Display module and preparation method thereof

Abstract

The application discloses a display module and a preparation method thereof. The display module comprises a driving substrate, a microfluidic functional layer and a driving circuit layer. The driving circuit layer comprises a substrate and a plurality of thin film transistors. The microfluidic functional layer is arranged on one side of the driving circuit layer and comprises an electrode layer, an insulating layer and a hydrophobic layer. The microfluidic functional layer comprises a plurality of light-emitting pixel areas and a plurality of channel pixel areas, which are arranged 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 delivery channel. The electrode layer comprises a plurality of first electrodes and a plurality of driving electrodes. Each light-emitting pixel area has one first electrode, and each channel pixel area has 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 does not have an assembly hole corresponding to the channel pixel area. The hydrophobic layer has an opening corresponding to the assembly hole. Through the above arrangement, the problem of low preparation efficiency of the related art display panel is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display module and a preparation method thereof. BACKGROUND

[0002] An organic light emitting diode (OLED) display panel has many advantages such as self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, wide temperature range of use, and flexible display and large-area full-color display, and is considered as the most potential display device.

[0003] The structure of the organic light emitting diode display panel generally comprises a substrate, an anode provided on the substrate, a cathode provided on the anode, and a light-emitting layer sandwiched between the anode and the cathode. The preparation method of the light-emitting layer usually includes vacuum thermal evaporation and solution film formation.

[0004] In the related art, the specific way of solution film formation can be further divided into ink-jet printing, nozzle 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 the display panel. SUMMARY

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

[0006] To solve the above technical problems, one technical solution adopted by the present application is to provide a display module comprising:

[0007] A driving substrate comprising a substrate and a driving circuit layer provided on one side of the substrate; the driving circuit layer comprises a plurality of thin film transistors;

[0008] A microfluidic functional layer is provided on a 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 provided on a side of the insulating layer away from the substrate; the microfluidic functional layer includes a plurality of light-emitting pixel regions and a plurality of channel pixel regions, the plurality of light-emitting pixel regions and the plurality of channel pixel regions are distributed in multiple rows, each row of light-emitting pixel regions is adjacent to at least one row of channel pixel regions, and each row of channel pixel regions forms a transport channel; the electrode layer includes a plurality of first electrodes and a plurality of driving electrodes; each light-emitting pixel region has one first electrode, and each channel pixel region has one driving electrode;

[0009] 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.

[0010] Wherein, the hydrophobic layer extends to the side wall of the assembly hole;

[0011] The first electrode and the driving electrode are provided in the same layer and between the insulating layer and the driving circuit layer; or,

[0012] The first electrode is arranged between the insulating layer and the driving circuit layer; and the driving electrode is buried in the insulating layer.

[0013] The insulating layer includes a first insulating layer and a second insulating layer stacked together, 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;

[0014] 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;

[0015] The driving electrode is disposed between the first insulating layer and the second insulating layer.

[0016] Wherein, 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.

[0017] The plurality of first electrodes and the plurality of 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.

[0018] The plurality of first electrodes and the plurality of 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.

[0019] Wherein, along the column direction, the light-emitting pixel areas and the channel pixel areas are alternately distributed.

[0020] Wherein, two rows of the light-emitting pixel areas are arranged between two adjacent rows of the channel pixel areas.

[0021] Wherein, the display module further includes a second electrode layer and an encapsulation layer;

[0022] The second electrode layer entirely covers the surface of the hydrophobic layer away from the substrate and covers the light-emitting element;

[0023] The encapsulation layer covers a surface of the second electrode layer away from the substrate.

[0024] To solve the above technical problems, another technical solution adopted in this application is to provide a method for preparing a display module, comprising:

[0025] Providing a driving substrate; wherein the driving substrate comprises a substrate and a driving circuit layer provided on one side of the substrate; the driving circuit layer comprises a plurality of thin film transistors;

[0026] A microfluidic functional layer is prepared on the 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 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 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;

[0027] 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.

[0028] 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 provided on one side of the substrate, the driving circuit layer comprising a plurality of thin film transistors; a microfluidic functional layer, provided 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 being provided on a side of the insulating layer away from the substrate; the microfluidic functional layer comprising a plurality of light-emitting pixel regions and a plurality of channel pixel regions, the plurality of light-emitting pixel regions and the plurality of channel pixel regions being distributed in multiple rows, each row of light-emitting pixel regions being adjacent to at least one row of channel pixel regions, and each row of channel pixel regions forming a transport channel; the electrode layer comprising a plurality of first electrodes and a plurality of driving electrodes, each light-emitting pixel region having a first electrode, and each channel pixel region having a driving electrode; wherein the insulating layer is provided with an assembly hole at a position corresponding to the light-emitting pixel region, so that the first electrode is partially exposed, and a light-emitting element is provided in the assembly hole, the insulating layer is not provided with an assembly hole at a position corresponding to the channel pixel region, and the hydrophobic layer has an opening corresponding to the assembly hole. Through the above-mentioned setting, 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 conducive to improving the preparation efficiency of the display module, and solves the problem of low preparation efficiency of the display panel in related technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0030] Figure 1 1 is a schematic top view of a display module according to the first embodiment of the present application;

[0031] Figure 2 1 is a schematic top view of another embodiment of the display module provided in the first embodiment of the present application;

[0032] Figure 3 yes Figure 1 A schematic cross-sectional view of a first embodiment of a display module is provided;

[0033] Figure 4 yes Figure 1 A schematic cross-sectional view of a second embodiment of a display module is provided;

[0034] Figure 5 yesFigure 1 A cross-sectional schematic view of a third embodiment of the display module provided;

[0035] Figure 6 Figure 1 A cross-sectional schematic view of a fourth embodiment of the display module provided;

[0036] Figure 7 Figure 1 A cross-sectional schematic view of a fifth embodiment of the display module provided;

[0037] Figure 8 A flowchart of a preparation method of the display module provided by the second embodiment of the present application;

[0038] Figure 9 Figure 8 A structural schematic view corresponding to step S1 of the preparation method of the display module provided;

[0039] Figure 10 Figure 8 A structural schematic view corresponding to step S2 of the first embodiment of the preparation method of the display module provided;

[0040] Figure 11 Figure 8 A structural schematic view corresponding to step S2 of the second embodiment of the preparation method of the display module provided;

[0041] Figure 12 Figure 8 A structural schematic view corresponding to step S2 of the third embodiment of the preparation method of the display module provided;

[0042] Figure 13 Figure 8 A structural schematic view corresponding to step S2 of the fourth embodiment of the preparation method of the display module provided;

[0043] Figure 14 Figure 8 A structural schematic view corresponding to step S2 of the fifth embodiment of the preparation method of the display module provided;

[0044] Figure 15 Figure 8 A structural schematic view corresponding to step S3 of the preparation method of the display module provided.

[0045] Reference signs:

[0046] ​​​​​​​​​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, assembling 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, encapsulating layer. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0048] 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 the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0049] In this document, the reference to "embodiments" means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0050] Reference Figures 1 to 7 , Figure 1 is a schematic top view of an embodiment of the display module provided by the first embodiment of the present application, Figure 2is a top view structural schematic diagram of another embodiment of the display module provided by the first embodiment of the present application, Figure 3 is Figure 1 is a cross-sectional schematic diagram of the first embodiment of the display module provided by the present application, Figure 4 is Figure 1 is a cross-sectional schematic diagram of the second embodiment of the display module provided by the present application, Figure 5 is Figure 1 is a cross-sectional schematic diagram of the third embodiment of the display module provided by the present application, Figure 6 is Figure 1 is a cross-sectional schematic diagram of the fourth embodiment of the display module provided by the present application, Figure 7 is Figure 1 is a cross-sectional schematic diagram of the fifth embodiment of the display module provided by the present application.

[0051] Referring to Figures 1 to 7 , the first embodiment of the present application provides a display module 100, which comprises a driving substrate 1 and a microfluidic functional layer 2.

[0052] The driving substrate 1 comprises a substrate 11 and a driving circuit layer 12 arranged on one side of the substrate 11, and the driving circuit layer 12 comprises a plurality of thin film transistors 121. The microfluidic functional layer 2 is arranged on the side of the driving circuit layer 12 away from the substrate 11. Specifically, the microfluidic functional layer 2 comprises an electrode layer 21, an insulating layer 22 and a hydrophobic layer 23, wherein the hydrophobic layer 23 is arranged on the side of the insulating layer 22 away from the substrate 11.

[0053] The microfluidic functional layer 2 comprises a plurality of light-emitting pixel regions 3 and a plurality of channel pixel regions 4, as shown in Figure 1 and Figure 2 The plurality of light-emitting pixel regions 3 and the plurality of channel pixel regions 4 are arranged in multiple rows, and each row of light-emitting pixel regions 3 is arranged adjacent to at least one row of channel pixel regions 4, i.e., each row of light-emitting pixel regions 3 can be arranged adjacent to only one row of channel pixel regions 4, for example, along the column direction, one side of one row of light-emitting pixel regions 3 can be arranged with one row of channel pixel regions 4, or each row of light-emitting pixel regions 3 can be arranged adjacent to multiple rows of channel pixel regions 4, for example, one row of light-emitting pixel regions 3 can be arranged adjacent to two rows of channel pixel regions 4, and the two rows of channel pixel regions 4 are arranged on opposite sides of the light-emitting pixel regions 3. Each row of channel pixel regions 4 forms a delivery channel.

[0054] The electrode layer 21 comprises a plurality of first electrodes 211 and a plurality of driving electrodes 212, each light-emitting pixel region 3 has one first electrode 211, and each channel pixel region 4 has one driving electrode 212, i.e., the plurality of light-emitting pixel regions 3 are arranged one-to-one with the plurality of first electrodes 211, and the plurality of channel pixel regions 4 are arranged one-to-one with the plurality of driving electrodes 212.

[0055] 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 the light-emitting element 24 is arranged in the assembly hole 31. The light-emitting element 24 can 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.

[0056] It can be understood that by integrating the microfluidic functional layer 2 and the driving substrate 1 in one 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, the delivery channel can be formed by each row of channel pixel areas 4, and the solution is delivered from the channel pixel area 4 to the assembly hole 31 of the light-emitting pixel area 3 adjacent thereto to form the light-emitting element 24 directly in the assembly hole 31 of the light-emitting pixel area 3. After the solution delivered into the assembly hole 31 of the light-emitting pixel area 3 is cured, the light-emitting layer of the light-emitting element 24 can be formed. The light-emitting layer can be an organic light-emitting layer. At the same time, the electrode layer 21 including a plurality of first electrodes 211 and a plurality of driving electrodes 212 is arranged in the microfluidic functional layer 2. 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. The channel pixel area 4 can be controlled by the electrical connection between the driving electrode 212 and the thin film transistor 121 of the driving circuit layer 12. 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 separate transfer substrate is needed to realize the transfer of the light-emitting element 24 to the driving substrate 1. Moreover, the microfluidic functional layer 2 is part of the display module 100, which simplifies the process flow, improves the preparation efficiency, improves the performance of the display module 100, and meets more use requirements of the display module 100, thereby improving the user experience.

[0057] In some embodiments, referring to Figures 3 to 6The hydrophobic layer 23 of the microfluidic functional layer 2 extends to the sidewall of the assembly hole 31. For example, the hydrophobic layer 23 can completely cover the sidewall of the assembly hole 31, or can partially cover the sidewall of the assembly hole 31. By arranging the hydrophobic layer 23, the transport efficiency of the solution in the transport channel, i.e., the channel pixel area 4, away from the surface of the substrate 11 can be improved during the preparation of the display module 100, so that the solution can be transported to the right position.

[0058] In some embodiments, as shown in Figure 3 and Figure 4 The first electrode 211 and the driving electrode 212 are arranged in the same layer, and both 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 arranging the first electrode 211 and the driving electrode 212 in the same layer can use the same process to prepare the first electrode 211 and the driving electrode 212, which is more convenient for preparing the electrode layer 21, is conducive to saving process flow and cost, and improves production efficiency.

[0059] Specifically, in an embodiment, as shown in Figure 3 The first electrode 211 and the driving electrode 212 are arranged in the same layer and can be electrically connected to each other. One thin film transistor 121 of the driving circuit layer 12 can be electrically connected to one first electrode 211 and one driving electrode 212 at the same time. The first electrode 211 serves as an electrode, for example, an anode, of the light emitting element 24, and the driving electrode 212 serves as the driving electrode 212 of the channel pixel area 4. Simultaneously electrically connecting the first electrode 211 and the driving electrode 212 in the same layer by one thin film transistor 121 of the driving circuit layer 12 can simultaneously control the channel pixel area 4 and the light emitting pixel area 3 by the same thin film transistor 121.

[0060] In another embodiment, as shown in Figure 4 The first electrode 211 and the driving electrode 212 are arranged in the same layer and can be arranged apart from each other, i.e., 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, so as to independently control the light emitting pixel area 3 and the channel pixel area 4 by different thin film transistors 121, respectively.

[0061] In some embodiments, as shown in Figures 5 to 7As 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 embedded in the insulating layer 22, i.e., 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, thereby avoiding mutual influence between the first electrode 211 and the driving electrode 212, facilitating independent control of the light-emitting pixel area 3 and the channel pixel area 4, and further 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 surface of the insulating layer 22 away from the substrate 11, thereby making the distance between the driving electrode 212 and the solution on the surface of the hydrophobic layer 23 away from the substrate 11 closer when the channel pixel area 4 is used to transport the solution into the assembly hole 31 of the light-emitting pixel area 3, and the driving electrode 212 has a stronger force on the solution on the surface of the hydrophobic layer 23, which facilitates the movement of the solution in the channel pixel area and improves the transport efficiency.

[0062] It can be understood that, in the preparation process of the display module 100, the channel pixel area 4 is used to transport the solution into the assembly hole 31 of the light-emitting pixel area 3 to form the light-emitting element 24. The assembly hole 31 must meet certain depth requirements to form the light-emitting element 24. The depth of the assembly hole 31 cannot be too small. Since the assembly hole 31 is formed through the insulating layer 22, the thickness of the insulating layer 22 cannot be too small. Therefore, the driving electrode 212 cannot be made closer to the hydrophobic layer 23 covering the surface of the insulating layer 22 away from the substrate 11 to increase the force of the driving electrode 212 on the solution on the surface of the hydrophobic layer 23 by simply reducing the thickness of the insulating layer 22. In the present embodiment, the driving electrode 212 is embedded in the insulating layer 22, which can effectively ensure the depth of the assembly hole 31 and the performance of the light-emitting element 24, and 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 movement of the solution in the channel pixel area and improving the transport efficiency, and further improving the preparation efficiency of the display module 100.

[0063] In a specific embodiment, as Figure 5As shown, the insulating layer 22 of the microfluidic functional layer 2 comprises a first insulating layer 221 and a second insulating layer 222 arranged in a stack, the second insulating layer 222 is arranged on the side of the first insulating layer 221 away from the substrate 11, 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 penetrates the second insulating layer 222 and the first insulating layer 221 in sequence 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. By arranging the first insulating layer 221 and the second insulating layer 222 in a stack, the first electrode 211 and the driving electrode 212 are arranged in a spaced manner, 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, thereby 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 conducive to exerting stronger force on the solution on the surface of the hydrophobic layer 23 when the solution is transported in the assembly hole 31 of the channel pixel area 4 like the light-emitting pixel area 3, and helps to improve the transportation efficiency.

[0064] In some embodiments, as shown in Figure 3 and Figure 5 The plurality of first electrodes 211 and the plurality of driving electrodes 212 are arranged one-to-one to form a plurality of electrode pairs, the first electrode 211 and the driving electrode 212 of the same electrode pair are electrically connected to each other and are controlled by the same thin film transistor 121. Specifically, the number of light-emitting pixel areas 3 is equal to the number of channel pixel areas 4, and the light-emitting pixel areas 3 and the channel pixel areas 4 are arranged in a corresponding and adjacent manner, each adjacent first electrode 211 and each adjacent driving electrode 212 form an electrode pair, specifically, each adjacent first electrode 211 and each adjacent 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 as to be 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, which is more conducive to realizing the wiring of the driving circuit layer 12 and improving the performance of the display module 100.

[0065] In other embodiments, the plurality of first electrodes 211 and the plurality of driving electrodes 212 are arranged one-to-one to form a plurality of electrode pairs, as shown in Figure 4 and Figure 6As shown, the driving electrode 212 and the first electrode 211 of the same electrode pair are insulated from each other and independently controlled by two thin film transistors 121. Specifically, the number of the light-emitting pixel areas 3 is equal to the number of the channel pixel areas 4, and the light-emitting pixel areas 3 and the channel pixel areas 4 are correspondingly and adjacently arranged. Each adjacent first electrode 211 and driving electrode 212 forms an electrode pair, and the adjacent first electrode 211 and driving electrode 212 of the same electrode pair are not electrically connected, for example, can be arranged at intervals. The first electrode 211 is electrically connected to one 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 electrode 211 and driving electrode 212 are electrically connected to different thin film transistors 121 to independently control the first electrode 211 and the driving electrode 212 by different thin film transistors 121, so as to independently control the light-emitting pixel areas 3 and the channel pixel areas 4, and the light-emitting pixel areas 3 and the channel pixel areas 4 do not affect each other, which facilitates to meet more use requirements and improves the performance of the display module 100.

[0066] In some other embodiments, the plurality of first electrodes 211 and the plurality of driving electrodes 212 of the electrode layer 21 form a plurality of electrode pairs one by one, that is, the number of the first electrodes 211 is equal to the number of the driving electrodes 212, as shown in FIG. 2B. Figure 7 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 one thin film transistor 121. That is, the adjacent first electrode 211 and driving electrode 212 of the same electrode pair are electrically connected to each other. The first electrode 211 is electrically connected to one 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. The first electrode 211 and the driving electrode 212 are connected to different two 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 respectively electrically connecting them to different thin film transistors 121, the first electrode 211 and the driving electrode 212 can be simultaneously controlled by two different thin film transistors 121. When one of the thin film transistors 121 is abnormal or damaged, the other thin film transistor 121 can control the first electrode 211 and the driving electrode 212 to drive the light-emitting element 24 to realize the light-emitting function. That is, one of the two thin film transistors 121 can serve as a backup thin film transistor 121, which can improve the reliability of the driving circuit layer 12, prolong the service life of the display module 100, reduce maintenance costs, and improve the display quality of the display module 100.

[0067] Specifically, in an embodiment, as shown in FIG. 2B, Figure 1As 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 manufacturing the display module 100, the solution can be delivered into the assembly holes 31 of the corresponding light-emitting pixel areas 3 by the channel pixel area 4 adjacent to each row of the light-emitting pixel areas 3, so as to form the light-emitting elements 24 in the assembly holes 31. Each light-emitting pixel area 3 has a corresponding channel pixel area 4 to deliver the solution into the assembly hole 31 thereof to form the light-emitting element 24. A plurality of rows of the channel pixel areas 4 can simultaneously deliver the solution into a plurality of rows of the corresponding light-emitting pixel areas 3, which is beneficial to improve the delivery efficiency and further improve the manufacturing efficiency of the display module 100.

[0068] In another embodiment, as shown in Figure 2 two rows of the light-emitting pixel areas 3 can be arranged between the two adjacent rows of the channel pixel areas 4, that is, each row of the light-emitting pixel areas 3 can be arranged adjacent to one row of the channel pixel areas 4. In the process of manufacturing the display module 100, the solution can be delivered into the assembly holes 31 of the two rows of the light-emitting pixel areas 3 adjacent to the same row of the channel pixel areas 4. Specifically, one row of the channel pixel areas 4 can first deliver the solution into the assembly holes 31 of one row of the light-emitting pixel areas 3 adjacent thereto, and then deliver the solution into the assembly holes 31 of the other row of the light-emitting pixel areas 3 adjacent thereto, that is, the solution is delivered into the assembly holes 31 of the two rows of the light-emitting pixel areas 3 adjacent to the same row of the channel pixel areas 4 at different time. It can be understood that, by arranging two rows of the light-emitting pixel areas 3 between the two adjacent rows of the channel pixel areas 4, the two rows of the light-emitting pixel areas 3 located on both sides of the same row of the channel pixel areas 4 can share the same row of the channel pixel areas 4 as the delivery channel, which is beneficial to reduce the number of rows of the channel pixel areas 4, thereby improving the distribution rate of the light-emitting pixel areas 3 of the display module 100, and further improving the pixel aperture ratio of the display module 100 and the performance of the display module 100.

[0069] As shown in Figure 1 and Figure 2 In a specific embodiment, the shapes of the light-emitting pixel areas 3 and the channel pixel areas 4 are rectangular. In other embodiments, the shapes of the light-emitting pixel areas 3 and the channel pixel areas 4 can be any shape such as rectangular, rhombic, square, regular hexagonal, etc., which can be designed as required.

[0070] In some embodiments, as shown in Figure 1 and Figure 2As shown, the color of the light emitting element 24 in the assembly hole 31 of each of the three adjacent light emitting pixel areas 3 in each row is different. Specifically, the three adjacent light emitting pixel areas 3 in each row can be a first light emitting sub-pixel area 32, a second light emitting sub-pixel area 33, and a third light emitting sub-pixel area 34, respectively. The light emitting element 24 in the assembly hole 31 of the first light emitting sub-pixel area 32, the second light emitting sub-pixel area 33, and the third light emitting sub-pixel area 34 is a first light emitting sub-element 241, a second light emitting sub-element 242, and a third light emitting sub-element 243, respectively. The color of the first light emitting sub-element 241, the second light emitting sub-element 242, and the third light emitting sub-element 243 can be a first color, a second color, and a third color, respectively. The first light emitting sub-element 241, the second light emitting sub-element 242, and the third light emitting sub-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.

[0071] Specifically, in the process of using the channel pixel area 4 as a delivery channel to deliver the solution into the assembly hole 31 of the light emitting pixel area 3 corresponding thereto, the solution of the first color can be delivered first to form the light emitting layer of the first light emitting sub-element 241 of the first color in the assembly hole 31 of the first light emitting sub-pixel area 32. Then, the solution of the second color and the solution of the third color can be delivered in sequence to form the light emitting layer of the second light emitting sub-element 242 of the second color and the third light emitting sub-element 243 of the third color in the assembly hole 31 of the second light emitting sub-pixel area 33 and the third light emitting sub-pixel area 34, respectively. In a specific embodiment, after delivering the solution of each color, a cleaning liquid can be delivered into each row of channel pixel areas 4 to clean the delivery channel and clean the solution of the remaining color remaining on the surface of the channel pixel area 4, so as to avoid the problem that the remaining solution of the previous color affects the solution being delivered during the delivery of the solution of the next color, thereby affecting the display performance of the light emitting element 24.

[0072] 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 can also be provided in other colors, or the colors of the light emitting elements 24 in the assembly holes 31 of the plurality of light emitting pixel areas 3 can also be the same, which can be set as needed.

[0073] Further, in some embodiments, the display module 100 further comprises a second electrode layer 6 and an encapsulation layer 7, wherein the second electrode layer 6 covers the surface of the hydrophobic layer 23 away from the substrate 11 and covers the light-emitting element 24, and specifically, the second electrode layer 6 can 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 can 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 can encapsulate the display module 100 to prevent harmful substances such as oxygen and water vapor in the outside from entering the inside of the display module 100, which is helpful to prolong the service life of the display module 100.

[0074] It can be understood that the second electrode layer 6 covers the surface of the hydrophobic layer 23 away from the substrate 11 and the light-emitting element 24, and can form a relatively sealed environment in cooperation with the encapsulation layer 7, and the second electrode layer 6 further prevents harmful substances such as oxygen and water vapor in the outside from entering the inside of the device, avoids the organic material from being oxidized and degraded, thereby ensuring the performance and service life of the display module 100, and at the same time, the manufacturing process can be simplified and the cost can be reduced.

[0075] Referring to Figures 8 to 15 , Figure 8 is a flowchart of a method for manufacturing a display module according to a second embodiment of the present application, Figure 9 is Figure 8 a structural diagram corresponding to step S1 of the method for manufacturing a display module according to the present application, Figure 10 is Figure 8 a structural diagram corresponding to step S2 of the method for manufacturing a display module according to the first embodiment of the present application, Figure 11 is Figure 8 a structural diagram corresponding to step S2 of the method for manufacturing a display module according to the second embodiment of the present application, Figure 12 is Figure 8 a structural diagram corresponding to step S2 of the method for manufacturing a display module according to the third embodiment of the present application, Figure 13 is Figure 8 a structural diagram corresponding to step S2 of the method for manufacturing a display module according to the fourth embodiment of the present application, Figure 14 is Figure 8 a structural diagram corresponding to step S2 of the method for manufacturing a display module according to the fifth embodiment of the present application, Figure 15 is Figure 8 a structural diagram corresponding to step S3 of the method for manufacturing a display module according to an embodiment of the present application.

[0076] Referring to Figures 8 to 15The second embodiment of the present application further provides a method for preparing a display module 100, which is used to prepare any of the display modules 100 described above. Specifically, Figure 8 As shown, the method for preparing the display module 100 includes:

[0077] S1: Provide a driving substrate 1.

[0078] First, provide a driving substrate 1, specifically, as Figure 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 . The driving circuit layer 12 includes a plurality of thin film transistors 121 .

[0079] S2: preparing a microfluidic functional layer 2 on the side of the driving circuit layer 12 away from the substrate 11 .

[0080] Specifically, such as 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 .

[0081] 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 adjacent to at least one row of channel pixel areas 4, and each row of channel pixel areas 4 forms a conveying channel.

[0082] The electrode layer 21 includes a plurality of first electrodes 211 and a plurality of drive electrodes 212. Each light-emitting pixel region 3 has a first electrode 211, and each channel pixel region 4 has a drive electrode 212. The insulating layer 22 is provided with mounting holes 31 at locations corresponding to the light-emitting pixel regions 3, partially exposing the first electrodes 211. The light-emitting elements 24 are disposed within the mounting holes 31. The insulating layer 22 does not have mounting holes 31 at locations corresponding to the channel pixel regions 4. The hydrophobic layer 23 has openings 231 corresponding to the mounting holes 31.

[0083] 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 can be delivered from the channel pixel area 4 to the assembly hole 31 of the adjacent light-emitting pixel area 3 (such as Figure 15As shown in FIG. 1, the display module 100 includes a driving substrate 1 and a microfluidic functional layer 2. The driving substrate 1 includes a driving circuit layer 12 and a thin film transistor 121. The microfluidic functional layer 2 includes an assembly hole 31, a light-emitting pixel area 3, and a channel pixel area 4. The light-emitting pixel area 3 is arranged in the assembly hole 31 of the driving substrate 1. The light-emitting pixel area 3 includes a light-emitting element 24. The channel pixel area 4 is arranged in the assembly hole 31 of the driving substrate 1. The channel pixel area 4 includes a channel 41. The channel 41 is filled with a solution 5. The solution 5 is a light-emitting material solution. The solution 5 is directly formed into the light-emitting element 24 in the assembly hole 31 of the light-emitting pixel area 3. The solution 5 delivered 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 curing. The light-emitting layer can be an organic light-emitting layer. At the same time, the microfluidic functional layer 2 is provided with an electrode layer 21 including a plurality of first electrodes 211 and a plurality of driving electrodes 212. The first electrode 211 is exposed to the assembly hole 31 as an electrode of the light-emitting element 24, for example, as an anode of the light-emitting element 24. The driving electrode 212 is electrically connected with the thin film transistor 121 of the driving circuit layer 12, and the channel pixel area 4 can be controlled. Through the above arrangement, the light-emitting element 24 is transferred to the driving substrate 1 without using a separate transfer substrate, which simplifies the preparation process flow of the display module 100, is conducive to improving the preparation efficiency, improves the performance of the display module 100 prepared, and can meet more use requirements.

[0084] In some embodiments, as shown in FIG. 1, 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 by the same process, which is more convenient for preparing the electrode layer 21, is conducive to saving process flow and cost, and improves production preparation efficiency. Figure 10 Figure 11 In some embodiments, as shown in FIG. 1, 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 by the same process, which is more convenient for preparing the electrode layer 21, is conducive to saving process flow and cost, and improves production preparation efficiency.

[0085] In some embodiments, as shown in FIG. 1, 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 by the same process, which is more convenient for preparing the electrode layer 21, is conducive to saving process flow and cost, and improves production preparation efficiency. Figure 10 In another embodiment, as shown in FIG. 1, the first electrode 211 and the driving electrode 212 are arranged in the same layer and can be arranged apart from each other, that is, not electrically connected. The first electrode 211 and the driving electrode 212 can be electrically connected with different thin film transistors 121 of the driving circuit layer 12, so as to independently control the light-emitting pixel area 3 and the channel pixel area 4 through different thin film transistors 121.

[0086] Figure 11 In another embodiment, as shown in FIG. 1, the first electrode 211 and the driving electrode 212 are arranged in the same layer and can be arranged apart from each other, that is, not electrically connected. The first electrode 211 and the driving electrode 212 can be electrically connected with different thin film transistors 121 of the driving circuit layer 12, so as to independently control the light-emitting pixel area 3 and the channel pixel area 4 through different thin film transistors 121.

[0087] In some embodiments, as shown in FIG. 1, 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 by the same process, which is more convenient for preparing the electrode layer 21, is conducive to saving process flow and cost, and improves production preparation efficiency. Figures 12 to 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 embedded in the insulating layer 22, i.e., 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, the first electrode 211 and the driving electrode 212 are not connected to each other, thereby avoiding mutual influence between the first electrode 211 and the driving electrode 212, which is beneficial to independently control the light-emitting pixel area 3 and the channel pixel area 4, and further improves 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 surface of the insulating layer 22 away from the substrate 11. Therefore, when the channel pixel area 4 is used to transport the solution 5 into the assembly hole 31 of the light-emitting pixel area 3 in the subsequent process, 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, and the driving electrode 212 has a stronger force on the solution 5 on the surface of the hydrophobic layer 23, which is more convenient for driving the movement of the solution 5 in the channel pixel area, and improves the transport efficiency.

[0088] In a specific embodiment, as shown in Figure 12 The insulating layer 22 of the microfluidic functional layer 2 includes a first insulating layer 221 and a second insulating layer 222 arranged in layers. 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 penetrates the second insulating layer 222 and the first insulating layer 221 in sequence 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. By arranging the first insulating layer 221 and the second insulating layer 222 in layers, the first electrode 211 and the driving electrode 212 are arranged in layers, 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, thereby 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 closer to the hydrophobic layer 23, which is more convenient for the solution 5 on the surface of the hydrophobic layer 23 to have a stronger force in the subsequent process of transporting the solution 5 into the assembly hole 31 of the light-emitting pixel area 3 by the channel pixel area 4, which helps to improve the transport efficiency.

[0089] In some embodiments, as shown in Figure 10 and Figure 12As shown, the plurality of first electrodes 211 and the plurality of driving electrodes 212 are arranged one-to-one to form a plurality of electrode pairs, the first electrode 211 and the driving electrode 212 of the same electrode pair are electrically connected to each other and are controlled by the same thin film transistor 121. Specifically, the number of the light-emitting pixel area 3 is equal to the number of the channel pixel area 4, and the light-emitting pixel area 3 and the channel pixel area 4 are arranged correspondingly adjacent to each other, each adjacent first electrode 211 and driving electrode 212 form an electrode pair, specifically, the adjacent first electrode 211 and the 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 as to be simultaneously controlled by the same thin film transistor 121. The first electrode 211 and the driving electrode 212 are beneficial to save the number of thin film transistors 121 of the driving circuit layer 12, save costs, and can save space for the remaining wiring of the driving circuit layer 12, which is more convenient to realize the wiring of the driving circuit layer 12 and improves the performance of the display module 100 prepared and formed.

[0090] In other embodiments, the plurality of first electrodes 211 and the plurality of driving electrodes 212 are arranged one-to-one to form a plurality of electrode pairs, as shown in Figure 11 and Figure 13 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 is equal to the number of the channel pixel area 4, and the light-emitting pixel area 3 and the channel pixel area 4 are arranged correspondingly adjacent to each other, each adjacent first electrode 211 and driving electrode 212 form an electrode pair, and the adjacent first electrode 211 and the driving electrode 212 of the same electrode pair are not electrically connected, for example, can be arranged at intervals, the first electrode 211 is electrically connected to one 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 electrode 211 and the driving electrode 212 are electrically connected to different thin film transistors 121 to be independently controlled by different thin film transistors 121, respectively, so as to independently control the light-emitting pixel area 3 and the channel pixel area 4, and the light-emitting pixel area 3 and the channel pixel area 4 do not affect each other, which is convenient to meet more use requirements and improve the performance of the display module 100 prepared and formed.

[0091] In other embodiments, the plurality of first electrodes 211 and the plurality of driving electrodes 212 of the electrode layer 21 form a plurality of electrode pairs one-to-one, that is, the number of the first electrode 211 is equal to the number of the driving electrode 212, as shown in Figure 14As shown, the driving electrode 212 and the first electrode 211 of the same electrode pair are electrically connected to each other, and are electrically connected to one thin film transistor 121 respectively. That is, the adjacent first electrode 211 and the driving electrode 212 of the same electrode pair are electrically connected to each other, the first electrode 211 is electrically connected to one 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 different two 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 respectively, the first electrode 211 and the driving electrode 212 can be controlled by two different thin film transistors 121 at the same time, and 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 serve as a backup thin film transistor 121, which can improve the reliability of the driving circuit layer 12, prolong the service life of the display module 100, reduce maintenance costs, and improve the display quality of the display module 100 prepared.

[0092] S3: The solution 5 is arranged on the surface of the hydrophobic layer 23 away from the substrate 11, and is transported into the assembly hole 31 through the transport channel to form the light emitting element 24 in the assembly hole 31.

[0093] Specifically, as shown in Figure 15 , the solution 5 is arranged on the surface of the hydrophobic layer 23 away from the substrate 11, and is transported into the assembly hole 31 of the light emitting pixel area 3 through the transport channel of each row of pixel areas 4, and the solution 5 is treated by solidification and the like to form the light emitting element 24 in the assembly hole 31 (as shown in 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 solidification, which can be an organic light emitting layer.

[0094] In some embodiments, the colors of the light emitting elements 24 in the assembly holes 31 of every three adjacent light emitting pixel areas 3 in each row of light emitting pixel areas 3 are different (see Figure 1 and Figure 2), specifically, each adjacent three light-emitting pixel areas 3 can be a first sub light-emitting pixel area 32, a second sub light-emitting pixel area 33 and a 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 are a first sub light-emitting element 241, a second sub light-emitting element 242 and a 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 can be a first color, a second color and a 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 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.

[0095] Specifically, in the process of using the channel pixel area 4 as a conveying channel to convey the solution 5 into the assembly hole 31 of the light-emitting pixel area 3 corresponding thereto, the solution 5 of the first color can be conveyed 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 sequentially conveyed 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 conveying the solution 5 of each color, a cleaning liquid can be conveyed into each row of channel pixel areas 4 to clean the conveying channel and clean the solution 5 of the remaining colors remaining on the surface of the channel pixel area 4, so as to avoid the problem that the remaining solution 5 of the previous color affects the solution 5 being conveyed during the conveying of the solution 5 of the next color, thereby affecting the display performance of the light-emitting element 24.

[0096] Specifically, in some embodiments, the preparation method of the display module 100 further comprises sequentially preparing the second electrode layer 6 and the encapsulation layer 7. Specifically, referring to Figures 3 to 7 After the solution 5 is conveyed into the assembly hole 31 of the light-emitting pixel area 3 in step S3 and 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 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 in the outside from entering the inside of the prepared display module 100, and help to prolong the service life of the prepared display module 100.

[0097] Specifically, the second electrode layer 6 can 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 can 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 covers the surface of the hydrophobic layer 23 away from the substrate 11 and the light-emitting element 24, which can simplify the manufacturing process and reduce the cost. Meanwhile, the second electrode layer 6 can 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 inside of the device, avoids the oxidation and degradation of the organic material, thereby ensuring the performance and service life of the display module 100, simplifying the manufacturing process and reducing the cost.

[0098] By using the preparation method of the display module 100 provided in the second embodiment of the present application, finally any one of the display modules 100 as shown in Figures 3 to 7

[0099] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is based on the content of the specification and drawings of the present application, is 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 provided on one side of the substrate; The driving circuit layer includes a plurality of thin film transistors; A microfluidic functional layer is provided on a side of the driving circuit layer away from the substrate, serving as part of the display module; the microfluidic functional layer comprises an electrode layer, an insulating layer, and a hydrophobic layer; the hydrophobic layer is provided on a side of the insulating layer away from the substrate; the microfluidic functional layer comprises a plurality of light-emitting pixel regions and a plurality of channel pixel regions, the plurality of light-emitting pixel regions and the plurality of channel pixel regions being distributed in multiple rows, each row of light-emitting pixel regions being adjacent to at least one row of channel pixel regions, and each row of channel pixel regions forming a transport channel; the electrode layer comprises a plurality of first electrodes and a plurality of driving electrodes; each light-emitting pixel region has one first electrode, and each channel pixel region has one driving electrode; The insulating layer is provided with an assembly hole at a position corresponding to the light-emitting pixel region, so that the first electrode is partially exposed, and a light-emitting element is provided in the assembly hole; the insulating layer is not provided with an assembly hole at a position corresponding to the channel pixel region; and the hydrophobic layer has an opening corresponding to the assembly hole; The first electrode and the driving electrode of the electrode layer are both electrically connected to the thin film transistor of the driving circuit layer.

2. The display module according to claim 1, wherein: The hydrophobic layer extends to the sidewall of the assembly hole; The first electrode and the driving electrode are provided 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, wherein: The insulating layer comprises a first insulating layer and a second insulating layer which are stacked, the second insulating layer being arranged on a side of the first insulating layer away from the substrate, and the hydrophobic layer covering the second insulating layer; The first electrode is provided 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, wherein: A plurality of first electrodes and a plurality of 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, wherein: A plurality of first electrodes and a plurality of 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, wherein: A plurality of first electrodes and a plurality of 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, wherein: 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, wherein: 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, wherein: The display module further 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 encapsulation 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 provided on one side of the substrate; the driving circuit layer comprises a plurality of thin film transistors; A microfluidic functional layer is prepared on the 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 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 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; the first electrode and the driving electrode are both electrically connected to the thin film transistor of the driving circuit layer; Disposing a solution on a surface of the hydrophobic layer away from the substrate, and delivering the solution into the assembly hole through the delivery channel to form a light-emitting element in the assembly hole; The microfluidic functional layer is retained as a part of the display module.

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