CN109994649B - Flexible display panel, preparation method thereof and display device - Google Patents
Flexible display panel, preparation method thereof and display device Download PDFInfo
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- CN109994649B CN109994649B CN201910279632.9A CN201910279632A CN109994649B CN 109994649 B CN109994649 B CN 109994649B CN 201910279632 A CN201910279632 A CN 201910279632A CN 109994649 B CN109994649 B CN 109994649B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
- H10K77/111—Flexible substrates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Abstract
The invention relates to the technical field of display, and discloses a flexible display panel, a preparation method thereof and a display device, wherein the flexible display panel comprises: a flexible substrate, the flexible substrate comprising: a water oxygen barrier layer; the first flexible supporting layer is arranged on one side of the water and oxygen barrier layer; the first flexible protective layer is arranged on one side, away from the water and oxygen blocking layer, of the first flexible supporting layer; the second flexible supporting layer is arranged on one side, away from the first flexible supporting layer, of the water and oxygen blocking layer; and the anode layer is positioned on one side of the second flexible protective layer, which deviates from the second flexible supporting layer. In the flexible display panel, the flexibility, the mechanical property and the barrier property of the flexible substrate are good, the comprehensive property of the flexible substrate is good, the flexible display panel is suitable for the flexible display panel, and the problem that the substrate in the flexible display panel in the prior art is poor in flexibility and mechanical property or poor in comprehensive properties such as heat resistance and barrier property is effectively solved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display panel, a preparation method thereof and a display device.
Background
With the development of display technology and the demand of people, flexible display screens become one of the more popular research projects in the current display field, at present, substrates of flexible display screen OLED display panels mostly adopt thin glass substrates, metal foil substrates or polymer substrates, and the like, wherein the flexibility and the mechanical property of glass are poor, and the flexible display panels are not suitable for being applied; the roughness of the metal foil substrate is high, and the display device is easy to fall off when the metal foil substrate is bent; the heat resistance and the barrier property of the polymer are poor, and the polymer is not suitable for a high-heat integrated circuit, and the service life of the device is affected, so in summary, the use performance of the substrate in the flexible OLED display panel in the prior art is poor, and the applicability to the flexible display panel is poor, so that a flexible substrate suitable for the flexible OLED display panel is urgently needed.
Disclosure of Invention
The invention discloses a flexible display panel, a preparation method thereof and a display device, wherein the flexible display panel has better flexibility, mechanical property and barrier property of a flexible substrate, has better comprehensive property as the flexible substrate, is suitable for the flexible display panel, and effectively solves the problem that the substrate in the flexible display panel in the prior art has poor comprehensive properties such as flexibility, mechanical property or heat resistance and barrier property.
In order to achieve the purpose, the invention provides the following technical scheme:
a flexible display panel comprising: the electroluminescent device comprises a flexible substrate, an anode layer arranged on the flexible substrate, an electroluminescent layer positioned on the anode layer, a cathode layer positioned on the electroluminescent layer and an encapsulation layer used for encapsulating the anode layer, the electroluminescent layer and the cathode layer;
wherein the flexible substrate comprises:
a water oxygen barrier layer;
the first flexible supporting layer is arranged on one side of the water and oxygen barrier layer;
the first flexible protective layer is arranged on one side, away from the water and oxygen barrier layer, of the first flexible supporting layer;
the second flexible supporting layer is arranged on one side, away from the first flexible supporting layer, of the water and oxygen barrier layer;
locate the flexible supporting layer of second deviates from the flexible protective layer of second of water oxygen barrier layer one side, the anode layer is located the flexible protective layer of second deviates from one side of the flexible supporting layer of second.
In the flexible display panel, the flexible substrate is a laminated structure layer composed of a plurality of film layers, and the flexible substrate can specifically comprise a water-oxygen barrier layer, the water-oxygen barrier layer plays a role in blocking external oxygen and water vapor, one side of the water-oxygen barrier layer is provided with a first flexible supporting layer, the flexible substrate is opposite to the first flexible supporting layer, the other side, opposite to the first flexible supporting layer, of the water-oxygen barrier layer is provided with a second flexible supporting layer, the first flexible supporting layer and the second flexible supporting layer play a role in supporting the whole display panel, the first flexible supporting layer is provided with a flexible protective layer, the opposite side is provided with a second flexible protective layer, the first flexible protective layer and the second flexible protective layer respectively play a role in protecting the first flexible protective layer and the second flexible protective layer, the flexible substrate can block external water vapor, Oxygen and the like have good barrier property, good flexible supporting property and good mechanical property, so that the flexible substrate has good comprehensive properties as a substrate of the flexible display panel, is very suitable for the flexible display panel, and effectively solves the problems of poor comprehensive properties such as poor flexibility and mechanical property or poor heat resistance and barrier property of the substrate of the flexible display panel in the prior art.
Therefore, in the flexible display panel, the flexibility, the mechanical property and the barrier property of the flexible substrate are good, and the flexible substrate has good comprehensive properties and is suitable for the flexible display panel, so that the problems of poor flexibility and mechanical property or poor heat resistance and barrier property of the substrate in the flexible display panel in the prior art are effectively solved.
Optionally, the water oxygen barrier layer comprises a metal foil layer.
Optionally, the first flexible protective layer and the second flexible protective layer are both polymer film layers.
Optionally, the first flexible support layer and the second flexible support layer are both layers of a nanocellulose membrane.
Optionally, the anode layer is a carbon nanotube film layer.
Optionally, the encapsulation layer includes a second polymer film layer and a second nanocellulose film layer, which are alternately stacked in sequence, and the second polymer film layers are respectively located at the outermost sides of two sides of the encapsulation layer.
Optionally, the second layer of nanocellulose membrane is doped with water-absorbing particles.
The invention also provides a display device which comprises any one of the flexible display panels provided in the technical scheme.
The invention also provides a preparation method of the flexible display panel, which comprises the following steps:
forming a flexible substrate, wherein the flexible substrate comprises: the water oxygen barrier layer, a first flexible supporting layer arranged on one side of the water oxygen barrier layer, a first flexible protective layer arranged on one side of the first flexible supporting layer, which is far away from the water oxygen barrier layer, a second flexible supporting layer arranged on one side of the water oxygen barrier layer, which is far away from the first flexible supporting layer, and a second flexible protective layer arranged on one side of the second flexible supporting layer, which is far away from the water oxygen barrier layer;
forming an anode layer on a side of the second flexible protective layer facing away from the second flexible support layer;
forming an electroluminescent layer on a side of the anode layer facing away from the second flexible support layer;
forming a cathode layer on a side of the electroluminescent layer facing away from the anode layer;
and forming a packaging layer for packaging the anode layer, the electroluminescent layer and the cathode layer on one side of the cathode layer, which is far away from the electroluminescent layer, wherein the packaging layer is connected with the second flexible protective layer.
Optionally, the forming an anode layer on a side of the second flexible protective layer facing away from the second flexible support layer comprises:
and forming a carbon nanotube film on the second flexible protective layer by adopting a flexible printing process or a self-assembly process, wherein the carbon nanotube film forms the anode layer.
Optionally, the forming an electroluminescent layer on a side of the anode layer facing away from the second flexible support layer and a cathode layer on a side of the electroluminescent layer facing away from the anode layer comprises:
forming the electroluminescent layer on the anode layer by using a flexible printing process or a self-assembly process; and/or the presence of a gas in the gas,
forming the cathode layer on the electroluminescent layer using a flexible printing process or a self-assembly process.
Drawings
Fig. 1 is a schematic structural diagram of a flexible display panel according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for manufacturing a flexible display panel according to an embodiment of the present invention;
icon: 1-a flexible substrate; 2-an anode layer; 3-an electroluminescent layer; 4-a cathode layer; 5-packaging layer; 11-water oxygen barrier layer; 12-a first flexible support layer; 13-a first flexible protective layer; 14-a second flexible support layer; 15-a second flexible protective layer; 51-a second polymer film layer; 52-second layer of nanocellulose membrane.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.
As shown in fig. 1, an embodiment of the present invention provides a flexible display panel, including: the electroluminescent display device comprises a flexible substrate 1, an anode layer 2 arranged on the flexible substrate 1, an electroluminescent layer 3 positioned on the anode layer 2, a cathode layer 4 positioned on the electroluminescent layer 3, and a packaging layer 5 for packaging the anode layer 2, the electroluminescent layer 3 and the cathode layer 4;
wherein the flexible substrate 1 includes: a water oxygen barrier layer 11; a first flexible support layer 12 disposed on one side of the water oxygen barrier layer 11; the first flexible protective layer 13 is arranged on one side, away from the water and oxygen barrier layer 11, of the first flexible supporting layer 12; a second flexible support layer 14 arranged on the side of the water oxygen barrier layer 11 facing away from the first flexible support layer 12; and a second flexible protection layer 15 arranged on the side of the second flexible support layer 14 facing away from the water-oxygen barrier layer 11, wherein the anode layer 2 is arranged on the side of the second flexible protection layer 15 facing away from the second flexible support layer 14.
In the flexible display panel, the flexible substrate 1 is a laminated structure layer composed of a plurality of film layers, and the flexible substrate 1 may specifically include a water-oxygen barrier layer 11, the water-oxygen barrier layer 11 plays a role in blocking external oxygen and water vapor, one side of the water-oxygen barrier layer 11 is provided with a first flexible support layer 12, and the other side of the water-oxygen barrier layer 11 opposite to the first flexible support layer 12 is provided with a second flexible support layer 14, the first flexible support layer 12 and the second flexible support layer 14 play a role in supporting the whole display panel, the first flexible support layer 12 is provided with a flexible protection layer, and the other side of the first flexible support layer 12 is provided with a second flexible protection layer 15, and the first flexible protection layer 13 and the second flexible protection layer 15 play a role in protecting the first flexible protection layer 13 and the second flexible protection layer 15 respectively, the flexible substrate 1 can block outside water vapor, oxygen and the like, has good blocking performance, has good flexible supporting performance and good mechanical performance, so that the flexible substrate 1 has good comprehensive properties as a substrate of the flexible display panel, is very suitable for the flexible display panel, and effectively solves the problems of poor comprehensive properties such as poor flexibility and mechanical performance or poor heat resistance and blocking performance of the substrate of the flexible display panel in the prior art.
Therefore, in the flexible display panel, the flexible substrate 1 has good flexibility, mechanical properties and barrier properties, and is good as the flexible substrate 1, so that the flexible display panel is suitable for the flexible display panel, and the problems of poor flexibility and mechanical properties or poor heat resistance and barrier properties of the substrate in the flexible display panel in the prior art are effectively solved.
Specifically, in the structure of the flexible substrate 1 of the flexible display panel, a plurality of first flexible supporting layers 12 and first flexible protection layers 13 which are alternately stacked in sequence may be disposed on one side of the water and oxygen barrier layer 11, and the first flexible protection layer 13 is disposed on the outermost layer of the one side; set up the flexible supporting layer 14 of multilayer alternative setting and the flexible protective layer 15 of second in proper order at the opposite side of water oxygen barrier layer 11, and this side is located outmost being flexible protective layer 15 of second, and wherein, the number of piles setting of each layer can be according to actual demand concrete setting, and this embodiment does not do the limitation.
Specifically, water oxygen barrier layer 11 can be metal foil layer, and metal foil layer has excellent separation performance, can play better barrier effect to external oxygen and vapor, and specifically, metal foil materials such as aluminium foil can be chooseed for use to metal foil layer.
Specifically, in the flexible display panel, the first flexible supporting layer 12 and the second flexible supporting layer 14 may be a nano cellulose film layer, and the nano cellulose film layer has excellent mechanical properties, flexibility, chemical stability, light weight, and high strength, and plays a role in supporting the entire flexible display panel, so that the flexible display panel has good mechanical properties and good extensibility on the basis of good flexibility.
In the above flexible display panel, the first flexible protection layer 13 and the second flexible protection layer 15 may be both polymer film layers, which are wear-resistant, scratch-resistant, and moisture-resistant, and can protect the nano cellulose film layer, and the second flexible protection layer may serve as a bearing cross section of the anode layer 2, specifically, the polymer film layer may be made of polymer such as PE, PA, or PET.
Specifically, the anode layer 2 in the flexible display screen is a carbon nanotube film layer, the carbon nanotube film layer has excellent conductivity and chemical stability, the carbon nanotube film layer is used as the anode layer 2, the barrier standard of the encapsulation layer 5 can be reduced, the process requirement is simplified, the preparation is convenient, the carbon nanotube film layer can be selected from modified carbon nanotube materials, the modified carbon nanotubes have good printability and water solubility, a carbon nanotube film layer can be printed or self-assembled on the flexible substrate 1 through a flexible printing and self-assembly process to form the anode layer 2, the preparation process is simple, and the flexible display screen is suitable for the flexible substrate 1.
Specifically, the encapsulation layer 5 includes a second polymer film layer 51 and a second nanocellulose film layer 52 which are stacked in turn and arranged alternately, and the second polymer film layer 51 is located at the outermost side of the two sides of the encapsulation layer 5 respectively, and the number of each layer can be selected and arranged according to actual requirements, which is not limited in this embodiment, wherein the encapsulation layer 5 is formed by alternately stacking the second polymer film layer 51 and the second nanocellulose film layer 52, which has good flexibility and mechanical properties, the second polymer film layer 51 is located at the outermost side of the stacked structure, and plays a role in protecting the film layer located in the middle of the stacked structure, specifically, the second nanocellulose film layer 52 is doped with water absorbing particles, which can prevent external oxygen and water vapor from entering the display panel and absorb water vapor released by the flexible display panel.
Wherein, the granule that absorbs water is nanometer granule, and the granule that absorbs water includes: the starch-based nanoparticles, polyvinyl alcohol-based nanoparticles, and polyvinyl acid salt-based nanoparticles may be other water-absorbing particles, and the present embodiment is not limited thereto.
Based on the same inventive concept, the embodiment of the present invention further provides a display device, including any one of the flexible display panels provided in the above technical solutions.
In addition, based on the same inventive concept, as shown in fig. 1 and fig. 2, another embodiment of the present invention provides a method for manufacturing a flexible display panel, including:
step S101, forming a flexible substrate 1, wherein the flexible substrate 1 includes: the water and oxygen barrier layer 11, a first flexible supporting layer 12 arranged on one side of the water and oxygen barrier layer 11, a first flexible protective layer 13 arranged on one side of the first flexible supporting layer 12, which is far away from the water and oxygen barrier layer 11, a second flexible supporting layer 14 arranged on one side of the water and oxygen barrier layer 11, which is far away from the first flexible supporting layer 12, and a second flexible protective layer 15 arranged on one side of the second flexible supporting layer, which is far away from the water and oxygen barrier layer 11;
step S102, forming an anode layer 2 on one side of the second flexible protection layer, which is far away from the second flexible support layer;
step S103, forming an electroluminescent layer 3 on one side of the anode layer 2 departing from the second flexible supporting layer;
step S104, forming a cathode layer 4 on one side of the electroluminescent layer 3, which is far away from the anode layer 2;
step S105, a packaging layer 5 for packaging the anode layer 2, the electroluminescent layer 3 and the cathode layer 4 is formed on the side of the cathode layer 4 away from the electroluminescent layer 3, and the packaging layer 5 is connected to the second flexible protection layer 15.
In the flexible display panel prepared by the preparation method, the flexibility, the mechanical property and the barrier property of the flexible substrate 1 are good, the flexible substrate 1 has good comprehensive properties, is suitable for the flexible display panel, and effectively solves the problems of poor flexibility and mechanical property or poor heat resistance and barrier property of the substrate in the flexible display panel in the prior art.
Specifically, in step S102, the forming the anode layer 2 on the side of the second flexible protection layer away from the second flexible support layer specifically includes: and forming a carbon nanotube film on the second flexible protective layer by adopting a flexible printing process or a self-assembly process, wherein the carbon nanotube film forms the anode layer 2. The carbon nanotube film is prepared by adopting a flexible printing process or a self-assembly process as the anode layer 2, wherein the flexible printing process or the self-assembly process does not need a high-temperature and high-pressure environment, the preparation requirement is reduced, a rigid substrate is not needed as a carrier, the preparation method is suitable for preparing the flexible display panel, the production efficiency and the yield are high, and the manufacturing cost is favorably reduced.
Specifically, in steps S104 and S105, the forming of the electroluminescent layer 3 on the side of the anode layer 2 facing away from the second flexible support layer and the forming of the cathode layer 4 on the side of the electroluminescent layer 3 facing away from the anode layer 2 specifically include:
the electroluminescent layer 3 is formed on the anode layer 2 by adopting a flexible printing process or a self-assembly process, or the cathode layer 4 is formed on the electroluminescent layer 3 by adopting a flexible printing process or a self-assembly process, or the electroluminescent layer 3 and the cathode layer 4 are formed by adopting a flexible printing process or a self-assembly process.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of 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. A flexible display panel, comprising: the electroluminescent device comprises a flexible substrate, an anode layer arranged on the flexible substrate, an electroluminescent layer positioned on the anode layer, a cathode layer positioned on the electroluminescent layer and an encapsulation layer used for encapsulating the anode layer, the electroluminescent layer and the cathode layer;
wherein the flexible substrate comprises:
a water oxygen barrier layer;
the first flexible supporting layer is arranged on one side of the water and oxygen barrier layer;
the first flexible protective layer is arranged on one side, away from the water and oxygen barrier layer, of the first flexible supporting layer;
the second flexible supporting layer is arranged on one side, away from the first flexible supporting layer, of the water and oxygen barrier layer;
the anode layer is positioned on one side, away from the second flexible supporting layer, of the second flexible supporting layer;
the packaging layer comprises a second polymer film layer and a second nano cellulose film layer which are alternately stacked in sequence, and the second polymer film layers are respectively positioned at the outermost sides of the two sides of the packaging layer; the second nano cellulose membrane layer is doped with water-absorbing particles.
2. The flexible display panel of claim 1, wherein the water oxygen barrier layer comprises a metal foil layer.
3. The flexible display panel of claim 1, wherein the first and second flexible protective layers are both polymer film layers.
4. The flexible display panel of any of claims 1-3, wherein the first flexible support layer and the second flexible support layer are each a layer of nanocellulose film.
5. The flexible display panel of claim 1, wherein the anode layer is a carbon nanotube film layer.
6. A display device comprising the flexible display panel according to any one of claims 1 to 5.
7. A method for manufacturing a flexible display panel, comprising:
forming a flexible substrate, wherein the flexible substrate comprises: the water oxygen barrier layer, a first flexible supporting layer arranged on one side of the water oxygen barrier layer, a first flexible protective layer arranged on one side of the first flexible supporting layer, which is far away from the water oxygen barrier layer, a second flexible supporting layer arranged on one side of the water oxygen barrier layer, which is far away from the first flexible supporting layer, and a second flexible protective layer arranged on one side of the second flexible supporting layer, which is far away from the water oxygen barrier layer;
forming an anode layer on a side of the second flexible protective layer facing away from the second flexible support layer;
forming an electroluminescent layer on a side of the anode layer facing away from the second flexible support layer;
forming a cathode layer on a side of the electroluminescent layer facing away from the anode layer;
forming a packaging layer for packaging the anode layer, the electroluminescent layer and the cathode layer on one side of the cathode layer, which is far away from the electroluminescent layer, wherein the packaging layer is connected with the second flexible protective layer; the packaging layer comprises a second polymer film layer and a second nano cellulose film layer which are alternately stacked in sequence, and the second polymer film layers are respectively positioned at the outermost sides of the two sides of the packaging layer; the second nano cellulose membrane layer is doped with water-absorbing particles.
8. The method of claim 7, wherein the forming an anode layer on a side of the second flexible protective layer facing away from the second flexible support layer comprises:
and forming a carbon nanotube film on the second flexible protective layer by adopting a flexible printing process or a self-assembly process, wherein the carbon nanotube film forms the anode layer.
9. A method according to claim 7 or 8, wherein the forming an electroluminescent layer on a side of the anode layer facing away from the second flexible support layer and a cathode layer on a side of the electroluminescent layer facing away from the anode layer comprises:
forming the electroluminescent layer on the anode layer by using a flexible printing process or a self-assembly process; and/or the presence of a gas in the gas,
forming the cathode layer on the electroluminescent layer using a flexible printing process or a self-assembly process.
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| CN106711345A (en) * | 2015-11-12 | 2017-05-24 | 宁波长阳科技股份有限公司 | Flexible transparent barrier film and preparation method thereof |
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| CN108269824A (en) * | 2016-12-30 | 2018-07-10 | 上海和辉光电有限公司 | Flexible display panels and its manufacturing method, flexible display device |
| CN107680994A (en) * | 2017-10-30 | 2018-02-09 | 武汉华星光电半导体显示技术有限公司 | A kind of flexible OLED display panel and preparation method thereof |
| CN108258151A (en) * | 2018-01-19 | 2018-07-06 | 云谷（固安）科技有限公司 | Packaging film, flexible display apparatus and packaging film forming method |
| CN108447988A (en) * | 2018-01-19 | 2018-08-24 | 云谷（固安）科技有限公司 | A kind of flexible substrate and preparation method thereof, display device |
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