CN113097411A - Display panel and preparation method thereof - Google Patents
Display panel and preparation method thereof Download PDFInfo
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- CN113097411A CN113097411A CN202110303452.7A CN202110303452A CN113097411A CN 113097411 A CN113097411 A CN 113097411A CN 202110303452 A CN202110303452 A CN 202110303452A CN 113097411 A CN113097411 A CN 113097411A
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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
- H10K50/846—Passivation; Containers; Encapsulations comprising getter material or desiccants
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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
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking layers
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- 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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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Abstract
The invention provides a display panel and a preparation method thereof. When external steam got into in the panel, the moisture absorption layer can adsorb steam in order to guarantee its sealing performance effectively, and simultaneously, the moisture absorption layer sets up the non-luminous region at display panel, can not influence display panel's normal demonstration, when preparing this display panel, directly with moisture absorption layer rendition to black matrix layer through the transfer roller technology on, preparation simple process, the cost is lower to display panel's reliability has been improved.
Description
The invention relates to the field of display panel manufacturing, in particular to a display panel and a preparation method of the display panel.
Background
With the continuous improvement of display panel manufacturing technology, higher requirements are put on the performance and quality of display panels.
A commonly used organic light-emitting diode (OLED) display device mainly includes a bottom emission type and a top emission type. Compared with a bottom-emitting OLED device, the top-emitting OLED device has the advantages of lower working voltage, longer service life and lower power consumption under the same brightness. Therefore, the top emission type OLED display device is widely used. For top-emitting OLEDs, a reactive metal is typically used as a cathode in the existing fabrication process. The cathode and other internal devices are susceptible to oxygen and moisture, and once water and oxygen enter the device, the service life of the device is severely limited, and defects such as dark spots occur. In order to reduce the problem that the inside of the display device is easy to corrode and seal, in the prior art, a circle of water absorbing material is generally manufactured in a peripheral non-light emitting area of an OLED device, and the water absorbing material absorbs the invasion of outside environment water vapor so as to achieve the effect of improving the sealing effect. However, due to the development trend of narrow frame of the panel, the peripheral non-light-emitting area is compressed continuously, and the width of the peripheral moisture absorbent frame is also compressed continuously, so that the function of the moisture absorbent is reduced continuously, and finally the sealing effect of the OLED device is not ideal.
In summary, in the conventional manufacturing process and sealing process of the display device, after the display device is used for a long time, substances such as external moisture are likely to intrude into the display device, which may cause the sealing failure of the display device and affect the display quality of the display device. The above technical problems need to be improved.
Disclosure of Invention
The embodiment of the invention provides a display panel and a preparation method of the display panel, which are used for effectively improving the sealing performance of the display panel, preventing external substances such as water vapor from entering the panel, simplifying the preparation process and improving the reliability and comprehensive performance of a display device.
In order to solve the above technical problem, the technical method provided by the embodiment of the present invention is as follows:
in a first aspect of the embodiments of the present invention, there is provided a display panel including pixel light-emitting areas and pixel non-light-emitting areas disposed between two adjacent pixel light-emitting areas, the display panel including:
the liquid crystal display panel comprises a first substrate, a second substrate arranged opposite to the first substrate, and a black matrix layer and a moisture absorption layer which are arranged between the first substrate and the second substrate;
the moisture absorption layer is arranged on the second substrate, the black matrix layer is arranged on one side, facing the second substrate, of the first substrate, and the moisture absorption layer and the black matrix layer are correspondingly arranged in the pixel non-luminous area.
According to an embodiment of the present invention, the material of the moisture absorption layer includes at least one of moisture absorption particles, a solvent and a dispersant, and the viscosity of the moisture absorption layer is less than 50000Mpa · s.
According to an embodiment of the invention, the hygroscopic particles comprise nanoparticles comprising at least one of a group IIA metal and an oxide of a group IIA metal.
According to an embodiment of the present invention, the thickness of the black matrix layer is less than 10um, and a taper angle of the black matrix layer with respect to the surface of the first substrate is greater than 30 °.
According to an embodiment of the present invention, the second substrate includes:
an array substrate;
the pixel defining layer is arranged on the array substrate and is arranged in a position corresponding to the pixel non-luminous area;
a light emitting layer disposed on the array substrate and covering the pixel defining layer;
a cathode layer disposed on the light emitting layer; and the number of the first and second groups,
a composite barrier layer disposed on the cathode layer.
According to an embodiment of the present invention, the composite barrier layer includes an organic layer and an inorganic layer, and the organic layer and the inorganic layer are alternately disposed.
According to a second aspect of the present invention, there is also provided a method for manufacturing a display panel, comprising the steps of:
s100: providing a first substrate, and arranging a black matrix layer on the first substrate;
s101: providing a transfer roller, and preparing a transfer film layer on the transfer roller, wherein the transfer film layer comprises a moisture absorbent;
s102: patternwise transferring the transfer film layer onto the black matrix layer, and forming a moisture absorption layer on the black matrix layer;
s103: providing a second substrate, arranging a pixel definition layer on the second substrate, and arranging an anode layer, a light-emitting layer and a cathode layer on the second substrate in sequence;
s104: and preparing a composite barrier layer on the cathode layer, and bonding the composite barrier layer with the moisture absorption layer to obtain the display panel.
According to an embodiment of the present invention, in the step S100, the black matrix layer is disposed in the pixel non-emitting area of the display panel.
According to an embodiment of the present invention, in the step S102, during the transfer of the transfer film layer, the pressure of the transfer roller is controlled so that the deformation amount of the transfer film layer during the transfer is less than 10%.
According to an embodiment of the present invention, in the step S104, when the composite barrier layer is prepared, a composite film layer in which an inorganic water-blocking layer and an organic buffer layer are sequentially overlapped is disposed.
In summary, the embodiments of the present invention have the following beneficial effects:
the embodiment of the invention provides a display panel and a preparation method of the display panel, wherein a moisture absorption layer is arranged on a black matrix layer in the display panel, the black matrix layer and the moisture absorption layer are both arranged in corresponding non-light-emitting area positions in a display area of the display panel, and when external substances such as water vapor and the like invade into the display panel, moisture absorption agents in the moisture absorption layer can effectively absorb the substances such as water vapor and the like, so that the display panel is effectively sealed and protected. Furthermore, when the display panel is prepared, the moisture absorbent layer is directly transferred to the black matrix layer of the display panel through the transfer roller, the preparation process is simple, the preparation process flow of the display panel is effectively simplified, the preparation cost is reduced, and the reliability and the display quality of the display panel are improved.
Drawings
The technical solution and other advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a flow chart of a manufacturing process of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a transfer process provided in an embodiment of the present invention;
fig. 4 is a schematic view of a film structure of a second substrate according to an embodiment of the invention;
fig. 5 is a top view of a display panel according to an embodiment of the invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
With the continuous development of display panel preparation technology, people put forward higher requirements on the reliability and the display performance of a display device, the invention provides a display panel and a preparation method of the display panel, the display panel has good sealing performance, and the preparation process of the display panel is simple, low in cost and high in reliability.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention. The display panel includes a first substrate 11 and a second substrate 10, wherein the first substrate 11 and the second substrate 10 are oppositely disposed.
Specifically, the display area of the display panel includes a plurality of pixel light-emitting areas 108 and pixel non-light-emitting areas 109, the pixel light-emitting areas 108 and the pixel non-light-emitting areas 109 are disposed adjacent to each other, and when the display panel performs light-emitting display, light is emitted from corresponding areas in the pixel light-emitting areas 108.
The second substrate 10 provided in the embodiment of the invention includes an array substrate 100, a pixel defining layer 101, an anode layer 102, a light emitting layer 103, a cathode layer 104, and a composite blocking layer 105.
Specifically, the pixel defining layer 101 is disposed on the array substrate 100 of the display panel, the pixel defining layer 101 in the embodiment of the present invention is disposed at a position corresponding to the pixel non-light emitting region 109 of the display panel, when the pixel defining layer 101 is disposed, the pixel defining layer 101 forms a plurality of opening regions on the array substrate 100, the opening regions correspond to the pixel light emitting regions 108, the anode layer 102 is disposed in the opening regions, and the anode layer 102 is disposed on the array substrate 100.
Meanwhile, the light emitting layer 103 is disposed on the pixel defining layer 101, and the light emitting layer 103 covers the anode layer 102 and the pixel defining layer 101, so that the light emitting layer 103 is electrically connected to the anode layer 102 in a region corresponding to the pixel light emitting region 108.
In the embodiment of the present invention, the cathode layer 104 is disposed on the light emitting layer 103, and the composite barrier layer 105 is disposed on the cathode layer 104. Therefore, the light emitting layer 103 is in communication with the anode layer 102 and the cathode layer 104 to form a complete electrode structure, thereby realizing light emission of the light emitting layer 103. When the light emitting layer 103 emits light, light is emitted from the opening area of the pixel defining layer 101 and is emitted from a position corresponding to the pixel light emitting area 108 of the display panel, thereby realizing light emitting display of the display panel.
When the composite barrier layer 105 is disposed, the composite barrier layer 105 may be a composite film structure formed by alternately disposing inorganic layers and organic layers, and when the composite barrier layer is disposed, it is ensured that two outermost films of the composite barrier layer 105 are inorganic layers, so as to ensure the sealing performance of the display panel.
Preferably, the composite barrier layer 105 may also be formed by overlapping a plurality of water blocking layers and buffer layers, wherein each of the water blocking layers and the buffer layers may be formed by a plurality of sub-layers, and preferably, the water blocking layers may be formed by silicon oxide layers or silicon oxide and silicon nitride layers formed by different processes. The water-blocking layer can also adopt a high-density material which is a material with close enough atomic distance, so that the diffusion of substances such as water, oxygen and the like can be effectively blocked. Preferably, the water-blocking layer can be selected from metal oxides, metal nitrides, metal carbides and metal oxynitrides, as well as silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, indium tin oxide, zinc indium tin oxide, and the like. The buffer layer can adopt organic polymer, and can also be some inorganic layer with polymer-like property, and its organic polymer can be selected from polyester, cycloolefine and polyacrylate, etc. Therefore, when external water vapor invades the interior of the display panel, the composite barrier layer can effectively block the water vapor and other substances so as to ensure various performances of the display panel.
Further, the embodiment of the invention further includes a moisture absorption layer 106, where the moisture absorption layer 106 is disposed on the composite barrier layer 105 and correspondingly disposed in the pixel non-light emitting area 109 of the display panel. Thus, when the light emitting layer 103 of the display panel emits light, the moisture absorption layer 106 does not block the light, thereby effectively ensuring the light emitting rate of the light.
In some embodiments, the material of the moisture absorption layer 106 may be composed of moisture absorption particles, a thermal crosslinking resin, a solvent, a dispersant, and the like, wherein the thermal crosslinking resin may be an oligomer or a monomer, and the moisture absorption particles, the thermal crosslinking resin, the solvent, and the dispersant are mixed according to a certain ratio, so that the mixture solution has a certain fluidity and the viscosity of the mixture solution is less than 50000Mpa · s.
Preferably, the hygroscopic particles in the embodiment of the present invention may be hygroscopic nanoparticles or nanoparticles, and specifically include group IIA metals or group IIA metal oxides, the group IIA metals may be metals such as Ca and Ba, and the group IIA metal oxides may be metal oxides such as CaO and BaO.
Further, the nanoparticles may be nanoparticles having a core-shell structure, wherein the "core" may be nanoparticles of group IIA metals (such as Ca and Ba) and group IIA metal oxides (such as CaO and BaO), and the "shell" is an organic resin, thereby forming a nanoparticle like individual capsule type in which the "shell" surrounds the "core".
When the external moisture and other substances enter the display panel, the nanoparticles in the moisture absorption layer 106 can effectively absorb the moisture, and after the moisture absorption is completed, the transparency of the moisture absorption layer 106 is reduced, however, since the moisture absorption layer 106 in the embodiment of the present invention is disposed in the non-light emitting region of the pixel, the moisture absorption layer 106 does not affect the normal light emission and display of the display panel. Therefore, the moisture absorption layer 106 provided in the embodiment of the invention can not only effectively absorb and block substances such as external moisture, but also does not affect the display performance of the display panel.
Further, the display panel in the embodiment of the present invention further includes a black matrix layer 107 and a color resistance layer 110. Here, the black matrix layer 107 and the color resist layer 110 are both provided on the side of the first substrate 11 close to the second substrate 10 side, the black matrix layer 107 is provided at a position corresponding to the pixel non-light emitting region 109 of the display panel, and the black matrix layer 107 is provided on the side of the first substrate 11 facing the second substrate 10. Meanwhile, the black matrix layer 107 is disposed at a position corresponding to the moisture absorption layer 106. The color resistance layer 110 is disposed in a region of the display panel corresponding to the pixel light emitting region 108.
The light emitted from the light emitting layer 103 in the embodiment of the present invention passes through the pixel light emitting region 108 and passes through the different color resistance layers 110, thereby realizing different colors of light. Specifically, the color resist layer 110 includes a red color resist, a blue color resist, and a green color resist.
When the black matrix layer 107 is arranged, in order to ensure that the black matrix layer can be well bonded with the moisture absorption layer 106 and the overall thickness of the display panel can be well controlled, the thickness of the black matrix layer 107 is smaller than 10um, and the cone angle of the black matrix layer relative to the surface of the first substrate 11 is larger than 30 degrees, so that the display panel can be ensured to have the best performances.
Further, an embodiment of the present invention further provides a method for manufacturing a display panel, as shown in fig. 2, and fig. 2 is a flowchart of a manufacturing process of the display panel according to the embodiment of the present invention. The preparation process of the display panel comprises the following steps:
s100: providing a first substrate, and arranging a black matrix layer on the first substrate;
s101: providing a transfer roller, and preparing a transfer film layer on the transfer roller, wherein the transfer film layer comprises a moisture absorbent;
s102: patternwise transferring the transfer film layer onto the black matrix layer, and forming a moisture absorption layer on the black matrix layer;
as shown in fig. 3, fig. 3 is a schematic flow chart of a transfer process according to an embodiment of the present invention. In order to simplify the manufacturing process of the display panel and to manufacture the display panel with the best performance, in the embodiment of the present invention, a first substrate 11 is provided first, and then a black matrix layer 107 is formed on the first substrate 11, in the embodiment of the present invention, the black matrix layer 107 is disposed in a non-light emitting region of the display panel, and a color resistance layer 110 is disposed in a position corresponding to the light emitting region of the first substrate 11. The light-emitting region and the non-light-emitting region are disposed adjacent to each other.
After the setting, the black matrix layer 107 forms a plurality of protrusions spaced apart from each other on the surface of the first substrate 11, and the heights of the black matrix layer 107 are the same to ensure the performance of the display panel.
Meanwhile, a transfer roller 300 is provided, and the prepared moisture absorption layer material is coated on the transfer roller 300, in the embodiment of the invention, the viscosity of the prepared moisture absorption layer material is less than 50000Mpa & s, and the transfer roller 300 can be rotated at a constant speed during coating, so that the coating uniformity is ensured. After the coating is completed, the transfer roller 300 is left standing for a certain period of time, and finally the film layer 301 to be transferred is formed around the transfer roller. In an embodiment of the present invention, the material of the transfer film layer 301 may include a moisture absorbent, specifically, moisture absorbent nanoparticles, a solvent, a dispersant, and the like.
After the transfer film layer 301 is prepared, the first substrate 11 prepared and formed in step S100 is placed at a corresponding position below the transfer roller 300, and then the transfer roller 300 is rotated forward, during which the transfer roller 300 is ensured to be in contact with and pressed against the black matrix layer 107. During the transfer process, since the transfer film 301 has viscosity, the transfer film 301 is transferred to the surface of the black matrix layer 107 during the contact process with the black matrix layer 107, and a patterned moisture absorption layer 302 is formed on the surface of the black matrix layer 107. The transfer film layer 301 not in contact with the black matrix layer 107 remains on the transfer roller 300.
After the transfer, a moisture absorption layer 302 is formed on all the black matrix layers 107, and preferably, the thickness of the moisture absorption layer 302 may be the same on different black matrix layers 107.
Therefore, in the embodiment of the present invention, in the transfer process of preparing the moisture absorption layer 302, a mask plate is not required to be disposed, and the moisture absorption layer 302 can be directly formed on the black matrix layer 107 according to the plurality of convex black matrix layers 107, so that the preparation process is simpler and the cost is lower.
Preferably, during the process of transferring to form the moisture absorption layer 302, the pressure of the transfer roller 300 is greater than the bonding energy between the transfer film layer 301 and the surface of the transfer roller 300, and the deformation of the transfer film layer 301 is less than 10% during the transfer process, the transfer pressure of the transfer roller 300 is controlled, so that the transfer film layer 301 can be separated from the transfer roller 300 and adhered to the black matrix layer 107, and the deformation of the transfer film layer 301 is less than 10% during the transfer process, so that the transfer film layer 301 can be effectively ensured not to be collapsed during the transfer process and not to be transferred to the light emitting region of the display panel, thereby ensuring the reliability of the prepared display panel.
S103: providing a second substrate, arranging a pixel definition layer on the second substrate, and arranging an anode layer, a light-emitting layer and a cathode layer on the second substrate in sequence;
s104: and preparing a composite barrier layer on the cathode layer, and bonding the composite barrier layer with the moisture absorption layer to obtain the display panel.
As shown in fig. 4, fig. 4 is a schematic view of a film structure of a second substrate according to an embodiment of the present invention. And after the preparation of the step S100-the step S102 is finished, continuously preparing the rest film layers. In the embodiment of the present invention, the anode layer 102 is disposed in a position corresponding to a light emitting region of the display panel, and the anode layer 102 in the opening region is exposed by patterning the pixel defining layer 101, so that the pixel defining layer 101 forms an opening region in the position corresponding to the light emitting region of the display panel, and the anode layer 102 in the opening region is exposed.
Meanwhile, a light emitting layer 103 is disposed on the pixel defining layer 101, and the light emitting layer 103 covers the pixel defining layer 101 and the anode layer 102, wherein the light emitting layer 103 is connected to the anode layer 102 in the light emitting region. And a cathode layer 104 is continuously formed on the light emitting layer 103 so that both sides of the light emitting layer 103 are connected to the anode layer 102 and the cathode layer 104, respectively, to ensure a normal display of the light emitting layer 103.
Further, a composite barrier layer 105 is disposed on the cathode layer 104. The composite barrier layer 105 may be a laminated structure of multiple layers, and the detailed structure of the layers is not described in detail herein.
After the composite barrier layer 105 is disposed, the film layer formed in step S102 is combined with the composite barrier layer 105, specifically, the moisture absorption layer 302 is bonded to the composite barrier layer 105, and the moisture absorption layer 302 is bonded to the position corresponding to the non-display area, so as to finally form a complete display panel.
As shown in fig. 5, fig. 5 is a top view of a display panel according to an embodiment of the present invention. The display panel comprises a cover plate layer 501 and an array substrate 502, the cover plate layer 501 and the array substrate 502 are bonded together to finally form the display panel provided by the embodiment of the invention, the cover plate layer 501 comprises a black matrix layer and a moisture absorption layer provided by the embodiment of the invention, the black matrix layer and the moisture absorption layer are both arranged in a non-luminous area, and when the moisture absorption layer is prepared, the moisture absorption layer is directly transferred onto the black matrix layer through a transfer printing process. And then the moisture absorption layer is bonded with the composite barrier layer arranged on the array substrate, so that the display panel provided by the embodiment of the invention is formed.
Preferably, at least one circle of frame glue 503 is further disposed in the peripheral edge region of the cover plate layer 501, and the frame glue 503 can effectively block the external water vapor. Therefore, the display panel provided by the embodiment of the invention has a simpler preparation process, the frame glue 503 can block external water vapor and the like, and the composite barrier layer and the moisture absorption layer arranged in the display panel can also block and absorb the water vapor, so that the sealing performance of the display panel is effectively improved, and the reliability of the display panel is improved.
The display panel and the method for manufacturing the display panel provided by the embodiment of the invention are described in detail, a specific example is applied to illustrate the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the technical scheme and the core idea of the invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A display panel including pixel light-emitting areas and pixel non-light-emitting areas disposed between adjacent two of the pixel light-emitting areas, the display panel comprising:
the liquid crystal display panel comprises a first substrate, a second substrate arranged opposite to the first substrate, and a black matrix layer and a moisture absorption layer which are arranged between the first substrate and the second substrate;
the moisture absorption layer is arranged on the second substrate, the black matrix layer is arranged on one side, facing the second substrate, of the first substrate, and the moisture absorption layer and the black matrix layer are correspondingly arranged in the pixel non-luminous area.
2. The display panel according to claim 1, wherein a material of the moisture absorption layer comprises at least one of moisture absorption particles, a solvent, and a dispersant.
3. The display panel of claim 2, wherein the moisture absorbing particles comprise nanoparticles comprising at least one of a group IIA metal and an oxide of a group IIA metal.
4. The display panel of claim 1, wherein the thickness of the black matrix layer is less than 10um, and the taper angle of the black matrix layer with respect to the surface of the first substrate is greater than 30 °.
5. The display panel according to claim 1, wherein the second substrate comprises:
an array substrate;
the pixel defining layer is arranged on the array substrate and is arranged in a position corresponding to the pixel non-luminous area;
a light emitting layer disposed on the array substrate and covering the pixel defining layer;
a cathode layer disposed on the light emitting layer; and the number of the first and second groups,
a composite barrier layer disposed on the cathode layer.
6. The display panel according to claim 5, wherein the composite barrier layer comprises organic layers and inorganic layers, and the organic layers and the inorganic layers are alternately disposed.
7. A preparation method of a display panel is characterized by comprising the following steps:
s100: providing a first substrate, and arranging a black matrix layer on the first substrate;
s101: providing a transfer roller, and preparing a transfer film layer on the transfer roller, wherein the transfer film layer comprises a moisture absorbent;
s102: patternwise transferring the transfer film layer onto the black matrix layer, and forming a moisture absorption layer on the black matrix layer;
s103: providing a second substrate, arranging a pixel definition layer on the second substrate, and arranging an anode layer, a light-emitting layer and a cathode layer on the second substrate in sequence;
s104: and preparing a composite barrier layer on the cathode layer, and bonding the composite barrier layer with the moisture absorption layer to obtain the display panel.
8. The method of manufacturing a display panel according to claim 7, wherein in the step S100, the black matrix layer is provided in a pixel non-emission region of the display panel.
9. The method for manufacturing a display panel according to claim 7, wherein in the step S102, in the process of transferring the transfer film layer, the pressure of the transfer roller is controlled so that the deformation amount of the transfer film layer in the process of transferring is less than 10%.
10. The method of claim 7, wherein in step S104, a composite film layer in which an inorganic water-blocking layer and an organic buffer layer are sequentially overlapped is disposed when the composite barrier layer is prepared.
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Application publication date: 20210709 |