CN108155302B - Organic light-emitting display panel and preparation method thereof - Google Patents
Organic light-emitting display panel and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an organic light-emitting display panel and a preparation method thereof, wherein the organic light-emitting display panel comprises a substrate base plate, an organic light-emitting device and a packaging structure, wherein the organic light-emitting device is positioned on the substrate base plate; the orthographic projection of the first isolation layer on the substrate base plate covers the orthographic projection of the light-emitting device on the substrate base plate, and the boundaries do not overlap; the orthographic projection of the second isolation layer on the substrate covers the orthographic projection of the composite functional layer on the substrate, and the boundaries of the second isolation layer are not overlapped; wherein the composite functional layer is a thermally conductive layer that eliminates at least water oxygen. The composite functional layer can react with water and oxygen entering the packaging structure to decompose the water and the oxygen, so that the performance of the organic light-emitting device is prevented from being influenced.
Description
Technical Field
The invention relates to the technical field of organic light-emitting display panel packaging, in particular to an organic light-emitting display panel and a preparation method thereof.
Background
Electronic devices, especially OLED (Organic Light-Emitting Diode) devices, are particularly sensitive to moisture and oxygen in the air, and therefore, the OLED devices need to be packaged to ensure the performance and the service life of the devices. With the advent of flexible OLED display panels, a thin film encapsulation technology has been proposed in a targeted manner, which requires a strong ability of an encapsulation structure to block water and oxygen, and requires a flexible and bendable property of the encapsulation structure, so that the conventional rigid encapsulation structure cannot meet the requirement, and a new encapsulation form represented by the thin film encapsulation structure is developed.
At present, most thin film encapsulation structures are structures in which organic and inorganic materials are alternately arranged, but limited by the existing preparation process, the organic light emitting display panel with the structure still has a small amount of oxygen and moisture entering the organic light emitting display panel, which causes the problems of failure of electrodes or organic layers of organic light emitting devices.
Therefore, how to remove oxygen and water entering into the package structure is a problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an organic light-emitting display panel and a preparation method thereof, which are used for solving the problem that water and oxygen enter a thin film packaging structure in the conventional organic light-emitting display panel to influence the display performance of an organic light-emitting device.
The embodiment of the invention provides an organic light-emitting display panel, which comprises a substrate base plate, an organic light-emitting device and a packaging structure, wherein the organic light-emitting device is positioned on the substrate base plate, and the packaging structure comprises: the first isolation layer, the composite functional layer and the second isolation layer are sequentially arranged on one side, back to the substrate, of the organic light-emitting device in a stacked mode;
the orthographic projection of the first isolation layer on the substrate base plate covers the orthographic projection of the light-emitting device on the substrate base plate, and the boundaries do not overlap; the orthographic projection of the second isolation layer on the substrate covers the orthographic projection of the composite functional layer on the substrate, and the boundaries of the second isolation layer are not overlapped; wherein the content of the first and second substances,
the composite functional layer is a heat conducting layer for eliminating at least water and oxygen.
In a possible implementation manner, the organic light emitting display panel provided in an embodiment of the present invention, the composite functional layer includes: the polyimide film comprises a polyimide carbonized film and a metal layer positioned on at least one side of the polyimide carbonized film;
the surface of the polyimide carbonized film is provided with a graphite layer with preferred orientation.
In a possible implementation manner, in the organic light emitting display panel provided by the embodiment of the invention, the graphite layer is formed by carbonizing the polyimide film.
In a possible implementation manner of the organic light emitting display panel provided in the embodiment of the present invention, the first isolation layer, the composite functional layer, and the second isolation layer respectively encapsulate the organic light emitting device by way of thermal compression.
In a possible implementation manner of the organic light emitting display panel provided in the embodiment of the present invention, a material of the metal layer includes at least one of nano aluminum, nano magnesium, and nano iron.
In a possible implementation manner, in the organic light emitting display panel provided by the embodiment of the present invention, a material of the first isolation layer includes parylene;
the material of the second barrier layer comprises parylene.
Correspondingly, the embodiment of the invention also provides a preparation method of the organic light-emitting display panel, which comprises the following steps:
forming the light emitting device on the base substrate;
forming the first isolation layer on one side of the light-emitting device, which faces away from the substrate; wherein the orthographic projection of the first isolation layer on the substrate covers the orthographic projection of the light-emitting device on the substrate, and the boundaries do not overlap;
forming the composite functional layer on the first barrier layer; wherein the composite functional layer is configured to react with water and oxygen entering the composite functional layer and conduct heat generated by the organic light emitting device;
forming the second release layer on the composite functional layer; the orthographic projection of the second isolation layer on the substrate covers the orthographic projection of the composite functional layer on the substrate, and the boundaries of the second isolation layer are not overlapped.
In a possible implementation manner, the method for manufacturing an organic light emitting display panel according to an embodiment of the present invention, wherein the forming of the composite functional layer specifically includes:
forming a polyimide film;
carbonizing the polyimide film to form a polyimide carbonized film with a graphite layer with preferred orientation on the surface;
and forming the metal layer on at least one side of the polyimide carbide film.
In a possible implementation manner, the method for manufacturing an organic light emitting display panel provided by the embodiment of the present invention for forming the polyimide film specifically includes:
adding dimethyl acetamide in a preset mass ratio into a polyamic acid solution to form a mixed solution, and cooling the mixed solution at a preset temperature;
forming a polyimide film layer on the substrate by adopting the cooled mixed solution;
and carrying out heat treatment on the polyimide film layer to obtain the polyimide film.
In a possible implementation manner, the method for manufacturing an organic light emitting display panel according to an embodiment of the present invention is to carbonize the polyimide film to form a polyimide carbonized film having a graphite layer with a preferred orientation on a surface, and specifically includes:
placing the polyimide film between two oppositely arranged graphite plates;
and carrying out heat treatment on the graphite plate with the polyimide film in a protective atmosphere to obtain the polyimide carbonized film.
The invention has the following beneficial effects:
the organic light-emitting display panel comprises a substrate base plate, an organic light-emitting device and a packaging structure, wherein the organic light-emitting device is positioned on the substrate base plate, and the packaging structure comprises a first isolation layer, a composite functional layer and a second isolation layer which are sequentially stacked and arranged on one side, back to the substrate base plate, of the organic light-emitting device; the orthographic projection of the first isolation layer on the substrate base plate covers the orthographic projection of the light-emitting device on the substrate base plate, and the boundaries do not overlap; the orthographic projection of the second isolation layer on the substrate covers the orthographic projection of the composite functional layer on the substrate, and the boundaries of the second isolation layer are not overlapped; wherein the composite functional layer is a thermally conductive layer that eliminates at least water oxygen. The composite functional layer can react with water and oxygen entering the packaging structure to decompose the water and the oxygen, so that the water and the oxygen are prevented from entering the organic light-emitting device to influence an electrode and a light-emitting layer of the organic light-emitting device, and the performance of the organic light-emitting device is prevented from being influenced.
Drawings
Fig. 1 is a schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a composite functional layer in an organic light emitting display panel according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for manufacturing an organic light emitting display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiments of an organic light emitting display panel, a method for manufacturing the same, and a display device according to embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The thicknesses and shapes of the film layers in the drawings do not reflect actual proportions, and are merely intended to schematically illustrate the present invention.
An organic light emitting display panel provided in an embodiment of the present invention, as shown in fig. 1, includes a substrate 1, an organic light emitting device 2 located on the substrate 1, and an encapsulation structure, where the encapsulation structure includes: the organic light-emitting device comprises a first isolation layer 3, a composite functional layer 4 and a second isolation layer 5 which are sequentially stacked on one side of an organic light-emitting device 2, which is opposite to a substrate base plate 1;
the orthographic projection of the first isolation layer 3 on the substrate base plate 1 covers the orthographic projection of the light-emitting device 2 on the substrate base plate 1, and the boundaries do not overlap; the orthographic projection of the second isolation layer 5 on the substrate 1 covers the orthographic projection of the composite functional layer 4 on the substrate 1, and the boundaries do not overlap; wherein the content of the first and second substances,
the composite functional layer 4 is a heat conductive layer that eliminates at least water oxygen.
In the organic light emitting display panel provided by the embodiment of the invention, the organic light emitting display panel comprises a substrate base plate, an organic light emitting device and a packaging structure, wherein the organic light emitting device is positioned on the substrate base plate; the orthographic projection of the first isolation layer on the substrate base plate covers the orthographic projection of the light-emitting device on the substrate base plate, and the boundaries do not overlap; the orthographic projection of the second isolation layer on the substrate covers the orthographic projection of the composite functional layer on the substrate, and the boundaries are not overlapped; wherein the composite functional layer is a heat conducting layer for eliminating at least water and oxygen. The composite functional layer can react with water and oxygen entering the packaging structure to decompose the water and the oxygen, so that the water and the oxygen are prevented from entering the organic light-emitting device to influence an electrode and a light-emitting layer of the organic light-emitting device, and the performance of the organic light-emitting device is prevented from being influenced.
It should be noted that, in the organic light emitting display panel provided in the embodiment of the present invention, the first isolation layer is disposed to isolate the interface between the composite functional layer and the organic light emitting device, the second isolation layer is disposed to isolate the composite functional layer from contacting with the outside, so as to perform an integral sealing function, and the first isolation layer and the second isolation layer both have a function of isolating outside water and oxygen, so as to protect the organic light emitting device.
It should be noted that the organic light emitting device is an existing organic light emitting device, and generally includes: the organic light emitting diode comprises an anode arranged on a substrate, a hole injection layer arranged on the anode, a hole transport layer arranged on the hole injection layer, an organic light emitting layer arranged on the hole transport layer, an electron transport layer arranged on the light emitting layer and a cathode arranged on the electron transport layer. The above structures are all existing structures, and the functions thereof are not described herein again.
Specifically, in the above organic light emitting display panel provided by the embodiment of the present invention, as shown in fig. 2, the composite functional layer includes: a polyimide carbide film 41 and a metal layer 43 on at least one side of the polyimide carbide film 41;
the surface of the polyimide carbide film 41 has a graphite layer 42 with a preferred orientation.
In a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, in a manufacturing process of the polyimide carbide film, a graphite layer is formed on a surface of the polyimide carbide film, and the graphite layer is a graphite layer with a preferred orientation along a height of the film surface, so that the functional film layer has a good thermal conductivity, and can contribute to heat dissipation of an organic light emitting device, that is, heat dissipation performance of the organic light emitting device is improved, so as to improve a light emitting performance of the organic light emitting device. And the graphite layer and the metal layer can form a galvanic cell when oxygen and water enter, so that the oxygen and the water are decomposed, and the organic light-emitting device is prevented from being corroded by the oxygen and the water entering the packaging structure.
It should be noted that, in the above organic light emitting display panel provided in the embodiment of the present invention, the metal layer is located at least on one side of the polyimide carbonization film, that is, on the upper surface of the polyimide carbonization film, and of course, the metal layers may also be located on the upper surface and the lower surface of the polyimide carbonization film, respectively, and are selected according to specific use situations, and are not limited specifically herein.
Specifically, in the organic light emitting display panel provided by the embodiment of the present invention, the graphite layer is a graphite layer formed by carbonizing a polyimide film.
In a specific implementation manner, in the organic light emitting display panel provided in the embodiment of the present invention, the first isolation layer, the composite functional layer, and the second isolation layer respectively encapsulate the organic light emitting device by means of thermocompression bonding.
Specifically, in the organic light emitting display panel provided in the embodiment of the present invention, the first isolation layer is formed as an example, and when the first isolation layer is formed, due to the limitation of the manufacturing process or the used material, there may be a place where the first isolation layer and the organic light emitting device are not completely attached to each other, so that, in order to make the first isolation layer better encapsulate the organic light emitting device, after the first isolation layer is formed, the first isolation layer is processed in a thermal compression manner, so as to prevent water or oxygen from entering the organic light emitting device through the first isolation layer, and affecting the service life of the organic light emitting device. The above description is only given by taking the first isolation layer as an example, and after the composite functional layer is formed, and after the second isolation layer is formed, the film layer needs to be processed by thermocompression bonding, so as to perform better encapsulation on the organic light emitting device.
Specifically, in the organic light emitting display panel provided by the embodiment of the present invention, the material of the metal layer includes at least one of nano aluminum, nano magnesium, and nano iron.
In a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, the metal layer may be nano aluminum, nano magnesium, or nano iron, and may form a carbon-iron primary cell, a carbon-magnesium primary cell, or a carbon-aluminum primary cell with carbon, respectively, or may be any other metal capable of forming a primary cell with carbon, water, and oxygen, which is selected according to actual situations and is not limited specifically herein.
Specifically, in the above organic light emitting display panel provided by an embodiment of the present invention, the material of the first spacer layer includes parylene;
the material of the second barrier layer comprises parylene.
In a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, a parylene film is generally formed by vacuum vapor deposition, and the parylene film obtained by the method is uniform and dense, and may be prepared by other processes, which are not limited herein.
Based on the same inventive concept, as shown in fig. 3, an embodiment of the present invention further provides a method for manufacturing an organic light emitting display panel, including:
s301, forming a light-emitting device on the substrate;
s302, forming a first isolation layer on one side, back to the substrate, of the light-emitting device; wherein the orthographic projection of the first isolation layer on the substrate base plate covers the orthographic projection of the light-emitting device on the substrate base plate, and the boundaries are not overlapped;
s303, forming a composite functional layer on the first isolation layer; the composite functional layer is used for reacting with water and oxygen entering the composite functional layer and conducting heat generated by the organic light-emitting device;
s304, forming a second isolation layer on the composite functional layer; the orthographic projection of the second isolation layer on the substrate covers the orthographic projection of the composite functional layer on the substrate, and the boundaries are not overlapped.
It should be noted that, in the method for manufacturing the organic light emitting display panel provided in the embodiment of the present invention, the composite functional layer is separately prepared and deposited on the surface of the first isolation layer after film formation, and a film is formed on the first isolation layer, and the composite functional layer is directly placed on the first isolation layer in an aligned manner.
Specifically, in the method for manufacturing the organic light emitting display panel provided by the embodiment of the present invention, forming a composite functional layer specifically includes:
forming a polyimide film;
carbonizing the polyimide film to form a polyimide carbonized film with a graphite layer with preferred orientation on the surface;
a metal layer is formed on at least one side of the polyimide carbide film.
Preferably, in the method for manufacturing an organic light emitting display panel according to an embodiment of the present invention, the forming a polyimide film specifically includes:
adding dimethyl acetamide in a preset mass ratio into the polyamic acid solution to form a mixed solution, and cooling the mixed solution at a preset temperature;
forming a polyimide film layer on the substrate by adopting the cooled mixed solution;
and carrying out heat treatment on the polyimide film layer to obtain the polyimide film.
In a specific implementation manner, in the preparation method of the organic light emitting display panel provided by the embodiment of the present invention, the synthesis of the polyimide film may be prepared by the following method: adding N, N-dimethylacetamide (DMAc) into polyamide acid (PAA) with the mass fraction of 24% to form a mixed solution, wherein the mass ratio of the DMAc to the PAA ranges from 2.0:1 to 2.1: 1; placing the mixed solution in an explosion-proof freezer, standing at 4-6 ℃ for 40-48 h, forming a film on the substrate by adopting a flat-plate film-scraping method, then placing the film in a drying box, and drying at 45-50 ℃ for 16-20 h to obtain a polyimide film layer; keeping the temperature at 100 ℃ and 200 ℃ for 1h respectively, then keeping the temperature at 300 ℃ for 30min, and removing the polyimide film from the substrate to obtain the polyimide film.
It should be noted that the above-mentioned specific method for forming the polyimide film is only a preferred example, and any other method capable of forming the polyimide film may be adopted in the actual manufacturing process, and is not limited specifically herein.
Preferably, in the method for manufacturing an organic light emitting display panel according to an embodiment of the present invention, the carbonizing the polyimide film to form a polyimide carbonized film having a graphite layer with a preferred orientation on a surface includes:
placing a polyimide film between two oppositely arranged graphite plates;
and carrying out heat treatment on the graphite plate with the polyimide film in a protective atmosphere to obtain the polyimide carbide film.
In a specific implementation, in the method for manufacturing an organic light emitting display panel provided in an embodiment of the present invention, the carbonization treatment step of the polyimide film specifically includes: cutting the polyimide film, placing the polyimide film between smooth artificial graphite plates, then placing the polyimide film into a tube furnace, sealing the furnace chamber, vacuumizing the system by using a vacuum pump, and turning off the vacuum pump, wherein the final pressure is-0.05 to-0.08 MPa. And then injecting nitrogen with the flow rate of 8-12 mL/min, heating in stages at the initial heating rate of 2 ℃/min until the temperature reaches 200 ℃, changing the heating rate to 1.5 ℃/min, keeping the temperature at the final temperature of 400-600 ℃, keeping the temperature for 30-45 min, and then cooling to the room temperature at the rate of 3 ℃/min to obtain the polyimide carbonized film.
It should be noted that the above-mentioned specific method for forming the polyimide film is only a preferred example, and any other method may be used to carbonize the polyimide film during the actual preparation process, and is not limited specifically herein.
Preferably, in the method for manufacturing an organic light emitting display panel according to an embodiment of the present invention, the forming a metal layer on at least one side of the polyimide carbide film includes:
and forming a metal layer on at least one side of the polyimide carbide film by cyclic voltammetry.
In specific implementation, in the method for manufacturing the organic light emitting display panel provided in the embodiment of the present invention, the metal layer is illustrated as nano iron, where the specific steps of loading the nano iron on the surface of the polyimide carbide film are as follows: scanning by adopting cyclic voltammetry, taking gallium arsenide (GaAs) as a working electrode, a polyimide carbonized film as a counter electrode, and FeSO4.7H2O with the concentration of 0.1mol/L and the pH of 2.5-3.0 as an electrolyte solution at the scanning speed of 100mV/s and the scanning range of-3.5-5.5V; introducing high-purity nitrogen into the solution for deoxygenation for 20-30 min before electrodeposition, washing the solution with a large amount of deoxygenated deionized water after deposition, blow-drying the solution with the high-purity nitrogen, placing the solution in a vacuum drying box, vacuumizing the vacuum drying box until the final pressure is-0.05 to-0.08 MPa, and keeping the vacuum drying box for 24 hours to obtain the composite functional layer, wherein the thickness of the composite functional layer is 200-300 nm.
In specific implementation, in the preparation method of the organic light emitting display panel provided in the embodiment of the present invention, when the metal layer is nano aluminum or nano magnesium, a sputtering deposition method may be used to form the metal layer, and of course, any other process capable of meeting the requirements may be used, which is not specifically limited herein.
Since the principle of the method for manufacturing the organic light emitting display panel to solve the problem is similar to that of the organic light emitting display panel, the method for manufacturing the organic light emitting display panel can be implemented by the organic light emitting display panel, and repeated details are omitted.
Based on the same inventive concept, embodiments of the present invention further provide a display device, including any one of the organic light emitting display panels provided by embodiments of the present invention. Since the display device solves the problems in a similar manner to the aforementioned organic light emitting display panel, the display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. The implementation of the display device can be referred to the above embodiments of the organic light emitting display panel, and repeated descriptions are omitted.
The organic light-emitting display panel comprises a substrate base plate, an organic light-emitting device and a packaging structure, wherein the organic light-emitting device is positioned on the substrate base plate; the orthographic projection of the first isolation layer on the substrate base plate covers the orthographic projection of the light-emitting device on the substrate base plate, and the boundaries do not overlap; the orthographic projection of the second isolation layer on the substrate covers the orthographic projection of the composite functional layer on the substrate, and the boundaries are not overlapped; wherein the composite functional layer is a heat conducting layer for eliminating at least water and oxygen. The composite functional layer can react with water and oxygen entering the packaging structure to decompose the water and the oxygen, so that the water and the oxygen are prevented from entering the organic light-emitting device to influence an electrode and a light-emitting layer of the organic light-emitting device, and the performance of the organic light-emitting device is prevented from being influenced.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. An organic light emitting display panel, comprising a substrate base plate, an organic light emitting device on the substrate base plate and an encapsulation structure, wherein the encapsulation structure comprises: the first isolation layer, the composite functional layer and the second isolation layer are sequentially arranged on one side, back to the substrate, of the organic light-emitting device in a stacked mode;
the orthographic projection of the first isolation layer on the substrate base plate covers the orthographic projection of the light-emitting device on the substrate base plate, and the boundaries do not overlap; the orthographic projection of the second isolation layer on the substrate covers the orthographic projection of the composite functional layer on the substrate, and the boundaries of the second isolation layer are not overlapped; wherein the content of the first and second substances,
the composite functional layer is a heat conduction layer for decomposing at least water and oxygen;
the composite functional layer includes: the polyimide film comprises a polyimide carbonized film and a metal layer positioned on at least one side of the polyimide carbonized film;
the surface of the polyimide carbonized film is provided with a graphite layer with preferred orientation.
2. The organic light-emitting display panel according to claim 1, wherein the graphite layer is a graphite layer formed by carbonizing a polyimide film.
3. The organic light emitting display panel according to claim 1, wherein the first spacer layer, the composite functional layer, and the second spacer layer encapsulate the organic light emitting device by thermal compression bonding, respectively.
4. The organic light emitting display panel of claim 1, wherein a material of the metal layer comprises at least one of nano aluminum, nano magnesium, and nano iron.
5. The organic light emitting display panel of claim 1, wherein a material of the first spacer layer comprises parylene;
the material of the second barrier layer comprises parylene.
6. A method of manufacturing an organic light emitting display panel according to any one of claims 1 to 5, comprising:
forming the light emitting device on the base substrate;
forming the first isolation layer on one side of the light-emitting device, which faces away from the substrate; wherein the orthographic projection of the first isolation layer on the substrate covers the orthographic projection of the light-emitting device on the substrate, and the boundaries do not overlap;
forming the composite functional layer on the first barrier layer; wherein the composite functional layer is configured to react with water and oxygen entering the composite functional layer and conduct heat generated by the organic light emitting device;
forming the second release layer on the composite functional layer; the orthographic projection of the second isolation layer on the substrate covers the orthographic projection of the composite functional layer on the substrate, and the boundaries of the second isolation layer are not overlapped.
7. The method according to claim 6, wherein the forming of the composite functional layer specifically comprises:
forming a polyimide film;
carbonizing the polyimide film to form a polyimide carbonized film with a graphite layer with preferred orientation on the surface;
and forming a metal layer on at least one side of the polyimide carbide film.
8. The method of claim 7, wherein forming the polyimide film specifically comprises:
adding dimethyl acetamide in a preset mass ratio into a polyamic acid solution to form a mixed solution, and cooling the mixed solution at a preset temperature;
forming a polyimide film layer on the substrate by adopting the cooled mixed solution;
and carrying out heat treatment on the polyimide film layer to obtain the polyimide film.
9. The method according to claim 7, wherein carbonizing the polyimide film to form a polyimide carbonized film having a graphite layer with a preferred orientation on a surface thereof comprises:
placing the polyimide film between two oppositely arranged graphite plates;
and carrying out heat treatment on the graphite plate with the polyimide film in a protective atmosphere to obtain the polyimide carbonized film.
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| CN108899436B (en) * | 2018-06-29 | 2020-03-06 | 京东方科技集团股份有限公司 | Packaging structure, display panel, display device and manufacturing method thereof |
| CN110429194B (en) * | 2018-08-10 | 2022-07-08 | 广东聚华印刷显示技术有限公司 | Thin film packaging structure, device packaging method and application |
| CN109546001B (en) * | 2018-11-22 | 2021-02-26 | 京东方科技集团股份有限公司 | Display panel, preparation method thereof and display device |
| CN109585678A (en) * | 2018-11-30 | 2019-04-05 | 云谷（固安）科技有限公司 | Encapsulating structure, the display device including encapsulating structure and encapsulating structure preparation method |
| CN109616584B (en) * | 2018-12-13 | 2021-01-01 | 京东方科技集团股份有限公司 | Electroluminescent device, preparation method thereof and display device |
| CN109950419B (en) * | 2019-03-25 | 2021-02-26 | 京东方科技集团股份有限公司 | OLED device packaging structure, display device and packaging method |
| CN110459678B (en) * | 2019-08-14 | 2022-08-23 | 武汉华星光电半导体显示技术有限公司 | Flexible organic light emitting display panel and preparation method thereof |
| CN111863903B (en) * | 2020-07-23 | 2023-04-18 | 武汉天马微电子有限公司 | Display panel, manufacturing method thereof and display device |
| CN117062484A (en) * | 2023-08-31 | 2023-11-14 | 惠科股份有限公司 | Display panel and preparation method thereof |
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| CN105439132B (en) * | 2015-12-17 | 2018-08-28 | 云南云天化股份有限公司 | A kind of high-heat conductivity graphite material and preparation method thereof |
| CN106867255A (en) * | 2016-11-17 | 2017-06-20 | 达迈科技股份有限公司 | For graphited polyimide film, graphite film and its manufacture method |
| CN106972113B (en) * | 2017-05-25 | 2018-09-11 | 深圳市华星光电技术有限公司 | The package assembling and packaging method of OLED device, display device |
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