CN114551757A - Display panel and electronic device - Google Patents

Display panel and electronic device Download PDF

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Publication number
CN114551757A
CN114551757A CN202210124619.8A CN202210124619A CN114551757A CN 114551757 A CN114551757 A CN 114551757A CN 202210124619 A CN202210124619 A CN 202210124619A CN 114551757 A CN114551757 A CN 114551757A
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CN
China
Prior art keywords
layer
display panel
substrate
display
protective layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210124619.8A
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Chinese (zh)
Inventor
黄思雨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Publication date
Application filed by Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to CN202210124619.8A priority Critical patent/CN114551757A/en
Publication of CN114551757A publication Critical patent/CN114551757A/en
Pending legal-status Critical Current

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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
    • H10K50/841—Self-supporting sealing arrangements
    • 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
    • H10K50/842—Containers
    • H10K50/8423—Metallic sealing arrangements
    • 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
    • H10K50/842—Containers
    • H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
    • 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
    • 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
    • H10K50/8445—Encapsulations multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • 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 application provides a display panel and electronic equipment, this electronic equipment includes display panel, display panel includes the substrate base plate, show the functional layer, protective layer and sealing layer, the sealing layer sets up in the periphery that shows the functional layer, the relative both ends of sealing layer are connected in substrate base plate and protective layer, the sealing layer is including the first portion and the second portion that bond each other, utilize steam and oxygen among the better first portion separation external environment of separation water oxygen ability, and utilize the better second portion of viscidity to bond substrate base plate and protective layer, with this ability that improves display panel at the separation water oxygen of encapsulation side, reduce because water oxygen invades and leads to the impaired risk of OLED device.

Description

Display panel and electronic device
Technical Field
The application relates to the technical field of display, in particular to a display panel and electronic equipment.
Background
The Organic Light Emitting Diode (OLED) display technology has a wide application in the display field, the intelligent wearing field and other fields due to its advantages of good self-luminous property, high contrast, fast response, flexible display and the like.
The existing top-emission rigid OLED display panel is mainly packaged by glass, that is, a substrate of the OELD display panel is adhered to packaging glass by a sealant to form a relatively closed environment. Because the sealant is usually made of modified epoxy resin materials, the capability of blocking water and oxygen of the OLED display panel at the packaging side is limited, and water vapor and oxygen in the external environment can invade the OLED display panel through the sealant, so that the OLED device is damaged.
In summary, the conventional top-emission rigid OLED display panel has a problem that the OLED device is damaged due to limited water and oxygen blocking capability of the encapsulation side. Therefore, it is desirable to provide a display panel and an electronic device to improve the defect.
Disclosure of Invention
The embodiment of the application provides a display panel and electronic equipment, which are used for improving the water and oxygen blocking capability of a top-emission rigid OLED display panel on the packaging side and reducing the risk of damage of an OLED device.
The embodiment of the present application provides a display panel, display panel includes:
a substrate base plate;
the display function layer is arranged on the substrate base plate;
the protective layer is arranged on one side, away from the substrate, of the display function layer; and
the sealing layer is arranged on the periphery of the display functional layer, and two opposite ends of the sealing layer are respectively connected to the substrate base plate and the protective layer;
wherein the sealing layer comprises a first portion and a second portion bonded to each other, the first portion having a greater water and oxygen barrier capacity than the second portion, the first portion having a lower tackiness than the second portion.
According to an embodiment of the present application, one end of the first portion is connected to one of the substrate base plate and the protective layer, and the opposite end of the first portion is connected to the other of the substrate base plate and the protective layer or the second portion.
According to an embodiment of the present application, opposite ends of the second portion are connected to opposite ends of the first portion and the other of the base substrate and the protective layer, respectively.
According to an embodiment of the application, the thickness of the first portion is larger than the thickness of the second portion.
According to an embodiment of the present application, the display panel further includes an encapsulation layer and a filling layer, the encapsulation layer covers the display function layer, and the filling layer covers the encapsulation layer;
the sealing layer is arranged on the peripheries of the packaging layer and the filling layer, and the thickness of the first portion is larger than that of the packaging layer.
According to an embodiment of the present application, the display panel further includes an auxiliary sealing layer, the auxiliary sealing layer is disposed on a side of the sealing layer close to or far from the display function layer;
the auxiliary sealing layer comprises a third portion and a fourth portion which are bonded with each other, the water and oxygen blocking capacity of the third portion is larger than that of the fourth portion, the viscosity of the third portion is smaller than that of the fourth portion, and the third portion and the first portion are arranged in a staggered mode.
According to an embodiment of the present application, opposite ends of the second portion are respectively connected to the substrate base plate and the protective layer, and the first portion is disposed at a side of the second portion close to or far away from the display function layer.
According to an embodiment of the application, the material of the first portion comprises a self-passivating metallic material or an inorganic non-metallic material, and the material of the second portion comprises an epoxy resin.
According to an embodiment of the present application, the self-passivating metallic material comprises aluminum or titanium, and the inorganic non-metallic material comprises silicon.
The embodiment of the application also provides an electronic device which comprises the display panel.
The beneficial effects of the embodiment of the application are as follows: the embodiment of the application provides a display panel and an electronic device, the electronic device comprises a display panel, the display panel comprises a substrate, a display function layer, a protective layer and a sealing layer, wherein the sealing layer is arranged on the periphery of the display function layer, opposite ends of the sealing layer are respectively connected to the base substrate and the protective layer, the sealing layer includes a first portion and a second portion bonded to each other, the first portion having a greater water and oxygen barrier capacity than the second portion, the first portion having a lesser tackiness than the second portion, so as to utilize the first part with better water and oxygen blocking capability to block water vapor and oxygen in the external environment, and utilize the second part with better viscosity to bond the substrate base plate and the protective layer, therefore, the capability of blocking water and oxygen at the packaging side of the display panel is improved, and the risk of damage to the OLED device caused by water and oxygen intrusion is reduced.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic plan view illustrating a display panel according to an embodiment of the present disclosure;
FIG. 2 is a schematic cross-sectional view of a first display panel along the A-A direction according to an embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view of a second display panel along the A-A direction according to an embodiment of the present disclosure;
FIG. 4 is a schematic cross-sectional view along the A-A direction of a third display panel provided in the embodiments of the present application;
FIG. 5 is a schematic cross-sectional view of a fourth display panel along the A-A direction according to an embodiment of the present application;
FIG. 6 is a schematic cross-sectional view of a fifth display panel along the A-A direction according to an embodiment of the present disclosure;
FIG. 7 is a schematic cross-sectional view of a sixth display panel along the A-A direction according to an embodiment of the present application;
fig. 8a to 8e are schematic flow structure diagrams of a manufacturing method of a display panel according to an embodiment of the present application.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments that can be implemented by the application. Directional phrases used in this application, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting. In the drawings, elements having similar structures are denoted by the same reference numerals.
The present application is further described with reference to the following drawings and detailed description.
An embodiment of the present application provides a display panel, as shown in fig. 1, fig. 1 is a schematic plan view of the display panel provided in the embodiment of the present application, and the display panel 100 includes a display area AA and a non-display area NA disposed at a periphery of the display area AA and surrounding the display area AA.
As shown in fig. 2, fig. 2 is a schematic cross-sectional view along a-a direction of a first display panel provided in the embodiment of the present application, and the display panel 100 includes a substrate 10, a display functional layer 20, and a protective layer 30.
The substrate base plate 10 includes a substrate and a thin film transistor array layer disposed on the substrate. The substrate can be a glass substrate or a polyimide substrate, a plurality of thin film transistors, capacitors and a plurality of signal wires are arranged in the thin film transistor array layer, and the thin film transistors, the capacitors and the signal wires form a pixel driving circuit for driving the display device to emit light.
The display function layer 20 includes a plurality of light emitting devices, which may be organic light emitting diodes. Specifically, the display function layer includes a flat layer 21 provided on the substrate 10, a light emitting layer 22, and a cathode layer 23 covering the flat layer 21 and the light emitting layer 22.
In the embodiment of the present application, the protection layer 30 is encapsulation glass. In practical applications, the protective layer 30 may also be made of other transparent hard materials.
The display panel 100 further includes an encapsulation layer 40, and the encapsulation layer 40 covers the display function layer 20 and the substrate. The encapsulation layer 40 is disposed in the display area AA and the non-display area NA located at the outer periphery of the display area AA to prevent external moisture and oxygen from invading the display function layer 20 to damage the light emitting device.
In the embodiment of the present application, the display panel 100 is a top-emission rigid OLED display panel, and the encapsulation layer 40 may be an inorganic encapsulation layer formed by an inorganic material through a Plasma Enhanced Chemical Vapor Deposition (PECVD) process. The inorganic material may be any one of silicon nitride, silicon oxide, or silicon oxynitride.
In practical applications, the structure of the encapsulation layer is not limited to one inorganic encapsulation layer in the above embodiments, but may be a stacked structure formed by multiple inorganic encapsulation layers or a stacked structure formed by stacking an inorganic encapsulation layer and an organic encapsulation layer.
The display panel 100 further includes a filling layer 50, wherein the filling layer 50 is disposed between the encapsulation layer 40 and the protection layer 30, and covers the encapsulation layer 40 to fill a gap between the protection layer 30 and the encapsulation layer 40 and support the protection layer 30. The filling layer 50 may be a transparent resin adhesive.
The display panel 100 further includes a sealing layer 60, wherein the sealing layer 60 is disposed at the periphery of the display function layer 20, the encapsulation layer 40 and the filling layer 50, and surrounds the display function layer 20, the encapsulation layer 40 and the filling layer 50. The sealing layer 60 is disposed between the substrate 10 and the protection layer 30, and opposite ends of the sealing layer 60 are respectively connected to the substrate 10 and the protection layer 30, so as to form a closed space enclosing the display functional layer 20, the encapsulation layer 40, and the filling layer 50 with the substrate 10 and the protection layer 30, and prevent water vapor and oxygen in the external environment from entering the display functional layer 20.
Further, the sealing layer 60 includes a first portion 61 and a second portion 62 bonded to each other, the first portion 61 having a greater water and oxygen barrier capacity than the second portion 62, and the first portion 61 having a lower viscosity than the second portion 62.
It should be noted that, in the embodiment of the present application, the first portion 61 of the sealing layer 60 is made of a material with a large water sample blocking capability, the first portion 61 is mainly used to prevent water vapor and oxygen in the external environment from entering the display panel 100, the second portion 62 is made of a material with a large viscosity, the second portion 62 is mainly used to bond the substrate 10 and the protective layer 30, so as to prevent the substrate 10, the first portion 61, and the protective layer 30 from being peeled off and generating gaps, and at the same time, the sealing layer can also have a function of blocking water vapor and oxygen in the external environment from entering the display panel 100.
In the embodiment of the present application, the material of the first portion 61 includes a self-passivating metallic material or an inorganic non-metallic material, and the material of the second portion 62 includes an epoxy resin.
Specifically, the self-passivating metallic material may be aluminum (Al) or titanium (Ti), and the self-passivating metallic material of the first portion 61 self-passivates and forms a dense metal oxide, such as Al, after contacting with water vapor and oxygen in the external environment2O3Or TiO2The metal oxide can further enhance the water and oxygen blocking capability of the first portion 61, so that the risk of the light-emitting device failure caused by water and oxygen invasion can be effectively reduced.
In other embodiments, the first portion 61 may be made of an inorganic non-metallic material, and the first portion 61 made of the inorganic non-metallic material may also have a water and oxygen barrier capability better than that of epoxy resin. Specifically, the inorganic non-metallic material may include, but is not limited to, any one of silicon oxide, silicon nitride, or silicon oxynitride.
Further, one end of the first portion 61 is connected to one of the base substrate 10 and the protective layer 30, and the opposite end of the first portion 61 is connected to the other of the base substrate 10 and the protective layer 30 or the second portion 62.
In one embodiment, opposite ends of the second portion are connected to opposite ends of the first portion and the other of the base substrate and the protective layer, respectively.
As shown in fig. 2, one end of the first portion 61 is connected to the substrate base plate 10, the other end of the first portion 61 is connected to the second portion 62, and one end of the second portion 62 away from the first portion 61 is connected to the protective layer 30.
Further, the thickness of the first portion 61 is greater than the thickness of the second portion 62.
As shown in fig. 2, the thickness of the first portion 61 in the thickness direction of the display panel is greater than the thickness of the second portion 62 in the thickness direction of the display panel, so that the water and oxygen barrier capability of the sealing layer 60 can be improved by increasing the thickness of the first portion 61, thereby further reducing the risk of damage to the light emitting device due to water and oxygen intrusion.
Further, the thickness of the first portion 61 is greater than the thickness of the encapsulation layer 40.
As shown in fig. 2, the thickness of the first portion 61 in the thickness direction of the display panel is larger than the thickness of the encapsulating layer 40. It should be noted that if the thickness of the first portion 61 is smaller than the thickness of the encapsulation layer 40, the second portion 62 will contact with the encapsulation layer 40, and moisture and oxygen in the external environment may enter the display functional layer 20 through the second portion 62 and the encapsulation layer 40 and damage the light emitting device in the display functional layer 20. By making the thickness of the first portion 61 in the thickness direction of the display panel larger than the thickness of the encapsulating layer 40, the second portion 62 can be brought into contact with the filling layer 50, so that the path of water and oxygen intrusion into the display functional layer 20 can be increased, and the risk of damage to the light emitting device due to water and oxygen intrusion can be further reduced.
In one embodiment, as shown in fig. 3, fig. 3 is a schematic cross-sectional view of a second display panel provided in the embodiment of the present application along a direction a-a, and it should be noted that the second display panel shown in fig. 3 has substantially the same structure as the first display panel shown in fig. 2, except that: in the second display panel shown in fig. 3, one end of the first portion 61 is connected to the protective layer 30, the other opposite end of the first portion 61 is connected to the second portion 62, and one end of the second portion 62 far from the first portion 61 is connected to the substrate 10, so that the capability of the sealing layer 60 to block water and oxygen can be also improved, and the risk of the light emitting device failure caused by the invasion of water and oxygen can be further reduced.
In one embodiment, the display panel further includes an auxiliary sealing layer disposed on a side of the sealing layer close to or away from the display functional layer, the auxiliary sealing layer includes a third portion and a fourth portion bonded to each other, the third portion has a water-oxygen barrier capacity greater than that of the fourth portion, the third portion has a viscosity less than that of the fourth portion, and the third portion is disposed to intersect with the first portion.
As shown in fig. 4, fig. 4 is a schematic cross-sectional view of a third display panel along a direction a-a according to an embodiment of the present application, and it should be noted that the third display panel shown in fig. 4 has substantially the same structure as the first display panel shown in fig. 2, except that: in the third display panel shown in fig. 4, the display panel further includes a secondary sealing layer 70, and the secondary sealing layer 70 is disposed on a side of the sealing layer 60 away from the display function layer 20 and surrounds the sealing layer 60. The auxiliary sealing layer 70 includes a third portion 71 and a fourth portion 72 bonded to each other, one end of the third portion 71 is connected to the protective layer 30, the other end of the third portion 71 is connected to the fourth portion 72, and one end of the fourth portion 72, which is far from the third portion 71, is connected to the substrate 10.
The third portion 71 has a water and oxygen barrier capacity greater than that of the fourth portion 72, and the third portion 71 has a viscosity less than that of the fourth portion 72. The material of the third portion 71 may be the same as that of the first portion 61 of the sealing layer 60, the material of the fourth portion 72 may be the same as that of the second portion 62, the third portion 71 is staggered with respect to the first portion 61, and the second portion 62 is staggered with respect to the fourth portion 72, so that a path through which moisture and oxygen in the external environment may intrude from the first portion 61 into the display panel may be cut off by the staggered first portion 61 and the third portion 71, and the adhesion between the substrate 10 and the protective layer 30 may be improved by the staggered second portion 62 and the fourth portion 72, thereby further improving the sealing effect of the display panel.
As shown in fig. 5, fig. 5 is a schematic cross-sectional view of a fourth display panel along the a-a direction according to the embodiment of the present application, and it should be noted that the fourth display panel shown in fig. 5 has substantially the same structure as the third display panel shown in fig. 4, except that: in the fourth display panel shown in fig. 5, one end of the first portion 61 of the sealing layer 60 is connected to the protective layer 30, the opposite end of the first portion 61 is connected to the second portion 62, and one end of the second portion 62 away from the first portion 61 is connected to the base substrate 10. One end of the third portion 71 of the auxiliary sealing layer 70 is connected to the substrate 10, the other end of the third portion 71 is connected to the fourth portion 72, and one end of the fourth portion 72, which is away from the third portion 71, is connected to the protective layer 30. The first portions 61 and the third portions 71 are arranged in a staggered manner, and the second portions 62 and the fourth portions 72 are arranged in a staggered manner, so that paths of moisture and oxygen in the external environment, which may enter the inside of the display panel from the first portions 61, are cut off by the staggered first portions 61 and the staggered third portions 71, and meanwhile, the viscosity between the substrate 10 and the protective layer 30 can be improved by the staggered second portions 62 and the staggered fourth portions 72, so that the sealing effect of the display panel can be further improved.
In one embodiment, the opposite ends of the second portion 62 are respectively connected to the substrate 10 and the protective layer 30, and the first portion 61 is disposed on a side of the second portion 62 close to or far from the display function layer 20.
As shown in fig. 6, fig. 6 is a schematic cross-sectional view of a fifth display panel along the a-a direction according to the embodiment of the present application, and it should be noted that the fifth display panel shown in fig. 6 has substantially the same structure as the first display panel shown in fig. 2, and the difference lies in that: in the fifth display panel shown in fig. 6, opposite ends of the first portion 61 are respectively connected to the substrate 10 and the protective layer 30, and opposite ends of the second portion 62 are also respectively connected to the substrate 10 and the protective layer 30. The first portion 61 is provided on the second portion 62 on the side closer to the display function layer 20. Thus, the second part 62 with high viscosity can be used for improving the viscosity between the substrate base plate 10 and the protective layer 30, and the first part 61 with high water sample separation capacity can be used for cutting off the path of water vapor and oxygen in the external environment penetrating into the display panel through the second part 62, so that the sealing performance of the display panel can be further improved, and the risk of failure of the light-emitting device caused by water and oxygen invasion is reduced.
In other embodiments, the first portion 61 may also be disposed on a side of the second portion 62 away from the display function layer 20, so that the same technical effects as those of the embodiment shown in fig. 6 can be achieved, and details are not repeated herein.
As shown in fig. 7, fig. 7 is a schematic cross-sectional view along the a-a direction of a sixth display panel provided in the embodiment of the present application, and it should be noted that the sixth display panel shown in fig. 7 has substantially the same structure as the fifth display panel shown in fig. 6, except that: in the sixth display panel shown in fig. 7, the second portion 62 includes a main body portion 621 and an extending portion 622 extending from one end of the main body portion 621 connected to the protective layer 30 toward the first portion 61, two opposite ends of the main body portion 621 are respectively connected to the substrate 10 and the protective layer 30, and the extending portion 622 is also connected to the protective layer 30. The first portion 61 is disposed on the main body 621 close to the display function layer 20, one end of the first portion 61 is connected to the substrate 10, and the opposite end of the first portion 61 is connected to the extending portion 622 of the second portion 62, so that the second portion 62 with high viscosity can be respectively bonded to the substrate 10 and the protective layer 30, and the viscosity between the substrate 10 and the protective layer 30 can be further improved.
In some other embodiments, the first portion 61 may also be disposed on a side of the main body 621 of the second portion 62 away from the display function layer 20, so that the same technical effect as the embodiment shown in fig. 7 can be achieved, and details are not repeated here.
According to the display panel provided by the above embodiment of the present application, the embodiment of the present application further provides a manufacturing method of the display panel, and the manufacturing method of the display panel is used for preparing and forming the display panel provided by the above embodiment.
With reference to fig. 8a to 8e, fig. 8a to 8e are schematic flow structure diagrams of a manufacturing method of a display panel according to an embodiment of the present application, where the manufacturing method of the display panel includes:
step S10: a display function layer 20 is formed on the base substrate 10.
As shown in fig. 8a, the substrate 10 includes a substrate and a thin film transistor array layer disposed on the substrate. The substrate can be a glass substrate or a polyimide substrate, a plurality of thin film transistors, capacitors and a plurality of signal wires are arranged in the thin film transistor array layer, and the thin film transistors, the capacitors and the signal wires form a pixel driving circuit for driving the display device to emit light.
The method of step S10 may specifically include: an anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer of the display function layer 20 are sequentially prepared on the substrate 10 which is cleaned.
Step S20: an encapsulation layer 40 covering the display function layer 20 and the base substrate 10 is formed on the base substrate 10.
As shown in fig. 8b, the encapsulation layer 40 includes only one inorganic encapsulation layer. In the actual preparation process, an inorganic material may be used to prepare a formed inorganic encapsulation layer by a Plasma Enhanced Chemical Vapor Deposition (PECVD), where the inorganic material may be any one of silicon nitride, silicon oxide, or silicon oxynitride.
Step S30: a first portion 61 is formed around the display function layer 20 and the encapsulating layer 40.
As shown in fig. 8c, the thickness of the first portion 61 is greater than the thickness of the encapsulation layer 40, and the material of the first portion 61 includes a self-passivation metal material or an inorganic non-metal material.
Specifically, the self-passivating metallic material may be aluminum (Al) or titanium (Ti), and the self-passivating metallic material of the first portion 61 self-passivates and forms a dense metal oxide, such as Al, after contacting with water vapor and oxygen in the external environment2O3Or TiO2The metal oxide can further enhance the water and oxygen blocking capability of the first portion 61, so that the risk of the light-emitting device failure caused by water and oxygen invasion can be effectively reduced.
In the actual manufacturing process, a circle of self-passivation metal material may be sputtered on the edges of the display function layer 20 and the encapsulation layer 40 by a sputtering (sputter) process to form the first portion 61.
In other embodiments, the first portion 61 may be made of an inorganic non-metallic material, and the first portion 61 made of the inorganic non-metallic material may also have a water and oxygen barrier capability better than that of epoxy resin. Specifically, the inorganic non-metallic material may include, but is not limited to, any one of silicon oxide, silicon nitride, or silicon oxynitride.
Step S40: a filling layer 50 is formed on the protective layer 30 in a region corresponding to the encapsulation layer 40 and the display function layer 20, and a second portion 62 is formed in a region corresponding to the first portion 61 around the filling layer 50.
As shown in fig. 8d, the second portion 62 is formed on the periphery of the filling layer 50 and surrounds the filling layer 50. The filling layer 50 may be made of a transparent resin adhesive, and the second portion 62 may be made of epoxy resin.
Step S50: and pressing the side of the substrate base plate 10 on which the display function layer 20 is formed and the side of the protective layer 30 on which the filling layer 50 is formed.
As shown in fig. 8e, after the side of the base substrate 10 on which the display function layer 20 is formed and the side of the protective layer 30 on which the filling layer 50 is formed are pressed, the first portion 61 and the second portion 62 are bonded to form the sealing layer 60.
The first portion 61 has a greater water and oxygen barrier capacity than the second portion 62, and the first portion 61 has a lower viscosity than the second portion 62. It should be noted that, in the embodiment of the present application, the first portion 61 of the sealing layer 60 is made of a material with a large water sample blocking capability, the first portion 61 is mainly used to prevent water vapor and oxygen in the external environment from entering the display panel 100, the second portion 62 is made of a material with a large viscosity, the second portion 62 is mainly used to bond the substrate 10 and the protective layer 30, so as to prevent the substrate 10, the first portion 61, and the protective layer 30 from being peeled off and generating gaps, and at the same time, the sealing layer can also have a function of blocking water vapor and oxygen in the external environment from entering the display panel 100.
According to the display panel and the manufacturing method of the display panel provided by the above embodiment of the present application, an embodiment of the present application further provides an electronic device, where the electronic device includes the display panel provided by the above embodiment, the electronic device may be a mobile terminal, such as a color electronic paper, a color electronic book, a smart phone, or the like, the electronic device may also be a wearable terminal, such as a smart watch, a smart bracelet, or the like, and the electronic device may also be a fixed terminal, such as a color electronic billboard, a color electronic poster, or the like.
The beneficial effects of the embodiment of the application are as follows: the embodiment of the application provides a display panel and an electronic device, the electronic device comprises a display panel, the display panel comprises a substrate, a display function layer, a protective layer and a sealing layer, wherein the sealing layer is arranged on the periphery of the display function layer, opposite ends of the sealing layer are respectively connected to the base substrate and the protective layer, the sealing layer includes a first portion and a second portion bonded to each other, the first portion having a greater water and oxygen barrier capacity than the second portion, the first portion having a lesser tackiness than the second portion, so as to utilize the first part with better water and oxygen blocking capability to block water vapor and oxygen in the external environment, and utilize the second part with better viscosity to bond the substrate base plate and the protective layer, therefore, the capability of blocking water and oxygen at the packaging side of the display panel is improved, and the risk of damage to the OLED device caused by water and oxygen intrusion is reduced.
In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application is defined by the appended claims.

Claims (10)

1. A display panel, comprising:
a substrate base plate;
the display function layer is arranged on the substrate base plate;
the protective layer is arranged on one side, away from the substrate, of the display function layer; and
the sealing layer is arranged at the periphery of the display function layer, and two opposite ends of the sealing layer are respectively connected to the substrate base plate and the protective layer;
wherein the sealing layer comprises a first portion and a second portion bonded to each other, the first portion having a greater water and oxygen barrier capacity than the second portion, the first portion having a lower tackiness than the second portion.
2. The display panel according to claim 1, wherein one end of the first portion is connected to one of the substrate base plate and the protective layer, and an opposite end of the first portion is connected to the other of the substrate base plate and the protective layer or the second portion.
3. The display panel according to claim 2, wherein opposite ends of the second portion are connected to opposite ends of the first portion and the other of the base substrate and the protective layer, respectively.
4. The display panel according to claim 3, wherein a thickness of the first portion is larger than a thickness of the second portion.
5. The display panel of claim 4, further comprising an encapsulation layer covering the display functional layer and a filler layer covering the encapsulation layer;
the sealing layer is arranged on the peripheries of the packaging layer and the filling layer, and the thickness of the first portion is larger than that of the packaging layer.
6. The display panel according to claim 5, further comprising a secondary sealing layer provided on a side of the sealing layer close to or remote from the display functional layer;
the auxiliary sealing layer comprises a third portion and a fourth portion which are bonded with each other, the water and oxygen blocking capacity of the third portion is larger than that of the fourth portion, the viscosity of the third portion is smaller than that of the fourth portion, and the third portion and the first portion are arranged in a staggered mode.
7. The display panel according to claim 2, wherein opposite ends of the second portion are connected to the base substrate and the protective layer, respectively, and the first portion is provided on a side of the second portion closer to or farther from the display function layer.
8. The display panel of claim 1, wherein the material of the first portion comprises a self-passivating metallic material or an inorganic non-metallic material, and the material of the second portion comprises an epoxy resin.
9. The display panel of claim 8, wherein the self-passivating metallic material comprises aluminum or titanium and the inorganic non-metallic material comprises silicon.
10. An electronic device characterized by comprising the display panel according to any one of claims 1 to 9.
CN202210124619.8A 2022-02-10 2022-02-10 Display panel and electronic device Pending CN114551757A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210124619.8A CN114551757A (en) 2022-02-10 2022-02-10 Display panel and electronic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210124619.8A CN114551757A (en) 2022-02-10 2022-02-10 Display panel and electronic device

Publications (1)

Publication Number Publication Date
CN114551757A true CN114551757A (en) 2022-05-27

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230165035A1 (en) * 2019-09-02 2023-05-25 Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Method of manufacturing display panel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230165035A1 (en) * 2019-09-02 2023-05-25 Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Method of manufacturing display panel
US11925050B2 (en) * 2019-09-02 2024-03-05 Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Method of manufacturing display panel

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