Film layer structure for prolonging OLED packaging storage time

Abstract

The utility model provides a film layer structure for prolonging OLED packaging storage, which comprises a cover plate and a substrate, and an OLED is divided into a light-emitting area, a packaging area and a transition area. A first inorganic layer and a second inorganic layer are sequentially arranged on the top of the substrate from bottom to top, a first organic layer and a second organic layer are sequentially arranged on the top of the second inorganic layer from bottom to top, a graphene layer is arranged on the top of the second inorganic layer and located in the transition area, Frit glue is further arranged on the top of the second inorganic layer and located in the packaging area, and the first organic layer and the second organic layer are arranged in the packaging area. The Frit glue is flush with the graphene layer in height, and the top of the Frit glue is attached to the bottom of the cover plate. According to the utility model, the graphene layer with high water and oxygen resistance is prepared between the packaging area and the organic light-emitting area, so that the graphene layer and the Frit glue form two barrier layers, an external water and oxygen environment is separated from an organic layer of the OLED device, even if Frit glue packaging fails after packaging and storage for a certain period of time, water and oxygen can be blocked through the graphene layer, and the organic light-emitting effect is improved. The service life of the organic material is prolonged; and the packaging preservation time is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of OLED packaging, in particular to a film layer structure for prolonging the preservation of OLED packaging. Background Art

[0002] AMOLED display technology has the advantages of high contrast, wide color gamut, low power consumption, ultra-thin design and foldability. However, the organic light-emitting materials used are easily corroded and deteriorated by water and oxygen, which reduces the life of the materials. Therefore, packaging technology to isolate water and oxygen is particularly important.

[0003] like Figure 1 As shown, the OLED device is divided into a light-emitting area (display area), a packaging area located at the edge of the OLED, and a transition area between the light-emitting area and the packaging area. The film layer structure of the OLED device includes two inorganic film layers arranged on the substrate glass. The inorganic film layer extends from the light-emitting area to the packaging area, and the first organic film layer and the second organic film layer are sequentially formed on the inorganic film layer. Among them, the first organic film layer and the second organic film layer are located in the light-emitting area, and the second organic film layer extends from the light-emitting area to the transition area. The Frit glue used for packaging is located in the packaging area.

[0004] Frit packaging is a mature and common packaging technology, but it is limited by the sealing ratio of the saddle shape after sintering Frit glue and the welding. If the package is stored for a certain period of time, there is a risk of water and oxygen invading the product. The ability to block water and oxygen is the key to the long-term storage of the package. The inorganic layer has a low water absorption rate and is easy to block water and oxygen. The organic layer has a high water absorption rate and is easy to absorb water and seep water. Since most of the transition area has an organic layer, if the package is stored for a long time, the Frit glue seal will fail, water and oxygen will invade, and the organic layer will quickly absorb water and invade the luminous area, causing the package to fail. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a film structure for prolonging the preservation of OLED packaging, which can also block the invasion of water and oxygen when the Frit glue seal fails, thereby prolonging the preservation time of the packaging and the life of the organic material.

[0006] The utility model is achieved in this way:

[0007] The utility model provides a film structure for extending the preservation of OLED packaging, comprising a cover plate and a substrate etched with a TFT circuit, wherein the OLED is divided into a light-emitting area, a packaging area located at the edge of the OLED, and a transition area arranged between the light-emitting area and the packaging area;

[0008] A first inorganic film layer and a second inorganic film layer are sequentially arranged on the top of the substrate from bottom to top, and the first inorganic film layer and the second inorganic film layer extend from the light-emitting area to the packaging area. A first organic film layer and a second organic film layer are sequentially arranged on the top of the second inorganic film layer from bottom to top, and both the first organic film layer and the second organic film layer are located in the light-emitting area. A graphene film layer is arranged on the top of the second inorganic film layer, and the graphene film layer is located in the transition area. Frit glue is also arranged on the top of the second inorganic film layer, and the Frit glue is located in the packaging area. The heights of the Frit glue and the graphene film layer are flush, and the top of the Frit glue fits with the bottom of the cover plate.

[0009] Furthermore, the first inorganic film layer and the second inorganic film layer are made of silicon oxide.

[0010] Furthermore, the material of the first organic film layer and the second organic film layer is OC.

[0011] Furthermore, a vapor-deposited film layer is disposed on the second organic film layer.

[0012] Furthermore, the graphene film layer has a width of 2000 μm and a height of 2.5 μm to 3.5 μm.

[0013] The advantages of the utility model are as follows: the utility model prepares a graphene film layer with high water and oxygen resistance between the packaging area and the organic light-emitting area, so that the graphene film layer and the Frit glue form two barrier layers, which separate the external water and oxygen environment from the organic film layer of the OLED device. Even if the Frit glue packaging fails after the packaging is stored for a certain period of time, the graphene film layer can still block water and oxygen, thereby extending the life of the organic material and the packaging storage time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the layer structure of OLED packaging in the prior art.

[0016] Figure 2 This is a schematic diagram of the layer structure of the OLED package of the present utility model.

[0017] Description of the numbers in the figure:

[0018] 1. Cover plate; 2. Substrate; 3. First inorganic film layer; 4. Second inorganic film layer; 5. First organic film layer; 6. Second organic film layer; 7. Graphene film layer; 8. Frit glue. DETAILED DESCRIPTION

[0019] See also Figure 2The utility model provides a film structure for prolonging the preservation of OLED packaging, comprising a cover plate 1 and a substrate 2 etched with a TFT circuit, wherein the OLED is divided into a light-emitting area, a packaging area located at the edge of the OLED, and a transition area arranged between the light-emitting area and the packaging area;

[0020] The top of the substrate 2 is provided with a first inorganic film layer 3 and a second inorganic film layer 4 from bottom to top, the first inorganic film layer 3 and the second inorganic film layer 4 extend from the light-emitting area to the encapsulation area, the top of the second inorganic film layer 4 is provided with a first organic film layer 5 and a second organic film layer 6 from bottom to top, the first organic film layer 5 and the second organic film layer 6 are both located in the light-emitting area, the top of the second inorganic film layer 4 is provided with a graphene film layer 7, the graphene film layer 7 is located in the transition area, and graphene is a hexagonal honeycomb two-dimensional atomic crystal material composed of carbon atoms. Graphene can block all gas molecules as small as helium. Its blocking principle mainly comes from its two-dimensional honeycomb structure. The thickness of a single layer of graphene is about 0.35nm. When its two-dimensional honeycomb structure is stacked with film thickness, it can form a "maze-like" mesh structure with layers stacked and staggered, thereby forming a dense barrier layer on the film layer to block the penetration of water, oxygen, etc. in the environment. A Frit glue 8 is also provided on the top of the second inorganic film layer 4 . The Frit glue 8 is located in the packaging area. The height of the Frit glue 8 is flush with that of the graphene film layer 7 . The top of the Frit glue 8 is in contact with the bottom of the cover plate 1 .

[0021] Specifically, the first inorganic film layer 3 and the second inorganic film layer 4 are made of silicon oxide (SiOx). The two inorganic film layers function as insulating layers and passivation film layers.

[0022] Specifically, the material of the first organic film layer 5 and the second organic film layer 6 is OC. The first organic film layer 5 and the second organic film layer 6 function as flat film layers.

[0023] Specifically, the graphene film layer 7 has a width of 2000 μm and a height of 2.5 μm to 3.5 μm.

[0024] Specifically, a vapor-deposited film layer is disposed on the second organic film layer 6. The vapor-deposited film layer forms an OLED device of the OLED panel.

[0025] In the transition zone, the utility model prepares a graphene film layer 7 with high water and oxygen resistance on the second inorganic film layer 4 (the second organic film layer 6 that is easy to absorb water in the original transition zone is removed). After preparation, the height of the film layer is flush with the surface, which is equivalent to the graphene film layer 7 and the Frit glue 8 forming two barrier layers, which separate the external water and oxygen environment from the first organic film layer 5 and the second organic film layer 6 of the OLED. Even if the Frit glue 8 packaging fails after the packaging is stored for a certain period of time, the graphene film layer 7 can still block water and oxygen, thereby extending the life of the organic material and the packaging storage time.

[0026] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A film structure for prolonging the shelf life of an OLED package, comprising a cover plate and a substrate having a TFT circuit etched thereon, characterized in that: The OLED is divided into a light-emitting area, a packaging area located at the edge of the OLED, and a transition area arranged between the light-emitting area and the packaging area; A first inorganic film layer and a second inorganic film layer are sequentially arranged on the top of the substrate from bottom to top, and the first inorganic film layer and the second inorganic film layer extend from the light-emitting area to the packaging area. A first organic film layer and a second organic film layer are sequentially arranged on the top of the second inorganic film layer from bottom to top, and both the first organic film layer and the second organic film layer are located in the light-emitting area. A graphene film layer is arranged on the top of the second inorganic film layer, and the graphene film layer is located in the transition area. Frit glue is also arranged on the top of the second inorganic film layer, and the Frit glue is located in the packaging area. The heights of the Frit glue and the graphene film layer are flush, and the top of the Frit glue fits with the bottom of the cover plate.

2. The film structure for prolonging the shelf life of OLED packaging according to claim 1, characterized in that: The first inorganic film layer and the second inorganic film layer are made of silicon oxide.

3. The film structure for prolonging the shelf life of OLED packaging according to claim 1, characterized in that: The material of the first organic film layer and the second organic film layer is OC.

4. The film structure for prolonging the shelf life of OLED packaging according to claim 1, characterized in that: The graphene film layer has a width of 2000 μm and a height of 2.5 μm to 3.5 μm.

5. The film structure for prolonging the shelf life of OLED packaging according to claim 1, characterized in that: A vapor-deposited film layer is disposed on the second organic film layer.

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