Display panel, preparation method thereof and display device

Abstract

The application provides a display panel and a preparation method therefor, and a display device. The display panel comprises a substrate, a pixel definition layer located on one side of the substrate, the pixel definition layer enclosing a plurality of pixel openings, the orthographic projection of the pixel opening on the substrate comprising a first side and a second side, the first side being adjacent to the second side, the length of the first side being less than the length of the second side, an isolation structure located on the side of the pixel definition layer away from the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation openings being in communication with the pixel openings, and the orthographic projection of the pixel opening on the substrate being located within the orthographic projection of the isolation opening on the substrate, and a plurality of light emitting units, at least part of the light emitting units being located within the isolation openings, the light emitting units comprising a light emitting functional layer, the light emitting functional layer comprising a first functional film layer, the first functional film layer being in lapping connection with the isolation structure on the side where the first side is located, and the first functional layer comprising a hole injection layer and / or a hole transport layer. The technical scheme of the application can improve the electric leakage.

Description

Technical Field

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

[0002] With the development of display technology, Organic Light-Emitting Diode (OLED) has become one of the most commonly used displays in electronic devices such as mobile phones, tablets, smart TVs, and wearable devices due to its advantages such as low power consumption, high brightness, wide viewing angle, and high contrast. In the traditional display panel manufacturing process, a fine metal mask (FMM) is typically used to pattern the light-emitting pixels. FMM technology is mature and has extensive mass production experience. However, FMM technology also has limitations such as limited precision, high development costs, and long development cycles. Fine metal mask-less technology eliminates the limitations of traditional OLED processes on display size, resolution, and other screen performance characteristics, offering advantages such as high performance, full-size display, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A describe relevant content regarding the technology of non-fine metal masking, and are provided for reference.

[0003] However, current display panels still have some issues when displaying images. Summary of the Invention

[0004] To address the aforementioned issues, embodiments of this application provide a display panel, a method for manufacturing the same, and a display device.

[0005] In a first aspect, embodiments of this application provide a display panel, comprising: a substrate; a pixel definition layer located on one side of the substrate, the pixel definition layer enclosing a plurality of pixel openings, the orthographic projection of the pixel openings on the substrate including a first side and a second side, the first side being adjacent to the second side and the length of the first side being less than the length of the second side; an isolation structure located on the side of the pixel definition layer away from the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation openings communicating with the pixel openings, and the orthographic projection of the pixel openings on the substrate being located within the orthographic projection of the isolation openings on the substrate; a plurality of light-emitting units, at least a portion of the light-emitting units being located within the isolation openings, the light-emitting units including a light-emitting functional layer, the light-emitting functional layer including a first functional film layer, the first functional film layer overlapping the isolation structure on the side where the first side is located, the first functional film layer including a hole injection layer and / or a hole transport layer.

[0006] In conjunction with the first aspect, the first functional film layer and the isolation structure do not overlap on the side where the second side is located; preferably, along the direction away from the substrate, the light-emitting functional layer includes a first functional film layer, a light-emitting layer, and a second functional film layer; preferably, the first functional film layer includes a hole transport layer, the second functional film layer includes an electron transport layer, and the hole transport layer overlaps with the isolation structure on the side where the first side is located; or, the first functional film layer includes a hole injection layer and a hole transport layer sequentially stacked along the direction away from the substrate, and the second functional film layer includes an electron transport layer and an electron injection layer sequentially stacked along the direction away from the substrate; the hole injection layer overlaps with the isolation structure on the side where the first side is located; preferably, the material of the first functional film layer includes an organic material; preferably, the light-emitting layer overlaps with the isolation structure on the side where the first side is located; and / or, the second functional film layer overlaps with the isolation structure on the side where the first side is located.

[0007] In conjunction with the first aspect, the ratio of the length of the first side to the length of the second side is greater than or equal to 1 / 4 and less than or equal to 3 / 4; preferably, the orthogonal projection of the pixel opening onto the substrate further includes a third side and a fourth side, the third side and the first side being disposed opposite each other along a first direction, the fourth side and the second side being disposed opposite each other along a second direction, and the first direction and the second direction intersecting; preferably, the first functional film layer and the isolation structure do not overlap on the side where the fourth side is located; preferably, the first functional film layer and the isolation structure do not overlap on the side where the third side is located; preferably, the light-emitting layer and the isolation structure do not overlap on the sides where the second side, the third side, and the fourth side are respectively located, or, the light-emitting layer and the isolation structure overlap on at least one of the second side, the third side, and the fourth side; and / or, the second functional film layer The second functional film layer does not overlap with the isolation structure on any of the second, third, and fourth sides; or, the second functional film layer overlaps with the isolation structure on at least one of the second, third, and fourth sides. Preferably, the light-emitting unit further includes a first electrode located on the side of the light-emitting functional layer facing away from the substrate, and the first electrode overlaps with the isolation structure on the first and third sides; or, the first electrode overlaps with the isolation structure on all of the first, second, third, and fourth sides. Preferably, the length of the third side is the same as the length of the first side; and / or, the length of the fourth side is the same as the length of the second side. Preferably, the shape of the orthographic projection of the pixel opening on the substrate is rectangular; preferably, the shape of the orthographic projection of the isolation opening on the substrate is rectangular.

[0008] In conjunction with the first aspect, the isolation structure includes a first part, a second part, and a third part stacked sequentially along a direction away from the substrate, wherein the orthographic projection of the second part on the substrate lies within the orthographic projection of the third part on the substrate, and the orthographic projection of the second part on the substrate lies within the orthographic projection of the first part on the substrate; preferably, the first functional film layer overlaps with the first part on the side where the first side is located; preferably, the material of the first part includes molybdenum; and / or, the material of the second part includes aluminum; and / or, the material of the third part includes titanium.

[0009] In conjunction with the first aspect, the plurality of light-emitting units include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit, and the plurality of pixel openings include a first pixel opening, a second pixel opening, and a third pixel opening. The first pixel opening corresponds to the first light-emitting unit, the second pixel opening corresponds to the second light-emitting unit, and the third pixel opening corresponds to the third light-emitting unit. One first light-emitting unit, two second light-emitting units, and one third light-emitting unit constitute one pixel. Preferably, the first side of the first pixel opening is greater than the sum of the first sides of the two second pixel openings; the sum of the first sides of the two second pixel openings is greater than the first side of the third pixel opening. Preferably, the first light-emitting unit includes a blue light-emitting unit, the second light-emitting unit includes a green light-emitting unit, and the third light-emitting unit includes a red light-emitting unit. Preferably, the second side of the first pixel opening is equal to the second side of the second pixel opening; the second side of the second pixel opening is equal to the second side of the third pixel opening. Preferably, the first light-emitting unit and the third light-emitting unit are arranged alternately along a first direction. Preferably, the second light-emitting unit and the first light-emitting unit or the third light-emitting unit are arranged alternately along a second direction, and the first direction and the second direction intersect.

[0010] In conjunction with the first aspect, the plurality of light-emitting units include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit, and the plurality of pixel openings include a first pixel opening, a second pixel opening, and a third pixel opening. The first pixel opening corresponds to the first light-emitting unit, the second pixel opening corresponds to the second light-emitting unit, and the third pixel opening corresponds to the third light-emitting unit. One first light-emitting unit, one second light-emitting unit, and one third light-emitting unit constitute one pixel. Preferably, the first side of the first pixel opening is larger than the first side of the second pixel opening; the first side of the second pixel opening is larger than the first side of the third pixel opening. Preferably, the first light-emitting unit includes a blue light-emitting unit, the second light-emitting unit includes a green light-emitting unit, and the third light-emitting unit includes a red light-emitting unit. Preferably, the second side of the first pixel opening is equal to the second side of the second pixel opening; the second side of the second pixel opening is equal to the second side of the third pixel opening. Preferably, the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit are arranged alternately along a second direction.

[0011] In conjunction with the first aspect, the light-emitting unit further includes a second electrode located between the substrate and the pixel definition layer, with the pixel opening exposing at least a portion of the second electrode; preferably, the light-emitting unit further includes a first electrode located on the side of the light-emitting functional layer facing away from the substrate, and the display panel further includes a first encapsulation layer located at least on the side of the first electrode facing away from the substrate, the first encapsulation layer including a plurality of spaced-apart encapsulation units corresponding to the light-emitting unit, the orthographic projection of the encapsulation unit on the substrate at least partially overlapping the orthographic projection of the light-emitting unit on the substrate; preferably, the display panel further includes a second encapsulation layer and a third encapsulation layer stacked sequentially along a direction away from the substrate, the second encapsulation layer located on the side of the first encapsulation layer facing away from the substrate; preferably, the materials of the first encapsulation layer and the third encapsulation layer include inorganic materials, and the material of the second encapsulation layer includes organic materials.

[0012] Secondly, embodiments of this application also provide a display panel, including: a substrate; a pixel definition layer located on one side of the substrate, the pixel definition layer enclosing a plurality of pixel openings, the orthographic projection of the pixel openings on the substrate including a first side and a third side disposed opposite to each other along a first direction, and a second side and a fourth side disposed opposite to each other along a second direction, the first direction and the second direction intersecting; wherein, the length of the first side is less than the length of the second side, the first direction corresponds to the scanning direction during vapor deposition, and the second direction corresponds to the vapor deposition source direction during vapor deposition.

[0013] In conjunction with the second aspect, the ratio of the length of the first side to the length of the second side is greater than or equal to 1 / 4 and less than or equal to 3 / 4; preferably, the length of the third side is the same as the length of the first side; and / or, the length of the fourth side is the same as the length of the second side; preferably, the display panel further includes an isolation structure located on the side of the pixel definition layer away from the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation openings communicating with the pixel openings, and the orthographic projection of the pixel openings on the substrate being located within the orthographic projection of the isolation openings on the substrate; the display panel further includes a plurality of light-emitting units, at least a portion of the light-emitting units being located within the isolation openings, the light-emitting units including a light-emitting functional layer, the light-emitting functional layer including a first functional film layer, the first functional film layer overlapping the isolation structure on the side where the first side is located, the first functional film layer including a hole injection layer and / or a hole transport layer.

[0014] Thirdly, embodiments of this application also provide a display panel, comprising: a substrate; a pixel definition layer located on one side of the substrate, the pixel definition layer enclosing a plurality of pixel openings, the plurality of pixel openings including a first pixel opening, a second pixel opening and a third pixel opening; a first side and a third side of the pixel openings projected onto the substrate in a first direction and disposed opposite to each other, and a second side and a fourth side disposed opposite to each other in a second direction, the first direction and the second direction intersecting; a plurality of light-emitting units, at least a portion of the light-emitting units being located within the pixel openings, the plurality of light-emitting units including a first light-emitting unit, a second light-emitting unit and a third light-emitting unit, the first light-emitting unit corresponding to the first pixel opening, the second light-emitting unit corresponding to the second pixel opening, the third light-emitting unit corresponding to the third pixel opening, one first light-emitting unit, two second light-emitting units and one third light-emitting unit constituting one pixel, the length of the first side of the first pixel opening being greater than the sum of the lengths of the first sides of the two second pixel openings, and the sum of the lengths of the first sides of the two second pixel openings being greater than the length of the first side of the third pixel opening.

[0015] In conjunction with the third aspect, the display panel also includes an isolation structure located on the side of the pixel definition layer away from the substrate. The isolation structure encloses multiple isolation openings, which are connected to the pixel openings. The orthographic projection of the pixel openings on the substrate is located within the orthographic projection of the isolation openings on the substrate. The light-emitting unit includes a light-emitting functional layer, which includes a first functional film layer. The first functional film layer overlaps with the isolation structure on the side where the first side is located. The first functional film layer includes a hole injection layer and / or a hole transport layer.

[0016] In conjunction with the third aspect, the first functional film layer and the isolation structure do not overlap on the side where the second side is located; preferably, along the direction away from the substrate, the light-emitting functional layer includes a first functional film layer, a light-emitting layer, and a second functional film layer; preferably, the first functional film layer includes a hole transport layer, the second functional film layer includes an electron transport layer, and the hole transport layer overlaps with the isolation structure on the side where the first side is located; or, the first functional film layer includes a hole injection layer and a hole transport layer stacked sequentially along the direction away from the substrate, and the second functional film layer includes an electron transport layer and an electron injection layer stacked sequentially along the direction away from the substrate; the hole injection layer overlaps with the isolation structure on the side where the first side is located; preferably, the material of the first functional film layer includes an organic material; preferably, the light-emitting layer overlaps with the isolation structure on the side where the first side is located; and / or, the second functional film layer overlaps with the isolation structure on the side where the first side is located.

[0017] In conjunction with the third aspect, the first functional film layer and the isolation structure do not overlap on the side where the fourth side is located; preferably, the first functional film layer and the isolation structure do not overlap on the side where the third side is located; preferably, the light-emitting layer and the isolation structure do not overlap on the sides where the second, third, and fourth sides are located, or the light-emitting layer and the isolation structure overlap on at least one of the second, third, and fourth sides; and / or, the second functional film layer and the isolation structure do not overlap on the sides where the second, third, and fourth sides are located, or the second functional film layer and the isolation structure overlap on at least one of the second, third, and fourth sides; preferably, the light-emitting unit further includes a first electrode located on the side of the light-emitting functional layer facing away from the substrate, and the first electrode overlaps with the isolation structure on the sides where the first and third sides are located; or, the first electrode overlaps with the isolation structure on the sides where the first, second, third, and fourth sides are located.

[0018] In conjunction with the third aspect, the ratio of the length of the first side to the length of the second side is greater than or equal to 1 / 4 and less than or equal to 3 / 4; preferably, the length of the third side is the same as the length of the first side; and / or, the length of the fourth side is the same as the length of the second side; preferably, the shape of the orthographic projection of the pixel opening on the substrate includes a rectangle; preferably, the shape of the orthographic projection of the isolation opening on the substrate includes a rectangle.

[0019] In conjunction with the third aspect, the isolation structure includes a first part, a second part, and a third part stacked sequentially along a direction away from the substrate, wherein the orthographic projection of the second part on the substrate lies within the orthographic projection of the third part on the substrate, and the orthographic projection of the second part on the substrate lies within the orthographic projection of the first part on the substrate; preferably, the first functional film layer overlaps with the first part on the side where the first side is located; preferably, the material of the first part includes molybdenum; and / or, the material of the second part includes aluminum; and / or, the material of the third part includes titanium.

[0020] In conjunction with the third aspect, the light-emitting unit further includes a second electrode located between the substrate and the pixel definition layer, with the pixel opening exposing at least a portion of the second electrode; preferably, the light-emitting unit further includes a first electrode located on the side of the light-emitting functional layer away from the substrate, and the display panel further includes a first encapsulation layer located at least on the side of the first electrode away from the substrate, the first encapsulation layer including a plurality of spaced-apart encapsulation units corresponding to the light-emitting unit, the orthographic projection of the encapsulation unit on the substrate at least partially overlapping the orthographic projection of the light-emitting unit on the substrate; preferably, the display panel further includes a second encapsulation layer and a third encapsulation layer stacked sequentially along a direction away from the substrate, the second encapsulation layer located on the side of the first encapsulation layer away from the substrate; preferably, the materials of the first encapsulation layer and the third encapsulation layer include inorganic materials, and the material of the second encapsulation layer includes organic materials.

[0021] Fourthly, embodiments of this application also provide a method for fabricating a display panel, comprising: fabricating a plurality of second electrodes on a substrate; fabricating a pixel definition layer and an isolation structure on the side of the second electrodes away from the substrate, the pixel definition layer enclosing a plurality of pixel openings, the orthographic projection of the pixel openings on the substrate including a first side and a second side, the first side and the second side being adjacent, the length of the first side being less than the length of the second side; the isolation structure being located on the side of the pixel definition layer away from the substrate, the isolation structure enclosing a plurality of isolation openings, the isolation openings communicating with the pixel openings, and the orthographic projection of the pixel openings on the substrate being located within the orthographic projection of the isolation openings on the substrate, the pixel openings exposing at least a portion of the second electrodes; fabricating at least a portion of a light-emitting unit within at least the isolation openings, the light-emitting unit including a light-emitting functional layer, the light-emitting functional layer including a first functional film layer, the first functional film layer overlapping the isolation structure on the side where the first side is located, the first functional film layer including a hole injection layer and / or a hole transport layer.

[0022] In conjunction with the fourth aspect, the method of fabricating at least a portion of a light-emitting unit within an isolation opening includes: adjusting a first evaporation source so that it is tilted toward a first side; depositing a first functional material within the isolation opening to obtain a first functional film layer; sequentially depositing a light-emitting material and a second functional material within the isolation opening using the first evaporation source to obtain a light-emitting layer and a second functional film layer; depositing a first electrode material within the isolation opening using a second evaporation source to obtain a first electrode; and fabricating a first encapsulation layer on the side of the first electrode facing away from the substrate, the first encapsulation layer including a plurality of spaced-apart encapsulation units corresponding to the light-emitting unit, wherein the orthographic projection of the encapsulation unit on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate; preferably, after the step of fabricating the first encapsulation layer on the side of the first electrode facing away from the substrate, the fabrication method further includes: sequentially fabricating a second encapsulation layer and a third encapsulation layer on the side of the first encapsulation layer facing away from the substrate.

[0023] In conjunction with the fourth aspect, a pixel definition layer and an isolation structure are fabricated on the side of the second electrode away from the substrate, comprising: fabricating a pixel definition material layer on the side of the second electrode away from the substrate; sequentially fabricating a first material layer, a second material layer, and a third material layer on the side of the pixel definition material layer away from the substrate; patterning the first material layer, the second material layer, and the third material layer to obtain a first part, a second part, and a third part, respectively, wherein the first part, the second part, and the third part are sequentially stacked along the direction away from the substrate, and the first part, the second part, and the third part constitute an isolation structure; patterning the exposed pixel definition material layer to obtain a pixel definition layer; preferably, the pixel opening includes a first pixel opening, a second pixel opening, and a third pixel opening, wherein the length of the first side of the first pixel opening is greater than the sum of the lengths of the first sides of the two second pixel openings, and the sum of the lengths of the first sides of the two second pixel openings is greater than the length of the first side of the third pixel opening; or, the length of the first side of the first pixel opening is greater than the length of the second pixel opening. The length of the first side of the opening is greater than the length of the first side of the second pixel opening; preferably, the first pixel opening corresponds to the first light-emitting unit, the second pixel opening corresponds to the second light-emitting unit, and the third pixel opening corresponds to the third light-emitting unit. At least a portion of the light-emitting unit is fabricated within the isolation opening, including: fabricating a first fabrication material layer corresponding to the first light-emitting unit within the isolation opening, retaining the first fabrication material layer corresponding to the first pixel opening, and forming a light-emitting functional layer, a first electrode, and a packaging unit corresponding to the first light-emitting unit; fabricating a second fabrication material layer corresponding to the second light-emitting unit within the isolation opening, retaining the second fabrication material layer corresponding to the second pixel opening, and forming a light-emitting functional layer, a first electrode, and a packaging unit corresponding to the second light-emitting unit; and fabricating a third fabrication material layer corresponding to the third light-emitting unit within the isolation opening, retaining the third fabrication material layer corresponding to the third pixel opening, and forming a light-emitting functional layer, a first electrode, and a packaging unit corresponding to the third light-emitting unit.

[0024] Fifthly, embodiments of this application also provide a display device, including the display panel described above, or including a display panel prepared according to the method described above.

[0025] Through the above technical solution, the first functional membrane layer and the isolation structure overlap on the side where the first side is located. The length of the first side is designed to be less than the length of the second side. In this way, the overlap length between the first functional membrane layer and the isolation structure can be reduced, the overlap area can be reduced, and leakage can be reduced or avoided. Attached Figure Description

[0026] Figure 1 This is a schematic cross-sectional view of a display panel provided in an embodiment of this application.

[0027] Figure 2 This is a cross-sectional structural diagram of a display panel provided in another embodiment of this application.

[0028] Figure 3 This is a top view of the pixel definition layer provided in an embodiment of this application.

[0029] Figure 4 This is a cross-sectional structural diagram of a display panel provided in another embodiment of this application.

[0030] Figure 5 This is a cross-sectional structural diagram of a display panel provided in another embodiment of this application.

[0031] Figure 6 This is a cross-sectional structural diagram of a display panel provided in another embodiment of this application.

[0032] Figure 7 This is a cross-sectional structural diagram of a display panel provided in another embodiment of this application.

[0033] Figure 8a This is a schematic diagram of pixel arrangement provided in an embodiment of this application.

[0034] Figure 8b This is a schematic diagram of pixel arrangement provided in another embodiment of this application.

[0035] Figure 8c This is a schematic diagram of pixel arrangement provided in another embodiment of this application.

[0036] Figure 9 This is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of this application.

[0037] Figure 10 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] When manufacturing a display panel, the functional film layer in the light-emitting unit needs to be formed by vapor deposition. When using a fine metal mask (FMM) to vapor deposit the functional film layer, multiple alignments are required. In order to solve the positional offset caused by alignment error, sufficient space needs to be reserved between different light-emitting units. This results in a low aperture ratio of the light-emitting unit, making it difficult to improve the pixel density of the display panel.

[0040] In this application, no photomask is required; a full-surface vapor deposition process is used to individually vapor-deposit and encapsulate light-emitting units (also known as different sub-pixels) of different colors. Alignment accuracy during vapor deposition is not a concern, allowing for smaller gaps between light-emitting units and thus increasing pixel density. In this method, an isolation structure is placed between adjacent light-emitting units to separate them. However, the inventors discovered that during the vapor deposition of the light-emitting functional layer, some functional film layers overlap with the isolation structure. Current then flows laterally through the light-emitting functional layer (mainly the hole injection layer and hole transport layer), causing lateral leakage and affecting product performance.

[0041] To address the aforementioned technical problems, this application provides a display panel comprising: a substrate, a pixel definition layer, an isolation structure, and a plurality of light-emitting units. The pixel definition layer is located on one side of the substrate, enclosing a plurality of pixel openings. The orthographic projection of each pixel opening onto the substrate includes a first side and a second side, which are adjacent to each other, with the length of the first side being less than the length of the second side. The isolation structure is located on the side of the pixel definition layer opposite to the substrate, enclosing a plurality of isolation openings that communicate with the pixel openings. The orthographic projection of each pixel opening onto the substrate lies within the orthographic projection of the isolation opening onto the substrate. At least a portion of each light-emitting unit is located within an isolation opening. Each light-emitting unit includes a light-emitting functional layer, which includes a first functional film layer. The first functional film layer overlaps with the isolation structure on the side containing the first side. The first functional film layer includes a hole injection layer and / or a hole transport layer. In this application embodiment, the first functional film layer overlaps with the isolation structure on the side containing the first side, and the length of the first side is designed to be less than the length of the second side. This reduces the overlap length and area between the first functional film layer and the isolation structure, thereby reducing or preventing leakage current.

[0042] During their research, the inventors discovered that by limiting the evaporation angle during vapor deposition, the first functional film layer can be prevented from overlapping with the isolation structure in the source direction. However, in the scan direction, at least one side of the first functional film layer overlaps with the isolation structure, leading to leakage. Therefore, in this embodiment, the overlap length on both sides of the scan direction is reduced or limited (i.e., with a fixed pixel area, the length of the first side is reduced and the length of the second side is increased), reducing the overlap area and thus reducing or avoiding leakage.

[0043] Figure 1 This is a schematic cross-sectional view of a display panel provided in an embodiment of this application. Figure 2 This is a cross-sectional structural diagram of a display panel provided in another embodiment of this application. Figure 3 This is a top view of the pixel definition layer provided in an embodiment of this application. It should be noted that... Figure 1This is a schematic diagram of the cross-sectional structure of the display panel along the first direction (i.e., the x-direction). Figure 2 This is a schematic diagram of the cross-sectional structure of the display panel along the second direction (i.e., the y-direction). The first direction corresponds to the scanning direction during vapor deposition, and the second direction corresponds to the vapor deposition source direction. It should be noted that... Figure 1 and Figure 2 The size of pixel opening 201 in the image is for illustrative purposes only and is not drawn to scale. For example... Figures 1 to 3 As shown, the display panel includes a substrate 10, a pixel definition layer 20, an isolation structure 40, and multiple light-emitting units 30.

[0044] In this embodiment, the substrate 10 may include a substrate and a circuit layer (not shown) formed on the substrate. The substrate may be a rigid substrate, such as a glass substrate; or a flexible substrate, such as polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), etc. The circuit layer may include multiple wiring layers and dielectric layers isolating the wiring layers, and pixel circuits may be formed in the circuit layer.

[0045] The pixel definition layer 20 is located on one side of the substrate 10, and the pixel definition layer 20 encloses a plurality of pixel openings 201. For example... Figure 3 As shown, the orthographic projection of the pixel opening 201 onto the substrate 10 includes a first side 2011 and a second side 2012, with the first side 2011 and the second side 2012 adjacent to each other. The length of the first side 2011 is less than the length of the second side 2012. Optionally, the ratio of the length of the first side 2011 to the length of the second side 2012 is greater than or equal to 1 / 4 and less than or equal to 3 / 4. For example, the ratio of the length of the first side 2011 to the length of the second side 2012 is 1 / 4, 1 / 2, or 3 / 4. Figure 3 As shown, the orthographic projection of the pixel opening 201 onto the substrate 10 also includes a third side 2013 and a fourth side 2014, with the third side 2013 and the first side 2011 along a first direction (i.e., Figure 3 The x-direction in the middle is set relative to the second side 2014 and the second side 2012 along the second direction (i.e., the x-direction). Figure 3 The first and second directions are set relative to each other (in the y-direction), and intersect. Optionally, the first direction corresponds to the scanning direction during evaporation, and the second direction corresponds to the evaporation source direction during evaporation. Figure 3In this embodiment, the length of the third side 2013 is the same as the length of the first side 2011; and / or, the length of the fourth side 2014 is the same as the length of the second side 2012. That is, the shape of the orthographic projection of the pixel opening 201 onto the substrate 10 includes a rectangle. It is understood that in other embodiments, the orthographic projection of the pixel opening 201 onto the substrate 10 may also include other shapes, such as a trapezoid, a parallelogram, etc.

[0046] Optionally, such as Figure 1 and Figure 3 As shown, the isolation structure 40 is located on the side of the pixel definition layer 20 facing away from the substrate 10. The isolation structure 40 encloses a plurality of isolation openings 401, which communicate with the pixel openings 201. The orthographic projection of the pixel openings 201 on the substrate 10 lies within the orthographic projection of the isolation openings 401 on the substrate 10. Optionally, as... Figure 1 As shown, the isolation structure 40 includes a first part 410, a second part 420, and a third part 430 sequentially stacked along a direction away from the substrate 10. The orthographic projection of the second part 420 on the substrate 10 lies within the orthographic projection of the first part 410 on the substrate 10. The orthographic projection of the second part 420 on the substrate 10 lies within the orthographic projection of the third part 430 on the substrate 10. That is, the isolation structure 40 has an undercut structure to isolate adjacent light-emitting units 30. Optionally, the shape of the orthographic projection of the isolation opening 401 on the substrate 10 is adapted to the shape of the orthographic projection of the pixel opening 201 on the substrate 10. For example, if the orthographic projection of the pixel opening 201 on the substrate 10 is rectangular, then the orthographic projection of the isolation opening 401 on the substrate 10 is also rectangular. Optionally, the material of the first part 410 includes molybdenum, the material of the second part 420 includes aluminum, and the material of the third part 430 includes titanium.

[0047] At least a portion of the light-emitting unit 30 is located within the isolation opening 401. The light-emitting unit 30 includes a light-emitting functional layer 320. Along the direction away from the substrate 10, the light-emitting functional layer 320 includes a first functional film layer 321, a light-emitting layer 322, and a second functional film layer 323. The first functional film layer 321 overlaps with the isolation structure 40 on the side where the first side 2011 is located. The first functional film layer 321 includes a hole transport layer and / or a hole injection layer. Typically, the material of the first functional film layer 321 (e.g., a hole transport layer or a hole injection layer) includes organic materials. Therefore, current can easily travel laterally within the first functional film layer 321. When the first functional film layer 321 comes into contact with the isolation structure 40, the isolation structure 40 can conduct electricity, thus easily causing leakage. Therefore, it is necessary to reduce the contact length or contact area between the first functional film layer 321 and the isolation structure 40. In this embodiment, the first functional film layer 321 and the isolation structure 40 overlap on the side where the first side 2011 is located, instead of overlapping on the side where the second side 2012 is located, to reduce the overlap length. Specifically, the first functional layer overlaps with the first part 410 on the side where the first side 2011 is located.

[0048] Optionally, the first functional film layer 321 includes a hole transport layer, and the second functional film layer 323 includes an electron transport layer. In this case, the hole transport layer overlaps with the isolation structure 40 on the side where the first side 2011 is located. Alternatively, the first functional film layer 321 includes a hole injection layer and a hole transport layer sequentially stacked along the direction away from the substrate 10, and the second functional film layer 323 includes an electron transport layer and an electron injection layer sequentially stacked along the direction away from the substrate 10. In this case, the hole injection layer overlaps with the isolation structure 40 on the side where the first side 2011 is located.

[0049] In the embodiments of this application, such as Figure 1 and Figure 2 As shown, the first functional film layer 321 and the isolation structure 40 do not overlap on the side where the second side 2012 is located, the first functional film layer 321 and the isolation structure 40 do not overlap on the side where the fourth side 2014 is located, and the first functional film layer 321 and the isolation structure 40 do not overlap on the side where the third side 2013 is located. That is, in this embodiment, the first functional film layer 321 and the isolation structure 40 only overlap on the side where the first side 2011 is located, and the length of the first side 2011 is less than the length of the second side 2012. This reduces the overlap length (or overlap area) between the first functional film layer 321 and the isolation structure 40, reduces leakage current, and thus reduces power consumption and improves display effect.

[0050] exist Figure 1 and Figure 2In this configuration, the light-emitting layer 322 overlaps with the isolation structure 40 on the side where the first side 2011 is located; and / or, the second functional layer overlaps with the isolation structure 40 on the side where the first side 2011 is located. The light-emitting layer 322 does not overlap with the isolation structure 40 on the sides where the second side 2012, third side 2013, and fourth side 2014 are located, and the second functional film layer 323 does not overlap with the isolation structure 40 on the sides where the second side 2012, third side 2013, and fourth side 2014 are located. Since there is no lateral current transmission within the light-emitting layer 322 and the second functional film layer 323, whether the light-emitting layer 322 and the second functional film layer 323 overlap with the isolation structure 40 does not affect leakage current. Optionally, the light-emitting layer 322 and the isolation structure 40 may overlap on at least one of the first side 2011, the second side 2012, the third side 2013, and the fourth side 2014; and / or, the second functional film layer 323 and the isolation structure 40 may overlap on at least one of the first side 2011, the second side 2012, the third side 2013, and the fourth side 2014. Optionally, Figure 4 This is a cross-sectional structural diagram of a display panel provided in another embodiment of this application. Figure 5 This is a cross-sectional structural diagram of a display panel provided in another embodiment of this application. Figure 4 This is a schematic diagram of the cross-sectional structure of the display panel along the first direction. Figure 5 This is a schematic diagram of the cross-sectional structure of the display panel along the second direction. Figure 4 and Figure 5 The display panel shown is Figure 1 and Figure 2 The difference in the display panel shown is that the light-emitting layer 322 and the isolation structure 40 overlap on the side where the first side 2011, the second side 2012, the third side 2013 and the fourth side 2014 are located, and the second functional film layer 323 and the isolation structure 40 overlap on the side where the first side 2011, the second side 2012, the third side 2013 and the fourth side 2014 are located.

[0051] In the above embodiments, the first functional membrane layer 321 and the isolation structure 40 overlap only on the side where the first side 2011 is located. It can be understood that the technical solution of this application can also be applied to the first functional membrane layer 321 and the isolation structure 40 overlapping on the sides where the first side 2011 and the third side 2013 are respectively located. Since the first side 2011 and the third side 2013 have the same length, and the second side 2012 and the fourth side 2014 have the same length, and the first side 2011 is shorter than the second side 2012, the overlap length between the first functional membrane layer 321 and the isolation structure 40 is also relatively small, which can also improve leakage current. Specifically, Figure 6 This is a cross-sectional structural diagram of a display panel provided in another embodiment of this application. Figure 7 This is a cross-sectional structural diagram of a display panel provided in another embodiment of this application. Figure 6 This is a schematic diagram of the cross-sectional structure of the display panel along the first direction. Figure 7 This is a schematic diagram of the cross-sectional structure of the display panel along the second direction. Figure 6 and Figure 7 The display panel shown is Figure 4 and Figure 5 The difference in the display panel shown is that the first functional film layer 321 and the isolation structure 40 also overlap on the side where the third side 2013 is located. That is, the technical solution of this application is applicable to both the case where the first functional film layer 321 and the isolation structure 40 overlap on the side where the first side 2011 is located (i.e., single-sided overlap) and the case where the first functional film layer 321 and the isolation structure 40 overlap on the sides where the first side 2011 and the third side 2013 are respectively located (i.e., double-sided overlap).

[0052] Continue to refer to Figure 1 and Figure 2 The light-emitting unit 30 also includes a first electrode 310 located on the side of the light-emitting functional layer 320 facing away from the substrate 10. The first electrode 310 overlaps with the isolation structure 40 on each of the first side 2011, the second side 2012, the third side 2013, and the fourth side 2014. It is understood that the first electrode 310 may also overlap with a portion of the sidewall of the isolation structure 40. For example, the first electrode 310 overlaps with the isolation structure 40 on each of the first side 2011 and the third side 2013. The impedance requirement can still be met in this case, and this embodiment of the application does not impose any limitations.

[0053] Optionally, the light-emitting unit 30 further includes a second electrode 330 located between the substrate 10 and the pixel definition layer 20, with the pixel opening 201 exposing at least a portion of the second electrode 330.

[0054] Optionally, the display panel further includes a first encapsulation layer 510, which is located at least on the side of the first electrode 310 facing away from the substrate 10. The first encapsulation layer 510 includes a plurality of spaced-apart encapsulation units 511, which correspond to the light-emitting units 30. The orthographic projection of the encapsulation unit 511 on the substrate 10 at least partially overlaps with the orthographic projection of the light-emitting unit 30 on the substrate 10. Optionally, the display panel further includes a second encapsulation layer 520 and a third encapsulation layer 530 sequentially stacked along a direction away from the substrate 10, with the second encapsulation layer 520 located on the side of the first encapsulation layer 510 facing away from the substrate 10. Optionally, the materials of the first encapsulation layer 510 and the third encapsulation layer 530 include inorganic materials, and the material of the second encapsulation layer 520 includes organic materials. It should be noted that only... Figure 1 The diagram shows the second encapsulation layer 520 and the third encapsulation layer 530, which can be understood as follows: Figure 2 , Figures 4 to 7The display panel shown may also include a second encapsulation layer 520 and a third encapsulation layer 530. In other embodiments, the encapsulation layers of the display panel may be... Figure 1 The three-layer encapsulation structure can vary. For example, you can choose two-layer encapsulation, four-layer encapsulation, or five-layer encapsulation, as long as it can achieve the encapsulation effect.

[0055] During their research, the inventors also discovered that the degree of leakage varied depending on the material of the first functional film layer 321 used in the light-emitting units 30 of different colors. Typically, the red light-emitting unit 30 exhibited the highest leakage rate, followed by the green light-emitting unit 30, while the blue light-emitting unit 30 had the lowest leakage rate. Based on these findings, the inventors made improvements to the light-emitting units 30 of different colors.

[0056] In this embodiment, the plurality of light-emitting units 30 include a first light-emitting unit 31, a second light-emitting unit 32, and a third light-emitting unit 33. The plurality of pixel openings 201 include a first pixel opening 201, a second pixel opening 201, and a third pixel opening 201. The first pixel opening 201 corresponds to the first light-emitting unit 31, the second pixel opening 201 corresponds to the second light-emitting unit 32, and the third pixel opening 201 corresponds to the third light-emitting unit 33. Specifically, the first light-emitting unit 31 includes a blue light-emitting unit, the second light-emitting unit 32 includes a green light-emitting unit, and the third light-emitting unit 33 includes a red light-emitting unit. In some cases, such as... Figure 8a As shown in Figure 8b, a pixel is composed of a first light-emitting unit 31, two second light-emitting units 32, and a third light-emitting unit 33. The first light-emitting unit 31 and the third light-emitting unit 33 are arranged alternately along a first direction (i.e., the x-direction), and the second light-emitting units 32 are arranged alternately with either the first light-emitting unit 31 or the third light-emitting unit 33 along a second direction (i.e., the y-direction). In this case, the first side 2011 of the first pixel opening 201 is greater than the sum of the first sides 2011 of the two second pixel openings 201; the sum of the first sides 2011 of the two second pixel openings 201 is greater than the first side 2011 of the third pixel opening 201. In some cases, such as... Figure 8c As shown, a first light-emitting unit 31, a second light-emitting unit 32, and a third light-emitting unit 33 constitute a pixel. The first light-emitting unit 31, the second light-emitting unit 32, and the third light-emitting unit 33 are arranged alternately along the second direction (i.e., the y-direction). At this time, the first side 2011 of the first pixel opening 201 is larger than the first side 2011 of the second pixel opening 201; the first side 2011 of the second pixel opening 201 is larger than the first side 2011 of the third pixel opening 201.

[0057] Since the red light-emitting unit has the most severe leakage current, followed by the green light-emitting unit, and the blue light-emitting unit has the least leakage current, in the design, the first side 2011 of the pixel opening 201 corresponding to the red light-emitting unit is the smallest, the first side 2011 of the pixel opening 201 corresponding to the green light-emitting unit is the next smallest, and the first side 2011 of the pixel opening 201 corresponding to the blue light-emitting unit is the largest. At this time, the leakage current of different colored light-emitting units can be balanced, the leakage current can be improved, and the display effect can be enhanced.

[0058] This application embodiment also provides a display panel, including: a substrate 10 and a pixel definition layer 20. The pixel definition layer 20 is located on one side of the substrate 10, and encloses a plurality of pixel openings 201. The orthographic projection of the pixel openings 201 on the substrate 10 includes a first side 2011 and a second side 2012 disposed opposite to each other along a first direction, and a second side 2012 and a fourth side 2014 disposed opposite to each other along a second direction. The first direction and the second direction intersect. The length of the first side 2011 is less than the length of the second side 2012. The first direction corresponds to the scanning direction during vapor deposition, and the second direction corresponds to the vapor deposition source direction during vapor deposition. In this embodiment, since the first functional film layer 321 overlaps with the isolation structure 40 in the first direction, the length of the first side 2011 (or the third side 2013) that is arranged opposite to each other in the first direction is designed to be less than the length of the second side 2012 (or the fourth side 2014). This can reduce the overlap length or overlap area between the first functional film layer 321 and the isolation structure 40, thereby reducing or avoiding leakage current, and thus reducing power consumption and improving display effect.

[0059] The ratio of the length of the first side 2011 to the length of the second side 2012 is greater than or equal to 1 / 4 and less than or equal to 3 / 4;

[0060] Preferably, the length of the third side 2013 is the same as the length of the first side 2011; and / or, the length of the fourth side 2014 is the same as the length of the second side 2012;

[0061] Preferably, the display panel further includes an isolation structure 40 located on the side of the pixel definition layer 20 facing away from the substrate 10. The isolation structure 40 encloses a plurality of isolation openings 401, which communicate with the pixel openings 201. The orthographic projection of the pixel openings 201 on the substrate 10 is located within the orthographic projection of the isolation openings 401 on the substrate 10. The display panel further includes a plurality of light-emitting units 30, at least a portion of which is located within the isolation openings 401. Each light-emitting unit 30 includes a light-emitting functional layer 320, which includes a first functional film layer 321. The first functional film layer 321 overlaps with the isolation structure 40 on the side where the first side 2011 is located. The first functional film layer 321 includes a hole injection layer and / or a hole transport layer.

[0062] The embodiments of this application may be combined with some or all of the features in the above embodiments, which will not be repeated here.

[0063] This application embodiment also provides a display panel, including: a substrate 10, a pixel definition layer 20, and a plurality of light-emitting units 30. The pixel definition layer 20 is located on one side of the substrate 10, and encloses a plurality of pixel openings 201, including a first pixel opening 201, a second pixel opening 201, and a third pixel opening 201. The orthographic projections of the pixel openings 201 onto the substrate 10 have a first side 2011 and a third side 2013 oppositely disposed along a first direction, and a second side 2012 and a fourth side 2014 oppositely disposed along a second direction, the first and second directions intersecting. The plurality of light-emitting units 30 have at least a portion located within the pixel openings 201, and the plurality of light-emitting units 30 include a first light-emitting unit 31. The second light-emitting unit 32 and the third light-emitting unit 33 are used. The first light-emitting unit 31 corresponds to the first pixel opening 201, the second light-emitting unit 32 corresponds to the second pixel opening 201, and the third light-emitting unit 33 corresponds to the third pixel opening 201. One first light-emitting unit 31, two second light-emitting units 32, and one third light-emitting unit 33 constitute one pixel. The length of the first side 2011 of the first pixel opening 201 is greater than the sum of the lengths of the first sides 2011 of the two second pixel openings 201, and the sum of the lengths of the first sides 2011 of the two second pixel openings 201 is greater than the length of the first side 2011 of the third pixel opening 201. In this embodiment, the leakage of different color light-emitting units can be balanced, leakage can be improved, and the display effect can be enhanced.

[0064] The embodiments of this application may be combined with some or all of the features in the above embodiments, which will not be repeated here.

[0065] This application also provides a method for fabricating a display panel, comprising: fabricating a plurality of second electrodes on a substrate; fabricating a pixel definition layer and an isolation structure on the side of the second electrodes away from the substrate, wherein the pixel definition layer encloses a plurality of pixel openings, the orthographic projection of the pixel openings on the substrate includes a first side and a second side, the first side and the second side are adjacent, and the length of the first side is less than the length of the second side; the isolation structure is located on the side of the pixel definition layer away from the substrate, the isolation structure encloses a plurality of isolation openings, the isolation openings are connected to the pixel openings, and the orthographic projection of the pixel openings on the substrate is located within the orthographic projection of the isolation openings on the substrate, the pixel openings exposing at least a portion of the second electrodes; fabricating at least a portion of a light-emitting unit within at least the isolation openings, the light-emitting unit including a light-emitting functional layer, the light-emitting functional layer including a first functional film layer, the first functional film layer overlapping the isolation structure on the side where the first side is located, the first functional film layer including a hole injection layer and / or a hole transport layer. In this application embodiment, the length of the first side is designed to be less than the length of the second side, thereby reducing the overlap length between the first functional film layer and the isolation structure, reducing the overlap area, and thus reducing or avoiding leakage current.

[0066] Figure 9 This is a schematic flowchart illustrating a method for manufacturing a display panel according to an embodiment of this application. Figure 9 As shown, the method includes the following steps.

[0067] Step S910: A plurality of second electrodes are fabricated on the substrate.

[0068] In step S920, a pixel definition layer and an isolation structure are prepared on the side of the second electrode away from the substrate.

[0069] Optionally, the fabrication method includes: fabricating a pixel definition material layer on the side of the second electrode away from the substrate; sequentially fabricating a first material layer, a second material layer, and a third material layer on the side of the pixel definition material layer away from the substrate; patterning the first material layer, the second material layer, and the third material layer to obtain a first part, a second part, and a third part, respectively, wherein the first part, the second part, and the third part are sequentially stacked along the direction away from the substrate, and the first part, the second part, and the third part constitute an isolation structure; and patterning the exposed pixel definition material layer to obtain a pixel definition layer.

[0070] Optionally, the pixel defining layer encloses a plurality of pixel openings, which expose at least a portion of the second electrode. The orthographic projection of the pixel opening onto the substrate includes a first side and a second side, which are adjacent to each other, and the length of the first side is less than the length of the second side. An isolation structure is located on the side of the pixel defining layer opposite to the substrate, and the isolation structure encloses a plurality of isolation openings, which communicate with the pixel openings, and the orthographic projection of the pixel opening onto the substrate lies within the orthographic projection of the isolation opening onto the substrate.

[0071] Step S930: Prepare at least a portion of the light-emitting unit within the isolation opening.

[0072] In this embodiment, the light-emitting unit includes a light-emitting functional layer, which includes a first functional film layer. The first functional film layer overlaps with the isolation structure on the side where the first side is located. The first functional film layer includes a hole injection layer and / or a hole transport layer.

[0073] Optionally, at least a portion of the light-emitting unit is prepared within the isolation opening, including: adjusting a first evaporation source so that the first evaporation source is tilted toward a first side, evaporating a first functional material within the isolation opening to obtain a first functional film layer; sequentially evaporating a light-emitting material and a second functional material within the isolation opening using the first evaporation source to obtain a light-emitting layer and a second functional film layer; evaporating a first electrode material within the isolation opening using a second evaporation source to obtain a first electrode; and preparing a first encapsulation layer on the side of the first electrode away from the substrate, the first encapsulation layer including a plurality of spaced-apart encapsulation units, the encapsulation units corresponding to the light-emitting units, and the orthographic projection of the encapsulation units on the substrate at least partially overlapping the orthographic projection of the light-emitting units on the substrate.

[0074] Optionally, after preparing the first encapsulation layer, the preparation method further includes: sequentially preparing a second encapsulation layer and a third encapsulation layer on the side of the first encapsulation layer away from the substrate.

[0075] Optionally, the pixel opening includes a first pixel opening, a second pixel opening, and a third pixel opening, wherein the first pixel opening corresponds to a first light-emitting unit, the second pixel opening corresponds to a second light-emitting unit, and the third pixel opening corresponds to a third light-emitting unit. Optionally, the length of the first side of the first pixel opening is greater than the sum of the lengths of the first sides of the two second pixel openings; the sum of the lengths of the first sides of the two second pixel openings is greater than the length of the first side of the third pixel opening. That is, corresponding to Figure 8a Or the structure shown in 8b. Optionally, the length of the first side of the first pixel opening is greater than the length of the first side of the second pixel opening, and the length of the first side of the second pixel opening is greater than the length of the first side of the third pixel opening. That is, corresponding to Figure 8c The structure shown.

[0076] It should be noted that the light-emitting functional layers of different colors are fabricated step by step. Therefore, fabricating at least a portion of the light-emitting unit within the isolation opening includes: fabricating a first fabrication material layer corresponding to the first light-emitting unit within the isolation opening, retaining the first fabrication material layer corresponding to the first pixel opening, forming the light-emitting functional layer, first electrode, and encapsulation unit corresponding to the first light-emitting unit; fabricating a second fabrication material layer corresponding to the second light-emitting unit within the isolation opening, retaining the second fabrication material layer corresponding to the second pixel opening, forming the light-emitting functional layer, first electrode, and encapsulation unit corresponding to the second light-emitting unit; and fabricating a third fabrication material layer corresponding to the third light-emitting unit within the isolation opening, retaining the third fabrication material layer corresponding to the third pixel opening, forming the light-emitting functional layer, first electrode, and encapsulation unit corresponding to the third light-emitting unit. It should be noted that the first fabrication material layer includes a first functional material, a light-emitting material, and a second functional material corresponding to the first light-emitting unit, as well as a first electrode material and a first encapsulation layer. The second fabrication material layer includes a first functional material, a light-emitting material, and a second functional material corresponding to the second light-emitting unit, as well as a first electrode material and a first encapsulation layer. The third fabrication material layer includes a first functional material, a light-emitting material, and a second functional material corresponding to the third light-emitting unit, as well as a first electrode material and a first encapsulation layer.

[0077] This application also provides a display device, which includes the display panel described in the above embodiments.

[0078] Figure 10 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Figure 10 As shown, display device 1000 is a product with image display function. For example, display device 1000 can be used to display static images, such as pictures or photographs. Display device 1000 can also be used to display moving images, such as videos.

[0079] Display device 1000 can be a laptop, mobile phone, handheld or portable computer, camera, camcorder, in-vehicle smart central control screen, calculator, smartwatch, GPS navigator, electronic photo, electronic billboard or sign, projector, etc.

[0080] The display device 1000 includes the display panel provided in any of the above embodiments. The display panel may be an organic light-emitting diode display panel or a quantum dot electroluminescent display panel.

[0081] In addition, the display device 1000 can also perform functions such as taking photos, recording videos, fingerprint recognition, and facial recognition. Accordingly, the display device 1000 also includes at least one functional module for implementing the above functions, such as an under-display camera or an under-display fingerprint recognition sensor.

[0082] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0083] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0084] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0085] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0086] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

[0087] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A display panel, characterized in that, include: substrate; A pixel definition layer is located on one side of the substrate. The pixel definition layer encloses a plurality of pixel openings. The orthographic projection of the pixel openings on the substrate includes a first side and a second side. The first side is adjacent to the second side, and the length of the first side is less than the length of the second side. An isolation structure is located on the side of the pixel definition layer opposite to the substrate. The isolation structure encloses a plurality of isolation openings. The isolation openings are connected to the pixel openings, and the orthographic projection of the pixel openings on the substrate is located within the orthographic projection of the isolation openings on the substrate. A plurality of light-emitting units, at least a portion of which are located within the isolation opening, each light-emitting unit comprising a light-emitting functional layer, the light-emitting functional layer comprising a first functional film layer, the first functional film layer overlapping the isolation structure on the side containing the first edge, the first functional film layer comprising a hole injection layer and / or a hole transport layer.

2. The display panel according to claim 1, characterized in that, The first functional membrane layer and the isolation structure do not overlap on the side where the second side is located; Preferably, along the direction away from the substrate, the light-emitting functional layer includes a first functional film layer, a light-emitting layer, and a second functional film layer; Preferably, the first functional film layer includes a hole transport layer, and the second functional film layer includes an electron transport layer, wherein the hole transport layer overlaps with the isolation structure on the side where the first edge is located; or, the first functional film layer includes a hole injection layer and a hole transport layer sequentially stacked along a direction away from the substrate, and the second functional film layer includes an electron transport layer and an electron injection layer sequentially stacked along a direction away from the substrate; wherein the hole injection layer overlaps with the isolation structure on the side where the first edge is located. Preferably, the material of the first functional membrane layer includes organic materials; Preferably, the light-emitting layer and the isolation structure overlap on the side where the first edge is located; And / or, the second functional membrane layer overlaps with the isolation structure on the side where the first side is located.

3. The display panel according to claim 2, characterized in that, The ratio of the length of the first side to the length of the second side is greater than or equal to 1 / 4 and less than or equal to 3 / 4; Preferably, the orthographic projection of the pixel opening on the substrate further includes a third side and a fourth side, the third side and the first side being disposed opposite to each other along a first direction, the fourth side and the second side being disposed opposite to each other along a second direction, and the first direction and the second direction intersecting; Preferably, the first functional membrane layer and the isolation structure do not overlap on the side where the fourth side is located; Preferably, the first functional membrane layer and the isolation structure do not overlap on the side where the third side is located; Preferably, the light-emitting layer and the isolation structure do not overlap on any of the second, third, and fourth sides; or, the light-emitting layer and the isolation structure overlap on at least one of the second, third, and fourth sides. And / or, the second functional film layer does not overlap with the isolation structure on any of the sides of the second side, the third side, and the fourth side; or, the second functional film layer overlaps with the isolation structure on at least one of the sides of the second side, the third side, and the fourth side. Preferably, the light-emitting unit further includes a first electrode located on the side of the light-emitting functional layer opposite to the substrate, wherein the first electrode overlaps with the isolation structure on the respective sides of the first side and the third side; or, the first electrode overlaps with the isolation structure on the respective sides of the first side, the second side, the third side and the fourth side. Preferably, the length of the third side is the same as the length of the first side; and / or, the length of the fourth side is the same as the length of the second side; Preferably, the shape of the orthographic projection of the pixel opening onto the substrate includes a rectangle; Preferably, the shape of the orthographic projection of the isolation opening onto the substrate includes a rectangle.

4. The display panel according to claim 1, characterized in that, The isolation structure includes a first part, a second part, and a third part that are stacked sequentially along a direction away from the substrate. The orthographic projection of the second part on the substrate is located within the orthographic projection of the third part on the substrate, and the orthographic projection of the second part on the substrate is located within the orthographic projection of the first part on the substrate. Preferably, the first functional film layer overlaps with the first part on the side where the first edge is located; Preferably, the material of the first part includes molybdenum; and / or, the material of the second part includes aluminum; and / or, the material of the third part includes titanium.

5. The display panel according to claim 1, characterized in that, The plurality of light-emitting units include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit. The plurality of pixel openings include a first pixel opening, a second pixel opening, and a third pixel opening. The first pixel opening corresponds to the first light-emitting unit, the second pixel opening corresponds to the second light-emitting unit, and the third pixel opening corresponds to the third light-emitting unit. One first light-emitting unit, two second light-emitting units, and one third light-emitting unit constitute one pixel. Preferably, the first side of the first pixel opening is greater than the sum of the first sides of the two second pixel openings; the sum of the first sides of the two second pixel openings is greater than the first side of the third pixel opening. Preferably, the first light-emitting unit includes a blue light-emitting unit, the second light-emitting unit includes a green light-emitting unit, and the third light-emitting unit includes a red light-emitting unit; Preferably, the second side of the first pixel opening is equal to the second side of the second pixel opening; The second side of the second pixel opening is equal to the second side of the third pixel opening; Preferably, the first light-emitting unit and the third light-emitting unit are arranged alternately along the first direction; Preferably, the second light-emitting unit and the first light-emitting unit or the third light-emitting unit are arranged alternately along the second direction, and the first direction and the second direction intersect.

6. The display panel according to claim 1, characterized in that, The plurality of light-emitting units include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit. The plurality of pixel openings include a first pixel opening, a second pixel opening, and a third pixel opening. The first pixel opening corresponds to the first light-emitting unit, the second pixel opening corresponds to the second light-emitting unit, and the third pixel opening corresponds to the third light-emitting unit. One first light-emitting unit, one second light-emitting unit, and one third light-emitting unit constitute one pixel. Preferably, the first side of the first pixel opening is larger than the first side of the second pixel opening; the first side of the second pixel opening is larger than the first side of the third pixel opening; Preferably, the first light-emitting unit includes a blue light-emitting unit, the second light-emitting unit includes a green light-emitting unit, and the third light-emitting unit includes a red light-emitting unit; Preferably, the second side of the first pixel opening is equal to the second side of the second pixel opening; The second side of the second pixel opening is equal to the second side of the third pixel opening; Preferably, the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit are arranged alternately along the second direction.

7. The display panel according to claim 1, characterized in that, The light-emitting unit further includes a second electrode located between the substrate and the pixel definition layer, and the pixel opening exposes at least a portion of the second electrode; Preferably, the light-emitting unit further includes a first electrode located on the side of the light-emitting functional layer opposite to the substrate, and the display panel further includes a first encapsulation layer. The first encapsulation layer is located at least on the side of the first electrode opposite to the substrate. The first encapsulation layer includes a plurality of encapsulation units spaced apart. The encapsulation units correspond to the light-emitting units, and the orthographic projection of the encapsulation unit on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate. Preferably, the display panel further includes a second encapsulation layer and a third encapsulation layer stacked sequentially along a direction away from the substrate, wherein the second encapsulation layer is located on the side of the first encapsulation layer opposite to the substrate; Preferably, the materials of the first encapsulation layer and the third encapsulation layer include inorganic materials, and the material of the second encapsulation layer includes organic materials.

8. A display panel, characterized in that, include: substrate; A pixel definition layer is located on one side of the substrate. The pixel definition layer encloses a plurality of pixel openings. The orthographic projection of the pixel openings on the substrate includes a first side and a third side that are arranged opposite to each other along a first direction, and a second side and a fourth side that are arranged opposite to each other along a second direction. The first direction and the second direction intersect. Wherein, the length of the first side is less than the length of the second side, the first direction corresponds to the scanning direction during vapor deposition, and the second direction corresponds to the vapor deposition source direction during vapor deposition.

9. The display panel according to claim 8, characterized in that, The ratio of the length of the first side to the length of the second side is greater than or equal to 1 / 4 and less than or equal to 3 / 4; Preferably, the length of the third side is the same as the length of the first side; and / or, the length of the fourth side is the same as the length of the second side; Preferably, the display panel further includes an isolation structure located on the side of the pixel definition layer opposite to the substrate. The isolation structure encloses a plurality of isolation openings, which communicate with the pixel openings. The orthographic projection of the pixel openings on the substrate is located within the orthographic projection of the isolation openings on the substrate. The display panel further includes a plurality of light-emitting units, at least a portion of which are located within the isolation openings. Each light-emitting unit includes a light-emitting functional layer, which includes a first functional film layer. The first functional film layer overlaps with the isolation structure on the side where the first side is located. The first functional film layer includes a hole injection layer and / or a hole transport layer.

10. A display panel, characterized in that, include: substrate; A pixel definition layer is located on one side of the substrate, and the pixel definition layer encloses a plurality of pixel openings, the plurality of pixel openings including a first pixel opening, a second pixel opening and a third pixel opening; The pixel opening's orthogonal projection on the substrate is a first side and a third side that are opposite each other along a first direction, and a second side and a fourth side that are opposite each other along a second direction, wherein the first direction and the second direction intersect. A plurality of light-emitting units are provided, at least a portion of which are located within the pixel opening. The plurality of light-emitting units include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit. The first light-emitting unit corresponds to the first pixel opening, the second light-emitting unit corresponds to the second pixel opening, and the third light-emitting unit corresponds to the third pixel opening. One first light-emitting unit, two second light-emitting units, and one third light-emitting unit constitute one pixel. The length of the first side of the first pixel opening is greater than the sum of the lengths of the first sides of the two second pixel openings, and the sum of the lengths of the first sides of the two second pixel openings is greater than the length of the first side of the third pixel opening.

11. The display panel according to claim 10, characterized in that, It also includes an isolation structure located on the side of the pixel definition layer away from the substrate. The isolation structure encloses a plurality of isolation openings, which are connected to the pixel openings. The orthographic projection of the pixel openings on the substrate is located within the orthographic projection of the isolation openings on the substrate. The light-emitting unit includes a light-emitting functional layer, which includes a first functional film layer. The first functional film layer overlaps with the isolation structure on the side where the first side is located. The first functional film layer includes a hole injection layer and / or a hole transport layer.

12. The display panel according to claim 11, characterized in that, The first functional membrane layer and the isolation structure do not overlap on the side where the second side is located; Preferably, along the direction away from the substrate, the light-emitting functional layer includes a first functional film layer, a light-emitting layer, and a second functional film layer; Preferably, the first functional film layer includes a hole transport layer, and the second functional film layer includes an electron transport layer, wherein the hole transport layer overlaps with the isolation structure on the side where the first edge is located; or, the first functional film layer includes a hole injection layer and a hole transport layer sequentially stacked along a direction away from the substrate, and the second functional film layer includes an electron transport layer and an electron injection layer sequentially stacked along a direction away from the substrate; wherein the hole injection layer overlaps with the isolation structure on the side where the first edge is located. Preferably, the material of the first functional membrane layer includes organic materials; Preferably, the light-emitting layer and the isolation structure overlap on the side where the first edge is located; And / or, the second functional membrane layer overlaps with the isolation structure on the side where the first side is located.

13. The display panel according to claim 12, characterized in that, The first functional membrane layer and the isolation structure do not overlap on the side where the fourth side is located; Preferably, the first functional membrane layer and the isolation structure do not overlap on the side where the third side is located; Preferably, the light-emitting layer and the isolation structure do not overlap on any of the second, third, and fourth sides; or, the light-emitting layer and the isolation structure overlap on at least one of the second, third, and fourth sides. And / or, the second functional film layer does not overlap with the isolation structure on any of the sides of the second side, the third side, and the fourth side; or, the second functional film layer overlaps with the isolation structure on at least one of the sides of the second side, the third side, and the fourth side. Preferably, the light-emitting unit further includes a first electrode located on the side of the light-emitting functional layer opposite to the substrate, wherein the first electrode overlaps with the isolation structure on the respective sides of the first side and the third side; or, the first electrode overlaps with the isolation structure on the respective sides of the first side, the second side, the third side and the fourth side.

14. The display panel according to claim 11, characterized in that, The ratio of the length of the first side to the length of the second side is greater than or equal to 1 / 4 and less than or equal to 3 / 4; Preferably, the length of the third side is the same as the length of the first side; and / or, the length of the fourth side is the same as the length of the second side; Preferably, the shape of the orthographic projection of the pixel opening onto the substrate includes a rectangle; Preferably, the shape of the orthographic projection of the isolation opening onto the substrate includes a rectangle.

15. The display panel according to claim 11, characterized in that, The isolation structure includes a first part, a second part, and a third part that are stacked sequentially along a direction away from the substrate. The orthographic projection of the second part on the substrate is located within the orthographic projection of the third part on the substrate, and the orthographic projection of the second part on the substrate is located within the orthographic projection of the first part on the substrate. Preferably, the first functional film layer overlaps with the first part on the side where the first edge is located; Preferably, the material of the first part includes molybdenum; and / or, the material of the second part includes aluminum; and / or, the material of the third part includes titanium.

16. The display panel according to claim 11, characterized in that, The light-emitting unit further includes a second electrode located between the substrate and the pixel definition layer, and the pixel opening exposes at least a portion of the second electrode; Preferably, the light-emitting unit further includes a first electrode located on the side of the light-emitting functional layer opposite to the substrate, and the display panel further includes a first encapsulation layer. The first encapsulation layer is located at least on the side of the first electrode opposite to the substrate. The first encapsulation layer includes a plurality of encapsulation units spaced apart. The encapsulation units correspond to the light-emitting units, and the orthographic projection of the encapsulation unit on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate. Preferably, the display panel further includes a second encapsulation layer and a third encapsulation layer stacked sequentially along a direction away from the substrate, wherein the second encapsulation layer is located on the side of the first encapsulation layer opposite to the substrate; Preferably, the materials of the first encapsulation layer and the third encapsulation layer include inorganic materials, and the material of the second encapsulation layer includes organic materials.

17. A method for manufacturing a display panel, characterized in that, include: Multiple second electrodes are fabricated on a substrate; A pixel definition layer and an isolation structure are prepared on the side of the second electrode away from the substrate. The pixel definition layer encloses a plurality of pixel openings. The orthogonal projection of the pixel openings on the substrate includes a first side and a second side. The first side and the second side are adjacent to each other. The length of the first side is less than the length of the second side. The isolation structure is located on the side of the pixel definition layer opposite to the substrate. The isolation structure encloses a plurality of isolation openings. The isolation openings are in communication with the pixel openings. The orthographic projection of the pixel openings on the substrate is located within the orthographic projection of the isolation openings on the substrate. The pixel openings expose at least a portion of the second electrode. At least a portion of a light-emitting unit is prepared within the isolation opening. The light-emitting unit includes a light-emitting functional layer, which includes a first functional film layer. The first functional film layer overlaps with the isolation structure on the side where the first edge is located. The first functional film layer includes a hole injection layer and / or a hole transport layer.

18. The method for manufacturing a display panel according to claim 17, characterized in that, The fabrication of at least a portion of the light-emitting unit within the isolation opening includes: Adjust the first vapor deposition source so that it is tilted toward the first side, and vapor deposit the first functional material in the isolation opening to obtain the first functional film layer. Using the first evaporation source, a light-emitting material and a second functional material are sequentially deposited within the isolation opening to obtain a light-emitting layer and a second functional film layer; using the second evaporation source, a first electrode material is deposited within the isolation opening to obtain a first electrode; A first encapsulation layer is prepared on the side of the first electrode away from the substrate. The first encapsulation layer includes a plurality of encapsulation units arranged at intervals. The encapsulation units correspond to the light-emitting units. The orthographic projection of the encapsulation units on the substrate at least partially overlaps with the orthographic projection of the light-emitting units on the substrate. Preferably, after the step of preparing the first encapsulation layer on the side of the first electrode away from the substrate, the preparation method further includes: sequentially preparing a second encapsulation layer and a third encapsulation layer on the side of the first encapsulation layer away from the substrate.

19. The method for manufacturing a display panel according to claim 17, characterized in that, The step of fabricating a pixel definition layer and isolation structure on the side of the second electrode away from the substrate includes: A pixel definition material layer is prepared on the side of the second electrode opposite to the substrate; A first material layer, a second material layer, and a third material layer are sequentially fabricated on the side of the pixel definition layer material layer facing away from the substrate. The first material layer, the second material layer, and the third material layer are patterned to obtain a first part, a second part, and a third part, respectively. The first part, the second part, and the third part are stacked sequentially along the direction away from the substrate, and the first part, the second part, and the third part constitute the isolation structure. The exposed pixel definition material layer is patterned to obtain the pixel definition layer; Preferably, the pixel opening includes a first pixel opening, a second pixel opening, and a third pixel opening, wherein the length of the first side of the first pixel opening is greater than the sum of the lengths of the first sides of the two second pixel openings, and the sum of the lengths of the first sides of the two second pixel openings is greater than the length of the first side of the third pixel opening; or, the length of the first side of the first pixel opening is greater than the length of the first side of the second pixel opening, and the length of the first side of the second pixel opening is greater than the length of the first side of the third pixel opening. Preferably, the first pixel opening corresponds to a first light-emitting unit, the second pixel opening corresponds to a second light-emitting unit, and the third pixel opening corresponds to a third light-emitting unit. The step of fabricating at least a portion of the light-emitting unit within the isolation opening includes: fabricating a first fabrication material layer corresponding to the first light-emitting unit within the isolation opening, retaining the first fabrication material layer corresponding to the first pixel opening, and forming a light-emitting functional layer, a first electrode, and a packaging unit corresponding to the first light-emitting unit; fabricating a second fabrication material layer corresponding to the second light-emitting unit within the isolation opening, retaining the second fabrication material layer corresponding to the second pixel opening, and forming a light-emitting functional layer, a first electrode, and a packaging unit corresponding to the second light-emitting unit; and fabricating a third fabrication material layer corresponding to the third light-emitting unit within the isolation opening, retaining the third fabrication material layer corresponding to the third pixel opening, and forming a light-emitting functional layer, a first electrode, and a packaging unit corresponding to the third light-emitting unit.

20. A display device, characterized in that, It includes the display panel according to any one of claims 1 to 16, or the display panel prepared by the method according to any one of claims 17 to 19.

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