WO2021254420A1 - Oled显示面板及显示装置 - Google Patents

Oled显示面板及显示装置 Download PDF

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Publication number
WO2021254420A1
WO2021254420A1 PCT/CN2021/100521 CN2021100521W WO2021254420A1 WO 2021254420 A1 WO2021254420 A1 WO 2021254420A1 CN 2021100521 W CN2021100521 W CN 2021100521W WO 2021254420 A1 WO2021254420 A1 WO 2021254420A1
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Prior art keywords
layer
metal
oled
metal mesh
electrode
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PCT/CN2021/100521
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English (en)
French (fr)
Inventor
汪江胜
蒲世民
刘文红
刘奇
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京东方科技集团股份有限公司
成都京东方光电科技有限公司
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Priority to US17/770,667 priority Critical patent/US20220375998A1/en
Publication of WO2021254420A1 publication Critical patent/WO2021254420A1/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
    • H10K59/40—OLEDs integrated with touch screens
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/552—Protection against radiation, e.g. light or electromagnetic waves
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

Definitions

  • the present disclosure relates to the technical field of flexible OLEDs, and in particular to OLED display panels and display devices.
  • OLED Organic Light-Emitting Diode, organic light-emitting diode
  • OLEDs can be divided into rigid OLEDs and flexible OLEDs. Because flexible OLEDs can be made into curved, folded, and curled products, flexible OLEDs have been widely studied.
  • Flexible OLED products can be divided into three categories based on touch panel technology: plug-in, On-cell (FMLOC, Flexible Multi-Layer On Cell), and In-cell.
  • plug-in On-cell
  • FMLOC Flexible Multi-Layer On Cell
  • In-cell In-cell.
  • the plug-in process is low in difficulty, but FMLOC has gradually become the mainstream of high-end AMOLED mobile phone screens in the market due to its thinner structure, narrower frame, and better optical effects.
  • the disadvantages of FMLOC are: 1. Low signal-to-noise ratio. Since the touch electrode is directly vapor-deposited on the surface of the encapsulation layer of the OLED, the distance between the touch electrode and the OLED is shortened, and the crosstalk of the OLED signal is serious. Affects the signal reception of the touch electrode, resulting in a significant increase in the noise received by the touch panel, resulting in a low signal-to-noise ratio; 2.
  • RC loading is too large, because the distance between the touch electrode and the OLED is shortened, so the OLED The parasitic capacitance formed between the panel and the touch panel is too large, so that the RC loading (resistive capacitive load) is too large, which seriously affects the charging time of the touch panel.
  • the impedance of the touch electrode will be higher, and the two shortcomings of FMLOC will further affect the touch performance.
  • embodiments of the present disclosure provide an OLED display panel, including an OLED layer and a touch panel layer disposed on the OLED layer, the touch panel layer including a first metal mesh layer, and the first An insulating layer is provided on a side of the metal mesh layer close to the OLED layer, and a second metal mesh layer and a bridging metal layer are provided on the side of the insulating layer close to the OLED layer;
  • the bridging metal layer and the second metal grid layer are in the same layer and provided in isolation, and the bridging metal layer is connected to the first metal grid layer through a through hole penetrating the insulating layer.
  • the first metal mesh layer, the second metal mesh layer, and the bridge metal layer all have a mesh structure, and the first metal mesh layer, the second metal mesh layer, and the second metal mesh layer have a mesh structure.
  • the mesh density of the metal mesh layer and the bridge metal layer are the same.
  • the orthographic projection of the second metal grid layer on the OLED layer at least partially covers the orthographic projection of the first metal grid layer on the OLED layer.
  • the material of the second metal mesh layer and the bridging metal layer are the same.
  • the first metal mesh layer includes a plurality of driving electrodes and a plurality of sensing electrodes, and the driving electrodes and the sensing electrodes are intersected and arranged in insulation. At the intersection, the sub-electrode of one of the driving electrode and the sensing electrode is connected through the bridging metal layer.
  • a floating electrode is provided in the driving electrode and the sensing electrode, the floating electrode is insulated from the driving electrode and the sensing electrode, and the floating electrode is separated from the driving electrode.
  • the electrode and the sensing electrode are arranged in the same layer.
  • the touch panel layer further includes an organic layer, and the organic layer is disposed on a side of the first metal mesh layer away from the OLED layer.
  • a buffer layer is provided between the OLED layer and the second metal mesh layer.
  • the second metal grid layer is configured to be connected to a level signal supply terminal.
  • embodiments of the present disclosure provide a display device including the above-mentioned OLED display panel.
  • embodiments of the present disclosure provide a method for manufacturing an OLED display panel, including:
  • a first metal mesh layer is formed on a side of the insulating layer away from the OLED layer, and the bridging metal layer is connected to the first metal mesh layer through a through hole penetrating the insulating layer.
  • the first metal mesh layer, the second metal mesh layer, and the bridge metal layer are all formed into a mesh structure with the same mesh density.
  • the second metal mesh layer and the first metal mesh layer are formed such that the orthographic projection of the second metal mesh layer on the OLED layer at least partially covers the first metal mesh layer.
  • the orthographic projection of the metal grid layer on the OLED layer is formed such that the orthographic projection of the second metal mesh layer on the OLED layer.
  • the second metal mesh layer and the bridge metal layer are formed by using the same material and the same patterning process.
  • the first metal mesh layer is formed to include a plurality of driving electrodes and a plurality of sensing electrodes, and the driving electrodes and the sensing electrodes are intersected and arranged in an insulated manner. At the intersection of the electrodes, a sub-electrode of one of the driving electrode and the sensing electrode is formed to be connected through the bridging metal layer.
  • the first metal mesh layer includes a plurality of driving electrodes and a plurality of sensing electrodes, and the method further includes:
  • a floating electrode is formed in the same layer as the first metal mesh layer, and the floating electrode is insulated from the driving electrode and the sensing electrode.
  • the manufacturing method of the OLED display panel further includes:
  • An organic layer is formed on the side of the first metal mesh layer away from the OLED.
  • the manufacturing method of the OLED display panel further includes:
  • a buffer layer is formed between the OLED layer and the second metal mesh layer.
  • the second metal mesh layer is formed to be connectable to a level signal supply terminal.
  • FIG. 1 is a schematic diagram of a cross-sectional structure of an OLED display panel according to an embodiment of the disclosure
  • FIG. 2 is a schematic diagram of a second metal mesh layer of an OLED display panel according to an embodiment of the disclosure
  • Figure 3 shows a schematic diagram of the relationship between the first metal grid layer and the second metal grid layer
  • FIG. 4 shows a flow chart of a manufacturing method of an OLED display panel according to an embodiment of the present disclosure.
  • an embodiment of the present disclosure provides an OLED display panel, including an OLED layer 1 and a touch panel layer disposed on the OLED layer 1.
  • the touch panel layer includes an organic layer 7, and the organic layer 7 is close to the OLED
  • One side of the layer 1 is provided with a first metal mesh layer 6.
  • the side of the first metal mesh layer 6 close to the OLED layer 1 is provided with an insulating layer 5, and the side of the insulating layer 5 close to the OLED layer 1 is provided with a second metal mesh layer 3, A buffer layer 2 is provided between the OLED layer 1 and the second metal mesh layer 3.
  • the second metal mesh layer 3 can be connected to a touch chip.
  • a second metal mesh layer 3 is additionally provided between the insulating layer 5 and the buffer layer 2.
  • the second metal mesh layer 3 can be connected to the touch chip through peripheral leads, and the second metal mesh layer Layer 3 shields the noise of the display panel, and further reduces the loading of the touch panel layer, thereby reducing the noise of the display panel and improving the signal-to-noise ratio of touch.
  • the second metal mesh layer 3 sends a level signal, so that the second metal mesh layer 3 is not subject to electrical interference from the OLED layer 1 and realizes the shielding of the noise of the display panel.
  • Both the first metal mesh layer 6 and the second metal mesh layer 3 may have a mesh structure.
  • the second metal mesh layer 3 only needs to be connected to the level signal supply terminal.
  • the orthographic projection of the second metal grid layer 3 on the OLED layer 1 at least partially covers the orthographic projection of the first metal grid layer 6 on the OLED layer 1.
  • the second metal mesh 3 is provided to realize the shielding of the noise of the display panel, and the second metal mesh 3 is arranged between the first metal mesh layer 6 and the OLED layer 1 to achieve this. effect.
  • each sub-pixel is provided at the position corresponding to a part of the grid of the first metal grid layer 6.
  • the second The metal grid layer 3 is arranged such that the orthographic projection of the second metal grid layer 3 on the OLED layer 1 at least partially covers the orthographic projection of the first metal grid layer 6 on the OLED layer 1 to ensure that the second metal grid layer 3. Shield the noise of the display panel.
  • the mesh density of the second metal mesh layer 3 is the same as the mesh density of the first metal mesh layer 6.
  • FIG. 2 a schematic diagram of the structure of the second metal mesh layer 3 is given, that is, the second metal mesh layer 3 has a mesh structure.
  • the mesh of the second metal mesh layer 3 The density is set to be the same as the grid density of the first metal grid layer 6, which can avoid the generation of optical moiré and avoid affecting the display performance of the display panel.
  • two grid layers with the same grid density can use the same mask.
  • the preparation of the diaphragm facilitates the preparation of the second metal grid layer 3, and the process is not too complicated.
  • the second metal mesh layer 3 includes a plurality of metal wires interlaced with each other.
  • the second metal mesh layer 3 provided in this embodiment is interconnected metal wires, and each metal wire is connected to each other and finally can be connected to the touch chip to shield the noise of the display panel.
  • the insulating layer 5 is provided with a through hole, and the side of the insulating layer 5 close to the OLED layer 1 is provided with a bridging metal layer 4, and the bridging metal layer 4 passes through the through hole. It is connected to the first metal mesh layer 6.
  • a through hole is provided on the insulating layer 5, a bridging metal layer 4 is provided between the insulating layer 5 and the buffer layer 2, and the bridging metal layer 4 is connected to the first metal mesh layer 6.
  • the bridging metal layer 4 and the second metal mesh layer 3 are arranged in the same layer, and the bridging metal layer 4 also has a mesh structure.
  • the mesh density of the bridging metal layer 4 may be the same as the mesh density of the first metal mesh layer 6 and the second metal mesh layer 3.
  • the second metal mesh layer 3 and the bridging metal layer 4 are arranged on the same layer.
  • the structure formed when the bridging metal layer 4 is prepared is sufficient for the preparation of the second metal mesh layer 3.
  • the second metal mesh layer 3 and the bridge metal layer 4 are prepared.
  • the process steps will not become complicated.
  • the second metal mesh layer 3 and The bridging metal layer 4 is arranged on the same layer, which will not cause too much change to the structure of the entire display panel, and the thickness of the display panel will not change significantly.
  • the second metal mesh layer 3 and the bridge metal layer 4 are insulated from each other.
  • the bridge metal layer 4 is connected to the first metal mesh layer 6.
  • the second metal mesh layer 3 is designed to shield the noise of the display panel, and it can be connected to a driving chip (such as a touch chip). ), so the second metal mesh layer 3 and the bridging metal layer 4 are insulated from each other, and the two do not contact each other.
  • the first metal mesh layer 6 has a plurality of driving electrodes arranged in parallel along a first direction (for example, the vertical direction of the display panel) and a plurality of driving electrodes arranged in parallel along a second direction (for example, the horizontal direction of the display panel). ) A plurality of sensing electrodes arranged in parallel, the driving electrodes and the sensing electrodes are intersected, and at the intersection of the driving electrodes and the sensing electrodes, the driving electrodes are insulated from the sensing electrodes, the The sub-electrodes of the driving electrode or the sensing electrode may be bridged by the bridging metal layer 4.
  • the first metal mesh layer 6 has a plurality of sensing electrodes 61 and a plurality of driving electrodes 62, and the sub-electrodes of the driving electrode 62 are connected through the bridging metal layer 4.
  • the description is given as an example, but the present disclosure is not limited to this. In fact, the sensing electrode 61 and the driving electrode 62 are interchangeable.
  • the driving electrodes may be driven in a bilateral driving manner.
  • driving signals can be input from both ends of each driving electrode for driving.
  • the first metal mesh layer 6 has a plurality of driving electrodes and a plurality of sensing electrodes, and each of the driving electrodes and each of the sensing electrodes is provided with a plurality of floating electrodes spaced apart from each other.
  • An electrode (dummy), the floating electrode is insulated from the driving electrode and the sensing electrode, and the floating electrode is provided in the same layer as the driving electrode and the sensing electrode.
  • the OLED display panel in this embodiment includes an OLED layer 1 and a touch panel layer disposed on the OLED layer 1.
  • the touch panel layer includes a buffer layer 2, which is disposed on the OLED layer 1.
  • the material of the buffer layer 2 can be prepared with TFE (tetrafluoroethylene) material, and then the second metal grid layer 3 and the bridge metal layer 4, the second metal grid layer 3 and the bridge metal layer 4 are prepared on the buffer layer 2.
  • TFE tetrafluoroethylene
  • the same layer arrangement can be prepared at the same time.
  • the second metal grid layer 3 and the bridge metal layer 4 are insulated.
  • a floating electrode can also be arranged between the second metal grid layer 3 and the bridge metal layer 4.
  • the placement electrode refers to a metal layer structure without electrical signals, which is insulated from the second metal mesh layer 3 and the bridge metal layer 4; then an insulating layer 5, an insulating layer 5 are provided on the second metal mesh layer 3 and the bridge metal layer 4
  • a first metal mesh layer 6 is provided on the insulating layer with openings for connecting the bridging metal layer 4 and the first metal mesh layer 6.
  • the first metal mesh layer 6 includes a plurality of driving electrodes Tx and a plurality of sensing electrodes Rx, the driving electrode and the sensing electrode are insulated, and a floating electrode can be set between the driving electrode and the sensing electrode.
  • the floating electrode is not in contact with the driving electrode and the sensing electrode and is an area without electrical signals. This way The setting of, makes the preparation of each metal mesh layer (the first metal mesh layer 6 and the second metal mesh layer 3) more simple and convenient, and finally an organic layer 7 is provided on the first metal mesh layer 6.
  • a second metal mesh layer 3 is added to the layer where the bridge metal layer 4 is located.
  • the second metal mesh layer 3 can be connected to the touch chip through a peripheral circuit, and is shielded by the second metal mesh layer 3
  • the noise of the display panel reduces the loading of the touch layer, thereby reducing the noise of the display panel and improving the signal-to-noise ratio of touch; in some embodiments, the second metal mesh layer 3 and the first metal mesh
  • the distribution density of the grid layer 6 is kept consistent, to avoid optical moiré, and to ensure the display performance of the display panel.
  • FIG. 3 shows a schematic diagram of the relationship between the first metal mesh layer and the second metal mesh layer.
  • the first metal mesh layer 6 including a plurality of sensing electrodes 61 and a plurality of driving electrodes 62, and the sub-electrodes of the driving electrodes 62 are connected through the bridging metal layer 4 as an example, as shown in the left part of FIG. 3,
  • the sensing electrodes 61 are arranged in parallel along the first direction
  • the driving electrodes 62 are arranged in parallel along the second direction
  • the sensing electrodes 61 and the driving electrodes 62 are arranged crosswise.
  • the right part of FIG. 3 shows an enlarged schematic diagram of the intersection of the sensing electrode 61 and the driving electrode 62.
  • the sensing electrode 61 and the driving electrode 62 are both With a grid structure, the sensing electrodes 61 can be arranged and connected in the same layer.
  • the sub-electrodes of the driving electrodes 62 are connected through the bridging metal layer 4,
  • the second metal mesh layer 3 and the bridging metal layer 4 are in the same layer and insulated from each other.
  • the bridging metal layer 4 also has a mesh structure, but it is blocked in the figure.
  • An embodiment of the present disclosure also provides a display device including the above-mentioned OLED display panel.
  • the display device may also include other necessary components, such as a power supply.
  • the display device can be any product or component with display function such as electronic paper, liquid crystal display panel, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame, navigator, etc.
  • the embodiment of the present disclosure also provides a method for manufacturing an OLED display panel, as shown in FIG. 4, including the steps:
  • the noise of the display panel can be shielded, the load of the touch panel is reduced, the noise of the display panel is reduced, and the signal-to-noise ratio of the touch is improved.
  • the first metal mesh layer, the second metal mesh layer, and the bridge metal layer can all be formed into a mesh structure with the same mesh density, which can avoid the generation of optical moiré, and the display performance of the display panel can be avoided.
  • the grid layer with the same grid density can be prepared using the same mask, which is easy to prepare and the process is not too complicated.
  • the second metal mesh layer and the first metal mesh layer may be formed such that the second metal mesh layer is on the OLED layer.
  • the orthographic projection at least partially covers the orthographic projection of the first metal grid layer on the OLED layer, which can ensure that the second metal grid layer can shield the noise of the display panel.
  • the second metal grid layer and the bridge metal layer are in the same layer and can be formed into a grid structure with the same grid density, the same material can be used and the same patterning process (such as exposure, etching, development, etc.) can be used ) Simultaneously forming the second metal grid layer and the bridge metal layer, the process steps will not become complicated, and will not cause too many changes to the structure of the prepared display panel, and the thickness of the display panel will not change significantly .
  • the first metal mesh layer may be formed to include a plurality of driving electrodes arranged in parallel in a first direction (for example, the vertical direction of the display panel) and a plurality of driving electrodes arranged in parallel in a second direction (for example, the horizontal direction of the display panel). )
  • a plurality of sensing electrodes arranged in parallel, the driving electrodes and the sensing electrodes are intersected and insulated, and at the intersection of the driving electrodes and the sensing electrodes, one of the driving electrodes and the sensing electrodes is The sub-electrodes are formed to be connected through the bridging metal layer.
  • the sensing electrode may be formed and connected in the same layer, and at the intersection of the driving electrode and the sensing electrode, the sub-electrodes of the driving electrode may be connected through the bridging metal layer, but the present disclosure is not limited to this In fact, it is also possible that the driving electrodes are formed and connected in the same layer, and the sub-electrodes of the sensing electrodes are connected through the bridging metal layer, which can be selected by those skilled in the art as required.
  • the manufacturing method of the OLED display panel may further include:
  • a floating electrode is formed in the same layer as the first metal mesh layer, and the floating electrode is insulated from the driving electrode and the sensing electrode.
  • the floating electrode has a metal layer structure without electrical signals
  • the manufacturing method of the OLED display panel may further include:
  • An organic layer is formed on the side of the first metal mesh layer away from the OLED.
  • the organic layer may be a protective layer.
  • the manufacturing method of the OLED display panel may further include:
  • a buffer layer is formed between the OLED layer and the second metal mesh layer.
  • the second metal grid layer can be formed to connect to a level signal supply terminal, for example, a touch chip can be connected, and a level signal can be sent to the second metal grid layer through the touch chip, so that the The second metal mesh layer is not electrically interfered by the OLED layer, so as to realize the shielding of the noise of the display panel.

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Abstract

本申请公开了一种OLED显示面板及一种显示装置，包括OLED层和设置在所述OLED层上的触控面板层，所述触控面板层包括第一金属网格层，所述第一金属网格层的靠近所述OLED层的一侧设有绝缘层，所述绝缘层的靠近所述OLED层的一侧设有第二金属网格层和桥接金属层，所述桥接金属层与所述第二金属网格层同层且绝缘设置，且所述桥接金属层通过贯穿所述绝缘层中的通孔连接至所述第一金属网格层。

Description

OLED显示面板及显示装置
相关申请的交叉引用
本申请要求于2020年6月18日提交的中国专利申请NO.202010559945.2的优先权，该中国专利申请的内容通过引用的方式整体合并于此。
技术领域
本公开涉及柔性OLED技术领域，尤其涉及OLED显示面板及显示装置。
背景技术
随着技术的发展，OLED(Organic Light-Emitting Diode，有机发光二极管)因其色域高、功耗低等优点，目前已经占据手机的中高端市场。根据产品的特点，OLED可以分为刚性OLED和柔性OLED，因柔性OLED可以制作成曲面、折叠、卷曲的产品，因此柔性OLED被广泛研究。
柔性OLED产品根据触控面板的技术可以划分为三大类：外挂式、On-cell(FMLOC，Flexible Multi-Layer On Cell)、In-cell。外挂式工艺难度低，但FMLOC因其结构更薄、边框更窄、光学效果更好等优点，逐渐成为市场中高端AMOLED手机屏的主流。
在相关技术中，FMLOC存在的缺点有：1、信噪比低，由于触控电极直接蒸镀在OLED的封装层表面，缩短了触控电极和OLED之间的距离，OLED信号的串扰严重，影响了触控电极信号接收，致使触控面板接收的噪声影响明显增大，最终导致信噪比偏低；2、RC loading过大，由于缩短了触控电极和OLED之间的距离，因此OLED面板和触控面板之间形成的寄生电容偏大，从而使RC loading(电阻电容负载)过大，严重影响了触控面板的充电时间。对于大尺寸面板而言， 触控电极的阻抗会更高，FMLOC存在的两种缺点会更加影响触控性能。
公开内容
第一方面，本公开实施例提供一种OLED显示面板，包括OLED层和设置在所述OLED层上的触控面板层，所述触控面板层包括第一金属网格层，所述第一金属网格层的靠近所述OLED层的一侧设有绝缘层，所述绝缘层的靠近所述OLED层的一侧设有第二金属网格层和桥接金属层；
所述桥接金属层与所述第二金属网格层同层且绝缘设置，且所述桥接金属层通过贯穿所述绝缘层中的通孔连接至所述第一金属网格层。
在一些实施方式中，所述第一金属网格层、所述第二金属网格层、和所述桥接金属层均具有网格结构，且所述第一金属网格层、所述第二金属网格层、和所述桥接金属层的网格密度相同。
在一些实施方式中，所述第二金属网格层在所述OLED层上的正投影至少部分覆盖所述第一金属网格层在所述OLED层上的正投影。
在一些实施方式中，所述第二金属网格层和所述桥接金属层的材料相同。
在一些实施方式中，所述第一金属网格层包括多个驱动电极和多个感应电极，所述驱动电极和所述感应电极交叉且绝缘设置，在所述驱动电极和所述感应电极的交叉处，所述驱动电极和所述感应电极之一的子电极通过所述桥接金属层连接。
在一些实施方式中，所述驱动电极和所述感应电极内分别设有浮置电极，所述浮置电极与所述驱动电极和所述感应电极绝缘，且所述浮置电极与所述驱动电极和所述感应电极同层设置。
在一些实施方式中，所述触控面板层还包括有机层，所述有机层设置在所述第一金属网格层的远离所述OLED层的一侧。
在一些实施方式中，所述OLED层与所述第二金属网格层之间设有缓冲层。
在一些实施方式中，所述第二金属网格层配置为连接电平信号 供给端。
第二方面，本公开实施例提供一种显示装置，包括上述的OLED显示面板。
第三方面，本公开实施例提供一种OLED显示面板的制备方法，包括：
形成OLED层；
在OLED层的一侧形成第二金属网格层和桥接金属层，使得所述第二金属网格层和所述桥接金属层同层且绝缘；
在所述第二金属网格层和所述桥接金属层的远离所述OLED层的一侧形成绝缘层；以及
在所述绝缘层的远离所述OLED层的一侧形成第一金属网格层，所述桥接金属层通过贯穿所述绝缘层中的通孔连接至所述第一金属网格层。
在一些实施方式中，所述第一金属网格层、所述第二金属网格层和所述桥接金属层均形成为网格密度相同的网格结构。
在一些实施方式中，所述第二金属网格层和所述第一金属网格层形成为使得所述第二金属网格层在所述OLED层上的正投影至少部分覆盖所述第一金属网格层在所述OLED层上的正投影。
在一些实施方式中，采用相同材料、通过同一构图工艺形成所述第二金属网格层和所述桥接金属层。
在一些实施方式中，所述第一金属网格层形成为包括多个驱动电极和多个感应电极，所述驱动电极和所述感应电极交叉且绝缘设置，在所述驱动电极和所述感应电极的交叉处，所述驱动电极和所述感应电极之一的子电极形成为通过所述桥接金属层连接。
在一些实施方式中，所述第一金属网格层包括多个驱动电极和多个感应电极，所述方法还包括：
与所述第一金属网格层同层形成浮置电极，所述浮置电极与所述驱动电极和所述感应电极绝缘。
在一些实施方式中，所述OLED显示面板的制备方法还包括：
在所述第一金属网格层的远离所述OLED的一侧形成有机层。
在一些实施方式中，所述OLED显示面板的制备方法还包括：
在所述OLED层与所述第二金属网格层之间形成缓冲层。
在一些实施方式中，所述第二金属网格层形成为可连接电平信号供给端。
附图说明
通过阅读参照以下附图所作的对非限制性实施例所作的详细描述，本申请的特征、目的和优点将会变得更明显，附图中：
图1为本公开实施例的OLED显示面板的剖面结构示意图；
图2为本公开实施例的OLED显示面板的第二金属网格层的示意图；
图3示出了第一金属网格层与第二金属网格层的关系示意图；以及
图4示出了本公开实施例的OLED显示面板的制备方法的流程图。
具体实施方式
下面结合附图和实施例对本公开作进一步的详细说明。可以理解的是，此处所描述的具体实施例仅仅用于解释相关公开，而非对该公开的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与公开相关的部分。
需要说明的是，在不冲突的情况下，本公开各实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本公开。
除非另外定义，本公开实施例使用的技术术语或者科学术语应当为本公开实施例所属领域内具有一般技能的人士所理解的通常意义。本公开实施例中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”、“一”或者“该”等类似词语也不表示数量限制，而是表示存在至少一个。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物 件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。
请参考图1，本公开实施例提供一种OLED显示面板，包括OLED层1和设置在OLED层1上的触控面板层，所述触控面板层包括有机层7，有机层7的靠近OLED层1的一侧设有第一金属网格层6。
所述第一金属网格层6的靠近所述OLED层1的一侧设有绝缘层5，所述绝缘层5的靠近所述OLED层1的一侧设有第二金属网格层3，所述OLED层1与所述第二金属网格层3之间设有缓冲层2。
所述第二金属网格层3可连接至触控芯片。
本实施例中，在绝缘层5和缓冲层2之间增加设置第二金属网格层3，该第二金属网格层3可通过外围引线连接至触控芯片，通过该第二金属网格层3对显示面板的杂讯进行屏蔽，进一步的降低了触控面板层的负载(Loading)，从而降低了显示面板的噪声，提升了触控的信噪比，同时可通过触控芯片向第二金属网格层3发送电平信号，使得该第二金属网格层3不受OLED层1的电干扰，实现对显示面板的噪声的屏蔽。
第一金属网格层6和第二金属网格层3可均具有网格结构。
此外，事实上，所述第二金属网格层3连接电平信号供给端即可。
在一些实施方式中，所述第二金属网格层3在OLED层1上的正投影至少部分覆盖所述第一金属网格层6在OLED层1上的正投影。
本实施例中，通过设置第二金属网格3实现对显示面板的杂讯的屏蔽，该第二金属网格3设置在第一金属网格层6和OLED层1之间，才可实现其作用。另外，第一金属网格层6的部分网格对应的位置设有各个子像素，为了保证第二金属网格层3的设置效果，同时又不会对各个子像素产生影响，因此将第二金属网格层3设置为使得第二金属网格层3在OLED层1上的正投影至少部分覆盖第一金属网格层6在OLED层1上的正投影，能够保证第二金属网格层3对显示面板的噪声的屏蔽。
在一些实施方式中，所述第二金属网格层3的网格密度与所述第一金属网格层6的网格密度相同。如图2所示，给出了第二金属网格层3的结构示意图，即，第二金属网格层3具有网格结构，本实施例中，将第二金属网格层3的网格密度设置的与第一金属网格层6的网格密度相同，能够避免产生光学摩尔纹，避免对显示面板的显示性能产生影响，同时相同网格密度的两个网格层可以采用相同的掩膜板进行制备，便于该第二金属网格层3的制备，同时工艺不会过于复杂。
在一些实施方式中，所述第二金属网格层3包括多条相互交错的金属线。
本实施例中提供的第二金属网格层3为相互连接的金属线，各金属线相互连接，并最终可与触控芯片相连，对显示面板的杂讯进行屏蔽。
在一些实施方式中，所述绝缘层5上设有通孔，所述绝缘层5的靠近所述OLED层1的一侧设有桥接金属层4，所述桥接金属层4通过所述通孔与所述第一金属网格层6相连。
本实施例提供的OLED显示面板中，在绝缘层5上设置通孔，绝缘层5与缓冲层2之间设置桥接金属层4，该桥接金属层4与第一金属网格层6相连。
在一些实施方式中，如图1所示，所述桥接金属层4和所述第二金属网格层3同层设置，且所述桥接金属层4也具有网格结构。所述桥接金属层4的网格密度可与所述第一金属网格层6和所述第二金属网格层3的网格密度相同。
本实施例中，将第二金属网格层3与桥接金属层4设置在同一层，一方面，制备桥接金属层4时所形成的结构足够第二金属网格层3的制备，能够同时对第二金属网格层3和桥接金属层4进行制备，桥接金属层4和第二金属网格层3同时制备时，工艺步骤不会变复杂，另一方面，第二金属网格层3与桥接金属层4设置在同一层，对整个显示面板的结构不会造成过多的改变，显示面板的厚度等不产生显著改变。
在一些是实施方式中，所述第二金属网格层3与所述桥接金属层4绝缘设置。
本实施例中的桥接金属层4连接至第一金属网格层6，第二金属网格层3的设计是用来屏蔽显示面板的杂讯的，其可连接至驱动芯片(例如触控芯片)，因此将第二金属网格层3和桥接金属层4之间进行绝缘设置，两者相互不接触即可。
在一些实施方式中，所述第一金属网格层6具有沿第一方向(例如，显示面板的竖直方向)平行设置的多个驱动电极和沿第二方向(例如，显示面板的水平方向)平行设置的多个感应电极，所述驱动电极和所述感应电极交叉设置，且在所述驱动电极与所述感应电极的交叉处，所述驱动电极与所述感应电极绝缘设置，所述驱动电极或者所述感应电极的子电极可通过所述桥接金属层4桥接。
本实施例中，如图1所示，以所述第一金属网格层6具有多个感应电极61和多个驱动电极62、所述驱动电极62的子电极通过所述桥接金属层4连接为例进行说明，但是本公开不限于此。事实上，感应电极61和驱动电极62可互换。
在一些实施方式中，为了减少驱动电极的负载(Loading)，可采用双边驱动的方式对驱动电极进行驱动。例如，可从每个驱动电极的两端输入驱动信号进行驱动。
在一些实施方式中，所述第一金属网格层6具有多个驱动电极和多个感应电极，每一所述驱动电极和每一所述感应电极内分别设有相互间隔的多个浮置电极(dummy)，所述浮置电极与所述驱动电极和所述感应电极绝缘，所述浮置电极与所述驱动电极和所述感应电极同层设置。
如图1所示，本实施例中的OLED显示面板包括OLED层1和设置在OLED层1上的触控面板层，该触控面板层包括缓冲层2，缓冲层2设置在OLED层1上，缓冲层2的材料可采用TFE(四氟乙烯)材料进行制备，随后在缓冲层2上制备第二金属网格层3和桥接金属层4，第二金属网格层3和桥接金属层4同层设置，可以同时进行制备，第二金属网格层3和桥接金属层4之间绝缘，例如，第二金属网 格层3和桥接金属层4之间也可以设置浮置电极，该浮置电极是指没有电信号的金属层结构，与第二金属网格层3和桥接金属层4绝缘；随后在第二金属网格层3和桥接金属层4上设置绝缘层5，绝缘层5上设置第一金属网格层6，绝缘层开孔，用来连接桥接金属层4和第一金属网格层6，该第一金属网格层6包括多个驱动电极Tx和多个感应电极Rx，驱动电极和感应电极之间绝缘设置，且驱动电极和感应电极之间可设置浮置电极，该浮置电极与驱动电极和感应电极之间不接触，为没有电信号的区域，该方式的设置使得每层金属网格层(第一金属网格层6和第二金属网格层3)的制备更加简单方便，最后在第一金属网格层6上设置有机层7。
本实施例中，在桥接金属层4所在层增加设置第二金属网格层3，第二金属网格层3可通过外围电路连接至触控芯片上，通过该第二金属网格层3屏蔽显示面板的杂讯，降低触控层的负载(Loading)，从而降低显示面板的噪声，提升触控的信噪比；在一些实施方式中，将第二金属网格层3和第一金属网格层6的分布密度保持一致，避免产生光学摩尔纹，保证显示面板的显示性能。
图3示出了第一金属网格层及第二金属网格层的关系示意图。
以第一金属网格层6包括多个感应电极61和多个驱动电极62、所述驱动电极62的子电极通过所述桥接金属层4连接为例，如图3的左侧部分所示，所述感应电极61沿第一方向平行设置，所述驱动电极62沿第二方向平行设置，所述感应电极61和所述驱动电极62交叉设置。
如图3的右侧部分示出了所述感应电极61和所述驱动电极62的交叉处的放大示意图，如图3的右侧部分所示，所述感应电极61和所述驱动电极62均具有网格结构，所述感应电极61可同层设置和连接，在所述感应电极61与所述驱动电极62的交叉处，所述驱动电极62的子电极通过所述桥接金属层4连接，所述第二金属网格层3与所述桥接金属层4同层且绝缘设置，所述桥接金属层4也具有网格结构，但其在该图示中被遮挡。
本公开实施例还一种显示装置，包括上述OLED显示面板。
应当理解，所述显示装置还可以包括其他必要部件，例如电源等。
所述显示装置可以为电子纸、液晶显示面板、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等具有显示功能的任何产品或部件。
本公开实施例还提供一种OLED显示面板的制备方法，如图4所示，包括步骤：
S101，形成OLED层；
S102，在OLED层的一侧形成第二金属网格层和桥接金属层，使得所述第二金属网格层和所述桥接金属层同层且绝缘；
S103，在所述第二金属网格层和所述桥接金属层的远离所述OLED层的一侧形成绝缘层；以及
S104，在所述绝缘层的远离所述OLED层的一侧形成第一金属网格层，所述桥接金属层通过贯穿所述绝缘层中的通孔连接至所述第一金属网格层。
通过形成所述第二金属网格层，可对显示面板的杂讯进行屏蔽，降低了触控面板的负载，进而降低了显示面板的噪声，提升了触控的信噪比。
所述第一金属网格层、所述第二金属网格层和所述桥接金属层可均形成为网格密度相同的网格结构，能够避免产生光学摩尔纹，避免对显示面板的显示性能产生影响，同时，相同网格密度的网格层可采用相同的掩模板进行制备，便于制备，且工艺不会过于复杂。
为了保证所述第二金属网格层的设置效果，所述第二金属网格层和所述第一金属网格层可形成为使得所述第二金属网格层在所述OLED层上的正投影至少部分覆盖所述第一金属网格层在所述OLED层上的正投影，能够保证所述第二金属网格层对显示面板的噪声的屏蔽。
由于所述第二金属网格层和所述桥接金属层同层、且可均形成为网格密度相同的网格结构，可采用相同材料、通过同一构图工艺(例如曝光、刻蚀、显影等)同时形成所述第二金属网格层和所述桥接金属层，工艺步骤不会变复杂，且不会对制备的显示面板的结构造成过 多的改变，显示面板的厚度等不产生显著改变。
具体地，所述第一金属网格层可形成为包括沿第一方向(例如，显示面板的竖直方向)平行排布的多个驱动电极和沿第二方向(例如，显示面板的水平方向)平行排布的多个感应电极，所述驱动电极和所述感应电极交叉且绝缘设置，在所述驱动电极和所述感应电极的交叉处，所述驱动电极和所述感应电极之一的子电极形成为通过所述桥接金属层连接。
例如，所述感应电极可同层形成和连接，在所述驱动电极和所述感应电极的交叉处，所述驱动电极的子电极可通过所述桥接金属层连接，但是，本公开不限于此，事实上，也可以是，所述驱动电极同层形成和连接，所述感应电极的子电极通过所述桥接金属层连接，本领域技术人员可根据需要进行选择。
在一些实施方式中，所述OLED显示面板的制备方法还可包括：
与所述第一金属网格层同层形成浮置电极，所述浮置电极与所述驱动电极和所述感应电极绝缘。
具体地，所述浮置电极为没有电信号的金属层结构
在一些实施方式中，所述OLED显示面板的制备方法还可包括：
在所述第一金属网格层的远离所述OLED的一侧形成有机层。
例如，所述有机层可以为保护层。
在一些实施方式中，所述OLED显示面板的制备方法还可包括：
在所述OLED层与所述第二金属网格层之间形成缓冲层。
此外，所述第二金属网格层可形成为连接电平信号供给端，例如，可连接触控芯片，可通过触控芯片向所述第二金属网格层发送电平信号，使得该所述第二金属网格层不受OLED层的电干扰，从而实现对显示面板的噪声的屏蔽。
以上描述仅为本申请的示例实施例以及对所运用技术原理的说明。本领域技术人员应当理解，本申请中所涉及的公开范围并不限于上述技术特征的特定组合而成的技术方案，同时也应涵盖在不脱离所述公开构思的情况下，由上述技术特征或其等同特征进行任意组合而形成的其它技术方案，例如，本申请中公开的技术特征通过具有类似 功能的技术特征进行替换而形成的技术方案。

Claims (19)

  1. 一种OLED显示面板，包括OLED层和设置在所述OLED层上的触控面板层，所述触控面板层包括第一金属网格层，
    所述第一金属网格层的靠近所述OLED层的一侧设有绝缘层，所述绝缘层的靠近所述OLED层的一侧设有第二金属网格层和桥接金属层；
    所述桥接金属层与所述第二金属网格层同层且绝缘设置，且所述桥接金属层通过贯穿所述绝缘层中的通孔连接至所述第一金属网格层。
  2. 根据权利要求1所述的OLED显示面板，其中，所述第一金属网格层、所述第二金属网格层、和所述桥接金属层均具有网格结构，且所述第一金属网格层、所述第二金属网格层、和所述桥接金属层的网格密度相同。
  3. 根据权利要求1所述的OLED显示面板，其中，所述第二金属网格层在所述OLED层上的正投影至少部分覆盖所述第一金属网格层在所述OLED层上的正投影。
  4. 根据权利要求1所述的OLED显示面板，其中，所述第二金属网格层和所述桥接金属层的材料相同。
  5. 根据权利要求1所述的OLED显示面板，其中，所述第一金属网格层包括多个驱动电极和多个感应电极，所述驱动电极和所述感应电极交叉且绝缘设置，在所述驱动电极和所述感应电极的交叉处，所述驱动电极和所述感应电极之一的子电极通过所述桥接金属层连接。
  6. 根据权利要求1所述的OLED显示面板，其中，所述驱动电 极和所述感应电极内分别设有浮置电极，所述浮置电极与所述驱动电极和所述感应电极绝缘，且所述浮置电极与所述驱动电极和所述感应电极同层设置。
  7. 根据权利要求1所述的OLED显示面板，其中，所述触控面板层还包括有机层，所述有机层设置在所述第一金属网格层的远离所述OLED层的一侧。
  8. 根据权利要求1所述的OLED显示面板，其中，所述OLED层与所述第二金属网格层之间设有缓冲层。
  9. 根据权利要求1所述的OLED显示面板，其中，所述第二金属网格层配置为连接电平信号供给端。
  10. 一种显示装置，其特征在于，包括权利要求1至9中任一项所述的OLED显示面板。
  11. 一种OLED显示面板的制备方法，包括：
    形成OLED层；
    在OLED层的一侧形成第二金属网格层和桥接金属层，使得所述第二金属网格层和所述桥接金属层同层且绝缘；
    在所述第二金属网格层和所述桥接金属层的远离所述OLED层的一侧形成绝缘层；以及
    在所述绝缘层的远离所述OLED层的一侧形成第一金属网格层，所述桥接金属层通过贯穿所述绝缘层中的通孔连接至所述第一金属网格层。
  12. 根据权利要求11所述的方法，其中，所述第一金属网格层、所述第二金属网格层和所述桥接金属层均形成为网格密度相同的网格结构。
  13. 根据权利要求11所述的方法，其中，所述第二金属网格层和所述第一金属网格层形成为使得所述第二金属网格层在所述OLED层上的正投影至少部分覆盖所述第一金属网格层在所述OLED层上的正投影。
  14. 根据权利要求10所述的方法，其中，采用相同材料、通过同一构图工艺形成所述第二金属网格层和所述桥接金属层。
  15. 根据权利要求10所述的方法，其中，所述第一金属网格层形成为包括多个驱动电极和多个感应电极，所述驱动电极和所述感应电极交叉且绝缘设置，在所述驱动电极和所述感应电极的交叉处，所述驱动电极和所述感应电极之一的子电极形成为通过所述桥接金属层连接。
  16. 根据权利要求10所述的方法，其中，所述第一金属网格层包括多个驱动电极和多个感应电极，所述方法还包括：
    与所述第一金属网格层同层形成浮置电极，所述浮置电极与所述驱动电极和所述感应电极绝缘。
  17. 根据权利要求10所述的方法，还包括：
    在所述第一金属网格层的远离所述OLED的一侧形成有机层。
  18. 根据权利要求10所述的方法，还包括：
    在所述OLED层与所述第二金属网格层之间形成缓冲层。
  19. 根据权利要求11所述的方法，其中，所述第二金属网格层形成为可连接电平信号供给端。
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