WO2021190161A1 - 显示装置、显示面板及其制造方法 - Google Patents

显示装置、显示面板及其制造方法 Download PDF

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Publication number
WO2021190161A1
WO2021190161A1 PCT/CN2021/074943 CN2021074943W WO2021190161A1 WO 2021190161 A1 WO2021190161 A1 WO 2021190161A1 CN 2021074943 W CN2021074943 W CN 2021074943W WO 2021190161 A1 WO2021190161 A1 WO 2021190161A1
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WO
WIPO (PCT)
Prior art keywords
layer
electrode
display panel
backplane
area
Prior art date
Application number
PCT/CN2021/074943
Other languages
English (en)
French (fr)
Inventor
王宇
黄冠达
王青
董永发
杨超
李世鹏
童慧
施尚权
袁雄
李东升
申晓斌
Original Assignee
京东方科技集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP21775976.0A priority Critical patent/EP4131454A4/en
Priority to CN202180002963.3A priority patent/CN113748533B/zh
Priority to US17/432,416 priority patent/US20220344419A1/en
Priority to CN202410172091.0A priority patent/CN118076150A/zh
Priority to BR112022019355A priority patent/BR112022019355A2/pt
Priority to JP2021571439A priority patent/JP2023518623A/ja
Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to KR1020227000207A priority patent/KR20220158671A/ko
Priority to AU2021244430A priority patent/AU2021244430B2/en
Priority to MX2022012026A priority patent/MX2022012026A/es
Publication of WO2021190161A1 publication Critical patent/WO2021190161A1/zh
Priority to US17/511,660 priority patent/US20220052136A1/en
Priority to AU2024202417A priority patent/AU2024202417A1/en

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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
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being 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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/1201—Manufacture or treatment
    • 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
    • H10K59/122—Pixel-defining structures or layers, e.g. banks
    • 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
    • H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
    • 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
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • 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
    • H10K59/805—Electrodes
    • H10K59/8051—Anodes
    • H10K59/80515—Anodes characterised by their shape
    • 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
    • H10K59/805—Electrodes
    • H10K59/8052—Cathodes
    • H10K59/80521—Cathodes characterised by their shape
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/351—Thickness

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a display device, a display panel, and a manufacturing method of the display panel.
  • OLED Organic Light-Emitting Diode, organic light-emitting diode
  • the light-emitting device usually includes a plurality of OLED light-emitting devices distributed in an array, and each light-emitting device can emit light independently in order to display images.
  • the luminescence stability of the OLED light-emitting device still needs to be improved.
  • the purpose of the present disclosure is to provide a display device, a display panel, and a manufacturing method of the display panel.
  • a display panel including:
  • the first electrode layer is arranged on one side of the driving backplane and includes a plurality of first electrodes distributed in an array, the first electrode includes a flat middle part and an edge part surrounding the middle part; the edge part Comprising a flat part surrounding the middle part and a climbing part connected between the middle part and the flat part, the thickness of the flat part being smaller than the middle part;
  • a light-emitting functional layer at least partially covering the middle part
  • the second electrode covers the light-emitting functional layer and includes a partition and a plurality of smooth portions separated by the partition.
  • the orthographic projection of each smooth portion on the drive backplane corresponds to each location.
  • the partition portion includes a protruding area and a first recessed area connecting the protruding area and the smooth portion, and the first recessed area is close to the drive back plate toward the smooth portion
  • One side is recessed, the protruding area protrudes toward the side of the smooth portion away from the driving backplane, and the orthographic projection of the first recessed area on the driving backplane is at least partially located on the first electrode Outside of the middle part.
  • the orthographic projection of the lowest point of the first recessed area on the driving backplane is located in the middle of the first electrode outside.
  • the first recessed area includes a first side surface connected to the smooth portion and a second side surface connected to the protruding area, the first side surface and The second side surface shrinks in a direction close to the driving back plate.
  • the slope of the first side surface relative to the middle portion is less than or equal to the slope of the second side surface relative to the middle portion.
  • the minimum thickness of the area of the second electrode corresponding to the first side surface is greater than the minimum thickness of the area corresponding to the second side surface.
  • the slope of the first side surface relative to the middle portion is less than 60°; the slope of the second side surface relative to the middle portion is not less than 60° and not greater than 90°.
  • the width of the orthographic projection of the first recessed area on the driving backplane is not greater than 0.2 ⁇ m.
  • the depth of the first recessed area is less than twice the maximum thickness of the second electrode.
  • the maximum thickness of the second electrode is 90 nm, and the depth of the first recessed region is less than 120 nm.
  • the slope of the climbing portion relative to the driving backplane is not less than 30°.
  • the minimum value of the distance between the bottom of the first recessed area and the middle portion of the adjacent first electrode in the direction perpendicular to the driving back plate is not less than the smooth 70% of the total thickness of the part and the light-emitting function layer.
  • the protruding area has a second recessed area recessed toward the driving back plate, and the depth of the second recessed area is smaller than the depth of the first recessed area.
  • the display panel further includes:
  • a leakage cut-off layer which is provided on the same surface of the drive backplane as the first electrode layer, and the light-emitting function layer covers the leakage cut-off layer;
  • the leakage cut-off layer includes a first limiting layer and a second limiting layer sequentially stacked in a direction away from the driving backplane, and both the first limiting layer and the second limiting layer at least partially expose the first electrode And the boundary of the orthographic projection of the second limiting layer on the drive backplane is located outside the middle portion;
  • the lowest point of the first recessed area is located between the middle part and the second limiting layer on the orthographic projection of the drive backplane.
  • the second limiting layer is located within the orthographic projection of the protruding area in the leakage cut-off layer.
  • the display panel further includes:
  • the leakage cut-off layer includes a first limiting layer and a second limiting layer.
  • the first limiting layer and the first electrode layer are arranged on the same surface of the driving backplane and have a plurality of openings.
  • the electrodes are arranged in each of the openings in a one-to-one correspondence; the edge portion of each of the first electrodes and the sidewall of the opening in which they are located form a spacer area exposing the driving backplane;
  • the second confinement layer covers the first confinement layer and the driving backplane located in the spacer region, and at least partially exposes the middle part of the first electrode, and the second confinement layer is in the spacer region and The area corresponding to the edge portion is recessed toward the drive back plate; the thickness of the second limiting layer is smaller than the thickness of the first limiting layer;
  • the light-emitting function layer covers the second defining layer.
  • a display panel including:
  • the first electrode layer is arranged on one side of the driving backplane and includes a plurality of first electrodes distributed in an array; the first electrode includes a flat middle part and an edge part surrounding the middle part; the edge part Comprising a flat part surrounding the middle part and a climbing part connected between the middle part and the flat part, the thickness of the flat part being smaller than the middle part;
  • the leakage cut-off layer is provided on the same surface of the driving backplane as the first electrode layer, and includes a first limiting layer and a second limiting layer stacked in a direction away from the driving backplane, the first The limiting layer is provided with a first opening corresponding to the middle portion of each of the first electrodes, and the second limiting layer is provided with a second opening surrounding the first opening at a position corresponding to the first opening.
  • the second limiting layer is distributed at intervals between the orthographic projection of the drive backplane and the middle part;
  • the first limiting layer is provided with a one-to-one correspondence with a plurality of blind hole structures surrounding each of the first openings
  • the second limiting layer is provided on the surface of the first limiting layer facing away from the driving back plate, and is located outside the annular hole;
  • a light-emitting functional layer at least partially covering the middle part of the leakage cut-off layer and the first electrode;
  • the second electrode covers the light-emitting function layer.
  • the distance between the sidewall of the second opening and the edge of the middle part of the first electrode that it surrounds is not less than the maximum of the middle part of two adjacent first electrodes. 1/5 of the pitch.
  • the distance between the sidewall of the second opening and the edge of the middle portion of the first electrode surrounded by the second opening is not less than 0.2 ⁇ m.
  • the surface of the second limiting layer facing away from the driving backplane and the middle portion facing away from the driving backplane is not less than 25% of the thickness of the light-emitting function layer, and not more than 80% of the thickness of the light-emitting function layer.
  • the side wall of the second opening expands in a direction away from the driving back plate, and the angle between the side wall of the second opening and the middle portion is not less than 65°, and not more than 90°.
  • a groove is provided in an area of the second limiting layer outside the second opening.
  • the width of the groove is smaller than the distance between the middle portions of two adjacent first electrodes.
  • the width of the groove is greater than 0.2 ⁇ m.
  • a display panel including:
  • the first electrode layer is arranged on one side of the driving backplane and includes a plurality of first electrodes distributed in an array, the first electrode includes a flat middle part and an edge part surrounding the middle part; the edge part Comprising a flat part surrounding the middle part and a climbing part connected between the middle part and the flat part, the thickness of the flat part being smaller than the middle part;
  • the leakage cut-off layer includes a first limiting layer and a second limiting layer.
  • the first limiting layer and the first electrode layer are arranged on the same surface of the driving backplane and have a plurality of openings.
  • the electrodes are arranged in each of the openings in a one-to-one correspondence; between the edge portion of each of the first electrodes and the sidewall of the opening where they are located, a spacer area exposing the driving backplane is formed; the second limiting layer Covering the first defining layer and the driving backplane located in the spacer area, and at least partially exposing the middle part of the first electrode, and the second defining layer is in the spacer area and corresponding to the edge part The area is recessed toward the drive backplane;
  • a light-emitting functional layer at least partially covering the middle part of the second limiting layer and the first electrode;
  • the second electrode covers the light-emitting function layer.
  • the thickness of the second confinement layer is smaller than the thickness of the first confinement layer.
  • the driving backplane is provided with an annular groove surrounding the first electrode in the spacer area, and the second limiting layer is recessed to a part of the spacer area. In the annular groove.
  • the driving backplane includes:
  • the driving transistor is arranged on one side of the substrate;
  • the flat layer is provided on the side of the driving transistor away from the substrate; the first electrode layer and the leakage cut-off layer are provided on the surface of the flat layer away from the substrate.
  • the material of the first confinement layer and the second confinement layer are the same.
  • the annular groove coincides with the orthographic projection of the spacer on the driving backplane.
  • the slope of the region of the second electrode corresponding to the sidewall of the opening with respect to the middle portion is not less than 65° and not more than 90°; the second electrode The slope of the region corresponding to the edge portion with respect to the middle portion is less than 60°.
  • the thickness of the second confinement layer is less than 1/5 of the thickness of the first confinement layer.
  • a method of manufacturing a display panel including:
  • a first electrode layer is formed on one side of the driving backplane, the first electrode layer includes a plurality of first electrodes distributed in an array; the first electrode includes a flat middle part and an edge part surrounding the middle part; the edge The part includes a flat part surrounding the middle part and a climbing part connected between the middle part and the flat part, the thickness of the flat part is smaller than the middle part;
  • a leakage cut-off layer is formed on the side of the drive backplane where the first electrode layer is provided, and the leakage cut-off layer includes a first limiting layer and a second limiting layer that are sequentially stacked in a direction away from the drive backplate, so The first limiting layer is provided with first openings corresponding to each of the first electrodes, and the second limiting layer is provided with a second opening surrounding the first opening at a position corresponding to the first opening.
  • the second limiting layer is distributed at intervals between the orthographic projection of the drive backplane and the middle part;
  • the first limiting layer is provided with a one-to-one correspondence with a plurality of blind hole structures surrounding each of the first openings
  • the second limiting layer is provided on the surface of the first limiting layer facing away from the driving back plate, and is located outside the annular hole;
  • a second electrode covering the light-emitting function layer is formed.
  • the first confinement layer and the second confinement layer are formed by the same patterning process.
  • a method of manufacturing a display panel including:
  • a first electrode layer is formed on one side of the driving backplane, the first electrode layer includes a plurality of first electrodes distributed in an array, the first electrode includes a flat middle part and an edge part surrounding the middle part; the edge The part includes a flat part surrounding the middle part and a climbing part connected between the middle part and the flat part, the thickness of the flat part is smaller than the middle part;
  • a first limiting layer is formed on the side of the driving backplane where the first electrode layer is provided, the first limiting layer has a plurality of openings, and each of the first electrodes is provided in each of the openings in a one-to-one correspondence ; Between each of the edge portion and the side wall of the opening where it is located, a spacer area exposing the drive backplane is formed;
  • a second electrode covering the light-emitting function layer is formed.
  • a display device including the display panel described in any one of the above.
  • FIG. 1 is a schematic diagram of an embodiment of the first display panel of the present disclosure.
  • FIG. 2 is an electron micrograph of an embodiment of the first display panel of the present disclosure.
  • FIG. 3 is a schematic diagram of another embodiment of the first display panel of the present disclosure.
  • FIG. 4 is a schematic diagram of the first embodiment of the second display panel of the present disclosure.
  • FIG. 5 is a top view of the first electrode layer in an embodiment of the second display panel of the present disclosure.
  • FIG. 6 is a top view of the leakage cut-off layer in an embodiment of the second display panel of the present disclosure.
  • FIG. 7 is a top view of the leakage interruption layer and the first electrode in an embodiment of the second display panel of the present disclosure.
  • FIG. 8 is a schematic diagram of a second embodiment of the second display panel of the present disclosure.
  • FIG. 9 is a schematic diagram of an embodiment of the third display panel of the present disclosure.
  • FIG. 10 is an electron micrograph of an embodiment of the third display panel of the present disclosure.
  • FIG. 11 is a schematic diagram of an embodiment of a manufacturing method of a display panel of the present disclosure.
  • FIG. 12 is a schematic diagram of an embodiment of a manufacturing method of a display panel of the present disclosure.
  • First recessed area 4121, first side; 4122, second side; 5.
  • Leakage cut-off layer 51, first limiting layer; 511, opening; 52, The second limiting layer; 6.
  • the first encapsulation layer 7.
  • the color film layer 8.
  • the second encapsulation layer 9.
  • the transparent cover plate 9.
  • Climbing part 220, first conductive layer; 221, second conductive layer; 222, third conductive layer; 300, leakage cut-off layer; 301, first limiting layer; 3011, first opening; 3012, annular hole 302, second limiting layer; 3021, second opening; 3022, groove; 400, light-emitting function layer; 401, light-emitting unit layer; 402, charge generation layer; 500, second electrode; 501, recessed area; 502, Protruding area; 503, gentle area; 600, first encapsulation layer; 700, color film layer; 800, second encapsulation layer; 900, transparent cover.
  • 100 Drive backplane; 101, substrate; 102, active area; 1021, source; 1022, drain; 103, gate insulating layer; 104, gate electrode; 105, first insulating layer; 106, first wiring 107, the second insulating layer; 108, the second wiring layer; 109, the flat layer; 110, the ring groove; 200, the first electrode layer; 201, the first electrode; 210, the middle part; 211, the edge part; 2110. Flat part; 2111. Climbing part; 220. First conductive layer; 221. Second conductive layer; 222. Third conductive layer; 300. Leakage cut-off layer; 301. First limiting layer; 3011.
  • Opening; 302 The second limiting layer; 400, the light-emitting function layer; 500, the second electrode; 501, the recessed area; 502, the protruding area; 503, the gentle area; 600, the first encapsulation layer; 700, the color film layer; 800, the first Two encapsulation layers; 900, transparent cover.
  • an OLED display panel includes a driving backplane, a plurality of first electrodes, a pixel definition layer, a light-emitting function layer, a second electrode, and a color filter layer, wherein the first electrode array is distributed on the driving backplane; the pixel definition layer Set on the surface of the driving backplane where the first electrode is provided, and each first electrode is exposed; the light-emitting function layer covers the pixel definition layer and the surface of the first electrode facing away from the driving backplane, and the second electrode covers the light-emitting function layer facing away from the driving backplane In this way, a plurality of light-emitting devices can be defined by the pixel definition layer.
  • the color filter layer is arranged on the side of the second electrode away from the driving backplane, and has a plurality of filter regions corresponding to each light-emitting device one by one, and each filter region and its corresponding light-emitting device can be used as a sub-pixel.
  • the thickness of the pixel definition layer is greater than that of the first electrode, when the light-emitting function layer is formed by the evaporation process, the light-emitting function layer will be recessed at the junction of the first electrode and the pixel definition layer, that is, at the edge of the light-emitting device, so that The second electrode correspondingly forms a recessed area, and the distance between the recessed area of the second electrode and the first electrode is relatively close, which is prone to tip discharge or even short circuit, which affects the stability of the light-emitting device and makes it difficult for the display panel to emit light stably.
  • the recessed area of the second electrode corresponds to the first electrode, and therefore also emits light.
  • the topography of the recessed area is a structure recessed toward the driving backplane, rather than a planar structure, the light is emitted within the range of the recessed area.
  • the light is in a scattered state, and at least part of the light is skewed toward adjacent sub-pixels, so that the light emission of the adjacent sub-pixels interferes with each other and affects the display effect.
  • the light-emitting function layer is recessed in the second electrode at the junction of the first electrode and the pixel definition layer, so that the second electrode forms a recessed area in the area corresponding to the recessed area, and the recessed area is directly opposite to the first electrode, that is, the recessed area is driving back.
  • the orthographic projection of the plate is located in the first electrode, so that a sharp discharge or even a short circuit may occur between the two.
  • the recessed area emits light, and because the shape of the recessed area is curved, the light emitted by the recessed area is in a scattered state, which interferes with the light emission of adjacent sub-pixels.
  • the light-emitting function layer is a continuous film layer, so that the sub-pixels are connected to each other, at least a part of the film layer (including but not limited to the hole injection layer) in the light-emitting function layer will cause the gap between adjacent sub-pixels. Produce crosstalk.
  • the light-emitting function layer includes a plurality of light-emitting unit layers, and two adjacent light-emitting unit layers are connected in series through a charge generation layer.
  • the charge generation layer has good charge conduction characteristics, which will cause crosstalk between adjacent sub-pixels and affect the light-emitting effect.
  • the embodiments of the present disclosure provide three kinds of display panels.
  • the display panel may include a driving backplane 1, a first electrode layer 2, a light-emitting function layer 3, and a second electrode 4, wherein:
  • the first electrode layer 2 is provided on one side of the driving backplane 1, and includes a plurality of first electrodes 21 distributed in an array.
  • the first electrodes 21 include a flat middle portion 210 and an edge portion 211 surrounding the middle portion 210; the edge portion 211 includes Surrounding the flat part 2110 of the middle part 210 and the climbing part 2111 connected between the middle part 210 and the flat part 2110, the thickness of the flat part 2110 is smaller than that of the middle part 210.
  • the light-emitting function layer 3 at least partially covers the first electrode 21.
  • the second electrode 4 covers the light-emitting function layer 3, and includes a partition 41 and a plurality of flat parts 42 separated by the partition 41.
  • the orthographic projection of each flat part 42 on the driving backplane 1 corresponds to each first electrode.
  • the partition 41 includes a protruding area 411 and a first recessed area 412 connecting the protruding area 411 and the smooth portion 42.
  • the first recessed area 412 is recessed toward the side of the smooth portion 42 close to the driving back plate 1, and the protruding area 411 protrudes toward the side of the smooth portion 42 away from the driving back plate 1.
  • the orthographic projection of the first recessed area 412 on the driving backplane 1 is at least partially located outside the middle portion 210 of the first electrode 21.
  • each first electrode 21 and its corresponding light-emitting functional layer 3 and second electrode 4 can constitute a light-emitting device, which can emit light.
  • the first recessed area 412 of the second electrode 4 on the driving backplane 1 at least partially located outside the first electrode 21 and not directly opposite to the first electrode 21, the first recessed area 412 and the first recessed area 412 can be reduced.
  • the risk of sharp discharge between the electrodes 21 helps to ensure that the light-emitting device emits light stably.
  • the light emission within the range of the first recessed area 412 can be reduced, thereby reducing the mutual interference of the light emission of adjacent light-emitting devices.
  • FIG. 2 is a partial electron microscope diagram of an embodiment of the first display panel of the present disclosure.
  • the risk of a sharp discharge with the first electrode 21 can be reduced.
  • it can reduce or even avoid the first recessed area 412 to emit light, and prevent interference to adjacent sub-pixels.
  • the driving backplane 1 may include a plurality of driving transistors for driving each light-emitting device to emit light to display images.
  • the driving backplane 1 includes a substrate 101, a gate insulating layer 103, a gate 104, a first insulating layer 105, and a first wiring layer 106.
  • the material of the substrate 101 can be Monocrystalline silicon or polycrystalline silicon, etc., are not particularly limited here; the substrate 101 may include an active region 102 and a source electrode 1021 and a drain electrode 1022 located at both ends of the active region 102.
  • the gate insulating layer 103 covers the active region 102; the gate 104 is provided on the surface of the gate insulating layer 103 away from the substrate 101.
  • the first insulating layer 105 covers the gate 104 and the substrate 101, and its material may include at least one of silicon oxide and silicon nitride.
  • the first wiring layer 106 is provided on the surface of the first insulating layer 105 away from the substrate 101, and the gate 104, the source 1021 and the drain 1022 are all connected to the first wiring layer 106 through via holes filled with tungsten or other metals.
  • the drive backplane 1 may further include a second insulating layer 107 and a second wiring layer 108.
  • the second insulating layer 107 covers the first wiring layer 106 and the first insulating layer 105.
  • the second wiring layer 108 is provided on the first wiring layer.
  • the second insulating layer 107 is away from the surface of the substrate 101.
  • the specific pattern of the second wiring layer 108 is not particularly limited here, and it can be connected to the first wiring layer 106 through via holes filled with tungsten or other metals.
  • the second wiring layer 108 can be covered with a flat layer 109, the first electrode layer 2 can be provided on the surface of the flat layer 109 away from the substrate 101, and the first electrode 21 can be connected to the first electrode 21 through via holes filled with tungsten or other metals.
  • the second wiring layer 108 is connected.
  • the first electrode layer 2 is provided on one side of the driving backplane 1 and includes a plurality of first electrodes 21, and the first electrodes 21 are distributed in an array.
  • the first electrodes 21 of the first electrode layer 2 are arranged in an array on the surface of the flat layer 109 away from the substrate 101, and adjacent first electrodes 21 are arranged at intervals.
  • the first electrode 21 may include a middle part 210 and an edge part 211 surrounding the middle part 210.
  • the middle part 210 has a flat structure, that is, the middle part 210 is substantially parallel to the driving backboard 1.
  • the middle portion 210 is provided on the surface of the flat layer 109 facing away from the substrate 101 and parallel to the surface of the flat layer 109 facing away from the substrate 101.
  • the edge portion 211 may include a flat portion 2110 and a climbing portion 2111.
  • the flat portion 2110 is located on the driving back plate 1 and arranged around the middle portion 210, and the flat portion 2110 is substantially parallel to the driving back plate 1.
  • the flat portion 2110 is located on the surface of the flat layer 109 facing away from the substrate 101 and parallel to the surface of the flat layer 109 facing away from the substrate 101.
  • the thickness of the flat part 2110 is smaller than the thickness of the middle part 210.
  • the climbing part 2111 is connected between the middle part 210 and the flat part 2110, that is, the climbing part 2111 surrounds the middle part 210, the flat part 2110 is arranged around the climbing part 2111, and the slope of the climbing part 2111 relative to the driving back plate 1 is not less than 30°, the slope is the angle between the surface of the climbing part 2111 and the driving backplane 1.
  • the first electrode 21 in a direction perpendicular to the driving backplane 1, may have a multilayer structure.
  • the first electrode 21 may include a first conductive layer 220, a second conductive layer 221, and a The third conductive layer 222, wherein:
  • the first conductive layer 220 is provided on the surface of the flat layer 109 away from the substrate 101; the second conductive layer 221 is provided on the surface of the first conductive layer 220 away from the driving backplane 1; the third conductive layer 222 is provided on the second conductive layer 221 away from the driving
  • the surface of the backplane 1 extends to the driving backplane 1 at a certain slope, and then extends a certain distance along the driving backplane 1, so as to cover the first conductive layer 220 and the second conductive layer 221, and the first conductive layer 220 And the second conductive layer 221 for protection.
  • the material of the first conductive layer 220 may include titanium (Ti), the material of the second conductive layer 221 includes silver (Ag), and the material of the third conductive layer 222 includes indium tin oxide (ITO).
  • Ti titanium
  • the material of the second conductive layer 221 includes silver
  • ITO indium tin oxide
  • each conductive layer Other materials can also be used for the layer.
  • the middle portion 210 of the first electrode 21 includes an area of the third conductive layer 222 located on the surface of the second conductive layer 221 away from the driving backplane 1, and the first conductive layer 220 and the first conductive layer 220 and the first conductive layer 220 in the area of the front projection of the driving backplane 1 in this area.
  • the flat portion 2110 includes an area where the third conductive layer 222 extends along the driving backplane 1.
  • the climbing portion 2111 includes an area with a certain slope extending from the third conductive layer 222 to the driving backplane 1, and the first conductive layer 220 and the second conductive layer 221 in the orthographic projection range of the driving backplane 1.
  • the light-emitting function layer 3 may be a continuous film layer, and at the same time cover at least a part of the area of each first electrode 21.
  • the light-emitting function layer 3 includes a light-emitting unit layer, and the light-emitting unit layer includes a hole injection, a hole transport layer, and a light emitting layer which are sequentially stacked from the first electrode 21 in a direction away from the driving backplane 1. Layer, electron transport layer and electron injection layer.
  • the light-emitting functional layer 3 includes multiple light-emitting unit layers, and the hole injection, hole transport layer, light-emitting layer, electron transport layer, and electron injection layer of each light-emitting unit layer are distributed in the same manner.
  • a charge generation layer is provided between two adjacent light-emitting unit layers, so that the light-emitting unit layers are connected in series through the charge generation layer, so as to form a series-type OLED light-emitting device.
  • the second electrode 4 covers the light-emitting functional layer 3, and can apply driving signals to the first electrode 21 and the second electrode 4, so that the light-emitting functional layer 3 is located between the first electrode 21 and the second electrode 4 Glow.
  • the second electrode 4 includes a partition portion 41 and a plurality of smooth portions 42, wherein:
  • the smooth portions 42 are arranged in an array and are arranged in a one-to-one correspondence with the middle portion 210 of each first electrode 21, that is, the orthographic projection of each smooth portion 42 on the driving back plate 1 is located in the middle portion of each first electrode 21 in a one-to-one correspondence.
  • the gentle portion 42 is parallel or substantially parallel to the middle portion 210.
  • the partition 41 corresponds to the area of the driving back plate 1 that is not covered by the middle part 210, and is used to partition the smooth part 42.
  • the partition 41 includes a protruding area 411 and a first recessed area 412, wherein:
  • the protruding area 411 protrudes toward the side of the smooth portion 42 away from the driving back plate 1, and the first recessed area 412 is recessed toward the side of the smooth portion 42 close to the driving back plate 1.
  • the first recessed area 412 is connected between the protruding area 411 and the smooth portion 42, that is, the first recessed area 412 has a ring structure, and the number is multiple, and each first recessed area 412 surrounds each smooth portion 42 in a one-to-one correspondence. It is connected to the protruding area 411, that is, the first recessed area 412 is a transition area of the protruding area 411 and the smooth portion 42.
  • the orthographic projection of the first recessed area 412 on the driving backplane 1 is at least partially located outside the middle portion 210 of the first electrode 21, so as to be directly opposite to the area other than the first electrode 21 or the edge portion 211 with a smaller thickness, but not to The middle portion 210 with a larger thickness is directly opposite, which can reduce the risk of tip discharge and short circuit between the first recessed area 412 of the second electrode 4 and the first electrode 21, thereby improving the stability of the light emitting device of the light emitting device.
  • the orthographic projection of the lowest point of the first recessed area 412 on the driving backplane 1 is located outside the middle part 210, for example, the lowest point is related to the climbing slope.
  • the part 2111 corresponds to one of the flat part 2110 to avoid the occurrence of tip discharge with the middle part 210.
  • the lowest point of the first recessed area 412 on the cross section perpendicular to the driving back plate 1 is: on the cross section perpendicular to the driving back plate 1, the first recessed area 412 is the closest point to the first electrode 21, that is, the distance from the flat portion 42 The farthest point.
  • the number of the first recessed area 412 in the cross section perpendicular to the driving back plate 1 may be multiple, and the lowest point on different cross sections may be different.
  • the lowest point may be the depth.
  • the point closest to the first electrode 21 in the direction may also be other points in the depth direction, depending on the position of the cross section perpendicular to the driving back plate 1.
  • the first recessed area 412 has two sides, including a first side 4121 and a second side 4122.
  • the two side surfaces 4122 are connected to the protruding area 411.
  • the first side 4121 and the second side 4122 may shrink in a direction approaching the driving back plate 1.
  • the first side 4121 and the second side 4122 may be curved or flat, which is not specifically limited here.
  • the width S of the orthographic projection of the first recessed area 412 on the driving backplane 1 is not greater than 0.2 ⁇ m, that is, the maximum width of the first recessed area 412 is not greater than 0.2 ⁇ m. It is greater than 0.2 ⁇ m, such as 0.1 ⁇ m, 0.2 ⁇ m, and so on. It can avoid that the width of the first recessed area 412 is too large, and the front projection of the first recessed area 412 on the driving backplane 1 and the first electrode 21 have an overlap area or an overlap area that is too large, thereby further preventing the occurrence of tip discharge.
  • the depth of the first recessed region 412 is less than twice the maximum thickness of the second electrode 4.
  • the maximum thickness of the second electrode 4 is 90 nm.
  • the depth of the first recessed region 412 is less than 180 nm, such as 120 nm, 100 nm, 80 nm, 70 nm, 60 nm, 50 nm, 40 nm, and so on.
  • the depth of the first recessed area 412 refers to the maximum depth of the first recessed area 412, that is, in the direction perpendicular to the driving back plate 1, the point of the first recessed area 412 closest to the driving back plate 1 and the smooth portion 42 are away from the driving back plate. The distance from the surface of the board 1.
  • the orthographic projection of each first recessed area 412 in the driving backplane 1 surrounds the middle portion 210 of a first electrode 21, and the bottom of the first recessed area 412 is adjacent to
  • the minimum value of the distance between the middle portion 210 of the first electrode 21 (in the direction perpendicular to the driving back plate 1, the distance between the nearest point of the first recessed area 412 and the middle portion 210 and the middle portion 210) of the first electrode 21 is not less than the flat portion 42
  • 70% of the total thickness of the light-emitting functional layer 3 the total thickness of the smooth portion 42 and the light-emitting functional layer 3 is the sum of the thickness of the smooth portion 42 and the light-emitting functional layer 3, for example, the total thickness of the smooth portion 42 and the light-emitting functional layer 3
  • the distance between the bottom of the first recessed area 412 in the direction perpendicular to the driving backplane 1 and the middle portion 210 of the adjacent first electrode 21 is about 255 nm.
  • the maximum value of the distance between the bottom of the first recessed area 412 and the middle portion 210 of the adjacent first electrode 21 is not less than 400 nm, and the maximum value is not more than 450 nm.
  • the slope of the first side surface 4121 relative to the middle portion 210 of the first electrode 21 is smaller than the slope of the second side surface 4122 relative to the middle portion 210, that is, the first side surface 4121 is larger than the second side surface. 4122 is gentle.
  • the slope of the first side surface 4121 relative to the middle portion 210 may be less than 60°, for example, 50°, 45°, 40°, 30°, etc.; the slope of the second side surface 4122 relative to the middle portion 210 is not less than 60° , And not more than 90°, such as 60°, 75°, 90°, etc.
  • the slope of the first side surface 4121 relative to the middle portion 210 is: the angle ⁇ between the extension surface of the first side surface 4121 and the extension surface of the middle portion 210 facing away from the surface of the drive back plate 1; the second side surface 4122 is relative to the middle portion 210
  • the gradient of is: the angle ⁇ between the extension surface of the second side surface 4122 and the extension surface of the middle portion 210 facing away from the surface of the driving back plate 1.
  • the slope of the first side surface 4121 relative to the middle portion 210 is smaller than the slope of the second side surface 4122 relative to the middle portion 210, and the second electrode 4 corresponds to the area of the first side surface 4121
  • the minimum thickness is greater than the minimum thickness of the area of the second electrode 4 corresponding to the second side surface 4122.
  • the slope of the first side surface 4121 relative to the middle portion 210 may also be equal to the slope of the second side surface 4122 relative to the middle portion 210.
  • the protruding area 411 has a second recessed area 4111 recessed toward the driving back plate 1, and the depth of the second recessed area 4111 is smaller than the depth of the first recessed area 412.
  • the display panel of the present disclosure further includes a leakage cutoff layer 5, the leakage cutoff layer 5 is made of insulating material, and is provided with the first electrode layer 2 in the drive
  • the backplane 1 is on the same surface, and the leakage cut-off layer 5 at least partially exposes each first electrode 21.
  • the leakage cut-off layer 5 is provided with a plurality of openings that at least partially expose the middle portion 210.
  • the light-emitting functional layer 3 covers the leakage cutoff layer 5 and extends into the opening so as to cover at least a part of the middle portion 210.
  • the leakage cutoff layer 5 allows the light-emitting functional layer 3 to have a first recessed area 412 for forming the second electrode 4 Pits.
  • the leakage cutoff layer 5 includes a first confinement layer 51 and a second confinement layer 52, wherein:
  • the first limiting layer 51 and the first electrode layer 2 are provided on the same surface of the driving backplane 1, and the first limiting layer 51 has a plurality of openings 511, and each first electrode 21 is provided in each opening 511 in a one-to-one correspondence; Between the edge portion 211 of each first electrode 21 and the sidewall of the opening 511 where it is located, a spacer X exposing the driving backplane 1 is formed.
  • the materials of the planarization layer 109, the first confinement layer 301, and the second confinement layer 52 may include silicon oxide and silicon nitride, and the three materials are the same, for example: the planarization layer 109, Both the first confinement layer 51 and the second confinement layer 52 are silicon oxide.
  • the first limiting layer 51 is formed by the etching process, the position of the spacer X is over-etched, and the over-etched area extends along the sidewall of the opening 511 into the driving backplane 1, so that the driving backplane 1 is located in the spacer. At least part of the area of X is also etched to form an annular groove 110, that is, the flat layer 109 is etched.
  • the second limiting layer 52 covers the first limiting layer 51 and the area of the driving backplane 1 in the spacer X, and at least partially exposes the middle portion 210 of the first electrode 21, and the second limiting layer 52 is in the spacer X and corresponding to the edge
  • the area of the portion 211 is recessed toward the driving backplane 1; and the thickness of the second limiting layer 52 is smaller than the thickness of the first limiting layer 51;
  • the light-emitting functional layer 3 covers the second limiting layer 52, and due to the limitation of the evaporation process, the light-emitting functional layer 3 forms pits in the regions corresponding to the spacer X and the edge portion 211, and the second electrode 4 is recessed at the pits to form
  • the first recessed area 412 is such that the orthographic projection of the first recessed area 412 on the driving backplane 1 is at least partly located within the range of the spacer area X or the edge portion 211, so as to be located outside the middle portion 210, so as to avoid discharge from the middle portion 210 . Further, the lowest point of the first recessed area 412 on the cross section perpendicular to the driving back plate 1 is located within the range of the spacer area X or the edge portion 211 in the orthographic projection of the driving back plate 1.
  • the leakage interruption layer 5 includes a first confinement layer 51 and a second confinement layer 52, wherein:
  • the first confinement layer 51 and the first electrode layer 2 are arranged on the same surface of the driving backplane 1, and the second confinement layer 52 is disposed on the surface of the first confinement layer 51 facing away from the driving backplane 1.
  • the first confinement layer 51 and the second confinement layer The layers 52 at least partially expose the middle part 210 of the first electrode 21, and the first limiting layer 51 abuts on the boundary between the orthographic projection of the driving backplane 1 and the edge part 211 or covers the edges of the edge part 211 and the middle part 210;
  • the boundary of the orthographic projection of the layer 52 on the driving backplane 1 is located outside the middle portion 210, so that the second limiting layer 52 can be regarded as a ridge formed on the surface of the first limiting layer 51 facing away from the driving backboard 1.
  • the light-emitting functional layer 3 covers the second confinement layer 52, and due to the limitation of the evaporation process, the light-emitting functional layer 3 forms a pit on the sidewall of the region where the second confinement layer 52 exposes the first electrode 21.
  • the layer 51 corresponds to an area not covered by the second limiting layer 52, and the orthographic projection of the driving backplane 1 is located outside the middle portion 210 of the first electrode 21.
  • the light-emitting function layer 3 forms a convex structure at a position corresponding to the second defining layer 52.
  • first limiting layer 51 and second limiting layer 52 can be made of the same material and can be formed by one patterning process; alternatively, the first limiting layer 51 and the second limiting layer 52 can also be formed independently, and the two can be formed separately. Use different materials.
  • the second electrode 4 When the second electrode 4 covers the light-emitting functional layer 3, the second electrode 4 is recessed at the pit of the light-emitting functional layer 3 to form a first recessed area 412, and a convex area 411 is formed at the position of the convex structure.
  • the orthographic projection of the first recessed area 412 on the driving backplane 1 is located between the middle portion 210 and the orthographic projection of the second limiting layer 52 on the driving backplane 1, and the second limiting layer 52 is located on the convex area 411 on the leakage cutoff layer 5.
  • the orthographic projection lies within.
  • the first display panel of the present disclosure may further include a first encapsulation layer 6, a color film layer 7, a second encapsulation layer 8 and a transparent cover plate 9, wherein:
  • the first encapsulation layer 6 may cover the second electrode 4, for example, the first encapsulation layer 6 may include two inorganic layers and an organic layer between the two inorganic layers.
  • the color filter layer 7 is disposed on the side of the first encapsulation layer 6 away from the second electrode 4, and the color filter layer 7 includes filter regions corresponding to each first electrode 21 one by one.
  • the color filter regions have multiple colors, such as Red, blue and green.
  • the second encapsulation layer 8 can cover the color film layer 7, and its structure can be the same as that of the first encapsulation layer 6.
  • the transparent cover 9 can cover the second encapsulation layer 8, and its material can be glass or material.
  • the display panel includes a driving backplane 100, a first electrode layer 200, a leakage cutoff layer 300, a light-emitting function layer 400 and a second electrode 500, wherein:
  • the first electrode layer 200 is provided on one side of the driving backplane 100 and includes a plurality of first electrodes 201 distributed in an array; the first electrode 201 includes a flat middle portion 210 and an edge portion 211 surrounding the middle portion 210; the edge portion 211 includes Surrounding the flat part 2110 of the middle part 210 and the climbing part 2111 connected between the middle part 210 and the flat part 2110, the thickness of the flat part 2110 is smaller than that of the middle part 210.
  • the leakage blocking layer 300 and the first electrode layer 200 are provided on the same surface of the driving backplane 100, and the leakage blocking layer 300 includes a first limiting layer 301 and a second limiting layer 302 that are sequentially stacked in a direction away from the driving backplane 100.
  • a limiting layer 301 is provided with a first opening 3011 corresponding to the middle portion 210 of each first electrode 201, and the second limiting layer 302 is provided with a second opening 3011 surrounding the first opening 3011 at a position corresponding to the first opening 3011.
  • the second limiting layer 302 is arranged at intervals between the orthographic projection of the driving backplane 100 and the middle portion 210;
  • the first limiting layer 301 is provided with a one-to-one corresponding ring hole 3012 with a plurality of blind holes surrounding each first opening 3011 ,
  • the second limiting layer 302 is provided on the surface of the first limiting layer 301 away from the driving backplane 100, and is located outside the annular hole 3012;
  • the light-emitting function layer 400 at least partially covers the leakage cutoff layer 300 and the middle portion 210 of the first electrode 201;
  • the second electrode 500 covers the light-emitting function layer 400.
  • each first electrode 201 and its corresponding light-emitting function layer 400 and second electrode 500 can constitute a light-emitting device to emit light.
  • the second opening 3021 surrounds the first opening 3011, that is, the second opening 3021 is larger than the first opening 3011, the two can form a stepped hole, so that the first limiting layer 301 exists in the second opening 3021 and is covered by the second opening. 3021 The exposed area.
  • the second limiting layer 302 is spaced apart from the middle part 210 of the first electrode 201 in the orthographic projection of the driving backplane 100 and is located outside the annular hole 3012.
  • the pit may at least partially correspond to the annular hole 3012 exposed by the second opening 3021 of the first limiting layer 301 , Without corresponding to the middle portion 210 of the first electrode 201.
  • the lowest point of the recessed area 501 formed after the second electrode 500 is recessed in the recess at the cross section perpendicular to the driving backplane 1 does not correspond to the middle portion 210, that is, in the recessed area 501 of the second electrode 500.
  • the orthographic projection on the driving backplane 100 at the lowest point of the cross section perpendicular to the driving backplane 1 is located outside the middle part 210, that is, outside the light emitting device, so as to prevent the recessed area 501 from being between the middle part 210 of the first electrode 201 A sharp discharge or even a short-circuit occurs between them, which helps to ensure that the light-emitting device emits light stably.
  • light emission within the range of the recessed area 501 can be avoided, thereby reducing the mutual interference of the light emission of adjacent light-emitting devices.
  • the driving backplane 100 may include a plurality of driving transistors for driving each light emitting device to emit light to display an image.
  • the driving backplane 100 includes a substrate 101, a gate insulating layer 103, a gate 104, a first insulating layer 105, and a first wiring layer 106.
  • the material of the substrate 101 may be Monocrystalline silicon or polycrystalline silicon, etc., are not particularly limited here; the substrate 101 may include an active region 102 and a source electrode 1021 and a drain electrode 1022 located at both ends of the active region 102.
  • the gate insulating layer 103 covers the active region 102; the gate 104 is provided on the surface of the gate insulating layer 103 away from the substrate 101.
  • the first insulating layer 105 covers the gate 104 and the substrate 101, and its material may include at least one of silicon oxide and silicon nitride.
  • the first wiring layer 106 is provided on the surface of the first insulating layer 105 away from the substrate 101, and the gate 104, the source 1021 and the drain 1022 are all connected to the first wiring layer 106 through via holes filled with tungsten or other metals.
  • the driving backplane 100 may further include a second insulating layer 107 and a second wiring layer 108.
  • the second insulating layer 107 covers the first wiring layer 106 and the first insulating layer 105.
  • the second wiring layer 108 is provided on the first wiring layer.
  • the second insulating layer 107 faces away from the surface of the substrate 101.
  • the specific pattern of the second wiring layer 108 is not particularly limited here, and it can be connected to the first wiring layer 106 through via holes filled with tungsten or other metals.
  • the second wiring layer 108 can be covered with a flat layer 109, the first electrode layer 200 can be provided on the surface of the flat layer 109 away from the substrate 101, and the first electrode 201 can be connected to the first electrode 201 through via holes filled with tungsten or other metals.
  • the second wiring layer 108 is connected.
  • the first electrode layer 200 is provided on one side of the driving backplane 100, and includes a plurality of first electrodes 201, and the first electrodes 201 are distributed in an array.
  • the first electrodes 201 of the first electrode layer 200 are arranged in an array on the surface of the flat layer 109 away from the substrate 101, and adjacent first electrodes 201 are arranged at intervals.
  • the first electrode 201 may include a middle part 210 and an edge part 211 surrounding the middle part 210.
  • the middle part 210 has a flat structure, that is, the middle part 210 and the driving backplane 100 are substantially parallel.
  • the middle portion 210 is provided on the surface of the flat layer 109 facing away from the substrate 101 and parallel to the surface of the flat layer 109 facing away from the substrate 101.
  • the edge part 211 may include a flat part 2110 and a climbing part 2111.
  • the flat part 2110 is located on the driving back plate 100 and is arranged around the middle part 210, and the flat part 2110 is substantially parallel to the driving back plate 100.
  • the flat portion 2110 is located on the surface of the flat layer 109 facing away from the substrate 101 and parallel to the surface of the flat layer 109 facing away from the substrate 101.
  • the thickness of the flat part 2110 is smaller than the thickness of the middle part 210.
  • the climbing part 2111 is connected between the middle part 210 and the flat part 2110, that is, the climbing part 2111 surrounds the middle part 210, the flat part 2110 is arranged around the climbing part 2111, and the slope of the climbing part 2111 relative to the driving back plate 100 is not less than 30°, the slope is the angle between the surface of the climbing part 2111 and the driving backplane 100.
  • the first electrode 201 includes a flat middle portion 210 and an edge portion 211 surrounding the middle portion 210.
  • the orthographic projection on is located outside the middle portion 210 of the first electrode 201.
  • the first electrode 201 includes a first conductive layer 220, a second conductive layer 221, and a third conductive layer 222.
  • the first conductive layer 220 is provided on the surface of the flat layer 109 away from the substrate 101, and the second conductive layer 221 is provided on the first conductive layer. 220 is away from the surface of the driving backplane 100, and the third conductive layer 222 is provided on the surface of the second conductive layer 221 away from the driving backplane 100, and extends to the driving backplane 100 at a certain slope, thereby covering the first conductive layer 220 and
  • the second conductive layer 221 protects the first conductive layer 220 and the second conductive layer 221.
  • the middle portion 210 of the first electrode 201 includes the third conductive layer 222 in the area of the second conductive layer 221 facing away from the surface of the driving backplane 100, the first conductive layer 220 and the second conductive layer 221, and the edge portion 211 includes the third conductive layer 222 covers the area at the edges of the first conductive layer 220 and the second conductive layer 221, that is, the area extending toward the driving backplane 100.
  • the material of the first conductive layer 220 may include titanium (Ti)
  • the material of the second conductive layer 221 includes silver (Ag)
  • the material of the third conductive layer 222 includes indium tin oxide (ITO).
  • ITO indium tin oxide
  • the leakage cutoff layer 300 is made of insulating material and is provided on the same surface of the driving backplane 100 as the first electrode layer 200, for example, on the surface of the flat layer 109 away from the substrate 101.
  • the leakage cutoff layer 300 includes a first confinement layer 301 and a second confinement layer 302, wherein:
  • the first limiting layer 301 and the first electrode layer 200 are provided on the same surface of the driving backplane 100, and the first limiting layer 301 is provided with first openings 3011 exposing the middle portions 210 one by one, and at least exposing the middle portion 210 In a part of the area, the first limiting layer 301 covers the edge portion 211.
  • the first defining layer 301 may cover the edge of the first opening 3011 and may overlap the edge of the middle portion 210, and the thickness of the first defining layer 301 may be greater than, equal to, or less than the thickness of the first electrode 201 .
  • the first opening 3011 may also be smaller than the middle portion 210, and the thickness of the first limiting layer 301 is greater than the thickness of the middle portion 210, so that the first limiting layer 301 covers the middle portion of the first electrode 201 The edge of 210 and the edge portion 211, thereby preventing the burr on the edge of the first electrode 201 from generating tip discharge.
  • the first limiting layer 301 may be provided with a plurality of annular holes 3012 surrounding each first opening 3011 in a one-to-one correspondence.
  • the second confinement layer 302 is provided in an area of the surface of the first confinement layer 301 away from the driving backplate 100 that is not surrounded by the annular hole 3012, that is, outside the annular hole 3012, so as not to block the annular hole 3012.
  • the second confinement layer 302 is disposed on the surface of the first confinement layer 301 away from the driving backplane 100.
  • the second confinement layer 302 is spaced apart from the front projection of the driving backplane 100 and the middle part 210 of the first electrode 201, so that the second confinement layer
  • the orthographic projection of 302 on the driving backplane 100 is located outside the middle part 210.
  • the second limiting layer 302 is provided with a second opening 3021 surrounding the first opening 3011 at a position corresponding to the first opening 3011, so that any one of the first opening 3011 and the second opening 3021 surrounding the first opening 3011 can be A step hole is formed, and the second opening 3021 exposes the area of the first limiting layer 301 in the second opening 3021.
  • first confinement layer 301 and second confinement layer 302 can be made of the same material and can be formed by one patterning process; alternatively, the first confinement layer 301 and the second confinement layer 302 can also be formed independently, and both can be formed separately. Use different materials.
  • the light-emitting function layer 400 may be a continuous film layer, and at the same time at least partially cover the middle portion 210 of each first electrode 201.
  • the light-emitting function layer 400 includes a multi-layer light-emitting unit layer 401, and the hole injection layer, the hole transport layer, the light-emitting layer, and the electron transport layer of each light-emitting unit layer 401 Same as the distribution of the electron injection layer.
  • a charge generation layer 402 is provided between two adjacent light-emitting unit layers 401, so that the light-emitting unit layers 401 are connected in series through the charge generation layer 402, so as to form a series-type OLED light-emitting device.
  • the light-emitting functional layer 400 includes a light-emitting unit layer, and the light-emitting unit layer includes a hole injection layer and a hole transport layer that are sequentially stacked from the first electrode 201 in a direction away from the driving backplane 100. , Luminescent layer, electron transport layer and electron injection layer.
  • the edge of the part of the light-emitting function layer 400 located in the second opening 3021 is recessed toward the driving backplane 100 along the sidewall of the second opening 3021 to form a pit, which can be combined with The annular hole 3012 exposed by the second opening 3021 corresponds to it.
  • the area of the light-emitting function layer 400 corresponding to the second defining layer 302 forms a convex structure.
  • the second electrode 500 covers the light-emitting function layer 400, and a driving signal can be applied to the first electrode 201 and the second electrode 500, so that the light-emitting function layer 400 is located in the part between the first electrode 201 and the second electrode 500. Glow.
  • the morphology of the second electrode 500 matches that of the light-emitting functional layer 400, which is recessed in the pit of the light-emitting functional layer 400 to form a recessed area 501, and protrudes in the area corresponding to the convex structure of the second limiting layer 302 Area 502, the recessed area 501 corresponds to the annular hole 3012, so that the orthographic projection of the recessed area 501 on the driving backplane 100 is at least partially located outside the middle portion 210 of the first electrode 201, reducing or avoiding the difference between the first electrode 201 and the second electrode 201 and the second electrode 201.
  • a tip discharge occurs in the recessed area 501 of the electrode 500.
  • the area of the second electrode 500 corresponding to the middle portion 210 is a gentle area 503.
  • the connection relationship of the recessed area 501, the protruding area 502 and the smoothing area 503 can refer to the protruding area 411, the first recessed area 412 and the smoothing portion 42 in the above-mentioned first embodiment of the display panel, which will not be described in detail here.
  • the orthographic projection is completely outside the middle part 210, and the distance L between the sidewalls of the second opening 3021 and the edge of the middle part 210 surrounded by the second opening 3021 in the direction parallel to the middle part 210 is not less than two adjacent first electrodes 201
  • the maximum distance between two adjacent middle portions 210 is 1 ⁇ m
  • L is 0.2 ⁇ m, 0.1 ⁇ m, etc., so that the orthographic projection of the recessed area 501 on the first limiting layer 301 is located in the second Between the sidewall of the opening 3021 and the middle portion 210, that is, the orthographic projection of the recessed area 501 on the driving backplane 100 is completely outside the middle portion 210, so as to further avoid tip discharge.
  • the sidewall of the second opening 3021 may be perpendicular to the driving back plate 100, so that the cross section of the portion of the second limiting layer 302 located between the two middle portions 210 It is rectangular.
  • the side wall of the second opening 3021 expands in a direction away from the driving back plate 100, so that the second limiting layer 302 is located between the two middle portions 210.
  • the cross section is trapezoidal.
  • the included angle between the side wall of the second opening 3021 and the middle portion 210 that is, the included angle ⁇ between the extension surface of the side wall of the second opening 3021 and the extension surface of the middle portion 210 facing away from the surface of the drive backplate 100, is not less than 60. °, and not more than 90°, such as 60°, 65°, 70°, 80° or 90°.
  • the charge generation layer 402 of the light-emitting device can be cut off by the leakage cut-off layer 300.
  • the hole injection layer or other film layers can also be cut off to prevent crosstalk.
  • the light-emitting functional layer 400 includes multiple light-emitting unit layers 401, and the hole injection layer, hole transport layer, light-emitting layer, and electron transport layer of each light-emitting unit layer 401 Same as the distribution of the electron injection layer.
  • a charge generation layer 402 is provided between two adjacent light-emitting unit layers 401, so that the light-emitting unit layers 401 are connected in series through the charge generation layer 402, so as to form a series-type OLED light-emitting device.
  • the distance between the surface of the second confinement layer 302 facing away from the driving backplane 100 and the middle portion 210 of the first electrode 201 away from the surface of the driving backplane 100 that is, the distance between the second confinement layer 302 and the surface of the driving backplane 100
  • the height of the middle portion 210 is not less than 25% of the thickness of the light-emitting function layer 400 and not more than 80% of the thickness of the light-emitting function layer 400.
  • the level difference formed by the second limiting layer 302 can make the charge generation layer 402 of the light-emitting function layer 400 Or the hole injection layer and other highly conductive film layers are disconnected, so as to avoid crosstalk between adjacent light-emitting devices.
  • the height of the second limiting layer 302 relative to the middle portion 210 is not more than 320 nm and not less than 100 nm. If the thickness of the light-emitting function layer 400 is 300 nm, the height of the second limiting layer 302 relative to the middle portion 210 is not more than 75 nm and not less than 25 nm.
  • the second limiting layer 302 may be provided with a groove 3022 in the area outside the second opening 3021, and the charge generation layer 402 may be hindered by the groove 3022. It is beneficial to further cut off the charge generation layer 402 and better prevent crosstalk.
  • the shape and structure of the groove 3022 are not particularly limited here, and its depth is less than the depth of the recessed area 501.
  • the number of the grooves 3022 may be one or multiple distributed in a concentric ring shape.
  • the width of the groove 3022 is smaller than the distance between the middle portions 210 of two adjacent first electrodes 201.
  • the maximum width of the groove 3022 is The width is 1 ⁇ m.
  • the width can be greater than 0.2 ⁇ m, so that the groove 3022 has a certain span, so that the charge generation layer 402 can be truncated due to the existence of the groove 3022.
  • the first display panel in the present disclosure may further include a first encapsulation layer 600, a color filter layer 700, a second encapsulation layer 800, and a transparent cover 900, wherein the first encapsulation layer 600 may cover the second electrode 500,
  • the first encapsulation layer 600 may include two inorganic layers and an organic layer between the two inorganic layers.
  • the color filter layer 700 is disposed on the side of the first encapsulation layer 600 away from the second electrode 500, and the color filter layer 700 includes filter regions corresponding to each first electrode 201 one by one, and the color filter regions have multiple colors, for example Red, blue and green.
  • the second encapsulation layer 800 may cover the color filter layer 700, and its structure may be the same as that of the first encapsulation layer 600.
  • the transparent cover 900 can cover the second encapsulation layer 800, and its material can be glass or material.
  • the third display panel may include a driving backplane 100, a first electrode layer 200, a leakage cutoff layer 300, a light-emitting function layer 400, and a second electrode 500, wherein:
  • the first electrode layer 200 is disposed on one side of the driving backplane 100 and includes a plurality of first electrodes 201 distributed in an array; the first electrode 201 includes a flat middle part 210 and an inclined edge part 211 surrounding the middle part 210.
  • the edge part 211 includes a flat part 2110 surrounding the middle part 210 and a climbing part 2111 connected between the middle part 210 and the flat part 2110.
  • the thickness of the flat part 2110 is smaller than that of the middle part 210.
  • the leakage cutoff layer 300 includes a first limiting layer 301 and a second limiting layer 302.
  • the first limiting layer 301 and the first electrode layer 200 are provided on the same surface of the driving backplane 100 and have a plurality of openings 3011.
  • Each first electrode 201 One-to-one correspondence is provided in each opening 3011, that is, each opening 3011 of the first limiting layer 301 is provided with a first electrode 201.
  • a spacer X exposing the driving backplane 100 is formed between the edge portion 211 of each first electrode 201 and the sidewall of the opening 3011 where it is located.
  • the second confinement layer 302 covers the first confinement layer 301 and the drive backplane 100 located in the spacer area X, and exposes the middle portion 210 of the first electrode 201, and the second confinement layer 302 is located in the spacer zone X and corresponding to the edge portion 211
  • the area is recessed toward the driving backplane 100, that is, the second confinement layer 302 conforms to the surfaces of the first confinement layer 301 and the driving backplane 100.
  • the light-emitting functional layer 400 covers at least the second defining layer 302 and the middle portion 210 of the first electrode 201; the second electrode 500 covers the light-emitting functional layer 400.
  • the second limiting layer 302 is recessed toward the driving backplane 100 in the spacer region X, the pits formed by the light-emitting function layer 400 due to process problems can be located at the corresponding spacer region X or the edge portion 211.
  • the recessed area 501 formed after the second electrode 500 is recessed at the pit does not correspond to the central portion 210, that is, the recessed area 501 of the second electrode 500 is vertical
  • the orthographic projection of the lowest point on the cross-section of the driving backplane 1 on the driving backplane 100 is located outside the middle portion 210, that is, outside the light emitting device, so as to prevent the second electrode 500 from being between the recessed area 501 and the middle portion 210
  • the occurrence of tip discharge, or even short-circuit helps to ensure that the light-emitting device emits light stably. At the same time, light emission within the range of the recessed area 501 can be avoided, thereby reducing the mutual interference of the light emission of adjacent light-emitting devices.
  • the specific structure of the driving backplane 100 and the first electrode layer 200 of the third display panel can refer to the above-mentioned second display panel, which will not be described in detail here.
  • the driving backplane 100 includes a substrate 101, a driving transistor, and a flat layer 109.
  • the substrate 101 may be a silicon substrate, and the driving transistor is provided on the side of the substrate 101; the flat layer 109 is provided on the back of the driving transistor.
  • One side of the substrate 101; the first electrode layer 200 and the leakage cutoff layer 300 are provided on the surface of the flat layer 109 away from the substrate 101.
  • the driving backplane 100 can be a silicon-based backplane, which can include a substrate 101, a gate insulating layer 103, a gate 104, a first insulating layer 105, a first wiring layer 106, a second insulating layer 107, and a second insulating layer.
  • the wiring layer 108 and the planarization layer 109, the substrate 101 includes an active region 102, and the active region 102 has a source electrode 1021 and a drain electrode 1022.
  • the specific structure can refer to the second display panel implementation.
  • the first defining layer 301 and the first electrode 201 may be provided on the surface of the flat layer 109 away from the substrate 101.
  • the materials of the planarization layer 109, the first confinement layer 301, and the second confinement layer 302 may include insulating materials such as silicon oxide and silicon nitride.
  • the thickness of the first defining layer 301 may be greater than that of the first electrode layer 200, so as to cut off the hole injection layer in the light-emitting function layer 400 and other films that can generate crosstalk between two adjacent sub-pixels. Floor.
  • the first electrode 201 includes a first conductive layer 220, a second conductive layer 221, and a third conductive layer 222.
  • the first conductive layer 220 is provided on the surface of the flat layer 109 away from the substrate 101, and the second The conductive layer 221 is disposed on the surface of the first conductive layer 220 facing away from the driving backplane 100, and the third conductive layer 222 is disposed on the surface of the second conductive layer 221 facing away from the driving backplane 100, and extends to the driving backplane 100 at a certain slope.
  • the first conductive layer 220 and the second conductive layer 221 are covered, and the first conductive layer 220 and the second conductive layer 221 are protected.
  • the middle portion 210 of the first electrode 201 includes the third conductive layer 222 located in the area of the second conductive layer 221 away from the surface of the driving backplane 100, the first conductive layer 220 and the second conductive layer 221, and the edge portion 211 includes the third conductive layer 222.
  • the conductive layer 222 covers the edge areas of the first conductive layer 220 and the second conductive layer 221, that is, the area extending toward the driving backplane 100.
  • the material of the first conductive layer 220 may include titanium (Ti)
  • the material of the second conductive layer 221 includes silver (Ag)
  • the material of the third conductive layer 222 includes indium tin oxide (ITO).
  • ITO indium tin oxide
  • the thickness of the second confinement layer 302 is smaller than that of the first confinement layer 301. Further, the thickness of the second confinement layer 302 can be less than 1/5 of the thickness of the first confinement layer 301, which can avoid the gap The area X and the edge portion 211 are filled up, and a recessed structure cannot be formed.
  • the thickness of the first confinement layer 301 is about 350 nm
  • the thickness of the second confinement layer 302 is not greater than 70 nm, for example, the thickness of the second confinement layer 302 is 60 nm, 50 nm, and so on.
  • the driving backplane 100 is provided with an annular groove 110 surrounding the first electrode 201 in each spacer X, and the second defining layer 302 is recessed into the annular groove 110 in the part of the spacer X.
  • the annular groove 110 is formed on the flat layer 109, and the depth of the annular groove 110 is smaller than the thickness of the flat layer 109, and the specific thickness is not specifically limited herein.
  • the materials of the planarization layer 109, the first confinement layer 301, and the second confinement layer 302 may include silicon oxide and silicon nitride, and the three materials are the same, for example: the planarization layer 109, the first confinement layer 301 Both the second limiting layer 302 and the second limiting layer 302 are silicon oxide.
  • the first limiting layer 301 is formed by the etching process, the position of the spacer X is over-etched, and the over-etched area extends along the sidewall of the opening 3011 into the driving backplane 100, so that the driving backplane 100 is located in the spacer. At least part of the area of X is also etched to form an annular groove 110, that is, the flat layer 109 is etched.
  • the orthographic projection of the annular groove 110 on the driving back plate 100 coincides with the spacer area X, that is, the sidewall of the annular groove 110 is the boundary of the spacer area X.
  • the over-etched area can be smaller than the spacer X, so that the sidewall of the annular groove 110 and the edge 211 of the first electrode 201 can have a certain distance.
  • the second electrode 500 covers the opening
  • the slope ⁇ of the area of the side wall of 3011 relative to the middle portion 210 of the first electrode 201 is not less than 65° and not more than 90°, such as 60°, 75°, 90°, and so on.
  • the slope ⁇ of the region between the middle portion 210 and the annular groove 110 of the second electrode 500 relative to the middle portion 210 is less than 60°, for example, 50°, 45°, 40°, 30°, and so on.
  • the light-emitting functional layer 400 covers at least a part of the second limiting layer 302 and the first electrode 201.
  • the light-emitting functional layer 400 is located in the spacer X The part is recessed toward the driving backplane 100 to form a pit.
  • the area of the light-emitting function layer 400 corresponding to the first defining layer 301 forms a convex structure.
  • the specific details of the light-emitting functional layer 400 can refer to the implementation of the second display panel, which will not be described in detail here.
  • the second electrode 500 covers the light-emitting function layer 400 and is recessed in the pits of the light-emitting function layer 400 to form a recessed area 501. Due to the limitation of the pits, the recessed area 501 is perpendicular to the driving The orthographic projection of the lowest point of the cross section of the back plate 1 on the driving back plate 100 is located within the range of the spacer X or the edge portion 211, that is, located outside the middle portion 210, that is, located outside the light emitting device, so as to prevent the second electrode 500 A sharp discharge or even a short circuit occurs between the recessed area 501 and the first electrode 201, which is beneficial to ensure that the light-emitting device emits light stably.
  • the area of the second electrode 500 corresponding to the first limiting layer 301 is the convex area 502, and the area of the second electrode 500 corresponding to the middle portion 210 is the flat area 503.
  • the connection relationship of the recessed area 501, the protruding area 502 and the smoothing area 503 can refer to the protruding area 411, the first recessed area 412 and the smoothing portion 42 in the first embodiment of the display panel, which will not be described in detail here.
  • the display panel of the present disclosure may further include a first encapsulation layer 600, a color film layer 700, a second encapsulation layer 800, and a transparent cover plate 900.
  • the specific structure may refer to the first type described above. And the implementation of the second display panel will not be described in detail here.
  • the embodiments of the present disclosure also provide a method for manufacturing a display panel, which may be the second type of display panel described above. As shown in FIG. 11, the manufacturing method includes steps S110 to S140, wherein:
  • Step S110 forming a first electrode layer on one side of the driving backplane, the first electrode layer including a plurality of first electrodes distributed in an array; the first electrode including a flat middle part and an edge part surrounding the middle part;
  • the edge part includes a flat part surrounding the middle part and a climbing part connected between the middle part and the flat part, and the thickness of the flat part is smaller than the middle part;
  • Step S120 forming a leakage blocking layer on the side of the driving backplane where the first electrode layer is provided, the leakage blocking layer including a first limiting layer and a second limiting layer stacked in a direction away from the driving backplane.
  • the first limiting layer is provided with first openings corresponding to each of the first electrodes, and the position of the second limiting layer corresponding to the first opening is provided with surrounding the first opening.
  • the second defining layer is spaced apart from the middle part of the orthographic projection of the drive backplane and the middle part; the first defining layer is provided with a one-to-one correspondence around each of the first openings
  • An annular hole with a blind hole structure, the second limiting layer is provided on a surface of the first limiting layer away from the driving back plate, and located outside the annular hole;
  • Step S130 forming a light-emitting function layer covering at least the leakage cut-off layer and the intermediate portion;
  • Step S140 forming a second electrode covering the light-emitting function layer.
  • forming a leakage blocking layer on the side of the driving backplane where the first electrode layer is provided includes:
  • Step S1210 A first limiting layer is formed on the side of the driving backplane where the first electrode layer is provided.
  • Step S1220 forming a second limiting layer on the surface of the first limiting layer facing away from the driving backplane, the second limiting layer corresponding to the first opening is provided with a surrounding outside the first opening A second opening, the second limiting layer is arranged at intervals between the orthographic projection of the drive backplane and the middle portion, and the second limiting layer is provided on the surface of the first limiting layer away from the drive backplate, And located outside the annular hole.
  • the first confinement layer and the second confinement layer can be formed at one time by a gray-scale mask process or other patterning processes; of course, they can also be formed separately, and there is no special limitation here.
  • Embodiments of the present disclosure also provide a method for manufacturing a display panel, which can be the third display panel described above. As shown in FIG. 12, the manufacturing method includes step S210-step S250, wherein:
  • Step S210 forming a first electrode layer on one side of the driving backplane, the first electrode layer including a plurality of first electrodes distributed in an array; the first electrode including a flat middle part and an edge part surrounding the middle part;
  • the edge part includes a flat part surrounding the middle part and a climbing part connected between the middle part and the flat part, and the thickness of the flat part is smaller than the middle part;
  • Step S220 forming a first limiting layer on the side of the driving backplane where the first electrode layer is provided, the first limiting layer has a plurality of openings, and each of the first electrodes is provided in each of the first electrodes in a one-to-one correspondence.
  • the opening each of the edge portions and the side wall of the opening in which they are located forms a space exposing the drive backplane;
  • Step S230 forming a second limiting layer covering the first limiting layer and the drive backplane located in the spacer area, the second limiting layer at least partially exposing the middle part, and in the spacer area and corresponding to The area of the edge portion is recessed toward the drive back plate;
  • Step S240 forming a light-emitting function layer that at least partially covers the second limiting layer and the middle portion;
  • Step S250 forming a second electrode covering the light-emitting function layer.
  • the embodiments of the present disclosure also provide a display device, which may include any one of the above-mentioned first type display panel, second type display panel, and third type display panel.
  • the first type display panel to For the specific structure of the third display panel, reference may be made to the above implementation manners, which will not be repeated here.
  • the display device of the present disclosure can be used in electronic devices such as mobile phones, tablet computers, and televisions.

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Abstract

本公开是关于一种显示装置、显示面板及其制造方法，涉及显示技术领域。该显示面板包括驱动背板、第一电极层、发光功能层和第二电极。第一电极层设于驱动背板的一面，且包括多个第一电极，第一电极包括平坦的中间部和围绕中间部的边缘部；边缘部包括围绕中间部的平坦部以及连接中间部和平坦部的爬坡部，平坦部的厚度小于中间部；发光功能层覆盖中间部；第二电极覆盖发光功能层且包括分隔部和被分隔部分隔的多个平缓部，各平缓部在驱动背板上的正投影一一对应的位于各第一电极以内；分隔部包括凸出区以及连接凸出区和平缓部的第一凹陷区，第一凹陷区在驱动背板上的正投影至少部分位于中间部以外。 (图1)

Description

显示装置、显示面板及其制造方法
交叉引用
本公开要求于2020年3月27日提交的申请号为202010230956.6名称为“显示装置、显示面板及其制造方法”的中国专利申请的优先权，该中国专利申请的全部内容通过引用全部并入本文。
技术领域
本公开涉及显示技术领域，具体而言，涉及一种显示装置、显示面板及显示面板的制造方法。
背景技术
目前，OLED(Organic Light-Emitting Diode，有机发光二极管)显示面板的应用越来越广泛。在OLED显示面板中，发光器件通常包括阵列分布的多个OLED发光器件，每个发光器件可独立发光，以便显示图像。但是，由于制造工艺的原因，OLED发光器件发光的稳定性仍有待提高。
需要说明的是，在上述背景技术部分公开的信息仅用于加强对本公开的背景的理解，因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
公开内容
本公开的目的在于提供一种显示装置、显示面板及显示面板的制造方法。
根据本公开的一个方面，提供一种显示面板，包括：
驱动背板；
第一电极层，设于所述驱动背板的一面，且包括阵列分布的多个第一电极，所述第一电极包括平坦的中间部和围绕所述中间部的边缘部；所述边缘部包括围绕所述中间部的平坦部以及连接于所述中间部和所述平坦部之间的爬坡部，所述平坦部的厚度小于所述中间部；
发光功能层，至少部分覆盖所述中间部；
第二电极，覆盖所述发光功能层，且包括分隔部和被所述分隔部分隔的多个平缓部，各所述平缓部在所述驱动背板上的正投影一一对应的位于各所述第一电极以内；所述分隔部包括凸出区以及连接所述凸出区和所述平缓部的第一凹陷区，所述第一凹陷区向所述平缓部靠近所述驱动背板的一侧凹陷，所述凸出区向所述平缓部背离所述驱动背板的一侧凸起，所述第一凹陷区在所述驱动背板上的正投影至少部分位于所述第一电极的中间部以外。
在本公开的一种示例性实施例中，在垂直于驱动背板的截面上，所述第一凹陷区的最低点在所述驱动背板上的正投影位于所述第一电极的中间部以外。
在本公开的一种示例性实施例中，所述第一凹陷区包括与所述平缓部相接的第一侧面以及与所述凸出区相接的第二侧面，所述第一侧面和所述第二侧面沿靠近所述驱动背板的方向收缩。
在本公开的一种示例性实施例中，所述第一侧面相对于所述中间部的坡度小于或等于所述第二侧面相对于所述中间部的坡度。
在本公开的一种示例性实施例中，所述第二电极对应于所述第一侧面的区域的最小厚度大于对应于所述第二侧面的区域的最小厚度。
在本公开的一种示例性实施例中，所述第一侧面相对于所述中间部的坡度小于60°；所述第二侧面相对于所述中间部的坡度不小于60°，且不大于90°。
在本公开的一种示例性实施例中，所述第一凹陷区在所述驱动背板上的正投影的宽度不大于0.2μm。
在本公开的一种示例性实施例中，所述第一凹陷区的深度小于所述第二电极最大厚度的两倍。
在本公开的一种示例性实施例中，所述第二电极的最大厚度为90nm，所述第一凹陷区的深度小于120nm。
在本公开的一种示例性实施例中，所述爬坡部相对于所述驱动背板的坡度不小于30°。
在本公开的一种示例性实施例中，所述第一凹陷区的底部与相邻的 第一电极的中间部沿垂直于所述驱动背板的方向的距离的最小值不小于所述平缓部和所述发光功能层的总厚度的70％。
在本公开的一种示例性实施例中，所述凸出区具有向所述驱动背板凹陷的第二凹陷区，所述第二凹陷区的深度小于所述第一凹陷区的深度。
在本公开的一种示例性实施例中，所述显示面板还包括：
漏电截断层，与所述第一电极层设于所述驱动背板的同一面，所述发光功能层覆盖所述漏电截断层；
所述漏电截断层包括向背离所述驱动背板的方向依次层叠的第一限定层和第二限定层，所述第一限定层和所述第二限定层均至少部分露出所述第一电极的中间部，且所述第二限定层在所述驱动背板上的正投影的边界位于所述中间部以外；
在垂直于驱动背板的截面上，所述第一凹陷区的最低点在所述驱动背板的正投影位于所述中间部和所述第二限定层在所述驱动背板的正投影之间；所述第二限定层位于所述凸出区在所述漏电截断层的正投影位于以内。
在本公开的一种示例性实施例中，所述显示面板还包括：
漏电截断层，包括第一限定层和第二限定层，所述第一限定层与所述第一电极层设于所述驱动背板的同一面，且具多个开口，各所述第一电极一一对应的设于各所述开口内；每个所述第一电极的边缘部与其所处的开口的侧壁之间形成露出所述驱动背板的间隔区；
所述第二限定层覆盖所述第一限定层和位于所述间隔区的驱动背板，并至少部分露出所述第一电极的中间部，且所述第二限定层在所述间隔区和对应于所述边缘部的区域向所述驱动背板凹陷；所述第二限定层的厚度小于所述第一限定层的厚度；
所述发光功能层覆盖所述第二限定层。
根据本公开的一个方面，提供一种显示面板，包括：
驱动背板；
第一电极层，设于所述驱动背板的一面，且包括阵列分布的多个第一电极；所述第一电极包括平坦的中间部和围绕所述中间部的边缘部；所述边缘部包括围绕所述中间部的平坦部以及连接于所述中间部和所述 平坦部之间的爬坡部，所述平坦部的厚度小于所述中间部；
漏电截断层，与所述第一电极层设于所述驱动背板的同一面，且包括向背离所述驱动背板的方向依次层叠的第一限定层和第二限定层，所述第一限定层设有一一对应露出各所述第一电极的中间部的第一开口，所述第二限定层对应于所述第一开口的位置设有围绕于所述第一开口外的第二开口，所述第二限定层在所述驱动背板的正投影与所述中间部间隔分布；所述第一限定层设有一一对应的围绕各所述第一开口的多个盲孔结构的环形孔，所述第二限定层设于所述第一限定层背离所述驱动背板的表面，且位于所述环形孔以外；
发光功能层，至少部分覆盖所述漏电截断层和所述第一电极的中间部；
第二电极，覆盖所述发光功能层。
在本公开的一种示例性实施例中，所述第二开口的侧壁和其围绕的所述第一电极的中间部边缘的间距不小于相邻两所述第一电极的中间部的最大间距的1/5。
在本公开的一种示例性实施例中，所述第二开口的侧壁和其围绕的第一电极的中间部的边缘的间距不小于0.2μm。
在本公开的一种示例性实施例中，在垂直于所述驱动背板的方向上，所述第二限定层背离所述驱动背板的表面与所述中间部背离所述驱动背板的表面的距离，不小于所述发光功能层的厚度的25％，且不大于所述发光功能层的厚度的80％。
在本公开的一种示例性实施例中，所述第二开口的侧壁向背离所述驱动背板的方向扩张，且所述第二开口的侧壁与所述中间部的夹角不小于65°，且不大于90°。
在本公开的一种示例性实施例中，所述第二限定层位于所述第二开口以外的区域设有凹槽。
在本公开的一种示例性实施例中，所述凹槽的宽度小于相邻两所述第一电极的中间部的间距。
在本公开的一种示例性实施例中，所述凹槽的宽度大于0.2μm。
根据本公开的一个方面，提供一种显示面板，包括：
驱动背板；
第一电极层，设于所述驱动背板的一面，且包括阵列分布的多个第一电极，所述第一电极包括平坦的中间部和围绕所述中间部的边缘部；所述边缘部包括围绕所述中间部的平坦部以及连接于所述中间部和所述平坦部之间的爬坡部，所述平坦部的厚度小于所述中间部；
漏电截断层，包括第一限定层和第二限定层，所述第一限定层与所述第一电极层设于所述驱动背板的同一面，且具多个开口，各所述第一电极一一对应的设于各所述开口内；每个所述第一电极的边缘部与其所处的开口的侧壁之间形成露出所述驱动背板的间隔区；所述第二限定层覆盖所述第一限定层和位于所述间隔区的驱动背板，并至少部分露出所述第一电极的中间部，且所述第二限定层在所述间隔区和对应于所述边缘部的区域向所述驱动背板凹陷；
发光功能层，至少部分覆盖所述第二限定层和所述第一电极的中间部；
第二电极，覆盖所述发光功能层。
在本公开的一种示例性实施例中，所述第二限定层的厚度小于所述第一限定层的厚度。
在本公开的一种示例性实施例中，所述驱动背板在所述间隔区内设有围绕所述第一电极的环形槽，所述第二限定层位于所述间隔区的部分凹陷至所述环形槽内。
在本公开的一种示例性实施例中，所述驱动背板包括：
基底；
驱动晶体管，设于所述基底一侧；
平坦层，设于所述驱动晶体管背离所述基底的一侧；所述第一电极层和所述漏电截断层设于所述平坦层背离所述基底的表面，所述平坦层的材料、所述第一限定层和所述第二限定层的材料相同。
在本公开的一种示例性实施例中，所述环形槽与所述间隔区在所述驱动背板上的正投影重合。
在本公开的一种示例性实施例中，所述第二电极对应于所述开口侧壁的区域相对于所述中间部的坡度不小于65°，且不大于90°；所述第 二电极对应于所述边缘部的区域相对于所述中间部的坡度小于60°。
在本公开的一种示例性实施例中，所述第二限定层的厚度小于所述第一限定层厚度的1/5。
根据本公开的一个方面，提供一种显示面板的制造方法，包括：
在驱动背板一面形成第一电极层，所述第一电极层包括阵列分布的多个第一电极；所述第一电极包括平坦的中间部和围绕所述中间部的边缘部；所述边缘部包括围绕所述中间部的平坦部以及连接于所述中间部和所述平坦部之间的爬坡部，所述平坦部的厚度小于所述中间部；
在所述驱动背板设有所述第一电极层的一面形成漏电截断层，所述漏电截断层包括向背离所述驱动背板的方向依次层叠的第一限定层和第二限定层，所述第一限定层设有一一对应露出各所述第一电极的第一开口，所述第二限定层对应于所述第一开口的位置设有围绕于所述第一开口外的第二开口，所述第二限定层在所述驱动背板的正投影与所述中间部间隔分布；所述第一限定层设有一一对应的围绕各所述第一开口的多个盲孔结构的环形孔，所述第二限定层设于所述第一限定层背离所述驱动背板的表面，且位于所述环形孔以外；
形成至少部分覆盖所述漏电截断层和所述中间部的发光功能层；
形成覆盖所述发光功能层的第二电极。
在本公开的一种示例性实施例中，所述第一限定层和所述第二限定层通过同一次构图工艺形成。
根据本公开的一个方面，提供一种显示面板的制造方法，包括：
在驱动背板一面形成第一电极层，所述第一电极层包括阵列分布的多个第一电极，所述第一电极包括平坦的中间部和围绕所述中间部的边缘部；所述边缘部包括围绕所述中间部的平坦部以及连接于所述中间部和所述平坦部之间的爬坡部，所述平坦部的厚度小于所述中间部；
在所述驱动背板设有所述第一电极层的一面形成第一限定层，所述第一限定层具多个开口，各所述第一电极一一对应的设于各所述开口内；每个所述边缘部与其所处的开口的侧壁之间形成露出所述驱动背板的间隔区；
形成覆盖所述第一限定层和位于所述间隔区的驱动背板的第二限定 层，所述第二限定层至少部分露出所述中间部，且在所述间隔区和对应于所述边缘部的区域向所述驱动背板凹陷；
形成至少部分覆盖所述第二限定层和所述中间部的发光功能层；
形成覆盖所述发光功能层的第二电极。
根据本公开的一个方面，提供一种显示装置，包括上述任意一项所述的显示面板。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本公开的第一种显示面板一实施方式的示意图。
图2为本公开的第一种显示面板一实施方式的电镜图。
图3为本公开的第一种显示面板另一实施方式的示意图。
图4为本公开的第二种显示面板第一种实施方式的示意图。
图5为本公开的第二种显示面板一实施方式中第一电极层的俯视图。
图6为本公开的第二种显示面板一实施方式中漏电截断层的俯视图。
图7为本公开的第二种显示面板一实施方式中漏电截断层和第一电极的俯视图。
图8为本公开的第二种显示面板的第二种实施方式的示意图。
图9为本公开的第三种显示面板的一实施方式的示意图。
图10为本公开的第三种显示面板的一实施方式的电镜图。
图11为本公开显示面板的制造方法一实施方式的示意图。
图12为本公开显示面板的制造方法一实施方式的示意图。
附图标记说明：
图1-图3中：
1、驱动背板；101、基底；102、有源区；1021、源极；1022、漏极；103、栅绝缘层；104、栅极；105、第一绝缘层；106、第一走线层；107、第二绝缘层；108、第二走线层；109、平坦层；2、第一电极层；21、第一电极；210、中间部；211、边缘部；2110、平坦部；2111、爬坡部；220、第一导电层；221、第二导电层；222、第三导电层；3、发光功能层；4、第二电极；41、分隔部；4111、第二凹陷区；42、平缓部；411、凸出区；412、第一凹陷区；4121、第一侧面；4122、第二侧面；5、漏电截断层；51、第一限定层；511、开口；52、第二限定层；6、第一封装层；7、彩膜层；8、第二封装层；9、透明盖板。
图4-8中：
100、驱动背板；101、基底；102、有源区；1021、源极；1022、漏极；103、栅绝缘层；104、栅极；105、第一绝缘层；106、第一走线层；107、第二绝缘层；108、第二走线层；109、平坦层；200、第一电极层；201、第一电极；210、中间部；211、边缘部；2110、平坦部；2111、爬坡部；220、第一导电层；221、第二导电层；222、第三导电层；300、漏电截断层；301、第一限定层；3011、第一开口；3012、环形孔；302、第二限定层；3021、第二开口；3022、凹槽；400、发光功能层；401、发光单元层；402、电荷产生层；500、第二电极；501、凹陷区；502、凸出区；503、平缓区；600、第一封装层；700、彩膜层；800、第二封装层；900、透明盖板。
图9和图10中：
100、驱动背板；101、基底；102、有源区；1021、源极；1022、漏极；103、栅绝缘层；104、栅极；105、第一绝缘层；106、第一走线层；107、第二绝缘层；108、第二走线层；109、平坦层；110、环形槽；200、第一电极层；201、第一电极；210、中间部；211、边缘部；2110、平坦部；2111、爬坡部；220、第一导电层；221、第二导电层；222、第三导电层；300、漏电截断层；301、第一限定层；3011、开口；302、第二限定层；400、发光功能层；500、第二电极；501、凹陷区；502、 凸出区；503、平缓区；600、第一封装层；700、彩膜层；800、第二封装层；900、透明盖板。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本公开将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似的结构，因而将省略它们的详细描述。此外，附图仅为本公开的示意性图解，并非一定是按比例绘制。
虽然本说明书中使用相对性的用语，例如“上”“下”来描述图标的一个组件对于另一组件的相对关系，但是这些术语用于本说明书中仅出于方便，例如根据附图中所述的示例的方向。能理解的是，如果将图标的装置翻转使其上下颠倒，则所叙述在“上”的组件将会成为在“下”的组件。当某结构在其它结构“上”时，有可能是指某结构一体形成于其它结构上，或指某结构“直接”设置在其它结构上，或指某结构通过另一结构“间接”设置在其它结构上。
用语“一个”、“一”、“该”、“所述”用以表示存在一个或多个要素/组成部分/等；用语“包括”和“具有”用以表示开放式的包括在内的意思并且是指除了列出的要素/组成部分/等之外还可存在另外的要素/组成部分/等；用语“第一”、“第二”仅作为标记使用，不是对其对象的数量限制。
相关技术中，OLED显示面板包括驱动背板、多个第一电极、像素定义层、发光功能层、第二电极和彩膜层，其中，第一电极阵列分布于驱动背板上；像素定义层设于驱动背板设有第一电极的表面，且露出各个第一电极；发光功能层覆盖像素定义层和第一电极背离驱动背板的表面，第二电极覆盖于发光功能层背离驱动背板的表面，从而可通过像素定义层限定出多个发光器件。在驱动信号的驱动下，第一电极注入的空穴和第二电极注入的电子进入到发光功能层，并形成激子，激子辐射跃迁发射光子从而形成电致发光。彩膜层设于第二电极背离驱动背板的一 侧，且具有一一对应于各个发光器件的多个滤光区，每个滤光区及其对应的发光器件可作为一子像素。
由于像素定义层的厚度大于第一电极，在通过蒸镀工艺形成发光功能层时，在第一电极与像素定义层交界处，即在发光器件的边缘位置，发光功能层会出现凹陷，从而使第二电极相应的形成凹陷区，第二电极的凹陷区与第一电极的距离较近，容易出现尖端放电，甚至短路，影响发光器件的稳定性，从而使显示面板难以稳定发光。同时，第二电极的凹陷区与第一电极对应，因而也会发射光线，但由于凹陷区的形貌为向驱动背板凹陷的结构，而非平面结构，使得该凹陷区的范围内发射的光线为散射状态，且至少部分光线向相邻的子像素偏斜，使得相邻的子像素的发光互相干扰，影响显示效果。
发光功能层在第二电极在第一电极与像素定义层的交界处凹陷，使第二电极在对应该凹陷的区域形成凹陷区，该凹陷区与第一电极正对，即凹陷区在驱动背板的正投影位于第一电极内，使得二者之间可能会出现尖端放电，甚至短路。同时，凹陷区会发光，且由于凹陷区的形貌为弯曲状，使得其发出的光线呈散射状态，从而对相邻的子像素的发光产生干扰。
此外，由于发光功能层为整层连续的膜层，使得子像素之间相互连接，发光功能层中的至少一部分膜层(包括但不限于空穴注入层)会使相邻的子像素之间产生串扰。特别地，对于串联式OLED显示面板，发光功能层包括多个发光单元层，相邻的两层发光单元层通过电荷产生层串联。但是，电荷产生层具有良好电荷传导特性，会使相邻的子像素之间产生串扰，影响发光效果。
为了解决上述相关技术中的至少一个技术问题，本公开的实施方式提供了三种显示面板。
第一种显示面板
如图1-图3所示，显示面板可包括驱动背板1、第一电极层2、发光功能层3和第二电极4，其中：
第一电极层2设于驱动背板1的一面，且包括阵列分布的多个第一 电极21，第一电极21包括平坦的中间部210和围绕中间部210的边缘部211；边缘部211包括围绕中间部210的平坦部2110以及连接于中间部210和平坦部2110之间的爬坡部2111，平坦部2110的厚度小于中间部210。
发光功能层3至少部分覆盖第一电极21。
第二电极4覆盖发光功能层3，且包括分隔部41和被分隔部41分隔的多个平缓部42，各平缓部42在驱动背板1上的正投影一一对应的位于各第一电极21以内；分隔部41包括凸出区411以及连接凸出区411和平缓部42的第一凹陷区412，第一凹陷区412向平缓部42靠近驱动背板1的一侧凹陷，凸出区411向平缓部42背离驱动背板1的一侧凸起。第一凹陷区412在驱动背板1上的正投影至少部分位于第一电极21的中间部210以外。
本公开实施方式的显示面板，每个第一电极21及其对应的发光功能层3和第二电极4可构成一发光器件，可进行发光。通过使第二电极4的第一凹陷区412在驱动背板1上的正投影至少部分位于第一电极21以外，而不与第一电极21正对，可降低第一凹陷区412与第一电极21之间发生尖端放电的风险，有利于保证发光器件稳定发光。同时，可减少第一凹陷区412的范围内发光，从而降低相邻发光器件发光的互相干扰。
如图2所示，图2为本公开第一种显示面板一实施方式的局部电镜图，可以看出，第一凹陷区412在驱动背板1的正投影至少部分位于第一电极21的范围外，可降低与第一电极21之间出现尖端放电的风险。同时，可减少甚至避免第一凹陷区412发光，防止对相邻的子像素产生干扰。
下面对本公开显示面板的各部分进行详细说明：
如图1所示，驱动背板1可包括多个驱动晶体管，用于驱动各个发光器件发光，以显示图像。以一个顶栅结构的驱动晶体管为例，驱动背板1包括基底101、栅绝缘层103、栅极104、第一绝缘层105和第一走线层106，其中：该基底101的材料可为单晶硅或多晶硅等，在此不做特殊限定；基底101可包括有源区102和位于有源区102两端的源极 1021和漏极1022。栅绝缘层103覆盖有源区102；栅极104设于栅绝缘层103背离基底101的表面。第一绝缘层105覆盖栅极104和基底101，其材料可包括氧化硅和氮化硅中至少一个。第一走线层106设于第一绝缘层105背离基底101的表面，且栅极104、源极1021和漏极1022均通过钨或其它金属填充的过孔与第一走线层106连接。
此外，驱动背板1还可包括第二绝缘层107和第二走线层108，第二绝缘层107覆盖第一走线层106和第一绝缘层105，第二走线层108设于第二绝缘层107背离基底101的表面，第二走线层108的具体图案在此不做特殊限定，其可通过钨或其它金属填充的过孔与第一走线层106连接。同时，第二走线层108上可覆盖平坦层109，第一电极层2可设于该平坦层109背离基底101的表面，且第一电极21可通过钨或其它金属填充的过孔与第二走线层108连接。
如图1所示，第一电极层2设于驱动背板1的一面，且包括多个第一电极21，第一电极21阵列分布。举例而言，第一电极层2的各第一电极21阵列分布于平坦层109背离基底101的表面，相邻的第一电极21间隔设置。
在平行于驱动背板1的方向上，第一电极21可包括中间部210和围绕中间部210边缘部211，其中，中间部210平坦结构，即中间部210与驱动背板1大致平行。例如，中间部210设于平坦层109背离基底101的表面，且与平坦层109背离基底101的表面平行。
边缘部211可包括平坦部2110以及爬坡部2111，其中，平坦部2110位于驱动背板1上，并围绕中间部210设置，且平坦部2110与驱动背板1大致平行。例如，平坦部2110位于平坦层109背离基底101的表面，且与与平坦层109背离基底101的表面平行。同时，平坦部2110的厚度小于中间部210的厚度。
爬坡部2111连接于中间部210和平坦部2110之间，即爬坡部2111围绕中间部210，平坦部2110围绕爬坡部2111设置，爬坡部2111相对于驱动背板1的坡度不小于30°，该坡度为爬坡部2111的表面与驱动背板1的夹角。
在本公开的一些实施方式中，在垂直于驱动背板1的方向上，第一 电极21可为多层结构，例如，第一电极21可包括第一导电层220、第二导电层221和第三导电层222，其中：
第一导电层220设于平坦层109背离基底101的表面；第二导电层221设于第一导电层220背离驱动背板1的表面；第三导电层222设于第二导电层221背离驱动背板1的表面，并以一定的坡度延伸至驱动背板1，再沿驱动背板1延伸一定的距离，从而包覆第一导电层220和第二导电层221，对第一导电层220和第二导电层221进行保护。示例性的，第一导电层220的材料可包括钛(Ti)、第二导电层221的材料包括银(Ag)、第三导电层222的材料包括氧化铟锡(ITO)，当然，各导电层也可以采用其他材料。
第一电极21的中间部210包括第三导电层222位于第二导电层221背离驱动背板1的表面的区域以及该区域在驱动背板1的正投影范围内的第一导电层220和第二导电层221。平坦部2110包括第三导电层222沿驱动背板1延伸的区域。爬坡部2111包括第三导电层222向驱动背板1延伸的具有一定坡度的区域，以及该区域在驱动背板1的正投影范围内的第一导电层220和第二导电层221。
如图1所示，发光功能层3可为连续的膜层，且同时覆盖各第一电极21的至少部分区域。在本公开的一些实施方式中，发光功能层3包括一层发光单元层，发光单元层包括由第一电极21向背离驱动背板1的方向依次层叠的空穴注入、空穴传输层、发光层、电子传输层和电子注入层。
在本公开的另一实施方式中，发光功能层3包括多层发光单元层，每层发光单元层的空穴注入、空穴传输层、发光层、电子传输层和电子注入层的分布方式相同。同时，相邻两发光单元层之间设有电荷产生层，从而通过电荷产生层将各发光单元层串联，以便形成串联式的OLED发光器件。
如图1所示，第二电极4覆盖发光功能层3，可向第一电极21和第二电极4施加驱动信号，使发光功能层3位于第一电极21和第二电极4之间的部分发光。第二电极4包括分隔部41和多个平缓部42，其中：
各平缓部42阵列分布，且与各第一电极21的中间部210一一对应 设置，即各平缓部42在驱动背板1上的正投影一一对应的位于各第一电极21的中间部210以内。平缓部42平行或大致平行于中间部210。
分隔部41与驱动背板1未被中间部210覆盖的区域对应，用于分隔平缓部42。分隔部41包括凸出区411和第一凹陷区412，其中：
凸出区411向平缓部42背离驱动背板1的一侧凸出，第一凹陷区412向平缓部42靠近驱动背板1的一侧凹陷。第一凹陷区412连接于凸出区411和平缓部42之间，即第一凹陷区412为环形结构，且数量为多个，各个第一凹陷区412一一对应的围绕各平缓部42，并与凸出区411连接，也就是说，第一凹陷区412为凸出区411和平缓部42的过渡区域。
第一凹陷区412在驱动背板1上的正投影至少部分位于第一电极21的中间部210以外，从而与第一电极21以外的区域或厚度较小的边缘部211正对，而不与厚度较大的中间部210正对，可降低第二电极4的第一凹陷区412与第一电极21之间出现尖端放电和短路的风险，从而提高发光器件发光的稳定性。
在本公开的一些实施方式中，在垂直于驱动背板的截面上，第一凹陷区412的最低点在驱动背板1上的正投影位于中间部210以外，例如，该最低点与爬坡部2111和平坦部2110之一对应，以避免与中间部210之间发生尖端放电。第一凹陷区412在垂直于驱动背板1的截面上的最低点为：在垂直于驱动背板1的截面上，第一凹陷区412距离第一电极21最近的一点，也即距离平缓部42最远的一点。
需要说明的是，本公开的实施方式中，第一凹陷区412在垂直于驱动背板1的截面的数量可以有多个，不同截面上的最低点可能不同，例如，该最低点可以是深度方向上距离第一电极21最近的一点，也可以是深度方向上的其它点，具体视垂直于驱动背板1的截面的位置而定。
如图1所示，在本公开的一些实施方式中，第一凹陷区412具有两个侧面，包括第一侧面4121和第二侧面4122，其中，第一侧面4121与平缓部42相接，第二侧面4122与凸出区411相接。第一侧面4121和第二侧面4122可沿靠近驱动背板1的方向收缩。第一侧面4121和第二侧面4122可以是曲面或平面，在此不做特殊限定。
进一步的，如图1所示，在本公开的一些实施方式中，第一凹陷区412在驱动背板1上的正投影的宽度S不大于0.2μm，即第一凹陷区412的最大宽度不大于0.2μm，例如0.1μm、0.2μm等。可避免第一凹陷区412的宽度过大而使第一凹陷区412在驱动背板1的正投影与第一电极21存在重合区域或重合区过大，进一步防止尖端放电的发生。
进一步的，如图1所示，在本公开的一些实施方式中，第一凹陷区412的深度小于第二电极4最大厚度的两倍，举例而言，第二电极4的最大厚度为90nm，第一凹陷区412的深度小于180nm，例如120nm、100nm、80nm、70nm、60nm、50nm、40nm等。第一凹陷区412的深度指第一凹陷区412的最大深度，即：在垂直于驱动背板1的方向上，第一凹陷区412距离驱动背板1最近的一点与平缓部42背离驱动背板1的表面的距离。
进一步的，在本公开的一些实施方式中，每个第一凹陷区412在驱动背板1的正投影围绕于一第一电极21的中间部210外，第一凹陷区412的底部与相邻的第一电极21的中间部210的距离的最小值(在垂直于驱动背板1的方向上，第一凹陷区412距离中间部210最近的一点与中间部210的距离)不小于平缓部42和发光功能层3的总厚度的70％，平缓部42和发光功能层3的总厚度为平缓部42和发光功能层3的厚度之和，例如，平缓部42和发光功能层3的总厚度约为365nm，则第一凹陷区412在垂直于驱动背板1的方向的底部与相邻的第一电极21的中间部210距离的最小值的最大值约为255nm。
进一步的，第一凹陷区412的底部与相邻的第一电极21的中间部210的距离的最大值(在垂直于驱动背板1的方向上，第一凹陷区412距离中间部210最近的一点与中间部210的距离)的最大值不小于400nm，且该最大值不大于450nm。
进一步的，如图1所示，第一侧面4121相对于第一电极21的中间部210的坡度小于第二侧面4122相对于中间部210的坡度，也就是说，第一侧面4121比第二侧面4122平缓。举例而言，第一侧面4121相对于中间部210的坡度可小于60°，例如，50°、45°、40°、30°等；第二侧面4122相对于中间部210的坡度不小于60°，且不大于90°，例 如60°、75°、90°等。其中，第一侧面4121相对于中间部210的坡度为：第一侧面4121的延伸面与中间部210背离驱动背板1的表面的延伸面的夹角α；第二侧面4122相对于中间部210的坡度为：第二侧面4122的延伸面与中间部210背离驱动背板1的表面的延伸面的夹角β。
进一步的，在本公开的一些实施方式中，第一侧面4121相对于中间部210的坡度小于第二侧面4122相对于中间部210的坡度，且第二电极4对应于第一侧面4121的区域的最小厚度大于第二电极4对应于第二侧面4122的区域的最小厚度。
当然，在本公开的其它实施方式中，第一侧面4121相对于中间部210的坡度也可等于第二侧面4122相对于中间部210的坡度。
在本公开的一些实施方式中，凸出区411具有向驱动背板1凹陷的第二凹陷区4111，第二凹陷区4111的深度小于第一凹陷区412的深度。
为了便于形成上文中的第二电极4，在本公开的一些实施方式中，本公开的显示面板还包括漏电截断层5，漏电截断层5为绝缘材质，且与第一电极层2设于驱动背板1的同一面，且漏电截断层5至少部分露出各第一电极21，例如，漏电截断层5设有多个至少部分露出中间部210的开口。发光功能层3覆盖漏电截断层5，并延伸至开口内，从而覆盖中间部210的至少一部分，通过漏电截断层5可使发光功能层3具有用于形成第二电极4的第一凹陷区412的凹坑。
如图1和图2所示，在本公开的一些实施方式中，漏电截断层5包括第一限定层51和第二限定层52，其中：
第一限定层51与第一电极层2设于驱动背板1的同一面，且第一限定层51具多个开口511，各第一电极21一一对应的设于各开口511内；每个第一电极21的边缘部211与其所处的开口511的侧壁之间形成露出驱动背板1的间隔区X。
在本公开的一些实施方式中，平坦层109、第一限定层301和第二限定层52的材料可以包括氧化硅、氮化硅，且三者的材料相同，举例而言：平坦层109、第一限定层51和第二限定层52均为氧化硅。在通过刻蚀工艺形成第一限定层51时，间隔区X的位置发生过刻蚀，过刻蚀的区域沿开口511的侧壁延伸至驱动背板1内，使得驱动背板1位于 间隔区X的至少部分区域也被刻蚀，从而形成环形槽110，即对平坦层109造成刻蚀。
第二限定层52覆盖第一限定层51以及驱动背板1位于间隔区X的区域，并至少部分露出第一电极21的中间部210，且第二限定层52在间隔区X和对应于边缘部211的区域向驱动背板1凹陷；且第二限定层52的厚度小于第一限定层51的厚度；
发光功能层3覆盖第二限定层52，且由于蒸镀工艺的限制，发光功能层3在对应于间隔区X和边缘部211的区域形成凹坑，第二电极4在凹坑处凹陷，形成第一凹陷区412，使得第一凹陷区412在驱动背板1的正投影至少部分位于间隔区X或边缘部211的范围内，从而位于中间部210以外，避免与中间部210之间发生放电。进一步的，第一凹陷区412在垂直于驱动背板1的截面上的最低点在驱动背板1的正投影位于间隔区X或边缘部211的范围内。
如图3所示，在本公开的另一些实施方式中，漏电截断层5包括第一限定层51和第二限定层52，其中：
第一限定层51和第一电极层2设于驱动背板1的同一面，第二限定层52设于第一限定层51背离驱动背板1的表面，第一限定层51和第二限定层52均至少部分露出第一电极21的中间部210，第一限定层51在驱动背板1的正投影与边缘部211的边界对接或覆盖边缘部211和中间部210的边缘；第二限定层52在驱动背板1上的正投影的边界位于中间部210以外，使得第二限定层52可视为形成于第一限定层51背离驱动背板1的表面上的凸棱。
发光功能层3覆盖第二限定层52，且由于蒸镀工艺的限制，发光功能层3在第二限定层52露出第一电极21的区域的侧壁形成凹坑，该凹坑与第一限定层51未被第二限定层52覆盖的区域对应，且在驱动背板1的正投影位于第一电极21的中间部210以外。同时，发光功能层3在对应第二限定层52的位置形成凸起结构。
上述的第一限定层51和第二限定层52可采用相同的材料，并可通过一次构图工艺形成；或者，第一限定层51和第二限定层52也可分别独立形成，且二者可采用不同的材料。
第二电极4覆盖发光功能层3时，第二电极4在发光功能层3的凹坑处下凹，形成第一凹陷区412，在凸起结构的位置形成凸出区411。第一凹陷区412在驱动背板1的正投影位于中间部210和第二限定层52在驱动背板1的正投影之间，第二限定层52位于凸出区411在漏电截断层5的正投影位于以内。
此外，如图1和图3所示，本公开的第一种显示面板还可包括第一封装层6、彩膜层7、第二封装层8和透明盖板9，其中：
第一封装层6可覆盖第二电极4，举例而言，第一封装层6可包括两层无机层和两层无机层之间的有机层。
彩膜层7设于第一封装层6背离第二电极4的一侧，且彩膜层7包括一一对应于各第一电极21的滤光区，滤光区的颜色有多种，例如红色、蓝色和绿色。
第二封装层8可覆盖彩膜层7，其结构可与第一封装层6相同。
透明盖板9可覆盖第二封装层8，其材质可以是玻璃或材料。
第二种显示面板
如图4所示，该显示面板包括驱动背板100、第一电极层200、漏电截断层300、发光功能层400和第二电极500，其中：
第一电极层200设于驱动背板100的一面，且包括阵列分布的多个第一电极201；第一电极201包括平坦的中间部210和围绕中间部210的边缘部211；边缘部211包括围绕中间部210的平坦部2110以及连接于中间部210和平坦部2110之间的爬坡部2111，平坦部2110的厚度小于中间部210。
漏电截断层300与第一电极层200设于驱动背板100的同一面，且漏电截断层300包括向背离驱动背板100的方向依次层叠的第一限定层301和第二限定层302，第一限定层301设有一一对应露出各第一电极201的中间部210的第一开口3011，第二限定层302对应于第一开口3011的位置设有围绕于第一开口3011外的第二开口3021，第二限定层302在驱动背板100的正投影与中间部210间隔设置；第一限定层301设有一一对应的围绕各第一开口3011的多个盲孔结构的环形孔3012， 第二限定层302设于第一限定层301背离驱动背板100的表面，且位于环形孔3012以外；
发光功能层400至少部分覆盖漏电截断层300和第一电极201的中间部210；
第二电极500覆盖发光功能层400。
本公开实施方式的显示面板，每个第一电极201及其对应的发光功能层400和第二电极500可构成一发光器件，以便发光。
由于第二开口3021围绕于第一开口3011外，即第二开口3021大于第一开口3011，二者可构成一台阶孔，使得第一限定层301存在位于第二开口3021内且被第二开口3021露出的区域。同时，由于第二限定层302在驱动背板100的正投影与第一电极201的中间部210间隔设置，且位于环形孔3012外。若发光功能层400因工艺问题，而在与第二开口3021侧壁接触的区域形成的凹坑时，可使凹坑至少部分与第一限定层301被第二开口3021露出的环形孔3012对应，而不会与第一电极201的中间部210对应。
相应的，第二电极500在该凹坑处凹陷后形成的凹陷区501在垂直于驱动背板1的截面上的最低点也不与中间部210对应，即在第二电极500的凹陷区501在垂直于驱动背板1的截面的最低点在驱动背板100上的正投影位于中间部210以外，也即位于发光器件以外，从而可防止凹陷区501与第一电极201的中间部210之间发生尖端放电，甚至短路，有利于保证发光器件稳定发光。同时，可避免凹陷区501的范围内发光，从而降低相邻发光器件发光的互相干扰。
下面对本公开实施方式第二种显示面板的各部分进行详细说明
如图4所示，驱动背板100可包括多个驱动晶体管，用于驱动各个发光器件发光，以显示图像。以一个顶栅结构的驱动晶体管为例，驱动背板100包括基底101、栅绝缘层103、栅极104、第一绝缘层105和第一走线层106，其中：该基底101的材料可为单晶硅或多晶硅等，在此不做特殊限定；基底101可包括有源区102和位于有源区102两端的源极1021和漏极1022。栅绝缘层103覆盖有源区102；栅极104设于栅绝缘层103背离基底101的表面。第一绝缘层105覆盖栅极104和基底101， 其材料可包括氧化硅和氮化硅中至少一个。第一走线层106设于第一绝缘层105背离基底101的表面，且栅极104、源极1021和漏极1022均通过钨或其它金属填充的过孔与第一走线层106连接。
此外，驱动背板100还可包括第二绝缘层107和第二走线层108，第二绝缘层107覆盖第一走线层106和第一绝缘层105，第二走线层108设于第二绝缘层107背离基底101的表面，第二走线层108的具体图案在此不做特殊限定，其可通过钨或其它金属填充的过孔与第一走线层106连接。同时，第二走线层108上可覆盖平坦层109，第一电极层200可设于该平坦层109背离基底101的表面，且第一电极201可通过钨或其它金属填充的过孔与第二走线层108连接。
如图4所示，第一电极层200设于驱动背板100的一面，且包括多个第一电极201，第一电极201阵列分布。举例而言，第一电极层200的各第一电极201阵列分布于平坦层109背离基底101的表面，相邻的第一电极201间隔设置。
在平行于驱动背板100的方向上，第一电极201可包括中间部210和围绕中间部210边缘部211，其中，中间部210平坦结构，即中间部210与驱动背板100大致平行。例如，中间部210设于平坦层109背离基底101的表面，且与平坦层109背离基底101的表面平行。
边缘部211可包括平坦部2110以及爬坡部2111，其中，平坦部2110位于驱动背板100上，并围绕中间部210设置，且平坦部2110与驱动背板100大致平行。例如，平坦部2110位于平坦层109背离基底101的表面，且与与平坦层109背离基底101的表面平行。同时，平坦部2110的厚度小于中间部210的厚度。
爬坡部2111连接于中间部210和平坦部2110之间，即爬坡部2111围绕中间部210，平坦部2110围绕爬坡部2111设置，爬坡部2111相对于驱动背板100的坡度不小于30°，该坡度为爬坡部2111的表面与驱动背板100的夹角。
在本公开的一些实施方式中，第一电极201包括平坦的中间部210和围绕中间部210的边缘部211，凹陷区501在垂直于驱动背板1的截面上的最低点在驱动背板100上的正投影位于第一电极201的中间部 210以外。
第一电极201包括第一导电层220、第二导电层221和第三导电层222，第一导电层220设于平坦层109背离基底101的表面，第二导电层221设于第一导电层220背离驱动背板100的表面，第三导电层222设于第二导电层221背离驱动背板100的表面，并以一定的坡度延伸至驱动背板100，从而包覆第一导电层220和第二导电层221，对第一导电层220和第二导电层221进行保护。
第一电极201的中间部210包括第三导电层222位于第二导电层221背离驱动背板100的表面的区域以及第一导电层220和第二导电层221，边缘部211包括第三导电层222包覆第一导电层220和第二导电层221边缘的区域，即向驱动背板100延伸的区域。示例性的，第一导电层220的材料可包括钛(Ti)、第二导电层221的材料包括银(Ag)、第三导电层222的材料包括氧化铟锡(ITO)，当然，也可以采用其他材料。
如图4所示，漏电截断层300为绝缘材质，且与第一电极层200设于驱动背板100的同一面，例如设于平坦层109背离基底101的表面。漏电截断层300包括第一限定层301和第二限定层302，其中：
第一限定层301与第一电极层200设于驱动背板100的同一面，且第一限定层301设有一一对应露出各中间部210的第一开口3011，且至少露出中间部210的部分区域，第一限定层301覆盖边缘部211。在本公开的一些实施方式中，第一限定层301可覆盖第一开口3011的边缘可与中间部210边缘重叠，且第一限定层301的厚度可大于、等于或小于第一电极201的厚度。此外，在本公开的另一些实施方式中，第一开口3011也可小于中间部210，第一限定层301的厚度大于中间部210的厚度，使得第一限定层301覆盖第一电极201中间部210的边缘和边缘部211，从而防止第一电极201边缘的毛刺产生尖端放电。
如图6和图7所示，第一限定层301可设有一一对应地围绕各第一开口3011的多个环形孔3012，环形孔3012为盲孔结构，即向驱动背板100凹陷，但不露出驱动背板100。第二限定层302设于第一限定层301背离驱动背板100的表面未被环形孔3012围绕的区域，即位于环形孔 3012以外，以免遮挡环形孔3012。通过设置环形孔3012有利于进一步截断发光功能层400的电荷产生层402，避免相邻发光器件间的串扰。
第二限定层302设于第一限定层301背离驱动背板100的表面，第二限定层302在驱动背板100的正投影与第一电极201的中间部210间隔分布，使第二限定层302在驱动背板100的正投影位于中间部210以外。同时，第二限定层302对应于第一开口3011的位置设有围绕于第一开口3011外的第二开口3021，使得任一第一开口3011和围绕该第一开口3011的第二开口3021可构成一台阶孔，第二开口3021露出第一限定层301位于第二开口3021内的区域。
上述的第一限定层301和第二限定层302可采用相同的材料，并可通过一次构图工艺形成；或者，第一限定层301和第二限定层302也可分别独立形成，且二者可采用不同的材料。
如图4所示，发光功能层400可为连续的膜层，且同时至少部分覆盖各第一电极201的中间部210。在本公开的一实施方式中，如图4所示，发光功能层400包括多层发光单元层401，每层发光单元层401的空穴注入层、空穴传输层、发光层、电子传输层和电子注入层的分布方式相同。同时，相邻两发光单元层401之间设有电荷产生层402，从而通过电荷产生层402将各发光单元层401串联，以便形成串联式的OLED发光器件。
在本公开的另一些实施方式中，发光功能层400包括一层发光单元层，发光单元层包括由第一电极201向背离驱动背板100的方向依次层叠的空穴注入层、空穴传输层、发光层、电子传输层和电子注入层。
在采用蒸镀工艺形成发光功能层400时，发光功能层400位于第二开口3021内的部分的边缘沿第二开口3021的侧壁向驱动背板100凹陷，形成凹坑，该凹坑可与第二开口3021露出的环形孔3012对应。同时，发光功能层400对应于第二限定层302的区域形成凸起结构。
如图4所示，第二电极500覆盖发光功能层400，可向第一电极201和第二电极500施加驱动信号，使发光功能层400位于第一电极201和第二电极500之间的部分发光。
第二电极500的形貌与发光功能层400相匹配，其在发光功能层 400的凹坑处凹陷，形成凹陷区501，并在对应与第二限定层302的凸起结构的区域形成凸出区502，凹陷区501与环形孔3012的对应，使凹陷区501在驱动背板100上的正投影至少部分位于第一电极201的中间部210以外，减少或避免与第一电极201与第二电极500的凹陷区501发生尖端放电。此外，第二电极500对应于中间部210的区域为平缓区503。凹陷区501、凸出区502和平缓区503的连接关系可参考上述第一种显示面板的实施方式中的凸出区411、第一凹陷区412和平缓部42，在此不再详述。
进一步的，如图4和图5所示，在本公开的一些实施方式中，为了确保第二电极500的凹陷区501在垂直于驱动背板1的截面上的最低点在驱动背板100的正投影完全位于中间部210以外，第二开口3021的侧壁和该第二开口3021围绕的中间部210的边缘在平行于中间部210的方向上的间距L不小于相邻两第一电极201的中间部210最大间距H的1/5，例如，相邻两中间部210最大间距为1μm，L为0.2μm、0.1μm等，使得凹陷区501在第一限定层301的正投影位于第二开口3021的侧壁和中间部210之间，即凹陷区501在驱动背板100的正投影完全位于中间部210以外，进一步避免出现尖端放电。
在本公开的另一些实施方式中，如图4所示，第二开口3021的侧壁可垂直于驱动背板100，使得第二限定层302位于两个中间部210之间的部分的横截面呈矩形。
在本公开的另一些实施方式中，如图8所示，第二开口3021的侧壁向背离驱动背板100的方向扩张，使得第二限定层302位于两个中间部210之间的部分的横截面呈梯形。同时，第二开口3021的侧壁与中间部210的夹角，即第二开口3021的侧壁的延伸面与中间部210背离驱动背板100的表面的延伸面的夹角γ，不小于60°，且不大于90°，例如60°、65°、70°、80°或90°。
对于串联式OLED显示面板而言，为了避免相邻两个发光器件之间出现串扰，可通过漏电截断层300将发光器件的电荷产生层402截断。当然，还可将空穴注入层或其它膜层截断，防止串扰。
如图4所示，在本公开的一些实施方式中，发光功能层400包括多 层发光单元层401，每层发光单元层401的空穴注入层、空穴传输层、发光层、电子传输层和电子注入层的分布方式相同。同时，相邻两发光单元层401之间设有电荷产生层402，从而通过电荷产生层402将各发光单元层401串联，以便形成串联式的OLED发光器件。
在垂直于驱动背板100的方向上，第二限定层302背离驱动背板100的表面与第一电极201的中间部210背离驱动背板100的表面的距离，即第二限定层302相对于中间部210的高度，不小于发光功能层400的厚度的25％，且不大于发光功能层400的厚度的80％，第二限定层302形成的段差可使发光功能层400的电荷产生层402或者空穴注入层等导电性较强的膜层断开，从而避免相邻的发光器件出现串扰。例如：若发光功能层400的厚度为400nm，则第二限定层302相对于中间部210的高度不超过320nm，且不小于100nm。若发光功能层400的厚度为300nm，则第二限定层302相对于中间部210的高度不超过75nm，且不小于25nm。
进一步的，如图4、图6和图7所示，第二限定层302位于第二开口3021以外的区域可设有凹槽3022，可通过该凹槽3022对电荷产生层402进行阻碍，有利于进一步截断电荷产生层402，更好的防止串扰。凹槽3022形状和结构在此不做特殊限定，其深度小于凹陷区501的深度。凹槽3022的数量可以是一个，也可以是呈同心环形分布的多个。
进一步的，如图4所示，凹槽3022的宽度小于相邻两第一电极201的中间部210的间距，例如相邻两中间部210的间距为0.1μm-1μm，则凹槽3022的最大宽度为1μm。同时，为了保证凹槽3022的截断效果，可使其宽度大于0.2μm，使得凹槽3022具有一定的跨度，使电荷产生层402能因凹槽3022的存在而被截断。
此外，在本公开的第一种显示面板还可包括第一封装层600、彩膜层700、第二封装层800和透明盖板900，其中，第一封装层600可覆盖第二电极500，举例而言，第一封装层600可包括两层无机层和两层无机层之间的有机层。
彩膜层700设于第一封装层600背离第二电极500的一侧，且彩膜层700包括一一对应于各第一电极201的滤光区，滤光区的颜色有多种， 例如红色、蓝色和绿色。
第二封装层800可覆盖彩膜层700，其结构可与第一封装层600相同。
透明盖板900可覆盖第二封装层800，其材质可以是玻璃或材料。
第三种显示面板
如图9和图10所示，第三种显示面板可包括驱动背板100、第一电极层200、漏电截断层300、发光功能层400和第二电极500，其中：
第一电极层200设于驱动背板100的一面，且包括阵列分布的多个第一电极201；第一电极201包括平坦的中间部210和围绕中间部210的倾斜的边缘部211。边缘部211包括围绕中间部210的平坦部2110以及连接于中间部210和平坦部2110之间的爬坡部2111，平坦部2110的厚度小于中间部210。
漏电截断层300包括第一限定层301和第二限定层302，第一限定层301与第一电极层200设于驱动背板100的同一面，且具多个开口3011，各第一电极201一一对应的设于各开口3011内，即第一限定层301的每个开口3011内设有一第一电极201。每个第一电极201的边缘部211与其所处的开口3011的侧壁之间形成露出驱动背板100的间隔区X。第二限定层302覆盖第一限定层301和位于间隔区X的驱动背板100，并露出第一电极201的中间部210，且第二限定层302在间隔区X和对应于边缘部211的区域向驱动背板100凹陷，即第二限定层302与第一限定层301和驱动背板100的表面随形贴合。
发光功能层400至少覆盖第二限定层302和第一电极201的中间部210；第二电极500覆盖发光功能层400。
本公开的第三种显示面板，由于第二限定层302在间隔区X向驱动背板100凹陷，可使发光功能层400因工艺问题形成的凹坑位于与间隔区X或边缘部211对应的位置，而不会与中间部210对应，相应的，第二电极500在该凹坑处凹陷后形成的凹陷区501也不与中间部210对应，即在第二电极500的凹陷区501在垂直于驱动背板1的截面上的最低点在驱动背板100上的正投影位于中间部210以外，也即位于发光器件以 外，从而可防止第二电极500在凹陷区501与中间部210之间发生尖端放电，甚至短路，有利于保证发光器件稳定发光。同时，可避免凹陷区501的范围内发光，从而降低相邻发光器件发光的互相干扰。
下面对第三种显示面板的进行详细说明
如图9和图10所示，第三种显示面板的驱动背板100和第一电极层200的具体结构可参考上述的第二种显示面板，在此不再详述。
在本公开的一些实施方式中，驱动背板100包括基底101、驱动晶体管和平坦层109，其中：基底101可为硅基底，驱动晶体管设于基底101一侧；平坦层109设于驱动晶体管背离基底101的一侧；第一电极层200和漏电截断层300设于平坦层109背离基底101的表面。
具体而言，驱动背板100可为硅基背板，可包括基底101、栅绝缘层103、栅极104、第一绝缘层105、第一走线层106、第二绝缘层107、第二走线层108和平坦层109，基底101包括有源区102、有源区102具有源极1021和漏极1022，具体结构可参考第二种显示面板的实施方式。第一限定层301和第一电极201可设于平坦层109背离基底101的表面。平坦层109、第一限定层301和第二限定层302的材料均可以包括氧化硅、氮化硅等绝缘材料。
在本公开的一些实施方式中，第一限定层301的厚度可大于第一电极层200，以便截断发光功能层400中的空穴注入层等能在相邻两个子像素之间产生串扰的膜层。
在本公开的一些实施方式中，第一电极201包括第一导电层220、第二导电层221和第三导电层222，第一导电层220设于平坦层109背离基底101的表面，第二导电层221设于第一导电层220背离驱动背板100的表面，第三导电层222设于第二导电层221背离驱动背板100的表面，并以一定的坡度延伸至驱动背板100，从而包覆第一导电层220和第二导电层221，对第一导电层220和第二导电层221进行保护。其中，第一电极201的中间部210包括第三导电层222位于第二导电层221背离驱动背板100的表面的区域以及第一导电层220和第二导电层221，边缘部211包括第三导电层222包覆第一导电层220和第二导电层221边缘的区域，即向驱动背板100延伸的区域。示例性的，第一导电层 220的材料可包括钛(Ti)、第二导电层221的材料包括银(Ag)、第三导电层222的材料包括氧化铟锡(ITO)，当然，也可以采用其他材料。
在本公开的一些实施方式中，第二限定层302的厚度小于第一限定层301，进一步的，第二限定层302的厚度可小于第一限定层301厚度的1/5，可避免将间隔区X和边缘部211填平，而无法形成凹陷结构。举例而言，第一限定层301的厚度约为350nm，第二限定层302的厚度不大于70nm，例如，第二限定层302的厚度60nm、50nm等。
在本公开的一些实施方式中，驱动背板100在每个间隔区X内设有围绕第一电极201的环形槽110，第二限定层302位于间隔区X的部分凹陷至环形槽110内。例如，环形槽110形成于平坦层109上，环形槽110的深度小于平坦层109的厚度，具体厚度在此不做特殊限定。
具体而言，平坦层109、第一限定层301和第二限定层302的材料可以包括氧化硅、氮化硅，且三者的材料相同，举例而言：平坦层109、第一限定层301和第二限定层302均为氧化硅。在通过刻蚀工艺形成第一限定层301时，间隔区X的位置发生过刻蚀，过刻蚀的区域沿开口3011的侧壁延伸至驱动背板100内，使得驱动背板100位于间隔区X的至少部分区域也被刻蚀，从而形成环形槽110，即对平坦层109造成刻蚀。在本公开的一些实施方式中，环形槽110在驱动背板100的正投影与间隔区X重合，也就是说，环形槽110的侧壁即为间隔区X的边界。当然，但过刻蚀的区域可小于间隔区X，使得环形槽110的侧壁与第一电极201的边缘部211可具有一定的距离在本公开的一些实施方式中，第二电极500覆盖开口3011侧壁的区域相对于第一电极201的中间部210的坡度α不小于65°，且不大于90°，例如60°、75°、90°等。第二电极500位于中间部210和环形槽110之间的区域相对于中间部210的坡度β小于60°，例如，50°、45°、40°、30°等。
如图9和图10所示，发光功能层400覆盖第二限定层302和第一电极201的至少部分区域，在采用蒸镀工艺形成发光功能层400时，发光功能层400位于间隔区X内的部分的向驱动背板100凹陷，形成凹坑。同时，发光功能层400对应于第一限定层301的区域形成凸起结构。发 光功能层400的具体细节可参考第二种显示面板的实施方式，在此不再详述。
如图9和图10所示，第二电极500覆盖发光功能层400，且在发光功能层400的凹坑处凹陷，形成凹陷区501，由于凹坑的限制，该凹陷区501在垂直于驱动背板1的截面的最低点在驱动背板100上的正投影位于间隔区X或边缘部211的范围内，即位于中间部210以外，也即位于发光器件以外，从而可防止第二电极500在凹陷区501与第一电极201之间发生尖端放电，甚至短路，有利于保证发光器件稳定发光。同时，可避免凹陷区501的范围内发光，从而降低相邻发光器件发光的互相干扰。此外，第二电极500对应于第一限定层301的区域为凸出区502，第二电极500对应于中间部210的区域为平缓区503。凹陷区501、凸出区502和平缓区503的连接关系可参考上述第一种显示面板的实施方式中的凸出区411、第一凹陷区412和平缓部42，在此不再详述
此外，如图9和图10所示，本公开的显示面板还可包括第一封装层600、彩膜层700、第二封装层800和透明盖板900，具体结构可参考上述的第一种和第二种显示面板的实施方式，在此不再详述。
本公开实施方式还提供一种显示面板的制造方法，该显示面板可为上述的第二种显示面板，如图11所示，该制造方法包括步骤S110-步骤S140，其中：
步骤S110、在驱动背板一面形成第一电极层，所述第一电极层包括阵列分布的多个第一电极；所述第一电极包括平坦的中间部和围绕所述中间部的边缘部；所述边缘部包括围绕所述中间部的平坦部以及连接于所述中间部和所述平坦部之间的爬坡部，所述平坦部的厚度小于所述中间部；
步骤S120、在所述驱动背板设有所述第一电极层的一面形成漏电截断层，所述漏电截断层包括向背离所述驱动背板的方向依次层叠的第一限定层和第二限定层，所述第一限定层设有一一对应露出各所述第一电极的第一开口，所述第二限定层对应于所述第一开口的位置设有围绕于所述第一开口外的第二开口，所述第二限定层在所述驱动背板的正投 影与所述中间部间隔分布；所述第一限定层设有一一对应的围绕各所述第一开口的多个盲孔结构的环形孔，所述第二限定层设于所述第一限定层背离所述驱动背板的表面，且位于所述环形孔以外；
步骤S130、形成至少覆盖所述漏电截断层和所述中间部的发光功能层；
步骤S140、形成覆盖所述发光功能层的第二电极。
在本公开的一些实施方式中，在所述驱动背板设有所述第一电极层的一面形成漏电截断层，即步骤S120，包括：
步骤S1210、在所述驱动背板设有所述第一电极层的一面形成第一限定层，所述第一限定层设有一一对应露出各第一电极的第一开口以及一一对应的围绕各所述第一开口的多个盲孔结构的环形孔；
步骤S1220、在所述第一限定层背离所述驱动背板的表面形成第二限定层，所述第二限定层对应于所述第一开口的位置设有围绕于所述第一开口外的第二开口，所述第二限定层在所述驱动背板的正投影与所述中间部间隔设置，所述第二限定层设于所述第一限定层背离所述驱动背板的表面，且位于所述环形孔以外。
本公开实施方式的制造方法的各层结构的细节及有益效果已在上文的第二种显示面板的实施方式中进行了说明，在此不再赘述。
在本公开的一些实施方式中，第一限定层和第二限定层可通过灰阶掩膜工艺或其它构图工艺一次形成；当然，也可分别独立形成，在此不做特殊限定。
本公开实施方式还提供一种显示面板的制造方法，该显示面板可为上述的第三种显示面板，如图12所示，该制造方法包括步骤S210-步骤S250，其中：
步骤S210、在驱动背板一面形成第一电极层，所述第一电极层包括阵列分布的多个第一电极；所述第一电极包括平坦的中间部和围绕所述中间部的边缘部；所述边缘部包括围绕所述中间部的平坦部以及连接于所述中间部和所述平坦部之间的爬坡部，所述平坦部的厚度小于所述中间部；
步骤S220、在所述驱动背板设有所述第一电极层的一面形成第一 限定层，所述第一限定层具多个开口，各所述第一电极一一对应的设于各所述开口内；每个所述边缘部与其所处的开口的侧壁之间形成露出所述驱动背板的间隔区；
步骤S230、形成覆盖所述第一限定层和位于所述间隔区的驱动背板的第二限定层，所述第二限定层至少部分露出所述中间部，且在所述间隔区和对应于所述边缘部的区域向所述驱动背板凹陷；
步骤S240、形成至少部分覆盖所述第二限定层和所述中间部的发光功能层；
步骤S250、形成覆盖所述发光功能层的第二电极。
本公开实施方式的制造方法的各层结构的细节及有益效果已在上文的第三种显示面板的实施方式中进行了说明，在此不再赘述。
需要说明的是，尽管在附图中以特定顺序描述了本公开中方法的各个步骤，但是，这并非要求或者暗示必须按照该特定顺序来执行这些步骤，或是必须执行全部所示的步骤才能实现期望的结果。附加的或备选的，可以省略某些步骤，将多个步骤合并为一个步骤执行，以及/或者将一个步骤分解为多个步骤执行等。
本公开实施方式还提供一种显示装置，该显示装置可包括上述的第一种显示面板、第二种显示面板和第三种显示面板的各实施方式中的任意一个，第一种显示面板至第三种显示面板具体结构可参考上文的实施方式，在此不再赘述。本公开的显示装置可用于手机、平板电脑、电视等电子设备。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由所附的权利要求指出。

Claims (33)

  1. 一种显示面板，其中，包括：
    驱动背板；
    第一电极层，设于所述驱动背板的一面，且包括阵列分布的多个第一电极，所述第一电极包括平坦的中间部和围绕所述中间部的边缘部；所述边缘部包括围绕所述中间部的平坦部以及连接于所述中间部和所述平坦部之间的爬坡部，所述平坦部的厚度小于所述中间部；
    发光功能层，至少部分覆盖所述中间部；
    第二电极，覆盖所述发光功能层，且包括分隔部和被所述分隔部分隔的多个平缓部，各所述平缓部在所述驱动背板上的正投影一一对应的位于各所述第一电极以内；所述分隔部包括凸出区以及连接所述凸出区和所述平缓部的第一凹陷区，所述第一凹陷区向所述平缓部靠近所述驱动背板的一侧凹陷，所述凸出区向所述平缓部背离所述驱动背板的一侧凸起，所述第一凹陷区在所述驱动背板上的正投影至少部分位于所述第一电极的中间部以外。
  2. 根据权利要求1所述的显示面板，其中，在垂直于驱动背板的截面上，所述第一凹陷区的最低点在所述驱动背板上的正投影位于所述第一电极的中间部以外。
  3. 根据权利要求2所述的显示面板，其中，所述第一凹陷区包括与所述平缓部相接的第一侧面以及与所述凸出区相接的第二侧面，所述第一侧面和所述第二侧面沿靠近所述驱动背板的方向收缩。
  4. 根据权利要求3所述的显示面板，其中，所述第一侧面相对于所述中间部的坡度小于或等于所述第二侧面相对于所述中间部的坡度。
  5. 根据权利要求4所述的显示面板，其中，所述第二电极对应于所述第一侧面的区域的最小厚度大于对应于所述第二侧面的区域的最小厚度。
  6. 根据权利要求4所述的显示面板，其中，所述第一侧面相对于所述中间部的坡度小于60°；所述第二侧面相对于所述中间部的坡度不小于60°，且不大于90°。
  7. 根据权利要求3所述的显示面板，其中，所述第一凹陷区在所述 驱动背板上的正投影的宽度不大于0.2μm。
  8. 根据权利要求2所述的显示面板，其中，所述第一凹陷区的深度小于所述第二电极最大厚度的两倍。
  9. 根据权利要求8所述的显示面板，其中，所述第二电极的最大厚度为90nm，所述第一凹陷区的深度小于120nm。
  10. 根据权利要求1所述的显示面板，其中，所述爬坡部相对于所述驱动背板的坡度不小于30°。
  11. 根据权利要求2所述的显示面板，其中，所述第一凹陷区的底部与相邻的第一电极的中间部沿垂直于所述驱动背板的方向的距离的最小值不小于所述平缓部和所述发光功能层的总厚度的70％。
  12. 根据权利要求2所述的显示面板，其中，所述凸出区具有向所述驱动背板凹陷的第二凹陷区，所述第二凹陷区的深度小于所述第一凹陷区的深度。
  13. 根据权利要求2-12任一项所述的显示面板，其中，所述显示面板还包括：
    漏电截断层，与所述第一电极层设于所述驱动背板的同一面，所述发光功能层覆盖所述漏电截断层；
    所述漏电截断层包括向背离所述驱动背板的方向依次层叠的第一限定层和第二限定层，所述第一限定层和所述第二限定层均至少部分露出所述第一电极的中间部，且所述第二限定层在所述驱动背板上的正投影的边界位于所述中间部以外；
    在垂直于驱动背板的截面上，所述第一凹陷区的最低点在所述驱动背板的正投影位于所述中间部和所述第二限定层在所述驱动背板的正投影之间；所述第二限定层位于所述凸出区在所述漏电截断层的正投影位于以内。
  14. 根据权利要求2-12任一项所述的显示面板，其中，所述显示面板还包括：
    漏电截断层，包括第一限定层和第二限定层，所述第一限定层与所述第一电极层设于所述驱动背板的同一面，且具多个开口，各所述第一电极一一对应的设于各所述开口内；每个所述第一电极的边缘部与其所 处的开口的侧壁之间形成露出所述驱动背板的间隔区；
    所述第二限定层覆盖所述第一限定层和位于所述间隔区的驱动背板，并至少部分露出所述第一电极的中间部，且所述第二限定层在所述间隔区和对应于所述边缘部的区域向所述驱动背板凹陷；所述第二限定层的厚度小于所述第一限定层的厚度；
    所述发光功能层覆盖所述第二限定层。
  15. 一种显示面板，其中，包括：
    驱动背板；
    第一电极层，设于所述驱动背板的一面，且包括阵列分布的多个第一电极；所述第一电极包括平坦的中间部和围绕所述中间部的边缘部；所述边缘部包括围绕所述中间部的平坦部以及连接于所述中间部和所述平坦部之间的爬坡部，所述平坦部的厚度小于所述中间部；
    漏电截断层，与所述第一电极层设于所述驱动背板的同一面，且包括向背离所述驱动背板的方向依次层叠的第一限定层和第二限定层，所述第一限定层设有一一对应露出各所述第一电极的中间部的第一开口，所述第二限定层对应于所述第一开口的位置设有围绕于所述第一开口外的第二开口，所述第二限定层在所述驱动背板的正投影与所述中间部间隔分布；所述第一限定层设有一一对应的围绕各所述第一开口的多个盲孔结构的环形孔，所述第二限定层设于所述第一限定层背离所述驱动背板的表面，且位于所述环形孔以外；
    发光功能层，至少部分覆盖所述漏电截断层和所述第一电极的中间部；
    第二电极，覆盖所述发光功能层。
  16. 根据权利要求15所述的显示面板，其中，所述第二开口的侧壁和其围绕的所述第一电极的中间部边缘的间距不小于相邻两所述第一电极的中间部的最大间距的1/5。
  17. 根据权利要求15所述的显示面板，其中，所述第二开口的侧壁和其围绕的第一电极的中间部的边缘的间距不小于0.2μm。
  18. 根据权利要求15所述的显示面板，其中，在垂直于所述驱动背板的方向上，所述第二限定层背离所述驱动背板的表面与所述中间部背 离所述驱动背板的表面的距离，不小于所述发光功能层的厚度的25％，且不大于所述发光功能层的厚度的80％。
  19. 根据权利要求15所述的显示面板，其中，所述第二开口的侧壁向背离所述驱动背板的方向扩张，且所述第二开口的侧壁与所述中间部的夹角不小于65°，且不大于90°。
  20. 根据权利要求15所述的显示面板，其中，所述第二限定层位于所述第二开口以外的区域设有凹槽。
  21. 根据权利要求20所述的显示面板，其中，所述凹槽的宽度小于相邻两所述第一电极的中间部的间距。
  22. 根据权利要求21所述的显示面板，其中，所述凹槽的宽度大于0.2μm。
  23. 一种显示面板，其中，包括：
    驱动背板；
    第一电极层，设于所述驱动背板的一面，且包括阵列分布的多个第一电极，所述第一电极包括平坦的中间部和围绕所述中间部的边缘部；所述边缘部包括围绕所述中间部的平坦部以及连接于所述中间部和所述平坦部之间的爬坡部，所述平坦部的厚度小于所述中间部；
    漏电截断层，包括第一限定层和第二限定层，所述第一限定层与所述第一电极层设于所述驱动背板的同一面，且具多个开口，各所述第一电极一一对应的设于各所述开口内；每个所述第一电极的边缘部与其所处的开口的侧壁之间形成露出所述驱动背板的间隔区；所述第二限定层覆盖所述第一限定层和位于所述间隔区的驱动背板，并至少部分露出所述第一电极的中间部，且所述第二限定层在所述间隔区和对应于所述边缘部的区域向所述驱动背板凹陷；
    发光功能层，至少部分覆盖所述第二限定层和所述第一电极的中间部；
    第二电极，覆盖所述发光功能层。
  24. 根据权利要求23所述的显示面板，其中，所述第二限定层的厚度小于所述第一限定层的厚度。
  25. 根据权利要求23所述的显示面板，其中，所述驱动背板在所述 间隔区内设有围绕所述第一电极的环形槽，所述第二限定层位于所述间隔区的部分凹陷至所述环形槽内。
  26. 根据权利要求23所述的显示面板，其中，所述驱动背板包括：
    基底；
    驱动晶体管，设于所述基底一侧；
    平坦层，设于所述驱动晶体管背离所述基底的一侧；所述第一电极层和所述漏电截断层设于所述平坦层背离所述基底的表面，所述平坦层的材料、所述第一限定层和所述第二限定层的材料相同。
  27. 根据权利要求25所述的显示面板，其中，所述环形槽与所述间隔区在所述驱动背板上的正投影重合。
  28. 根据权利要求25所述的显示面板，其中，所述第二电极对应于所述开口侧壁的区域相对于所述中间部的坡度不小于65°，且不大于90°；所述第二电极对应于所述边缘部的区域相对于所述中间部的坡度小于60°。
  29. 根据权利要求23所述的显示面板，其中，所述第二限定层的厚度小于所述第一限定层厚度的1/5。
  30. 一种显示面板的制造方法，其中，包括：
    在驱动背板一面形成第一电极层，所述第一电极层包括阵列分布的多个第一电极；所述第一电极包括平坦的中间部和围绕所述中间部的边缘部；所述边缘部包括围绕所述中间部的平坦部以及连接于所述中间部和所述平坦部之间的爬坡部，所述平坦部的厚度小于所述中间部；
    在所述驱动背板设有所述第一电极层的一面形成漏电截断层，所述漏电截断层包括向背离所述驱动背板的方向依次层叠的第一限定层和第二限定层，所述第一限定层设有一一对应露出各所述第一电极的第一开口，所述第二限定层对应于所述第一开口的位置设有围绕于所述第一开口外的第二开口，所述第二限定层在所述驱动背板的正投影与所述中间部间隔分布；所述第一限定层设有一一对应的围绕各所述第一开口的多个盲孔结构的环形孔，所述第二限定层设于所述第一限定层背离所述驱动背板的表面，且位于所述环形孔以外；
    形成至少部分覆盖所述漏电截断层和所述中间部的发光功能层；
    形成覆盖所述发光功能层的第二电极。
  31. 根据权利要求30所述的制造方法，其中，所述第一限定层和所述第二限定层通过同一次构图工艺形成。
  32. 一种显示面板的制造方法，其中，包括：
    在驱动背板一面形成第一电极层，所述第一电极层包括阵列分布的多个第一电极，所述第一电极包括平坦的中间部和围绕所述中间部的边缘部；所述边缘部包括围绕所述中间部的平坦部以及连接于所述中间部和所述平坦部之间的爬坡部，所述平坦部的厚度小于所述中间部；
    在所述驱动背板设有所述第一电极层的一面形成第一限定层，所述第一限定层具多个开口，各所述第一电极一一对应的设于各所述开口内；每个所述边缘部与其所处的开口的侧壁之间形成露出所述驱动背板的间隔区；
    形成覆盖所述第一限定层和位于所述间隔区的驱动背板的第二限定层，所述第二限定层至少部分露出所述中间部，且在所述间隔区和对应于所述边缘部的区域向所述驱动背板凹陷；
    形成至少部分覆盖所述第二限定层和所述中间部的发光功能层；
    形成覆盖所述发光功能层的第二电极。
  33. 一种显示装置，其中，包括权利要求1-29任一项所述的显示面板。
PCT/CN2021/074943 2020-03-27 2021-02-02 显示装置、显示面板及其制造方法 WO2021190161A1 (zh)

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CN202410172091.0A CN118076150A (zh) 2020-03-27 2021-02-02 显示面板
BR112022019355A BR112022019355A2 (pt) 2020-03-27 2021-02-02 Dispositivo de display, painel de display e método de fabricação do mesmo
JP2021571439A JP2023518623A (ja) 2020-03-27 2021-02-02 表示装置、表示パネル及びその製造方法
EP21775976.0A EP4131454A4 (en) 2020-03-27 2021-02-02 DISPLAY DEVICE, DISPLAY PANEL AND METHOD FOR MANUFACTURING SAME
KR1020227000207A KR20220158671A (ko) 2020-03-27 2021-02-02 표시장치, 표시패널 및 이의 제조방법
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US17/511,660 US20220052136A1 (en) 2020-03-27 2021-10-27 Display device, display panel and method of manufacturing the same
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