WO2013131361A1 - 单层式二维触摸传感器及触控终端 - Google Patents

单层式二维触摸传感器及触控终端 Download PDF

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Publication number
WO2013131361A1
WO2013131361A1 PCT/CN2012/081561 CN2012081561W WO2013131361A1 WO 2013131361 A1 WO2013131361 A1 WO 2013131361A1 CN 2012081561 W CN2012081561 W CN 2012081561W WO 2013131361 A1 WO2013131361 A1 WO 2013131361A1
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Prior art keywords
electrodes
touch sensor
layer
electrode
dimensional touch
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PCT/CN2012/081561
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English (en)
French (fr)
Inventor
邓耿淳
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深圳市汇顶科技有限公司
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Priority to US13/802,776 priority Critical patent/US9400299B2/en
Publication of WO2013131361A1 publication Critical patent/WO2013131361A1/zh

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    • 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
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2605—Measuring capacitance
    • 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
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
    • 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
    • G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Definitions

  • the present invention belongs to the field of touch technologies, and in particular, to a single-layer two-dimensional touch sensor and a touch terminal.
  • the sensor 100 includes a substrate 110 on which a plurality of row driving electrode units 120 and a plurality of column sensing electrode units 130 are disposed.
  • Each row of driving electrode units 120 includes a plurality of driving electrodes 122 adjacent to each other.
  • the driving electrodes 122 are connected by a connecting line 124.
  • Each column of sensing electrode units 130 includes a plurality of sensing electrodes 132.
  • the adjacent sensing electrodes 122 are connected by a jumper 134.
  • the jumper 134 is located above the connecting line 124, and drives the electrode unit 120 and The sensing electrode unit 130 is taken out through the trace 140 and then bonded to the flexible printed circuit board.
  • the design of the jumper structure requires that an insulating layer be first disposed at the position of the connecting line 124, and then a jumper 134 formed of a conductive material is disposed on the insulating layer.
  • the enlarged structure of the jumper 134 is as shown in part G of FIG.
  • the wiring is very complicated and requires high precision.
  • some solutions have a single-layer conductive material structure and do not need jumpers, as shown in FIG. 2, including 7 touch sensing areas Y00-Y07 on the left side and 7 touch sensing areas Y10-Y17 on the right side, each touch sensing area. All need to correspond to a detection channel, but do not support the mutual capacitance detection method, so that due to the limited number of detection channels, true multi-point detection cannot be performed.
  • the technical problem to be solved by the present invention is to provide a single-layer two-dimensional touch sensor, which aims to solve the problem that a single-layer structure is difficult to be routed by a single-layer structure mutual capacitance detection type touch sensor design.
  • a single-layer two-dimensional touch sensor includes a substrate and a flexible printed circuit board, and the substrate is provided with a plurality of first electrodes and a plurality of second electrodes forming a capacitor structure, and the plurality of An electrode is arranged in parallel along the first direction, and between each two adjacent first electrodes, there is a set of second electrodes which are arranged end to end in the second direction, and the meshing position has a gap, the second direction and the first direction Vertical; in each set of second electrodes, the traces of all the second electrodes are directly led out to the flexible printed circuit board, and the second electrode traces of the same order are short-circuited into one node on the flexible printed circuit board.
  • the spacing between adjacent first electrodes is no more than 10 mm.
  • the trace of the second electrode is parallel to the first electrode and is located between two adjacent first electrodes.
  • the trace of the second electrode located at the intermediate position is not adjacent to the first electrode, and is drawn near the second electrode located at the edge.
  • each of the second electrodes has a zigzag shape at the meshing portion, and the pitch of the zigzag-shaped bifurcations at both ends of the same second electrode is not more than 5 mm.
  • the meshing opening has a pitch of 1 mm to 3 mm.
  • each of the second electrodes has a zigzag shape at the meshing portion, and the zigzag-shaped bifurcations have a pitch of between 1 mm and 3 mm.
  • the area of the adjacent two second electrodes in the meshing area is equal.
  • the first electrode is rectangular.
  • binding points of the flexible printed circuit board are arranged in the first direction.
  • the length of the single-layer two-dimensional touch sensor in the first direction is smaller than the length in the second direction, and the number of the first electrodes is greater than the number of the second electrodes in each group.
  • the present invention also provides a touch terminal comprising a touch sensor, which is a single layer two-dimensional touch sensor as described above.
  • the single-layer two-dimensional touch sensor provided by the invention belongs to a mutual capacitance structure, supports multi-touch detection, improves detection precision, and directly extracts electrodes requiring jumpers to a flexible printed circuit board without using jumpers on the substrate. Shorting allows the wiring to be simplified and to some extent reduces the process requirements.
  • FIG. 1 is a wiring diagram of a single-layer two-dimensional touch sensor using a jumper method in the prior art
  • FIG. 2 is a wiring diagram of a single-layer two-dimensional touch sensor that does not support mutual capacitance detection according to the prior art
  • FIG. 3 is a schematic diagram of wiring of a single-layer two-dimensional touch sensor provided by the present invention.
  • FIG. 9 is a schematic diagram of wiring of another single-layer two-dimensional touch sensor provided by the present invention.
  • the single-layer two-dimensional touch sensor includes a substrate and a flexible printed circuit board.
  • the substrate has a plurality of first electrodes and a plurality of second electrodes respectively disposed in two mutually perpendicular directions, and the first electrode and the second electrode form a capacitor structure.
  • the two are respectively a driving electrode and a sensing electrode, that is, as long as one of the driving electrode and the sensing electrode is disposed in the horizontal direction and the other is disposed in the vertical direction, therefore, for convenience of description, the following two directions are perpendicular to each other. Defined as the first direction and the second direction.
  • a plurality of first electrodes 6 are arranged in parallel in a first direction.
  • the first electrode 6 is rectangular, and a pair of adjacent first electrodes 6 is arranged in a first direction in the second direction.
  • a plurality of second electrodes, and the meshing position has a gap g1.
  • five first electrodes are arranged in which the head and the tail are meshed, and the second electrodes 1-5 are respectively filled with oblique lines of different directions and inclination angles to distinguish
  • the traces of all the second electrodes are directly led out to the above flexible printed circuit board, and then the second electrode traces of the same order are shorted on the flexible printed circuit board.
  • the binding points of the flexible printed circuit board are arranged in the first direction.
  • the position can be determined according to the size ratio of the two electrode detection data.
  • the dense part of the line around Figure 3 is the electrode trace.
  • the spacing between adjacent first electrodes is not more than 10 mm.
  • the traces of the respective second electrodes are parallel to the first electrode 6 and are located between the two adjacent first electrodes 6.
  • the traces of the second electrodes 2, 3, 4 located at the intermediate position are not adjacent to the first electrode 6 except for the second electrodes 1 and 5 at both ends of each set of second electrodes.
  • the traces D2 and D3 of the second electrode 2, 3 in the enlarged view of the A portion are taken out through the second electrode 1, B
  • the trace D4 of the second electrode 4 in a partially enlarged view is taken through the second electrode 5.
  • each of the second electrodes has a zigzag shape at the meshing portion, and the upper and lower electrodes can be affected when the finger is lightly touched.
  • the C portion is enlarged as shown in FIG.
  • the spacing between the openings of the zigzag bifurcations at both ends of the same second electrode is not more than 5 mm, preferably mm-3 mm.
  • the zigzag bifurcation pitch g3 is between 1 mm and 3 mm, and the area of the covered second electrode can be uniformly excessive when the finger is slid left and right.
  • the software in order to enable the adjacent second electrode to obtain complementary and symmetrical detection data, it is convenient for the software to accurately calculate the coordinates of the touch point, and also ensure that the area of the adjacent two second electrodes in the meshing area is equal or approximate. Equally, in the enlarged view of the portion E shown in Fig. 8, in the meshing region g4, the areas of the two second electrodes are equal or approximately equal.
  • the single-layer two-dimensional touch sensor can be applied to various touch terminals.
  • the length of the single-layer two-dimensional touch sensor in the first direction is smaller than the length in the second direction, the first electrode 6
  • the number of the second electrodes is larger than the number of the second electrodes in each group.
  • the number of electrodes in the two directions of the design is allocated according to the FPC binding position, and the density is high at the binding end of the flexible printed circuit board.
  • the first electrode is distributed at a 5 mm interval, and the first electrode can be directly connected to the binding region after being taken out from the visible region.
  • the other dimension distributes fewer second electrodes to reduce the difficulty of the leads while the second electrodes are intermeshing.
  • the second electrode being W-shaped.
  • the shape of the second electrode can also be flexibly designed into other shapes, as shown in FIG. 9 , and the second electrode 1-5 is sequentially arranged in the second direction.
  • the first and second tails are meshed with each other, and the first electrodes 6 are arranged in parallel in the first direction.
  • a filling block 7 formed of a conductive material may be designed between the first electrode and the second electrode in FIG. 9 to ensure uniform transmittance of the entire touch screen.
  • the filling block may also be designed in FIG. No longer.

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  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
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  • General Physics & Mathematics (AREA)
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Abstract

本发明适用于触控技术领域，提供了一种单层式二维触摸传感器，包括一基板和柔性印刷电路板，其特征在于，所述基板上布设有形成电容结构的若干第一电极和若干第二电极，所述若干第一电极沿第一方向平行排列，在每两个相邻的第一电极之间有一组沿第二方向依次首尾相啮合排列的若干第二电极，第二方向与第一方向垂直；在各组第二电极中，所有第二电极的走线直接引出至所述柔性印刷电路板，相同次序的第二电极走线在所述柔性印刷电路板上短接成一个节点。本发明提供的单层式二维触摸传感器属于互电容结构，支持多点触控检测，提高了检测精度，而且在基板上无需跳线，降低了对工艺条件的要求。

Description

单层式二维触摸传感器及触控终端 技术领域
本发明属于触控技术领域，尤其涉及一种单层式二维触摸传感器及触控终端。
背景技术
传统的触摸面板通常需要多层导电材料结构（如ITO），有些虽然只用一层ITO，但却需要在X方向-Y方向交叉点处增加跳线以形成X、Y两个维度相互交叉的网络，如图1所示,传感器100包括一基板110，在基板110上布设有若干行驱动电极单元120和若干列感应电极单元130，每行驱动电极单元120包括多个驱动电极122，相邻的驱动电极122通过连接线124连接，每列感应电极单元130包括多个感应电极132，相邻的感应电极122通过跳线134连接，跳线134位于连接线124的上方，驱动电极单元120和感应电极单元130通过走线140引出，然后和柔性印刷电路板绑定。设计跳线结构需要在连接线124的位置首先布设一绝缘层，然后再在绝缘层上布设由导电材料形成的跳线134，跳线134的放大结构如图1中的G部分所示，这种布线非常复杂，对工艺精度要求较高。
而有些方案虽然单层导电材料结构且无需跳线，如图2所示，包括左侧的7个触摸感应区域Y00-Y07和右侧的7个触摸感应区域Y10-Y17，每一个触摸感应区域都需要对应一检测通道，却不支持互电容的检测方式，以致由于检测通道数量所限而无法做到真实多点检测。
 技术问题
本发明所要解决的技术问题在于提供一种单层式二维触摸传感器，旨在通过单层结构互电容检测方式的触摸传感器设计解决单层结构不易走线的问题。
技术解决方案
本发明是这样实现的，一种单层式二维触摸传感器，包括一基板和柔性印刷电路板，所述基板上布设有形成电容结构的若干第一电极和若干第二电极，所述若干第一电极沿第一方向平行排列，在每两个相邻的第一电极之间有一组沿第二方向依次首尾相啮合排列的第二电极，且啮合位置有间隙，第二方向与第一方向垂直；在各组第二电极中，所有第二电极的走线直接引出至所述柔性印刷电路板，相同次序的第二电极走线在所述柔性印刷电路板上短接成一个节点。
进一步地，相邻的第一电极之间的间距不大于10mm。
进一步地，所述第二电极的走线与第一电极平行且位于两个相邻的第一电极之间。
进一步地，在每组第二电极中，位于中间位置的第二电极的走线与第一电极不相邻，就近穿过位于边缘的第二电极引出。
进一步地，每个第二电极在啮合部位处呈锯齿形，同一个第二电极两端锯齿形分叉的开口处间距不超过5mm。
进一步地，所述啮合开口处间距为1mm-3mm。
进一步地，每个第二电极在啮合部位处呈锯齿形，锯齿形的分叉的间距在1mm-3mm之间。
进一步地，在相邻两个第二电极在啮合区域的面积相等。
进一步地，所述第一电极为矩形。
进一步地，所述柔性印刷电路板的绑定点沿第一方向排列。
进一步地，所述单层式二维触摸传感器沿第一方向的长度小于沿第二方向的长度，所述第一电极的数量大于每组中第二电极的数量。
本发明还提供了一种触控终端，包括一触摸传感器，所述触摸传感器为如上所述的单层式二维触摸传感器。
 有益效果
本发明提供的单层式二维触摸传感器属于互电容结构，支持多点触控检测，提高了检测精度，而且在基板上无需跳线，直接将需要跳线的电极引出至柔性印刷线路板上短接，使布线得到简化，并且在一定程度上降低了对工艺条件的要求。
附图说明
图1是现有技术提供的使用跳线方式走线的单层式二维触摸传感器的布线图；
图2是现有技术提供的不支持互电容检测方式的单层式二维触摸传感器的布线图；
图3是本发明提供的一种单层式二维触摸传感器的布线示意图；
图4、5、6、7、8分别是图3中A部分、B部分、C部分、D部分、E部分的放大图；
图9是本发明提供的另一种单层式二维触摸传感器的布线示意图。
 本发明的实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
单层式二维触摸传感器包括一基板和柔性印刷电路板，基板上在相互垂直的两个方向分别分布有若干第一电极和若干第二电极，第一电极和第二电极可形成电容结构，两者分别为驱动电极和感应电极，即，只要保证驱动电极和感应电极中的一个在水平方向布设另一个在垂直方向布设即可，因此，为表述方便，下文分别将相互垂直的两个方向定义为第一方向和第二方向。
参照图3，若干第一电极6沿第一方向平行排列，图3中第一电极6为矩形，在每两个相邻的第一电极6之间有一组沿第二方向依次首尾相啮合排列的若干第二电极，且啮合位置有间隙g1，图3中共示出了5个首尾相啮合排列的第二电极，分别对第二电极1-5填充不同方向和倾斜角度的斜线以示区分，在各组第二电极中，为避免跳线出现，所有第二电极的走线直接引出至上述柔性印刷电路板，然后相同次序的第二电极走线在所述柔性印刷电路板上短接成一个节点，柔性印刷电路板的绑定点沿第一方向排列。当手指触摸位置在两个极板之间时，可以根据两个电极检测数据的大小比例来确定位置。图3四周线条密集部分为电极走线。
进一步地，为保证手指或触控笔触摸时能影响到两个或两个以上的第一电极，相邻的第一电极之间的间距不大于10mm。
上述各个第二电极的走线均与第一电极6平行，且位于两个相邻的第一电极6之间。为避免静态电容过大，在每组第二电极中，出两端的第二电极1和5之外，位于中间位置的第二电极2、3、4的走线与第一电极6不相邻，就近穿过位于边缘的第二电极1或5引出，如图4和图5所示，A部分放大图中第二电极2、3的走线D2、D3穿过第二电极1引出，B部分放大图中第二电极4的走线D4穿过第二电极5引出。
如图1所示，每个第二电极在啮合部位处呈锯齿形，为确保手指轻触时能影响到上下两个电极，在每组第二电极中，如图6所示的C部分放大图中，同一个第二电极两端锯齿形分叉的开口处间距不超过5mm，优选为mm-3mm。
进一步地，如图7所示的D部分放大图中，锯齿形的分叉的间距g3在1mm-3mm之间，确保手指左右滑动时，覆盖住的第二电极的面积能均匀过度。
在设计时，为使相邻的第二电极能得到互补且对称的检测数据，便于软件准确的计算出触摸点的坐标，还要保证相邻两个第二电极在啮合区域的面积相等或近似相等，如图8示出的E部分的放大示意图中啮合区域g4中，两个第二电极的面积相等或近似相等。
现有的方案，在分配X，Y方向电极数目时，通常以屏的物理尺寸为依据，长边分配的电极数目多，而短边分配的电极数目少。这种方案在采用多层ITO的结构条件下比较容易实现，而采用单层方案时，会导致两边导线数目剧增，而对于崇尚窄边框设计的手持设备来讲，基本上不可实现。
上述单层式二维触摸传感器可应用于各种触控终端中，对于窄边框手持设备，即单层式二维触摸传感器沿第一方向的长度小于沿第二方向的长度，第一电极6的数量大于每组中第二电极的数量，如图1所示，本设计的两个方向电极数目的分配根据FPC绑定位置而定，在柔性印刷电路板绑定端以较高密度（约5mm间隔）分布第一电极，第一电极从可视区引出之后可直接连接到绑定区域。而另一个维度分配较少第二电极以减扫引线的难度，同时第二电极间相互啮合。
图3至图8以第二电极为W型进行描述，设计时第二电极的形状还可灵活设计为其他形状，如图9所示的V型，第二电极1-5沿第二方向依次首尾相啮合排列，第一电极6沿第一方向平行排列。
进一步地，还可在图9中第一电极和第二电极之间设计由导电材料形成的填充块7，以保证整个触摸屏的透光率一致，当然，也可以在图3中设计填充块，不再赘述。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (12)

  1. 一种单层式二维触摸传感器，包括一基板和柔性印刷电路板，其特征在于，所述基板上布设有形成电容结构的若干第一电极和若干第二电极，所述若干第一电极沿第一方向平行排列，在每两个相邻的第一电极之间有一组沿第二方向依次首尾相啮合排列的第二电极，且啮合位置有间隙，第二方向与第一方向垂直；在各组第二电极中，所有第二电极的走线直接引出至所述柔性印刷电路板，相同次序的第二电极走线在所述柔性印刷电路板上短接成一个节点。
  2. 如权利要求1所述的单层式二维触摸传感器，其特征在于，相邻的第一电极之间的间距不大于10mm。
  3. 如权利要求1所述的单层式二维触摸传感器，其特征在于，所述第二电极的走线与第一电极平行且位于两个相邻的第一电极之间。
  4. 如权利要求3所述的单层式二维触摸传感器，其特征在于，在每组第二电极中，位于中间位置的第二电极的走线与第一电极不相邻，就近穿过位于边缘的第二电极引出。
  5. 如权利要求1所述的单层式二维触摸传感器，其特征在于，每个第二电极在啮合部位处呈锯齿形，同一个第二电极两端锯齿形分叉的开口处间距不超过5mm。
  6. 如权利要求5所述的单层式二维触摸传感器，其特征在于，所述啮合开口处间距为1mm-3mm。
  7. 如权利要求1所述的单层式二维触摸传感器，其特征在于，每个第二电极在啮合部位处呈锯齿形，锯齿形的分叉的间距在1mm-3mm之间。
  8. 如权利要求1所述的单层式二维触摸传感器，其特征在于，相邻两个第二电极在啮合区域的面积相等。
  9. 如权利要求1所述的单层式二维触摸传感器，其特征在于，所述第一电极为矩形。
  10. 如权利要求1所述的单层式二维触摸传感器，其特征在于，所述柔性印刷电路板的绑定点沿第一方向排列。
  11. 如权利要求1所述的单层式二维触摸传感器，其特征在于，所述单层式二维触摸传感器沿第一方向的长度小于沿第二方向的长度，所述第一电极的数量大于每组中第二电极的数量。
  12. 一种触控终端，包括一触摸传感器，其特征在于，所述触摸传感器为权利要求1至11任一项所述的单层式二维触摸传感器。
PCT/CN2012/081561 2012-03-07 2012-09-18 单层式二维触摸传感器及触控终端 WO2013131361A1 (zh)

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