WO2020258906A1 - 一种显示面板和显示装置 - Google Patents

一种显示面板和显示装置 Download PDF

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Publication number
WO2020258906A1
WO2020258906A1 PCT/CN2020/077007 CN2020077007W WO2020258906A1 WO 2020258906 A1 WO2020258906 A1 WO 2020258906A1 CN 2020077007 W CN2020077007 W CN 2020077007W WO 2020258906 A1 WO2020258906 A1 WO 2020258906A1
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Prior art keywords
electrode
layer
display panel
organic functional
hole
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PCT/CN2020/077007
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English (en)
French (fr)
Inventor
朱超
马伟杰
董正逵
蔡伟民
朱翩
徐品全
范文志
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Yungu Guan Technology Co Ltd
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Yungu Guan Technology Co Ltd
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • H10K50/822—Cathodes characterised by their shape
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • H10K50/824—Cathodes combined with auxiliary electrodes
    • 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

Definitions

  • the embodiments of the present application relate to display panel technology, such as a display panel and a display device.
  • the requirements for the display performance of the display panel are getting higher and higher.
  • the display panel in the related art has uneven display, so it is urgent to improve the uneven display of the display panel.
  • the present application provides a display panel and a display device to meet the requirements of display uniformity of the display panel.
  • an embodiment of the present application provides a display panel, including: a base substrate;
  • At least one auxiliary electrode and at least one first electrode arranged on one side of the base substrate, the auxiliary electrode and the first electrode are arranged in the same layer and insulated from each other; arranged on the auxiliary electrode and the first electrode
  • the pixel definition layer on the side away from the base substrate, the pixel definition layer includes at least one first opening and at least one second opening, and the corresponding first electrode is exposed at the first opening, The corresponding auxiliary electrode is exposed at the second opening; the organic functional layer; the second electrode is arranged on the side of the organic functional layer away from the base substrate; the surface of the auxiliary electrode is provided with the corresponding first A first through hole corresponding to the two openings; a metal layer is provided in the second opening and the first through hole, and the metal layer is provided in the second opening and the first through hole Between the organic functional layer and the second electrode, the metal layer is in contact with the second electrode, and the metal layer is in contact with the sidewall of the auxiliary electrode at the first through hole.
  • an embodiment of the present application also provides a display device, including the display panel described in any of the first aspect.
  • a first through hole corresponding to the second opening is provided on the surface of the auxiliary electrode, the depth of the first through hole is greater than the thickness of the organic functional layer, and the second opening is provided with a metal layer.
  • the organic functional layer When the organic functional layer is evaporated, the organic functional layer will not adhere to the side surface of the auxiliary electrode higher than the upper surface of the organic functional layer, and the metal layer can directly contact the side surface of the auxiliary electrode to realize the electrical connection between the second electrode and the auxiliary electrode. connection. Therefore, the solution provided by the embodiment of the present invention can realize the electrical connection between the second electrode and the auxiliary electrode without using the laser drilling process to perforate the organic functional layer.
  • the solution of this embodiment can ensure that the light-emitting life of the light-emitting unit is not affected, and the display panel has a higher pixel density.
  • the resistance of the second electrode improves the display uniformity.
  • FIG. 1 is a schematic structural diagram of a display panel provided by an embodiment of the present application.
  • FIG. 2 is a schematic cross-sectional view of a display panel along the section line AA' according to an embodiment of the present application
  • FIG. 3 is a schematic cross-sectional view of another display panel along the section line AA' according to an embodiment of the present application;
  • FIG. 4 is a schematic cross-sectional view of a display panel along the section line BB' according to an embodiment of the present application
  • FIG. 5 is a schematic cross-sectional view of another display panel along the section line BB' according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • the cathode of the display panel in the related art is a whole layer of film.
  • the thickness of the cathode is general. It is made thinner, making the resistance of the cathode larger.
  • the cathode signal line connection line is electrically connected to the edge of the cathode in the non-display area, and the cathode drive signal is transmitted to various positions in the display area through the edge of the cathode. Due to the large resistance of the cathode, the cathode drive signal exists during the transmission process. Larger voltage drops result in different cathode drive signals corresponding to different pixel units, thereby affecting the display uniformity of the display panel.
  • FIG. 1 is a schematic structural diagram of a display panel provided by an embodiment of the present application.
  • 2 is a schematic cross-sectional view of a display panel along the section line AA' provided by an embodiment of the present application.
  • the display panel 100 provided by the embodiment of the present application includes: a base substrate 1, at least one auxiliary electrode 2 provided on one side of the base substrate 1, for example, a plurality of auxiliary electrodes 2 and provided on the substrate
  • the at least one first electrode 3 on one side of the substrate 1 is, for example, a plurality of first electrodes 3.
  • the auxiliary electrode 2 and the first electrode 3 are arranged in the same layer and insulated from each other.
  • the display panel 100 provided by the embodiment of the present application further includes a pixel definition layer 4 disposed on the side of the auxiliary electrode 2 and the first electrode 3 away from the base substrate 1.
  • the pixel definition layer 4 includes at least one first opening 5 and at least one second opening 6.
  • the first opening 5 exposes the corresponding first electrode 3.
  • the second opening 6 exposes the corresponding auxiliary electrode 2.
  • the display panel 100 provided by the embodiment of the present application further includes an organic functional layer and a second electrode 8.
  • the organic functional layer includes a first organic functional layer 71 disposed on the surface of the pixel definition layer 4 away from the base substrate 1 and a second functional layer 72 of the first electrode 3 on the surface away from the base substrate 1.
  • the second electrode 8 is arranged on the side of the organic functional layer away from the base substrate 1, for example, the second electrode 8 is arranged on the side of the first organic functional layer 71 away from the base substrate 1.
  • the surface of the auxiliary electrode 2 is provided with a first through hole 9 corresponding to the corresponding second opening 6.
  • the organic functional layer also includes a third organic functional layer 73 disposed on the surface of the base substrate 1 in the first through hole 9.
  • the depth D1 of the first through hole 9 is greater than the thickness D2 of the third organic functional layer 73.
  • the second opening 6 and the first through hole 9 are provided with a metal layer 10.
  • the metal layer 10 is provided between the organic functional layer and the second electrode 8 in the second opening 6 and the first through hole 9, for example, the metal layer 10 is provided in the second opening 6 and the first through hole 9 Between the third organic functional layer 73 and the second electrode 8.
  • the metal layer 10 is in contact with the second electrode 8, and the metal layer 10 is in contact with the sidewall of the auxiliary electrode 2 at the first through hole 9.
  • the first opening 5 of the pixel definition layer 4 corresponds to the light-emitting area and is used to set the light-emitting unit.
  • the second opening 6 of the pixel definition layer 4 is located in the non-light-emitting area, and the second opening 6 may be located in the display area.
  • the area between the multiple light-emitting units that is, the area between the multiple first openings 5
  • the number of the second openings 6 can be set according to the number of the auxiliary electrodes 2.
  • the second openings 6 can be provided in the areas between the first openings 5 in the display area.
  • the plurality of auxiliary electrodes 2 may be electrically connected to each other.
  • the organic functional layer may include at least one of a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer.
  • the organic functional layer adopts whole-surface evaporation during evaporation.
  • the first opening 5 also includes an organic light-emitting layer (not shown in the figure). In each first opening 5, the first electrode 3, the organic light-emitting layer, and the second organic functional layer 72 are arranged in the first The metal layer 10 and the second electrode 8 in the opening 5 constitute a light emitting unit.
  • the depth D1 of the first through hole 9 is greater than the thickness D2 of the third organic functional layer 73 to ensure that after the organic functional layer is evaporated, the upper surface of the third organic functional layer 73 in the first through hole 9 is at least lower than the auxiliary
  • the height of the upper surface of the electrode 2 is such that the metal layer 10 provided in the second opening 6 is in contact with the sidewall of the auxiliary electrode 2 at the first through hole 9.
  • the depth D1 of the first through hole 9 is greater than the thickness D2 of the third organic functional layer 73, and the second opening
  • the metal layer 10 is arranged in 6, and the metal layer 10 is in contact with the second electrode 8, so that the third organic functional layer 73 will not adhere to the auxiliary electrode higher than the upper surface of the third organic functional layer 73 when the organic functional layer is evaporated. 2 of the side wall.
  • the metal layer 10 may directly contact the sidewall of the auxiliary electrode 2 to realize electrical connection between the second electrode 8 and the auxiliary electrode 2.
  • the solution provided by the embodiment of the present application can realize the electrical connection between the second electrode 8 and the auxiliary electrode 2 without using a laser drilling process to perforate the organic functional layer. Due to the low controllability of the precision of the laser drilling process, the size and position of the control are prone to deviations during drilling, which easily affects the organic functional layer of the light-emitting area and affects the light-emitting life. Therefore, the solution of this embodiment ensures that the light-emitting unit will not be affected. The longevity ensures that the display panel 100 has a higher pixel density, while reducing the resistance of the second electrode 8 and improving the display uniformity.
  • FIG 3 is a schematic cross-sectional view of another display panel along the section line AA' provided by an embodiment of the present application. 2 and 3, along the direction where the pixel definition layer 4 points to the base substrate 1 and is perpendicular to the base substrate 1, the inner diameter of the first through hole 9 gradually increases or does not change.
  • the inner diameter of the first through hole 9 gradually increases or does not change from top to bottom, which can better ensure that the third organic functional layer 73 will not cover the first through hole during the process of forming the organic functional layer.
  • the side surface of the auxiliary electrode 2 in 9 higher than the upper surface of the third organic functional layer 73 ensures that the metal layer 10 in the first through hole 9 is in good contact with the side surface of the auxiliary electrode 2.
  • the cross-sectional shape of the first through hole 9 along the direction perpendicular to the display panel 100 can be set to be a trapezoid, as shown in FIG.
  • the cross-sectional shape of the first through hole 9 in the direction perpendicular to the display panel 100 can be set to be rectangular, and since the cross-sectional shape of the first through hole 9 is trapezoidal or rectangular, the manufacturing process is relatively Simple and can effectively reduce process cost.
  • this embodiment only exemplarily shows the case where the cross-sectional shape of the first through hole 9 is rectangular and trapezoidal. In other embodiments, the cross-section of the first through hole 9 may also have other shapes.
  • the display panel 100 further includes a connecting wire 11, the connecting wire 11 is arranged on a side of the auxiliary electrode 2 adjacent to the base substrate 1, and each auxiliary electrode 2 is electrically connected to the first power signal line through the connecting wire 11.
  • the first power signal line is configured to provide a driving signal to the second electrode 8.
  • the driving signal is provided only from the edge of the second electrode 8
  • the driving signal is transmitted over a long distance on the entire surface of the second electrode 8, and the driving signal needs to pass through multiple light-emitting units during the transmission process, and the voltage drop is relatively large.
  • the transmission path of the driving signal on the surface of the second electrode 8 is shortened, the voltage drop of the driving signal on the surface of the second electrode 8 is reduced, and the display uniformity of the display panel is improved.
  • the position of the first power signal line is not shown in the figure.
  • the first power signal line may be located in the frame area of the display panel, and the exemplary first power signal line may be provided on at least one side of the frame of the display panel.
  • the first power signal line can be located on the three sides of the display panel where no driving chip is provided.
  • a connecting wire 11 is separately provided to connect to each auxiliary electrode 2, the connecting wire 11 transmits the driving signal to the auxiliary electrode 2, and then the driving signal is transmitted from the auxiliary electrode 2 to the second electrode 8. Since the connecting line 11 is only set to transmit the driving signal, it can use a smaller resistance as required, so as to minimize the voltage drop when the driving signal is transmitted to the auxiliary electrode 2 and improve the uniform distribution of the driving signal on the second electrode 8 It improves the display uniformity of the display panel 100.
  • the connecting wire 11 can be made of a material with a small resistivity, and can be made of a larger thickness and a larger line width to reduce resistance.
  • the connecting wire 11 can be made in the same layer as other layers in the display panel 100, or can be made separately, which is not limited in this embodiment.
  • the first through hole 9 penetrates the auxiliary electrode 2 and the connection line 11, so that the metal layer 10 contacts the sidewall of the auxiliary electrode 2 and the connection line 11 at the first through hole 9.
  • the first through hole 9 penetrates the auxiliary electrode 2 and the connecting line 11, so that the depth D1 of the first through hole 9 is sufficient to accommodate the third organic functional layer 73, and the metal layer 10 and the first through hole 9 are The side walls of the auxiliary electrode 2 are in good contact.
  • the second electrode 8 is electrically connected to the auxiliary electrode 2 through the metal layer 10, and the resistance of the second electrode 8 is reduced, so that when the thickness of the connecting wire 11 is greater than the thickness of the third organic functional layer 73, the metal layer 10 can be The sidewalls of the connecting wire 11 are in contact with each other, and an insulating layer 12 is provided between the connecting wire 11 and the auxiliary electrode 2.
  • the connecting wire 11 and the auxiliary electrode 2 may be electrically connected through the metal layer 10, and no additional connecting structure may be provided, which reduces the process steps and reduces the manufacturing cost.
  • FIG. 5 is a schematic cross-sectional view of another display panel along the section line BB' according to an embodiment of the present application.
  • an insulating layer 12 is provided between the connecting wire 11 and the auxiliary electrode 2.
  • At least one second through hole 13 is provided in the insulating layer 12.
  • the auxiliary electrode 2 is electrically connected to the connecting wire 11 through the second through hole 13.
  • This arrangement can ensure the reliability of the connection between the auxiliary electrode 2 and the connection line 11, and avoid the situation that the metal layer 10 and the sidewall of the connection line 11 have a small contact area and are prone to poor contact.
  • the display panel 100 further includes a second power signal line.
  • the second power signal line and the first power signal line provide power signals in different sizes.
  • the connecting line 11 and the second power signal line are arranged in the same layer and insulated from each other.
  • the display panel 100 further includes a pixel driving circuit, and the pixel driving circuit is configured to drive the light emitting unit to emit light.
  • Each pixel driving circuit may include at least two thin film transistors and at least one capacitor.
  • the second power supply signal line is configured to provide a fixed potential to the pixel driving circuit.
  • the connecting line 11 and the second power signal line are arranged in the same layer, so that the thickness of the display panel 100 is thinner, which conforms to the development trend of the display panel 100 being lighter and thinner.
  • the connecting line 11 and the second power signal line are made by the same process, reducing the process cost.
  • the height difference between the surface of the metal layer 10 away from the base substrate 1 and the surface of the first organic functional layer 71 away from the base substrate 1 is less than or equal to 3 microns.
  • the entire second electrode 8 covers the display panel. Since the second electrode 8 is relatively thin, when the height difference between the surface of the metal layer 10 away from the substrate and the surface of the first organic functional layer 71 away from the base substrate 1 is too large, the second electrode 8 is between the metal layer 10 and the first The height difference at the junction of the organic functional layer 71 is too large, which is likely to cause uneven thickness of the second electrode 8. Exemplarily, the second electrode 8 may be broken there. By setting the height difference between the surface of the metal layer 10 away from the substrate and the surface of the first organic functional layer 71 away from the base substrate 1 to be less than or equal to 3 microns, it can be ensured that the formed second electrode 8 has good flatness. , And ensure the thickness uniformity of the second electrode 8 to improve the display uniformity of the display panel.
  • the material of the metal layer 10 and the second electrode 8 are the same.
  • the second electrode 8 can be directly vapor-deposited using the same vapor-deposition material, without replacing the vapor-deposition material, saving process steps.
  • FIG. 6 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • the display device 200 provided in the embodiment of the present application includes the display panel 100 proposed in any of the foregoing embodiments.
  • the display device 200 provided in the embodiment of the present application may be a display device such as a mobile phone, a wearable device with display function, a computer, etc.
  • the display device 200 provided in an embodiment of the present application includes the display panel 100 proposed in any of the foregoing embodiments.

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  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
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Abstract

本申请实施例公开一种显示面板和显示装置，显示面板包括衬底基板；设置于衬底基板一侧的至少一个辅助电极和至少一个第一电极，辅助电极与第一电极同层设置且相互绝缘；设置于辅助电极和第一电极远离衬底基板一侧的像素定义层，像素定义层包括至少一个第一开孔和至少一个第二开孔，第一开孔处暴露出对应的第一电极，第二开孔处暴露出对应的辅助电极；有机功能层；第二电极设置于有机功能层远离衬底基板的一侧，辅助电极表面设置有与相应第二开孔对应的第一通孔，第二开孔和第一通孔内设置有金属层，金属层设置于有机功能层和第二电极之间，金属层与第二电极接触且与第一通孔处的辅助电极的侧壁接触。

Description

一种显示面板和显示装置
本申请要求在2019年6月26日提交中国专利局、申请号为201910561658.2的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及显示面板技术，例如一种显示面板和显示装置。
背景技术
随着显示装置的迅速发展，对显示面板的显示性能的要求越来越高。然而相关技术中的显示面板存在显示不均的情况，因此急需改善显示面板的显示不均情况。
发明内容
本申请提供一种显示面板和显示装置，以实现显示面板的显示均一性的要求。
第一方面，本申请实施例提供了一种显示面板，包括：衬底基板；
设置于所述衬底基板一侧的至少一个辅助电极和至少一个第一电极，所述辅助电极与所述第一电极同层设置且相互绝缘；设置于所述辅助电极和所述第一电极远离所述衬底基板一侧的像素定义层，所述像素定义层包括至少一个第一开孔和至少一个第二开孔，所述第一开孔处暴露出对应的所述第一电极，所述第二开孔处暴露出对应的辅助电极；有机功能层；第二电极，设置于所述有机功能层的远离所述衬底基板的一侧；所述辅助电极表面设置有与相应第二开孔对应的第一通孔；金属层，设置于所述第二开孔和所述第一通孔内，在所述第二开孔和所述第一通孔内所述金属层设置于所述有机功能层和所述第二电极之间，所述金属层与所述第二电极接触，且所述金属层与所述第一通孔处的所述辅助电极的侧壁接触。
第二方面，本申请实施例还提供了一种显示装置，包括第一方面任意项所述的显示面板。
本发明实施例提供的显示面板通过在辅助电极表面设置与第二开孔对应的第一通孔，第一通孔的深度大于有机功能层的厚度，第二开孔内设置金属层， 金属层与第二电极接触。使得在蒸镀有机功能层时，有机功能层不会附着在高于有机功能层上表面位置的辅助电极的侧面，金属层可以直接与辅助电极的侧面接触，实现第二电极与辅助电极的电连接。因此本发明实施例提供的方案无需采用激光打孔工艺对有机功能层进行打孔即可实现第二电极与辅助电极的电连接，由于激光打孔工艺精度可控性低，打孔时控制尺寸和位置容易存在偏差，容易影响发光区域的有机功能层,影响发光寿命，因此本实施例的方案在保证不会影响发光单元的发光寿命，保证显示面板具有较高的像素密度的同时，可以降低第二电极的电阻，提升显示均一性。
附图说明
图1是本申请一实施例提供的一种显示面板的结构示意图；
图2是本申请一实施例提供的一种显示面板沿剖面线AA’的剖面示意图；
图3是本申请一实施例提供的另一种显示面板沿剖面线AA’的剖面示意图；
图4是本申请一实施例提供的一种显示面板沿剖面线BB’的剖面示意图；
图5是本申请一实施例提供的另一种显示面板沿剖面线BB’的剖面示意图；
图6是本申请一实施例提供的一种显示装置的结构示意图。
具体实施方式
正如背景技术中提到的相关技术中的显示面板存在显示不均的情况，申请人经过研究发现：相关技术中的显示面板的阴极为一整层膜层，为提高出光率，阴极的厚度一般做的较薄，使得阴极的电阻较大。相关技术中阴极信号线连接线在非显示区中与阴极的边缘电连接，阴极驱动信号通过阴极的边缘向显示区的各个位置传输，由于阴极的电阻较大，阴极驱动信号在传输过程中存在较大的压降，导致不同像素单元对应的阴极驱动信号不同，从而影响显示面板的显示均一性。
本实施例提供了以下解决方案：
图1是本申请一实施例提供的一种显示面板的结构示意图。图2是本申请一实施例提供的一种显示面板沿剖面线AA’的剖面示意图。结合图1和图2，本申请实施例提供的显示面板100包括：衬底基板1，设置于衬底基板1一侧的至少一个辅助电极2，例如为多个辅助电极2和设置于衬底基板1一侧的至少一 个第一电极3，例如为多个第一电极3。所述辅助电极2与所述第一电极3同层设置且相互绝缘。
本申请实施例提供的显示面板100还包括设置于所述辅助电极2和所述第一电极3远离衬底基板1一侧的像素定义层4。像素定义层4包括至少一个第一开孔5和至少一个第二开孔6。第一开孔5暴露出对应的第一电极3。第二开孔6暴露出对应的辅助电极2。
本申请实施例提供的显示面板100还包括有机功能层和第二电极8。有机功能层包括设置于像素定义层4的远离衬底基板1的表面的第一有机功能层71以及第一电极3的远离衬底基板1的表面的第二功能层72。第二电极8设置于有机功能层远离衬底基板1的一侧，示例性的，第二电极8设置于第一有机功能层71远离衬底基板1的一侧。辅助电极2表面设置有与相应第二开孔6对应的第一通孔9。有机功能层还包括设置在第一通孔9内衬底基板1表面上的第三有机功能层73。第一通孔9的深度D1大于第三有机功能层73的厚度D2。第二开孔6和第一通孔9内设置有金属层10。在第二开孔6和第一通孔9内金属层10设置于有机功能层和第二电极8之间，示例性的，在第二开孔6和第一通孔9内金属层10设置于第三有机功能层73和第二电极8之间。金属层10与第二电极8接触，且金属层10与第一通孔9处的辅助电极2的侧壁接触。
在一实施例中，像素定义层4的第一开孔5对应发光区域，用于设置发光单元，像素定义层4的第二开孔6位于非发光区域，第二开孔6可以位于显示区，例如位于多个发光单元之间的区域(即多个第一开孔5之间的区域)，也可以位于非显示区。第二开孔6的个数可以根据辅助电极2的个数需要进行设置，示例性的，可以在显示区第一开孔5之间的区域均设置第二开孔6。多个辅助电极2之间可以相互电连接。有机功能层可以包括空穴注入层、空穴传输层、电子传输层和电子注入层中的至少一种。有机功能层在蒸镀时采用整面蒸镀。在第一开孔5内还包括有机发光层(图中并未示出)，每一个第一开孔5内的第一电极3、有机发光层、第二有机功能层72、设置于第一开孔5中的金属层10和第二电极8组成一个发光单元。
此外，第一通孔9的深度D1大于第三有机功能层73的厚度D2，保证蒸镀有机功能层后，位于第一通孔9内的第三有机功能层73的上表面至少低于辅助电极2的上表面的高度，使得第二开孔6内设置的金属层10与第一通孔9处的 辅助电极2的侧壁接触。
在一实施例中，通过在辅助电极2表面设置与第二开孔6对应的第一通孔9，第一通孔9的深度D1大于第三有机功能层73的厚度D2，第二开孔6内设置金属层10，金属层10与第二电极8接触，使得在蒸镀有机功能层时，第三有机功能层73不会附着在高于第三有机功能层73上表面位置的辅助电极2的侧壁。金属层10可以直接与辅助电极2的侧壁接触，实现第二电极8与辅助电极2的电连接。因此本申请实施例提供的方案无需采用激光打孔工艺对有机功能层进行打孔即可实现第二电极8与辅助电极2的电连接。由于激光打孔工艺精度可控性低，打孔时控制尺寸和位置容易存在偏差，容易影响发光区域的有机功能层，影响发光寿命，因此本实施例的方案在保证不会影响发光单元的发光寿命，保证显示面板100具有较高的像素密度的同时，可以降低第二电极8的电阻，提升显示均一性。
图3是本申请一实施例提供的另一种显示面板沿剖面线AA’的剖面示意图。参考图2和图3，沿像素定义层4指向衬底基板1且与衬底基板1垂直的方向，第一通孔9的内径逐渐增大或不变。
在一实施例中，第一通孔9的内径从上往下逐渐增大或不变能够较好的保证在形成有机功能层的制程中，第三有机功能层73不会覆盖第一通孔9内的辅助电极2的高于第三有机功能层73的上表面的侧面，保证在第一通孔9内的金属层10与辅助电极2的侧表面良好接触。如图3所示，要实现第一通孔9的内径从上往下逐渐增大，可以设置第一通孔9沿垂直于显示面板100的方向的截面形状为梯形，如图2所示，要实现第一通孔9的内径不变，可以设置第一通孔9沿垂直于显示面板100的方向的截面形状为矩形，且由于截面形状为梯形或矩形的第一通孔9制作工艺相对简单，可以有效降低工艺成本。
需要说明的是，本实施例仅示例性的示出了第一通孔9的截面形状为矩形和梯形的情况，在其他实施方式中，第一通孔9的截面还可以为其他形状。
图4是本申请一实施例提供的一种显示面板沿剖面线BB’的剖面示意图。参见图4，显示面板100还包括连接线11，连接线11设置于辅助电极2的邻近衬底基板1的一侧，每一个辅助电极2通过连接线11与第一电源信号线电连接。
其中,第一电源信号线设置为向第二电极8提供驱动信号。在仅从第二电极 8的边缘提供驱动信号的情况下，驱动信号在整个第二电极8表面传输距离较远，驱动信号在传输过程中需经过多个发光单元，其压降较大。通过向每一个辅助电极2均提供驱动信号，使得驱动信号在第二电极8的表面的传输路径缩短，降低驱动信号在第二电极8表面的压降，提升显示面板的显示均一性。
图中并未示出第一电源信号线的位置。第一电源信号线可以位于显示面板的边框区域，示例性的第一电源信号线可以设置于显示面板的边框的至少一个侧边。如第一电源信号线可以位于显示面板的未设置驱动芯片的三个侧边。上述仅是对第一电源信号线的位置的示例说明，并非对本申请的限定，实际制作时，可根据实际情况，合理设置第一电源信号线的位置。
此外，通过单独设置连接线11连接至每一个辅助电极2，连接线11将驱动信号传输至辅助电极2，然后驱动信号由辅助电极2传输至第二电极8。由于连接线11仅设置为传输驱动信号，其可以根据需要采用较小的电阻，从而可以最大限度的降低驱动信号传输到辅助电极2时的压降，提升驱动信号在第二电极8的分布均匀性，提升显示面板100的显示均一性。
需要说明的是，连接线11可以采用电阻率较小的材料，且可以采用较大的厚度和较大的线宽，以降低电阻。此外连接线11可以与显示面板100中的其他层同层制作，也可以单独制作，本实施例并不做限定。
参见图4，第一通孔9贯穿辅助电极2和连接线11，使金属层10与第一通孔9处的辅助电极2和连接线11的侧壁接触。
在一实施例中，第一通孔9贯穿辅助电极2和连接线11，使得第一通孔9的深度D1足以容纳第三有机功能层73，保证金属层10与第一通孔9处的辅助电极2的侧壁良好接触。通过金属层10将第二电极8与辅助电极2电连接，降低第二电极8电阻的同时，使得在连接线11的厚度大于第三有机功能层73的厚度的情况下，金属层10可以与连接线11的侧壁接触，连接线11和辅助电极2之间设置有绝缘层12。连接线11和辅助电极2可以通过金属层10电连接，可以不设置额外的连接结构，减少了工艺步骤，降低了制作成本。
图5是本申请一实施例提供的另一种显示面板沿剖面线BB’的剖面示意图。参见图5，连接线11与辅助电极2之间设置有绝缘层12。绝缘层12内设置有至少一个第二通孔13。所述辅助电极2通过所述第二通孔13与连接线11电连 接。
这样设置，可以保证辅助电极2与连接线11的连接可靠性，避免金属层10与连接线11的侧壁接触面积较小容易出现接触不良的情况。
显示面板100还包括第二电源信号线，第二电源信号线与第一电源信号线提供的电源信号的大小不同，连接线11与第二电源信号线同层设置且相互绝缘。
显示面板100还包括像素驱动电路，像素驱动电路设置为驱动发光单元发光。每一个像素驱动电路可以包括至少两个薄膜晶体管和至少一个电容。第二电源信号线设置为向像素驱动电路提供固定电位。连接线11与第二电源信号线同层设置，使得显示面板100的厚度更薄，符合显示面板100轻薄化的发展趋势，此外，连接线11与第二电源信号线采用同一工艺制作，降低工艺成本。
可选地，金属层10远离衬底基板1的表面与第一有机功能层71远离衬底基板1的表面的高度差小于或等于3微米。
第二电极8整层覆盖显示面板。由于第二电极8比较薄，在金属层10的远离基板的表面与第一有机功能层71远离衬底基板1的表面高度差过大的情况下，第二电极8在金属层10与第一有机功能层71交接处的高度差过大，容易造成第二电极8的厚度不均。示例性的，第二电极8可能在该处出现断裂。通过将金属层10的远离基板的表面与第一有机功能层71远离衬底基板1的表面的高度差设置为小于或等于3微米时，能够保证形成的第二电极8具有较好的平坦性，且保证第二电极8的厚度均匀性，提升显示面板的显示均一性。
可选地，金属层10与第二电极8的材料相同。
这样设置，在制作显示面板时，蒸镀完金属层10后，可以采用相同的蒸镀材料直接蒸镀第二电极8，无需更换蒸镀材料，节省工艺步骤。
图6是本申请一实施例提供的一种显示装置的结构示意图。参见图6，本申请实施例提供的显示装置200包括上述任意实施例提出的显示面板100。
本申请实施例提供的显示装置200可以为手机、具有显示功能的可穿戴设备、计算机等显示装置，本申请实施例提供的显示装置200包括上述任意实施例提出的显示面板100。

Claims (12)

  1. 一种显示面板，包括：
    衬底基板；
    设置于所述衬底基板一侧的至少一个辅助电极和至少一个第一电极，所述辅助电极与所述第一电极同层设置且相互绝缘；
    设置于所述辅助电极和所述第一电极的远离所述衬底基板一侧的像素定义层，所述像素定义层包括至少一个第一开孔和至少一个第二开孔，所述第一开孔处暴露出对应的所述第一电极，所述第二开孔处暴露出对应的所述辅助电极；
    有机功能层；
    第二电极，设置于所述有机功能层的远离所述衬底基板的一侧；
    所述辅助电极表面设置有与相应第二开孔对应的第一通孔；
    金属层，设置于所述第二开孔和所述第一通孔内，所述金属层设置于所述有机功能层和所述第二电极之间，所述金属层与所述第二电极接触，且所述金属层与所述第一通孔处的所述辅助电极的侧壁接触。
  2. 根据权利要求1所述的显示面板，其中，所述有机功能层包括设置于所述像素定义层的远离所述衬底基板的表面的第一有机功能层、设置于所述第一电极的远离所述衬底基板的表面的第二有机功能层及设置在所述第一通孔内衬底基板表面上的第三有机功能层；所述第二电极设置于所述第一有机功能层的远离所述衬底基板的一侧；所述金属层设置于所述第三有机功能层和所述第二电极之间；所述第一通孔的深度大于所述第三有机功能层的厚度。
  3. 根据权利要求2所述的显示面板，其中，所述第三有机功能层的上表面至少低于所述辅助电极的上表面的高度。
  4. 根据权利要求1所述的显示面板，其中，
    沿所述像素定义层指向所述衬底基板且与所述衬底基板垂直的方向，所述第一通孔的内径逐渐增大或不变。
  5. 根据权利要求1所述的显示面板，还包括：
    连接线，所述连接线设置于所述辅助电极的邻近所述衬底基板的一侧，每一个所述辅助电极通过所述连接线与第一电源信号线电连接。
  6. 根据权利要求5所述的显示面板，其中，
    所述第一通孔贯穿所述辅助电极和所述连接线，所述金属层与所述第一通孔处的所述辅助电极和所述连接线的侧壁接触。
  7. 根据权利要求5所述的显示面板，其中，
    所述连接线与所述辅助电极之间设置有绝缘层，所述绝缘层内设置有至少一个第二通孔，所述辅助电极通过所述第二通孔与所述连接线电连接。
  8. 根据权利要求7所述的显示面板，还包括：
    第二电源信号线，所述第二电源信号线与所述第一电源信号线提供的电源信号的大小不同；所述连接线与所述第二电源信号线同层设置且相互绝缘。
  9. 根据权利要求2所述的显示面板，其中，
    所述金属层远离所述衬底基板的表面与所述第一有机功能层远离所述衬底基板的表面的高度差小于或等于3微米。
  10. 根据权利要求1所述的显示面板，其中，
    所述金属层与所述第二电极的材料相同。
  11. 根据权利要求1所述的显示面板，其中，
    所述有机功能层包括空穴注入层、空穴传输层、电子传输层和电子注入层中的至少一种。
  12. 一种显示装置，包括权利要求1-11任一项所述的显示面板。
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CN109166900A (zh) * 2018-09-04 2019-01-08 京东方科技集团股份有限公司 显示面板及其制备方法
CN110299467A (zh) * 2019-06-26 2019-10-01 云谷（固安）科技有限公司 一种显示面板和显示装置

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CN114256317A (zh) * 2021-12-22 2022-03-29 湖北长江新型显示产业创新中心有限公司 一种显示面板及显示装置

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