Display panel, manufacturing method thereof and display device

Abstract

The invention relates to a display panel, a manufacturing method thereof and a display device. The display panel is provided with a display area and an under-screen camera shooting area. The display panel further comprises a substrate, at least two anode layers, a light-emitting layer and a cathode layer. The at least two anode layers are arranged in the display area, and the at least two anode layers are sequentially stacked on one side of the substrate; the light-emitting layer is arranged on the side, away from the substrate, of the anode layer. The cathode layer is arranged on the side, away from the substrate, of the light-emitting layer. The orthographic projection of the cathode layer and the orthographic projection of the at least two anode layers on the substrate coincide. The anode layer close to the substrate protects the anode layer far away from the substrate, so that the laser intensity capable of being borne by the anode layer is improved, the anode layer far away from the substrate is complete in structure and performance, the current efficiency of the display panel is improved, meanwhile, the light transmittance of an under-screen camera shooting area is improved, the imaging effect of under-screen camera shooting is improved, and the display quality is improved. The design of the two anode layers does not affect the structural layout of the display panel, and the wiring difficulty of the display panel is reduced.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) is an active light-emitting device with the advantages of high contrast, wide viewing angle, low power consumption and thinner thickness.

[0003] Currently, smart devices are developing towards full-screen. In order to increase the screen-to-body ratio, the front camera is usually placed under the screen. In this case, it is necessary to remove the film layer of the under display camera (UDC) to increase the transmittance of the under display camera area and improve the imaging quality of the under display camera.

[0004] However, the process of removing the film layer in the camera area under the screen is complicated and easily damages the film layer in the non-camera area under the screen. Summary of the invention

[0005] Based on this, it is necessary to provide a display panel and a manufacturing method thereof, and a display device to address the above technical problems.

[0006] In a first aspect, the present application provides a display panel, the display panel comprising:

[0007] substrate;

[0008] At least two anode layers are provided in the display area, and at least two anode layers are sequentially stacked on one side of the substrate;

[0009] A light-emitting layer is disposed on a side of the anode layer away from the substrate;

[0010] The cathode layer is arranged on the side of the light-emitting layer away from the substrate, and the cathode layer overlaps with the orthographic projections of at least two anode layers on the substrate.

[0011] The above-mentioned display panel, by arranging at least two stacked anode layers on the substrate, on the one hand, protects the anode layer arranged far away from the substrate with the anode layer arranged close to the substrate, thereby improving the laser intensity that the anode layer can withstand, so that the structure and performance of the anode layer arranged far away from the substrate are intact, and the process of patterned removal of the film layer in the camera area under the screen to form the cathode layer is avoided to damage the anode layer arranged far away from the substrate, thereby improving the current efficiency of the display panel, on the other hand, at the same time, the transmittance of the camera area under the screen is improved, which is beneficial to improving the imaging effect of the camera under the screen, and on the other hand, the design of the two anode layers does not affect the structural layout of the display panel, thereby reducing the wiring difficulty of the display panel.

[0012] In one embodiment, the at least two anode layers include a first anode layer and a second anode layer sequentially stacked on the substrate in a direction away from the substrate;

[0013] Optionally, the first anode layer includes a laser blocking layer.

[0014] In this way, the laser blocking layer of the first anode layer blocks the laser during the process of patterning the cathode layer, which can ensure the patterning accuracy of the cathode layer and etch away the film layer not blocked by the first anode layer. At the same time, the first anode layer protects the second anode layer, ensuring the integrity of the structure and performance of the second anode layer, thereby improving the current efficiency of the display panel.

[0015] In one embodiment, the first anode layer includes a first conductive layer and a second conductive layer sequentially stacked on the substrate in a direction away from the substrate, and at least one of the first conductive layer and the second conductive layer is an opaque metal layer;

[0016] The first conductive layer and / or the second conductive layer serves as the laser blocking layer.

[0017] In this way, the first conductive layer and / or the second conductive layer has a good ability to block lasers, the first anode layer can withstand a large laser intensity, the efficiency of forming the cathode layer using the first anode layer as a mask is higher, the pattern precision of the formed cathode layer is high, and at the same time the effect of the first anode layer protecting the second anode layer can be enhanced.

[0018] In one embodiment, the second anode layer includes a third conductive layer, a fourth conductive layer and a fifth conductive layer sequentially stacked on the first anode layer in a direction away from the substrate;

[0019] Optionally, the third conductive layer and the fifth conductive layer are light-transmitting layers, and the fourth conductive layer is an opaque metal layer.

[0020] In this way, the second anode layer is ensured to have good light-proof properties and electrical conductivity, thereby improving the imaging effect of the display area.

[0021] In one embodiment, the orthographic projections of at least two anode layers on the substrate overlap.

[0022] In this way, the manufacturing difficulty of the display panel is reduced, and the laser intensity that the anode layer can withstand can be improved without adding additional process steps, so that the structure and performance of the anode layer arranged away from the substrate are complete, and the current efficiency of the display panel is improved.

[0023] In a second aspect, the present application provides a method for manufacturing a display panel, the manufacturing method comprising:

[0024] providing a substrate;

[0025] At least two anode layers are formed in the display area, and the at least two anode layers are sequentially stacked on one side of the substrate;

[0026] forming a light-emitting layer on a side of the anode layer facing away from the substrate;

[0027] forming a cathode conductive layer, wherein the cathode conductive layer covers a side of the light-emitting layer away from the substrate;

[0028] Using at least two anode layers as masks, the cathode conductive layer is laser etched from the side of the substrate away from the anode layer to remove the cathode conductive layer not blocked by at least two anode layers, thereby forming a cathode layer in the display area. The cathode layer coincides with the orthographic projection of at least two anode layers on the substrate.

[0029] The manufacturing method of the above-mentioned display panel forms at least two stacked anode layers on a substrate. On the one hand, in the process of patterning to form a cathode layer, the anode layer arranged close to the substrate protects the anode layer arranged far away from the substrate, thereby improving the laser intensity that the anode layer can withstand, so that the structure and performance of the anode layer arranged far away from the substrate are intact, and the process of patterning to remove the film layer in the camera area under the screen to form the cathode layer avoids damaging the anode layer arranged far away from the substrate, thereby improving the current efficiency of the display panel. On the other hand, the transmittance of the camera area under the screen is also improved, which is beneficial to improving the imaging effect of the camera under the screen. On the other hand, the design of the two anode layers does not affect the structural layout of the display panel, thereby reducing the wiring difficulty of the display panel.

[0030] In one embodiment, at least two anode layers are formed in the display area, including:

[0031] sequentially forming a first anode conductive layer and a second anode conductive layer on the substrate;

[0032] forming a mask layer on the second anode conductive layer;

[0033] patterning the second anode conductive layer and the first anode conductive layer according to the mask layer to form a first anode layer and a second anode layer sequentially stacked in a direction away from the substrate on the substrate;

[0034] Optionally, the first anode layer includes a laser blocking layer.

[0035] In this way, the laser blocking layer of the first anode layer blocks the laser during the process of patterning the cathode layer, which can ensure the patterning accuracy of the cathode layer and etch away the film layer not blocked by the first anode layer. At the same time, the first anode layer protects the second anode layer, ensuring the integrity of the structure and performance of the second anode layer, thereby improving the current efficiency of the display panel.

[0036] In one embodiment, the first anode layer includes a first conductive layer and a second conductive layer sequentially stacked on the substrate in a direction away from the substrate, and at least one of the first conductive layer and the second conductive layer is an opaque metal layer;

[0037] The first conductive layer and / or the second conductive layer serves as the laser blocking layer.

[0038] In this way, the first conductive layer and / or the second conductive layer has a good ability to block lasers, the first anode layer can withstand a large laser intensity, the efficiency of forming the cathode layer using the first anode layer as a mask is higher, the pattern precision of the formed cathode layer is high, and at the same time the effect of the first anode layer protecting the second anode layer can be enhanced.

[0039] In one embodiment, the second anode layer includes a third conductive layer, a fourth conductive layer and a fifth conductive layer sequentially stacked on the first anode layer in a direction away from the substrate;

[0040] Optionally, the third conductive layer and the fifth conductive layer are light-transmitting layers, and the fourth conductive layer is an opaque metal layer.

[0041] In this way, the second anode layer is ensured to have good light-proof properties and electrical conductivity, thereby improving the imaging effect of the display area.

[0042] In a third aspect, the present application provides a display device, comprising the display panel as described in the first aspect, or a display panel manufactured by the method for manufacturing a display panel as described in the second aspect.

[0043] The above-mentioned display device, by arranging at least two stacked anode layers on the substrate, on the one hand, protects the anode layer arranged far away from the substrate with the anode layer arranged close to the substrate, thereby improving the laser intensity that the anode layer can withstand, so that the structure and performance of the anode layer arranged far away from the substrate are intact, and the process of patterned removal of the film layer in the camera area under the screen to form the cathode layer is avoided to damage the anode layer arranged far away from the substrate, thereby improving the current efficiency of the display panel, on the other hand, at the same time, the transmittance of the camera area under the screen is improved, which is beneficial to improving the imaging effect of the camera under the screen, and on still another hand, the design of the two anode layers does not affect the structural layout of the display device, thereby reducing the wiring difficulty of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 It is a structural schematic diagram of the display area and the under-screen camera area of ​​the OLED display panel in the related art;

[0046] Figure 2 A schematic diagram of the structure of a display panel provided in one embodiment of the present application;

[0047] Figure 3 In one embodiment of the present application, after forming at least two anode layers, a light-emitting layer and a cathode conductive layer on a substrate, Figure 2 Schematic diagram of the cross section along line AA;

[0048] Figure 4 A display panel provided by an embodiment of the present application Figure 2 Schematic diagram of the cross section along line AA;

[0049] Figure 5 A process flow chart of a display panel provided in accordance with an embodiment of the present application.

[0050] Description of reference numerals:

[0051] 110, display panel; 10, substrate; 11, array layer; 20, anode layer; 120, first anode layer; 121, first conductive layer; 122, second conductive layer; 220, second anode layer; 221, third conductive layer; 222, fourth conductive layer; 223, fifth conductive layer; 30, light emitting layer; 40, cathode layer; 50, pixel layer; A11, display area; A12, under-screen camera area;

[0052] 10', substrate; 11', array layer; 20', anode layer; 40', cathode layer; 50', pixel layer; 60', metal layer; A12', under-screen camera area. DETAILED DESCRIPTION

[0053] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0055] When describing positional relationships, unless otherwise specified, when an element such as a layer, film, or substrate is referred to as being "on" another element, it can be directly on the other element or there can be intervening elements. Further, when a layer is referred to as being "under" another layer, it can be directly below or there can be one or more light-emitting units. It is also understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or there can be one or more light-emitting units.

[0056] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0057] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present application.

[0058] It should also be understood that when interpreting an element, even if not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of the specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" can mean within one or more standard deviations, which are not limited here.

[0059] Furthermore, in the specification, the phrase “planar distribution schematic diagram” refers to a drawing when a target portion is viewed from above, and the phrase “cross-sectional schematic diagram” refers to a drawing when a section taken by vertically cutting the target portion is viewed from the side.

[0060] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0061] As described in the background technology, smart devices are currently developing towards full screens. In order to increase the screen-to-body ratio, the front camera is usually placed below the screen. Figure 1 It is necessary to remove the cathode layer 40 ′ of the under-screen camera area A12 ′ to improve the light transmittance of the under-screen camera area A12 ′ and to improve the imaging quality of the under-screen camera.

[0062] In the related art, refer to Figure 1, laser etching is used to ablate and remove the cathode layer 40' in the camera area under the screen to improve the screen transmittance of the camera area A12' under the screen. This requires adding a patterned metal layer 60' as a mask to the array layer 11' on the substrate 10'. The metal layer 60' shields the pixel area of ​​the pixel layer 50' to protect the anode layer 20' and prevents the cathode layer 40' in the camera area A12' under the screen from being damaged by the laser etching process. However, adding the metal layer 60' requires additional processes, which increases processing time and cost. The presence of the metal layer 60' also increases the difficulty of wiring the display panel.

[0063] Based on the above reasons, the present invention provides a display panel and a display device. By arranging at least two stacked anode layers on a substrate, on the one hand, the anode layer arranged far away from the substrate is protected by the anode layer arranged close to the substrate, thereby improving the laser intensity that the anode layer can withstand, so that the structure and performance of the anode layer arranged far away from the substrate are complete, and the process of patterned removal of the film layer in the camera area under the screen to form a cathode layer is avoided to damage the anode layer arranged far away from the substrate, thereby improving the current efficiency of the display panel. On the other hand, the transmittance of the camera area under the screen is also improved, which is beneficial to improving the imaging effect of the camera under the screen. On the other hand, the design of the two anode layers does not affect the structural layout of the display panel, thereby reducing the wiring difficulty of the display panel.

[0064] In a first aspect, an embodiment of the present application provides a display panel 110, which may include a flexible display panel having only a display function, or a flexible display panel having a touch function. The flexible display panel may be, for example, a flexible OLED (Organic Light-Emitting Diode) display panel, a flexible liquid crystal display panel (LCD), or other types of flexible display panels.

[0065] Specifically, refer to Figure 2 , Figure 3 and Figure 4 As shown, the display panel 110 has a display area A11 and an under-screen camera area A12, wherein the display area A11 surrounds the under-screen camera area A12; wherein the display area A11 may be circular or rectangular, and the under-screen camera area A12 may also be circular or rectangular.

[0066] The display panel 110 also includes a substrate 10, at least two anode layers 20, a light-emitting layer 30 and a cathode layer 40; at least two anode layers 20 are arranged in the display area A11, and at least two anode layers 20 are stacked in sequence on one side of the substrate 10; the light-emitting layer 30 is arranged on the side of the anode layer 20 away from the substrate 10; the cathode layer 40 is arranged on the side of the light-emitting layer 30 away from the substrate 10, and the cathode layer 40 coincides with the orthographic projection of the at least two anode layers 20 on the substrate 10.

[0067] The substrate 10 may be flexible polyimide (PI), rigid glass or a thin metal sheet, etc. The present application embodiment will not discuss other materials of the substrate 10 in detail, and those skilled in the art may select different types of materials according to actual needs.

[0068] In this embodiment, the substrate 10 is an array substrate. An array layer 11 is disposed on the substrate 10 . The array layer 11 includes thin film transistors (not shown in the figure) arranged in an array.

[0069] A pixel layer 50 is provided on the side of the array layer 11 away from the substrate 10. The pixel layer 50 includes a plurality of independently arranged sub-pixels (not shown in the figure). The sub-pixels of the pixel layer 50 are connected to the thin film transistors of the array substrate in a one-to-one correspondence, and pixel openings are formed between adjacent sub-pixels. The display area A11 and the under-screen camera area A12 of the display panel 110 are both distributed with sub-pixels and pixel openings composed of sub-pixels.

[0070] At least two anode layers 20, light-emitting layers 30, and cathode layers 40 are sequentially formed and stacked in the pixel opening (not shown) of the display area A11. The cathode layer 40 is obtained by laser etching the cathode conductive layer 40a using at least two anode layers 20 as a mask. The orthographic projection of the cathode layer 40 on the substrate 10 completely overlaps with the orthographic projection of at least two anode layers 20 on the substrate 10. The orthographic projection of at least two anode layers 20 on the substrate 10 is in a grid shape to ensure that the display area A11 has good light transmittance and image quality. There is no cathode layer 40 in the pixel opening of the under-screen camera area A12, and the under-screen camera area A12 has good light transmittance.

[0071] The above-mentioned display panel 110, by arranging at least two stacked anode layers 20 on the substrate 10, on the one hand, protects the anode layer 20 arranged far away from the substrate 10 with the anode layer 20 arranged close to the substrate 10, thereby improving the laser intensity that the anode layer 20 can withstand, so that the structure and performance of the anode layer 20 arranged far away from the substrate 10 are complete, and the process of patterned removal of the film layer in the under-screen camera area A12 to form the cathode layer 40 is avoided to damage the anode layer 20 arranged far away from the substrate 10, thereby improving the current efficiency of the display panel 110, and on the other hand, at the same time, the transmittance of the under-screen camera area A12 is improved, which is beneficial to improving the imaging effect of the under-screen camera, and on the other hand, the design of the two anode layers 20 does not affect the structural layout of the display panel 110, thereby reducing the wiring difficulty of the display panel 110.

[0072] In one embodiment, referring to Figure 2 , Figure 4 As shown, at least two anode layers 20 include a first anode layer 120 and a second anode layer 220 stacked on the substrate 10 in sequence in a direction away from the substrate 10; the first anode layer 120 includes a laser blocking layer. The first anode layer 120 can be a single layer or a multi-layer structure, and the second anode layer 220 can be a single crystal or a multi-layer structure. In the process of laser etching to remove the cathode conductive layer 40a of the camera area A12 under the screen, the first anode layer 120 is used to block the laser to prevent the laser from damaging the second anode layer 220, while ensuring the accurate transfer of the pattern of the first anode layer 120, thereby improving the pattern accuracy of the formed cathode layer 40.

[0073] In this way, the laser blocking layer of the first anode layer 120 blocks the laser during the process of patterning the cathode layer 40, which can ensure the patterning accuracy of the cathode layer 40 and etch away the film layer not blocked by the first anode layer 120. At the same time, the first anode layer 120 protects the second anode layer 220, ensuring the integrity of the structure and performance of the second anode layer 220, thereby improving the current efficiency of the display panel 110.

[0074] In one embodiment, referring to Figure 2 , Figure 4 As shown, the first anode layer 120 includes a first conductive layer 121 and a second conductive layer 122 which are stacked in sequence on the substrate 10 in a direction away from the substrate 10, and at least one of the first conductive layer 121 and the second conductive layer 122 is an opaque metal layer; the first conductive layer 121 and / or the second conductive layer 122 serve as a laser blocking layer.

[0075] The first conductive layer 121 and the second conductive layer 122 may both be opaque metal layers, or one of the first conductive layer 121 and the second conductive layer 122 may be an opaque metal layer and the other may be a translucent layer.

[0076] In one example, referring to Figure 2 , Figure 4 As shown, the first conductive layer 121 and the second conductive layer 122 are opaque metal layers; in another example, the first conductive layer 121 is an opaque metal layer and the second conductive layer 122 is a light-transmitting layer; in yet another example, the first conductive layer 121 is a light-transmitting layer and the second conductive layer 122 is an opaque metal layer.

[0077] For example, the material of the opaque metal layer can be selected from at least one of molybdenum metal, silver metal or aluminum metal; the material of the light-transmitting layer can be selected from at least one of tin oxide, zinc oxide, cadmium oxide, indium oxide, indium tin oxide, zinc indium oxide, zinc gallium oxide, zinc aluminum oxide, titanium tantalum oxide, titanium nitride fluorine-doped tin oxide, polyethyl bis(ether thiophene) and polyethyl bis(ether thiophene)-polystyrene sulfonate.

[0078] In this way, the first conductive layer 121 and / or the second conductive layer 122 have good laser blocking capabilities, the first anode layer 120 can withstand a large laser intensity, the efficiency of forming the cathode layer 40 using the first anode layer 120 as a mask is higher, the pattern precision of the formed cathode layer 40 is high, and at the same time, the effect of the first anode layer 120 in protecting the second anode layer 220 can be enhanced.

[0079] In one embodiment, referring to Figure 2 , Figure 4 As shown, the second anode layer 220 includes a third conductive layer 221, a fourth conductive layer 222, and a fifth conductive layer 223 which are sequentially stacked on the first anode layer 120 in a direction away from the substrate 10; specifically, the third conductive layer 221 and the fifth conductive layer 223 are light-transmitting layers, and the fourth conductive layer 222 is an opaque metal layer. The opaque fourth conductive layer 222 of the second anode layer 220 is spaced apart from the opaque laser blocking layer of the first anode layer 120, and the first anode layer 120 acts as a mask to better protect the second anode layer 220. In this way, the second anode layer 220 is ensured to have good opacity and conductivity, thereby improving the imaging effect of the display area A11.

[0080] In one example, referring to Figure 2 , Figure 4 As shown, the first anode layer 120 includes an indium tin oxide layer and a metal silver layer stacked in sequence in the pixel opening of the display area A11 in a direction away from the substrate 10, and the second anode layer 220 includes an indium tin oxide layer, a metal silver layer and a metal silver layer stacked in sequence on the metal silver layer of the first anode layer 120 in a direction away from the substrate 10. Such a configuration ensures the structural and functional integrity of the second anode layer 220 to a greater extent, and improves the current efficiency of the display panel 110 at the same brightness.

[0081] In one embodiment, referring to Figure 2 , Figure 3 , Figure 4 As shown, the orthographic projections of at least two anode layers 20 on the substrate 10 overlap. In this way, the manufacturing difficulty of the display panel 110 is reduced, and the laser intensity that the anode layer 20 can withstand can be increased without adding additional process steps, so that the structure and performance of the anode layer 20 set away from the substrate 10 are complete, and the current efficiency of the display panel 110 is improved.

[0082] Based on the same inventive concept, an embodiment of the present application provides a method for manufacturing a display panel, wherein the display panel 110 has a display area A11 and an under-screen camera area A12. Figure 5 The process flow chart of the method for manufacturing the display panel of this embodiment is shown as follows: Figure 5 As shown, the manufacturing method of the display panel includes:

[0083] Step S11: providing a substrate 10;

[0084] Step S12: forming at least two anode layers 20 in the display area A11, wherein the at least two anode layers 20 are sequentially stacked on one side of the substrate 10;

[0085] Step S13: forming a light emitting layer 30 on the side of the anode layer 20 facing away from the substrate 10;

[0086] Step S14: forming a cathode conductive layer 40 a, wherein the cathode conductive layer 40 a covers a side of the light emitting layer 30 away from the substrate 10;

[0087] Step S15: Using at least two anode layers 20 as a mask, laser etch the cathode conductive layer 40a from the side of the substrate 10 away from the anode layer 20 to remove the cathode conductive layer 40a not blocked by the at least two anode layers 20, and form a cathode layer 40 in the display area A11. The cathode layer 40 coincides with the orthographic projection of the at least two anode layers 20 on the substrate 10.

[0088] Reference Figure 2 , Figure 3 , Figure 4 As shown, the substrate 10 may be flexible polyimide (PI), rigid glass or thin metal sheet, etc. The present application embodiment will not discuss other materials of the substrate 10 in detail, and those skilled in the art may select different types of materials according to actual needs.

[0089] In this embodiment, the substrate 10 is an array substrate. An array layer 11 is disposed on the substrate 10 . The array layer 11 includes thin film transistors arranged in an array.

[0090] Reference Figure 2 , Figure 3 , Figure 4As shown, before at least two anode layers 20 are formed in the display area A11, a pixel layer 50 is formed on the side of the array layer 11 away from the substrate 10. The pixel layer 50 includes a plurality of independently arranged sub-pixels. The sub-pixels in the pixel layer 50 are connected to the thin film transistors of the array substrate in a one-to-one correspondence, and pixel openings are formed between adjacent sub-pixels. The display area A11 and the under-screen camera area A12 of the display panel 110 are both distributed with sub-pixels and pixel openings composed of sub-pixels.

[0091] At least two anode layers 20, light-emitting layers 30, and cathode conductive layers 40a are sequentially formed and stacked in the pixel opening of the display area A11. The cathode conductive layer 40a is laser-etched using at least two anode layers 20 as a mask to obtain the cathode layer 40. The orthographic projection of the cathode layer 40 on the substrate 10 completely overlaps with the orthographic projection of at least two anode layers 20 on the substrate 10. Among them, the orthographic projection of at least two anode layers 20 on the substrate 10 is in a grid shape to ensure that the display area A11 has good light transmittance and image quality. There is no cathode layer 40 in the pixel opening of the under-screen camera area A12, and the under-screen camera area A12 has good light transmittance.

[0092] The manufacturing method of the above-mentioned display panel forms at least two stacked anode layers 20 on the substrate 10. On the one hand, in the process of patterning the cathode layer 40, the anode layer 20 arranged close to the substrate 10 protects the anode layer 20 arranged far away from the substrate 10, thereby improving the laser intensity that the anode layer 20 can withstand, so that the structure and performance of the anode layer 20 arranged far away from the substrate 10 are intact, and the process of patterning and removing the film layer in the under-screen camera area A12 to form the cathode layer 40 avoids damaging the anode layer 20 arranged far away from the substrate 10, thereby improving the current efficiency of the display panel 110. On the other hand, the transmittance of the under-screen camera area A12 is also improved, which is beneficial to improving the imaging effect of the under-screen camera. On the other hand, the design of the two anode layers 20 does not affect the structural layout of the display panel 110, thereby reducing the wiring difficulty of the display panel 110.

[0093] In one embodiment, at least two anode layers 20 are formed in the display area A11, including:

[0094] Step S121: forming a first anode conductive layer and a second anode conductive layer in sequence on the substrate 10;

[0095] Step S122: forming a mask layer on the second anode conductive layer;

[0096] Step S123 : patterning the second anode conductive layer and the first anode conductive layer according to the mask layer to form a first anode layer 120 and a second anode layer 220 stacked in sequence in a direction away from the substrate 10 on the substrate 10 .

[0097] Specifically, the first anode layer 120 includes a laser blocking layer.

[0098] Reference Figure 2 , Figure 3 , Figure 4 As shown, a first anode conductive layer (not shown in the figure) and a second anode conductive layer (not shown in the figure) can be sequentially deposited to form a single-layer or multi-layer structure, and the second anode conductive layer can be a single crystal or multi-layer structure.

[0099] Reference Figure 2 , Figure 3 , Figure 4 As shown, after forming a mask layer on the second anode conductive layer, the second anode conductive layer and the first anode conductive layer exposed by the mask layer are removed by etching according to the mask layer, and the first anode conductive layer and the second anode conductive layer in each pixel opening are retained to form a stacked first anode layer 120 and a second anode layer 220. The first anode layer 120 and the second anode layer 220 are formed in the same yellow light process (including glue coating, soft baking, exposure, development, and hard baking) and the same patterning process, which saves process steps and reduces process costs. In addition, the stacking of the first anode layer 120 and the second anode layer 220 does not occupy additional space, which is beneficial to the wiring of the display panel 110.

[0100] In this way, the laser blocking layer of the first anode layer 120 blocks the laser during the process of patterning the cathode layer 40, which can ensure the patterning accuracy of the cathode layer 40 and etch away the film layer not blocked by the first anode layer 120. At the same time, the first anode layer 120 protects the second anode layer 220, ensuring the integrity of the structure and performance of the second anode layer 220, thereby improving the current efficiency of the display panel 110.

[0101] In one embodiment, referring to Figure 2 , Figure 3 , Figure 4 As shown, the first anode layer 120 includes a first conductive layer 121 and a second conductive layer 122 which are sequentially stacked on the substrate 10 in a direction away from the substrate 10, and at least one of the first conductive layer 121 and the second conductive layer 122 is an opaque metal layer; the first conductive layer 121 and / or the second conductive layer 122 serve as a laser blocking layer. The first conductive layer 121 and the second conductive layer 122 may both be opaque metal layers, or one of the first conductive layer 121 and the second conductive layer 122 may be an opaque metal layer, and the other may be a light-transmitting layer.

[0102] In one example, the first conductive layer 121 and the second conductive layer 122 are opaque metal layers; in another example, the first conductive layer 121 is an opaque metal layer and the second conductive layer 122 is a light-transmitting layer; in yet another example, the first conductive layer 121 is a light-transmitting layer and the second conductive layer 122 is an opaque metal layer.

[0103] For example, the material of the opaque metal layer can be selected from at least one of molybdenum metal, silver metal or aluminum metal; the material of the light-transmitting layer can be selected from at least one of tin oxide, zinc oxide, cadmium oxide, indium oxide, indium tin oxide, zinc indium oxide, zinc gallium oxide, zinc aluminum oxide, titanium tantalum oxide, titanium nitride fluorine-doped tin oxide, polyethyl bis(ether thiophene) and polyethyl bis(ether thiophene)-polystyrene sulfonate.

[0104] In this way, the first conductive layer 121 and / or the second conductive layer 122 have good laser blocking capabilities, the first anode layer 120 can withstand a large laser intensity, the efficiency of forming the cathode layer 40 using the first anode layer 120 as a mask is higher, the pattern precision of the formed cathode layer 40 is high, and at the same time, the effect of the first anode layer 120 in protecting the second anode layer 220 can be enhanced.

[0105] In one embodiment, referring to Figure 2 , Figure 3 , Figure 4 As shown, the second anode layer 220 includes a third conductive layer 221, a fourth conductive layer 222, and a fifth conductive layer 223 which are sequentially stacked on the first anode layer 120 in a direction away from the substrate 10; specifically, the third conductive layer 221 and the fifth conductive layer 223 are light-transmitting layers, and the fourth conductive layer 222 is an opaque metal layer. The opaque fourth conductive layer 222 of the second anode layer 220 is spaced apart from the opaque laser blocking layer of the first anode layer 120, and the first anode layer 120 acts as a mask to better protect the second anode layer 220. In this way, the second anode layer 220 is ensured to have good opacity and conductivity, thereby improving the imaging effect of the display area A11.

[0106] In one example, referring to Figure 2 , Figure 3 , Figure 4 As shown, the first anode layer 120 includes an indium tin oxide layer and a metal silver layer stacked in sequence in the pixel opening of the display area A11 in a direction away from the substrate 10, and the second anode layer 220 includes an indium tin oxide layer, a metal silver layer and a metal silver layer stacked in sequence on the metal silver layer of the first anode layer 120 in a direction away from the substrate 10. Such a configuration ensures the structural and functional integrity of the second anode layer 220 to a greater extent, and improves the current efficiency of the display panel 110 at the same brightness.

[0107] Based on the same inventive concept, an embodiment of the present application further provides a display device (not shown), which includes the display panel 110 in the above embodiment, or includes the display panel 110 manufactured by the manufacturing method of the display panel in the above embodiment.

[0108] It can be understood that the display device in the embodiments of the present application can be an OLED display device, a QLED display device, electronic paper, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, a wearable device, an Internet of Things device, or any other product or component with a display function, and the embodiments disclosed in the present application are not limited to this.

[0109] The above-mentioned display device, by arranging at least two stacked anode layers 20 on the substrate 10, on the one hand, protects the anode layer 20 arranged far away from the substrate 10 with the anode layer 20 arranged close to the substrate 10, thereby improving the laser intensity that the anode layer 20 can withstand, so that the structure and performance of the anode layer 20 arranged far away from the substrate 10 are complete, and the process of patterned removal of the film layer in the under-screen camera area A12 to form the cathode layer 40 is avoided to damage the anode layer 20 arranged far away from the substrate 10, thereby improving the current efficiency of the display panel 110, and on the other hand, at the same time, the transmittance of the under-screen camera area A12 is improved, which is beneficial to improving the imaging effect of the under-screen camera, and on the other hand, the design of the two anode layers 20 does not affect the structural layout of the display device, thereby reducing the wiring difficulty of the display panel 110.

[0110] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0111] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: The display panel comprises: substrate; At least two anode layers are provided in the display area, and at least two anode layers are sequentially stacked on one side of the substrate; A light-emitting layer is disposed on a side of the anode layer away from the substrate; The cathode layer is arranged on the side of the light-emitting layer away from the substrate, and the cathode layer overlaps with the orthographic projections of at least two anode layers on the substrate.

2. The display panel according to claim 1, characterized in that: The at least two anode layers include a first anode layer and a second anode layer which are sequentially stacked on the substrate in a direction away from the substrate; Optionally, the first anode layer includes a laser blocking layer.

3. The display panel according to claim 2, characterized in that: The first anode layer includes a first conductive layer and a second conductive layer sequentially stacked on the substrate in a direction away from the substrate, and at least one of the first conductive layer and the second conductive layer is an opaque metal layer; The first conductive layer and / or the second conductive layer serves as the laser blocking layer.

4. The display panel according to claim 3, characterized in that: The second anode layer includes a third conductive layer, a fourth conductive layer and a fifth conductive layer which are sequentially stacked on the first anode layer in a direction away from the substrate; Optionally, the third conductive layer and the fifth conductive layer are light-transmitting layers, and the fourth conductive layer is an opaque metal layer.

5. The display panel according to any one of claims 1 to 4, characterized in that: Orthographic projections of at least two anode layers on the substrate overlap.

6. A method for manufacturing a display panel, characterized in that: The production method comprises: providing a substrate; At least two anode layers are formed in the display area, and the at least two anode layers are sequentially stacked on one side of the substrate; forming a light-emitting layer on a side of the anode layer facing away from the substrate; forming a cathode conductive layer, wherein the cathode conductive layer covers a side of the light-emitting layer away from the substrate; Using at least two anode layers as masks, the cathode conductive layer is laser etched from the side of the substrate away from the anode layer to remove the cathode conductive layer not blocked by at least two anode layers, thereby forming a cathode layer in the display area. The cathode layer coincides with the orthographic projection of at least two anode layers on the substrate.

7. The method for manufacturing a display panel according to claim 6, characterized in that: At least two anode layers are formed in the display area, including: sequentially forming a first anode conductive layer and a second anode conductive layer on the substrate; forming a mask layer on the second anode conductive layer; patterning the second anode conductive layer and the first anode conductive layer according to the mask layer to form a first anode layer and a second anode layer sequentially stacked in a direction away from the substrate on the substrate; Optionally, the first anode layer includes a laser blocking layer.

8. The method for manufacturing a display panel according to claim 7, characterized in that: The first anode layer includes a first conductive layer and a second conductive layer sequentially stacked on the substrate in a direction away from the substrate, and at least one of the first conductive layer and the second conductive layer is an opaque metal layer; The first conductive layer and / or the second conductive layer serves as the laser blocking layer.

9. The method for manufacturing a display panel according to claim 8, characterized in that: The second anode layer includes a third conductive layer, a fourth conductive layer and a fifth conductive layer which are sequentially stacked on the first anode layer in a direction away from the substrate; Optionally, the third conductive layer and the fifth conductive layer are light-transmitting layers, and the fourth conductive layer is an opaque metal layer.

10. A display device, characterized in that: A display panel comprising the display panel as claimed in any one of claims 1 to 5, or a display panel manufactured by the method for manufacturing a display panel as claimed in any one of claims 6 to 9.

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