WO2020258903A1 - 一种显示面板及显示装置 - Google Patents

一种显示面板及显示装置 Download PDF

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Publication number
WO2020258903A1
WO2020258903A1 PCT/CN2020/076934 CN2020076934W WO2020258903A1 WO 2020258903 A1 WO2020258903 A1 WO 2020258903A1 CN 2020076934 W CN2020076934 W CN 2020076934W WO 2020258903 A1 WO2020258903 A1 WO 2020258903A1
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Prior art keywords
electrode
display panel
base substrate
layer
power signal
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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
    • 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
    • H10K59/1315—Interconnections, e.g. wiring lines or terminals comprising structures specially adapted for lowering the resistance

Definitions

  • the embodiments of the present application relate to display panel technology, such as a display panel and a display device.
  • the display panel in the related art has uneven display, so improving the uneven display of the display panel becomes a technical problem to be solved urgently in the industry.
  • the application provides a display panel and a display device to improve the display uniformity of the display panel.
  • an embodiment of the present application provides a display panel, which includes: a base substrate; at least one first electrode provided on one side of the base substrate; and at least one first electrode provided on the same layer as the first electrode and insulated from each other A plurality of auxiliary electrodes; and a pixel defining layer disposed on a side of the first electrode and the auxiliary electrode away from the base substrate, the pixel defining layer includes at least one first opening and at least one second opening Each of the first openings exposes a corresponding first electrode, each of the second openings exposes a corresponding auxiliary electrode, and each auxiliary electrode is far away from the
  • the surface of the base substrate is provided with metal pillars, along the direction from the base substrate to the metal pillars and perpendicular to the base substrate, the size of the metal pillars parallel to the cross section of the base substrate Gradually increase or remain unchanged; at least one second electrode, the second electrode is in contact with the metal pillar.
  • an embodiment of the present application also provides a display device, including the display panel described in any of the first aspect.
  • metal pillars are arranged on the surface of the auxiliary electrode, and the direction of the metal pillars pointing to the metal pillars along the base substrate and perpendicular to the base substrate, the dimension D1 of the cross section of the metal pillars parallel to the base substrate 1 gradually increases Or unchanged, so that when the organic functional layer is evaporated, the organic functional layer will not adhere to the side surface of the metal pillar higher than the upper surface of the organic functional layer, and the second electrode can directly contact the side surface of the metal pillar to realize the second electrode Electrical connection with the auxiliary electrode. 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 ensures that the light-emitting unit life is not affected, and the display panel has a high At the same time as the pixel density, the resistance of the second electrode can be reduced, and the display uniformity can be improved.
  • 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 another display panel along the section line AA' according to an embodiment of the present application;
  • FIG. 5 is a schematic cross-sectional view of a 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 is a whole layer of film.
  • the thickness of the cathode is generally made thinner, which makes the resistance of the cathode larger, which may cause uneven display of the display panel.
  • the connecting line of the cathode signal 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 of the display area through the edge of the cathode. Because the resistance of the cathode is large, the cathode drive signal is in the transmission process. There is a large voltage drop, which leads to different cathode driving 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 first electrode 2 provided on one side of the base substrate 1, for example, a plurality of first electrodes 2 and The at least one auxiliary electrode 3 of the first electrode 2 arranged in the same layer and insulated from each other is, for example, a plurality of auxiliary electrodes 3.
  • the display panel 100 further includes a pixel definition layer 4 disposed on one side of the substrate 1.
  • the pixel definition layer 4 includes at least one first opening 5, such as a plurality of first openings 5 and at least one second opening 6, for example For a plurality of second openings 6.
  • Each first opening 5 exposes a corresponding first electrode 2, and each second opening 6 exposes a corresponding auxiliary electrode 3.
  • a metal pillar 7 is provided on the surface of the auxiliary electrode 3 away from the base substrate 1, along the direction from the base substrate 1 to the metal pillar 7 and perpendicular to the base substrate 1.
  • the metal pillar 7 is parallel to the base substrate 1.
  • the dimension D1 of the section 1 gradually increases or does not change.
  • the display panel 100 further includes an organic functional layer 8 and a second electrode 9.
  • the organic functional layer 8 is arranged on the side of the first electrode 2, the pixel defining layer 4 and the auxiliary electrode 3 away from the base substrate 1, and the second electrode 9 is arranged on the side of the organic functional layer 8 away from the first electrode 2.
  • the second electrode 9 is in contact with the metal pillar 7, for example, the second electrode 9 is in contact with the side surface of the metal pillar 7.
  • the first opening 5 of the pixel definition layer 4 corresponds to the light-emitting area, and is used for setting 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, for example, the area between the multiple light emitting units, or it may be located in the non-display area.
  • the number of the second openings 6 can be set according to the number of the auxiliary electrodes 3.
  • the second openings 6 can be provided in the area between every two adjacent first openings 5 in the display area.
  • the plurality of auxiliary electrodes 3 may be electrically connected to each other.
  • the organic functional layer 8 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 8 is vapor-deposited on the entire surface during vapor deposition.
  • An organic light emitting layer (not shown in the figure) is also included in the first opening 5.
  • the first electrode 2, the organic light emitting layer, the organic functional layer 8 and the second electrode 9 in each first opening 5 constitute a light emitting unit.
  • the first electrode 2 may be an anode
  • the second electrode 9 may be a cathode.
  • the dimension D1 of the cross section of the metal column 7 parallel to the base substrate 1 refers to the length of the cross section in any direction.
  • the shape of the cross section of the metal column 7 is In the case of a circular shape, the dimension D1 of the cross section of the metal column 7 parallel to the base substrate 1 refers to the diameter of the cross section; in the direction parallel to the base substrate 1, in the case where the shape of the cross section of the metal column 7 is rectangular Below, the dimension D1 of the cross section of the metal pillar 7 parallel to the base substrate 1 refers to the side length of the cross section rectangle.
  • the resistance of the second electrode 9 can be reduced, the voltage drop of the driving signal on the second electrode 9 can be reduced, and the display uniformity can be improved.
  • the dimension D1 of the cross section of the metal pillar 7 parallel to the base substrate 1 gradually becomes along the direction from the base substrate 1 to the metal pillar 7 and perpendicular to the base substrate 1. Increased or unchanged, so that when the organic functional layer 8 is vapor-deposited, the organic functional layer 8 will not adhere to the side surface of the metal pillar 7 higher than the upper surface of the organic functional layer 8.
  • the second electrode 9 may directly contact the side surface of the metal pillar 7 to realize electrical connection between the second electrode 9 and the auxiliary electrode 3.
  • the solution of this embodiment does not need to use a laser drilling process to perforate the organic functional layer to realize the electrical connection between the second electrode 9 and the auxiliary electrode 3. Due to the low controllability of the precision of the laser drilling process, the size and size are controlled during drilling. The position is prone to deviation, which easily affects the organic functional layer 8 in the light-emitting area, and affects the light-emitting life. Therefore, the solution of this embodiment ensures that the light-emitting life of the light-emitting unit will not be affected, and the display panel has a higher pixel density. The resistance of the second electrode 9 improves the display uniformity.
  • 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.
  • the cross section of the metal pillar 7 perpendicular to the base substrate 1 is trapezoidal or T-shaped.
  • the trapezoidal or T-shaped cross section of the metal pillar 7 can better ensure that after the metal pillar 7 is formed on the auxiliary electrode 3, in the process of forming the organic functional layer 8, the organic functional layer 8 will not cover the metal pillar 7 higher than the organic
  • the side surface of the upper surface of the functional layer 8 ensures that the second electrode 9 is in good contact with the side surface of the metal pillar 7.
  • the manufacturing process of the trapezoidal and T-shaped metal pillars 7 is relatively simple, the process cost can be effectively reduced.
  • the metal pillar 7 is T-shaped and trapezoidal, and is not a limitation of the application. In other embodiments, the metal pillar 7 may also have other shapes.
  • 4 is a schematic cross-sectional view of another display panel along the cross-sectional line AA′ according to an embodiment of the present application. For example, referring to FIG. 4, the cross-section of the metal pillar 7 perpendicular to the base substrate 1 may also be T-shaped Combination shape with trapezoid.
  • the distance D2 between the surface of the metal pillar 7 away from the pixel defining layer 4 and the surface of the pixel defining layer 4 away from the base substrate is greater than or equal to the surface of the second electrode 9 away from the pixel defining layer 4 and the pixel defining layer 4
  • the distance D3 between the surfaces away from the base substrate is greater than or equal to the surface of the second electrode 9 away from the pixel defining layer 4 and the pixel defining layer 4
  • This arrangement ensures that the second electrode 9 can fully contact the side surface of the metal pillar 7 along its thickness direction, increases the reliability of the connection between the second electrode 9 and the metal pillar 7, reduces the contact resistance, reduces the resistance of the second electrode 9, and improves The display uniformity of the display panel.
  • the display panel 100 further includes a first power signal line, and each auxiliary electrode 3 is electrically connected to the first power signal line.
  • the first power signal line is set to provide a driving signal for the second electrode 9.
  • the driving signal is only provided from the edge of the second electrode 9, the driving signal is transmitted over the entire surface of the second electrode 9 and the driving signal is being transmitted.
  • multiple light-emitting units are required, and the voltage drop is relatively large.
  • 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 located in the display panel. At least one side of the frame of the panel, such as the first power signal line, can be located on three sides of the display panel where no driving chip is provided.
  • FIG. 5 is a schematic cross-sectional view of a display panel along the section line BB' according to an embodiment of the present application.
  • the display panel 100 further includes a connecting wire 10 disposed on a side of the auxiliary electrode 3 adjacent to the base substrate 1, and each auxiliary electrode 3 is electrically connected to the first power signal line through the connecting wire 10.
  • a connecting wire 10 is separately provided to connect to each auxiliary electrode 3, and the connecting wire 10 transmits a driving signal to each auxiliary electrode 3, and then the driving signal is transmitted from the auxiliary electrode 3 to the second electrode 9. Since the connecting line 10 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 3, and improve the uniform distribution of the driving signal on the second electrode 9 Improve the display uniformity of the display panel.
  • the connecting wire 10 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 10 can be made in the same layer as other layers in the display panel, or can be made separately, which is not limited in this embodiment.
  • the display panel 100 further includes a second power signal line.
  • the power signal provided by the second power signal line and the first power signal line have different magnitudes.
  • the connecting line 10 and the second power signal line are arranged in the same layer and insulated from each other.
  • the display panel further includes a pixel driving circuit, 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, and the second power signal line is configured to feed the pixel driving circuit.
  • a pixel driving circuit 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 signal line is configured to feed the pixel driving circuit.
  • the connecting line 10 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 thinner and lighter display panels.
  • the connecting line 10 and the second power signal line are manufactured in the same process, which reduces the process cost.
  • the material of the metal pillar 7 is Ti/Al/Ti, that is, the metal pillar 7 is formed by stacking a three-layer material of Ti/Al/Ti. Due to the small resistivity of Ti and Al, the metal pillar 7 is guaranteed to have a small resistance, the auxiliary electrode 3 and the metal pillar 7 are connected with the second electrode 9 to have a lower resistance, and the potential of the second electrode 9 is increased. The consistency of the display panel 100 improves the display uniformity of the display panel 100.
  • the connecting wire 10 can also be formed of Ti/Al/Ti material to reduce the resistance of the connecting wire 10 and improve the display uniformity of the display panel.
  • the auxiliary electrode 3 and the first electrode 2 use the same material.
  • the auxiliary electrode 3 and the first electrode 2 can be formed by the same process, which saves manufacturing costs.
  • 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 this embodiment includes the display panel 100 provided in any of the foregoing embodiments.
  • the display device 200 provided in this embodiment may be a display device such as a mobile phone, a wearable device with display function, or a computer.
  • the display device 200 provided in this embodiment includes the display panel 100 proposed in any of the foregoing embodiments.

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Abstract

本申请实施例公开了一种显示面板及显示装置，显示面板包括衬底基板，设置于衬底基板一侧的至少一个第一电极；与第一电极同层设置且相互绝缘的多个辅助电极；以及设置于第一电极和辅助电极的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，每个第一开孔处暴露出一个对应的第一电极，每个第二开孔处暴露出一个对应的辅助电极，辅助电极的远离衬底基板的表面设置有金属柱，沿着自衬底基板指向金属柱且垂直于衬底基板的方向，金属柱的平行于衬底基板的截面的尺寸逐渐增大或不变；至少一个第二电极，第二电极与金属柱接触。

Description

一种显示面板及显示装置
本申请要求在2019年6月26日提交中国专利局、申请号为201910562765.7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，例如一种显示面板及显示装置。
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，因此改善显示面板的显示不均的情况成为业界亟待解决的技术问题。
发明内容
本申请提供一种显示面板及显示装置，以提升显示面板的显示均一性。
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第一电极；与所述第一电极同层设置且相互绝缘的多个辅助电极；以及设置于所述第一电极和所述辅助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，每个所述第一开孔处暴露出一个对应的所述第一电极，每个所述第二开孔处暴露出一个对应的所述辅助电极，每个所述辅助电极的远离所述衬底基板的表面设置有金属柱，沿着自所述衬底基板指向所述金属柱且垂直于所述衬底基板的方向，所述金属柱的平行于所述衬底基板的截面的尺寸逐渐增大或不变；至少一个第二电极，所述第二电极与所述金属柱接触。
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金属柱，且沿衬底基板指向金属柱且垂直衬底基板的方向，金属柱的平行于衬底基板1的截面的尺寸D1逐渐增大或不变，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金属柱的侧面，第二电极可以直接与金属柱的侧面接触，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发光的寿命，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又一种显示面板沿剖面线AA’的剖面示意图；
图5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
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，如此有可能造成显示面板出现显示不均的情况。相关技术中阴极信号线的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。
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1一侧的至少一个第一电极2，例如为多个第一电极2以及与所述第一电极2同层设置且相互绝缘的至少一个辅助电极3，例如为多个辅助电极3。
显示面板100还包括设置于所述基板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，例如多个第一开孔5和至少一个第二开孔6，例如为多个第二开孔6。每个第一开孔5处暴露出一个对应的第一电极2，每个第二开孔6处暴露出一个对应的辅助电极3。所述辅助电极3远离衬底基板1的表面设置有一个金属柱7，沿着自衬底基板1指向金属柱7且垂直衬底基板1的方向， 所述金属柱7的平行于衬底基板1的截面的尺寸D1逐渐增大或不变。
显示面板100还包括有机功能层8和第二电极9。有机功能层8设置于第一电极2、像素定义层4和辅助电极3远离衬底基板1的一侧，第二电极9设置于有机功能层8远离第一电极2的一侧。第二电极9与金属柱7接触，示例性的，第二电极9与金属柱7的侧表面接触。
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，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3的个数需要进行设置，示例性的，可以在显示区每相邻两个第一开孔5之间的区域均设置第二开孔6。多个辅助电极3之间可以相互电连接。有机功能层8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8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2、有机发光层、有机功能层8和第二电极9组成一个发光单元。第一电极2可以为阳极，第二电极9可以为阴极。
此外，金属柱7的平行于衬底基板1的截面的尺寸D1是指该截面沿任意方向的长度，示例性地，沿平行于衬底基板1的方向，在金属柱7的截面的形状为圆形的情况下，金属柱7的平行于衬底基板1的截面的尺寸D1指的是截面的直径；沿平行于衬底基板1的方向，在金属柱7的截面的形状为矩形的情况下，金属柱7的平行于衬底基板1的截面的尺寸D1指的是截面矩形的边长。
通过设置辅助电极3可以减小第二电极9的电阻，降低驱动信号在第二电极9上的压降，提升显示均一性。此外通过在辅助电极3表面设置金属柱7，由于沿着从衬底基板1指向金属柱7且垂直于衬底基板1的方向，金属柱7的平行于衬底基板1的截面的尺寸D1逐渐增大或不变，使得在蒸镀有机功能层8时，有机功能层8不会附着在高于有机功能层8上表面位置的金属柱7的侧面。第二电极9可以直接与金属柱7的侧面接触，实现第二电极9与辅助电极3的电连接。本实施例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9与辅助电极3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8，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发光的寿命，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9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，金属柱7的垂直于衬底基板1的截面为梯形或T字型。
金属柱7采用梯形或者T字型截面能够较好的保证在辅助电极3上形成金属柱7之后，在形成有机功能层8的制程中，有机功能层8不会覆盖金属柱7的高于有机功能层8的上表面的侧面，保证第二电极9与金属柱7的侧表面良好接触。且由于梯形和T字型金属柱7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金属柱7为T字型和梯形的情况，并非对本申请的限定，在其他实施方式中，金属柱7还可以为其他形状。图4是本申请一实施例提供的又一种显示面板沿剖面线AA’的剖面示意图，示例性的，参考图4，金属柱7垂直于衬底基板1的截面为还可以为T字型和梯形的组合形状。
参见图2，金属柱7的远离像素定义层4的表面与像素定义层4的远离衬底基板的表面之间的距离D2大于或等于第二电极9远离像素定义层4的表面与像素定义层4远离衬底基板的表面之间的距离D3。
这样设置，保证第二电极9沿其厚度方向能与金属柱7的侧表面充分接触，增加第二电极9与金属柱7的连接可靠性，降低接触电阻，降低第二电极9的电阻，提升显示面板的显示均一性。
显示面板100还包括第一电源信号线，每一个辅助电极3均与第一电源信号线电连接。
第一电源信号线设置为为第二电极9提供驱动信号，在仅从第二电极9的边缘提供驱动信号的情况下，驱动信号在整个第二电极9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3提供驱动信号，使得驱动信号在第二电极9的表面的传输路径缩短，降低驱动信号在第二电极9表面的压降，提升显示面板的显示均一性。
需要说明的是，图中并未示出第一电源信号线的位置，并非对本申请的限定，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。
在一实施例中，图5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5，显示面板100还包括连接线10，连接线10设置于辅 助电极3邻近衬底基板1的一侧，每一个辅助电极3通过连接线10与第一电源信号线电连接。
单独设置连接线10连接至每一个辅助电极3，连接线10将驱动信号传输至每一个所述辅助电极3，然后驱动信号从辅助电极3传输至第二电极9。由于连接线10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3时的压降，提升驱动信号在第二电极9的分布均匀性，提升显示面板的显示均一性。
需要说明的是，连接线10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10可以与显示面板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。
可选地，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10与第二电源信号线同层设置且相互绝缘。
可选地，显示面板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10与第二电源信号线同层设置，使得显示面板100的厚度更薄，符合显示面板轻薄化的发展趋势。此外，连接线10与第二电源信号线在同一工艺制作，降低工艺成本。
可选地，金属柱7的材料为Ti/Al/Ti，即金属柱7采用Ti/Al/Ti三层材料堆叠形成。由于Ti和Al的电阻率较小，保证金属柱7具有较小的电阻，保证辅助电极3和金属柱7与第二电极9联接后的电阻更小，提高第二电极9的各处的电位的一致性，提高显示面板100的显示均一性。
另外，连接线10也可以采用Ti/Al/Ti材料形成，降低连接线10的电阻，提升显示面板的显示均一性。
可选地，辅助电极3与第一电极2采用的材料相同。
这样设置，辅助电极3与第一电极2可以采用同一工艺形成，节省制作成本。
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，本实施例提供的显示装置200包括上述任意实施例提供的显示面板100。
示例性的，本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 (14)

  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第一电极；
    与所述第一电极同层设置且相互绝缘的多个辅助电极；以及
    设置于所述第一电极和所述辅助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，每个所述第一开孔处暴露出一个对应的所述第一电极，每个所述第二开孔处暴露出一个对应的所述辅助电极，所述辅助电极的远离所述衬底基板的表面设置有金属柱，沿着自所述衬底基板指向所述金属柱且垂直于所述衬底基板的方向，所述金属柱的平行于所述衬底基板的截面的尺寸逐渐增大或不变；
    至少一个第二电极，所述第二电极与所述金属柱接触。
  2. 根据权利要求1所述的显示面板，其中，所述显示面板还包括有机功能层，所述有机功能层设置于所述像素定义层、所述第一电极和所述辅助电极的远离所述衬底基板的一侧，所述第二电极设置于所述有机功能层远离所述第一电极的一侧，所述第二电极与所述金属柱的侧表面接触。
  3. 根据权利要求1所述的显示面板，其中，
    所述金属柱的垂直于所述衬底基板的截面为梯形或T字型。
  4. 根据权利要求1所述的显示面板，其中，
    所述金属柱的远离所述像素定义层的表面与所述像素定义层的远离衬底基板的表面之间的距离大于或等于所述第二电极的远离所述像素定义层的表面与所述像素定义层的远离衬底基板的表面之间的距离。
  5. 根据权利要求1所述的显示面板，还包括：
    第一电源信号线，每一个所述辅助电极与所述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，所述第一电源信号线设置为为所述第二电极提供驱动信号。
  7. 根据权利要求5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所述第一电源信号线电连接。
  8. 根据权利要求7所述的显示面板，其中，所述连接线设置为传输驱动信号，驱动信号由所述连接线传输至每一个所述辅助电极，再由所述辅助电极传输至所述第二电极。
  9. 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。
  10. 根据权利要求1所述的显示面板，还包括像素驱动电路，所述像素驱动电路设置为驱动发光单元发光，每一个所述像素驱动电路包括至少两个薄膜晶体管和至少一个电容。
  11. 根据权利要求1所述的显示面板，其中，
    所述金属柱的材料为Ti/Al/Ti，和/或所述连接线的材料为Ti/Al/Ti。
  12. 根据权利要求1所述的显示面板，其中，
    所述辅助电极与所述第一电极的材料相同，和/或所述辅助电极与所述第一电极采用同一工艺形成。
  13. 根据权利要求2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。
  14. 一种显示装置，包括权利要求1-13任一项所述的显示面板。
PCT/CN2020/076934 2019-06-26 2020-02-27 一种显示面板及显示装置 Ceased WO2020258903A1 (zh)

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