WO2016106832A1 - 自电容触摸感测装置及触摸点定位方法、显示设备 - Google Patents

自电容触摸感测装置及触摸点定位方法、显示设备 Download PDF

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WO2016106832A1
WO2016106832A1 PCT/CN2015/070543 CN2015070543W WO2016106832A1 WO 2016106832 A1 WO2016106832 A1 WO 2016106832A1 CN 2015070543 W CN2015070543 W CN 2015070543W WO 2016106832 A1 WO2016106832 A1 WO 2016106832A1
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sensor
column
sensors
row
touch
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French (fr)
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叶成亮
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads

Definitions

  • the present invention relates to the field of self-capacitive touch screen technologies, and in particular, to a self-capacitance touch sensing device, a touch point positioning method, and a display device.
  • the capacitive screen has been widely used as never before.
  • the capacitive screen has superior sensitivity and multi-touch function, especially in games, camera and other applications, making the operation of various related hardware devices more user-friendly.
  • the projected capacitive screen can be divided into two types: self-capacitive screen and mutual capacitive screen.
  • the self-capacitance screen is made of ITO (indium tin oxide, a transparent conductive film material) on the surface of the glass as a horizontal and vertical electrode array. These lateral and longitudinal electrodes respectively form a capacitance with the ground, that is, the so-called self-capacitance. That is, the capacitance of the electrode to the ground.
  • the capacitance of the finger will be superimposed on the screen capacitance, which increases the capacitance of the screen.
  • a flaw in the self-capacitance touch screen is the so-called "ghost point problem", which will be described in detail below.
  • FIG. 1 is an exemplary illustration of a conventional self-capacitance touch sensing device.
  • the structure shown in FIG. 1 has a total of 128 touch sensor pads in 8 rows and 8 columns, and mainly includes a glass substrate 1, a row sensor Y1-Y8, and column sensors X1-X8.
  • the line sensors Y2 and Y7 and the column sensors X2 and X7 respectively sense the two-point touch point due to the line sensors Y1-Y8.
  • the column sensors X1-X8 are full row or column sensing respectively, the intersections of the row sensors Y2 and Y7 and the column sensors X2 and X7 except for A and D, and B and C, the coordinates of the four intersections can be represented. It is A (X2, Y2), B (X7, Y2), C (X2, Y7), D (X7, Y7). Therefore, in addition to the actual touch points A and D, the device may misjudge that the B point and the C point also touch, and the B point and the C point which are actually not touched and are mistakenly judged as the touch point are referred to as "ghost points". On the other hand, if point B and point C are actual touch points, there are corresponding "ghost points" A and D points.
  • the present invention provides a touch point positioning method, which is mainly used for positioning a two-point touch point of a self-capacitive touch sensing device, and the positioning method can accurately determine a true touch point, effectively Exclude ghost points.
  • a touch point positioning method for positioning a two-point touch point of a self-capacitive touch sensing device comprising N row sensors and M column sensors crossing each other, wherein the method comprises :
  • + J is an end of a driving signal applied from the third sensor row Y n and Y n, Y n and the row sensor Y n + j detects the other end of the third driving signal; comparing the third driving signal line sensor Y n and Y n + j delay time, determining the touch point of the line sensors, and Y n Y n + j th column corresponding to the sensor is a X m or X m + i, ultimately determine the true touch points point; or: + i is applied to one end of a driving signal from the third sensor row X m and X m, X m in the column inductor and X m + i and the other end of the third detecting driving signal; comparing the first The delay time of the three drive signals in the column sensors X m and X m+i determines that the corresponding line sensor of the touch point on the column sensors X m and X m+i is Y n or Y n+
  • M and N are integers greater than 1, m, m+i ⁇ [1, M], n, n+i ⁇ [1, N].
  • Another aspect of the present invention provides a self-capacitive touch sensing device including N row sensors and M column sensors that intersect each other, wherein the device further includes a row control module and a column control module. And decision module, where:
  • the row control module sequentially applies a first driving signal to the N row sensors to determine the row sensors Y n and Y n+j having touch points;
  • the column control module sequentially applies a second driving signal to the M column sensors to determine column sensors X m and X m+i having touch points;
  • the end of row j + control module is further applied to a drive signal from the third sensor row Y n and Y n, Y n is the row induction and Y n + j is the other end of the third drive detecting signal; determining said The module compares the delay times of the third driving signals in the line sensors Y n and Y n+j , and determines that the corresponding column sensors of the touch points on the line sensors Y n and Y n+j are X m or X m +i , finally determining the true two-point touch point; or: the column control module also applies a third drive signal from one end of the column sensors X m and X m+i , in the column sensors X m and X m+ The other end of i detects the third driving signal; the determining module compares delay times of the third driving signals in the column sensors X m and X m+i to determine that the touch points are in the column sensors X m and X The
  • M and N are integers greater than 1, m, m+i ⁇ [1, M], n, n+i ⁇ [1, N].
  • the present invention also provides a display device including the self-capacitive touch sensing device as described above.
  • the candidate touch line sensor and the column sensor are acquired (in this case, two real touch points and two ghost points are sensed), and then the candidate is selected.
  • a touch point line sensor or column sensor provides another drive signal that detects the signal delay time (RC delay) of the drive signal transmitted in the line sensor or column sensor.
  • RC delay signal delay time
  • the sensor is divided into two resistors with different resistance values (the total resistance value is a fixed value), and the delay time of the driving signal is different, and the touch point is different. Near the input of the drive signal, the delay time of the drive signal is smaller. Therefore, the relative positions of the column sensors or the row sensors corresponding to the touch points on the two candidate row sensors or column sensors can be determined, and finally the coordinates of the actual touch points can be accurately determined, and the ghost points are effectively excluded.
  • FIG. 1 is an exemplary illustration of a conventional self-capacitance touch sensing device.
  • FIG. 2 is a structural block diagram of a self-capacitance touch sensing device according to Embodiment 1 of the present invention.
  • Embodiment 3 is an equivalent circuit diagram of applying a third driving signal to a line sensor in Embodiment 1 of the present invention.
  • FIG. 4 is a structural block diagram of a self-capacitance touch sensing device according to Embodiment 2 of the present invention.
  • FIG. 2 is a structural block diagram of a self-capacitance touch sensing device according to an embodiment of the present invention.
  • the touch sensing device includes a glass substrate 10, N line sensors Y 1 -Y N and M column sensors X 1 -X M crossing each other.
  • the line sensors Y n and Y n+j and the column sensors X m and X m+i sense the two-point touch point, respectively.
  • M and N are integers greater than 1, m, m+i ⁇ [1, M], n, n+i ⁇ [1, N].
  • the apparatus further comprises a line control module 20, control module 30 and column determination module 40, wherein: the control module 20 is applied to a first row drive signal to the N row sequentially sensors, sensors determine the line Y n with a touch point and Y n+j .
  • the column control module 30 sequentially applies a second driving signal to the M column sensors to determine column sensors X m and X m+i having touch points.
  • the decision module 40 is connected to the row control module 20 and the column control module 30, respectively, or the scan information of the row control module 20 and the column control module 30.
  • intersection of the line sensors Y n and Y n+j and the column sensors X m and X m+i has four A 1 -A 4 , and coordinates A 1 (X m , Y n ), A 2 can be used.
  • (X m+i , Y n ), A 3 (X m , Y n+j ) and A 4 (X m+i , Y n+j ) are represented, including two real touch points and two ghost points.
  • the line control module 20 also applies a third drive signal from one end of the line sensors Y n and Y n+j , at the line sensors Y n and Y n
  • the other end of +j detects the third driving signal;
  • the determining module 40 compares the delay time (RC delay) of the third driving signal in the line sensors Y n and Y n+j to determine that the touch point is in the line
  • the corresponding column sensor on the inductors Y n and Y n+j is X m or X m+i , and finally the true two-point touch point is determined. As shown in FIG.
  • the connection detecting the third driving signal can be connected to the row control module 20 through the switching element 21, and when the row control module 20 applies the first driving signal to the row sensor, the switching element 21 is turned off, and is performed. Capacitance detection; when the row control module 20 applies a third driving signal to the row sensor, the switching element 21 is closed to detect the delay time of the third driving signal.
  • the line sensor Y is divided into two resistors R1 and R2 with different resistance values by using the touch point as a division point (resistance resistance The sum of the values R1+R2 is a fixed value), and when the third driving signal input is applied to one end of the line sensor Y, the signal output detected at the other end of the line sensor Y has a delay time t,
  • (R1+R2) is the sum of the resistances of the line sensor Y, which is a fixed value;
  • C f is a finger touch capacitance, which is a fixed value;
  • C s is a self-capacitance of the line sensor Y, which is a fixed value. Therefore, in the above formula, the magnitude of the delay time t varies with the magnitude of the resistor R1. The closer the touch point is to the input end of the drive signal, the smaller the resistance R1 is, the smaller the delay time t of the drive signal is.
  • the row control module 20 applies a third driving signal from the row sensors Y n and Y n+j to the end of the column sensor for X 1 , at the row sensors Y n and Y n +j detects the third drive signal near the end of the column sensor for X M .
  • the determining module 40 compares the delay time of the third driving signal in the line sensors Y n and Y n+j if the delay time of the third driving signal in the line sensor Y n is smaller than the line sensor Y n + j delay time in, then the touch points on the line sensor is compared with the row Y n Y n + sensor touch point j on the input of the third closer to the drive signal.
  • the corresponding column sensor of the touch point on the line sensor Y n is X m
  • the touch point is in the line sensor Y
  • the corresponding column sensor on n+j is X m+i
  • the coordinates of the real two-point touch point are A1 (X m , Y n ) and A4 (X m+i , Y n+j ).
  • the delay time of the third driving signal in the line sensor Y n is greater than the delay time in the line sensor Y n+j , the touch point and the line sensor on the line sensor Y n are illustrated.
  • the touch points on Y n+j are further away from the input of the third drive signal.
  • the corresponding column sensor on Y n+j is X m
  • the coordinates of the real two-point touch point are A2 (X m+i , Y n ) and A3 (X m , Y n+j ).
  • the sensing value of the row sensor is detected, and if the detected sensing value is greater than a preset value, it is determined that the corresponding row sensor detects a touch point; when a driving signal is applied to the column sensor of the touch sensing device, detecting a sensing value of the column sensor, and if the detected sensing value is greater than a preset value, determining that the corresponding column sensor detects the touch point .
  • the sensing value is a capacitance value of the inductor.
  • the self-capacitive touch sensing device provided as above is mainly applied to a display device having a touch function.
  • the third driving signal is applied by the column control module 30 from one end of the column inductors Xm and Xm+i , in the column sensor Xm and The other end of X m+i detects the third driving signal; the determining module 40 compares the delay time of the third driving signal in the column sensors X m and X m+i to determine the touch point in the column sensor
  • the corresponding line sensor on X m and X m+i is Y n or Y n+j , which finally determines the true two-point touch point.
  • the connection detecting the third driving signal can be connected to the column control module 30 through the switching element 31.
  • the switching element 31 When the column control module 30 applies the second driving signal to the column sensor, the switching element 31 is turned off. Self-capacitance detection; when the column control module 30 applies a third driving signal to the column sensor, the switching element 31 is closed to detect the delay time of the third driving signal.
  • the third drive signal is detected by m+i near the end of the line sensor Y N .
  • the determining module 40 compares the delay time of the third driving signal in the column sensors X m and X m+i if the delay time of the third driving signal in the column sensor X m is smaller than the column sensor X m + i is the delay time, then the sensor in a column touch point X m is compared with the inductor in column X m + i touch point on the input of the third closer to the drive signal.
  • the line sensors Y n and Y n+j with touch points determined by the row control module 20 it can be determined that the corresponding line sensor of the touch point on the column sensor X m is Y n , and the touch point is in the column sensor.
  • X m + i corresponding to the sensor row Y n + j true coordinates for the two touch points A1 (X m, Y n) and A4 (X m + i, Y n + j).
  • the touch point and the column sensor on the column sensor X m are illustrated.
  • the touch point on X m+i is further away from the input of the third drive signal.
  • the corresponding line sensor Y n+j of the touch point on the column sensor X m can be determined, and the touch point is in the column sensor.
  • the sensing value of the row sensor is detected, and if the detected sensing value is greater than a preset value, it is determined that the corresponding row sensor detects a touch point; when a driving signal is applied to the column sensor of the touch sensing device, detecting a sensing value of the column sensor, and if the detected sensing value is greater than a preset value, determining that the corresponding column sensor detects the touch point .
  • the sensing value is a capacitance value of the inductor.
  • the self-capacitive touch sensing device provided as above is mainly applied to a display device having a touch function.
  • the embodiment of the present invention sequentially acquires a row sensor with a touch point and a column sensor by sequentially driving a row sensor and a column sensor (in this case, two real touch points and two ghost points are sensed). Then, another candidate driving signal is provided to the candidate touched line sensor or column sensor to detect the signal delay time (RC delay) of the driving signal transmitted in the line sensor or the column sensor.
  • RC delay signal delay time
  • the sensor is divided into two resistance values by using the touch point as a division point. The resistance (the sum of the resistance values is constant), the delay time of the drive signal is different, and the closer the touch point is to the input end of the drive signal, the smaller the delay time of the drive signal. Therefore, the relative positions of the column sensors or the row sensors corresponding to the touch points on the two candidate row sensors or column sensors can be determined, and finally the coordinates of the actual touch points can be accurately determined, and the ghost points are effectively excluded.

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Abstract

一种触摸点定位方法，用于自电容触摸感测装置的两点触摸点的定位，触摸感测装置包括相互交叉的N个行感应器（Y 1-Y N）和M个列感应器（X 1-X M），该方法包括：向N个行感应器（Y 1-Y N）依次施加第一驱动信号，确定具有触摸点的行感应器（Y n，Y n+j）；向M个列感应器（X 1-X M）依次施加第二驱动信号，确定具有触摸点的列感应器（X m，X m+i）；再向候选的具有触摸点的行感应器（Y n，Y n+j）或列感应器（X m，X m+i）提供第三驱动信号，检测该驱动信号在行感应器（Y n，Y n+j）或列感应器（X m，X m+i）中传输的信号延迟时间，根据延迟时间判定实际触摸点的坐标（A1（X m，Y n）和A4(X m+i，Y n+j），A2(X m+i，Y n）和A3（X m，Y n+j））。一种自电容触摸感测装置，该装置中采用如上方法对触摸点进行定位。一种包含如上电容触摸感测装置的显示设备。

Description

自电容触摸感测装置及触摸点定位方法、显示设备 技术领域
本发明涉及自电容触摸屏技术领域，尤其涉及一种自电容触摸感测装置及触摸点定位方法、显示设备。
背景技术
随着智能手机和平板电脑的飞速发展，人们可以直接利用触摸屏代替传统的键盘结构，得益于此，电容屏得到了前所未有的广泛应用。电容屏具有超强的灵敏度，并具有多点触摸功能，尤其是在游戏、拍照摄像等方面的应用使得各种相关硬件设备操作更加人性化。
投射电容屏可分为自电容屏和互电容屏两种类型。其中的自电容屏在玻璃表面用ITO(氧化铟锡，一种透明的导电薄膜材料)制作成横向与纵向电极阵列，这些横向和纵向的电极分别与地构成电容，即通常所说的自电容，也就是电极对地的电容。当手指触摸到电容屏时，手指的电容将会叠加到屏体电容上，使屏体电容量增加。自电容触摸屏存在着一个缺陷，就是所谓的“鬼点问题”，以下将对这一问题进行详细描述。
图1为现有的一种自电容触摸感测装置的示例性图示。图1所示的结构有8行、8列共128个触摸感应点(sensor pad)，主要包括，玻璃基板1、行感应器Y1-Y8、列感应器X1-X8。如图1中所示的，当两个触摸点为A点和D点时，行感应器Y2和Y7以及列感应器X2和X7分别感应到该两点触摸点，由于行感应器Y1-Y8和列感应器X1-X8分别是整行或整列感应，行感应器Y2和Y7以及列感应器X2和X7的交叉点除了A和D，还有B和C，四个交叉点的坐标可以表示为A(X2，Y2)、B(X7，Y2)、C(X2，Y7)、D(X7，Y7)。因此，除了实际触摸点A和D之外，该装置会误判B点和C点也发生了触摸，实际未触摸而被误判为触摸点的B点和C点称为“鬼点”。反之，若B点和C点为实际触摸点，则也有相应的“鬼点”A点和D点。
因此，有必要提供一种简便的方法来解决如上所述的问题。
发明内容
鉴于现有技术存在的不足，本发明提供了一种触摸点定位方法，主要用于自电容触摸感测装置的两点触摸点的定位，该定位方法能够准确的判断真实的触摸点，有效地排除了鬼点。
为了实现上述的目的，本发明采用了如下的技术方案：
一种触摸点定位方法，用于自电容触摸感测装置的两点触摸点的定位，所述触摸感测装置包括相互交叉的N个行感应器和M个列感应器，其中，该方法包括：
向N个行感应器依次施加第一驱动信号，确定具有触摸点的行感应器Yn和Yn+j；
向M个列感应器依次施加第二驱动信号，确定具有触摸点的列感应器Xm和Xm+i；
从行感应器Yn和Yn+j的一端施加第三驱动信号，在行感应器Yn和Yn+j的另一端检测所述第三驱动信号；比较所述第三驱动信号在行感应器Yn和Yn+j中的延迟时间，确定触摸点在行感应器Yn和Yn+j上对应的列感应器为Xm或Xm+i，最终确定真实的两点触摸点；或者是：从列感应器Xm和Xm+i的一端施加第三驱动信号，在列感应器Xm和Xm+i的另一端检测所述第三驱动信号；比较所述第三驱动信号在列感应器Xm和Xm+i中的延迟时间，确定触摸点在列感应器Xm和Xm+i上对应的行感应器为Yn或Yn+j，最终确定真实的两点触摸点；
其中，M、N为大于1的整数，m、m+i∈[1,M]，n、n+i∈[1,N]。
本发明的另一方面是提供一种自电容触摸感测装置，该装置包括相互交叉的N个行感应器和M个列感应器，其特征在于，该装置还包括行控制模块、列控制模块和判定模块，其中：
所述行控制模块向N个行感应器依次施加第一驱动信号，确定具有触摸点的行感应器Yn和Yn+j；
所述列控制模块向M个列感应器依次施加第二驱动信号，确定具有触摸点的列感应器Xm和Xm+i；
所述行控制模块还从行感应器Yn和Yn+j的一端施加第三驱动信号，在行感 应器Yn和Yn+j的另一端检测所述第三驱动信号；所述判定模块比较所述第三驱动信号在行感应器Yn和Yn+j中的延迟时间，确定触摸点在行感应器Yn和Yn+j上对应的列感应器为Xm或Xm+i，最终确定真实的两点触摸点；或者是：所述列控制模块还从列感应器Xm和Xm+i的一端施加第三驱动信号，在列感应器Xm和Xm+i的另一端检测所述第三驱动信号；所述判定模块比较所述第三驱动信号在列感应器Xm和Xm+i中的延迟时间，确定触摸点在列感应器Xm和Xm+i上对应的行感应器为Yn或Yn+j，最终确定真实的两点触摸点；
其中，M、N为大于1的整数，m、m+i∈[1,M]，n、n+i∈[1,N]。
本发明还提供了包括如上所述的自电容触摸感测装置的显示设备。
本发明实施例通过依次驱动行感应器和列感应器，获取候选的具有触摸点行感应器和列感应器(此时感应出两个真实触摸点和两个鬼点)，然后再向候选的具有触摸点行感应器或列感应器提供另一驱动信号，检测该驱动信号在行感应器或列感应器中传输的信号延迟时间(RC delay)。对于同一感应器，触摸点位置不同时，以触摸点为分割点将该感应器划分为两个阻值不同的电阻(电阻阻值总和为定值)，驱动信号的延迟时间不同，触摸点越接近驱动信号的输入端，则驱动信号的延迟时间越小。由此可判断两个候选的行感应器或列感应器上，对应触摸点的列感应器或行感应器的相对位置，最终可以准确的判定实际触摸点的坐标，有效地排除了鬼点。
附图说明
图1为现有的一种自电容触摸感测装置的示例性图示。
图2为本发明实施例1提供的自电容触摸感测装置的结构框图。
图3为本发明实施例1中向行感应器施加第三驱动信号的等效电路图。
图4为本发明实施例2提供的自电容触摸感测装置的结构框图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
实施例1
图2为本实施例提供的自电容触摸感测装置的结构框图。如图2所示，所述触摸感测装置包括玻璃基板10、相互交叉的N个行感应器Y1-YN和M个列感应器X1-XM。当以两点触摸该装置时，行感应器Yn和Yn+j以及列感应器Xm和Xm+i分别感应到所述两点触摸点。其中，M、N为大于1的整数，m、m+i∈[1,M]，n、n+i∈[1,N]。
该装置还包括行控制模块20、列控制模块30和判定模块40，其中：所述行控制模块20向N个行感应器依次施加第一驱动信号，确定具有触摸点的行感应器Yn和Yn+j。所述列控制模块30向M个列感应器依次施加第二驱动信号，确定具有触摸点的列感应器Xm和Xm+i。判定模块40分别连接到行控制模块20和列控制模块30，分别或者行控制模块20和列控制模块30的扫描信息。然而，行感应器Yn和Yn+j以及列感应器Xm和Xm+i的交叉点有四个A1-A4，可以用坐标A1(Xm，Yn)、A2(Xm+i，Yn)、A3(Xm，Yn+j)和A4(Xm+i，Yn+j)来表示，包括两个真实触摸点和两个鬼点。
为了准确定位两个真实触摸点，在本实施例中，所述行控制模块20还从行感应器Yn和Yn+j的一端施加第三驱动信号，在行感应器Yn和Yn+j的另一端检测所述第三驱动信号；所述判定模块40比较所述第三驱动信号在行感应器Yn和Yn+j中的延迟时间(RC delay)，确定触摸点在行感应器Yn和Yn+j上对应的列感应器为Xm或Xm+i，最终确定真实的两点触摸点。如图2所示的，检测第三驱动信号的连线可通过开关元件21连接到行控制模块20，当行控制模块20向行感应器施加第一驱动信号时，开关元件21断开，进行自电容检测；当行控制模块20向行感应器施加第三驱动信号时，开关元件21闭合，检测第三驱动信号的延迟时间。
如图3所示的等效电路图，对于同一行感应器Y，触摸点位置不同时，以触摸点为分割点将该行感应器Y划分为两个阻值不同的电阻R1和R2(电阻阻值R1+R2总和为定值)，在行感应器Y的一端施加第三驱动信号input时，在行感应器Y的另一端检测到的信号output的具有一延迟时间t，
t＝R1*Cf+(R1+R2)*Cs；
其中，(R1+R2)为行感应器Y的电阻总和，为定值；Cf为手指触摸电容，为定值；Cs为行感应器Y的自身电容，为定值。因此，在上式中，延迟时间t的大小随电阻R1的大小变化。当触摸点越接近驱动信号的输入端，电阻R1越小，则驱动信号的延迟时间t越小。
具体地，参阅图2中的，所述行控制模块20从行感应器Yn和Yn+j靠近列感应器为X1的一端施加第三驱动信号，在行感应器Yn和Yn+j靠近列感应器为XM的一端检测所述第三驱动信号。所述判定模块40比较所述第三驱动信号在行感应器Yn和Yn+j中的延迟时间，若所述第三驱动信号在行感应器Yn中的延迟时间小于在行感应器Yn+j中的延迟时间，则说明在行感应器Yn上的触摸点与在行感应器Yn+j上的触摸点相比较更接近第三驱动信号的输入端。再结合列控制模块30确定的具有触摸点的列感应器Xm和Xm+i，可以确定触摸点在行感应器Yn上对应的列感应器为Xm，触摸点在行感应器Yn+j上对应的列感应器为Xm+i，真实的两点触摸点的坐标为A1(Xm，Yn)和A4(Xm+i，Yn+j)。
反之，若所述第三驱动信号在行感应器Yn中的延迟时间大于在行感应器Yn+j中的延迟时间，则说明在行感应器Yn上的触摸点与在行感应器Yn+j上的触摸点相比较更远离第三驱动信号的输入端。再结合列控制模块30确定的具有触摸点的列感应器Xm和Xm+i，可以确定触摸点在行感应器Yn上对应的列感应器为Xm+i，触摸点在行感应器Yn+j上对应的列感应器为Xm，真实的两点触摸点的坐标为A2(Xm+i，Yn)和A3(Xm，Yn+j)。
本实施例中，当对触摸感测装置的行感应器施加驱动信号时，检测所述行感应器的感应值，若检测到的感应值大于预设值，则判定对应的行感应器检测到触摸点；当对触摸感测装置的列感应器施加驱动信号时，检测所述列感应器的感应值，若检测到的感应值大于预设值，则判定对应的列感应器检测到触摸点。具体地，所述感应值为感应器的电容值。
进一步地，如上提供的自电容触摸感测装置主要应用于的具有触摸功能的显示设备中。
实施例2
本实施例中，如图4所示，与实施例1不同的是，第三驱动信号由列控制模块30从列感应器Xm和Xm+i的一端施加，在列感应器Xm和Xm+i的另一端检测所述第三驱动信号；所述判定模块40比较所述第三驱动信号在列感应器Xm和Xm+i中的延迟时间，确定触摸点在列感应器Xm和Xm+i上对应的行感应器为Yn或Yn+j，最终确定真实的两点触摸点。如图4所示的，检测第三驱动信号的连线可通过开关元件31连接到列控制模块30，当列控制模块30向列感应器施加第二驱动信号时，开关元件31断开，进行自电容检测；当列控制模块30向列感应器施加第三驱动信号时，开关元件31闭合，检测第三驱动信号的延迟时 间。
对于第三驱动信号在列感应器中的延迟时间的对比过程及原理可参照实施例1中的实施方式。
具体地，，参阅图4中的，所述列控制模块30从列感应器Xm和Xm+i靠近行感应器为Y1的一端施加第三驱动信号，在列感应器Xm和Xm+i靠近行感应器为YN的一端检测所述第三驱动信号。所述判定模块40比较所述第三驱动信号在列感应器Xm和Xm+i中的延迟时间，若所述第三驱动信号在列感应器Xm中的延迟时间小于在列感应器Xm+i中的延迟时间，则说明在列感应器Xm上的触摸点与在列感应器Xm+i上的触摸点相比较更接近第三驱动信号的输入端。再结合行控制模块20确定的具有触摸点的行感应器Yn和Yn+j，可以确定触摸点在列感应器Xm上对应的行感应器为Yn，触摸点在列感应器为Xm+i上对应的行感应器Yn+j，真实的两点触摸点的坐标为A1(Xm，Yn)和A4(Xm+i，Yn+j)。
反之，若所述第三驱动信号在列感应器Xm中的延迟时间大于在列感应器Xm+i中的延迟时间，则说明在列感应器Xm上的触摸点与在列感应器Xm+i上的触摸点相比较更远离第三驱动信号的输入端。再结合行控制模块20确定的具有触摸点的行感应器Yn和Yn+j，可以确定触摸点在列感应器Xm上对应的行感应器Yn+j，触摸点在列感应器为Xm+i上对应的行感应器Yn，真实的两点触摸点的坐标为A2(Xm+i，Yn)和A3(Xm，Yn+j)。
本实施例中，当对触摸感测装置的行感应器施加驱动信号时，检测所述行感应器的感应值，若检测到的感应值大于预设值，则判定对应的行感应器检测到触摸点；当对触摸感测装置的列感应器施加驱动信号时，检测所述列感应器的感应值，若检测到的感应值大于预设值，则判定对应的列感应器检测到触摸点。具体地，所述感应值为感应器的电容值。
进一步地，如上提供的自电容触摸感测装置主要应用于的具有触摸功能的显示设备中。
综上所述，本发明实施例通过依次驱动行感应器和列感应器，获取候选的具有触摸点行感应器和列感应器(此时感应出两个真实触摸点和两个鬼点)，然后再向候选的具有触摸点行感应器或列感应器提供另一驱动信号，检测该驱动信号在行感应器或列感应器中传输的信号延迟时间(RC delay)。对于同一感应器，触摸点位置不同时，以触摸点为分割点将该感应器划分为两个阻值不同的 电阻(电阻阻值总和为定值)，驱动信号的延迟时间不同，触摸点越接近驱动信号的输入端，则驱动信号的延迟时间越小。由此可判断两个候选的行感应器或列感应器上，对应触摸点的列感应器或行感应器的相对位置，最终可以准确的判定实际触摸点的坐标，有效地排除了鬼点。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
显然，本发明的保护范围并不局限于上诉的具体实施方式，本领域的技术人员可以对发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (15)

  1. 一种触摸点定位方法，用于自电容触摸感测装置的两点触摸点的定位，所述触摸感测装置包括相互交叉的N个行感应器和M个列感应器，其中，该方法包括：
    向N个行感应器依次施加第一驱动信号，确定具有触摸点的行感应器Yn和Yn+j；
    向M个列感应器依次施加第二驱动信号，确定具有触摸点的列感应器Xm和Xm+i；
    从行感应器Yn和Yn+j的一端施加第三驱动信号，在行感应器Yn和Yn+j的另一端检测所述第三驱动信号；比较所述第三驱动信号在行感应器Yn和Yn+j中的延迟时间，确定触摸点在行感应器Yn和Yn+j上对应的列感应器为Xm或Xm+i，最终确定真实的两点触摸点；或者是：从列感应器Xm和Xm+i的一端施加第三驱动信号，在列感应器Xm和Xm+i的另一端检测所述第三驱动信号；比较所述第三驱动信号在列感应器Xm和Xm+i中的延迟时间，确定触摸点在列感应器Xm和Xm+i上对应的行感应器为Yn或Yn+j，最终确定真实的两点触摸点；
    其中，M、N为大于1的整数，m、m+i∈[1,M]，n、n+i∈[1,N]。
  2. 根据权利要求1所述的定位方法，其中，从行感应器Yn和Yn+j靠近列感应器为X1的一端施加第三驱动信号，在行感应器Yn和Yn+j靠近列感应器为XM的一端检测所述第三驱动信号；若所述第三驱动信号在行感应器Yn中的延迟时间小于在行感应器Yn+j中的延迟时间，则，触摸点在行感应器Yn上对应的列感应器为Xm，触摸点在行感应器Yn+j上对应的列感应器为Xm+i，真实的两点触摸点的坐标为(Xm，Yn)和(Xm+i，Yn+j)；反之，若所述第三驱动信号在行感应器Yn中的延迟时间大于在行感应器Yn+j中的延迟时间，则，触摸点在行感应器Yn上对应的列感应器为Xm+i，触摸点在行感应器Yn+j上对应的列感应器为Xm，真实的两点触摸点的坐标为(Xm+i，Yn)和(Xm，Yn+j)。
  3. 根据权利要求1所述的定位方法，其中，从列感应器Xm和Xm+i靠近行感应器为Y1的一端施加第三驱动信号，在列感应器Xm和Xm+i靠近行感应器为YN的一端检测所述第三驱动信号；若所述第三驱动信号在列感应器Xm中的延迟时间小于在列感应器Xm+i中的延迟时间，则，触摸点在列感应器Xm上对应的 行感应器为Yn，触摸点在列感应器为Xm+i上对应的行感应器Yn+j，真实的两点触摸点的坐标为(Xm，Yn)和(Xm+i，Yn+j)；反之，若所述第三驱动信号在列感应器Xm中的延迟时间大于在列感应器Xm+i中的延迟时间，则，触摸点在列感应器Xm上对应的行感应器Yn+j，触摸点在列感应器为Xm+i上对应的行感应器Yn，真实的两点触摸点的坐标为(Xm+i，Yn)和(Xm，Yn+j)。
  4. 根据权利要求1所述的定位方法，其中，当对触摸感测装置的行感应器或列感应器施加驱动信号时，检测所述行感应器或列感应器的感应值，若检测到的感应值大于预设值，则判定对应的行感应器或列感应器检测到触摸点。
  5. 根据权利要求4所述的定位方法，其中，所述感应值为感应器的电容值。
  6. 一种自电容触摸感测装置，所述触摸感测装置包括相互交叉的N个行感应器和M个列感应器，其中，该装置还包括行控制模块、列控制模块和判定模块，其中：
    所述行控制模块向N个行感应器依次施加第一驱动信号，确定具有触摸点的行感应器Yn和Yn+j；
    所述列控制模块向M个列感应器依次施加第二驱动信号，确定具有触摸点的列感应器Xm和Xm+i；
    所述行控制模块还从行感应器Yn和Yn+j的一端施加第三驱动信号，在行感应器Yn和Yn+j的另一端检测所述第三驱动信号；所述判定模块比较所述第三驱动信号在行感应器Yn和Yn+j中的延迟时间，确定触摸点在行感应器Yn和Yn+j上对应的列感应器为Xm或Xm+i，最终确定真实的两点触摸点；或者是：所述列控制模块还从列感应器Xm和Xm+i的一端施加第三驱动信号，在列感应器Xm和Xm+i的另一端检测所述第三驱动信号；所述判定模块比较所述第三驱动信号在列感应器Xm和Xm+i中的延迟时间，确定触摸点在列感应器Xm和Xm+i上对应的行感应器为Yn或Yn+j，最终确定真实的两点触摸点；
    其中，M、N为大于1的整数，m、m+i∈[1,M]，n、n+i∈[1,N]。
  7. 根据权利要求6所述的自电容触摸感测装置，其中，所述行控制模块从行感应器Yn和Yn+j靠近列感应器为X1的一端施加第三驱动信号，在行感应器Yn和Yn+j靠近列感应器为XM的一端检测所述第三驱动信号；所述判定模块比较所述第三驱动信号在行感应器Yn和Yn+j中的延迟时间，若所述第三驱动信号在行感应器Yn中的延迟时间小于在行感应器Yn+j中的延迟时间，则，触摸点在行 感应器Yn上对应的列感应器为Xm，触摸点在行感应器Yn+j上对应的列感应器为Xm+i，真实的两点触摸点的坐标为(Xm，Yn)和(Xm+i，Yn+j)；反之，若所述第三驱动信号在行感应器Yn中的延迟时间大于在行感应器Yn+j中的延迟时间，则，触摸点在行感应器Yn上对应的列感应器为Xm+i，触摸点在行感应器Yn+j上对应的列感应器为Xm，真实的两点触摸点的坐标为(Xm+i，Yn)和(Xm，Yn+j)。
  8. 根据权利要求6所述的自电容触摸感测装置，其中，所述列控制模块从列感应器Xm和Xm+i靠近行感应器为Y1的一端施加第三驱动信号，在列感应器Xm和Xm+i靠近行感应器为YN的一端检测所述第三驱动信号；所述判定模块比较所述第三驱动信号在列感应器Xm和Xm+i中的延迟时间，若所述第三驱动信号在列感应器Xm中的延迟时间小于在列感应器Xm+i中的延迟时间，则，触摸点在列感应器Xm上对应的行感应器为Yn，触摸点在列感应器为Xm+i上对应的行感应器Yn+j，真实的两点触摸点的坐标为(Xm，Yn)和(Xm+i，Yn+j)；反之，若所述第三驱动信号在列感应器Xm中的延迟时间大于在列感应器Xm+i中的延迟时间，则，触摸点在列感应器Xm上对应的行感应器Yn+j，触摸点在列感应器为Xm+i上对应的行感应器Yn，真实的两点触摸点的坐标为(Xm+i，Yn)和(Xm，Yn+j)。
  9. 根据权利要求6所述的自电容触摸感测装置，其中，当对触摸感测装置的行感应器施加驱动信号时，检测所述行感应器的感应值，若检测到的感应值大于预设值，则判定对应的行感应器检测到触摸点；当对触摸感测装置的列感应器施加驱动信号时，检测所述列感应器的感应值，若检测到的感应值大于预设值，则判定对应的列感应器检测到触摸点。
  10. 根据权利要求9所述的自电容触摸感测装置，其中，所述感应值为感应器的电容值。
  11. 一种显示设备，包括自电容触摸感测装置，该触摸感测装置包括相互交叉的N个行感应器和M个列感应器，其中，该装置还包括行控制模块、列控制模块和判定模块，其中：
    所述行控制模块向N个行感应器依次施加第一驱动信号，确定具有触摸点的行感应器Yn和Yn+j；
    所述列控制模块向M个列感应器依次施加第二驱动信号，确定具有触摸点 的列感应器Xm和Xm+i；
    所述行控制模块还从行感应器Yn和Yn+j的一端施加第三驱动信号，在行感应器Yn和Yn+j的另一端检测所述第三驱动信号；所述判定模块比较所述第三驱动信号在行感应器Yn和Yn+j中的延迟时间，确定触摸点在行感应器Yn和Yn+j上对应的列感应器为Xm或Xm+i，最终确定真实的两点触摸点；或者是：所述列控制模块还从列感应器Xm和Xm+i的一端施加第三驱动信号，在列感应器Xm和Xm+i的另一端检测所述第三驱动信号；所述判定模块比较所述第三驱动信号在列感应器Xm和Xm+i中的延迟时间，确定触摸点在列感应器Xm和Xm+i上对应的行感应器为Yn或Yn+j，最终确定真实的两点触摸点；
    其中，M、N为大于1的整数，m、m+i∈[1,M]，n、n+i∈[1,N]。
  12. 根据权利要求11所述的显示设备，其中，所述行控制模块从行感应器Yn和Yn+j靠近列感应器为X1的一端施加第三驱动信号，在行感应器Yn和Yn+j靠近列感应器为XM的一端检测所述第三驱动信号；所述判定模块比较所述第三驱动信号在行感应器Yn和Yn+j中的延迟时间，若所述第三驱动信号在行感应器Yn中的延迟时间小于在行感应器Yn+j中的延迟时间，则，触摸点在行感应器Yn上对应的列感应器为Xm，触摸点在行感应器Yn+j上对应的列感应器为Xm+i，真实的两点触摸点的坐标为(Xm，Yn)和(Xm+i，Yn+j)；反之，若所述第三驱动信号在行感应器Yn中的延迟时间大于在行感应器Yn+j中的延迟时间，则，触摸点在行感应器Yn上对应的列感应器为Xm+i，触摸点在行感应器Yn+j上对应的列感应器为Xm，真实的两点触摸点的坐标为(Xm+i，Yn)和(Xm，Yn+j)。
  13. 根据权利要求11所述的显示设备，其中，所述列控制模块从列感应器Xm和Xm+i靠近行感应器为Y1的一端施加第三驱动信号，在列感应器Xm和Xm+i靠近行感应器为YN的一端检测所述第三驱动信号；所述判定模块比较所述第三驱动信号在列感应器Xm和Xm+i中的延迟时间，若所述第三驱动信号在列感应器Xm中的延迟时间小于在列感应器Xm+i中的延迟时间，则，触摸点在列感应器Xm上对应的行感应器为Yn，触摸点在列感应器为Xm+i上对应的行感应器Yn+j，真实的两点触摸点的坐标为(Xm，Yn)和(Xm+i，Yn+j)；反之，若所述第三驱动信号在列感应器Xm中的延迟时间大于在列感应器Xm+i中的延迟时间，则，触摸点在列感应器Xm上对应的行感应器Yn+j，触摸点在列感应器为Xm+i上对应的行感应器Yn，真实的两点触摸点的坐标为(Xm+i，Yn)和(Xm，Yn+j)。
  14. 根据权利要求11所述的显示设备，其中，当对触摸感测装置的行感应 器施加驱动信号时，检测所述行感应器的感应值，若检测到的感应值大于预设值，则判定对应的行感应器检测到触摸点；当对触摸感测装置的列感应器施加驱动信号时，检测所述列感应器的感应值，若检测到的感应值大于预设值，则判定对应的列感应器检测到触摸点。
  15. 根据权利要求14所述的显示设备，其中，所述感应值为感应器的电容值。
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