Display panel, display device and preparation method of display panel

Abstract

The application discloses a display panel, a display device and a preparation method of the display panel. The display panel comprises a display substrate, a cover plate and a protective layer. The display substrate is provided with a first through hole. The cover plate is located on one side of the display substrate. The protective layer covers at least part of the inner wall surface of the display substrate facing the first through hole. In the embodiment of the application, the protective layer can provide protection for the inner wall surface of the display substrate facing the first through hole, and the sealing caused by the opening on the display substrate is improved. In addition, the protective layer and the cover plate can provide protection for different parts of the display substrate, and can better improve the problem of water and oxygen intrusion of the display substrate, thereby improving the yield of the display substrate.

Description

Technical Field

[0001] This application relates to the field of displays, specifically to a display panel, a display device, and a method for manufacturing the display panel. Background Technology

[0002] Organic light-emitting diodes (OLEDs) are self-emissive display devices. Compared to traditional liquid crystal displays (LCDs), OLED technology does not require a backlight and is self-emissive. OLEDs use a thin layer of organic material and a glass substrate; when current flows through, the organic material emits light. Therefore, OLED display panels can significantly save energy, be made lighter and thinner, withstand a wider range of temperature variations than LCD panels, and have a wider viewing angle. OLED display panels are expected to become the next-generation flat panel display technology after LCDs and are currently one of the most watched technologies in the flat panel display field.

[0003] In existing technologies, in order to achieve under-display integration of photosensitive elements, through holes are opened on the display panel. The photosensitive elements obtain target light through the through holes. However, opening holes will destroy the integrity of the display panel, leading to water and oxygen intrusion and reducing the yield of the display panel. Summary of the Invention

[0004] This application provides a display panel, a display device, and a method for manufacturing the display panel, aiming to improve the yield of the display panel.

[0005] An embodiment of the first aspect of this application provides a display panel, comprising: a display substrate having a through-hole; a cover plate located on one side of the display substrate; and a protective layer covering at least a portion of the inner wall surface of the display substrate facing the first through-hole.

[0006] According to the first aspect of the present application, the device further includes a polarizer located between the display substrate and the cover plate. A second through hole is provided through the polarizer. The orthographic projection of the second through hole on the cover plate is located within the orthographic projection of the first through hole on the cover plate. The diameter of the second through hole is smaller than the diameter of the first through hole. At least a portion of the protective layer overlaps the surface of the polarizer facing the display substrate.

[0007] According to any of the foregoing embodiments of the first aspect of this application, the central axes of the first through hole and the second through hole overlap.

[0008] According to any of the foregoing embodiments of the first aspect of this application, it further includes: an adhesive layer located between the polarizer and the cover plate, the adhesive layer including a through-hole, the orthographic projection of the third through-hole on the cover plate and the orthographic projection of the second through-hole on the cover plate being overlapped.

[0009] According to any of the foregoing embodiments of the first aspect of this application, it further includes: a buffer layer located on the side of the display substrate away from the cover plate, the buffer layer including a fourth through hole communicating with the first through hole.

[0010] According to any of the foregoing embodiments of the first aspect of this application, the orthographic projection of the first through hole on the cover plate and the orthographic projection of the fourth through hole on the cover plate are overlapped.

[0011] According to any of the foregoing embodiments of the first aspect of this application, at least a portion of the protective layer extends from the inner wall surface of the display substrate toward the first through hole to the inner wall surface of the buffer layer toward the fourth through hole.

[0012] According to any of the foregoing embodiments of the first aspect of this application, the orthographic projection of the first through hole on the cover plate is located within the orthographic projection of the fourth through hole on the cover plate, and the diameter of the fourth through hole is larger than the diameter of the first through hole. The protective layer extends from the inner wall surface of the display substrate toward the first through hole to the surface of the display substrate toward the buffer layer.

[0013] According to any of the foregoing embodiments of the first aspect of this application, the edge of the protective layer located on the display substrate facing the surface of the buffer layer is spaced apart from the inner wall surface of the buffer layer facing the fourth through hole, or the edge of the protective layer located on the display substrate facing the surface of the buffer layer abuts against the inner wall surface of the buffer layer facing the fourth through hole.

[0014] According to any of the foregoing embodiments of the first aspect of this application, the thickness of the protective layer is 5 μm to 50 μm.

[0015] According to any of the foregoing embodiments of the first aspect of this application, the material of the protective layer includes UV-curable and non-UV-curable waterproof adhesives.

[0016] An embodiment of the second aspect of this application provides a display device that includes a display panel of any of the above embodiments.

[0017] An embodiment of the third aspect of this application provides a method for manufacturing a display panel, comprising:

[0018] A through-hole is formed on a display substrate to be cut to form a display substrate. The display substrate has a first surface and a second surface opposite to each other. The first through-hole penetrates the first surface and the second surface.

[0019] A protective material layer is filled into the first through-hole of the display substrate;

[0020] A protective material layer is patterned to form a protective layer located on the inner wall of the display substrate facing the first through hole, thus forming a display panel.

[0021] According to an embodiment of the third aspect of this application, the step of filling the first through-hole of the display substrate with protective material further includes:

[0022] A polarizer to be cut is disposed on the side of the second surface of the display substrate;

[0023] The step of patterning the protective material layer to form a protective layer located on the inner wall of the display substrate facing the first through hole further includes: patterning the protective material layer and the polarizer to be polarized to form a protective layer and a polarizer including a second through hole, wherein the aperture of the second through hole is smaller than the aperture of the first through hole, and at least a portion of the protective layer overlaps the surface of the polarizer facing the display substrate.

[0024] According to any of the foregoing embodiments of the third aspect of this application, the step of setting the polarizer to be cut on the side where the second surface of the display substrate is located further includes: setting the adhesive layer to be cut on the side of the polarizer to be cut away from the display substrate.

[0025] The step of patterning the protective material layer to form a protective layer located on the inner wall of the display substrate facing the first through hole further includes: patterning the protective material layer, the polarizer to be cut, and the adhesive layer to be cut to form a protective layer, a polarizer including a second through hole, and an adhesive layer including a third through hole, wherein the aperture of the third through hole is the same as the aperture of the second through hole.

[0026] According to any of the foregoing embodiments of the third aspect of this application, it further includes: providing a buffer layer on the side where the first surface of the display substrate is located, the buffer layer including a fourth through hole communicating with the first through hole, the diameter of the fourth through hole being greater than or equal to the diameter of the first through hole.

[0027] According to any of the foregoing embodiments of the third aspect of this application, in the step of filling a protective material layer in the first through hole of the display substrate, at least a portion of the protective material layer is located on the first surface.

[0028] In the display panel provided in this application embodiment, the display panel includes a display substrate, a cover plate, and a protective layer. The cover plate is located on one side of the display substrate and is used to provide protection to the surface of the display substrate. A first through-hole is provided on the display substrate, allowing the photosensitive element to obtain target light through the first through-hole on the side of the display substrate away from the cover plate, facilitating under-display integration of the photosensitive element. The protective layer covers at least a portion of the inner wall surface of the display substrate facing the first through-hole, providing protection to the inner wall surface of the display substrate facing the first through-hole and improving the sealing problem caused by the opening in the display substrate. In addition, the protective layer and the cover plate can provide protection to different parts of the display substrate, better improving the problem of water and oxygen intrusion into the display substrate, thereby improving the yield of the display substrate. Attached Figure Description

[0029] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0030] Figure 1 This is a top view schematic diagram of a display panel provided in the first aspect embodiment of this application;

[0031] Figure 2 This is one embodiment Figure 1 Sectional view at point BB;

[0032] Figure 3 This is a cross-sectional view of a display substrate for a display panel provided in the first aspect of this application;

[0033] Figure 4 In another embodiment Figure 1 Sectional view at point BB;

[0034] Figure 5 In yet another embodiment Figure 1 Sectional view at point BB;

[0035] Figure 6 In another embodiment Figure 1 Sectional view at point BB;

[0036] Figure 7 In another embodiment Figure 1 Sectional view at point BB;

[0037] Figure 8 This is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of this application;

[0038] Figures 9 to 15 This is a schematic diagram of a method for manufacturing a display panel according to an embodiment of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 100. Display panel;

[0041] 10. Display substrate; 10a. Display substrate to be cut; 11. First through-hole; 12. Substrate; 13. Device layer; 14. Light-emitting layer; 141. Pixel definition layer; 142. Light-emitting unit; 15. Pixel electrode; 16. Common electrode layer; 17. Encapsulation layer;

[0042] 20. Cover plate;

[0043] 30. Protective layer; 30a. Protective material layer;

[0044] 40. Polarizing film; 40a. Polarizing film to be cut; 41. Second through hole;

[0045] 50. Adhesive layer; 50a. Adhesive layer to be cut; 51. Third through hole;

[0046] 60. Buffer layer; 61. Fourth through hole;

[0047] AA, Display area; NA, Non-display area; TA, Hole area. Detailed Implementation

[0048] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0050] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0051] This application provides a display panel, a display device, and a method for manufacturing the display panel. The following description, in conjunction with the accompanying drawings, will illustrate various embodiments of the display panel and the display device.

[0052] This application provides a display panel, which may be an organic light-emitting diode (OLED) display panel.

[0053] Please see Figures 1 to 3 , Figure 1 This is a top view schematic diagram of a display panel 100 provided according to an embodiment of this application. Figure 1 yes Figure 2 Sectional view at point BB.

[0054] like Figure 1 and Figure 2 As shown, an embodiment of the first aspect of this application provides a display panel 100. The display panel 100 includes a display substrate 10, a cover plate 20, and a protective layer 30. The display substrate 10 has a first through hole 11 that passes through it. The cover plate 20 is located on one side of the display substrate 10. The protective layer 30 covers at least a portion of the inner wall surface of the display substrate 10 facing the first through hole 11.

[0055] In the display panel 100 provided in this embodiment, the display panel 100 includes a display substrate 10, a cover plate 20, and a protective layer 30. The cover plate 20 is located on one side of the display substrate 10 and is used to provide protection to the surface of the display substrate 10. A first through-hole 11 is provided on the display substrate 10, so that the photosensitive element can obtain target light through the first through-hole 11 on the side of the display substrate 10 away from the cover plate 20, which facilitates the under-display integration of the photosensitive element. The protective layer 30 covers at least a portion of the inner wall surface of the display substrate 10 facing the first through-hole 11. The protective layer 30 can provide protection to the inner wall surface of the display substrate 10 facing the first through-hole 11, improving the phenomenon of poor sealing caused by the opening on the display substrate 10. In addition, the protective layer 30 and the cover plate 20 can provide protection to different parts of the display substrate 10, which can better improve the problem of water and oxygen intrusion into the display substrate 10, thereby improving the yield of the display substrate 10.

[0056] Optionally, the protective layer 30 is annular and at least covers the inner wall surface of the display substrate 10 facing the first through hole 11, so that the protective layer 30 can provide better protection to the display substrate 10.

[0057] There are several ways to set up the display substrate 10, which are optional, such as... Figure 3As shown, the display substrate 10 includes a substrate 12, a device layer 13, and a light-emitting layer 14. The device layer 13 is located between the substrate 12 and the light-emitting layer 14, and the light-emitting layer 14 is located on the side of the device layer 13 facing the cover plate 20, so that the cover plate 20 can provide better protection for the light-emitting layer 14. The substrate 12 can be a rigid substrate or a flexible substrate. When the substrate 12 is a rigid substrate, it can be made of materials such as glass. When the substrate 12 is a flexible substrate, it can be made of flexible materials such as polyimide.

[0058] Device layer 13 includes driving circuitry. Driving circuitry may include, for example, thin-film transistors (TFTs). TFTs may include a source, drain, gate, and semiconductor portion. Driving circuitry may also include signal lines such as capacitors, data lines, scan lines, power lines, and voltage reference lines.

[0059] The light-emitting layer 14 includes a pixel definition layer 141, which includes a pixel opening and a light-emitting unit 142 located within the pixel opening. The device layer 13 may also include a pixel electrode layer 15 facing the side of the light-emitting layer 14, and the light-emitting layer 14 may also include a common electrode layer 16 facing away from the device layer 13.

[0060] Optionally, the display substrate 10 may further include an encapsulation layer 17 located on the side of the common electrode layer 16 facing away from the device layer 13, providing better protection to the light-emitting unit 142 through the encapsulation layer 17. The encapsulation layer 17 may be a multilayer structure, including a plurality of film layers sequentially stacked along the thickness direction of the display panel 100. For example, the encapsulation layer 17 may include an inorganic layer, an organic layer, and an inorganic layer sequentially stacked along the thickness direction.

[0061] Optionally, the first via 11 is disposed through the substrate 12, the device layer 13, the light-emitting layer 14 and the encapsulation layer 17.

[0062] Optionally, the protective layer 30 covers at least the inner wall surfaces of the light-emitting layer 14 and the device layer 13 facing the first through hole 11, so that the protective layer 30 can protect the metal material in the device layer 13 from water and oxygen intrusion, and protect the light-emitting unit 142 of the light-emitting layer 14 from water and oxygen intrusion.

[0063] Optionally, the protective layer 30 may also cover at least the inner wall surface of the encapsulation layer 17 facing the first through hole 11, so that the protective layer 30 can provide better protection to the light-emitting unit 142 together with the encapsulation layer 17.

[0064] Optionally, the protective layer 30 may at least cover the inner wall surface of the substrate 12, device layer 13, light-emitting layer 14 and encapsulation layer 17 facing the first through hole 11, so that the protective layer 30 can be enclosed together with the substrate 12 and encapsulation layer 17 to form a relatively closed space, which can better improve the water and oxygen intrusion problem of device layer 13 and light-emitting layer 14, and further improve the yield of display panel 100.

[0065] In some alternative embodiments, please continue to refer to Figure 2 The display panel 100 also includes a polarizer 40, which is located between the display substrate 10 and the cover plate 20. A second through hole 41 is provided through the polarizer 40. The orthographic projection of the second through hole 41 on the cover plate 20 is located within the orthographic projection of the first through hole 11 on the cover plate 20. The diameter of the second through hole 41 is smaller than the diameter of the first through hole 11. At least a portion of the protective layer 30 overlaps the surface of the polarizer 40 facing the display substrate 10.

[0066] In these alternative embodiments, the second through-hole 41 is smaller than the first through-hole 11, so at least a portion of the polarizer 40 extends out of one side of the first through-hole 11. At least a portion of the protective layer 30 overlaps the polarizer 40 extending out of the first through-hole 11, that is, at least a portion of the protective layer 30 overlaps the surface of the polarizer 40 facing the display substrate 10, and the polarizer 40 can provide support to the protective layer 30, improving the deformation of the protective layer 30.

[0067] Optional, such as Figure 1 and Figure 2 As shown, the display panel 100 includes an aperture area TA, a non-display area NA surrounding the aperture area TA, and a display area AA surrounding the non-display area NA. The size of the second through hole 41 determines the size of the aperture area TA, and the thickness of the protective layer 30 determines the size of the non-display area NA.

[0068] Optionally, the thickness of the protective layer 30 is 5μm to 50μm. When the thickness of the protective layer 30 is within the above range, it can avoid the protective strength being insufficient due to the thickness of the protective layer 30 being too small, and it can also avoid the display area being too large due to the thickness of the protective layer 30 being too large, thus affecting the display effect of the display panel.

[0069] Optionally, the material of the protective layer 30 may include a UV-curable adhesive, i.e., a UV-curable adhesive, which makes the protective layer 30 very easy to cure and prepare. Alternatively, the material of the protective layer 30 may also include a non-UV-curable waterproof adhesive.

[0070] In this application, the protective layer 30 covers the inner wall surface of the display substrate 10 facing the first through hole 11. The protective layer 30 and the second through hole 41 are offset in their projections onto the cover plate 20, which improves the light transmittance of the second through hole 41. By reasonably setting the size of the second through hole 41, the size of the aperture area TA on the display panel 100, i.e., the size of the photosensitive element on the display panel 100 used to acquire target light, can be reasonably controlled. Furthermore, by reasonably setting the size of the second through hole 41, i.e., by reasonably controlling the size of the polarizer 40 extending to one side of the first through hole 11, the thickness of the protective layer 30 can be reasonably controlled, avoiding the protective layer 30 being too thick, which would cause the size of the non-display area NA to be too large and affect the display effect of the display panel 100.

[0071] In some optional embodiments, the first through hole 11 is arranged to overlap the central axis of the orthographic projection of the cover plate 20 and the second through hole 41. That is, the centers of the orthographic projections of the first through hole 11 and the second through hole 41 on the cover plate 20 overlap. When the protective layer 30 is disposed on the polarizer 40, it can ensure that the thickness of the protective layer 30 at different positions is kept as consistent as possible.

[0072] The difference between the diameter of the first through hole 11 and the diameter of the second through hole 41 can be set according to actual needs. For example, the difference between the diameter of the first through hole 11 and the diameter of the second through hole 41 can be 1μm to 10μm. When the difference between the diameter of the first through hole 11 and the diameter of the second through hole 41 is within the above range, it can avoid the protective layer 30 being too thin due to the difference between the diameter of the first through hole 11 and the diameter of the second through hole 41 being too small, thus failing to provide better protection to the display substrate 10. It can also avoid the difference between the diameter of the first through hole 11 and the diameter of the second through hole 41 being too large, thus causing the size of the non-display area NA to be too large and affecting the display effect of the display panel 100.

[0073] In some alternative embodiments, such as Figure 2 As shown, the display panel 100 also includes an adhesive layer 50, which is located between the polarizer 40 and the cover plate 20. The adhesive layer 50 includes a through-hole 51, and the orthographic projection of the third through-hole 51 on the cover plate 20 and the orthographic projection of the second through-hole 41 on the cover plate 20 are overlapped.

[0074] In these optional embodiments, the polarizer 40 can be bonded to the cover plate 20 via the adhesive layer 50, ensuring the stability of the relative position between the polarizer 40 and the cover plate 20. The adhesive layer 50 includes a through-hole 51, which can improve the light transmittance of the aperture area TA. The third through-hole 51 and the second through-hole 41 are arranged with their orthogonal projections on the cover plate 20 overlapping, which can prevent the third through-hole 51 from being too large, causing a gap between part of the polarizer 40 and the cover plate 20, affecting the stability of the relative position between the polarizer 40 and the cover plate 20. It can also prevent the third through-hole 51 from being too small, causing part of the adhesive layer 50 to protrude to one side of the second through-hole 41, affecting the light transmittance of the aperture area TA.

[0075] There are various ways to set the material of the adhesive layer 50. For example, the material of the adhesive layer 50 may include transparent optical adhesive, which can improve the influence of the adhesive layer 50 on the light emission of the display substrate 10 and ensure the display effect of the display panel 100.

[0076] In some alternative embodiments, such as Figure 2 As shown, the display panel 100 also includes a buffer layer 60, which is located on the side of the display substrate 10 away from the cover plate 20. The buffer layer 60 includes a fourth through hole 61 that communicates with the first through hole 11.

[0077] In these alternative embodiments, by providing a buffer layer 60 on the side of the display substrate 10 away from the cover plate 20, the buffer layer 60 and the cover plate 20 can respectively provide protection to different surfaces of the display substrate 10. A fourth through-hole 61 is provided on the buffer layer 60, and the fourth through-hole 61 communicates with the first through-hole 11, allowing the photosensitive element to obtain target light through the first through-hole 11 and the fourth through-hole 61, thereby improving the light transmittance of the aperture area TA of the display panel 100.

[0078] When the display panel 100 includes a buffer layer 60, there are various relative positional relationships between the fourth through hole 61 on the buffer layer 60 and the first through hole 11 on the display substrate 10.

[0079] Optional, such as Figure 4 As shown, the diameter of the fourth through hole 61 is smaller than that of the first through hole 11. The protective layer 30 abuts against the surface of the buffer layer 60 facing the display substrate 10, so that the protective layer 30 and the buffer layer 60 enclose a relatively closed space, which can provide better protection for the display substrate 10.

[0080] Or, such as Figure 5 As shown, the diameter of the fourth through hole 61 is equal to the diameter of the first through hole 11. The orthographic projection of the fourth through hole 61 on the cover plate 20 and the orthographic projection of the first through hole 11 on the cover plate 20 are overlapped, which can prevent the buffer layer 60 from extending into one side of the first through hole 11 and affecting the light transmittance of the hole area TA of the display panel 100.

[0081] When the orthographic projection of the fourth through hole 61 on the cover plate 20 and the orthographic projection of the first through hole 11 on the cover plate 20 overlap, the protective layer 30 can cover the inner wall surface of the display substrate 10 facing the first through hole 11.

[0082] In other embodiments, such as Figure 5 As shown, at least a portion of the protective layer 30 extends from the inner wall surface of the display substrate 10 toward the first through hole 11 to the inner wall surface of the buffer layer 60 toward the fourth through hole 61. The protective layer 30 extends into the fourth through hole 61, so that the protective layer 30 can better cover the gap between the buffer layer 60 and the display substrate 10, improve the entry of water and oxygen into the display substrate 10 from the gap between the buffer layer 60 and the display substrate 10, and improve the protective effect of the protective layer 30.

[0083] In some other embodiments, please refer to Figure 2 The diameter of the fourth through-hole 61 is larger than that of the first through-hole 11, and the orthographic projection of the first through-hole 11 on the cover plate 20 lies within the orthographic projection of the fourth through-hole 61 on the cover plate 20. Therefore, at least a portion of the display substrate 10 can be exposed through the fourth through-hole 61. The protective layer 30 can extend from the inner wall surface of the display substrate 10 towards the first through-hole 11 to the surface of the display substrate 10 towards the buffer layer 60, ensuring that the protective layer 30 can completely cover the inner wall surface of the display substrate 10 towards the first through-hole 11, thereby improving the protective effect of the protective layer 30.

[0084] Optional, such as Figure 2 As shown, the edge of the protective layer 30 located on the display substrate 10 facing the surface of the buffer layer 60 is spaced apart from the inner wall surface of the buffer layer 60 facing the fourth through hole 61, so as to save material of the protective layer 30.

[0085] Or, such as Figure 6 As shown, the protective layer 30 is located at the edge of the display substrate 10 facing the surface of the buffer layer 60 and abuts against the inner wall surface of the buffer layer 60 facing the fourth through hole 61.

[0086] Or, such as Figure 7 As shown, the protective layer 30 extends from the inner wall surface of the display substrate 10 toward the first through hole 11, through the surface of the display substrate 10 toward the buffer layer 60, to the inner wall surface of the buffer layer 60 toward the fourth through hole 61, so that the protective layer 30 can completely cover the display substrate 10 exposed by the fourth through hole 61, and can provide better protection for the display substrate 10.

[0087] A second aspect of the present invention also provides a display device including the display panel of any of the first aspect embodiments described above. Since the display device provided by the second aspect of the present invention includes the display panel of any of the first aspect embodiments described above, the display device provided by the second aspect of the present invention has the beneficial effects of the display panel of any of the first aspect embodiments described above, which will not be elaborated further here.

[0088] The display devices in the embodiments of the present invention include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0089] Please see Figure 8 , Figure 8 This is a schematic flowchart illustrating a method for manufacturing a display panel 100 according to an embodiment of this application. The display panel 100 can be any of the display panels 100 provided in the first aspect embodiment described above.

[0090] like Figures 1 to 8 As shown, the method for manufacturing the display panel 100 provided in this application embodiment includes:

[0091] Step S01: A through hole 11 is formed on the display substrate 10a to be cut to form a display substrate 10. The display substrate 10 has a first surface and a second surface opposite to each other. The first through hole 11 is formed through the first surface and the second surface.

[0092] Step S02: Fill the first through hole 11 of the display substrate 10 with a protective material layer 30a.

[0093] Step S03: Pattern the protective material layer 30a to form a protective layer 30 located on the inner wall of the display substrate 10 facing the first through hole 11, thereby forming the display panel 100.

[0094] In the preparation method provided in this application embodiment, firstly, in step S01, a first through hole 11 is formed on the display substrate 10a to be cut, and the first through hole 11 penetrates the first surface and the second surface, so that the photosensitive element can obtain target light through the first through hole 11. Then, in step S02, a protective material layer 30a is filled into the first through hole 11, and the protective material layer 30a can provide protection to the inner surface of the display substrate 10 facing the first through hole 11. Next, in step S03, the protective material layer 30a in the first through hole 11 is patterned, so that the protective layer 30 covers the inner wall surface of the display substrate 10 facing the first through hole 11. That is, an opening is made in the protective material layer 30a in the first through hole 11, so that the protective layer 30 is annular and covers the inner wall surface of the display substrate 10 facing the first through hole 11. This not only allows the protective layer 30 to protect the inner wall surface of the display substrate 10 facing the first through hole 11, but also improves the light transmittance.

[0095] Optionally, after step S03, the method further includes: providing a cover plate 20 on one side of the display substrate 10 to form a display panel 100. By providing a cover plate 20 on one side of the display substrate 10, the cover plate 20 can provide protection to the display substrate 10.

[0096] Furthermore, since the cover plate 20 is disposed on one side of the display substrate 10 after step S03, it can also prevent the cover plate 20 from being affected when the display substrate 10 is patterned to form the first through hole 11 in step S01, or when the protective material layer 30a is patterned in step S03.

[0097] Optionally, in step S02, at least a portion of the protective material layer 30a is located on the first surface of the display substrate 10. This portion of the protective material layer 30a is located on the surface of the display substrate 10 facing away from the light-emitting side of the display panel 100, and this portion of the protective material layer 30a is interconnected with the protective material layer 30a within the first through-hole 11. Therefore, when the protective material layer 30a is patterned in step S03, at least a portion of the protective layer 30a can extend from the display substrate 10 towards the inner wall surface of the first through-hole 11 to the first surface of the display substrate 10, thereby improving the protective effect of the protective layer 30a.

[0098] Optionally, when the display panel 100 includes a polarizer 40, before step S02, a polarizer 40a to be cut may be disposed on the side where the first surface of the display substrate 10 is located. Then, during the patterning process of the protective material layer 30a in step S03, the polarizer 40a to be cut may also be patterned simultaneously to form a polarizer 40 including a second through-hole 41. That is, the protective material layer 30a and the polarizer 40a to be cut are patterned to form a protective layer 30 and a polarizer 40 including a second through-hole 41. The diameter of the second through-hole 41 is smaller than the diameter of the first through-hole 11, and at least a portion of the protective layer 30 overlaps the surface of the polarizer 40 facing the display substrate 10.

[0099] In these optional embodiments, on the one hand, the patterning process of the protective material layer 30a and the patterning process of the polarizer 40 can be formed in the same process step, which can simplify the manufacturing steps of the display panel 100 and improve the manufacturing efficiency of the display panel 100. On the other hand, the second through hole 41 is smaller than the first through hole 11, so at least a portion of the polarizer 40 extends out of one side of the first through hole 11, allowing at least a portion of the polarizer 40 to extend out of one side of the first through hole 11. At least a portion of the protective layer 30 overlaps with the polarizer 40 extending out of the first through hole 11, that is, at least a portion of the protective layer 30 overlaps with the surface of the polarizer 40 facing the display substrate 10, and the polarizer 40 can provide support for the protective layer 30, improving the deformation of the protective layer 30.

[0100] Furthermore, before step S02, a polarizer 40a to be cut is provided on one side of the display substrate 10 so that the polarizer 40a to be cut can provide support to the protective material layer 30a. In step S02, when the protective material layer 30a is filled into the first through hole 11, the protective material layer 30a can be located on the polarizer 40a to be cut.

[0101] As described above, when the display panel 100 includes an aperture area TA, a non-display area NA, and a display area AA, the protective layer 30 covers the inner wall surface of the display substrate 10 facing the first through-hole 11, which can improve the light transmittance of the second through-hole 41. By reasonably setting the size of the second through-hole 41, the size of the aperture area TA on the display panel 100, that is, the size of the photosensitive element on the display panel 100 used to acquire target light, can be reasonably controlled. By reasonably setting the size of the second through-hole 41, that is, by reasonably controlling the size of the polarizer 40 extending to one side of the first through-hole 11, the thickness of the protective layer 30 can be reasonably controlled, avoiding the protective layer 30 being too thick, which would cause the size of the non-display area NA to be too large and affect the display effect of the display panel 100.

[0102] Optionally, when the display panel 100 includes an adhesive layer 50, before step S02 or step S03, the adhesive layer 50a to be cut is further disposed on the side of the polarizer 40a facing away from the display substrate 10. Then, step S03 further includes: patterning the adhesive layer 50a to be cut to form an adhesive layer 50 including a third through-hole 51, that is, patterning the protective material layer 30a, the polarizer 40a to be cut, and the adhesive layer 50a to be cut to form a protective layer 30, a polarizer 40 including a second through-hole 41, and an adhesive layer 50 including a third through-hole 51. The diameters of the third through-hole 51 and the second through-hole 41 are the same.

[0103] In this application, the second through-hole 41 and the third through-hole 51 can be formed in the same process step, which can further improve the manufacturing efficiency of the display panel 100. It also ensures that the dimensions of the through-holes, the second through-hole 41, and the third through-hole 51 on the protective material layer 30a are consistent.

[0104] Optionally, the adhesive layer 50 may also include an isolation layer located on the side of the adhesive layer 50 away from the cover plate 20. Before step S04, the isolation layer may be removed so that the polarizer 40 is bonded to the cover plate 20 through the adhesive layer 50.

[0105] In some optional embodiments, the method for manufacturing the display panel 100 further includes: providing a buffer layer 60 on the side where the first surface of the display substrate 10 is located, the buffer layer 60 including a fourth through hole 61 communicating with the first through hole 11. The fourth through hole 61 can improve the light transmittance of the hole region TA. The aperture of the fourth through hole 61 is greater than or equal to the aperture of the first through hole 11.

[0106] In some embodiments, a buffer layer 60 may be provided on one side of the display substrate 10 after step S01 to avoid the buffer layer 60 affecting the opening of the first through hole 11 on the display substrate 10.

[0107] In some embodiments, a buffer layer 60 may be provided on one side of the display substrate 10 before step S02, and the diameter of the fourth through hole 61 is larger than the diameter of the first through hole 11. The fourth through hole 61 can provide a limit to the protective material layer 30a, preventing the protective material layer 30a from covering too much of the surface of the display substrate 10 facing the buffer layer 60. After the protective material layer 30a is patterned, at least a portion of the protective layer 30 covers the surface of the display substrate 10 facing the buffer layer 60, and / or at least a portion of the protective layer 30 covers the inner wall surface of the buffer layer 60 facing the fourth through hole 61.

[0108] In some embodiments, a buffer layer 60 to be prepared can be formed on one side of the display substrate 10a to be cut before step S01. In step S01, the buffer layer 60 and the display substrate 10a to be cut are patterned together to form a first through hole 11 and a fourth through hole 61 with the same aperture. In step S02, the protective material layer 30a can only cover the inner wall surface of the display substrate 10 facing the first through hole 11, so the formed protective layer 30 can only cover the inner wall surface of the display substrate 10 facing the first through hole 11. Alternatively, the protective material layer 30a can cover both the inner wall surface of the display substrate 10 facing the first through hole 11 and the inner wall surface of the buffer layer 60 facing the fourth through hole 61. Then the formed protective layer 30 can simultaneously cover both the inner wall surface of the display substrate 10 facing the first through hole 11 and the inner wall surface of the buffer layer 60 facing the fourth through hole 61.

[0109] The following is based on Figure 2 Taking the display panel 100 as an example, and combining it with Figures 9 to 15 An example is provided to illustrate an implementation method of a method for preparing a display panel 100 according to an embodiment of this application.

[0110] Step 1, as follows Figure 9 As shown, a display substrate 10a to be cut is provided.

[0111] Step two, as Figure 10 As shown, a first through hole 11 is provided on the display substrate 10a to be cut to form the display substrate 10.

[0112] Step 3, as Figure 11 As shown, a polarizer 40a to be cut and an adhesive layer 50a to be cut are disposed on one side of the display substrate 10. Optionally, an isolation layer is disposed on the side of the adhesive layer 50a to be cut away from the polarizer 40.

[0113] Step four, as Figure 12 As shown, a protective material layer 30a is filled in the first through hole 11, and at least a portion of the protective material layer 30a is located on the surface of the display substrate 10 away from the polarizer 40.

[0114] Step 5, as Figure 13 As shown, the protective material layer 30a, the polarizer 40a to be cut, and the adhesive layer 50a to be cut are patterned to form an annular protective layer 30, a polarizer 40 including a second through hole 41, and an adhesive layer 50 including a third through hole 51. The apertures of the second through hole 41 and the third through hole 51 are smaller than the first through hole 11, so the protective layer 30 can overlap the polarizer 40.

[0115] Step six, as Figure 14As shown, a cover plate 20 is provided on the side of the adhesive layer 50 away from the polarizer 40. When an isolation layer is provided on the adhesive layer 50, the isolation layer can be removed first, and then the polarizer 40, display substrate 10 and other layer structures can be bonded to the cover plate 20 through the adhesive layer 50.

[0116] Step seven, as Figure 15 As shown, a buffer layer 60 is provided on the side of the display substrate 10 away from the polarizer 40 to form a display panel 100. The buffer layer 60 includes a fourth through hole 61, the diameter of which is larger than the diameter of the first through hole 11, so that at least a portion of the protective layer 30 can be located within the fourth through hole 61.

[0117] The display panel 100 prepared according to the embodiments of this application has a protective layer 30 covering the inner wall surface of the display substrate 10 facing the first through hole 11 and the portion of the surface of the display substrate 10 facing the buffer layer 60. The protective layer 30 can provide protection to the inner wall surface of the display substrate 10 facing the first through hole 11, improving the sealing problem caused by the opening on the display substrate 10. In addition, the protective layer 30 and the cover plate 20 can provide protection to different parts of the display substrate 10, which can better improve the problem of water and oxygen intrusion into the display substrate 10, thereby improving the yield of the display substrate 10. Furthermore, the simultaneous formation of the annular protective layer 30, the second through hole 41, and the third through hole 51 in step five can effectively improve the manufacturing efficiency of the display panel 100.

[0118] The embodiments described above are not exhaustive, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized by, include: The display substrate has a through-hole; A cover plate is located on one side of the display substrate; A polarizer is located between the display substrate and the cover plate. A second through hole is provided through the polarizer. The orthographic projection of the second through hole on the cover plate is located within the orthographic projection of the first through hole on the cover plate. A protective layer covers at least a portion of the inner wall surface of the display substrate facing the first through hole; At least a portion of the protective layer overlaps the surface of the polarizer facing the display substrate.

2. The display panel of claim 1, wherein, It also includes the fact that the diameter of the second through hole is smaller than the diameter of the first through hole.

3. The display panel according to claim 2, characterized in that, The central axes of the first through hole and the second through hole overlap.

4. The display panel according to claim 1, characterized in that, Also includes: An adhesive layer is located between the polarizer and the cover plate. The adhesive layer includes a through-hole, and the orthographic projection of the third through-hole on the cover plate and the orthographic projection of the second through-hole on the cover plate overlap.

5. The display panel according to claim 1, characterized in that, Also includes: A buffer layer is located on the side of the display substrate away from the cover plate, and the buffer layer includes a fourth through hole communicating with the first through hole.

6. The display panel according to claim 5, characterized in that, The orthographic projections of the first through hole and the fourth through hole on the cover plate overlap.

7. The display panel according to claim 6, characterized in that, At least a portion of the protective layer extends from the inner wall surface of the display substrate toward the first through hole to the inner wall surface of the buffer layer toward the fourth through hole.

8. The display panel according to claim 5, characterized in that, The orthographic projection of the first through hole on the cover plate is located within the orthographic projection of the fourth through hole on the cover plate, and the diameter of the fourth through hole is larger than the diameter of the first through hole. The protective layer extends from the inner wall surface of the display substrate toward the first through hole to the surface of the display substrate toward the buffer layer.

9. The display panel according to claim 8, characterized in that, The protective layer is provided with an edge on the display substrate facing the surface of the buffer layer and an inner wall surface of the buffer layer facing the fourth through hole, or the edge of the protective layer on the display substrate facing the surface of the buffer layer and an inner wall surface of the buffer layer facing the fourth through hole abut against each other.

10. The display panel according to claim 1, characterized in that, The thickness of the protective layer is 5μm~50μm; And / or, the material of the protective layer includes UV-curable and non-UV-curable waterproof adhesives.

11. A display device, characterized in that, Includes the display panel as described in any one of claims 1-10.

12. A method for manufacturing a display panel, characterized in that, include: A through-hole is formed on a display substrate to be cut to form a display substrate. The display substrate has a first surface and a second surface opposite to each other. The first through-hole penetrates the first surface and the second surface. A polarizer to be cut is disposed on the side of the second surface of the display substrate; A protective material layer is filled into the first through-hole of the display substrate; The protective material layer and the polarizer to be cut are patterned to form a protective layer and a polarizer including a second through hole, wherein the diameter of the second through hole is smaller than the diameter of the first through hole, and at least part of the protective layer overlaps the surface of the polarizer facing the display substrate to form the display panel.

13. The method for manufacturing a display panel according to claim 12, characterized in that, The step of setting the polarizer to be cut on the side where the second surface of the display substrate is located further includes: setting the adhesive layer to be cut on the side of the polarizer to be cut away from the display substrate; The step of patterning the protective material layer to form a protective layer located on the inner wall of the display substrate facing the first through hole further includes: patterning the protective material layer, the polarizer to be cut, and the adhesive layer to be cut to form the protective layer, the polarizer including the second through hole, and the adhesive layer including the third through hole, wherein the aperture of the third through hole is the same as the aperture of the second through hole.

14. The method for manufacturing a display panel according to claim 12, characterized in that, Also includes: A buffer layer is provided on the side where the first surface of the display substrate is located. The buffer layer includes a fourth through hole communicating with the first through hole. The diameter of the fourth through hole is greater than or equal to the diameter of the first through hole.

15. The method for manufacturing a display panel according to claim 12, characterized in that, In the step of filling the first through-hole of the display substrate with a protective material layer, at least a portion of the protective material layer is located on the first surface.

Images