WO2020029372A1 - 一种触摸屏及oled显示面板 - Google Patents

一种触摸屏及oled显示面板 Download PDF

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WO2020029372A1
WO2020029372A1 PCT/CN2018/105637 CN2018105637W WO2020029372A1 WO 2020029372 A1 WO2020029372 A1 WO 2020029372A1 CN 2018105637 W CN2018105637 W CN 2018105637W WO 2020029372 A1 WO2020029372 A1 WO 2020029372A1
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Prior art keywords
electrode
metal
grid
touch
adjacent
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English (en)
French (fr)
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李波
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to US16/230,855 priority Critical patent/US10698547B2/en
Publication of WO2020029372A1 publication Critical patent/WO2020029372A1/zh
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    • GPHYSICS
    • G06COMPUTING OR CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412Digitisers structurally integrated in a display
    • GPHYSICS
    • G06COMPUTING OR CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • GPHYSICS
    • G06COMPUTING OR CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111Cross 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
    • GPHYSICS
    • G06COMPUTING OR CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112Electrode 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 invention relates to the field of display, in particular to a metal grid touch screen and an OLED display panel.
  • the touch technologies that cooperate with AMOLED display mainly include the external touch film (Film) bonding scheme and the glass-encapsulated rigid On-Cell technology (referring to the touch screen embedded between the color filter substrate and the polarizer of the display screen) ), Whether it is external film bonding or glass On-Cell touch technology, there is a problem that increasing the thickness of the product affects the design of the narrow side.
  • FIG. 1 a schematic structural diagram of an existing OLED display panel using an external touch film bonding scheme is shown, which includes, from bottom to top, a substrate 1 ′, an OLED layer 2 ′, and an encapsulation layer 3 in this order. ', The first transparent optical adhesive layer 4', the touch film layer 5 ', the polarizer 6', the second transparent optical adhesive layer 7 ', and the cover glass layer 8'. Among them, the touch film and the OLED layer are bonded by transparent optical glue, and the polarizer and the cover glass need to be bonded by transparent optical glue. Since the number of bonding is twice, the bonding tolerance is generally 0.1 mm. Above, so the external touch film bonding solution will increase the thickness of the product and is not conducive to the design of narrow bezel products.
  • FIG. 2 a schematic structural diagram of an existing OLED display panel using glass-encapsulated On-Cell touch technology is shown.
  • it includes: substrate 10 ', OLED layer 20', packaging glass layer 30 ', touch circuit layer 40', polarizer 50 ', transparent optical adhesive layer 60', and cover glass layer 70 in order from bottom to top. '.
  • the technical problem to be solved by the present invention is to provide a touch screen and an OLED display panel, which can realize a flexible touch screen, reduce the thickness of the OLED display panel, and improve the touch effect.
  • an aspect of an embodiment of the present invention provides a touch screen, which includes:
  • each of the second touch electrode strings includes a plurality of second grid electrodes, and Adjacent second grid electrodes are electrically connected through metal bridges; each said second grid electrode includes a plurality of spaced apart and connected second metal grid bars, and two adjacent second metal grid bars A second floating electrode is provided in between;
  • An insulating layer is provided between the metal bridge and the first grid electrode and the second grid electrode, so as to insulate the plurality of first touch electrode strings and the plurality of second touch electrode strings.
  • adjacent sides of the first grid electrode and its adjacent second grid electrode are staggered, and between adjacent first metal grid bars and second metal grid bars, adjacent first Between a metal grid bar and the first floating electrode, and adjacent second metal grid bars and the second floating electrode are micro-disconnected to achieve electrical separation from each other.
  • the two ends of the metal bridge communicate with two adjacent second grid electrodes through a through hole provided on the insulation layer.
  • the metal bridge further communicates the second grid electrode with the second grid electrode among the first grid electrode through a through hole provided on the insulating layer.
  • the sides where the first touch electrode string and the second touch electrode string are alternately arranged have a pulsed edge or a zigzag edge.
  • first metal grid bar and the second metal grid bar are made of titanium-aluminum-titanium three-layer composite metal
  • the metal bridge is made of titanium-aluminum-titanium or molybdenum-aluminum-molybdenum three-layer composite metal.
  • the metal bridge is a metal grid bridge
  • the metal bridge includes at least one third metal wire electrically connected
  • the third metal wire is generally linear, X-shaped, or double X-shaped.
  • the first touch electrode string is one of a driving electrode and a sensing electrode
  • the second touch electrode string is the other of a driving electrode and a sensing electrode
  • the width of the metal lines in the first metal grid bar, the second metal grid bar, and the metal bridge is within a range of 0.5 to 5 ⁇ m.
  • the diameter of the through hole does not exceed the distance between adjacent pixel points.
  • the distance of the minute break is in a range of 3 to 20 ⁇ m.
  • an OLED display panel which includes: a base substrate, an OLED layer provided on the base substrate, and a packaging layer provided above the OLED layer; further including:
  • a base layer disposed on the packaging layer
  • a touch screen provided on the base layer
  • a protective layer disposed on the touch screen
  • the touch screen includes:
  • each of the second touch electrode strings includes a plurality of second grid electrodes, and Adjacent second grid electrodes are electrically connected through metal bridges; each said second grid electrode includes a plurality of spaced apart and connected second metal grid bars, and two adjacent second metal grid bars A second floating electrode is provided in between;
  • An insulating layer is provided between the metal bridge and the first grid electrode and the second grid electrode, so as to insulate the plurality of first touch electrode strings and the plurality of second touch electrode strings.
  • adjacent sides of the first grid electrode and its adjacent second grid electrode are staggered, and between adjacent first metal grid bars and second metal grid bars, adjacent first Between a metal grid bar and the first floating electrode, and adjacent second metal grid bars and the second floating electrode are micro-disconnected to achieve electrical separation from each other.
  • the two ends of the metal bridge communicate with two adjacent second grid electrodes through a through hole provided on the insulation layer.
  • the metal bridge further communicates the second grid electrode with the second grid electrode among the first grid electrode through a through hole provided on the insulating layer.
  • the sides where the first touch electrode string and the second touch electrode string are alternately arranged have a pulsed edge or a zigzag edge.
  • the first metal grid bar and the second metal grid bar use a titanium-aluminum-titanium three-layer composite metal
  • the metal bridge uses a titanium-aluminum-titanium or molybdenum-aluminum-molybdenum three-layer composite metal.
  • the metal bridge is a metal grid bridge
  • the metal bridge includes at least one third metal wire electrically connected
  • the third metal wire is generally linear, X-shaped, or double X-shaped.
  • the first touch electrode string is one of a driving electrode and a sensing electrode
  • the second touch electrode string is the other of a driving electrode and a sensing electrode
  • the width of the metal lines in the first metal grid bar, the second metal grid bar, and the metal bridge is within a range of 0.5 to 5 ⁇ m.
  • the diameter of the through hole does not exceed the distance between adjacent pixel points.
  • the distance of the minute break is in a range of 3 to 20 ⁇ m.
  • the touch screen and OLED display panel provided by the present invention can realize an On-Cell touch scheme for flexible display touch by making a metal grid touch sensing circuit on a thin film encapsulation layer of a flexible OLED display screen;
  • the metal grid is used as the touch sensing circuit, the product has good resistance to bending, and the metal grid line is routed between adjacent pixels, which can minimize the optical impact of the touch sensor on the OLED;
  • both the first touch electrode and the second touch electrode adopt a structure of a metal grid bar and a floating electrode, and at the same time, the second touch electrode is connected to the most edge floating electrode of the first touch electrode through a metal bridge.
  • FIG. 1 is a schematic structural diagram of an OLED display panel using an external touch film bonding scheme in the prior art
  • FIG. 2 is a schematic structural diagram of an OLED display panel using glass-encapsulated On-Cell touch technology in the prior art
  • FIG. 3 is a schematic structural diagram of an embodiment of a touch screen provided by the present invention.
  • FIG. 4 is a more detailed structural diagram of an embodiment where the first touch electrode string and the second touch electrode string cross in FIG. 3;
  • FIG. 5 is a more detailed structure diagram of the adjacent region of the first touch electrode string and the second touch electrode string in FIG. 4.
  • FIG. 6 is a more detailed structural diagram of another embodiment where the first touch electrode string and the second touch electrode string cross in FIG. 3;
  • FIG. 7 is an enlarged schematic view of part A in FIG. 6;
  • FIG. 8 is a schematic structural diagram of an embodiment of the metal grid bridge in FIG. 3;
  • FIG. 9 is a schematic structural diagram of an embodiment of an OLED display panel provided by the present invention.
  • the touch screen 1 includes:
  • the plurality of first metal electrodes 111 The grid bar 110 forms a tree-like structure, that is, a plurality of branches are extended in the trunk, and a first floating electrode 113 is provided between two adjacent first metal grid bars 110.
  • the first metal line 1100 in 110 runs along the middle of adjacent pixel points 7 to avoid the light-emitting area of pixel points 7;
  • the metal bridges 13 may be metal grid bridges;
  • a second grid electrode 121 includes a plurality of spaced apart and connected second metal grid bars 120, and a second floating electrode 123 is provided between two adjacent second metal grid bars 120; the second metal The second metal line 1200 in the grid bar 120 runs along the middle of the adjacent pixel point 7.
  • the viewing angle is the bottom view of the metal grid touch screen, so the metal bridge 13 is located at the uppermost layer. ; Similar perspectives from Figures 4 to 7 later; and
  • An insulating layer disposed between the metal bridge 13 and the first grid electrode 111 and the second grid electrode 121 to insulate the plurality of first touch electrode strings 11 and the plurality of second touch electrode strings 12 ;
  • Adjacent edges of each first grid electrode 111 and its adjacent second grid electrode 121 are staggered. Between the adjacent first metal grid bars 110 and the second metal grid bars 120, Between the adjacent first metal grid bars 110 and the first floating electrode 113, and the adjacent second metal grid bars 120 and the second floating electrode 123, a slight disconnection 16 is performed between each other to achieve mutual Electrical separation between the two, specifically the electrical separation between the first touch electrode string 11 and the second touch electrode string 12, the electrical separation between the first metal grid bar 110 and the first floating electrode 113, and the second The electrical separation between the metal grid bar 120 and the second floating electrode 123; in some embodiments, the distance of the minute break 16 is in a range of 3-20 ⁇ m.
  • the two ends of the metal bridge 13 are electrically connected to the second metal grid strips 120 of the two adjacent second grid electrodes 121 through through holes provided in the insulation layer, respectively.
  • the diameter of the through hole does not exceed the distance between adjacent pixels.
  • the diameter of the through hole is less than 15 ⁇ .
  • each first touch electrode string 11 and each second touch electrode string 12 are connected with a trace 17 extending to the binding area 18 of the touch screen; it can be understood that the first touch shown in FIG. 3
  • the number of the electrode strings 11 and the second touch electrode strings 12 is merely an example, and is not a limitation.
  • each first touch electrode string 11 and the second touch electrode string 12 are staggered with each other has a jagged edge; it can be understood that in other embodiments, other different Staggered, for example, pulsed edges.
  • the contact area between the first grid electrode 111 and the second grid electrode 121 can be increased, and the mutual capacitance signal can be enhanced.
  • the first floating electrode 113 and the second floating electrode 123 are respectively provided in the first grid electrode 111 and the second grid electrode 121, which can effectively control the size of the capacitance value and shield other noise capacitance signals. ;
  • the shape difference of the grids in the first metal grid bar 110 and the second metal grid bar 120 shown in FIG. 4 is only for easy differentiation, but not limitation. In actual products, the two can use the same net.
  • the grid shape see the example in Figure 5 for details.
  • the metal bridge 13 is a metal grid bridge, and the metal bridge includes at least one third metal wire 130 electrically connected to the third metal network.
  • a connection portion is formed on the line 130. Specifically, they may have different shapes.
  • the metal bridge as shown in FIG. 8 is a linear (bar-shaped) metal grid bridge formed by a plurality of (such as three) third metal lines 130, and the black dot 131 is through the via hole and the second touch
  • the connection part for the electrical connection of the electrode string 12 is generally provided to be thicker than the adjacent metal wire in order to improve the connection effect. It can be understood that by using a plurality of third metal wires 130, the metal can be effectively reduced.
  • an X-shaped or double X-shaped metal grid bridge may be formed as a whole by a plurality of third metal lines 130.
  • the metal bridge 13 adjacent to the second grid electrode 121 is not limited to one. In other embodiments, other shapes or numbers of metal bridges 13 may be used. For example, two or more metal bridges 13 may be used, as shown in FIG. 4. ⁇ Two metal bridges 13. At the same time, the third metal line 130 is routed along the middle of adjacent pixel points 7.
  • the first touch electrode string 11 is one of a driving electrode and a sensing electrode
  • the second touch electrode string 12 is another of a driving electrode and a sensing electrode.
  • the driving electrode is used to input a driving signal
  • the sensing electrode is used to receive a detection signal.
  • the mutual capacitance change at the intersection of two conductive lines or the self-capacitance change of each conductive line is detected, that is, self-capacitance or mutual capacitance is adopted. Way to get the location of the touch point. If a coordinate system is established with the first direction X and the second direction Y, the obtained touch point position can be represented by the coordinate system.
  • the first direction X and the second direction Y are generally defined as perpendicular to each other. This makes capacitance detection easier and coordinate positioning easier.
  • the first direction X and the second direction Y may also be set to cross non-vertically.
  • the first metal grid bar 110 and the second metal grid bar 120 are made of a titanium-aluminum-titanium three-layer composite metal
  • the metal bridge 13 is made of a titanium-aluminum-titanium or molybdenum-aluminum-molybdenum three-layer composite metal Using this three-layer structure can not only prevent metal oxidation, but also enhance the folding resistance of touch sensing circuits.
  • the width of the first metal line 1100 in the first metal grid bar 110, the second metal line 1200 in the second metal grid bar 120, and the third metal line 130 in the metal bridge 13 is 0.5. Within 5 ⁇ m.
  • FIG. 6 a more detailed structural schematic diagram of another embodiment at the intersection of the first touch electrode string and the second touch electrode string in FIG. 3 is shown, and the enlarged schematic view in FIG. 7 is combined together.
  • the metal bridge 13 is further close to the second grid in the first grid electrode 111 through the through hole provided on the insulation layer and in the first grid electrode 111.
  • the first floating electrode 113 of the grid electrode 121 is communicated.
  • the outermost floating electrode 113 in the first grid electrode 111 becomes a part of the second grid electrode 121, thereby increasing the contact area between the first grid electrode 111 and the second grid electrode 121. Enhance mutual capacitance signals, effectively reduce the influence of interference signals, and improve touch response sensitivity.
  • an OLED display panel is also provided. As shown in FIG. 9, the OLED display panel includes:
  • a base substrate 2 an OLED layer 3 provided on the base substrate 2, and an encapsulation layer 4 provided above the OLED layer 3;
  • a base layer 8 disposed on the encapsulation layer 4, and the base layer 8 may be selected from a silicon nitride material;
  • the aforementioned touch screen 1 provided on the base layer 8;
  • a protective layer 5 is disposed on the touch screen 1.
  • the touch screen 1 includes:
  • An insulating layer 14 is provided on the first metal layer; through holes 15 are formed on the first insulating layer at positions on both ends of the metal bridge 13;
  • a second metal layer is deposited on the insulating layer 14 and the encapsulation layer 4 and is etched to form a pattern to form the aforementioned plurality of first touch electrode strings 11 and second touch electrode strings 12 crossing each other, wherein the second touch Adjacent second grid electrodes 121 in the electrode string 12 are electrically connected to the metal bridge 13 through the through holes 15.
  • a metal grid touch sensing circuit on the encapsulation layer of the flexible OLED display, and making the metal grid circuit avoid the light emitting area of the pixel, it is in the middle of the adjacent pixel. At least one of the area wiring, the driving electrode or the sensing electrode is connected and conducted through a metal bridge (bridge metal) below, so that a flexible touch screen can be realized, and the thickness of the touch screen can be reduced by reducing the use of transparent optical glue.
  • the touch screen and OLED display panel provided by the present invention can realize an On-Cell touch scheme for flexible display touch by making a metal grid touch sensing circuit on a thin film encapsulation layer of a flexible OLED display screen;
  • the metal grid is used as the touch sensing circuit, the product has good resistance to bending, and the metal grid line is routed between adjacent pixels, which can minimize the optical impact of the touch sensor on the OLED;
  • both the first touch electrode and the second touch electrode adopt a structure of a metal grid bar and a floating electrode, and at the same time, the second touch electrode is connected to the most edge floating electrode of the first touch electrode through a metal bridge.

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Abstract

提供一种触摸屏(1)以及相应的OLED面板,通过在柔性OLED显示屏的封装层(4)上制作金属网格触控线路,并使金属网格触控线路避开像素点(7)的发光区,在相邻像素点(7)的中间区域走线,且驱动电极或感应电极至少其中一种电极通过下方金属桥(13)连接导通,并在驱动电极或感应电极中设置浮置电极(113/123),从而可以实现柔性触摸屏,并通过减少透明光学胶的使用,使其厚度变薄,降低生产成本,并提高触摸效果。

Description

一种触摸屏及OLED显示面板
本申请要求于2018年8月6日提交中国专利局、申请号为201810883764.8、发明名称为“一种触摸屏及OLED显示面板”的中国专利申请的优先权,上述专利的全部内容通过引用结合在本申请中。
技术领域
本发明涉及显示领域,特别涉及一种金属网格触摸屏及OLED显示面板。
背景技术
近年来,主动矩阵有机发光二极体显示屏(AMOLED)显示技术的快速发展,推动曲面和柔性显示触控产品迅速进入市场,各大面板厂商纷纷投资布局柔性显示触控项目。目前配合AMOLED显示屏的触控技术主要有外挂式触控薄膜(Film)贴合方案和玻璃封装的刚性On-Cell技术(指将触摸屏嵌入到显示屏的彩色滤光片基板和偏光片之间),无论是外挂薄膜贴合还是玻璃On-Cell触控技术,都存在增加产品厚度影响窄边设计的问题。
如图1所示,示出了现有的一种采用外挂式触控薄膜贴合方案的OLED显示面板的结构示意图,其从下至上依次包括:基板1’、OLED层2’、封装层3’、第一透明光学胶层4’、触控薄膜层5’、偏光片6’、第二透明光学胶层7’以及盖板玻璃层8’。其中,通过透明光学胶将触控薄膜和OLED层进行贴合,同时需要将偏光片与盖板玻璃通过透明光学胶进行贴合,由于贴合次数为两次,贴合公差一般都在0.1mm以上,所以外挂式触控薄膜贴合方案会增大产品厚度而且不利于窄边框产品设计。
如图2所示,示出了现有的一种采用玻璃封装On-Cell触控技术的OLED显示面板的结构示意图。在图中,其从下至上依次包括:基板10’、OLED层20’、封装玻璃层30’、触控线路层40’、偏光片50’、透明光学胶层60’以及盖板玻璃层70’。其是在显示屏的封装玻璃上制作触控感应线路,然后将封装玻璃的一面通过透明光学胶与OLED面板贴合到一起,不需要再单独 贴合外挂式触控薄膜,但是这种结构只适合制作刚性的AMOLED显示屏,而且产品整体厚度较厚,不适合当前产品轻薄化及柔性化的发展方向。
发明内容
本发明所要解决的技术问题在于,提供一种触摸屏及OLED显示面板,可以实现柔性触摸屏,并能减少OLED显示面板的厚度,以及提高触控效果。
为了解决上述技术问题,本发明的实施例的一方面提供一种触摸屏,其包括:
在第一方向上排列的多个第一触摸电极串,每一所述第一触摸电极串包括多个第一网格电极;每一所述第一网格电极至少包括多条间隔设置且连通的第一金属网格条,相邻两个第一金属网格条之间设置有第一浮置电极;
在第二方向上排列的与所述多个第一触摸电极串交叉的位于同层的多个第二触摸电极串,每个所述第二触摸电极串包括多个第二网格电极,相邻第二网格电极之间通过金属桥实现电连接;每一所述第二网格电极包括多条间隔设置且连通的第二金属网格条,相邻两个第二金属网格条之间设置有第二浮置电极;
绝缘层,其设置于金属桥与第一网格电极和第二网格电极之间,使所述多个第一触摸电极串和所述多个第二触摸电极串相绝缘。
其中,所述第一网格电极与其相邻的第二网格电极的相邻的边为交错设置,相邻的第一金属网格条与第二金属网格条之间,相邻的第一金属网格条与第一浮置电极之间,相邻的第二金属网格条与第二浮置电极之间均通过微小断开以实现相互之间的电学分离。
其中,所述金属桥两端通过设置于所述绝缘层上的通孔连通相邻的两个第二网格电极。
其中,所述金属桥进一步通过设置于所述绝缘层上的通孔连通第二网格电极和第一网格电极中靠近第二网格电极。
其中,所述第一触摸电极串与第二触摸电极串相互交错设置的边具有脉冲式边缘或锯齿形边缘。
其中,所述第一金属网格条以及第二金属网格条采用钛铝钛三层复合金 属,所述金属桥采用钛铝钛或者钼铝钼三层复合金属。
其中,所述金属桥为金属网格桥,所述金属桥包括至少一条电连接的第三金属线,第三金属线所述金属桥整体呈线型、X型或双X型。
其中,所述第一触摸电极串为驱动电极和感应电极中的一种,所述第二触摸电极串为驱动电极和感应电极中的另一种。
其中,所述第一金属网格条、第二金属网格条、金属桥中的金属线的宽度处于0.5~5μm范围以内。
其中,所述通孔的直径不超过相邻像素点的距离。
其中,所述微小断开的距离处于3~20μm范围内。
相应地,本发明的另一方面还提供一种OLED显示面板,其包括:衬底基板、设于衬底基板上的OLED层以及设于所述OLED层上方的封装层;其中,进一步包括:
设置于所述封装层上的基底层;
设置于所述基底层上的触摸屏;
设置于所述触摸屏上的保护层;
其中,所述触摸屏包括:
在第一方向上排列的多个第一触摸电极串,每一所述第一触摸电极串包括多个第一网格电极;每一所述第一网格电极至少包括多条间隔设置且连通的第一金属网格条,相邻两个第一金属网格条之间设置有第一浮置电极;
在第二方向上排列的与所述多个第一触摸电极串交叉的位于同层的多个第二触摸电极串,每个所述第二触摸电极串包括多个第二网格电极,相邻第二网格电极之间通过金属桥实现电连接;每一所述第二网格电极包括多条间隔设置且连通的第二金属网格条,相邻两个第二金属网格条之间设置有第二浮置电极;
绝缘层,其设置于金属桥与第一网格电极和第二网格电极之间,使所述多个第一触摸电极串和所述多个第二触摸电极串相绝缘。
其中,所述第一网格电极与其相邻的第二网格电极的相邻的边为交错设置,相邻的第一金属网格条与第二金属网格条之间,相邻的第一金属网格条与第一浮置电极之间,相邻的第二金属网格条与第二浮置电极之间均通过微 小断开以实现相互之间的电学分离。
其中,所述金属桥两端通过设置于所述绝缘层上的通孔连通相邻的两个第二网格电极。
其中,所述金属桥进一步通过设置于所述绝缘层上的通孔连通第二网格电极和第一网格电极中靠近第二网格电极。
其中,所述第一触摸电极串与第二触摸电极串相互交错设置的边具有脉冲式边缘或锯齿形边缘。
其中,所述第一金属网格条以及第二金属网格条采用钛铝钛三层复合金属,所述金属桥采用钛铝钛或者钼铝钼三层复合金属。
其中,所述金属桥为金属网格桥,所述金属桥包括至少一条电连接的第三金属线,第三金属线所述金属桥整体呈线型、X型或双X型。
其中,所述第一触摸电极串为驱动电极和感应电极中的一种,所述第二触摸电极串为驱动电极和感应电极中的另一种。
其中,所述第一金属网格条、第二金属网格条、金属桥中的金属线的宽度处于0.5~5μm范围以内。
其中,所述通孔的直径不超过相邻像素点的距离。
其中,所述微小断开的距离处于3~20μm范围内。
实施本发明实施例,具有如下有益效果:
本发明提供的触摸屏及OLED显示面板,通过在柔性OLED显示屏的薄膜封装层上制作金属网格触控感应线路,可以实现柔性显示触控的On-Cell触控方案;
而且,由于采用金属网格作为触控感应线路,使产品具有良好的耐弯折特性,且金属网格线在相邻像素点中间走线,可以最大限度减少触控传感器对OLED的光学影响;
同时,在第一触摸电极与第二触摸电极中均采用金属网格条以及浮置电极的结构,同时通过金属桥将第二触摸电极与第一触摸电极中的最边沿的浮置电极相连接,可以增大了第一触摸电极与第二触摸电极之间的接触面积,从而增强互电容信号,有效降低干扰信号的影响,提升触控反应灵敏度;
同时,由于有效减少了触摸屏的贴合次数,其可以在实现柔性显示触控 的同时,有效减薄产品厚度,同时也降低了产品生产成本。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术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,对于本领域普通技术人员来讲,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它的附图。
图1是现有技术中一种采用外挂式触控薄膜贴合方案的OLED显示面板的结构示意图;
图2是现有技术中一种采用玻璃封装On-Cell触控技术的OLED显示面板的结构示意图;
图3是本发明提供一种触摸屏的一个实施例的结构示意图;
图4是图3中第一触摸电极串与第二触摸电极串交叉处一个实施例的更细节的结构示意图;
图5是图4中第一触摸电极串与第二触摸电极串相邻区域的更细节的结构示意图。
图6是图3中第一触摸电极串与第二触摸电极串交叉处另一个实施例的更细节的结构示意图;
图7是图6中局部A的放大示意图;
图8是图3中金属网格桥的一个实施例的结构示意图;
图9是本发明提供的一种OLED显示面板的一个实施例的结构示意图。
具体实施方式
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的一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其它实施例,都属于本发明保护的范围。
在此,还需要说明的是,为了避免因不必要的细节而模糊了本发明,在 附图中仅仅示出了与根据本发明的方案密切相关的结构和/或处理步骤,而省略了与本发明关系不大的其他细节。
如图3所示,示出了本发明提供的一种触摸屏的一个实施例的结构示意图,一并结合图4至图5所示,在该实施例中,所述触摸屏1包括:
在第一方向(如x方向)上排列的多个第一触摸电极串11,所述多个第一触摸电极串中的每个第一触摸电极串11包括多个第一网格电极111,相邻第一网格电极111之间电连通;每一第一网格电极111至少包括多条间隔设置且连通的第一金属网格条110,在图3中,所述多条第一金属网格条110形成类似树状结构,即在主干中延伸出多个分支,相邻两个第一金属网格条110之间设置有第一浮置电极113,所述第一金属网格条110中的第一金属线1100沿相邻像素点7中间走线,避开像素点7的发光区;
在第二方向(如y方向)上排列的与所述多个第一触摸电极串11交叉的位于同层的多个第二触摸电极串12,每个所述第二触摸电极串12包括多个第二网格电极121,相邻第二网格电极121之间通过设置于下层的金属桥13实现电连接,在一个例子中,所述金属桥13可以是金属网格桥;所述每一第二网格电极121包括多条间隔设置且连通的第二金属网格条120,相邻两个第二金属网格条120之间设置有第二浮置电极123;所述第二金属网格条120中的第二金属线1200沿相邻像素点7中间走线,在图3中,为了方便观看,其视角为金属网格触摸屏的仰视视角,故所述金属桥13位于最上层;后面图4至图7的视角类似;以及
绝缘层,其设置于金属桥13与第一网格电极111和第二网格电极121之间,使所述多个第一触摸电极串11和所述多个第二触摸电极串12相绝缘;
所述每个第一网格电极111与其相邻的第二网格电极121的相邻的边为交错设置,相邻的第一金属网格条110与第二金属网格条120之间、相邻的第一金属网格条110与第一浮置电极113之间、相邻的第二金属网格条120与第二浮置电极123相互之间均通过微小断开16以实现相互之间的电学分离,具体地实现第一触摸电极串11和第二触摸电极串12之间的电学分离,第一金属网格条110与第一浮置电极113之间的电学分离,以及第二金属网格条120以及第二浮置电极123之间的电学分离;在一些实施例中,所述微 小断开16的距离处于3~20μm范围内。
其中,所述金属桥13两端通过设置于所述绝缘层上的通孔分别与相邻的两个第二网格电极121中的第二金属网格条120实现电连接。一般地,所述通孔的直径不超过相邻像素点之间的距离,例如在一些例子中,所述通孔的直径小于15μ。
其中,每个第一触摸电极串11和每个第二触摸电极串12均连接有走线17延伸至所述触摸屏的绑定区18;可以理解的是,图3中示出的第一触摸电极串11和第二触摸电极串12的数量仅为举例,非为限制。
如图4所示,所述每个第一触摸电极串11与第二触摸电极串12相互交错设置的边具有锯齿形边缘;可以理解的是,在其他的实施例中,可以采用其他不同的交错方式,例如,脉冲式边缘。采用这种交错方式,这样可以增大第一网格电极111与第二网格电极121之间的接触面积,增强互电容信号。可以理解的是,在第一网格电极111和第二网格电极121中分别设置第一浮置电极113和第二浮置电极123,可以有效控制电容值大小,并屏蔽其他杂讯电容信号;
同时,图4示出的第第一金属网格条110与第二金属网格条120中网格的形状区别仅为便于区分,而非限制,在实际产品中,两者可以采用相同的网格形状,具体可参见图5中的例子。
可以理解的是,在本发明的其他实施例中,其中,金属桥13为金属网格桥,在所述金属桥中包括至少一条电连接的第三金属线130,在所述第三金属网络线130上形成有连接部。具体地,也可以具有不同的形状。如图8中示出的金属桥为由多条(如三条)第三金属线130形成的整体呈线性(条形)的金属网格桥,其中黑色圆点131为通过过孔与第二触摸电极串12进行电连接的连接部,为了提高连接效果,所述连接部一般设置成较相邻的金属线更粗;可以理解的是,通过采用多条第三金属线130,可以有效降低金属网格桥的阻抗;在其他的实施例中,也可以由多条第三金属线130形成的整体呈X型、双X型的金属网格桥,同时,可以理解的是,用于连接相邻第二网格电极121的金属桥13不限于一条,在其他的实施例中,也可以采用其他形状或数量的金属桥13,例如也可以采用两条或多条,如图4中即采 用了两条金属桥13。同时,所述第三金属线130沿相邻像素点7中间走线。
其中,所述第一触摸电极串11为驱动电极和感应电极中的一种,所述第二触摸电极串12为驱动电极和感应电极中的另一种。其中驱动电极用于输入驱动信号,感应电极用于接收检测信号,在进行触摸检测时,检测两导电线路交汇处的互电容变化或每个导电线路的自电容变化,即采取自电容或互电容的方式得到触摸点的位置。若以第一方向X和第二方向Y建立坐标系,则所得到的触摸点位置则可通过该坐标系表示,按常规做法,一般将第一方向X和第二方向Y定义为相互垂直,以使得电容检测更容易,坐标定位也更方便。当触摸屏1为其他形态(圆形、不规则形状或弯曲形状)时,也可将第一方向X和第二方向Y设置为非垂直交叉的。
在更具体的例子中,所述第一金属网格条110以及第二金属网格条120采用钛铝钛三层复合金属,所述金属桥13采用钛铝钛或者钼铝钼三层复合金属,使用这种三层结构,既能防止金属氧化,又能增强触控感应线路的耐折性能。
在一个例子中,所述第一金属网格条110中的第一金属线1100、第二金属网格条120中的第二金属线1200以及金属桥13中第三金属线130的宽度处于0.5~5μm范围以内。
如图6所示,示出了图3中第一触摸电极串与第二触摸电极串交叉处另一个实施例的更细节的结构示意图,一并结合图7中的放大示意图。在该实施例中,其与图4示出的实施例的区别之处在于,所述金属桥13进一步通过设置于所述绝缘层上的通孔与第一网格电极111中靠近第二网格电极121的第一浮置电极113相连通。这样第一网格电极111中最外侧的浮置电极113就成为第二网格电极121的一部分,从而增大了第一网格电极111与第二网格电极121之间的接触面积,可以增强互电容信号,有效降低干扰信号的影响,提升触控反应灵敏度。
相应地,本发明的另一方面,还提供一种OLED显示面板,如图9所示,所述OLED显示面板包括:
衬底基板2、设于衬底基板2上的OLED层3、设于所述OLED层3上方的封装层4;以及
设置于所述封装层4上的基底层8,所述基底层8可以选择氮化硅材料;
设置于所述基底层8上的前述的触摸屏1;
设置于所述触摸屏1上的保护层5。
更具体地,所述触摸屏1包括:
第一金属层,所述第一金属层形成金属桥13;
在所述第一金属层上设置有绝缘层14;在所述第一绝缘层上位于所述金属桥13的两端的位置处形成有通孔15;
在所述绝缘层14及封装层4上沉积第二金属层,并进行蚀刻形成图形化,形成前述的多条相互交叉的第一触摸电极串11与第二触摸电极串12,其中第二触摸电极串12中的相邻第二网格电极121通过上述通孔15与所述金属桥13实现电连接。
所述触摸屏1的更多细节,可参照前述对图3至图8的描述,在此不进行赘述。
可以理解的是,在本发明中,通过在柔性OLED显示屏的封装层上制作金属网格触控感应线路,并使金属网格线路避开像素点的发光区,在相邻像素点的中间区域走线,驱动电极或感应电极至少其中一种电极通过下方金属桥(架桥金属)连接导通,从而可以实现柔性触摸屏,并通过减少透明光学胶的使用,使其厚度变薄膜。
实施本发明,具有如下有益效果:
本发明提供的触摸屏及OLED显示面板,通过在柔性OLED显示屏的薄膜封装层上制作金属网格触控感应线路,可以实现柔性显示触控的On-Cell触控方案;
而且,由于采用金属网格作为触控感应线路,使产品具有良好的耐弯折特性,且金属网格线在相邻像素点中间走线,可以最大限度减少触控传感器对OLED的光学影响;
同时,在第一触摸电极与第二触摸电极中均采用金属网格条以及浮置电极的结构,同时通过金属桥将第二触摸电极与第一触摸电极中的最边沿的浮置电极相连接,可以增大了第一触摸电极与第二触摸电极之间的接触面积,从而增强互电容信号,有效降低干扰信号的影响,提升触控反应灵敏度;
同时,由于有效减少了触摸屏的贴合次数,其可以在实现柔性显示触控的同时,有效减薄产品厚度,同时也降低了产品生产成本。
需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上所述仅是本申请的具体实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本申请原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本申请的保护范围。

Claims (20)

  1. 一种触摸屏,其中,包括:
    在第一方向上排列的多个第一触摸电极串,每一所述第一触摸电极串包括多个第一网格电极;每一所述第一网格电极至少包括多条间隔设置且连通的第一金属网格条,相邻两个第一金属网格条之间设置有第一浮置电极;
    在第二方向上排列的与所述多个第一触摸电极串交叉的位于同层的多个第二触摸电极串,每个所述第二触摸电极串包括多个第二网格电极,相邻第二网格电极之间通过金属桥实现电连接;每一所述第二网格电极包括多条间隔设置且连通的第二金属网格条,相邻两个第二金属网格条之间设置有第二浮置电极;
    绝缘层,其设置于金属桥与第一网格电极和第二网格电极之间,使所述多个第一触摸电极串和所述多个第二触摸电极串相绝缘。
  2. 如权利要求1所述的触摸屏,其中,所述第一网格电极与其相邻的第二网格电极的相邻的边为交错设置,相邻的第一金属网格条与第二金属网格条之间,相邻的第一金属网格条与第一浮置电极之间,相邻的第二金属网格条与第二浮置电极之间均通过微小断开以实现相互之间的电学分离。
  3. 如权利要求2所述的触摸屏,其中,所述金属桥两端通过设置于所述绝缘层上的通孔连通相邻的两个第二网格电极。
  4. 如权利要求3所述的触摸屏,其中,所述金属桥进一步通过设置于所述绝缘层上的通孔连通第二网格电极和第一网格电极中靠近第二网格电极的第一浮置电极。
  5. 如权利要求4所述的触摸屏,其中,所述第一触摸电极串与第二触摸电极串相互交错设置的边具有脉冲式边缘或锯齿形边缘。
  6. 如权利要求5所述的触摸屏,其中,所述第一金属网格条以及第二 金属网格条采用钛铝钛三层复合金属,所述金属桥采用钛铝钛或者钼铝钼三层复合金属。
  7. 如权利要求6所述的触摸屏,其中,所述金属桥为金属网格桥,所述金属桥包括至少一条电连接的第三金属线,第三金属线所述金属桥整体呈线型、X型或双X型。
  8. 如权利要求7所述的触摸屏,其中,所述第一触摸电极串为驱动电极和感应电极中的一种,所述第二触摸电极串为驱动电极和感应电极中的另一种。
  9. 如权利要求7所述的触摸屏,其中,所述第一金属网格条、第二金属网格条、金属桥中的金属线的宽度处于0.5~5μm范围以内。
  10. 如权利要求7所述的触摸屏,其中,所述通孔的直径不超过相邻像素点的距离;所述微小断开的距离处于3~20μm范围内。
  11. 一种OLED显示面板,其包括:衬底基板、设于衬底基板上的OLED层以及设于所述OLED层上方的封装层;其中,进一步包括:
    设置于所述封装层上的基底层;
    设置于所述基底层上的触摸屏;
    设置于所述触摸屏上的保护层;
    其中,所述触摸屏包括:
    在第一方向上排列的多个第一触摸电极串,每一所述第一触摸电极串包括多个第一网格电极;每一所述第一网格电极至少包括多条间隔设置且连通的第一金属网格条,相邻两个第一金属网格条之间设置有第一浮置电极;
    在第二方向上排列的与所述多个第一触摸电极串交叉的位于同层的多个第二触摸电极串,每个所述第二触摸电极串包括多个第二网格电极,相邻第二网格电极之间通过金属桥实现电连接;每一所述第二网格电极包括多条 间隔设置且连通的第二金属网格条,相邻两个第二金属网格条之间设置有第二浮置电极;
    绝缘层,其设置于金属桥与第一网格电极和第二网格电极之间,使所述多个第一触摸电极串和所述多个第二触摸电极串相绝缘。
  12. 如权利要求11所述的OLED显示面板,其中,所述第一网格电极与其相邻的第二网格电极的相邻的边为交错设置,相邻的第一金属网格条与第二金属网格条之间,相邻的第一金属网格条与第一浮置电极之间,相邻的第二金属网格条与第二浮置电极之间均通过微小断开以实现相互之间的电学分离。
  13. 如权利要求12所述的OLED显示面板,其中,所述金属桥两端通过设置于所述绝缘层上的通孔连通相邻的两个第二网格电极。
  14. 如权利要求13所述的OLED显示面板,其中,所述金属桥进一步通过设置于所述绝缘层上的通孔连通第二网格电极和第一网格电极中靠近第二网格电极的第一浮置电极。
  15. 如权利要求14所述的OLED显示面板,其中,所述第一触摸电极串与第二触摸电极串相互交错设置的边具有脉冲式边缘或锯齿形边缘。
  16. 如权利要求15所述的OLED显示面板,其中,所述第一金属网格条以及第二金属网格条采用钛铝钛三层复合金属,所述金属桥采用钛铝钛或者钼铝钼三层复合金属。
  17. 如权利要求16所述的OLED显示面板,其中,所述金属桥为金属网格桥,所述金属桥包括至少一条电连接的第三金属线,第三金属线所述金属桥整体呈线型、X型或双X型。
  18. 如权利要求17所述的OLED显示面板,其中,所述第一触摸电极串为驱动电极和感应电极中的一种,所述第二触摸电极串为驱动电极和感应电极中的另一种。
  19. 如权利要求17所述的OLED显示面板,其中,所述第一金属网格条、第二金属网格条、金属桥中的金属线的宽度处于0.5~5μm范围以内。
  20. 如权利要求17所述的OLED显示面板,其中,所述通孔的直径不超过相邻像素点的距离;所述微小断开的距离处于3~20μm范围内。
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