Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device. The display panel includes: a substrate; the pixel defining layer is located on one side of the substrate, the pixel defining layer is provided with a plurality of pixel openings and at least one auxiliary opening, and the auxiliary opening is located in the first display area; each light-emitting unit group comprises a plurality of light-emitting devices, the light-emitting devices are at least partially located in the pixel openings, and the auxiliary openings are located between the adjacent light-emitting devices. The auxiliary opening is formed in the first display area, so that the area of the orthographic projection of the opening, in the first display area, of the pixel defining layer on the substrate is increased, and the area difference of the orthographic projection of the opening, in the first display area and the second display area, of the pixel defining layer on the substrate is reduced; therefore, the difference between the etching rates of the openings in the first display area and the second display area is small, and the manufacturing yield of the display panel can be improved.

Description

Technical Field

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

[0002] With the development of display technology, organic light emitting diode (OLED) display products have occupied the high-end display product market in recent years due to their excellent picture quality and wide application scenarios. OLED display panels have the advantages of being thin, light, flexible, high contrast, and wide color gamut, and are widely used.

[0003] In the process of preparing traditional display panels, the luminous pixel graphics are usually realized through a fine metal mask (FMM). FMM technology is mature and has rich experience in mass production. However, FMM technology also has problems such as limited precision, high development cost, and long development cycle. The non-fine metal mask technology eliminates the limitations of traditional OLED processes on display screen size, resolution and other screen performance, and has the advantages of high performance, full-domain size, and agile delivery. Patents CN118251982A, CN116648095A, CN117062489A, CN118742138A, CN118678783A, CN118660598A, CN118675450A, CN118824188A, and CN118781966A record the relevant content of the non-fine metal mask technology for reference.

[0004] At present, in OLED display panels including under-display cameras (UDC), the area where the under-display camera is located usually reduces the light-emitting area of ​​the light-emitting unit to improve the transmittance of the UDC area. However, due to the limitations of related technologies, current OLED display panels still cannot meet the needs well. Summary of the invention

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

[0006] In a first aspect, the present application provides a display panel, the display panel comprising a first display area and a second display area, the light transmittance of the first display area being greater than the light transmittance 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, and the pixel defining layer is provided with a plurality of pixel openings and at least one auxiliary opening, and the auxiliary opening is located in the first display area;

[0010] A plurality of light emitting unit groups are provided, each light emitting unit group comprising a plurality of 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 include a plurality of first pixel openings and a plurality of second pixel openings, 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;

[0012] The orthographic projection area of ​​the first pixel opening on the substrate is smaller than the orthographic projection area of ​​the second pixel opening on the substrate;

[0013] A first pixel opening density in the first display area is less than a second pixel opening density 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, 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 first opening density is 90% to 110% of the second opening density;

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

[0017] Preferably, the second display area includes a sub-area with the same area as the first display area, the sub-area is located in any area of ​​the second display area, and the sum of the orthographic 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 orthographic projection area of ​​the second pixel openings in the sub-area on the substrate;

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

[0019] In one embodiment, in the first display area, in at least one light-emitting unit group, a space surrounded by a plurality of light-emitting devices has at least one auxiliary opening;

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

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

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

[0023] Preferably, the auxiliary opening has the same area as the orthographic projection of the pixel opening on the substrate;

[0024] Preferably, the orthographic projection area of ​​the first pixel opening of the same luminous color on the substrate is smaller than the orthographic projection area of ​​the corresponding second pixel opening on the substrate;

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

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

[0027] Preferably, at least part of the light emitting device is located in the communicating isolation opening and pixel opening.

[0028] In one embodiment, the isolation structure includes a first portion and a second portion stacked together, the first portion is located on a side of the second portion facing away from the substrate, and an orthographic projection of the first portion on the substrate covers an orthographic projection of the second portion on the substrate;

[0029] Preferably, the isolation structure further comprises a third portion, which is located on a side of the second portion close to the substrate, and an orthographic projection of the second portion on the substrate is located within a range of an orthographic projection of the third portion on the substrate.

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

[0031] The plurality of isolation openings include a first isolation opening, the first isolation opening 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 a plurality of first isolation parts arranged at intervals, and the first isolation parts surround the first isolation opening;

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

[0033] Preferably, 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;

[0034] Preferably, the isolation structure includes a second isolation portion located in the second display area, the second isolation portion is mesh-shaped, and the second isolation portion encloses a plurality of second isolation openings;

[0035] The first isolation portion is electrically connected to the second isolation portion.

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

[0037] Preferably, the light-emitting device comprises 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, and the area of ​​the orthographic projection of the first electrode layer of the first light-emitting sub-device on the substrate is smaller than the area of ​​the orthographic projection of the first electrode layer of the second light-emitting sub-device on 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 sub-device on the substrate.

[0039] In one embodiment, the orthographic projection of the light-emitting functional layer on the substrate is located within the orthographic 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 the isolation structure.

[0041] In one embodiment, it further includes: a first packaging layer located on a side of the second electrode layer away from the substrate, the first packaging layer includes a plurality of packaging parts, and the orthographic projections of the packaging parts on the substrate cover the orthographic projections of the second electrode layer on the substrate.

[0042] A second aspect of the present application provides a display panel, the display panel comprising a first display area and a second display area, the light transmittance of the first display area being greater than the light transmittance 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 is provided with at least one auxiliary opening, and the auxiliary opening is located in the first display area;

[0046] an isolation structure, located on a side of the pixel defining layer away from the substrate, comprising a plurality of isolation openings, the plurality of isolation openings including a first isolation opening located in the first display area, the isolation structure comprising a plurality of first isolation portions arranged at intervals, the first isolation portions enclosing the first isolation opening, the first isolation opening being used to accommodate the light emitting device;

[0047] Wherein, the auxiliary opening is located between adjacent first isolation parts.

[0048] In one embodiment, the plurality of pixel openings include a plurality of first pixel openings and a plurality of second pixel openings, 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;

[0049] The orthographic projection area of ​​the first pixel opening on the substrate is smaller than the orthographic projection area of ​​the second pixel opening on the substrate;

[0050] A first pixel opening density in the first display area is less than a second pixel opening density 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, 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 first opening density is 90% to 110% of the second opening density;

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

[0054] Preferably, the second display area includes a sub-area with the same area as the first display area, the sub-area is located in any area of ​​the second display area, and the sum of the orthographic 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 orthographic projection area of ​​the second pixel openings in the sub-area on the substrate;

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

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

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

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

[0059] Preferably, the auxiliary opening has the same area as the orthographic projection of the pixel opening on the substrate;

[0060] Preferably, the orthographic projection area of ​​the first pixel opening of the same luminous color on the substrate is smaller than the orthographic projection area of ​​the corresponding second pixel opening on the substrate;

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

[0062] A third aspect of the present application provides a method for preparing a display panel, comprising:

[0063] providing a substrate;

[0064] preparing a first electrode layer on one side of the substrate;

[0065] Prepare a pixel defining material layer on a side of the first electrode layer facing away from the substrate;

[0066] A plurality of pixel openings and at least one auxiliary opening are formed in the pixel defining material layer to obtain a pixel defining 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 prepared in the pixel opening to form a light-emitting device.

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

[0069] Prepare an isolation structure with a plurality of isolation openings on a side of the pixel defining material layer facing away from the substrate;

[0070] Preferably, the step of preparing an isolation structure having a plurality of isolation openings on a side of the pixel defining material layer facing away from the substrate comprises:

[0071] A second isolation material layer and a first isolation material layer are sequentially prepared on a side of the pixel defining material layer facing away from the substrate; the first isolation material layer and the second isolation material layer are patterned to obtain a plurality of isolation openings and a first portion and a second portion stacked, wherein the first portion is located on a side of the second portion facing away from the substrate, and an orthographic projection of the second portion on the substrate is located within an orthographic projection of the first portion 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 a side of the pixel defining material layer facing away from the substrate; the first isolation material layer, the second isolation material layer and the third isolation material layer are patterned to obtain a plurality of isolation openings and a first part, a second part and a third part stacked in sequence, wherein the first part is located on a side of the second part facing away from the substrate, an orthographic projection of the second part on the substrate is located within the orthographic projection range of the first part on the substrate, and an orthographic projection of the second part on the substrate is located within the orthographic projection range of the third part on the substrate.

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

[0074] A patterned photoresist is prepared on a side of the isolation structure facing away from the substrate; the photoresist exposes a portion of the pixel defining material layer, and an orthographic projection of the photoresist on the substrate covers an orthographic projection of the isolation structure on the substrate;

[0075] Etching the pixel defining material layer to obtain a pixel defining layer;

[0076] Preferably, the method of etching the pixel defining material layer includes dry etching.

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

[0078] In the display panel provided in the embodiment of the present application, an auxiliary opening is arranged in the first display area, which is beneficial to increasing the area of ​​the orthographic projection of the opening of the pixel defining layer in the first display area on the substrate, and further beneficial to narrowing the difference in the area of ​​the orthographic projection of the opening of the pixel defining layer in the first display area and the second display area on the substrate. When an etching method is used to open an opening in the pixel defining layer, the difference in etching rate between the openings in the first display area and the second display area will be smaller, which is beneficial to improving the manufacturing yield of the display panel; at the same time, the arrangement of the auxiliary opening is also beneficial to improving the light transmittance of the first display area and improving the display quality of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 It is a schematic diagram of the cross-sectional structure of a display panel in one embodiment of the present application.

[0080] Figure 2 The figure is a schematic diagram of a top view of the structure of a display panel in one embodiment of the present application.

[0081] Figure 3 This is a schematic diagram of a top view of the structure of a display panel in another embodiment of the present application.

[0082] Figure 4 This is a schematic diagram of a top view of the structure of a display panel in another embodiment of the present application.

[0083] Figure 5 This is a schematic diagram of a top view of the structure of a display panel in another embodiment of the present application.

[0084] Figure 6 This is a schematic diagram of a top view of the structure of a display panel in another embodiment of the present application.

[0085] Figure 7 This is a schematic diagram of a top view of the structure of a display panel in another embodiment of the present application.

[0086] Figure 8 This is a schematic diagram of a top view of the structure of a display panel in another embodiment of the present application.

[0087] Fig. 9 This is a schematic diagram of a top view of the structure of a display panel in another embodiment of the present application.

[0088] Fig.10 This is a schematic diagram of the cross-sectional structure of a display panel in another embodiment of the present application.

[0089] Fig.11 It is a schematic diagram of the cross-sectional structure of the isolation structure in one embodiment of the present application.

[0090] Fig.12 It is a schematic diagram of the cross-sectional structure of the isolation structure in another embodiment of the present application.

[0091] Fig.13 It is a schematic diagram of the cross-sectional structure of the isolation structure in another embodiment of the present application.

[0092] Fig.14 This is a schematic diagram of a top view of the structure of a display panel in another embodiment of the present application.

[0093] Fig.15 This is a schematic diagram of the cross-sectional structure of a display panel in another embodiment of the present application.

[0094] Fig.16 This is a schematic diagram of the cross-sectional structure of a display panel in another embodiment of the present application.

[0095] Fig.17 The figure is a schematic flow chart of a method for preparing a display panel in one embodiment of the present application.

[0096] Figure 18 to Figure 19 It is a schematic diagram of a process of opening a plurality of pixel openings and at least one auxiliary opening in a pixel defining material layer in one embodiment of the present application. DETAILED DESCRIPTION

[0097] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0098] In addition, in order to better illustrate the present application, numerous specific details are provided in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods and means well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0099] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0100] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0101] The present application provides a display panel according to a first aspect. Figure 1 The cross-sectional structure diagram of the display panel shown in FIG. Figure 2 The display panel shown is a schematic diagram of a top view structure, wherein the display panel includes a first display area 10 and a second display area 20, wherein the transmittance of the first display area 10 is greater than the transmittance 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 is provided with a plurality of pixel openings 210 and at least one auxiliary opening 220, the auxiliary opening 220 is located in the first display area 10; a plurality of light-emitting unit groups 300, the light-emitting unit groups 300 include a plurality of light-emitting devices 310, the light-emitting devices 310 are at least partially located in the pixel openings 210, and the auxiliary openings 220 are located between adjacent light-emitting devices 310.

[0102] In the display panel provided in the embodiment of the present application, an auxiliary opening 220 is provided in the first display area 10, which is beneficial to increase the area of ​​the orthographic projection of the opening of the pixel defining layer 200 in the first display area 10 on the substrate 100, and further helps to reduce the difference in the area of ​​the orthographic projection of the opening of the pixel defining layer 200 in the first display area 10 and the second display area 20 on the substrate. When an etching method is used to open an opening in the pixel defining layer 200, 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 provision 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] Exemplarily, the first display area 10 may be an under display camera (UDC) area, and the second display area 20 may be a normal display area.

[0104] Exemplarily, the size of the pixel opening 210 in the UDC region is smaller than that in the normal display region; moreover, the UDC region has a higher light transmittance, and the density of the pixel openings 210 in the UDC region is smaller than that in the normal display region. It can be understood that the density of the pixel openings 210 in the UDC region refers to: in the UDC region, the ratio of the area of ​​the pixel openings 210 projected on the substrate 100 to the area of ​​the UDC region projected on the substrate 100; the density of the pixel openings 210 in the normal display region refers to: in the normal display region, the ratio of the area of ​​the pixel openings 210 projected on the substrate 100 to the area of ​​the normal display region projected on the substrate 100.

[0105] In one embodiment, referring 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 which are stacked in sequence. 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 can be 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 (Emitting Layer, EML), and may also 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] Illustratively, during the manufacturing process of the pixel definition layer 200 , a pixel definition material layer is first prepared on one side of the substrate 100 , and then a pixel opening 210 is opened in the pixel definition 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 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 a dry etching process) to etch the pixel defining material layer will cause the etching rates of the pixel openings 210 in the first display area 10 and the second display area 20 to be different. Specifically, the etching rate of the first display area 10 is faster, and 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, and the first display area 10 has already experienced over-etching, resulting in partial etching of the first electrode layer 311. If the first electrode layer 311 is damaged too much, 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 further resulting in a reduction in the yield of display panel manufacturing. Moreover, in the process of etching the pixel defining material layer to obtain the pixel opening 210, a certain over-etching amount will be set to ensure that all the pixel openings 210 can expose part of the first electrode layer 311, otherwise part of the first electrode layer 311 cannot be exposed, and the light-emitting device 310 cannot be lit. The inventor of the present application found that the etching rate in the dry etching process is strongly correlated with the pattern density (the number of patterns per unit area) (usually, the smaller the pattern area etched in the same area, the faster the etching rate); since the density of the pixel openings 210 in the UDC area is usually smaller than the density of the pixel openings 210 in the normal display area (main screen area), or the size of the pixel openings 210 in the UDC area is usually smaller than the size of the pixel openings 210 in the normal display area (main screen area), the etching rates of the pixel openings 210 in the UDC area and the normal display area are different, and specifically, the etching rate of the UDC area is faster. In view of this, in the embodiment of the present application, at least one auxiliary opening 220 is set in the UDC area to increase the opening density of the UDC area and reduce the difference in etching rate between the UDC area and the normal display area.

[0108] In one embodiment, referring to Figure 2, 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 orthographic projection area of ​​the first pixel openings 211 on the substrate 100 is smaller than the orthographic projection area of ​​the second pixel openings 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 openings 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 openings 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, 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, and 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 opening density and the second opening density is appropriate. When the pixel opening 210 and the auxiliary opening 220 are prepared by an etching process, the etching rates of the first display area 10 and the second display area 20 are almost the same, and the first electrode layer 311 is hardly damaged or the damage to the first electrode layer 311 is greatly alleviated. Almost all the pixel openings 210 will expose part of the first electrode layer 311, and the first electrode layer 311 of the first display area 10 or the second display area 20 has a high flatness and the work function is hardly affected. 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 figure, since the pixel opening 210, the first pixel opening 211 and the second pixel opening 212 are located below the second electrode layer 313, they cannot be directly shown in the top view and are drawn with dotted lines. It should be noted that the dotted pixel opening 210, the first pixel opening 211 and the second pixel opening 212 located in the second electrode layer 313 are only used to explain the present application and cannot be understood as a limitation on the present application.

[0111] In a preferred embodiment, the first opening density is 90% to 110% of the second opening density. Thus, the difference between the first opening density and the second opening density is smaller, and the effect of improving the display panel manufacturing yield is more significant. In a more preferred embodiment, the first opening density is 100% of the second opening density. Thus, the difference between the first opening density and the second opening density is further reduced, and the display panel manufacturing yield is further improved.

[0112] In one embodiment, referring to Figure 3 The schematic diagram of the top view structure of the display panel shown in the figure shows that the second display area 20 includes a sub-area 21 with the same area as the first display area 10, and the sub-area 21 is located in any area of ​​the second display area 20. The sum of the orthographic projection areas of the plurality of first pixel openings 211 and the plurality of auxiliary openings 220 in the first display area 10 on the substrate 100 is 80% to 120% of the orthographic projection area of ​​the second pixel opening 212 in the sub-area 21 on the substrate 100, for example, it can be 80%, 85%, 90%, 95%, 100%, 105%, 110%, 115% or 120%, etc. Therefore, when the pixel opening 210 and the auxiliary opening 220 are prepared by the etching process, the etching rates of the first display area 10 and the second display area 20 are not much different, and the first electrode layer 311 is almost not damaged or the damage to the first electrode layer 311 is greatly alleviated, thereby improving the manufacturing yield of the display panel.

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

[0114] It should be noted that Figure 3 In the figure, the sub-region 21 is divided by a dotted line. In actual situations, the border of the sub-region 21 may exist or may not exist. Figure 3 It is only used to illustrate the sub-area 21 and cannot be understood as a limitation of the present application. Figure 3 In the figure, the enlarged structural schematic diagram of the first display area 10 is located on the right side of the top-view structural schematic diagram of the display panel, and the enlarged structural schematic diagram of the sub-area 21 is located on the left side of the top-view structural schematic diagram of the display panel. The two enlarged structural schematic diagrams are used to illustrate the first display area 10 and the sub-area 21 and cannot be understood as limitations on the present application.

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

[0116] In one embodiment, referring to Figure 4In the schematic diagram of the top view of the display panel shown, there is at least one auxiliary opening 220 between adjacent light emitting devices 310 , thereby facilitating the increase of the opening area of ​​the auxiliary opening 220 . Exemplarily, 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 facilitates the production of the auxiliary openings 220 and reduces the production difficulty.

[0118] For example, refer to Figure 5 In the schematic diagram of the top view of the display panel shown, two auxiliary openings 220 are provided between adjacent light emitting devices 310 , thereby facilitating further increasing the opening area of ​​the auxiliary openings 220 .

[0119] It can be understood that, among the multiple light emitting devices 310 in the same light emitting unit group 300 , there is 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. In the space enclosed by all light-emitting unit groups 300, the arrangement of the auxiliary openings 220 remains consistent, which is beneficial to improving the light transmittance of the first display area 10 while improving the display quality of the display panel in the first display area 10, and also helps to reduce the difficulty of manufacturing the display panel.

[0121] In one embodiment, the shape of the orthographic projection of the auxiliary opening 220 on the substrate 100 includes a circular

[0122] (Refer to Figure 1 ), rectangle (see Figure 6 ), cross (see Figure 7 ), X-shaped (please refer to Figure 8 ) and triangle (see Fig. 9 ). It can be understood that, in the first display area 10, the shape of the orthographic projection of the pixel opening 210 on the substrate 100 is generally circular or rectangular (for example, it can be a rectangle or a square, etc.), and when the orthographic projection of the auxiliary opening 220 on the substrate 100 is circular, the gap between the pixel opening 210 and the auxiliary opening 220 is relatively large, and the auxiliary opening 220 can be of other shapes, such as a rectangle, a cross, an X shape, and a triangle, etc., which is conducive to increasing the size of the auxiliary opening 220, so as to increase the area of ​​the auxiliary opening 220.

[0123] According to the arrangement position 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, and 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 shapes of the orthographic projections of the plurality of auxiliary openings 220 on the substrate 100 are the same, thereby facilitating the manufacture of the auxiliary openings 220 and reducing the difficulty of manufacturing the display panel.

[0125] In one embodiment, the orthographic projection areas of the plurality of auxiliary openings 220 on the substrate 100 are the same, thereby facilitating the manufacture of the auxiliary openings 220 and reducing the difficulty of manufacturing the display panel.

[0126] In one embodiment, the orthographic projection area of ​​the first pixel opening 211 of the same luminous color on the substrate 100 is smaller than the orthographic projection area of ​​the corresponding second pixel opening 212 on the substrate 100; the orthographic projection shape of the first pixel opening 211 located in the first display area 10 on the substrate 100 is the same as the orthographic projection 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 the manufacturing of the pixel opening 210 is facilitated.

[0127] In one embodiment, the auxiliary opening 220 and the pixel opening 210 have the same orthographic projection area on the substrate 100. Exemplarily, the auxiliary opening 220 and the first pixel opening 211 have the same orthographic projection area on the substrate 100, thereby further improving the etching uniformity of the first display area 10. Fig.10 The cross-sectional structure diagram of the display panel shown in the figure, the display panel also includes: an isolation structure 400, located on the side of the pixel defining layer 200 away from the substrate 100, the isolation structure 400 encloses a plurality of isolation openings 410, and the orthographic projection of the pixel opening 210 on the substrate 100 is located within the orthographic projection range of the isolation opening 410 on the substrate 100. The isolation structure 400 is conducive to isolating subsequent film layers, for example, it is conducive to isolating the light-emitting functional layer 312 and the second electrode layer 313 of the light-emitting device 310, and a light-emitting device 310 with high precision can be manufactured without using a mask plate, which is conducive to reducing the difficulty of manufacturing the display panel, and can reduce the manufacturing cost of the display panel and improve the manufacturing accuracy of the display panel pixels.

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

[0129] In one embodiment, referring to Fig.11 and Fig.12The schematic diagram of the cross-sectional structure of the isolation structure shown, the isolation structure 400 includes a first portion 401 and a second portion 402 stacked, the first portion 401 is located on the side of the second portion 402 away from the substrate 100, and the orthographic projection of the second portion 402 on the substrate 100 is located within the orthographic projection of the first portion 401 on the substrate 100. Exemplarily, the second portion 402 can be designed as an independent film layer, that is, there is no physical interface inside the second portion 402, and each part is composed of the same material, for example, the material of the second portion 402 is aluminum. Alternatively, the second portion 402 can be designed to be composed of at least two film layers stacked. For example, the second portion 402 is formed by stacking two conductive film layers, the materials of the two conductive film layers can be molybdenum and aluminum, respectively, and the conductive film layer composed of molybdenum is located between the substrate 100 and the conductive film layer composed of aluminum. Exemplarily, the second portion 402 includes a conductive sub-portion, or the second portion 402 itself is a conductive structure. The second portion 402 overlaps 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 portion 401 can be an organic material, an inorganic material, or a metal material. When the first portion 401 is a metal material, the material of the second portion 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, referring to Fig.13 As shown in the cross-sectional structural diagram of the isolation structure, the isolation structure 400 further includes a third portion 403, which is located on the side of the second portion 402 close to the substrate 100, and the orthographic projection of the second portion 402 on the substrate 100 is located within the orthographic projection range of the third portion 403 on the substrate 100. The second electrode layer 313 can be effectively overlapped with the third portion 403 and / or the second portion 402, thereby facilitating the realization of a full-surface cathode.

[0131] It can be understood that the above-mentioned structure of the isolation structure 400 can effectively isolate the light-emitting functional layer 312 and the second electrode layer 313; illustratively, when the light-emitting functional layer 312 is prepared by evaporation, the isolation structure 400 can effectively isolate the evaporated light-emitting functional material layer to obtain the light-emitting functional layer 312 located in the isolation opening 410, and a light-emitting functional layer 312 with higher precision can be obtained without using a mask plate, thereby improving the yield of the display panel and reducing the production cost.

[0132] In one embodiment, referring to Fig.14In the schematic diagram of the top view structure of the display panel shown, the plurality of pixel openings 210 include a plurality of first pixel openings 211, which are located in the first display area 10; the plurality of isolation openings 410 include a first isolation opening 411, which is located in the first display area 10, and the orthographic projection of the first pixel opening 211 on the substrate 100 is located within the orthographic projection range of the first isolation opening 411 on the substrate 100; the isolation structure 400 includes a plurality of first isolation portions 412 arranged at intervals, and the first isolation portions 412 surround the first isolation opening 411. Therefore, the first isolation portions 412 arranged at intervals surround the first isolation opening 411, which is conducive to improving the light transmittance of the first display area 10.

[0133] In one embodiment, referring to Fig.14 , the auxiliary opening 220 is located between adjacent first isolation portions 412 .

[0134] Exemplarily, there is at least one auxiliary opening 220 between adjacent first isolation portions 412 .

[0135] Exemplarily, one or two auxiliary openings 220 are provided between adjacent first isolation portions 412 .

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

[0137] In one embodiment, referring to Fig.14 The isolation structure 400 includes a second isolation portion 413 located in the second display area 20 . The second isolation portion 413 is mesh-shaped and surrounds a plurality of second isolation openings 414 . The first isolation portion 412 is electrically connected to the second isolation portion 413 .

[0138] It can be understood that the connection method between the first isolation part 412 and the second isolation part 413 includes but is not limited to, the first isolation part 412 and the second isolation part 413 are electrically connected through a wire, or in the process of patterning the first isolation part 412 and the second isolation part 413, the conductive layer between the first isolation part 412 and the second isolation part 413 is retained to achieve electrical connection between the first isolation part 412 and the second isolation part 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 which are stacked in sequence, 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, and 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, and the area of ​​the orthographic projection of the first electrode layer 311 of the first light emitting sub-device 301 on the substrate 100 is smaller than the area of ​​the orthographic projection of the first electrode layer 311 of the second light emitting sub-device 302 on the substrate 100. Therefore, the first electrode layers 311 of the first light emitting sub-device 301 and the second light emitting sub-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 on the substrate 100 is spaced apart from the orthographic projection of the first electrode layer 311 of the first light-emitting sub-device 301 on the substrate 100 . Thus, the anode damage caused by the first electrode layer 311 being exposed in the auxiliary opening 220 is avoided.

[0142] In one embodiment, the orthographic projection of the light-emitting functional layer 312 on the substrate 100 is within the orthographic projection range of the second electrode layer 313 on the substrate 100; the light-emitting functional layer 312 is spaced apart from the isolation structure 400, and the second electrode layer 313 overlaps the isolation structure 400. Thus, it is beneficial to realize the whole cathode; and the spaced arrangement of the light-emitting functional layer 312 and the isolation structure 400 is beneficial to avoid crosstalk caused by leakage between adjacent light-emitting devices, thereby improving the display quality of the display panel.

[0143] In one embodiment, referring to Fig.15 The cross-sectional structure diagram of the display panel shown in the figure, the display panel also includes: a first encapsulation layer 500, located on the side of the second electrode layer 313 away from the substrate 100, the first encapsulation layer 500 includes a plurality of encapsulation parts 510, and the orthographic projection of the encapsulation part 510 on the substrate 100 covers the orthographic projection of the second electrode layer 313 on the substrate 100. It should be noted that the first encapsulation part 510 is arranged corresponding to the isolation opening 410. Thus, the encapsulation part 510 can protect the light-emitting device from the influence of the etching solution used in the subsequent film preparation process, thereby improving the yield of the display panel.

[0144] The display panel further includes a second encapsulation layer located on a side of the first encapsulation layer 500 facing away from the substrate 100 , and the second encapsulation layer covers the first display area 10 and the second display area 20 .

[0145] In one embodiment, a filling portion is provided in the auxiliary opening 220, and the filling portion may be one or more combinations of the first encapsulation layer 500, the second encapsulation layer, the second electrode layer 313, and the 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 multiple light-emitting functional layers 312 has a different light-emitting color. For example, when preparing light-emitting devices with different light-emitting colors in the first display area 10, the light-emitting functional layer 312, the second electrode layer 313 and the first packaging layer 500 will cover the entire surface, and then be patterned so that the light-emitting functional layer 312, the second electrode layer 313 and the first packaging layer of a specific light-emitting color are retained in the corresponding pixel opening. Since light-emitting devices of different colors are prepared one by one, a plurality of stacked light-emitting functional layers 312, the second electrode layer 313 and the first packaging 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 having the light-emitting functional layer 312, the second electrode layer 313 and the first packaging layer 500 is formed. If the material in the auxiliary opening 220 is removed at the same time during the process of patterning the light-emitting device, the second packaging layer fills the auxiliary opening to form a filling portion having only the second packaging layer.

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

[0147] Exemplarily, the display panel may further include other conventional structures, such as an organic encapsulation layer and an inorganic encapsulation layer, etc., which will not be described in detail here.

[0148] A second aspect of the present application provides a display panel, referring to Fig.16The cross-sectional structure schematic diagram of the display panel shown in the figure, the display panel includes a first display area 10 and a second display area 20, the transmittance of the first display area 10 is greater than the transmittance 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 is provided with at least one auxiliary opening 220, and the auxiliary opening 220 is located in the first display area 10; an isolation structure 400, located on the side of the pixel defining layer 200 away from the substrate 100, including a plurality of isolation openings 410, the plurality of isolation openings 410 including a first isolation opening 411 located in the first display area 10, the isolation structure 400 includes a plurality of first isolation portions 412 arranged at intervals, the first isolation portions 412 enclose a first isolation opening 411, and the first isolation opening 411 is used to accommodate the light-emitting device 310; wherein 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 consistent with the previous description and will not be elaborated here.

[0150] It should be noted that the display panel of this embodiment can be combined with the display panel described above in whole or in part, which will not be described in detail 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; wherein, 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 a first opening density, 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 a second opening density, and the first opening density is 80% to 120% of the second opening density, for example, it may be 80%, 85%, 90%, 95%, 100%, 105%, 110%, 115% or 120%, etc. Therefore, the difference between the first opening density and the second opening density is appropriate. When the pixel opening 210 and the auxiliary opening 220 are prepared by an etching process, the etching rates of the first display area 10 and the second display area 20 are almost the same, and the first electrode layer 311 is hardly damaged or the damage to the first electrode layer 311 is greatly alleviated. Almost all the pixel openings 210 will expose part of the first electrode layer 311, and the first electrode layer 311 of the first display area 10 or the second display area 20 has a high flatness and the work function is hardly affected. 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 opening density is 90% to 110% of the second opening density. Thus, the difference between the first opening density and the second opening density is smaller, and the effect of improving the display panel manufacturing yield is more significant. In a more preferred embodiment, the first opening density is 100% of the second opening density. Thus, the difference between the first opening density and the second opening density is further reduced, and the display panel manufacturing yield is further improved.

[0153] In one embodiment, referring to Figure 3 The second display area 20 includes a sub-area 21 with the same area as the first display area 10, and the sub-area 21 is located in any area of ​​the second display area 20. The sum of the orthographic projection areas of the plurality of first pixel openings 211 and the plurality of auxiliary openings 220 in the first display area 10 on the substrate 100 is 80% to 120% of the orthographic projection area of ​​the second pixel opening 212 in the sub-area 21 on the substrate 100, for example, it can be 80%, 85%, 90%, 95%, 100%, 105%, 110%, 115% or 120%. Therefore, when the pixel opening 210 and the auxiliary opening 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, and the first electrode layer 311 is almost not damaged or the damage to the first electrode layer 311 is greatly alleviated, thereby improving the manufacturing yield of the display panel.

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

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

[0156] In one embodiment, the shape of the orthographic projection of the auxiliary opening 220 on the substrate 100 includes a circular

[0157] (Refer to Figure 1 ), rectangle (see Figure 6 ), cross (see Figure 7 ), X-shaped (please refer to Figure 8 ) and triangle (see Fig. 9). It can be understood that, in the first display area 10, the shape of the orthographic projection of the pixel opening 210 on the substrate 100 is generally circular or rectangular (for example, it can be a rectangle or a square, etc.), and when the orthographic projection of the auxiliary opening 220 on the substrate 100 is circular, the gap between the pixel opening 210 and the auxiliary opening 220 is relatively large, and the auxiliary opening 220 can be of other shapes, such as a rectangle, a cross, an X shape, and a triangle, etc., which is conducive to increasing the size of the auxiliary opening 220, so as to increase the area of ​​the auxiliary opening 220.

[0158] According to the arrangement position 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, and 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 shapes of the orthographic projections of the plurality of auxiliary openings 220 on the substrate 100 are the same, thereby facilitating the manufacture of the auxiliary openings 220 and reducing the difficulty of manufacturing the display panel.

[0160] In one embodiment, the orthographic projection areas of the plurality of auxiliary openings 220 on the substrate 100 are the same, thereby facilitating the manufacture of the auxiliary openings 220 and reducing the difficulty of manufacturing the display panel.

[0161] In one embodiment, the orthographic projection area of ​​the first pixel opening 211 of the same luminous color on the substrate 100 is smaller than the orthographic projection area of ​​the corresponding second pixel opening 212 on the substrate 100; the orthographic projection shape of the first pixel opening 211 located in the first display area 10 on the substrate 100 is the same as the orthographic projection 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 the manufacturing of the pixel opening 210 is facilitated.

[0162] In one embodiment, the auxiliary opening 220 has the same orthographic projection area as the pixel opening 210 on the substrate 100. Exemplarily, the auxiliary opening 220 has the same orthographic projection area as the first pixel opening 211 on the substrate 100, thereby further improving the etching uniformity of the first display area 10. A third aspect of the present application provides a method for preparing a display panel, referring to Fig.17 The schematic flow chart of the method for preparing a display panel is shown, and the method for preparing a display panel includes the following steps.

[0163] S100: providing a substrate.

[0164] It should be noted that the substrate is consistent with the previous description and will not be described in detail here.

[0165] S200: preparing a first electrode layer on one side of the substrate.

[0166] It should be noted that the first electrode layer is consistent with the above description and will not be elaborated herein.

[0167] S300: preparing a pixel defining material layer on a side of the first electrode layer facing 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 facing away from the substrate, and before the step of opening a plurality of pixel openings and at least one auxiliary opening in the pixel defining material layer, it also includes: preparing an isolation structure having a plurality of isolation openings on the side of the pixel defining material layer facing away from the substrate.

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

[0170] In one embodiment, the step of preparing an isolation structure having a plurality of isolation openings on a side of a pixel defining material layer facing away from a substrate includes: sequentially preparing a second isolation material layer and a first isolation material layer on a side of the pixel defining material layer facing away from the substrate; patterning the first isolation material layer and the second isolation material layer to obtain a plurality of isolation openings and a first portion and a second portion stacked thereon, wherein the first portion is located on a side of the second portion facing away from the substrate, and an orthographic projection of the second portion on the substrate is located within an orthographic projection of the first portion on the substrate.

[0171] In another embodiment, the step of preparing an isolation structure having a plurality of isolation openings on a side of a pixel defining material layer facing away from the substrate includes: sequentially preparing 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 facing away from the substrate; patterning the first isolation material layer, the second isolation material layer, and the third isolation material layer to obtain a plurality of isolation openings and a first part, a second part, and a third part stacked in sequence, the first part being located on a side of the second part facing away from the substrate, the orthographic projection of the second part on the substrate being located within the orthographic projection range of the first part on the substrate, and the orthographic projection of the second part on the substrate being located within the orthographic projection range of the third part on the substrate.

[0172] S400: opening a plurality of pixel openings and at least one auxiliary opening in a pixel defining material layer to obtain a pixel defining layer, wherein the auxiliary opening is located in a first display area.

[0173] In one embodiment, the step of opening 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; the photoresist 30 exposes a portion of the pixel defining material layer 40, and 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 for details). Fig.18); etching the pixel defining material layer 40 to obtain a pixel defining layer 200 (see Fig.19 ); removing the photoresist 30.

[0174] It can be understood that the patterned photoresist 30 exposes the positions corresponding to the pixel opening and the auxiliary opening, and the pixel opening and the auxiliary opening are obtained after etching the pixel defining material layer 40 to obtain the pixel defining layer.

[0175] In one embodiment, the method of etching the pixel defining material layer includes dry etching, such as plasma etching, etc. It can be understood that during the dry etching process, the etching rates of the first display area and the second display area are not much different, and during the etching process of the pixel defining material layer, the first electrode layer is almost not damaged, so that the flatness and work function of the first electrode layer are almost not affected, and the yield of the display panel is high.

[0176] S500: sequentially preparing a light-emitting functional layer and a second electrode layer 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 consistent with the above description and will not be described in detail here.

[0178] It can be understood that the preparation method of the light-emitting functional layer and the second electrode layer is the same as the conventional preparation method of the light-emitting functional layer and the second electrode layer, which will not be described in detail here.

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

[0180] A fourth aspect of the present application provides a display device, comprising the aforementioned display panel, or comprising 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 a conventional display device should have, such as a touch panel, a driving chip, etc., which will not be elaborated herein.

[0182] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0183] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A display panel, characterized in that: The display panel comprises a first display area and a second display area, and the light transmittance of the first display area is greater than the light transmittance of the second display area; The display panel comprises: substrate; A pixel defining layer, located at one side of the substrate, the pixel defining layer is provided with a plurality of pixel openings and at least one auxiliary opening, and the auxiliary opening is located in the first display area; A plurality of light emitting unit groups are provided, each of which comprises a plurality of light emitting devices, wherein at least a portion of the light emitting devices are located in the pixel openings, and the auxiliary openings are located between adjacent light emitting devices.

2. The display panel according to claim 1, characterized in that: The plurality of pixel openings include a plurality of first pixel openings and a plurality of second pixel openings, 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 orthographic projection area of ​​the first pixel opening on the substrate is smaller than the orthographic projection area of ​​the second pixel opening on the substrate; The first pixel opening density in the first display area is less than the second pixel opening density in the second display area; 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 a 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 a second opening density, and the first opening density is 80% to 120% of the second opening density; Preferably, the first opening density is 90% to 110% of the second opening density; Preferably, the first opening density is 100% of the second opening density; Preferably, the second display area includes a sub-area with the same area as the first display area, the sub-area is located in any area of ​​the second display area, and the sum of the orthographic projection areas of the plurality of the first pixel openings and the plurality of the auxiliary openings in the first display area on the substrate is 80% to 120% of the orthographic projection area of ​​the second pixel openings in the sub-area on the substrate; Preferably, the number of the second pixel openings in the sub-area is greater than the number of the first pixel openings in the first display area.

3. The display panel according to claim 1, characterized in that: In the first display area, in at least one of the light-emitting unit groups, a space surrounded by a plurality of the light-emitting devices has at least one auxiliary opening; Preferably, there is at least one auxiliary opening between adjacent light emitting devices; Preferably, the orthographic projection areas of the plurality of auxiliary openings on the substrate are the same.

4. The display panel according to claim 2, characterized in that: The shape of the orthographic projection of the auxiliary opening on the substrate includes at least one of a circle, a rectangle, a cross, an X, and a triangle; Preferably, the auxiliary opening has the same area as the orthographic projection of the pixel opening on the substrate; Preferably, the orthographic projection area of ​​the first pixel opening of the same luminous color on the substrate is smaller than the orthographic projection area of ​​the corresponding second pixel opening on the substrate; Preferably, an orthographic projection shape of a first pixel opening located in the first display area on the substrate is the same as an orthographic projection shape of the second pixel opening on the substrate.

5. The display panel according to claim 1, characterized in that: Also includes: An isolation structure is located on a side of the pixel defining layer away from the substrate, the isolation structure encloses a plurality of isolation openings, and the orthographic projections of the pixel openings on the substrate are located within the orthographic projection ranges of the isolation openings on the substrate; Preferably, at least part of the light emitting device is located in the connected isolation opening and the pixel opening.

6. The display panel according to claim 5, characterized in that: The isolation structure comprises a first portion and a second portion stacked together, the first portion is located on a side of the second portion away from the substrate, and an orthographic projection of the first portion on the substrate covers an orthographic projection of the second portion on the substrate; Preferably, the isolation structure further includes a third portion located on a side of the second portion close to the substrate, and an orthographic projection of the second portion on the substrate is located within a range of an orthographic projection of the third portion on the substrate.

7. The display panel according to claim 5 or 6, 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 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 a plurality of first isolation parts arranged at intervals, the first isolation parts enclosing the first isolation opening; Preferably, there is at least one auxiliary opening between adjacent first isolation parts; Preferably, 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; Preferably, the isolation structure comprises a second isolation portion located in the second display area, the second isolation portion is mesh-shaped, and the second isolation portion encloses a plurality of second isolation openings; The first isolation portion is electrically connected to the second isolation portion.

8. The display panel according to claim 6, characterized in that: The light-emitting device comprises a first electrode layer, a light-emitting functional layer, and a second electrode layer which are sequentially stacked, wherein 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, and the light-emitting functional layer and the second electrode layer are located in the connected pixel opening and the isolation opening; Preferably, the light-emitting device comprises 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, and an area of ​​a positive projection of a first electrode layer of the first light-emitting sub-device on the substrate is smaller than an area of ​​a positive projection of a first electrode layer of the second light-emitting sub-device on the substrate; Preferably, an orthographic projection of the auxiliary opening on the substrate is spaced apart from an orthographic projection of the first electrode layer of the first light-emitting sub-device on the substrate.

9. The display panel according to claim 8, characterized in that: The orthographic projection of the light-emitting functional layer on the substrate is located within the orthographic projection range of the second electrode layer on the substrate; Preferably, the light-emitting functional layer and the isolation structure are spaced apart, and the second electrode layer overlaps the isolation structure.

10. The display panel according to claim 8 or 9, characterized in that: Also includes: The first encapsulation layer is located on a side of the second electrode layer away from the substrate, and the first encapsulation layer includes a plurality of encapsulation parts, and the orthographic projections of the encapsulation parts on the substrate cover the orthographic projections of the second electrode layer on the substrate.

11. A display panel, characterized in that: The display panel comprises a first display area and a second display area, and the light transmittance of the first display area is greater than the light transmittance of the second display area; The display panel comprises: substrate; A pixel defining layer, located at one side of the substrate, the pixel defining layer is provided with at least one auxiliary opening, and the auxiliary opening is located in the first display area; an isolation structure, located on a side of the pixel defining layer away from the substrate, comprising a plurality of isolation openings, the plurality of isolation openings including a first isolation opening located in the first display area, the isolation structure comprising a plurality of first isolation portions arranged at intervals, the first isolation portions enclosing the first isolation opening, the first isolation opening being used to accommodate a light-emitting device; Wherein, the auxiliary opening is located between adjacent first isolation parts.

12. The display panel according to claim 11, characterized in that: The plurality of pixel openings include a plurality of first pixel openings and a plurality of second pixel openings, 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 orthographic projection area of ​​the first pixel opening on the substrate is smaller than the orthographic projection area of ​​the second pixel opening on the substrate; The first pixel opening density in the first display area is less than the second pixel opening density in the second display area; 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 a 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 a second opening density, and the first opening density is 80% to 120% of the second opening density; Preferably, the first opening density is 90% to 110% of the second opening density; Preferably, the first opening density is 100% of the second opening density; Preferably, the second display area includes a sub-area with the same area as the first display area, the sub-area is located in any area of ​​the second display area, and the sum of the orthographic projection areas of the plurality of the first pixel openings and the plurality of the auxiliary openings in the first display area on the substrate is 80% to 120% of the orthographic projection area of ​​the second pixel openings in the sub-area on the substrate; Preferably, the number of the second pixel openings in the sub-area is greater than the number of the first pixel openings in the first display area.

13. The display panel according to claim 11, characterized in that: There is at least one auxiliary opening between adjacent first isolation parts; Preferably, the orthographic projection areas of the plurality of auxiliary openings on the substrate are the same.

14. The display panel according to claim 11, characterized in that: The shape of the orthographic projection of the auxiliary opening on the substrate includes at least one of a circle, a rectangle, a cross, an X, and a triangle; Preferably, the auxiliary opening has the same area as the orthographic projection of the pixel opening on the substrate; Preferably, the orthographic projection area of ​​the first pixel opening of the same luminous color on the substrate is smaller than the orthographic projection area of ​​the corresponding second pixel opening on the substrate; Preferably, an orthographic projection shape of a first pixel opening located in the first display area on the substrate is the same as an orthographic projection shape of the second pixel opening on the substrate.

15. A method for preparing a display panel, characterized in that: include: providing a substrate; Preparing a first electrode layer on one side of the substrate; Preparing a pixel defining material layer on a side of the first electrode layer facing away from the substrate; A plurality of pixel openings and at least one auxiliary opening are opened in the pixel defining material layer to obtain a pixel defining layer, wherein the auxiliary opening is located in the first display area; A light-emitting functional layer and a second electrode layer are sequentially prepared in the pixel opening to form a light-emitting device.

16. The preparation method according to claim 15, characterized in that: After the step of preparing a pixel defining material layer on the side of the first electrode layer facing away from the substrate and before the step of opening a plurality of pixel openings and at least one auxiliary opening in the pixel defining material layer, the method further includes: Prepare an isolation structure having a plurality of isolation openings on a side of the pixel defining material layer facing away from the substrate; Preferably, the step of preparing an isolation structure having a plurality of isolation openings on a side of the pixel defining material layer facing away from the substrate comprises: A second isolation material layer and a first isolation material layer are sequentially prepared on a side of the pixel defining material layer away from the substrate; the first isolation material layer and the second isolation material layer are patterned to obtain a plurality of isolation openings and a first portion and a second portion stacked, wherein the first portion is located on a side of the second portion away from the substrate, and an orthographic projection of the second portion on the substrate is located within an 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 a side of the pixel defining material layer facing away from the substrate; the first isolation material layer, the second isolation material layer and the third isolation material layer are patterned to obtain a plurality of isolation openings and a first portion, a second portion and a third portion stacked in sequence, wherein the first portion is located on a side of the second portion facing away from the substrate, the orthographic projection of the second portion on the substrate is located within the orthographic projection range of the first portion on the substrate, and the orthographic projection of the second portion on the substrate is located within the orthographic projection range of the third portion on the substrate.

17. The preparation method according to claim 16, characterized in that: The step of opening a plurality of pixel openings and at least one auxiliary opening in the pixel defining material layer comprises: A patterned photoresist is prepared on a side of the isolation structure facing away from the substrate; the photoresist exposes a portion of the pixel defining material layer, and an orthographic projection of the photoresist on the substrate covers an orthographic projection of the isolation structure on the substrate; Etching the pixel defining material layer to obtain the pixel defining layer; Preferably, the method of etching the pixel defining material layer includes dry etching.

18. A display device, characterized in that: A display panel comprising any one of claims 1 to 14, or a display panel prepared by the preparation method according to any one of claims 15 to 17.

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