Flexible packaging structure, flexible packaging method and display device

Abstract

The present application provides a flexible packaging structure, a flexible packaging method and a display device, wherein the flexible packaging structure includes a display substrate; a first inorganic packaging layer, which is arranged on the display substrate; an organic packaging layer, which is arranged on the first inorganic packaging layer, and the organic packaging layer includes flaky graphene oxide, which is staggered; and a second inorganic packaging layer, which is arranged on the organic packaging layer. The present application arranges flaky graphene oxide in the organic packaging layer on the first inorganic packaging layer, and the graphene oxide has hydrophobicity. The flaky graphene oxide is staggered, so that the flaky graphene oxide forms a "maze" blocking effect on water vapor and oxygen, thereby effectively extending the invasion path of water vapor and oxygen along the second inorganic packaging layer to the display substrate, reducing the risk of flexible packaging failure, and facilitating the increase of display life.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a flexible packaging structure, a flexible packaging method and a display device. Background Art

[0002] With the development of display technology and the requirements of application scenarios, more and more flexible display devices are now available on the market. Flexible display devices have significant advantages over traditional display devices, such as reduced size, easy to carry, and wide application scenarios.

[0003] At present, the display substrate of OLED display devices generally adopts TFE (Thin Film Encapsulation, TFE for short) technology when manufacturing, to prevent organic matter from gradually aging and becoming ineffective due to contact with water vapor and oxygen in the air. However, due to the limited water barrier of the existing thin film encapsulation structure, external water vapor and oxygen may still penetrate into the interior of the display panel, causing corrosion damage, thereby causing poor display of the display panel. Summary of the invention

[0004] The present application provides a flexible packaging structure, a flexible packaging method and a display device to solve the problem that the flexible packaging structure is prone to failure.

[0005] In one aspect, the present application provides a flexible packaging structure, comprising:

[0006] Display substrate;

[0007] A first inorganic encapsulation layer is disposed on the display substrate;

[0008] An organic encapsulation layer, disposed on the first inorganic encapsulation layer, the organic encapsulation layer comprising the flake-shaped graphene oxides arranged in a staggered manner;

[0009] The second inorganic encapsulation layer is disposed on the organic encapsulation layer.

[0010] In a possible implementation of the present application, the graphene oxide is multi-layered, and the graphene oxide is staggered along a first direction and / or a second direction, and the first direction intersects with the second direction.

[0011] In a possible implementation of the present application, the graphene oxide contains less than 10 layers of nano-scale graphene, and the thickness of each layer of the graphene oxide is in the range of 10 nm-500 nm.

[0012] In a possible implementation of the present application, the graphene oxide is any one of single atomic layer graphene, graphene oxide, and nitrogen-doped graphene, and the organic encapsulation layer further includes an organic solvent, which is a solvent for the graphene oxide.

[0013] In a possible implementation of the present application, the flexible packaging structure further includes:

[0014] The retaining wall is arranged on the display substrate, and the retaining wall is arranged around the outer side of the organic encapsulation layer.

[0015] In order to better implement the flexible packaging structure of the present application, the present application also provides a flexible packaging method, including:

[0016] Providing a display substrate;

[0017] forming a first inorganic encapsulation layer on the display substrate;

[0018] Using an inkjet printing process, spraying an organic ink doped with flake graphene oxide on the first inorganic encapsulation layer to form an organic encapsulation layer, wherein the flake graphene oxide is staggered in the organic encapsulation layer;

[0019] A second inorganic encapsulation layer is formed on the organic encapsulation layer.

[0020] In a possible implementation of the present application, after the step of forming the first inorganic encapsulation layer on the display substrate, the method further includes:

[0021] Any one of single atomic layer graphene, graphene oxide and nitrogen-doped graphene is doped into an organic solvent to form the organic ink.

[0022] In a possible implementation of the present application, the graphene oxide is multi-layered, and the thickness of the graphene oxide in the sheet structure is 10 nm-500 nm.

[0023] In a possible implementation of the present application, before the step of forming the first inorganic encapsulation layer on the display substrate, the method further includes:

[0024] An organic material is used to form a retaining wall structure on the display substrate, and the retaining wall structure is formed outside the organic encapsulation layer.

[0025] On the other hand, the present application also provides a display device, comprising the flexible packaging structure.

[0026] The present application provides a flexible packaging structure, a flexible packaging method and a display device. By setting flaky graphene oxide in an organic packaging layer on a first inorganic packaging layer, the graphene oxide is hydrophobic, and the flaky graphene oxide is staggered so that the flaky graphene oxide forms a "maze" blocking effect on water vapor and oxygen, thereby effectively extending the intrusion path of water vapor and oxygen along the second inorganic packaging layer to the display substrate, reducing the risk of flexible packaging failure, and helping to increase the display life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0028] Figure 1 A schematic diagram of the structure of the flexible packaging structure provided in an embodiment of the present application.

[0029] Figure 2 A schematic diagram of the structure of graphene oxide provided in yet another embodiment of the present application.

[0030] Figure 3 A schematic structural diagram of a retaining wall provided in an embodiment of the present application.

[0031] Figure 4 A schematic diagram of the manufacturing process of the flexible packaging method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0033] In the description of the present application, it should be understood that the features of the terms "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. It should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0035] The embodiments of the present application provide a flexible packaging structure, a flexible packaging method and a display device, which are respectively described in detail below.

[0036] Please refer to Figure 1-Figure 3 An embodiment of the present application provides a flexible packaging structure, including a display substrate 10, a first inorganic packaging layer 20, an organic packaging layer 30, and a second inorganic packaging layer 40.

[0037] The display substrate 10 may include a base substrate and a plurality of insulating layers located on the base substrate.

[0038] The first inorganic encapsulation layer 20 is disposed on the display substrate 10. The second inorganic encapsulation layer 40 is disposed on the organic encapsulation layer 30. The forming materials of the first inorganic encapsulation layer 20 and the second inorganic encapsulation layer 40 may include at least one of silicon oxynitride, silicon nitride, silicon dioxide, aluminum oxide, zinc oxide and titanium dioxide, and the forming materials of the first inorganic encapsulation layer 20 and the second inorganic encapsulation layer 40 may be the same or different, and no specific limitation is made here.

[0039] The organic encapsulation layer 30 is disposed on the first inorganic encapsulation layer 20 . Specifically, the organic encapsulation layer 30 is disposed between the first inorganic encapsulation layer 20 and the second inorganic encapsulation layer 40 . The organic encapsulation layer 30 includes flaky graphene oxide 31 . The flaky graphene oxide 31 is staggered.

[0040] The flexible packaging structure of the embodiment of the present application is achieved by setting flaky graphene oxide 31 in the organic packaging layer 30 on the first inorganic packaging layer 20. The graphene oxide 31 is hydrophobic, and the flaky graphene oxide 31 is staggered so that the flaky graphene oxide 31 forms a "maze" blocking effect on water vapor and oxygen, thereby effectively extending the intrusion path of water vapor and oxygen along the second inorganic packaging layer 40 to the display substrate 10, reducing the risk of flexible packaging failure, and helping to increase the display life.

[0041] In some embodiments, Figure 2As shown, the graphene oxide 31 is a multilayer, and the graphene oxide 31 is staggered along the first direction X and / or the second direction Y, and the first direction X and the second direction Y intersect. Specifically, the first direction X and the second direction Y are perpendicular to each other. Exemplarily, the first direction X is a horizontal direction, and the second direction Y is a vertical direction, wherein the graphene oxide 31 can be arranged along the first direction X or along the second direction Y. By irregularly arranging the graphene oxide 31 in the organic encapsulation layer 30, the graphene oxide 31 can form a better barrier effect on water vapor and oxygen, and can further effectively extend the intrusion path of water vapor and oxygen along the second inorganic encapsulation layer 40 to the display substrate 10, reduce the risk of flexible encapsulation failure, and help increase the display life.

[0042] In some embodiments, the graphene oxide 31 contains less than 10 layers of nano-scale graphene, and the thickness of each layer of graphene oxide 31 ranges from 10nm to 500nm. The graphene oxide 31 is nano-scale graphene, so it does not increase the thickness of the organic encapsulation layer 30, which is conducive to the realization of thinning the display panel.

[0043] In some embodiments, the graphene oxide 31 is any one of a single atomic layer graphene, graphene oxide 31, and nitrogen-doped graphene, and the organic encapsulation layer 30 also includes an organic solvent (not shown), the organic solvent is a solvent for the graphene oxide 31, and the graphene oxide 31 is formed in the organic solvent to form an organic solution. In this embodiment, the ink for inkjet printing can also be used as an organic solvent. Exemplarily, the organic solvent may include at least one of polyimide, polyurethane (PU), and polypropylene. The organic ink doped with graphene oxide 31 is printed on the first inorganic encapsulation layer 20, and the organic solvent of the organic ink is removed by drying, so that the solute 32 of the machine ink is retained to form the organic encapsulation layer 30.

[0044] In some embodiments, Figure 3 As shown, the flexible encapsulation structure also includes a retaining wall 50. The retaining wall 50 is arranged on the display substrate 10, and the retaining wall 50 is arranged on the outside of the organic encapsulation layer 30. The retaining wall 50 is used to prevent the organic ink doped with graphene from overflowing outside the retaining wall 50, wherein the retaining wall 50 is a ring-shaped retaining wall structure. The retaining wall 50 may include an inner retaining wall structure 51 and an outer retaining wall structure 52, and the outer retaining wall structure 52 is higher than the inner retaining wall structure 51, thereby further preventing the organic ink from overflowing. In addition, the retaining wall 50 is covered by the first inorganic encapsulation layer 20, and the outer part of the first inorganic encapsulation layer 20 extends from the inner side of the display substrate 10 to the outer side along the side of the retaining wall 50 to the edge of the display substrate 10, thereby extending the encapsulation path of the side of the display substrate 10, thereby ensuring the encapsulation effect of the display panel, and preventing external water vapor, oxygen, etc. from entering the display substrate 10 from the side, affecting the service life of the display substrate 10.

[0045] In order to better implement the flexible packaging structure of this application, please refer to Figure 4 , an embodiment of the present application also provides a flexible packaging method, including the following steps S101-S104.

[0046] S101, providing a display substrate 10;

[0047] S102 , forming a first inorganic encapsulation layer 20 on the display substrate 10 .

[0048] The first inorganic encapsulation layer 20 may be formed by a chemical vapor deposition (CVD) process.

[0049] S103, spraying an organic ink doped with flake graphene oxide 31 on the first inorganic encapsulation layer 20 by inkjet printing process to form an organic encapsulation layer 30, wherein the flake graphene oxide 31 is staggered in the organic encapsulation layer 30;

[0050] S104 , forming a second inorganic encapsulation layer 40 on the organic encapsulation layer 30 .

[0051] The second inorganic encapsulation layer 40 may be formed by a chemical vapor deposition (CVD) process. The materials forming the first inorganic encapsulation layer 20 and the second inorganic encapsulation layer 40 may include at least one of silicon oxynitride, silicon nitride, silicon dioxide, aluminum oxide, zinc oxide, and titanium dioxide, and the materials forming the first inorganic encapsulation layer 20 and the second inorganic encapsulation layer 40 may be the same or different, and are not specifically limited here.

[0052] The flexible packaging method of the embodiment of the present application is achieved by doping flaky graphene oxide 31 in the organic packaging layer 30 on the first inorganic packaging layer 20. The graphene oxide 31 is hydrophobic, and the flaky graphene oxide 31 is staggered so that the flaky graphene oxide 31 forms a "maze" blocking effect on water vapor and oxygen, thereby effectively extending the intrusion path of water vapor and oxygen along the second inorganic packaging layer 40 to the display substrate 10, reducing the risk of flexible packaging failure, and helping to increase the display life.

[0053] In some embodiments, after step S102, the step of forming the first inorganic encapsulation layer 20 on the display substrate 10, the following steps S201-S202 are also included:

[0054] S201, doping any one of single atomic layer graphene, graphene oxide 31, and nitrogen-doped graphene into an organic solvent to form an organic ink. Exemplarily, the organic solvent may include at least one of polyimide, polyurethane (PU), and polypropylene.

[0055] S202 , using a drying process to remove the organic solvent of the organic ink, so that the solute 32 of the organic ink is retained to form the organic encapsulation layer 30 .

[0056] In some embodiments, the graphene oxide 31 is multilayered, and the thickness of the graphene oxide 31 in the sheet structure is 10nm-500nm. The graphene oxide 31 is nano-scale graphene, so it does not increase the thickness of the organic encapsulation layer 30, which is conducive to the realization of thinning the display panel.

[0057] In some embodiments, after step S102, forming the first inorganic encapsulation layer 20 on the display substrate 10, the method further includes:

[0058] S203 , using an organic material to form a retaining wall 50 structure on the first inorganic encapsulation layer 20 , wherein the retaining wall 50 structure is formed outside the organic encapsulation layer 30 .

[0059] The retaining wall 50 is used to prevent the organic ink doped with graphene from overflowing outside the retaining wall 50, wherein the retaining wall 50 is a ring-shaped retaining wall 50 structure. The retaining wall 50 may include an inner retaining wall 50 structure and an outer retaining wall 50 structure, wherein the outer retaining wall 50 structure is higher than the inner retaining wall 50 structure, thereby further preventing the organic ink from overflowing. In addition, the retaining wall 50 is covered by the first inorganic encapsulation layer 20, and the outer portion of the first inorganic encapsulation layer 20 extends from the inner side of the display substrate 10 to the outer side along the side of the retaining wall 50 to the edge of the display substrate 10, thereby extending the encapsulation path of the side of the display substrate 10, thereby ensuring the encapsulation effect of the display panel, and preventing external water vapor, oxygen, etc. from entering the display substrate 10 from the side, thereby affecting the service life of the display substrate 10.

[0060] In order to better implement the flexible packaging structure of the present application, the present application also provides a display device, which includes the above-mentioned flexible packaging structure. Since the display device has the above-mentioned flexible packaging structure, it has all the same beneficial effects, and this embodiment will not be repeated here. Among them, the display device can be an OLED display device, a liquid crystal display device, or a Mini LED display device, etc., which is not specifically limited here. The embodiment of the present application does not specifically limit the applicability of the display device, which can be a handheld device (smartphone, tablet computer, etc.), a wearable device (smart bracelet, wireless headset, smart watch, smart glasses, etc.), a vehicle-mounted device (navigator, auxiliary reversing system, driving recorder, car refrigerator, etc.), a virtual reality device, an augmented reality device, a terminal device (Terminal Device), etc., which are not limited here.

[0061] In the above embodiments, the description of each embodiment has its own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. In specific implementation, the above units or structures can be implemented as independent entities, or can be arbitrarily combined and implemented as the same or several entities. The specific implementation of the above units or structures can refer to the previous method embodiments, which will not be repeated here.

[0062] The above is a detailed introduction to a flexible packaging structure, a flexible packaging method and a display device provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the embodiments of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A flexible packaging structure, characterized in that: include: Display substrate; A first inorganic encapsulation layer is disposed on the display substrate; An organic encapsulation layer is disposed on the first inorganic encapsulation layer, the organic encapsulation layer comprises flaky graphene oxide, the flaky graphene oxide is staggered, the flaky graphene oxide contains less than 10 layers of nano-layer graphene, and the thickness of each layer of the flaky graphene oxide is in the range of 10nm-500nm, and the organic encapsulation layer further comprises an organic solvent, which is a solvent for the flaky graphene oxide; A second inorganic encapsulation layer is disposed on the organic encapsulation layer; A retaining wall is disposed on the display substrate, the retaining wall is disposed around the outer side of the organic encapsulation layer, the first inorganic encapsulation layer covers the retaining wall, and the outer part of the first inorganic encapsulation layer extends from the inner side of the display substrate to the outer side to the edge of the display substrate along the side of the retaining wall; The organic encapsulation layer is formed by spraying an organic ink doped with the flaky graphene oxide on the first inorganic encapsulation layer by an inkjet printing process, and the flaky graphene oxide is any one of single atomic layer graphene, graphene oxide, and nitrogen-doped graphene.

2. The flexible packaging structure according to claim 1, characterized in that: The graphene oxide is multi-layered and is staggered along a first direction and / or a second direction, and the first direction intersects with the second direction.

3. A flexible packaging method, characterized in that: include: Providing a display substrate; forming a first inorganic encapsulation layer on the display substrate; An organic ink doped with flaky graphene oxide is sprayed on the first inorganic encapsulation layer by an inkjet printing process to form an organic encapsulation layer, wherein the flaky graphene oxide is staggered in the organic encapsulation layer, the flaky graphene oxide contains less than 10 layers of nano-layer graphene, and the thickness of each layer of the flaky graphene oxide is in the range of 10 nm to 500 nm; Using an organic material to form a retaining wall on the display substrate, the retaining wall is formed on the outer side of the organic encapsulation layer, the first inorganic encapsulation layer covers the retaining wall, and the outer part of the first inorganic encapsulation layer extends from the inner side of the display substrate to the outer side to the edge of the display substrate along the side of the retaining wall; A second inorganic encapsulation layer is formed on the organic encapsulation layer, and the flaky graphene oxide is any one of single atomic layer graphene, graphene oxide, and nitrogen-doped graphene.

4. A display device, characterized in that: The flexible packaging structure comprises the flexible packaging structure as described in any one of claims 1 to 2.

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