CN111341206B - OLED display panel and manufacturing method thereof - Google Patents
OLED display panel and manufacturing method thereof Download PDFInfo
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- CN111341206B CN111341206B CN202010184620.0A CN202010184620A CN111341206B CN 111341206 B CN111341206 B CN 111341206B CN 202010184620 A CN202010184620 A CN 202010184620A CN 111341206 B CN111341206 B CN 111341206B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000012044 organic layer Substances 0.000 claims abstract description 108
- 238000005452 bending Methods 0.000 claims abstract description 57
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 125000006850 spacer group Chemical group 0.000 claims description 199
- 239000010410 layer Substances 0.000 claims description 34
- 238000005538 encapsulation Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000013013 elastic material Substances 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000001723 curing Methods 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000004844 aliphatic epoxy resin Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 238000000016 photochemical curing Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002096 quantum dot Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
-
- 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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- Engineering & Computer Science (AREA)
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- General Physics & Mathematics (AREA)
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- Electroluminescent Light Sources (AREA)
Abstract
The invention provides an OLED display panel and a manufacturing method thereof.A first organic layer has higher bending strength and higher rigidity and can support a flexible substrate, and a second organic layer has lower bending strength and better flexibility and can be conveniently bent and stretched; the first organic layer can be arranged on the lower surface of the flexible substrate and can have opposite stress with the second organic layer so as to ensure internal stress balance and prevent dislocation; the multiple spacing pieces achieve the purpose of glue injection of the retaining wall and the supporting purpose of the flexible substrate during bending.
Description
Technical Field
The invention relates to the technical field of display panels, in particular to an OLED display panel and a manufacturing method thereof.
Background
The OLED display panel is a flexible display device, and has the advantages of convenience in carrying, flexibility, curling and the like, so that the OLED display panel is a hot spot for research and development in the current display technology.
For the OLED display panel, when the panel is bent from a planar state to a folded state, the flexible substrate at the bending position has poor rigidity and large bending degree, so that the circuit in the area is broken, and the wiring is not facilitated. And when the OLED display panel is bent, the film layers at the bent part are not easy to separate, so that the display effect is ensured, and the service life of the OLED display panel is prolonged.
Disclosure of Invention
In order to solve the above problems, the present invention provides an OLED display panel including:
a flexible substrate comprising opposing first and second surfaces; the first surface sequentially comprises a display area, a bending area and a driving area;
the bending region is provided with a first spacer and a second spacer which are arranged on the first surface at intervals, and a third spacer and a fourth spacer which are arranged on the second surface at intervals;
the first spacer and the third spacer, and the second spacer and the fourth spacer correspond to each other in a vertical direction;
a first organic layer on a first surface between the first and second spacers, a second organic layer on the first organic layer, the second organic layer comprising a recess and extending at least to a top surface of the first and second spacers; wherein the bending strength of the first organic layer is greater than the bending strength of the second organic layer;
when the driving region is bent below the second surface, the sidewalls of the third and fourth spacers abut and the top surfaces thereof both abut on the second surface, and the first and second organic layers each apply a force toward the bent region to the first and second spacers, respectively.
The present invention also provides another OLED display panel, including:
a flexible substrate comprising opposing first and second surfaces; the first surface sequentially comprises a display area, a bending area and a driving area;
the bending region is provided with a first spacer and a second spacer which are arranged on the first surface at intervals, and a third spacer and a fourth spacer which are arranged on the second surface at intervals;
the first spacer and the third spacer, and the second spacer and the fourth spacer correspond to each other in a vertical direction;
a first organic layer on a second surface between the third and fourth spacers, a second organic layer on a first surface between the first and second spacers, the second organic layer comprising a recess and extending at least to a top surface of the first and second spacers; wherein the bending strength of the first organic layer is greater than the bending strength of the second organic layer;
when the driving region is bent below the second surface, the sidewalls of the third and fourth spacers abut, the top surface of one of the third and fourth spacers abuts on the second surface, and the other abuts on the first organic layer, and the first organic layer applies a force toward the display region and the driving region to the third and fourth spacers, respectively, and the second organic layer applies a force toward the bending region to the first and second spacers, respectively.
The first spacer, the second spacer, the third spacer and the fourth spacer are all made of elastic materials.
Wherein the display region includes a display device on the first surface, the driving region includes a driving circuit on the first surface, and is covered with a first encapsulation layer on the display device, and is covered with a second encapsulation layer on the driving circuit, the first encapsulation layer and the second encapsulation layer being in contact with sidewalls of the first spacer and the second spacer, respectively.
The flexible substrate comprises a first opening and a second opening, the first spacer and the third spacer are connected into a whole through the first opening, and the second spacer and the fourth spacer are connected into a whole through the first opening.
Wherein the second organic layer further extends onto the first and second encapsulation layers, and the second organic layer has cutouts on top surfaces of the first and second spacers.
The invention also provides a manufacturing method of the OLED display panel, which comprises the following steps:
(1) providing a flexible substrate comprising opposing first and second surfaces; the first surface sequentially comprises a display area, a bending area and a driving area; the display area includes a display device on a first surface, and the driving area includes a driving circuit on the first surface;
(2) forming first and second spacers arranged at intervals on the first surface of the bending region, and forming third and fourth spacers arranged at intervals on the second surface of the bending region; the first spacer and the third spacer, and the second spacer and the fourth spacer correspond to each other in a vertical direction;
(3) forming a first sealing layer by using the first spacer as a retaining wall, and forming a second sealing layer by using the second spacer as a retaining wall, wherein the first packaging layer covers the display device, and the second packaging layer covers the driving circuit;
(4) forming a first organic layer on a first surface between the first and second spacers or a second organic layer on a second surface between the third and fourth spacers; then, forming a second organic layer on the first surface between the first spacer and the second spacer, wherein the second organic layer comprises a recess and at least extends to the top surfaces of the first spacer and the second spacer; wherein the bending strength of the first organic layer is greater than the bending strength of the second organic layer; when the driving region is bent below the second surface, the sidewalls of the third and fourth spacers abut and the top surface of at least one of the third and fourth spacers abuts against the second surface.
The first spacer, the second spacer, the third spacer and the fourth spacer are all made of elastic materials.
The flexible substrate comprises a first opening and a second opening, the first spacer and the third spacer are connected into a whole through the first opening, and the second spacer and the fourth spacer are connected into a whole through the first opening.
Wherein the second organic layer further extends onto the first encapsulation layer and the second encapsulation layer, and further comprising: and cutting the second organic layer by using a cutting knife and using the first spacer and the second spacer as supporting bodies, so that the second organic layer has a notch on the top surfaces of the first spacer and the second spacer.
The first organic layer has higher bending strength and higher rigidity and can support the flexible substrate, and the second organic layer has lower bending strength and better flexibility and can be conveniently bent and stretched; the first organic layer can be arranged on the lower surface of the flexible substrate and can have opposite stress with the second organic layer so as to ensure internal stress balance and prevent dislocation; the multiple spacing pieces achieve the purpose of glue injection of the retaining wall and the supporting purpose of the flexible substrate during bending.
Drawings
Fig. 1 is a cross-sectional view of an OLED display panel of a first embodiment;
FIG. 2 is a cross-sectional view of the bent state of FIG. 1;
fig. 3 is a cross-sectional view of an OLED display panel of a second embodiment;
FIG. 4 is a cross-sectional view of the bent state of FIG. 3;
fig. 5 is a cross-sectional view of an OLED display panel of a third embodiment;
FIG. 6 is a cross-sectional view of the bent state of FIG. 5;
fig. 7 is a cross-sectional view of an OLED display panel of a fourth embodiment;
fig. 8 is a sectional view of the bent state of fig. 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First embodiment
Fig. 1 is a sectional view of an OLED display panel according to the present invention, and fig. 2 is a sectional view of fig. 1 in a bent state. As shown in fig. 1 and 2, the OLED display panel includes a display region, a bending region, and a driving region arranged in this order. The display area comprises a flexible substrate 1; a display device 2 formed on the flexible substrate 1 in this order; and a sealing layer 4 sealing the display device 2. The display device 2 may be an Organic Light-Emitting Diode (OLED) or a Quantum Dot Light-Emitting Diode (QLED), and the like, which is not limited in the present invention.
In the bending region, the flexible substrate 1 has first and second spacers 5 and 6 spaced apart on a first surface thereof, and third and fourth spacers 11 and 12 spaced apart on a second surface thereof. The spacer is made of polyethylene, polystyrene, polymethyl methacrylate, etc., preferably, it is an elastic material, and its cross-sectional shape is preferably trapezoidal or wedge-shaped. As can be seen from fig. 1, the first spacer 5 and the third spacer 11, and the second spacer 6 and the fourth spacer 12 correspond to each other in the vertical direction, wherein particularly the third spacer 11 should not be disposed under the display device 2 to prevent an influence on the display device 2 when bent.
A groove 7 is formed between the first spacer 5 and the second spacer 6, a first organic layer 10 is arranged at the bottom of the groove 7 (namely, on the first surface between the first spacer 5 and the second spacer 6), a second organic layer 9 is arranged on the first organic layer 10, and the second organic layer 9 comprises a recess 8 and at least extends to the top surfaces of the first spacer 5 and the second spacer 6; wherein the bending strength of the first organic layer 10 is greater than the bending strength of the second organic layer 8.
The first organic layer 10 and the second organic layer 9 are made of a photo-curing material, and the matrix material thereof is preferably an aliphatic epoxy resin or an acrylate compound, and at least includes a photoinitiator, an adhesive, an inorganic filler and the like other than the matrix material. The weight percentage of the photoinitiator in the first organic layer 10 is greater than that of the photoinitiator in the second organic layer 9, and the photoinitiator in the second organic layer 9 cannot complete crosslinking and curing of all the matrix materials under irradiation of a certain light quantity. Thus, the bending strength of the first organic layer 10 is greater than the bending strength of the second organic layer 8 after undergoing photo curing.
In the driving region, there is a driving circuit 3, and the driving circuit 3 is formed in an edge region of the flexible substrate 1, which needs to be bent to the lower surface of the flexible substrate 1 to reduce a lateral area. The driving circuit 3 is covered by a sealing layer 13, the sealing layers 4 and 13 can be made of the same material in the same step, and the first spacer 5 and the second spacer 6 are used as a retaining wall for the sealing layers 4 and 13, respectively, and the specific manufacturing method thereof will be described in detail below.
Referring to fig. 2, upon bending, the driving region is bent below the second surface of the flexible substrate 1, the sidewalls of the third and fourth spacers 11 and 12 abut and the top surfaces thereof both abut on the second surface, and the first and second organic layers 10 and 9 each apply a force to the first and second spacers 5 and 6, respectively, toward the bending region, see arrows in fig. 2.
Second embodiment
Fig. 3 is a sectional view of an OLED display panel according to the present invention, and fig. 4 is a sectional view of fig. 3 in a bent state. As shown in fig. 3 and 4, the structure is substantially similar to that of the first embodiment except that the first organic layer 10 is formed on the second surface between the third spacer 11 and the second spacer 12, and the second organic layer 9 is in direct contact with the first surface at the groove portion.
In this embodiment, the bending strength of the first organic layer is also greater than that of the second organic layer, and the material is also the same as that of the first embodiment.
And, when the driving region is bent under the second surface, the sidewalls of the third spacer 11 and the fourth spacer 12 abut, the top surface of one of the third spacer 11 and the fourth spacer 12 abuts on the second surface (e.g., the third spacer 11 in fig. 4) and the other abuts on the first organic layer (e.g., the fourth spacer 12 in fig. 4), and the first organic layer 10 applies a force toward the display region and the driving region to the third spacer 11 and the fourth spacer 12, respectively, and the second organic layer 9 applies a force toward the bending region to the first spacer 5 and the second spacer 6, respectively, see arrows in fig. 4.
Third embodiment
Fig. 5 is a sectional view of an OLED display panel according to the present invention, and fig. 6 is a sectional view of a bent state of fig. 5. As shown in fig. 5 and 6, the structure is substantially similar to that of the first embodiment except that the first spacer 5 and the third spacer 11 are united into one by the through hole 16 in the flexible substrate 1 to form the spacer 14, and the second spacer 6 and the fourth spacer 12 are united into one by the bump 17 to form the spacer 15, so that the spacers can be prevented from being peeled off from the flexible substrate 1.
In this embodiment, the bending strength of the first organic layer is also greater than that of the second organic layer, and the material is also the same as that of the first embodiment. And the arrangement of the first organic layer 10 may also be arranged on the second surface, similar to the second embodiment (not shown).
Fourth embodiment
Fig. 7 is a sectional view of an OLED display panel according to the present invention, and fig. 8 is a sectional view of a bent state of fig. 7. As shown in fig. 7 and 8, the structure is substantially similar to that of the second embodiment, except that the second organic layer extends not only on the top surfaces of the first and second spacers 5 and 6, but also on the encapsulation layers 4 and 13, and has a cut 21 on the top surfaces of the first and second spacers 5 and 6, the cut 21 dividing the second organic layer into a first portion 20 in the display region, a second portion 19 in the bending region, and a third portion 18 in the driving region, the presence of the cut 21 making the first and third portions 20 and 18 less prone to stretch when bent, thereby preventing problems such as poor sealing.
According to the first to fourth embodiments described above, the present invention also provides a method of manufacturing an OLED display panel, including:
(1) providing a flexible substrate comprising opposing first and second surfaces; the first surface sequentially comprises a display area, a bending area and a driving area; the display area includes a display device on a first surface, and the driving area includes a driving circuit on the first surface;
(2) forming first and second spacers arranged at intervals on the first surface of the bending region, and forming third and fourth spacers arranged at intervals on the second surface of the bending region; the first spacer and the third spacer, and the second spacer and the fourth spacer correspond to each other in a vertical direction;
(3) forming a first sealing layer by using the first spacer as a retaining wall, and forming a second sealing layer by using the second spacer as a retaining wall, wherein the first packaging layer covers the display device, and the second packaging layer covers the driving circuit;
(4) forming a first organic layer on a first surface between the first and second spacers or a second organic layer on a second surface between the third and fourth spacers; then, forming a second organic layer on the first surface between the first spacer and the second spacer, wherein the second organic layer comprises a recess and at least extends to the top surfaces of the first spacer and the second spacer; wherein the bending strength of the first organic layer is greater than the bending strength of the second organic layer; when the driving region is bent below the second surface, the sidewalls of the third and fourth spacers abut and the top surface of at least one of the third and fourth spacers abuts against the second surface.
The material of the first organic layer and the second organic layer is a light-cured material, the matrix material is preferably an aliphatic epoxy resin or an acrylate compound, and the matrix material at least comprises a photoinitiator, an adhesive, an inorganic filler and the like except the matrix material. The weight percentage of the photoinitiator in the first organic layer is greater than that of the photoinitiator in the second organic layer, and the photoinitiator in the second organic layer cannot complete crosslinking and curing of all the matrix materials under irradiation of a certain light quantity. Therefore, after the first organic layer and the second organic layer are formed, the method further comprises the step of performing light irradiation curing so that the bending strength of the first organic layer is greater than that of the second organic layer.
The first spacer, the second spacer, the third spacer and the fourth spacer are all made of elastic materials.
The flexible substrate comprises a first opening and a second opening, the first spacer and the third spacer are connected into a whole through the first opening, and the second spacer and the fourth spacer are connected into a whole through the first opening.
Wherein the second organic layer further extends onto the first encapsulation layer and the second encapsulation layer, and further comprising: and cutting the second organic layer by using a cutting knife and using the first spacer and the second spacer as supporting bodies, so that the second organic layer has a notch on the top surfaces of the first spacer and the second spacer.
The first organic layer has higher bending strength and higher rigidity and can support the flexible substrate, and the second organic layer has lower bending strength and better flexibility and can be conveniently bent and stretched; the first organic layer can be arranged on the lower surface of the flexible substrate and can have opposite stress with the second organic layer so as to ensure internal stress balance and prevent dislocation; the multiple spacing pieces achieve the purpose of glue injection of the retaining wall and the supporting purpose of the flexible substrate during bending.
The expressions "exemplary embodiment," "example," and the like, as used herein, do not refer to the same embodiment, but are provided to emphasize different particular features. However, the above examples and exemplary embodiments do not preclude their implementation in combination with features of other examples. For example, even in a case where a description of a specific example is not provided in another example, unless otherwise stated or contrary to the description in the other example, the description may be understood as an explanation relating to the other example.
The terminology used in the present invention is for the purpose of illustrating examples only and is not intended to be limiting of the invention. Unless the context clearly dictates otherwise, singular expressions include plural expressions.
While example embodiments have been shown and described, it will be apparent to those skilled in the art that modifications and changes may be made without departing from the scope of the invention as defined by the claims.
Claims (10)
1. An OLED display panel, comprising:
a flexible substrate comprising opposing first and second surfaces; the first surface sequentially comprises a display area, a bending area and a driving area;
the bending region is provided with a first spacer and a second spacer which are arranged on the first surface at intervals, and a third spacer and a fourth spacer which are arranged on the second surface at intervals;
the first spacer and the third spacer, and the second spacer and the fourth spacer correspond to each other in a vertical direction;
a first organic layer on a first surface between the first and second spacers, a second organic layer on the first organic layer, the second organic layer comprising a recess and extending at least to a top surface of the first and second spacers; wherein the bending strength of the first organic layer is greater than the bending strength of the second organic layer;
when the driving region is bent below the second surface, the sidewalls of the third and fourth spacers abut and the top surfaces thereof both abut on the second surface, and the first and second organic layers each apply a force toward the bent region to the first and second spacers, respectively.
2. An OLED display panel, comprising:
a flexible substrate comprising opposing first and second surfaces; the first surface sequentially comprises a display area, a bending area and a driving area;
the bending region is provided with a first spacer and a second spacer which are arranged on the first surface at intervals, and a third spacer and a fourth spacer which are arranged on the second surface at intervals;
the first spacer and the third spacer, and the second spacer and the fourth spacer correspond to each other in a vertical direction;
a first organic layer on a second surface between the third and fourth spacers, a second organic layer on a first surface between the first and second spacers, the second organic layer comprising a recess and extending at least to a top surface of the first and second spacers; wherein the bending strength of the first organic layer is greater than the bending strength of the second organic layer;
when the driving region is bent below the second surface, the sidewalls of the third and fourth spacers abut, the top surface of one of the third and fourth spacers abuts on the second surface, and the other abuts on the first organic layer, and the first organic layer applies a force toward the display region and the driving region to the third and fourth spacers, respectively, and the second organic layer applies a force toward the bending region to the first and second spacers, respectively.
3. The OLED display panel of claim 1 or 2, wherein: the first spacer, the second spacer, the third spacer and the fourth spacer are all made of elastic materials.
4. The OLED display panel of claim 3, wherein: the display region includes a display device on a first surface, the driving region includes a driving circuit on the first surface, and is covered with a first encapsulation layer on the display device, and is covered with a second encapsulation layer on the driving circuit, the first encapsulation layer and the second encapsulation layer are in contact with sidewalls of the first spacer and the second spacer, respectively.
5. The OLED display panel of claim 4, wherein: the flexible substrate comprises a first opening and a second opening, the first spacer and the third spacer are connected into a whole through the first opening, and the second spacer and the fourth spacer are connected into a whole through the first opening.
6. The OLED display panel of claim 5, wherein: the second organic layer also extends onto the first and second encapsulation layers, and the second organic layer has cutouts on top surfaces of the first and second spacers.
7. A method of manufacturing an OLED display panel, comprising:
(1) providing a flexible substrate comprising opposing first and second surfaces; the first surface sequentially comprises a display area, a bending area and a driving area; the display area includes a display device on a first surface, and the driving area includes a driving circuit on the first surface;
(2) forming first and second spacers arranged at intervals on the first surface of the bending region, and forming third and fourth spacers arranged at intervals on the second surface of the bending region; the first spacer and the third spacer, and the second spacer and the fourth spacer correspond to each other in a vertical direction;
(3) forming a first sealing layer by using the first spacer as a retaining wall, and forming a second sealing layer by using the second spacer as a retaining wall, wherein the display device further comprises a first packaging layer covering the display device, and a second packaging layer covering the driving circuit;
(4) forming a first organic layer on a first surface between the first and second spacers or a second organic layer on a second surface between the third and fourth spacers; then, forming a second organic layer on the first surface between the first spacer and the second spacer, wherein the second organic layer comprises a recess and at least extends to the top surfaces of the first spacer and the second spacer; wherein the bending strength of the first organic layer is greater than the bending strength of the second organic layer; when the driving region is bent below the second surface, the sidewalls of the third and fourth spacers abut and the top surface of at least one of the third and fourth spacers abuts against the second surface.
8. The method of manufacturing an OLED display panel according to claim 7, characterized in that: the first spacer, the second spacer, the third spacer and the fourth spacer are all made of elastic materials.
9. The method of manufacturing an OLED display panel according to claim 7, characterized in that: the flexible substrate comprises a first opening and a second opening, the first spacer and the third spacer are connected into a whole through the first opening, and the second spacer and the fourth spacer are connected into a whole through the first opening.
10. The method of manufacturing an OLED display panel according to claim 7, characterized in that: the second organic layer also extends onto the first encapsulation layer and the second encapsulation layer, and further includes: and cutting the second organic layer by using a cutting knife and using the first spacer and the second spacer as supporting bodies, so that the second organic layer has a notch on the top surfaces of the first spacer and the second spacer.
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