WO2016101310A1 - 一种可挠式触控面板 - Google Patents

一种可挠式触控面板 Download PDF

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Publication number
WO2016101310A1
WO2016101310A1 PCT/CN2014/095572 CN2014095572W WO2016101310A1 WO 2016101310 A1 WO2016101310 A1 WO 2016101310A1 CN 2014095572 W CN2014095572 W CN 2014095572W WO 2016101310 A1 WO2016101310 A1 WO 2016101310A1
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WIPO (PCT)
Prior art keywords
electrode pattern
distance
touch panel
detecting
driving electrode
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Ceased
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PCT/CN2014/095572
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English (en)
French (fr)
Inventor
张君恺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/426,370 priority Critical patent/US9645685B2/en
Publication of WO2016101310A1 publication Critical patent/WO2016101310A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; 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
    • G06F3/0447—Position sensing using the local deformation of sensor cells

Definitions

  • the present invention relates to the field of touch panels, and in particular to a flexible touch panel.
  • Touch screens mainly have resistive and capacitive types. Capacitive touch screens are widely used because they can achieve multi-touch.
  • the capacitive touch screen mainly works by the induced current of the human body.
  • the inductive capacitive touch screen includes a plurality of horizontal and vertical electrodes. When the finger touches the touch screen, the capacitance between the electrodes changes, and then according to the capacitance. The change determines the location of the touch point.
  • the widely used touch panel is basically a non-bendable flat straight plate.
  • the merchant has also begun to use and develop a flexible touch panel, which has a certain degree of curvature and is based on a capacitive touch screen.
  • the principle realizes touch positioning.
  • different positions of the existing flexible touch panel have different degrees of curvature. Under the influence of the curvature, the variation of the mutual inductance difference is large, and the touch panel cannot be accurately positioned according to the mutual capacitance difference.
  • the present invention provides a flexible touch panel to solve the problem of large variation in mutual capacitance difference caused by bending of the flexible touch panel in the prior art.
  • one technical solution adopted by the present invention is to provide a flexible touch panel including a plurality of driving electrode patterns and a plurality of detecting electrode patterns, wherein a distance between the driving electrode patterns and the detecting electrode patterns When the flexible touch panel is bent, the mutual inductance difference between the driving electrode pattern and the detecting electrode pattern changes inversely in different regions of the flexible touch panel, wherein the mutual inductance difference exists.
  • the distance between the driving electrode pattern and the adjacent detecting electrode pattern is set to be smaller than a predetermined distance, and in another portion of the flexible touch panel, the driving electrode pattern is driven.
  • the distance between the adjacent detection electrode patterns is set to be greater than a predetermined distance, and the predetermined distance is a distance value corresponding to the maximum mutual inductance capacitance difference in the variation curve of the mutual inductance capacitance difference with the distance between the driving electrode pattern and the detection electrode pattern.
  • each driving electrode pattern and the detecting electrode pattern are staggered with each other, and each driving electrode pattern is disposed adjacent to the at least two detecting electrode patterns, wherein a distance between the driving electrode pattern and a portion of the adjacently disposed detecting electrode patterns is set less than a predetermined The distance between the driving electrode pattern and the detecting electrode pattern disposed adjacent to another portion is set larger than a predetermined distance.
  • the driving electrode pattern and the detecting electrode pattern are respectively arranged in a diamond shape, and sides of the driving electrode pattern and sides of the detecting electrode pattern are parallel to each other.
  • one of the driving electrode pattern and the detecting electrode pattern is a polygonal electrode pattern
  • the other of the driving electrode pattern and the detecting electrode pattern is a circular arc-shaped electrode pattern
  • the circular arc-shaped electrode pattern surrounds the polygonal electrode pattern
  • the polygonal electrode pattern and the circular arc electrode pattern are arranged concentrically with each other.
  • a flexible touch panel including a plurality of driving electrode patterns and a plurality of detecting electrode patterns, wherein the driving electrode patterns and the detecting electrode patterns are alternately arranged with each other And each driving electrode pattern is disposed adjacent to the at least two detecting electrode patterns, wherein a distance between the driving electrode pattern and a portion of the adjacently disposed detecting electrode patterns is not equal to a detecting electrode disposed adjacent to the driving electrode pattern and another portion The distance between the patterns.
  • a distance between the driving electrode pattern and a portion of the adjacent detecting electrode patterns is set to be smaller than a predetermined distance, and a distance between the driving electrode patterns and the detecting electrode patterns disposed adjacent to the other portion is set larger than a predetermined distance, wherein the predetermined distance is mutual inductance
  • the difference between the capacitance difference and the maximum mutual inductance capacitance difference in the variation curve between the driving electrode pattern and the detecting electrode pattern, and the mutual inductance difference is the mutual inductance between the driving electrode pattern and the detecting electrode pattern when there is a touch action There is no difference between the mutual inductance between the driving electrode pattern and the detecting electrode pattern when the touch action is performed.
  • a flexible touch panel including a plurality of driving electrode patterns and a plurality of detecting electrode patterns, one of a driving electrode pattern and a detecting electrode pattern.
  • the polygon electrode pattern is the other, and the other of the driving electrode pattern and the detecting electrode pattern is a circular arc electrode pattern, the circular arc electrode pattern is surrounded by the polygonal electrode pattern, and the polygonal electrode pattern and the circular arc electrode pattern are concentrically arranged with each other.
  • the distance between the end point of the side of the polygon electrode pattern and the arc-shaped electrode pattern is less than a predetermined distance, and the distance between the center points of the sides of the polygon electrode pattern is greater than a predetermined distance, and the predetermined distance is a mutual capacitance difference with the driving electrode pattern
  • the distance value corresponding to the maximum mutual inductance capacitance difference in the variation curve of the distance between the detection electrode patterns, and the mutual inductance difference is the mutual inductance capacitance between the driving electrode pattern and the detection electrode pattern when there is a touch operation and when there is no touch operation A difference between the mutual inductance between the driving electrode pattern and the detecting electrode pattern.
  • the flexible touch panel of the present invention includes a plurality of driving electrode patterns and a plurality of detecting electrode patterns, and when there is no touch action, the driving electrode pattern and the detecting electrode There is a mutual inductance between the patterns, and when there is a touch action, another mutual inductance capacitor is generated between the driving electrode pattern and the detecting electrode pattern, and the difference between the two mutual inductance capacitors is a mutual inductance difference, and the mutual capacitance difference is larger.
  • the touch response is more obvious.
  • the flexible touch panel has a certain degree of curvature, the distance between the driving electrode pattern and the detecting electrode pattern changes due to the bending equivalent, and then the mutual inductance difference also mutates.
  • the touch positioning is affected, so the distance between the driving motor pattern and the detecting electrode pattern is set such that when the flexible touch panel is bent, the driving electrode pattern and the detecting are performed in different regions of the flexible touch panel.
  • the mutual inductance difference between the electrode patterns changes in the reverse direction, so that the overall mutual inductance capacitance difference changes little, that is, the touch is reduced. Plate bending caused by difference in mutual capacitance variation.
  • FIG. 1 is a schematic structural view of a first embodiment of a flexible touch panel of the present invention
  • FIG. 2 is a schematic diagram of a principle of determining a touch by a mutual inductance difference of a flexible touch panel of the present invention
  • FIG. 3 is a schematic view showing the appearance of a flexible touch panel after bending
  • FIG. 4 is a schematic view showing an electric field formed before the touch panel shown in FIG. 3 is bent;
  • FIG. 5 is a schematic view showing an electric field formed by the curved touch panel shown in FIG. 3;
  • FIG. 6 is a schematic diagram showing a change in mutual capacitance difference with a distance between a driving electrode pattern and a detecting electrode pattern
  • FIG. 7 is a schematic structural view of a second embodiment of a flexible touch panel of the present invention.
  • FIG. 1 is a schematic structural view of a first embodiment of a flexible touch panel of the present invention.
  • the embodiment provides a flexible touch panel 100 including a plurality of driving electrode patterns 101 and a plurality of detecting electrode patterns 102.
  • the distance between the driving electrode patterns and the detecting electrode patterns is denoted as D.
  • the touch panel 100 in this embodiment is a mutual-capacitance capacitive type, and it is determined whether the corresponding position of the touch panel 100 is touched by detecting the mutual inductance difference ⁇ Cm between the driving electrode pattern 101 and the detecting electrode pattern 102.
  • FIG. 2 is a schematic diagram of the principle of determining the touch by the mutual inductance difference of the flexible touch panel of the present invention.
  • a mutual inductance capacitor Cm is formed between the driving electrode and the detecting electrode.
  • the finger touches the finger acts as a conductor and the electrode forms an external capacitor Cf, and the external capacitor Cf forms a parallel circuit with the mutual inductance capacitor Cm, changing the mutual inductance capacitor Cm.
  • a high-frequency alternating voltage is usually applied to the driving electrode while detecting the current of the detecting electrode.
  • the high-frequency alternating voltage generates electric field energy between the driving electrode and the detecting electrode.
  • the finger touches a part of the electric field energy flows to the finger, so that the electric field energy of the driving electrode flowing to the detecting electrode is reduced, and then the current of the detecting electrode is decreased. Therefore, it is possible to know whether or not ⁇ Cm appears when the current of the detecting electrode is detected.
  • FIG. 3 is a schematic view of the flexible touch panel after bending, in which there are two bending modes of A and B.
  • the curved touch panel 100 is different from the touch panel 100 having no curvature, and the electric field and the mutual inductance Cm between the driving electrode pattern 101 and the detecting electrode pattern 102 are changed.
  • FIG. 4 and FIG. 5 are schematic diagram of an electric field formed before the touch panel of FIG. 3 is bent, and FIG. 5 is a schematic diagram of an electric field formed by the curved touch panel shown in FIG.
  • the surface of the driving electrode pattern 101 and the detecting electrode pattern 102 facing the finger tend to move away from each other.
  • the distance D between the driving electrode pattern 101 and the detecting electrode pattern 102 is increased.
  • the electric field distribution between the electrode patterns is more sparse, and the mutual inductance capacitor Cm is reduced; when the finger is touched, the distance from the two electrode patterns is farther, so the external capacitance Cf is reduced, and similarly, in the case where the distance D is increased, it is not simple. It is judged whether ⁇ Cm is increased or decreased.
  • FIG. 6 is a schematic diagram showing the relationship between the mutual inductance capacitance difference and the distance between the driving electrode pattern and the detecting electrode pattern. A critical point t can be seen in Figure 6.
  • the distance D between the driving electrode pattern 101 and the detecting electrode pattern 102 in the entire touch panel 100 is set to be the same, when the bending occurs, the curved region drives between the electrode pattern 101 and the detecting electrode pattern 102.
  • the distance D will increase or decrease, and the corresponding ⁇ Cm will increase or decrease accordingly, that is, a large variation will occur.
  • the touch detection is performed, if the ⁇ Cm variation is large, it is easy to detect ⁇ Cm, and the touch function of the touch panel is malfunctioning.
  • the distance between the driving electrode pattern 101 and the detecting electrode pattern 102 is designed by using the variation law of ⁇ Cm versus D, so that the mutual inductance capacitance difference ⁇ Cm changes in the opposite direction in different regions, and can cancel each other to The variation of ⁇ Cm of the entire touch panel 100 at the time of bending is reduced.
  • the distance Da between the driving electrode pattern 101 and the adjacent detecting electrode pattern 102 in the area a of the touch panel 100 of the present embodiment is set to be smaller than the predetermined distance Dt, b.
  • the distance Db between the in-region driving electrode pattern 101 and the adjacent detecting electrode pattern 102 is set to be larger than the predetermined distance Dt.
  • the driving electrode pattern 101 and the detecting electrode pattern 102 in the touch panel 100 are respectively diamond-shaped, square, or rectangular, in consideration of space utilization, simplification of the process, sensitivity of touch, and the like.
  • the sides are parallel to each other; the driving electrode pattern 101 and the detecting electrode pattern 102 are alternately arranged with each other, the driving electrode pattern 101 is adjacent to at least two detecting electrode patterns 102, and the distance between the driving electrode pattern 101 and a portion of the adjacent detecting electrode patterns 102 Set to be smaller than the predetermined distance Dt, the distance between the detection electrode patterns 102 adjacent to another portion is set to be larger than the predetermined distance Dt.
  • FIG. 7 is a schematic structural diagram of a second embodiment of the flexible touch panel of the present invention.
  • the embodiment provides a flexible touch panel 200 including a plurality of driving electrode patterns 201 and a plurality of detecting electrode patterns 202, wherein the driving electrode patterns 201 are polygonal electrode patterns, and the detecting electrode patterns 202 are arc-shaped electrode patterns.
  • the detecting electrode pattern 202 is disposed around the driving electrode pattern 201, and the design of this structure is such that the distance from the side to the circular arc tends to gradually change.
  • the touch panel 200 of the present embodiment also includes a distance Dc between the driving electrode pattern 201 and the adjacent detecting electrode pattern 202 that is less than a predetermined distance Dt.
  • the region, and the distance Dd between the driving electrode pattern 201 and the adjacent detecting electrode pattern 202 are larger than the d region of the predetermined distance Dt.
  • the distance Dc between the end point of the side of the polygonal pattern and the circular arc pattern is set to be smaller than The predetermined distance Dt, and the distance Dd between the center points of the sides of the polygon electrode pattern is greater than the predetermined distance Dt.
  • the polygonal electrode pattern is a regular octagon
  • the circular arc electrode pattern is circular
  • the polygonal electrode pattern and the circular arc electrode pattern are concentrically arranged.
  • the driving electrode pattern 201 can be set as a circular arc electrode pattern
  • the detecting electrode pattern 202 can be set as a polygonal electrode pattern
  • the polygonal pattern can also be a triangle, a quadrangle or even Dodecagons, etc., of course, the more the number of sides, the closer the polygon pattern is to the circle, which will be detrimental to the design of the distance.
  • the flexible touch panel of the present invention includes a plurality of driving electrode patterns and a plurality of detecting electrode patterns.
  • a mutual capacitance exists between the driving electrode patterns and the detecting electrode patterns.
  • another mutual inductance capacitor is generated between the driving electrode pattern and the detecting electrode pattern, and the difference between the two mutual inductance capacitors is a mutual inductance difference, but when the flexible touch panel has a certain degree of curvature,
  • the distance between the driving electrode pattern and the detecting electrode pattern changes due to the bending equivalent, and then the mutual inductance difference also mutates, and the variation affects the touch positioning, so the distance between the driving motor pattern and the detecting electrode pattern is set such that
  • the mutual capacitance difference between the driving electrode pattern and the detecting electrode pattern changes inversely in different regions of the flexible touch panel, so that the overall mutual inductance capacitance difference is changed.
  • Small that is, reducing the mutual inductance difference variation caused by

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Position Input By Displaying (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

一种可挠式触控面板（100,200），其包括多个驱动电极图案（101,201）和多个检测电极图案（102,202），其中驱动电极图案（101,201）和检测电极图案（102,202）之间的距离设置成使得当可挠式触控面板（100,200）发生弯曲时，在可挠式触控面板（100,200）的不同区域，驱动电极图案（101,201）与检测电极图案（102,202）之间的互感电容差呈反向变化，其中互感电容差为存在触控动作时驱动电极图案（101,201）和检测电极图案（102,202）之间的互感电容与不存在触控动作时驱动电极图案（101,201）和所述检测电极图案（102,202）之间的互感电容之间的差值。该可挠式触控面板能够减小触控面板弯曲所导致的互感电容差变异。

Description

一种可挠式触控面板
【技术领域】
本发明涉及触控面板领域，尤其是涉及一种可挠式触控面板。
【背景技术】
电子设备中越来越多的使用触控屏来作为输入设备，触控屏主要有电阻式和电容式，电容式触控屏由于能够实现多点触控，因此当前使用中较为广泛。电容式触控屏主要通过人体的感应电流进行工作，其中感应电容式触控屏包括多个水平和垂直的电极，手指接触触控屏时，会使得电极间的电容发生变化，继而根据电容的变化确定触摸点的位置。
当前大量使用的触控面板基本为不可弯曲的平面直板，为了满足人们的使用需求，商家也开始使用和研发可挠式触控面板，其具有一定的弯曲度，且基于电容式触控屏的原理实现触控定位。然而现有可挠式触控面板的不同位置具有不同的弯曲度，在此弯曲度的影响下互感电容差的变异较大，容易导致触控面板无法根据互感电容差进行准确的定位。
【发明内容】
本发明提供一种可挠式触控面板以解决现有技术中可挠式触控面板弯曲所导致的互感电容差变异较大的问题。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种可挠式触控面板，包括多个驱动电极图案和多个检测电极图案，其中驱动电极图案和检测电极图案之间的距离设置成使得当可挠式触控面板发生弯曲时，在可挠式触控面板的不同区域，驱动电极图案与检测电极图案的之间的互感电容差呈反向变化，其中互感电容差为存在触控动作时驱动电极图案和检测电极图案之间的互感电容与不存在触控动作时驱动电极图案和检测电极图案之间的互感电容之间的差值。
其中，在可挠式触控面板的一部分区域内，驱动电极图案与相邻的检测电极图案之间的距离设置成小于预定距离，在可挠式触控面板的另一部分区域内，驱动电极图案与相邻的检测电极图案之间的距离设置成大于预定距离，预定距离为互感电容差随驱动电极图案和检测电极图案之间距离的变化曲线中的最大互感电容差所对应的距离值。
其中，驱动电极图案和检测电极图案彼此交错设置，且每一驱动电极图案与至少两个检测电极图案相邻设置，其中驱动电极图案与一部分相邻设置的检测电极图案之间的距离设置小于预定距离，驱动电极图案与另一部分相邻设置的检测电极图案之间的距离设置大于预定距离。
其中，驱动电极图案和检测电极图案分别呈菱形设置，且驱动电极图案的边和检测电极图案的边彼此平行。
其中，驱动电极图案和检测电极图案中的一者为多边形电极图案，而驱动电极图案和检测电极图案中的另一者为圆弧形电极图案，其中圆弧形电极图案环绕于多边形电极图案，其中多边形电极图案的边的端点与圆弧形电极图案之间的距离小于预定距离，而多边形电极图案的边的中心点之间的距离大于预定距离。
其中，多边形电极图案和圆弧形电极图案彼此同心设置。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种可挠式触控面板，包括多个驱动电极图案和多个检测电极图案，其中驱动电极图案和检测电极图案彼此交错设置，且每一驱动电极图案与至少两个检测电极图案相邻设置，其中驱动电极图案与一部分相邻设置的检测电极图案之间的距离设置不等于驱动电极图案与另一部分相邻设置的检测电极图案之间的距离。
其中，驱动电极图案与一部分相邻设置的检测电极图案之间的距离设置小于预定距离，驱动电极图案与另一部分相邻设置的检测电极图案之间的距离设置大于预定距离，其中预定距离为互感电容差随驱动电极图案和检测电极图案之间距离的变化曲线中的最大互感电容差所对应的距离值，互感电容差为存在触控动作时驱动电极图案和检测电极图案之间的互感电容与不存在触控动作时驱动电极图案和检测电极图案之间的互感电容之间的差值。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种可挠式触控面板，其包括多个驱动电极图案和多个检测电极图案，驱动电极图案和检测电极图案中的一者为多边形电极图案，而驱动电极图案和检测电极图案中的另一者为圆弧形电极图案，圆弧形电极图案环绕于多边形电极图案，多边形电极图案和圆弧形电极图案彼此同心设置。
其中，多边形电极图案的边的端点与圆弧形电极图案之间的距离小于预定距离，而多边形电极图案的边的中心点之间的距离大于预定距离，预定距离为互感电容差随驱动电极图案和检测电极图案之间距离的变化曲线中的最大互感电容差所对应的距离值，互感电容差为存在触控动作时驱动电极图案和检测电极图案之间的互感电容与不存在触控动作时驱动电极图案和检测电极图案之间的互感电容之间的差值。
本发明的有益效果是：区别于现有技术的情况，本发明可挠式触控面板包括多个驱动电极图案和多个检测电极图案，当不存在触控动作时，驱动电极图案及检测电极图案之间存在一个互感电容，而当存在触控动作时，驱动电极图案及检测电极图案之间产生另一互感电容，两互感电容之间产生的差值为互感电容差，互感电容差越大，则触控反应越明显，然而当可挠式触控面板具有一定弯曲度时，驱动电极图案以及检测电极图案的距离由于弯曲等效而发生变化，继而使得互感电容差也发生变异，此变异会影响到触控定位，因此将驱动电机图案和检测电极图案之间的距离设置成使得当可挠式触控面板发生弯曲时，在可挠式触控面板的不同区域，驱动电极图案与检测电极图案的之间的互感电容差呈反向变化，以使得整体的互感电容差变化较小，即减小触控面板弯曲所导致的互感电容差变异。
【附图说明】
图1是本发明可挠式触控面板第一实施例的结构示意图；
图2是本发明可挠式触控面板通过互感电容差判断触摸的原理示意图；
图3是可挠式触控面板弯曲后的外形示意图；
图4是图3所示触控面板弯曲前所形成电场的示意图；
图5是图3所示弯曲的触控面板形成电场的示意图；
图6是互感电容差随驱动电极图案和检测电极图案之间距离的变化曲线示意图；
图7是本发明可挠式触控面板第二实施例的结构示意图。
【具体实施方式】
请参阅图1，图1是本发明可挠式触控面板第一实施例的结构示意图。本实施例提供一种可挠式触控面板100，其包括多个驱动电极图案101和多个检测电极图案102，驱动电极图案和检测电极图案之间的距离记为D。
本实施例中的触控面板100为互感电容式，通过检测驱动电极图案101和检测电极图案102之间的互感电容差ΔCm来判断触控面板100相应的位置是否发生触摸。具体原理请参阅图2，图2是本发明可挠式触控面板通过互感电容差判断触摸的原理示意图。在图2中，驱动电极和检测电极之间形成互感电容Cm、当手指进行触摸时，手指作为导体与电极形成外部电容Cf，而外部电容Cf与互感电容Cm形成并联电路，改变了互感电容Cm的容量，得到一个新的互感电容Cm1，改变量即为互感电容差ΔCm = Cm – Cm1，其中Cm1与Cm同向变化、且与Cf反向变化。若检测到某电极出现互感电容差ΔCm，则说明触控面板上与该电极对应的位置出现触摸动作。
为了能够检测到ΔCm，通常对驱动电极加高频交流电压，同时对检测电极的电流进行检测。高频交流电压使得驱动电极和检测电极之间产生电场能量，当手指进行触摸时，该电场能量一部分流向手指，使得驱动电极流向检测电极的电场能量减小，继而检测电极的电流减小。因此对检测电极的电流进行检测即能够得知是否出现ΔCm。
将可挠式触控面板100弯曲，达到如图3所示的形状，图3是可挠式触控面板弯曲后的外形示意图，其中有A和B的两种弯曲方式。弯曲后的触控面板100相较没有弯曲的触控面板100，驱动电极图案101和检测电极图案102之间电场以及互感电容Cm均会发生变化。具体请参阅图4和图5，图4是图3所示触控面板弯曲前所形成电场的示意图，图5是图3所示弯曲的触控面板形成电场的示意图。
图4所示的触控面板100，在没有触摸动作时，驱动电极图案101和检测电极图案102之间电场具有互感电容Cm，出现触摸动作后，手指与两电极图案之间形成外部电容Cf，此时产生新的互感电容Cm1，继而互感电容差ΔCm = Cm – Cm1。若将触控面板100弯曲成图3中的形状，请一并参阅图5，其中A区域的驱动电极图案101和检测电极图案102面向手指的表面趋向于相互靠近，相当于触控面板100未弯曲时，驱动电极图案101和检测电极图案102的距离D减小。此时两电极图案之间电场分布更密集，互感电容Cm增大；而手指进行触摸时，相应的与两电极图案的距离更近，因此外部电容Cf增大，由于Cm1与Cm同向变化、且与Cf反向变化，即Cm1随着Cm的增大而增大、且随着Cf的增大而减小，因此无法判断Cm1是增大还是减小，即使有公式ΔCm = Cm – Cm1，在距离D减小的情况下，也无法简单判断ΔCm是增大还是减小。
在B区域，驱动电极图案101和检测电极图案102面向手指的表面趋向于相互远离，相当于触控面板100未弯曲时，驱动电极图案101和检测电极图案102的距离D增大，此时两电极图案之间的电场分布更稀疏，互感电容Cm减小；手指触摸时，与两电极图案的距离更远，因此外部电容Cf减小，同理在距离D增大的情况下，也无法简单判断ΔCm是增大还是减小。
因此对互感电容差ΔCm与距离D的关系进行实验，对多个数值D计算其相应的ΔCm，最后得到ΔCm相对于D的变化趋势，随着D的增大，ΔCm是先增大后减小的。请参阅图6，图6是互感电容差随驱动电极图案和检测电极图案之间距离的变化曲线示意图。图6中可以看到一个临界点t (Dt, ΔCmt)，即驱动电极图案和所述检测电极图案之间距离为预定距离Dt时，互感电容差ΔCmt最大，且当距离D小于Dt时，ΔCm随着D的增大而增大；当D大于t时，ΔCm随着D的增大而减小。
由此可推知，若是整个触控面板100中驱动电极图案101和检测电极图案102之间的距离D均设置为相同，则出现弯曲时，该弯曲区域驱动电极图案101和检测电极图案102之间的距离D会增大或减小，相应的ΔCm则会相应的增大或减小，即出现较大的变异。在进行触摸检测时，若ΔCm变异较大，则很容易无法检测到ΔCm，导致触控面板的触控功能失灵。
因此，在本实施例中利用ΔCm相对D的变化规律，设计驱动电极图案101和检测电极图案102之间的距离，以使得在不同区域，互感电容差ΔCm呈反向变化，能相互抵消，以减小弯曲时触控面板100整体的ΔCm的变异。
请一并参阅图1和图6，图1中本实施例的触控面板100的a区域内驱动电极图案101与相邻的检测电极图案102之间的距离Da设置成小于预定距离Dt，b区域内驱动电极图案101与相邻的检测电极图案102之间的距离Db设置成大于预定距离Dt。当弯曲导致Da和Db增大（减小）时，则Da相应的ΔCma增大（减小），Db相应的ΔCmb减小（增大），ΔCma与ΔCmb呈反向变化。即本实施例的触控面板100在弯曲时，其不同区域的驱动电极图案101与检测电极图案102的之间的互感电容差呈反向变化。
在实际的应用中，考虑到空间的利用、工艺的简化、触控的灵敏度等，将触控面板100中的驱动电极图案101和检测电极图案102分别呈菱形、正方形或长方形，且两者的边彼此平行；驱动电极图案101和检测电极图案102彼此交错设置，驱动电极图案101与至少两个检测电极图案102相邻，且驱动电极图案101与一部分相邻的检测电极图案102之间的距离设置为小于预定距离Dt，与另一部分相邻的检测电极图案102之间的距离设置为大于预定距离Dt。
请参阅图7，图7是本发明可挠式触控面板第二实施例的结构示意图。本实施例提供一种可挠式触控面板200，包括多个驱动电极图案201和多个检测电极图案202，其中驱动电极图案201为多边形电极图案，检测电极图案202为圆弧形电极图案，检测电极图案202围绕驱动电极图案201设置，这种结构的设计使得边到圆弧的距离有渐变的趋势。
类似于第一实施例中的可挠式触控面板100，本实施例的触控面板200中也包括驱动电极图案201与相邻的检测电极图案202之间的距离Dc小于预定距离Dt的c区域，以及驱动电极图案201与相邻的检测电极图案202之间的距离Dd大于预定距离Dt的d区域。在本实施例中，由于驱动电极图案201的边到检测电极图案202的圆弧间的距离为逐渐变化的，因此将多边形图案的边的端点与圆弧形图案之间的距离Dc设置为小于预定距离Dt，且多边形电极图案的边的中心点之间的距离Dd大于预定距离Dt。同理，在触控面板200发生弯曲时，Dc及Dd同时增大（减小），则Dc相应的ΔCmc增大（减小），Dd相应的ΔCmd减小（增大），ΔCmc与ΔCmd呈反向变化，变化相互抵消，减小弯曲时触控面板200整体的ΔCm变异。
本实施例中为了保证整个触控面板200的均匀及稳定，多边形电极图案为正八边形，圆弧形电极图案为圆形，且多边形电极图案及圆弧形电极图案同心设置。
以此实施例为基础，容易得知，在其他实施例中，可将驱动电极图案201设置为圆弧形电极图案，检测电极图案202设置为多边形电极图案，多边形图案也可以为三角形、四边形甚至十二边形等，当然边数越多，多边形图案也越趋近于圆形，将不利于距离的设计。
区别于现有技术，本发明可挠式触控面板包括多个驱动电极图案和多个检测电极图案，当不存在触控动作时，驱动电极图案及检测电极图案之间存在一个互感电容，而当存在触控动作时，驱动电极图案及检测电极图案之间产生另一互感电容，两互感电容之间产生的差值为互感电容差，然而当可挠式触控面板具有一定弯曲度时，驱动电极图案以及检测电极图案的距离由于弯曲等效发生变化，继而使得互感电容差也发生变异，此变异会影响到触控定位，因此将驱动电机图案和检测电极图案之间的距离设置成使得当可挠式触控面板发生弯曲时，在可挠式触控面板的不同区域，驱动电极图案与检测电极图案的之间的互感电容差呈反向变化，以使得整体的互感电容差变化较小，即减小触控面板弯曲所导致的互感电容差变异。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (10)

  1. 一种可挠式触控面板，其中，所述可挠式触控面板包括多个驱动电极图案和多个检测电极图案，其中所述驱动电极图案和所述检测电极图案之间的距离设置成使得当所述可挠式触控面板发生弯曲时，在所述可挠式触控面板的不同区域，所述驱动电极图案与所述检测电极图案的之间的互感电容差呈反向变化，其中所述互感电容差为存在触控动作时所述驱动电极图案和所述检测电极图案之间的互感电容与不存在触控动作时所述驱动电极图案和所述检测电极图案之间的互感电容之间的差值。
  2. 根据权利要求1所述的触控面板，其中，在所述可挠式触控面板的一部分区域内，所述驱动电极图案与相邻的所述检测电极图案之间的距离设置成小于预定距离，在所述可挠式触控面板的另一部分区域内，所述驱动电极图案与相邻的所述检测电极图案之间的距离设置成大于所述预定距离，所述预定距离为所述互感电容差随所述驱动电极图案和所述检测电极图案之间距离的变化曲线中的最大互感电容差所对应的距离值。
  3. 根据权利要求2所述的触控面板，其中，所述驱动电极图案和所述检测电极图案彼此交错设置，且每一所述驱动电极图案与至少两个检测电极图案相邻设置，其中所述驱动电极图案与一部分相邻设置的所述检测电极图案之间的距离设置小于所述预定距离，所述驱动电极图案与另一部分相邻设置的所述检测电极图案之间的距离设置大于所述预定距离。
  4. 根据权利要求3所述的触控面板，其中，所述驱动电极图案和所述检测电极图案分别呈菱形设置，且所述驱动电极图案的边和所述检测电极图案的边彼此平行。
  5. 根据权利要求2所述的触控面板，其中，所述驱动电极图案和所述检测电极图案中的一者为多边形电极图案，而所述驱动电极图案和所述检测电极图案中的另一者为圆弧形电极图案，其中所述圆弧形电极图案环绕于所述多边形电极图案，其中所述多边形电极图案的边的端点与所述圆弧形电极图案之间的距离小于所述预定距离，而所述多边形电极图案的边的中心点之间的距离大于所述预定距离。
  6. 根据权利要求5所述的触控面板，其中，所述多边形电极图案和所述圆弧形电极图案彼此同心设置。
  7. 一种可挠式触控面板，其中，所述可挠式触控面板包括多个驱动电极图案和多个检测电极图案，其中所述驱动电极图案和所述检测电极图案彼此交错设置，且每一所述驱动电极图案与至少两个所述检测电极图案相邻设置，其中所述驱动电极图案与一部分相邻设置的所述检测电极图案之间的距离设置不等于所述驱动电极图案与另一部分相邻设置的所述检测电极图案之间的距离。
  8. 根据权利要求7所述的触控面板，其中，所述驱动电极图案与一部分相邻设置的所述检测电极图案之间的距离设置小于所述预定距离，所述驱动电极图案与另一部分相邻设置的所述检测电极图案之间的距离设置大于所述预定距离，其中所述预定距离为互感电容差随所述驱动电极图案和所述检测电极图案之间距离的变化曲线中的最大互感电容差所对应的距离值，所述互感电容差为存在触控动作时所述驱动电极图案和所述检测电极图案之间的互感电容与不存在触控动作时所述驱动电极图案和所述检测电极图案之间的互感电容之间的差值。
  9. 一种可挠式触控面板，其中，所述可挠式触控面板包括多个驱动电极图案和多个检测电极图案，所述驱动电极图案和所述检测电极图案中的一者为多边形电极图案，而所述驱动电极图案和所述检测电极图案中的另一者为圆弧形电极图案，所述圆弧形电极图案环绕于所述多边形电极图案，所述多边形电极图案和所述圆弧形电极图案彼此同心设置。
  10. 根据权利要求9所述的触控面板，其中，所述多边形电极图案的边的端点与所述圆弧形电极图案之间的距离小于预定距离，而所述多边形电极图案的边的中心点之间的距离大于预定距离，所述预定距离为互感电容差随所述驱动电极图案和所述检测电极图案之间距离的变化曲线中的最大互感电容差所对应的距离值，所述互感电容差为存在触控动作时所述驱动电极图案和所述检测电极图案之间的互感电容与不存在触控动作时所述驱动电极图案和所述检测电极图案之间的互感电容之间的差值。
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