Display module and preparation method thereof

Abstract

The invention discloses a display module and a preparation method thereof, and the display module comprises a driving substrate which comprises a substrate and a driving circuit layer, and the driving circuit layer comprises a plurality of thin film transistors; the microfluidic function layer is arranged on one side of the driving circuit layer and comprises an electrode layer, an insulating layer and a hydrophobic layer; the micro-fluidic functional layer comprises a plurality of light-emitting pixel areas and a plurality of channel pixel areas which are distributed in multiple rows, each row of light-emitting pixel areas is adjacent to at least one row of channel pixel areas, and each row of channel pixel areas forms a conveying channel; the electrode layer comprises a plurality of first electrodes and a plurality of driving electrodes, each light-emitting pixel area is provided with one first electrode, and each channel pixel area is provided with one driving electrode; the insulating layer is provided with an assembly hole corresponding to the light-emitting pixel area to expose the first electrode, a light-emitting element is arranged in the assembly hole, the insulating layer is not provided with an assembly hole corresponding to the channel pixel area, and the hydrophobic layer is provided with an opening corresponding to the assembly hole. Through the arrangement, the problem of low preparation efficiency of the display panel in the related technology is solved.

Description

Technical Field

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

[0002] Organic Light Emitting Display (OLED) display panels have many advantages, such as self-luminescence, low driving voltage, high luminous efficiency, short response time, high clarity and contrast, nearly 180° viewing angle, wide operating temperature range, and the ability to achieve flexible display and large-area full-color display. They are recognized by the industry as the display device with the most development potential.

[0003] The structure of an organic light-emitting diode display panel generally includes: a substrate, an anode disposed on the substrate, a cathode disposed on the anode, and a light-emitting layer sandwiched between the anode and the cathode. The light-emitting layer is usually prepared by vacuum thermal evaporation and solution process.

[0004] In the related art, the specific methods of solution film formation can be further divided into inkjet printing, continuous printing, roller printing, spin coating, etc. The above film formation methods have the problem of low film formation efficiency, resulting in low preparation efficiency of display panels. Summary of the invention

[0005] The present application mainly provides a display module and a preparation method thereof to solve the problem of low preparation efficiency of display panels in related technologies.

[0006] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide a display module, comprising: A driving substrate, comprising a substrate and a driving circuit layer arranged on one side of the substrate; the driving circuit layer comprises a plurality of thin film transistors; The microfluidic functional layer is arranged on the side of the driving circuit layer away from the substrate, and includes an electrode layer, an insulating layer and a hydrophobic layer; the hydrophobic layer is arranged on the side of the insulating layer away from the substrate; the microfluidic functional layer includes a plurality of light-emitting pixel areas and a plurality of channel pixel areas, and the plurality of light-emitting pixel areas and the plurality of channel pixel areas are distributed in multiple rows, each row of the light-emitting pixel areas is arranged adjacent to at least one row of the channel pixel areas, and each row of the channel pixel areas forms a transport channel; the electrode layer includes a plurality of first electrodes and a plurality of driving electrodes; each of the light-emitting pixel areas has one first electrode, and each of the channel pixel areas has one driving electrode; The insulating layer is provided with an assembly hole at a position corresponding to the light-emitting pixel area, so that the first electrode is partially exposed, and a light-emitting element is arranged in the assembly hole; the insulating layer is not provided with an assembly hole at a position corresponding to the channel pixel area; and the hydrophobic layer has an opening corresponding to the assembly hole.

[0007] Wherein, the hydrophobic layer extends to the side wall of the assembly hole; The first electrode and the driving electrode are arranged in the same layer and between the insulating layer and the driving circuit layer; or, The first electrode is arranged between the insulating layer and the driving circuit layer; and the driving electrode is buried in the insulating layer.

[0008] The insulating layer comprises a first insulating layer and a second insulating layer which are stacked, the second insulating layer is arranged on a side of the first insulating layer away from the substrate, and the hydrophobic layer covers the second insulating layer; The first electrode is disposed between the first insulating layer and the driving circuit layer, and the assembly hole sequentially penetrates the second insulating layer and the first insulating layer and exposes the first electrode; The driving electrode is disposed between the first insulating layer and the second insulating layer.

[0009] Among them, a plurality of the first electrodes and a plurality of the driving electrodes correspond one-to-one to form a plurality of electrode pairs; the first electrode and the driving electrode of the same electrode pair are electrically connected to each other and are controlled by the same thin film transistor.

[0010] Among them, a plurality of the first electrodes and a plurality of the driving electrodes correspond one-to-one to form a plurality of electrode pairs; the driving electrode and the first electrode of the same electrode pair are insulated from each other and are independently controlled by two thin film transistors.

[0011] Among them, a plurality of the first electrodes and a plurality of the driving electrodes correspond one to one to form a plurality of electrode pairs; the driving electrode and the first electrode of the same electrode pair are electrically connected to each other, and are respectively electrically connected to one of the thin film transistors.

[0012] Wherein, along the column direction, the light-emitting pixel regions and the channel pixel regions are alternately distributed.

[0013] Wherein, two rows of the light-emitting pixel areas are arranged between two adjacent rows of the channel pixel areas.

[0014] Wherein, the display module further includes a second electrode layer and a packaging layer; The second electrode layer entirely covers the surface of the hydrophobic layer away from the substrate and covers the light emitting element; The packaging layer covers a surface of the second electrode layer away from the substrate.

[0015] In order to solve the above technical problems, another technical solution adopted by the present application is: to provide a method for preparing a display module, comprising: Providing a driving substrate; wherein the driving substrate comprises a substrate and a driving circuit layer disposed on one side of the substrate; the driving circuit layer comprises a plurality of thin film transistors; A microfluidic functional layer is prepared on a side of the driving circuit layer away from the substrate; wherein the microfluidic functional layer includes an electrode layer, an insulating layer and a hydrophobic layer; the hydrophobic layer is arranged on a side of the insulating layer away from the substrate; the microfluidic functional layer includes a plurality of light-emitting pixel areas and a plurality of channel pixel areas, the plurality of light-emitting pixel areas and the plurality of channel pixel areas are distributed in multiple rows, each row of the light-emitting pixel areas is arranged adjacent to at least one row of the channel pixel areas, and each row of the channel pixel areas forms a transport channel; the electrode layer includes a plurality of first electrodes and a plurality of driving electrodes; each of the light-emitting pixel areas has a first electrode, and each of the channel pixel areas has a driving electrode; the insulating layer is provided with an assembly hole at a position corresponding to the light-emitting pixel area, so that the first electrode is partially exposed, and a light-emitting element is arranged in the assembly hole; the insulating layer is not provided with an assembly hole at a position corresponding to the channel pixel area; the hydrophobic layer has an opening corresponding to the assembly hole; A solution is disposed on a surface of the hydrophobic layer away from the substrate, and the solution is transported into the assembly hole through the transport channel to form a light-emitting element in the assembly hole.

[0016] The beneficial effects of the present application are as follows: Different from the prior art, the present application discloses a display module and a preparation method thereof, wherein the display module comprises: a driving substrate, comprising a substrate and a driving circuit layer arranged on one side of the substrate, the driving circuit layer comprising a plurality of thin film transistors; a microfluidic functional layer, arranged on a side of the driving circuit layer away from the substrate, comprising an electrode layer, an insulating layer and a hydrophobic layer; the hydrophobic layer is arranged on a side of the insulating layer away from the substrate; the microfluidic functional layer comprises a plurality of light-emitting pixel areas and a plurality of channel pixel areas, the plurality of light-emitting pixel areas and the plurality of channel pixel areas are all distributed in multiple rows, each row of light-emitting pixel areas is arranged adjacent to at least one row of channel pixel areas, and each row of channel pixel areas forms a transport channel; the electrode layer comprises a plurality of first electrodes and a plurality of driving electrodes, each light-emitting pixel area has a first electrode, and each channel pixel area has a driving electrode; wherein the insulating layer is provided with an assembly hole at a position corresponding to the light-emitting pixel area, so that the first electrode is partially exposed, a light-emitting element is arranged in the assembly hole, the insulating layer is not provided with an assembly hole at a position corresponding to the channel pixel area, and the hydrophobic layer has an opening corresponding to the assembly hole. Through the above-mentioned arrangement, a microfluidic functional layer is directly formed on one side of the driving substrate, and the channel pixel area of ​​the microfluidic functional layer is used as a delivery channel to directly deliver the solution to the assembly hole of the light-emitting pixel area to form a light-emitting element. There is no need to use a separate transfer substrate to transfer the light-emitting element to the driving substrate, which simplifies the preparation process of the display module, is beneficial to improving the preparation efficiency of the display module, and solves the problem of low preparation efficiency of the display panel in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which: Figure 1 is a schematic diagram of a top view of a display module according to a first embodiment of the present application; Figure 2 is a schematic diagram of a top view of another embodiment of the display module provided in the first embodiment of the present application; Figure 3 yes Figure 1 A schematic cross-sectional view of a first embodiment of a display module is provided; Figure 4 yes Figure 1 A cross-sectional schematic diagram of a second embodiment of the provided display module; Figure 5 yes Figure 1 A schematic cross-sectional view of a third embodiment of a display module is provided; Figure 6 yes Figure 1 A schematic cross-sectional view of a fourth embodiment of a display module is provided; Figure 7 yes Figure 1 A schematic cross-sectional view of a fifth embodiment of a display module is provided; Figure 8 is a schematic flow chart of a method for preparing a display module provided in a second embodiment of the present application; Fig. 9 yes Figure 8 A schematic structural diagram corresponding to step S1 of the method for preparing a display module provided; Fig.10 yes Figure 8 A structural schematic diagram corresponding to step S2 of the first embodiment of the provided method for preparing a display module; Fig.11 yes Figure 8 A structural schematic diagram corresponding to step S2 of a second embodiment of the provided method for preparing a display module; Fig.12 yes Figure 8 A schematic structural diagram corresponding to step S2 of a third embodiment of the method for preparing a display module provided; Fig.13 yes Figure 8 A structural schematic diagram corresponding to step S2 of a fourth embodiment of the method for preparing a display module provided; Fig.14 yes Figure 8 A structural schematic diagram corresponding to step S2 of a fifth embodiment of the method for preparing a display module provided; Fig.15 yes Figure 8 A structural schematic diagram corresponding to step S3 of an embodiment of a method for preparing a display module is provided.

[0018] Figure Number: 100. Display module; 1. Driving substrate; 11. Substrate; 12. Driving circuit layer; 121. Thin film transistor; 2. Microfluidic functional layer; 21. Electrode layer; 211. First electrode; 212. Driving electrode; 22. Insulating layer; 221. First insulating layer; 222. Second insulating layer; 23. Hydrophobic layer; 231. Opening; 24. Light-emitting element; 241. First sub-light-emitting element; 242. Second sub-light-emitting element; 243. Third sub-light-emitting element; 3. Light-emitting pixel area; 31. Assembly hole; 32. First sub-light-emitting pixel area; 33. Second sub-light-emitting pixel area; 34. Third sub-light-emitting pixel area; 4. Channel pixel area; 5. Solution; 6. Second electrode layer; 7. Encapsulation layer. DETAILED DESCRIPTION

[0019] 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.

[0020] The terms "first", "second", "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] See also Figures 1 to 7 , Figure 1 is a schematic diagram of a top view of a display module according to a first embodiment of the present application. Figure 2 is a schematic diagram of a top view of another embodiment of the display module provided in the first embodiment of the present application, Figure 3 yes Figure 1 A cross-sectional schematic diagram of a first embodiment of a display module is provided, Figure 4 yes Figure 1 A cross-sectional schematic diagram of a second embodiment of a display module is provided, Figure 5 yes Figure 1 A cross-sectional schematic diagram of a third embodiment of a display module is provided, Figure 6 yes Figure 1 A schematic cross-sectional view of a fourth embodiment of a display module is provided, Figure 7 yes Figure 1 A schematic cross-sectional view of a fifth embodiment of a display module is provided.

[0023] See also Figures 1 to 7 A first embodiment of the present application provides a display module 100 , and the display module 100 includes a driving substrate 1 and a microfluidic functional layer 2 .

[0024] The driving substrate 1 includes a substrate 11 and a driving circuit layer 12 disposed on one side of the substrate 11, and the driving circuit layer 12 includes a plurality of thin film transistors 121. The microfluidic functional layer 2 is disposed on the side of the driving circuit layer 12 away from the substrate 11. Specifically, the microfluidic functional layer 2 includes an electrode layer 21, an insulating layer 22 and a hydrophobic layer 23, wherein the hydrophobic layer 23 is disposed on the side of the insulating layer 22 away from the substrate 11.

[0025] The microfluidic functional layer 2 includes a plurality of light-emitting pixel regions 3 and a plurality of channel pixel regions 4. Figure 1 and Figure 2 As shown, multiple light-emitting pixel areas 3 and multiple channel pixel areas 4 are distributed in multiple rows, and each row of light-emitting pixel areas 3 is adjacent to at least one row of channel pixel areas 4, that is, each row of light-emitting pixel areas 3 can be adjacent to only one row of channel pixel areas 4, for example, along the column direction, a row of channel pixel areas 4 can be arranged on one side of a row of light-emitting pixel areas 3, or each row of light-emitting pixel areas 3 can also be adjacent to multiple rows of channel pixel areas 4, for example, one row of light-emitting pixel areas 3 can be adjacent to two rows of channel pixel areas 4, and the two rows of channel pixel areas 4 are arranged corresponding to the opposite sides of the light-emitting pixel areas 3. Among them, each row of channel pixel areas 4 forms a conveying channel.

[0026] The electrode layer 21 includes multiple first electrodes 211 and multiple driving electrodes 212, each light-emitting pixel area 3 has a first electrode 211, and each channel pixel area 4 has a driving electrode 212, that is, multiple light-emitting pixel areas 3 are arranged in a one-to-one correspondence with multiple first electrodes 211, and multiple channel pixel areas 4 are arranged in a one-to-one correspondence with multiple driving electrodes 212.

[0027] Specifically, the insulating layer 22 of the microfluidic functional layer 2 is provided with an assembly hole 31 at a position corresponding to the light-emitting pixel area 3, so that the first electrode 211 originally covered by the insulating layer 22 is partially exposed through the assembly hole 31, and a light-emitting element 24 is arranged in the assembly hole 31, wherein the light-emitting element 24 can specifically be an OLED (Organic Light Emitting Diode). The hydrophobic layer 23 has an opening 231 corresponding to the assembly hole 31, so that the light-emitting element 24 arranged in the assembly hole 31 can be exposed through the opening 231 of the hydrophobic layer 23. The insulating layer 22 is not provided with an assembly hole 31 at a position corresponding to the channel pixel area 4, that is, in the channel pixel area 4, the driving electrode 212 of the electrode layer 21 is covered by the insulating layer 22 and is not exposed.

[0028] It can be understood that by integrating the microfluidic functional layer 2 and the driving substrate 1 in a display module 100, a plurality of light-emitting pixel areas 3 and a plurality of channel pixel areas 4 are arranged in the microfluidic functional layer 2, and each row of light-emitting pixel areas 3 is arranged adjacent to at least one row of channel pixel areas 4. In the process of preparing the display module 100, a delivery channel can be formed by each row of channel pixel areas 4, and a solution can be delivered from the channel pixel area 4 to the assembly hole 31 of the light-emitting pixel area 3 adjacent thereto, so as to directly form a light-emitting element 24 in the assembly hole 31 of the light-emitting pixel area 3. Among them, the solution transported into the assembly hole 31 of the light-emitting pixel area 3 can form a light-emitting layer of the light-emitting element 24 after solidification, and the light-emitting layer can be specifically an organic light-emitting layer; at the same time, an electrode layer 21 including a plurality of first electrodes 211 and a plurality of driving electrodes 212 is provided in the microfluidic functional layer 2, and the first electrode 211 is exposed in the assembly hole 31 as an electrode of the light-emitting element 24, for example, as an anode of the light-emitting element 24, and the driving electrode 212 is electrically connected to the thin film transistor 121 of the driving circuit layer 12, so that the channel pixel area 4 can be controlled. By directly arranging the microfluidic functional layer 2 on the driving substrate 1 to form the display module 100, the structure of the display module 100 is relatively simple, the preparation process is simple, and no other separate transfer substrate is needed to realize the transfer of the light-emitting element 24 to the driving substrate 1, and the microfluidic functional layer 2 is used as a part of the display module 100, which simplifies the process flow, is conducive to improving the preparation efficiency, and improves the performance of the display module 100, and the display module 100 can meet more usage requirements and improve the user experience.

[0029] In some embodiments, see Figures 3 to 6 The hydrophobic layer 23 of the microfluidic functional layer 2 extends to the side wall of the assembly hole 31. For example, the hydrophobic layer 23 may completely cover the side wall of the assembly hole 31, or may also partially cover the side wall of the assembly hole 31. By providing the hydrophobic layer 23, during the preparation of the display module 100, it is convenient to improve the delivery efficiency of the solution in the delivery channel, i.e., the channel pixel area 4, on the surface of the microfluidic functional layer 2 away from the substrate 11, and ensure that the solution can be transported to the right place.

[0030] In some embodiments, Figure 3 and Figure 4 As shown, the first electrode 211 and the driving electrode 212 are arranged in the same layer, and the first electrode 211 and the driving electrode 212 are arranged between the insulating layer 22 and the driving circuit layer 12. It can be understood that by arranging the first electrode 211 and the driving electrode 212 in the same layer, the first electrode 211 and the driving electrode 212 can be prepared by the same process, which is more convenient for preparing the electrode layer 21, which is conducive to saving process flow and cost, and improving production efficiency.

[0031] Specifically, in one embodiment, Figure 3As shown, the first electrode 211 and the driving electrode 212 are arranged in the same layer and can be electrically connected to each other. A thin film transistor 121 of the driving circuit layer 12 can be electrically connected to a first electrode 211 and a driving electrode 212 at the same time. The first electrode 211 serves as an electrode of the light-emitting element 24, such as an anode, and the driving electrode 212 serves as the driving electrode 212 of the channel pixel area 4. A thin film transistor 121 of the driving circuit layer 12 is electrically connected to the first electrode 211 and the driving electrode 212 of the same layer at the same time, and the channel pixel area 4 and the light-emitting pixel area 3 can be controlled by the same thin film transistor 121.

[0032] In another embodiment, Figure 4 As shown, the first electrode 211 and the driving electrode 212 are arranged in the same layer and can be spaced apart from each other, that is, they are not electrically connected. The first electrode 211 and the driving electrode 212 can be electrically connected to different thin film transistors 121 of the driving circuit layer 12 to independently control the light-emitting pixel area 3 and the channel pixel area 4 through different thin film transistors 121.

[0033] In some embodiments, Figures 5 to 7 As shown, the first electrode 211 and the driving electrode 212 can also be arranged in different layers. Specifically, the first electrode 211 can be arranged between the insulating layer 22 and the driving circuit layer 12, and the driving electrode 212 can be buried in the insulating layer 22, that is, the driving electrode 212 can be located on the side of the first electrode 211 away from the driving substrate 1, so that the first electrode 211 and the driving electrode 212 are in different layers, and the first electrode 211 and the driving electrode 212 are not connected to each other, so that the mutual influence between the first electrode 211 and the driving electrode 212 can be avoided, which is conducive to independent control of the light-emitting pixel area 3 and the channel pixel Zone 4, thereby improving the performance of the display module 100; at the same time, the driving electrode 212 is arranged on the side of the first electrode 211 away from the substrate 11, so that the driving electrode 212 is closer to the hydrophobic layer 23 covering the insulating layer 22 away from the surface of the substrate 11, so that when the channel pixel area 4 is used to transport the solution to the assembly hole 31 of the light-emitting pixel area 3, the distance between the driving electrode 212 and the solution on the surface of the hydrophobic layer 23 away from the substrate 11 is closer, the driving electrode 212 has a stronger force on the solution on the surface of the hydrophobic layer 23, and it is easier to drive the solution in the channel control pixel area to move, thereby improving the transportation efficiency.

[0034] It can be understood that during the preparation process of the display module 100, the solution is transported from the channel pixel area 4 to the assembly hole 31 of the light-emitting pixel area 3 to form the light-emitting element 24. In order to form the light-emitting element 24 in the assembly hole 31, a certain depth requirement must be met. The depth of the assembly hole 31 cannot be too small. Since the assembly hole 31 is formed by penetrating the insulating layer 22, the thickness of the insulating layer 22 cannot be too small. The driving electrode 212 cannot be directly brought closer to the hydrophobic layer 23 covering the insulating layer 22 away from the surface of the substrate 11 by thinning the thickness of the insulating layer 22 to enhance the force of the driving electrode 212 on the solution on the surface of the hydrophobic layer 23. In this embodiment, by burying the driving electrode 212 in the insulating layer 22, it is possible to effectively ensure the depth of the assembly hole 31 and the performance of the light-emitting element 24, and to effectively shorten the distance between the driving electrode 212 and the solution on the surface of the hydrophobic layer 23 away from the substrate 11, so that the driving electrode 212 has a stronger force on the solution on the surface of the hydrophobic layer 23, thereby more effectively driving the solution in the channel-controlled pixel area to move, improving the transportation efficiency, and further improving the preparation efficiency of the display module 100.

[0035] In a specific embodiment, Figure 5 As shown, the insulating layer 22 of the microfluidic functional layer 2 includes a first insulating layer 221 and a second insulating layer 222 which are stacked, the second insulating layer 222 is arranged on the side of the first insulating layer 221 away from the substrate 11, and the hydrophobic layer 23 covers the second insulating layer 222. Specifically, the hydrophobic layer 23 covers the surface of the second insulating layer 222 away from the substrate 11. The first electrode 211 is arranged between the first insulating layer 221 and the driving circuit layer 12, the assembly hole 31 sequentially penetrates the second insulating layer 222 and the first insulating layer 221 and exposes the first electrode 211, and the driving electrode 212 is arranged between the first insulating layer 221 and the second insulating layer 222. The first electrode 211 and the driving electrode 212 are spaced apart by stacking the first insulating layer 221 and the second insulating layer 222. The first electrode 211 and the driving electrode 212 are prepared by different processes, which is more conducive to insulating the first electrode 211 and the driving electrode 212 from each other, thereby being more conducive to avoiding mutual influence between the first electrode 211 and the driving electrode 212. At the same time, the driving electrode 212 is located on the side of the first insulating layer 221 away from the substrate 11 and is also closer to the hydrophobic layer 23, which is more convenient for transporting the solution in the assembly hole 31 of the channel pixel area 4 to the light-emitting pixel area 3. A stronger force is exerted on the solution on the surface of the hydrophobic layer 23, which helps to improve the transport efficiency.

[0036] In some embodiments, Figure 3 and Figure 5As shown, a plurality of first electrodes 211 and a plurality of driving electrodes 212 are arranged in a one-to-one correspondence to form a plurality of electrode pairs, and the first electrode 211 and the driving electrode 212 of the same electrode pair are electrically connected to each other and controlled by the same thin film transistor 121. Specifically, the number of the light-emitting pixel areas 3 and the channel pixel areas 4 is equal, and the light-emitting pixel areas 3 and the channel pixel areas 4 are arranged correspondingly and adjacently, and each adjacent first electrode 211 and driving electrode 212 form an electrode pair, and specifically, an adjacent first electrode 211 and a driving electrode 212 are electrically connected to each other and connected to the same thin film transistor 121 of the driving circuit layer 12, so that the first electrode 211 and the driving electrode 212 are controlled by the same thin film transistor 121 at the same time, which is conducive to saving the number of thin film transistors 121 of the driving circuit layer 12, saving costs, and saving space for the remaining wiring of the driving circuit layer 12, making it easier to realize the wiring of the driving circuit layer 12, and improving the performance of the display module 100.

[0037] In other embodiments, the plurality of first electrodes 211 and the plurality of driving electrodes 212 are arranged in one-to-one correspondence to form a plurality of electrode pairs, such as Figure 4 and Figure 6 As shown, the driving electrode 212 and the first electrode 211 of the same electrode pair are insulated from each other and are independently controlled by two thin film transistors 121. Specifically, the number of the light-emitting pixel area 3 and the channel pixel area 4 is equal, and the light-emitting pixel area 3 and the channel pixel area 4 are arranged adjacent to each other, and each adjacent first electrode 211 and driving electrode 212 form an electrode pair, and the adjacent first electrodes 211 and driving electrodes 212 of the same electrode pair are not electrically connected, for example, they can be arranged at intervals, the first electrode 211 is electrically connected to a thin film transistor 121 of the driving circuit layer 12, and the driving electrode 212 is electrically connected to another thin film transistor 121 of the driving circuit layer 12. That is, the adjacent first electrodes 211 and driving electrodes 212 are electrically connected to different thin film transistors 121, so that the first electrodes 211 and the driving electrodes 212 are independently controlled by different thin film transistors 121, respectively, so that the light-emitting pixel area 3 and the channel pixel area 4 can be independently controlled, and the light-emitting pixel area 3 and the channel pixel area 4 do not affect each other, which is convenient to meet more usage requirements and improve the performance of the display module 100.

[0038] In other embodiments, the plurality of first electrodes 211 of the electrode layer 21 and the plurality of driving electrodes 212 correspond one-to-one to form a plurality of electrode pairs, that is, the number of the first electrodes 211 and the number of the driving electrodes 212 are equal, such as Figure 7As shown, the driving electrode 212 and the first electrode 211 of the same electrode pair are electrically connected to each other, and are respectively electrically connected to a thin film transistor 121. That is, the adjacent first electrodes 211 and driving electrodes 212 of the same electrode pair are electrically connected to each other, the first electrode 211 is electrically connected to a thin film transistor 121 of the driving circuit layer 12, the driving electrode 212 is electrically connected to another thin film transistor 121 of the driving circuit layer 12, and the first electrode 211 and the driving electrode 212 are connected to two different thin film transistors 121. It can be understood that by electrically connecting the first electrode 211 and the driving electrode 212 of the same electrode pair to each other, and electrically connecting them to different thin film transistors 121, the first electrode 211 and the driving electrode 212 can be controlled by two different thin film transistors 121 at the same time. When one of the thin film transistors 121 is abnormal or damaged, the first electrode 211 and the driving electrode 212 can be controlled by the other thin film transistor 121 to drive the light-emitting element 24 to realize the light-emitting function. That is, one of the two thin film transistors 121 can be used as a spare thin film transistor 121 , which can improve the reliability of the driving circuit layer 12 , extend the service life of the display module 100 , reduce maintenance costs, and improve the display quality of the display module 100 .

[0039] Specifically, in one embodiment, Figure 1 As shown, along the column direction, the light-emitting pixel areas 3 and the channel pixel areas 4 are alternately distributed, and the number of the light-emitting pixel areas 3 can be equal to the number of the channel pixel areas 4. In the process of preparing the display module 100, a row of channel pixel areas 4 adjacent to each row of light-emitting pixel areas 3 can transport the solution to the assembly hole 31 of the corresponding light-emitting pixel area 3, so as to form the light-emitting element 24 in the assembly hole 31. Each light-emitting pixel area 3 has a corresponding channel pixel area 4 that transports the solution to its assembly hole 31 to form the light-emitting element 24. Multiple rows of channel pixel areas 4 can simultaneously transport the solution to the corresponding multiple rows of light-emitting pixel areas 3, which is conducive to improving the transport efficiency, thereby improving the preparation efficiency of the display module 100.

[0040] In another embodiment, Figure 2As shown, two rows of light-emitting pixel areas 3 may be arranged between two adjacent rows of channel pixel areas 4, that is, each row of light-emitting pixel areas 3 may be arranged adjacent to a row of channel pixel areas 4. During the preparation process of the display module 100, the same row of channel pixel areas 4 may transport the solution to the assembly holes 31 of the two adjacent rows of light-emitting pixel areas 3. Specifically, a row of channel pixel areas 4 may first transport the solution to the assembly holes 31 of one of the adjacent rows of light-emitting pixel areas 3, and after transporting the solution to the assembly holes 31 of the row of light-emitting pixel areas 3, the solution may be transported to the assembly holes 31 of another adjacent row of light-emitting pixel areas 3, that is, the timing of transporting the solution to the assembly holes 31 of the two adjacent rows of light-emitting pixel areas 3 to the row of channel pixel areas 4 is different. It can be understood that by setting two rows of luminous pixel areas 3 between two adjacent rows of channel pixel areas 4, the two rows of luminous pixel areas 3 located on both sides of the same row of channel pixel areas 4 can share the row of channel pixel areas 4 as a transmission channel, which is beneficial to reducing the number of rows of channel pixel areas 4, thereby improving the distribution rate of the luminous pixel areas 3 of the display module 100, and further beneficial to improving the pixel aperture ratio of the display module 100 and improving the performance of the display module 100.

[0041] like Figure 1 and Figure 2 As shown, in a specific embodiment, the shapes of the light-emitting pixel area 3 and the channel pixel area 4 are both rectangular. In other embodiments, the shapes of the light-emitting pixel area 3 and the channel pixel area 4 can be any shape such as rectangle, rhombus, square, regular hexagon, etc., and can be designed as needed.

[0042] In some embodiments, Figure 1 and Figure 2 As shown, in each row of light-emitting pixel areas 3, the colors of the light-emitting elements 24 in the assembly holes 31 of each of the three adjacent light-emitting pixel areas 3 are different. Specifically, each of the three adjacent light-emitting pixel areas 3 can be the first sub-light-emitting pixel area 32, the second sub-light-emitting pixel area 33 and the third sub-light-emitting pixel area 34, respectively. The light-emitting elements 24 in the assembly holes 31 of the first sub-light-emitting pixel area 32, the second sub-light-emitting pixel area 33 and the third sub-light-emitting pixel area 34 are the first sub-light-emitting element 241, the second sub-light-emitting element 242 and the third sub-light-emitting element 243, respectively. The colors of the first sub-light-emitting element 241, the second sub-light-emitting element 242 and the third sub-light-emitting element 243 can be the first color, the second color and the third color, respectively. The first sub-light-emitting element 241, the second sub-light-emitting element 242 and the third sub-light-emitting element 243 can be driven and controlled to emit light of different colors. Specifically, the first color, the second color and the third color can be red, green and blue, respectively.

[0043] Specifically, in the process of using the channel pixel area 4 as a delivery channel to deliver the solution to the assembly hole 31 of the corresponding light-emitting pixel area 3, the solution of the first color can be delivered first to form the light-emitting layer of the first sub-light-emitting element 241 of the first color in the assembly hole 31 of the first sub-light-emitting pixel area 32, and then the solution of the second color and the solution of the third color are delivered in sequence to form the light-emitting layer of the second sub-light-emitting element 242 of the second color and the third sub-light-emitting element 243 of the third color in the assembly holes 31 of the second sub-light-emitting pixel area 33 and the third sub-light-emitting pixel area 34, respectively. In a specific embodiment, after delivering a solution of one color each time, a cleaning liquid can be delivered to each row of channel pixel areas 4 to clean the delivery channel and clean the remaining color solutions remaining on the surface of the channel pixel area 4, so as to avoid the problem that the residual solution of the previous color affects the solution being delivered during the delivery of the next color solution, thereby affecting the display performance of the light-emitting element 24.

[0044] In other embodiments, the light-emitting element 24 in the assembly hole 31 of the light-emitting pixel area 3 of the display module 100 may also be set to other colors, or the colors of the light-emitting elements 24 in the assembly holes 31 of multiple light-emitting pixel areas 3 may also be the same, which can be set as needed.

[0045] Further, in some embodiments, the display module 100 further includes a second electrode layer 6 and an encapsulation layer 7, wherein the second electrode layer 6 entirely covers the surface of the hydrophobic layer 23 away from the substrate 11 and covers the light emitting element 24. Specifically, the second electrode layer 6 may be a transparent conductive layer, and the second electrode layer 6 is in contact with the surface of the light emitting element 24 away from the substrate 11, wherein the second electrode layer 6 may serve as another electrode of the light emitting element 24, for example, the second electrode layer 6 serves as a cathode of the light emitting element 24. The encapsulation layer 7 covers the surface of the second electrode layer 6 away from the substrate 11, and may encapsulate the display module 100, preventing harmful substances such as oxygen and water vapor from the outside from entering the interior of the display module 100, thereby helping to extend the service life of the display module 100.

[0046] It can be understood that the second electrode layer 6 entirely covers the surface of the hydrophobic layer 23 away from the substrate 11 and the light-emitting element 24. The second electrode layer 6 can cooperate with the encapsulation layer 7 to form a relatively sealed environment. The second electrode layer 6 further prevents harmful substances such as external oxygen and water vapor from entering the device, avoiding oxidation and degradation of organic materials, thereby ensuring the performance and life of the display module 100. At the same time, it can also simplify the manufacturing process and reduce costs.

[0047] See also Figures 8 to 15 , Figure 8 is a flow chart of a method for preparing a display module provided in the second embodiment of the present application, Fig. 9 yes Figure 8 The structural schematic diagram corresponding to step S1 of the method for preparing the display module provided, Fig.10 yes Figure 8 The structural schematic diagram corresponding to step S2 of the first embodiment of the method for preparing the display module provided, Fig.11 yes Figure 8 The structural schematic diagram corresponding to the second embodiment of step S2 of the method for preparing the display module provided, Fig.12 yes Figure 8 The structural schematic diagram corresponding to step S2 of the third embodiment of the method for preparing the display module provided, Fig.13 yes Figure 8 The structural schematic diagram corresponding to step S2 of the fourth embodiment of the method for preparing the display module provided, Fig.14 yes Figure 8 The structural schematic diagram corresponding to step S2 of the fifth embodiment of the method for preparing the display module provided, Fig.15 yes Figure 8 A structural schematic diagram corresponding to step S3 of an embodiment of a method for preparing a display module is provided.

[0048] See also Figures 8 to 15 The second embodiment of the present application further provides a method for preparing a display module 100, which is used to prepare any display module 100 as described above. Specifically, Figure 8 As shown, the method for preparing the display module 100 includes: S1: providing a driving substrate 1.

[0049] First, a driving substrate 1 is provided, specifically, as Fig. 9 As shown, the driving substrate 1 includes a substrate 11 and a driving circuit layer 12 disposed on one side of the substrate 11 , and the driving circuit layer 12 includes a plurality of thin film transistors 121 .

[0050] S2: preparing a microfluidic functional layer 2 on a side of the driving circuit layer 12 away from the substrate 11 .

[0051] Specifically, Figures 10 to 14 As shown, a microfluidic functional layer 2 is prepared on a side of the driving circuit layer 12 away from the substrate 11 , wherein the microfluidic functional layer 2 includes an electrode layer 21 , an insulating layer 22 and a hydrophobic layer 23 .

[0052] Specifically, the hydrophobic layer 23 is disposed on the side of the insulating layer 22 away from the substrate 11, and the microfluidic functional layer 2 includes a plurality of light-emitting pixel regions 3 and a plurality of channel pixel regions 4 (see Figure 1 and Figure 2 ), multiple light-emitting pixel areas 3 and multiple channel pixel areas 4 are distributed in multiple rows, each row of light-emitting pixel areas 3 is arranged adjacent to at least one row of channel pixel areas 4, and each row of channel pixel areas 4 forms a conveying channel.

[0053] The electrode layer 21 includes a plurality of first electrodes 211 and a plurality of driving electrodes 212, each light-emitting pixel region 3 has a first electrode 211, each channel pixel region 4 has a driving electrode 212, the insulating layer 22 is provided with an assembly hole 31 at a position corresponding to the light-emitting pixel region 3, so that the first electrode 211 is partially exposed, and the light-emitting element 24 is arranged in the assembly hole 31. The insulating layer 22 is not provided with an assembly hole 31 at a position corresponding to the channel pixel region 4, and the hydrophobic layer 23 has an opening 231 corresponding to the assembly hole 31.

[0054] It can be understood that by directly preparing the microfluidic functional layer 2 on the side of the driving circuit layer 12 of the driving substrate 1 away from the substrate 11, a plurality of light-emitting pixel areas 3 and a plurality of channel pixel areas 4 are arranged in the microfluidic functional layer 2, and each row of light-emitting pixel areas 3 is arranged adjacent to at least one row of channel pixel areas 4, a delivery channel can be formed by each row of channel pixel areas 4, so that in the subsequent process, the solution 5 (such as the channel pixel area 4) is transported from the channel pixel area 4 to the assembly hole 31 of the light-emitting pixel area 3 adjacent to it. Fig.15 As shown), the light-emitting element 24 is directly formed in the assembly hole 31 of the light-emitting pixel area 3, wherein the solution 5 transported into the assembly hole 31 of the light-emitting pixel area 3 can form a light-emitting layer of the light-emitting element 24 after solidification, and the light-emitting layer can specifically be an organic light-emitting layer. At the same time, an electrode layer 21 including a plurality of first electrodes 211 and a plurality of driving electrodes 212 is provided in the microfluidic functional layer 2, and the first electrode 211 is exposed in the assembly hole 31 as an electrode of the light-emitting element 24, for example, as an anode of the light-emitting element 24, and the driving electrode 212 is electrically connected to the thin film transistor 121 of the driving circuit layer 12, so that the channel pixel area 4 can be controlled. Through the above-mentioned arrangement, it is not necessary to use another separate transfer substrate to realize the transfer of the light-emitting element 24 to the driving substrate 1, which simplifies the preparation process of the display module 100, is conducive to improving the preparation efficiency, and improves the performance of the prepared display module 100, which can meet more usage requirements.

[0055] In some embodiments, Fig.10 and Fig.11 As shown, the first electrode 211 and the driving electrode 212 are arranged in the same layer, and the first electrode 211 and the driving electrode 212 are arranged between the insulating layer 22 and the driving circuit layer 12. It can be understood that the first electrode 211 and the driving electrode 212 are arranged in the same layer, that is, the first electrode 211 and the driving electrode 212 are deposited and formed by the same process, which is more convenient for preparing the electrode layer 21, which is conducive to saving process flow and cost, and improving production efficiency.

[0056] Specifically, in one embodiment, Fig.10As shown, the first electrode 211 and the driving electrode 212 are arranged in the same layer and can be electrically connected to each other. A thin film transistor 121 of the driving circuit layer 12 can be electrically connected to a first electrode 211 and a driving electrode 212 at the same time. The first electrode 211 serves as an electrode of the light-emitting element 24, such as an anode, and the driving electrode 212 serves as the driving electrode 212 of the channel pixel area 4. A thin film transistor 121 of the driving circuit layer 12 is electrically connected to the first electrode 211 and the driving electrode 212 of the same layer at the same time, and the channel pixel area 4 and the light-emitting pixel area 3 can be controlled by the same thin film transistor 121.

[0057] In another embodiment, Fig.11 As shown, the first electrode 211 and the driving electrode 212 are arranged in the same layer and can be spaced apart from each other, that is, they are not electrically connected. The first electrode 211 and the driving electrode 212 can be electrically connected to different thin film transistors 121 of the driving circuit layer 12 to independently control the light-emitting pixel area 3 and the channel pixel area 4 through different thin film transistors 121.

[0058] In some embodiments, Figure 12 to Figure 14 As shown, the first electrode 211 and the driving electrode 212 can also be arranged in different layers. Specifically, the first electrode 211 can be arranged between the insulating layer 22 and the driving circuit layer 12, and the driving electrode 212 can be buried in the insulating layer 22, that is, the driving electrode 212 can be located on the side of the first electrode 211 away from the driving substrate 1, so that the first electrode 211 and the driving electrode 212 are in different layers, and the first electrode 211 and the driving electrode 212 are not connected to each other, so that the mutual influence between the first electrode 211 and the driving electrode 212 can be avoided, which is conducive to independently controlling the light-emitting pixel area 3 and the channel pixel area 4, and further improving the image quality of the image. The performance of the display module 100 is improved; at the same time, the driving electrode 212 is arranged on the side of the first electrode 211 away from the substrate 11, so that the driving electrode 212 is closer to the hydrophobic layer 23 covering the insulating layer 22 away from the surface of the substrate 11, so that in the subsequent process, when the channel pixel area 4 is used to transport the solution 5 to the assembly hole 31 of the light-emitting pixel area 3, the distance between the driving electrode 212 and the solution 5 on the surface of the hydrophobic layer 23 away from the substrate 11 is closer, the driving electrode 212 has a stronger force on the solution 5 on the surface of the hydrophobic layer 23, and it is easier to drive the solution 5 in the channel control pixel area to move, thereby improving the transportation efficiency.

[0059] In a specific embodiment, Fig.12As shown, the insulating layer 22 of the microfluidic functional layer 2 includes a first insulating layer 221 and a second insulating layer 222 which are stacked, the second insulating layer 222 is arranged on the side of the first insulating layer 221 away from the substrate 11, and the hydrophobic layer 23 covers the second insulating layer 222. Specifically, the hydrophobic layer 23 covers the surface of the second insulating layer 222 away from the substrate 11. The first electrode 211 is arranged between the first insulating layer 221 and the driving circuit layer 12, the assembly hole 31 sequentially penetrates the second insulating layer 222 and the first insulating layer 221 and exposes the first electrode 211, and the driving electrode 212 is arranged between the first insulating layer 221 and the second insulating layer 222. The first electrode 211 and the driving electrode 212 are spaced apart by stacking the first insulating layer 221 and the second insulating layer 222. The first electrode 211 and the driving electrode 212 are prepared by different processes, which is more conducive to insulating the first electrode 211 and the driving electrode 212 from each other, thereby being more conducive to avoiding mutual influence between the first electrode 211 and the driving electrode 212. At the same time, the driving electrode 212 is located on the side of the first insulating layer 221 away from the substrate 11 and is also closer to the hydrophobic layer 23, which is more convenient for the subsequent process when the solution 5 is transported into the assembly hole 31 of the channel pixel area 4 to the light-emitting pixel area 3. A stronger force is exerted on the solution 5 on the surface of the hydrophobic layer 23, which helps to improve the transport efficiency.

[0060] In some embodiments, Fig.10 and Fig.12 As shown, a plurality of first electrodes 211 and a plurality of driving electrodes 212 are arranged one by one to form a plurality of electrode pairs, and the first electrode 211 and the driving electrode 212 of the same electrode pair are electrically connected to each other and controlled by the same thin film transistor 121. Specifically, the number of the light-emitting pixel areas 3 and the channel pixel areas 4 is equal, and the light-emitting pixel areas 3 and the channel pixel areas 4 are arranged correspondingly and adjacently, and each adjacent first electrode 211 and driving electrode 212 form an electrode pair, and specifically, an adjacent first electrode 211 and a driving electrode 212 are electrically connected to each other and connected to the same thin film transistor 121 of the driving circuit layer 12, so that the first electrode 211 and the driving electrode 212 are controlled by the same thin film transistor 121 at the same time, which is conducive to saving the number of thin film transistors 121 of the driving circuit layer 12, saving costs, and saving space for the remaining wiring of the driving circuit layer 12, making it easier to realize the wiring of the driving circuit layer 12, and improving the performance of the prepared display module 100.

[0061] In other embodiments, the plurality of first electrodes 211 and the plurality of driving electrodes 212 are arranged in one-to-one correspondence to form a plurality of electrode pairs, such as Fig.11 and Fig.13As shown, the driving electrode 212 and the first electrode 211 of the same electrode pair are insulated from each other and are independently controlled by two thin film transistors 121. Specifically, the number of the light-emitting pixel area 3 and the channel pixel area 4 is equal, and the light-emitting pixel area 3 and the channel pixel area 4 are arranged adjacent to each other, and each adjacent first electrode 211 and driving electrode 212 form an electrode pair, and the adjacent first electrodes 211 and driving electrodes 212 of the same electrode pair are not electrically connected, for example, they can be arranged at intervals, the first electrode 211 is electrically connected to a thin film transistor 121 of the driving circuit layer 12, and the driving electrode 212 is electrically connected to another thin film transistor 121 of the driving circuit layer 12. That is, the adjacent first electrodes 211 and driving electrodes 212 are electrically connected to different thin film transistors 121, so that the first electrodes 211 and the driving electrodes 212 are independently controlled by different thin film transistors 121, respectively, so that the light-emitting pixel area 3 and the channel pixel area 4 can be independently controlled, and the light-emitting pixel area 3 and the channel pixel area 4 do not affect each other, which is convenient to meet more usage requirements and improve the performance of the prepared display module 100.

[0062] In other embodiments, the plurality of first electrodes 211 of the electrode layer 21 and the plurality of driving electrodes 212 correspond one-to-one to form a plurality of electrode pairs, that is, the number of the first electrodes 211 and the number of the driving electrodes 212 are equal, such as Fig.14 As shown, the driving electrode 212 and the first electrode 211 of the same electrode pair are electrically connected to each other, and are respectively electrically connected to a thin film transistor 121. That is, the adjacent first electrodes 211 and driving electrodes 212 of the same electrode pair are electrically connected to each other, the first electrode 211 is electrically connected to a thin film transistor 121 of the driving circuit layer 12, the driving electrode 212 is electrically connected to another thin film transistor 121 of the driving circuit layer 12, and the first electrode 211 and the driving electrode 212 are connected to two different thin film transistors 121. It can be understood that by electrically connecting the first electrode 211 and the driving electrode 212 of the same electrode pair to each other, and electrically connecting them to different thin film transistors 121, the first electrode 211 and the driving electrode 212 can be controlled by two different thin film transistors 121 at the same time. When one of the thin film transistors 121 is abnormal or damaged, the first electrode 211 and the driving electrode 212 can be controlled by the other thin film transistor 121 to drive the light-emitting element 24 to realize the light-emitting function. That is, one of the two thin film transistors 121 can be used as a spare thin film transistor 121, which can improve the reliability of the driving circuit layer 12, extend the service life of the display module 100, reduce maintenance costs, and improve the display quality of the prepared display module 100.

[0063] S3 : placing a solution 5 on the surface of the hydrophobic layer 23 away from the substrate 11 , and transporting the solution 5 to the assembly hole 31 through the transport channel to form the light-emitting element 24 in the assembly hole 31 .

[0064] Specifically, Fig.15 As shown, a solution 5 is disposed on the surface of the hydrophobic layer 23 away from the substrate 11, and the solution 5 is transported to the assembly hole 31 of the light-emitting pixel area 3 through each row of channel pixel areas 4, i.e., the transport channel, and the solution 5 is cured and other treatments are performed to form a light-emitting element 24 (such as Figures 3 to 7 Specifically, the solution 5 contains a functional layer material, and the functional layer material is used to prepare a light-emitting layer. For example, the solution 5 contains a light-emitting material, and the solution 5 forms a light-emitting layer of the light-emitting element 24 after being cured, and specifically can be an organic light-emitting layer.

[0065] In some embodiments, in each row of light-emitting pixel regions 3, the colors of the light-emitting elements 24 in the assembly holes 31 of every three adjacent light-emitting pixel regions 3 are different (see Figure 1 and Figure 2 ), specifically, each of the three adjacent light-emitting pixel areas 3 may be the first sub-light-emitting pixel area 32, the second sub-light-emitting pixel area 33 and the third sub-light-emitting pixel area 34, respectively, and the light-emitting elements 24 in the assembly holes 31 of the first sub-light-emitting pixel area 32, the second sub-light-emitting pixel area 33 and the third sub-light-emitting pixel area 34 may be the first sub-light-emitting element 241, the second sub-light-emitting element 242 and the third sub-light-emitting element 243, respectively, wherein the colors of the first sub-light-emitting element 241, the second sub-light-emitting element 242 and the third sub-light-emitting element 243 may be the first color, the second color and the third color, respectively, and the first sub-light-emitting element 241, the second sub-light-emitting element 242 and the third sub-light-emitting element 243 may be driven and controlled to emit light of different colors. Specifically, the first color, the second color and the third color may be red, green and blue, respectively.

[0066] Specifically, in the process of using the channel pixel area 4 as a delivery channel to deliver the solution 5 to the assembly hole 31 of the corresponding light-emitting pixel area 3, the solution 5 of the first color can be delivered first to form the light-emitting layer of the first sub-light-emitting element 241 of the first color in the assembly hole 31 of the first sub-light-emitting pixel area 32, and then the solution 5 of the second color and the solution 5 of the third color are delivered in sequence to form the light-emitting layers of the second sub-light-emitting element 242 of the second color and the third sub-light-emitting element 243 of the third color in the assembly holes 31 of the second sub-light-emitting pixel area 33 and the third sub-light-emitting pixel area 34, respectively. In a specific embodiment, after delivering a solution 5 of one color each time, a cleaning liquid can be delivered to each row of channel pixel areas 4 to clean the delivery channel and clean the remaining solutions 5 of the colors remaining on the surface of the channel pixel area 4, so as to avoid the problem that the residual solution 5 of the previous color affects the solution 5 being delivered during the delivery of the next solution 5, thereby affecting the display performance of the light-emitting element 24.

[0067] Specifically, in some embodiments, the method for preparing the display module 100 further includes sequentially preparing the second electrode layer 6 and the encapsulation layer 7. For details, see Figures 3 to 7 In step S3, the solution 5 is transported into the assembly hole 31 of the light-emitting pixel area 3, and after the light-emitting element 24 is formed in the assembly hole 31, the second electrode layer 6 and the encapsulation layer 7 are sequentially deposited, so that the second electrode layer 6 covers the entire surface of the hydrophobic layer 23 away from the substrate 11 and covers the light-emitting element 24, and the encapsulation layer 7 covers the surface of the second electrode layer 6 away from the substrate 11. The encapsulation layer 7 can encapsulate the display module 100, prevent harmful substances such as oxygen and water vapor from the outside from entering the interior of the prepared display module 100, and help to extend the service life of the prepared display module 100.

[0068] Specifically, the second electrode layer 6 may be a transparent conductive layer, and the second electrode layer 6 contacts the surface of the light-emitting element 24 away from the substrate 11, wherein the second electrode layer 6 may serve as another electrode of the light-emitting element 24, for example, the second electrode layer 6 serves as a cathode of the light-emitting element 24. The second electrode layer 6 entirely covers the surface of the hydrophobic layer 23 away from the substrate 11 and the light-emitting element 24, which may simplify the manufacturing process and reduce costs. At the same time, the second electrode layer 6 may cooperate with the encapsulation layer 7 to form a relatively sealed environment, and the second electrode layer 6 further prevents harmful substances such as oxygen and water vapor from entering the device, thereby preventing the organic material from being oxidized and degraded, thereby ensuring the performance and life of the display module 100, simplifying the manufacturing process and reducing costs.

[0069] By using the manufacturing method of the display module 100 provided in the second embodiment of the present application, the display module 100 can be finally manufactured as follows: Figures 3 to 7 Any display module 100 shown.

[0070] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display module, characterized in that: include: A driving substrate, comprising a substrate and a driving circuit layer arranged on one side of the substrate; The driving circuit layer includes a plurality of thin film transistors; The microfluidic functional layer is arranged on the side of the driving circuit layer away from the substrate, and includes an electrode layer, an insulating layer and a hydrophobic layer; the hydrophobic layer is arranged on the side of the insulating layer away from the substrate; the microfluidic functional layer includes a plurality of light-emitting pixel areas and a plurality of channel pixel areas, and the plurality of light-emitting pixel areas and the plurality of channel pixel areas are distributed in multiple rows, each row of the light-emitting pixel areas is arranged adjacent to at least one row of the channel pixel areas, and each row of the channel pixel areas forms a transport channel; the electrode layer includes a plurality of first electrodes and a plurality of driving electrodes; each of the light-emitting pixel areas has one first electrode, and each of the channel pixel areas has one driving electrode; The insulating layer is provided with an assembly hole at a position corresponding to the light-emitting pixel area, so that the first electrode is partially exposed, and a light-emitting element is arranged in the assembly hole; the insulating layer is not provided with an assembly hole at a position corresponding to the channel pixel area; and the hydrophobic layer has an opening corresponding to the assembly hole.

2. The display module according to claim 1, characterized in that: The hydrophobic layer extends to the side wall of the assembly hole; The first electrode and the driving electrode are arranged in the same layer and between the insulating layer and the driving circuit layer; or, The first electrode is arranged between the insulating layer and the driving circuit layer; and the driving electrode is buried in the insulating layer.

3. The display module according to claim 2, characterized in that: The insulating layer comprises a first insulating layer and a second insulating layer which are stacked, the second insulating layer is arranged on a side of the first insulating layer away from the substrate, and the hydrophobic layer covers the second insulating layer; The first electrode is disposed between the first insulating layer and the driving circuit layer, and the assembly hole sequentially penetrates the second insulating layer and the first insulating layer and exposes the first electrode; The driving electrode is disposed between the first insulating layer and the second insulating layer.

4. The display module according to claim 1, characterized in that: A plurality of the first electrodes and a plurality of the driving electrodes correspond one to one to form a plurality of electrode pairs; the first electrode and the driving electrode of the same electrode pair are electrically connected to each other and are controlled by the same thin film transistor.

5. The display module according to claim 1, characterized in that: A plurality of the first electrodes and a plurality of the driving electrodes correspond one-to-one to form a plurality of electrode pairs; the driving electrodes and the first electrodes in the same electrode pair are insulated from each other and are independently controlled by two thin film transistors.

6. The display module according to claim 1, characterized in that: A plurality of the first electrodes and a plurality of the driving electrodes correspond one to one to form a plurality of electrode pairs; the driving electrodes and the first electrodes in the same electrode pair are electrically connected to each other and are respectively electrically connected to one of the thin film transistors.

7. The display module according to claim 1, characterized in that: Along the column direction, the light-emitting pixel regions and the channel pixel regions are alternately distributed.

8. The display module according to claim 1, characterized in that: Two rows of the light-emitting pixel areas are arranged between two adjacent rows of the channel pixel areas.

9. The display module according to any one of claims 1 to 8, characterized in that: The display module also includes a second electrode layer and an encapsulation layer; The second electrode layer entirely covers the surface of the hydrophobic layer away from the substrate and covers the light emitting element; The packaging layer covers a surface of the second electrode layer away from the substrate.

10. A method for preparing a display module, characterized in that: include: Providing a driving substrate; wherein the driving substrate comprises a substrate and a driving circuit layer disposed on one side of the substrate; the driving circuit layer comprises a plurality of thin film transistors; A microfluidic functional layer is prepared on a side of the driving circuit layer away from the substrate; wherein the microfluidic functional layer includes an electrode layer, an insulating layer and a hydrophobic layer; the hydrophobic layer is arranged on a side of the insulating layer away from the substrate; the microfluidic functional layer includes a plurality of light-emitting pixel areas and a plurality of channel pixel areas, the plurality of light-emitting pixel areas and the plurality of channel pixel areas are distributed in multiple rows, each row of the light-emitting pixel areas is arranged adjacent to at least one row of the channel pixel areas, and each row of the channel pixel areas forms a transport channel; the electrode layer includes a plurality of first electrodes and a plurality of driving electrodes; each of the light-emitting pixel areas has a first electrode, and each of the channel pixel areas has a driving electrode; the insulating layer is provided with an assembly hole at a position corresponding to the light-emitting pixel area, so that the first electrode is partially exposed, and a light-emitting element is arranged in the assembly hole; the insulating layer is not provided with an assembly hole at a position corresponding to the channel pixel area; the hydrophobic layer has an opening corresponding to the assembly hole; A solution is disposed on a surface of the hydrophobic layer away from the substrate, and the solution is transported into the assembly hole through the transport channel to form a light-emitting element in the assembly hole.

Images