WO2019237551A1 - 显示面板 - Google Patents

显示面板 Download PDF

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Publication number
WO2019237551A1
WO2019237551A1 PCT/CN2018/106579 CN2018106579W WO2019237551A1 WO 2019237551 A1 WO2019237551 A1 WO 2019237551A1 CN 2018106579 W CN2018106579 W CN 2018106579W WO 2019237551 A1 WO2019237551 A1 WO 2019237551A1
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Prior art keywords
layer
metal layer
display panel
segmented
electrically connected
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PCT/CN2018/106579
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English (en)
French (fr)
Inventor
方俊雄
吴元均
吕伯彦
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深圳市华星光电半导体显示技术有限公司
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Application filed by 深圳市华星光电半导体显示技术有限公司 filed Critical 深圳市华星光电半导体显示技术有限公司
Priority to US16/099,175 priority Critical patent/US10964768B1/en
Publication of WO2019237551A1 publication Critical patent/WO2019237551A1/zh

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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
    • H10K59/131—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
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/81—Anodes
    • H10K50/814—Anodes combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
    • 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
    • H10K59/80517—Multilayers, e.g. transparent multilayers
    • 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
    • H10K2102/10—Transparent electrodes, e.g. using graphene
    • H10K2102/101—Transparent electrodes, e.g. using graphene comprising transparent conductive oxides [TCO]
    • H10K2102/103—Transparent electrodes, e.g. using graphene comprising transparent conductive oxides [TCO] comprising indium oxides, e.g. ITO
    • 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
    • H10K59/124—Insulating layers formed between TFT elements and OLED elements

Definitions

  • the present invention relates to the field of display technology, and in particular, to a display panel.
  • Flat display panels are widely used in computers, televisions, monitors, portable electronic devices, etc. With the increasing demand for large-sized screens in portable electronic devices, devices with large display areas that use flat display panels have been used. Fully developed and commercialized.
  • Flexible display is a display technology with a competitive advantage in the future.
  • the display can be bent or rolled into any shape, light, thin and It is easy to carry and other features, especially its foldability, so that the panel can obtain a larger display area without occupying a larger space.
  • the scanning line in the active display area is made of metal materials and runs across the entire effective display area.
  • the low-temperature polysilicon thin film transistor (LTPS) TFT array substrate uses molybdenum metal as the scan. Wire materials, but molybdenum metal is a high temperature brittle material, the ductility is not good, when the bending radius of the panel is small, it is easy to break.
  • FIG. 1 it is a schematic diagram of a folding manner of an existing display panel. When the folding panel is folded along the bending line A / B, the horizontal scanning line of the general panel design will pass through the AA area. When the bending curvature radius is reduced, the metal line of the scanning line is prone to cracks.
  • FIG. 2 it is a schematic cross-sectional view of a conventional display panel.
  • the panel mainly includes a substrate 1, a buffer layer 2, a gate insulation (GI) layer 3, and a scan formed of molybdenum metal.
  • Line 4 interlayer insulation (ILD) layer 6, data line 7 and the like, among which scan line 4 has cracks 5 due to panel bending.
  • ILD interlayer insulation
  • the present invention provides a display panel including: a scan line formed by a first metal layer, a data line formed by a second metal layer, and interposed between the first metal layer and the second metal layer At least one dielectric layer; the scanning line is a segmented structure; each segmented scanning line forming a complete scanning line is electrically connected to the corresponding second metal layer connection pattern through a corresponding via of the dielectric layer, and The second metal layer connection pattern electrically connects the segmented scanning lines together; the data line has a segmented structure at the place where the second metal layer connection pattern is staggered, and constitutes each part of a complete data line.
  • the segment data lines are electrically connected to corresponding first metal layer connection patterns through corresponding vias in the dielectric layer, and the segment data lines are electrically connected together by the first metal layer connection pattern.
  • the dielectric layer is an interlayer insulating layer.
  • the second metal layer has a Ti / Al / Ti three-layer structure, a Mo / Al / Mo three-layer structure, or a Mo / Cu double-layer structure.
  • the first metal layer is molybdenum metal.
  • the invention also provides a display panel, comprising: a scan line formed by a first metal layer, a data line formed by a second metal layer, a conductive material layer for forming a conductive structure in the display panel, and a first At least one dielectric layer between the metal layer and the conductive material layer; the scanning line is a segmented structure; each segmented scanning line forming a complete scanning line passes through a corresponding via of the dielectric layer and a corresponding conductive layer respectively
  • the material layer connection pattern is electrically connected, and the segmented scanning lines are electrically connected together by the conductive material layer connection pattern.
  • the conductive material layer is an OLED anode material layer for forming an OLED anode.
  • the first metal layer is molybdenum metal; the OLED anode material layer has a three-layer structure of ITO / Ag / ITO.
  • the dielectric layer includes an organic flat layer and an interlayer insulating layer.
  • the scanning line is segmented in a bending area of the display panel or the entire effective display area.
  • the scanning line of the display panel of the present invention adopts a segmented structure, and then the segments are connected to each other, thereby reducing the probability of the scanning line breaking when the display panel is bent.
  • FIG. 1 is a schematic diagram of a folding manner of an existing display panel
  • FIG. 2 is a schematic cross-sectional view of a conventional display panel
  • FIG. 3 is a schematic cross-sectional view of a first preferred embodiment of a display panel according to the present invention.
  • FIG. 4 is a schematic top view of a first preferred embodiment of the present invention.
  • FIG. 5 is a schematic cross-sectional view of a second preferred embodiment of a display panel according to the present invention.
  • FIG. 3 is a schematic cross-sectional view of a first preferred embodiment of a display panel of the present invention
  • FIG. 4 is a schematic top view of the first preferred embodiment of the present invention, and the structure formed by the scan line metal layer in FIG. Dotted lines.
  • the display panel of the present invention may be a flexible, bendable, or foldable display panel, and mainly includes: a horizontal scanning line formed by a scanning line metal layer and penetrating the entire effective display area, and a scanning line formed by a data line metal layer and penetrating the entire effective display area. Vertical data lines, and at least one dielectric layer 60 between the scan line metal layer and the data line metal layer.
  • the dielectric layer 60 may specifically be an interlayer insulation layer; the scan lines are segmented structures to form a complete scan line. Each segmented scanning line 41 is electrically connected to the corresponding data line metal layer connection pattern 71 through a corresponding via 61 of the dielectric layer 60, and each segmented scanning line 41 is electrically connected to the data line metal layer connection pattern 71.
  • the data line metal layer connection pattern 71 may be a trace shape extending along the scan line direction; the data line is a segmented structure where the data line metal layer connection pattern 71 intersects, forming a complete Each segmented data line 72 of the data line is electrically connected to the corresponding scanning line metal layer connection pattern 42 through the corresponding via hole 62 of the dielectric layer 60, and the scanning line gold
  • the metal layer connection pattern 42 electrically connects the segmented data lines 72 together to form a complete data line.
  • the scan line metal layer connection pattern 42 may be a line shape extending along the data line direction.
  • the metal of the data line metal layer can be filled in the vias 61 and 62, and the data line metal layer connection pattern 71 or the segmented data line 72 is connected to the metal layer of the scan line below through the via 61 or 62.
  • the segmented scanning line 41 or the scanning line metal layer connection pattern 42 realizes electrical connection.
  • the area segmented by the scan line may be located only in the bending area of the display panel or throughout the entire effective display area.
  • the display panel further includes structures such as a substrate 1, a buffer layer 2, and a gate insulating layer 3 which are sequentially stacked from bottom to top, and details are not described herein again.
  • the design of the scanning line of the display panel folding area uses multiple sections of molybdenum metal instead of the entire molybdenum metal to penetrate the effective display area.
  • the interlayer insulation layer vias and the more ductile data line metal connection are used in the middle.
  • the material of the data line can be a Ti / Al / Ti three-layer structure, a Mo / Al / Mo three-layer structure, or a Mo / Cu double-layer structure, etc., which can reduce the probability of the molybdenum metal fracture when the panel is bent.
  • the display panel of the present invention may be a flexible, bendable, or foldable display panel, and mainly includes: a horizontal scanning line formed by a scanning line metal layer and penetrating the entire effective display area, and a scanning line formed by a data line metal layer and penetrating the entire effective display area.
  • the vertical data line 7 is used to form a conductive material layer of a conductive structure in a display panel, and at least one dielectric layer between the scan line metal layer and the conductive material layer; in this embodiment, the conductive material layer may be used.
  • the dielectric layer may include an organic flat layer (PLN) 8 and an interlayer insulating layer 60; the scanning lines are segmented structures; each segmented scanning line 41 forming a complete scanning line passes through the layers respectively Corresponding vias 63 and 81 of the inter-insulating layer 60 and the organic flat layer 8 are electrically connected to the corresponding conductive material layer connection pattern 9, and the segmented scanning lines 41 are electrically connected together by the conductive material layer connection pattern 9.
  • a complete scanning line is formed, and the conductive material layer connection pattern 9 may be a line shape extending along the scanning line direction.
  • the material of the conductive material layer that is, the OLED anode material
  • the conductive material layer connection pattern 9 connects the sub-scanning metal layer through the via holes 63 and 81.
  • the segment scanning lines 41 are electrically connected. The area segmented by the scan line may be located only in the bending area of the display panel or throughout the entire effective display area.
  • the display panel further includes structures such as a substrate 1, a buffer layer 2, and a gate insulating layer 3 which are sequentially stacked from bottom to top, and details are not described herein again.
  • the scanning line metal layer can be molybdenum metal; the OLED anode material layer can be a three-layer structure of ITO / Ag / ITO; the data line metal layer can be a three-layer structure of Ti / Al / Ti, a three-layer structure of Mo / Al / Mo, or Mo / Cu double-layer structure.
  • the scanning line of the display panel folded area uses a plurality of sections of molybdenum metal instead of the entire molybdenum metal to penetrate the effective display area.
  • the data line 7 and the organic flat layer 8 between the OLED anode material layers are used.
  • Hole 81 which connects the OLED anode material with the scanning line metal.
  • the top-emitting OLED anode material can use silver with better ductility as the reflective electrode.
  • As the connection material to connect the scanning line it can reduce the breakage of the molybdenum metal scanning line when the display panel is bent. The probability of occurrence of the interlayer insulating layer 60 can be reduced at the same time, to avoid cracks in the interlayer insulating layer 60 during bending.
  • the scanning line of the display panel of the present invention adopts a segmented structure, and then the segments are connected to each other, thereby reducing the probability of the scanning line breaking when the display panel is bent.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

一种显示面板，包括：由第一金属层形成的扫描线（41），由第二金属层形成的数据线（72），以及介于第一金属层和第二金属层之间的至少一介质层（60）；扫描线（41）为分段结构；组成一条完整扫描线（41）的各分段扫描线（41）分别通过介质层（60）的相应过孔（61）与相应的第二金属层连接图案（71）电性连接，由第二金属层连接图案（71）将各分段扫描线（41）电性连接在一起；数据线（72）在与第二金属层连接图案（71）交错的地方为分段结构，组成一条完整数据线（72）的各分段数据线（72）分别通过介质层（60）的相应过孔（61）与相应的第一金属层连接图案（42）电性连接，由第一金属层连接图案（42）将各分段数据线（72）电性连接在一起。显示面板扫描线（41）采用分段结构，降低显示面板弯折时扫描线（41）断裂的发生机率。

Description

显示面板 技术领域
本发明涉及显示技术领域，尤其涉及一种显示面板。
背景技术
平面显示面板被广泛应用于计算机、电视、监视器、便携式电子装置等方面，随着市场对便携式电子装置中的大尺寸屏幕的需求不断增加，使用平面显示面板的具有大尺寸显示区域的设备已被完全开发和商业化。
随着更先进的制造设备和材料工程技术的发展，可弯曲、可折叠以及曲面显示在电子产品中的应用日益丰富，为电子产品制造商带来了丰厚的获利机会。
柔性显示是未来极具竞争优势的显示技术，通过将柔性显示介质电子元件与材料安装在有柔性或可弯曲的基板上，使得显示器具有能够弯曲或卷曲成任意形状的特性，有轻、薄且方便携带等特点，尤其是其可折叠性，使得面板可以获得更大的显示区域而不会占据更大的空间。
传统的面板设计，有效显示区(AA)内扫描线(Scan line)是使用金属材料线状走线跨越整个有效显示区,一般的低温多晶硅薄膜晶体管(LTPS TFT)阵列基板会采用钼金属当做扫描线材料,但是钼金属属于高温脆性材料,延展性不佳,当面板弯折的曲率半径较小时容易产生断裂情况。参见图1，其为现有显示面板折叠方式示意图。折叠式面板沿弯折线A/B折叠时,一般面板设计水平扫描线会贯穿AA区,当弯折曲率半径缩小时,扫描线的金属线容易产生裂纹。参见图2，其为一种现有显示面板的剖面示意图，面板主要包括由下至上顺序设置的基板1，缓冲(Buffer)层2，栅极绝缘(GI)层3，由钼金属形成的扫描线4，层间绝缘(ILD)层6，数据线(Data line)7等，其中扫描线4由于面板弯曲产生了裂纹5。
发明内容
因此，本发明的目的在于提供一种显示面板，降低显示面板弯折时扫描线断裂的发生机率。
为实现上述目的，本发明提供了一种显示面板，包括：由第一金属层形成的扫描线，由第二金属层形成的数据线，以及介于第一金属层和第二金属层之间的至少一介质层；所述扫描线为分段结构；组成一条完整扫描 线的各分段扫描线分别通过所述介质层的相应过孔与相应的第二金属层连接图案电性连接，由所述第二金属层连接图案将各分段扫描线电性连接在一起；所述数据线在与所述第二金属层连接图案交错的地方为分段结构，组成一条完整数据线的各分段数据线分别通过所述介质层的相应过孔与相应的第一金属层连接图案电性连接，由所述第一金属层连接图案将各分段数据线电性连接在一起。
其中，所述介质层为层间绝缘层。
其中，所述第二金属层为Ti/Al/Ti三层结构，Mo/Al/Mo三层结构，或Mo/Cu双层结构。
其中，所述第一金属层为钼金属。
其中，所述扫描线在显示面板的弯折区或整个有效显示区分段。
本发明还提供了一种显示面板，包括：由第一金属层形成的扫描线，由第二金属层形成的数据线，用于形成显示面板中导电结构的导电材料层，以及介于第一金属层和所述导电材料层之间的至少一介质层；所述扫描线为分段结构；组成一条完整扫描线的各分段扫描线分别通过所述介质层的相应过孔与相应的导电材料层连接图案电性连接，由所述导电材料层连接图案将各分段扫描线电性连接在一起。
其中，所述导电材料层为用于形成OLED阳极的OLED阳极材料层。
其中，所述第一金属层为钼金属；所述OLED阳极材料层为ITO/Ag/ITO三层结构。
其中，所述介质层包括有机平坦层和层间绝缘层。
其中，所述扫描线在显示面板的弯折区或整个有效显示区分段。
综上，本发明的显示面板扫描线采用分段结构,再将各分段之间连接起来，从而降低显示面板弯折时扫描线断裂的发生机率。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其他有益效果显而易见。
附图中，
图1为现有显示面板折叠方式示意图；
图2为一种现有显示面板的剖面示意图；
图3为本发明显示面板第一较佳实施例的剖面示意图；
图4为本发明第一较佳实施例的俯视示意图；
图5为本发明显示面板第二较佳实施例的剖面示意图。
具体实施方式
参见图3及图4，图3为本发明显示面板第一较佳实施例的剖面示意图，图4为本发明第一较佳实施例的俯视示意图，图4中扫描线金属层所形成结构以虚线表示。本发明的显示面板可以为柔性、可弯曲或折叠式显示面板，主要包括：由扫描线金属层形成的贯穿整个有效显示区的横向的扫描线，由数据线金属层形成的贯穿整个有效显示区的纵向的数据线，以及介于扫描线金属层和数据线金属层之间的至少一介质层60，介质层60具体可以为层间绝缘层；扫描线为分段结构，组成一条完整扫描线的各分段扫描线41分别通过介质层60的相应过孔61与相应的数据线金属层连接图案71电性连接，由所述数据线金属层连接图案71将各分段扫描线41电性连接在一起形成一条完整扫描线，数据线金属层连接图案71可以为沿扫描线方向延伸的走线形状；数据线在与数据线金属层连接图案71交错的地方为分段结构，组成一条完整数据线的各分段数据线72分别通过介质层60的相应过孔62与相应的扫描线金属层连接图案42电性连接，由扫描线金属层连接图案42将各分段数据线72连电性接在一起形成一条完整数据线，扫描线金属层连接图案42可以为沿数据线方向延伸的走线形状。
制作本发明的显示面板时，数据线金属层的金属可以填充于过孔61和62中，数据线金属层连接图案71或分段数据线72通过过孔61或62连接下方扫描线金属层的分段扫描线41或扫描线金属层连接图案42，实现电性连接。扫描线分段的区域可以仅位于显示面板的弯折区或遍及整个有效显示区。显示面板还包括由下至上顺序层叠的基板1，缓冲层2，栅极绝缘层3等结构，在此不再赘述。
第一较佳实施例中，显示面板折叠区扫描线采用多段的钼金属取代整条钼金属贯穿有效显示区的设计方式,中间使用层间绝缘层过孔以及延展性较佳的数据线金属连接，数据线材质可以为Ti/Al/Ti三层结构，Mo/Al/Mo三层结构或是Mo/Cu双层结构等,如此可以降低面板弯折时钼金属断裂的发生机率。
参见图5，其为本发明显示面板第二较佳实施例的剖面示意图。本发明的显示面板可以为柔性、可弯曲或折叠式显示面板，主要包括：由扫描线金属层形成的贯穿整个有效显示区的横向的扫描线，由数据线金属层形成的贯穿整个有效显示区的纵向的数据线7，用于形成显示面板中导电结构的 导电材料层，以及介于扫描线金属层和导电材料层之间的至少一介质层；在此实施例中导电材料层可以为用于形成OLED阳极的OLED阳极材料层，介质层可以包括有机平坦层(PLN)8和层间绝缘层60；扫描线为分段结构；组成一条完整扫描线的各分段扫描线41分别通过层间绝缘层60和有机平坦层8的相应过孔63和81与相应的导电材料层连接图案9电性连接，由所述导电材料层连接图案9将各分段扫描线41电性连接在一起形成一条完整扫描线，导电材料层连接图案9可以为沿扫描线方向延伸的走线形状。
制作本发明的显示面板时，导电材料层的材料即OLED阳极材料可以填充于上下连通的过孔63和81中，导电材料层连接图案9通过过孔63和81连接下方扫描线金属层的分段扫描线41，实现电性连接。扫描线分段的区域可以仅位于显示面板的弯折区或遍及整个有效显示区。显示面板还包括由下至上顺序层叠的基板1，缓冲层2，栅极绝缘层3等结构，在此不再赘述。扫描线金属层可以为钼金属；OLED阳极材料层可以为ITO/Ag/ITO三层结构；数据线金属层可以为Ti/Al/Ti三层结构，Mo/Al/Mo三层结构，或Mo/Cu双层结构。
第二较佳实施例中，显示面板折叠区扫描线采用多段的钼金属取代整条钼金属贯穿有效显示区的设计方式,中间使用数据线7与OLED阳极材料层间的有机平坦层8的过孔81,将OLED阳极材料与扫描线金属连接,顶发射OLED阳极材料可以采用延展性较佳的银当反射电极，做为连接扫描线的连接材料可以降低显示面板弯折时钼金属扫描线断裂的发生机率,同时可以将下方的层间绝缘层60厚度减薄,避免弯折时层间绝缘层60发生裂痕。
综上，本发明的显示面板扫描线采用分段结构,再将各分段之间连接起来，从而降低显示面板弯折时扫描线断裂的发生机率。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (10)

  1. 一种显示面板，包括：由第一金属层形成的扫描线，由第二金属层形成的数据线，以及介于第一金属层和第二金属层之间的至少一介质层；所述扫描线为分段结构；组成一条完整扫描线的各分段扫描线分别通过所述介质层的相应过孔与相应的第二金属层连接图案电性连接，由所述第二金属层连接图案将各分段扫描线电性连接在一起；所述数据线在与所述第二金属层连接图案交错的地方为分段结构，组成一条完整数据线的各分段数据线分别通过所述介质层的相应过孔与相应的第一金属层连接图案电性连接，由所述第一金属层连接图案将各分段数据线电性连接在一起。
  2. 如权利要求1所述的显示面板，其中，所述介质层为层间绝缘层。
  3. 如权利要求1所述的显示面板，其中，所述第二金属层为Ti/Al/Ti三层结构，Mo/Al/Mo三层结构，或Mo/Cu双层结构。
  4. 如权利要求1所述的显示面板，其中，所述第一金属层为钼金属。
  5. 如权利要求1所述的显示面板，其中，所述扫描线在显示面板的弯折区或整个有效显示区分段。
  6. 一种显示面板，包括：由第一金属层形成的扫描线，由第二金属层形成的数据线，用于形成显示面板中导电结构的导电材料层，以及介于第一金属层和所述导电材料层之间的至少一介质层；所述扫描线为分段结构；组成一条完整扫描线的各分段扫描线分别通过所述介质层的相应过孔与相应的导电材料层连接图案电性连接，由所述导电材料层连接图案将各分段扫描线电性连接在一起。
  7. 如权利要求6所述的显示面板，其中，所述导电材料层为用于形成OLED阳极的OLED阳极材料层。
  8. 如权利要求7所述的显示面板，其中，所述第一金属层为钼金属；所述OLED阳极材料层为ITO/Ag/ITO三层结构。
  9. 如权利要求6所述的显示面板，其中，所述介质层包括有机平坦层和层间绝缘层。
  10. 如权利要求6所述的显示面板，其中，所述扫描线在显示面板的弯折区或整个有效显示区分段。
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