Array substrate, display panel, display device, and method for manufacturing display panel

Abstract

The present application provides an array substrate, a display panel, a display device, and a method for manufacturing a display panel, wherein the array substrate includes a stacked substrate, a first signal line layer, a second signal line layer, and a functional film layer. The first signal line layer is located on one side of the substrate, and the first signal line layer includes a plurality of first transparent conductive portions located within a first display area. The second signal line layer is located on a side of the first signal line layer facing away from the substrate, and the second signal line layer includes a plurality of second transparent conductive portions located within the first display area. The functional film layer is located between the first signal line layer and the second signal line layer, and the functional film layer includes a through hole that penetrates the functional film layer along the thickness direction of the substrate, and one of the first transparent conductive portion and the second transparent conductive portion is electrically connected to the other through the through hole. A plurality of metal blocks are provided on the side of the functional film layer facing the substrate, and the orthographic projection of at least one metal block on the substrate at least partially overlaps with the orthographic projection of the through hole on the substrate.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to an array substrate, a display panel, a display device, and a method for manufacturing a display panel. Background Art

[0002] With the rapid development of electronic devices, users have higher and higher requirements for screen-to-body ratio, making the full-screen display of electronic devices receive more and more attention in the industry.

[0003] Electronic devices such as mobile phones and tablets require integration of photosensitive components such as a front-facing camera, infrared sensor, and proximity sensor on one side of the display panel. In some solutions, a photosensitive area can be provided on the electronic device, with the photosensitive components positioned behind the area. The area itself can also be equipped with luminous pixels to achieve a luminous effect. This allows the electronic device to achieve a full-screen display while ensuring the normal operation of the photosensitive components. Summary of the Invention

[0004] Embodiments of the present application provide an array substrate, a display panel, a display device, and a method for manufacturing a display panel, which can reduce the risk of dark spots or virtual dark spots appearing in a first display area.

[0005] In a first aspect, an embodiment of the present application provides an array substrate having a first display area and a second display area, wherein the transmittance of the first display area is greater than the transmittance of the second display area, and the array substrate includes a stacked substrate, a first signal line layer, a second signal line layer, and a functional film layer.

[0006] The first signal line layer is located on one side of the substrate and includes a plurality of first transparent conductive portions located within the first display area. The second signal line layer is located on a side of the first signal line layer facing away from the substrate and includes a plurality of second transparent conductive portions located within the first display area. A functional film layer is located between the first and second signal line layers and includes a through hole extending through the functional film layer along the thickness of the substrate. One of the first and second transparent conductive portions is electrically connected to the other via the through hole. A plurality of metal blocks are disposed on the side of the functional film layer facing the substrate, and the orthographic projection of at least one metal block on the substrate at least partially overlaps with the orthographic projection of the through hole on the substrate.

[0007] In some embodiments, the metal block is located on a side of the first signal line layer facing the substrate.

[0008] In some embodiments, the display panel further includes a metal conductive portion located in the second display area, and the metal block and the metal conductive portion are disposed in the same layer.

[0009] In some embodiments, the metal block is located in the first signal line layer, and a portion of the second transparent conductive portion is located in the through hole and is electrically connected to the first transparent conductive portion through the metal block.

[0010] In some embodiments, the functional film layer includes an insulating layer.

[0011] In some embodiments, both sides of the insulating layer in the thickness direction are in contact with the first signal line layer and the second signal line layer, respectively.

[0012] In some embodiments, the first transparent conductive portion and the second transparent conductive portion are electrically connected through a plurality of through-holes.

[0013] In some embodiments, an orthographic projection of the first transparent conductive portion and / or the second transparent conductive portion on the substrate covers a plurality of through holes.

[0014] In the second aspect, an embodiment of the present application provides a display panel, comprising an array substrate of any of the aforementioned embodiments, and a first electrode layer, the first electrode layer being at least partially located on the side of the second signal line layer facing away from the substrate, the first electrode layer comprising a plurality of first electrodes for forming a light-emitting unit, and the second transparent conductive portion being electrically connected to the first electrode.

[0015] In some embodiments, the orthographic projection of the first electrode on the substrate at least partially overlaps with the orthographic projection of the through hole on the substrate, and the first electrode includes a main body located on the side of the functional film layer facing away from the substrate and a conductive reinforcement portion located in the through hole.

[0016] In some embodiments, an orthographic projection of the first electrode on the substrate at least partially overlaps with an orthographic projection of the metal block on the substrate.

[0017] In some embodiments, an orthographic projection of the first electrode on the substrate covers an orthographic projection of the through hole on the substrate.

[0018] In a third aspect, an embodiment of the present application provides a display device, comprising the display panel in any of the aforementioned embodiments.

[0019] In a fourth aspect, an embodiment of the present application provides a method for manufacturing a display panel, wherein the display panel has a first display area and a second display area, wherein the transmittance of the first display area is greater than that of the second display area, and the manufacturing method includes:

[0020] forming a plurality of metal blocks and a first signal line layer located in the first display area on one side of the substrate, wherein the first signal line layer includes a first transparent conductive portion located in the first display area;

[0021] forming a functional film layer on a side of the first signal line layer facing away from the substrate, and exposing the functional film layer to form a through hole penetrating along the thickness direction of the substrate, wherein an orthographic projection of the through hole on the substrate at least partially overlaps with an orthographic projection of the metal block on the substrate;

[0022] A second signal line layer is formed on the side of the functional film layer facing away from the substrate. The second signal line layer includes a second transparent conductive portion located in the first display area. One of the first transparent conductive portion and the second transparent conductive portion is electrically connected to the other through a through hole.

[0023] In some embodiments, after forming the second signal line layer on the side of the functional film layer facing away from the substrate, the method further includes:

[0024] A first electrode layer is formed on a side of the second signal line layer facing away from the substrate, and a portion of electrode material in the first electrode layer is deposited in the through hole to form a conductive reinforcement portion.

[0025] Embodiments of the present application provide an array substrate, a display panel, a display device, and a method for preparing a display panel. The array substrate is provided with a plurality of metal blocks on the side of the functional film layer facing the substrate, and the orthographic projection of the metal blocks on the substrate is at least partially overlapped with the orthographic projection of the through hole on the substrate, so that during the exposure process, the exposure light can be reflected by the metal blocks to perform a second exposure on the through hole, so that the aperture size of the through hole is increased, thereby reducing the risk of dark spots or virtual dark spots in the first display area of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 This is a schematic structural diagram of an array substrate provided in an embodiment of the present application;

[0028] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of the middle region Q;

[0029] Figure 3 superior Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0030] Figure 4 is a schematic cross-sectional structural diagram of another array substrate provided in an embodiment of the present application;

[0031] Figure 5 is a schematic cross-sectional structural diagram of another array substrate provided in an embodiment of the present application;

[0032] Figure 6 is a schematic cross-sectional structural diagram of another array substrate provided in an embodiment of the present application;

[0033] Figure 7 is a schematic cross-sectional structural diagram of a display panel provided in an embodiment of the present application;

[0034] Figure 8 is a structural schematic diagram of a display device provided in an embodiment of the present application;

[0035] Figure 9 is a flow chart of a method for manufacturing a display panel provided in an embodiment of the present application;

[0036] Figures 10a to 10c This is a schematic diagram of a process of a method for manufacturing a display panel provided in an embodiment of the present application;

[0037] Figure 11 This is a flow chart of another method for manufacturing a display panel provided in an embodiment of the present application;

[0038] Figure 12 This is a process diagram of another method for preparing a display panel provided in an embodiment of the present application;.

[0039] Marking Description:

[0040] 1. Substrate;

[0041] 2. First signal line layer; 21. First transparent conductive portion;

[0042] 3. Second signal line layer; 31. Second transparent conductive portion;

[0043] 4. Functional film layer; 41. Insulation layer;

[0044] 5. Metal blocks;

[0045] 6. First electrode layer; 61. First electrode; 611. Main body; 612. Conductive reinforcement portion;

[0046] HL, through hole; PX, light-emitting unit;

[0047] FA, first display area; AA, second display area; TA, transition area;

[0048] X, thickness direction. DETAILED DESCRIPTION

[0049] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0050] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0051] With the advancement of technology, people's requirements for display panels are getting higher and higher, not only for the resolution of display panels, but also for the display effect. Based on this, full-screen display panels came into being. Full-screen display panels include a first display area and a second display area. Both display areas are equipped with light-emitting units to achieve the display effect. Since the first display area also needs to realize the light-sensing function, the transmittance of the first display area is often greater than that of the second display area.

[0052] The applicant has found through research that dark spots or virtual dark spots are prone to appear in the first display area. This is because the conduction effect between different conductive layers in the first display area is often lower than the conduction effect between different conductive layers in the second display area. Specifically, some film layers in the display panel need to be provided with through-hole structures (such as vias) to electrically connect the signal lines of different layers, and the through-hole structures are usually prepared and formed by exposure. In order to improve the transmittance of the first display area, some film layers in the first display area will be set as transparent film layers. When the through-hole structure is formed in the first display area by exposure, the exposure light can completely pass through the display panel; and for the second display area, due to the presence of a metal layer inside, the exposure light can be partially reflected and form a secondary exposure. This makes the through-hole size in the second display area often larger than the through-hole size in the first display area, and the conduction effect between different film layers in the first display area is poorer than that in the second display area, which makes it easy for dark spots or virtual dark spots to appear in the first display area.

[0053] To solve the above problem, please refer to Figures 1 to 3 An embodiment of the present application provides an array substrate having a first display area FA and a second display area AA, wherein the transmittance of the first display area FA is greater than the transmittance of the second display area AA, and the array substrate includes a stacked substrate 1, a first signal line layer 2, a second signal line layer 3, and a functional film layer 4.

[0054] A first signal line layer 2 is located on one side of the substrate 1 and includes a plurality of first transparent conductive portions 21 located within the first display area FA. A second signal line layer 3 is located on the side of the first signal line layer 2 facing away from the substrate 1 and includes a plurality of second transparent conductive portions 31 located within the first display area FA. A functional film layer 4 is located between the first and second signal line layers 2 and 3. The functional film layer 4 includes a through hole HL extending through the functional film layer 4 along the thickness direction X of the substrate 1. One of the first transparent conductive portions 21 and the second transparent conductive portion 31 is electrically connected to the other through the through hole HL. A plurality of metal blocks 5 are disposed on the side of the functional film layer 4 facing the substrate 1. The orthographic projection of at least one metal block 5 on the substrate 1 at least partially overlaps with the orthographic projection of the through hole HL on the substrate 1.

[0055] The first display area FA and the second display area AA in the array substrate are the same as the first display area FA and the second display area AA in the display panel formed subsequently, and the embodiments of the present application will not be repeated here. The first display area FA and the second display area AA of the display panel both include a light-emitting unit PX for achieving a full-screen display effect. At the same time, photosensitive components such as a front camera, an infrared light sensor, and a proximity light sensor need to be arranged at the position of the first display area FA. Therefore, the transmittance of the first display area FA needs to be greater than the transmittance of the second display area AA, so that the photosensitive function can be better realized. Preferably, the average transmittance of visible light in the first display area FA is greater than 10%, or even greater than 20%, 30%, or 40%. The range of visible light can generally be regarded as light waves with a wavelength in the range of 380nm to 780nm.

[0056] Because the first display area FA requires high transmittance, the substrate 1 within the first display area FA is typically a transparent film layer, and can be made of a light-transmitting material such as glass or polyimide (PI). The substrate 1 within the second display area AA can include a transparent film layer or an opaque material such as a metal film layer.

[0057] Both the first signal line layer 2 and the second signal line layer 3 transmit signals, thereby enabling display or touch functions of the display panel. The first signal line layer 2 and the second signal line layer 3 include a first transparent conductive portion 21 and a second transparent conductive portion 31, respectively, within the first display area FA. The specific functions of the first transparent conductive portion 21 and the second transparent conductive portion 31 are not limited in this embodiment of the present application. Optionally, the first transparent conductive portion 21 and the second transparent conductive portion 31 include indium tin oxide (ITO) material.

[0058] To achieve a higher transmittance in the first display area FA, the first and second signal line layers 2 and 3 are transparent in the first display area FA. Furthermore, because the second display area AA does not require a high transmittance, metal traces, such as opaque metal traces (Ti / Al / Ti traces), can be provided in the first and second signal line layers 2 and 3 within the second display area AA.

[0059] The functional film layer 4 is disposed between the first signal line layer 2 and the second signal line layer 3 to prevent large-area contact between the first and second signal line layers 2 and 3, which could lead to circuit problems such as short circuits. The functional film layer 4 can include a variety of different film layers to achieve different functional effects. For example, the functional film layer 4 may include a planarization layer, a buffer layer, and an insulating layer 41.

[0060] The through hole HL is set through the functional film layer 4. Figure 2 The through hole HL is indicated by a dashed line. When the functional film layer 4 comprises multiple different film layers, each layer has a sub-hole extending through it along the thickness direction X. Multiple sub-holes are interconnected to form the through hole HL. The through hole HL is used to achieve electrical connection between the first transparent conductive portion 21 and the second transparent conductive portion 31. Specifically, a portion of the material of one of the first transparent conductive portion 21 and the second transparent conductive portion 31 is located within the through hole HL and extends to the location of the other portion to achieve contact and connection. For example, the second transparent conductive portion 31 is partially located within the through hole HL.

[0061] The metal block 5 is arranged on the side of the functional film layer 4 facing the substrate 1. The metal block 5 can be located in the first signal line layer 2 or on the side of the first signal line layer 2 facing the substrate 1. This embodiment of the application does not limit this.

[0062] In the embodiment of the present application, a plurality of metal blocks 5 are provided on the side of the functional film layer 4 facing the substrate 1, and the orthographic projection of the metal block 5 on the substrate 1 is at least partially overlapped with the orthographic projection of the through hole HL on the substrate 1, so that during the exposure process, the exposure light can be reflected by the metal block 5, thereby performing a secondary exposure on the through hole HL, so that the aperture size of the through hole HL is increased, thereby reducing the risk of dark spots or virtual dark spots in the first display area FA of the display panel.

[0063] It should be noted that the array substrate provided in the embodiment of the present application is applicable to liquid crystal display panels, organic light emitting display panels, and other types of display panels.

[0064] In some embodiments, as Figures 1 to 3 As shown, the metal block 5 is located on the side of the first signal line layer 2 facing the substrate 1 .

[0065] In this embodiment of the present application, the metal block 5 is located on a different layer than the first signal line layer 2. For example, the metal block 5 is located on the same layer as the substrate 1. Specifically, the substrate 1 within the first display area FA is partially transparent and partially reflective. When preparing the substrate 1, a transparent substrate 1 can be first formed within the first display area FA, and then a portion of the material within the transparent substrate 1 can be removed and filled with metal material.

[0066] In some embodiments, the display panel further includes a metal conductive portion located in the second display area AA, and the metal block 5 is provided in the same layer as the metal conductive portion.

[0067] The metal conductive portion is a metal trace located at a different location from the first signal line layer 2 and the second signal line layer 3. The metal conductive portion can be a power line or a gate line, etc., and this embodiment of the present application is not limited thereto. Optionally, the metal block 5 and the metal conductive portion are made of the same material, so that the metal block 5 and the metal conductive portion can be simultaneously prepared and formed in a single preparation step.

[0068] In some embodiments, see Figure 1 and Figure 4 The metal block 5 is located in the first signal line layer 2 , and a portion of the second transparent conductive portion 31 is located in the through hole HL and is electrically connected to the first transparent conductive portion 21 through the metal block 5 .

[0069] In the embodiment of the present application, the metal block 5 and the first transparent conductive portion 21 are both located within the first signal line layer 2, allowing direct contact between them to achieve signal transmission. The second transparent conductive portion 31 is partially located within the through-hole HL. Because the orthographic projection of the metal block 5 on the substrate 1 at least partially overlaps with the orthographic projection of the through-hole HL on the substrate 1, the second transparent conductive portion 31 located within the through-hole HL can directly contact the metal block 5. In this case, in addition to improving exposure, the metal block 5 can also serve as a signal transmission device, improving the electrical conduction reliability between the first transparent conductive portion 21 and the second transparent conductive portion 31.

[0070] In some optional embodiments, the orthographic projection of the metal block 5 on the substrate 1 overlaps the orthographic projection of the through hole HL on the substrate 1. This design can increase the contact area between the metal block 5 and the second transparent conductive portion 31, thereby achieving better conductivity between the second transparent conductive portion 31 and the metal block 5, thereby further reducing the risk of dark spots or virtual dark spots in the first display area FA.

[0071] In some embodiments, the functional film layer 4 includes an insulating layer 41 .

[0072] The insulating layer 41 is disposed between the first signal line layer 2 and the second signal line layer 3 to prevent large-area contact between the first transparent conductive portion 21 and the second transparent conductive portion 31, thereby reducing the risk of short circuits within the array substrate. It should be noted that the insulating layer 41 within the first display area FA must be made of a transparent material to improve the transmittance of the first display area FA. The insulating layer 41 within the second display area AA can be made of either a transparent or opaque material, and this is not limited in this embodiment of the present application.

[0073] In some embodiments, see Figure 5 The insulating layer 41 is in contact with the first signal line layer 2 and the second signal line layer 3 on both sides in the thickness direction X.

[0074] In the embodiment of the present application, only an insulating layer 41 is provided between the first signal line layer 2 and the second signal line layer 3. This design can reduce the height of the through hole HL in the thickness direction X while preventing the first transparent conductive portion 21 and the second transparent conductive portion 31 from making contact over a large area. This reduces the risk of fracture of the first transparent conductive portion 21 or the second transparent conductive portion 31 within the through hole HL, thereby improving the electrical conduction reliability of the first transparent conductive portion 21 and the second transparent conductive portion 31.

[0075] In some embodiments, the first transparent conductive portion 21 and the second transparent conductive portion 31 are electrically connected through a plurality of through holes HL.

[0076] The phrase "the first transparent conductive portion 21 and the second transparent conductive portion 31 are electrically connected via a plurality of through-holes HL" in the embodiments of the present application means that the orthographic projections of a single first transparent conductive portion 21 and a single second transparent conductive portion 31 on the substrate 1 at least partially overlap with the plurality of through-holes HL. The provision of the plurality of through-holes HL can improve signal transmission between the first transparent conductive portion 21 and the second transparent conductive portion 31. The specific number of the first transparent conductive portion 21, the second transparent conductive portion 31, and the through-holes HL should be determined based on actual circumstances and is not limited in the embodiments of the present application.

[0077] In some embodiments, see Figure 6 The orthographic projections of the first transparent conductive portion 21 and / or the second transparent conductive portion 31 on the substrate 1 cover the plurality of through holes HL.

[0078] On the basis of the above embodiments, in the embodiments of the present application, at least one of the first transparent conductive portion 21 and the second transparent conductive portion 31 is provided so that the orthographic projection of the substrate 1 covers a plurality of through holes HL, thereby further enhancing the contact reliability between the first transparent conductive portion 21 and the second transparent conductive portion 31 and enhancing the signal transmission capability therebetween.

[0079] Second, see Figure 7An embodiment of the present application provides a display panel, including an array substrate of any of the above-mentioned embodiments and a first electrode layer 6, wherein the first electrode layer 6 is at least partially located on the side of the second signal line layer 3 facing away from the substrate 1, and the first electrode layer 6 includes a plurality of first electrodes 61 for forming a light-emitting unit PX, and the first transparent conductive portion 21 is electrically connected to the plurality of first electrodes 61.

[0080] It should be noted that the display panel provided in the embodiment of the present application has the beneficial effects of the array substrate provided in the embodiment of the present application. For details, please refer to the specific description of the array substrate in the above embodiments, which will not be repeated in this embodiment.

[0081] The first electrode 61 usually serves as the anode of the light-emitting unit PX to drive the internal light-emitting layer to emit light. The first electrode 61 is partially located on the side of the first transparent conductive portion 21 facing away from the substrate 1, wherein there is no other film layer such as the insulating layer 41 between the first electrode 61 and the first transparent conductive portion 21. The first electrode 61 is directly overlapped on the first transparent conductive portion 21 to achieve electrical connection.

[0082] The first transparent conductive portion 21 is electrically connected to the driving circuit in the display panel and is used to transmit the driving signal to the second transparent conductive portion 31. Figure 1 As shown, the display panel further includes a transition area TA located between the first display area FA and the second display area AA, and the first transparent conductive portion 21 is connected to the circuit in the transition area TA.

[0083] The second transparent conductive portion 31 is used to transmit a received drive signal to the corresponding first electrode 61 to drive the light-emitting unit PX to emit light. Optionally, to improve the transmittance of the first display area FA, a single second transparent conductive portion 31 can be connected to multiple first electrodes 61 to reduce the number of second transparent conductive portions 31 in the first display area FA.

[0084] In some embodiments, the orthographic projection of the first electrode 61 on the substrate 1 at least partially overlaps with the orthographic projection of the through hole HL on the substrate 1 . The first electrode 61 includes a main portion 611 located on the side of the functional film layer 4 facing away from the substrate 1 and a conductive reinforcement portion 612 located in the through hole HL.

[0085] The first electrode 61, serving as the anode of the light-emitting unit PX, needs to be electrically connected to the first transparent conductive portion 21 and the second transparent conductive portion 31 to receive a driving signal. As previously mentioned, one of the first transparent conductive portion 21 and the second transparent conductive portion 31 must be partially located within the through-hole HL to achieve contact between the two. However, due to the relatively thin dimensions of the first and second transparent conductive portions 21 and 31, the portion located within the through-hole HL is susceptible to fracture, preventing the driving signal from being transmitted to the first electrode 61, resulting in dark spots or virtual dark spots.

[0086] To address the above-mentioned problem, in an embodiment of the present application, the orthographic projection of the first electrode 61 on the substrate 1 is at least partially overlapped with the orthographic projection of the through hole HL on the substrate 1, so that the conductive reinforcement portion 612 in the first electrode 61 can be located within the through hole HL and contact at least one of the first transparent conductive portion 21 and the second transparent conductive portion 31, thereby ensuring that the driving signal can be transmitted to the first electrode 61 and reducing the risk of dark spots or virtual dark spots appearing in the first display area FA.

[0087] In some embodiments, the orthographic projection of the first electrode 61 on the substrate 1 at least partially overlaps with the orthographic projection of the metal block 5 on the substrate 1 .

[0088] In the embodiment of the present application, the first electrode 61 can shield the metal block 5, thereby reducing the reflection of light by the metal block 5 during use of the display panel and improving the display effect. Optionally, the orthographic projection of the first electrode 61 on the substrate 1 covers the orthographic projection of the metal block 5 on the substrate 1.

[0089] In some embodiments, the orthographic projection of the first electrode 61 on the substrate 1 covers the orthographic projection of the through hole HL on the substrate 1 .

[0090] In the embodiment of the present application, by covering the orthographic projection of the through hole HL on the substrate 1 with the orthographic projection of the first electrode 61 on the substrate 1 , more electrode material can be formed in the through hole HL during the preparation of the first electrode 61 , thereby further improving the electrical conduction reliability.

[0091] Thirdly, please refer to Figure 8 , an embodiment of the present application provides a display device, comprising a display panel according to any of the aforementioned embodiments.

[0092] It should be noted that the display device provided in the embodiment of the present application has the beneficial effects of the display panel provided in the embodiment of the present application. For details, please refer to the specific description of the display panel and the array substrate in the above embodiments, which will not be repeated in this embodiment.

[0093] For the fourth aspect, please refer to Figure 9 An embodiment of the present application provides a method for manufacturing a display panel, wherein the display panel has a first display area and a second display area, and the transmittance of the first display area is greater than that of the second display area. The manufacturing method includes:

[0094] S100: forming a plurality of metal blocks and a first signal line layer located in a first display area on one side of a substrate, wherein the first signal line layer includes a first transparent conductive portion located in the first display area.

[0095] See also Figure 10aIn step S100, the first transparent conductive portion 21 is used to transmit a drive signal to the first display area. Optionally, the display panel also includes a transition region between the first and second display areas, and the first transparent conductive portion 21 is connected to the circuitry within the transition region. The metal block 5 is used to enhance exposure during subsequent fabrication. The metal block 5 can be fabricated in the same layer as the first transparent conductive portion 21 or positioned on the side of the first transparent conductive portion 21 facing the substrate 1.

[0096] S110: forming a functional film layer on a side of the first signal line layer facing away from the substrate, and exposing the functional film layer to form a through hole penetrating along the thickness direction of the substrate, wherein the orthographic projection of the through hole on the substrate at least partially overlaps with the orthographic projection of the metal block on the substrate.

[0097] See also Figure 10b In step S110, the functional film layer 4 may include various film layers of different types to achieve different functional effects. For example, the functional film layer 4 may include a planarization layer, a buffer layer, an insulating layer 41, and the like. Furthermore, during the exposure process to form the through-hole HL within the functional film layer 4, the presence of the metal block 5 partially reflects the exposure light, thereby improving the exposure effect and increasing the aperture of the through-hole HL.

[0098] S120: forming a second signal line layer on a side of the functional film layer facing away from the substrate, wherein the second signal line layer includes a second transparent conductive portion located in the first display area, and one of the first transparent conductive portion and the second transparent conductive portion is electrically connected to the other through a through hole.

[0099] See also Figure 10c In step S120, the formed second transparent conductive portion 31 is electrically connected to the first transparent conductive portion 21 through the through hole HL. Optionally, the first transparent conductive portion 21 and the second transparent conductive portion 31 include indium tin oxide (ITO) material.

[0100] In some embodiments, see Figure 11 and Figure 12 , after step S120, further comprising:

[0101] S130: forming a first electrode layer on a side of the second signal line layer facing away from the substrate, and depositing a portion of electrode material in the first electrode layer in the through hole to form a conductive reinforcement portion.

[0102] See also Figure 12In step S130, part of the electrode material is deposited in the through-hole HL to form the conductive reinforcing portion 612, and part of one of the first transparent conductive portion 21 and the second transparent conductive portion 31 is located in the through-hole HL. Therefore, the conductive reinforcing portion 612 can contact at least one of the first transparent conductive portion 21 and the second transparent conductive portion 31, thereby ensuring that the driving signal can be transmitted to the first electrode 61, reducing the risk of dark spots or virtual dark spots in the first display area.

[0103] Although the embodiments disclosed in this application are as described above, the contents described are merely embodiments adopted to facilitate understanding of this application and are not intended to limit the present invention. Any person skilled in the art to which this application belongs may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application. However, the scope of protection of this application shall still be based on the scope defined by the appended claims.

[0104] The above description is only a specific embodiment of the present application. Those skilled in the art will clearly understand that for the convenience and brevity of description, the replacement of other connection methods described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the scope of protection of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the scope of protection of this application.

Claims

1. An array substrate, characterized in that: The array substrate has a first display area and a second display area, wherein the transmittance of the first display area is greater than the transmittance of the second display area, and the array substrate includes: substrate; a first signal line layer located on one side of the substrate, the first signal line layer comprising a plurality of first transparent conductive portions located in the first display area; a second signal line layer, located on a side of the first signal line layer facing away from the substrate, the second signal line layer comprising a plurality of second transparent conductive portions located in the first display area; a functional film layer located between the first signal line layer and the second signal line layer, the functional film layer comprising a through hole penetrating the functional film layer along the thickness direction of the substrate, wherein one of the first transparent conductive portion and the second transparent conductive portion is electrically connected to the other through the through hole; A plurality of metal blocks are provided on a side of the functional film layer facing the substrate, and an orthographic projection of at least one of the metal blocks on the substrate at least partially overlaps with an orthographic projection of the through hole on the substrate.

2. The array substrate according to claim 1, wherein: The metal block is located on a side of the first signal line layer facing the substrate.

3. The array substrate according to claim 2, wherein: The array substrate further includes a metal conductive portion located in the second display area, and the metal block is provided in the same layer as the metal conductive portion.

4. The array substrate according to claim 1, wherein: The metal block is located in the first signal line layer, and a portion of the second transparent conductive portion is located in the through hole and is electrically connected to the first transparent conductive portion through the metal block.

5. The array substrate according to claim 1, wherein: The functional film layer includes an insulating layer.

6. The array substrate according to claim 5, wherein: Both sides of the insulating layer in the thickness direction are in contact with the first signal line layer and the second signal line layer, respectively.

7. The array substrate according to claim 1, wherein: The first transparent conductive portion and the second transparent conductive portion are electrically connected through the plurality of through holes.

8. The array substrate according to claim 7, wherein: The orthographic projection of the first transparent conductive portion and / or the second transparent conductive portion on the substrate covers the plurality of through holes.

9. A display panel, characterized in that: It includes an array substrate as described in any one of claims 1 to 5 and a first electrode layer, the first electrode layer is at least partially located on the side of the second signal line layer away from the substrate, the first electrode layer includes a plurality of first electrodes for forming a light-emitting unit, and the second transparent conductive portion is electrically connected to the first electrode.

10. The display panel according to claim 9, wherein: The orthographic projection of the first electrode on the substrate at least partially overlaps with the orthographic projection of the through hole on the substrate. The first electrode includes a main body located on a side of the functional film layer facing away from the substrate and a conductive reinforcement portion located in the through hole.

11. The display panel according to claim 10, wherein: An orthographic projection of the first electrode on the substrate at least partially overlaps with an orthographic projection of the metal block on the substrate.

12. The display panel according to claim 10, wherein: The orthographic projection of the first electrode on the substrate covers the orthographic projection of the through hole on the substrate.

13. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 9 to 12.

14. A method for preparing a display panel, characterized in that: The display panel has a first display area and a second display area, the transmittance of the first display area is greater than that of the second display area, and the manufacturing method includes: forming a plurality of metal blocks and a first signal line layer located in the first display area on one side of the substrate, wherein the first signal line layer includes a first transparent conductive portion located in the first display area; forming a functional film layer on a side of the first signal line layer facing away from the substrate, and exposing the functional film layer to form a through hole penetrating along the thickness direction of the substrate, wherein the orthographic projection of the through hole on the substrate at least partially overlaps with the orthographic projection of the metal block on the substrate; A second signal line layer is formed on the side of the functional film layer facing away from the substrate. The second signal line layer includes a second transparent conductive portion located in the first display area. One of the first transparent conductive portion and the second transparent conductive portion is electrically connected to the other through the through hole.

15. The method for manufacturing a display panel according to claim 14, wherein: After forming the second signal line layer on the side of the functional film layer facing away from the substrate, the method further includes: A first electrode layer is formed on a side of the second signal line layer facing away from the substrate, and a portion of electrode material in the first electrode layer is deposited in the through hole to form a conductive reinforcement portion.

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