CN109256483B - Display panel and method for manufacturing the same - Google Patents

Display panel and method for manufacturing the same Download PDF

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Publication number
CN109256483B
CN109256483B CN201811014893.XA CN201811014893A CN109256483B CN 109256483 B CN109256483 B CN 109256483B CN 201811014893 A CN201811014893 A CN 201811014893A CN 109256483 B CN109256483 B CN 109256483B
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layer
substrate
inorganic
light emitting
barrier
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CN109256483A (en
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蒋岩东
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Yungu Guan Technology Co Ltd
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Yungu Guan Technology Co Ltd
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/844—Encapsulations
    • 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
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • 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

Abstract

The application discloses display panel, this display panel includes: a substrate; a light emitting unit array layer disposed on the substrate; a first inorganic layer disposed on the light emitting cell array layer and the substrate; the barrier layer is arranged on the substrate and arranged on the side edge of the first inorganic layer far away from the light-emitting unit array layer, and the barrier layer and the first inorganic layer are arranged on the substrate at intervals so that grooves are formed among the barrier layer, the first inorganic layer and the substrate; the organic layer is arranged on the first inorganic layer, the barrier layer, the substrate at the corresponding position of the groove and the substrate at one side of the barrier layer far away from the light-emitting unit array layer; and the second inorganic layer is arranged on the organic layer and the substrate, and at least part of the second inorganic layer is positioned in the groove.

Description

Display panel and method for manufacturing the same
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a manufacturing method thereof.
Background
With the development of science and technology, display panels have become the necessities of people's life, and are the focus of controversy and research of various manufacturers.
Due to the advantages of lightness, thinness, softness and the like, the flexible panel is widely used in the fields of mobile phones, televisions, business and the like, and gradually permeates the fields of automobiles, virtual reality, health lighting and the like. However, in the reliability test of the flexible panel, as the bending radius decreases and the bending times increase, the packaging layer of the display device will be cracked or cracked, which seriously affects the use of the user.
Disclosure of Invention
The invention mainly solves the technical problem of providing a display panel and a manufacturing method thereof, which can increase the bending tolerance and the water vapor blocking capability of a packaging film layer of the display panel.
In order to solve the above technical problem, one technical solution adopted in the embodiments of the present application is: provided is a display panel including: a substrate; a light emitting unit array layer disposed on the substrate; a first inorganic layer disposed on the light emitting cell array layer and the substrate; the barrier layer is arranged on the substrate and arranged on the side edge of the first inorganic layer far away from the light-emitting unit array layer, and the barrier layer and the first inorganic layer are arranged on the substrate at intervals so that grooves are formed among the barrier layer, the first inorganic layer and the substrate; the organic layer is arranged on the first inorganic layer, the barrier layer, the substrate at the corresponding position of the groove and the substrate at one side of the barrier layer far away from the light-emitting unit array layer; and the second inorganic layer is arranged on the organic layer and the substrate, and at least part of the second inorganic layer is positioned in the groove.
Wherein, the surface of the first inorganic layer, which faces away from the substrate, is flush with the surface of the barrier layer, which faces away from the substrate.
Wherein the barrier layer is disposed around the first inorganic layer and the light emitting cell array layer.
The base plate comprises a flexible substrate and a TFT array layer arranged on the flexible substrate.
Wherein the organic layer is an organic glue layer.
The light emitting unit array layer is an OLED light emitting unit array layer.
The barrier layer and the first inorganic layer are made of the same material.
Wherein the thickness of the blocking layer is equal to the sum of the thickness of the light emitting cell array layer and the thickness of the portion of the first inorganic layer on the light emitting cell array layer.
In order to solve the above technical problem, another technical solution adopted in the embodiment of the present application is: provided is a method of manufacturing a display panel, the method including: providing a substrate; forming a light emitting cell array layer on a substrate; forming an inorganic material layer on the light emitting cell array layer and the substrate; etching the part of the inorganic material layer on the substrate to form a groove, wherein the groove penetrates through the inorganic material layer and divides the inorganic material layer into a first inorganic layer and a barrier layer; forming an organic layer on the first inorganic layer, the barrier layer, and the substrate; the organic layer is formed on the substrate at the position corresponding to the groove, and the barrier layer is formed on the substrate at the side far away from the light-emitting unit array layer; a second inorganic layer is formed over the organic layer and the substrate, wherein the second inorganic layer is at least partially disposed in the recess.
Wherein the organic layer is an organic glue layer
The display panel comprises a light emitting unit array layer and is arranged on the substrate; a first inorganic layer disposed on the light emitting cell array layer and the substrate; the barrier layer is arranged on the substrate and arranged on the side edge of the first inorganic layer far away from the light-emitting unit array layer, and the barrier layer and the first inorganic layer are arranged on the substrate at intervals so that grooves are formed among the barrier layer, the first inorganic layer and the substrate; the organic layer is arranged on the first inorganic layer, the barrier layer, the substrate at the corresponding position of the groove and the substrate at one side of the barrier layer far away from the light-emitting unit array layer; and the second inorganic layer is arranged on the organic layer and the substrate, and at least part of the second inorganic layer is positioned in the groove. Because the barrier layer sets up with first inorganic layer interval, form the recess between the two, organic layer partly forms in the recess, the inorganic layer of second also has the part to be located the recess, make organic layer and first inorganic layer, imbed each other between the inorganic layer of second, thereby improve organic layer, first inorganic layer, the adhesion between the inorganic layer of second, avoid droing between the rete, again because organic layer, the inorganic layer part of second sets up in the recess, make organic layer form the structure of buckling and extending in non-display area, buckle and extend between first inorganic layer and the inorganic layer of second, thereby can release the stress of buckling, promote the tolerance of buckling, and can increase the route that steam invaded, improve steam barrier capacity.
Drawings
FIG. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a substrate, a barrier layer, a first inorganic layer and a light emitting cell array according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a top view of a barrier layer, a first inorganic layer, and a recess according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. 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 application.
In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indicators in the embodiments of the present application (such as upper, lower, left, right, front, rear, top, bottom … …) are only used to explain the relative positional relationship between the components, the movement, etc. in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
The terms "first", "second", etc. in this application are used to distinguish between different objects and not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 2 and fig. 3 in combination, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure. Fig. 2 is a schematic structural diagram of a substrate, a barrier layer, a first inorganic layer, and a light emitting cell array according to an embodiment of the present disclosure. Fig. 3 is a schematic top view of a barrier layer, a first inorganic layer, and a groove according to an embodiment of the present disclosure.
In the present embodiment, the display panel includes a substrate 10, a light emitting cell array layer 11, a first inorganic layer 12, a barrier layer 13, an organic layer 14, and a second inorganic layer 15.
The display panel may be an OLED (Organic Light-Emitting Diode) display panel.
The substrate 10 includes a flexible substrate 101 and a TFT (Thin Film Transistor) array layer 102 disposed on the flexible substrate 101. The TFT array layer 102 includes a plurality of TFTs arrayed on the flexible substrate 101.
The flexible substrate 101 may be made of PI (Polyimide Film). It should be understood that the flexible substrate 101 may be made of other flexible light permeable materials. The substrate of the base plate may be made of a hard material such as a glass base plate, a plastic base plate, or the like. The embodiment of the present application does not limit this.
The light emitting cell array layer 11 is disposed on the substrate 10. The light emitting cell array layer 11 may be an OLED light emitting cell array layer.
The first inorganic layer 12 is disposed on the light emitting cell array layer 11 and the substrate 10.
The barrier layer 13 is disposed on the substrate 10 and disposed on a side of the first inorganic layer 12 away from the light emitting cell array layer 11, and the barrier layer 13 and the first inorganic layer 12 are disposed on the substrate 10 at an interval, so that a groove a is formed among the barrier layer 13, the first inorganic layer 12, and the substrate 10.
The barrier layer 13 is disposed on a non-display region of the display panel. Optionally, the barrier layer 13 is provided at an edge region of the substrate 10. For example, the barrier layer 13 is between 0.1 and 0.5mm from the nearest edge of the substrate 10.
Alternatively, the barrier layer 13 and the first inorganic layer 12 are made of the same material. When the barrier layer 13 and the first inorganic layer 12 are formed, the barrier layer 13 and the first inorganic layer 12 are formed in the same process, which saves the manufacturing process, for example, the inorganic material layer is formed on the light emitting cell array layer 11 and the substrate 10, and then the portion of the inorganic material layer on the substrate 10 is etched to form the groove a, which penetrates through the inorganic material layer and separates the inorganic material layer into the first inorganic layer 12 and the barrier layer 13.
Optionally, the barrier layer 13 and the first inorganic layer 12 both use inorganic materials with good water resistance, so that the first inorganic layer 12 and the barrier layer 13 have good water and oxygen barrier effects. The inorganic material may be silicon nitride (SiN)x) Silicon dioxide (SiO)2) Or aluminum oxide (Al)2O3)。
Alternatively, the barrier layer 13 is disposed around the first inorganic layer 12 and the light emitting cell array layer 11. In other words, the barrier layer 13 is disposed around the display area.
The barrier layers 13 are provided on four sides of the first inorganic layer 12 and the light emitting cell array layer 11. The barrier layer 13 extends in a closed shape on the substrate 10. The closed shape is not limited to a ring shape, a rectangular shape, a circular shape, an oval shape, or the like.
It will be understood that in the case where the barrier layer 13 is disposed around the first inorganic layer 12 and the light emitting cell array layer 11, the groove between the barrier layer 13 and the first inorganic layer 12 is also disposed around the first inorganic layer 12 and the light emitting cell array layer 11, forming a groove extending in a closed shape.
In other embodiments, the blocking layer 13 may be disposed only on one side, two sides, or three sides of the display region, that is, only on one side, two sides, or three sides of the first inorganic layer 12 and the light emitting cell array layer 11, and it is not necessary to form the blocking layer 13 extending in a closed shape, which is not limited in this embodiment.
The organic layer 14 is disposed on the first inorganic layer 12, on the barrier layer 13, on the substrate 10 corresponding to the groove a, and on the substrate 10 at the side of the barrier layer 13 far from the light emitting cell array layer 11.
The organic layer 14 may be an organic glue layer. For example, the organic adhesive layer is made of an organic material with good flexibility, so that the organic layer 14 has a good flexible buffering function, and the organic material may be one or a combination of polyvinyl alcohol, a polyurethane acrylate polymer, and a polyimide resin.
A second inorganic layer 15 is disposed on the organic layer 14 and the substrate 10, the second inorganic layer 15 being at least partially located in the recess a.
Optionally, the second inorganic layer 15 is made of an inorganic material with good water resistance, so that the second inorganic layer 15 has a good water and oxygen barrier effect. The inorganic material may be silicon nitride (SiN)x) Silicon dioxide (SiO)2) Or aluminum oxide (Al)2O3)。
The surface of the first inorganic layer 12 facing away from the substrate 10 is flush with the surface of the barrier layer 13 facing away from the substrate 10.
Alternatively, the thickness of the barrier layer 13 is equal to the sum of the thickness of the light emitting cell array layer 11 and the thickness of the portion of the first inorganic layer 12 on the light emitting cell array layer 11.
The embodiment of the application adopts the first inorganic layer 12 and the second inorganic layer 15 which are arranged at intervals in the thickness direction of the display panel, and the organic layer 14 is filled between the first inorganic layer 12 and the second inorganic layer 15 to form a structure in which the organic layers and the inorganic layers are alternately arranged, so that the stress of the inorganic layers can be dispersed, and the bending resistance of the device can be improved.
In the embodiment of the application, the barrier layer 13 is arranged in the non-display area of the substrate 10 to prevent the invasion of water vapor; because the barrier layer 13 and the first inorganic layer 12 are arranged on the substrate 10 at intervals, a groove a is formed between the barrier layer 13 and the first inorganic layer 12, the groove a, the barrier layer 13 and the first inorganic layer 12 form a height structure, after the organic layer 14 is formed, the organic layer 14 is bent and extended on the height structure, so that an invasion path of water vapor is increased, the water vapor is prevented from influencing the performance of a light-emitting element in the OLED light-emitting element array layer, meanwhile, because the organic layer and the inorganic layer are embedded with each other, the adhesion force between the organic layer and the inorganic layer is increased, and the film layer is prevented from falling off; the organic layer 14 is bent and extended in the non-display area, so that the bending stress can be released, and the bending resistance is improved; since the barrier layer 13 and the first inorganic layer 12 are formed in the same process, a whole inorganic material layer is formed first and then the groove is formed on the inorganic material layer, so that the process can be saved and the above-mentioned various advantageous effects can be achieved by a simple process.
Referring to fig. 4, fig. 4 is a schematic flow chart illustrating a manufacturing method of a display panel according to an embodiment of the present application.
In this embodiment, the method for manufacturing a display panel may include the steps of:
step S101: a substrate is provided.
The substrate 10 includes a flexible substrate 101 and a Thin Film Transistor (TFT) array layer 102 disposed on the flexible substrate 101. The TFT array layer 102 includes a plurality of TFTs arrayed on the flexible substrate 101.
Step S102: a light emitting cell array layer is formed on a substrate.
The light emitting cell array layer 11 may be an OLED light emitting cell array layer. The OLED light emitting unit array layer comprises a plurality of OLED light emitting units arranged in an array.
Step S103: an inorganic material layer is formed on the light emitting cell array layer and the substrate.
Wherein an entire layer of inorganic material is deposited on the light emitting cell array layer 11 and the substrate 10. The Deposition process may be Physical Vapor Deposition (PVD), Chemical Vapor Deposition (CVD), or the like.
Step S104: and etching the part of the inorganic material layer on the substrate to form a groove, wherein the groove penetrates through the inorganic material layer and divides the inorganic material layer into a first inorganic layer and a barrier layer.
Wherein, the part of the inorganic material layer on the substrate 10 is etched to form a groove a, the groove a penetrates through the inorganic material layer and divides the inorganic material layer into a first inorganic layer 12 and a barrier layer 13
Step S105: forming an organic layer on the first inorganic layer, the barrier layer, and the substrate; the organic layer is formed on the substrate at the position corresponding to the groove, and the barrier layer is formed on the substrate at the side far away from the light-emitting unit array layer.
Wherein an organic layer 14 is deposited on the first inorganic layer 12, the barrier layer 13 and on the substrate 10. The organic layer 14 is deposited on the substrate 10 at a position corresponding to the groove a, and is deposited on the substrate 10 at a side of the barrier layer 13 away from the light emitting cell array layer 11.
Step S106: a second inorganic layer is formed over the organic layer and the substrate, wherein the second inorganic layer is at least partially disposed in the recess.
Wherein a second inorganic layer 15 is formed on the organic layer 14 and the substrate 10, wherein the second inorganic layer 15 is at least partially located in the recess a.
The display panel comprises a light emitting unit array layer and is arranged on the substrate; a first inorganic layer disposed on the light emitting cell array layer and the substrate; the barrier layer is arranged on the substrate and arranged on the side edge of the first inorganic layer far away from the light-emitting unit array layer, and the barrier layer and the first inorganic layer are arranged on the substrate at intervals so that grooves are formed among the barrier layer, the first inorganic layer and the substrate; the organic layer is arranged on the first inorganic layer, the barrier layer, the substrate at the corresponding position of the groove and the substrate at one side of the barrier layer far away from the light-emitting unit array layer; and the second inorganic layer is arranged on the organic layer and the substrate, and at least part of the second inorganic layer is positioned in the groove. Because the barrier layer sets up with first inorganic layer interval, form the recess between the two, organic layer partly forms in the recess, the inorganic layer of second also has the part to be located the recess, make organic layer and first inorganic layer, imbed each other between the inorganic layer of second, thereby improve organic layer, first inorganic layer, the adhesion between the inorganic layer of second, avoid droing between the rete, again because organic layer, the inorganic layer part of second sets up in the recess, make organic layer form the structure of buckling and extending in non-display area, buckle and extend between first inorganic layer and the inorganic layer of second, thereby can release the stress of buckling, promote the tolerance of buckling, and can increase the route that steam invaded, improve steam barrier capacity.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (9)

1. A display panel, comprising:
a substrate;
a light emitting unit array layer disposed on the substrate;
a first inorganic layer disposed on the light emitting cell array layer and the substrate;
the barrier layer and the first inorganic layer are arranged on the substrate at intervals, so that a groove is formed among the barrier layer, the first inorganic layer and the substrate;
the organic layer is arranged on the first inorganic layer, the barrier layer, the substrate at the corresponding position of the groove and the substrate at the side edge of the barrier layer far away from the light-emitting unit array layer;
a second inorganic layer disposed on the organic layer and the substrate, the second inorganic layer being at least partially disposed in the recess;
the surface of the first inorganic layer, which faces away from the substrate, is flush with the surface of the barrier layer, which faces away from the substrate, and the first inorganic layer and the barrier layer are formed in the same process.
2. The display panel according to claim 1, wherein the barrier layer is disposed around the first inorganic layer and the light emitting cell array layer.
3. The display panel according to claim 1, wherein the base plate comprises a flexible substrate and a TFT array layer disposed on the flexible substrate.
4. The display panel according to claim 1, wherein the organic layer is an organic glue layer.
5. The display panel of claim 1, wherein the light emitting cell array layer is an OLED light emitting cell array layer.
6. The display panel of claim 1, wherein the barrier layer is the same material as the first inorganic layer.
7. The display panel according to claim 1, wherein a thickness of the barrier layer is equal to a sum of a thickness of the light emitting cell array layer and a thickness of a portion of the first inorganic layer on the light emitting cell array layer.
8. A method of manufacturing a display panel, the method comprising:
providing a substrate;
forming a light emitting cell array layer on a substrate;
forming an inorganic material layer on the light emitting cell array layer and the substrate;
etching the part of the inorganic material layer on the substrate to form a groove, wherein the groove penetrates through the inorganic material layer and divides the inorganic material layer into a first inorganic layer and a barrier layer, and the surface of the first inorganic layer, which is back to the substrate, is flush with the surface of the barrier layer, which is back to the substrate;
forming an organic layer on the first inorganic layer, the barrier layer, and the substrate; the organic layer is formed on the substrate at the position corresponding to the groove, and the barrier layer is formed on the substrate at one side far away from the light-emitting unit array layer;
forming a second inorganic layer on the organic layer and the substrate, wherein the second inorganic layer is at least partially located in the recess.
9. The manufacturing method according to claim 8, wherein the organic layer is an organic glue layer.
CN201811014893.XA 2018-08-31 2018-08-31 Display panel and method for manufacturing the same Active CN109256483B (en)

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CN111063820A (en) * 2019-12-02 2020-04-24 武汉华星光电半导体显示技术有限公司 Display device and manufacturing method thereof
CN111129347A (en) * 2019-12-23 2020-05-08 武汉华星光电半导体显示技术有限公司 Display panel and manufacturing method thereof
CN111180489B (en) * 2019-12-31 2022-12-09 武汉天马微电子有限公司 Display panel and display device
CN111739415A (en) * 2020-06-17 2020-10-02 昆山国显光电有限公司 Display panel and display device

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CN105261712B (en) * 2015-08-31 2017-07-25 上海和辉光电有限公司 A kind of flexible OLED display panel
CN205985076U (en) * 2016-08-30 2017-02-22 昆山国显光电有限公司 Organic light emitting display device and thin film encapsulation structure
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