Display panel, preparation method thereof and display device

Abstract

The application provides a display panel, a preparation method thereof and a display device. The display panel comprises a display area and a non-display area. The non-display area comprises a bending area located on at least one side of the display area. Part of the bending area is bent to the non-light-emitting side of the display panel. The display panel further comprises a first substrate, a protective layer and an inorganic isolation layer. In the thickness direction of the display panel, the inorganic isolation layer is located on one side of the first substrate. The first substrate is provided with a first opening. The first opening penetrates the first substrate and exposes part of the inorganic isolation layer. At least part of the first opening is located in the bending area. At least part of the protective layer is located in the first opening and is in contact with the inorganic isolation layer. In the application, the first opening is arranged in the first substrate to reduce the film layer thickness of the bending area, reduce the bending stress and reduce the risk of cracks in the film layer of the bending area. Furthermore, the protective layer is arranged in the first opening to protect the inorganic isolation layer and the bending area, thereby improving the structural stability of the bending area.

Description

Technical Field

[0001] This application relates to the field of display panel technology, and in particular to a display panel, its manufacturing method, and a display device. Background Technology

[0002] With the continuous development of technology, users' demands for display devices such as mobile phones and tablets are becoming more and more diversified, such as thinner and lighter designs, narrower or ultra-narrower bezels, etc.

[0003] Currently, to achieve narrow or ultra-narrow bezels in display devices, the edges of the display device can be bent towards the non-light-emitting side of the display panel, reducing the bezel size. However, with the increasing demand for thinner display devices, the bending radius is gradually decreasing. Consequently, after bending, the film layer in the bending area may crack due to excessive bending stress, affecting the structural and performance stability of the bending area. Summary of the Invention

[0004] This application provides a display panel and its manufacturing method, as well as a display device. By providing a first opening in a first substrate to reduce the film thickness in the bending region, bending stress is reduced, thus lowering the risk of cracks in the film layer in the bending region. Furthermore, a protective layer is provided within the first opening to protect the inorganic isolation layer and the bending region, thereby improving the structural stability of the bending region.

[0005] In a first aspect, embodiments of this application provide a display panel, including a display area and a non-display area, wherein the non-display area includes a bent area located on at least one side of the display area, and a portion of the bent area is bent to the non-light-emitting side of the display panel; The display panel further includes a first substrate, a protective layer, and an inorganic isolation layer, wherein the inorganic isolation layer is located on one side of the first substrate along a first direction; the first direction is the thickness direction of the display panel. The first substrate has a first opening, which penetrates the first substrate along the first direction and exposes a portion of the inorganic isolation layer, and at least a portion of the first opening is located in the bending region; At least a portion of the protective layer is located within the first opening and is in contact with the inorganic isolation layer.

[0006] Secondly, embodiments of this application provide a method for manufacturing a display panel, comprising: A display panel is provided, the display panel including a first substrate and an inorganic isolation layer; the inorganic isolation layer is located on one side of the first substrate along a first direction; the first direction is the thickness direction of the display panel; A first opening is formed in the first substrate, the first opening penetrating the first substrate along the first direction and exposing a portion of the inorganic isolation layer; A protective layer is prepared at least in the first opening, and a portion of the display panel is bent to the non-light-emitting side of the display panel at the location of the first opening.

[0007] Thirdly, embodiments of this application provide a display device including the display panel described in the first aspect.

[0008] In summary, the display panel provided in this application reduces the bezel size by bending a portion of the bending area to the non-light-emitting side of the display panel, thus facilitating a narrow bezel display panel design. Furthermore, the display panel includes a first substrate, a protective layer, and an inorganic isolation layer. The first substrate has a first opening, which reduces the film thickness in the bending area. This facilitates a smaller bending radius and releases bending stress generated during bending, reducing the risk of cracks in the film layer within the bending area and improving its structural and performance stability. Moreover, at least a portion of the protective layer is located within the first opening and in contact with the inorganic isolation layer. The protective layer encapsulates and protects both the bending area and the inorganic isolation layer, further enhancing the stability of the bending area. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this application and these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application; Figure 2 This is a schematic diagram of another display panel structure provided in an embodiment of this application; Figure 3 yes Figure 1 The diagram shows a cross-sectional structure of the display panel along section line A-A'. Figure 4 yes Figure 2 A schematic diagram of a cross-sectional structure of the display panel along section line B-B'; Figure 5 yes Figure 2 A schematic diagram of another cross-sectional structure of the display panel along section line B-B'; Figure 6 yes Figure 2 A schematic diagram of another cross-sectional structure of the display panel along section line B-B'; Figure 7 yes Figure 2A schematic diagram of another cross-sectional structure of the display panel along section line B-B'; Figure 8 yes Figure 1 The diagram shows another cross-sectional structure of the display panel along section line A-A'. Figure 9 yes Figure 2 A schematic diagram of another cross-sectional structure of the display panel along section line B-B'; Figure 10 yes Figure 2 A schematic diagram of another cross-sectional structure of the display panel along section line B-B'; Figure 11 This is a schematic diagram of the structure of another display panel provided in the embodiments of this application; Figure 12 This is a schematic diagram of another display panel structure provided in an embodiment of this application; Figure 13 This is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of this application; Figure 14 yes Figure 13 The process steps corresponding to the preparation method shown are illustrated in the diagram. Figure 15 This is a schematic flowchart of another method for manufacturing a display panel provided in an embodiment of this application; Figure 16 yes Figure 15 The process steps corresponding to the preparation method shown are illustrated in the diagram. Figure 17 This is a schematic flowchart of another method for manufacturing a display panel provided in an embodiment of this application; Figure 18 yes Figure 17 The diagram shown represents a process step diagram corresponding to the preparation method. Figure 19 yes Figure 17 The diagram shows another process step corresponding to the preparation method shown. Figure 20 This is a schematic flowchart of another method for manufacturing a display panel provided in an embodiment of this application; Figure 21 yes Figure 20 The process steps corresponding to the preparation method shown are illustrated in the diagram. Figure 22 This is a schematic flowchart of another method for manufacturing a display panel provided in an embodiment of this application; Figure 23 yes Figure 22 The process steps corresponding to the preparation method shown are illustrated in the diagram. Figure 24 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0011] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present application, not the entire structure.

[0012] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0013] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0014] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0015] Figure 1 This is a structural schematic diagram of a display panel provided in an embodiment of this application, specifically a structural schematic diagram of the display panel before the bending area is bent to the non-light-emitting side of the display panel, that is, a structural schematic diagram of the display panel in a flat state; Figure 2 This is a schematic diagram of another display panel structure provided in the embodiments of this application, specifically a schematic diagram of the structure after the bending area is bent to the non-light-emitting side of the display panel; Figure 3 yes Figure 1 The diagram shows a cross-sectional structure of the display panel along section line A-A'. Figure 4 yes Figure 2 A schematic diagram of a cross-sectional structure of the display panel along section line B-B'; Figure 5 yes Figure 2 Another cross-sectional view of the display panel along section line B-B'; combined with... Figure 1 , Figure 2 , Figure 3 Figure 4 and Figure 5 As shown, the display panel provided in this application embodiment includes a display area AA and a non-display area NAA. The non-display area NAA includes a bent area BA located on at least one side of the display area AA. A portion of the bent area BA1 is bent to the non-light-emitting side of the display panel. The display panel also includes a first substrate 11, a protective layer 12, and an inorganic isolation layer 13. Along a first direction (as shown by the X direction in the figure, the following description will take the first direction X as an example), the inorganic isolation layer 13 is located on one side of the first substrate 11. The first direction X is the thickness direction of the display panel. A first opening 14 is provided in the first substrate 11. Along the first direction X, the first opening 14 penetrates the first substrate 11 and exposes a portion of the inorganic isolation layer 13. At least a portion of the first opening 14 is located in the bent area BA. At least a portion of the protective layer 12 is located within the first opening 14 and is in contact with the inorganic isolation layer 13.

[0016] like Figures 1-5 As shown, the display panel includes a display area AA and a non-display area NAA, with the non-display area NAA at least partially surrounding the display area AA.

[0017] The display area AA may include multiple sub-pixels and multiple display signal lines; each sub-pixel may include electrically connected light-emitting elements and pixel circuits. Furthermore, the light-emitting elements may include light-emitting elements of different colors, such as at least one of red, green, blue, or white light-emitting elements, to achieve a color display effect on the display panel. Moreover, the light-emitting element may be an organic light-emitting diode (OLED), a micro-OLED, or a micro-LED. Taking an OLED as an example, the light-emitting element may include a first electrode, a second electrode, and an organic compound layer located between the first and second electrodes. The organic compound layer may include a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, an electron transport layer, a hole blocking layer, and an electron injection layer, but is not limited thereto. Alternatively, the organic compound layer may also include a charge-generating layer, such as a P-type charge-generating layer and an N-type charge-generating layer. When a voltage is applied to the first and second electrodes of the OLED, holes passing through the hole transport layer and electrons passing through the electron transport layer move to the light-emitting layer to form excitons, causing visible light to be emitted from the light-emitting layer. The pixel circuit may include a driving transistor that supplies current to the light-emitting element, one or more switching transistors that switch the current path between the driving transistor and the light-emitting element, and a capacitor that maintains the voltage between the gate and source of the driving transistor. The pixel circuit may, for example, be a "2T1C", "7T1C", or "8T1C" structure, where "T" represents a transistor and "C" represents a capacitor. The display signal lines may include, for example, at least one of scan signal lines and data signal lines.

[0018] Based on this, the non-display area NAA includes a bent area BA, which connects the display area AA and other areas within the non-display area NAA. The bent area BA is a bendable region. Thus, when viewed from the light-emitting side of the display panel, because a portion of the non-display area NAA is bent to the non-light-emitting side of the display panel, the bezel area of ​​the display panel can be reduced, which is beneficial for achieving a narrow bezel design and increasing the area ratio of the display area AA.

[0019] Continue to refer to Figures 3-5As shown, the display panel also includes a first substrate 11, which can be a flexible substrate or ultra-thin glass, thus facilitating good bendability of the bending region BA. Furthermore, a first opening 14 is provided in the first substrate 11, extending through the first substrate 11 along the first direction X, with at least a portion of the first opening 14 located in the bending region BA. The first opening 14 reduces the film thickness in the bending region BA, facilitating adjustment of the bending neutral plane position in the bending region BA. This allows the connection traces in the bending region BA to be positioned at or closer to the bending neutral plane, reducing the bending stress borne by the connection traces in the bending region BA. Additionally, the first opening 14 can serve as a stress relief opening, releasing the bending stress generated during the bending process of the bending region BA, reducing the bending stress borne by other film layers in the bending region BA, and ensuring the structural stability of the bending region BA.

[0020] And continue to refer to Figures 3-5 As shown, the display panel also includes an inorganic isolation layer 13, which is in contact with the first substrate 11. The inorganic isolation layer 13 isolates moisture or oxygen from the external environment from entering the display panel, ensuring that other structures in the display panel are protected from water and oxygen corrosion. Optionally, the inorganic isolation layer 13 can be made of silicon oxide or silicon nitride to ensure good water and oxygen isolation. Furthermore, since the first opening 14 in the first substrate 11 exposes part of the inorganic isolation layer 13, this embodiment further includes a protective layer 12. At least part of the protective layer 12 is located within the first opening 14 and in contact with the inorganic isolation layer 13. The protective layer 12 fills the first opening 14 and provides support, increasing the support strength in the bending region BA. The protective layer 12 also contacts the inorganic isolation layer 13, encapsulating and protecting the bending region BA and the inorganic isolation layer 13, further improving the stability of the bending region BA. Optionally, the protective layer 12 can be an organic material, such as encapsulating adhesive. The protective layer 12 enables protective bonding between different film layers in the bending area, ensuring that the structure of each film layer in the bending area BA is not easily displaced during bending, thus fully ensuring the structural stability in the bending area BA.

[0021] And continue to refer to Figures 3-5As shown, the display panel may further include a second substrate 15 located on the side of the inorganic isolation layer 13 away from the first substrate 11 in the first direction X, and a display film layer 16 located on the side of the second substrate 15 away from the first substrate 11. The second substrate 15 can be a flexible substrate or ultra-thin glass, which facilitates the bending region BA to have good bendability. Furthermore, the display film layer 16 is disposed on the side of the second substrate 15 away from the first substrate 11. The placement of the second substrate 15 can provide good support and protection for the display film layer 16 when the first substrate 11 is damaged, providing a flat and undamaged substrate for the preparation of the display film layer 16, and ensuring the structural and performance stability of the display film layer 16. Specifically, the display film layer 16 may include a driving substrate and light-emitting elements. The driving substrate may include the aforementioned pixel circuits and display signal lines.

[0022] Furthermore, refer to Figure 5 As shown, the display panel may further include an encapsulation protective layer 17, an encapsulation adhesive layer 18, and an encapsulation cover plate 19 located on the side of the display film layer 16 away from the first substrate 11 in the first direction X. The encapsulation protective layer 17 may include one or more encapsulation film layers, which may include inorganic encapsulation layers and / or organic encapsulation layers, to provide good encapsulation protection for the display film layer 16. The encapsulation adhesive layer 18 can be used to adhere the encapsulation cover plate 19 and the encapsulation protective layer 17, so that the encapsulation cover plate 19 can be stably adhered to the encapsulation protective layer 17, facilitating the encapsulation cover plate 19 to isolate and encapsulate the entire display panel from the outside environment.

[0023] It should be noted that the bending area extending to the non-light-emitting side of the display panel can be divided according to the location of the bending axis. Along the orthogonal direction of the bending axis, the bending area on one side of the bending axis bends to the non-light-emitting side of the display panel, while the bending area on the other side remains on the light-emitting side. Therefore, the partial bending area BA extending to the non-light-emitting side of the display panel can be understood as the bending area BA on one side of the bending axis bending to the non-light-emitting side of the display panel, while the bending area BA on the other side of the bending axis does not bend to the non-light-emitting side and remains on the light-emitting side of the display panel.

[0024] In summary, the display panel provided in this application reduces the bezel size by bending a portion of the bending area to the non-light-emitting side of the display panel, thus facilitating a narrow bezel display panel design. Furthermore, the first opening in the first substrate of the display panel reduces the film thickness in the bending area, which facilitates a smaller bending radius and releases bending stress generated during bending, reducing the risk of film cracking in the bending area and improving its structural and performance stability. Moreover, at least a portion of the protective layer is located within the first opening and in contact with the inorganic isolation layer, encapsulating and protecting both the bending area and the inorganic isolation layer, further enhancing the stability of the bending area.

[0025] Optionally, the Young's modulus of the protective layer 12 is less than that of the first substrate 11.

[0026] Specifically, Young's modulus is a mechanical constant characterizing the ability of a solid material to resist uniaxial elastic tensile and / or compressive deformation. A larger Young's modulus indicates greater material hardness, and a smaller Young's modulus indicates lower material hardness. In this embodiment, the Young's modulus of the protective layer 12 is smaller than that of the first substrate 11, meaning the hardness of the protective layer 12 is less than that of the first substrate 11. The protective layer 12 is also more flexible than the first substrate 11, making it easier to bend. This designation of the protective layer 12 to partially fill the first opening 14 ensures that the display panel has superior bendability in the bending region BA and better stress absorption during bending, facilitating the realization of a bendable and structurally stable display panel structure.

[0027] Optionally, the coefficient of thermal expansion of the protective layer 12 is α1, and the coefficient of thermal expansion of the inorganic isolation layer 13 is α2; wherein, 0≤(α1-α2) / α1≤1.

[0028] Specifically, materials expand and contract with temperature changes, and the coefficient of thermal expansion characterizes the relative deformation caused by a unit temperature change. In this embodiment, the coefficient of thermal expansion α1 of the protective layer 12 and the coefficient of thermal expansion α2 of the inorganic isolation layer satisfy 0 ≤ (α1-α2) / α1 ≤ 1. This means the difference between the coefficients of thermal expansion of the protective layer 12 and the inorganic isolation layer 13 is not significant, or in other words, the difference between the thermal expansion deformation of the protective layer 12 and the inorganic isolation layer 13 at high temperatures is not large. This avoids large thermal expansion deformation of the protective layer 12 at higher temperatures, preventing the thermal expansion deformation of the protective layer 12 from puncturing the inorganic isolation layer 13 and causing cracks in the inorganic isolation layer 13. In other words, it protects the inorganic isolation layer 13 from the effects of the thermal expansion deformation of the protective layer 12 at high temperatures, ensuring the structural stability of the inorganic isolation layer 13, preventing cracks, and maintaining good water and oxygen isolation.

[0029] For example, the coefficient of thermal expansion α1 of the protective layer 12 satisfies α1 < 200 ppm / ℃, that is, for every 1℃ increase in temperature, the relative elongation per unit length of the protective layer 12 is less than 200 × 10-6, so as to fully reduce the difference in thermal expansion between the protective layer 12 and the inorganic isolation layer 13, ensure that the coefficients of thermal expansion of the protective layer 12 and the inorganic isolation layer 13 are comparable or similar, protect the inorganic isolation layer 13 from the influence of the thermal expansion deformation of the protective layer 12 under high temperature environment, and ensure the structural stability between the protective layer 12 and the inorganic isolation layer 13.

[0030] For example, the coefficient of thermal expansion α1 of the protective layer 12 can be between 30-190 ppm / ℃, or between 50-150 ppm / ℃; or, the coefficient of thermal expansion α1 of the protective layer 12 can be 30 ppm / ℃, 40 ppm / ℃, 50 ppm / ℃, 60 ppm / ℃, 75 ppm / ℃, 85 ppm / ℃, 90 ppm / ℃, 100 ppm / ℃, 105 ppm / ℃, 110 ppm / ℃, 115 ppm / ℃, 125 ppm / ℃, 132 ppm / ℃, 140 ppm / ℃, 150 ppm / ℃, 160 ppm / ℃, 172 ppm / ℃, 180 ppm / ℃, 185 ppm / ℃, 192 ppm / ℃, or 198 ppm / ℃, etc. The specific coefficient of thermal expansion of the protective layer 12 is not limited in the embodiments of this application.

[0031] Optional, continue to refer to Figures 3-5As shown, the display panel also includes a support layer 20 located on the side of the first substrate 11 away from the inorganic isolation layer 13 in the first direction X. The support layer 20 has a second opening 21 that penetrates the support layer 20. At least a portion of the second opening 21 is located in the bending region BA, and in the flat state of the display panel, the second opening 21 covers the first opening 14 along the first direction X.

[0032] like Figures 3-5 As shown, the display panel also includes a support layer 20. In the first direction X, the support layer 20 is located on the side of the first substrate 11 away from the inorganic isolation layer 13. The support layer 20 is used to support the multilayer film layers in the display panel, such as the first substrate 11, the inorganic isolation layer 13, the second substrate 15, and the display film layer 16, so as to ensure the structural stability of the display panel before and after bending.

[0033] Furthermore, a second opening 21 is provided in the support layer 20, penetrating the support layer 20, and at least part of the second opening 21 is located in the bending region BA. The second opening 21 can serve as a stress relief opening, releasing the bending stress generated during the bending process of the bending region BA, reducing the bending stress borne by other film layers in the bending region BA, and ensuring the structural stability of the bending region BA. Moreover, in the flat state of the display panel, along the first direction X, the second opening 21 covers the first opening 14, meaning the opening area of ​​the second opening 21 is larger than the opening area of ​​the first opening 14, and the second opening 21 completely exposes the first opening 14. Thus, during the fabrication of the first opening 14, the first substrate 11 can be patterned through the second opening 21; that is, the support layer 20 can serve as a mask for the first opening 14, eliminating the need to add a separate mask during the fabrication of the first opening 14, ensuring a simple fabrication process and low manufacturing cost for the first opening 14.

[0034] Continue to refer to Figures 3-5As shown, the first substrate 11 includes a first substrate portion 111 and a second substrate portion 112 disposed opposite to each other, with a first opening 14 between the first substrate portion 111 and the second substrate portion 112; the support layer 20 includes a first support portion 201 and a second support portion 202 disposed opposite to each other, with a second opening 21 between the first support portion 201 and the second support portion 202; along the first direction X, the first support portion 201 is located on the side of the first substrate portion 111 away from the inorganic isolation layer 13, and the second support portion 202 is located on the side of the second substrate portion 112 away from the inorganic isolation layer 13; the first substrate portion 111 includes a portion close to the first... The first end face P1 on one side of the opening 14, the first support portion 201 includes a second end face P2 near the second opening 21; along the second direction (as shown in the figure, the Y direction, which will be used as an example in the following explanation), the distance A1 between the first end face P1 and the second end face P2 satisfies 0≤A1≤0.1mm; the second direction Y intersects the first direction X; the second substrate portion 112 includes a third end face P3 near the first opening 14, the second support portion 202 includes a fourth end face P4 near the second opening 21, and along the second direction Y, the distance A2 between the third end face P3 and the fourth end face P4 satisfies 0≤A2≤0.1mm.

[0035] Specifically, the first opening 14 penetrates the first substrate 11 in the first direction X, dividing the first substrate 11 into a first substrate portion 111 and a second substrate portion 112. In the first direction X, the first substrate portion 111 is closer to the light-emitting side of the display panel than the second substrate portion 112, and the second substrate portion 112 is closer to the non-light-emitting side of the display panel than the first substrate portion 111. The first substrate portion 111 provides support and protection for the inorganic isolation layer 13, the second substrate 15, and the display film layer 16 disposed on one side thereon, and the second substrate portion 112 provides support and protection for the inorganic isolation layer 13, the second substrate 15, and the display film layer 16 disposed on one side thereon. The second opening 21 penetrates the support layer 20 in the first direction X, dividing the support layer 20 into a first support portion 201 and a second support portion 202. In the first direction X, the first support portion 201 is closer to the light-emitting side of the display panel than the second support portion 202, and the second support portion 202 is closer to the non-light-emitting side of the display panel than the first support portion 201. The first support portion 201 provides support and protection for the first substrate portion 111, the inorganic isolation layer 13, the second substrate 15, and the display film layer 16 disposed on one side therein, and the second support portion 202 provides support and protection for the second substrate portion 112, the inorganic isolation layer 13, the second substrate 15, and the display film layer 16 disposed on one side therein.

[0036] And continue to refer to Figures 3-5As shown, the first substrate portion 111 includes a first end face P1 near the first opening 14, and the first support portion 201 includes a second end face P2 near the second opening 21. Along the second direction Y, the distance A1 between the first end face P1 and the second end face P2 satisfies 0 ≤ A1 ≤ 0.1 mm, meaning there is a reasonable distance between them along the second direction Y. Specifically, setting A1 ≥ 0 ensures that the second end face P2 can fully expose the first end face P1, thus avoiding damage to the support layer 20 during the etching process when fabricating the first opening 14 through the second opening 21. Furthermore, setting A1 ≤ 0.1 mm means that the distance between the second end face P2 and the first end face P1 in the second direction Y is relatively small, ensuring that the first support portion 201 provides good support for the first substrate portion 111.

[0037] Similarly, the second substrate portion 112 includes a third end face P3 near the first opening 14, and the second support portion 202 includes a fourth end face P4 near the second opening 21. Along the second direction Y, the distance A2 between the third end face P3 and the fourth end face P4 satisfies 0 ≤ A2 ≤ 0.1 mm, meaning there is a reasonable distance between them along the second direction Y. Specifically, setting A2 ≥ 0 ensures that the fourth end face P4 can fully expose the third end face P3, thus avoiding damage to the support layer 20 during the etching process when preparing the first opening 14 through the second opening 21. Furthermore, setting A2 ≤ 0.1 mm means that the distance between the fourth end face P4 and the third end face P3 in the second direction Y is relatively small, ensuring that the second support portion 202 provides good support for the second substrate portion 112.

[0038] For example, 0 ≤ A1 ≤ 0.1 mm, and A1 can be between 0.01 and 0.1 mm, or between 0.02 and 0.09 mm; or, A1 can be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, or 0.1 mm. This embodiment of the application does not limit the value of A1. Similarly, 0 ≤ A2 ≤ 0.1 mm, and A2 can be between 0.01 and 0.1 mm, or between 0.02 and 0.09 mm; or, A2 can be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, or 0.1 mm. This embodiment of the application does not limit the value of A2.

[0039] Optional, continue to refer to Figures 3-5As shown, the thickness of the protective layer 12 is greater than the thickness of the first substrate 11. At this time, the protective layer 12 can play a good supporting role, ensuring the stability of the bending area BA and the entire display panel structure.

[0040] It should be noted that when the thickness of the protective layer 12 is greater than the thickness of the first substrate 11, in order to ensure good bendability of the bending area BA, the protective layer 12 can be cured after partially bending the bending area BA along the bending axis to the non-light-emitting side of the display panel. That is, during the bending process of the bending area BA, the protective layer 12 remains in a non-cured or uncured state. At this time, the protective layer 12 is in a fluid or semi-fluid state, with a low Young's modulus, low bending resistance, and good stress absorption effect, ensuring good bendability of the bending area BA. After the bending area BA is completed, the protective layer 12 is cured. The cured protective layer 12 has a larger thickness, providing good support for the bending area BA and the display panel, ensuring the stability of the bending area BA and the entire display panel structure. Alternatively, the protective layer 12 can be prepared after the bending area BA is bent along the bending axis to the non-light-emitting side of the display panel. That is, during the bending process of the bending area BA, there is no protective layer, which can reduce the bending resistance and ensure that the bending area BA has good bendability.

[0041] It is understandable that whether the protective layer 12 is prepared before bending the bending region BA and then cured after bending, or whether the protective layer 12 is prepared after bending the bending region BA, the bending resistance of the protective layer 12 to the bending region BA is relatively small. Therefore, the selection of the Young's modulus of the protective layer 12 has a large degree of freedom. For example, the Young's modulus of the protective layer 12 is E1, and the Young's modulus of the first substrate 11 is E2; where 0.02 < E1 / E2 < 0.25. That is to say, the Young's modulus of the protective layer 12 is smaller than that of the first substrate 11, but the Young's modulus of the protective layer 12 has a large selection space. A reasonable material for preparing the protective layer 12 can be selected according to actual needs, and the material selection of the protective layer 12 has a large degree of freedom.

[0042] For example, taking the first substrate 11 with a Young's modulus of 9000 MPa as an example, the protective layer 12 can be made of a material with a Young's modulus between 180 MPa and 2250 MPa, and the selection of the Young's modulus of the protective layer 12 has a large degree of freedom.

[0043] Continue to refer to Figures 3-5As shown, the display panel also includes a support layer 20 located on the side of the first substrate 11 away from the inorganic isolation layer 13 in the first direction X. The support layer 20 has a second opening 21 that penetrates the support layer 20. At least a portion of the second opening 21 is located in the bending region BA, and in the flat state of the display panel, the second opening 21 covers the first opening 14 along the first direction X. At least a portion of the protective layer 12 is located within the second opening 21.

[0044] like Figures 3-5 As shown, the display panel also includes a support layer 20. In the first direction X, the support layer 20 is located on the side of the first substrate 11 away from the inorganic isolation layer 13. The support layer 20 is used to support the multilayer film layers in the display panel, such as the first substrate 11, the inorganic isolation layer 13, the second substrate 15, and the display film layer 16, so as to ensure the structural stability of the display panel before and after bending.

[0045] Furthermore, a second opening 21 is provided in the support layer 20, penetrating the support layer 20, and at least part of the second opening 21 is located in the bending region BA. The second opening 21 can serve as a stress relief opening, releasing the bending stress generated during the bending process of the bending region BA, reducing the bending stress borne by other film layers in the bending region BA, and ensuring the structural stability of the bending region BA. Moreover, in the flat state of the display panel, along the first direction X, the second opening 21 covers the first opening 14, meaning the opening area of ​​the second opening 21 is larger than the opening area of ​​the first opening 14, and the second opening 21 completely exposes the first opening 14. Thus, during the fabrication of the first opening 14, the first substrate 11 can be patterned through the second opening 21; that is, the support layer 20 can serve as a mask for the first opening 14, eliminating the need to add a separate mask during the fabrication of the first opening 14, ensuring a simple fabrication process and low manufacturing cost for the first opening 14.

[0046] Furthermore, at least a portion of the protective layer 12 is located within the second opening 21, ensuring that the protective layer 12 has sufficient thickness to provide good support for the bending area BA and the entire display panel after curing. The protective layer 12 fills the first opening 14 and the second opening 21, and can be prepared by dispensing or potting adhesive into these openings. By accommodating the protective layer 12 within the first and second openings 14 and 21, the space occupied by the protective layer 12 outside these openings is reduced, ensuring that the relatively thick protective layer 12 does not increase the bending radius of the bending area BA, thus facilitating the design of a small-volume, thin display panel.

[0047] Continue to refer to Figure 4 and Figure 5As shown, the support layer 20 includes a first support portion 201 and a second support portion 202 disposed opposite to each other, with a second opening 21 between the first support portion 201 and the second support portion 202; the first support portion 201 includes a second end face P2 on the side near the second opening 21 in the second direction Y and a fifth end face P5 on the side away from the inorganic isolation layer 13 in the first direction X; the second support portion 202 includes a fourth end face P4 on the side near the second opening 21 in the second direction Y and a sixth end face P6 on the side away from the inorganic isolation layer 13 in the first direction X; the second direction Y intersects with the first direction X; the protective layer 12 covers the second end face P2, the fourth end face P4, part of the fifth end face P5 and part of the sixth end face P6.

[0048] like Figure 4 and Figure 5 As shown, the second opening 21 penetrates the support layer 20 in the first direction X, dividing the support layer 20 into a first support portion 201 and a second support portion 202. In the first direction X, the first support portion 201 is closer to the light-emitting side of the display panel than the second support portion 202, and the second support portion 202 is closer to the non-light-emitting side of the display panel than the first support portion 201. The first support portion 201 provides support and protection for the first substrate portion 111, the inorganic isolation layer 13, the second substrate 15, and the display film layer 16 disposed on one side therein, and the second support portion 202 provides support and protection for the second substrate portion 112, the inorganic isolation layer 13, the second substrate 15, and the display film layer 16 disposed on one side therein.

[0049] Furthermore, the first support portion 201 includes a second end face P2 on the side near the second opening 21 in the second direction Y, and a fifth end face P5 on the side away from the inorganic isolation layer 13 in the first direction X, so as to... Figure 4 and Figure 5 Taking the orientation shown as an example, the second end face P2 can be the left end face of the first support portion 201, and the fifth end face P5 can be the lower end face of the first support portion 201. The second support portion 202 includes a fourth end face P4 on the side closer to the second opening 21 in the second direction Y and a sixth end face P6 on the side farther from the inorganic isolation layer 13 in the first direction X. Figure 4 and Figure 5Taking the orientation shown as an example, the fourth end face P4 can be the left end face of the second support portion 202, and the sixth end face P6 can be the upper end face of the second support portion 202. Furthermore, the protective layer 12 covers the second end face P2, the fourth end face P4, part of the fifth end face P5, and part of the sixth end face P6. That is, the protective layer 12 covers the left end face and part of the lower end face of the first support portion 201, and simultaneously covers the left end face and part of the upper end face of the second support portion 202. This ensures that the protective layer 12 can rely on the support layer 20 to provide support, improving the compressive strength of the protective layer 12 and enhancing the structural stability of the bending area BA and the entire display panel.

[0050] Continue to refer to Figure 4 and Figure 5 As shown, along the second direction Y, the coverage length B1 of the protective layer 12 on the fifth end face P5 satisfies B1 > 0.05 mm; along the second direction Y, the coverage length B2 of the protective layer 12 on the sixth end face P6 satisfies B2 > 0.05 mm. This ensures that the protective layer 12 has sufficient coverage length on the fifth end face P5 and the sixth end face P6, ensuring that the protective layer 12 has sufficient contact area with the fifth end face P5 and the sixth end face P6, ensuring that the support layer 20 can provide sufficient support force for the protective layer 12, and fully ensuring the compressive strength of the protective layer 12 and the structural stability of the bending area BA.

[0051] Continue to refer to Figure 4 and Figure 5 As shown, the display panel also includes a support structure 22. Along the first direction X, the support structure 22 is located on the side of the support layer 20 away from the inorganic isolation layer 13. Along the second direction Y, the support structure 22 includes a seventh end face P7 near the bending area, and there is a gap between the protective layer 12 and the seventh end face P7.

[0052] Specifically, the display panel may also include a support structure 22. The support structure 22 may include a laminated mesh adhesive, foam, and a metal conductive layer. The mesh adhesive is used to bond the foam and the support layer 20. The foam can absorb stress, and the metal conductive layer, for example, can be copper foil, which can provide support and release static electricity. The support structure 22 is disposed between the first support portion 201 and the second support portion 202, that is, the support structure 22 is located on the side of the first support portion 201 away from the inorganic isolation layer 13 and on the side of the second support portion 202 away from the inorganic isolation layer 13. The arrangement of the support structure 22 fully absorbs the bending stress and external forces on the display panel and releases static electricity in the display panel, ensuring the structural stability and performance stability of the display panel.

[0053] Furthermore, along the second direction Y, the support structure 22 includes a seventh end face P7 near the bending area. A gap exists between the protective layer 12 and the seventh end face P7, meaning the protective layer 12 does not completely fill the bending gap between the inorganic isolation layer 13 and the support structure 22. In this case, a dispensing process can be used to prepare the protective layer 12 in the first opening 14 and the second opening 21, without the need for strict control of the dispensing amount in the preparation process of the protective layer 12, thus reducing the processing difficulty of the protective layer 12. Simultaneously, the gap between the protective layer 12 and the seventh end face P7 can also prevent the protective layer 12 from overflowing during bending, ensuring the stability of the display area structure on the one hand, and reducing the dispensing amount of the protective layer 12 on the other, thereby reducing the preparation cost of the protective layer 12.

[0054] Optional, Figure 6 yes Figure 2 A schematic diagram of another cross-sectional structure of the display panel along section line B-B'. Figure 7 yes Figure 2 A schematic diagram of another cross-sectional structure of the display panel along section line B-B', combined with... Figure 6 and Figure 7 As shown, the display panel also includes a support structure 22. Along the first direction, the support structure 22 is located on the side of the support layer 20 away from the inorganic isolation layer 13. Along the second direction Y, the support structure 22 includes a seventh end face P7 near the bending area, and the protective layer 12 covers the seventh end face P7.

[0055] Specifically, the display panel may also include a support structure 22. The support structure 22 may include a laminated mesh adhesive, foam, and a metal conductive layer. The mesh adhesive is used to bond the foam and the support layer 20. The foam can absorb stress, and the metal conductive layer, for example, can be copper foil, which can provide support and release static electricity. The support structure 22 is disposed between the first support portion 201 and the second support portion 202, that is, the support structure 22 is located on the side of the first support portion 201 away from the inorganic isolation layer 13 and on the side of the second support portion 202 away from the inorganic isolation layer 13. The arrangement of the support structure 22 fully absorbs the bending stress and external forces on the display panel and releases static electricity in the display panel, ensuring the structural stability and performance stability of the display panel.

[0056] Furthermore, along the second direction Y, the support structure 22 includes a seventh end face P7 near the bending area, and the protective layer 12 covers the seventh end face P7. This means there is no gap between the protective layer 12 and the seventh end face P7, thus the protective layer 12 completely fills the bending gap between the inorganic isolation layer 13 and the support structure 22. This provides the protective layer 12 with support and protection for the bending area BA. Moreover, the protective layer 12 covering the seventh end face P7 prevents moisture or oxygen from entering the display panel through the gap between the protective layer 12 and the seventh end face P7, improving the display panel's resistance to water and oxygen corrosion.

[0057] For example, a protective layer 12 is provided to cover the seventh end face P7. At this time, a potting process can be used to inject the protective layer 12 into the bending gap between the inorganic isolation layer 13 and the support structure 22 to ensure that the protective layer 12 completely fills the bending gap between the inorganic isolation layer 13 and the support structure 22.

[0058] And continue to refer to Figure 7 As shown, while the protective layer 12 is injected into the bending gap between the inorganic isolation layer 13 and the support structure 22 using the potting process, the material of the protective layer can also be injected into the outer side of the display film layer 16 using the potting process. In this way, the protective layer 12 can simultaneously encapsulate and protect the inner side of the display film layer 16 near the support structure 22 and the outer side of the display film layer 16 away from the support structure 22, further improving the structural stability of the bending area BA and the entire display panel.

[0059] Optional, Figure 8 yes Figure 1 The diagram shows another cross-sectional structure of the display panel along section line A-A'. Figure 9 yes Figure 2 A schematic diagram of another cross-sectional structure of the display panel along section line B-B'. Figure 10 yes Figure 2 A schematic diagram of another cross-sectional structure of the display panel along section line B-B', combined with... Figures 8-10 As shown, the thickness of the protective layer 12 is less than the thickness of the first substrate 11.

[0060] Specifically, due to the small thickness of the protective layer 12, its addition has a limited impact on increasing bending stress. Furthermore, the thickness of the protective layer 12 is less than that of the first substrate 11. Compared to a design without the first opening 14 in the first substrate 11, adding the protective layer 12 can also reduce the film thickness in the bending region BA, facilitating the adjustment of the bending neutral plane position in the bending region BA. This allows the connection traces in the bending region BA to be positioned at or closer to the bending neutral plane, reducing the bending stress borne by the connection traces in the bending region BA. Moreover, by filling the first opening 14, the protective layer 12 provides support, enhancing the support strength in the bending region BA. Additionally, the protective layer 12 contacts the inorganic isolation layer 13, encapsulating and protecting both the bending region BA and the inorganic isolation layer 13, further improving the stability of the bending region BA. Optionally, the protective layer 12 can be an encapsulating adhesive. The protective layer 12 can achieve protective bonding between different film layers in the bending area, ensuring that the structure of each film layer in the bending area BA is not easily displaced during bending, and fully ensuring the structural stability in the bending area BA.

[0061] Optionally, if the thickness of the protective layer 12 is less than the thickness of the first substrate 11, the protective layer 12 can be cured before bending in the bending region BA. In this case, since the thickness of the protective layer 12 is small, the increase in bending stress due to the protective layer 12 is limited. Of course, the protective layer 12 can also be cured after bending in the bending region BA, thus significantly reducing bending resistance and ensuring good bendability of the bending region BA.

[0062] It is understandable that, regardless of whether the protective layer 12 is cured before or after bending the BA, considering the impact of the protective layer 12 on the bendability of the BA and its subsequent stress absorption effect, the protective layer 12 can be designed to have a relatively small Young's modulus. For example, the Young's modulus of the protective layer 12 is E1, and the Young's modulus of the first substrate 11 is E2; where E1 / E2 < 0.00025. That is, the Young's modulus of the protective layer 12 is much smaller than that of the first substrate 11. Therefore, whether the protective layer 12 is cured before or after bending the BA, the increase in bending stress due to the protective layer 12 is limited, ensuring that the display panel has good bendability in the BA.

[0063] For example, taking the first substrate 11 with a Young's modulus of 9000 MPa as an example, the protective layer 12 can be made of a material with a Young's modulus of less than 2.25 MPa to ensure that the protective layer 12 has a small Young's modulus and to ensure that the display panel has good bendability in the bending area BA.

[0064] Optional, Figure 11 This is a structural schematic diagram of another display panel provided in the embodiments of this application, specifically a structural schematic diagram of the display panel before the bending area is bent to the non-light-emitting side of the display panel, that is, a structural schematic diagram of the display panel in a flat state; Figure 12 This is a schematic diagram of another display panel structure provided in the embodiments of this application, specifically a schematic diagram of the structure before the bending area is bent to the non-light-emitting side of the display panel, that is, a schematic diagram of the structure of the display panel in a flat state; combined with Figure 11 and Figure 12 As shown, the bending area BA includes a first bending area BA1 and a second bending area BA2; along the second direction Y, the first bending area BA1 is located on one side of the display area AA; along the third direction Z, the second bending area BA2 is located on one side of the display area AA; the second direction Y and the third direction Z intersect and both intersect with the first direction X.

[0065] like Figure 11 and Figure 12 As shown, the bending area BA includes a first bending area BA1 and a second bending area BA2. At least a portion of the first bending area BA1 is bent to the non-light-emitting side of the display panel, and at least a portion of the second bending area BA2 is bent to the non-light-emitting side of the display panel. Thus, when viewed from the light-emitting side of the display panel, since a portion of the first bending area BA1 and a portion of the second bending area BA2 are bent to the non-light-emitting side of the display panel, the bezel area of ​​the display panel can be reduced, which is beneficial for realizing a narrow bezel design of the display panel and increasing the area ratio of the display area AA.

[0066] Furthermore, along the second direction Y, the first bending area BA1 is located on one side of the display area AA, and along the third direction Z, the second bending area BA2 is located on one side of the display area AA. The second direction Y and the third direction Z intersect and both intersect the first direction X. That is, bending areas are respectively provided on both sides of the two straight edge areas whose extension directions intersect in the display area AA. Compared to related technologies where bending areas are only provided at the location of one straight edge area, the bezel area of ​​the display panel can be further reduced. Furthermore, continuing to refer to... Figure 11 and Figure 12 As shown, along the third direction Z, a first circuit setting area CSA1 is provided on the side of the second bending area BA2 away from the display area AA. A driving circuit, such as a gate driving circuit, can be set in the first circuit setting area CSA1. The first circuit setting area CSA1 bends along the second bending area BA2 to the non-light emitting side of the display panel. Thus, the driving circuit set in the first circuit setting area CSA1 will be bent to the non-light emitting side of the display panel and will not occupy the area of ​​the light emitting side of the display panel, further increasing the area ratio of the display area AA.

[0067] And continue to refer to Figure 11As shown, the bending area BA may also include a third bending area BA3, with at least a portion of the third bending area BA3 bent to the non-light-emitting side of the display panel. This further reduces the bezel area of ​​the display panel, facilitating a narrow bezel design and increasing the area ratio of the display area AA. Furthermore, as... Figure 11 As shown, along the third direction Z, a second circuit setting area CSA2 is provided on the side of the third bending area BA3 away from the display area AA. A driving circuit, such as a gate driving circuit, can be set in the second circuit setting area CSA2. The second circuit setting area CSA2 bends along the third bending area BA3 to the non-light emitting side of the display panel. Thus, the driving circuit set in the second circuit setting area CSA2 will be bent to the non-light emitting side of the display panel and will not occupy the area of ​​the light emitting side of the display panel, further increasing the area ratio of the display area AA.

[0068] It is understandable that the display panel may also include a fourth bending area along the second direction Y, the fourth bending area being located on one side of the display area; and along the second direction Y, the fourth bending area and the first bending area may be located on opposite sides of the display area, thus realizing a display panel that can be bent on all four sides, further reducing the bezel area of ​​the display panel, which is conducive to realizing a narrow bezel design of the display panel.

[0069] Based on the same inventive communication, this application also provides a method for manufacturing a display panel, which can be used to manufacture the display panel described in the above embodiments. Specifically, Figure 13 This is a schematic flowchart illustrating a method for manufacturing a display panel according to an embodiment of this application. Figure 14 yes Figure 13 The process steps corresponding to the preparation method shown are as follows: Figure 13 and Figure 14 As shown, the method for manufacturing a display panel provided in this application includes: S110. A display panel is provided, the display panel including a first substrate and an inorganic isolation layer; the inorganic isolation layer is located on one side of the first substrate along a first direction; the first direction is the thickness direction of the display panel.

[0070] like Figure 14As shown in step a, a display panel is provided. The display panel may include a first substrate 11, an inorganic isolation layer 13, a second substrate 15, and a display film layer 16 stacked in a first direction X. The first substrate 11 can be a flexible substrate or ultra-thin glass, which facilitates good bendability of the bending area BA. The inorganic isolation layer 13 can be in contact with the first substrate 11, and the inorganic isolation layer 13 isolates water vapor or oxygen from the external environment from entering the display panel, ensuring that other structures in the display panel are protected from water and oxygen corrosion. Optionally, the material of the inorganic isolation layer 13 can be silicon oxide or silicon nitride to ensure good water and oxygen isolation effect. The second substrate 15 can be a flexible substrate or ultra-thin glass, which facilitates good bendability of the bending area BA. Furthermore, the display film layer 16 is disposed on the side of the second substrate 15 away from the first substrate 11. The placement of the second substrate 15 can provide good support and protection for the display film layer 16 when the first substrate 11 is damaged, providing a flat and undamaged substrate for the fabrication of the display film layer 16 and ensuring the structural and performance stability of the display film layer 16. Specifically, the display film layer 16 may include a driving substrate and light-emitting elements. The driving substrate may include pixel circuits and display signal lines.

[0071] S120. A first opening is prepared in the first substrate, the first opening penetrating the first substrate along a first direction and exposing a portion of the inorganic isolation layer.

[0072] like Figure 14 As shown in step b, a first opening 14 is fabricated in the first substrate 11. This can be achieved by patterning the first substrate 11. The first opening 14 extends through the first substrate 11 along the first direction X. The presence of the first opening 14 reduces the film thickness of the display panel in its location, facilitating adjustment of the bending neutral plane position during subsequent bending. This allows the connecting traces in the bending area to be positioned at or closer to the bending neutral plane, reducing the bending stress borne by the connecting traces during subsequent bending. Furthermore, the first opening 14 serves as a stress-relieving opening, releasing the bending stress generated during subsequent bending in the bending area, reducing the bending stress borne by other film layers in the bending area, and ensuring the structural stability of the bending area.

[0073] S130, Prepare a protective layer at least in the first opening and bend a portion of the display panel to the non-light-emitting side of the display panel at the location of the first opening.

[0074] like Figure 14As shown in step c, a protective layer 12 is prepared at least in the first opening 14, meaning at least a portion of the protective layer 12 is located within the first opening 14. The protective layer 12 fills the first opening 14, providing support and enhancing the support strength of the bending region BA. Furthermore, the protective layer 12 contacts the inorganic isolation layer 13, encapsulating and protecting both the bending region BA and the inorganic isolation layer 13, further improving the stability of the bending region BA. Optionally, the protective layer 12 can be an encapsulating adhesive, achieving protective bonding between different film layers in the bending region, ensuring that the film layer structures in the bending region BA are not easily displaced during bending, and fully guaranteeing the structural stability of the bending region BA.

[0075] Furthermore, the display panel can be bent at the first opening 14 after the material for the protective layer 12 is filled, and then the protective layer 12 can be cured to avoid affecting the bendability of the display panel. Alternatively, the display panel can be bent at the first opening 14 after the protective layer 12 is formed. The protective layer 12 provides protective adhesion between different film layers in the bending area, ensuring that the structure of each film layer in the bending area BA does not easily shift during bending, thus fully guaranteeing the structural stability in the bending area BA. Alternatively, the material for the protective layer 12 can be poured into the first opening 14 after bending the display panel at the first opening 14. Specific implementation methods will be explained later.

[0076] In summary, the fabrication method provided in this application, by fabricating a first opening in a first substrate and bending the display panel at the location of the first opening, can reduce the film thickness in the bending region. This facilitates a reduction in the bending radius and, through the first opening, releases the bending stress generated during bending, reducing the risk of film cracking in the bending region and improving the structural and performance stability of the bending region. Furthermore, a protective layer is fabricated at least within the first opening, and this protective layer is in contact with the inorganic isolation layer. The protective layer encapsulates and protects both the bending region and the inorganic isolation layer, further enhancing the stability of the bending region.

[0077] Optional, Figure 15 This is a flowchart of another method for manufacturing a display panel provided in an embodiment of this application. Figure 16 yes Figure 15 The process steps corresponding to the preparation method shown are illustrated in the diagram. Figure 15 and Figure 16 Based on the above embodiments, a detailed explanation of how to fabricate the first opening in the first substrate is provided. For example... Figure 15 and Figure 16 As shown, the method for manufacturing a display panel provided in this application includes: S210. A display panel is provided, the display panel including a first substrate and an inorganic isolation layer; the inorganic isolation layer is located on one side of the first substrate along a first direction; the first direction is the thickness direction of the display panel.

[0078] like Figure 16 Step a is shown in the diagram.

[0079] S220, Irradiate the first substrate with a first laser to reduce the adhesion between the first substrate and the inorganic isolation layer.

[0080] like Figure 16 As shown in step b, the first substrate 11 is irradiated with a first laser. The first laser can be understood as a laser that will not damage the first substrate 11. However, the first laser can reduce the adhesion between the first substrate 11 and the inorganic isolation layer 13.

[0081] And, as Figure 16 As shown in step b, the display panel may further include a support layer 20 located on the side of the first substrate 11 away from the inorganic isolation layer 13, and the support layer 20 has a second opening 21. The support layer 20 can be used as a mask for the patterning process of the first substrate 11, that is, the first substrate 11 is irradiated by a first laser through the second opening 21.

[0082] For example, the first laser may include an infrared laser, or for instance, a carbon dioxide laser.

[0083] S230, Irradiate the first substrate with a second laser to form a fracture in the first substrate; the first substrate has a greater absorption rate of the second laser than the first laser.

[0084] like Figure 16 As shown in step c, the first substrate 11 is irradiated with a second laser. The absorption rate of the second laser by the first substrate 11 is greater than that of the first laser. As a result, after the first substrate 11 absorbs more of the second laser, a fracture will be generated in the first substrate 11.

[0085] For example, the second laser may include an ultraviolet laser.

[0086] S240, Remove the first substrate surrounding the break to form a first opening in the first substrate.

[0087] Specifically, removing the first substrate surrounding the break to form a first opening in the first substrate may include: An adhesive layer is attached to the surface of the first substrate surrounding the fracture, and the adhesion force between the adhesive layer and the first substrate is greater than the adhesion force between the first substrate and the inorganic isolation layer; An adhesive layer is used to remove the first substrate surrounding the fracture to form a first opening in the first substrate.

[0088] like Figure 16 As shown in step d, an adhesion layer 23 is attached to the surface of the first substrate 11 surrounding the fracture, and the adhesion force between the adhesion layer 23 and the first substrate 11 is greater than the adhesion force between the first substrate 11 and the inorganic isolation layer 13.

[0089] For example, the adhesive layer 23 can be an easy-tear sticker.

[0090] like Figure 16 As shown in step e, the first substrate 11 surrounding the break is removed using the adhesion layer 23 to form a first opening 14 in the first substrate 11.

[0091] S250, Prepare a protective layer at least in the first opening and bend a portion of the display panel to the non-light-emitting side of the display panel at the location of the first opening.

[0092] like Figure 16 Step f in the diagram is shown.

[0093] In summary, the process involves using a first laser to irradiate the first substrate to reduce the adhesion between the first substrate and the inorganic isolation layer. Then, taking advantage of the first substrate's high absorption capacity for the second laser, the second laser is used to irradiate the first substrate to form a fracture. Finally, an adhesion layer with strong adhesion to the first substrate is used to remove a portion of the first substrate, forming a first opening within it. This method provides a simple and reliable process for forming the first opening, ensuring precise positioning of the opening without damaging other film layers, thus guaranteeing good structural stability of the display panel.

[0094] Optional, Figure 17 This is a schematic flowchart illustrating another method for manufacturing a display panel provided in an embodiment of this application. Figure 18 yes Figure 17 The preparation method shown corresponds to a process step diagram. Figure 19 yes Figure 17 The diagram shows another process step corresponding to the preparation method shown. Figure 17 , Figure 18 and Figure 19 Based on the above embodiments, a detailed explanation is provided on how to prepare a protective layer in the first opening and how to bend a portion of the display panel to the non-light-emitting side of the display panel at the location of the first opening. For example... Figure 17 , Figure 18 and Figure 19 As shown, the method for manufacturing a display panel provided in this application includes: S310. A display panel is provided, the display panel including a first substrate and an inorganic isolation layer; the inorganic isolation layer is located on one side of the first substrate along a first direction; the first direction is the thickness direction of the display panel.

[0095] like Figure 18 Step a in the middle and Figure 19 Step a is shown in the diagram.

[0096] S320. A first opening is prepared in the first substrate, the first opening penetrating the first substrate along a first direction and exposing a portion of the inorganic isolation layer.

[0097] like Figure 18 Step b in the middle and Figure 19 Step b is shown in the diagram.

[0098] S330, Fill the first opening with a protective layer material; the Young's modulus of the protective layer material is less than the Young's modulus of the first substrate.

[0099] like Figure 18 Step c and Figure 19 As shown in step c, a protective layer material 12' is filled into the first opening 14, with the protective layer material 12' at least partially located within the first opening 14. Figure 18 Step c in the example is taken with the protective layer material 12' located inside the first opening 14. Figure 19 Step c is illustrated using the example of the protective layer material 12' being located inside or outside the first opening 14.

[0100] Furthermore, the Young's modulus of the protective layer material 12' is less than that of the first substrate 11, and at this time the protective layer material 12' has not yet been cured. The protective layer material 12' is in a fluid or semi-fluid state, and the influence of the protective layer material 12' on the bendability of the display panel when it is subsequently bent at the first opening 14 is negligible.

[0101] S340, bend part of the display panel at the position of the first opening to the non-light-emitting side of the display panel.

[0102] like Figure 18 Step d and Figure 19 As shown in step d, the display panel is bent to the non-light-emitting side of the display panel at the position of the first opening 14. Because the setting of the first opening 14 reduces the bending stress and can release the bending stress, the display panel has good bendability.

[0103] S350, The protective layer material is cured to prepare a protective layer, at least a portion of which is located within the first opening.

[0104] like Figure 18 Step e and Figure 19 As shown in step e, the protective layer material 12' is cured to prepare the protective layer 12, at least a portion of the protective layer 12 being located within the first opening 14. Figure 18The explanation will be based on the example where all the protective layers 12 are located within the first opening 14; that is, the explanation will be based on the example where the thickness of the protective layer 12 is less than the thickness of the first substrate 11. Figure 19 The explanation will be based on the example where part of the protective layer 12 is located inside the first opening 14 and part of the protective layer 12 is located outside the first opening 14; that is, the explanation will be based on the example where the thickness of the protective layer 12 is greater than the thickness of the first substrate 11.

[0105] In summary, by first filling the first opening with protective layer material and then curing the protective layer material after the display panel is bent, the protective layer can be reduced in its impact on the bendability of the display panel. This ensures that the protective layer material, which is in a fluid or semi-fluid state, will not affect the bendability of the display panel, thus guaranteeing good bendability of the display panel.

[0106] Optional, Figure 20 This is a schematic flowchart of another method for manufacturing a display panel provided in an embodiment of this application. Figure 21 yes Figure 20 The process steps corresponding to the preparation method shown are illustrated in the diagram. Figure 20 and Figure 21 Based on the above embodiments, a detailed explanation is provided on how to prepare a protective layer in the first opening and how to bend a portion of the display panel to the non-light-emitting side of the display panel at the location of the first opening. For example... Figure 20 and Figure 21 As shown, the method for manufacturing a display panel provided in this application includes: S410. A display panel is provided, the display panel including a first substrate and an inorganic isolation layer; the inorganic isolation layer is located on one side of the first substrate along a first direction; the first direction is the thickness direction of the display panel.

[0107] like Figure 21 Step a is shown in the diagram.

[0108] S420. A first opening is prepared in the first substrate, the first opening penetrating the first substrate along a first direction and exposing a portion of the inorganic isolation layer.

[0109] like Figure 21 Step b is shown in the diagram.

[0110] S430, Fill the first opening with a protective layer material; the Young's modulus of the protective layer material is less than the Young's modulus of the first substrate.

[0111] like Figure 21 As shown in step c, a protective layer material 12' is filled into the first opening 14. The protective layer material 12' is located in the first opening 14, that is, the filling amount of the protective layer material 12' is small, which is beneficial to achieving a thinner protective layer.

[0112] Furthermore, the Young's modulus of the protective layer material 12' is less than that of the first substrate 11, so the protective layer material 12' has a smaller impact on the bendability of the display panel when it is subsequently bent at the first opening 14.

[0113] S440. The protective layer material is cured to prepare a protective layer, which is located inside the first opening and the thickness of the protective layer is less than the thickness of the first substrate.

[0114] like Figure 21 As shown in step d, the protective layer material 12' is cured to prepare the protective layer 12. The protective layer 12 is located within the first opening 14. That is, the explanation is based on the example that the thickness of the protective layer 12 is less than the thickness of the first substrate 11.

[0115] By setting the thickness of the protective layer 12 to be less than the thickness of the first substrate 11, and the Young's modulus of the protective layer 12 to be less than that of the first substrate 11, compared to the scheme without the first opening 14 in the first substrate 11, adding the protective layer 12 can also reduce the film thickness in the bending region BA. This facilitates adjusting the position of the bending neutral surface in the bending region BA, allowing the connection traces in the bending region BA to be positioned at or closer to the bending neutral surface, thus reducing the bending stress borne by the connection traces in the bending region BA. Furthermore, by filling the first opening 14, the protective layer 12 provides support, improving the support strength in the bending region BA. Additionally, the protective layer 12 contacts the inorganic isolation layer 13, encapsulating and protecting both the bending region BA and the inorganic isolation layer 13, further enhancing the stability of the bending region BA.

[0116] S450, bend part of the display panel at the position of the first opening to the non-light-emitting side of the display panel.

[0117] like Figure 21 As shown in step e, the display panel is bent to the non-light-emitting side of the display panel at the position of the first opening 14. Because the setting of the first opening 14 reduces the bending stress and can release the bending stress, the display panel has good bendability.

[0118] In summary, by first filling the first opening with a protective layer material, curing the protective layer material before bending the display panel, and then bending the display panel, the protective layer's thickness and Young's modulus are less than those of the first substrate, thus limiting its impact on the bending performance of the bending area. Furthermore, the protective layer can be an encapsulating adhesive, achieving protective bonding between different film layers in the bending area, ensuring that the film layer structures in the bending area are not easily displaced during bending, and fully guaranteeing structural stability in the bending area.

[0119] Optional, Figure 22 This is a schematic flowchart of another method for manufacturing a display panel provided in an embodiment of this application. Figure 23 yes Figure 22 The process steps corresponding to the preparation method shown are illustrated in the diagram. Figure 22 and Figure 23 Based on the above embodiments, a detailed explanation is provided on how to prepare a protective layer in the first opening and how to bend a portion of the display panel to the non-light-emitting side of the display panel at the location of the first opening. For example... Figure 22 and Figure 23 As shown, the display panel provided in this application embodiment may further include a support structure 22, and the manufacturing method of the display panel provided in this application embodiment includes: S510. A display panel is provided, the display panel including a first substrate and an inorganic isolation layer; along a first direction, the inorganic isolation layer is located on one side of the first substrate; the first direction is the thickness direction of the display panel.

[0120] like Figure 23 Step a is shown in the diagram.

[0121] S520. A first opening is prepared in the first substrate, the first opening penetrating the first substrate along a first direction and exposing a portion of the inorganic isolation layer.

[0122] like Figure 23 Step b is shown in the diagram.

[0123] S530, bend part of the display panel at the position of the first opening to the non-light-emitting side of the display panel.

[0124] like Figure 23 As shown in step c, the display panel is bent to the non-light-emitting side of the display panel at the position of the first opening 14. Because the setting of the first opening 14 reduces the bending stress and can release the bending stress, the display panel has good bendability.

[0125] S540. A protective layer material is filled between the bent inorganic isolation layer and the supporting structure.

[0126] like Figure 23 As shown in step d, a protective layer material 12' is filled between the bent inorganic isolation layer 13 and the support structure 22. Specifically, the protective layer material 12' can be filled between the bent inorganic isolation layer 13 and the support structure 22 by potting adhesive to ensure that the protective layer material 12' fully fills the space between the bent inorganic isolation layer 13 and the support structure 22. This allows the protective layer obtained after subsequent curing to cover the side of the support structure 22 near the bending area, preventing moisture or oxygen from entering the display panel.

[0127] S550, a protective layer is prepared by curing the protective layer material, and the protective layer covers the end face of the support structure near the bending area.

[0128] like Figure 23 As shown in step e, the protective layer material 12' is cured to prepare the protective layer 12. The protective layer 12 covers the end face of the support structure 22 near the bending area BA, preventing water vapor or oxygen from entering the display panel from the gap between the protective layer 12 and the support structure 22, thus ensuring good water and oxygen barrier effect of the display panel.

[0129] In summary, by first setting a protective layer material in the space between the inorganic isolation layer and the support structure after the display panel is bent and then curing it, a protective layer is obtained. This ensures that the protective layer can cover the end face of the support structure near the bending area, thus preventing water vapor or oxygen from entering the display panel from the gap between the protective layer and the support structure, and ensuring good water and oxygen barrier effect of the display panel.

[0130] Based on the same inventive concept, this application also provides a display device. Figure 24 This is a schematic diagram of the structure of a display device provided in an embodiment of this application, such as... Figure 24 As shown, the display device 1 includes the display panel of any of the above embodiments. Therefore, the display device provided in this application has the corresponding beneficial effects of the above embodiments, which will not be repeated here. The display device can be an electronic device such as a mobile phone, computer, smart wearable device (e.g., smartwatch), and in-vehicle display device.

[0131] Obviously, the above embodiments of this application are merely examples for clear illustration and are not intended to limit the implementation of this application. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the scope of protection of this application. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A display panel, characterized in that, It includes a display area and a non-display area, wherein the non-display area includes a bent area located on at least one side of the display area, and a portion of the bent area is bent to the non-light-emitting side of the display panel; The display panel further includes a first substrate, a protective layer, and an inorganic isolation layer, wherein the inorganic isolation layer is located on one side of the first substrate along a first direction; the first direction is the thickness direction of the display panel. The first substrate has a first opening, which penetrates the first substrate along the first direction and exposes a portion of the inorganic isolation layer, and at least a portion of the first opening is located in the bending region; At least a portion of the protective layer is located within the first opening and is in contact with the inorganic isolation layer.

2. The display panel according to claim 1, characterized in that, The Young's modulus of the protective layer is less than that of the first substrate.

3. The display panel according to claim 1, characterized in that, The coefficient of thermal expansion of the protective layer is α1, and the coefficient of thermal expansion of the inorganic isolation layer is α2; Where 0≤(α1-α2) / α1≤1.

4. The display panel according to claim 3, characterized in that, The coefficient of thermal expansion α1 of the protective layer satisfies α1 < 200 ppm / ℃.

5. The display panel according to claim 1, characterized in that, The display panel further includes a support layer located on the side of the first substrate away from the inorganic isolation layer in the first direction, and the support layer has a second opening that penetrates the support layer; At least a portion of the second opening is located in the bending area, and in the flat state of the display panel, the second opening covers the first opening along the first direction.

6. The display panel according to claim 5, characterized in that, The first substrate includes a first substrate portion and a second substrate portion disposed opposite to each other, and the first opening is provided between the first substrate portion and the second substrate portion; The support layer includes a first support portion and a second support portion disposed opposite to each other, and a second opening is provided between the first support portion and the second support portion; Along the first direction, the first support portion is located on the side of the first substrate portion away from the inorganic isolation layer, and the second support portion is located on the side of the second substrate portion away from the inorganic isolation layer; the first substrate portion includes a first end face near the first opening, and the first support portion includes a second end face near the second opening; along the second direction, the distance A1 between the first end face and the second end face satisfies 0 ≤ A1 ≤ 0.1 mm; the second direction intersects the first direction; The second substrate portion includes a third end face near the first opening, and the second support portion includes a fourth end face near the second opening. Along the second direction, the distance A2 between the third end face and the fourth end face satisfies 0 ≤ A2 ≤ 0.1 mm.

7. The display panel according to claim 1, characterized in that, The thickness of the protective layer is greater than the thickness of the first substrate.

8. The display panel according to claim 7, characterized in that, The display panel further includes a support layer located on the side of the first substrate away from the inorganic isolation layer in the first direction, and the support layer has a second opening that penetrates the support layer; At least a portion of the second opening is located in the bending area, and in the flat state of the display panel, the second opening covers the first opening along the first direction; At least a portion of the protective layer is located within the second opening.

9. The display panel according to claim 8, characterized in that, The support layer includes a first support portion and a second support portion disposed opposite to each other, and a second opening is provided between the first support portion and the second support portion; The first support portion includes a second end face near the second opening in the second direction and a fifth end face away from the inorganic isolation layer in the first direction; the second support portion includes a fourth end face near the second opening in the second direction and a sixth end face away from the inorganic isolation layer in the first direction; the second direction intersects the first direction. The protective layer covers the second end face, the fourth end face, a portion of the fifth end face, and a portion of the sixth end face.

10. The display panel according to claim 9, characterized in that, Along the second direction, the coverage length B1 of the protective layer on the fifth end face satisfies B1 > 0.05 mm; Along the second direction, the coverage length B2 of the protective layer on the sixth end face satisfies B2 > 0.05 mm.

11. The display panel according to claim 9, characterized in that, The display panel further includes a support structure, which is located on the side of the support layer away from the inorganic isolation layer along the first direction; Along the second direction, the support structure includes a seventh end face near the side of the bending area, and there is a gap between the protective layer and the seventh end face.

12. The display panel according to claim 9, characterized in that, The display panel further includes a support structure, which is located on the side of the support layer away from the inorganic isolation layer along the first direction; Along the second direction, the support structure includes a seventh end face near the side of the bending area, and the protective layer covers the seventh end face.

13. The display panel according to claim 7, characterized in that, The Young's modulus of the protective layer is E1, and the Young's modulus of the first substrate is E2. Among them, 0.02 < E1 / E2 < 0.

25.

14. The display panel according to claim 1, characterized in that, The thickness of the protective layer is less than the thickness of the first substrate.

15. The display panel according to claim 14, characterized in that, The Young's modulus of the protective layer is E1, and the Young's modulus of the first substrate is E2. Where E1 / E2 < 0.00025.

16. The display panel according to claim 1, characterized in that, The bending area includes a first bending area and a second bending area; Along the second direction, the first bending area is located on one side of the display area; Along the third direction, the second bending area is located on one side of the display area; the second direction and the third direction intersect and both intersect the first direction.

17. A method for manufacturing a display panel, characterized in that, include: A display panel is provided, the display panel comprising a first substrate and an inorganic isolation layer; Along the first direction, the inorganic isolation layer is located on one side of the first substrate; The first direction is the thickness direction of the display panel; A first opening is formed in the first substrate, the first opening penetrating the first substrate along the first direction and exposing a portion of the inorganic isolation layer; A protective layer is prepared at least in the first opening, and a portion of the display panel is bent to the non-light-emitting side of the display panel at the location of the first opening.

18. The preparation method according to claim 17, characterized in that, The first opening is formed in the first substrate, including: The first substrate is irradiated with a first laser to reduce the adhesion between the first substrate and the inorganic isolation layer; The first substrate is irradiated with a second laser to form a fracture in the first substrate; the first substrate has a greater absorption rate of the second laser than that of the first laser. The first substrate surrounding the break is removed to form a first opening in the first substrate.

19. The preparation method according to claim 18, characterized in that, The first laser includes an infrared laser, and the second laser includes an ultraviolet laser.

20. The preparation method according to claim 18, characterized in that, Removing the first substrate surrounding the break to form a first opening in the first substrate includes: An adhesive layer is attached to the surface of the first substrate surrounding the fracture, wherein the adhesive force between the adhesive layer and the first substrate is greater than the adhesive force between the first substrate and the inorganic isolation layer; The adhesion layer is used to remove the first substrate surrounding the break to form a first opening in the first substrate.

21. The preparation method according to claim 17, characterized in that, The process includes preparing a protective layer at least in the first opening and bending a portion of the display panel to the non-light-emitting side of the display panel at the location of the first opening, including: A protective layer material is filled into the first opening; the Young's modulus of the protective layer material is less than that of the Young's modulus of the first substrate. Bend a portion of the display panel at the location of the first opening to the non-light-emitting side of the display panel; The protective layer material is cured to prepare a protective layer, at least a portion of which is located within the first opening.

22. The preparation method according to claim 17, characterized in that, The process includes preparing a protective layer at least in the first opening and bending a portion of the display panel to the non-light-emitting side of the display panel at the location of the first opening, including: A protective layer material is filled into the first opening; the Young's modulus of the protective layer material is less than that of the Young's modulus of the first substrate. The protective layer material is cured to prepare a protective layer, the protective layer being located within the first opening and the thickness of the protective layer being less than the thickness of the first substrate; The display panel is bent to the non-light-emitting side of the display panel at the location of the first opening.

23. The preparation method according to claim 17, characterized in that, The display panel further includes a support structure, which is located on the side of the first substrate away from the inorganic isolation layer along the first direction; The process includes preparing a protective layer at least in the first opening and bending a portion of the display panel to the non-light-emitting side of the display panel at the location of the first opening, including: Bend a portion of the display panel at the location of the first opening to the non-light-emitting side of the display panel; A protective layer material is filled between the bent inorganic isolation layer and the supporting structure; The protective layer material is cured to prepare a protective layer that covers the end face of the support structure near the bending area.

24. A display device, characterized in that, Includes the display panel as described in any one of claims 1-16.

Images