second bent portion, compared to... Figure 2 In the prior art shown, after the protective layer is bent, the maximum thickness of the first bent portion decreases accordingly, while the maximum thickness of the second bent portion remains essentially unchanged. The difference between the maximum thickness of the first bent portion and the minimum thickness of the second bent portion can be less than or equal to 0.05 mm; for example, the difference can be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, or 0.05 mm. The maximum thickness of the first bent portion 21 can be the thickness at the third edge 213 position of the first bent portion 21. The minimum thickness of the second bent portion can be the thickness at the second edge 222 position of the second bent portion 22. The maximum thickness of the first bent portion can be greater than the minimum thickness of the second bent portion.

[0082] It should be noted that the protective layer and the functional film layer 4 are located on the same side of the array substrate, which can be understood as the protective layer and the functional film layer 4 being located on the same surface of the array substrate. The functional film layer 4 is disposed on one side of the display unit 11, which can be understood as the orthographic projection of the functional film layer 4 onto the display unit 11.

[0083] like Figure 10 As shown, the first curved portion 21 may include a first edge 211 connected to the second curved portion 22 and a third edge 213 adjacent to the functional film layer 4. This display panel, compared to... Figure 2 In the display panel of the related technology, the protective layer has a small thickness difference at the first edge 211 of the first curved portion 21. During reliability testing, the first edge 211 is less prone to folding, and the folding position shifts towards the third edge 213. Since the third edge 213 is closer to the display portion 11, the structure on the display portion 11 side is more stable. Therefore, the display panel manufactured by this method has higher reliability. The first edge 211 can be understood as the interface between the first curved portion 21 and the second curved portion 22, and the third edge can be understood as the interface between the first curved portion 21 and the functional film layer 4.

[0084] In this exemplary embodiment, the maximum thickness of the first bent portion can be greater than or equal to 0.12 mm and less than or equal to 0.135 mm, for example, 0.12 mm, 0.13 mm, or 0.135 mm. The maximum thickness of the second bent portion can be greater than or equal to 0.09 mm and less than or equal to 0.105 mm, for example, 0.09 mm, 0.1 mm, or 0.105 mm. The protective layer can be an MCL adhesive layer.

[0085] In this exemplary embodiment, as Figure 10As shown, the thickness of the first curved portion 21 can gradually decrease from the third edge 213 on the side close to the functional film layer to the first edge 211 on the side away from the functional film layer; the thickness of the second curved portion 22 can gradually decrease from the edge on the side close to the first curved portion 21 to the edge 222 on the side away from the first curved portion 21.

[0086] In this exemplary embodiment, as Figure 10 As shown, the protective layer may further include a third bend 23 and a ramp 24. The third bend 23 may be connected to the side of the second bend 22 away from the first bend 21, and the ramp 24 may be connected to the side of the third bend 23 away from the second bend 22. The third bend 23 may include a fourth edge 234 away from the second bend 22, and the thickness of the third bend 23 may gradually increase from the edge near the second bend 22 towards the fourth edge 234. The thickness at the third edge 213 may be greater than or equal to or less than the thickness at the fourth edge 234. The second edge 222 can be understood as the interface between the second bend 22 and the third bend 23. The fourth edge 234 can be understood as the interface between the third bend 23 and the ramp 24.

[0087] In this exemplary embodiment, as Figure 10As shown, the array substrate may further include a bonding portion 13, which may be parallel to the display portion 11. The bending portion 12 is connected between the display portion 11 and the bonding portion 13. The display panel may further include: a chip 3, a first base film 71, and a second base film 72. The chip 3 may be bonded to the bonding portion 13, and the chip 3 and the functional film layer 4 may be located on the same side of the array substrate; the first base film 71 may be located on the side of the display portion away from the functional film layer 4; and the second base film 72 may be located on the side of the bonding portion 13 away from the chip 3. In the first direction X, the first edge 211 may be located between the first base film 71 and the second edge 222, and the first edge 211 may be located between the second base film 72 and the second edge 222; and the distance S1 between the first edge 211 and the first base film 71 in the first direction X is less than or equal to the distance S2 between the first edge 211 and the second base film 72 in the first direction X. This configuration allows the distance S4 between the second edge 222 and the bonding portion 13 in the second direction Y to be greater than the distance S5 between the second edge 222 and the display portion 11 in the second direction Y after the protective layer is bent. The second direction Y can be perpendicular to the plane where the display portion 11 is located. That is, the second edge 222 is located at the midpoint between the third edge 213 and the fourth edge 234, biased towards the third edge 213. As a result, the first edge 211 can have a larger bending radius, meaning that the first edge 211 is less prone to folding during reliability testing.

[0088] It should be noted that, as Figure 10The diagram shows a cross-sectional view of the display panel along any section perpendicular to the bending axis of the bent portion 12. In this cross-sectional view, the first edge 211 may include a position point 2111 that contacts the bent portion 12, and the second edge 222 includes a position point 2221 that contacts the bent portion 12. The edge of the first base film 71 facing the first edge 211 includes a position point 711, which contacts the flexible array substrate. The edge of the second base film 72 facing the first edge 211 includes a position point 721, which also contacts the flexible array substrate. The bonding portion 13 includes a side surface 131 facing the second base film 72, and the display portion 11 includes a side surface 111 facing the first base film 71. The distance between the first edge 211 and the first base film 71 in the first direction X can be understood as the distance from position point 2111 to the first plane containing position point 711, where the first plane is perpendicular to the first direction. The distance between the first edge 211 and the second bottom film 72 in the first direction X can be understood as the distance from position point 2111 to the second plane where position point 721 is located, and the second plane is perpendicular to the first direction X. The distance between the second edge 222 and the binding part 13 in the second direction Y can be understood as the distance between position point 2221 and the plane where the side surface 131 is located. The distance between the second edge 222 and the display part 11 in the second direction Y can be understood as the distance between position point 2221 and the plane where the side surface 111 is located.

[0089] In this exemplary embodiment, as Figure 10 As shown, the distance S3 between the edge of the first bottom film 71 facing the first edge 211 and the edge of the second bottom film 72 facing the first edge 211 in the first direction can be greater than or equal to 0 mm and less than or equal to 0.2 mm, for example, 0 mm, 0.1 mm, or 0.2 mm. The distance between the first edge 211 and the first bottom film 71 in the first direction can be greater than or equal to 0.125 mm and less than or equal to 0.225 mm, for example, 0.125 mm, 0.155 mm, or 0.225 mm. The distance between the first edge 211 and the second bottom film 72 in the first direction can be greater than or equal to 0.125 mm and less than or equal to 0.425 mm, for example, 0.125 mm, 0.225 mm, 0.325 mm, or 0.425 mm.

[0090] It should be noted that the distance between the edge of the first bottom film 71 facing the first edge 211 and the edge of the second bottom film 72 facing the first edge 211 in the first direction can be understood as the distance between the first plane where position point 711 is located and the second plane where position point 721 is located, wherein both the first plane and the second plane are perpendicular to the first direction.

[0091] In this exemplary embodiment, as Figure 10 As shown, the arc length of the first curved portion 21 can be greater than or equal to 0.188 mm and less than or equal to 0.235 mm, for example, 0.188 mm, 0.215 mm, or 0.235 mm. The arc length of the second curved portion 22 can be greater than or equal to 0.235 mm and less than or equal to 0.285 mm, for example, 0.235 mm, 0.255 mm, or 0.285 mm.

[0092] In this exemplary embodiment, the distance from the bonding portion 13 to the display portion 11 can be 0.3-0.7 mm, for example, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, or 0.7 mm. This distance can be understood as the distance from the side of the bonding portion 13 facing the display portion 11 to the side of the display portion 11 facing the bonding portion 13. The display panel achieves a reliability value of 215 μm to 225 μm in reliability testing.

[0093] In this exemplary embodiment, as Figure 10 As shown, the display panel further includes a heat dissipation layer 8 and an adhesive layer 9. The heat dissipation layer 8 can be located on the side of the first bottom film 71 opposite to the display part 11; the adhesive layer 9 can be located between the second bottom film 72 and the heat dissipation layer 8. The heat dissipation layer 8 can have a certain degree of elasticity, which can be used to improve the shock resistance of the display panel. The material of the heat dissipation layer 8 can be ultra-clean foam. The heat dissipation layer 8 can also adjust the distance between the bonding part 13 and the display part 11 by adjusting its own thickness, thereby adjusting the bending radius of the bending part 12. The adhesive layer 9 can be used to fix the heat dissipation layer 8 and the second bottom film 72.

[0094] In this exemplary embodiment, as Figure 10 As shown, the adhesive layer 9 needs to be completely attached to the heat dissipation layer 8 to provide good support and ensure the reliability of the display panel. However, there is an attachment tolerance between the adhesive layer 9 and the heat dissipation layer 8. Therefore, in the design, the adhesive layer 9 needs to be recessed to the left relative to the heat dissipation layer 8, that is, the distance between the heat dissipation layer 8 and the first edge 211 in the first direction X is less than the distance between the adhesive layer 9 and the first edge 211 in the first direction X. This design allows the adhesive layer 9 to be completely attached to the heat dissipation layer 8 even with the attachment tolerance.

[0095] This exemplary embodiment also provides a display panel, such as Figure 11 The diagram shown is a structural schematic of another exemplary embodiment of the display panel disclosed herein. This display panel can be achieved through the above-described... Figure 8 , 9The display panel is manufactured using the method shown. The display panel may include: an array substrate, a functional film layer 4, and a protective layer. The array substrate may include a display portion 11 and a curved portion 12, the curved portion 12 being connected to one side of the display portion 11; the functional film layer 4 is disposed on one side of the display portion 11; the protective layer covers the curved portion, and the protective layer and the functional film layer 4 are located on the same side of the array substrate. The protective layer includes: a first curved portion 21 and a second curved portion 22, the first curved portion 21 being adjacent to the functional film layer 4; the second curved portion 22 being connected to the first curved portion 21. On the side away from the functional film layer 4, the edge of the second curved portion 22 away from the first curved portion 21 is located at the apex of the arc formed by the protective layer. That is, in the protective layer, the second edge 222 of the second curved portion 22 away from the first curved portion 21 is the furthest from the functional film layer 4 in the first direction X. The first direction is perpendicular to the interface between the display portion and the curved portion, that is, the first direction is parallel to the plane where the display portion 11 is located. The elastic modulus of the first curved portion 21 can be less than the elastic modulus of the second curved portion 22. The first curved portion 21 includes a first edge 211 adjacent to the second curved portion 22 and a third edge 213 adjacent to the functional film layer.

[0096] In this exemplary embodiment, as Figure 11 As shown, the protective layer may further include a third curved portion 23 and a ramp portion 24. The third curved portion 23 may be connected to the side of the second curved portion 22 away from the first curved portion 21, and the ramp portion 24 may be connected to the side of the third curved portion 23 away from the second curved portion 22. The third curved portion 23 may include a fourth edge 234 away from the second curved portion 22, and the thickness of the third curved portion 23 may gradually increase from the edge near the second curved portion 22 to the fourth edge 234. Because the functional film layer 4 has a capillary effect on the colloidal material used to form the protective layer when the protective layer is formed, the thickness at the third edge 213 before the protective layer is bent is greater than the thickness at the fourth edge 234. Therefore, after the protective layer is bent, the thickness at the third edge 213 will also be correspondingly greater than the thickness at the fourth edge 234. The second edge 222 can be understood as the interface between the second curved portion 22 and the third curved portion 23. The fourth edge 234 can be understood as the interface between the third curved portion 23 and the ramp portion 24. The first edge 211 can be understood as the interface between the first curved portion 21 and the second curved portion 22, and the third edge can be understood as the interface between the first curved portion 21 and the functional film layer 4.

[0097] In this exemplary embodiment, as Figure 11As shown, since the elastic modulus of the first bending portion 21 is smaller than that of the second bending portion 22, in the reliability test, the first edge 211 is less prone to folding under the bending action of the first bending portion 21 itself. At the same time, the folding position will move towards the third edge 213. Since the third edge 213 is closer to the display portion 11, the structure on the display portion 11 side is more stable. Therefore, the display panel manufactured by this display panel manufacturing method has higher reliability.

[0098] like Figure 11 As shown, the display panel may further include a first base film 71, a second base film 72, a cover plate 6, an adhesive layer 5, a heat dissipation layer 8, an adhesive layer 9, and a chip 3. The first base film 71, the second base film 72, the cover plate 6, the adhesive layer 5, the heat dissipation layer 8, the adhesive layer 9, and the chip 3 can be coupled with… Figure 10 The display panels in the two systems have the same structure and positional relationship.

[0099] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0100] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is defined only by the appended claims.

Claims

1. A display panel, wherein, The display panel includes: An array substrate includes a display section and a curved section, wherein the curved section is connected to one side of the display section and is curved. A functional film layer is disposed on one side of the display unit, and the functional film layer includes at least one of a filter layer and a touch layer; A protective layer covers the curved portion, and the protective layer and the functional film layer are located on the same side of the array substrate. The protective layer is bent along with the curved portion, and the protective layer includes: The first curved portion is in contact with the functional film layer; The second curved portion is connected to the side of the first curved portion away from the functional film layer. The second curved portion includes a second edge away from the first curved portion. In the protective layer, the distance between the second edge and the functional film layer is the largest in a first direction. The first direction is perpendicular to the interface between the display portion and the curved portion. Wherein, the difference between the maximum thickness of the first curved portion and the minimum thickness of the second curved portion is less than or equal to 0.05 mm; A cover plate, the cover plate being located on the side of the functional film layer away from the array substrate.

2. The display panel according to claim 1, wherein, The maximum thickness of the first curved portion is greater than or equal to 0.13 mm and less than or equal to 0.15 mm, and the minimum thickness of the second curved portion is greater than or equal to 0.08 mm and less than or equal to 0.1 mm.

3. The display panel according to claim 1, wherein, The array substrate further includes a bonding portion, the bent portion is connected between the display portion and the bonding portion, and the display panel further includes: A chip is bonded to the bonding portion, and the chip and the functional film layer are located on the same side of the array substrate; The first base film is located on the side of the display unit opposite to the functional film layer; The second bottom film is located on the side of the bonding portion opposite to the chip; The first curved portion includes a first edge that connects to the second curved portion; Wherein, in the first direction, the first edge is located between the first bottom film and the second edge, and the first edge is located between the second bottom film and the second edge; Furthermore, the distance between the first edge and the first base film in the first direction is less than or equal to the distance between the first edge and the second base film in the first direction.

4. The display panel according to claim 3, wherein, The distance between the edge of the first bottom film facing the first edge and the edge of the second bottom film facing the first edge in the first direction is greater than or equal to 0 mm and less than or equal to 0.2 mm.

5. The display panel according to claim 4, wherein, The distance between the first edge and the first base film in the first direction is greater than or equal to 0.125 mm and less than or equal to 0.225 mm; The distance between the first edge and the second bottom film in the first direction is greater than or equal to 0.125 mm and less than or equal to 0.425 mm.

6. The display panel according to claim 1, wherein, The arc length of the first bend is greater than or equal to 0.188 mm and less than or equal to 0.235 mm.

7. The display panel according to claim 6, wherein, The arc length of the second bend is greater than or equal to 0.235 mm and less than or equal to 0.285 mm.

8. The display panel according to claim 3, wherein, The binding part is parallel to the display part; In the second direction, the distance from the second edge to the binding portion is greater than the distance from the second edge to the display portion, and the second direction is perpendicular to the plane where the display portion is located; The distance between the binding part and the display part is 0.3-0.7 mm.

9. The display panel according to claim 3, wherein, The display panel also includes: A heat dissipation layer is located on the side of the first bottom film opposite to the display portion; An adhesive layer is located between the second base film and the heat dissipation layer.

10. The display panel according to claim 9, wherein, The distance between the heat dissipation layer and the first edge in the first direction is less than the distance between the adhesive layer and the first edge in the first direction.

11. The display panel according to claim 1, wherein, The thickness of the first curved portion gradually decreases from the edge near the functional film layer to the edge away from the functional film layer; The thickness of the second curved portion gradually decreases from the edge closest to the first curved portion to the edge furthest from the first curved portion.

12. The display panel according to claim 1, wherein, The protective layer also includes: The third bend is connected to the side of the second bend away from the first bend, and the thickness of the third bend gradually increases from the edge near the second bend to the edge away from the second bend.

13. A display panel, wherein, The display panel includes: An array substrate includes a display section and a curved section, wherein the curved section is connected to one side of the display section and is curved. A functional film layer is disposed on one side of the display unit, and the functional film layer includes at least one of a filter layer and a touch layer; A protective layer covers the curved portion, and the protective layer and the functional film layer are located on the same side of the array substrate. The protective layer is bent along with the curved portion, and the protective layer includes: The first curved portion is in contact with the functional film layer; The second curved portion is connected to the side of the first curved portion away from the functional film layer. The second curved portion includes a second edge away from the first curved portion. In the protective layer, the distance between the second edge and the functional film layer is the largest in a first direction. The first direction is perpendicular to the interface between the display portion and the curved portion. Wherein, the elastic modulus of the first bending portion is less than that of the second bending portion; A cover plate, the cover plate being located on the side of the functional film layer away from the array substrate.

14. A method for manufacturing a display panel, wherein, include: A flexible array substrate is provided. The array substrate has a flat structure and includes a display portion, a bonding portion, and a curved portion connecting the display portion and the bonding portion. A functional film layer is formed on the array substrate, and the orthographic projection of the functional film layer on the array substrate is located on the display section; A protective layer is formed on the array substrate, the protective layer and the functional film layer are located on the same side of the array substrate, and the orthographic projection of the protective layer on the array substrate is located at the curved portion; The protective layer includes a first curved portion near the functional film layer and a second curved portion located on the side of the first curved portion away from the functional film layer, wherein the stiffness of the first curved portion is less than the stiffness of the second curved portion. The bent portion is bent so that the binding portion is located on the side of the display portion opposite to its display side.

15. The method for manufacturing a display panel according to claim 14, wherein, The thickness of the first curved portion is less than the thickness of the second curved portion.

16. The method for manufacturing a display panel according to claim 15, wherein, A protective layer is formed on the array substrate, comprising: A protective layer material of uniform thickness is formed multiple times on the array substrate, and multiple layers of the protective layer material are used to form the protective layer; The number of times the protective layer material is formed on the first curved portion is less than the number of times the protective layer material is formed on the second curved portion.

17. The method for manufacturing a display panel according to claim 15, wherein, A protective layer is formed on the array substrate, comprising: A protective layer material of colloid is formed on the array substrate, the protective layer material being used to form the protective layer; The first curved portion is located in the slope zone of the protective layer material.

18. The method for manufacturing a display panel according to claim 14, wherein, The elastic modulus of the first bending portion is less than that of the second bending portion.

19. The method for manufacturing a display panel according to claim 18, wherein, A protective layer is formed on the array substrate, comprising: A colloidal protective layer material is formed on the array substrate; The protective layer material is cured, wherein the degree of curing of the first curved portion is less than the degree of curing of the second curved portion.

20. The method for manufacturing a display panel according to claim 18, wherein, A protective layer is formed on the array substrate, comprising: A colloidal protective layer material is formed on the array substrate; The entire protective layer material is cured. The first curved portion is softened.

Images