CN113424333A - Display panel, display device and manufacturing method of display panel - Google Patents
Display panel, display device and manufacturing method of display panel Download PDFInfo
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- CN113424333A CN113424333A CN201980090109.XA CN201980090109A CN113424333A CN 113424333 A CN113424333 A CN 113424333A CN 201980090109 A CN201980090109 A CN 201980090109A CN 113424333 A CN113424333 A CN 113424333A
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- 238000004806 packaging method and process Methods 0.000 abstract description 9
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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
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/871—Self-supporting sealing arrangements
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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
- H10K59/80—Constructional details
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Abstract
A display panel (100) comprises a substrate (10), a first electrode layer (20) arranged on the substrate (10), a support structure (103) arranged on a pixel definition layer (30), an organic light emitting layer (50) arranged on the first electrode layer (20) and located between adjacent pixel definition layers (30), and a second electrode layer (60) arranged on the organic light emitting layer (50) and extending to cover the support structure (103). At least one groove (104) is formed in one side, back to the pixel defining layer (30), of the supporting structure (103), and the width of the groove (104) is gradually reduced along the direction from the supporting structure (103) to the pixel defining layer (30). A display device (300) and a method for manufacturing the display panel (100) are also provided. The damage to the supporting structure (103) in the manufacturing process of the display panel (100) can be reduced, and the packaging reliability of the display panel (100) is improved, so that the display effect of the display panel (100) is improved.
Description
The present disclosure relates to the field of display technologies, and in particular, to a display panel, a display device, and a method for manufacturing the display panel.
The existing display screens are all provided with a layer of supporting structure (Photo Space, PS) for supporting the metal mask plate and the rear cover substrate attached to the display screen in the production process. However, due to the flatness of the metal mask, that is, the surface of the metal mask has particulate foreign matters and is affected by the evaporation process, the metal mask may damage the support structure or the material layer deposited on the support structure (such as scratching or extrusion deformation), and thus the display effect of the display panel is affected due to abnormal film layer at the support structure. Wherein the larger the contact area of the support structure and the metal mask plate is, the larger the damage area to the support structure or to the material layer deposited on the support structure is.
Disclosure of Invention
The embodiment of the application discloses a display panel, a display device and a manufacturing method of the display panel to solve the technical problems.
In a first aspect, an embodiment of the present application discloses a display panel, including:
a substrate;
a first electrode layer disposed on the substrate;
the pixel defining layers are arranged on the first electrode layer at intervals;
the supporting structure is arranged on the pixel defining layer;
the organic light-emitting layer is arranged on the first electrode layer and positioned between the adjacent pixel defining layers; and
the second electrode layer is arranged on the organic light-emitting layer and extends to cover the support structure;
at least one groove is formed in one side, back to the pixel definition layer, of the supporting structure, and the width of the groove is gradually reduced along the direction from the supporting structure to the pixel definition layer.
In a second aspect, the present application further discloses a display device comprising the display panel of the first aspect.
In a third aspect, an embodiment of the present application further discloses a method for manufacturing a display panel, including:
providing a substrate and depositing a first electrode layer, a pixel definition layer and a support structure on the substrate in sequence; wherein, one side of the supporting structure, which is back to the pixel defining layer, is provided with at least one groove;
depositing organic light-emitting layers between the pixel defining layers, and evaporating the organic light-emitting layers by using a mask plate;
carrying out optical detection on the evaporated substrate to determine the damage position of the support structure;
and repairing the damaged position by adopting laser irradiation.
According to the display panel, the display device and the manufacturing method of the display panel, the supporting structure is back to one side of the pixel definition layer, and at least one groove is formed in the supporting structure, so that the contact area between the supporting structure and a mask plate is reduced, and further the damage of the mask plate to the supporting structure is reduced. In addition, due to the existence of the groove, the excessive film layers of the supporting structure due to scratching or extrusion deformation can be laterally transferred, so that the excessive film layers are prevented from being too high in the normal film layers, the supporting structure can be covered by the subsequent film packaging with a certain thickness, and the packaging effect reliability is guaranteed.
Further, the damaged position of the supporting structure is determined through optical detection, and laser irradiation is adopted to repair the damaged position, so that the damaged position is heated and decomposed, the effect of repairing the damaged position is achieved, the reliability of subsequent packaging is further improved, and the display effect of the display panel is further improved.
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1A is a schematic plan view of a display panel according to an embodiment of the present application.
Fig. 1B is a schematic plan view of a display panel in another embodiment of the present application.
Fig. 2 is a cross-sectional view of the display panel of fig. 1A taken along direction II-II.
Fig. 3 is a schematic cross-sectional view of a display panel according to another embodiment of the present application.
Fig. 4 is a schematic view illustrating a mask plate being placed in a manufacturing process of a display panel according to an embodiment of the present application.
Fig. 5 is a partially enlarged schematic view of a portion a of fig. 4.
Fig. 6 is a schematic view illustrating the auxiliary light-emitting layer being pressed by the foreign substance on the mask in fig. 5.
Fig. 7A is a schematic plan view of a support structure in an embodiment of the present application.
Fig. 7B is a schematic plan view of a support structure in another embodiment of the present application.
Fig. 7C is a schematic plan view of a support structure in another embodiment of the present application.
Fig. 8 is a block diagram of a display device according to an embodiment of the present application.
Fig. 9 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present application.
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, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
In the description of the embodiments of the present invention, it should be understood that the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit indication of 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 embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other suitable relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
Please refer to fig. 1A, which is a schematic plan view of a display panel 100 according to an embodiment of the present application. The display panel 100 includes, but is not limited to, products or components having a display function, such as an Organic Light-Emitting Diode (OLED) display panel, a Quantum Dot display (QLED) panel, and a Touch screen (Touch panel). In this embodiment, the display panel 100 is an OLED display panel.
As shown in fig. 1A, the display area of the display panel 100 includes a plurality of pixel units 101, and each pixel unit 101 includes a plurality of sub-pixel units 102. Wherein, a supporting structure 103 is disposed between the plurality of sub-pixel units 102 in each pixel unit 101. In this embodiment, the pixel units 101 are distributed in the display area in a matrix manner. The plurality of sub-pixel units 102 in each of the pixel units 101 are arranged in rows or columns. Referring to fig. 1B, in other embodiments, the plurality of pixel units 101 may also be distributed in the display area in an irregular manner. The plurality of sub-pixel units 102 in each of the pixel units 101 are also arranged in an irregular manner, which is not limited herein. When the plurality of sub-pixel units 102 in each of the pixel units 101 are arranged in an irregular manner, the arrangement position of the support structure 103 is not limited as long as it is located between the adjacent sub-pixel units 102.
It is understood that the display panel 100 may further include a non-display region surrounding the display region. However, as the full-screen technology is developed, the area of the non-display region included in the display panel 100 may be smaller, and even the display panel 100 may not include the non-display region.
Referring to fig. 2, the display panel 100 includes a substrate 10, a first electrode layer 20, a pixel defining layer 30, a supporting structure 103, an auxiliary light emitting layer 40, an organic light emitting layer 50, and a second electrode layer 60, which are sequentially stacked. In the present embodiment, the substrate 10 is a flexible substrate, that is, the substrate 10 is made of a flexible material. Such as, but not limited to, flexible transparent plastic, flexible glass, or metal foil. The substrate 10 is used to support the entire display panel 100. In other embodiments, the substrate 10 may also be a rigid substrate, such as a glass substrate.
The first electrode layer 20 is disposed on the substrate 10. The first electrode layer 20 may be a transparent ITO (Indium Tin Oxide) electrode or a metal electrode. The metal electrode may be made of metal, alloy, conductive metal oxide, conductive polymer, or the like. In this embodiment, the first electrode layer 20 is an anode and is a transparent ITO electrode layer.
The pixel defining layers 30 are disposed on the first electrode layer 20 at intervals. The pixel defining layer 30, also referred to as an insulating layer, may be an organic material layer. For example, the pixel defining layer 30 includes at least one of polyimide, polyamide, benzocyclobutene, acrylic resin, silicone, polymethyl methacrylate (PMMA), or phenolic resin.
The supporting structure 103 is disposed on the pixel defining layer 30, and is mainly used for supporting a mask plate 200 (see fig. 4) used for depositing other layers (such as an organic light emitting layer) on the substrate 10, that is, as long as the mask plate 200 is needed to be used when depositing other layers, the mask plate 200 can be supported by the supporting structure 103. The support structure 103 may be made of a resin material such as polyimide by a patterning process, the patterning process includes material coating, exposure, and development, and the patterning process is a conventional mature preparation process and is not described in detail.
The auxiliary light emitting layer 40 is disposed on the supporting structure 103 and covers the supporting structure 103 and the pixel defining layer 30, that is, the pixel defining layer 30 and the supporting structure 103 are disposed in the auxiliary light emitting layer 40 and disposed near one side of the substrate 10.
The organic light emitting layer 50 is disposed on the auxiliary light emitting layer 40 and between the adjacent pixel defining layers 30.
The second electrode layer 60 is disposed on the organic light emitting material layer 50 and extends to cover the auxiliary light emitting layer 40. The second electrode layer 60 may be a transparent ITO (Indium Tin Oxide) electrode or a metal electrode. Wherein the metal electrode may be made of at least one of a metal, an alloy, a conductive metal oxide, or a conductive polymer. In this embodiment, the second electrode layer 60 is a cathode and is a metal electrode.
In the embodiment of the present application, when a voltage is applied to the organic light emitting layer 50 by the first electrode layer 20 and the second electrode layer 60, the organic light emitting layer 50 emits light. The auxiliary light-emitting layer 40 is used for assisting the organic light-emitting layer 50 to emit light, so that the organic light-emitting layer 50 can emit light when a small driving voltage is applied to the first electrode layer 20 and the second electrode layer 60, and the light-emitting efficiency of the organic light-emitting layer 50 can be improved. It is understood that in other embodiments, the auxiliary light emitting layer 40 may also be omitted.
Referring to fig. 3, in an embodiment, the display panel 100 further includes an organic passivation layer 70. The organic protection layer 70 is disposed on the second electrode layer 60. The material of the organic protection layer 70 is a transparent organic insulating material. In this embodiment, the organic insulating material is a polyimide series material. It is understood that the polyimide family of materials can be polyimides and their derivatives. It can be understood that the polyimide series material has excellent heat resistance, wear resistance, elasticity, flexibility, and small molding shrinkage, so as to release stress to prevent the flexible display panel 100 from being damaged by mechanical abrasion due to multiple folding and bumping.
In other embodiments, the organic insulating material may further include other resin or rubber-like compounds having good stress properties, such as, but not limited to, photoresist, benzocyclobutene, polymethyl methacrylate, Polyethylene (PE), or Polyethylene terephthalate (PET).
Optionally, in an embodiment, the organic protection layer 70 is a polyimide film.
Referring to fig. 4, in the process of manufacturing the display panel 100, after the auxiliary light emitting layer 40 is manufactured, the organic light emitting layer 50 is deposited on the auxiliary light emitting layer 40, and the mask 200 is used to perform evaporation on the organic light emitting layer 50. Referring to fig. 5, in the embodiment of the present disclosure, at least one groove 104 is formed on a side of the supporting structure 103 opposite to the pixel defining layer 30, and a width W of the groove gradually decreases along a direction from the supporting structure 103 to the pixel defining layer 30. In the embodiment of the present application, since the width W of the groove 104 is gradually reduced along the direction from the supporting structure 103 to the pixel defining layer 30, so that the included angle θ between the bottom of the groove 104 and the sidewall is an obtuse angle, and further, when depositing the auxiliary light emitting layer 40, the auxiliary light emitting layer 40 can be smoothly transited at the corner of the groove 104, and cannot be broken due to the turn at the corner, thereby ensuring the film quality of the auxiliary light emitting layer 40.
Referring to fig. 6, if a foreign substance 201 exists in the mask 200, the foreign substance 201 protruding from the surface of the mask 200 extrudes the auxiliary light-emitting layer 40, so that the surface of the auxiliary light-emitting layer 40 is uneven, however, in the embodiment of the present application, since at least one groove 104 is formed on the side of the supporting structure 103 facing away from the pixel defining layer 30, the contact area between the supporting structure 103 and the mask 200 is reduced, and further, the damage of the mask 200 to the auxiliary light-emitting layer 40 is reduced. In addition, due to the existence of the groove 104, the film layer which is excessive due to scratching or extrusion deformation of the auxiliary light-emitting layer 40 can be laterally transferred, namely, enter the groove 104, so that the excessive film layer is prevented from being too high in the normal film layer, the subsequent film packaging effect can be ensured, and the effective reliability of packaging is ensured.
Referring again to fig. 5, in one embodiment, the depth H of the recess 104 is greater than half D/2 of the thickness D of the support structure 103 and less than the thickness D of the support structure 103, i.e., D/2< H < D. In this way, it is ensured that excess film can enter the recess 104.
Referring to fig. 7A, in some embodiments, the supporting structure 103 is formed with a plurality of grooves 104, and the grooves 104 are spaced apart from each other and are disposed in parallel.
In some embodiments, as shown in fig. 7B and 7C, the plurality of grooves 104 may also be disposed intersecting. Specifically, the plurality of grooves 104 intersect and are vertically disposed. Of course, the arrangement of the plurality of grooves 104 is not limited thereto, and may be determined according to specific design conditions.
Fig. 8 is a schematic block diagram of a display device 300 according to an embodiment of the invention. The display device 300 includes the display panel 100 of the previous embodiment.
The display device 300 may be a flexible display device or a non-flexible display device. Preferably, the display device 300 is a flexible display device, for example, a product or a component having a display function, such as a mobile phone and a tablet computer.
Referring to fig. 9, an embodiment of the present application further provides a method for manufacturing a display panel. The manufacturing method of the display panel comprises the following steps.
Step S101, providing a substrate 10 and sequentially depositing a first electrode layer 20, a pixel defining layer 30 and a supporting structure 103 on the substrate 10. At least one groove 104 is formed on a side of the supporting structure 103 facing away from the pixel defining layer 30.
In one embodiment, the depth H of the recess 104 is greater than half D/2 of the thickness D of the support structure 103 and less than the thickness D of the support structure 103, i.e. D/2< H < D. In this way, it is ensured that excess film can enter the recess 104.
In some embodiments, the supporting structure 103 defines a plurality of grooves 104, and the grooves 104 are spaced apart from each other and arranged in parallel. In other embodiments, the plurality of grooves 104 may also be disposed in an intersecting relationship. Specifically, the plurality of grooves 104 intersect and are vertically disposed.
Step S102, depositing an organic light emitting layer 50 between the pixel defining layers 30, and performing evaporation on the organic light emitting layer 50 by using a mask 200.
Step S103, optically detecting the evaporated substrate 10 to determine a damage position of the support structure 103.
And step S104, repairing the damaged position by adopting laser irradiation.
Specifically, repairing the damaged site by laser irradiation includes: and irradiating the damaged position from one side of the substrate 10 by using laser with specific energy, so that the damaged position is heated and decomposed, and the effect of repairing the damaged position is achieved.
In the display panel manufacturing method provided by the embodiment of the application, since the supporting structure 103 is provided with the at least one groove 104 on the side back to the pixel defining layer 30, the contact area between the supporting structure 103 and the mask plate 200 is reduced, and further, the damage of the mask plate 200 to the supporting structure is reduced. In addition, due to the existence of the groove 104, the extra film layers of the supporting structure 103 caused by scratching or extrusion deformation can be laterally transferred, so that the extra film layers are prevented from being too high in the normal film layers, the supporting structure 103 can be covered by the subsequent film packaging with a certain thickness, and the packaging efficiency and reliability are guaranteed.
Further, the damaged position of the supporting structure 103 is determined through optical detection, and the damaged position is repaired through laser irradiation, so that the damaged position is heated and decomposed, the effect of repairing the damaged position is achieved, the reliability of subsequent packaging is further improved, and the display effect of the display panel 100 is further improved.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and embodiments of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (9)
- A display panel, comprising:a substrate;a first electrode layer disposed on the substrate;the pixel defining layers are arranged on the first electrode layer at intervals;the supporting structure is arranged on the pixel defining layer;the organic light-emitting layer is arranged on the first electrode layer and positioned between the adjacent pixel defining layers; andthe second electrode layer is arranged on the organic light-emitting layer and extends to cover the support structure;at least one groove is formed in one side, back to the pixel definition layer, of the supporting structure, and the width of the groove is gradually reduced along the direction from the supporting structure to the pixel definition layer.
- The display panel of claim 1, wherein a depth of the groove is greater than half a thickness of the support structure and less than the thickness of the support structure.
- The display panel according to claim 1 or 2, wherein the supporting structure is provided with a plurality of grooves, and the plurality of grooves are spaced from each other and arranged in parallel, or the plurality of grooves are arranged in an intersecting manner.
- The display panel according to claim 1, further comprising an auxiliary light emitting layer; the auxiliary light-emitting layer is arranged on the supporting structure and coats the supporting structure and the pixel defining layer; the organic light emitting layer is arranged on the auxiliary light emitting layer and is positioned between the adjacent pixel defining layers.
- The display panel according to claim 1, wherein the first electrode layer is an anode, and the first electrode layer is a transparent ITO electrode; the second electrode layer is a cathode, and the second electrode layer is a metal electrode.
- The display panel of claim 1, further comprising an organic protective layer disposed on the second electrode layer; the organic protective layer is made of a transparent organic insulating material.
- A display device characterized by comprising the display panel according to any one of claims 1 to 6.
- A method for manufacturing a display panel is characterized by comprising the following steps:providing a substrate and depositing a first electrode layer, a pixel definition layer and a support structure on the substrate in sequence; wherein, one side of the supporting structure, which is back to the pixel defining layer, is provided with at least one groove;depositing organic light-emitting layers between the pixel defining layers, and evaporating the organic light-emitting layers by using a mask plate;carrying out optical detection on the evaporated substrate to determine the damage position of the support structure;and repairing the damaged position by adopting laser irradiation.
- The method of claim 8, wherein the repairing the damage location with laser irradiation comprises: irradiating the damage position from one side of the substrate by using laser with specific energy.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2019/098360 WO2021016859A1 (en) | 2019-07-30 | 2019-07-30 | Display panel, display device, and manufacturing method for display panel |
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| Publication Number | Publication Date |
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| CN113424333A true CN113424333A (en) | 2021-09-21 |
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| CN201980090109.XA Pending CN113424333A (en) | 2019-07-30 | 2019-07-30 | Display panel, display device and manufacturing method of display panel |
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| WO (1) | WO2021016859A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116648095A (en) * | 2023-07-24 | 2023-08-25 | 合肥维信诺科技有限公司 | display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113193016A (en) * | 2021-04-14 | 2021-07-30 | 深圳市华星光电半导体显示技术有限公司 | Array substrate and display panel |
| CN114388721B (en) * | 2021-12-31 | 2023-12-12 | 昆山梦显电子科技有限公司 | Silicon-based OLED display substrate |
| CN218918892U (en) * | 2022-10-28 | 2023-04-25 | 华为技术有限公司 | LED display panel, display screen and electronic equipment |
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| CN109166883A (en) * | 2018-08-02 | 2019-01-08 | 云谷（固安）科技有限公司 | Display panel and preparation method thereof and display device |
| CN208622774U (en) * | 2018-08-03 | 2019-03-19 | 云谷（固安）科技有限公司 | Display screen and display device |
| CN109148522A (en) * | 2018-08-10 | 2019-01-04 | 上海天马微电子有限公司 | Organic light emitting display panel, the production method of display panel and display device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116648095A (en) * | 2023-07-24 | 2023-08-25 | 合肥维信诺科技有限公司 | display panel |
| CN116648095B (en) * | 2023-07-24 | 2023-12-22 | 合肥维信诺科技有限公司 | display panel |
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|---|---|
| WO2021016859A1 (en) | 2021-02-04 |
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