Display panel, preparation method of display panel, display device and electronic equipment

Abstract

The invention provides a display panel, a preparation method of the display panel, a display device and electronic equipment. The display panel comprises pixel areas and isolation areas, and each isolation area is located between every two adjacent pixel areas. The isolation region comprises an isolation structure, a first part of a first light-emitting layer, a first part of a charge generation layer, a first part of a second light-emitting layer and a first part of a second electrode which are sequentially arranged along a first direction; each pixel area comprises a first electrode, a first light-emitting layer second part, a charge generation layer second part, a second light-emitting layer second part and a second electrode second part which are sequentially arranged in the first direction. Due to the arrangement of the isolation structure, the first part of the charge generation layer and the second part of the charge generation layer are discontinuous, crosstalk can be reduced, the problem of smear of a low-brightness and low-gray-scale display scene of the display panel is solved, and the display effect is improved. The second electrode first part and the second electrode second part are continuous, so that the power consumption of the display panel is reduced.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202510505866.6, filed on April 18, 2025, with the State Intellectual Property Office of the People's Republic of China, entitled "Display Panel, Method for Preparing Display Panel, Display Device and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of display technology, and in particular to a display panel, a method for manufacturing the display panel, a display device, and an electronic device. Background Technology

[0004] Organic light-emitting diode (OLED) display devices have been identified as a highly promising display technology due to their advantages such as thinness, light weight, wide viewing angle, active light emission, continuously adjustable emission color, low cost, fast response speed, low energy consumption, low driving voltage, wide operating temperature range, simple manufacturing process, high luminous efficiency, and flexible display capability.

[0005] In the field of OLED display panels, a commonly used structure is the tandem structure, which is a technique that improves device performance by vertically stacking multiple light-emitting layers. Its core design utilizes a charge generation layer (CGL) to connect multiple independent light-emitting layers, forming a tandem structure. This results in sub-pixels with high brightness and luminous efficiency. The charge generation layer is specifically located between the stacked light-emitting layers and is responsible for redistributing electrons and holes to adjacent light-emitting layers, achieving efficient charge separation and injection.

[0006] However, because the current efficiency of the tandem structure is doubled and the charge generation layer 04 has strong conductivity, when a certain sub-pixel is lit, other adjacent sub-pixels will also be lit due to the lateral current conducted by the charge generation layer 04, exacerbating the low grayscale crosstalk problem. In addition, the charge generation layer will also generate capacitance with the anode and cathode of the OLED, which can easily cause the deterioration of ghosting in low-brightness, low-grayscale display scenes. Summary of the Invention

[0007] This application provides a display panel, a method for manufacturing the display panel, a display device, and an electronic device to reduce crosstalk between pixel areas, improve display performance, and reduce the power consumption of the display panel.

[0008] Firstly, this application provides a display panel. The display panel includes pixel areas and isolation areas, with the isolation areas located between two adjacent pixel areas, or rather, the isolation areas surrounding the pixel areas. Specifically, the isolation areas include an isolation structure, a first portion of a first light-emitting layer, a first portion of a charge-generating layer, a first portion of a second light-emitting layer, and a first portion of a second electrode, arranged sequentially along a first direction. The pixel areas include a first electrode, a second portion of a first light-emitting layer, a second portion of a charge-generating layer, a second portion of a second light-emitting layer, and a second portion of a second electrode, arranged sequentially along the first direction. Because the isolation areas have isolation structures, the first and second portions of the charge-generating layers are discontinuous, forming a gap between them. The first and second portions of the charge-generating layers are insulated at this gap. This design electrically disconnects the charge-generating layers of adjacent pixel areas. When a pixel area is lit, neighboring pixel areas are less likely to be lit by lateral currents conducted through the charge-generating layers, reducing crosstalk and thus improving the display effect. Furthermore, the first and second portions of the second electrode are continuous, meaning the second electrode is a continuous layer structure. This prevents overlap between the charge generation layer and the second electrode, and reduces the likelihood of disconnection, thus improving the reliability of the display panel. Moreover, this design results in a lower lateral resistance for the continuous second electrode, which helps reduce IR drop and consequently lowers the power consumption of the display panel. Additionally, the charge generation layer in the pixel area is divided into smaller regions by the isolation structure; specifically, the second portion of the charge generation layer has a smaller area. This reduces parasitic capacitance in the pixel area, improving ghosting issues in low-brightness, low-grayscale display scenes and enhancing the overall display effect.

[0009] In some technical solutions, the sum of the thickness of the second part of the first light-emitting layer and the thickness of the second part of the charge-generating layer, h1, the sum of the thicknesses of the second part of the first light-emitting layer, the second part of the charge-generating layer, and the second part of the light-emitting layer, h, and the thickness H of the isolation structure satisfy: h1 < H < h. This solution is beneficial for making the charge-generating layer disconnected, that is, the first part of the charge-generating layer and the second part of the charge-generating layer, while maintaining the continuity of the first part and the second part of the second electrode, thereby reducing crosstalk of the display panel, reducing parasitic capacitance, and improving the display effect of the display panel.

[0010] The aforementioned isolation structure may include a first structural portion and a second structural portion. The first structural portion protrudes from a first surface of the second structural portion, and the first surface serves as the connecting surface between the first and second structural portions, thereby forming an isolation groove between the first and second structural portions of the isolation structure. The sum of the thickness of the second portion of the first light-emitting layer and the thickness of the second portion of the charge-generating layer, h1, and the thickness H1 of the second structural portion satisfy: h1 < H1. The isolation groove is positioned higher than the charge-generating layer, making it less prone to slope during the fabrication of the charge-generating layer, thus facilitating discontinuity between the first and second portions of the charge-generating layer, creating gaps.

[0011] There are various choices for the material of the isolation structure. For example, the first structural part can be an insulating material layer, and the second structural part can include at least one of a metal, inorganic material, or organic material. In this design, the first structural part is in contact with the first light-emitting layer, therefore the first portion of the first light-emitting layer and the first portion of the charge-generating layer are insulated from the isolation structure. The material of the second structural part can be chosen from various options and can be designed according to actual needs. The material of the second structural part can be the same as or different from the material of the first structural part.

[0012] In some technical solutions, the aforementioned second structural part is a metal layer, and the display panel also includes a wiring layer located on the substrate of the display panel. The aforementioned second structural part is electrically connected to the wiring layer and also electrically connected to the second part of the charge generation layer. This allows the second part of the charge generation layer to be electrically connected to the wiring layer, thereby releasing the charge in the second part of the charge generation layer and improving the display effect of the display panel.

[0013] The extension direction of the isolation structure surrounding a pixel region can be chosen in several ways. For example, in one technical solution, the isolation structure surrounding a pixel region forms a closed loop, which can improve the independence of the pixel region and reduce crosstalk to a significant extent; it can also significantly reduce the capacitance introduced by the charge generation layer, improve the ghosting problem in low-brightness, low-grayscale display scenes, and improve the display effect of the display panel. Alternatively, in another technical solution, the isolation structure surrounding a pixel region forms an open loop. The isolation structure of this open loop includes an opening, which allows for flexible control of the isolation effect as needed. The second electrode does not need to climb in the opening area, so the thickness of the second electrode is also relatively continuous in the opening area, which helps to reduce the cross voltage between the first and second electrodes, thereby further reducing power consumption.

[0014] In this application, a sub-pixel can be formed within a pixel region, or at least two sub-pixels can be formed. In some technical solutions, a sub-pixel is formed by the first electrode, the second part of the first light-emitting layer, the second part of the charge-generating layer, the second part of the second light-emitting layer, and the second part of the second electrode within a pixel region. This is equivalent to setting an isolation region around the sub-pixel, or in other words, setting an isolation region between two adjacent sub-pixels, resulting in good isolation between sub-pixels.

[0015] In some technical solutions, the display panel includes multiple sub-pixels, including a first sub-pixel and a second sub-pixel. The thickness of the first sub-pixel is greater than the thickness of the second sub-pixel, and the thickness of the isolation structure surrounding the first sub-pixel is greater than the thickness of the isolation structure surrounding the second sub-pixel. The thickness of the surrounding isolation structure is designed based on the structural thickness of the sub-pixels, allowing for targeted design of isolation structures for different sub-pixels. This results in better isolation performance, reducing crosstalk between a large number of sub-pixels and further reducing the power consumption of the display panel 1.

[0016] In other technical solutions, the display panel includes multiple sub-pixels, including a first sub-pixel and a second sub-pixel. The thickness of the first sub-pixel is different from that of the second sub-pixel. The thickness of the isolation structure located around the first sub-pixel is the same as that of the isolation structure located around the second sub-pixel. The thickness of the isolation structure is greater than the sum of the thickness of the first light-emitting layer and the charge-generating layer of the first sub-pixel, but less than the sum of the thicknesses of the first light-emitting layer, the charge-generating layer, and the second light-emitting layer of the first sub-pixel. This solution can fabricate isolation structures of different thicknesses around sub-pixels in a single process, which simplifies the fabrication process of the isolation structure.

[0017] The display panel comprises multiple subpixels, which together form multiple pixel units. These subpixels include red, green, and blue subpixels. A pixel unit consists of one red subpixel, one blue subpixel, and two green subpixels arranged in two rows and two columns, with the two green subpixels arranged along one diagonal of the pixel unit. Display panels using this subpixel arrangement exhibit better display quality.

[0018] In one technical solution, the display panel includes multiple pixel regions, and the isolation structures surrounding the multiple pixel regions are integrally formed to form an isolation mesh. This solution can simplify the manufacturing process and also allows only one layer of isolation structure to be set between two adjacent pixel regions, thereby saving space in the display panel and increasing the sub-pixel arrangement density of the display panel.

[0019] In one technical solution, the display panel includes multiple pixel areas, and the isolation area between two adjacent pixel areas has two isolation structures. This solution can achieve dual isolation and has a good isolation effect.

[0020] The width of the isolation structure can range from 1μm to 10μm. While maintaining reliable shape and size, a smaller width is better, thereby reducing the area occupied by the isolation structure, increasing the sub-pixel density of the display panel, and ultimately improving the display effect.

[0021] Secondly, this application also provides a method for fabricating a display panel. This method is used to fabricate the display panel provided in the first aspect. The method includes: fabricating a hole on a first side surface of a substrate; fabricating a first metal layer on the first side surface of the substrate, and filling the hole with a first metal structure, wherein the first metal layer is electrically connected to a wiring layer on a second side surface of the substrate through the first metal structure; fabricating a first structural portion of an isolation structure on the surface of the first metal layer; and patterning the first metal layer to separate the second structural portion of the isolation structure and the first electrode. In this technical solution, the material of the second structural portion of the isolation structure is the same as the material of the second electrode, which simplifies the fabrication process of the isolation structure. The display panel fabricated using this method has less crosstalk between sub-pixels, better display performance, and lower power consumption.

[0022] Thirdly, this application also provides a method for fabricating a display panel. This method is used to fabricate the display panel provided in the first aspect. The method includes: fabricating a hole on a first side surface of a substrate; fabricating a first electrode on the first side surface of the substrate and filling a portion of the hole with a second metal structure, the first electrode being electrically connected to a wiring layer on a second side surface of the substrate through the second metal structure; fabricating a second structural portion of an isolation structure on the first side surface of the substrate and filling another portion of the hole with a third metal structure, the second structural portion being electrically connected to a wiring layer on the second side surface of the substrate through the third metal structure; fabricating a first structural portion of the isolation structure on the surface of the second structural portion; and side-cutting the end of the second structural portion facing the first structural portion to form an isolation groove. In this scheme, the first electrode and the second structural portion of the isolation structure are fabricated separately, thus facilitating the design of the specific thickness of the second structural portion according to actual needs, allowing for more flexible selection. Furthermore, the display panel fabricated using this method has less crosstalk between sub-pixels, better display performance, and lower power consumption.

[0023] Fourthly, this application also provides a display device, which includes a cover plate and a display panel as described in the first aspect, wherein the cover plate is disposed on the display side of the display panel. This display device has less crosstalk, better display effect, and lower power consumption.

[0024] Fifthly, this application also provides an electronic device. The electronic device includes a housing and a display device as described in the fourth aspect above, the display device being connected to the housing. The display device of this electronic device has good display performance and low power consumption. Attached Figure Description

[0025] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the structure of a display device in an embodiment of this application;

[0027] Figure 3 This is a partial top view of the display panel in an embodiment of this application;

[0028] Figure 4 This is a partial cross-sectional view of the display panel in an embodiment of this application;

[0029] Figure 5 This is a partial top view of the display panel in an embodiment of this application;

[0030] Figure 6 This is a partial top view of the display panel in an embodiment of this application;

[0031] Figure 7 This is a partial structural diagram of the display panel in an embodiment of this application;

[0032] Figure 8 This is a partial top view of the display panel in an embodiment of this application;

[0033] Figure 9 This is a partial top view of the display panel in an embodiment of this application;

[0034] Figure 10 This is a partial top view of the display panel in an embodiment of this application;

[0035] Figure 11 This is a partial top view of the display panel in an embodiment of this application;

[0036] Figure 12 This is a partial cross-sectional view of the display panel in an embodiment of this application;

[0037] Figure 13 This is a partial cross-sectional view of the display panel in an embodiment of this application;

[0038] Figure 14 This is a partial top view of the display panel in an embodiment of this application;

[0039] Figure 15 This is a partial cross-sectional view of the display panel in an embodiment of this application;

[0040] Figure 16 This is a partial cross-sectional view of the display panel in an embodiment of this application;

[0041] Figure 17 This is a partial cross-sectional view of the display panel in an embodiment of this application;

[0042] Figure 18 This is a schematic diagram of a manufacturing process for a display panel in an embodiment of this application;

[0043] Figure 19 This is a schematic diagram of a manufacturing process for a display panel in an embodiment of this application.

[0044] Figure label:

[0045] 1-Electronic device; 11-Housing;

[0046] 12-Display device; 121-Cover plate;

[0047] 122 - Polarizing film; 123 - Touch panel;

[0048] 124 - Display panel; 125 - Transparent adhesive layer;

[0049] 126 - Adhesive backing; 01 - Base material;

[0050] 011 - Routing layer; 02 - First electrode;

[0051] 03-First luminescent layer; 031-First part of the first luminescent layer;

[0052] 032 - Second part of the first light-emitting layer; 04 - Charge generation layer;

[0053] 041 - First part of the charge generation layer; 042 - Second part of the charge generation layer;

[0054] 043 - Gap; 05 - Second light-emitting layer;

[0055] 051 - First part of the second light-emitting layer; 052 - Second part of the second light-emitting layer;

[0056] 06-Second electrode; 061-First part of the second electrode;

[0057] 062 - Second part of the second electrode; 07 - Isolation region;

[0058] 070 - Isolation structure;

[0059] 071 - First structural section; 072 - Second structural section;

[0060] 073-Isolation groove; 0731-First side surface;

[0061] 0732 - Second side view; 074 - Opening;

[0062] 075 - First isolation structure; 076 - Second isolation structure;

[0063] 077 - Third isolation structure; 08 - Pixel area;

[0064] 081 - Subpixel; 0811 - First subpixel;

[0065] 0812 - Second sub-pixel; 0813 - Third sub-pixel;

[0066] 082 - Pixel unit; 09 - Pixel definition layer;

[0067] X - First direction; M - First plane;

[0068] R - Red subpixel; G - Green subpixel;

[0069] B - Blue subpixel; W - White subpixel;

[0070] 001 - First side surface; 002 - Second side surface;

[0071] 003 - Hole; 004 - First metal layer;

[0072] 005 - First Metal Structure. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0074] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more” unless the context clearly indicates otherwise.

[0075] The terms “comprising,” “including,” “having,” and variations thereof, as described in this specification, mean “including, but not limited to,” unless otherwise specifically emphasized.

[0076] To facilitate understanding of the display panel, the method for manufacturing the display panel, the display device, and the electronic device provided in the embodiments of this application, their application scenarios will be introduced first below.

[0077] The electronic devices provided in this application include, for example, consumer electronics, home electronics, automotive electronics, and financial terminal electronics. Consumer electronics include, for example, mobile phones, tablets, laptops, e-readers, personal computers (PCs), personal digital assistants (PDAs), desktop monitors, smart wearable products (e.g., smartwatches, smart bracelets), virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, and drones. Home electronics include, for example, smart door locks, televisions, remote controls, refrigerators, and small household appliances (e.g., soymilk makers, robot vacuum cleaners). Automotive electronics include, for example, in-vehicle displays. Financial terminal products include, for example, automated teller machines (ATMs) and self-service terminals.

[0078] For ease of explanation, we will use a mobile phone as an example below. Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of this application is shown below. Figure 1 The electronic device 1 may include a housing 11 and a display device 12, with the display device 12 connected to the housing 11. Exemplarily, the display device 12 is fixedly mounted on the housing 11, which has a receiving cavity. Components such as the circuit board, electronic components, camera module, processor, and battery in the display device 12 can be installed within this cavity. Exemplarily, the housing 11 may include a mid-frame and a back cover, which can be either separate or integrated structures; this embodiment does not impose specific limitations. Furthermore, the housing 11 may be made of materials such as metal, plastic, or glass to meet the requirements of wear resistance, impact resistance, corrosion resistance, and aesthetics for the electronic device 1. The specific materials of the metal can be varied, such as aluminum alloy, titanium alloy, or stainless steel; the specific materials of the plastic can also be varied, such as acrylonitrile-butadiene-styrene, polycarbonate, or polypropylene; and the specific materials of the glass can also be varied, such as anti-glare glass.

[0079] The display panel 124 in this application can be an organic light-emitting diode (OLED) display panel 124, a quantum dot light-emitting diode (QLED) display panel 124, or an active-matrix organic light-emitting diode (AMOLED) display panel 124. In the following embodiments of this application, the display panel 124 can be described as an OLED display panel 124, in which case the display device 12 is an OLED display device 12. The arrangement of other forms of display devices 12 is similar.

[0080] Figure 2 This is a schematic diagram of a display device 12 in an embodiment of this application, as shown below. Figure 2 As shown, in some embodiments of this application, the display device 12 may include a cover plate 121 and a display panel 124. The cover plate 121 may be a transparent glass cover plate or a cover plate made of organic materials such as polyimide (PI) to protect the display panel 124 while reducing the impact on the display effect of the display device 12. Furthermore, the display device 12 may also include a polarizer 122 and a touch panel 123. The polarizer 122 is disposed between the cover plate 121 and the touch panel 123, and the touch panel 123 is disposed between the polarizer 122 and the display panel 124. The polarizer 122 may be a circular polarizer to reduce the contrast reduction caused by external light reflection, and the touch panel 123 is used to implement the touch function of the display panel 124.

[0081] In the specific configuration of the display device 12, the polarizer 122 can be fixed to the side of the cover plate 121 facing the display panel 124, and the touch panel 123 can be disposed between the polarizer 122 and the display panel 124. The cover plate 121 and the polarizer 122, the polarizer 122 and the touch panel 123, and the touch panel 123 and the display panel 124 can be bonded together by a transparent adhesive layer 125, which may specifically include optically clear adhesive (OCA) or transparent pressure-sensitive adhesive, etc. In this embodiment, the touch panel 123 can be disposed separately as an independent structure. In some embodiments of this application, the touch panel 123 can also be integrated with the display panel 124 into a single structure.

[0082] An adhesive backing 126 can also be applied to the side of the display panel 124 away from the touch panel 123. The adhesive backing 126 can be a composite film layer to serve as electromagnetic shielding, thereby preventing signal interference between the display device 12 and the printed circuit board. In addition, the adhesive backing 126 can also protect and support the display device 12 as a whole.

[0083] In some other embodiments of this application, the touch panel 123 can be fixed to the cover plate 121, and then the polarizer 122 can be disposed between the touch panel 123 and the display panel 124. The arrangement of other structures and the connection between the structures are not described in detail here.

[0084] Figure 3 This is a partial top view of the display panel 124 in an embodiment of this application. Figure 4 This is a partial cross-sectional view of the display panel 124 in an embodiment of this application. For example, Figure 4 It can be understood as Figure 3 A sectional view of AA. (e.g.) Figure 3 and Figure 4 As shown, in some embodiments of this application, the display panel 124 includes an isolation region 07 and a pixel region 08, which are arranged along a first plane M. The isolation region 07 is located on the periphery of the pixel region 08, or in other words, the isolation region 07 is located between two adjacent pixel regions 08. The display panel 124 includes a substrate 01, a first emission layer 03 (EL), a charge generation layer 04 (CGL), a second emission layer 05, and a second electrode 06 arranged sequentially along a first direction X. The first direction X can be understood as the thickness direction of the display panel 124, and the first plane M is perpendicular to the first direction X. The first light-emitting layer 03 includes a first light-emitting layer first portion 031 and a first light-emitting layer second portion 032; the charge-generating layer 04 includes a charge-generating layer first portion 041 and a charge-generating layer second portion 042; the second light-emitting layer 05 includes a second light-emitting layer first portion 051 and a second light-emitting layer second portion 052; and the second electrode 06 includes a second electrode first portion 061 and a second electrode second portion 062.

[0085] In some embodiments, the first light-emitting layer 03 located in the isolation region is a first portion 031 of the first light-emitting layer, the charge-generating layer 04 located in the isolation region 07 is a first portion 041 of the charge-generating layer, the second light-emitting layer 05 located in the isolation region is a first portion 051 of the second light-emitting layer, and the second electrode 06 located in the isolation region 07 is a first portion 061 of the second electrode. The isolation region 07 may also include an isolation structure 070. In some embodiments, the isolation region 07 may be considered to include an isolation structure 070, a first portion 031 of the first light-emitting layer, a first portion 041 of the charge-generating layer, a first portion 051 of the second light-emitting layer, and a first portion 061 of the second electrode arranged sequentially along the first direction X. In some embodiments, the isolation structure 070 is disposed on the surface of the substrate 01.

[0086] In some embodiments, the first light-emitting layer 03 located in the pixel region 08 is a second portion 032 of the first light-emitting layer, the charge-generating layer 04 located in the pixel region 08 is a second portion 042 of the charge-generating layer, the second light-emitting layer 05 located in the pixel region 08 is a second portion 052 of the second light-emitting layer, and the second electrode 06 located in the pixel region 08 is a second portion 062 of the second electrode. The pixel region 08 may also include a first electrode 02. Therefore, in some embodiments, the pixel region 08 may be considered to include a first electrode 02, a second portion 032 of the first light-emitting layer, a second portion 042 of the charge-generating layer, a second portion 052 of the second light-emitting layer, and a second portion 062 of the second electrode arranged sequentially along the first direction X. In some embodiments, the first electrode 02 is disposed on the surface of the substrate 01.

[0087] The first electrode 02, the second part of the first light-emitting layer 032, the second part of the charge-generating layer 042, the second part of the second light-emitting layer 052, and the second part of the second electrode 062 located in the pixel area 08 form a sub-pixel 081. The first light-emitting layer 03 and the second light-emitting layer 05 of the sub-pixel 081 can emit light of a certain color when energized, thereby realizing the display of a certain color.

[0088] In some embodiments, the substrate 01 can be a planarization layer (PLN); in other embodiments, the substrate 01 can be a driving circuit substrate, which includes a pixel driving circuit, and the pixel driving circuit can be a wiring layer 011. The pixel driving circuit of the driving circuit substrate is used to provide pixel driving signals to control the light emission state of multiple sub-pixels 081 of the display panel 124, so that the whole panel can display the image.

[0089] In some embodiments, the main structure of the charge generation layer 04 may include a photosensitive material layer and a carrier transport layer. The working principle of the charge generation layer 04 mainly involves the photoelectric effect and carrier transport. When light shines on the photosensitive material layer, photons are absorbed, exciting electron-hole pairs. These electron-hole pairs are pushed in different directions by the electric field force, thereby generating charge. In the photosensitive material layer, electrons and holes move along different paths and are eventually transported to the adjacent first light-emitting layer 03 and second light-emitting layer 05 through the carrier transport layer.

[0090] In some embodiments, only one sub-pixel 081 is provided within a pixel region 08, and this sub-pixel 081 is the smallest display unit of the display panel 124. That is, the first electrode 02, the second part of the first light-emitting layer 032, the second part of the charge-generating layer 042, the second part of the second light-emitting layer 052, and the second part of the second electrode 062 of a pixel region 08 form a sub-pixel 081. Providing an isolation region 07 around the pixel region 08 is equivalent to providing an isolation region 07 around the sub-pixel 081, or in other words, providing an isolation region 07 between two adjacent sub-pixels 081. The isolation effect between sub-pixels is good. In some embodiments, the projected area of ​​the pixel region 08 on the first plane M is larger than the projected area of ​​the sub-pixel 081 on the first plane M. In some embodiments, the area enclosed by the isolation region 07 can be considered as the pixel region 08. There may also be a portion of the area between the periphery of the sub-pixel 081 and the isolation region 07, which also belongs to the pixel region 08. Sub-pixel 081 is generally a light-emitting unit. For example, only the area covered by the first electrode 02 can stimulate the first light-emitting layer 03 and the second light-emitting layer 05 to emit light. Therefore, the area covered by the first electrode 02 is sometimes considered to be the area corresponding to sub-pixel 081.

[0091] In some embodiments, a pixel region 08 may also have two or more sub-pixels 081. The isolation region 07 separates different regions. In this embodiment, a pixel region 08 has only one sub-pixel 081 as an example.

[0092] In some embodiments of this application, the sub-pixels 081 included in the display panel 124 may include sub-pixels 081 of multiple colors, thereby enabling color display of the image. For example, the sub-pixel 081 used to display red is a red sub-pixel R; the sub-pixel 081 used to display green is a green sub-pixel G; the sub-pixel 081 used to display blue is a blue sub-pixel B; and the sub-pixel 081 used to display white is a white sub-pixel W. The white sub-pixel W can be used to improve the display brightness and color performance of the pixel unit 082.

[0093] The color selection of sub-pixels 081 included in the display panel 124 in this application embodiment, as well as the arrangement of sub-pixels 081 of different colors, are all possible implementations and do not limit this application. For example, in some embodiments, the display panel 124 may include sub-pixels 081 of one, two, three, four, or more colors.

[0094] In this embodiment, the display panel 124 includes a plurality of sub-pixels 081, which together form a plurality of pixel units 082. Each pixel unit 082, as the smallest repeating unit, can also be called a logical pixel or pixel point, and can be composed of at least two sub-pixels 081. The plurality of pixel units 082 in the display panel 124 are arranged in a repeating pattern. By adjusting the light emission ratio of the sub-pixels 081 of the pixel unit 082, the pixel unit 082 can present a corresponding color on the display panel 124.

[0095] In the embodiments of this application, the specific number of sub-pixels 081 included in pixel unit 082 is not limited. In some embodiments, pixel unit 082 may include two sub-pixels 081, for example, which are any two selected from red sub-pixel R, green sub-pixel G, blue sub-pixel B, or white sub-pixel W; in some embodiments, pixel unit 082 may include three sub-pixels 081, for example, which are any three selected from red sub-pixel R, green sub-pixel G, blue sub-pixel B, and white sub-pixel W; and for example, pixel unit 082 may include four sub-pixels 081, which are any four selected from red sub-pixel R, green sub-pixel G, blue sub-pixel B, and white sub-pixel W. The colors of the sub-pixels 081 included in pixel unit 082 may be different, or pixel unit 082 may also include sub-pixels 081 of the same color.

[0096] like Figure 3 As shown, in some embodiments, a pixel unit 082 of the display panel 124 includes a red sub-pixel R, a blue sub-pixel B, and two green sub-pixels G. The red sub-pixel R, blue sub-pixel B, and two green sub-pixels G are arranged in a two-row, two-column array. The two green sub-pixels G are arranged along one diagonal of the pixel unit 082, and the red sub-pixel R and the blue sub-pixel B are arranged along the other diagonal of the pixel unit 082. Figure 3 In the illustrated embodiment, from a row perspective, a green sub-pixel G and a red sub-pixel R can be located in the same row, and a blue sub-pixel B and a green sub-pixel G can be located in another row; from a column perspective, a green sub-pixel G and a blue sub-pixel B can be located in the same column, and a red sub-pixel R and a green sub-pixel G can be located in another column.

[0097] Figure 5This is a partial top view of the display panel 124 in an embodiment of this application, as shown in the diagram. Figure 5 As shown, in some embodiments, pixel unit 082 includes a red sub-pixel R, a blue sub-pixel B, and a green sub-pixel G, which are arranged in a line to form a red-green-blue (RGB) arrangement. Alternatively, the red sub-pixel R, blue sub-pixel B, and green sub-pixel G included in pixel unit 082 can also be arranged in a triangle.

[0098] Figure 6 This is a partial top view of the display panel 124 in an embodiment of this application, as shown in the diagram. Figure 6 As shown, in some embodiments, pixel unit 082 may include a red sub-pixel R, a blue sub-pixel B, a green sub-pixel G, and a white sub-pixel W. The red sub-pixel R, the blue sub-pixel B, the green sub-pixel G, and the white sub-pixel W may be arranged in a line to form a red-green-blue-white (RGBW) arrangement.

[0099] In some implementations, pixel unit 082 may also include a red sub-pixel R and a blue sub-pixel B arranged in a row; or pixel unit 082 may also include a red sub-pixel R and a green sub-pixel G arranged in a row. This application does not list them all.

[0100] In some embodiments of this application, the emission color of each sub-pixel 081 of pixel unit 082 can be the same; for example, each sub-pixel 081 can be a white sub-pixel W. Under this design, by adjusting the emission ratio of the sub-pixels 081 of pixel unit 082, different colors of light can be separated from white through the spectral filtering effect of different color filter units in the color filter film layer, thereby enabling pixel unit 082 to display the corresponding color on display panel 124.

[0101] Furthermore, this application embodiment does not limit the size or proportion of the light-emitting area of ​​each sub-pixel 081 of the pixel unit 082. For example, in some embodiments, the light-emitting areas of sub-pixels 081 of different colors included in the pixel unit 082 are the same; for example, the light-emitting areas of red sub-pixel R, green sub-pixel G, and blue sub-pixel B are the same. Or, as... Figure 3 , Figure 5 and Figure 6As shown, in some embodiments, the luminous area of ​​the blue sub-pixel B is larger than that of the red sub-pixel R, and the luminous area of ​​the red sub-pixel R is larger than that of the green sub-pixel G. Typically, with the same luminous area, the blue sub-pixel B has the lowest lifetime, the red sub-pixel R has a slightly higher lifetime, and the green sub-pixel G has the highest lifetime. Therefore, the luminous area of ​​the blue sub-pixel B can be designed to be the largest among the three, and the luminous area of ​​the green sub-pixel G can be designed to be comparable to that of the red sub-pixel R, or slightly smaller than that of the red sub-pixel R. This reduces the current density of the blue sub-pixel B, decreases its decay rate, and thus matches the lifetime of the blue sub-pixel B with that of the red and green sub-pixels G.

[0102] The outline shape of sub-pixel 081 in this application can also have multiple options. Figure 3 , Figure 5 and Figure 6 Taking the outline shape of sub-pixel 081 as a rectangle as an example, in practical applications, the outline shape of sub-pixel 081 in this application can also be a circle, a rhombus, or a hexagon, etc.

[0103] Please refer to Figure 4 The first electrode 02, the second portion of the first light-emitting layer, the second portion of the charge-generating layer 042, the second portion of the second light-emitting layer 052, and the second portion of the second electrode, located in the aforementioned pixel region 08, are formed on the surface of the substrate 01. This can be understood as follows: the first electrode 02 is directly fabricated on the surface of the substrate 01, followed by the fabrication of the first light-emitting layer 03, the charge-generating layer 04, the second light-emitting layer 05, and the second electrode 06. The isolation structure 070 is located between the substrate 01 and the first light-emitting layer 03 along the first direction X. On the side of the isolation structure 070 facing away from the substrate 01, the first portion of the first light-emitting layer 031, the first portion of the charge-generating layer 041, the first portion of the second light-emitting layer 051, and the first portion of the second electrode 061 are arranged sequentially. In some embodiments, the first portion 031 and the second portion 032 of the first light-emitting layer are prepared simultaneously, or are in the same layer structure; the first portion 041 and the second portion 042 of the charge-generating layer are prepared simultaneously, or are in the same layer structure; the first portion 051 and the second portion 052 of the second light-emitting layer are prepared simultaneously, or are in the same layer structure; the first portion 061 and the second portion 062 of the second electrode are prepared simultaneously, or are in the same layer structure. When preparing the display panel, an isolation structure 070 of the isolation region 07 is first prepared on the substrate, and then the first light-emitting layer 03, the charge-generating layer 04, the second light-emitting layer 05, and the second electrode 06 are prepared. Thus, the first light-emitting layer 03, the charge-generating layer 04, the second light-emitting layer 05, and the second electrode 06 simultaneously cover the isolation region 07 and the pixel region 08.

[0104] Due to the isolation structure 070, a height difference exists between the isolation area 07 and the pixel area 08, causing the first part 041 and the second part 042 of the charge generation layer to be discontinuous. A gap 043 is formed between the first part 041 and the second part 042 of the charge generation layer. The first part 041 and the second part 042 of the charge generation layer are insulated at the gap 043, making them at least partially electrically disconnected, rather than continuously covering the display panel 124. The gap 043 between the first part 041 and the second part 042 of the charge generation layer may be filled with a non-conductor. In this embodiment, the first part 041 and the second part 042 of the charge generation layer are discontinuous, electrically disconnected at the gap 043, but physically filled or connected by other structures. This design electrically disconnects the charge generation layers 04 of two adjacent pixel regions 08. Therefore, when a sub-pixel 081 is lit, neighboring sub-pixels 081 are less likely to be lit due to lateral current conducted by the charge generation layers 04, reducing crosstalk and improving display performance. Furthermore, the first portion 061 and the second portion 062 of the second electrode are continuous, meaning the second electrode 06 is a continuous layer structure. The second electrode 06 continuously covers the isolation region 07 and the pixel region 08, preventing overlap between the charge generation layers 04 and the second electrode 06, and reducing the likelihood of disconnection, thus improving the reliability of the display panel 124. Moreover, this design also results in a lower lateral resistance for the continuous second electrode 06, which helps reduce power supply voltage drop (IR drop) and consequently lowers the power consumption of the display panel 124. Furthermore, the charge generation layer 04 of pixel region 08 is divided into smaller areas by the gap 043 created by the isolation structure 070, that is, the area of ​​the second part 042 of the charge generation layer is smaller. Therefore, the capacitance generated by the second part 042 of the charge generation layer 04 with the first electrode 02 is smaller, and the capacitance generated with the second electrode 06 is also smaller. Thus, the parasitic capacitance generated by the sub-pixel 081 of pixel region 08 can be reduced, thereby improving the problem of ghosting in low-brightness, low-grayscale display scenes of display panel 124 and improving the display effect of display panel 124.

[0105] Figure 4In the illustrated embodiment, the first portion 051 and the second portion 052 of the second light-emitting layer are continuous, and the second light-emitting layer 05 continuously covers the pixel region 08 and the isolation region 07. This ensures reliable continuity of the second electrode 06 and a relatively uniform thickness of the second electrode 06 at the edge of the isolation region 07, or in other words, a relatively uniform overall thickness of the second electrode 06. However, in practical applications, the first portion 051 and the second portion 052 of the second light-emitting layer may not be continuous, and gaps may form in the second light-emitting layer 05 at the edge of the isolation region 07, or the layer may be thinner. This application does not impose specific limitations on these aspects.

[0106] Figure 7 This is a partial structural diagram of the display panel in an embodiment of this application. Please refer to it. Figure 4 and Figure 7 In some embodiments, the sum h1 of the thickness of the second portion 032 of the first light-emitting layer and the second portion of the charge-generating layer is less than the thickness H of the peripheral isolation structure 070, and the sum h of the thickness of the second portion 032 of the first light-emitting layer, the second portion 042 of the charge-generating layer, and the second portion 052 of the second light-emitting layer is greater than the thickness H of the peripheral isolation structure 070, i.e., h1 < H < h. The above thicknesses can be understood as relative thicknesses, i.e., comparing the thicknesses of the second portion 032 of the first light-emitting layer, the second portion 042 of the charge-generating layer, and the second portion 052 of the second light-emitting layer at positions adjacent to the isolation region 07 in the isolation region 07 and the pixel region 08. In particular, since there is a gap between the first electrode 02 and the isolation structure 070, the second portion 032 of the first light-emitting layer, the second portion 042 of the charge-generating layer, and the second portion 052 of the second light-emitting layer can be considered to be fabricated on the same plane as the isolation structure 070. This results in the isolation region 07 being positioned in the first direction X between the surface of the second part of the charge generation layer that is away from the substrate 01 and the surface of the second part of the second electrode 062 that faces the substrate 01.

[0107] In some embodiments of this application, the sum h1 of the thickness of the second portion 032 of the first light-emitting layer and the second portion 042 of the charge-generating layer of the pixel region 08 is less than the thickness H of the surrounding isolation structure 070, i.e., h1 < H. This results in a height difference between the isolation region 07 and the adjacent pixel region 08, and the surface of the isolation structure 070 facing away from the substrate is higher than the height of the second portion 042 of the charge-generating layer at the adjacent position. This facilitates the formation of a gap between the first portion 041 of the charge-generating layer located in the isolation region 07 and the second portion 042 of the charge-generating layer located in the pixel region 08, making the first portion 041 and the second portion 042 of the charge-generating layer discontinuous and electrically disconnected. Consequently, the charge-generating layer 04 of the adjacent sub-pixel 081 is at least partially disconnected, thus reducing ghosting and crosstalk.

[0108] Furthermore, the sum h of the thickness of the second portion 032 of the first light-emitting layer, the thickness of the second portion 042 of the charge-generating layer, and the thickness of the second portion 052 of the second light-emitting layer is greater than the thickness H of the surrounding isolation structure 070, i.e., H < h. The surface of the isolation structure 070 facing away from the substrate does not reach the height of the second portion 062 of the second electrode, making the second portion 062 of the second electrode located in the pixel region 08 continuous with the first portion of the second electrode located in the isolation region 07. In this scheme, the second electrode 06 is a continuous layer structure, maintaining the continuity of the second electrode 06, which makes the second electrode 06 have a lower lateral resistance, which is beneficial to reducing the power supply voltage drop (IR drop), thereby reducing the power consumption of the display panel 124. The continuous arrangement of the second electrode 06 prevents the charge-generating layer 04 from overlapping with the second electrode 06, which is beneficial to improving the reliability and product yield of the display panel 124.

[0109] In summary, in this application, the position of the isolation structure 070 facing away from the substrate 01 along the first direction X is between the surface of the second portion 042 of the charge generation layer of the pixel region 08 facing away from the substrate 01 and the surface of the second portion 062 of the second electrode facing the substrate 01. This allows the charge generation layer 04 to be discontinuous at the edge of the isolation structure 070, while the second electrode 06 remains continuous. This improves the ghosting and crosstalk problems of the display panel 124, enhances the display effect, and reduces the power consumption of the display panel 124.

[0110] Please refer to Figure 4 and Figure 7In some embodiments, the isolation structure 070 includes a first structural portion 071 and a second structural portion 072 arranged along a first direction X, with the second structural portion 072 located between the first structural portion 071 and the substrate 01. Alternatively, the first structural portion 071 and the second structural portion 072 are arranged in a direction toward the substrate 01. On the side of the isolation structure 070 facing the pixel region 08, the surface of the first structural portion 071 facing the second structural portion 072 protrudes beyond a first surface of the second structural portion 072. This first surface is the connecting surface between the first structural portion 071 and the second structural portion 072. An isolation groove 073 is formed between the first structural portion 071 and the second structural portion 072. The first structural portion 071 can be considered to form the outward edge of the second structural portion 072. The aforementioned isolation groove 073 is recessed towards the interior of the isolation structure 070. The arrangement of this isolation groove 073 creates a groove step between the first structural portion 071 and the second structural portion 072, making it difficult for the charge-generating layer 04 to climb. This facilitates the formation of a gap between the first portion 041 and the second portion 042 of the charge-generating layer 04, resulting in a discontinuity between them. Furthermore, the sum h1 of the thickness of the first light-emitting layer 03 and the charge-generating layer 04 is less than the thickness H1 of the second structural portion 072. This causes the isolation groove 073 to be positioned higher than the charge-generating layer 04, facilitating a break in the connection of the charge-generating layer 04 at the location of the isolation groove 073 in the isolation structure 070. This divides the charge-generating layer 04 into the first portion 041 and the second portion 042, creating a gap between them.

[0111] Regarding the specific structure of the aforementioned isolation groove 073, in some embodiments, such as Figure 4 and Figure 7 As shown, one side of the isolation groove 073 is a first side surface 0731, which is the surface of the first structural part 071 facing the substrate 01. The other side is a second side surface 0732, which is the side surface of the second structural part 072. The second side surface 0732 can also be the aforementioned first surface. The first side surface 0731 can be parallel to the first plane M, and the angle formed between the second side surface 0732 and the first side surface 0731 is an acute angle. In some other embodiments, the angle formed between the second side surface 0732 and the first side surface 0731 can also be a right angle or an obtuse angle. Furthermore, the first side surface 0731 can be a plane, or it can be non-planar; similarly, the second side surface 0732 can also be a plane, or it can be non-planar. In summary, a groove is formed between the first side surface 0731 and the second side surface 0732, and the opening of the groove faces the pixel region 08.

[0112] Regarding the material selection for the aforementioned isolation structure 070, the first structural part 071 can be an insulating material layer, and the second structural part 072 can include at least one of metal, inorganic material, or organic material. The first structural part 071 is located on the side of the second structural part 072 facing away from the substrate 01. Since the second structural part 072 is made of an insulating material, it facilitates insulation between the first portion 031 of the first light-emitting layer and the first portion 041 of the charge-generating layer located in the isolation region 07 and the isolation structure 070. In particular, the edge of the first portion 041 of the charge-generating layer 04 is also less likely to be electrically connected to the isolation structure 070. For scenarios where the second structural part 072 is made of metal, this solution can improve the reliability of the disconnection between the first portion 041 and the second portion 042 of the charge-generating layer 04, i.e., the first portion 041 and the second portion 042 of the charge-generating layer are electrically disconnected at the location of the gap.

[0113] Figure 8 This is a partial top view of the display panel 124 in an embodiment of this application, as shown in the diagram. Figure 8 As shown, in some embodiments, the second structural portion 072 is a metal layer, and the aforementioned substrate 01 also includes a wiring layer 011. It is worth noting that the substrate 01 here is a broad concept; the structure below the sub-pixels 081 of the display panel 124 can be considered as the substrate 01. The second structural portion 072 of the aforementioned isolation structure 070 is electrically connected to the wiring layer 011, and the second structural portion 072 is also electrically connected to the second portion 042 of the charge generation layer 04. In this scheme, the second portion 042 of the charge generation layer 04 can be electrically connected to the wiring layer 011 through the second structural portion 072, thereby releasing the charge in the second portion 042 of the charge generation layer and improving the display effect of the display panel 124. For example, when a certain sub-pixel 081 needs to be turned off, in addition to using the first electrode 02 to control the sub-pixel 081 to turn off the power, the wiring layer 011 and the second structural part 072 can also be used to release the charge of the second part 042 of the charge generation layer 04 of the charge generation layer 04, which can eliminate or reduce the parasitic capacitance of the sub-pixel 081, realize the reset of the sub-pixel 081, and improve the display effect of the display panel 124.

[0114] Figure 9 This is a partial top view of the display panel 124 in an embodiment of this application, as shown in the diagram. Figure 8 and Figure 9As shown, in some embodiments, the isolation structure 070 around a pixel region 08 forms a closed loop. From a top view, the isolation structure 070 forms a closed loop, so there are gaps between the second part 042 of the charge generation layer of pixel region 08 and the charge generation layer 04 in any direction around it, and they are discontinuous. This allows the second part 042 of the charge generation layer of pixel region 08 to be disconnected from the first part of the charge generation layer of adjacent pixel region 08 at any position around it, which can improve the independence of sub-pixel 081 and reduce crosstalk to a large extent. It can also reduce the capacitance introduced by the charge generation layer 04 to a large extent, improve the ghosting problem in low brightness and low grayscale display scenes, and improve the display effect of display panel 124.

[0115] or, Figure 10 This is a partial top view of the display panel 124 in an embodiment of this application, as shown in the diagram. Figure 8 and Figure 10 As shown, in some embodiments, the isolation structure 070 surrounding a pixel region 08 forms an open ring. This open ring isolation structure 070 includes an opening 074, effectively meaning there is no isolation structure 070 at the opening 074. This solution allows for flexible control of the isolation effect, with the specific structure of the isolation structure 070 tailored to requirements. Although the second electrode 06 continuously covers the isolation region 07 and the pixel region 08, the relatively high height of the isolation structure 070 necessitates a ramp for the second electrode 06, resulting in a thinner local thickness in the ramp region and a larger cross-voltage from cathode to anode. However, the second electrode 06 does not require a ramp in the area of ​​the opening 074, thus its thickness is more continuous in this area, which helps reduce the cross-voltage between the first electrode 02 and the second electrode 06, further reducing power consumption.

[0116] The specific location, number, and size of the openings in the aforementioned open ring can be designed according to actual needs. For example, the isolation structure 070 can have openings 074 in areas that are sensitive to or have large cross-voltage, or it can have openings 074 in areas where the cross-voltage isolation requirement is low. Furthermore, areas with large cross-voltage can have larger openings 074 in the isolation structure 070, while areas with high cross-voltage isolation requirements can have smaller openings 074, and so on. These are not listed here. Additionally, the isolation structure 070 surrounding a pixel region 08 can include one opening 074, two openings 074, or a greater number of openings 074.

[0117] like Figures 8-10As shown, in some embodiments, the display panel 124 includes multiple pixel regions 08. Some of the pixel regions 08 have isolation structures 070 around their periphery, while other pixel regions 08 do not have isolation structures 070 around their periphery. For example, isolation structures 070 are provided around the pixel regions 08 where sensitive sub-pixels 081 such as crosstalk and ghosting are located. In other words, isolation structures 070 are provided around the sub-pixels 081 such as crosstalk and ghosting to reduce the number of isolation structures 070 provided on the display panel 124, which is beneficial to improving the sub-pixel 081 arrangement density of the display panel 124. Figure 9 and Figure 10 The example shown here, where the red sub-pixel R and the green sub-pixel G have an isolation structure 070 around them, while the blue sub-pixel B does not, is merely one possible illustration. In practical applications, other configurations are also possible. For example, the red sub-pixel R may not have an isolation structure 070 around it, while the green sub-pixel G may have an isolation structure 070 around it, etc., which will not be elaborated upon here.

[0118] Figure 11 This is a partial top view of the display panel 124 in an embodiment of this application, as shown in the diagram. Figure 11 As shown, in some embodiments, the display panel 124 includes a plurality of pixel regions 08, each of which has an isolation structure 070 around its periphery. This solution helps to improve the isolation effect between the sub-pixels 081 of the display panel 124, thereby reducing crosstalk and ghosting between adjacent sub-pixels 081 and reducing the power consumption of the display panel 124.

[0119] like Figures 9-11 In the embodiment shown, the isolation structures 070 around different pixel regions 08 can be made independent of each other, so that the thickness, width, and other dimensions, shape, or material of the isolation structures 070 around the sub-pixels 081 in the pixel region 08 can be designed for the sub-pixels 081, thereby specifically segmenting the charge generation layer 04 of the sub-pixels 081 and maintaining the continuity of the second electrode 06.

[0120] Figure 12 This is a partial cross-sectional view of the display panel 124 in an embodiment of this application, as shown below. Figures 9-12As shown, in some embodiments, the multiple sub-pixels 081 of the display panel include a first sub-pixel 0811 and a second sub-pixel 0812. The thickness of the first sub-pixel 0811 and the thickness of the second sub-pixel 0812 are different. The thickness of the isolation structure 070 located around the first sub-pixel 0811 is different from the thickness of the isolation structure 070 located around the second sub-pixel 0812. For example, the isolation structure 070 located around the first sub-pixel 0811 is a first isolation structure 075, and the isolation structure 070 located around the second sub-pixel 0812 is a second isolation structure 076. Then, the thickness of the first isolation structure 075 is different from the thickness of the second isolation structure 076. In some embodiments, the thickness of the first sub-pixel 0811 is greater than the thickness of the second sub-pixel 0812, and therefore the thickness of the first isolation structure 075 is greater than the thickness of the second isolation structure 076. In summary, the thickness of the peripheral isolation structure 070 is designed based on the structural thickness of the sub-pixel 081, so that the isolation structure 070 can be designed specifically for different sub-pixels 081, resulting in a better isolation effect. This reduces crosstalk between a large number of sub-pixels 081 and further reduces the power consumption of the display panel 124.

[0121] Of course, in some embodiments, the plurality of sub-pixels 081 of the display panel 124 may further include a third sub-pixel 0813, and the isolation structure 070 located around the third sub-pixel 0813 is a third isolation structure 077. The thickness of the third sub-pixel 0813 is different from the thickness of the first sub-pixel 0811 and the thickness of the second sub-pixel 0812. Therefore, the thickness of the isolation structure 070 located around the third sub-pixel 0813 is also different from the thickness of the isolation structure 070 located around the first sub-pixel 0811 and the thickness of the isolation structure 070 located around the second sub-pixel 0812. For example, the thickness of the third sub-pixel 0813 is less than the thickness of the second sub-pixel 0812, that is, the thickness of the third sub-pixel 0813, the thickness of the second sub-pixel 0812 and the thickness of the first sub-pixel 0811 increase sequentially. Therefore, the thickness of the first isolation structure 075, the thickness of the second isolation structure 076 and the thickness of the third isolation structure 077 increase sequentially.

[0122] The first sub-pixel 0811, the second sub-pixel 0812, and the third sub-pixel 0813 mentioned above are sub-pixels 081 of different colors, and therefore have different thicknesses. For example, the first sub-pixel 0811 is the blue sub-pixel B, the second sub-pixel 0812 is the red sub-pixel R, and the third sub-pixel 0813 is the green sub-pixel G. The blue material used to prepare the blue sub-pixel B usually has the lowest luminous efficiency and poor material stability, resulting in faster pixel decay. Therefore, a thicker organic layer is needed to improve brightness and lifespan. The red material used to prepare the red sub-pixel R has a slightly higher luminous efficiency than the blue material, requiring a slightly thinner organic layer to balance efficiency and color performance. The green material used to prepare the green sub-pixel G has a high luminous efficiency, and a smaller organic layer thickness is required to achieve sufficient brightness and color purity.

[0123] Figure 13 This is a partial cross-sectional view of the display panel 124 in an embodiment of this application, as shown below. Figure 13 As shown, in some embodiments, the multiple sub-pixels 081 of the display panel 124 include a first sub-pixel 0811 and a second sub-pixel 0812. The thickness of the first sub-pixel 0811 and the thickness of the second sub-pixel 0812 are different. For example, the thickness of the first sub-pixel 0811 can be greater than the thickness of the second sub-pixel 0812, or the thickness of the first sub-pixel 0811 can be less than the thickness of the second sub-pixel 0812. The thickness of the isolation region 07 located around the first sub-pixel 0811 is the same as the thickness of the isolation structure 070 located around the second sub-pixel 0812. This solution can fabricate the isolation structures 070 around the sub-pixels of different thicknesses of the display panel 124 in a single process, which helps to simplify the fabrication process of the isolation structure 070. The isolation structure 070 can be designed and fabricated based on the thickness of the first sub-pixel 0811. For example, the thickness of the isolation structure 070 can be greater than the sum of the thickness of the first light-emitting layer 03 and the charge-generating layer 04 of the first sub-pixel 0811, and less than the sum of the thickness of the first light-emitting layer 03, the charge-generating layer 04, and the second light-emitting layer 05 of the first sub-pixel 0811.

[0124] Figure 14 This is a partial top view of the display panel 124 in an embodiment of this application, as shown in the diagram. Figure 14 As shown, in some embodiments, the display panel 124 includes a plurality of pixel regions 08, and the isolation structures 070 surrounding the plurality of pixel regions 08 are integrally formed to form an isolation mesh. This solution simplifies the manufacturing process and allows for the placement of an isolation structure 070 between two adjacent pixel regions 08, thereby saving space in the display panel 124 and increasing the arrangement density of the sub-pixels 081 in the display panel 124.

[0125] Figure 15This is a partial cross-sectional view of the display panel 124 in an embodiment of this application, as shown below. Figure 8 and Figure 15 As shown, in some embodiments, the display panel 124 includes multiple pixel regions 08, with two isolation structures 070 between adjacent pixel regions 08. The arrangement of the two isolation structures 070 ensures that the charge generation layer 04 forms at least two gaps at the edges of the two isolation structures 070, resulting in better isolation. For example, in some embodiments, if the sub-pixels 081 in adjacent pixel regions 08 have different colors, then the heights of the sub-pixels 081 will be different. This solution allows for the design of isolation structures 070 for sub-pixels 081 of different heights. That is, the isolation structure 070 adjacent to one pixel region 08 is prepared based on the height of the sub-pixels 081 within that pixel region 08; the isolation structure 070 adjacent to another pixel region 08 is also prepared based on the height of the sub-pixels 081 within that pixel region 08, thereby improving the isolation effect. This solution can improve the isolation effect between two pixel regions 08, further reduce crosstalk between adjacent pixel regions 08, and reduce the power consumption of the display panel 124.

[0126] like Figure 15 As shown, in some embodiments, the display panel 124 further includes a pixel define layer 09 (PDL), which is used to isolate and define individual pixel regions 08, ensuring that the light-emitting material is accurately deposited to form the light-emitting layer and avoiding color mixing and light leakage. The pixel define layer 09 can be specifically formed from photoresist or inorganic insulating materials. In some embodiments of this application, the pixel define layer 09 can cover a portion of the two isolation structures 070 between two adjacent pixel regions 08. For example, the pixel define layer 09 covers a portion of one isolation structure 070 facing the other isolation structure 070, and also covers a portion of the other isolation structure 070 facing the first isolation structure 070.

[0127] Please refer to Figure 15In some embodiments, the width of the isolation structure 070 can be 1μm to 10μm. It is understood that the width of the isolation structure 070 is a dimension perpendicular to the extension direction and perpendicular to the thickness direction of the isolation structure 070. In this scheme, the smaller the width of the isolation structure 070, the better, while maintaining reliable shape and size. This reduces the area occupied by the isolation structure 070, increases the sub-pixel 081 arrangement density of the display panel 124, and thus improves the display effect of the display panel 124. For example, if the width of the isolation structure 070 is less than 1μm, it may increase the difficulty of the fabrication process of the isolation structure 070, or cause problems such as deformation of the isolation structure 070. If the width of the isolation structure 070 is greater than 10μm, it may cause the isolation structure 070 to occupy too large an area of ​​the display panel 124, resulting in a decrease in the sub-pixel 081 arrangement density of the display panel 124.

[0128] In some embodiments, the width of the isolation structure 070 is 3μm to 7μm. This isolation structure 070 can effectively reduce the manufacturing process while simultaneously increasing the sub-pixel density of the display panel 124. For example, the width of the isolation structure 070 can be 3.5μm, 4μm, 4.2μm, 4.5μm, 4.8μm, 5μm, 5.5μm, 5.8μm, 6μm, 6.2μm, or 6.5μm, etc.

[0129] In addition, in some embodiments, the distance between two adjacent sub-pixels 081 can be 10μm to 30μm, the distance between two adjacent isolation structures 070 can be 3μm to 20μm, the distance between the isolation structure 070 and the adjacent pixel definition layer is 1μm to 10μm, and the width of the pixel definition layer 09 between the isolation structure 070 and the sub-pixel 081 is 3μm to 20μm.

[0130] Figure 16 This is a partial cross-sectional view of the display panel 124 in an embodiment of this application, as shown below. Figure 16 As shown, in some embodiments, an isolation structure 070 is provided between two adjacent pixel regions 08, and the pixel definition layer 09 may also cover part of the isolation structure 070. In this embodiment, the width of the isolation structure 070 may also be 1μm to 10μm.

[0131] In addition, the width of the pixel definition layer 09 covering part of the isolation structure 070 can be 3μm to 25μm, the distance from the isolation structure 070 to the adjacent and untouched pixel definition layer 09 can be 1μm to 10μm, and the width of the pixel definition layer 09 adjacent to and untouched by the isolation structure 070 can be 3μm to 25μm.

[0132] Figure 17This is a partial cross-sectional view of the display panel 124 in an embodiment of this application, as shown below. Figure 17 As shown, in one embodiment, the pixel definition layer 09 can be made to not cover the isolation structure 070 at all, so that gaps can be generated in the charge generation layer 04 on both sides of the isolation structure 070, causing the charge generation layer 04 to be partially disconnected, thereby improving the isolation effect.

[0133] Based on the same inventive concept, this application also provides a method for manufacturing a display panel 124. This method is used to manufacture the display panel 124 provided in the above embodiments. Figure 18 This is a schematic diagram of a manufacturing process for the display panel 124 in an embodiment of this application, as shown below. Figure 18 As shown, the preparation method includes:

[0134] Step S101: Prepare a hole 003 on the first side surface 001 of the substrate 01;

[0135] The substrate 01 includes a first side surface 001 and a second side surface 002 that are opposite to each other. The substrate has a wiring layer 011 on the second side surface, and one end of the hole 003 extends to the surface of the wiring layer 011.

[0136] Step S102: A first metal layer 004 is prepared on the first side surface 001 of the substrate 01, and a first metal structure 005 is filled in the hole 003. The first metal structure is electrically connected to the wiring layer 011 on the second side surface of the substrate 01.

[0137] Specifically, the first metal layer 004 and the first metal structure 005 can be prepared by deposition.

[0138] Step S103: Prepare the first structural part 071 of the isolation structure 070 on the surface of the first metal layer 004;

[0139] Specifically, the first structural part 071 can also be prepared by deposition.

[0140] Step S104: Pattern the first metal layer 004 to separate the second structural part 072 and the first electrode 02 of the isolation structure 070.

[0141] For example, a planarization layer can be first coated to form a substrate 01. The hole 003 overlapping the first electrode 02 is patterned through exposure and development processes; a first metal layer is deposited; then, the process for the first structural part 071 of the isolation structure 070 is performed: inorganic material is deposited, and the first structural part 071 of the isolation structure 070 is patterned through exposure, development, and etching processes. Next, the patterning process for the first electrode 02 is performed: specifically, the first electrode 02 and the first structural part 071 of the isolation structure 070 can be patterned through exposure, development, and etching processes. Finally, a pixel definition layer process can be performed: a pixel definition layer is coated, and the pixel definition layer is patterned through exposure and development processes.

[0142] In this embodiment, the material of the second structural portion 072 of the isolation structure 070 is the same as the material of the second electrode 06, which simplifies the fabrication process of the isolation structure 070. The display panel fabricated using this method exhibits less crosstalk between sub-pixels, resulting in better display performance and lower power consumption.

[0143] Based on the same inventive concept, this application also provides another method for manufacturing a display panel 124. This method is used to manufacture the display panel 124 provided in the above embodiments. Figure 19 This is a schematic diagram of a manufacturing process for the display panel 124 in an embodiment of this application, as shown below. Figure 19 As shown, the preparation method includes:

[0144] Step S201: Prepare a hole 003 on the first side surface 001 of the substrate 01;

[0145] The substrate 01 includes a first side surface 001 and a second side surface 002 that are opposite to each other. The substrate has a wiring layer 011 on the second side surface, and one end of the hole 003 extends to the surface of the wiring layer 011.

[0146] Step S202: A first electrode 02 is prepared on the first side surface 001 of the substrate 01, and the first electrode 02 is electrically connected to the wiring layer 011 of the second side surface 002 of the substrate 01.

[0147] Specifically, the first electrode 02 can be prepared by deposition.

[0148] Step S203: Prepare a second structural part 072 of the isolation structure 070 on the first side surface 001 of the substrate 01. The second structural part 072 is electrically connected to the wiring layer 011 of the second side surface 002 of the substrate 01.

[0149] Specifically, the second structural part 072 of the above-mentioned isolation structure 070 can be prepared by deposition.

[0150] Step S204: Prepare the first structural part 071 of the isolation structure 070 on the surface of the second structural part 072;

[0151] Specifically, the first structural part 071 can also be prepared by deposition.

[0152] Step S205: Cut the end of the second structural part 072 facing the first structural part 071 to form an isolation groove.

[0153] For example, a planarization layer can be first coated to form a substrate 01. The hole 003 overlapping the first electrode 02 is patterned using exposure and development processes. Then, the first electrode 02 is patterned by depositing a metal layer and using exposure, development, and etching processes. Next, an isolation structure process is performed: the second and first structural portions of the isolation structure are deposited sequentially; the isolation structure is patterned using exposure, development, and etching processes. Finally, a pixel definition layer process can be performed: a pixel definition layer is coated and patterned using exposure and development processes. The isolation structure is then side-etched using a wet etching process to form isolation trenches in the first and second structural portions of the isolation structure.

[0154] In this embodiment, the first electrode 02 and the second structural part 072 of the isolation structure are fabricated separately, which facilitates the design of the specific thickness of the second structural part 072 according to actual needs, providing greater flexibility in selection. Furthermore, the display panel fabricated using this method exhibits less crosstalk between sub-pixels, resulting in better display performance and lower power consumption.

[0155] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display panel, characterized in that, It includes pixel regions and isolation regions, wherein the isolation regions are located between two adjacent pixel regions, wherein: The isolation region includes an isolation structure, a first portion of a first light-emitting layer, a first portion of a charge-generating layer, a first portion of a second light-emitting layer, and a first portion of a second electrode arranged sequentially along a first direction. The pixel region includes a first electrode, a second portion of a first light-emitting layer, a second portion of a charge-generating layer, a second portion of a second light-emitting layer, and a second portion of a second electrode arranged sequentially along the first direction; The first part of the charge generation layer and the second part of the charge generation layer are discontinuous, while the first part of the second electrode and the second part of the second electrode are continuous.

2. The display panel as described in claim 1, characterized in that, The sum of the thickness of the second portion of the first light-emitting layer and the thickness of the second portion of the charge-generating layer, h1, the sum of the thickness of the second portion of the first light-emitting layer, the thickness of the second portion of the charge-generating layer and the thickness of the second portion of the second light-emitting layer, h, and the thickness H of the isolation structure satisfy: h1 < H < h.

3. The display panel as described in claim 1 or 2, characterized in that, The isolation structure includes a first structural portion and a second structural portion; the first structural portion protrudes from a first surface of the second structural portion, the first surface being the connecting surface of the first structural portion and the second structural portion, and the sum of the thickness of the second portion of the first light-emitting layer and the thickness of the second portion of the charge-generating layer, h1, and the thickness H1 of the second structural portion satisfy: h1 < H1.

4. The display panel as described in claim 3, characterized in that, The first structural part is an insulating material layer, and the second structural part includes at least one of metal, inorganic material or organic material.

5. The display panel as described in any one of claims 2 to 4, characterized in that, The second structural part is a metal layer, and the display panel further includes a wiring layer. The second structural part is electrically connected to the wiring layer and to the second part of the charge generation layer.

6. The display panel as described in any one of claims 1 to 5, characterized in that, The isolation structure around one of the pixel regions forms a closed loop, or the isolation structure around one of the pixel regions forms an open loop.

7. The display panel as described in any one of claims 1 to 6, characterized in that, A sub-pixel is formed by the first electrode, the second portion of the first light-emitting layer, the second portion of the charge-generating layer, the second portion of the second light-emitting layer, and the second portion of the second electrode in a pixel region.

8. The display panel as described in claim 7, characterized in that, It includes a plurality of sub-pixels, the plurality of sub-pixels including a first sub-pixel and a second sub-pixel, the thickness of the first sub-pixel being greater than the thickness of the second sub-pixel, and the thickness of the isolation structure located around the first sub-pixel being greater than the thickness of the isolation structure around the second sub-pixel.

9. The display panel as described in claim 7, characterized in that, The system includes multiple sub-pixels, including a first sub-pixel and a second sub-pixel. The thickness of the first sub-pixel is different from that of the second sub-pixel. The thickness of the isolation structure located around the first sub-pixel is the same as that of the isolation structure located around the second sub-pixel. The thickness of the isolation structure is greater than the sum of the thickness of the first light-emitting layer and the thickness of the charge-generating layer of the first sub-pixel, and less than the sum of the thickness of the first light-emitting layer, the thickness of the charge-generating layer, and the thickness of the second light-emitting layer of the first sub-pixel.

10. The display panel according to any one of claims 7 to 9, characterized in that, The pixel unit comprises a plurality of sub-pixels, which together form a plurality of pixel units. The plurality of sub-pixels include red sub-pixels, green sub-pixels, and blue sub-pixels. Each pixel unit comprises one red sub-pixel, one blue sub-pixel, and two green sub-pixels arranged in two rows and two columns. The two green sub-pixels are arranged along one diagonal of the pixel unit.

11. The display panel according to any one of claims 1 to 10, characterized in that, It includes multiple pixel regions, and the isolation structures around the multiple pixel regions are integrally formed to form an isolation net.

12. The display panel as described in any one of claims 1 to 11, characterized in that, It includes multiple pixel regions, and the isolation region between two adjacent pixel regions has two isolation structures.

13. The display panel as described in any one of claims 1 to 12, characterized in that, The width of the isolation structure is 1μm to 10μm.

14. A method for manufacturing a display panel, characterized in that, For manufacturing a display panel as described in any one of claims 1 to 13, comprising: A hole is formed on the first side surface of the substrate; A first metal layer is prepared on the first side surface of the substrate, and a first metal structure is filled in the hole. The first metal layer is electrically connected to the wiring layer on the second side surface of the substrate through the first metal structure. A first structural portion of an isolation structure is fabricated on the surface of the first metal layer; The first metal layer is patterned to separate the second structural part of the isolation structure from the first electrode.

15. A method for manufacturing a display panel, characterized in that, For manufacturing a display panel as described in any one of claims 1 to 13, comprising: A hole is formed on the first side surface of the substrate; A first electrode is fabricated on a first side surface of the substrate, and a second metal structure is filled in a portion of the hole. The first electrode is electrically connected to the wiring layer on the second side surface of the substrate through the second metal structure. A second structural portion of an isolation structure is prepared on the first side surface of the substrate, and a third metal structure is filled in another portion of the hole. The second structural portion is electrically connected to the wiring layer on the second side surface of the substrate through the third metal structure. A first structural portion with an isolation structure is prepared on the surface of the second structural portion; The end of the second structural part facing the first structural part is cut laterally to form an isolation groove.

16. A display device, characterized in that, It includes a cover plate and a display panel as described in any one of claims 1 to 13, wherein the cover plate is disposed on the display side of the display panel.

17. An electronic device, characterized in that, It includes a housing and a display device as described in claim 16, wherein the display device is connected to the housing.

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