WO2018010465A1

WO2018010465A1 - Active-matrix organic light-emitting diode display screen and packaging method thereof, and terminal device

Info

Publication number: WO2018010465A1
Application number: PCT/CN2017/080878
Authority: WO
Inventors: 欧阳世宏; 刘康仲; 郭伟
Original assignee: 华为技术有限公司
Priority date: 2016-07-14
Filing date: 2017-04-18
Publication date: 2018-01-18
Also published as: CN106024841B; CN106024841A

Abstract

Provided are an active-matrix organic light-emitting diode (AMOLED) display screen and a packaging method thereof, and a terminal device. The display screen comprises: an array substrate (10); a package substrate (20); and metal plates (60). The metal plates are located between the array substrate and the package substrate. At least one metal atom located at a first surface of the metal plate and at least one atom located at a packaging region (B) of the package substrate are bonded with the same ligand. Alternatively, the least one metal atom located at the first surface of the metal plate and at least one atom located at a packaging region (A) of the array substrate are bonded with the same ligand. The AMOLED display screen uses the metal plates positioned in the packaging regions to seal an organic light-emitting material therein, such that the organic light-emitting material is insulated from water vapor and oxygen in the ambient environment, thereby ensuring long-term reliable operation of the AMOLED display screen.

Description

Active matrix organic light emitting diode display screen, packaging method thereof and terminal device

This application claims priority to Chinese Patent Application No. 201610554221.2, entitled "Active Matrix Organic Light Emitting Diode Display, Encapsulation Method and Terminal Equipment", filed on July 14, 2016, The entire contents of this application are incorporated herein by reference.

Technical field

The present application relates to the field of display panel packaging technologies, and in particular, to an active matrix organic light emitting diode display screen and a packaging method thereof, and a terminal device including the active matrix organic light emitting diode display screen.

Background technique

An organic electroluminescent device is a novel light source following an inorganic semiconductor light emitting diode.

Since the environmental stability of the organic material is inferior to that of the inorganic material, the organic photoelectric material used in the active-matrix organic light emitting diode (AMOLED) device is suitable for the water vapor in the surrounding environment. Oxygen is very sensitive, even when exposed to a very small amount (10 ^-6 g / m ² /day) of water vapor or oxygen, it will cause the performance of AMOLED devices to degrade, affecting the luminescence properties of AMOLED devices. Therefore, in order to ensure long-term reliable operation of the AMOLED device, it is required to be tightly packaged in the AMOLED device packaging process in order to isolate the organic photoelectric material in the AMOLED device from moisture and oxygen in the surrounding environment.

Summary of the invention

To solve the above technical problem, the present application provides an AMOLED display screen and a packaging method thereof, and a terminal device including the AMOLED display screen to seal the organic light emitting material in the AMOLED display screen to The water vapor and oxygen in the surrounding environment are isolated to ensure long-term reliable operation of the AMOLED display.

To solve the above problem, the present application provides the following technical solutions:

In a first aspect, the present application provides a method for packaging an AMOLED display panel, the package method comprising:

Coating a metal salt solution on the package region on the first surface of the array substrate and the package region on the first surface of the package substrate, the metal salt solution including a solvent, a metal salt, a complexing agent and a reducing agent, and the array substrate The first surface is opposite to the first surface of the package substrate;

Heating a package region of the array substrate coated with the metal salt solution such that a package region of the array substrate is covered with metal nanoparticles, and, for the coating of the metal salt solution The package region of the package substrate is subjected to heat treatment such that the package region of the package substrate is covered by the metal nanoparticles;

Metal nanoparticles on the surface of the array substrate and metal nanoparticles on the surface of the package substrate are crimped to form a metal nanoparticle layer including the array substrate, the package substrate, and the array substrate and the package substrate a sandwich structure, a projection of the package region of the package substrate on a first surface of the array substrate coincides with a package region of the array substrate;

Heating the sandwich structure to fuse the metal nanoparticle layer to form a metal plate, and at least one metal atom located on the first surface of the metal plate and at least one atom located in a package region of the package substrate Place The same ligand is bonded in the complexing agent, or at least one metal atom located on the first surface of the metal plate and at least one atom located in the package region of the array substrate are the same as the complexing agent. The body phase is bonded to obtain the AMOLED display panel; wherein the first surface of the metal plate is opposite to the second surface of the metal plate.

In combination with the first aspect, in a first possible implementation, the metal salt is a metal acetate or citrate.

Specifically, the metal includes gold, silver, copper or aluminum.

In combination with the first aspect or the first possible implementation of the first aspect, in a second possible implementation, the solvent is an alcohol.

Specifically, the alcohol substance includes: alcohol, propanol or butanol.

In combination with the first aspect or the first possible implementation of the first aspect, in a third possible implementation, the reducing agent is a polyol compound or an amine compound.

Specifically, the reducing agent comprises: monoethanolamine, diethanolamine or triethanolamine.

In combination with the first aspect or any one of the above possible implementations of the first aspect, in a fourth possible implementation, the complexing agent is an amine or a fatty acid.

In combination with the first aspect or the first possible implementation of the first aspect, in the fifth possible implementation, the metal salt solution further comprises a stabilizer.

Specifically, the stabilizer is oleic acid.

With reference to the first aspect, or any one of the foregoing possible implementation manners of the first aspect, in a sixth possible implementation, the method for manufacturing the metal salt solution comprises:

The solvent, metal salt, reducing agent, and complexing agent are mixed at a predetermined mass ratio to form a clear, clear metal salt solution.

Specifically, the solvent, the metal salt, the reducing agent and the complexing agent are mixed according to a preset mass ratio to form a transparent, clear metal salt solution comprising:

Silver acetate, diethanolamine and n-butanol are mixed in a predetermined mass ratio to form a clear, clear metal salt solution.

Optionally, the preset mass ratio is (0.8-1.5): (1.5-2): (5-10).

In conjunction with the sixth possible implementation of the first aspect, in a seventh possible implementation, the method for fabricating the metal salt solution further comprises: adding a stabilizer to the transparent clear solution.

Specifically, the stabilizer is oleic acid.

Optionally, the mass ratio of the silver acetate, the diethanolamine, the n-butanol, and the oleic acid is: (0.8-1.5): (1.5-2): (5-10): (0.05-0.2 ).

In a second aspect, the present application provides an AMOLED display panel, including:

An array substrate, a package substrate, and a metal plate, the metal plate being located between the array substrate and the package substrate;

The first surface of the package substrate is opposite to the first surface of the array substrate, the first surface of the package substrate and the first surface of the array substrate both include a package area, and the package area of the package substrate is a projection of the first surface of the array substrate coincides with a package area of the array substrate;

At least one metal atom located on the first surface of the metal plate and at least one atom located in the package region of the package substrate are bonded to the same ligand, or at least one metal atom located on the first surface of the metal plate Bonding to at least one atom of the package region of the array substrate with the same ligand, the first surface of the metal plate Opposite the second surface of the metal plate.

In conjunction with the second aspect, in a first possible implementation, the ligand comprises a nitrogen atom or a sulfur atom having a free electron pair.

In combination with the second aspect or the first possible implementation of the second aspect, in a second possible implementation, the pore size of the pores in the metal plate is less than or equal to 10 nm.

With reference to the second aspect or the foregoing possible implementation manner of the second aspect, in a third possible implementation, the first surface of the array substrate further includes a region where the organic electroluminescent device is placed, the array substrate a package region surrounding the region where the organic electroluminescent device is placed, and a distance between an inner edge of the package region of the array substrate and an outer edge of the region where the organic electroluminescent device is placed is greater than or equal to 0.1 mm And less than or equal to 0.3mm.

In combination with the second aspect or the second possible implementation of the second aspect, in a fourth possible implementation, the thickness of the metal plate is greater than or equal to 1 μm and less than or equal to 10 μm.

With reference to the second aspect or the second aspect, the fifth possible implementation manner, in the fifth possible implementation, the metal plate comprises: a gold atom, a silver atom, a copper atom or an aluminum atom.

In a third aspect, the present application provides a terminal device, including: a display screen and a power supply provided in any of the above possible implementation manners, wherein the power supply is used to provide a power signal to an organic electroluminescent device in the display screen. And for causing the organic electroluminescent device to generate visible light to form an image.

Compared with the prior art, the above technical solution has the following advantages:

In the AMOLED display screen and the packaging method thereof, the first surface of the package substrate is opposite to the first surface of the array substrate, and the first surface of the package substrate and the first surface of the array substrate Each includes a package area, and a projection of the package area of the package substrate on a first surface of the array substrate coincides with a package area of the array substrate; at least one metal atom located at a first surface of the metal board At least one atom of the package region of the package substrate is bonded to the same ligand, or at least one metal atom located on the first surface of the metal plate and at least one atom located in the package region of the array substrate The same ligand phase is bonded, and the first surface of the metal plate is opposite to the second surface of the metal plate. It can be seen that the AMOLED display panel encapsulated by the encapsulation method provided by the present application can seal the organic luminescent material in the AMOLED display panel with the metal plate located in the package area to make it and the surrounding water vapor. It is isolated from oxygen to ensure long-term reliable operation of the AMOLED display.

DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present application, and other drawings can be obtained according to the drawings without any creative work for those skilled in the art.

FIG. 1 is a flowchart of a method for packaging an AMOLED display screen according to an embodiment of the present application;

FIG. 2 is a partial schematic structural diagram of an AMOLED display panel packaging method according to an embodiment of the present application; FIG.

FIG. 6 is a schematic structural diagram of an AMOLED display screen according to an embodiment of the present application.

detailed description

As described in the background section, in order to ensure long-term reliable operation of the AMOLED device, it is required to be tightly packaged in the AMOLED device packaging process in order to isolate the organic photoelectric material in the AMOLED device from moisture and oxygen in the surrounding environment.

In view of this, the embodiment of the present application provides a method for packaging an AMOLED display screen, and the packaging method includes:

Heating the sandwich structure to fuse the metal nanoparticle layer to form a metal plate, and at least one metal atom located on the first surface of the metal plate and at least one atom located in a package region of the package substrate The same ligand is bonded to the ligand, or at least one metal atom located on the first surface of the metal plate and at least one atom located in the package region of the array substrate are the same as the complexing agent The ligand phase is bonded to obtain the AMOLED display panel; wherein the first surface of the metal plate is opposite to the second surface of the metal plate.

Correspondingly, the embodiment of the present application further provides an AMOLED display screen and a terminal device including the AMOLED display screen, where the AMOLED display screen includes:

At least one metal atom located on the first surface of the metal plate and at least one atom located in the package region of the package substrate are bonded to the same ligand, or at least one metal atom located on the first surface of the metal plate At least one atom located in a package region of the array substrate is bonded to the same ligand, and a first surface of the metal plate is opposite to a second surface of the metal plate.

It can be seen that the AMOLED display panel and the packaging method thereof provided by the embodiments of the present invention can seal the organic luminescent material in the AMOLED display panel with a metal plate located in the package area to make it and the surrounding environment Water vapor and oxygen are isolated to ensure long-term reliable operation of AMOLED devices.

Moreover, in the AMOLED device packaging method provided by the embodiment of the present application, the metal salt solution contains a complexing agent, which can increase the solubility of the metal salt in the solvent, so that the metal salt solution does not There is a solid particle which does not precipitate under the action of gravity, so that it can be stably applied for a long time after being uniformly coated on the package substrate surface of the array substrate and the package substrate, thereby uniformly covering the subsequently formed metal nanoparticles. Narrative a column substrate and a package region of the package substrate.

The technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments. In the following description, numerous specific details are set forth in order to facilitate a full understanding of the application, but the invention may be practiced in other ways than those described herein, and those skilled in the art can do without departing from the scope of the application. The invention is not limited by the specific embodiments disclosed below.

The embodiment of the present application provides a method for packaging an AMOLED display screen. As shown in FIG. 1 , the packaging method includes:

S1: as shown in FIG. 2, a metal salt solution 30 is coated on the package area A on the first surface of the array substrate 10 and the package area B on the first surface of the package substrate 20, respectively. The metal salt solution 30 includes a solvent and a metal. A first surface of the array substrate 10 is opposite to a first surface of the package substrate 20, a salt, a complexing agent, and a reducing agent.

It should be noted that, in the embodiment of the present application, the first surface of the array substrate 10 further includes a region C in which the organic electroluminescent device is placed, and the package region A of the array substrate 10 surrounds the organic electro-electrode Region C of the light emitting device. Optionally, a distance d between an inner edge of the package area A of the array substrate 10 and an outer edge of the area C where the organic electroluminescent device is placed is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

On the basis of the above embodiments, in one embodiment of the present application, the metal salt in the metal salt solution 30 includes metal ions which are easily reduced to metal atoms, so that the metal salt can be reduced under specific conditions. The agent is reduced to a metal atom. Specifically, in one embodiment of the present application, the solvent is an alcohol; the metal salt is a metal acetate or citrate; and the reducing agent is a polyol compound or an amine compound. However, the present application does not limit this as long as it is ensured that the metal ions in the metal salt can be reduced to metal atoms by the reducing agent in the metal salt solution 30 under specific conditions.

Optionally, in the above embodiment, the alcohol substance comprises: alcohol, propanol or butanol; the metal comprises: gold, silver, copper or aluminum; and the reducing agent comprises: monoethanolamine, diethanolamine or Triethanolamine.

It should be noted that when the solvent is an organic solvent, the solubility of the metal salt in the solvent is small, in order to increase the solubility of the metal salt in the solvent to form a transparent, clear metal. a salt solution, in the embodiment of the present application, the metal salt solution further includes a complexing agent to adhere to the surface of the metal salt by using the complexing agent, and increasing the metal salt in the solvent Solubility. Optionally, the complexing agent is an organic complexing agent.

On the basis of the above embodiments, in one embodiment of the present application, the method for preparing the metal salt solution comprises: mixing a solvent, a metal salt, a reducing agent and a complexing agent according to a preset mass ratio to form a transparent and clarified Metal salt solution. Specifically, the solvent, the metal salt, the reducing agent and the complexing agent are mixed according to a preset mass ratio, and the transparent, clear metal salt solution comprises: mixing silver acetate, diethanolamine and n-butanol according to a preset mass ratio. A clear, clear metal salt solution is formed. It should be noted that, in the examples of the present application, the diethanolamine serves as both a reducing agent and a complexing agent.

Optionally, the preset mass ratio is (0.8-1.5): (1.5-2): (5-10).

Based on the above embodiment, in one embodiment of the present application, the method for preparing the metal salt solution further comprises: adding a stabilizer to the transparent clear solution to form a transparent, clear, stable metal salt solution. .

Optionally, based on the above embodiment, in a specific embodiment of the present application, the stabilizer is oleic acid, the silver acetate, the diethanolamine, the n-butanol, and the oleic acid. The mass ratio is: (0.8-1.5): (1.5-2): (5-10): (0.05-0.2). However, this application does not limit this, as the case may be.

Since the metal salt solution contains a complexing agent, the solubility of the metal salt in the solvent can be increased, so that no solid particles are present in the metal salt solution, and precipitation does not occur under the action of gravity. Therefore, it can be stably stabilized for a long time after being uniformly coated on the surface of the array substrate 10 and the package substrate 20, so that the subsequently formed metal nanoparticles uniformly cover the package regions of the array substrate 10 and the package substrate 20.

S2: heat-treating the package region A of the array substrate 10 coated with the metal salt solution 30 so that the package region A of the array substrate 10 is covered by the metal nanoparticles 40, as shown in FIG. And, the package region B of the package substrate 20 coated with the metal salt solution 30 is subjected to heat treatment so that the package region B of the package substrate 20 is covered with the metal nanoparticles 40.

Specifically, the package region A of the array substrate 10 coated with the metal salt solution 30 is subjected to heat treatment, and the metal ions in the metal salt are reduced to metal by using a reducing agent in the metal salt solution 30. Atom, metal nanoparticles are formed in the package region A of the array substrate 10. It should be noted that as the heating progresses, the metal ions in the metal salt are gradually reduced to metal atoms, and gradually grow in the package region A of the first surface of the array substrate 10 until the metal salt The metal ions in the metal ions are all reduced, so that the package region A of the first surface of the array substrate 10 is covered by the metal nanoparticles.

Similarly, when the package region B of the package substrate 20 coated with the metal salt solution 30 is subjected to heat treatment, the metal ions in the metal salt are also utilized by the reducing agent in the metal salt solution 30. The metal atoms are reduced until the metal ions in the metal salt are all reduced, so that the package region B of the first surface of the package substrate 20 is covered by the metal nanoparticles 40.

S3: as shown in FIG. 4, the metal nanoparticles 40 on the first surface of the array substrate 10 and the metal nanoparticles 40 on the first surface of the package substrate 20 are crimped to form the array substrate 10 and the package substrate 20 And a sandwich structure of the metal nanoparticle layer 50 between the array substrate 10 and the package substrate 20, a projection of the package region B of the package substrate 20 on the first surface of the array substrate 10 and the array The package areas A of the substrate 10 are coincident.

S4: heating the sandwich structure to heat the metal nanoparticle layer 50 to form a metal plate 60, and at least one metal atom located on the first surface of the metal plate 60 is located in the At least one atom of the package region of the package substrate 20 is bonded to the same ligand in the complexing agent, or at least one metal atom located on the first surface of the metal plate 60 and the package located on the array substrate 10 At least one atom of the region is bonded to the same ligand in the complexing agent to obtain the AMOLED display screen; wherein the first surface of the metal plate is opposite to the second surface of the metal plate.

Optionally, the array substrate 10 is a glass substrate, and the package substrate 20 is also a glass substrate. However, the present application is not limited thereto. In other embodiments of the present application, the array substrate 10 and the The package substrate 20 may also be a substrate of other materials such as a plastic substrate, which is not limited in this application, as long as the array substrate 10 and the package substrate 20 are flat substrates, and the package substrate 20 is a transparent substrate. The metal plate 60 may have good adhesion to the array substrate 10 and the package substrate 20.

It should be noted that, in the embodiment of the present application, the complexing agent contains a ligand, and the ligand can promote the coordination connection between the metal atoms in the metal plate 60 and the silicon atoms in the array substrate 10. That is located on the metal plate 60 At least one metal atom of a surface and at least one atom of the encapsulation region of the array substrate 10 are bonded to the same ligand in the complexing agent to enhance adhesion between the metal plate 60 and the array substrate 10. Similarly, the complexing agent can also promote the coordination connection of the metal atoms in the metal plate 60 with the silicon atoms in the package substrate 20, that is, at least one metal atom located at the first surface of the metal plate 60 At least one atom of the package region of the array substrate 10 is bonded to the same ligand in the complexing agent to enhance adhesion between the metal plate 60 and the package substrate 20.

It should be noted that, since the steric hindrance of the amino group is the smallest, and the lone electron of the nitrogen atom is dispersed to the smallest extent, the coordination ability is the strongest. Therefore, in an alternative embodiment of the present application, the complexing agent is an amine. Or fatty acids. Specifically, the complexing agent may be monoethanolamine, diethanolamine or triethanolamine.

Optionally, in one embodiment of the present application, at least one metal atom located on the first surface of the metal plate 60 and at least one atom located in the package region of the package substrate 20 are the same as the same in the complexing agent. The bulk phase is bonded, and at least one metal atom located on the second surface of the metal plate 60 and at least one atom located in the package region of the array substrate 10 are bonded to the same ligand in the complexing agent, thereby further Obtaining the AMOLED display panel to simultaneously enhance the robustness between the array substrate 10 and the metal plate 60 and the firmness between the package substrate 20 and the metal plate 60, thereby enhancing the AMOLED display In the screen, the fixing between the array substrate 10 and the package substrate 20 improves the packaging effect of the AMOLED display.

It should be noted that, in the embodiment of the present application, since the metal nanoparticles in the metal nanoparticle layer 50 are on a nanometer scale, the melting point of the metal nanoparticles is low, which greatly reduces the sandwich structure. The process temperature at which the metal nanoparticle layer 50 is welded to form a metal plate 60 is heated. Moreover, since the material of the metal is soft, in the packaging method provided by the embodiment of the present application, the metal plate is used as the package structure, the internal stress can be alleviated to some extent, and the AMOLED display packaging process is avoided. The stress is too large, which leads to the failure of the package, so that the water vapor and oxygen in the surrounding environment enter the inside of the AMOLED display, so that the performance of the AMOLED display is rapidly deteriorated.

Specifically, in the embodiment of the present application, in the embodiment of the present application, the sandwich structure is heated by a laser to fuse the metal nanoparticle layer 50 to form a metal plate 60, but The application is not limited thereto. In other embodiments of the present application, the sandwich structure may be heated to weld the metal nanoparticle layer 50 to form a metal plate 60, as the case may be. set.

It can be seen from the above that the AMOLED display panel packaged by the encapsulation method provided by the embodiment of the present application can be used in the AMOLED display panel by using the metal plate 60 located in the package area of the array substrate 10 and the package substrate 20. The organic luminescent material is sealed to isolate it from moisture and oxygen in the surrounding environment to ensure long-term reliable operation of the AMOLED display.

Moreover, the temperature at which the organic light-emitting material in the array substrate 10 can withstand is generally lower than 100 ° C. When the temperature is too high, the organic light-emitting material is destroyed and decomposed, which affects the light-emitting performance of the AMOLED display screen. In order to ensure that the organic light-emitting material in the array substrate 10 is not broken and destroyed during the fusion of the metal nano-particle layer 50 into the metal plate 60, the metal nano-particle layer 50 and the organic light-emitting material need to be kept constant. The safety distance is such that when the temperature at which the metal nanoparticle layer 50 is melted is spread to the organic light-emitting material region, the temperature range to which the organic light-emitting material can withstand can be reduced. Therefore, in the packaging method provided by the embodiments of the present application, the metal nano-particle layer The process temperature of the 50-fused metal plate 60 is low, which not only reduces the process difficulty, but also reduces the metal plate. The safety distance between the 60 and the organic luminescent material is adapted to the development trend of the narrow frame of the AMOLED device.

Correspondingly, the embodiment of the present application further provides an AMOLED display screen. Unlike a conventional inorganic semiconductor light-emitting diode, the organic electroluminescent device uses an organic thin film material as a light-emitting material, and chemically synthesizes different organic materials to obtain different colors. The light-emitting device belongs to a surface-emitting device, which can realize large-area uniform illumination without using any additional components, and has the characteristics of being thin and flexible, and can be applied to many fields such as military, medical, engineering, entertainment, and education. It has become a hot spot in the research of lighting display technology in the world. The organic electroluminescent device is usually fabricated on a substrate such as glass, plastic sheet or steel sheet, and includes an anode, a cathode, and two or more organic materials between the anode and the cathode, wherein at least one of the anode and the cathode is permeable. Visible light, such that when a voltage is applied across the anode and cathode, the holes in the anode and the electrons in the cathode can be injected into the organic material to recombine to produce photons that emit visible light.

Specifically, as shown in FIG. 6 , the AMOLED display panel provided by the embodiment of the present application includes: an array substrate 10 , a package substrate 20 , and a metal plate 60 . The metal plate 60 is located on the array substrate 10 and the package substrate 20 . between;

The first surface of the package substrate 20 is opposite to the first surface of the array substrate 10, and the first surface of the package substrate 20 and the first surface of the array substrate 10 both include a package area, and the package substrate The projection of the package area B of 20 on the first surface of the array substrate 10 coincides with the package area A of the array substrate 10;

At least one metal atom located on the first surface of the metal plate 60 and at least one atom located in the package region of the package substrate 20 are bonded to the same ligand, or at least on the first surface of the metal plate 60. A metal atom is bonded to the same ligand to at least one atom of the package region of the array substrate 10, and the first surface of the metal plate 60 is opposed to the second surface of the metal plate 60.

It should be noted that, since the steric hindrance of the amino group is the smallest, and the lone electron of the nitrogen atom is dispersed to a minimum, and the coordination ability is the strongest, in an alternative embodiment of the present application, the ligand includes the vacant electron. The nitrogen atom of the pair, in other embodiments of the present application, the ligand may further include a sulfur atom having a free electron pair, which is not limited in the application as long as the ligand includes a pair of free electrons. An atom, a molecule or an ion can be used.

On the basis of any of the above embodiments, in one embodiment of the present application, the first surface of the array substrate 10 further includes a region C in which the organic electroluminescent device 70 is placed, and a package region A of the array substrate 10 A region C in which the organic electroluminescent device 70 is placed is surrounded. Optionally, a distance d between an inner edge of the package area A of the array substrate 10 and an outer edge of the area C where the organic electroluminescent device 70 is placed is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

On the basis of the above embodiments, in one embodiment of the present application, the aperture of the metal plate 60 has a hole diameter of less than or equal to 10 nm to isolate the water vapor and oxygen in the environment around the AMOLED display screen, thereby avoiding the The water vapor and oxygen in the environment around the AMOLED display enter the area where the organic electroluminescent device is placed, ensuring long-term reliable operation of the AMOLED display.

On the basis of any of the above embodiments, in an optional embodiment of the present application, the thickness of the metal plate 60 is greater than or equal to 1 μm and less than or equal to 10 μm to ensure the packaging effect of the metal plate 60 is reduced. The thickness of the metal plate 60 is small, and the development of the thinness and thinness of the AMOLED display screen is adapted.

Based on any of the above embodiments, in a specific embodiment of the present application, the metal plate 60 includes: a gold atom, a silver atom, a copper atom or an aluminum atom. However, this application does not limit this. In other embodiments of the present application, The metal plate 60 may also include other metal atoms, as the case may be.

It should be noted that since the metal atoms in the metal plate 60 are on a nanometer scale, the melting point thereof is low, and the process temperature at the time of fabrication of the metal plate 60 is greatly reduced. In addition, the material of the metal is soft. The AMOLED display provided by the embodiment of the present invention can use the metal plate as the package structure to alleviate the internal stress to a certain extent, and avoid the internal stress being excessive during the packaging process of the AMOLED display. As a result, the package fails, so that the water vapor and oxygen in the surrounding environment enter the inside of the AMOLED display screen, so that the AMOLED display performance is rapidly deteriorated.

Optionally, based on any of the foregoing embodiments, in one embodiment of the present application, at least one metal atom located on the first surface of the metal plate 60 and at least one atom located in the package area of the package substrate 20 All of which are bonded to the same ligand in the complexing agent, and at least one metal atom located on the second surface of the metal plate 60 and at least one atom located in the package region of the array substrate 10 are coordinated with the coordination The same ligand is bonded in the agent to obtain the AMOLED display panel to simultaneously enhance the adhesion between the array substrate 10 and the metal plate 60 and between the package substrate 20 and the metal plate 60. The fastness of the AMOLED display screen enhances the fixing between the array substrate 10 and the package substrate 20 to improve the packaging effect of the AMOLED display panel.

In addition, the embodiment of the present application further provides a terminal device, where the terminal device includes: a display screen and a power source, wherein the power source is used to provide a power signal to the organic electroluminescent device in the display screen, for The organic electroluminescent device is caused to generate visible light to form an image; the display screen is an AMOLED display screen provided by any of the above embodiments of the present application.

In summary, the AMOLED display panel and the terminal device including the AMOLED display panel of the present application can display the AMOLED by using the metal plate 60 located in the package area of the array substrate 10 and the package substrate 20. The organic electroluminescent device in the screen is sealed to isolate it from moisture and oxygen in the surrounding environment, ensuring long-term reliable operation of the AMOLED display.

Each part of this manual is described in a progressive manner. Each part focuses on the differences from other parts. The same similar parts between the parts can be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to make or use the application. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the application is not limited to the embodiments shown herein, but the broadest scope consistent with the principles and novel features disclosed herein.

Claims

A method for packaging an active matrix organic light emitting diode AMOLED display screen, characterized in that the packaging method comprises:

Coating a metal salt solution on the package region on the first surface of the array substrate and the package region on the first surface of the package substrate, the metal salt solution including a solvent, a metal salt, a complexing agent and a reducing agent, and the array substrate The first surface is opposite to the first surface of the package substrate;

Heating a package region of the array substrate coated with the metal salt solution such that a package region of the array substrate is covered with metal nanoparticles, and, for the coating of the metal salt solution The package region of the package substrate is subjected to heat treatment such that the package region of the package substrate is covered by the metal nanoparticles;

Metal nanoparticles on the surface of the array substrate and metal nanoparticles on the surface of the package substrate are crimped to form a metal nanoparticle layer including the array substrate, the package substrate, and the array substrate and the package substrate a sandwich structure, a projection of the package region of the package substrate on a first surface of the array substrate coincides with a package region of the array substrate;

Heating the sandwich structure to fuse the metal nanoparticle layer to form a metal plate, and at least one metal atom located on the first surface of the metal plate and at least one atom located in a package region of the package substrate The same ligand is bonded to the ligand, or at least one metal atom located on the first surface of the metal plate and at least one atom located in the package region of the array substrate are the same as the complexing agent The ligand phase is bonded to obtain the AMOLED display panel; wherein the first surface of the metal plate is opposite to the second surface of the metal plate.
The encapsulation method according to claim 1, wherein the metal salt is a metal acetate or citrate.
The encapsulation method according to claim 1 or 2, wherein the solvent is an alcohol.
The encapsulation method according to any one of claims 1 to 3, wherein the reducing agent is a polyol compound or an amine compound.
The encapsulation method according to any one of claims 1 to 4, wherein the complexing agent is an amine or a fatty acid.
An active matrix organic light emitting diode AMOLED display screen, comprising: an array substrate, a package substrate and a metal plate, wherein the metal plate is located between the array substrate and the package substrate;

The first surface of the package substrate is opposite to the first surface of the array substrate, the first surface of the package substrate and the first surface of the array substrate both include a package area, and the package area of the package substrate is a projection of the first surface of the array substrate coincides with a package area of the array substrate;

At least one metal atom located on the first surface of the metal plate and at least one atom located in the package region of the package substrate are bonded to the same ligand, or at least one metal atom located on the first surface of the metal plate At least one atom located in a package region of the array substrate is bonded to the same ligand, and a first surface of the metal plate is opposite to a second surface of the metal plate.
The display screen according to claim 6, wherein said ligand comprises a nitrogen atom or a sulfur atom having a vacant electron pair.
The display screen according to claim 6 or 7, wherein the aperture of the metal plate has a pore diameter smaller than or Equal to 10nm.
The display screen according to any one of claims 6 to 8, wherein the first surface of the array substrate further comprises a region where the organic electroluminescent device is placed, and the package region of the array substrate surrounds the placement A region of the organic electroluminescent device, and a distance between an inner edge of the package region of the array substrate and an outer edge of the region where the organic electroluminescent device is placed is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.
The display screen according to any one of claims 6 to 9, characterized in that the thickness of the metal plate is greater than or equal to 1 μm and less than or equal to 10 μm.
The display screen according to any one of claims 6 to 10, characterized in that the metal plate comprises: a gold atom, a silver atom, a copper atom or an aluminum atom.
A terminal device comprising the display screen and the power source according to any one of claims 6 to 11, the power source for supplying a power signal to the organic electroluminescent device in the display screen for causing the Electroluminescent devices produce visible light to form an image.