Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate; the transparent conducting layer is located on one side of the substrate, and the transparent conducting layer comprises a first transparent wire and a second transparent wire; the first transparent wires are located in the main display area, and the second transparent wires are located in the light-transmitting display area. The first metal layer is located on the side, away from the substrate, of the first transparent wire, the first metal layer comprises a first metal wire, and the first metal wire is located in the main display area and electrically connected with the first transparent wire; the sub-pixels are located on the side, away from the substrate, of the first metal layer and located in the main display area and the light-transmitting display area; wherein the sub-pixels located in the main display area are electrically connected with the first metal wires, and the sub-pixels located in the light-transmitting display area are electrically connected with the second transparent wires. According to the display panel, the transparent conducting layer is moved downwards, so that the over-etching condition of the transparent conducting layer is improved, and the problem of pixel dark spots caused by disconnection of the transparent conducting layer in the light-transmitting display area is solved.

Description

Technical Field

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

[0002] OLED (Organic Light-Emitting Diode) is an active light-emitting unit with a sandwich structure consisting of multiple organic layers and electrodes on both sides. Currently, display screens based on AMOLED (Active-matrix organic light-emitting diode) have been commercialized in the fields of smartphones, watches, and laptops.

[0003] However, existing display screens are prone to dark pixels, and their performance needs to be improved. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a display panel and a preparation method thereof, as well as a display device that can help improve pixel dark spots and enhance performance.

[0005] Based on the above purpose, the present application provides a display panel, which includes a main display area and a light-transmitting display area, wherein the main display area at least partially surrounds the light-transmitting display area, and the display panel further includes:

[0006] substrate;

[0007] A transparent conductive layer, located on one side of the substrate, the transparent conductive layer comprising a first transparent conductive wire and a second transparent conductive wire; the first transparent conductive wire is located in the main display area, and the second transparent conductive wire is located in the light-transmitting display area;

[0008] A first metal layer, located on a side of the first transparent conductive line away from the substrate, the first metal layer comprising a first metal wiring, the first metal wiring being located in the main display area and electrically connected to the first transparent conductive line;

[0009] The sub-pixel is located on a side of the first metal layer away from the substrate and is located in the main display area and the light-transmitting display area; wherein the sub-pixel located in the main display area is electrically connected to the first metal wiring, and the sub-pixel located in the light-transmitting display area is electrically connected to the second transparent wire.

[0010] In one embodiment, a side of the first metal wiring close to the substrate is in contact with and connected to a side of the first transparent wire facing away from the substrate, and the first transparent wire is within the orthographic projection range of the first metal wiring on the substrate;

[0011] Preferably, an orthographic projection of the first transparent conductive line on the substrate overlaps with an orthographic projection of the first metal wiring on the substrate.

[0012] In one embodiment, the display panel further includes:

[0013] An isolation structure, located on one side of the substrate, the isolation structure encloses an isolation opening and a light-transmitting opening;

[0014] The isolation opening is located in the main display area and the light-transmitting display area, and at least part of the sub-pixels are located in the isolation opening;

[0015] The light-transmitting opening is located in the light-transmitting display area, and an orthographic projection of the light-transmitting opening on the substrate overlaps with an orthographic projection of the second transparent wire on the substrate.

[0016] In one embodiment, the display panel further comprises an insulating layer located on a side of the isolation structure facing the substrate, the insulating layer covers the first metal layer, the insulating layer located in the main display area is provided with at least one first connecting via hole, and the insulating layer located in the light-transmitting display area is provided with at least one second connecting via hole;

[0017] The sub-pixels in the main display area are connected to the first metal wiring through the first connecting vias, and the sub-pixels in the light-transmitting display area are electrically connected to the second transparent conductive wires through the second connecting vias;

[0018] Preferably, the orthographic projections of the first connecting via and the second connecting via on the substrate are located within the orthographic projection range of the isolation structure on the substrate.

[0019] In one embodiment, the display panel further includes a second metal layer located on a side of the transparent conductive layer close to the substrate, the insulating layer includes a first insulating layer and a second insulating layer sequentially arranged along a side away from the substrate, the transparent conductive layer is located on a side of the first insulating layer away from the substrate, and the first insulating layer is located on a side of the second metal layer away from the substrate;

[0020] Preferably, a third connecting via is provided on the first insulating layer, and the first transparent conductive wire is electrically connected to at least part of the fifth metal trace in the second metal layer through the third connecting via;

[0021] Preferably, an orthographic projection of the first connecting via hole on the substrate and an orthographic projection of the third connecting via hole on the substrate do not overlap with each other.

[0022] In one embodiment, the sub-pixel includes a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked on the substrate, the isolation opening exposes a portion of the first electrode, and the light-emitting functional layer and the second electrode are located in the isolation opening;

[0023] The isolation structure comprises a support portion and a crown portion, wherein the crown portion is located on a side of the support portion away from the substrate, and an orthographic projection of an end of the support portion close to the crown portion on the substrate is located within an orthographic projection of the crown portion on the substrate; the support portion is electrically connected to the second electrode;

[0024] The first electrode located in the main display area is electrically connected to the first metal wiring and the first transparent wire, and the plurality of first electrodes located in the light-transmitting display area are electrically connected to each other through the second transparent wire.

[0025] In one embodiment, the transparent conductive layer located in the light-transmitting display area further includes a third transparent wire, and the third transparent wire is electrically connected to the support portion of the adjacent isolation structure;

[0026] The first metal layer further includes a second metal trace and a third metal trace, the second metal trace and the third metal trace are located in the light-transmitting display area, the second metal trace is electrically connected to the second transparent wire, the third metal trace is located in the light-transmitting display area, and the third metal trace is electrically connected to the third transparent wire;

[0027] Preferably, the second metal wiring is connected between the second transparent wire and the first electrode of the sub-pixel;

[0028] Preferably, the third metal wiring is connected between the third transparent conductive line and the supporting portion of the isolation structure.

[0029] In one embodiment, the orthographic projection of the second metal trace on the substrate is located outside the orthographic projection of the light-transmitting opening on the substrate;

[0030] The orthographic projection of the third metal trace on the substrate is located outside the orthographic projection of the light-transmitting opening on the substrate.

[0031] In one embodiment, the display panel further includes:

[0032] A pixel definition layer is located on a side of the insulating layer away from the substrate, the isolation structure is located on a side of the pixel definition layer away from the insulating layer, the pixel definition layer defines a pixel opening corresponding to the isolation opening, and the first electrode is at least partially exposed to the pixel opening;

[0033] The orthographic projection of the isolation opening on the substrate is located within the orthographic projection range of the pixel opening on the substrate.

[0034] In one embodiment, the display panel further includes:

[0035] A pixel definition layer is located on a side of the insulating layer away from the substrate, and the isolation structure located in the light-transmitting display area is electrically connected to the third transparent wire through the sleeve holes of the pixel definition layer and the insulating layer;

[0036] Preferably, the insulating layer includes a first insulating layer and a second insulating layer sequentially arranged along a side away from the substrate, the third transparent wire is located on a side of the first insulating layer away from the substrate, and the hole is located in the pixel definition layer and the first insulating layer.

[0037] In one embodiment, the first metal layer includes a first conductive layer, a second conductive layer and a third conductive layer sequentially arranged along a side away from the substrate;

[0038] The first metal trace comprises a first conductive portion located at the first conductive layer, a second conductive portion located at the second conductive layer, and a third conductive portion located at the third conductive layer;

[0039] Preferably, the material of the first conductive layer includes titanium, the material of the second conductive layer includes aluminum, and the material of the third conductive layer includes titanium.

[0040] Based on the same inventive concept, the present application also provides a display panel, which includes:

[0041] substrate,

[0042] A transparent conductive layer, located on one side of the substrate, wherein the transparent conductive layer comprises a first transparent conductive wire;

[0043] A first metal layer, located on a side of the transparent conductive layer away from the substrate, the first metal layer comprising a first metal trace, and the first metal trace is electrically connected to the first transparent conductive wire;

[0044] An isolation structure is disposed on one side of the substrate, and the isolation structure encloses an isolation opening;

[0045] A sub-pixel is at least partially disposed in the isolation opening, and at least a portion of the sub-pixel is electrically connected to the first metal wiring.

[0046] In one embodiment, the display panel includes a display area and a light-transmitting display area, the first metal wiring is located in the display area, and the transparent conductive layer further includes a second transparent wire located in the light-transmitting display area;

[0047] The sub-pixel located in the light-transmitting display area is connected to the second transparent conductive wire;

[0048] Preferably, in the light-transmitting display area, at least two sub-pixels having the same luminous color are connected via the second transparent wire.

[0049] In one embodiment, the first metal layer includes a first conductive layer, a second conductive layer and a third conductive layer sequentially arranged along a side away from the substrate;

[0050] The first metal trace comprises a first conductive portion located at the first conductive layer, a second conductive portion located at the second conductive layer, and a third conductive portion located at the third conductive layer;

[0051] Preferably, the material of the first conductive layer includes titanium, the material of the second conductive layer includes aluminum, and the material of the third conductive layer includes titanium.

[0052] Based on the same inventive concept, the present application also provides a method for preparing a display panel, wherein the display panel comprises a main display area and a light-transmitting display area, wherein the main display area at least partially surrounds the light-transmitting display area, and the preparation method comprises:

[0053] A transparent conductive layer is formed on one side of the substrate, and a first metal layer is formed on the transparent conductive layer;

[0054] Patterning the first metal layer to form a first metal wiring located in the main display area and a fourth metal wiring located in the light-transmitting display area;

[0055] The fourth metal wiring is removed, and a first transparent wire and a second transparent wire are formed in the transparent conductive layer; wherein the first transparent wire is located in the main display area and on a side of the first metal wiring close to the substrate; and the second transparent wire is located in the light-transmitting display area;

[0056] A plurality of sub-pixels are formed on a side of the first metal wiring away from the substrate, the sub-pixels in the main display area are electrically connected to the first metal wiring, and the sub-pixels in the light-transmitting display area are electrically connected to the second transparent conductive wire.

[0057] In one embodiment, patterning the first metal layer to form the first metal wiring located in the main display area and the fourth metal wiring located in the light-transmitting display area includes:

[0058] Coating a photoresist on the first metal layer, exposing and developing the photoresist to form a first metal line pattern located in the main display area and a second transparent wire pattern located in the light-transmitting display area, and removing the photoresist covered by the second transparent wire pattern to form a first metal trace and a fourth metal trace on the first metal layer;

[0059] Preferably, the first metal layer comprises a first conductive layer, a second conductive layer and a third conductive layer sequentially stacked on the transparent conductive layer;

[0060] The method of removing the fourth metal wiring and forming a first transparent wire and a second transparent wire in the transparent conductive layer includes:

[0061] Removing the photoresist on the fourth metal trace;

[0062] Removing the third conductive layer and a portion of the second conductive layer in the fourth metal wiring by using a dry etching process;

[0063] Using a wet etching process to remove the remaining portion of the second conductive layer in the fourth metal wiring, and etching the transparent conductive layer to form the first transparent conductive wire and the second transparent conductive wire;

[0064] The first conductive layer in the fourth metal wiring is removed by a dry etching process, and the photoresist on the first metal wiring is removed at the same time.

[0065] In one embodiment, after removing the fourth metal wiring and forming the first transparent wire and the second transparent wire in the transparent conductive layer, the method further includes:

[0066] forming an insulating layer on one side of the substrate, so that the insulating layer at least covers the first metal wiring and the second transparent wire;

[0067] At least one first connection via hole located in the main display area and at least one second connection via hole located in the light-transmitting display area are formed on the insulating layer; wherein the sub-pixel in the main display area is connected to the first metal wiring through the first connection via hole, and the sub-pixel in the light-transmitting display area is electrically connected to the second transparent wire through the second connection via hole;

[0068] Preferably, the display panel further comprises a second metal layer located on a side of the transparent conductive layer close to the substrate, the insulating layer comprises a first insulating layer and a second insulating layer sequentially arranged along a side away from the substrate, the transparent conductive layer is located on a side of the first insulating layer away from the substrate, and the second insulating layer is located on a side of the second metal layer away from the substrate;

[0069] Preferably, a third connecting via is provided on the first insulating layer, and the first transparent conductive wire is electrically connected to at least part of the fifth metal trace in the second metal layer through the third connecting via;

[0070] Preferably, an orthographic projection of the first connecting via hole on the substrate and an orthographic projection of the third connecting via hole on the substrate do not overlap with each other.

[0071] In one embodiment, after removing the fourth metal wiring and forming the first transparent wire and the second transparent wire in the transparent conductive layer, the method further includes:

[0072] An isolation structure is manufactured on one side of the substrate, so that the isolation structure encloses an isolation opening and a light-transmitting opening; wherein the isolation opening is located in the main display area and the light-transmitting display area, and at least part of the sub-pixels are located in the isolation opening; the light-transmitting opening is located in the light-transmitting display area, and the orthographic projection of the light-transmitting opening on the substrate overlaps with the orthographic projection of the second transparent wire on the substrate.

[0073] Preferably, between forming the insulating layer and manufacturing the isolation structure, the method further comprises:

[0074] A pixel definition layer is formed on a side of the insulating layer away from the substrate, the isolation structure is located on a side of the pixel definition layer away from the insulating layer, the pixel definition layer is defined with a pixel opening corresponding to the isolation opening, and the first electrode of the sub-pixel is at least partially exposed to the pixel opening; the orthographic projection of the isolation opening on the substrate is located within the orthographic projection range of the pixel opening on the substrate.

[0075] Based on the same inventive concept, the present application also provides a method for preparing a display panel, wherein the display panel comprises a main display area and a light-transmitting display area, wherein the main display area at least partially surrounds the light-transmitting display area, and the preparation method comprises:

[0076] A passivation layer is formed on one side of the substrate, and a transparent conductive layer is formed on the passivation layer;

[0077] forming a first metal layer on the transparent conductive layer;

[0078] The first metal layer and the transparent conductive layer are patterned to form a first metal wiring located in the main display area and a fourth metal wiring located in the light-transmitting display area, and a first transparent wire and a second transparent wire are formed in the transparent conductive layer; wherein the first transparent wire is located in the main display area and is located on a side of the first metal wiring close to the substrate; and the second transparent wire is located in the light-transmitting display area;

[0079] removing the fourth metal trace;

[0080] A plurality of sub-pixels are formed on a side of the first metal wiring away from the substrate, the sub-pixels in the main display area are electrically connected to the first metal wiring, and the sub-pixels in the light-transmitting display area are electrically connected to the second transparent conductive wire.

[0081] Based on the same inventive concept, the present application also provides a display device, which includes the above-mentioned display panel.

[0082] Compared with the prior art, the display panel provided by the present application connects multiple sub-pixels in the light-transmitting display area together through a second transparent wire for driving, and forms a transparent conductive path between the sub-pixels, which can drive the sub-pixels to emit light, and can also maintain the high transmittance of the light-transmitting display area, which can not only maintain the conductivity requirements in the light-transmitting display area, but also optimize the transmittance, and meet the requirements of the under-screen camera for high transmittance. In addition, the first transparent wire and the first metal wiring form a double-layer conductive structure for signal transmission, which can effectively reduce resistance and voltage drop, improve the uniformity of current distribution, and thus enhance the performance and reliability of the circuit. At the same time, by moving the transparent conductive layer down to the side of the first metal layer close to the substrate, the over-engraving of the transparent conductive layer is improved, and the problem of dark spots in pixels caused by the break of the transparent conductive layer in the light-transmitting display area is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0083] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0084] Figure 1 is a schematic diagram of a related display panel;

[0085] Figure 2 is a schematic diagram of a hierarchical structure of a related display panel;

[0086] Figure 3 A schematic diagram of a display panel provided in an embodiment of the present application;

[0087] Figure 4 A schematic diagram of the hierarchical structure of a main display area of ​​a display panel provided in an embodiment of the present application;

[0088] Figure 5 A partial enlarged view of the hierarchical structure of the main display area of ​​the display panel provided in one embodiment of the present application;

[0089] Figure 6A schematic diagram of the hierarchical structure of a light-transmitting display area of ​​a display panel provided in one embodiment of the present application;

[0090] Figure 7 A schematic diagram of the hierarchical structure of a light-transmitting display area of ​​a display panel provided in another embodiment of the present application;

[0091] Figure 8 A schematic diagram of the hierarchical structure of a light-transmitting display area of ​​a display panel provided in another embodiment of the present application;

[0092] Fig. 9 A schematic diagram of the hierarchical structure of a light-transmitting display area of ​​a display panel provided in another embodiment of the present application;

[0093] Fig.10 A flow chart of a method for preparing a display panel provided in another embodiment of the present application;

[0094] Fig.11 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0095] Fig.12 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0096] Fig.13 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0097] Fig.14 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0098] Fig.15 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0099] Fig.16 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0100] Fig.17 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0101] Fig.18 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0102] Fig.19 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0103] Fig. 20 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0104] Fig.21 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0105] Fig. 22 A flow chart of a method for preparing a display panel provided in another embodiment of the present application;

[0106] Fig.23 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0107] Fig.24 A schematic diagram of a hierarchical structure in a display panel manufacturing process provided by another embodiment of the present application;

[0108] Fig.25 A schematic diagram of the hierarchical structure in the display panel preparation process provided by another embodiment of the present application. Marking description: 100, display panel; 101, main display area; 102, light-transmitting display area; 11, substrate; 12, insulating layer; 121, first insulating layer; 122, second insulating layer; 1201, first connecting via; 1202, second connecting via; 1211, third connecting via; 120, sleeve hole; 13, pixel definition layer; 131, pixel opening; 14, isolation structure; 141, isolation opening; 142, light-transmitting opening; 143, support portion; 144, crown portion; 15, transparent conductive layer; 151, first transparent conductive wire ; 152, second transparent wire; 153, third transparent wire; 16, sub-pixel; 161, first electrode; 162, light-emitting functional layer; 163, second electrode; 17, first metal layer; 1701, first conductive layer; 1702, second conductive layer; 1703, third conductive layer; 171, first metal routing; 172, second metal routing; 173, third metal routing; 174, fourth metal routing; 18, first packaging layer; 19, second metal layer; 191, fifth metal routing; 20, photoresist; 30, passivation layer. DETAILED DESCRIPTION

[0109] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0110] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0111] UDC (Under Display Camera) technology allows the photosensitive components to be hidden under the display panel, thereby realizing a full-screen design and providing a more immersive visual experience. For example, on display devices such as mobile phones and tablets, it is necessary to integrate photosensitive components such as a front camera, an infrared sensor, and a proximity light sensor on one side of the display panel. In some cases, a translucent display area can be set on the display panel, and the photosensitive component can be set on the back of the translucent display area. While ensuring the normal operation of the photosensitive component, a full-screen display of the display device can be achieved.

[0112] Reference Figure 1 and Figure 2 , is a related display panel 100, wherein the display panel 100 includes a main display area 101 and a light-transmitting display area 102, wherein the main display area 101 is arranged around the light-transmitting display area 102, and the light-transmitting display area 102 is a UDC area. The display panel 100 also includes a substrate 11, an insulating layer 12, a pixel definition layer 13, an isolation structure 14 and a transparent conductive layer 15, wherein the insulating layer 12 and the pixel definition layer 13 are sequentially stacked on the substrate 11, and the isolation structure 14 is located on the side of the pixel definition layer 13 away from the substrate 11, and a plurality of isolation openings 141 and a plurality of light-transmitting openings 142 can be formed. The plurality of sub-pixels located in the light-transmitting display area 102 are connected together by a transparent conductive layer 15, wherein the transparent conductive layer 15 is located between the insulating layer 12 and the pixel definition layer 13.

[0113] In order to improve the transmittance, the method of reducing the pixel light-emitting area is usually adopted in the light-transmitting display area 102, and multiple sub-pixels are connected together through the transparent conductive layer 15 for driving. After long-term research, the inventor found that the cathode coverage under the isolation structure 14 is relatively thin, resulting in the cathode being difficult to effectively block the excessive etching of the chemical vapor deposition (CVD) layer during the etching process, thereby causing etching damage to the pixel definition layer 13 at the boundary of the isolation structure 14 during etching. Since the transparent conductive layer 15 is arranged below the pixel definition layer 13 and the anode layer of the sub-pixel, the etching damage may further affect the transparent wires in the transparent conductive layer 15 in the light-transmitting display area 102, causing the transparent wires to break, and ultimately causing the problem of dark spots in the pixels of the light-transmitting display area 102.

[0114] Based on this, the present application provides a display panel and a method for manufacturing the same, and a display device to solve the above technical problems, as detailed in the following embodiments.

[0115] Reference Figures 3 to 6 As shown, an embodiment of the present application provides a display panel 100, which includes a main display area 101 and a light-transmitting display area 102, wherein the main display area 101 at least partially surrounds the light-transmitting display area 102. At the same time, the display panel 100 also includes a substrate 11 and a transparent conductive layer 15, a first metal layer 17 and a sub-pixel 16 that are sequentially away from the substrate 11, wherein the transparent conductive layer 15 is located on one side of the substrate 11, and the transparent conductive layer 15 includes a first transparent conductive wire 151 and a second transparent conductive wire 152, wherein the first transparent conductive wire 151 is located on the main display area 101, and the second transparent conductive wire 152 is located on the light-transmitting display area 102. The first metal layer 17 is located on the side of the first transparent conductive wire 151 away from the substrate 11, and the first metal layer 17 includes a first metal wiring 171, which is located in the main display area 101, and the first metal wiring 171 is electrically connected to the first transparent conductive wire 151. The sub-pixel 16 is located on a side of the first metal layer 17 away from the substrate 11, and the sub-pixel 16 is located in the main display area 101 and the light-transmitting display area 102, wherein the sub-pixel 16 located in the main display area 101 is electrically connected to the first metal wiring 171, and the sub-pixels 16 located in the light-transmitting display area 102 are electrically connected through the second transparent wire 152. Preferably, in the light-transmitting display area 102, at least two sub-pixels 16 with the same luminous color are connected through the second transparent wire 152.

[0116] The display panel 100 provided in the present application connects a plurality of sub-pixels 16 in the light-transmitting display area 102 together for driving through the second transparent wire 152, and forms a transparent conductive path between the sub-pixels 16, which can drive the sub-pixels 16 to emit light, and can also maintain the high transmittance of the light-transmitting display area 102, which can not only maintain the conductive requirements in the light-transmitting display area 102, but also optimize the transmittance, and meet the requirements of the under-screen camera for high transmittance. In addition, the first transparent wire 151 and the first metal wiring 171 form a double-layer conductive structure for signal transmission, which can effectively reduce resistance and voltage drop, improve the uniformity of current distribution, and thus enhance the performance and reliability of the circuit. At the same time, by arranging the transparent conductive layer 15 on the side of the first metal layer 17 close to the substrate 11, the transparent conductive layer 15 is relatively moved downward, which can improve the over-engraving of the transparent conductive layer 15, and solve the problem of pixel dark spots caused by the disconnection of the transparent conductive layer 15 in the light-transmitting display area 102.

[0117] Specifically, the material of the transparent conductive layer 15 may be indium tin oxide (ITO), which is a material with good electrical conductivity and light transmittance.

[0118] Specifically, the light-transmitting display area 102 may be a display area inside the main display area 101, or may be arranged adjacent to the main display area 101, and the light transmittance of the light-transmitting display area 102 is greater than the light transmittance of the main display area 101. It should be noted that each sub-pixel 16 corresponds to a light-emitting unit, and the arrangement of the sub-pixels 16 may be an RGB arrangement, specifically, the sub-pixels may include a G sub-pixel capable of emitting green light, an R sub-pixel capable of emitting red light, and a B sub-pixel capable of emitting blue light.

[0119] Reference Figure 4 , Figure 5 As shown, in some embodiments, a side of the first metal trace 171 close to the substrate 11 is in contact and connected with a side of the first transparent wire 151 facing away from the substrate 11 , and the first transparent wire 151 is within the orthographic projection range of the first metal trace 171 on the substrate 11 .

[0120] Preferably, the orthographic projection of the first transparent conductive line 151 on the substrate 11 overlaps with the orthographic projection of the first metal trace 171 on the substrate 11 .

[0121] The first transparent conductive line 151 and the first metal wiring 171 are located opposite to each other and in close contact, which further ensures the reliability of the electrical connection.

[0122] Reference Figures 4 to 6As shown, in some embodiments, the display panel 100 also includes an isolation structure 14, which is located on one side of the substrate 11. The isolation structure 14 encloses an isolation opening 141 and a light-transmitting opening 142. The isolation opening 141 is located in the main display area 101 and the light-transmitting display area 102. At least part of the sub-pixels 16 are located in the isolation opening 141, and the light-transmitting opening 142 is located in the light-transmitting display area 102. The orthographic projection of the light-transmitting opening 142 on the substrate 11 overlaps with the orthographic projection of the second transparent wire 152 on the substrate 11.

[0123] Among them, a plurality of isolation openings 141 and a plurality of light-transmitting openings 142 are defined by the isolation structure 14, the light-transmitting openings 142 are located in the light-transmitting display area 102, the isolation openings 141 and the light-transmitting openings 142 are spaced apart from each other, and the second transparent wire 152 corresponds to the position of the light-transmitting opening 142, which can improve the transmittance of the light-transmitting display area 102, and can realize transparent display or under-screen recognition functions such as fingerprint recognition, under-screen camera, etc.

[0124] Reference Figures 4 to 6 As shown, in some embodiments, the display panel 100 further includes an insulating layer 12 located on the side of the isolation structure 14 facing the substrate 11, the insulating layer 12 covers the first metal layer 17, the insulating layer 12 located in the main display area 101 is provided with at least one first connection via 1201, and the insulating layer 12 located in the light-transmitting display area 102 is provided with at least one second connection via 1202; wherein, the sub-pixel 16 of the main display area 101 is connected to the first metal wiring 171 through the first connection via 1201, and the sub-pixel 16 of the light-transmitting display area 102 is electrically connected to the second transparent wire 152 through the second connection via 1202. Specifically, the insulating layer 12 at least covers the first metal wiring 171 and the second transparent wire 152.

[0125] Preferably, the orthographic projections of the first connection via 1201 and the second connection via 1202 on the substrate 11 are located within the orthographic projection range of the isolation structure 14 on the substrate 11 .

[0126] Among them, in the main display area 101, the sub-pixel 16 is connected to the first metal wiring 171 through a via. In the light-transmitting display area 102, the sub-pixel 16 is connected to the second transparent wire 152 through a via, and the position of each via connection structure corresponds to the isolation structure 14, so that the first connection via 1201 and the second connection via 1202 are located outside the orthographic projection range of the isolation opening 141 and the light-transmitting opening 142 on the substrate 11, while realizing cross-layer connection, reducing the impact on the luminous performance of the sub-pixel 16 in the isolation opening 141 and the light-transmitting performance of the light-transmitting opening 142.

[0127] Reference Figure 4 , Figure 5As shown, in some embodiments, the display panel 100 also includes a second metal layer 19 located on the side of the transparent conductive layer 15 close to the substrate 11, the insulating layer 12 includes a first insulating layer 121 and a second insulating layer 122 arranged in sequence along a side away from the substrate 11, the transparent conductive layer 15 is located on the side of the first insulating layer 121 away from the substrate 11, and the first insulating layer 121 is located on the side of the second metal layer 19 away from the substrate 11.

[0128] Preferably, a third connection via 1211 is provided on the first insulating layer 121 , and the first transparent conductive line 151 is electrically connected to at least a portion of the fifth metal trace 191 in the second metal layer 19 through the third connection via 1211 .

[0129] Preferably, the orthographic projection of the first connection via 1201 on the substrate 11 does not overlap with the orthographic projection of the third connection via 1211 on the substrate 11. The first connection via 1201 and the third connection via 1211 are staggered to prevent the via structure from affecting the flatness of the anode in the sub-pixel 16.

[0130] Reference Figure 5 As shown, in some embodiments, the sub-pixel 16 includes a first electrode 161, a light-emitting functional layer 162, and a second electrode 163 stacked in sequence on the substrate 11, the isolation opening 141 exposes a portion of the first electrode 161, and the light-emitting functional layer 162 and the second electrode 163 are located in the isolation opening 141.

[0131] The isolation structure 14 includes a support portion 143 and a crown portion 144. The crown portion 144 is located on a side of the support portion 143 away from the substrate 11. The orthographic projection of one end of the support portion 143 close to the crown portion 144 on the substrate 11 is located within the orthographic projection of the crown portion 144 on the substrate 11. The support portion 143 is electrically connected to the second electrode 163.

[0132] The first electrode 161 in the main display area 101 is electrically connected to the first metal wiring 171 and the first transparent wire 151, and the first electrodes 161 of the plurality of sub-pixels 16 in the light-transmitting display area 102 are electrically connected via the second transparent wire 152. In a preferred embodiment of the present application, the first electrode 161 is an anode and the second electrode 163 is a cathode.

[0133] Specifically, no driving circuit is provided in the light-transmitting display area 102, and the driving circuit of the sub-pixel 16 in the light-transmitting display area 102 can be provided in the main display area 101, and the output end of the driving circuit in the main display area 101 can be electrically connected to the first electrode 161 through the first metal wiring 171 and the first transparent wire 151. At the same time, on the cathode or anode of the pixel array, the transparent conductive layer 15 can serve as a bridge connecting multiple sub-pixels to ensure that the current is evenly distributed to each pixel, thereby improving the uniformity and efficiency of the electrical connection of the entire display area.

[0134] In other embodiments, the first electrode 161 may also be a cathode, and the second electrode 163 may also be an anode.

[0135] Specifically, the light-emitting functional layer 162 may include one or more of an electron injection layer, an electron transport layer, a hole blocking layer, an electron blocking layer, a hole transport layer, and a hole injection layer. The light-emitting functional layer 162 and the second electrode 163 may be prepared using a common mask. Compared with the preparation method using a high-precision metal mask, there is no need to align the substrate and the mask, which can improve the production efficiency.

[0136] Reference Figures 7 to 9 As shown, in some embodiments, the transparent conductive layer 15 further includes a third transparent wire 153, the third transparent wire 153 is located in the light-transmitting display area 102, and the third transparent wire 153 is electrically connected to the support portion 143 of the adjacent isolation structure 14. In other words, the support portions 143 of the adjacent isolation structures 14 in the light-transmitting display area 102 can be electrically connected through the third transparent wire 153. The first metal layer 17 further includes a second metal trace 172 and a third metal trace 173, the second metal trace 172 and the third metal trace 173 are located in the light-transmitting display area 102, the second metal trace 172 is electrically connected to the second transparent wire 152, and the third metal trace 173 is electrically connected to the third transparent wire 153.

[0137] Preferably, the second metal wiring 172 is connected between the second transparent conductive line 152 and the first electrode 161 of the sub-pixel 16 .

[0138] Preferably, the third metal wiring 173 is connected between the third transparent conductive line 153 and the supporting portion 143 of the isolation structure 14 .

[0139] Among them, the double-layer conductive structure of the metal wiring superimposed on the transparent wire can reduce the wiring resistance, because the resistance of the transparent wire is relatively large, and the first metal layer 17 is usually made of a metal material with a lower resistivity, such as aluminum or copper, and can share the current with the transparent conductive layer 15, thereby reducing resistance loss and voltage drop, which not only improves the conductivity of the circuit, enhances the signal transmission efficiency, but also maintains the reliability of the circuit. In addition, the second metal wiring 172 is located in the area where the second transparent wire 152 overlaps with the first electrode 161, and the third metal wiring 173 is located in the area where the third transparent wire 153 overlaps with the support portion 143, so as to avoid the metal wiring affecting the light transmittance, and optimize the display effect while ensuring the circuit performance.

[0140] Reference Figure 7 , Figure 8As shown, in one embodiment, the orthographic projection of the second metal wiring 172 on the substrate 11 is located outside the orthographic projection of the light-transmitting opening 142 on the substrate 11; the orthographic projection of the third metal wiring 173 on the substrate 11 is located outside the orthographic projection of the light-transmitting opening 142 on the substrate 11. In the area where light transmission is required, such as the position corresponding to the light-transmitting opening 142, no metal wiring is provided, but a single-layer transparent wire is used, which can meet the electrical conductivity requirements of the circuit and maintain high light transmittance.

[0141] Reference Figures 4 to 9 As shown, in one embodiment, the display panel 100 further includes a pixel definition layer 13, the pixel definition layer 13 is located on the side of the insulating layer 12 away from the substrate 11, the isolation structure 14 is located on the side of the pixel definition layer 13 away from the insulating layer 12, the pixel definition layer 13 defines a pixel opening 131 corresponding to the isolation opening 141, and the first electrode 161 is at least partially exposed to the pixel opening 131. The orthographic projection of the isolation opening 141 on the substrate 11 is located within the orthographic projection range of the pixel opening 131 on the substrate 11.

[0142] Reference Fig. 9 As shown, in one embodiment, the display panel 100 also includes a pixel definition layer 13, the pixel definition layer 13 is located on the side of the insulating layer 12 away from the substrate 11, the isolation structure 14 is located on the side of the pixel definition layer 13 away from the insulating layer 12, and the isolation structure 14 located in the light-transmitting display area 102 is electrically connected to the third transparent wire 153 through the sleeve hole 120 of the pixel definition layer 13 and the insulating layer 12.

[0143] Preferably, the insulating layer 12 includes a first insulating layer 121 and a second insulating layer 122 sequentially arranged along a side away from the substrate 11 , the third transparent wire 153 is located on a side of the first insulating layer 121 away from the substrate 11 , and the sleeve hole 120 is located in the pixel definition layer 13 and the second insulating layer 122 .

[0144] Among them, while the support portion 143 of the isolation structure 14 is overlapped with the second electrode 163 of the sub-pixel 16, it is also overlapped with the third transparent wire 153 in the transparent conductive layer 15 through the sleeve hole 120, forming an effective electrical connection between different layers, ensuring that the second electrode 163 of each sub-pixel can receive a consistent reference potential, thereby ensuring uniform pixel light emission and stability of display performance.

[0145] Reference Figure 4 As shown, in one embodiment, the display panel 100 further includes a first encapsulation layer 18 , and the first encapsulation layer 18 covers the light emitting unit and a portion of the isolation structure 14 , so as to protect the light emitting unit.

[0146] Reference Fig.11 , Fig.12As shown, in one embodiment, the first metal layer 17 includes a first conductive layer 1701, a second conductive layer 1702, and a third conductive layer 1703 sequentially arranged along a side away from the substrate 11. The first metal trace 171 includes a first conductive portion located in the first conductive layer 1701, a second conductive portion located in the second conductive layer 1702, and a third conductive portion located in the third conductive layer 1703.

[0147] Preferably, the material of the first conductive layer 1701 includes titanium, the material of the second conductive layer 1702 includes aluminum, and the material of the third conductive layer 1703 includes titanium.

[0148] Based on the same inventive concept, Figure 4 , Figure 5 As shown, another embodiment of the present application provides a display panel 100, which includes a substrate 11 and a transparent conductive layer 15, a first metal layer 17 and a sub-pixel 16 that are sequentially away from the substrate 11. The transparent conductive layer 15 is located on one side of the substrate 11, and the transparent conductive layer 15 includes a first transparent wire 151. The first metal layer 17 is located on the side of the transparent conductive layer 15 away from the substrate 11, and the first metal layer 17 includes a first metal trace 171, and the first metal trace 171 is electrically connected to the first transparent wire 151. The display panel 100 also includes an isolation structure 14, which is disposed on one side of the substrate 11, and the isolation structure 14 encloses an isolation opening 141. The sub-pixel 16 is at least partially disposed in the isolation opening 141, and at least part of the sub-pixel 16 is electrically connected to the first metal trace 171.

[0149] The display panel 100 provided by the present application forms a double-layer conductive structure through the first transparent wire 151 and the first metal wiring 171, which is electrically connected to the sub-pixel 16, and can transmit signals, which can effectively reduce resistance and voltage drop, improve the uniformity of current distribution, and thus enhance the performance and reliability of the circuit. At the same time, by arranging the transparent conductive layer 15 on the side of the first metal layer 17 close to the substrate 11, the transparent conductive layer 15 is relatively moved downward, which can improve the over-engraving of the transparent conductive layer 15, and solve the problem of dark spots in pixels caused by the disconnection of the transparent conductive layer 15 in the light-transmitting display area 102.

[0150] Reference Figure 6 As shown, in one embodiment, the display panel 100 includes a main display area 101 and a light-transmitting display area 102, the first metal trace 171 is located in the main display area 101, and the transparent conductive layer 15 further includes a second transparent wire 152, and the second transparent wire 152 is located in the light-transmitting display area 102. The sub-pixels 16 located in the light-transmitting display area 102 are electrically connected through the second transparent wire 152.

[0151] Preferably, in the light-transmitting display area 102 , at least two sub-pixels 16 with the same luminous color are connected via a second transparent conductive wire 152 .

[0152] Among them, multiple sub-pixels 16 in the transparent display area 102 are connected together for driving through the second transparent wire 152, and a transparent conductive path is formed between the sub-pixels 16, which can drive the sub-pixels 16 to emit light and maintain the high transmittance of the transparent display area 102. It can not only maintain the conductive requirements in the transparent display area 102, but also optimize the transmittance, thereby meeting the high transmittance requirements of the under-screen camera.

[0153] Reference Fig.11 , Fig.12 As shown, in one embodiment, the first metal layer 17 includes a first conductive layer 1701, a second conductive layer 1702, and a third conductive layer 1703 sequentially arranged along a side away from the substrate 11. The first metal trace 171 includes a first conductive portion located in the first conductive layer 1701, a second conductive portion located in the second conductive layer 1702, and a third conductive portion located in the third conductive layer 1703.

[0154] Preferably, the material of the first conductive layer 1701 includes titanium, the material of the second conductive layer 1702 includes aluminum, and the material of the third conductive layer 1703 includes titanium.

[0155] Based on the same inventive concept, Fig.10 As shown, another embodiment of the present application provides a method for preparing a display panel, wherein the structures corresponding to the steps of the preparation method can refer to Figures 11 to 21 The display panel 100 includes a main display area 101 and a light-transmitting display area 102, the main display area 101 at least partially surrounds the light-transmitting display area 102, and the preparation method includes the following steps:

[0156] Step S10, forming a transparent conductive layer 15 on one side of the substrate 11, and forming a first metal layer 17 on the transparent conductive layer 15;

[0157] Step S20, patterning the first metal layer 17 to form a first metal wiring 171 located in the main display area 101 and a fourth metal wiring 174 located in the light-transmitting display area 102;

[0158] Step S30, removing the fourth metal wiring 174, and forming a first transparent wire 151 and a second transparent wire 152 on the transparent conductive layer 15; wherein the first transparent wire 151 is located in the main display area 101 and is located on a side of the first metal wiring 171 close to the substrate 11; and the second transparent wire 152 is located in the light-transmitting display area 102;

[0159] Step S40 , forming a plurality of sub-pixels 16 on the side of the first metal wiring 171 away from the substrate 11 , the sub-pixels 16 of the main display area 101 are electrically connected to the first metal wiring 171 , and the sub-pixels 16 of the light-transmitting display area 102 are electrically connected to the second transparent conductive wire 152 .

[0160] The method for preparing a display panel provided in the present application forms a transparent conductive path between sub-pixels 16 through the second transparent wire 152, which can drive the sub-pixels 16 to emit light, and can also maintain the high transmittance of the light-transmitting display area 102, which can not only maintain the conductive requirements in the light-transmitting display area 102, but also optimize the transmittance, and meet the requirements of the under-screen camera for high transmittance. In addition, the first transparent wire 151 and the first metal wiring 171 form a double-layer conductive structure for signal transmission, which can effectively reduce resistance and voltage drop, improve the uniformity of current distribution, and thus enhance the performance and reliability of the circuit. At the same time, the transparent conductive layer 15 is made before the first metal layer 17, so the transparent conductive layer 15 is relatively moved downward, which can improve the over-engraving of the transparent conductive layer 15 and solve the problem of dark spots in pixels caused by the disconnection of the transparent conductive layer 15 in the light-transmitting display area 102.

[0161] Reference Fig.12 , Fig.13 As shown, in one embodiment, step S20 includes:

[0162] A photoresist 20 is coated on the first metal layer 17, and the photoresist 20 is exposed and developed to form a first metal line pattern located in the main display area 101 and a second transparent wire pattern located in the light-transmitting display area 102. The photoresist 20 covered by the second transparent wire pattern is removed to form a first metal routing 171 and a fourth metal routing 174 in the first metal layer 17.

[0163] Reference Figures 12 to 16 As shown, in one embodiment, the first metal layer 17 includes a first conductive layer 1701 , a second conductive layer 1702 and a third conductive layer 1703 sequentially stacked on the transparent conductive layer 15 .

[0164] In step S30, the fourth metal wiring 174 is removed, and a first transparent wire 151 and a second transparent wire 152 are formed on the transparent conductive layer 15, including:

[0165] Step S31, removing the photoresist 20 on the fourth metal wiring 174;

[0166] Step S32, removing the third conductive layer 1703 and part of the second conductive layer 1702 in the fourth metal wiring 174 by using a dry etching process;

[0167] Step S33, using a wet etching process to remove the remaining portion of the second conductive layer 1702 in the fourth metal wiring 174, and etching the transparent conductive layer 15 to form a first transparent conductive line 151 and a second transparent conductive line 152;

[0168] Step S34 , using a dry etching process to remove the first conductive layer 1701 in the fourth metal wiring 174 , and at the same time remove the photoresist 20 on the first metal wiring 171 .

[0169] Specifically, a first metal layer 17 is formed on the transparent conductive layer 15 by a high-temperature metal deposition process; a photoresist 20 is coated on the first metal layer 17, and the photoresist 20 is exposed and developed, and a first metal trace 171 and a fourth metal trace 174 are formed on the first metal layer 17 by a dry etching process; the photoresist on the fourth metal trace 174 is first removed, and then the third conductive layer 1703 and part of the second conductive layer 1702 of the fourth metal trace 174 are removed by a dry etching process, and then the ITO and the second conductive layer 1702 are removed by a wet etching process, so that the transparent conductive layer 15 forms a first transparent conductive wire 151 and a second transparent conductive wire 152, and the first conductive layer 1701 is removed by a dry etching process again, and the photoresist 20 on the first metal trace 171 is removed by a stripping process. Among them, the first conductive layer 1701 and the third conductive layer 1703 are made of the same material, both Ti (titanium), and the second conductive layer 1702 is made of Al (aluminum).

[0170] Reference Fig.17 , Fig.18 As shown, in one embodiment, after step S30, the preparation method further includes:

[0171] An insulating layer 12 is formed on one side of the substrate 11, so that the insulating layer 12 at least covers the first metal wiring 171 and the second transparent wire 152;

[0172] At least one first connection via 1201 located in the main display area 101 and at least one second connection via 1202 located in the light-transmitting display area 102 are formed on the insulating layer 12; that is, the insulating layer 12 of the main display area 101 is provided with at least one first connection via 1201, and the insulating layer 12 of the light-transmitting display area 102 is provided with at least one second connection via 1202. The sub-pixel 16 of the main display area 101 is connected to the first metal wiring 171 through the first connection via 1201, and the sub-pixel 16 of the light-transmitting display area 102 is electrically connected to the second transparent conductive wire 152 through the second connection via 1202.

[0173] Preferably, the display panel 100 also includes a second metal layer 19 located on the side of the transparent conductive layer 15 close to the substrate 11, the insulating layer 12 includes a first insulating layer 121 and a second insulating layer 122 arranged in sequence along a side away from the substrate 11, the transparent conductive layer 15 is located on the side of the first insulating layer 121 away from the substrate 11, and the first insulating layer 121 is located on the side of the second metal layer 19 away from the substrate 11.

[0174] Preferably, a third connection via 1211 is provided on the first insulating layer 121 , and the first transparent conductive line 151 is electrically connected to at least a portion of the fifth metal trace 191 in the second metal layer 19 through the third connection via 1211 .

[0175] Preferably, the orthographic projection of the first connection via 1201 on the substrate 11 does not overlap with the orthographic projection of the third connection via 1211 on the substrate 11. The first connection via 1201 and the third connection via 1211 are staggered to prevent the via structure from affecting the flatness of the anode in the sub-pixel 16.

[0176] Reference Fig.19 , Fig. 20 , Fig.21 As shown, in one embodiment, after step S30, the preparation method further includes:

[0177] An isolation structure 14 is made on one side of the substrate 11, so that the isolation structure 14 encloses an isolation opening 141 and a light-transmitting opening 142; wherein the isolation opening 141 is located in the main display area 101 and the light-transmitting display area 102, at least part of the sub-pixels 16 are located in the isolation opening 141, the light-transmitting opening 142 is located in the light-transmitting display area 102, and the orthographic projection of the light-transmitting opening 142 on the substrate 11 overlaps with the orthographic projection of the second transparent wire 152 on the substrate 11.

[0178] Preferably, between forming the insulating layer 12 and manufacturing the isolation structure 14, the preparation method further includes:

[0179] A pixel definition layer 13 is formed on a side of the insulating layer 12 facing away from the substrate 11. The isolation structure 14 is located on a side of the pixel definition layer 13 away from the insulating layer 12. The pixel definition layer 13 is defined by a pixel opening 131 corresponding to and connected to the isolation opening 141. The first electrode 161 is at least partially exposed to the pixel opening 131. The orthographic projection of the isolation opening 141 on the substrate 11 is located within the orthographic projection range of the pixel opening 131 on the substrate 11.

[0180] Based on the same inventive concept, Fig. 22 As shown, another embodiment of the present application provides a method for preparing a display panel, wherein the structures corresponding to the steps of the preparation method can refer to Figure 23 to Figure 25The display panel 100 includes a main display area 101 and a light-transmitting display area 102, the main display area 101 at least partially surrounds the light-transmitting display area 102, and the preparation method includes the following steps:

[0181] Step S100, forming a passivation layer 30 on one side of the substrate 11, forming a transparent conductive layer 15 on the passivation layer 30, and forming a first metal layer 17 on the transparent conductive layer 15;

[0182] Step S200, patterning the first metal layer 17 and the transparent conductive layer 15 to form a first metal wiring 171 located in the main display area 101 and a fourth metal wiring 174 located in the light-transmitting display area 102, and forming a first transparent wire 151 and a second transparent wire 152 in the transparent conductive layer 15; wherein the first transparent wire 151 is located in the main display area 101 and is located on a side of the first metal wiring 171 close to the substrate 11; and the second transparent wire 152 is located in the light-transmitting display area 102;

[0183] Step S300, removing the fourth metal wiring 174;

[0184] Step 400 , forming a plurality of sub-pixels 16 on the side of the first metal wiring 171 away from the substrate 11 , the sub-pixels 16 of the main display area 101 are electrically connected to the first metal wiring 171 , and the sub-pixels 16 of the light-transmitting display area 102 are electrically connected to the second transparent conductive wire 152 .

[0185] The method for preparing a display panel provided in an embodiment of the present application forms a transparent conductive path between sub-pixels 16 through a second transparent wire 152, which can drive the sub-pixels 16 to emit light, and can also maintain the high transmittance of the light-transmitting display area 102, which can not only maintain the conductive requirements in the light-transmitting display area 102, but also optimize the transmittance, and meet the requirements of the under-screen camera for high transmittance. In addition, the first transparent wire 151 and the first metal wiring 171 form a double-layer conductive structure for signal transmission, which can effectively reduce resistance and voltage drop, improve the uniformity of current distribution, and thus enhance the performance and reliability of the circuit. At the same time, the transparent conductive layer 15 is made before the first metal layer 17, so the transparent conductive layer 15 moves downward relatively, which can improve the over-engraving of the transparent conductive layer 15 and solve the problem of pixel dark spots caused by the disconnection of the transparent conductive layer 15 in the light-transmitting display area 102. Another embodiment of the present application provides a display device, which includes the display panel 100 in the above embodiment. The display device can be located in a smart device (such as a mobile phone, VR device, computer, TV, car display, etc.).

[0186] The display device provided by the present application has a display panel 100 that forms a transparent conductive path between sub-pixels 16 through a second transparent wire 152, which can drive the sub-pixels 16 to emit light and maintain the high transmittance of the light-transmitting display area 102, which can not only maintain the conductivity requirements in the light-transmitting display area 102, but also optimize the transmittance, and meet the requirements of the under-screen camera for high transmittance. In addition, the first transparent wire 151 and the first metal wiring 171 form a double-layer conductive structure for signal transmission, which can effectively reduce resistance and voltage drop, improve the uniformity of current distribution, and thus enhance the performance and reliability of the circuit. At the same time, the transparent conductive layer 15 is relatively moved downward, which can improve the situation where the transparent conductive layer 15 is over-engraved, and solve the problem of dark spots in pixels caused by the disconnection of the transparent conductive layer 15 in the light-transmitting display area 102.

[0187] The composition, preparation, etc. of the isolation structure (or partition structure or isolation column) of the present application are further described in patents CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, and PCT / CN2024 / 099072 for reference.

[0188] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0189] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0190] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises a main display area and a light-transmitting display area, wherein the main display area at least partially surrounds the light-transmitting display area, and the display panel further comprises: substrate; A transparent conductive layer, located on one side of the substrate, the transparent conductive layer comprising a first transparent conductive wire and a second transparent conductive wire; the first transparent conductive wire is located in the main display area, and the second transparent conductive wire is located in the light-transmitting display area; A first metal layer, located on a side of the first transparent conductive line away from the substrate, the first metal layer comprising a first metal wiring, the first metal wiring being located in the main display area and electrically connected to the first transparent conductive line; The sub-pixel is located on a side of the first metal layer away from the substrate and is located in the main display area and the light-transmitting display area; wherein the sub-pixel located in the main display area is electrically connected to the first metal wiring, and the sub-pixel located in the light-transmitting display area is electrically connected to the second transparent wire.

2. The display panel according to claim 1, characterized in that: A side of the first metal wiring close to the substrate is in contact with and connected to a side of the first transparent wire facing away from the substrate, and an orthographic projection of the first transparent wire on the substrate is within a range of an orthographic projection of the first metal wiring on the substrate; Preferably, an orthographic projection of the first transparent conductive line on the substrate overlaps with an orthographic projection of the first metal wiring on the substrate.

3. The display panel according to claim 1, characterized in that: The display panel further includes: An isolation structure, located on one side of the substrate, the isolation structure encloses an isolation opening and a light-transmitting opening; The isolation opening is located in the main display area and the light-transmitting display area, and at least part of the sub-pixels are located in the isolation opening; The light-transmitting opening is located in the light-transmitting display area, and an orthographic projection of the light-transmitting opening on the substrate overlaps with an orthographic projection of the second transparent wire on the substrate.

4. The display panel according to claim 3, characterized in that: The display panel further comprises an insulating layer located on a side of the isolation structure facing the substrate, the insulating layer covers the first metal layer, the insulating layer located in the main display area is provided with at least one first connection via hole, and the insulating layer located in the light-transmitting display area is provided with at least one second connection via hole; The sub-pixels in the main display area are connected to the first metal wiring through the first connecting vias, and the sub-pixels in the light-transmitting display area are electrically connected to the second transparent conductive wires through the second connecting vias; Preferably, the orthographic projections of the first connecting via and the second connecting via on the substrate are located within the orthographic projection range of the isolation structure on the substrate.

5. The display panel according to claim 4, characterized in that: The display panel further comprises a second metal layer located on a side of the transparent conductive layer close to the substrate, the insulating layer comprises a first insulating layer and a second insulating layer sequentially arranged along a side away from the substrate, the transparent conductive layer is located on a side of the first insulating layer away from the substrate, and the first insulating layer is located on a side of the second metal layer away from the substrate; Preferably, a third connecting via is provided on the first insulating layer, and the first transparent conductive wire is electrically connected to at least part of the fifth metal trace in the second metal layer through the third connecting via; Preferably, an orthographic projection of the first connecting via hole on the substrate and an orthographic projection of the third connecting via hole on the substrate do not overlap with each other.

6. The display panel according to claim 4, characterized in that: The sub-pixel comprises a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked on the substrate, the isolation opening exposes a portion of the first electrode, and the light-emitting functional layer and the second electrode are located in the isolation opening; The isolation structure comprises a support portion and a crown portion, wherein the crown portion is located on a side of the support portion away from the substrate, and an orthographic projection of an end of the support portion close to the crown portion on the substrate is located within an orthographic projection of the crown portion on the substrate; the support portion is electrically connected to the second electrode; The first electrode located in the main display area is electrically connected to the first metal wiring and the first transparent wire, and the plurality of first electrodes located in the light-transmitting display area are electrically connected to each other through the second transparent wire.

7. The display panel according to claim 4, characterized in that: The transparent conductive layer located in the light-transmitting display area further includes a third transparent wire, and the third transparent wire is electrically connected to the support portion of the adjacent isolation structure; The first metal layer further includes a second metal trace and a third metal trace, the second metal trace and the third metal trace are located in the light-transmitting display area, the second metal trace is electrically connected to the second transparent wire, the third metal trace is located in the light-transmitting display area, and the third metal trace is electrically connected to the third transparent wire; Preferably, the second metal wiring is connected between the second transparent wire and the first electrode of the sub-pixel; Preferably, the third metal wiring is connected between the third transparent conductive line and the supporting portion of the isolation structure.

8. The display panel according to claim 7, characterized in that: The orthographic projection of the second metal trace on the substrate is located outside the orthographic projection of the light-transmitting opening on the substrate; The orthographic projection of the third metal trace on the substrate is located outside the orthographic projection of the light-transmitting opening on the substrate.

9. The display panel according to claim 6, characterized in that: The display panel further includes: A pixel definition layer is located on a side of the insulating layer away from the substrate, the isolation structure is located on a side of the pixel definition layer away from the insulating layer, the pixel definition layer defines a pixel opening corresponding to the isolation opening, and the first electrode is at least partially exposed to the pixel opening; The orthographic projection of the isolation opening on the substrate is located within the orthographic projection range of the pixel opening on the substrate.

10. The display panel according to claim 7, characterized in that: The display panel further includes: A pixel definition layer is located on a side of the insulating layer away from the substrate, and the isolation structure located in the light-transmitting display area is electrically connected to the third transparent wire through the sleeve holes of the pixel definition layer and the insulating layer; Preferably, the insulating layer includes a first insulating layer and a second insulating layer sequentially arranged along a side away from the substrate, the third transparent wire is located on a side of the first insulating layer away from the substrate, and the hole is located in the pixel definition layer and the first insulating layer.

11. The display panel according to claim 1, characterized in that: The first metal layer includes a first conductive layer, a second conductive layer and a third conductive layer which are sequentially arranged along a side away from the substrate; The first metal trace comprises a first conductive portion located at the first conductive layer, a second conductive portion located at the second conductive layer, and a third conductive portion located at the third conductive layer; Preferably, the material of the first conductive layer includes titanium, the material of the second conductive layer includes aluminum, and the material of the third conductive layer includes titanium.

12. A display panel, characterized in that: The display panel comprises: substrate, A transparent conductive layer, located on one side of the substrate, wherein the transparent conductive layer comprises a first transparent conductive wire; A first metal layer, located on a side of the transparent conductive layer away from the substrate, the first metal layer comprising a first metal trace, and the first metal trace is electrically connected to the first transparent conductive wire; An isolation structure is disposed on one side of the substrate, and the isolation structure encloses an isolation opening; A sub-pixel is at least partially disposed in the isolation opening, and at least a portion of the sub-pixel is electrically connected to the first metal wiring.

13. The display panel according to claim 12, characterized in that: The display panel comprises a display area and a light-transmitting display area, the first metal wiring is located in the display area, and the transparent conductive layer further comprises a second transparent wire located in the light-transmitting display area; The sub-pixel located in the light-transmitting display area is connected to the second transparent conductive wire; Preferably, in the light-transmitting display area, at least two sub-pixels having the same luminous color are connected via the second transparent wire.

14. The display panel according to claim 12, characterized in that: The first metal layer includes a first conductive layer, a second conductive layer and a third conductive layer which are sequentially arranged along a side away from the substrate; The first metal trace comprises a first conductive portion located at the first conductive layer, a second conductive portion located at the second conductive layer, and a third conductive portion located at the third conductive layer; Preferably, the material of the first conductive layer includes titanium, the material of the second conductive layer includes aluminum, and the material of the third conductive layer includes titanium.

15. A method for preparing a display panel, characterized in that: The display panel comprises a main display area and a light-transmitting display area, wherein the main display area at least partially surrounds the light-transmitting display area, and the preparation method comprises: A transparent conductive layer is formed on one side of the substrate, and a first metal layer is formed on the transparent conductive layer; Patterning the first metal layer to form a first metal wiring located in the main display area and a fourth metal wiring located in the light-transmitting display area; The fourth metal wiring is removed, and a first transparent wire and a second transparent wire are formed in the transparent conductive layer; wherein the first transparent wire is located in the main display area and on a side of the first metal wiring close to the substrate; and the second transparent wire is located in the light-transmitting display area; A plurality of sub-pixels are formed on a side of the first metal wiring away from the substrate, the sub-pixels in the main display area are electrically connected to the first metal wiring, and the sub-pixels in the light-transmitting display area are electrically connected to the second transparent conductive wire.

16. The method for preparing a display panel according to claim 15, characterized in that: The patterning of the first metal layer to form the first metal wiring located in the main display area and the fourth metal wiring located in the light-transmitting display area includes: Coating a photoresist on the first metal layer, exposing and developing the photoresist to form a first metal line pattern located in the main display area and a second transparent wire pattern located in the light-transmitting display area, and removing the photoresist covered by the second transparent wire pattern to form a first metal trace and a fourth metal trace on the first metal layer; Preferably, the first metal layer comprises a first conductive layer, a second conductive layer and a third conductive layer sequentially stacked on the transparent conductive layer; The method of removing the fourth metal wiring and forming a first transparent wire and a second transparent wire in the transparent conductive layer includes: Removing the photoresist on the fourth metal trace; Removing the third conductive layer and a portion of the second conductive layer in the fourth metal wiring by using a dry etching process; Using a wet etching process to remove the remaining portion of the second conductive layer in the fourth metal wiring, and etching the transparent conductive layer to form the first transparent conductive wire and the second transparent conductive wire; The first conductive layer in the fourth metal wiring is removed by a dry etching process, and the photoresist on the first metal wiring is removed at the same time.

17. The method for preparing a display panel according to claim 15, characterized in that: After removing the fourth metal wiring and forming a first transparent wire and a second transparent wire in the transparent conductive layer, the method further includes: forming an insulating layer on one side of the substrate, so that the insulating layer at least covers the first metal wiring and the second transparent wire; At least one first connection via hole located in the main display area and at least one second connection via hole located in the light-transmitting display area are formed on the insulating layer; wherein the sub-pixel in the main display area is connected to the first metal wiring through the first connection via hole, and the sub-pixel in the light-transmitting display area is electrically connected to the second transparent wire through the second connection via hole; Preferably, the display panel further comprises a second metal layer located on a side of the transparent conductive layer close to the substrate, the insulating layer comprises a first insulating layer and a second insulating layer sequentially arranged along a side away from the substrate, the transparent conductive layer is located on a side of the first insulating layer away from the substrate, and the second insulating layer is located on a side of the second metal layer away from the substrate; Preferably, a third connecting via is provided on the first insulating layer, and the first transparent conductive wire is electrically connected to at least part of the fifth metal trace in the second metal layer through the third connecting via; Preferably, an orthographic projection of the first connecting via hole on the substrate and an orthographic projection of the third connecting via hole on the substrate do not overlap with each other.

18. The method for preparing a display panel according to claim 17, characterized in that: After removing the fourth metal wiring and forming a first transparent wire and a second transparent wire in the transparent conductive layer, the method further includes: An isolation structure is fabricated on one side of the substrate, so that the isolation structure encloses an isolation opening and a light-transmitting opening; wherein the isolation opening is located in the main display area and the light-transmitting display area, and at least part of the sub-pixels are located in the isolation opening; the light-transmitting opening is located in the light-transmitting display area, and the orthographic projection of the light-transmitting opening on the substrate overlaps with the orthographic projection of the second transparent wire on the substrate; Preferably, between forming the insulating layer and manufacturing the isolation structure, the method further comprises: A pixel definition layer is formed on a side of the insulating layer away from the substrate, the isolation structure is located on a side of the pixel definition layer away from the insulating layer, the pixel definition layer is defined with a pixel opening corresponding to the isolation opening, and the first electrode of the sub-pixel is at least partially exposed to the pixel opening; the orthographic projection of the isolation opening on the substrate is located within the orthographic projection range of the pixel opening on the substrate.

19. A method for preparing a display panel, the display panel comprising a main display area and a light-transmitting display area, the main display area at least partially surrounding the light-transmitting display area, characterized in that: The method comprises: A passivation layer is formed on one side of the substrate, a transparent conductive layer is formed on the passivation layer, and a first metal layer is formed on the transparent conductive layer; The first metal layer and the transparent conductive layer are patterned to form a first metal wiring located in the main display area and a fourth metal wiring located in the light-transmitting display area, and a first transparent wire and a second transparent wire are formed in the transparent conductive layer; wherein the first transparent wire is located in the main display area and is located on a side of the first metal wiring close to the substrate; and the second transparent wire is located in the light-transmitting display area; removing the fourth metal trace; A plurality of sub-pixels are formed on a side of the first metal wiring away from the substrate, the sub-pixels in the main display area are electrically connected to the first metal wiring, and the sub-pixels in the light-transmitting display area are electrically connected to the second transparent conductive wire.

20. A display device, characterized in that: A display panel comprising any one of claims 1 to 14.

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