Display panel, its manufacturing method and display device

Abstract

This application provides a display panel, its fabrication method, and a display device. The display panel includes: a substrate; a pixel defining layer located on one side of the substrate, the pixel defining layer having multiple pixel openings and at least one auxiliary opening, the auxiliary opening being located in a first display area; and multiple light-emitting unit groups, each light-emitting unit group including multiple light-emitting devices, the light-emitting devices being at least partially located in the pixel openings, and the auxiliary openings being located between adjacent light-emitting devices. Providing auxiliary openings in the first display area helps to increase the area of ​​the openings of the pixel defining layer in the first display area projected onto the substrate, thereby reducing the difference in the area of ​​the openings of the pixel defining layer projected onto the substrate between the first and second display areas. When an etching method is used to create the openings in the pixel defining layer, the difference in etching rates between the openings in the first and second display areas is smaller, which helps to improve the manufacturing yield of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to display panels, their manufacturing methods, and display devices. Background Technology

[0002] With the development of display technology, Organic Light Emitting Diode (OLED) display products have gained a significant share of the high-end display market in recent years due to their excellent picture quality and wide range of applications. OLED display panels are widely used because of their advantages such as thinness, flexibility, high contrast, and wide color gamut.

[0003] In traditional display panel manufacturing, 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 suffers from limitations in 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 aspects, offering advantages such as high performance, full-size display, and agile delivery. Patents CN118251982A, CN116648095A, CN117062489A, CN118742138A, CN118678783A, CN118660598A, CN118675450A, CN118824188A, and CN118781966A describe relevant content regarding fine metal mask-less technology and are provided for reference.

[0004] Currently, in OLED display panels, including those with under-display cameras (UDC), the area where the under-display camera is located is typically improved by reducing the light-emitting area of ​​the light-emitting unit. However, due to limitations in related technologies, current OLED display panels still cannot fully meet the requirements. Summary of the Invention

[0005] In view of this, embodiments of this application provide a display panel, a method for manufacturing the same, and a display device.

[0006] The first aspect of this application provides a display panel, which includes a first display area and a second display area, wherein the light transmittance of the first display area is greater than that of the second display area;

[0007] The display panel includes:

[0008] substrate;

[0009] A pixel defining layer is located on one side of the substrate. The pixel defining layer has multiple pixel openings and at least one auxiliary opening, with the auxiliary opening located in the first display area.

[0010] Multiple light-emitting unit groups, each light-emitting unit group including multiple light-emitting devices, wherein the light-emitting devices are at least partially located in the pixel openings and the auxiliary openings are located between adjacent light-emitting devices.

[0011] In one embodiment, the plurality of pixel openings includes a plurality of first pixel openings and a plurality of second pixel openings, wherein the plurality of first pixel openings are located in a first display area and the plurality of second pixel openings are located in a second display area;

[0012] The projected area of ​​the first pixel opening on the substrate is smaller than the projected area of ​​the second pixel opening on the substrate.

[0013] The aperture density of the first pixel in the first display area is less than the aperture density of the second pixel in the second display area;

[0014] Preferably, the ratio of the sum of the areas of the orthographic projections of the plurality of first pixel openings and the plurality of auxiliary openings on the substrate to the area of ​​the orthographic projection of the first display area on the substrate is the first opening density, and the ratio of the sum of the areas of the orthographic projections of the plurality of second pixel openings on the substrate to the area of ​​the orthographic projection of the second display area on the substrate is the second opening density, and the first opening density is 80% to 120% of the second opening density.

[0015] Preferably, the density of the first opening is 90% to 110% of the density of the second opening;

[0016] Preferably, the first opening density is 100% of the second opening density;

[0017] Preferably, the second display area includes a sub-region with the same area as the first display area. The sub-region is located in any area of ​​the second display area. The sum of the areas of the orthogonal projection areas of the plurality of first pixel openings and the plurality of auxiliary openings in the first display area on the substrate is 80% to 120% of the orthogonal projection area of ​​the second pixel openings in the sub-region on the substrate.

[0018] Preferably, the number of second pixel openings in the sub-region is greater than the number of first pixel openings in the first display area.

[0019] In one embodiment, in the first display area, at least one auxiliary opening is provided in the space enclosed by multiple light-emitting devices in at least one light-emitting unit group;

[0020] Preferably, there is at least one auxiliary opening between adjacent light-emitting devices;

[0021] Preferably, the areas of the orthographic projections of the multiple auxiliary openings on the substrate are the same.

[0022] In one embodiment, the shape of the orthographic projection of the auxiliary opening onto the substrate includes at least one of a circle, a rectangle, a cross, an X-shape, and a triangle;

[0023] Preferably, the area of ​​the auxiliary opening and the area of ​​the pixel opening projected onto the substrate are the same;

[0024] Preferably, the projected area of ​​the first pixel opening of the same emission color on the substrate is smaller than the projected area of ​​the corresponding second pixel opening on the substrate.

[0025] Preferably, the orthographic projection shape of the first pixel opening located in the first display area on the substrate is the same as the orthographic projection shape of the second pixel opening on the substrate.

[0026] In one embodiment, it further includes: an isolation structure located on the side of the pixel defining layer away from the substrate, the isolation structure enclosing a plurality of isolation openings, the orthographic projection of the pixel openings on the substrate being within the orthographic projection range of the isolation openings on the substrate;

[0027] Preferably, at least a portion of the light-emitting device is located in the connected isolation opening and pixel opening.

[0028] In one embodiment, the isolation structure includes a first part and a second part stacked together, the first part being located on the side of the second part away from the substrate, and the orthographic projection of the first part on the substrate covering the orthographic projection of the second part on the substrate.

[0029] Preferably, the isolation structure further includes a third part located on the side of the second part closer to the substrate, wherein the orthographic projection of the second part on the substrate is within the orthographic projection range of the third part on the substrate.

[0030] In one embodiment, the plurality of pixel openings includes a plurality of first pixel openings located in the first display area;

[0031] The multiple isolation openings include a first isolation opening, which is located in the first display area, and the orthographic projection of the first pixel opening on the substrate is located within the orthographic projection range of the first isolation opening on the substrate; the isolation structure includes multiple spaced-apart first isolation portions, which enclose the first isolation opening.

[0032] Preferably, there is at least one auxiliary opening between adjacent first isolation sections;

[0033] Preferably, the orthographic projection of the first isolation portion on the substrate and the orthographic projection of the auxiliary opening on the substrate do not overlap;

[0034] Preferably, the isolation structure includes a second isolation section located in the second display area. The second isolation section is mesh-like and encloses a plurality of second isolation openings.

[0035] The first isolation section and the second isolation section are electrically connected.

[0036] In one embodiment, the light-emitting device includes a first electrode layer, a light-emitting functional layer, and a second electrode layer stacked sequentially. The first electrode layer is located between the pixel defining layer and the substrate, and the first electrode layer is at least partially exposed to the pixel opening. The light-emitting functional layer and the second electrode layer are located in the connected pixel opening and the isolation opening.

[0037] Preferably, the light-emitting device includes a first light-emitting sub-device located in a first display area and a second light-emitting sub-device located in a second display area, wherein the area of ​​the first electrode layer of the first light-emitting sub-device projected onto the substrate is smaller than the area of ​​the first electrode layer of the second light-emitting sub-device projected onto the substrate.

[0038] Preferably, the orthographic projection of the auxiliary opening on the substrate is spaced apart from the orthographic projection of the first electrode layer of the first light-emitting device on the substrate.

[0039] In one embodiment, the orthogonal projection of the light-emitting functional layer on the substrate is located within the orthogonal projection range of the second electrode layer on the substrate;

[0040] Preferably, the light-emitting functional layer and the isolation structure are spaced apart, and the second electrode layer overlaps with the isolation structure.

[0041] In one embodiment, the system further includes: a first encapsulation layer located on the side of the second electrode layer away from the substrate, the first encapsulation layer including a plurality of encapsulation portions, the orthographic projection of the encapsulation portions on the substrate covering the orthographic projection of the second electrode layer on the substrate.

[0042] A second aspect of this application provides a display panel, which includes a first display area and a second display area, wherein the light transmittance of the first display area is greater than that of the second display area;

[0043] The display panel includes:

[0044] substrate;

[0045] A pixel defining layer is located on one side of the substrate, and the pixel defining layer has at least one auxiliary opening located in the first display area;

[0046] An isolation structure is located on the side of the pixel defining layer away from the substrate, and includes multiple isolation openings, including a first isolation opening located in the first display area. The isolation structure includes multiple spaced-apart first isolation portions, the first isolation portions surrounding the first isolation openings, and the first isolation openings being used to accommodate light-emitting devices.

[0047] The auxiliary opening is located between adjacent first isolation sections.

[0048] In one embodiment, the plurality of pixel openings includes a plurality of first pixel openings and a plurality of second pixel openings, wherein the plurality of first pixel openings are located in a first display area and the plurality of second pixel openings are located in a second display area;

[0049] The projected area of ​​the first pixel opening on the substrate is smaller than the projected area of ​​the second pixel opening on the substrate.

[0050] The aperture density of the first pixel in the first display area is less than the aperture density of the second pixel in the second display area;

[0051] Preferably, the ratio of the sum of the areas of the orthographic projections of the plurality of first pixel openings and the plurality of auxiliary openings on the substrate to the area of ​​the orthographic projection of the first display area on the substrate is the first opening density, and the ratio of the sum of the areas of the orthographic projections of the plurality of second pixel openings on the substrate to the area of ​​the orthographic projection of the second display area on the substrate is the second opening density, and the first opening density is 80% to 120% of the second opening density.

[0052] Preferably, the density of the first opening is 90% to 110% of the density of the second opening;

[0053] Preferably, the first opening density is 100% of the second opening density;

[0054] Preferably, the second display area includes a sub-region with the same area as the first display area. The sub-region is located in any area of ​​the second display area. The sum of the areas of the orthogonal projection areas of the plurality of first pixel openings and the plurality of auxiliary openings in the first display area on the substrate is 80% to 120% of the orthogonal projection area of ​​the second pixel openings in the sub-region on the substrate.

[0055] Preferably, the number of second pixel openings in the sub-region is greater than the number of first pixel openings in the first display area.

[0056] In one embodiment, at least one auxiliary opening is provided between adjacent first isolation sections;

[0057] Preferably, the areas of the orthographic projections of the multiple auxiliary openings on the substrate are the same.

[0058] In one embodiment, the shape of the orthographic projection of the auxiliary opening onto the substrate includes at least one of a circle, a rectangle, a cross, an X-shape, and a triangle;

[0059] Preferably, the area of ​​the auxiliary opening and the area of ​​the pixel opening projected onto the substrate are the same;

[0060] Preferably, the projected area of ​​the first pixel opening of the same emission color on the substrate is smaller than the projected area of ​​the corresponding second pixel opening on the substrate.

[0061] Preferably, the orthographic projection shape of the first pixel opening located in the first display area on the substrate is the same as the orthographic projection shape of the second pixel opening on the substrate.

[0062] A third aspect of this application provides a method for manufacturing a display panel, comprising:

[0063] Provide a substrate;

[0064] A first electrode layer is prepared on one side of the substrate;

[0065] A pixel defining material layer is prepared on the side of the first electrode layer away from the substrate;

[0066] A pixel-defining layer is obtained by forming multiple pixel openings and at least one auxiliary opening in a pixel-defining material layer, wherein the auxiliary opening is located in the first display area;

[0067] A light-emitting functional layer and a second electrode layer are sequentially fabricated in the pixel aperture to form a light-emitting device.

[0068] In one embodiment, after the step of fabricating a pixel defining material layer on the side of the first electrode layer facing away from the substrate, and before the step of forming a plurality of pixel openings and at least one auxiliary opening in the pixel defining material layer, the method further includes:

[0069] An isolation structure with multiple isolation openings is fabricated on the side of the pixel defining material layer away from the substrate;

[0070] Preferably, the step of fabricating an isolation structure with multiple isolation openings on the side of the pixel defining material layer facing away from the substrate includes:

[0071] A second isolation material layer and a first isolation material layer are sequentially fabricated on the side of the pixel defining material layer facing away from the substrate; the first and second isolation material layers are patterned to obtain multiple isolation openings and a first part and a second part stacked together, wherein the first part is located on the side of the second part facing away from 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; or...

[0072] A third isolation material layer, a second isolation material layer, and a first isolation material layer are sequentially prepared on the side of the pixel defining material layer away from the substrate. The first isolation material layer, the second isolation material layer, and the third isolation material layer are patterned to obtain multiple isolation openings and a first part, a second part, and a third part stacked sequentially. The first part is located on the side of the second part away from the substrate. The orthographic projection of the second part on the substrate is within the orthographic projection range of the first part on the substrate. The orthographic projection of the second part on the substrate is within the orthographic projection range of the third part on the substrate.

[0073] In one embodiment, the step of creating a plurality of pixel openings and at least one auxiliary opening in the pixel defining material layer includes:

[0074] A patterned photoresist is fabricated on the side of the isolation structure away from the substrate; the photoresist exposes part of the pixel defining material layer, and the orthographic projection of the photoresist on the substrate covers the orthographic projection of the isolation structure on the substrate;

[0075] The pixel-defining material layer is etched to obtain the pixel-defining layer.

[0076] Preferably, the etching process for the pixel-defining material layer includes dry etching.

[0077] A fourth aspect of this application provides a display device, including the aforementioned display panel, or including a display panel prepared by the aforementioned preparation method.

[0078] According to the embodiment of this application, an auxiliary opening is provided in the first display area, which helps to increase the area of ​​the opening of the pixel defining layer in the first display area projected onto the substrate. This helps to reduce the difference in the area of ​​the opening of the pixel defining layer in the first display area and the second display area projected onto the substrate. When the opening is made in the pixel defining layer by etching, the difference in etching rate between the opening in the first display area and the second display area will be smaller, which helps to improve the manufacturing yield of the display panel. At the same time, the setting of the auxiliary opening also helps to improve the light transmittance of the first display area and improve the display quality of the display panel. Attached Figure Description

[0079] Figure 1 This is a schematic cross-sectional view of the display panel in one embodiment of this application.

[0080] Figure 2 This is a top view of the display panel in one embodiment of this application.

[0081] Figure 3 This is a top view of the display panel in another embodiment of this application.

[0082] Figure 4 This is a top view of the display panel in another embodiment of this application.

[0083] Figure 5 This is a top view of the display panel in another embodiment of this application.

[0084] Figure 6 This is a top view of the display panel in another embodiment of this application.

[0085] Figure 7 This is a top view of the display panel in another embodiment of this application.

[0086] Figure 8 This is a top view of the display panel in another embodiment of this application.

[0087] Figure 9 This is a top view of the display panel in another embodiment of this application.

[0088] Figure 10 This is a schematic cross-sectional view of the display panel in another embodiment of this application.

[0089] Figure 11 This is a cross-sectional structural diagram of the isolation structure in one embodiment of this application.

[0090] Figure 12 This is a cross-sectional structural diagram of the isolation structure in another embodiment of this application.

[0091] Figure 13 This is a cross-sectional structural diagram of the isolation structure in another embodiment of this application.

[0092] Figure 14 This is a top view of the display panel in another embodiment of this application.

[0093] Figure 15 This is a schematic cross-sectional view of the display panel in another embodiment of this application.

[0094] Figure 16 This is a schematic cross-sectional view of the display panel in another embodiment of this application.

[0095] Figure 17 This is a schematic diagram of the process for manufacturing a display panel in one embodiment of this application.

[0096] Figures 18 to 19 This is a schematic diagram illustrating the process of creating multiple pixel openings and at least one auxiliary opening in a pixel-defining material layer in one embodiment of this application. Detailed Implementation

[0097] 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.

[0098] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods and means well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0099] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0100] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0101] The first aspect of this application provides a display panel, as shown in the reference... Figure 1 The schematic diagram of the cross-sectional structure of the display panel shown is as follows: Figure 2 The diagram shows a top view of the display panel. The display panel includes a first display area 10 and a second display area 20. The light transmittance of the first display area 10 is greater than that of the second display area 20. The display panel includes: a substrate 100; a pixel defining layer 200 located on one side of the substrate 100, the pixel defining layer 200 having a plurality of pixel openings 210 and at least one auxiliary opening 220, the auxiliary opening 220 being located in the first display area 10; and a plurality of light-emitting unit groups 300, each light-emitting unit group 300 including a plurality of light-emitting devices 310, the light-emitting devices 310 being at least partially located in the pixel openings 210, and the auxiliary openings 220 being located between adjacent light-emitting devices 310.

[0102] According to the display panel provided in the embodiments of this application, an auxiliary opening 220 is provided in the first display area 10, which is beneficial to increase the area of ​​the opening of the pixel defining layer 200 in the first display area 10 projected onto the substrate 100, thereby reducing the area difference between the openings of the pixel defining layer 200 in the first display area 10 and the second display area 20 projected onto the substrate. When the opening is made in the pixel defining layer 200 by etching, the difference in etching rate between the openings in the first display area 10 and the second display area 20 will be smaller, which is beneficial to improving the manufacturing yield of the display panel. At the same time, the setting of the auxiliary opening 220 is also beneficial to improving the light transmittance of the first display area 10 and improving the display quality of the display panel.

[0103] For example, the first display area 10 can be the under-display camera (UDC) area, and the second display area 20 can be the normal display area.

[0104] For example, the size of the pixel opening 210 in the UDC region is smaller than the size of the pixel opening 210 in the normal display area; moreover, the UDC region has higher light transmittance, and the density of the pixel opening 210 in the UDC region is lower than the density of the pixel opening 210 in the normal display area. It is understood that the density of the pixel opening 210 in the UDC region refers to the ratio of the area of ​​the pixel opening 210 projected orthographically onto the substrate 100 in the UDC region to the area of ​​the UDC region projected orthographically onto the substrate 100; the density of the pixel opening 210 in the normal display area refers to the ratio of the area of ​​the pixel opening 210 projected orthographically onto the substrate 100 in the normal display area to the area of ​​the normal display area projected orthographically onto the substrate 100.

[0105] In one embodiment, refer to Figure 1 The light-emitting device 310 includes a first electrode layer 311, a light-emitting functional layer 312, and a second electrode layer 313 stacked sequentially. The first electrode layer 311 is located between the pixel defining layer 200 and the substrate 100, and the first electrode layer 311 is at least partially exposed to the pixel opening 210.

[0106] It is understood that one of the first electrode layer 311 and the second electrode layer 313 is an anode, and the other of the first electrode layer 311 and the second electrode layer 313 is a cathode. Exemplarily, the light-emitting functional layer 312 includes an emitting layer (EML), and may further include at least one of a hole injection layer (HIL), a hole transport layer (HTL), and an electron-blocking layer (EBL) located between the anode and the emitting layer (EML), and at least one of an electron injection layer (EIL), an electron transport layer (ETL), and a hole-blocking layer (HBL) located between the cathode and the emitting layer (EML).

[0107] For example, during the fabrication of the pixel defining layer 200, a pixel defining material layer is first prepared on one side of the substrate 100, and then a pixel opening 210 is formed in the pixel defining material layer, such that the pixel opening 210 exposes at least a portion of the first electrode layer 311. It is understandable that, due to the high light transmittance of the first display area 10, the size of the pixel opening 210 of the first display area 10 is smaller than the size of the pixel opening 210 in the second display area 20. In the prior art, directly using an etching process (such as dry etching) to etch the pixel defining material layer will result in different etching rates for the pixel opening 210 of the first display area 10 and the second display area 20. Specifically, the etching rate of the first display area 10 is faster, while the etching rate of the second display area 20 is slower. The pixel opening 210 of the second display area 20 has not yet exposed the first electrode layer 311, while the first display area 10 has already experienced over-etching, resulting in partial etching of the first electrode layer 311. If the damage to the first electrode layer 311 is too great, the flatness of the first electrode layer 311 will deteriorate or the work function will be affected, thereby affecting the luminous efficiency of the light-emitting device 310, and consequently reducing the yield of the display panel manufacturing. Furthermore, during the etching process of the pixel defining material layer to obtain the pixel openings 210, a certain over-etching amount is set to ensure that all pixel openings 210 can expose a portion of the first electrode layer 311; otherwise, a portion of the first electrode layer 311 cannot be exposed, and the light-emitting device 310 cannot be lit. The inventors of this application have discovered that the etching rate in a dry etching process is strongly correlated with the pattern density (the number of patterns per unit area) (generally, the smaller the pattern area etched within the same area, the faster the etching rate). Since the density of pixel openings 210 in the UDC region is usually less than that in the normal display area (main screen area), or the size of pixel openings 210 in the UDC region is usually smaller than that in the normal display area (main screen area), the etching rates of pixel openings 210 in the UDC region and the normal display area differ; specifically, the etching rate in the UDC region is faster. Therefore, in this embodiment, at least one auxiliary opening 220 is provided in the UDC region to increase the opening density in the UDC region and reduce the difference in etching rates between the UDC region and the normal display area.

[0108] In one embodiment, refer to Figure 2The plurality of pixel openings 210 include a plurality of first pixel openings 211 and a plurality of second pixel openings 212. The plurality of first pixel openings 211 are located in the first display area 10, and the plurality of second pixel openings 212 are located in the second display area 20. The orthographic projection area of ​​the first pixel opening 211 on the substrate 100 is smaller than the orthographic projection area of ​​the second pixel opening 212 on the substrate 100. The density of the first pixel openings 211 in the first display area 10 is smaller than the density of the second pixel openings 212 in the second display area 20. It should be noted that the density of the first pixel openings 211 refers to the ratio of the area of ​​the orthographic projection of the first pixel opening 211 on the substrate 100 to the area of ​​the orthographic projection of the first display area 10 on the substrate 100; the density of the second pixel openings 212 refers to the ratio of the area of ​​the orthographic projection of the second pixel opening 212 on the substrate 100 to the area of ​​the orthographic projection of the second display area 20 on the substrate 100.

[0109] In one embodiment, the ratio of the sum of the areas of the orthographic projections of the plurality of first pixel openings 210 and the plurality of auxiliary openings 220 on the substrate 100 to the area of ​​the orthographic projection of the first display area 10 on the substrate 100 is the first opening density, and the ratio of the sum of the areas of the orthographic projections of the plurality of second pixel openings 212 on the substrate 100 to the area of ​​the orthographic projection of the second display area 20 on the substrate 100 is the second opening density. The first opening density is 80% to 120% of the second opening density, for example, it can be 80%, 85%, 90%, 95%, 100%, 105%, 110%, 115%, or 120%, etc. Therefore, the difference between the first aperture density and the second aperture density is appropriate. When the pixel aperture 210 and the auxiliary aperture 220 are prepared by etching process, the etching rates of the first display area 10 and the second display area 20 are not much different, which will hardly cause damage to the first electrode layer 311 or greatly alleviate the damage to the first electrode layer 311. Almost all pixel apertures 210 will expose part of the first electrode layer 311, and the flatness of the first electrode layer 311 of the first display area 10 or the second display area 20 is high, the work function is hardly affected, and the luminous efficiency of the light-emitting device 310 is hardly affected, thereby improving the manufacturing yield of the display panel.

[0110] It should be noted that, Figure 2 In the top view, since pixel opening 210, first pixel opening 211 and second pixel opening 212 are located below the second electrode layer 313, they cannot be directly shown and are drawn with dashed lines. It should be noted that the dashed pixel opening 210, first pixel opening 211 and second pixel opening 212 located in the second electrode layer 313 are only used to explain this application and should not be construed as limiting this application.

[0111] In a preferred embodiment, the first aperture density is 90% to 110% of the second aperture density. This results in a smaller difference between the first and second aperture densities, leading to a more significant improvement in the display panel manufacturing yield. In a more preferred embodiment, the first aperture density is 100% of the second aperture density. This further reduces the difference between the first and second aperture densities, further improving the display panel manufacturing yield.

[0112] In one embodiment, refer to Figure 3 The schematic diagram of the top view of the display panel shown illustrates that the second display area 20 includes a sub-region 21 with the same area as the first display area 10. The sub-region 21 is located in any area of ​​the second display area 20. The sum of the projected areas of the plurality of first pixel openings 211 and the plurality of auxiliary openings 220 in the first display area 10 onto the substrate 100 is 80% to 120% of the projected area of ​​the second pixel openings 212 in the sub-region 21 onto the substrate 100. For example, it can be 80%, 85%, 90%, 95%, 100%, 105%, 110%, 115%, or 120%. Therefore, when the pixel openings 210 and auxiliary openings 220 are prepared by etching, the etching rates of the first display area 10 and the second display area 20 are not significantly different, resulting in almost no damage to the first electrode layer 311 or greatly mitigating the damage to the first electrode layer 311, thereby improving the manufacturing yield of the display panel.

[0113] In one embodiment, the number of second pixel openings 212 in sub-region 21 is greater than the number of first pixel openings 211 in first display area 10.

[0114] It should be noted that, Figure 3 In the diagram, sub-region 21 is divided by dashed lines. In reality, sub-region 21 may or may not have a border. Figure 3 This is only used to illustrate sub-region 21 and should not be construed as a limitation of this application. Furthermore, Figure 3 In the diagram, the enlarged structural schematic of the first display area 10 is located to the right of the top view of the display panel, and the enlarged structural schematic of the sub-area 21 is located to the left of the top view of the display panel. The two enlarged structural schematics are used to illustrate the first display area 10 and the sub-area 21, and should not be construed as limiting the present application.

[0115] In one embodiment, refer to Figure 1 In the first display area 10, at least one auxiliary opening 220 is provided in the space enclosed by a plurality of light-emitting devices 310 in at least one light-emitting unit group 300.

[0116] In one embodiment, refer to Figure 4The schematic diagram of the display panel shown in the top view shows that at least one auxiliary opening 220 is provided between adjacent light-emitting devices 310. This facilitates increasing the opening area of ​​the auxiliary opening 220. For example, there is one auxiliary opening 220 between adjacent light-emitting devices 310.

[0117] It is understandable that, since the arrangement of the light-emitting devices 310 in the light-emitting unit group 300 is regular, the auxiliary openings 220 between adjacent light-emitting devices 310 are also regular, which makes it easier to manufacture the auxiliary openings 220 and reduces the manufacturing difficulty.

[0118] For example, refer to Figure 5 The schematic diagram of the top view of the display panel shown shows two auxiliary openings 220 between adjacent light-emitting devices 310. This facilitates further increasing the opening area of ​​the auxiliary openings 220.

[0119] It is understood that among the multiple light-emitting devices 310 in the same light-emitting unit group 300, there are one or two auxiliary openings 220 between any two adjacent light-emitting devices 310.

[0120] It is understandable that there are multiple light-emitting unit groups 300, and in any light-emitting unit group, there are one or two auxiliary openings 220 between any two adjacent light-emitting devices 310. The arrangement of the auxiliary openings 220 in the space enclosed by all the light-emitting unit groups 300 is consistent. This not only increases the opening density of the pixel defining layer 200 in the first display area 10, but also helps to improve the light transmittance of the first display area 10, improve the display quality of the display panel, and also helps to reduce the manufacturing difficulty of the display panel.

[0121] In one embodiment, the shape of the orthographic projection of the auxiliary opening 220 onto the substrate 100 includes a circle.

[0122] (Refer to Figure 1 ), rectangle (see details) Figure 6 ), cross shape (see details) Figure 7 ), X-shaped (please refer to Figure 8 ) and triangles (see details) Figure 9 At least one of the following. It is understood that in the first display area 10, the orthographic projection of the pixel opening 210 onto the substrate 100 is generally circular or rectangular (e.g., it can be a rectangle or a square, etc.). When the orthographic projection of the auxiliary opening 220 onto the substrate 100 is circular, the gap between the pixel opening 210 and the auxiliary opening 220 is relatively large. Other shapes of auxiliary opening 220 can be used, such as rectangular, cross-shaped, X-shaped and triangular, etc., which is beneficial to increase the size of the auxiliary opening 220 and thus increase the area of ​​the auxiliary opening 220.

[0123] Depending on the arrangement of the pixel openings 210 in the first display area 10, the shapes of the auxiliary openings 220 at different positions can be the same or different. They can be specifically set according to the distance between adjacent pixel openings 210 to ensure that the opening area of ​​the first display area 10 matches the opening area of ​​the second display area 20.

[0124] In one embodiment, the orthographic projections of the plurality of auxiliary openings 220 onto the substrate 100 have the same shape. This facilitates the fabrication of the auxiliary openings 220 and reduces the manufacturing difficulty of the display panel.

[0125] In one embodiment, the areas of the orthographic projections of the multiple auxiliary openings 220 onto the substrate 100 are the same. This facilitates the fabrication of the auxiliary openings 220 and reduces the manufacturing difficulty of the display panel.

[0126] In one embodiment, the projected area of ​​the first pixel opening 211 of the same emitting color on the substrate 100 is smaller than the projected area of ​​the corresponding second pixel opening 212 on the substrate 100; the projected shape of the first pixel opening 211 located in the first display area 10 on the substrate 100 is the same as the projected shape of the second pixel opening 212 on the substrate 100. Therefore, the light transmittance of the first display area 10 is greater than that of the second display area 20, and it is beneficial to the fabrication of the pixel opening 210.

[0127] In one embodiment, the auxiliary opening 220 and the pixel opening 210 have the same projected area on the substrate 100. For example, the auxiliary opening 220 and the first pixel opening 211 have the same projected area on the substrate 100, thereby facilitating further improvement in the etching uniformity of the first display area 10. In one embodiment, referring to... Figure 10 The schematic diagram of the cross-sectional structure of the display panel shown indicates that the display panel also includes an isolation structure 400 located on the side of the pixel defining layer 200 facing away from the substrate 100. The isolation structure 400 encloses a plurality of isolation openings 410, and the orthographic projection of the pixel openings 210 on the substrate 100 is within the orthographic projection range of the isolation openings 410 on the substrate 100. The isolation structure 400 is advantageous for isolating subsequent film layers, such as the light-emitting functional layer 312 and the second electrode layer 313 of the light-emitting device 310. A high-precision light-emitting device 310 can be fabricated without using a photomask, which helps reduce the manufacturing difficulty of the display panel, lowers the manufacturing cost, and improves the pixel manufacturing accuracy of the display panel.

[0128] In one embodiment, at least a portion of the light-emitting device 310 is located in the connected isolation opening 410 and pixel opening 210.

[0129] In one embodiment, refer to Figure 11 and Figure 12The schematic cross-sectional view of the isolation structure shown illustrates that the isolation structure 400 includes a first part 401 and a second part 402 stacked together. The first part 401 is located on the side of the second part 402 facing away from the substrate 100, and the orthographic projection of the second part 402 onto the substrate 100 lies within the orthographic projection of the first part 401 onto the substrate 100. For example, the second part 402 can be designed as an independent film layer, meaning there is no physical interface within the second part 402, and all parts are made of the same material, such as aluminum. Alternatively, the second part 402 can be designed as being composed of at least two stacked film layers. For example, the second part 402 can be formed by stacking two conductive film layers, the materials of which can be molybdenum and aluminum, respectively, with the molybdenum conductive film layer located between the substrate 100 and the aluminum conductive film layer. For example, the second part 402 may include a conductive sub-part, or the second part 402 itself may be a conductive structure. The second part 402 overlaps with the second electrode layer 313 of the light-emitting device 310, so that the second electrode layers 313 of adjacent light-emitting devices 310 are electrically connected to each other, thereby realizing a full-surface cathode. The material of the first part 401 can be an organic material, an inorganic material, or a metallic material. If the first part 401 is a metallic material, the material of the second part 402 can be titanium. In this case, the cross-section of the isolation structure 400 is T-shaped or inverted trapezoidal.

[0130] In one embodiment, refer to Figure 13 The schematic diagram of the cross-sectional structure of the isolation structure shown indicates that the isolation structure 400 also includes a third part 403, located on the side of the second part 402 near the substrate 100. The orthographic projection of the second part 402 on the substrate 100 is within the orthographic projection range of the third part 403 on the substrate 100. The second electrode layer 313 can be effectively overlapped with the third part 403 and / or the second part 402, thereby facilitating the realization of a full-surface cathode.

[0131] It is understood that the above-described structure of the isolation structure 400 can effectively isolate the light-emitting functional layer 312 and the second electrode layer 313. For example, when the light-emitting functional layer 312 is prepared by vapor deposition, the isolation structure 400 can effectively isolate the vapor-deposited light-emitting functional material layer to obtain the light-emitting functional layer 312 located in the isolation opening 410. A high-precision light-emitting functional layer 312 can be obtained without the use of a mask, thereby improving the yield of the display panel and reducing production costs.

[0132] In one embodiment, refer to Figure 14The schematic diagram of the top view of the display panel shown includes multiple pixel openings 210, including multiple first pixel openings 211, located in the first display area 10; multiple isolation openings 410, including first isolation openings 411, located in the first display area 10, with the orthographic projection of the first pixel openings 211 onto the substrate 100 within the orthographic projection range of the first isolation openings 411 onto the substrate 100; and an isolation structure 400 including multiple spaced-apart first isolation portions 412, which enclose the first isolation openings 411. Thus, the spaced-apart first isolation portions 412 enclosing the first isolation openings 411 helps to improve the light transmittance of the first display area 10.

[0133] In one embodiment, refer to Figure 14 The auxiliary opening 220 is located between the adjacent first isolation section 412.

[0134] For example, there is at least one auxiliary opening 220 between adjacent first isolation sections 412.

[0135] For example, there is one or two auxiliary openings 220 between adjacent first isolation sections 412.

[0136] In one embodiment, the orthographic projection of the first isolation portion 412 on the substrate 100 does not overlap with the orthographic projection of the auxiliary opening 220 on the substrate 100.

[0137] In one embodiment, refer to Figure 14 The isolation structure 400 includes a second isolation section 413 located in the second display area 20. The second isolation section 413 is mesh-like and encloses a plurality of second isolation openings 414. The first isolation section 412 is electrically connected to the second isolation section 413.

[0138] It is understood that the connection between the first isolation portion 412 and the second isolation portion 413 may include, but is not limited to, the first isolation portion 412 and the second isolation portion 413 being electrically connected by a wire, or the conductive layer between the first isolation portion 412 and the second isolation portion 413 being retained during the patterning process of forming the first isolation portion 412 and the second isolation portion 413, thereby achieving the electrical connection between the first isolation portion 412 and the second isolation portion 413.

[0139] In one embodiment, the light-emitting device 310 includes a first electrode layer 311, a light-emitting functional layer 312, and a second electrode layer 313 stacked sequentially. The first electrode layer 311 is located between the pixel defining layer 200 and the substrate 100. The first electrode layer 311 is at least partially exposed to the pixel opening 210. The light-emitting functional layer 312 and the second electrode layer 313 are located in the connected pixel opening 210 and the isolation opening 410.

[0140] In one embodiment, the light-emitting device 310 includes a first light-emitting sub-device 301 located in the first display area 10 and a second light-emitting sub-device 302 located in the second display area 20. The area of ​​the first electrode layer 311 of the first light-emitting sub-device 301 projected onto the substrate 100 is smaller than the area of ​​the first electrode layer 311 of the second light-emitting sub-device 302 projected onto the substrate 100. Thus, the first electrode layers 311 of the first light-emitting sub-device 301 and the second light-emitting device 302 are respectively matched with the size of the corresponding pixel opening 210.

[0141] In one embodiment, the orthographic projection of the auxiliary opening 220 onto the substrate 100 is spaced apart from the orthographic projection of the first electrode layer 311 of the first light-emitting device 301 onto the substrate 100. This avoids anode damage to the first electrode layer 311 caused by exposure to the auxiliary opening 220.

[0142] In one embodiment, the orthographic projection of the light-emitting functional layer 312 onto the substrate 100 lies within the orthographic projection range of the second electrode layer 313 onto the substrate 100; the light-emitting functional layer 312 is spaced apart from the isolation structure 400, and the second electrode layer 313 overlaps with the isolation structure 400. This facilitates the realization of a full-surface cathode; furthermore, the spaced arrangement of the light-emitting functional layer 312 and the isolation structure 400 helps avoid crosstalk caused by leakage current between adjacent light-emitting devices, thus improving the display quality of the display panel.

[0143] In one embodiment, refer to Figure 15 The schematic diagram of the cross-sectional structure of the display panel shown includes a first encapsulation layer 500 located on the side of the second electrode layer 313 facing away from the substrate 100. The first encapsulation layer 500 includes a plurality of encapsulation portions 510, the orthographic projection of the encapsulation portions 510 on the substrate 100 covering the orthographic projection of the second electrode layer 313 on the substrate 100. It should be noted that the first encapsulation portions 510 are correspondingly disposed with the isolation opening 410. Therefore, the encapsulation portions 510 can protect the light-emitting devices from the etching solution used in subsequent film layer preparation processes, improving the yield of the display panel.

[0144] The display panel also includes a second encapsulation layer located on the side of the first encapsulation layer 500 opposite to the substrate 100, the second encapsulation layer covering the first display area 10 and the second display area 20.

[0145] In one embodiment, a filling portion is provided within the auxiliary opening 220. The filling portion may be one or more combinations of a first encapsulation layer 500, a second encapsulation layer, a second electrode layer 313, and a light-emitting functional layer 312. The second electrode layer 313 and the light-emitting functional layer 312 are not limited to one layer, and each light-emitting functional layer 312 in the multilayer light-emitting functional layer 312 has a different light-emitting color. When fabricating light-emitting devices with different emitting colors in the first display area 10, the light-emitting functional layer 312, the second electrode layer 313, and the first encapsulation layer 500 are fully covered. Then, patterning is performed so that the light-emitting functional layer 312, the second electrode layer 313, and the first encapsulation layer of a specific emitting color are retained in the corresponding pixel opening. Since the light-emitting devices of different colors are fabricated sequentially, multiple stacked light-emitting functional layers 312, the second electrode layer 313, and the first encapsulation layer 500 are formed in the auxiliary opening 220. When patterning the light-emitting functional layer 312 and the second electrode layer 313, the material in the auxiliary opening 220 is retained, that is, a filling portion with the light-emitting functional layer 312, the second electrode layer 313, and the first encapsulation layer 500 is formed. If the material in the auxiliary opening 220 is removed at the same time during the patterning of the light-emitting device, the second encapsulation layer fills the auxiliary opening, forming a filling portion with only the second encapsulation layer.

[0146] In some embodiments, the substrate may be an array substrate, including an array circuit for driving light-emitting devices to emit light. The array substrate may be a glass substrate. In one embodiment, the array substrate may include an organic resin material such as epoxy resin, triazine, silicone resin, or polyimide. For example, the array substrate may be an FR4 type printed circuit board (PCB), or a flexible PCB that is easily deformable. In one embodiment, the array substrate may include a ceramic material such as silicon nitride, aluminum nitride, or aluminum oxide, or include a metal or metal compound. For example, the array substrate may be a metal core PCB (MCPCB) or a metal copper clad laminate (MCCL).

[0147] For example, the display panel may also include other conventional structures, such as organic encapsulation layers and inorganic encapsulation layers, which will not be described in detail here.

[0148] A second aspect of this application provides a display panel, as shown in [reference] Figure 16The diagram shows a cross-sectional structure of a display panel. The display panel includes a first display area 10 and a second display area 20. The light transmittance of the first display area 10 is greater than that of the second display area 20. The display panel includes: a substrate 100; a pixel defining layer 200 located on one side of the substrate 100, the pixel defining layer 200 having at least one auxiliary opening 220 located in the first display area 10; and an isolation structure 400 located on the side of the pixel defining layer 200 away from the substrate 100, including multiple isolation openings 410, including a first isolation opening 411 located in the first display area 10. The isolation structure 400 includes multiple spaced-apart first isolation portions 412, the first isolation portions 412 surrounding the first isolation opening 411, the first isolation opening 411 being used to accommodate a light-emitting device 310. The auxiliary opening 220 is located between adjacent first isolation portions 412.

[0149] It should be noted that the substrate, pixel defining layer, and isolation structure are the same as described above, and will not be repeated here.

[0150] It should be noted that the display panel in this embodiment can be combined with the display panel described above in whole or in part, which will not be elaborated further here.

[0151] In one embodiment, the plurality of pixel openings 210 include a plurality of first pixel openings 211 and a plurality of second pixel openings 212. The plurality of first pixel openings 211 are located in the first display area 10, and the plurality of second pixel openings 212 are located in the second display area 20. The ratio of the sum of the areas of the orthographic projections of the plurality of first pixel openings 210 and the plurality of auxiliary openings 220 onto the substrate 100 to the area of ​​the orthographic projection of the first display area 10 onto the substrate 100 is the first opening density. The ratio of the sum of the areas of the orthographic projections of the plurality of second pixel openings 212 onto the substrate 100 to the area of ​​the orthographic projection of the second display area 20 onto the substrate 100 is the second opening density. The first opening density is 80% to 120% of the second opening density, for example, it can be 80%, 85%, 90%, 95%, 100%, 105%, 110%, 115%, or 120%, etc. Therefore, the difference between the first aperture density and the second aperture density is appropriate. When the pixel aperture 210 and the auxiliary aperture 220 are prepared by etching process, the etching rates of the first display area 10 and the second display area 20 are not much different, which will hardly cause damage to the first electrode layer 311 or greatly alleviate the damage to the first electrode layer 311. Almost all pixel apertures 210 will expose part of the first electrode layer 311, and the flatness of the first electrode layer 311 of the first display area 10 or the second display area 20 is high, the work function is hardly affected, and the luminous efficiency of the light-emitting device 310 is hardly affected, thereby improving the manufacturing yield of the display panel.

[0152] In a preferred embodiment, the first aperture density is 90% to 110% of the second aperture density. This results in a smaller difference between the first and second aperture densities, leading to a more significant improvement in the display panel manufacturing yield. In a more preferred embodiment, the first aperture density is 100% of the second aperture density. This further reduces the difference between the first and second aperture densities, further improving the display panel manufacturing yield.

[0153] In one embodiment, refer to Figure 3 The second display area 20 includes a sub-region 21 with the same area as the first display area 10. The sub-region 21 is located in any area of ​​the second display area 20. The sum of the orthogonal projection areas of the plurality of first pixel openings 211 and the plurality of auxiliary openings 220 in the first display area 10 onto the substrate 100 is 80% to 120% of the orthogonal projection area of ​​the second pixel openings 212 in the sub-region 21 onto the substrate 100. For example, it can be 80%, 85%, 90%, 95%, 100%, 105%, 110%, 115%, or 120%. Therefore, when the pixel openings 210 and auxiliary openings 220 are prepared by etching, the etching rates of the first display area 10 and the second display area 20 are not significantly different, and the first electrode layer 311 is almost undamaged or the damage to the first electrode layer 311 is greatly mitigated, thereby improving the manufacturing yield of the display panel.

[0154] In one embodiment, the number of second pixel openings 212 in sub-region 21 is greater than the number of first pixel openings 211 in first display area 10.

[0155] In one embodiment, at least one auxiliary opening 220 is provided between adjacent first isolation portions 412. Exemplarily, one or two auxiliary openings 220 are provided between adjacent first isolation portions 412.

[0156] In one embodiment, the shape of the orthographic projection of the auxiliary opening 220 onto the substrate 100 includes a circle.

[0157] (Refer to Figure 1 ), rectangle (see details) Figure 6 ), cross shape (see details) Figure 7 ), X-shaped (please refer to Figure 8 ) and triangles (see details) Figure 9At least one of the following. It is understood that in the first display area 10, the orthographic projection of the pixel opening 210 onto the substrate 100 is generally circular or rectangular (e.g., it can be a rectangle or a square, etc.). When the orthographic projection of the auxiliary opening 220 onto the substrate 100 is circular, the gap between the pixel opening 210 and the auxiliary opening 220 is relatively large. Other shapes of auxiliary opening 220 can be used, such as rectangular, cross-shaped, X-shaped, and triangular, which is beneficial to increase the size of the auxiliary opening 220 and thus increase the area of ​​the auxiliary opening 220.

[0158] Depending on the arrangement of the pixel openings 210 in the first display area 10, the shapes of the auxiliary openings 220 at different positions can be the same or different. They can be specifically set according to the distance between adjacent pixel openings 210 to ensure that the opening area of ​​the first display area 10 matches the opening area of ​​the second display area 20.

[0159] In one embodiment, the orthographic projections of the plurality of auxiliary openings 220 onto the substrate 100 have the same shape. This facilitates the fabrication of the auxiliary openings 220 and reduces the manufacturing difficulty of the display panel.

[0160] In one embodiment, the areas of the orthographic projections of the multiple auxiliary openings 220 onto the substrate 100 are the same. This facilitates the fabrication of the auxiliary openings 220 and reduces the manufacturing difficulty of the display panel.

[0161] In one embodiment, the projected area of ​​the first pixel opening 211 of the same emitting color on the substrate 100 is smaller than the projected area of ​​the corresponding second pixel opening 212 on the substrate 100; the projected shape of the first pixel opening 211 located in the first display area 10 on the substrate 100 is the same as the projected shape of the second pixel opening 212 on the substrate 100. Therefore, the light transmittance of the first display area 10 is greater than that of the second display area 20, and it is beneficial to the fabrication of the pixel opening 210.

[0162] In one embodiment, the auxiliary opening 220 and the pixel opening 210 have the same projected area on the substrate 100. For example, the auxiliary opening 220 and the first pixel opening 211 have the same projected area on the substrate 100, thereby facilitating further improvement in the etching uniformity of the first display area 10. A third aspect of this application provides a method for manufacturing a display panel, referring to… Figure 17 The diagram shows a process flow chart for manufacturing a display panel, which includes the following steps.

[0163] S100: Provides a substrate.

[0164] It should be noted that the substrate is the same as described above, and will not be repeated here.

[0165] S200: A first electrode layer is prepared on one side of the substrate.

[0166] It should be noted that the first electrode layer is consistent with the previous description, and will not be elaborated on further here.

[0167] S300: A pixel defining material layer is prepared on the side of the first electrode layer away from the substrate.

[0168] In one embodiment, after the step of preparing a pixel defining material layer on the side of the first electrode layer away from the substrate, and before the step of forming a plurality of pixel openings and at least one auxiliary opening in the pixel defining material layer, the method further includes: preparing an isolation structure having a plurality of isolation openings on the side of the pixel defining material layer away from the substrate.

[0169] It should be noted that the isolation structure is consistent with the previous description, and will not be elaborated further here.

[0170] In one embodiment, the step of fabricating an isolation structure with multiple isolation openings on the side of the pixel defining material layer away from the substrate includes: sequentially fabricating a second isolation material layer and a first isolation material layer on the side of the pixel defining material layer away from the substrate; patterning the first isolation material layer and the second isolation material layer to obtain multiple isolation openings and a first part and a second part stacked together, wherein the first part is located on the side of the second part away from 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.

[0171] In another embodiment, the step of fabricating an isolation structure with multiple isolation openings on the side of the pixel defining material layer away from the substrate includes: sequentially fabricating a third isolation material layer, a second isolation material layer, and a first isolation material layer on the side of the pixel defining material layer away from the substrate; patterning the first isolation material layer, the second isolation material layer, and the third isolation material layer to obtain multiple isolation openings and a first part, a second part, and a third part stacked sequentially, wherein the first part is located on the side of the second part away from the substrate, the orthographic projection of the second part on the substrate is within the orthographic projection range of the first part on the substrate, and the orthographic projection of the second part on the substrate is within the orthographic projection range of the third part on the substrate.

[0172] S400: A pixel defining layer is obtained by opening multiple pixel openings and at least one auxiliary opening in the pixel defining material layer, wherein the auxiliary opening is located in the first display area.

[0173] In one embodiment, the step of forming a plurality of pixel openings and at least one auxiliary opening in the pixel defining material layer includes: preparing a patterned photoresist 30 on the side of the isolation structure 400 facing away from the substrate 100; exposing a portion of the pixel defining material layer 40 through the photoresist 30, wherein the orthographic projection of the photoresist 30 on the substrate 100 covers the orthographic projection of the isolation structure 400 on the substrate 100 (see specific details). Figure 18The pixel defining material layer 40 is etched to obtain the pixel defining layer 200 (see details). Figure 19 Remove photoresist 30.

[0174] Understandably, the patterned photoresist 30 exposes the positions corresponding to the pixel openings and auxiliary openings. After etching the pixel defining material layer 40, the pixel openings and auxiliary openings are obtained, thus obtaining the pixel defining layer.

[0175] In one embodiment, the etching process for the pixel defining material layer includes dry etching, such as plasma etching. It is understood that during dry etching, the etching rates of the first display area and the second display area are not significantly different. Therefore, the first electrode layer is almost undamaged during the etching of the pixel defining material layer, resulting in minimal impact on the flatness and work function of the first electrode layer and a high yield rate for the display panel.

[0176] S500: A light-emitting functional layer and a second electrode layer are sequentially fabricated in the pixel opening to form a light-emitting device.

[0177] It should be noted that the light-emitting functional layer and the second electrode layer are the same as described above, and will not be repeated here.

[0178] It is understandable that the fabrication method of the light-emitting functional layer and the second electrode layer is the same as that of conventional light-emitting functional layers and second electrode layers, and will not be elaborated further here.

[0179] It should be noted that the display panel prepared by the method of this embodiment can be combined with the display panel described above in whole or in part, which will not be elaborated further here.

[0180] A fourth aspect of this application provides a display device, including the aforementioned display panel, or including a display panel prepared by the aforementioned preparation method.

[0181] It should be noted that, in addition to the aforementioned display panel, the display device may also include structures that conventional display devices should have, such as touch panels and driver chips, which will not be elaborated on further here.

[0182] 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.

[0183] 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.

Claims

1. A display panel, characterized in that, The display panel includes a first display area and a second display area, wherein the light transmittance of the first display area is greater than that of the second display area; The display panel includes: substrate; A pixel defining layer is located on one side of the substrate. The pixel defining layer has multiple pixel openings and multiple auxiliary openings, with the auxiliary openings located in the first display area. The multiple pixel openings include multiple first pixel openings and multiple second pixel openings. The multiple first pixel openings are located in the first display area, and the multiple second pixel openings are located in the second display area. The orthographic projection area of ​​the first pixel openings on the substrate is smaller than the orthographic projection area of ​​the second pixel openings on the substrate. The density of the first pixel openings in the first display area is smaller than the density of the second pixel openings in the second display area. The ratio of the sum of the orthographic projection areas of the multiple first pixel openings and the multiple auxiliary openings on the substrate to the orthographic projection area of ​​the first display area on the substrate is the first opening density. The ratio of the sum of the orthographic projection areas of the multiple second pixel openings on the substrate to the orthographic projection area of ​​the second display area on the substrate is the second opening density. The first opening density is 80% to 120% of the second opening density. Multiple light-emitting unit groups, each light-emitting unit group including multiple light-emitting devices, wherein at least part of the light-emitting devices are located in the pixel opening, and the auxiliary opening is located between adjacent light-emitting devices.

2. The display panel according to claim 1, characterized in that, The first opening density is 90% to 110% of the second opening density.

3. The display panel according to claim 2, characterized in that, The first opening density is 100% of the second opening density.

4. The display panel according to claim 1, characterized in that, The second display area includes a sub-region with the same area as the first display area. The sub-region is located in any area of ​​the second display area. The sum of the areas of the orthogonal projection areas of the plurality of first pixel openings and the plurality of auxiliary openings in the first display area on the substrate is 80% to 120% of the orthogonal projection area of ​​the second pixel openings in the sub-region on the substrate.

5. The display panel according to claim 4, characterized in that, The number of second pixel openings in the sub-region is greater than the number of first pixel openings in the first display area.

6. The display panel according to claim 1, characterized in that, In the first display area, at least one of the light-emitting unit groups has at least one auxiliary opening in the space enclosed by the plurality of light-emitting devices.

7. The display panel according to claim 6, characterized in that, There is at least one auxiliary opening between adjacent light-emitting devices.

8. The display panel according to claim 1, characterized in that, The areas of the orthographic projections of the plurality of auxiliary openings on the substrate are the same.

9. The display panel according to claim 1, characterized in that, The shape of the orthographic projection of the auxiliary opening onto the substrate includes at least one of a circle, a rectangle, a cross, an X-shape, and a triangle.

10. The display panel according to claim 1, characterized in that, The area of ​​the auxiliary opening and the area of ​​the pixel opening projected onto the substrate are the same.

11. The display panel according to claim 1, characterized in that, The orthogonal projection area of ​​the first pixel opening of the same emission color on the substrate is smaller than the orthogonal projection area of ​​the corresponding second pixel opening on the substrate.

12. The display panel according to claim 1, characterized in that, The orthographic projection shape of the first pixel opening located in the first display area on the substrate is the same as the orthographic projection shape of the second pixel opening on the substrate.

13. The display panel according to claim 1, characterized in that, Also includes: An isolation structure is located on the side of the pixel defining layer opposite to the substrate. The isolation structure encloses a plurality of isolation openings, and the orthographic projection of the pixel openings on the substrate is within the orthographic projection range of the isolation openings on the substrate. At least a portion of the light-emitting device is located within the connected isolation opening and the pixel opening.

14. The display panel according to claim 13, characterized in that, The isolation structure includes a first part and a second part stacked together, the first part being located on the side of the second part away from the substrate, and the orthographic projection of the first part on the substrate covering the orthographic projection of the second part on the substrate.

15. The display panel according to claim 14, characterized in that, The isolation structure further includes a third part located on the side of the second part close to the substrate, wherein the orthographic projection of the second part on the substrate is within the orthographic projection range of the third part on the substrate.

16. The display panel according to any one of claims 13 to 15, characterized in that, The plurality of pixel openings include a plurality of first pixel openings located in the first display area; The plurality of isolation openings include a first isolation opening, the first isolation opening being located in the first display area, and the orthographic projection of the first pixel opening on the substrate being within the orthographic projection range of the first isolation opening on the substrate; the isolation structure includes a plurality of spaced-apart first isolation portions, the first isolation portions surrounding the first isolation opening.

17. The display panel according to claim 16, characterized in that, There is at least one auxiliary opening between adjacent first isolation sections.

18. The display panel according to claim 16, characterized in that, The orthographic projection of the first isolation portion on the substrate does not overlap with the orthographic projection of the auxiliary opening on the substrate.

19. The display panel according to claim 16, characterized in that, The isolation structure includes a second isolation section located in the second display area. The second isolation section is mesh-like and encloses a plurality of second isolation openings. The first isolation section is electrically connected to the second isolation section.

20. The display panel according to claim 14 or 15, characterized in that, The light-emitting device includes a first electrode layer, a light-emitting functional layer, and a second electrode layer stacked sequentially. The first electrode layer is located between the pixel defining layer and the substrate. The first electrode layer is at least partially exposed to the pixel opening. The light-emitting functional layer and the second electrode layer are located in the connected pixel opening and the isolation opening.

21. The display panel according to claim 20, characterized in that, The light-emitting device includes a first light-emitting sub-device located in the first display area and a second light-emitting sub-device located in the second display area. The area of ​​the first electrode layer of the first light-emitting sub-device projected onto the substrate is smaller than the area of ​​the first electrode layer of the second light-emitting sub-device projected onto the substrate.

22. The display panel according to claim 21, characterized in that, The orthographic projection of the auxiliary opening on the substrate is spaced apart from the orthographic projection of the first electrode layer of the first light-emitting device on the substrate.

23. The display panel according to claim 20, characterized in that, The orthogonal projection of the light-emitting functional layer on the substrate is located within the orthogonal projection range of the second electrode layer on the substrate.

24. The display panel according to claim 20, characterized in that, The light-emitting functional layer is spaced apart from the isolation structure, and the second electrode layer overlaps with the isolation structure.

25. The display panel according to any one of claims 21 to 24, characterized in that, Also includes: A first encapsulation layer is located on the side of the second electrode layer opposite to the substrate. The first encapsulation layer includes a plurality of encapsulation portions, the orthographic projection of the encapsulation portions on the substrate covering the orthographic projection of the second electrode layer on the substrate.

26. A display panel, characterized in that, The display panel includes a first display area and a second display area, wherein the light transmittance of the first display area is greater than that of the second display area; The display panel includes: substrate; A pixel defining layer is located on one side of the substrate. The pixel defining layer has multiple pixel openings and multiple auxiliary openings, with the auxiliary openings located in the first display area. The multiple pixel openings include multiple first pixel openings and multiple second pixel openings. The multiple first pixel openings are located in the first display area, and the multiple second pixel openings are located in the second display area. The orthographic projection area of ​​the first pixel openings on the substrate is smaller than the orthographic projection area of ​​the second pixel openings on the substrate. The density of the first pixel openings in the first display area is smaller than the density of the second pixel openings in the second display area. The ratio of the sum of the orthographic projection areas of the multiple first pixel openings and the multiple auxiliary openings on the substrate to the orthographic projection area of ​​the first display area on the substrate is the first opening density. The ratio of the sum of the orthographic projection areas of the multiple second pixel openings on the substrate to the orthographic projection area of ​​the second display area on the substrate is the second opening density. The first opening density is 80% to 120% of the second opening density. An isolation structure is located on the side of the pixel defining layer opposite to the substrate, and includes a plurality of isolation openings, including a first isolation opening located in the first display area. The isolation structure includes a plurality of spaced-apart first isolation portions, the first isolation portions surrounding the first isolation openings, and the first isolation openings being used to accommodate light-emitting devices. The auxiliary opening is located between adjacent first isolation sections.

27. The display panel according to claim 26, characterized in that, The first opening density is 90% to 110% of the second opening density.

28. The display panel according to claim 27, characterized in that, The first opening density is 100% of the second opening density.

29. The display panel according to claim 26, characterized in that, The second display area includes a sub-region with the same area as the first display area. The sub-region is located in any area of ​​the second display area. The sum of the areas of the orthogonal projection areas of the plurality of first pixel openings and the plurality of auxiliary openings in the first display area on the substrate is 80% to 120% of the orthogonal projection area of ​​the second pixel openings in the sub-region on the substrate.

30. The display panel according to claim 29, characterized in that, The number of second pixel openings in the sub-region is greater than the number of first pixel openings in the first display area.

31. The display panel according to claim 26, characterized in that, There is at least one auxiliary opening between adjacent first isolation sections.

32. The display panel according to claim 26, characterized in that, The areas of the orthographic projections of the plurality of auxiliary openings on the substrate are the same.

33. The display panel according to claim 26, characterized in that, The shape of the orthographic projection of the auxiliary opening onto the substrate includes at least one of a circle, a rectangle, a cross, an X-shape, and a triangle.

34. The display panel according to claim 26, characterized in that, The area of ​​the auxiliary opening and the area of ​​the pixel opening projected onto the substrate are the same.

35. The display panel according to claim 26, characterized in that, The orthogonal projection area of ​​the first pixel opening of the same emission color on the substrate is smaller than the orthogonal projection area of ​​the corresponding second pixel opening on the substrate.

36. The display panel according to claim 26, characterized in that, The orthographic projection shape of the first pixel opening located in the first display area on the substrate is the same as the orthographic projection shape of the second pixel opening on the substrate.

37. A method for manufacturing a display panel, characterized in that, include: Provide a substrate; A first electrode layer is prepared on one side of the substrate; A pixel defining material layer is prepared on the side of the first electrode layer opposite to the substrate; A pixel defining layer is obtained by forming a plurality of pixel openings and a plurality of auxiliary openings in the pixel defining material layer, wherein the auxiliary openings are located in the first display area; The plurality of pixel openings include a plurality of first pixel openings and a plurality of second pixel openings, wherein the plurality of first pixel openings are located in the first display area and the plurality of second pixel openings are located in the second display area; The projected area of ​​the first pixel opening on the substrate is smaller than the projected area of ​​the second pixel opening on the substrate; the density of the first pixel opening in the first display area is smaller than the density of the second pixel opening in the second display area; The ratio of the sum of the areas of the orthographic projections of the plurality of first pixel openings and the plurality of auxiliary openings on the substrate to the area of ​​the orthographic projection of the first display area on the substrate is the first opening density; the ratio of the sum of the areas of the orthographic projections of the plurality of second pixel openings on the substrate to the area of ​​the orthographic projection of the second display area on the substrate is the second opening density; and the first opening density is 80% to 120% of the second opening density. A light-emitting functional layer and a second electrode layer are sequentially fabricated in the pixel opening to form a light-emitting device.

38. The preparation method according to claim 37, characterized in that, After the step of fabricating a pixel defining material layer on the side of the first electrode layer opposite to the substrate, and before the step of forming a plurality of pixel openings and at least one auxiliary opening in the pixel defining material layer, the method further includes: An isolation structure with multiple isolation openings is formed on the side of the pixel defining material layer opposite to the substrate.

39. The preparation method according to claim 38, characterized in that, The step of fabricating an isolation structure with multiple isolation openings on the side of the pixel defining material layer opposite to the substrate includes: A second isolation material layer and a first isolation material layer are sequentially fabricated on the side of the pixel defining material layer facing away from the substrate; the first and second isolation material layers are patterned to obtain multiple isolation openings and stacked first and second portions, wherein the first portion is located on the side of the second portion facing away from the substrate, and the orthographic projection of the second portion on the substrate is located within the orthographic projection of the first portion on the substrate; or... A third isolation material layer, a second isolation material layer, and a first isolation material layer are sequentially prepared on the side of the pixel defining material layer away from the substrate. The first isolation material layer, the second isolation material layer, and the third isolation material layer are patterned to obtain multiple isolation openings and a first part, a second part, and a third part stacked sequentially. The first part is located on the side of the second part away from the substrate. The orthographic projection of the second part on the substrate is within the orthographic projection range of the first part on the substrate. The orthographic projection of the second part on the substrate is within the orthographic projection range of the third part on the substrate.

40. The preparation method according to claim 38, characterized in that, The step of creating multiple pixel openings and at least one auxiliary opening in the pixel defining material layer includes: A patterned photoresist is prepared on the side of the isolation structure opposite to the substrate; the photoresist exposes a portion of the pixel defining material layer, and the orthographic projection of the photoresist on the substrate covers the orthographic projection of the isolation structure on the substrate; The pixel defining material layer is etched to obtain the pixel defining layer.

41. The preparation method according to claim 40, characterized in that, The etching process for the pixel-defining material layer includes dry etching.

42. A display device, characterized in that, It includes the display panel according to any one of claims 1 to 36, or the display panel prepared by the preparation method according to any one of claims 37 to 41.

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