CN116600599A - OLED display panel and display device - Google Patents
OLED display panel and display device Download PDFInfo
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- CN116600599A CN116600599A CN202310608966.2A CN202310608966A CN116600599A CN 116600599 A CN116600599 A CN 116600599A CN 202310608966 A CN202310608966 A CN 202310608966A CN 116600599 A CN116600599 A CN 116600599A
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- 230000005611 electricity Effects 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 26
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- 230000005525 hole transport Effects 0.000 claims description 8
- 239000010410 layer Substances 0.000 description 171
- 238000010586 diagram Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 6
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 5
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
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- 230000005684 electric field Effects 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000025 interference lithography Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
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- 239000004973 liquid crystal related substance Substances 0.000 description 2
- SJCKRGFTWFGHGZ-UHFFFAOYSA-N magnesium silver Chemical compound [Mg].[Ag] SJCKRGFTWFGHGZ-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/126—Shielding, e.g. light-blocking means over the TFTs
-
- 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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application discloses an OLED display panel and a display device, and relates to the technical field of display. The OLED display panel comprises a plurality of anodes, a light-emitting layer, a driving backboard and at least one shielding electrode. The anodes are arranged on the driving backboard and used for receiving a first voltage provided by the driving backboard. The shielding is electrically arranged on the driving backboard. The shielding electrode is used for receiving a second voltage provided by the driving backboard. The common layer in the light-emitting layer is arranged on the shielding electrode and is used for providing holes for the light-emitting layer. In this scheme, the driving back plate of the OLED display panel supplies a first voltage to the anode, and the anode is connected to the positive electrode and forms holes in the common layer in the light emitting layer according to the positive electrode. The shielding electrode receives the driving backboard to provide negative electricity. Therefore, the shielding electrode attracts holes transversely transmitted in the common layer, so that the holes cannot reach other pixel areas, and the problem of transverse crosstalk between adjacent pixel areas can be greatly reduced or eliminated.
Description
Technical Field
The application relates to the technical field of display, in particular to an OLED display panel and a display device.
Background
The Organic Light-Emitting Diode (OLED) display technology is most different from the liquid crystal display (Liquid Crystal Display, LCD) technology in that the LCD requires a backlight for display Light emission, whereas the OLED does not require a backlight. The OLED adopts a structure in which a driving back plate and a light emitting layer are combined, and the light emitting layer generally mainly includes an organic light emitting layer (EmittingLayer, EML), an electron injection layer (ElectronInjectLayer, EIL), an electron transport layer (ElectronTransportLayer, ETL), a hole injection layer (HoleInjectLayer, HIL) and a hole transport layer (HoleTransportLayer, HTL), and EIL and HIL are disposed on upper and lower sides of the EML, respectively. The specific luminous principle is as follows: under the drive of voltage, electrons and holes are respectively injected into the ETL and the HTL from the cathode and the anode and then migrate to the EML, and excitons are formed to excite luminescent molecules, and after radiation, visible light is emitted.
In general, an organic light emitting layer in an OLED display device includes a Red (Red) light emitting layer, a Green (Green) light emitting layer, and a Blue (Blue) light emitting layer, and HILs under the three light emitting layers generally form a common layer in a tandem manner. However, since the common layer is entirely penetrated, a lateral leakage current is generated in the current, and the adjacent pixels are lit up, which causes a lateral crosstalk.
Disclosure of Invention
The application provides an OLED display panel and a display device, which are used for reducing the problem of transverse crosstalk between adjacent pixels and preventing display from being stolen.
The technical scheme is as follows:
in a first aspect, an OLED display panel is provided, wherein the OLED display panel is divided into a plurality of pixel regions and a non-pixel region, and the OLED display panel includes a plurality of anodes, a light-emitting layer, a driving back plate, and at least one shielding electrode. The anodes are arranged on the driving backboard and positioned in different pixel areas, and the anodes are used for receiving the first voltage provided by the driving backboard. At least one shielding electrode is arranged on the driving backboard and positioned in the non-pixel area, and the shielding electrode is used for receiving negative electricity provided by the driving backboard. The common layer in the light-emitting layer is arranged on the shielding electrode. An isolation layer is arranged between the at least one shielding electrode and the common layer, and is used for isolating the common layer and the at least one shielding electrode. The common layer is used for providing holes for the light-emitting layer.
In the OLED display panel provided by the application, the driving backboard of the OLED display panel provides a first voltage for the anode in each pixel area, and the anode is connected with positive electricity and forms a hole in the common layer in the light-emitting layer according to the positive electricity. The shielding electrode receives the second voltage provided by the driving backboard, and has electronegativity because the second voltage is electronegative. The shielding electrode attracts holes transversely transmitted in the common layer through the isolating layer under the condition of not being in direct contact with the common layer, so that the holes can not reach other pixel areas, and the transverse crosstalk problem between adjacent pixel areas can be greatly reduced or eliminated.
In one possible implementation of the application, the pixel area is used for a light emitting display. Specifically, the anode in the pixel region receives the first voltage provided by the driving backboard, and a hole is formed in the common layer in the light-emitting layer, and the hole is used for combining with an electron in the light-emitting layer to form an exciton, so that the light-emitting layer emits light.
In one possible implementation of the application, the anode is a metal-bonded indium tin oxide for connecting the driving backplate and the light emitting layer.
In one possible implementation of the application, the anode and the shielding electrode are in the same layer. Thus, the layer process is not additionally increased, and the manufacturing cost is reduced.
In one possible implementation of the application, the material of the shielding electrode is the same as the material of the anode. For example, the material of the shielding electrode may be ITO and Ag combined.
In one possible implementation of the application, an insulating layer is provided between two adjacent anodes, and the shielding electrode is provided on the insulating layer. This reduces the effect of negative charges in the shielding electrode on positive charges in the anode, due to the addition of an insulating layer between the shielding electrode and the anode.
In one possible implementation of the application, in case the shielding electrode is one, the shielding electrode is a grid electrode. Orthographic projection of the anode on the drive back plate is within orthographic projection of the grid of grid-like electrodes on the drive back plate.
In one possible implementation of the present application, in the case where the shielding electrode is plural, the plural shielding electrodes are disposed at intervals from each other. It will be appreciated that the shield electrodes are not connected.
In one possible implementation of the present application, the shielding electrode may adjust the magnitude of the electric field of the shielding electrode by changing the thickness, material, width, thereby changing its ability to attract holes in the common layer.
In one possible implementation manner of the present application, the light emitting layer sequentially includes, from bottom to top: a common layer, a hole transport layer, an organic light emitting layer, an electron transport layer, and an electron injection layer. Among them, the common layer is introduced to increase interfacial charge injection, and polycarbonate and the like are commonly used materials. The hole transport layer is mainly made of tri-aromatic amine compounds and the like, and has excellent surface stability. Organic light-emitting layer main material organic light-emitting material such as 8-hydroxyquinoline aluminum and the like. The electron transport layer is mainly made of Alq3 and the like. The material of the electron injection layer mainly comprises lithium fluoride, aluminum oxide and the like.
In one possible implementation of the present application, the organic light emitting layer includes a red light emitting layer, a green light emitting layer, and a blue light emitting layer. The red light emitting layer, the green light emitting layer, and the blue light emitting layer are sequentially arranged in the horizontal direction in the organic light emitting layer.
In one possible implementation of the present application, the display panel further includes a cathode layer disposed over the light emitting layer. The cathode layer is used for receiving a third voltage provided by the driving backboard, and the third voltage is used for providing electrons for the light-emitting layer. Wherein the cathode layer is made of silver-magnesium alloy and other metal materials.
In a second aspect, an embodiment of the present application provides a display device, where the display device includes the display panel according to the first aspect.
In one possible implementation of the present application, the display device further includes a thin film encapsulation layer for encapsulating the cathode layer. The material of the thin film encapsulation layer is selected from silicon nitride and/or resin, or a silicon nitride lamination is adopted.
In a third aspect, an embodiment of the present application provides an electronic device, including the display apparatus according to the second aspect.
It will be appreciated that the advantages of the second and third aspects may be referred to in the description of the first aspect, and will not be described in detail herein.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an OLED display panel according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an OLED display panel with single color display according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a design of a shielding electrode and an anode according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of another design of a shielding electrode and an anode according to an embodiment of the present application;
fig. 5 is a schematic layout diagram of shielding electrodes in two OLED display panels according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of another OLED display panel according to an embodiment of the present application.
Detailed Description
In order to clearly describe the technical solution of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect. For example, the first shielding electrode and the second shielding electrode are merely for distinguishing different components, and are not limited in order. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.
In the present application, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
In the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.
Before explaining the embodiment of the present application in detail, an application scenario of the embodiment of the present application is described.
In the OLED display technology, because the common layer of the OLED display screen is through, when the OLED display screen is lightened to display a single-color picture, current can be caused to flow transversely, and the adjacent pixels with other colors are lightened to cause single-color impurity, color coordinates deviate from the original target values, and the picture has color distortion to a certain extent. In particular, in the blue light-emitting layer, since the light-emitting efficiency of the blue light-emitting layer is low, the luminance voltage of the blue light-emitting layer is higher than that of the red light-emitting layer/the green light-emitting layer, and thus the phenomenon of lateral crosstalk is more remarkable when displaying blue light.
In the prior art, it is common to replace the material of the hole injection layer (Hole Inject Layer, HIL) with poor conductivity or to break the common layer by some process. However, the above solutions all increase the driving voltage of the OLED device while reducing the light emitting efficiency of the device.
Therefore, the application provides an OLED display panel, wherein a shielding electrode is added below an OLED display common layer, and the shielding electrode is positioned between anodes corresponding to red, green and blue pixels respectively. Weak electronegativity is applied to the shielding electrode to attract holes laterally transported in the common layer, thereby reducing the lateral transport of holes and eliminating lateral crosstalk between adjacent pixels. The arrangement of the shielding electrode does not involve the treatment of the light-emitting layer, can effectively reduce the difficulty of scheme realization, and has operability and mass production. Wherein, the shielding electrode can also adjust the capacity of attracting holes by changing parameters such as thickness, material, width and the like.
The following explains in detail an OLED display panel and a display device provided in the embodiments of the present application.
Fig. 1 provides a schematic structural diagram of an OLED display panel, which is divided into a plurality of pixel regions 10 and non-pixel regions 20. The display panel includes a plurality of anodes 101, a light emitting layer 102, a driving back plate 103, and at least one shielding electrode 104. The anodes 101 are disposed on the driving back plate 103 and located in different pixel areas 10, and the anodes 101 are configured to receive a first voltage provided by the driving back plate 103. At least one shielding electrode 104 is disposed on the driving back plate 103 and is disposed in the non-pixel region 20, and the shielding electrode 104 is configured to receive the negative power provided by the driving back plate 103. The common layer 1021 in the light-emitting layer 102 is provided over the shielding electrode 104. An isolation layer 105 is disposed between the at least one shielding electrode 104 and the common layer 1021, and the isolation layer 105 is used to isolate the common layer 1021 from the at least one shielding electrode 104. The common layer 1021 is used to provide holes for the light emitting layer 102.
Wherein the pixel areas 10 are for light emitting display, each pixel area 10 comprises at least one anode 101. Specifically, the anode 101 in the pixel region 10 receives the first voltage provided by the driving back plate 103, and forms holes in the common layer 1021 in the light emitting layer 102, and the holes are used for combining with electrons in the light emitting layer 102 to form excitons, so that the light emitting layer 102 emits light.
For example, the anode 101 is metal-bonded Indium Tin Oxide (ITO), such as silver (Ag) and ITO, for connecting the driving back plate 103 and the light emitting layer 102.
The isolation layer 105 is disposed between the shielding electrode 104 and the common layer 1021, and it is understood that electrical connection between the shielding electrode 104 and the common layer 1021 is not required, in other words, the common layer 1021 is disposed on the isolation layer 105, and the isolation layer 105 is disposed on the shielding electrode 104.
Note that the common layer 1021 is for increasing interfacial charge (such as hole injection), and a material commonly used for the common layer 1021 is polycarbonate (CuPc).
For example, the spacer layer 105 functions so that the common layer 1021 and the shield electrode 104 are not in direct contact. The isolation layer 105 may be a pixel defining layer (PixelDefineLayer, PDL) or an insulating layer, which is not limited in the embodiment of the present application. Among them, the PDL material is typically photosensitive polyimide (Photosensitive Polyimide Photoresist, PSPI) or the like, and the insulating layer material is typically lithium fluoride (LiF), aluminum oxide (Al 2O 3), or the like.
In one possible embodiment, in an OLED display panel, every three pixel regions 10 constitute one pixel. And the pixel region 10 in each pixel emits red light, green light, and blue light, respectively. The driving back plane 103 may realize a single color display or a multi-color display of the OLED display panel by supplying the first voltage to the anode 101 in the different pixel regions 10.
For example, by driving the back plate 103 to supply the first voltage to the blue organic light emitting layer in each pixel, blue light monochrome picture display can be realized. By driving the back plate 103 to supply a first voltage to at least any two organic light emitting layers (e.g., a red organic light emitting layer and a green organic light emitting layer) in each pixel, multicolor picture display can be realized.
In one possible embodiment, fig. 2 is a schematic diagram of an OLED display panel with a single color display according to an embodiment of the present application. As shown in fig. 2, a first anode electrode 1011, a second anode electrode 1012, and a third anode electrode 1013 are respectively disposed in three pixel regions 10, and a first shielding electrode 1041 and a second shielding electrode 1042 are disposed in a non-pixel region 20 between adjacent pixel regions 10. The driving back plate 103 provides a first voltage to the first anode 1011, so that the pixel region where the first anode 1011 is located emits light, and at this time, holes in the common layer may be transported to other pixel regions 10. And the first shielding electrode 1041 and the second shielding electrode 1042 receive the negative electricity provided by the driving back plate 103, and can attract the holes in the common layer 1021, so as to weaken the transverse transmission of the holes in the common layer 1021.
In the above embodiment, the driving back plane 103 of the OLED display panel supplies the first voltage to the anode 101 in each pixel region 10, and the anode 101 is connected to positive electricity and forms holes in the common layer 1021 in the light emitting layer 102 according to the positive electricity. The shielding electrode 104 receives the negative electricity provided by the driving back plate 103, and thus the shielding electrode 104 has electronegativity. By the isolation layer 105, the weak electric field formed by the shielding electrode 104 attracts holes transported laterally in the common layer 1021 without directly contacting the common layer 1021, so that the holes do not reach other pixel regions 10, and the problem of lateral crosstalk between adjacent pixel regions 10 can be greatly reduced or eliminated.
In an embodiment of the present application, the anode 101 and the shielding electrode 104 are both disposed on the driving back plate 103. The anode 101 is located in the pixel region 10, and the shielding electrode 104 is located in the non-pixel region 20. The layers of the anode 101 and the shielding electrode 104 are stacked in two ways, one is that the shielding electrode 104 and the anode 101 are in the same layer, and the other is that the shielding electrode 104 and the anode 101 are in different layers.
Mode one: the shielding electrode 104 is in the same layer as the anode 101.
As an example, as shown in fig. 3, the anode 101 is in the same layer as the shielding electrode 104. Wherein, different circuits are manufactured on the driving backboard 103 through a mask plate, and the shielding electrode 104 and the anode 101 are manufactured on the same layer. Thus, the layer process is not additionally increased, and the manufacturing cost is reduced.
Wherein the material of the shielding electrode 104 is the same as the material of the anode 101. For example, the material of the shielding electrode 104 may be ITO and Ag combined.
Mode two: the shielding electrode 104 is a different layer from the anode 101.
As an example, as shown in fig. 4, the anode 101 and the shielding electrode 104 are in different layers. For example, a shielding electrode 104 is provided over the anode 101. Wherein an insulating layer 106 is provided between adjacent two anodes 101, and a shielding electrode 104 is provided over the insulating layer 106. With the insulating layer 106 between the shielding electrode 104 and the anode 101, the influence of negative electricity in the shielding electrode 104 on positive electricity in the anode 101 is reduced. The material of the insulating layer 106 is typically lithium fluoride (LiF), aluminum oxide (Al 2O 3), or the like.
For example, in the case where the display panel is used for a display product having a large pixel density unit (PPI), since the pixel pitch is small, the negative electrode in the shielding electrode 104 has a large influence on the positive electrode in the anode 101, and thus the influence of the shielding electrode 104 on the anode 101 can be effectively reduced after the insulating layer 106 is provided.
In the embodiment of the present application, the number of the shielding electrodes 104 may be one or more. It will be appreciated that when the shielding electrode 104 is one, all the shielding electrodes 104 between two adjacent pixel regions 10 are connected.
In one possible implementation of the present application, where the shielding electrode 104 is one, the shielding electrode 104 is a grid electrode. Orthographic projection of anode 101 on drive back plate 103 is within orthographic projection of the grid of grid-like electrodes on drive back plate 103.
As an example, fig. 5 (a) is a schematic plan view of an OLED display panel according to an embodiment of the present application. As shown in fig. 5 (a), the arrangement of the pixel regions 10 is one arrangement in the OLED display panel. Taking one pixel as an example, red, green and blue pixels are respectively disposed at the position of the anode 101, wherein the pixel on the left side is a blue pixel, the pixel on the right side is a red pixel, and the pixel on the lower right side is a green pixel. Outside the pixel region 10 where the pixels are located is a non-pixel region 20, and the shielding electrodes 104 located in the non-pixel region 20 are communicated to form a grid-like electrode.
It should be noted that the pixel arrangement manner in the OLED display panel may be other arrangement manners, and the embodiment of the application is not limited.
In one possible implementation of the present application, in the case where the shielding electrode 104 is plural, the plural shielding electrodes 104 are disposed at intervals from each other.
It is understood that the shield electrodes 104 are not connected to each other.
As an example, as shown in fig. 5 (b), there are two shielding electrodes 104 located in the non-pixel region 20, a first shielding electrode 1041 and a second shielding electrode 1042, respectively. The number of shielding electrodes 104 is not limited in the embodiment of the present application.
In an embodiment of the present application, the shielding electrode 104 may adjust the magnitude of the electric field of the shielding electrode 104 by changing the thickness, material, width, thereby changing its ability to attract holes in the common layer 1021.
If the shielding electrode 104 and the anode 101 are disposed in the same layer, as in the first embodiment, the thickness of the shielding electrode is the same as that of the anode, for example, 1200 angstroms. If the shielding electrode 104 and the anode 101 are disposed on different layers, as in the second embodiment, the thickness of the shielding electrode 104 is 1400-1600 angstroms, such as 1500 angstroms. The shield electrode 104 has a width of at least 5 microns.
For example, the thicker the thickness of the shielding electrode 104, the greater the ability to attract holes, with the second voltage level unchanged. Alternatively, the thinner the shield electrode 104, the stronger the hole-attracting ability, and the application is not limited.
Fig. 6 is a schematic structural diagram of an OLED display panel according to an embodiment of the present application, and as shown in fig. 6, a light emitting layer 102 includes, in order from bottom to top: a common layer 1021, a hole transport layer 1022, an organic light emitting layer 1023, an electron transport layer 1024, and an electron injection layer 1025.
It is understood that each of the functional layers of the anode 101, the light emitting layer 102, the driving back plate 103, the shielding electrode 104, and the light emitting layer 102 includes two surfaces, such as an upper surface and a lower surface. In one embodiment of the present application, the upper surface of the common layer 1021 is in contact with the lower surface of the hole transport layer 1022. The upper surface of the hole transport layer 1022 is in contact with the lower surface of the organic light emitting layer 1023. The upper surface of the organic light emitting layer 1023 is in contact with the lower surface of the electron transport layer 1024. The upper surface of the electron transport layer 1024 is in contact with the lower surface of the electron injection layer 1025.
Among them, the common layer 1021 (i.e., hole injection layer) is introduced to increase interfacial charge injection, and a material commonly used is polycarbonate (CuPc).
The hole transport layer 1022 is mainly made of a triarylamine compound, and has excellent surface stability.
The organic light emitting layer 1023 is mainly made of an organic light emitting material such as 8-hydroxyquinoline aluminum (Alq 3) or the like.
The electron transport layer 1024 is mainly made of Alq3 or the like.
The material of the electron injection layer 1025 mainly includes lithium fluoride (LiF), aluminum oxide (Al 2O 3), and the like.
The kind of the material of each functional layer is not limited in the present application.
In one possible implementation of the present application, the organic light emitting layer 1023 includes a red light emitting layer, a green light emitting layer, and a blue light emitting layer, which are sequentially arranged in the horizontal direction in the organic light emitting layer. Respectively correspond to the red light pixel, the green light pixel and the blue light pixel.
In one possible implementation of the present application, the OLED display panel further includes a cathode layer 107, as shown in fig. 6. The cathode layer 107 is disposed on the light emitting layer 102, and the cathode layer 107 is configured to receive a third voltage provided by the driving back plane 103, where the third voltage is configured to provide electrons to the light emitting layer 102.
Wherein the upper surface of the electron injection layer 1025 is in contact with the lower surface of the cathode layer 107. The material of the cathode layer 107 is a metal material such as silver magnesium alloy.
The embodiment of the application provides a display device, which comprises the OLED display panel, wherein the display panel further comprises a thin film packaging layer for packaging the cathode layer 107. The material of the thin film encapsulation layer is selected from silicon nitride and/or resin, or a silicon nitride lamination is adopted.
The embodiment of the application provides electronic equipment, which comprises a display screen, wherein the display screen comprises the display device in the embodiment.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided by the present application, it should be understood that the disclosed apparatus/computer device and method may be implemented in other manners. For example, the apparatus/computer device embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. An OLED display panel is characterized by being divided into a plurality of pixel areas and a non-pixel area, and comprises a plurality of anodes, a light-emitting layer, a driving backboard and at least one shielding electrode;
the anodes are arranged on the driving backboard and positioned in different pixel areas, and the anodes are used for receiving first voltage provided by the driving backboard;
at least one shielding electrode is arranged on the driving backboard and is positioned in the non-pixel area, and the shielding electrode is used for receiving negative electricity provided by the driving backboard;
the common layer in the light-emitting layer is arranged on the shielding electrode, an isolation layer is arranged between at least one shielding electrode and the common layer, the isolation layer is used for isolating the common layer and at least one shielding electrode, and the common layer is used for providing holes for the light-emitting layer.
2. The OLED display panel of claim 1, wherein the anode is in the same layer as the shielding electrode.
3. The OLED display panel according to claim 1, wherein the shielding electrode is made of the same material as the anode.
4. The OLED display panel according to claim 1, wherein an insulating layer is disposed between two adjacent anodes, and the shielding electrode is disposed on the insulating layer.
5. The OLED display panel according to any one of claims 1 to 4, wherein in the case where the shielding electrode is one, the shielding electrode is a mesh electrode;
orthographic projection of the anode on the drive backboard is within orthographic projection of the grid-like electrode on the drive backboard.
6. The OLED display panel claimed in any one of claims 1 to 4, wherein in the case where the shielding electrode is plural, the plural shielding electrodes are disposed at intervals from each other.
7. The OLED display panel according to any one of claims 1-4, wherein the light-emitting layer comprises, in order from bottom to top: the organic light-emitting device comprises a common layer, a hole transport layer, an organic light-emitting layer, an electron transport layer and an electron injection layer.
8. The OLED display panel according to claim 7, wherein the organic light-emitting layer includes a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer, the red light-emitting layer, the green light-emitting layer, and the blue light-emitting layer being sequentially arranged in a horizontal direction in the organic light-emitting layer.
9. The OLED display panel of claim 8, further comprising a cathode layer,
the cathode layer is arranged on the light-emitting layer, and is used for receiving a third voltage provided by the driving backboard, and the third voltage is used for providing electrons for the light-emitting layer.
10. A display device, characterized in that it comprises an OLED display panel according to any one of claims 1 to 9.
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| CN202310608966.2A CN116600599A (en) | 2023-05-26 | 2023-05-26 | OLED display panel and display device |
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| CN202310608966.2A CN116600599A (en) | 2023-05-26 | 2023-05-26 | OLED display panel and display device |
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| US20220393131A1 (en) * | 2020-06-22 | 2022-12-08 | Boe Technology Group Co., Ltd. | Organic light-emitting display panel and preparation method therefor, and display apparatus |
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| CN110190105A (en) * | 2019-06-11 | 2019-08-30 | 京东方科技集团股份有限公司 | A kind of display panel and its drive control method, display device |
| US20210202632A1 (en) * | 2019-12-31 | 2021-07-01 | Lg Display Co., Ltd. | Light emitting display device |
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