Display panel, manufacturing method thereof, and mobile terminal

Abstract

An embodiment of the present application discloses a display panel, a manufacturing method thereof, and a mobile terminal. The display panel includes a substrate and a pixel definition layer; a plurality of pixel openings are provided on the pixel definition layer, stress reduction grooves are provided on the pixel definition layer on the periphery of the pixel openings, a stress reduction layer is provided in the stress reduction grooves, and the material of the stress reduction layer is a composite material formed by an organic material and an inorganic auxiliary material, and the elastic modulus of the composite material is greater than or equal to 500 MPa; the technical solution of the present application effectively extends the overall life of the screen and improves the use effect of the display panel by providing stress reduction grooves on the pixel definition layer on the periphery of the pixel openings and providing a stress reduction layer in the stress reduction grooves to absorb or disperse bending or curling stress.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a display panel, a manufacturing method thereof, and a mobile terminal. Background Art

[0002] Due to its bendable performance, the OLED flexible screen is increasingly favored by the market and has strong market prospects. During the bending or curling process of the flexible screen, the bending points and curling parts of the flexible screen will bear large bending or curling stresses during the bending and curling processes. The flexible screen is in a state of uneven stress for a long time, and this state will affect the overall lifespan and usage effect of the screen.

[0003] To solve this technical problem, there is an urgent need for a display panel that can reduce the bending or curling stress during the bending and curling of the screen. Summary of the Invention

[0004] Embodiments of this application provide a display panel, a manufacturing method thereof, and a mobile terminal, which can effectively reduce the bending or curling stress during the bending and curling of the screen, effectively extend the overall lifespan of the screen, and improve the usage effect of the display panel at the same time.

[0005] Embodiments of this application provide a display panel, including:

[0006] A substrate;

[0007] A pixel definition layer disposed on the substrate, with a plurality of pixel openings formed thereon, and an organic light-emitting layer disposed in the pixel openings;

[0008] Wherein, a stress-reducing groove is disposed on the pixel definition layer on the periphery of the pixel opening, a stress-reducing layer is disposed in the stress-reducing groove, the material of the stress-reducing layer is a composite material formed by an organic material and an inorganic auxiliary material, and the elastic modulus of the composite material is greater than or equal to 500 MPa.

[0009] Optionally, the organic material includes one or more of acrylate, epoxy resin, polyurethane, and butenyl resin.

[0010] Optionally, the inorganic auxiliary material includes one or more of calcium salts and their oxides.

[0011] Optionally, in the composite material, the mass content of the inorganic auxiliary material is 0.02% - 10%.

[0012] Optionally, in the direction perpendicular to the substrate, the depth of the stress-reducing groove is less than the thickness of the pixel definition layer.

[0013] Optionally, the display panel is bent along a bending center line, and the display panel includes a plurality of display segments arranged in a first direction, and the first direction forms a preset angle with the bending center line;

[0014] Among any two of the display segments, the opening area of the stress-reducing groove on the pixel definition layer corresponding to the display segment closer to the bending center line is larger than the opening area of the stress-reducing groove on the pixel definition layer corresponding to the display segment farther from the bending center line.

[0015] Optionally, the stress-reducing groove includes a plurality of sub-grooves arranged at intervals, and the connection line between two adjacent sub-grooves forms a preset angle with the bending center line.

[0016] Optionally, the composite material is a hydrophobic material.

[0017] This application also provides a method for manufacturing a display panel, including the following steps:

[0018] Provide a substrate;

[0019] Form a pixel definition layer on the substrate, form a pixel opening on the pixel definition layer, and form the stress-reducing groove on the pixel definition layer on the periphery of the pixel opening;

[0020] Form an organic light-emitting layer in the pixel opening, form a stress-reducing groove on the pixel definition layer on the periphery of the pixel opening, and form a stress-reducing layer in the stress-reducing groove. Among them, the material of the stress-reducing layer is a composite material formed by an organic material and an inorganic auxiliary material, and the elastic modulus of the composite material is greater than or equal to 500 MPa.

[0021] This application also provides a mobile terminal, including the display panel described in any one of the above and a terminal body, and the terminal body and the display panel are combined into one.

[0022] The beneficial effects of the present invention at least include:

[0023] By providing a stress-reducing groove on the pixel definition layer on the periphery of the pixel opening, and providing a stress-reducing layer in the stress-reducing groove, the material of the stress-reducing layer is a composite material formed by an organic material and an inorganic auxiliary material, and the elastic modulus of the composite material is greater than or equal to 500 MPa. When the display panel is bent, by providing a stress-reducing groove on the pixel definition layer, a height step is formed at the position of the stress-reducing groove on the pixel definition layer, and the step at the stress-reducing groove is a stress absorption point. At this time, the stress-reducing layer in the stress-reducing groove can absorb the internal stress generated by the bending or curling of the display panel, thereby improving the bending resistance of the display panel, effectively extending the service life of the display panel, and improving the use effect of the display panel. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0025] Figure 1 is a schematic structural diagram of a display panel provided by an embodiment of the present application;

[0026] Figure 2 is a top view of the structure of a display panel provided by an embodiment of the present application;

[0027] Figure 3 is a top view of the structure of another display panel provided by an embodiment of the present application;

[0028] Figure 4 is a top view of the structure of another display panel provided by an embodiment of the present application;

[0029] Figure 5 is a top view of the structure of another display panel provided by an embodiment of the present application;

[0030] Figure 6 is a top view of the structure of another display panel provided by an embodiment of the present application;

[0031] Figure 7 is a top view of the structure of another display panel provided by an embodiment of the present application;

[0032] Figure 8 is a top view of the structure of another display panel provided by an embodiment of the present application;

[0033] Figure 9 is a top view of the structure of another display panel provided by an embodiment of the present application;

[0034] Figure 10 is a manufacturing flow chart of a display panel provided by an embodiment of the present application. Detailed implementation manners

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0036] Embodiments of the present application provide a display panel, a manufacturing method of the display panel, and a mobile terminal. The following will be described in detail respectively. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments. In addition, in the description of the present application, the term "including" means "including but not limited to". The terms first, second, third, etc. are only used as labels and do not impose numerical requirements or establish an order. Various embodiments of the present invention may exist in the form of a range; it should be understood that the description in the form of a range is only for convenience and simplicity and should not be construed as a rigid limitation on the scope of the present invention; therefore, it should be considered that the described range description has specifically disclosed all possible sub-ranges and individual values within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and individual numbers within the counted range, such as 1, 2, 3, 4, 5, and 6, which applies regardless of the range. In addition, whenever a numerical range is indicated herein, it means including any cited number (fraction or integer) within the indicated range.

[0037] Embodiments of the present application provide a display panel, as Figures 1-9 shown, including:

[0038] a substrate 10;

[0039] a pixel definition layer 20 disposed on the substrate 10, a plurality of pixel openings 203 are provided on the pixel definition layer 20, and an organic light-emitting layer 30 is provided in the pixel openings 203;

[0040] Wherein, a stress-reducing groove 201 is provided on the pixel definition layer 20 on the periphery of the pixel opening 203, a stress-reducing layer 202 is provided in the stress-reducing groove 201, the material of the stress-reducing layer 202 is a composite material formed by an organic material and an inorganic auxiliary material, and the elastic modulus of the composite material is greater than or equal to 500 MPa.

[0041] Specifically, the substrate 10 may include an array substrate 10 of the display panel. The substrate 10 specifically includes a stacked substrate layer and a controller device layer disposed on the substrate layer. The controller device layer includes a plurality of controller devices. A plurality of anodes are formed on the controller device layer. One anode corresponds to one pixel opening 203. The organic light-emitting material filled in the pixel opening 203 is connected to the anode, and one controller device controls at least one organic light-emitting layer 30 in the pixel opening 203 to emit light and display.

[0042] Specifically, the controller device may be a thin-film transistor.

[0043] In a specific example, the display panel may be an OLED display panel, which can be specifically adjusted according to the actual production situation.

[0044] Specifically, the material of the pixel definition layer 20 is an organic photoresist material. A pixel opening 203 is formed at a position corresponding to the anode on the pixel definition layer 20, and an organic light-emitting layer 30 is disposed in the pixel opening 203. The material of the organic light-emitting layer 30 is an organic light-emitting material.

[0045] Specifically, a stress-reducing groove 201 is provided on the pixel definition layer 20 on the periphery of the pixel opening 203. The stress-reducing groove 201 may be a continuous long strip groove (as Figure 2 shown), or a combined structure of a plurality of discontinuous sub-grooves 202a (as Figure 3 , Figure 4 , Figure 8 shown), or a blind hole, that is, any structure formed on the pixel definition layer 20 for accommodating the stress-reducing layer 202 is within the protection scope of this application.

[0046] Specifically, in the direction perpendicular to the substrate 10, the stress-reducing groove 201 may be disposed to surround the pixel opening 203. The stress-reducing groove 201 is an annular groove (as Figure 2 shown), or the stress-reducing groove 201 is a crisscross mesh structure (as Figure 5 shown).

[0047] Specifically, in the direction perpendicular to the substrate 10, the stress-reducing groove 201 may be disposed to semi-surround the pixel opening 203 (as Figure 6 shown), and the stress-reducing groove 201 has an extending direction. Further, the extending direction of the stress-reducing groove 201 and the bending direction of the display panel have a preset included angle, and the best value of this angle is 90°.

[0048] Specifically, in the direction perpendicular to the substrate 10, the projection of the stress-reducing groove 201 may be a curve or a broken line. By setting an included angle between the length extending direction of the stress-reducing groove 201 and the bending direction of the display panel, the stress-reducing layer 202 filled in the stress-reducing groove 201 can disperse the stress of bending or curling from multiple directions, extend the service life of the display panel, and improve the display effect of the display panel at the same time.

[0049] Specifically, the number of stress-reducing grooves 201 on the pixel definition layer 20 between two adjacent pixel openings 203 is not limited. It may be one stress-reducing groove 201 or two stress-reducing grooves 201, and can be adjusted according to the actual production situation without affecting the aperture ratio of the display panel.

[0050] Specifically, the cross-section of the stress-reducing groove 201 can be rectangular or inverted trapezoidal. The specific shape can be selected according to the actual production situation and is not limited herein. Preferably, it is an inverted trapezoidal structure.

[0051] Specifically, in the direction perpendicular to the substrate 10, the thickness of the pixel definition layer 20 where the stress-reducing groove 201 is provided is 0.5 um - 2 um, preferably 1 um - 1.2 um. The thickness of the bottom of the stress-reducing groove 201 on the pixel definition layer 20 is 0.1 um - 0.5 um, and the thickness of the stress-reducing layer 202 is 0.1 um - 0.5 um.

[0052] Specifically, the material of the stress-reducing layer 202 is a composite material formed by an organic material and an inorganic auxiliary material. The material of the stress-reducing layer 202 is mainly an organic material, with the inorganic auxiliary material as an auxiliary. The inorganic auxiliary material mainly plays a drying role. The organic material layer has a higher elastic modulus than the inorganic material and can absorb bending or curling stress at the step. The organic material can be one or more of acrylate, epoxy resin, polyurethane, and butenyl resin. The inorganic auxiliary material can be calcium oxide or other calcium salts with water absorption properties.

[0053] It can be understood that by providing the stress-reducing groove 201 on the pixel definition layer 20 on the periphery of the pixel opening 203, and providing the stress-reducing layer 202 in the stress-reducing groove 201, the material of the stress-reducing layer 202 is a composite material formed by an organic material and an inorganic auxiliary material, and the elastic modulus of the composite material is greater than or equal to 500 MPa. When the display panel is bent, due to the provision of the stress-reducing groove 201 on the pixel definition layer 20, a height step is formed at the position of the stress-reducing groove 201 on the pixel definition layer 20. The stress-reducing groove 201 forms a stress absorption point at the step. At this time, the stress-reducing layer 202 in the stress-reducing groove 201 can absorb the internal stress generated by bending or curling, thereby effectively extending the service life of the display panel and improving the use effect of the display panel.

[0054] In one embodiment, the organic material includes one or more of acrylate, epoxy resin, polyurethane, and butenyl resin.

[0055] Specifically, the organic material, water, and inorganic auxiliary material are mixed and coated in the stress-reducing groove 201, and then a gel is formed by UV irradiation or thermal curing.

[0056] It can be understood that by using a resin-based organic material as the main material to form the stress-reducing layer 202, the production cost is low and the stress-reducing effect is good.

[0057] In one embodiment, the inorganic auxiliary material includes one or more of calcium salts and their oxides.

[0058] Specifically, the inorganic auxiliary material may be calcium oxide, and the inorganic auxiliary material mainly functions as a drying agent.

[0059] Specifically, the inorganic auxiliary material includes anhydrous magnesium sulfate, anhydrous calcium chloride, calcium oxide, anhydrous sodium sulfate, activated alumina, anhydrous calcium sulfate, etc.

[0060] It can be understood that by setting the inorganic auxiliary material as one or more of calcium salts and their oxides, it is possible to absorb some water molecules and prevent excessive introduction of water molecules due to the production of the stress reduction layer 202, which may affect the lifespan of the organic light-emitting layer 30.

[0061] In one embodiment, in the composite material, the mass content of the inorganic auxiliary material is 0.02% - 10%.

[0062] Specifically, in the composite material, the mass content of the inorganic auxiliary material can be any one of 0.02%, 0.05%, 0.10%, 0.18%, 0.2%, 0.4%, 3%, 6%, 8%, 10%, and can be specifically adjusted according to the actual production situation.

[0063] It can be understood that by restricting the mass content of the inorganic auxiliary material, it is possible to ensure that the stress reduction layer 202 has good bending stress absorption ability, that is, has an appropriate elastic modulus, and at the same time ensure that the lifespan of the display panel is not affected after the stress reduction layer 202 is set.

[0064] In one embodiment, in the direction perpendicular to the substrate 10, the depth of the stress reduction groove 201 is less than the thickness of the pixel definition layer 20.

[0065] Specifically, in the direction perpendicular to the substrate 10, the thickness of the pixel definition layer 20 where the stress reduction groove 201 is provided is 0.5um - 2um, preferably 1um - 1.2um, the thickness of the bottom of the stress reduction groove 201 on the pixel definition layer 20 is 0.1um - 0.5um, and the thickness of the stress reduction layer 202 is 0.1um - 0.5um.

[0066] It can be understood that by setting the depth of the stress reduction groove 201 to be less than the thickness of the pixel definition layer 20, a step difference exists on the pixel definition layer 20. When the display panel is bent or curled, the bending or curling stress will concentrate at the position where the step difference is formed. The stress reduction layer 202 material is filled in the stress reduction groove 201 and made into a gel state, so that the stress reduction layer 202 can utilize its elastic modulus to effectively disperse the stress generated by the bending or curling of the display panel.

[0067] In one embodiment, as Figure 9 shown, the display panel is bent along a bending center line CL. The display panel includes a plurality of display segments G1 arranged in a first direction F1. The first direction F1 forms a preset angle with the bending center line CL;

[0068] Among them, in any two of the display segments G1, the opening area of the stress reduction groove 201 on the pixel definition layer 20 corresponding to the display segment G1 closer to the bending center line CL is larger than the opening area of the stress reduction groove 201 on the pixel definition layer 20 corresponding to the display segment G1 farther from the bending center line CL.

[0069] Specifically, the first direction F1 forms a preset angle with the bending center line CL, and the preset angle can be 90°.

[0070] Specifically, on one of the display segments G1, when there are multiple sub-grooves 202a in the stress reduction groove 201, their distribution modes can be evenly spaced or spaced. The spacing between adjacent two sub-grooves 202a is not limited, and the sizes of different sub-grooves 202a can be different or the same, and can be specifically adjusted according to the actual production situation.

[0071] Specifically, the opening area of the stress groove refers to the total opening area of the stress reduction groove 201 on the display segment G1.

[0072] Specifically, when the number of sub-grooves 202a in the stress reduction groove 201 on each display segment G1 is equal, the closer to the bending center line CL, the larger the opening area of the sub-grooves 202a on the display segment G1.

[0073] It can be understood that by setting that in any two of the display segments G1, the opening area of the stress reduction groove 201 on the pixel definition layer 20 corresponding to the display segment G1 closer to the bending center line CL is larger than the opening area of the stress reduction groove 201 on the pixel definition layer 20 corresponding to the display segment G1 farther from the bending center line CL, the closer to the bending center line CL, the better the stress reduction effect of the stress reduction layer 202 in the stress reduction groove 201, and the bending performance of the display panel can be improved targeted.

[0074] In one embodiment, the stress reduction groove 201 includes a plurality of sub-grooves 202a arranged at intervals, and the connection line between adjacent two sub-grooves 202a forms a preset angle with the bending center line CL.

[0075] Specifically, as Figure 8 shown, the overall trend of the stress reduction groove 201 on the pixel definition is wavy.

[0076] Specifically, the included angle can be any one of 30°, 35°, 40°, 45°, 50°, 60°, 80°, 85°, and can be specifically selected according to the actual production situation.

[0077] It can be understood that by setting the stress-reducing groove 201 to include a plurality of sub-grooves 202a arranged at intervals, and the connection line between two adjacent sub-grooves 202a forms a preset included angle with the bending center line CL, the stress-reducing groove 201 can disperse the bending stress generated by the bending of the display panel from different directions, further improving the bending resistance performance of the display panel, extending the service life of the display panel, and improving the display effect of the display panel.

[0078] In one embodiment, the composite material is a hydrophobic material.

[0079] Specifically, the hydrophobic property of the composite material can be processed by a gel treatment method, and the gel treatment method includes ion doping, ultraviolet light irradiation, heating, etc., to improve the contact angle.

[0080] This application also provides a method for manufacturing a display panel, as Figure 10 shown, including the following steps:

[0081] S1. Provide a substrate 10;

[0082] S2. Form a pixel definition layer 20 on the substrate 10, form a pixel opening 203 on the pixel definition layer 20, and form the stress-reducing groove 201 on the pixel definition layer 20 on the peripheral side of the pixel opening 203;

[0083] S3. Form an organic light-emitting layer 30 in the pixel opening 203, form a stress-reducing groove 201 on the pixel definition layer 20 on the peripheral side of the pixel opening 203, and form a stress-reducing layer 202 in the stress-reducing groove 201. Among them, the material of the stress-reducing layer 202 is a composite material formed by an organic material and an inorganic auxiliary material, and the elastic modulus of the composite material is greater than or equal to 500 MPa.

[0084] Specifically, the materials and structures of the substrate 10 and the pixel definition layer 20 are the same as the limitations of the materials and structures in the above embodiments, and the size of the pixel opening 203, the structure and materials of the organic light-emitting layer 30 in the pixel opening 203 are the same as the limitations in the above embodiments, and will not be elaborated here.

[0085] Specifically, the formation method of the stress-reducing layer 202 in the stress-reducing groove 201 can be any one of coating or printing.

[0086] Specifically, the pixel opening 203 and the stress reduction groove 201 can be etched using a mask. The pixel opening 203 is fabricated using a fully transparent mask, and the stress reduction groove 201 is fabricated using a semi-transparent mask.

[0087] In a specific example, the manufacturing method of the display panel includes:

[0088] Prepare a control device layer on the substrate layer, form an anode on the control device layer, and coat the entire surface with a pixel definition layer 20. The material of the pixel definition layer 20 can be an organic photoresist. The pixel opening 203 and the stress reduction groove 201 are prepared through exposure and development.

[0089] Coat a composite material in the stress reduction groove 201 to form a stress reduction layer 202. The composite material is subjected to a hydrophobization treatment, specifically, it can be UV irradiation, and then thermally cured to form the stress reduction layer 202.

[0090] By means of inkjet printing, spray an organic light-emitting material into the pixel opening 203, and then dry to form an organic light-emitting layer 30.

[0091] In another specific example, the manufacturing method of the display panel includes:

[0092] Prepare a control device layer on the substrate layer, form an anode on the control device layer, and coat the entire surface with a pixel definition layer 20. The material of the pixel definition layer 20 can be an organic photoresist. The pixel opening 203 and the stress reduction groove 201 are prepared through exposure and development.

[0093] By means of inkjet printing, spray an organic light-emitting material into the pixel opening 203, and then dry to form an organic light-emitting layer 30.

[0094] Coat a composite material in the stress reduction groove 201 to form a stress reduction layer 202. The composite material is subjected to a hydrophobization treatment, specifically, it can be UV irradiation, and then thermally cured to form the stress reduction layer 202.

[0095] Specifically, when forming the stress reduction layer 202, the specific curing method of the composite material mixture needs to be selected according to the specific type of composite material. For example, some materials are thermosetting, some materials are UV curable, and some materials are a mixture of thermosetting and UV curable.

[0096] This application also provides a mobile terminal, including the display panel described in any one of the above and a terminal body, and the terminal body and the display panel are combined into one.

[0097] Specifically, the mobile terminal includes, but is not limited to, the following types: rollable or foldable mobile phones, watches, bracelets, TVs, or other wearable display or touch electronic devices, as well as flexible smartphones, tablets, laptops, desktop monitors, TVs, smart glasses, smart watches, ATMs, digital cameras, in-vehicle displays, medical displays, industrial control displays, e-books, electrophoretic display devices, game consoles, transparent displays, double-sided displays, autostereoscopic displays, mirror display devices, transflective displays, etc.

[0098] In summary, by providing a stress-reducing groove 201 on the pixel definition layer 20 on the peripheral side of the pixel opening 203, a stress-reducing layer 202 is provided in the stress-reducing groove 201, the material of the stress-reducing layer 202 is a composite material formed by an organic material and an inorganic auxiliary material, and the elastic modulus of the composite material is greater than or equal to 500 MPa. When the display panel is bent, due to the provision of the stress-reducing groove 201 on the pixel definition layer 20, a height step is formed at the position of the stress-reducing groove 201 on the pixel definition layer 20, and the stress-reducing groove 201 forms a stress absorption point at the step. At this time, the stress-reducing layer 202 in the stress-reducing groove 201 can absorb the internal stress generated by bending or curling, thereby effectively extending the service life of the display panel and improving the use effect of the display panel.

[0099] The above has introduced in detail a display panel, a manufacturing method of the display panel, and a mobile terminal provided by the embodiments of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A display panel, characterized in that, Comprising: Substrate; Pixel definition layer, disposed on the substrate, having a plurality of pixel openings formed thereon, and an organic light-emitting layer disposed within the pixel openings; Wherein, a stress-reducing groove is formed on the pixel definition layer on the periphery of the pixel opening, a stress-reducing layer is disposed within the stress-reducing groove, the material of the stress-reducing layer is a composite material formed by an organic material and an inorganic auxiliary material, and the elastic modulus of the composite material is greater than or equal to 500 Mpa; Wherein, the display panel is bent along a bending center line, the stress-reducing groove includes a plurality of sub-grooves arranged at intervals, and the connecting line between two adjacent sub-grooves forms a preset angle with the bending center line, so that the stress-reducing groove disperses the bending stress generated by the bending of the display panel from different directions.

2. The display panel according to claim 1, wherein The organic material includes one or more of acrylate, epoxy resin, polyurethane, and butenyl resin.

3. The display panel according to claim 1, wherein The inorganic auxiliary material includes one or more of calcium salts and their oxides.

4. The display panel according to claim 3, wherein In the composite material, the mass content of the inorganic auxiliary material is 0.02% - 10%.

5. The display panel according to claim 1, wherein In the direction perpendicular to the substrate, the depth of the stress-reducing groove is less than the thickness of the pixel definition layer.

6. The display panel according to claim 1, wherein The display panel includes a plurality of display segments arranged in a first direction, and the first direction forms a preset angle with the bending center line; Wherein, in any two of the display segments, the opening area of the stress-reducing groove on the pixel definition layer corresponding to the display segment closer to the bending center line is greater than the opening area of the stress-reducing groove on the pixel definition layer corresponding to the display segment farther from the bending center line.

7. The display panel according to claim 1, wherein The composite material is a hydrophobic material.

8. A method for manufacturing a display panel, characterized in that Comprising: Providing a substrate; Forming a pixel definition layer on the substrate, forming pixel openings on the pixel definition layer, and forming stress-reducing grooves on the pixel definition layer on the periphery of the pixel openings; Forming an organic light-emitting layer within the pixel openings, forming stress-reducing grooves on the pixel definition layer on the periphery of the pixel openings, and forming stress-reducing layers within the stress-reducing grooves, wherein the material of the stress-reducing layer is a composite material formed by an organic material and an inorganic auxiliary material, and the elastic modulus of the composite material is greater than or equal to 500 MPa; Wherein, the display panel is bent along a bending center line, the stress-reducing groove includes a plurality of sub-grooves arranged at intervals, and the connecting line between two adjacent sub-grooves forms a preset angle with the bending center line, so that the stress-reducing groove disperses the bending stress generated by the bending of the display panel from different directions.

9. A mobile terminal, characterized in that, Comprising the display panel according to any one of claims 1 - 7 and a terminal body, and the terminal body and the display panel are combined into one body.

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