WO2020220630A1 - 显示面板及显示装置 - Google Patents

显示面板及显示装置 Download PDF

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Publication number
WO2020220630A1
WO2020220630A1 PCT/CN2019/115469 CN2019115469W WO2020220630A1 WO 2020220630 A1 WO2020220630 A1 WO 2020220630A1 CN 2019115469 W CN2019115469 W CN 2019115469W WO 2020220630 A1 WO2020220630 A1 WO 2020220630A1
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WIPO (PCT)
Prior art keywords
auxiliary cathode
display panel
contact holes
cathode contact
substrate
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PCT/CN2019/115469
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English (en)
French (fr)
Inventor
肖翔
陆炜
Original Assignee
深圳市华星光电半导体显示技术有限公司
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Publication of WO2020220630A1 publication Critical patent/WO2020220630A1/zh

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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
    • H10K50/824—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 present invention relates to the field of display technology, in particular to a display panel and a display device.
  • OLED Organic Light-Emitting Diode
  • Top-emitting OLEDs can effectively solve the problems of reduced aperture ratio and reduced brightness due to complex pixel circuits. At the same time, it can also improve the color gamut of OLED display devices by using the microcavity effect in the top-emitting OLED structure. display effect.
  • auxiliary cathodes are often used to reduce the influence of IR voltage drop.
  • OLED film layers between the auxiliary cathode and the cathode such as the electron transport layer (Electron Transport Layer, ETL), need to be turned on by burn in (voltage applied between two poles to burn through the middle layer).
  • ETL Electrode Transport Layer
  • the embodiments of the present invention provide a display panel and a display device, which facilitate the conduction of auxiliary cathode contact holes, so that the IR voltage drop of the display panel is more obvious, and the display uniformity of the display panel is improved.
  • the present application provides a display panel, the display panel includes a cover plate provided with an auxiliary cathode and a plurality of auxiliary cathode contact holes, the plurality of auxiliary cathode contact holes The distribution density on the display panel gradually increases from the border to the center.
  • the cover plate further includes:
  • An auxiliary cathode provided on the first substrate
  • the conductive layer is arranged on a side of the coating layer away from the first substrate, and the conductive layer is electrically connected with the auxiliary cathode through the auxiliary cathode contact hole.
  • the cover plate is divided into an innermost first preset area, a second preset area outside the first preset area, and a third preset area outside the second preset area. Preset area
  • the distribution density of the plurality of auxiliary cathode contact holes on the first predetermined area is greater than the distribution density of the plurality of auxiliary cathode contact holes on the second predetermined area, and the plurality of auxiliary cathode contact holes
  • the distribution density on the second predetermined area is greater than the distribution density of the plurality of auxiliary cathode contact holes on the third predetermined area.
  • each pixel in the first predetermined area is correspondingly provided with an auxiliary cathode contact hole.
  • 3 auxiliary cathode contact holes are provided for every 4 pixels in the second predetermined area.
  • 2 auxiliary cathode contact holes are provided for every 4 pixels in the third predetermined area.
  • the cover plate further includes a black matrix, and the auxiliary cathode is disposed on a side of the black matrix away from the first substrate.
  • the cover plate further includes a color filter layer, and the color filter layer is disposed on a side of the black matrix away from the first substrate.
  • the display panel further includes an array substrate, and the cover plate is disposed on the array substrate and is attached to the array substrate.
  • the present application provides a display device, the display device includes a display panel, the display panel includes a cover plate, the cover plate is provided with an auxiliary cathode and a plurality of auxiliary cathode contact holes, the plurality of auxiliary The distribution density of the cathode contact holes on the display panel gradually increases from the boundary to the center.
  • the cover plate further includes:
  • An auxiliary cathode provided on the first substrate
  • the conductive layer is arranged on a side of the coating layer away from the first substrate, and the conductive layer is electrically connected with the auxiliary cathode through the auxiliary cathode contact hole.
  • the cover plate is divided into an innermost first preset area, a second preset area outside the first preset area, and a third preset area outside the second preset area. Preset area
  • the distribution density of the plurality of auxiliary cathode contact holes on the first predetermined area is greater than the distribution density of the plurality of auxiliary cathode contact holes on the second predetermined area, and the plurality of auxiliary cathode contact holes
  • the distribution density on the second predetermined area is greater than the distribution density of the plurality of auxiliary cathode contact holes on the third predetermined area.
  • each pixel in the first predetermined area is correspondingly provided with an auxiliary cathode contact hole.
  • 3 auxiliary cathode contact holes are provided for every 4 pixels in the second predetermined area.
  • 2 auxiliary cathode contact holes are provided for every 4 pixels in the third predetermined area.
  • the cover plate further includes a black matrix, and the auxiliary cathode is disposed on a side of the black matrix away from the first substrate.
  • the cover plate further includes a color filter layer, and the color filter layer is disposed on a side of the black matrix away from the first substrate.
  • the display panel further includes an array substrate, and the cover plate is disposed on the array substrate and is attached to the array substrate.
  • the material of the auxiliary cathode may be Ag, Pt, Al, Mo or Cu, and the thickness of the auxiliary cathode is 300-600 nm.
  • the display panel of the embodiment of the present invention includes a cover plate provided with an auxiliary cathode and a plurality of auxiliary cathode contact holes, and the distribution density of the plurality of auxiliary cathode contact holes on the display panel increases from the border to the center. .
  • auxiliary cathode design method provided in the embodiment of the present invention, auxiliary cathode contact holes with different densities are designed at different positions of the display panel, that is, the distribution density of the multiple auxiliary cathode contact holes on the display panel increases sequentially from the boundary to the center, which is beneficial to the auxiliary
  • the conduction of the cathode contact hole makes the IR voltage drop of the display panel more obvious, and improves the display uniformity of the display panel.
  • Figure 1 is a schematic diagram of the auxiliary cathode of the display panel in the traditional design
  • FIG. 2 is a schematic structural diagram of an embodiment of the auxiliary cathode of the display panel in the embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of an embodiment of a top-emitting OLED display panel in an embodiment of the present invention.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the present invention, “plurality” means two or more than two, unless specifically defined otherwise.
  • each pixel corresponds to an auxiliary cathode contact hole (100%). Due to the IR drop (IR Drop), the burn in (voltage applied between the two electrodes makes the intermediate layer burn in).
  • IR Drop the burn in
  • different auxiliary cathode contact holes correspond to different voltages. Some auxiliary cathode contact holes are turned on first, and then most of the current flows through the conductive auxiliary cathode contact holes, making other auxiliary cathode contact holes unable to conduct and fail, resulting in IR pressure The improvement is not obvious, and the display panel is not uniform.
  • embodiments of the present invention provide a display panel and a display device. Detailed descriptions are given below.
  • an embodiment of the present invention provides a display panel, the display panel includes a cover plate, the cover plate is provided with an auxiliary cathode and a plurality of auxiliary cathode contact holes, the plurality of auxiliary cathode contact holes in the display panel The density of the distribution increases from the boundary to the center.
  • FIG. 2 it is a schematic structural diagram of an embodiment of the auxiliary cathode of the display panel in the embodiment of the present invention.
  • the display panel includes a cover plate provided with an auxiliary cathode 201 and a plurality of auxiliary cathode contact holes 202.
  • the distribution density of the plurality of auxiliary cathode contact holes 202 on the display panel gradually increases from the boundary to the center.
  • auxiliary cathode contact holes with different densities are designed at different positions of the display panel, that is, the distribution density of the multiple auxiliary cathode contact holes on the display panel increases sequentially from the boundary to the center, which is beneficial to the auxiliary
  • the conduction of the cathode contact hole makes the IR voltage drop of the display panel more obvious, and improves the display uniformity of the display panel.
  • the display panel in the embodiment of the present invention is a top-emitting OLED display panel.
  • the top-emitting OLED display panel includes an array substrate 10 and a cover plate 20;
  • the array substrate 10 includes a thin film transistor (Thin Film Transistor, TFT) (not identified in FIG. 3), a pixel defining layer 11
  • OLED 12 includes an anode 121, an organic material functional layer 122, a cathode 123, etc.;
  • the cover plate 20 includes an auxiliary cathode 21, a spacer 22, and a conductive layer 23.
  • the conductive layer 23 is used to connect the cathode 123 with The auxiliary cathode 21 is electrically connected.
  • the display panel in the embodiment of the present invention may include the basic structure in the top-emitting OLED display panel.
  • the display panel in the embodiment of the present invention may also include an array substrate, and the cover plate is disposed on the array substrate. On the substrate, it is attached to the array substrate.
  • each sub-pixel area of the array substrate may further include a TFT, and a driving circuit constructed by the TFT is used to drive the display panel to emit light.
  • the TFT may be a TFT using oxides, silicon materials, and organic materials as an organic layer, and its structure may be a bottom gate type or a top gate type.
  • the auxiliary cathode by providing a coating layer on the side of the auxiliary cathode away from the first substrate to cover the auxiliary cathode, the problem of light reflection of the auxiliary cathode can be effectively solved. Therefore, the performance of the array substrate can be effectively avoided. Impact. Wherein, although a plurality of auxiliary cathode contact holes exposing the auxiliary cathode are formed on the cladding layer, since the auxiliary cathode contact holes are small in size, they will not affect the stability of the TFT on the array substrate due to light reflection. In addition, the auxiliary cathode is covered by the coating layer, which can also prevent the high-temperature process from oxidizing the auxiliary cathode of the metal material, thereby avoiding IR voltage drop at the low voltage end.
  • the cover plate in the embodiment of the present invention may further include: a first substrate; an auxiliary cathode provided on the first substrate; a package provided on the side of the auxiliary cathode away from the first substrate A coating layer, the coating layer coating the auxiliary cathode, the plurality of auxiliary cathode contact holes are arranged on the coating layer; the coating layer is arranged on the side of the coating layer away from the first substrate to conduct electricity The conductive layer is electrically connected to the auxiliary cathode through the auxiliary cathode contact hole.
  • the top-emitting OLED display panel described in the embodiment of the present invention only describes and illustrates a part of the structure (only part of the structure of the top-emitting OLED display panel is identified in FIG. 2 and FIG. 3). It is understandable that, except In addition to the above structure, the top-emitting OLED display panel described in the embodiment of the present invention may also include any other necessary structures as required, which is not specifically limited here.
  • the cover in the display panel The board may further include a black matrix, and the auxiliary cathode is disposed on a side of the black matrix away from the first substrate.
  • the cover plate in the display panel may further include a color filter layer, and the color filter layer is disposed on a side of the black matrix away from the first substrate.
  • the cover is divided into an innermost first preset area 203, a second preset area 204 outside the first preset area, and an outside second preset area.
  • the distribution density of the plurality of auxiliary cathode contact holes 202 in the first preset area 203 is greater than that of the plurality of auxiliary cathode contact holes 202 in the second preset area 204
  • the distribution density of the plurality of auxiliary cathode contact holes 202 on the second predetermined area 204 is greater than the distribution density of the plurality of auxiliary cathode contact holes 202 on the third predetermined area 205.
  • each pixel in the first preset area 203 is correspondingly provided with an auxiliary cathode contact hole.
  • Three auxiliary cathode contact holes are provided for every four pixels in the second preset area 204.
  • Two auxiliary cathode contact holes are provided for every four pixels in the third preset area 205.
  • the distribution density of the auxiliary cathode contact holes in a target area of the display panel may be the ratio of the number of auxiliary cathode contact holes to the number of pixels in the target area.
  • each pixel in the first preset area 203 is provided with an auxiliary cathode contact hole corresponding to the distribution density of the auxiliary cathode contact hole is 100%;
  • Each pixel is provided with 3 auxiliary cathode contact holes, and the corresponding auxiliary cathode contact hole distribution density is 75%;
  • the third preset area 205 is provided with 2 auxiliary cathode contact holes for every 4 pixels, and the corresponding auxiliary cathode contact holes are distributed The density is 50%.
  • the distribution density in the first preset area 203, the second preset area 204, and the third preset area 205 are only examples for illustration.
  • the distribution density in the first preset area 203, the second preset area 204, and the third preset area 205 may be other values, and it is only necessary to ensure that the plurality of auxiliary cathode contact holes 202 are in the first
  • the distribution density on the preset area 203 is greater than the distribution density of the plurality of auxiliary cathode contact holes 202 in the second preset area 204, and the plurality of auxiliary cathode contact holes 202 are in the second preset area 204. It suffices that the distribution density on the above is greater than the distribution density of the plurality of auxiliary cathode contact holes 202 on the third predetermined area 205, which is not specifically limited.
  • the material of the auxiliary cathode may be a metal material with good conductivity such as Ag (silver), Pt (gold), Al (aluminum), Mo (molybdenum), Cu (copper), and its thickness may be, for example, 300 ⁇ 600nm, the specific thickness can be set as required.
  • An embodiment of the present invention also provides a display panel.
  • the display panel includes a cover plate and an array substrate.
  • the cover plate is disposed on the array substrate and is attached to the array substrate.
  • the array substrate is provided with an auxiliary cathode and a plurality of auxiliary cathode contact holes, and the distribution density of the plurality of auxiliary cathode contact holes on the display panel gradually increases from the boundary to the center.
  • the array substrate may further include: a first substrate; an auxiliary cathode arranged on the first substrate; a cladding layer arranged on a side of the auxiliary cathode away from the first substrate, the A cladding layer covers the auxiliary cathode, and the plurality of auxiliary cathode contact holes are provided on the cladding layer; the conductive layer is provided on the side of the cladding layer away from the first substrate, and the conductive The layer is electrically connected to the auxiliary cathode through the auxiliary cathode contact hole.
  • the array substrate may be divided into an innermost first preset area, a second preset area outside the first preset area, and a third preset area outside the second preset area;
  • the distribution density of the plurality of auxiliary cathode contact holes in the first preset area is greater than the distribution density of the plurality of auxiliary cathode contact holes in the second preset area, and the plurality of auxiliary cathode contact holes are
  • the distribution density on the second predetermined area is greater than the distribution density of the plurality of auxiliary cathode contact holes on the third predetermined area.
  • each pixel in the first preset area may be provided with an auxiliary cathode contact hole correspondingly.
  • Three auxiliary cathode contact holes may be provided for every four pixels in the second preset area.
  • Two auxiliary cathode contact holes are provided for every four pixels in the third preset area.
  • the array substrate may further include a black matrix, and the auxiliary cathode is disposed on a side of the black matrix away from the first substrate.
  • the array substrate may further include a color filter layer, and the color filter layer is disposed on a side of the black matrix away from the first substrate.
  • an embodiment of the present invention also provides a display device, which includes the display device as described in any of the above display panel embodiments. Display panel.
  • the display performance of the display device is further improved.

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Abstract

一种显示面板及显示装置。其中，该显示面板包括盖板，所述盖板上设置有辅助阴极(201)和多个辅助阴极接触孔(202)，所述多个辅助阴极接触孔(202)在所述显示面板上的分布密度从边界到中心依次递增。这样有利于辅助阴极接触孔(202)的导通，使得显示面板IR压降更明显，改善了显示面板显示均匀性。

Description

显示面板及显示装置 技术领域
本发明涉及显示技术领域，具体涉及一种显示面板及显示装置。
 背景技术
有机电致发光二极管(Organic Light-Emitting Diode，OLED)显示装置以轻薄、低功耗、高响应、高分辨率等优点，受到广泛关注。顶发光OLED可有效解决由于复杂的像素电路所带来的开口率降低及亮度降低的问题，同时利用顶发射OLED结构中存在的微腔效应，还可以对OLED显示装置的色域进行改善，提高显示效果。
顶发光OLED显示面板中，常采用辅助阴极来减弱IR 压降的影响，在辅助阴极与阴极间常有部分OLED膜层，如电子传输层（Electron Transport Layer，ETL），需采用burn in（两极间加电压使中间层烧穿）的方式使其导通。
 技术问题
统辅助阴极设计方式，通常在部分辅助阴极接触孔导通后，其它辅助阴极接触孔无法导通，导致不导通的辅助阴极接触孔失效，IR 压降改善不明显，显示面板显示不均匀。
 技术解决方案
本发明实施例提供一种显示面板及显示装置，有利于辅助阴极接触孔的导通，使得显示面板IR压降更明显，改善了显示面板显示均匀性。
为解决上述问题，第一方面，本申请提供一种显示面板，所述显示面板包括盖板，所述盖板上设置有辅助阴极和多个辅助阴极接触孔，所述多个辅助阴极接触孔在所述显示面板上的分布密度从边界到中心依次递增。
在本申请一些实施例中，所述盖板还包括：
第一衬底；
设置于所述第一衬底上的辅助阴极；
设置于所述辅助阴极远离所述第一衬底一侧的包覆层，所述包覆层包覆所述辅助阴极，所述多个辅助阴极接触孔设置在所述包覆层上；
设置于所述包覆层远离所述第一衬底的一侧导电层，所述导电层通过所述辅助阴极接触孔与所述辅助阴极电连接。
在本申请一些实施例中，所述盖板被分为最内的第一预设区域、所述第一预设区域外侧的第二预设区域以及所述第二预设区域外侧的第三预设区域；
所述多个辅助阴极接触孔在所述第一预设区域上的分布密度大于所述多个辅助阴极接触孔在所述第二预设区域上的分布密度，所述多个辅助阴极接触孔在所述第二预设区域上的分布密度大于所述多个辅助阴极接触孔在所述第三预设区域上的分布密度。
在本申请一些实施例中，所述第一预设区域中每个像素对应设置一个辅助阴极接触孔。
在本申请一些实施例中，所述第二预设区域中每4个像素设置3个辅助阴极接触孔。
在本申请一些实施例中，所述第三预设区域中每4个像素设置2个辅助阴极接触孔。
在本申请一些实施例中，所述盖板还包括黑色矩阵，所述辅助阴极设置于所述黑色矩阵远离所述第一衬底一侧。
在本申请一些实施例中，所述盖板还包括彩色滤光层，所述彩色滤光层设置于所述黑色矩阵远离所述第一衬底的一侧。
在本申请一些实施例中，所述显示面板还包括阵列基板，所述盖板设置在所述阵列基板之上，与所述阵列基板贴合。
第二方面，本申请提供一种显示装置，所述显示装置包括显示面板，所述显示面板包括盖板，所述盖板上设置有辅助阴极和多个辅助阴极接触孔，所述多个辅助阴极接触孔在所述显示面板上的分布密度从边界到中心依次递增。
在本申请一些实施例中，所述盖板还包括：
第一衬底；
设置于所述第一衬底上的辅助阴极；
设置于所述辅助阴极远离所述第一衬底一侧的包覆层，所述包覆层包覆所述辅助阴极，所述多个辅助阴极接触孔设置在所述包覆层上；
设置于所述包覆层远离所述第一衬底的一侧导电层，所述导电层通过所述辅助阴极接触孔与所述辅助阴极电连接。
在本申请一些实施例中，所述盖板被分为最内的第一预设区域、所述第一预设区域外侧的第二预设区域以及所述第二预设区域外侧的第三预设区域；
所述多个辅助阴极接触孔在所述第一预设区域上的分布密度大于所述多个辅助阴极接触孔在所述第二预设区域上的分布密度，所述多个辅助阴极接触孔在所述第二预设区域上的分布密度大于所述多个辅助阴极接触孔在所述第三预设区域上的分布密度。
在本申请一些实施例中，所述第一预设区域中每个像素对应设置一个辅助阴极接触孔。
在本申请一些实施例中，所述第二预设区域中每4个像素设置3个辅助阴极接触孔。
在本申请一些实施例中，所述第三预设区域中每4个像素设置2个辅助阴极接触孔。
在本申请一些实施例中，所述盖板还包括黑色矩阵，所述辅助阴极设置于所述黑色矩阵远离所述第一衬底一侧。
在本申请一些实施例中，所述盖板还包括彩色滤光层，所述彩色滤光层设置于所述黑色矩阵远离所述第一衬底的一侧。
在本申请一些实施例中，所述显示面板还包括阵列基板，所述盖板设置在所述阵列基板之上，与所述阵列基板贴合。
在本申请一些实施例中，所述辅助阴极的材料可以为Ag、Pt、Al、Mo或Cu，所述辅助阴极的厚度为300~600nm。
 有益效果
本发明实施例显示面板包括盖板，所述盖板上设置有辅助阴极和多个辅助阴极接触孔，所述多个辅助阴极接触孔在所述显示面板上的分布密度从边界到中心依次递增。本发明实施例中提供的辅助阴极设计方式，在显示面板不同位置设计不同密度的辅助阴极接触孔，即多个辅助阴极接触孔在显示面板上的分布密度从边界到中心依次递增，有利于辅助阴极接触孔的导通，使得显示面板IR压降更明显，改善了显示面板显示均匀性。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，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是传统设计中显示面板辅助阴极的一个结构示意图；
图2是本发明实施例中显示面板辅助阴极的一个实施例结构示意图；
图3是本发明实施例中顶发光OLED显示面板的一个实施例结构示意图。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请中，“示例性”一词用来表示“用作例子、例证或说明”。本申请中被描述为“示例性”的任何实施例不一定被解释为比其它实施例更优选或更具优势。为了使本领域任何技术人员能够实现和使用本发明，给出了以下描述。在以下描述中，为了解释的目的而列出了细节。应当明白的是，本领域普通技术人员可以认识到，在不使用这些特定细节的情况下也可以实现本发明。在其它实例中，不会对公知的结构和过程进行详细阐述，以避免不必要的细节使本发明的描述变得晦涩。因此，本发明并非旨在限于所示的实施例，而是与符合本申请所公开的原理和特征的最广范围相一致。
如图1所示，在显示面板的传统辅助阴极设计中，每个像素对应一个辅助阴极接触孔（100%），由于IR压降（IR Drop）使得burn in（两极间加电压使中间层烧穿）过程中不同辅助阴极接触孔对应电压不同，部分辅助阴极接触孔先导通，然后大部分电流从导通的辅助阴极接触孔流过使其他辅助阴极接触孔无法导通而失效，导致IR压降改善不明显显示面板显示不均匀。
基于此，本发明实施例提供一种显示面板及显示装置。以下分别进行详细说明。
首先，本发明实施例中提供一种显示面板，该显示面板包括盖板，所述盖板上设置有辅助阴极和多个辅助阴极接触孔，所述多个辅助阴极接触孔在所述显示面板上的分布密度从边界到中心依次递增。
如图2所示，为本发明实施例中显示面板辅助阴极的一个实施例结构示意图，该显示面板包括盖板，所述盖板上设置有辅助阴极201和多个辅助阴极接触孔202，所述多个辅助阴极接触孔202在所述显示面板上的分布密度从边界到中心依次递增。
本发明实施例中提供的辅助阴极设计方式，在显示面板不同位置设计不同密度的辅助阴极接触孔，即多个辅助阴极接触孔在显示面板上的分布密度从边界到中心依次递增，有利于辅助阴极接触孔的导通，使得显示面板IR压降更明显，改善了显示面板显示均匀性。
由于在顶发光OLED显示面板中，常采用辅助阴极来减弱IR 压降的影响，因此优选的，本发明实施例中显示面板为顶发光OLED显示面板。
一般来说，如图3所示，顶发光OLED显示面板包括阵列基板10和盖板20；阵列基板10包括薄膜晶体管 (Thin Film Transistor，TFT)(图3中未标识出)、像素界定层11和顶发射型OLED 12，OLED12包括阳极121、有机材料功能层122和阴极123等；而盖板20包括辅助阴极21、隔垫物22和导电层23等，导电层23用于使阴极123与辅助阴极21电连接。
因此，本发明实施例中所述显示面板可以包括上述顶发光OLED显示面板中的基本结构，例如，本发明实施例中所述显示面板还可以包括阵列基板，所述盖板设置在所述阵列基板之上，与所述阵列基板贴合。需要说明的是，阵列基板的每个子像素区域还可包括TFT，由TFT构造的驱动电路用于驱动显示面板发光。所述TFT可以是采用氧化物、硅材料以及有机物材料作为有机层的 TFT，其结构可以是底栅型也可以是顶栅型。本发明实施例中通过在辅助阴极远离第一衬底一侧的设置包覆层，使其包覆辅助阴极，可有效解决辅助阴极反光的问题，因此，可有效避免对阵列基板上的性能造成的影响。其中，虽然包覆层上形成露出辅助阴极的多个辅助阴极接触孔，但是由于辅助阴极接触孔本身尺寸较小，因此，不会由于反光而影响阵列基板上TFT的稳定性。此外，通过包覆层包覆辅助阴极，还可防止高温工艺使金属材料的辅助阴极氧化，因而可避免造成在低电压端产生IR压降。
另外，本发明实施例中所述盖板还可以包括：第一衬底；设置于所述第一衬底上的辅助阴极；设置于所述辅助阴极远离所述第一衬底一侧的包覆层，所述包覆层包覆所述辅助阴极，所述多个辅助阴极接触孔设置在所述包覆层上；设置于所述包覆层远离所述第一衬底的一侧导电层，所述导电层通过所述辅助阴极接触孔与所述辅助阴极电连接。
需要说明的是，本发明实施例所述的顶发光OLED显示面板，仅描述和图示了部分结构（图2、图3中仅标识顶发光OLED显示面板部分结构），可以理解的是，除了上述结构之外，本发明实施例中描述的顶发光OLED显示面板，还可以根据需要包括任何其他的必要结构，具体此处不作限定，例如，本发明实施例中，显示面板中的所述盖板还可以包括黑色矩阵，所述辅助阴极设置于所述黑色矩阵远离所述第一衬底一侧。同样的，本发明实施例中，显示面板中的所述盖板还可以包括彩色滤光层，所述彩色滤光层设置于所述黑色矩阵远离所述第一衬底的一侧。
进一步的，如图2所示，所述盖板被分为最内的第一预设区域203、所述第一预设区域外侧的第二预设区域204以及所述第二预设区域外侧的第三预设区域205；所述多个辅助阴极接触孔202在所述第一预设区域203上的分布密度大于所述多个辅助阴极接触孔202在所述第二预设区域204上的分布密度，所述多个辅助阴极接触孔202在所述第二预设区域204上的分布密度大于所述多个辅助阴极接触孔202在所述第三预设区域205上的分布密度。
在本发明一个具体实施例中，所述第一预设区域203中每个像素对应设置一个辅助阴极接触孔。所述第二预设区域204中每4个像素设置3个辅助阴极接触孔。所述第三预设区域205中每4个像素设置2个辅助阴极接触孔。
其中，辅助阴极接触孔在显示面板的一个目标区域的分布密度可以是该目标区域中辅助阴极接触孔个数与像素个数的比值。以上述具体实施例为例，则所述第一预设区域203中每个像素对应设置一个辅助阴极接触孔，对应的辅助阴极接触孔分布密度为100%；第二预设区域204中每4个像素设置3个辅助阴极接触孔，对应的辅助阴极接触孔分布密度为75%；所述第三预设区域205中每4个像素设置2个辅助阴极接触孔，对应的辅助阴极接触孔分布密度为50%。
需要说明的是，上述具体实施例中，第一预设区域203、第二预设区域204、第三预设区域205中的分布密度仅为举例说明，可以理解的是，在本发明其他一些实施例中，第一预设区域203、第二预设区域204、第三预设区域205中的分布密度可以是其他数值，只需要保证所述多个辅助阴极接触孔202在所述第一预设区域203上的分布密度大于所述多个辅助阴极接触孔202在所述第二预设区域204上的分布密度，所述多个辅助阴极接触孔202在所述第二预设区域204上的分布密度大于所述多个辅助阴极接触孔202在所述第三预设区域205上的分布密度即可，具体不作限定。
本发明实施例中，辅助阴极的材料可以为Ag(银)、Pt(金)、Al(铝)、Mo(钼)、Cu(铜)等具有良好导电性的金属材料，其厚度例如可以为300～600nm，具体厚度可以根据需要设置。
本发明实施例中还提供一种显示面板，所述显示面板包括盖板和阵列基板，所述盖板设置在所述阵列基板之上，与所述阵列基板贴合。所述阵列基板上设置有辅助阴极和多个辅助阴极接触孔，所述多个辅助阴极接触孔在所述显示面板上的分布密度从边界到中心依次递增。
其中，所述阵列基板还可以包括：第一衬底；设置于所述第一衬底上的辅助阴极；设置于所述辅助阴极远离所述第一衬底一侧的包覆层，所述包覆层包覆所述辅助阴极，所述多个辅助阴极接触孔设置在所述包覆层上；设置于所述包覆层远离所述第一衬底的一侧导电层，所述导电层通过所述辅助阴极接触孔与所述辅助阴极电连接。
其中，所述阵列基板可以被分为最内的第一预设区域、所述第一预设区域外侧的第二预设区域以及所述第二预设区域外侧的第三预设区域；所述多个辅助阴极接触孔在所述第一预设区域上的分布密度大于所述多个辅助阴极接触孔在所述第二预设区域上的分布密度，所述多个辅助阴极接触孔在所述第二预设区域上的分布密度大于所述多个辅助阴极接触孔在所述第三预设区域上的分布密度。
在本发明一些实施例中，所述第一预设区域中每个像素可以对应设置一个辅助阴极接触孔。所述第二预设区域中每4个像素可以设置3个辅助阴极接触孔。所述第三预设区域中每4个像素设置2个辅助阴极接触孔。
另外，所述阵列基板还可以包括黑色矩阵，所述辅助阴极设置于所述黑色矩阵远离所述第一衬底一侧。同时，所述阵列基板还可以包括彩色滤光层，所述彩色滤光层设置于所述黑色矩阵远离所述第一衬底的一侧。
为了更好实施本发明实施例中显示面板，在显示面板基础之上，本发明实施例中还提供一种显示装置，该显示装置包括如上述显示面板实施例中任一实施例中所述的显示面板。
通过采用如上实施例中描述的显示面板，进一步提升了该显示装置的显示性能。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见上文针对其他实施例的详细描述，此处不再赘述。
以上对本发明实施例所提供的一种显示面板及显示装置进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。

Claims (20)

  1. 一种显示面板，其中，所述显示面板包括盖板，所述盖板上设置有辅助阴极和多个辅助阴极接触孔，所述多个辅助阴极接触孔在所述显示面板上的分布密度从边界到中心依次递增。
  2. 根据权利要求1所述的显示面板，其中，所述盖板还包括：
    第一衬底；
    设置于所述第一衬底上的辅助阴极；
    设置于所述辅助阴极远离所述第一衬底一侧的包覆层，所述包覆层包覆所述辅助阴极，所述多个辅助阴极接触孔设置在所述包覆层上；
    设置于所述包覆层远离所述第一衬底的一侧导电层，所述导电层通过所述辅助阴极接触孔与所述辅助阴极电连接。
  3. 根据权利要求1所述的显示面板，其中，所述盖板被分为最内的第一预设区域、所述第一预设区域外侧的第二预设区域以及所述第二预设区域外侧的第三预设区域；
    所述多个辅助阴极接触孔在所述第一预设区域上的分布密度大于所述多个辅助阴极接触孔在所述第二预设区域上的分布密度，所述多个辅助阴极接触孔在所述第二预设区域上的分布密度大于所述多个辅助阴极接触孔在所述第三预设区域上的分布密度。
  4. 根据权利要求3所述的显示面板，其中，所述第一预设区域中每个像素对应设置一个辅助阴极接触孔。
  5. 根据权利要求4所述的显示面板，其中，所述第二预设区域中每4个像素设置3个辅助阴极接触孔。
  6. 根据权利要求5所述的显示面板，其中，所述第三预设区域中每4个像素设置2个辅助阴极接触孔。
  7. 根据权利要求1所述的显示面板，其中，所述盖板还包括黑色矩阵，所述辅助阴极设置于所述黑色矩阵远离所述第一衬底一侧。
  8. 根据权利要求7所述的显示面板，其中，所述盖板还包括彩色滤光层，所述彩色滤光层设置于所述黑色矩阵远离所述第一衬底的一侧。
  9. 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阵列基板，所述盖板设置在所述阵列基板之上，与所述阵列基板贴合。
  10. 根据权利要求1所述的显示面板，其中，所述辅助阴极的材料可以为Ag、Pt、Al、Mo或Cu，所述辅助阴极的厚度为300~600nm。
  11. 一种显示装置，其中，所述显示装置包括显示面板，所述显示面板包括盖板，所述盖板上设置有辅助阴极和多个辅助阴极接触孔，所述多个辅助阴极接触孔在所述显示面板上的分布密度从边界到中心依次递增。
  12. 根据权利要求11所述的显示装置，其中，所述盖板还包括：
    第一衬底；
    设置于所述第一衬底上的辅助阴极；
    设置于所述辅助阴极远离所述第一衬底一侧的包覆层，所述包覆层包覆所述辅助阴极，所述多个辅助阴极接触孔设置在所述包覆层上；
    设置于所述包覆层远离所述第一衬底的一侧导电层，所述导电层通过所述辅助阴极接触孔与所述辅助阴极电连接。
  13. 根据权利要求11所述的显示装置，其中，所述盖板被分为最内的第一预设区域、所述第一预设区域外侧的第二预设区域以及所述第二预设区域外侧的第三预设区域；
    所述多个辅助阴极接触孔在所述第一预设区域上的分布密度大于所述多个辅助阴极接触孔在所述第二预设区域上的分布密度，所述多个辅助阴极接触孔在所述第二预设区域上的分布密度大于所述多个辅助阴极接触孔在所述第三预设区域上的分布密度。
  14. 根据权利要求13所述的显示装置，其中，所述第一预设区域中每个像素对应设置一个辅助阴极接触孔。
  15. 根据权利要求14所述的显示装置，其中，所述第二预设区域中每4个像素设置3个辅助阴极接触孔。
  16. 根据权利要求15所述的显示装置，其中，所述第三预设区域中每4个像素设置2个辅助阴极接触孔。
  17. 根据权利要求11所述的显示装置，其中，所述盖板还包括黑色矩阵，所述辅助阴极设置于所述黑色矩阵远离所述第一衬底一侧。
  18. 根据权利要求17所述的显示装置，其中，所述盖板还包括彩色滤光层，所述彩色滤光层设置于所述黑色矩阵远离所述第一衬底的一侧。
  19. 根据权利要求11所述的显示装置，其中，所述显示面板还包括阵列基板，所述盖板设置在所述阵列基板之上，与所述阵列基板贴合。
  20. 根据权利要求11所述的显示装置，其中，所述辅助阴极的材料可以为Ag、Pt、Al、Mo或Cu，所述辅助阴极的厚度为300~600nm。
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