CN103699278B - Self-capacitance and self capacitance change detection method for a touch screen sensing means - Google Patents

Self-capacitance and self capacitance change detection method for a touch screen sensing means Download PDF

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CN103699278B
CN103699278B CN201310497442.7A CN201310497442A CN103699278B CN 103699278 B CN103699278 B CN 103699278B CN 201310497442 A CN201310497442 A CN 201310497442A CN 103699278 B CN103699278 B CN 103699278B
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electrode
capacitance
self
electrodes
charge
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CN103699278A (en
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莫良华
刘卫平
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敦泰电子有限公司
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Abstract

本发明提出用于触摸屏的自电容变化检测方法及自电容传感装置,所述自电容传感装置包括矩形电极,以及设置有变量采集模块的自电容变化检测单元。 The present invention proposes a method of detecting a change in self-capacitance and self-capacitance touch screen sensing means, the self-capacitance sensing means includes a rectangular electrode, and provided variables collected from the capacitance change detecting unit modules. 变量采集模块包括电连接于第一节点的恒流源、钳位电路和电荷收发检测电路,以及接地的第二节点。 Variable acquisition module comprises a first node electrically connected to the constant current source, clamp circuit and a transceiver charge detection circuit, and a second node to ground. 在针对一个电极的检测过程中,所述变量采集模块的第一节点先电连接电极的第一端,且第二节点电连接电极的第二端,采集到第一自电容变化量之后,变量采集模块的第一节点再电连接该电极的第二端,且第二节点电连接电极的第一端,以采集第二自电容变化量。 After the detection process for one of the electrodes, the variable node acquisition module of the first terminal is electrically connected to a first electrode and a second terminal electrically connected to the second node electrode, a first collected from the capacitance variations, variable acquisition module and then the first node is electrically connected to the second terminal electrode and the second electrode is electrically connected to a first point terminal to acquire a second self-capacitance variation. 本发明所述自电容传感装置具有上产工艺简单,生产效率高,电极可靠性好、不易断裂,适用电极材料广泛,以及抗静电释放ESD性能好的特点。 The present invention has a simple production process, high production efficiency, reliability electrodes, easily broken, is widely used electrode materials, antistatic and good ESD performance characteristics release from the capacitive sensing device.

Description

用于触摸屏的自电容变化检测方法及自电容传感装置 Self-capacitance and self capacitance change detection method for a touch screen sensing means

技术领域 FIELD

[0001] 本发明涉及传感信号的检测方法及实现该方法的装置,特别是涉及用于触摸屏的、将触碰信息转换为自电容变化量的方法及实现该方法的装置。 [0001] The present invention relates to apparatus and method for detecting sensing signals implementing the method, particularly relates to a touch screen, the touch from the capacitance change amount to a method and apparatus for converting information of the implementation of the method.

背景技术 Background technique

[0002] 自电容触摸屏作为电容式触摸屏的一种,以自电容传感装置为基础。 [0002] as a self-capacitance touch screen capacitive touch screen, a self capacitance based sensing device. 该电容传感装置将对触摸屏的触碰信息转换为自电容变化信号,并根据自电容变化信号确定触碰位置坐标。 The capacitive sensing touch information of the touch screen device will convert the signal from the capacitance change, and the touch position coordinates determined in accordance with the signal from the capacitance change. 所述自电容传感装置不仅可以用于制造独立的触摸屏,还可以结合应用在相关设备中,例如将自电容传感装置结合在显示设备上,制成触摸显示屏。 The self capacitance sensing means for producing not only independent of the touch screen, may also be applied in conjunction with the associated device, for example, in conjunction with self-capacitance sensing means on the display device, made of a touch screen. 所述自电容传感装置由于其只需要单层布局布线,生产工艺简单,良率高,成本低,在智能机和平板电脑上得到了越来越广泛的应用。 The self-capacitance sensing means since it requires only a single-layer layout, the production process is simple, good rate, low cost, has been more widely used in intelligent and tablets. 现有技术单层自电容传感装置的电极布置结构图如图12所示,采用三角形或者类三角形的电极91,各电极91成对设置成互补的电极对92,各电极对92重复堆叠而布满整个触摸屏或者显示屏的屏体。 Since the prior art single electrode capacitive sensing device arrangement of FIG. 12, a triangular or triangle-like electrodes 91, 91 arranged in pairs in a complementary electrode each electrode pair 92, each electrode 92 is repeated stacking whole body covered with screen or touch screen display. 从图12所示电极布置结构中就可以明显看出,各电极91之间没有交叉走线的情况,令生产工序较为简单。 It can be apparent from the electrode arrangement shown in FIG. 12, the intersection of no traces between the electrode 91, so that the production process is relatively simple. 现有技术自电容传感装置还包括电连接各电极91的自电容检测单元。 Prior art self-capacitance sensing means further comprises a self-capacitance of each electrode is electrically connected to the detection unit 91.

[0003] 图13和图14示出自电容检测的基本原理。 [0003] FIGS. 13 and 14 show the basic principle of detection by the capacitance. 在电极91上通常覆盖一层用透明绝缘介质材料制成的盖板93。 On the electrode layer 91 is typically covered with a transparent plate 93 made of a dielectric material. 自电容传感装置的自电容,即电极91到地的电容,如图13所示的Cp。 Since self-capacitance of the capacitive sensing device, i.e., the capacitor electrode 91 to ground, as shown in FIG. 13 Cp. 当人体94触摸到盖板93上时,由于人体近似于一个大地,相当于电极91上的又并联了一个到地的电容Cf,从而令电极91到地的自电容增加,如图13和图14所示。 When the human body 94 touches the cover plate 93, similar to a human body because the earth, and is equivalent to a capacitance Cf in parallel with the ground electrode 91, so that the electrode 91 from the capacitance to ground increases, as shown in FIG 13 and FIG. 14 FIG. 通过侦测自电容变化情况,可以判断出是否发生触摸。 By detecting the case of self-capacitance change, whether a touch occurred can be judged.

[0004] 如图12所示,长底边位于左侧的电极91按911L、912L、…、91(M-1)L、91ML、91(M+ 1儿、~编号,长底边位于右侧的电极91按9111?、9121?、."、91(]\1-1)1?、91]\©、91(]\1+1)1^"编号,M代表一自然数。相同数字编号的两电极91构成一电极对,例如,编号是9IML与9IMR的电极91构成电极对。当发生触摸时自电容检测单元通过检测各电极91的自电容变化量。触摸点99引起六个电极91发生自电容变化,它们的编号分别是91(M - 1)L、91ML、91(M+1)L、91 (]«-1)1?、91]\©和91(]\1+1)1?。相应地自电容变化量分别是0?1、0?2、0?3、0?4、0?5和0?6。首先找出纵向方向上变化量最大的通道为触摸发生的通道,即变化量是Dp2、编号是91ML对应电极91的通道,结合其上下通道的变化量,求出其重心位置,即为触摸点的纵轴坐标;通过变化量最大的通道及其对面三角形电极变化量的比值,得出横轴方向上的坐标。 [0004] As shown, a long base electrode 91 by the left side 911L, 912L, ..., 91 (M-1) L, 91ML, 91 (M + 1 child, ~ number, located on the right side of the long base 12 the electrode 91 by 9111?, 9121?,. ", 91 (] \ 1-1) 1?, 91] \ ©, 91 (] \ 1 + 1) 1 ^" number, M represents a natural number is the same figures the two electrodes 91 constituting a pair of electrodes, e.g., electrode configuration code is 9IML 9IMR of the electrodes 91 when the touch occurs from the capacitance detection unit. 99 touch point caused by the self-six electrodes 91 to detect the capacitance variation of electrode 91 since the capacitance changes, their numbers are 91 (M - 1) L, 91ML, 91 (M + 1) L, 91 (] «- 1)? 1, 91] \ © and 91 (] \ 1 + 1 ) 1 ?. corresponding capacitance variation are from 0? 1,0? 2,0? 3,0? 4,0? 5 and 0? 6, first find the maximum amount of change in the channel longitudinal direction of the touch occurs channel, i.e., the amount of change is Dp2, the corresponding channel number is 91ML electrode 91, combined with the variation of the vertical channels, which determine the position of the center of gravity, i.e. the vertical axis coordinate of the touch point; the maximum amount of change of the channel and its opposite the ratio of the amount of change triangular electrode obtained coordinates in the horizontal axis direction.

[0005] 现有技术自电容传感装置还存在以下的缺陷和不足之处: [0005] Since the prior art capacitive sensing device further has the following defects and deficiencies:

[0006] 1.生产工艺复杂;现有技术自电容传感装置的电极91,在实际生产中一般都无法做出真正的三角形,而以类三角形的梯形代替;为了在X轴方向上获得比较好的精度,通常要求梯形窄的一边,例如图12所示编号是911L的电极91的右侧,宽度越小越好,通常要求在0.3mm甚至更小,这对工艺能力有一定要求,成为影响生产成本降低的因素之一; [0006] 1. The production process is complicated; electrode prior art self-capacitance sensing means 91, in the actual production are generally unable to make a real triangular, trapezoidal and triangular place class; in order to obtain the X-axis direction in comparison good precision, usually requires a narrow side of the trapezoid, for example, numbers shown in FIG. 12 is a right side 911L of the electrode 91, the width as small as possible, generally even smaller in claim 0.3mm, this process has certain requirements for capacity, as one of the factors affecting the production cost reduction;

[0007] 2.生产工序多;传统结构的最小检测单元是一对三角形,而且为了改善画线线性度,还会把每个三角形拆成两个或更多个小三角形并联,这样的电极结构,对于激光工艺来说,需要切割很多次,成为又一个影响生产成本降低的因素; [0007] 2. Multi-step production; minimum detection means is a pair of conventional triangular configuration, and in order to improve the linearity of the objects, but also each of the triangle is split into two or more small triangles in parallel, such an electrode structure for laser technology, the need to cut a lot of times, it becomes a factor in the production costs of the impact;

[0008] 3.对于采用软性基材的触摸屏模组,例如用薄膜材料制成基材,如果在这种基材上采用现有技术自电容传感装置的电极91,由于三角形电极91的尖端很细,在生产、运输、 测试过程中如果基材发生弯折,可能会导致电极区用于制造电极的透明导电材料,例如氧化铟锡Indium Tin Oxide发生断裂,而使得自电容传感装置,乃至触摸屏损坏;所述三角形电极91的易损结构也是影响生产成本降低的因素; [0008] 3. For the soft touch screen module substrate, for example a film base material, if employed in the prior art such substrates from the capacitive sensing device electrode 91, since the electrode 91 of the triangular very fine tip, production, transportation, if the substrate is bent during testing occurred, may lead to a transparent conductive electrode region for an electrode material such as indium tin oxide indium tin oxide broken, so that the self-capacitance sensing means , and even damage to the touch screen; fragile structures of the triangular electrode 91 is also a factor in reducing the production cost of the influence;

[0009] 4.电极材料要求高;对于一些新型制造电极91的材料,例如金属网metal mesh材料,为了保证构成金属网的金属丝之间搭接良好,电极91的最小宽度会比现有的氧化铟锡ITO材料大,应当在Imm以上,该最小宽度对于将现有技术三角形电极91用于制造自电容传感装置很难接受; [0009] 4. The electrode material for high; number of new materials for manufacturing the electrode 91, such as a metal mesh metal mesh material, a good overlap in order to ensure between the wire constituting the metal mesh, the minimum width of the electrode 91 than conventional ITO, indium tin oxide material having a large, Imm, should be more than, the minimum width for the prior art for manufacturing a triangular electrode 91 is difficult to accept a self-capacitance sensing means;

[0010] 5.抗静电释放Electro-static Discharge性能差;对于现有主流的透明导电材料氧化铟锡ITO,其阻抗较大,如果发生静电释放ESD事件,在氧化铟锡ITO宽度较小的区域, 例如宽度在0.1mm以下,比较容易发生静电释放ESD,导致氧化铟锡ITO电极间短路。 [0010] The antistatic discharge Electro-static Discharge performance difference; conventional mainstream for a transparent conductive material, indium tin oxide ITO, its impedance is large, if the electrostatic discharge ESD event occurs, indium tin oxide ITO smaller width region , for example, 0.1mm or less in width, more prone to electrostatic discharge ESD, lead, indium tin oxide ITO electrode between the short-circuited.

发明内容 SUMMARY

[0011] 本发明要解决的技术问题在于避免现有技术的不足之处而提出一种用于触摸屏的自电容变化检测方法,以及应用该方法的自电容传感装置,通过改进电极结构,采用新的自电容检测方法,令自电容传感装置的生产成本降低,提升其总体性能。 [0011] The present invention is to solve the technical problem is to avoid the shortcomings of the prior art proposed self-capacitance change detection method for a touch screen, and a self-capacitance sensing apparatus application of the method, by improving an electrode structure, using the new self-capacitance detection method, so that the production cost is reduced from the capacitance sensing means, to enhance its overall performance.

[0012] 本发明解决所述技术问题可以通过采用以下技术方案来实现: [0012] The present invention solves the technical problem may be achieved by the following technical solutions:

[0013] 提出一种用于触摸屏的自电容变化检测方法,基于自电容传感装置,该自电容传感装置包括至少一电极。 [0013] proposed a self-capacitance change detection method for a touch panel, based on self capacitance sensing means, the self-capacitance sensing means comprises at least one electrode. 所述电极包括在沿第一方向的第一端和第二端。 The electrode comprises a first direction along a first end and a second end. 所述方法针对每个电极执行以下步骤, The method performs the following steps for each electrode,

[0014] A.在电极的第一端电连接恒流源、钳位电路和电荷收发检测电路,将该电极的第二端接地;所述恒流源向电极输出恒定电流值的电流;所述钳位电路令所电连接电极的一端的电位限定于恒定电位;所述电荷收发检测电路能够输出电荷或者接收电荷,并检测电荷输出量或者接收量,量化电荷输出量为自电容变化量; [0014] A. at a first end electrically connected to a constant current source electrode, a transceiver and a charge clamp circuit detecting circuit, the second terminal of the electrode; electrode to the constant current source outputs a constant current value of the current; the said clamping circuit to make the electric potential at one terminal connected to a constant potential defining electrode; the charge detecting circuit can output the transceiver receives the charge or charge, and detect or receive an amount of output charge, the amount of the charge output from the quantization capacitance variations;

[0015] B.电荷收发检测电路检测是否有电荷输出; If [0015] B. transceiver charge detection circuit for detecting the charge output;

[0016] 如果有电荷输出,则量化电荷输出量为第一自电容变化量,随后执行步骤C; [0016] If the output of the charge, the charge output from the quantization of the first capacitor variation, then executing step C;

[0017] 如果没有电荷输出,直接执行步骤E; [0017] If there is no charge output, perform Step E;

[0018] C.在电极的第二端电连接恒流源、钳位电路和电荷收发检测电路,将该电极的第一端接地; [0018] C. at the end of the second electrode is electrically connected to the constant current source, clamp circuit and a transceiver charge detection circuit, the first grounded electrode;

[0019] D.电荷收发检测电路量化电荷输出量为第二自电容变化量; [0019] D. transceiver charge detection circuit to a second quantization output from the charge amount of capacitance change;

[0020] E.针对所述电极的自电容变化检测结束。 [0020] E. for electrode from the capacitance change detection end.

[0021] 具体而言,步骤A所述恒流源向电极输出的恒定电流值是I,所述钳位电路令所电连接电极的一端的电位限定的恒定电位是VI,那么应当满足V1/I=R,R是钳位电路和恒流源所电连接电极的电阻。 [0021] Specifically, Step A to the constant current source is a constant current value of the output electrodes I, the potential of the electrode is electrically connected to one end of the clamp circuit so that the constant potential is defined Vl, it should satisfy V1 / I = R, R is the resistance of the connection electrode clamp circuit and a constant current power source.

[0022]本发明解决所述技术问题还可以通过采用以下技术方案来实现: [0022] The present invention solves the technical problem may also be achieved by the following technical solutions:

[0023]设计、制造一种用于触摸屏的自电容传感装置,包括至少一电极,以及电连接各电极的自电容变化检测单元。 [0023] design, manufacturing apparatus for a self-capacitance touch sensor panel, comprising at least one electrode, and a self-capacitance change detecting unit electrically connected to the electrodes. 所述电极呈矩形,包括用于电连接自电容变化检测单元的、沿该电极延伸方向的第一端和第二端。 The electrode has a rectangular shape, comprising means for electrically connecting the self-capacitance change detecting means, along the extending direction of the first electrode and second ends. 所述自电容变化检测单元包括至少一变量采集模块。 Since the capacitance change detecting unit comprises at least a variable acquisition module. 该变量采集模块包括电连接于第一节点的恒流源、钳位电路和电荷收发检测电路,以及接地的第二节点。 The collection module includes a variable node is electrically connected to a constant current source, clamp circuit and a transceiver charge detection circuit, and a second node to ground. 在针对一个电极的检测过程中,所述变量采集模块的第一节点先电连接电极的第一端,且第二节点电连接电极的第二端,采集到第一自电容变化量之后,变量采集模块的第一节点再电连接该电极的第二端,且第二节点电连接电极的第一端,以采集第二自电容变化量。 After the detection process for one of the electrodes, the variable node acquisition module of the first terminal is electrically connected to a first electrode and a second terminal electrically connected to the second node electrode, a first collected from the capacitance variations, variable acquisition module and then the first node is electrically connected to the second terminal electrode and the second electrode is electrically connected to a first point terminal to acquire a second self-capacitance variation. 所述钳位电路将所电连接电极一端的电位限定在恒定电位,所述恒流源向所电连接电极提供恒定电流;所述电荷收发检测电路因其所电连接电极的自电容变化向该电极输出电荷,并检测电荷输出量,量化电荷输出量为自电容变化量。 The said clamping circuit electrically connected to the potential of the electrode is defined in one end of a constant potential, said electrode being connected to a constant current source provides a constant current to the power; the electrical charge from the capacitor to change its transceiver detecting circuit connecting the electrodes output charge electrodes and detects charge output, an amount of the charge output from the quantization capacitor variation.

[0024] 所述钳位电路将所电连接电极一端的电位限定的恒定电位是VI,所述恒流源向所电连接电极提供的恒定电流是I,那么应当满足V1/I = R,R是钳位电路和恒流源所电连接电极的电阻。 [0024] The clamp circuit connected to a constant potential of the potential defining electrode is an end of the electric VI, the constant current source provides a constant current electrode is electrically connected to the I, it should satisfy V1 / I = R, R is the resistance of the connection electrode clamp circuit and a constant current power source.

[0025] 具体而言,所述钳位电路包括一运算放大器,该钳位电路所限定的恒定电位由该运算放大器正向输入端的输入电压控制。 [0025] Specifically, the clamp circuit comprises an operational amplifier, the clamping circuit constant potential defined by the positive input voltage from the control terminal of the operational amplifier. 所述电荷收发检测电路包括所述用作钳位电路的运算放大器,电连接在该运算放大器反相输入端与输出端之间的电荷收发电容,以及电连接所述运算放大器的输出端的交直流转换子模块。 The charge detection circuit comprising a transceiver as an operational amplifier clamping circuit electrically connected between the inverting input terminal of the operational amplifier and the output terminal of the charge capacitor transceiver, and electrically connected to the DC output terminal of the operational amplifier conversion sub-module. 所述恒流源的电流输出端和运算放大器的反相输入端都电连接于第一节点。 Inverting input terminal of the operational amplifier and the current output terminal of the constant current source are electrically connected to the first node.

[0026] 为了在每次检测后复位电路状态,在所述电荷收发电容的两端之间还电连接有复位开关。 [0026] In order to reset the circuit after each detection of the state, between both ends of the capacitor charge transceiver is further electrically connected to the reset switch.

[0027] -种电极的具体结构是,所述电极的至少一个顶角被切除形成直线段斜边,从而电极被加工成带有斜边的矩形电极。 [0027] - species specific electrode configuration that the electrode is formed at least one apex is cut oblique straight line segments, so that the electrodes are processed into a rectangular electrode having a beveled edge.

[0028] 另一种电极的具体结构是,所述电极的至少一个顶角被切除形成圆弧边,从而电极被加工成带有圆弧边的矩形电极。 [0028] Another particular electrode structure, the electrode is formed at least one arcuate edge apex is cut, so that the electrodes are processed into an electrode with a rectangular annular edge.

[0029] 还有一种电极的具体结构是,所述电极的至少一条边加工有至少两个凹槽,在两相邻两凹槽之间形成凸齿,从而电极被加工成带有锯齿边的矩形电极。 [0029] There is a specific structure of an electrode, at least one side of said working electrode has at least two grooves formed between two adjacent teeth in the two grooves, so that the electrode is processed into a ragged edge rectangular electrodes.

[0030] 具体应用中,所述电极用氧化铟锡、金属网或者碳纳米材料制成。 [0030] In particular applications, the electrode is made of indium tin oxide, a metal mesh or a carbon nanomaterial.

[0031] 关于电极的设置,所述自电容传感装置还包括用树脂合成薄膜材料或者用玻璃制成的基板,所述电极附着在该基板上。 [0031] disposed about the electrode, the self-capacitance sensing means further comprises a synthetic resin film material or the substrate made of glass, the electrodes are attached on the substrate.

[0032]当自电容传感装置与显示设备结合时,所述自电容传感装置安装在液晶显示屏内。 [0032] When the self-capacitance sensing device in conjunction with a display device, the self-capacitance sensing means is mounted in a liquid crystal display. 该液晶显示屏包括第一液晶基板和第二液晶基板,以及夹在第一液晶基板与第二液晶基板之间的液晶材料、像素电极、彩色滤光层和黑矩阵。 The liquid crystal display comprising a first substrate and a second liquid crystal substrate, and liquid crystal sandwiched between the first substrate and the second substrate, liquid crystal material, a pixel electrode, a color filter layer and the black matrix. 所述电极附着在所述第一液晶基板的上层或者下层,或者第二液晶基板的上层或者下层。 An upper layer or a lower layer of the first liquid crystal substrate, or the upper or lower layer of the second electrode is adhered to the liquid crystal substrate.

[0033] -种电极扫描检测方式,所述自电容变化检测单元包括一套变量采集模块;该套变量采集模块受控地按照设定的时序依次电连接所述各电极,即分时地电连接各电极以完成对各电极的自电容变化检测。 [0033] - seed electrode scanning detection methods, the self-capacitance change detecting means comprises a variable acquisition module; acquisition module of the set variable controlled in accordance with the timing set sequentially electrically connecting the respective electrodes, i.e. electrically sharing connecting each electrode to complete the detection of a change in self-capacitance of each electrode.

[0034]另一种电极扫描检测方式,所述变量采集模块的数量少于电极的数量;各变量采集模块受控地按照设定的时序依次一对一地电连接所有电极中的部分电极,即分时分区域地电连接各电极以完成对各电极的自电容变化检测。 [0034] Another way of detecting a scanning electrode, the variable is less than the number of collecting electrode module; controlled variables collection module is set in accordance with the timing of sequentially electrically connected to one electrode of all partial electrodes, i.e., divisional subregion electrically connected to each electrode to complete the detection of a change in self-capacitance of each electrode.

[0035]还可以用一对一的电极扫描检测方式,所述变量米集模块一对一地电连接所述电极。 [0035] The electrodes may also be used one scan detection mode, the current block variable is one meter to electrically connect the electrodes.

[0036] 当自电容传感装置与显示设备结合时,所述自电容传感装置安装在液晶显示屏内。 [0036] When the self-capacitance sensing device in conjunction with a display device, the self-capacitance sensing means is mounted in a liquid crystal display. 该液晶显示屏由显示驱动电路芯片控制。 The chip control circuit driven by the LCD display. 所述自电容变化检测单元集成在所述显示驱动电路芯片内。 Since the capacitance change detecting unit is integrated within the display drive circuit chip.

[0037] 当自电容传感装置与显示设备结合时,为了协调液晶驱动与自电容检测,所述自电容传感装置还包括协调检测模块。 [0037] When the self-capacitance sensing means in conjunction with the display device, the liquid crystal driving in order to coordinate detection and self-capacitance, the capacitance sensing means from the detection module further comprises a coordination. 所述自电容传感装置安装在液晶显示屏内。 The self capacitance sensing means is mounted in a liquid crystal display. 该液晶显示屏由显示驱动电路控制。 The LCD display is controlled by the drive circuit. 所述协调检测模块电连接所述自电容变化检测单元和显示驱动电路,以令自电容变化检测单元和显示驱动电路互不干扰地分时段和/或分区域完成各自功能。 The coordinate detecting module is electrically connected to the self-capacitance change detecting unit and a display driving circuit, in order to make self-capacitance change detection unit and the sub-display driving circuit without mutual interference period and / or sub-region of their respective functions.

[0038] 本发明解决所述技术问题又可以通过采用以下技术方案来实现: [0038] The present invention solves the technical problem and can be realized by the following technical solutions:

[0039] 作为所述用于触摸屏的自电容变化检测方法在数据处理方面的延伸,提出一种触碰点坐标数据处理方法,基于权利要求16所述的用于触摸屏的自电容变化检测方法,所述各电极沿垂直于第一方向的第二方向依序排布,其特征在于所述方法包括: [0039] As an extension of the self-capacitance change detecting method for a touch screen in the data processing, to provide a touch point coordinate data processing method as claimed in claim based on self-capacitance change detection method for a touch panel of claim 16, said electrodes are arranged sequentially in a direction perpendicular to the first direction, the second direction, wherein said method comprises:

[0040] F.当一个触碰点令K个电极的自电容发生变化时,获取到涉及该触碰点的K对自电容变化量,即2K个自电容变化量; [0040] F. When a touch point so that the K electrodes from change in the capacitance, obtained K relates the touch point from the capacitance variation, i.e., a self-capacitance variation 2K;

[00411 G.选择2K个自电容变化量中最大的一个; [00411 G. 2K select a self-capacitance of a largest amount of change;

[0042]该最大自电容变化量所属电极是沿第二方向的第T个电极,该最大自电容变化量是所述第T个电极的第一自电容变化量,即DTU,第T个电极的另一个自电容变化量是该电极的第二自电容变化量,即DTV, The first electrode T [0042] The maximum change amount of self-capacitance electrode belongs to a second direction, which is the maximum amount of change of the self-capacitance of the T of the first electrode from the capacitance variation, i.e. the DTU, the first electrode T another variation of the self-capacitance of the second capacitor from the variation of the electrode, i.e., a DTV,

[0043]从而第T个电极沿第二方向两侧电极各自的第一自电容变化量分别是D(T+1)U,D (T+2)U,…,D(T+W1)U,以及D(T-1)U,D(T-2)U,…,D(T-W2)U;第二自电容变化量分别是D(T+ 1)V,D(T+2)V,…,D(T+W1)V,以及D(T-1)V,D(T-2)V,…,D(T-W2)V,W1+W2+1=K; [0043] such that the respective sides of the first electrode from the capacitance variations of the first electrode along the second direction T are D (T + 1) U, D (T + 2) U, ..., D (T + W1) U , and D (T-1) U, D (T-2) U, ..., D (T-W2) U; second self capacitance variations are D (T + 1) V, D (T + 2) V , ..., D (T + W1) V, and D (T-1) V, D (T-2) V, ..., D (T-W2) V, W1 + W2 + 1 = K;

[0044] H.若各电极沿第一方向的长度是XO,沿第二方向的长度是YO,那么步骤A所述触碰点沿第二方向坐标Y是, [0044] H. If the length of each electrode in the first direction is XO, the length in the second direction is YO, then step A the touch point coordinate in the second direction Y is

[0045] [0045]

Figure CN103699278BD00081

[0046] 步骤A所述触碰点沿第一方向横向坐标X是, [0046] A step of the touch point along the first direction X transverse coordinate is

[0047] [0047]

Figure CN103699278BD00082

[0048] 同现有技术相比较,本发明"用于触摸屏的自电容变化检测方法及自电容传感装置"的技术效果在于: [0048] Compared with the prior art, the present invention is "self-capacitance change detection method for a touch screen and a self-capacitance sensing means," the technical effect:

[0049] 1.生产工艺简单;本发明电极形状为矩形,电极纵向宽度比较宽,降低了对工艺精度的要求,能够减少生产成本; [0049] 1. The production process is simple; an electrode shape of the present invention is a rectangular, relatively wide longitudinal electrodes, reducing the requirements for the accuracy of the process, the production cost can be reduced;

[0050] 2.生产效率高;本发明电极形状采用矩形结构,最小检测单元只要切割一刀即可完成,生广效率尚; High [0050] 2. Production efficiency; rectangular shape of the electrode structure of the present invention, as long as the minimum detection means to complete the cutting knife, still Shengguang efficiency;

[0051] 3.可靠性好,不易断裂;本发明电极采用矩形结构,宽度值比较大,即使电极所附着基材用软性材料制成,基材弯折时电极也不易断裂; [0051] 3. reliability, easy to break; rectangular electrode structure of the present invention, a relatively large width value, even if the electrode substrate is attached is made of a soft material, when the electrode substrate is not easily bent fracture;

[0052] 4.对材料要求低;本发明电极采用矩形结构,其最小宽度值较大,令电极能够采用金属网metal mesh新材料制成; [0052] 4. Low demands on the materials; rectangular electrode structure of the present invention, the minimum value is larger width, so that the electrodes can be metal mesh metal mesh new material;

[0053] 5 .抗静电释放ESD性能好;现有主流的电极制造材料氧化铟锡ITO,抗静电释放ESD能力随着宽度降低而降低,本发明中电极的宽度值比较大,抗静电释放ESD能力比较强。 . [0053] 5 good antistatic discharge ESD performance; existing mainstream manufacturing an electrode material such as indium tin oxide ITO, antistatic discharge ESD capability decreases with decreasing width, the width of the electrode of the present invention is relatively large, antistatic discharge ESD capacity is relatively strong.

附图说明 BRIEF DESCRIPTION

[0054] 图1是本发明自电容传感装置的电极布置结构示意图; [0054] FIG. 1 is a schematic diagram of the present invention from the electrode arrangement of a capacitive sensing means;

[0055] 图2是本发明自电容传感装置的电原理示意图; [0055] FIG. 2 is a schematic view of the present invention, since an electrical schematic of a capacitive sensing means;

[0056] 图3是本发明自电容传感装置在发生触碰时第一自电容变化量检测的电原理示意图; [0056] FIG. 3 is a schematic view of the present invention, since the principle of capacitive electrical sensing means when the touch occurs from the first capacitance variation detected;

[0057] 图4是本发明自电容传感装置在发生触碰时第二自电容变化量检测的电原理示意图; [0057] FIG. 4 is a schematic diagram electrical schematic of the present invention from the capacitive touch sensing device when the occurrence of a second self-capacitance variation detected;

[0058] 图5是本发明自电容传感装置的实施例的电原理示意图; [0058] FIG. 5 is a schematic view of the present invention from the principles of the embodiments of the capacitive electrical sensing device;

[0059] 图6是本发明带有斜边的矩形电极101的结构示意图; [0059] FIG. 6 is a schematic view of a rectangular oblique electrode 101 with the present invention;

[0060] 图7是本发明带有圆弧边的矩形电极102的结构示意图; [0060] FIG. 7 is a schematic view of the rectangular electrodes 102 of the annular edge with the present invention;

[0061 ]图8是本发明带有锯齿边的矩形电极103的结构示意图; [0061] FIG. 8 is a schematic view of a rectangular electrode structure 103 of the serrations of the present invention having;

[0062]图9是用金属网metal mesh制成的电极10的结构示意图; [0062] FIG. 9 is a schematic structural diagram of a metal mesh made of a metal mesh electrode 10;

[0063]图10是用一套变量采集模块分时检测各电极10的实例电原理示意图; [0063] FIG. 10 is an electrical schematic diagram showing an example of each collecting electrode module 10 with a variable division detection;

[0064]图11是液晶显示屏的横截面结构示意图; [0064] FIG. 11 is a cross-sectional structural diagram of the liquid crystal display screen;

[0065] 图12是现有技术单层自电容传感装置的电极布置结构示意图; [0065] FIG. 12 is a schematic view of the prior art single layer from the electrode arrangement of a capacitive sensing means;

[0066] 图13是现有技术自电容传感装置在发生触碰时的自电容示意图; [0066] FIG. 13 is a schematic of a prior art self-capacitance sensing means from capacitive touch occurs at the time;

[0067]图14是现有技术自电容传感装置在发生触碰时的等效电原理示意图。 [0067] FIG. 14 is a schematic diagram of an equivalent electrical schematic of the prior art self-capacitance sensing means in the event of touching.

具体实施方式 Detailed ways

[0068]以下结合附图所示实施例作进一步详述。 [0068] Example embodiments shown in the drawings for further detail below in conjunction.

[0069]本发明为了摒除现有技术三角形电极带来的生产工艺复杂、生产工序多、易折损、 电极材料要求高和抗静电释放ESD性能差的缺陷,采用矩形电极。 [0069] The present invention, in order to exclude complicated prior art to bring the triangular electrode production process, the production process more easy breakage, and an electrode material requiring high antistatic performance ESD differential release defects, rectangular electrodes. 矩形电极相比三角形电极显然生产工艺简化、减少了生产工序。 Obviously rectangular electrodes simplify the production process as compared to the triangular electrodes, reducing the production process. 矩形电极由于具有较大的纵向宽度,电极附着在软性基材上,即使基材弯折也不易折损;并且矩形电极较大的纵向宽度满足金属网metal mesh 材料对最小宽度的要求,适于用金属网材料制成电极;同样由于矩形电极具有较大的纵向宽度,也提高了电极的抗静电释放ESD性能。 Since the rectangular electrodes having a larger vertical width, electrodes are attached on the flexible substrate, even if the substrate is not easily bent impairment; rectangular electrodes and a large longitudinal width metal mesh metal mesh material satisfies the requirements for minimum width, suitable for a metal electrode formed on the mesh material; also due rectangular electrodes having a large vertical width also improves the ESD performance static drain electrode. 如图1所示,本发明提出的自电容传感装置包括矩形电极1 〇,电极1 〇按直角坐标系的横坐标方向延伸,各电极1 〇沿直角坐标系的纵坐标方向互相平行的布满整个触摸区域内。 As illustrated, the self-capacitance sensing device proposed by the invention comprises a rectangular electrodes 1 billion, a square electrode extends in the direction perpendicular to the abscissa of the coordinate system, each of the electrodes 1 square parallel to each other along the ordinate direction in a rectangular coordinate system Cloth full touch throughout the area. 当然,电极1 〇按直角坐标系的纵坐标方向延伸,各电极10沿直角坐标系的横坐标方向互相平行的布满整个触摸区域,也是一种等同的可行方案。 Of course, a square electrode extends in the direction perpendicular to the vertical axis of the coordinate system, each of the 10 covered the entire area of ​​the touch electrodes in a direction perpendicular to the abscissa of the coordinate system parallel to each other, but also a viable option equivalent. 如图1所示,为了便于后文说明,各电极10用S1、…、Sn标明了各自的编号,其中n是取值是自然数的变量,因而编号是Sn的电极10可以代表适于所有电极10的任一电极10。 1, for convenience of description hereinafter, the electrodes 10 with Sl, ..., Sn respective numbers indicated, where n is a natural number of variable values, which code is representative of Sn electrode 10 may be adapted to all of the electrodes 10, any one electrode 10. 各电极10沿延伸方向,即直角坐标系的X轴方向具有两端,电极10各自包括第一端L和第二端R,那么编号Sl的电极10就具有第一端SlL和第二端S2R,以此类推,编号是Sn的电极10包括第一端SnL 和第二端SnR。 Each electrode 10 in the extending direction, i.e. X-axis direction in a rectangular coordinate system having two ends, each electrode 10 includes a first end and a second end L R, then the number 10 on the Sl electrodes having a first end and a second end S2R SlL , and so on, the number of Sn electrode 10 includes a first end and a second end SnL SnR.

[0070]如图2所示,本发明自电容传感装置还包括电连接各电极10的自电容变化检测单元2,通过该自电容变化检测单元2实现对各电极自电容变化的检测。 [0070] As shown in FIG 2, the self-capacitance sensing means further comprises an electrical present invention since the capacitance change detecting unit 10 connected to the respective electrodes 2, the respective detection electrodes to achieve self-capacitance changed by the self-capacitance change detection unit 2. 该自电容变换检测单元2具体通过变量采集模块21完成针对与该变量采集模块21电连接的电极10的自电容变化量的侦测和采集。 The conversion from the capacitance detecting unit 2 in particular by a variable acquisition module 21 and the acquisition completion detecting capacitance variation for a self-electrode 21 is electrically connected to the acquisition module 10 is variable. 对于编号是Sn的任一电极10,电极10的第一端SnL分别连接到电荷收发检测电路211、恒流源212和钳位电路213。 For the numbering is according to any one of Sn electrode 10 are respectively connected to a first end of SnL electrode 10 to the charge detection transceiver circuit 211, a constant current source 212 and the clamp circuit 213. 电极10的第二端SnR连接地。 SnR second terminal 10 is connected to the electrode. 从而电荷收发检测电路211、恒流源212和钳位电路213都电连接于变量采集模块21的第一节点a,该变量采集模块21的第二节点b接地。 Whereby the transceiver charge detection circuit 211, a constant current source 212 and the clamp circuit 213 are electrically connected to the variable node A collection module 21, the variable node acquisition module 21 b is grounded. 恒流源212流入或流出一固定大小的电流。 A constant current source 212 current is flowing into or out of a fixed size. 钳位电路213将第一节点a, 即电极10的第一端SnL端钳位至一固定电压,电荷收发检测电路211可以流入或流出电荷, 并能检测出所流入或流出的电荷量的大小。 Clamp circuit 213 of the first node a, i.e., a first end 10 of the terminal electrode SnL clamped to a fixed voltage, the charge detecting circuit transceiver 211 may flow into or out of charge, and can detect the amount of charge into or out of the size.

[0071]钳位电路213所钳位的电压为VI,电极10两端间的电阻为R,恒流源212的电流为I, 他们之间的关系为:V1/R=I。 [0071] The clamp circuit 213 clamps the voltage VI, the resistance between both ends of the electrodes 10 is R, the constant current source 212 is I, the relationship between them is: V1 / R = I. 这样,未发生触摸的情况下,恒流源212提供的电流I刚好使得电极10的电阻连接电流源和钳位电路的第一端SnL的电压维持在VI,而不需要电荷收发检测电路211流入或流出电荷,即未发生触摸时电荷收发检测电路211检测到的电荷为0。 Thus, a case where a touch does not occur, the current I of the constant current source 212 provides a voltage such that the electrode 10 is just a resistor and a current source connected to the first end of the clamp circuit is maintained at SnL Vl, without charge detection circuit 211 flows into the transceiver charge or out of an electrical charge detection circuit 211 detects that the transceiver i.e. the touch occurs is not 0. [0072] 电极10可以等效为k个电阻1?1、1?2、1«、"_、幻、"_、1^的串联,其阻值相等,每个电阻上端节点分别为〇、1、2……k-1,最后一个电阻的下极板节点为k,节点0和k即分别为电极10 的第一端SnL和第二端SnR。 [0072] The electrode 10 can be modeled as resistors 1 k? 1,1? 2,1 «" _, phantom, "_, ​​^ 1 in series, equal in resistance, the resistance per square upper node, respectively, 1,2 ...... k-1, the last node of the resistor of the lower plate is k, i.e., node k and 0 respectively a first end and a second end SnL SnR electrode 10.

[0073]当节点0接到钳位电路213-端时,即第一节点a电连接电极10的第一端SnL,且第二节点b电连接电极10的第二端SnR时,节点0的电压为Vl,节点k接地,则节点j上的电压为: [0073] When the node 0 to the end when the clamp circuit 213-, i.e., a first node electrically connected to a first electrode terminal SnL 10, and the second node electrode b electrically connected to the second end of SnR 10, the nodes 0 voltage Vl, a ground node k, the voltage on the node j is:

[0074] [0074]

Figure CN103699278BD00101

(1)〇 (1) square

[0075]当节点k接钳位电路213-端时,即第一节点a电连接电极10的第二端SnR,且第二节点b电连接电极10的第一端SnL时,节点k的电压为Vl,节点0接地,节点j上的电压为: When [0075] When the node k when the end of the access clamp circuit 213-, i.e., a first node electrically connected to the second terminal electrode SnR 10 and second node b SnL electrically connecting the first end of the electrode 10, the voltage of the node k as Vl, a ground node 0, the voltage on node j is:

[0076] [0076]

Figure CN103699278BD00102

(2)〇 (2) billion

[0077] 当节点j发生触摸时,如图3所示,这一事件可以等效为触摸点j和地之间连接了一个电容Ct。 [0077] When a touch occurs node j, shown in Figure 3, this event can be equivalent to between touch points j and a capacitor Ct is connected.

[0078] 如图3,当电极10的第一端SnL端接钳位电路213时,即第一节点a电连接电极10的第一端SnU且第二节点b电连接电极10的第二端SnR时,由式(l),Ct上的电压为 A first end and a second node b SnU electrically [0078] As shown in FIG 3, when the first end 213 terminating SnL clamping circuit electrodes 10, i.e., a first node electrically connected to the electrode 10 is connected to the second end 10 of the electrode when SnR, by the formula (l), as the voltage on Ct

[0079] [0079]

Figure CN103699278BD00103

[0080]则Ct上将存储的电荷Ql为 [0080] Ct is stored as a charge on Ql

[0081 ] [0081]

Figure CN103699278BD00104

(3)〇 (3) billion

[0082]由于恒流源212只能提供电阻串上流过的电流,这一电荷Ql就由电荷收发检测电路211提供,并可由其量化成为第一自电容变化量。 [0082] Since only the constant current source 212 provides a current flowing through the resistor string, the charges provided by the charge Ql transceiver 211 to the detection circuit, and may be quantized by a first self-capacitance variation.

[0083]上述检测完成后,再将电极10的第一端SnL改为接地,该电极10的第二端SnR接钳位电路212,即第一节点a电连接电极10的第二端SnR,且第二节点b电连接电极10的第一端SnL,如图4所示。 [0083] After the above detection is complete, then the electrode 10 to a first end of SnL ground, the second terminal electrode connected to the clamp circuit 212 SnR 10, i.e., a first node electrically connected to the second terminal electrode 10 SnR, and the second node is electrically connected to a first terminal b SnL electrode 10, as shown in FIG. 由式(2),此时Ct上的电压为: By the formula (2), when the voltage on Ct is:

[0084] [0084]

Figure CN103699278BD00111

[0085]则Ct上将存储的电荷Q2为 [0085] Ct is the charge Q2 is stored on

[0086] [0086]

Figure CN103699278BD00112

(4)〇 (4) billion

[0087] 由于恒流源212只能提供电阻串上流过的电流,这一电荷由电荷收发检测电路211 提供,并可由其量化成为第二自电容变化量。 [0087] Since only the constant current source 212 provides a current flowing through the resistor string, the charges provided by the charge transceiver 211 detecting circuit, and may be quantized by the second self-capacitance variation.

[0088] 从而变量采集模块21对于发生触摸电极10将采集获得第一自电容变化量和第二自电容变化量共两个自电容变化量数据。 [0088] The acquisition module 21 so that the variable occurs to the touch electrode 10 collected from the obtained first and second self-capacitance variation amount of capacitance change from the capacitance variations were two data.

[0089] 就此,本发明提出一种用于触摸屏的自电容变化检测方法,基于自电容传感装置, 该自电容传感装置包括至少一电极。 [0089] In this connection, since the present invention provides a method for detecting a capacitance change of the touch screen, based on self capacitance sensing means, the self-capacitance sensing means comprises at least one electrode. 所述电极包括在沿第一方向的第一端和第二端。 The electrode comprises a first direction along a first end and a second end. 具体到本发明如图1所示的实施例中,所述第一方向就是实施例中直角坐标系的横坐标X轴方向。 Specific to the present invention, the embodiment shown in FIG. 1, the abscissa is the first direction X-axis direction in a rectangular coordinate system embodiment embodiment. 所述方法针对每个电极执行以下步骤, The method performs the following steps for each electrode,

[0090] A.在电极的第一端电连接恒流源、钳位电路和电荷收发检测电路,将该电极的第二端接地;所述恒流源向电极输出恒定电流值的电流;所述钳位电路令所电连接电极的一端的电位限定于恒定电位;所述电荷收发检测电路能够输出电荷或者接收电荷,并检测电荷输出量或者接收量,量化电荷输出量为自电容变化量; [0090] A. at a first end electrically connected to a constant current source electrode, a transceiver and a charge clamp circuit detecting circuit, the second terminal of the electrode; electrode to the constant current source outputs a constant current value of the current; the said clamping circuit to make the electric potential at one terminal connected to a constant potential defining electrode; the charge detecting circuit can output the transceiver receives the charge or charge, and detect or receive an amount of output charge, the amount of the charge output from the quantization capacitance variations;

[0091] B.电荷收发检测电路检测是否有电荷输出; If [0091] B. transceiver charge detection circuit for detecting the charge output;

[0092]如果有电荷输出,则量化电荷输出量或者电荷接收量为第一自电容变化量,随后执行步骤C;显然出现该步骤的情况就是所述电极被触碰的情况; [0092] If the output of the charge, the charge amount or charge-receiving outputs of the first quantization self-capacitance variation, then step C; the case of this step is touched where the electrodes are apparently occurred;

[0093] 如果没有电荷输出,直接执行步骤E; [0093] If there is no charge output, perform Step E;

[0094] C.在电极的第二端电连接恒流源、钳位电路和电荷收发检测电路,将该电极的第一端接地; [0094] C. at the end of the second electrode is electrically connected to the constant current source, clamp circuit and a transceiver charge detection circuit, the first grounded electrode;

[0095] D.电荷收发检测电路量化电荷输出量为第二自电容变化量; [0095] D. transceiver charge detection circuit to a second quantization output from the charge amount of capacitance change;

[0096] E.针对所述电极的自电容变化检测结束。 [0096] E. for electrode from the capacitance change detection end.

[0097] 所述方法是针对每个电极执行一次上述步骤,完成一次针对该电极的自电容变化检测。 The [0097] method is performed once for each of the electrodes above steps, from a detected change in capacitance for the electrode. 可见所述方法在步骤B中如果没有检测到电荷输出或者接收电荷,就直接完成对该电极的自电容变化的检测。 The method can be seen in step B if no charge to the charge output or receive, directly from the completion detecting a change in capacitance of the electrode. 只有检测到电荷输出或者接收电荷的情况下,才进行第一节点和第二节点与电极第一端和第二端互换电连接的操作,并继续检测。 A case where only the detected or received charge to the charge output, only for the first node and the second node and a first end and a second end of the operation electrode is electrically connected to the exchange, and continue to test. 当然,无论电荷收发检测电路是否检测到有电荷输出或者接收电荷,在一个相对固定的时间段内,都进行第一节点和第二节点与电极第一端和第二端互换电连接的操作,并继续检测的操作过程也应当是本发明上述方案的一种可选替代方案,应当还在本发明的保护范围之内。 Of course, regardless of whether the charge detecting circuit detects that the transceiver has received a charge or the charge output, in a relatively fixed period of time, both operating point and the first node and second electrodes of the first and second ends electrically connected to the exchange , and the process continues to detect operation of the present invention should also be one of the above alternatives alternative embodiment, it should be also within the scope of the present invention.

[0098] 如上所述步骤A所述恒流源向电极输出的恒定电流值是I,所述钳位电路令所电连接电极的一端的电位限定的恒定电位是VI,那么应当满足V1/I = R,R是钳位电路和恒流源所电连接电极的电阻。 [0098] As described above in Step A constant current source is a constant current value to the output electrode electrically I, the clamp circuit so that the potential of the constant potential defining electrode is connected to one end of the VI, then it should satisfy V1 / I = R, R is the resistance of the connection electrode clamp circuit and a constant current power source.

[0099] 在上述方法基础上本发明还提出一种用于触摸屏的自电容传感装置,包括至少一电极10,以及电连接各电极10的自电容变化检测单元2。 [0099] In the above-described method on the basis of the present invention also provides a self capacitance touch screen for sensing apparatus, comprising at least one electrode 10, and electrically connected to each electrode from the capacitance change detecting unit 10 2. 所述电极10呈矩形,包括用于电连接自电容变化检测单元的、沿该电极延伸方向的第一端和第二端。 The electrode 10 has a rectangular shape, comprising means for electrically connecting the self-capacitance change detecting means, along the extending direction of the first electrode and second ends. 在本发明实施例中,电极延伸方向就是矩形电极的长边所在方向,也就是图1所示直角坐标系中的横坐标X轴方向。 In an embodiment of the present invention, the electrode extending in a direction that is the direction of the long side of the rectangular electrode, the abscissa is a rectangular coordinate system X-axis direction shown in FIG. 从而所述电极10包括第一端SnL和第二端SnR。 So that the electrode 10 comprises a first end and a second end SnL SnR. 所述自电容变化检测单元2包括至少一变量采集模块21。 Since the capacitance change detecting unit 2 comprises at least a variable acquisition module 21. 该变量采集模块21包括电连接于第一节点a的恒流源212、钳位电路213和电荷收发检测电路211,以及接地的第二节点b。 The collection module 21 comprises a variable constant current source is electrically connected to a first node 212, clamp circuit 213, and a transceiver charge detection circuit 211, and a grounded second node b. 在针对一个电极10的检测过程中,所述变量采集模块21的第一节点a先电连接电极10的第一端SnL,且第二节点b电连接电极的第二端SnR, 采集到第一自电容变化量之后,变量采集模块21的第一节点a再电连接该电极10的第二端SnR,且第二节点b电连接电极10的第一端SnL,以采集第二自电容变化量。 In a process for the detection electrode 10, the variable node acquisition module 21 is electrically connected to a first electrode of a first end of SnL 10, and the node b is electrically connected to the second terminal electrode SnR, first collected since the amount of change in capacitance, the variable node acquisition module 21 and then a second end electrically connected to the electrode SnR 10 and second node b SnL electrically connecting the first end of the electrode 10, to acquire a second self-capacitance variation . 所述钳位电路213 将所电连接电极I 〇-端的电位限定在恒定电位,所述恒流源212向所电连接电极10提供恒定电流;所述电荷收发检测电路211因其所电连接电极10的自电容变化,向该电极10输出电荷,并检测电荷输出量或者电荷接收量,量化电荷输出量为自电容变化量。 The clamp circuit 213 is electrically connected to the potential of the electrode end 〇- I defined at a constant potential, the constant current source 212 10 supplies a constant current to the connection electrode; the charge detecting circuit 211 because the transceiver is electrically connected to the electrode since the capacitor 10 is changed, to charge the output electrode 10, and detects an amount of charge or charge-receiving outputs amount, an amount of the charge output from the quantization capacitor variation.

[0100] 所述钳位电路将所电连接电极一端的电位限定的恒定电位是VI,所述恒流源向所电连接电极提供的恒定电流是I,那么应当满足V1/I = R,R是钳位电路和恒流源所电连接电极的电阻。 [0100] The clamp circuit connected to a constant potential of the potential defining electrode is an end of the electric VI, the constant current source provides a constant current electrode is electrically connected to the I, it should satisfy V1 / I = R, R is the resistance of the connection electrode clamp circuit and a constant current power source.

[0101] 作为用于触摸屏的自电容变化检测方法后续将自电容变化量数据转换成坐标数据的方法,本发明提出一种触碰点坐标数据处理方法,基于所述步骤A至步骤E的用于触摸屏的自电容变化检测方法,所述各电极沿垂直于第一方向的第二方向依序排布。 Conversion [0101] As a method for detecting a change in capacitance from the touch screen will follow from the capacitance change amount data into the coordinate data of the method, the present invention provides a data processing method of the touch point coordinates based on the step A to step E with since the capacitance change detection method in a touch screen, said electrodes along a second direction perpendicular to the first direction is sequentially arranged. 在本发明实施例中,所述第一方向是图1所示直角坐标系的横坐标X轴方向,从而第二方向就是图1所示直角坐标系的纵坐标Y轴方向。 In an embodiment of the present invention, the first direction is horizontal and the X-axis direction in a rectangular coordinate system shown in FIG. 1, such that the second direction is the Y-axis direction in a rectangular coordinate system the ordinate shown in FIG. 所述方法包括: The method comprising:

[0102] F.当一个触碰点令K个电极的自电容发生变化时,获取到涉及该触碰点的K对自电容变化量,即2K个自电容变化量; [0102] F. When a touch point so that the K electrodes from change in the capacitance, obtained K relates the touch point from the capacitance variation, i.e., a self-capacitance variation 2K;

[0103] G.选择2K个自电容变化量中最大的一个; [0103] G. 2K select a self-capacitance of a largest amount of change;

[0104]该最大自电容变化量所属电极是沿第二方向的第T个电极,该最大自电容变化量是所述第T个电极的第一自电容变化量,即DTU,第T个电极的另一个自电容变化量是该电极的第二自电容变化量,即DTV, The first electrode T [0104] The maximum change amount of self-capacitance electrode belongs to a second direction, which is the maximum amount of change of the self-capacitance of the T of the first electrode from the capacitance variation, i.e. the DTU, the first electrode T another variation of the self-capacitance of the second capacitor from the variation of the electrode, i.e., a DTV,

[0105]从而第T个电极沿第二方向两侧电极各自的第一自电容变化量分别是D(T+l )U,D (T+2)U,…,D(T+W1)U,以及D(T-1)U,D(T-2)U,…,D(T-W2)U;第二自电容变化量分别是D(T+ 1)V,D(T+2)V,…,D(T+W1)V,以及D(T-1)V,D(T-2)V,…,D(T-W2)V,W1+W2+1=K; [0105] so that the respective sides of the first electrode from the capacitance variations of the first electrode along the second direction T are D (T + l) U, D (T + 2) U, ..., D (T + W1) U , and D (T-1) U, D (T-2) U, ..., D (T-W2) U; second self capacitance variations are D (T + 1) V, D (T + 2) V , ..., D (T + W1) V, and D (T-1) V, D (T-2) V, ..., D (T-W2) V, W1 + W2 + 1 = K;

[0106] H.若各电极沿第一方向的长度是XO,沿第二方向的长度是YO,那么步骤A所述触碰点沿第二方向坐标Y是, [0106] H. If the length of each electrode in the first direction is XO, the length in the second direction is YO, then step A the touch point coordinate in the second direction Y is

[0107] [0107]

Figure CN103699278BD00121

[0108] 步骤A所述触碰点沿第一方向横向坐标X是, [0108] A step of the touch point along the first direction X transverse coordinate is

[0109] [0109]

Figure CN103699278BD00122

[0110] 上述方法具体到本发明实施例中,所述变量采集模块21采集到的第一、第二自电容变化量数据传输给专用的坐标数据处理器单元,或者带有坐标数据处理功能的数据处理器。 [0110] The method of the present invention to the particular embodiment, the acquisition of the first variable, a second self-capacitance of a data transfer module 21 changes the amount of collected data to the dedicated processor unit coordinates or coordinate with the data processing function a data processor. 基于本发明采集的第一、第二自电容变化量数据,触摸坐标数据可依据上述方法通过如下具体方案获取,如图1所示,假设触碰点影响三个相邻电极10,处于中间位置的编号是Sn 的电极10的在上述两次检测中获得第一自电容变化量D3,第二自电容变化量D4,其中第一自电容变化量D3为所有变化量的最大值。 The present invention is acquired first, second self-capacitance variation data, a touch coordinate data can be obtained by the method according to the above embodiment based on specific, as shown, assuming the touch point 1 in three adjacent electrodes 10, in the intermediate position Sn are numbered from the first electrode capacitance variations obtained in the above-described two detection D3 10 and a second self-capacitance variation D4, wherein the first self-capacitance variation D3 is the maximum of all the amount of change. 那么编号是S(nl)的电极在两次检测中获得第一自电容变化量Dl和第二自电容变化量D2。 Code is then S (nl) from the electrodes to obtain a first and a second capacitance variation Dl D2 from the capacitance variations in the two assays. 编号是S(n+1)的电极10的两次检测获得第一自电容变化量D5和第二自电容变化量D6。 Code is detected twice S (n + 1) of the first electrode 10 is obtained from the capacitance variation D5 and second self-capacitance variation D6. 若每个电极10沿直角坐标系的Y轴方向的长度为YO,那么触摸点的Y轴坐标是, When each electrode 10 along the length of the rectangular coordinate system for the Y-axis direction YO, then Y-axis coordinate of the touch point is

[0111] [0111]

Figure CN103699278BD00131

(5), (5),

[0112] 若电极10在X轴总长度为XO,那么触摸点的X轴坐标采用比例算法得到,具体为: [0112] When the electrode 10 in the X axis the total length of the XO, then X-axis coordinate of the touch point is proportional algorithm, specifically:

[0113] [0113]

Figure CN103699278BD00132

(6)〇 (6) billion

[0114] 本发明提出一实现变量采集模块21的实施例,如图5所示,所述钳位电路213包括一运算放大器0P,钳位电路213所限定的恒定电位由该运算放大器OP正向输入端的输入电压Vf控制。 [0114] The present invention proposes to realize a variable acquisition module 21 of the embodiment shown in Figure 5, the clamp circuit 213 includes an operational amplifier 0P, clamp circuit 213 defined by a constant positive potential of the operational amplifier OP input voltage Vf control input. 运算放大器OP通过与电荷收发电容Cc构成的反馈电路,令电位Vf在运算放大器OP的反向输入端形成钳位电压。 The operational amplifier OP through a feedback capacitance Cc transceiver circuit configuration of the charge, so that the clamp voltage potential Vf is formed at the inverting input of the operational amplifier OP. 所述电荷收发检测电路211包括所述用作钳位电路213的运算放大器0P,电连接在该运算放大器OP反相输入端与输出端之间的电荷收发电容Cc,以及电连接所述运算放大器OP的输出端的交直流转换子模块2111。 The transceiver charge detection circuit 211 as the clamp circuit 213 comprises an operational amplifier 0P, electrically connected between the inverting input terminal of the operational amplifier OP and the output terminal of the charge capacitor transceiver Cc, and electrically connected to the operational amplifier OP is the output of AC-DC conversion sub-module 2111. 所述恒流源212的电流输出端和运算放大器OP的反相输入端都电连接于第一节点a。 The constant current source output and the inverting input of the operational amplifier OP 212 are electrically connected to the first node a. 所述恒流源212可以采用现有的电流源产品,或者实现电流源功能的电路。 The constant current source 212 current source may be employed conventional product, or to achieve a current source circuit functions. 当有电荷流入或流出运算放大器OP的反相输入端时,该运算放大器OP能够通过电荷收发电容Cc提供电荷,并以运算放大器OP的输出电压形式量化出来,该输出电压电压的变化量与电荷收发电容Cc成反比。 When charge flows into or flows inverting input of the operational amplifier OP, the operational amplifier OP charges can be provided by the transceiver charge capacitance Cc, and the output voltage in the form of quantized out the operational amplifier OP, the amount of change of the output voltage of the charge capacitance Cc is inversely proportional to the transceiver. 运算放大器OP的输出电压变化通过交直流转换子模块2111转换为数字量,从而输出至数据处理器进行进一步处理。 Changes in output voltage of the operational amplifier OP through the AC-DC conversion sub-module 2111 is converted to digital, to output to the data processor for further processing.

[0115] SW电路的作用是复位,每次检测完毕后它就闭合一次,将OP的输出端电压恢复为初始值,再进行下一次检测。 Effect [0115] SW circuit is reset each time after testing it is closed, the voltage of the output terminal OP is restored to an initial value, then the next detection.

[0116] 本发明上述实施例中为了在每次检测后复位电路状态,如图5所示,在所述电荷收发电容Cc的两端之间还电连接有复位开关SW。 The above-described embodiment shown in [0116] the present invention, the reset circuit in order to detect each state, as shown in FIG 5, there is also electrically connected between the ends of the reset switch SW transceiver charge the capacitance Cc. 每次检测完毕后复位开关SW就闭合一次,将运算放大器OP的输出端电压恢复为初始值,再进行下一次检测。 After each test is completed once the reset switch SW closes, the voltage output of the operational amplifier OP is restored to the initial value, then the next detection.

[0117] 本发明的矩形电极还可以有多种等同结构。 [0117] Rectangular electrode of the present invention may have a variety of equivalent structures. 如图6所示,一种电极的具体结构是, 所述电极10的至少一个顶角被切除形成直线段斜边111,从而电极10被加工成带有斜边111 的矩形电极101。 6, a specific structure of an electrode, said electrodes forming at least one apex is cut oblique straight line segments 10, 111, so that the electrode 10 is processed into a rectangular shape electrode 101 having a beveled edge 111. 如图7所示,另一种电极10的具体结构是,所述电极10的至少一个顶角被切除形成圆弧边112,从而电极10被加工成带有圆弧边112的矩形电极102。 As shown in FIG. 7, another specific structure of the electrode 10 is the electrode at least one annular edge 112 is cut apex 10 is formed, so that the electrode 10 is processed into an electrode 102 having a rectangular annular edge 112. 如图8所示,还有一种电极10的具体结构是,所述电极10的至少一条边加工有至少两个凹槽113,在两相邻两凹槽113之间形成凸齿114,从而电极10被加工成带有锯齿边的矩形电极103。 8, there is a specific configuration of electrode 10 is the working electrode 10 at least one side with at least two grooves 113, 114 formed between two teeth adjacent two grooves 113, so that the electrode electrode 10 is processed into a rectangular with a serrated edge 103.

[0118]本发明所述电极10用氧化铟锡IT0、金属网metal mesh或者碳纳米材料制成。 [0118] The present invention is indium tin oxide electrode 10 is IT0, metal mesh made of metal or a carbon nanomaterial. 如图9所示,电极10用金属网metal mesh制成,所述金属网是由金属丝115搭接成网状而成,图9 中的虚线部分就是金属网所等效成的矩形电极形状。 As shown, an electrode 9 made of a 10 mesh metal mesh metal, the metal mesh is made of wire mesh formed into lap 115, the dotted line portion in FIG. 9 is the equivalent of the metal mesh into a rectangular shape of the electrode .

[0119]关于电极的敷设结构,所述自电容传感装置还包括用树脂合成薄膜材料或者用玻璃制成的基板,所述电极附着在该基板上。 [0119] laying the structure on the electrode, the self-capacitance sensing means further comprises a synthetic resin film material or the substrate made of glass, the electrodes are attached on the substrate. 所述电极可以借助粘贴、蚀刻、切割或者焊接工艺附着在基板之上。 The electrode may be attached by means of etching, cutting or welding process is attached on the substrate.

[0120] 本发明可以采用的一种电极扫描检测方式是,所述自电容变化检测单元包括一套变量采集模块。 [0120] An electrode of the present invention, scan test mode may be employed that the self-capacitance change detecting means comprises a variable acquisition module. 该套变量采集模块受控地按照设定的时序依次电连接所述各电极,即分时地电连接各电极以完成对各电极的自电容变化检测。 The set of controlled variables collection module is set in accordance with the timing of sequentially electrically connecting the respective electrodes, i.e., divisional electrodes each electrically connected to the self-completion detecting a change in capacitance of each electrode. 举例来说,如图10所示,图1所示各电极10两端都电连接在自电容变化检测单元2的n对端口上。 For example, as shown in FIG. 10, FIG. 1 at both ends of the respective electrodes 10 are electrically connected to the capacitance change detecting unit from the n 2 port. 所述自电容变化检测单元2设置一对受控分时电连接各对端口的受控端口c、d。 Since the capacitance change detection unit 2 provided with a pair of electrically connecting the respective controlled time-controlled port to port c, d. 所述自电容变化检测单元2内仅设置一套变量采集模块21。 Since the capacitance change detecting unit 21 is provided a variable acquisition module 2 only. 开始检测时,受控端口c、d先电连接序号是1的一对端口,该对端口分别电连接编号是Sl的电极10的第一端SlL和第二端S2R。 Detecting the start, controlled ports c, d are electrically connected to a pair of serial port 1, the port number is electrically connected to a first electrode Sl SlL end and a second end of S2R 10. 所述变量采集模块21按照本发明所述方法,将第一节点a和第二节点b倒换地电连接受控端口c、d,从而完成对编号是Sl的电极10的检测,检测结构由变量采集模块21输出至相应的数据处理器单元。 The variable acquisition module 21 according to the method of the present invention, the first node and a second node b is connected electrically controlled switching ports c, d, thereby completing an electrode Sl detection code is detected by the variable structure 10 acquisition module 21 outputs to the respective data processor units. 此后受控端口c、d按设定的时序电连接序号是2的一对端口,对编号是S2的电极10检测。 Thereafter controlled port c, d according to the set sequence number is electrically connected to a pair of ports 2, 10 of the code is the detection electrode S2. 依此类推,受控端口电连接序号是n的一对端口,对编号是Sn的电极10检测,直到所有电极10都被检测后,完成一次电极扫描的过程。 And so on, are controlled port number n are electrically connected to a pair of ports, number of Sn detecting electrode 10 is, until all the electrodes 10 are detected after the completion of a process of scanning electrodes. 此种扫描方式就是用一套变量采集模块分时地检测所有电极。 Such scan mode is set acquisition module detects all variable time division electrodes.

[0121] 另一种电极扫描检测方式,所述变量采集模块的数量少于电极的数量;各变量采集模块受控地按照设定的时序依次一对一地电连接所有电极中的部分电极,即分时分区域地电连接各电极以完成对各电极的自电容变化检测。 [0121] Another way of detecting a scanning electrode, the variable is less than the number of collecting electrode module; controlled variables collection module is set in accordance with the timing of sequentially electrically connected to one electrode of all partial electrodes, i.e., divisional subregion electrically connected to each electrode to complete the detection of a change in self-capacitance of each electrode. 本方案与上述实例情况相类似,只是用多套变量采集模块对由多个电极组成的区域分时完成检测,是一种分时分区域的电极扫描方式。 This embodiment is similar to the case of the above-described example, except that multiple sets of variable region acquisition module composed of a plurality of time-completion detecting electrodes, a scanning electrode subregion sharing.

[0122] 还可以用一对一的电极扫描检测方式,所述变量米集模块一对一地电连接所述电极。 [0122] one can also use a scanning electrode is detected embodiment, the variable current meter module electrically connected to the one electrode. 此种扫描方式既可以实现分时扫描,也可以实现分时分区域扫描。 Such scanning may be implemented either sharing scanning may be realized time-zone scanning points.

[0123] 所述自电容传感装置既可以用于构成独立的、作为输入设备的触摸屏,也可以与显示设备结合而构成触摸显示屏。 [0123] The self-capacitance sensing means may be used to constitute an independent, touch screen as an input device, a display device can also be combined to form a touch screen.

[0124] 当自电容传感装置与显示设备结合时,所述自电容传感装置安装在液晶显示屏内。 [0124] When the self-capacitance sensing device in conjunction with a display device, the self-capacitance sensing means is mounted in a liquid crystal display. 如图11所示,该液晶显示屏3包括第一液晶基板31和第二液晶基板32,以及夹在第一液晶基板31与第二液晶基板32之间的液晶材料33、像素电极34、彩色滤光层35和黑矩阵36。 11, the liquid crystal display 3 comprises a first substrate 31 and the second liquid crystal substrate 32, and liquid crystal sandwiched between the first substrate 31 and the liquid crystal material between the second substrate 32 liquid crystal 33, the pixel electrode 34, the color filter layer 35 and the black matrix 36. 所述电极附着在所述第一液晶基板31的上层或者下层,或者第二液晶基板32的上层或者下层。 The upper layer 31 or lower layer or the upper layer or the second liquid crystal substrate 32 of the lower electrode substrate attached to said first liquid crystal. 所述电极可以借助粘贴、蚀刻、切割或者焊接工艺附着在第一液晶基板31或者第二液晶基板32上。 The electrode may be attached by means of etching, cutting or welding process attached to the first or the second substrate 31 liquid crystal 32 liquid crystal substrate.

[0125] 当自电容传感装置与显示设备结合时,在电路方面可以采用与液晶显示屏的固有电路集成在同一芯片内的结构,所述自电容传感装置安装在液晶显示屏内。 [0125] When the self-capacitance sensing device in conjunction with a display device, may be employed in terms of the inherent circuit of the liquid crystal display panel integrated circuits within the same chip structure, the self capacitance sensing means is mounted in a liquid crystal display. 该液晶显示屏由显示驱动电路芯片控制。 The chip control circuit driven by the LCD display. 所述自电容变化检测单元集成在所述显示驱动电路芯片内。 Since the capacitance change detecting unit is integrated within the display drive circuit chip.

[0126] 当自电容传感装置与显示设备结合时,在控制方面为了避免电极扫描检测与液晶扫描互相干扰,所述自电容传感装置还包括协调检测模块。 [0126] When the self-capacitance sensing device incorporated with a display device, in order to avoid the control electrode and the liquid crystal scan Scan interfere with each other, the self-capacitance sensing means further includes a coordination module detection. 所述自电容传感装置安装在液晶显示屏内。 The self capacitance sensing means is mounted in a liquid crystal display. 该液晶显示屏由显示驱动电路控制。 The LCD display is controlled by the drive circuit. 此时显示驱动电路既可以与自电容变化检测单元在同一芯片内,也可以互相独立地存在于各自所属芯片内。 At this time, the display driving circuit may be self-capacitance change detecting means in the same chip, independently of one another may be present within their respective chip. 所述协调检测模块电连接所述自电容变化检测单元和显示驱动电路,以令自电容变化检测单元和显示驱动电路互不干扰地分时段和/或分区域完成各自功能。 The coordinate detecting module is electrically connected to the self-capacitance change detecting unit and a display driving circuit, in order to make self-capacitance change detection unit and the sub-display driving circuit without mutual interference period and / or sub-region of their respective functions. 所述分时段完成各自功能是指,在一个设定的时间段内,分配给自电容变化检测单元一个以上的时段完成扫描检测,该时段内显示驱动电路不工作,将剩余的时段分配给显示驱动电路完成扫描,此时段内自电容变化检测单元不工作。 The completion of each sub-time function is a function, in a set period of time, the period allocated to itself more than a capacitance change detecting means detects the completion of scanning, the display driving circuit does not work, the remaining period of time within the period allocated to the display complete the scan driving circuit, since a capacitance change within this time period detecting means does not operate. 所述分区域完成各自功能是指,将屏体分成多个互不重合的区域,协调分配自电容变化检测单元和显示驱动电路在不同的区域内实施扫描,也就是对于同一区域,进行自电容检测扫描的时候,不进行显示驱动扫描,而进行显示驱动扫描的时候,不进行自电容检测扫描。 The sub-region of their respective function is a function, the screen body is divided into a plurality of regions do not overlap each, from the capacitance change detecting coordinate distribution unit and a display driving circuit performs scanning in a different area, namely for the same area, self capacitance detecting when the scan time, scan display driving is not performed, the display driver performs scanning, the scanning is not performed since the capacitance detection.

Claims (16)

1. 一种用于触摸屏的自电容传感装置,包括至少一电极,以及电连接各电极的自电容变化检测单元;其特征在于: 所述电极呈矩形,包括用于电连接自电容变化检测单元的、沿该电极延伸方向的第一端和第二端; 所述自电容变化检测单元包括至少一变量采集模块;该变量采集模块包括电连接于第一节点的恒流源、钳位电路和电荷收发检测电路,以及接地的第二节点; 在针对一个电极的检测过程中,所述变量采集模块的第一节点先电连接电极的第一端,且第二节点电连接电极的第二端,采集到第一自电容变化量之后,变量采集模块的第一节点再电连接该电极的第二端,且第二节点电连接电极的第一端,以采集第二自电容变化量; 所述钳位电路将所电连接电极一端的电位限定在恒定电位,所述恒流源向所电连接电极提供恒定电流;所述电荷收发检测电路 A self capacitance touch screen for sensing apparatus, comprising at least one electrode, and an electrical connection from each electrode capacitance change detection unit; characterized in that: said electrodes are rectangular, including self-detection of capacitance change for electrical connection means, extending from the electrode along the direction of the first and second ends; the self-capacitance change detecting unit comprises at least a variable acquisition module; the collection module comprises a variable constant current source electrically connected to the first node, the clamping circuit a transceiver and a charge detecting circuit, a second node and ground; the detection process for one of the electrodes, the variable node acquisition module of the first terminal is electrically connected to a first electrode and a second electrode electrically connected to a second point end, then first collected from the capacitance variations, variable node acquisition module is further electrically connected to the second terminal electrode and the second node is electrically connected to the first terminal electrodes, to acquire a second self-capacitance variation; the said clamping circuit electrically connected to the potential of the electrode is defined in one end of a constant potential, said constant current source is electrically connected to the electrode supplies a constant current; the charge detecting circuit transceiver 因其所电连接电极的自电容变化向该电极输出电荷,并检测电荷输出量,量化电荷输出量为自电容变化量; 所述钳位电路包括一运算放大器,该钳位电路所限定的恒定电位由该运算放大器正向输入端的输入电压控制; 所述电荷收发检测电路包括所述用作钳位电路的运算放大器,电连接在该运算放大器反相输入端与输出端之间的电荷收发电容,以及电连接所述运算放大器的输出端的交直流转换子模块; 所述恒流源的电流输出端和运算放大器的反相输入端都电连接于第一节点。 Since because of the change in capacitance electrode electrically connected to the electrode output charge, and detecting the amount of the charge output, the amount of the charge output from the quantization capacitor variation; said clamping circuit comprises an operational amplifier, the clamping circuit defined constant the potential of the input of the operational amplifier positive input terminal of the control voltage; transceiving said charge detecting circuit includes an operational amplifier is used as the clamp circuit electrically connected between the inverting input terminal of the operational amplifier and the output terminal of the charge capacitor transceiver and electrically connecting the operational amplifier output terminal of the AC-DC conversion sub-module; inverting input terminal of the operational amplifier and the current output terminal of the constant current source are electrically connected to the first node.
2. 根据权利要求1所述的用于触摸屏的自电容传感装置,其特征在于: 所述钳位电路将所电连接电极一端的电位限定的恒定电位是VI,所述恒流源向所电连接电极提供的恒定电流是I,那么应当满足V1/I = R,R是钳位电路和恒流源所电连接电极的电阻。 The self capacitance sensing means for a touch panel according to claim 1, wherein: said clamping circuit The electrical potential of the connection end of the electrode is defined Vl constant potential, the constant current source to the electrically connecting electrodes to provide a constant current is I, then it should satisfy V1 / I = R, R is the resistance of the connection electrode clamp circuit and a constant current power source.
3. 根据权利要求1所述的用于触摸屏的自电容传感装置,其特征在于: 在所述电荷收发电容的两端之间还电连接有复位开关。 The self capacitance sensing means for a touch panel according to claim 1, wherein: the reset switch is electrically connected between both ends of the capacitor charge transceiver.
4. 根据权利要求1所述的用于触摸屏的自电容传感装置,其特征在于: 所述电极的至少一个顶角被切除形成直线段斜边,从而电极被加工成带有斜边的矩形电极。 The self capacitance sensing means for a touch panel according to claim 1, wherein: said at least one apex is cut oblique straight line segments forming the electrode, so that the electrode is processed into a rectangular shape with the hypotenuse electrode.
5. 根据权利要求1所述的用于触摸屏的自电容传感装置,其特征在于: 所述电极的至少一个顶角被切除形成圆弧线段边,从而电极被加工成带有圆弧边的矩形电极。 The self capacitance sensing means for a touch panel according to claim 1, wherein: at least a vertical angle formed by cutting the circular arc segment electrode side, so that the electrodes are processed into a circular arc with the edge rectangular electrodes.
6. 根据权利要求1所述的用于触摸屏的自电容传感装置,其特征在于: 所述电极的至少一条边加工有至少两个凹槽,在两相邻两凹槽之间形成凸齿,从而电极被加工成带有锯齿边的矩形电极。 The self capacitance sensing means for a touch panel according to claim 1, wherein: said electrode is at least one side with at least two machining groove formed between two adjacent teeth two grooves , so that the electrodes are processed into rectangular electrodes having serrated edges.
7. 根据权利要求1所述的用于触摸屏的自电容传感装置,其特征在于: 所述电极用氧化铟锡、金属网或者碳纳米材料制成。 The self capacitance sensing means for a touch panel according to claim 1, wherein: said electrodes are made of indium tin oxide, a metal mesh or a carbon nanomaterial.
8. 根据权利要求1所述的用于触摸屏的自电容传感装置,其特征在于: 还包括用树脂合成薄膜材料或者用玻璃制成的基板,所述电极附着在该基板上。 The self capacitance touch screen for sensing apparatus according to claim 1, characterized in that: further comprising a synthetic resin film material or the substrate made of glass, the electrodes are attached on the substrate.
9. 根据权利要求1所述的用于触摸屏的自电容传感装置,其特征在于: 所述自电容传感装置安装在液晶显示屏内;该液晶显示屏包括第一液晶基板和第二液晶基板,以及夹在第一液晶基板与第二液晶基板之间的液晶材料、像素电极、彩色滤光层和黑矩阵; 所述电极附着在所述第一液晶基板的上层或者下层,或者第二液晶基板的上层或者下层。 9. The self-capacitance touch screen for sensing apparatus according to claim 1, wherein: said self-capacitance sensing means is mounted in a liquid crystal display; LCD which includes a first substrate and a second liquid crystal a substrate, and a liquid crystal material is sandwiched between the first substrate and the second liquid crystal substrate, a pixel electrode, a color filter layer and the black matrix; attached to the upper or lower electrodes of the first liquid crystal substrate or the second upper or lower substrate of the liquid crystal.
10. 根据权利要求1所述的用于触摸屏的自电容传感装置,其特征在于: 所述自电容变化检测单元包括一套变量采集模块;该套变量采集模块受控地按照设定的时序依次电连接所述各电极,即分时地电连接各电极以完成对各电极的自电容变化检测。 10. The self capacitance sensing means for a touch panel according to claim 1, wherein: said self-capacitance change detecting means comprises a variable acquisition module; capture timing module of the set variable controlled according to a set electrically connecting the respective electrodes in sequence, i.e. each electrode is electrically connected to a time division manner to complete the self-capacitance change detecting the respective electrodes.
11. 根据权利要求1所述的用于触摸屏的自电容传感装置,其特征在于: 所述变量采集模块的数量少于电极的数量;各变量采集模块受控地按照设定的时序依次一对一地电连接所有电极中的部分电极,即分时分区域地电连接各电极以完成对各电极的自电容变化检测。 According to claim 1, said sensing means for self-capacitance touch screen, wherein: said acquisition variable number of modules less than the number of electrodes; controlled variables collection module in accordance with a timing setting sequentially a connecting portion electrically to electrodes of all electrodes, i.e. sharing in regions electrically connected each electrode to complete the self-capacitance of each of the detection electrode changes.
12. 根据权利要求1所述的用于触摸屏的自电容传感装置,其特征在于: 所述变量采集模块一对一地电连接所述电极。 12. The self capacitance sensing means for a touch panel according to claim 1, wherein: said variable acquisition module electrically connected to one of said electrodes.
13. 根据权利要求1所述的用于触摸屏的自电容传感装置,其特征在于: 所述自电容传感装置安装在液晶显示屏内;该液晶显示屏由显示驱动电路芯片控制; 所述自电容变化检测单元集成在所述显示驱动电路芯片内。 13. The self capacitance sensing means for a touch panel according to claim 1, wherein: said self-capacitance sensing means is mounted in a liquid crystal display; chip control circuit is driven by the LCD display; the since the capacitance change detecting unit are integrated in the display driver circuit within a chip.
14. 根据权利要求1所述的用于触摸屏的自电容传感装置,其特征在于: 还包括协调检测模块; 所述自电容传感装置安装在液晶显示屏内;该液晶显示屏由显示驱动电路控制; 所述协调检测模块电连接所述自电容变化检测单元和显示驱动电路,以令自电容变化检测单元和显示驱动电路互不干扰地分时段和/或分区域完成各自功能。 14. The self capacitance sensing means for a touch panel according to claim 1, characterized in that: further comprising a coordinate detection module; self-capacitance of the sensor means is mounted in a liquid crystal display screen; liquid crystal display by the display driver a control circuit; said coordinate detecting module is electrically connected to the self-capacitance change detecting unit and a display driving circuit, in order to make self-capacitance change detection unit and the sub-display driving circuit without mutual interference period and / or sub-region of their respective functions.
15. -种触碰点坐标数据处理方法,基于自电容传感装置,该自电容传感装置包括至少一电极;所述电极包括沿第一方向的第一端和第二端;所述各电极沿垂直于第一方向的第二方向依序排布,其特征在于: 针对每个电极执行以下步骤, A. 在电极的第一端电连接恒流源、钳位电路和电荷收发检测电路,将该电极的第二端接地;所述恒流源向电极输出恒定电流值的电流;所述钳位电路令所电连接电极的一端的电位限定于恒定电位;所述电荷收发检测电路能够输出电荷或者接收电荷,并检测电荷输出量或者接收量,量化电荷输出量为自电容变化量; B. 电荷收发检测电路检测是否有电荷输出; 如果有电荷输出,则量化电荷输出量为第一自电容变化量,随后执行步骤C; 如果没有电荷输出,直接执行步骤E; C. 在电极的第二端电连接恒流源、钳位电路和电荷收发检测 15. - kind of the touch point coordinate data processing method based on self capacitance sensing means, the self-capacitance sensing means comprises at least one electrode; a first direction along the electrode comprises first and second ends; each of said electrodes arranged sequentially along a vertical direction of the first direction to the second, characterized in that: the following steps for each electrode, A. electrically connected at a first end of the constant current source electrode, and a charge clamp circuit detecting circuit transceiving , the second terminal of the electrode; said constant current source to the electrode of the output of a constant current value; end of the clamp circuit so that the potential of the electrode is electrically connected to the constant potential defined; the charge detection circuitry transceiver output of the charge or receive charge, and detect or receive an amount of output charge, the amount of the charge output from the quantization capacitor variation; B. transceiver charge detecting circuit detects whether the charge output; if the charge output, the output charge of a first quantization since the amount of capacitance variation, then step C; export if there is no charge, perform step E; C. constant current source connected to the second end of the electrode, and a charge clamp circuit detecting a transceiver 路,将该电极的第一端接地; D. 电荷收发检测电路量化电荷输出量为第二自电容变化量; E. 针对所述电极的自电容变化检测结束; 基于以上步骤A至E,所述方法包括如下步骤, F. 当一个触碰点令K个电极的自电容发生变化时,获取到涉及该触碰点的K对自电容变化量,即2K个自电容变化量; G. 选择2K个自电容变化量中最大的一个; 该最大自电容变化量所属电极是沿第二方向的第T个电极,该最大自电容变化量是所述第T个电极的第一自电容变化量,即DTU,第T个电极的另一个自电容变化量是该电极的第二自电容变化量,即DTV, 从而第T个电极沿第二方向两侧电极各自的第一自电容变化量分别是D(T+l )U,D(T+2) U,…,D(T+W1)U,以及D(T-1)U,D(T-2)U,…,D(T-W2)U;第二自电容变化量分别是D(T+1)V,D (T+2)V,…,D(T+W1)V,以及D(T-1)V,D(T-2)V,…,D(T-W2)V,W1+W2+1=K; H. 若各 Way, the first grounded electrode; D. transceiver detects the charge amount of the charge output quantization circuit from a second capacitance variation; from E. end for detecting a capacitance change of the electrode; Based on the above steps A to E, the said method comprising the steps of, F. when a touch point so that the K electrodes from change in the capacitance, obtained K relates the touch point from the capacitance variation, i.e., a self-capacitance variation 2K; G. selected 2K a self-capacitance of a largest amount of change; the amount of change in the maximum self-capacitance electrode belongs to the first electrode in the second direction T, which is the maximum amount of change of the self-capacitance of the T of the first electrode from the capacitance variation , i.e. the DTU, the other electrode of the self-capacitance of T change amount is the second amount of change in self-capacitance of the electrode, i.e., a DTV, so that respective first self-capacitance variation T electrode of the second direction on both sides of electrodes It is D (T + l) U, D (T + 2) U, ..., D (T + W1) U, and D (T-1) U, D (T-2) U, ..., D (T- W2) U; self-capacitance of the second variation are the D (T + 1) V, D (T + 2) V, ..., D (T + W1) V, and D (T-1) V, D (T -2) V, ..., D (T-W2) V, W1 + W2 + 1 = K; H. when each 极沿第一方向的长度是XO,沿第二方向的长度是YO,那么步骤A所述触碰点沿第二方向坐标Y是, A first electrode along the length direction XO, the length in the second direction is YO, then step A the touch point coordinate in the second direction Y is
Figure CN103699278BC00041
步骤A所述触碰点沿第一方向横向坐标X是, A step of the touch point along the first direction X transverse coordinate is
Figure CN103699278BC00042
16.根据权利要求15所述的触碰点坐标数据处理方法,其特征在于: 步骤A所述恒流源向电极输出的恒定电流值是I,所述钳位电路令所电连接电极的一端的电位限定的恒定电位是VI,那么应当满足V1/I=R,R是钳位电路和恒流源所电连接电极的电阻。 16. The touch point coordinate data 15 of the processing method according to claim, wherein: in step A the end of the constant current source is electrically I, the clamp circuit connected to the electrodes so that a constant current value to the output electrode the potential of the constant potential is defined VI, it should satisfy V1 / I = R, R is the resistance of the connection electrode clamp circuit and a constant current power source.
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