CN101887336A - Multipoint touch device and method for carrying out multipoint touch detection on same - Google Patents

Multipoint touch device and method for carrying out multipoint touch detection on same Download PDF

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CN101887336A
CN101887336A CN 201010232833 CN201010232833A CN101887336A CN 101887336 A CN101887336 A CN 101887336A CN 201010232833 CN201010232833 CN 201010232833 CN 201010232833 A CN201010232833 A CN 201010232833A CN 101887336 A CN101887336 A CN 101887336A
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touch
signal
circuit
detection
multi
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CN 201010232833
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Chinese (zh)
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李兵
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汉王科技股份有限公司
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 -G06F3/045
    • G06F2203/04104Multi-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

Abstract

The invention provides a multipoint touch device and a method for carrying out multipoint touch detection on the same, belonging to the field of touch of touch screens. The multipoint touch device comprises a touch screen, a signal detection unit, a processor and a storage, wherein the processor controls the signal detection unit to carry out self-capacitance detection on the touch screen and stores the detected real touch point and the detected ghost point into the storage; the processor controls the signal detection unit to carry out mutual capacitance on the real touch point and the ghost point to obtain a real touch point. The invention can effectively remove the ghost point and remarkably lower the scanning times on a coil induction line, thereby remarkably shortening the detection time, increasing the detection speed and the touch reaction speed, and being widely applied to the field of the touch of the touch screens.

Description

多点触控装置及对其进行多点触控检测的方法 The method of multi-touch device, and its multi-touch detection

技术领域 FIELD

[0001] 本发明涉及触控装置及对其进行触控检测的方法,具体地涉及多点触控装置及对其进行多点触控检测的方法,属于触控屏触控领域。 [0001] The present invention relates to a touch device and a method for its touch detection, in particular to a multi-touch device, and its multi-touch detection, touch screen belonging to the touch area.

背景技术 Background technique

[0002] 触控技术包括电压触控技术和电容触控技术。 [0002] The touch touch technology and technique includes a voltage capacitive touch technology. 电容触控技术包括表面电容触控技术和投射电容触控技术。 Capacitive touch surface comprises a capacitive touch technology techniques and projected capacitive touch technology. 表面电容触控技术适用于大尺寸的电容触摸屏,进行模拟式电容触控输入,只能识别单点电容触控。 Surface capacitive touch technology for large-sized capacitive touch screen, capacitive touch analog input, only a single capacitive touch recognition. 投射电容触控技术适用于小尺寸的电容触摸屏,可以实现多点电容触控功能。 Projected capacitive touch technology is applicable to a small-sized capacitive touch screen can be multi-function capacitive touch.

[0003] 就技术原理而言,目前有两种方式可实现投射电容触控检测,达到实现多点触控的目的,一种是自电容型(self capacitance,也称absolute capacitance),另一种为互电容型(mutual capacitance,也称transcapacitance)。 [0003] In terms of technical principles, there are two ways projected capacitive touch detection may be implemented to achieve the purposes of multi-touch, one is from the capacitive type (self capacitance, also called absolute capacitance), another a mutual capacitance type (mutual capacitance, also known as transcapacitance). 自电容型是在触控物与电极之间产生电容耦合,并通过量测电极上的电容变化以确定触碰是否发生;互电容型则是当触碰发生时,会在邻近两层电极间产生电容耦合现象。 Capacitive type is generated from capacitive coupling between the touch object and the electrode, and by measuring the change in capacitance electrodes to determine whether a touch occurs; is a mutual capacitance-type touch occurs when, between adjacent two layers of electrodes may capacitive coupling phenomenon.

[0004] 目前,在多点电容触控应用中,大部分电容触控芯片厂商主要采用的是自电容检测方式。 [0004] Currently, capacitive touch multipoint applications, most of the capacitive touch chip manufacturers are mainly self-capacitance detection method. 以两轴扫描为例,两个触控点将分别在X轴与Y轴各产生两个波峰,交会起来将产生四个触点,其中两个点是鬼点(Ghost point),这将造成系统无法进行正确判读。 A two-axis scanning, for example, two touch points are generated in each of the X and Y axes of the two peaks, it will have four contacts intersection, two points where a ghost point (Ghost point), which will result in The system can not be properly interpreted. 鉴于此,采用自电容检测方式,只能完成某些特定动作,例如,拉伸、缩放、旋转等,无法真正的把多点触控中的所有触控点的精确坐标计算出来,达到十指同时电容触控的效果。 In view of this, the use of self-capacitance detection method, only to complete certain actions, e.g., stretching, scaling, rotation, etc., can not be calculated accurately the real coordinates of all touch points in a multi-touch, while the fingers reach effects of capacitive touch.

[0005] 目前解决鬼点问题的方法主要有分时法,分区法,但这些方法操作复杂,实用性不高。 [0005] Current methods to solve the problem of ghost points are mainly time-sharing law, zoning laws, but these methods are complex operations, practicality is not high. 若直接采用互电容检测方式进行多点电容触控识别,将造成检测时间过长、触控反应慢等缺点。 If direct detection method using a mutual capacitance multi-point capacitive touch recognition, the detection time is too long will cause disadvantages, touch response slow. 目前还有一些厂商通过另外增加一轴,专用于消除鬼点,但这样做的话硬件成本会很高,因为每增加一层,都将增加触控面板的厚度、重量与成本,这都不是便携式产品乐见的结果。 There are still a number of vendors through an additional axis, dedicated to the elimination of ghost points, but to do so the hardware cost will be high, because each additional layer, will increase the thickness, weight and cost of the touch panel, which is not portable We would like to see the results of the product.

发明内容 SUMMARY

[0006] 为解决上述技术问题,本发明提供了一种多点触控装置及对其进行多点触控检测的方法。 [0006] In order to solve the above technical problem, the present invention provides a multi-touch device and its method of detecting touch points.

[0007] 本发明的多点触控装置,包括触控屏、信号检测单元、处理器和存储器,其中,处理器控制信号检测单元对触控屏进行自电容检测,将所检测到的真实触控点和鬼点存储在存储器中;处理器控制信号检测单元对真实触控点和鬼点进行互电容检测,得到真实触控点。 [0007] The multi-touch device according to the present invention, includes a touch screen, a signal detection unit, a processor and a memory, wherein the processor of the control signal detection unit for self-capacitance touch screen is detected, the detected real touchup control points and ghost points stored in the memory; processor control signal detection unit and the touch point of the real ghost mutual capacitance detection points, to obtain the true touch points.

[0008] 在本发明的对多点触控装置进行多点触控检测的方法中,多点触控装置包括触控屏、信号检测单元、处理器和存储器,其中,多点触控检测方法包括:由处理器控制信号检测单元对触控屏进行自电容检测,并将所检测到的真实触控点和鬼点存储在存储器中;由处理器控制信号检测单元对真实触控点和鬼点进行互电容检测,得到真实触控点。 [0008] In the method for multi-touch multi-touch detection apparatus according to the present invention, the multi-touch device comprises a touch screen, a signal detection unit, a processor and a memory, wherein the multi-touch detection method comprising: a touch screen for self capacitance detection signal detection unit controlled by the processor, and the detected actual touch points and ghost points are stored in a memory; signal detection unit of the true touch points and ghost controlled by the processor mutual capacitance detection point, to give the true touch points.

[0009] 本发明结合自电容检测方法及互电容检测方法各自的优点,当多点触控的时候,先采用自电容检测方法得出真实触控点及鬼点,然后,在互电容检测中,只需对上述真实触控点和进行检测,而不是对所有点重新进行检测。 [0009] The present invention incorporates a self-capacitance and the mutual capacitance detection method for detecting respective advantages, when the multi-touch when the first capacitance detection method derived from the use of real and ghost touch point, then, in the mutual capacitance detection just real touch points and above for testing, rather than all points re-tested. 这样,既去除只进行自电容检测的情形下出现的鬼点,得到真实触控点;也避免了不进行自电容检测、只进行互电容检测的情形下检测时间过长、触控反应慢的问题。 In this way, removal of ghost points occurring case only be detected by the self-capacitance, to obtain the true touch points; avoids self-capacitance detection is not performed, for the case where only the detection time is too long mutual capacitance detection touch slow response problem.

附图说明 BRIEF DESCRIPTION

[0010] 图1是本发明的多点触控装置的一个实施例的结构框图。 [0010] FIG. 1 is a block diagram of one embodiment of the multi-touch device of the present invention.

[0011] 图2是本发明的一个实施例的触摸屏的构成以及与信号检测单元的连接关系的框图。 [0011] FIG. 2 is a block diagram showing a configuration of a touch screen and a connection relationship with one embodiment of the present invention, the signal detection unit.

[0012] 图3是本发明的一个实施例的线圈和信号检测单元的构成和连接关系的框图。 [0012] FIG. 3 is a block diagram showing a configuration and connection relationship of the coil and the signal detecting unit according to the embodiment of the present invention.

[0013] 图4是本发明的一个实施例的第一信号检测电路的结构框图。 [0013] FIG. 4 is a block diagram of a signal detecting circuit of the first embodiment of the present invention.

[0014] 图5是本发明的一个实施例的第一信号检测电路的电路图。 [0014] FIG. 5 is a circuit diagram of a first embodiment of the signal detection circuit of the embodiment of the present invention.

[0015] 图6是本发明的多点触控检测方法的一个实施例的流程图。 [0015] FIG. 6 is a flowchart of an embodiment of the multi-touch detecting method of the present invention.

[0016] 图7是本发明的一个实施例的多点触控检测方法中自电容检测过程的流程图。 [0016] FIG. 7 is a flowchart illustrating a multi-touch detecting method of the embodiment of the present invention, the self-capacitance of the detection process.

[0017] 图8是本发明的一个实施例的多点触控检测方法中互电容检测过程的流程图。 [0017] FIG 8 is a flowchart illustrating a multi-touch detecting method of the present embodiment of the invention the mutual capacitance detection process.

具体实施方式 detailed description

[0018] 下面,结合附图详细说明本发明的具体实施方式。 [0018] Next, with reference to specific embodiments of the present invention will be described accompanying drawings.

[0019] 如图1所示,本发明的一个实施例的多点触控装置,包括触控屏1、信号检测单元2、处理器3和存储器4,其中,处理器3控制信号检测单元2对触控屏1进行自电容检测,将所检测到的真实触控点和鬼点存储在存储器4中;处理器3控制信号检测单元2对真实触控点和鬼点进行互电容检测,得到真实触控点。 [0019] As shown, the multi-touch device 1 of one embodiment of the present invention, comprising a touch screen, the signal detection unit 2, a processor 3 and a memory 4, wherein the processor 3 controls the signal detecting unit 2 1 on the touch screen self-capacitance detection, the true touch points and the detected ghost points stored in the memory 4; 32 for detection of the mutual capacitance of the touch points and ghost points real control signal detection unit processor, to give real touch points.

[0020] 如图2所示,触控屏1包括线圈6,用于感应触控信号。 [0020] As shown, the touch screen 12 includes a coil 6 for sensing a touch signal. 在处理器3的控制下,信号检测单元2通过线圈6对触控屏1进行自电容检测和互电容检测。 Under the control of the processor 3, the signal detecting unit 2 detects the self-capacitance and the mutual capacitance is detected by a coil 6 on the touch screen.

[0021] 优选的,如图3所示,信号检测单元2包括第一信号检测电路21和第二信号检测电路22,线圈6包括横向线圈61和纵向线圈62,第一信号检测电路21连接横向线圈61, 第二信号检测电路22连接纵向线圈62。 [0021] Preferably, as shown in FIG. 3, a first signal detecting unit 2 includes a signal detection circuit 21 and the second signal detection circuit 22, the coil 6 and the coil 61 comprises a longitudinal lateral coil 62, a first signal detection circuit 21 is connected laterally coil 61, the second signal detection circuit 22 connected to the coil 62 longitudinally. 第一信号检测电路21通过横向线圈61检测触控屏1上触控点的横向坐标,第二信号检测电路22通过纵向线圈62检测触控屏1上触控点的纵向坐标。 21 by the lateral coordinates of the touch point transverse coil 61 detects a touch screen, a second longitudinal coordinate signal detecting circuit 22 by the first signal detecting circuit 62 detects the touch point of the touch screen wales 1.

[0022] 以触控屏1的横向线圈61具有M条感应线、纵向线圈62具有N条感应线的情形为例,说明本实施例的多点触控装置的工作过程。 [0022] The touch screen has a transverse coil 611 of the M sense lines, the longitudinal direction of the coil case 62 having N sense lines to illustrate the working process of the multi-touch device according to the present embodiment.

[0023] 处理器3控制第一信号检测电路21和第二信号检测电路22首先分别对横向线圈61和纵向线圈62进行自电容检测,其中,在进行自电容检测时,横向线圈61的每条感应线和纵向线圈62的每条感应线均只需扫描一次,因此,需要对从横向线圈61的M条感应线和纵向线圈62的N条感应线总共进行M+N次扫描,并由处理器3对扫描采集到的信号进行处理,处理完成之后将得到真实触控点和鬼点的坐标值,但无法将真实触控点与鬼点分开。 [0023] The processor 3 controls the first signal and the second signal detection circuit 21 first detection circuit 22 and the coil 61 are transverse the longitudinal self-capacitance detection coil 62, wherein, when performing the self-capacitance detection, each transverse coil 61 induction coil 62 and the longitudinal line of each scan once sensing lines are, therefore, necessary to the coil 61 from the horizontal line M of sensing coil 62 and the longitudinal sense lines for a total of N M + N scan by the processing 3 scanning the collected signals are processed, the processing is completed after the coordinate values ​​obtained true touch points and ghost points, but can not be separated from true touch points and ghost points. 因此,无法识别多点触控位置的真实坐标值。 Therefore, it does not recognize the multi-point real coordinate values ​​of the touch location. 这样,经过自电容检测,还不足以确定真实触控点的准确位置。 Thus, after the self-capacitance detection, not enough to determine the exact position of the real touch point.

[0024] 之后,处理器3控制第一信号检测电路21和第二信号检测电路22对自电容检测 After [0024] The processor 3 controls the first detection signal from the capacitance detection circuit 21 and second 22 pairs of signal detection circuit

5所检测到的真实触控点和鬼点进行互电容检测。 5 true touch points and ghost points detected for detection of the mutual capacitance.

[0025] 为便于理解,假如真实触控点的个数为2,互电容检测中将进行2*2 = 4次扫描; 假如真实触控点的个数为3,互电容检测中将进行3*3 = 9次扫描。 [0025] For ease of understanding, a 2 * 2 = 4 If the number of scans true touch points is 2, in the mutual capacitance detection; true for the number 3 if the touch point is 3, in the mutual capacitance detection * 3 = 9 scans. 之后,由处理器3对扫描采集到的信号进行处理,处理完成之后将得到真实触控点,而将鬼点去除。 Thereafter, the three pairs of scan acquisition signal processor, after the process is completed the resultant true touch points, and removing the ghost points.

[0026] 在现有技术中,不采用自电容检测与互电容检测向结合的方案,而是仅利用互电容检测,为避免出现鬼点,对横向线圈61的M条感应线和纵向线圈62的N条感应线均需进行扫描,因此,扫描次数将高达M*N次,比本发明的(M+N)+4次或(M+N)+9次显然高出一个数量级。 [0026] In the prior art, is not self capacitance and mutual capacitance detection to detect binding of the embodiments, but only by the mutual capacitance detection, to avoid ghost points, the coil 61 of the transverse lines M of sensing coil 62 and the longitudinal the required N sense lines are scanned, therefore, the number of scans up to M * N times, +9 times than the present invention (M + N) +4 times or (M + N) is clearly an order of magnitude.

[0027] 也就是说,采用本发明的多点触控装置,既能够有效去除鬼点,又能够显著降低对线圈感应线的扫描次数,从而显著缩短检测时间,加快检测速度和触控反应速度。 [0027] That is, multi-touch device of the present invention, not only can effectively remove a ghost point, and can significantly reduce the number of scanning lines of the induction coil, thereby significantly reducing the detection time, the touch detection speed and to accelerate the reaction rate .

[0028] 优选的,如图4所示,第一信号检测电路21具体包括电容触控信号采集电路7、比较器电路8和滤波处理电路9。 [0028] Preferably, as shown in FIG. 4, a first signal detection circuit 21 comprises a capacitive touch signal acquisition circuit 7, the comparator circuit 8 and the filter processing circuit 9.

[0029] 电容触控信号采集电路7通过线圈6从触控屏1采集电容触控信号,比较器电路8 将采集到的信号与参考电压信号相比较,滤波处理电路9将比较器电路8输出的信号进行滤波,得到有效检测信号。 [0029] The capacitive touch signal acquisition circuit 7 by a coil 6 a touch screen capacitive touch signal acquisition, the comparator circuit 8 from the collected signal is compared with a reference voltage signal, filter processing circuit 9 to the comparator circuit 8 outputs the signal is filtered, to obtain effective detection signal.

[0030] 图5中示出了信号检测电路21的具体电路的一个例子。 [0030] FIG. 5 shows an example of a specific circuit in the signal detecting circuit 21. 在图5上部,从右至左依次示出了电容触控信号采集电路7、比较器电路8和滤波处理电路的具体电路结构。 In the upper portion of FIG. 5, right to left 7 shows a specific circuit configuration of the comparator circuit 8 and the filter processing circuit capacitive touch signal acquisition circuit. 在图5 的下部为电容触控信号采集电路7的具体电路结构。 Acquisition specific circuit structure of a capacitive touch circuit 7 of FIG. 5 in the lower portion of the signal.

[0031] 优选的,第二信号检测电路22采用与第一信号检测电路21相同的电路。 [0031] Preferably, the second signal detection circuit 22 employs the same circuit as the first signal detection circuit 21.

[0032] 如图6所示,在本发明的一个实施例的对多点触控装置进行多点触控检测的方法中,多点触控装置包括如图1所示的触控屏1、信号检测单元2、处理器3和存储器4,其中, 多点触控检测方法包括:步骤Si,由处理器3控制信号检测单元2对触控屏1进行自电容检测,并将所检测到的真实触控点和鬼点存储在存储器4中;步骤S2,由处理器3控制信号检测单元2对真实触控点和鬼点进行互电容检测,得到真实触控点。 [0032] As shown in FIG 6, a method for multi-touch detection apparatus for multi-touch in one embodiment of the present invention, the multi-touch device comprises a touch screen shown in FIG. 11, signal detecting unit 2, a processor 3 and a memory 4, wherein the multi-touch detecting method comprising the steps of: Si, self capacitance detection by the processor 3 controls the signal detecting unit 2 on the touch panel 1, and detected true touch points and ghost points are stored in the memory 4; step S2, a mutual capacitance detected by the touch point 32 and the real ghost detection unit a control signal processor, to give the true touch points.

[0033] 优选的,如图2所示,触控屏1包括线圈6,自电容检测和互电容检测包括由信号检测单元2通过线圈6检测触控屏1。 [0033] Preferably, as shown, the touch screen 12 includes a coil 6, the self-capacitance and the mutual capacitance detection signal detected by the detecting means comprises a coil 2 through 6 detects a touch screen.

[0034] 优选的,如图3所示,信号检测单元2包括第一信号检测电路21和第二信号检测电路22,线圈6包括纵向线圈62和横向线圈61,第一信号检测电路21连接横向线圈61,第二信号检测电路22连接纵向线圈62。 [0034] Preferably, as shown in FIG. 3, a first signal detecting unit 2 includes a signal detection circuit 21 and the second signal detection circuit 22, the coil 6 and the coil 62 comprises a longitudinal lateral coil 61, a first signal detection circuit 21 is connected laterally coil 61, the second signal detection circuit 22 connected to the coil 62 longitudinally.

[0035] 仍以触控屏的横向线圈61具有M条感应线、纵向线圈62具有N条感应线的情形为例,说明本实施例的多点触控检测方法的具体过程。 [0035] still touch screen 61 having a transverse coil M sense lines, N longitudinal coil 62 having a case of sensing lines to illustrate specific process multi-touch detecting method of the present embodiment.

[0036] 处理器3控制第一信号检测电路21和第二信号检测电路22首先分别对横向线圈61和纵向线圈62进行自电容检测,其中,在进行自电容检测时,横向线圈61的每条感应线和纵向线圈62的每条感应线均只需扫描一次,因此,需要对从横向线圈61的M条感应线和纵向线圈62的N条感应线总共进行M+N次扫描,并由处理器3对扫描采集到的信号进行处理,处理完成之后将得到真实触控点和鬼点的坐标值,但无法将真实触控点与鬼点分开。 [0036] The processor 3 controls the first signal and the second signal detection circuit 21 first detection circuit 22 and the coil 61 are transverse the longitudinal self-capacitance detection coil 62, wherein, when performing the self-capacitance detection, each transverse coil 61 induction coil 62 and the longitudinal line of each scan once sensing lines are, therefore, necessary to the coil 61 from the horizontal line M of sensing coil 62 and the longitudinal sense lines for a total of N M + N scan by the processing 3 scanning the collected signals are processed, the processing is completed after the coordinate values ​​obtained true touch points and ghost points, but can not be separated from true touch points and ghost points. 因此,无法识别多点触控位置的真实坐标值。 Therefore, it does not recognize the multi-point real coordinate values ​​of the touch location. 这样,经过自电容检测,还不足以确定真实触控点的准确位置。 Thus, after the self-capacitance detection, not enough to determine the exact position of the real touch point.

[0037] 之后,处理器3控制第一信号检测电路21和第二信号检测电路22对自电容检测所检测到的真实触控点和鬼点进行互电容检测。 After [0037] The processor 3 controls the first signal detecting circuit 21 and 22 detect the mutual capacitance detecting the self-capacitance of the detected touch points and ghost points true second signal detection circuit.

[0038] 为便于理解,假如真实触控点的个数为2,互电容检测中将进行2*2 = 4次扫描; 假如真实触控点的个数为3,互电容检测中将进行3*3 = 9次扫描。 [0038] For ease of understanding, a 2 * 2 = 4 If the number of scans true touch points is 2, in the mutual capacitance detection; true for the number 3 if the touch point is 3, in the mutual capacitance detection * 3 = 9 scans. 之后,由处理器3对扫描采集到的信号进行处理,处理完成之后将得到真实触控点,而将鬼点去除。 Thereafter, the three pairs of scan acquisition signal processor, after the process is completed the resultant true touch points, and removing the ghost points.

[0039] 在现有技术中,不采用自电容检测与互电容检测相结合的方案,而是仅利用互电容检测,为避免出现鬼点,对横向线圈61的M条感应线和纵向线圈62的N条感应线均需进行扫描,因此,扫描次数将高达M*N次,比本发明的(M+N)+4次或(M+N)+9次显然高出一个数量级。 [0039] In the prior art, is not self capacitance and mutual capacitance detector detecting a combination of embodiments, but only by the mutual capacitance detection, to avoid ghost points, the coil 61 of the transverse lines M of sensing coil 62 and the longitudinal the required N sense lines are scanned, therefore, the number of scans up to M * N times, +9 times than the present invention (M + N) +4 times or (M + N) is clearly an order of magnitude.

[0040] 也就是说,采用本发明的多点触控检测方法,既能够有效去除鬼点,又能够显著降低对线圈感应线的扫描次数,从而显著缩短检测时间,加快检测速度和触控反应速度。 [0040] That is, the present invention is a multi-touch detecting method, not only can effectively remove a ghost point, and can significantly reduce the number of scanning lines of the induction coil, thereby significantly reducing the detection time, the touch detection speed and to accelerate the reaction speed.

[0041] 优选的,在本发明的上述实施例的对多点触控装置进行多点触控检测的方法中, 如图4所示,第一信号检测电路21包括电容触控信号采集电路7、比较器电路8和滤波处理电路9 ;优选的,第二信号检测电路22采用与第一信号电路相同的电路;如图7所示,自电容检测包括:步骤S11,由电容触控信号采集电路7从线圈6 (如图2所示)采集信号;步骤S12,由比较器电路8将采集到的信号与参考电压信号相比较;步骤S13,由滤波处理电路9 将比较器电路8输出的信号进行滤波;以及步骤S14,由处理器3 (如图1所示)对经滤波的信号进行处理,以得到真实触控点和鬼点。 [0041] Preferably, in the method for multi-touch device is a multi-touch detected by the embodiment of the present invention, shown in Figure 4, a first signal detection circuit 21 includes a capacitive touch signal acquisition circuit 7 , the comparator circuit 8 and the filter processing circuit 9; preferably, the second signal detection circuit 22 employs the same circuit as the first signal circuit; 7, since the capacitance detecting comprising: a step S11, and the capacitive touch signal acquisition acquisition circuit 7 from the coil 6 (Figure 2) signal; a step S12, the comparator circuit 8 to the collected signal is compared with a reference voltage signal; step S13, the processing by the filter circuit 9 output from the comparator circuit 8 signal is filtered; and step S14, processing the filtered signal from the processor 3 (FIG. 1), to give the true touch points and ghost points.

[0042] 优选的,如图8所示,结合图1、图2,互电容检测包括:步骤S21,由电容触控信号采集电路7从真实触控点和鬼点采集信号;步骤S22,由比较器电路8将采集到的信号与参考电压信号相比较;步骤S23,由滤波处理电路9将比较器电路8输出的信号进行滤波;以及步骤S24,由处理器3对经滤波的信号进行处理,以得到真实触控点。 [0042] Preferably, as shown in FIG. 8, in conjunction with FIGS. 1 and 2, the mutual capacitance detection comprising: a step S21, the capacitive touch signal from the acquisition circuit 7 from the true touch points and ghost points acquisition signal; a step S22, the a the comparator circuit 8 signals the collected signal is compared with a reference voltage; step S23, the signal processing circuit by the filter circuit 9 compares the output from filter 8; and a step S24, the processing the filtered signal by the processor 3 pairs to get the real touch points.

[0043] 优选的,在上述实施例的多点触控装置及对其进行多点触控检测的方法中,进行自电容检测以及进行互电容检测时,在扫描采集到信号之后,处理器3可以进行滤波计算、 抗干扰计算等,以提高信号质量;并进行插值计算等,以提取有效信号。 After the time [0043] Preferably, the multi-touch device in the method of the above embodiments and their multi-touch detection, as well as self capacitance detection mutual capacitance detection, the scanning signal is acquired, the processor 3 filter calculation may be performed, interference calculation to improve signal quality; interpolation calculation and the like, to extract the valid signal. 滤波计算优选为平均值滤波,插值计算优选为二次插值。 Calculated as the average filter is preferably filtered, preferably interpolation quadratic interpolation.

Claims (9)

  1. 一种多点触控装置,其特征在于,包括触控屏、信号检测单元、处理器和存储器,其中,所述处理器控制所述信号检测单元对所述触控屏进行自电容检测,将所检测到的真实触控点和鬼点存储在所述存储器中;所述处理器控制所述信号检测单元对所述真实触控点和鬼点进行互电容检测,得到真实触控点。 A multi-touch device, comprising a touch screen, a signal detection unit, a processor and a memory, wherein the processor controls the signal detection unit of the self-capacitance touch screen detection, the detected actual touch points and ghost points are stored in the memory; the processor controls the signal detecting unit of the real touch points and ghost points mutual capacitance detection, to obtain the true touch points.
  2. 2.根据权利要求1所述的多点触控装置,其特征在于,所述触摸屏具有线圈,所述自电容检测和互电容检测包括由所述信号检测单元通过所述线圈检测所述触控屏。 2. The multi-touch device according to claim 1, wherein the touch screen has a coil, the coil from the detection signal of the touch by said detecting means detects capacitance and mutual capacitance detecting comprises Screen.
  3. 3.根据权利要求2所述的多点触控装置,其特征在于,所述信号检测单元包括第一信号检测电路和第二信号检测电路,所述线圈包括纵向线圈和横向线圈,所述第一信号检测电路连接所述横向线圈,所述第二信号检测电路连接所述纵向线圈。 3. The multi-touch device according to claim 2, wherein said signal detecting means comprises a first signal and the second signal detection circuit detecting circuit, said coil comprising a coil and a transverse longitudinal coil, the first a signal detection circuit connected to the transverse coil, the second signal detection circuit connected to said coil longitudinally.
  4. 4.根据权利要求3所述的多点触控装置,其特征在于:所述第一信号检测电路和第二信号检测电路至少一个包括电容触控信号采集电路、比较器电路和滤波处理电路;所述电容触控信号采集电路通过所述线圈从所述触控屏采集信号,所述比较器电路将所述采集到的信号与参考电压信号相比较,所述滤波处理电路将所述比较器电路输出的信号进行滤波,得到有效检测信号。 4. The multi-touch device according to claim 3, wherein: said first signal and the second signal detection circuit detecting circuit having at least a touch signal acquisition circuit comprises a capacitor, a comparator circuit and a filter processing circuit; the capacitive touch signal acquisition circuit signal acquisition from the touch screen, the comparator circuit to the acquired signal through the coil signal is compared with a reference voltage, said filtering process of the comparator circuit filtering the output signal circuit, effective detection signal.
  5. 5. 一种对多点触控装置进行多点触控检测的方法,其特征在于,所述多点触控装置包括触控屏、信号检测单元、处理器和存储器,其中,所述多点触控检测方法包括:由所述处理器控制所述信号检测单元对所述触控屏进行自电容检测,并将所检测到的真实触控点和鬼点存储在所述存储器中;以及由所述处理器控制所述信号检测单元对所述真实触控点和鬼点进行互电容检测,得到真实触控点。 A multi-touch device a method of detecting multi-touch, characterized in that the multi-touch device comprises a touch screen, a signal detection unit, a processor and a memory, wherein said multi-point the touch detection method comprising: the self-capacitance touch screen is detected by the processor to control the signal detecting unit and the detected actual touch points and ghost points stored in said memory; and the the processor controls the signal detection unit of the real touch points and ghost points mutual capacitance detection, to obtain the true touch points.
  6. 6.根据权利要求5所述的对多点触控装置进行多点触控检测的方法,其特征在于,所述触摸屏具有线圈,所述自电容检测和互电容检测包括由所述信号检测单元通过所述线圈检测所述触控屏。 6. The method of detecting multi-touch multi-touch device according to claim 5, characterized in that the touch screen has a coil, the self-capacitance and the mutual capacitance detecting comprises detecting by the signal detection unit the detecting coil by the touch screen.
  7. 7.根据权利要求6所述的对多点触控装置进行多点触控检测的方法,其特征在于,所述信号检测单元包括第一信号检测电路和第二信号检测电路,所述线圈包括纵向线圈和横向线圈,所述第一信号检测电路连接所述横向线圈,所述第二信号检测电路连接所述纵向线圈。 The method of detecting multi-touch multi-touch device according to claim 6, wherein said signal detecting means comprises a first signal and the second signal detection circuit detecting circuit, said coil comprising longitudinal and transverse coil of the coil, the first signal detecting circuit connected to the transverse coil, the second signal detection circuit connected to said coil longitudinally.
  8. 8.根据权利要求7所述的对多点触控装置进行多点触控检测的方法,其特征在于,所述第一信号检测电路和第二信号检测电路至少一个包括电容触控信号采集电路、比较器电路和滤波处理电路,所述自电容检测包括:由所述电容触控信号采集电路通过所述线圈从所述触控屏采集信号;由所述比较器电路将所述采集到的信号与参考电压信号相比较;由所述滤波处理电路将所述比较器电路输出的信号进行滤波;以及由所述处理器对所述经滤波的信号进行处理,以得到真实触控点和鬼点。 8. A method for multi-touch multi-touch detecting device according to claim 7, wherein said first signal detection circuit and at least a second signal detection circuit comprises a capacitive touch signal acquisition circuit , the comparator circuit and the filter processing circuit, the self capacitance detection comprising: collecting signals from the coils of the touch screen by the signal acquisition circuit through capacitive touch; by the comparator circuit of the collected voltage signal and a reference signal is compared; the output signal of the comparator circuit is filtered by the filter processing circuit; and processing the filtered signal by the processor, to obtain the true touch points and ghost point.
  9. 9.根据权利要求8所述的对多点触控装置进行多点触控检测的方法,其特征在于,所述互电容检测包括:由所述电容触控信号采集电路从所述真实触控点和鬼点采集信号; 由所述比较器电路将所述采集到的信号与参考电压信号相比较; 由所述滤波处理电路将所述比较器电路输出的信号进行滤波;以及由所述处理器对所述经滤波的信号进行处理,以得到真实触控点。 9. A method for multi-touch multi-touch detecting device according to claim 8, characterized in that the mutual capacitance detection comprising: a signal acquisition circuit of the capacitive touch from the touch real point and the ghost signal acquisition; by the comparator circuit of the collected signal is compared with a reference voltage signal; the output signal of the comparator circuit is filtered by the filter processing circuit; and by the processing is the filtered signal is processed to obtain the true touch points.
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