Display panel, preparation method of display panel and electronic equipment

Abstract

The embodiment of the invention provides a display panel, a preparation method of the display panel and electronic equipment, and relates to the technical field of display, the display panel comprises a substrate, an organic insulating layer, a pixel defining layer, an isolation structure and a light emitting unit, the pixel defining layer defines a plurality of pixel openings and a plurality of first exhaust through holes, the plurality of first exhaust through holes are located in the second display area, and part of the organic insulating layer is exposed out of the first exhaust through holes; the isolation structure is enclosed to form a plurality of isolation openings and a plurality of second exhaust through holes, the plurality of second exhaust through holes are located in the second display area, the isolation openings are communicated with the corresponding pixel openings, and the second exhaust through holes are communicated with the corresponding first exhaust through holes; at least part of the light-emitting unit is located in the isolation opening. According to the display panel, water vapor in the organic insulating layer is not prone to intruding into the light-emitting units, so that the corresponding light-emitting units are not prone to generating dark spots, and then the display effect 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, a method for manufacturing a display panel, and an electronic device. Background Art

[0002] Organic light-emitting diodes (OLEDs) and flat-panel displays based on technologies such as light-emitting diodes (LEDs) have become a mainstream display panel technology, widely used in a variety of consumer electronics products, including mobile phones, televisions, laptops, and desktop computers, due to their advantages of high image quality, power efficiency, thin design, and wide application range. Traditionally, the production of display panels involves patterning the luminous pixels using a fine metal mask (FMM). While FMM technology is mature and boasts extensive mass production experience, it also suffers from limited precision, high development costs, and long development cycles. FMM-free technology eliminates the limitations of traditional OLED processes on display size, resolution, and other performance characteristics, offering the advantages of high performance, full-scale scalability, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A describe the non-fine metal mask technology for reference.

[0003] However, there are still some problems with display panels that need to be solved urgently. Summary of the Invention

[0004] In order to overcome the technical problems mentioned in the above technical background, an embodiment of the present application provides a display panel, wherein the display panel includes a first display area and a second display area surrounding at least a portion of the first display area, and the display panel includes: substrate; an organic insulating layer, located on one side of the substrate; a pixel defining layer, located on a side of the organic insulating layer away from the substrate, the pixel defining layer defining a plurality of pixel openings and a plurality of first exhaust holes, the plurality of first exhaust holes being located in the second display area, the first exhaust holes partially exposing the organic insulating layer; 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 and a plurality of second exhaust through-holes, the plurality of isolation openings being located in the first display area and the second display area, the plurality of second exhaust through-holes being located in the second display area, the isolation openings being in communication with the corresponding pixel openings, and the second exhaust through-holes being in communication with the corresponding first exhaust through-holes; A light-emitting unit, at least a portion of which is located in the isolation opening.

[0005] In some possible implementations, an orthographic projection of the first exhaust through-hole on the substrate is located within an orthographic projection of the second exhaust through-hole on the substrate.

[0006] In some possible implementations, the light-emitting unit includes a first electrode, the pixel opening exposes a portion of the first electrode, and an orthographic projection of the first electrode on the substrate is spaced apart from an orthographic projection of the first exhaust hole on the substrate.

[0007] In some possible implementations, the orthographic projection of the second exhaust hole on the substrate and the orthographic projection of the isolation opening on the substrate are spaced apart.

[0008] In some possible implementations, the orthographic projection of the first exhaust hole on the substrate is spaced apart from the orthographic projection of the pixel opening on the substrate; The pixel defining layer includes an inorganic material.

[0009] In some possible embodiments, along a direction parallel to the substrate, the width of the second exhaust hole on a side away from the substrate is greater than or equal to half the width of the isolation structure between two adjacent isolation openings, and is less than the width of the isolation structure between two adjacent isolation openings.

[0010] In some possible embodiments, the display panel further includes a pixel circuit located between the substrate and the organic insulating layer, and the organic insulating layer has a connecting through-hole penetrating the organic insulating layer in a direction away from the substrate, and the light-emitting unit includes a first electrode, which is electrically connected to the pixel circuit through the connecting through-hole.

[0011] In some possible implementations, the isolation structure further encloses a plurality of first light-transmitting openings, and the plurality of first light-transmitting openings are located in the first display area.

[0012] In some possible implementations, the orthographic projection of the first light-transmitting opening on the substrate and the orthographic projection of the isolation opening on the substrate are spaced apart.

[0013] In some possible embodiments, the pixel defining layer further defines a plurality of second light-transmitting openings, the plurality of second light-transmitting openings are located in the first display area, the second light-transmitting openings are connected to the corresponding first light-transmitting openings, and the second light-transmitting openings partially expose the organic insulating layer.

[0014] In some possible implementations, the orthographic projection of the second light-transmitting opening on the substrate is located within the orthographic projection of the first light-transmitting opening on the substrate; The orthographic projection of the second light-transmitting opening on the substrate is spaced apart from the orthographic projection of the pixel opening on the substrate.

[0015] In some possible implementations, the display panel further includes an encapsulation unit located on a side of the light-emitting unit away from the substrate, and a portion of the encapsulation unit extends from a side of the isolation structure toward the isolation opening to a side of the isolation structure away from the substrate; There are multiple packaging units, and the multiple packaging units are spaced apart on a side of the isolation structure away from the substrate; A gap is formed between the packaging unit located at a side of the isolation structure away from the substrate and the side of the isolation structure away from the substrate.

[0016] In some possible implementations, the display panel further includes a second encapsulation layer located on a side of the encapsulation unit away from the substrate, and a third encapsulation layer located on a side of the second encapsulation layer away from the substrate; The materials of the encapsulation unit and the third encapsulation layer both include inorganic materials; The material of the second encapsulation layer includes organic material.

[0017] In some possible implementations, the isolation structure includes a first isolation portion and a second isolation portion stacked sequentially in a direction away from the substrate, an orthographic projection of a side of the first isolation portion away from the substrate on the substrate is located within an orthographic projection of the second isolation portion on the substrate, and an orthographic projection of a side of the first isolation portion away from the substrate on the substrate has a smaller area than an orthographic projection of the second isolation portion on the substrate; The isolation structure includes a conductive material, the light-emitting unit includes a light-emitting functional portion and a second electrode sequentially stacked in a direction away from the substrate, and the second electrode is electrically connected to the first isolation portion.

[0018] In some possible implementations, the isolation structure further includes a third isolation portion located on a side of the first isolation portion facing the substrate, and the second electrode is electrically connected to the third isolation portion; The material of the third isolation portion includes molybdenum or titanium; and / or the material of the first isolation portion includes aluminum, silver or copper; and / or the material of the second isolation portion includes titanium or molybdenum.

[0019] In some possible implementations, the present application further provides a method for manufacturing a display panel, the display panel including a first display area and a second display area surrounding at least a portion of the first display area, the method comprising: providing a substrate; forming an organic insulating layer on one side of the substrate; forming a pixel defining layer on a side of the organic insulating layer away from the substrate and forming an isolation structure on a side of the pixel defining layer away from the substrate, wherein the pixel defining layer defines a plurality of pixel openings and a plurality of first exhaust through-holes, and the isolation structure encloses a plurality of isolation openings and a plurality of second exhaust through-holes, wherein the plurality of isolation openings are located in the first display area and the second display area, and the plurality of second exhaust through-holes and the plurality of first exhaust through-holes are both located in the second display area, the isolation openings are in communication with the corresponding pixel openings, the second exhaust through-holes are in communication with the corresponding first exhaust through-holes, and the first exhaust through-holes partially expose the organic insulating layer; A light emitting unit is formed, wherein at least a portion of the light emitting unit is located within the isolation opening.

[0020] In some possible implementations, the step of forming a pixel defining layer on a side of the organic insulating layer away from the substrate and forming an isolation structure located on a side of the pixel defining layer away from the substrate includes: forming a pixel defining material layer on a side of the organic insulating layer away from the substrate, and patterning the pixel defining material layer to form a pixel defining material layer including a first exhaust hole; forming an isolation material layer on a side of the pixel defining material layer away from the substrate; The isolation material layer and the pixel definition material layer are patterned in sequence to form an isolation structure and a pixel definition layer respectively.

[0021] In some possible implementations, the step of forming a pixel defining layer on a side of the organic insulating layer away from the substrate and forming an isolation structure located on a side of the pixel defining layer away from the substrate includes: forming a pixel defining material layer and an isolation material layer in sequence on a side of the organic insulating layer away from the substrate; The isolation material layer and the pixel definition material layer are patterned in sequence to form an isolation structure and a pixel definition layer respectively.

[0022] In some possible implementations, the present application further provides an electronic device, which includes the display panel described in the present application, or includes a display panel prepared by the method for preparing the display panel described in the present application.

[0023] Compared with the prior art, this application has the following beneficial effects: The present application provides a display panel, a method for preparing a display panel, and an electronic device. By providing a first exhaust hole on a pixel defining layer that exposes a portion of an organic insulating layer, and providing a second exhaust hole on an isolation structure that is connected to the first exhaust hole, water vapor in the organic insulating layer is not easily able to invade the light-emitting unit, thereby making the corresponding light-emitting unit less likely to produce dark spots, thereby improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic top view of a display panel provided in an embodiment of the present application; Figure 2 A schematic diagram of a partial top view of the second display area of ​​the display panel provided in an embodiment of the present application; Figure 3 Provided in the embodiments of this application Figure 2 One of the cross-sectional diagrams at AA in the middle; Figure 4 Provided in the embodiments of this application Figure 2 The second cross-sectional diagram at AA in the middle; Figure 5 A schematic partial top view of a first display area of ​​a display panel provided in an embodiment of the present application; Figure 6 Provided in the embodiments of this application Figure 5 One of the cross-sectional diagrams at the middle BB; Figure 7 Provided in the embodiments of this application Figure 5 The second cross-sectional diagram at the middle BB; Figure 8 A cross-sectional schematic diagram of a display panel provided in an embodiment of the present application includes a packaging unit; Figure 9 A cross-sectional schematic diagram of a display panel provided in an embodiment of the present application including a second encapsulation layer and a third encapsulation layer; Figure 10 A schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application; Figure 11 A cross-sectional schematic diagram of forming a pixel defining material layer on a side of an organic insulating layer away from a substrate according to an embodiment of the present application; Figure 12 A schematic cross-sectional view of a pixel defining material layer after patterning according to an embodiment of the present application; Figure 13 A cross-sectional view of forming an isolation material layer on a side of a pixel defining material layer away from a substrate provided in an embodiment of the present application; Figure 14 This is a cross-sectional view of the isolation material layer after patterning provided in an embodiment of the present application; Figure 15 This is a cross-sectional view of the pixel defining material layer after patterning according to an embodiment of the present application; Figure 16 The embodiment of the present application provides a cross-sectional view of sequentially forming a pixel defining material layer and an isolation material layer on a side of the organic insulating layer away from the substrate.

[0026] Figure numerals: 1. substrate; 2. organic insulating layer; 21. connecting through hole; 3. first electrode; 4. light-emitting functional part; 5. second electrode; 6. light-emitting unit; 7. pixel defining layer; 71. first exhaust through hole; 72. pixel opening; 73. second light-transmitting opening; 8. isolation structure; 81. first isolation part; 82. second isolation part; 83. third isolation part; 9. isolation opening; 10. second exhaust through hole; 11. pixel circuit; 12. first light-transmitting opening; 13. packaging unit; 14. second packaging layer; 15. third packaging layer; 16. pixel defining material layer; 17. isolation material layer. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of 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. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0029] 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, it does not need to be further defined or explained in subsequent drawings.

[0030] In the description of this application, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] It should be noted that, in the absence of conflict, different features in the embodiments of the present application can be combined with each other.

[0032] Increasing the density of light-emitting units (i.e., pixel density) in display panels is an important way to enhance display quality. However, current display panels manufactured using fine metal mask (FMM) evaporation technology are limited by technical limitations and cannot achieve further increases in light-emitting unit density. To address this issue, some display panels incorporate isolation structures. During full-layer vapor deposition of the light-emitting functional unit and the second electrode, these are disconnected at the isolation structure. Through multiple vapor deposition and etching processes (i.e., light-emitting unit patterning), light-emitting units of different colors can be formed within the different isolation openings.

[0033] The display panel in the related art includes a substrate, an organic insulating layer located on one side of the substrate, and a light-emitting unit located on a side of the organic insulating layer away from the substrate. The material of the organic insulating layer includes organic material, and water vapor is easily transferred in the organic material. Therefore, the water vapor in the organic insulating layer is easily transferred to the light-emitting unit, causing the light-emitting unit to fail and produce dark spots, which ultimately affects the display effect of the display panel.

[0034] In order to solve the above-mentioned technical problems, the specific implementation scheme of the present application will be described in detail below with reference to the accompanying drawings.

[0035] See Figure 1-Figure 3 This embodiment provides a display panel, which includes a first display area AA1 and a second display area AA2 surrounding at least part of the first display area AA1. The display panel includes a substrate 1, an organic insulating layer 2, a pixel defining layer 7, an isolation structure 8 and a light-emitting unit 6.

[0036] The organic insulating layer 2 is located on one side of the substrate 1 .

[0037] The pixel defining layer 7 is located on the side of the organic insulating layer 2 away from the substrate 1 . The pixel defining layer 7 defines a plurality of pixel openings 72 and a plurality of first exhaust holes 71 . The plurality of first exhaust holes 71 are located in the second display area AA2 . The first exhaust holes 71 partially expose the organic insulating layer 2 .

[0038] The isolation structure 8 is located on the side of the pixel defining layer 7 away from the substrate 1. The isolation structure 8 encloses a plurality of isolation openings 9 and a plurality of second exhaust holes 10. The plurality of isolation openings 9 are located in the first display area AA1 and the second display area AA2. The plurality of second exhaust holes 10 are located in the second display area AA2. The isolation openings 9 are connected to the corresponding pixel openings 72, and the second exhaust holes 10 are connected to the corresponding first exhaust holes 71.

[0039] At least a portion of the light emitting unit 6 is located in the isolation opening 9 .

[0040] The pixel defining layer 7 is made of an inorganic material, through which water vapor is not easily transferred. The isolation structure 8 is made of a metal material, through which water vapor is also not easily transferred. Therefore, in the related art, water vapor in the organic insulating layer 2 has no release path at the pixel defining layer 7 and the isolation structure 8. As a result, the water vapor in the organic insulating layer 2 easily invades the light-emitting unit 6, causing dark spots in the corresponding light-emitting unit 6.

[0041] In this embodiment, in the second display area AA2 of the display panel, a first exhaust hole 71 exposing a portion of the organic insulating layer 2 is provided on the pixel defining layer 7, and a second exhaust hole 10 connected to the first exhaust hole 71 is provided on the isolation structure 8. The first exhaust hole 71 and the second exhaust hole 10 form a water vapor release path, and the water vapor in the organic insulating layer 2 can be discharged in time through the first exhaust hole 71 and the second exhaust hole 10, so that the water vapor in the organic insulating layer 2 is not easy to invade the light-emitting unit 6, and then the corresponding light-emitting unit 6 is not easy to produce dark spots, which can ultimately improve the display effect of the display panel.

[0042] Based on the above design, this embodiment provides a first exhaust hole 71 on the pixel defining layer 7 that exposes a portion of the organic insulating layer 2, and provides a second exhaust hole 10 on the isolation structure 8 that is connected to the first exhaust hole 71. This can prevent water vapor in the organic insulating layer 2 from easily invading the light-emitting unit 6, thereby making the corresponding light-emitting unit 6 less likely to produce dark spots, thereby improving the display effect of the display panel.

[0043] For some possible implementations, see again Figure 3The light-emitting unit 6 includes a first electrode 3, a light-emitting functional portion 4, and a second electrode 5, which are stacked in sequence in a direction away from the substrate 1. The orthographic projection of the pixel opening 72 on the substrate 1 is located within the orthographic projection of the isolation opening 9 on the substrate 1, and the orthographic projection area of ​​the pixel opening 72 on the substrate 1 is smaller than the orthographic projection area of ​​the isolation opening 9 on the substrate 1.

[0044] The provision of the isolation structure 8 enables the display panel to form film layers of light-emitting units 6 of different colors in different isolation openings 9 without the need for a fine mask. When forming the light-emitting material layer, the light-emitting material layer is separated by the isolation structure 8 to form a plurality of spaced light-emitting functional units 4. When forming the second electrode material layer, the second electrode material layer is separated by the isolation structure 8 to form a plurality of spaced second electrodes 5. The isolation structure 8 comprises a conductive material, and the second electrodes 5 are electrically connected to the isolation structure 8. A first electrode 3, a light-emitting functional unit 4, and a second electrode 5 form a light-emitting unit 6. The first electrode 3 can be an anode, and the second electrode 5 can be a cathode.

[0045] In this way, different light-emitting units 6 can be made independent of each other, thereby reducing crosstalk between adjacent light-emitting units 6 and improving the display effect of the display panel. At the same time, due to the presence of the isolation structure 8, the light-emitting material layer and the second electrode material layer in the light-emitting unit 6 of each color in the display panel can be first prepared on the entire surface and then patterned, thereby eliminating the need for a fine mask and further reducing the production cost of the display panel.

[0046] In the related art, since there is no water vapor release path on the pixel definition layer 7 and the isolation structure 8 of the display panel, the water vapor in the organic insulating layer 2 will cause the silver in the first electrode 3 to precipitate, making the first electrode 3 and the second electrode 5 unable to be energized normally, thereby causing the corresponding light-emitting unit 6 to produce dark spots.

[0047] In the present embodiment, since a first exhaust hole 71 exposing a portion of the organic insulating layer 2 is provided on the pixel defining layer 7, and a second exhaust hole 10 connected to the first exhaust hole 71 is provided on the isolation structure 8, the first exhaust hole 71 and the second exhaust hole 10 form a water vapor release path, and the water vapor in the organic insulating layer 2 can be discharged in time through the first exhaust hole 71 and the second exhaust hole 10. Therefore, the water vapor in the organic insulating layer 2 is not likely to cause the silver in the first electrode 3 to precipitate, and the first electrode 3 and the second electrode 5 can be energized normally, so that the corresponding light-emitting unit 6 is not likely to produce dark spots.

[0048] For some possible implementations, see again Figure 3 The orthographic projection of the first exhaust through hole 71 on the substrate 1 is located within the orthographic projection of the second exhaust through hole 10 on the substrate 1 .

[0049] If the first exhaust through-hole 71 is larger than the second exhaust through-hole 10 , the portion of the isolation structure 8 close to the substrate 1 may be in a suspended state, thereby affecting the stability of the isolation structure 8 .

[0050] In this embodiment, the orthographic projection of the first exhaust hole 71 on the substrate 1 is set to be located within the orthographic projection of the second exhaust hole 10 on the substrate 1. In this way, the stability of the isolation structure 8 is not affected without affecting the discharge of water vapor in the organic insulating layer 2.

[0051] Optionally, the pixel opening 72 exposes a portion of the first electrode 3 , and an orthographic projection of the first electrode 3 on the substrate 1 is spaced apart from an orthographic projection of the first exhaust hole 71 on the substrate 1 .

[0052] The first electrode 3 is located on the side of the organic insulating layer 2 away from the substrate 1. If the orthographic projection of the first electrode 3 on the substrate 1 partially overlaps with the orthographic projection of the first exhaust hole 71 on the substrate 1, the first electrode 3 will block the discharge of water vapor in the organic insulating layer 2.

[0053] In this embodiment, the orthographic projection of the first electrode 3 on the substrate 1 is set to be spaced apart from the orthographic projection of the first exhaust hole 71 on the substrate 1, that is, the orthographic projection of the first electrode 3 on the substrate 1 does not overlap with the orthographic projection of the first exhaust hole 71 on the substrate 1, and the first electrode 3 will not affect the effect of the water vapor in the organic insulating layer 2 being discharged from the first exhaust hole 71.

[0054] For some possible implementations, see again Figure 2 and Figure 3 The orthographic projection of the second exhaust hole 10 on the substrate 1 is spaced apart from the orthographic projection of the isolation opening 9 on the substrate 1 .

[0055] Optionally, an orthographic projection of the first exhaust hole 71 on the substrate 1 and an orthographic projection of the pixel opening 72 on the substrate 1 are spaced apart.

[0056] The first exhaust through hole 71 does not affect the arrangement of the pixel opening 72 , and the second exhaust through hole 10 does not affect the arrangement of the isolation opening 9 . Thus, the first exhaust through hole 71 and the second exhaust through hole 10 do not affect the normal display of the light emitting unit 6 .

[0057] For some possible implementations, see again Figure 2 and Figure 3 , along a direction parallel to the substrate 1 , a width D1 of the second exhaust through hole 10 away from the substrate 1 is greater than or equal to half of a width D2 of the isolation structure 8 between two adjacent isolation openings 9 , and is less than a width D2 of the isolation structure 8 between two adjacent isolation openings 9 .

[0058] In this way, without affecting the normal display of the light-emitting unit 6 in the isolation opening 9, the second exhaust hole 10 can be set as large as possible, thereby further improving the effect of discharging water vapor in the organic insulating layer 2 from the first exhaust hole 71 and the second exhaust hole 10.

[0059] For some possible implementations, see Figure 4 The display panel also includes a pixel circuit 11 located between the substrate 1 and the organic insulating layer 2. Along the direction Z away from the substrate 1, the organic insulating layer 2 has a connecting through-hole 21 that penetrates the organic insulating layer 2. The first electrode 3 is electrically connected to the pixel circuit 11 through the connecting through-hole 21.

[0060] The pixel circuit 11 can provide relevant signals to the first electrode 3 to drive the corresponding light-emitting unit 6 to emit light.

[0061] For some possible implementations, see Figure 5 and Figure 6 The isolation structure 8 further encloses and forms a plurality of first light-transmitting openings 12 , and the plurality of first light-transmitting openings 12 are located in the first display area AA1 .

[0062] A photosensitive device is provided under the screen of the first display area AA1, and external light reaches the photosensitive device through the first light-transmitting opening 12 to realize related functions of the photosensitive device, such as a camera receiving external light to realize a camera function.

[0063] For some possible implementations, see Figure 5 and Figure 7 The pixel defining layer 7 further defines a plurality of second light-transmitting openings 73 . The plurality of second light-transmitting openings 73 are located in the first display area AA1 . The second light-transmitting openings 73 are connected to the corresponding first light-transmitting openings 12 . The second light-transmitting openings 73 partially expose the organic insulating layer 2 .

[0064] On the one hand, external light can more easily reach the under-screen photosensitive device of the first display area AA1 through the second light-transmitting opening 73, thereby improving the light transmission effect of the display panel; on the other hand, in the first display area AA1, water vapor in the organic insulating layer 2 can also be discharged through the second light-transmitting opening 73 and the first light-transmitting opening 12, thereby further improving the discharge effect of water vapor in the organic insulating layer 2.

[0065] Similarly, the first exhaust holes 71 and the second exhaust holes 10 in the second display area AA2 can also increase the transmittance of the display panel, which is more conducive to improving the relevant characteristics of the transparent screen.

[0066] Preferably, the orthographic projection of the second light-transmitting opening 73 on the substrate 1 is located within the orthographic projection of the first light-transmitting opening 12 on the substrate 1 .

[0067] If the second light-transmitting opening 73 is set larger than the first light-transmitting opening 12 , the portion of the isolation structure 8 close to the substrate 1 may be in a suspended state, thereby affecting the stability of the isolation structure 8 .

[0068] In this embodiment, the orthographic projection of the second light-transmitting opening 73 on the substrate 1 is set to be located within the orthographic projection of the first light-transmitting opening 12 on the substrate 1. In this way, the stability of the isolation structure 8 will not be affected without affecting the external light reaching the photosensitive device under the screen.

[0069] Optionally, the orthographic projection of the first light-transmitting opening 12 on the substrate 1 and the orthographic projection of the isolation opening 9 on the substrate 1 are spaced apart.

[0070] Optionally, an orthographic projection of the second light-transmitting opening 73 on the substrate 1 and an orthographic projection of the pixel opening 72 on the substrate 1 are spaced apart.

[0071] Thus, in the first display area AA1 , the first light-transmitting opening 12 does not affect the isolation opening 9 , and the second light-transmitting opening 73 does not affect the pixel opening 72 . Therefore, the first light-transmitting opening 12 and the second light-transmitting opening 73 do not affect the normal display of the light-emitting unit.

[0072] For some possible implementations, see Figure 8 The display panel further includes an encapsulation unit 13 located on a side of the light emitting unit 6 away from the substrate 1 . Part of the encapsulation unit 13 extends from the side of the isolation structure 8 toward the isolation opening 9 to the side of the isolation structure 8 away from the substrate 1 .

[0073] Optionally, there are multiple encapsulation units 13 , and the multiple encapsulation units 13 are arranged at intervals on a side of the isolation structure 8 away from the substrate 1 .

[0074] Optionally, a gap exists between the encapsulation unit 13 located on the side of the isolation structure 8 away from the substrate 1 and the side of the isolation structure 8 away from the substrate 1 .

[0075] During the patterning process of the light-emitting unit 6 , the first packaging material layer is disconnected at the isolation structure 8 to form the packaging unit 13 . The packaging unit 13 can completely and independently package the corresponding light-emitting unit 6 , thereby improving the display characteristics of the display panel.

[0076] For some possible implementations, see Figure 9 The display panel further includes a second encapsulation layer 14 located on a side of the encapsulation unit 13 away from the substrate 1 and a third encapsulation layer 15 located on a side of the second encapsulation layer 14 away from the substrate 1 .

[0077] Optionally, the materials of the encapsulation unit 13 and the third encapsulation layer 15 both include inorganic materials, and the material of the second encapsulation layer 14 includes organic materials.

[0078] For example, the encapsulation unit 13 and the third encapsulation layer 15 can be formed by chemical vapor deposition (CVD), and the second encapsulation layer 14 can be formed by inkjet printing (IJP). The second encapsulation layer 14 and the third encapsulation layer 15 can provide a better encapsulation effect on the light-emitting unit 6, thereby further improving the encapsulation quality of the display panel.

[0079] During the manufacturing process of the display panel, the organic insulating layer 2 absorbs external moisture when exposed. Before forming the second encapsulation layer 14, the display panel undergoes a high-temperature or vacuum process. During the high-temperature or vacuum process, the moisture in the organic insulating layer 2 is discharged through the first exhaust holes 71, the second exhaust holes 10, the second light-transmitting openings 73, and the first light-transmitting openings 12. In this way, the moisture in the organic insulating layer 2 can be discharged in a timely manner, making it difficult for the moisture in the organic insulating layer 2 to invade the light-emitting unit 6.

[0080] When forming the second encapsulation layer 14 , the second encapsulation layer 14 may fill the first exhaust through-hole 71 , the second exhaust through-hole 10 , the second light-transmitting opening 73 , and the first light-transmitting opening 12 .

[0081] For some possible implementations, see again Figure 8 The isolation structure 8 includes a first isolation portion 81 and a second isolation portion 82 which are stacked in sequence in a direction away from the substrate 1. The orthographic projection of the side of the first isolation portion 81 away from the substrate 1 on the substrate 1 is located within the orthographic projection of the second isolation portion 82 on the substrate 1. The area of ​​the orthographic projection of the side of the first isolation portion 81 away from the substrate 1 on the substrate 1 is smaller than the area of ​​the orthographic projection of the second isolation portion 82 on the substrate 1.

[0082] Because the second isolating portion 82 is located on the side of the first isolating portion 81 away from the substrate 1 and the lateral width of the second isolating portion 82 is greater than the lateral width of the first isolating portion 81 in a plane parallel to the substrate 1, the second isolating portion 82 disconnects the light-emitting material layer and the second electrode material layer at the isolation structure 8. Thus, the isolation structure 8 formed by the first isolating portion 81 and the second isolating portion 82 makes it easier to independently package each light-emitting unit 6, thereby improving the packaging yield of the display panel.

[0083] Optionally, see again Figure 8 The isolation structure 8 includes a conductive material, and the second electrode 5 is electrically connected to the first isolation portion 81. The first isolation portion 81 includes a conductive material, and the second electrode 5 corresponding to the light-emitting unit 6 extends to contact the sidewall of the first isolation portion 81 to achieve electrical connection between the second electrode 5 corresponding to the light-emitting unit 6 and the first isolation portion 81.

[0084] For some possible implementations, see again Figure 9 The isolation structure 8 further includes a third isolation portion 83 located on a side of the first isolation portion 81 facing the substrate 1 , and the second electrode 5 is electrically connected to the third isolation portion 83 .

[0085] Optionally, the material of the third isolation portion 83 includes molybdenum or titanium; and / or the material of the first isolation portion 81 includes aluminum, silver or copper; and / or the material of the second isolation portion 82 includes titanium or molybdenum.

[0086] The third isolation portion 83 protrudes toward the center of the isolation opening 9 relative to the first isolation portion 81. The third isolation portion 83 includes a conductive material. The second electrode 5 corresponding to the light-emitting unit 6 extends to overlap with the third isolation portion 83 to achieve electrical connection between the second electrode 5 corresponding to the light-emitting unit 6 and the third isolation portion 83.

[0087] For some possible implementations, see Figure 1 、 Figure 3 and Figure 10 The present application also provides a method for manufacturing a display panel, wherein the display panel includes a first display area AA1 and a second display area AA2 surrounding at least a portion of the first display area AA1, the method comprising: S10: providing a substrate 1.

[0088] S11 : forming an organic insulating layer 2 on one side of the substrate 1 .

[0089] S12: A pixel defining layer 7 is formed on the side of the organic insulating layer 2 away from the substrate 1, and an isolation structure 8 is formed on the side of the pixel defining layer 7 away from the substrate 1. The pixel defining layer 7 defines a plurality of pixel openings 72 and a plurality of first exhaust holes 71. The isolation structure 8 encloses a plurality of isolation openings 9 and a plurality of second exhaust holes 10. The plurality of isolation openings 9 are located in the first display area AA1 and the second display area AA2. The plurality of second exhaust holes 10 and the plurality of first exhaust holes 71 are both located in the second display area AA2. The isolation openings 9 are connected to the corresponding pixel openings 72. The second exhaust holes 10 are connected to the corresponding first exhaust holes 71. The first exhaust holes 71 expose part of the organic insulating layer 2.

[0090] S13 : forming a light emitting unit 6 , wherein at least a portion of the light emitting unit 6 is located in the isolation opening 9 .

[0091] In the display panel formed by the above method, in the second display area AA2 of the display panel, a first exhaust hole 71 exposing a portion of the organic insulating layer 2 is provided on the pixel defining layer 7, and a second exhaust hole 10 connected to the first exhaust hole 71 is provided on the isolation structure 8. The first exhaust hole 71 and the second exhaust hole 10 form a water vapor release path, and the water vapor in the organic insulating layer 2 can be discharged in time through the first exhaust hole 71 and the second exhaust hole 10, so that the water vapor in the organic insulating layer 2 is not easy to invade the light-emitting unit 6, and then the corresponding light-emitting unit 6 is not easy to produce dark spots, which can ultimately improve the display effect of the display panel.

[0092] During the process of forming the light emitting unit 6 , the material of the light emitting unit 6 in the first exhaust through hole 71 and the second exhaust through hole 10 is removed to improve the light transmittance of the first exhaust through hole 71 and the second exhaust through hole 10 .

[0093] Two implementations of forming the pixel defining layer 7 and the isolation structure 8 are described below.

[0094] In the first embodiment, the steps of forming the pixel defining layer 7 on the side of the organic insulating layer 2 away from the substrate 1 and forming the isolation structure 8 on the side of the pixel defining layer 7 away from the substrate 1 include: See Figure 11 and Figure 12 A pixel defining material layer 16 is formed on a side of the organic insulating layer 2 away from the substrate 1 , and the pixel defining material layer 16 is patterned to form the pixel defining material layer 16 including the first exhaust hole 71 .

[0095] See Figure 13 An isolation material layer 17 is formed on a side of the pixel defining material layer 16 away from the substrate 1 .

[0096] See Figure 14 and Figure 15 , the isolation material layer 17 and the pixel definition material layer 16 are patterned in sequence to form an isolation structure 8 and a pixel definition layer 7 respectively.

[0097] In this embodiment, after the pixel defining material layer 16 is formed, the pixel defining material layer 16 is first patterned to form a first exhaust hole 71 on the pixel defining material layer 16 in the second display area AA2, and simultaneously form a second light-transmitting opening 73 on the pixel defining material layer 16 in the first display area AA1. Then, an isolation material layer 17 is formed. Finally, the isolation material layer 17 and the pixel defining material layer 16 are patterned to form a second exhaust hole 10 on the isolation structure 8 in the first display area AA1, and simultaneously form a first light-transmitting opening 12 on the isolation structure 8 in the second display area AA2, and form a pixel defining layer 7 including a pixel opening 72.

[0098] In the second embodiment, the steps of forming the pixel defining layer 7 on the side of the organic insulating layer 2 away from the substrate 1 and forming the isolation structure 8 on the side of the pixel defining layer 7 away from the substrate 1 include: See Figure 16 A pixel defining material layer 16 and an isolation material layer 17 are sequentially formed on a side of the organic insulating layer 2 away from the substrate 1 .

[0099] Please see again Figure 15 , the isolation material layer 17 and the pixel definition material layer 16 are patterned in sequence to form an isolation structure 8 and a pixel definition layer 7 respectively.

[0100] In this embodiment, after the pixel defining material layer 16 and the isolation material layer 17 are formed, the isolation material layer 17 is patterned to simultaneously form the isolation opening 9, the first light-transmitting opening 12 and the second exhaust hole 10 on the isolation structure 8; the pixel defining material layer 16 is patterned to simultaneously form the pixel opening 72, the second light-transmitting opening 73 and the first exhaust hole 71 on the pixel defining layer 7.

[0101] The pixel defining layer 7 and the isolation structure 8 in the present application can be formed by both of the above-mentioned two embodiments. By forming the first exhaust hole 71 and the second light-transmitting opening 73 on the pixel defining layer 7, and by forming the second exhaust hole 10 and the first light-transmitting opening 12 on the isolation structure 8, not only can the water vapor in the organic insulating layer 2 be discharged in time to improve the display effect of the display panel, but also the transmittance of the display panel finally formed can be improved.

[0102] In some possible implementations, the present application further provides an electronic device, comprising the display panel of the present application, or comprising a display panel produced by the method for producing a display panel of the present application. The electronic device may include a device with image processing capabilities, such as a server, a personal computer, a laptop computer, a mobile phone, a tablet computer, a wearable device, an in-vehicle display device, etc. Because the electronic device includes the display panel of the present application, the display effect of the electronic device is improved.

[0103] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0104] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A display panel, characterized in that: The display panel includes a first display area and a second display area surrounding at least a portion of the first display area, and the display panel includes: substrate; an organic insulating layer, located on one side of the substrate; a pixel defining layer, located on a side of the organic insulating layer away from the substrate, the pixel defining layer defining a plurality of pixel openings and a plurality of first exhaust holes, the plurality of first exhaust holes being located in the second display area, the first exhaust holes partially exposing the organic insulating layer; 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 and a plurality of second exhaust through-holes, the plurality of isolation openings being located in the first display area and the second display area, the plurality of second exhaust through-holes being located in the second display area, the isolation openings being in communication with the corresponding pixel openings, and the second exhaust through-holes being in communication with the corresponding first exhaust through-holes; A light-emitting unit, at least a portion of which is located in the isolation opening.

2. The display panel according to claim 1, wherein: An orthographic projection of the first exhaust through-hole on the substrate is located within an orthographic projection of the second exhaust through-hole on the substrate.

3. The display panel according to claim 1, wherein: The light emitting unit includes a first electrode, the pixel opening exposes a portion of the first electrode, and an orthographic projection of the first electrode on the substrate is spaced apart from an orthographic projection of the first exhaust hole on the substrate.

4. The display panel according to claim 1, wherein: An orthographic projection of the second exhaust through hole on the substrate is spaced apart from an orthographic projection of the isolation opening on the substrate.

5. The display panel according to claim 1, wherein: The orthographic projection of the first exhaust hole on the substrate is spaced apart from the orthographic projection of the pixel opening on the substrate; The pixel defining layer includes an inorganic material.

6. The display panel according to claim 1, wherein: Along a direction parallel to the substrate, a width of the second exhaust hole away from the substrate is greater than or equal to half of a width of the isolation structure between two adjacent isolation openings, and less than a width of the isolation structure between two adjacent isolation openings.

7. The display panel according to claim 1, wherein: The display panel also includes a pixel circuit located between the substrate and the organic insulating layer. In the direction away from the substrate, the organic insulating layer has a connecting through-hole that penetrates the organic insulating layer. The light-emitting unit includes a first electrode, which is electrically connected to the pixel circuit through the connecting through-hole.

8. The display panel according to any one of claims 1 to 7, wherein: The isolation structure further encloses and forms a plurality of first light-transmitting openings, and the plurality of first light-transmitting openings are located in the first display area.

9. The display panel according to claim 8, wherein: The orthographic projection of the first light-transmitting opening on the substrate is spaced apart from the orthographic projection of the isolation opening on the substrate.

10. The display panel according to claim 8, wherein The pixel defining layer further defines a plurality of second light-transmitting openings, the plurality of second light-transmitting openings are located in the first display area, the second light-transmitting openings are connected to the corresponding first light-transmitting openings, and the second light-transmitting openings partially expose the organic insulating layer.

11. The display panel according to claim 10, wherein: The orthographic projection of the second light-transmitting opening on the substrate is located within the orthographic projection of the first light-transmitting opening on the substrate; The orthographic projection of the second light-transmitting opening on the substrate is spaced apart from the orthographic projection of the pixel opening on the substrate.

12. The display panel according to any one of claims 1 to 7, wherein: The display panel further includes an encapsulation unit located on a side of the light-emitting unit away from the substrate, wherein a portion of the encapsulation unit extends from a side of the isolation structure toward the isolation opening to a side of the isolation structure away from the substrate; There are multiple packaging units, and the multiple packaging units are spaced apart on a side of the isolation structure away from the substrate; A gap is formed between the packaging unit located at a side of the isolation structure away from the substrate and the side of the isolation structure away from the substrate.

13. The display panel according to claim 12, wherein: The display panel further includes a second encapsulation layer located on a side of the encapsulation unit away from the substrate, and a third encapsulation layer located on a side of the second encapsulation layer away from the substrate; The materials of the encapsulation unit and the third encapsulation layer both include inorganic materials; The material of the second encapsulation layer includes organic material.

14. The display panel according to any one of claims 1 to 7, wherein: The isolation structure includes a first isolation portion and a second isolation portion stacked in sequence in a direction away from the substrate, wherein an orthographic projection of a side of the first isolation portion away from the substrate on the substrate is located within an orthographic projection of the second isolation portion on the substrate, and an orthographic projection of a side of the first isolation portion away from the substrate on the substrate has a smaller area than an orthographic projection of the second isolation portion on the substrate; The isolation structure includes a conductive material, the light-emitting unit includes a light-emitting functional portion and a second electrode sequentially stacked in a direction away from the substrate, and the second electrode is electrically connected to the first isolation portion.

15. The display panel according to claim 14, wherein: The isolation structure further includes a third isolation portion located on a side of the first isolation portion facing the substrate, and the second electrode is electrically connected to the third isolation portion; The material of the third isolation portion includes molybdenum or titanium; and / or the material of the first isolation portion includes aluminum, silver or copper; and / or the material of the second isolation portion includes titanium or molybdenum.

16. A method for preparing a display panel, characterized in that: The display panel includes a first display area and a second display area surrounding at least a portion of the first display area, and the method includes: providing a substrate; forming an organic insulating layer on one side of the substrate; forming a pixel defining layer on a side of the organic insulating layer away from the substrate and forming an isolation structure on a side of the pixel defining layer away from the substrate, wherein the pixel defining layer defines a plurality of pixel openings and a plurality of first exhaust through-holes, and the isolation structure encloses a plurality of isolation openings and a plurality of second exhaust through-holes, wherein the plurality of isolation openings are located in the first display area and the second display area, and the plurality of second exhaust through-holes and the plurality of first exhaust through-holes are both located in the second display area, the isolation openings are in communication with the corresponding pixel openings, the second exhaust through-holes are in communication with the corresponding first exhaust through-holes, and the first exhaust through-holes partially expose the organic insulating layer; A light emitting unit is formed, wherein at least a portion of the light emitting unit is located within the isolation opening.

17. The method for manufacturing a display panel according to claim 16, wherein: The step of forming a pixel defining layer on a side of the organic insulating layer away from the substrate and forming an isolation structure located on a side of the pixel defining layer away from the substrate comprises: forming a pixel defining material layer on a side of the organic insulating layer away from the substrate, and patterning the pixel defining material layer to form a pixel defining material layer including a first exhaust hole; forming an isolation material layer on a side of the pixel defining material layer away from the substrate; The isolation material layer and the pixel definition material layer are patterned in sequence to form an isolation structure and a pixel definition layer respectively.

18. The method for manufacturing a display panel according to claim 16, wherein: The step of forming a pixel defining layer on a side of the organic insulating layer away from the substrate and forming an isolation structure located on a side of the pixel defining layer away from the substrate comprises: forming a pixel defining material layer and an isolation material layer in sequence on a side of the organic insulating layer away from the substrate; The isolation material layer and the pixel definition material layer are patterned in sequence to form an isolation structure and a pixel definition layer respectively.

19. An electronic device, characterized in that: The electronic device comprises the display panel according to any one of claims 1 to 15, or comprises a display panel manufactured by the method for manufacturing a display panel according to any one of claims 16 to 18.

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