WO2020124432A1 - 触摸屏的触摸检测方法、触摸屏组件和显示面板组件 - Google Patents

触摸屏的触摸检测方法、触摸屏组件和显示面板组件 Download PDF

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Publication number
WO2020124432A1
WO2020124432A1 PCT/CN2018/122076 CN2018122076W WO2020124432A1 WO 2020124432 A1 WO2020124432 A1 WO 2020124432A1 CN 2018122076 W CN2018122076 W CN 2018122076W WO 2020124432 A1 WO2020124432 A1 WO 2020124432A1
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Prior art keywords
differential
threshold
reference value
signals
absolute difference
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PCT/CN2018/122076
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English (en)
French (fr)
Inventor
江泽宁
吴东光
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Shenzhen Royole Technologies Co Ltd
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Shenzhen Royole Technologies Co Ltd
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Priority to PCT/CN2018/122076 priority Critical patent/WO2020124432A1/zh
Priority to CN201880097643.9A priority patent/CN113168253A/zh
Publication of WO2020124432A1 publication Critical patent/WO2020124432A1/zh
Priority to US17/350,390 priority patent/US20210311605A1/en
Anticipated expiration legal-status Critical
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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
    • G06F3/044—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
    • 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
    • G06F3/0416—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
    • G06F3/04182—Filtering of noise external to the device and not generated by digitiser components
    • 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

Definitions

  • the present application relates to the field of touch technology, and in particular, to a touch detection method for a touch screen, a touch screen component, and a display panel component.
  • the related art touch screen includes a plurality of touch sensors arranged in an array, a plurality of column drive lines (RX) and a plurality of column receive lines (TX), each row drive line is connected to a corresponding row of touch sensors, and each column receive line is Corresponds to a row of touch sensor connections. When working, it sends drive signals to the row drive lines, and detects the signal output of the column receive lines. The touch position is judged by the signal change of the column receiving line.
  • RX column drive lines
  • TX column receive lines
  • the current touch screen cannot recognize the situation in which the touch sensors connected to the entire row of drive lines are all touched and not touched, so that there is a detection dead zone in touch detection.
  • embodiments of the present application provide a touch detection method for a touch screen, a touch screen component, and a display panel component.
  • An embodiment of the present application provides a touch detection method for a touch screen.
  • the touch screen is used in a touch screen assembly.
  • the touch screen includes a plurality of touch sensors arranged in an array, a plurality of row drive lines, and a plurality of column reception lines.
  • a row driving line is connected to a row of the touch sensors, and each column receiving line is connected to a column of the touch sensors.
  • the touch detection method includes:
  • the reference value refers to an average value of the multiple differential amplification signals when the touch screen is not touched.
  • An embodiment of the present application provides a touch screen assembly, which includes a touch screen and a touch detection circuit.
  • the touch screen includes a plurality of touch sensors arranged in an array, a plurality of row drive lines, and a plurality of column reception lines. Each row drive line and a row The touch sensor is connected, each column drive line is connected to a column of the touch sensors, and the touch detection circuit includes:
  • a driving circuit for providing a driving signal to the row driving line
  • a plurality of first differential amplifiers for respectively differentially amplifying the output of any two adjacent column receiving lines to obtain multiple differential amplified signals
  • a second differential amplifier used to amplify the output of any of the column receiving lines to obtain a single-ended amplified signal
  • a processing circuit connecting the first differential amplifier and the second differential amplifier is configured to: when the first absolute difference between each differential amplified signal and the reference value is less than a first threshold and the When the second absolute difference between the single-ended amplified signal and the reference value is not less than the second threshold, it is determined that all column reception lines corresponding to the same row drive line are touched, and when the first absolute difference is less than When the first threshold value and the second absolute difference value are less than the second threshold value, it is determined that none of the column receiving lines corresponding to the same row driving line has touched,
  • the reference value refers to an average value of the multiple differential amplification signals when the touch screen is not touched.
  • Embodiments of the present application provide a display panel assembly, which includes a display panel and the above-mentioned touch screen assembly, where the touch screen is provided on the display panel.
  • a single-ended amplified signal is added by receiving lines in any column, so that even if the first absolute difference between all the differential amplified signals and the reference value is less than the first threshold When it cannot be discriminated whether the entire row of driving lines is touched, the second absolute difference between the single-ended amplified signal and the reference value and the second threshold size can be used to discriminate, thereby eliminating the blind area of touch detection.
  • FIG. 1 is a schematic flowchart of a touch detection method of a touch screen according to an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of a touch screen assembly according to an embodiment of the present application.
  • FIG. 3 is another schematic structural diagram of a touch screen assembly according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of the principle of a touch detection method of a touch screen according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a display panel assembly according to an embodiment of the present application.
  • the touch detection method according to the embodiment of the present application may be applied to the touch screen assembly 200 according to the embodiment of the present application.
  • the touch screen assembly 200 includes the touch detection circuit 10 and the touch screen 30.
  • the touch screen 30 includes a plurality of touch sensors Cji, a plurality of row driving lines TX and a plurality of column receiving lines RX, each row driving line is connected to a row of touch sensors, and each column receiving line is connected to a column of touch sensors.
  • Multiple touch sensors Cji are arranged in an array to form a touch sensor array, i*j touch sensors are arranged in i columns and j rows, where i, j are positive integers, j represents the row number of the touch sensor Cji, and i represents the touch sensor The column number of Cji.
  • the touch sensor is a capacitive sensor.
  • each row driving line TX is connected to one electrode of a corresponding row of capacitive sensors
  • each column receiving line RX is connected to another electrode of a corresponding row of capacitive sensors.
  • step S1 a driving signal is provided to the row driving line TX.
  • the touch detection circuit of the embodiment of the present application includes a drive circuit 40 that provides a drive signal to the row drive line TX, and the drive signal provided by the drive circuit 40 includes a PWM signal (pulse width modulation signal).
  • step S2 the outputs of any two adjacent column receiving lines RX are differentially amplified to obtain multiple differential amplification signals.
  • the number of column reception lines is i
  • the multiple differential amplification signals include i-1 differential amplification signals, i>2.
  • the outputs of the differential amplification column reception lines RX1 and RX2 get the first differential amplification signal
  • the outputs of the differential amplification column reception lines RX2 and RX3 get the second differential amplification signal, etc. .
  • Step S3 amplify the output of any column receiving line RX to obtain a single-ended amplified signal.
  • the single-ended amplified signal includes a first single-ended amplified signal obtained by amplifying the output of the first column receiving line, and a second obtained by amplifying the output of the i-th column receiving line.
  • Single-ended amplified signal obtained by amplifying the output of the first column receiving line, and a second obtained by amplifying the output of the i-th column receiving line.
  • Single-ended amplified signal In other words, the number of single-ended amplified signals is two.
  • the output of any column receiving line RXi can also be amplified to obtain a single-ended amplified signal.
  • Step S4 when the first absolute difference between each differential amplified signal and the reference value is less than the first threshold and the second absolute difference between the single-ended amplified signal and the reference value is not less than the second threshold, it is determined that the drive lines in the same row correspond All the column receiving lines are touched;
  • Step S5 When the first absolute difference is less than the first threshold and the second absolute difference is less than the second threshold, it is determined that none of the column receiving lines corresponding to the same row of driving lines has touched.
  • the reference value refers to the average value of the multiple differential amplified signals when the touch screen 30 is not touched.
  • the touch detection method of the touch screen described above by adding a single-ended amplified signal to any column receiving line, even if the first absolute difference between all the differential amplified signals and the reference value is less than the first threshold, the entire line cannot be discriminated and When the driving line is touched, the second absolute difference between the single-ended amplified signal and the reference value and the size of the second threshold can be used to distinguish the blind area of the touch detection.
  • the second absolute difference between the single-ended amplified signal and the reference value is not less than the second threshold, and the corresponding When the column receiving line is not touched, the second absolute difference between the single-ended amplified signal and the reference value is less than the second threshold.
  • the absolute difference refers to the absolute value of the difference.
  • the first range defined by the positive and negative first thresholds can be regarded as the noise range output by the touch sensor corresponding to the output of the differential amplified signal when not being touched. Within this first range, the differential amplified signal The fluctuations in size can be regarded as the fact that the touch sensor is not touched.
  • the second range defined by the positive and negative second thresholds can be regarded as the noise range output by the touch sensor corresponding to the output single-ended amplified signal when not being touched. Within this second range, the single-ended amplified The fluctuation of the size of the signal can be regarded as the fact that the touch sensor is not touched.
  • Both the first threshold and the second threshold are greater than 0 and can be calibrated by testing. In some examples, the first threshold may be equal to the second threshold.
  • step S2 is performed before step S3. It can be understood that, in other embodiments, step S2 may be performed after step S3, or steps S2 and S3 may be performed simultaneously.
  • the touch detection circuit includes a plurality of first differential amplifiers, a second differential amplifier, and a processing circuit 50 connected to the first differential amplifier and the second differential amplifier.
  • the two input terminals of the first differential amplifier Two adjacent column receiving lines are respectively connected, and an input terminal of the second differential amplifier is connected to any column receiving line.
  • the first differential amplifier and the second differential amplifier constitute an amplifier.
  • the multiple first differential amplifiers are used to differentially amplify the output of any two adjacent column receiving lines to obtain multiple differential amplified signals.
  • the second differential amplifier is used to amplify the output of any column receive line to obtain a single-ended amplified signal.
  • the processing circuit 50 is used to judge the same line when the first absolute difference between each differential amplified signal and the reference value is less than the first threshold and the second absolute difference between the single-ended amplified signal and the reference value is not less than the second threshold.
  • the column receiving lines corresponding to the driving lines are touched, and when the first absolute difference is less than the first threshold and the second absolute difference is less than the second threshold, it is determined that none of the column receiving lines corresponding to the same row of driving lines has touched control.
  • the positive input terminal of the first differential amplifier is connected to the left column receiving line, and the negative input terminal is connected to the right column receiving line.
  • a first resistor is connected between the input terminal and the output terminal to form negative feedback.
  • the negative input terminal of the first differential amplifier may be connected to the left column receiving line, and the positive input terminal may be connected to the right column receiving line. That is to say, the two input terminals of the first differential amplifier are respectively connected to two adjacent column receiving lines.
  • the number of first differential amplifiers is i-1, numbered from left to right is 1, 2, 3, ..., i-1.
  • the first differential amplifier 1 is connected to the first column receiving line and the second column receiving line
  • the first differential amplifier 2 is connected to the second column receiving line and the third column receiving line
  • the first differential amplifier i-1 is connected to the i -1 column receiving line and ith column receiving line.
  • the multiple differential amplified signals include i-1 differential amplified signals, the first differential amplifier 1 outputs the first differential amplified signal, the first differential amplifier 2 outputs the second differential amplified signal, and the first differential amplifier i-1 outputs the i -1 differential amplified signal.
  • the number of second differential amplifiers is 2, and the numbers from left to right are 0 and i, respectively.
  • the positive input terminal of the second differential amplifier 0 is connected to the first column receiving line, and a second resistor is connected between the negative input terminal and the output terminal to form negative feedback.
  • the positive input terminal of the second differential amplifier i is connected to the i-th column receiving line, and a second resistor is connected between the negative input terminal and the output terminal to form negative feedback. Therefore, in the illustrated embodiment, the single-ended amplified signal includes a first single-ended amplified signal obtained by amplifying the output of the first column receiving line, and a second single-ended amplified signal obtained by amplifying the output of the i-th column receiving line End amplifies the signal.
  • RXi and RX (i-1) are the input signals of the amplifier
  • Vout is the output signal (voltage) of the amplifier
  • Vout (RX(i-1)-RXi)*R4/R3;
  • RX(i-1) is not necessarily equal to RXi
  • the original value when the touch screen is not touched is taken as the reference value.
  • the RXi input signal will decrease, RX(i-1) will not change, RX(i-1)-RXi will become larger, Vout is greater than the reference value, the difference between the differential amplified signal and the reference value Delta is positive.
  • the RX(i-1) input signal will decrease, RXi will not change, RX(i-1)-RXi will become smaller, Vout is less than the reference value, the differential amplified signal will The difference Delta of the reference value is negative.
  • the difference Delta between the differential amplified signal and the reference value is 0.
  • the difference value Delta of the post-processed value of each amplifier output and the reference value can be determined according to the difference.
  • the reference value is the reference value of the differential amplification output when the touch screen is not touched. According to the size of the Delta and the polarity of the adjacent Delta, it can be judged to which column the RX connected touch sensor occurs. Then determine the position of the touch point according to the corresponding relationship with the row drive line TX. The relationship between the receiving line RX and Delta of the column where the touch position is located is shown in Table 1. Among them, the channels R1 and Ri only determine a Delta value to determine whether there is a touch. Control, the other channels R2 ⁇ Ri-1 can determine the two opposite polarity Delta to determine whether there is touch.
  • the touch screen may be affected by noise. Even if the touch screen is not touched, the differential amplification signal will fluctuate. Then, the difference Delta between the differential amplification signal and the reference value is not zero. Therefore, the first threshold is set, and when the absolute difference between the differential amplified signal and the reference value is less than the first threshold, it can be considered that the difference Delta between the differential amplified signal and the reference value is 0.
  • the column receiving line can be regarded as a channel output by the touch sensor. Therefore, for the first differential amplifier, regardless of whether the touch occurs on the channel RXi or the channel RX(i-1), the first absolute difference between the first differential amplified signal and the reference value is not less than the first threshold. When touch occurs simultaneously on channel RXi and channel RX(i-1), or neither channel RXi and channel RX(i-1) touch, the first absolute difference between the first differential amplified signal and the reference value is less than The first threshold.
  • the second absolute difference between the first single-ended amplified signal and the reference value is not less than the second threshold; when the touch occurs on the channel RXi, the second single-ended amplification The second absolute difference between the signal and the reference value is not less than the second threshold.
  • the second absolute difference between the first single-ended amplified signal and the reference value is less than the second threshold; when touch does not occur on channel RXi, the second single-ended amplified signal and the reference value The second absolute difference is less than the second threshold.
  • first differential amplifier and the second differential amplifier are connected in different ways to the touch sensor array 30, specifically, both input terminals of the first differential amplifier are connected to the touch sensor array 30, and there is only one second differential amplifier The input end is connected to the touch sensor array, and the other input end is connected to the output end. Therefore, two thresholds are set: a first threshold and a second threshold to determine whether the touch occurs in the corresponding channel. This judgment result is more accurate.
  • the specific values of the first threshold and the second threshold can be calibrated through experiments. For example, simulating the output of the touch screen component without touch and when touch occurs also includes simulating the impact of some external interference on the touch screen component, and finally determines the specific size of the threshold.
  • the difference Delta between the differential amplified signal or the single-ended amplified signal and the reference value is set Is 0.
  • Delta0 represents the difference between the second differential amplifier 0 and the reference value (first single-ended amplified signal)
  • Delta1 represents the difference between the first differential amplifier 1 and the reference value
  • Delta2 represents the first differential amplifier 2 and The difference between the reference values
  • Delta(i-1) represents the difference between the first differential amplifier i-1 and the reference value
  • Deltai represents the difference between the second differential amplifier i and the reference value (second single-ended amplified signal).
  • Table 2 shows that all the column receiving lines corresponding to the same row of driving lines are touched.
  • Delta0 and Deltai are negative numbers, indicating that the first column receiving line and the i-th (that is, the last) receiving line corresponding to the same row of driving lines are touched.
  • the middle Delta1 to Delta(i-1) is 0, indicating that the first to i-1 column receiving lines corresponding to the same row of driving lines are touched.
  • the touch detection method further includes:
  • the processing circuit 50 includes a low-pass filter 51, an integrator 52, a sampling and converter 53, and a processor 54.
  • the low-pass filter 51 is used to remove the noise of the output signals of the plurality of first differential amplifiers to obtain a plurality of first denoising signals, and remove the noise of the output signals of the second differential amplifiers to obtain a second denoising signal.
  • the integrator 52 is used to integrate multiple first denoising signals and second denoising signals to obtain multiple first integrating signals and second integrating signals.
  • the sampling and converter 53 is used for sampling and analog-to-digital conversion of a plurality of first integrated signals and second integrated signals to obtain a plurality of first digital signals and second digital signals.
  • the first digital signals are used as differential amplified signals and second
  • the digital signal is used as a single-ended amplified signal.
  • the processor 54 is configured to process the first digital signal and the second digital signal to obtain the relationship between the first absolute difference and the first threshold and the relationship between the second absolute difference and the second threshold.
  • the processor 54 is an MCU (Micro Control Unit), and the processor 54 is also used to output the processing result.
  • the touch detection method further includes:
  • Step S6 when the second absolute difference between the first single-ended amplified signal and the reference value is not less than the second threshold, the first absolute difference between the first differential amplified signal and the reference value is greater than the first threshold, the second to the second When the first absolute difference between the i-1 differential amplified signals and the reference value is less than the first threshold, it is determined that the first column receiving line is touched;
  • Step S7 when the first absolute difference between the k-th differential amplified signal and the reference value is greater than the first threshold, the first absolute difference between the first to k-1th differential amplified signal and the reference value is less than the first threshold
  • 1 ⁇ k ⁇ i is a natural number
  • Step S8 when the first absolute difference between the k-1th and kth differential amplified signals and the reference value is greater than the first threshold, the difference between the k-1th differential amplified signal and the reference value is amplified with the kth differential When the polarity of the difference between the signal and the reference value is opposite, it is judged that the k-th column receiving line is touched;
  • Step S10 when the second absolute difference between the second single-ended amplified signal and the reference value is not less than the second threshold, the first absolute difference between the i-1th differential amplified signal and the reference value is greater than the first threshold, the first When the first absolute difference between the i-2th differential amplified signal and the reference value is less than the first threshold, it is determined that the i-th column receiving line is touched.
  • the positive input terminal of the first differential amplifier is connected to RX(i-1), and the negative input terminal is connected to RXi. Therefore, when it is judged that the k-th column receiving line is touched, the polarity of the difference between the k-1th differential amplified signal and the reference value is positive, and the polarity of the difference between the kth differential amplified signal and the reference value is negative .
  • the polarity of the difference between the mth differential amplified signal and the reference value is positive, and the polarity of the difference between the kth differential amplified signal and the reference value is positive Is negative.
  • the driving circuit 40 includes a row driving circuit, and the row driving circuit is used to provide a driving signal to the row driving lines row by row. In this way, the driving circuit 40 can drive each row of touch sensors in a time-sharing manner.
  • the drive circuit 40 includes a row drive circuit and a multiplexer.
  • the multiplexer connects the row drive circuit and the multiple row drive lines.
  • the row drive circuit is used to implement The row drive lines also provide drive signals. In this way, the driving circuit 40 can simultaneously drive each row of touch sensors.
  • a display panel assembly 200 includes a touch screen assembly 200 and a display panel 20.
  • the touch screen 30 is provided on the display panel 20.
  • a single-ended amplified signal is added to any column receiving line, so even if the first absolute difference between all the differential amplified signals and the reference value is less than the first threshold, it is impossible to distinguish whether the entire row drive line When touch occurs, the second absolute difference between the single-ended amplified signal and the reference value and the second threshold value can be used to distinguish, so as to eliminate the blind area of touch detection.
  • the display panel 20 may include a liquid crystal display panel, an organic light-emitting display panel, a plasma display panel, and a field emission display panel.
  • the touch screen 30 is stacked on the display panel 20. It can be understood that, in other embodiments, the touch screen may be formed in the display panel.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

一种触摸屏的触摸检测方法、触摸屏组件（200）及显示面板组件（100），触摸屏（30）包括阵列排布的多个触摸传感器（Cji）、多条行驱动线（TX）和多条列接收线（RX），每条行驱动线（TX）与一行触摸传感器（Cji）连接，每条列接收线（RX）与一列触摸传感器（Cji）连接，触摸检测方法包括：向行驱动线（TX）提供驱动信号（S1）；分别差分放大任意两条相邻的列接收线（RX）的输出以得到多个差分放大信号（S2）；放大任一列接收线（RX）的输出以得到单端放大信号（S3）；当每个差分放大信号与基准值的第一绝对差值均小于第一阈值且单端放大信号与基准值的第二绝对差值不小于第二阈值时，判断同一行驱动线（TX）对应的列接收线（RX）均发生触控（S4）；和当第一绝对差值均小于第一阈值且第二绝对差值小于第二阈值时，判断同一行驱动线（TX）对应的列接收线（RX）均未发生触控（S5）。

Description

触摸屏的触摸检测方法、触摸屏组件和显示面板组件 技术领域
本申请涉及触摸技术领域，特别涉及一种触摸屏的触摸检测方法、触摸屏组件和显示面板组件。
背景技术
相关技术的触摸屏包括阵列排布的多个触摸传感器、多条列驱动线(RX)和多条列接收线(TX)，每条行驱动线与对应一行触摸传感器连接，每条列接收线与对应一列触摸传感器连接。工作时，给行驱动线发送驱动信号，并检测列接收线的信号输出。通过列接收线的信号变化来判断触摸位置。
然而，目前的触摸屏无法识别与整条行驱动线连接的触摸传感器全被触碰和未被触碰的情况，使得触摸检测存在检测盲区。
发明内容
有鉴于此，本申请的实施例提供一种触摸屏的触摸检测方法、触摸屏组件和显示面板组件。
本申请实施方式提供一种触摸屏的触摸检测方法，所述触摸屏用于触摸屏组件，所述触摸屏包括阵列排布的多个触摸传感器、多条行驱动线和多条列接收线，每条所述行驱动线与一行所述触摸传感器连接，每条所述列接收线与一列所述触摸传感器连接，所述触摸检测方法包括：
向所述行驱动线提供驱动信号；
分别差分放大任意两条相邻的所述列接收线的输出以得到多个差分放大信号；
放大任一所述列接收线的输出以得到单端放大信号；
当每个所述差分放大信号与基准值的第一绝对差值均小于第一阈值且所述单端放大信号与所述基准值的第二绝对差值不小于第二阈值时，判断同一所述行驱动线对应的列接收线均发生触控；和
当所述第一绝对差值均小于所述第一阈值且所述第二绝对差值小于所述第二阈值时，判断同一所述行驱动线对应的列接收线均未发生触控，所述基准值指所述触摸屏未被触控时所述多个差分放大信号的平均值。
本申请实施方式提供一种触摸屏组件，其包括触摸屏和触摸检测电路，所述触摸屏包括 阵列排布的多个触摸传感器、多条行驱动线和多条列接收线，每条行驱动线与一行所述触摸传感器连接，每条所述列驱动线与一列所述触摸传感器连接，所述触摸检测电路包括：
驱动电路，用于向所述行驱动线提供驱动信号；
多个第一差分放大器，用于分别差分放大任意两条相邻的所述列接收线的输出以得到多个差分放大信号；和
第二差分放大器，用于放大任一条所述列接收线的输出以得到单端放大信号；和
连接所述第一差分放大器和所述第二差分放大器的处理电路，所述处理电路用于：当每个所述差分放大信号与基准值的第一绝对差值均小于第一阈值且所述单端放大信号与所述基准值的第二绝对差值不小于第二阈值时，判断同一所述行驱动线对应的列接收线均发生触控，和当所述第一绝对差值均小于所述第一阈值且所述第二绝对差值小于所述第二阈值时，判断同一所述行驱动线对应的列接收线均未发生触控，
所述基准值指所述触摸屏未被触控时所述多个差分放大信号的平均值。
本申请实施方式提供一种显示面板组件，其包括显示面板和上述触摸屏组件，所述触摸屏设置在所述显示面板上。
上述的触摸屏的触摸检测方法、触摸屏组件和显示面板组件中，通过在任一条列接收线增加单端放大信号，如此，即使在所有差分放大信号与基准值的第一绝对差值均小于第一阈值而无法甄别与整条行驱动线是否发生触控时，可以通过单端放大信号与基准值的第二绝对差值与第二阈值大小来甄别，从而消除触摸检测的盲区。
本申请的实施方式的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实施方式的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：
图1为本申请实施方式的触摸屏的触摸检测方法的流程示意图；
图2为本申请实施方式的触摸屏组件的结构示意图；
图3为本申请实施方式的触摸屏组件的另一结构示意图；
图4为本申请实施方式的触摸屏的触摸检测方法的原理示意图；
图5为本申请实施方式的显示面板组件的结构示意图。
具体实施方式
下面详细描述本申请的实施方式，实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
请参阅图1至图3，本申请实施方式的触摸检测方法可以应用于本申请实施方式的触摸屏组件200。触摸屏组件200包括触摸检测电路10和触摸屏30。
触摸屏30包括多个触摸传感器Cji、多条行驱动线TX和多条列接收线RX，每条行驱动线与一行触摸传感器连接，每条列接收线与一列触摸传感器连接。多个触摸传感器Cji呈阵列排布形成触摸传感器阵列，i*j个触摸传感器排列成i列j行，其中，i，j为正整数，j表示触摸传感器Cji的行序数，而i表示触摸传感器Cji的列序数。
在本申请实施方式中，触摸传感器是电容传感器，具体的，每条行驱动线TX与对应一行电容传感器的一个电极连接，每条列接收线RX与对应一列电容传感器的另一个电极连接。
本申请实施方式的触摸屏的触摸检测方法包括：
步骤S1，向行驱动线TX提供驱动信号。
具体的，本申请实施方式的触摸检测电路包括向行驱动线TX提供驱动信号的驱动电路40，其提供的驱动信号包括PWM信号(脉冲宽度调制信号)。
步骤S2，分别差分放大任意两条相邻的列接收线RX的输出以得到多个差分放大信号。
在图示的实施方式中，列接收线的条数为i，多个差分放大信号包括i-1个差分放大信号，i>2。
差分放大任意两条相邻的列接收线RX，例如差分放大列接收线RX1和RX2的输出得到第一个差分放大信号，差分放大列接收线RX2和RX3的输出得到第二个差分放大信号等。
步骤S3，放大任一条列接收线RX的输出以得到单端放大信号。
具体的，在图示的实施方式中，单端放大信号包括放大第1条列接收线的输出而得到的第一单端放大信号，和放大第i条列接收线的输出而得到的第二单端放大信号。也就是说，单端放大信号的数量是两个。在其它实施方式中，也可放大任一条列接收线RXi的输出以得到单端放大信号。
步骤S4，当每个差分放大信号与基准值的第一绝对差值均小于第一阈值且单端放大信号与基准值的第二绝对差值不小于第二阈值时，判断同一行驱动线对应的列接收线均发生触控；
步骤S5，当第一绝对差值均小于第一阈值且第二绝对差值小于第二阈值时，判断同一行驱动线对应的列接收线均未发生触控。
其中，基准值指触摸屏30未被触控时多个差分放大信号的平均值。
上述的触摸屏的触摸检测方法中，通过在任一条列接收线增加单端放大信号，如此，即 使在所有差分放大信号与基准值的第一绝对差值均小于第一阈值而无法甄别与整条行驱动线是否发生触控时，可以通过单端放大信号与基准值的第二绝对差值与第二阈值大小来甄别，从而消除触摸检测的盲区。
进一步地，在对应的列接收线发生触控(即与列接收线连接的触摸传感器被触控)，单端放大信号与基准值的第二绝对差值不小于第二阈值，而在对应的列接收线未发生触控时，单端放大信号与基准值的第二绝对差值小于第二阈值。所说的绝对差值是指差值的绝对值。
可以理解，正负第一阈值所限定的第一范围可以看成是输出差分放大信号所对应的触摸传感器在没被触控时所输出的噪声范围，在这个第一范围内，差分放大信号的大小波动都可被看成是实际上触摸传感器并未被触控。同样地，正负第二阈值所限定的第二范围可以看成是输出单端放大信号所对应的触摸传感器在未被触控时所输出的噪声范围，在这个第二范围内，单端放大信号的大小波动都可被看成是实际上触摸传感器并未被触控。第一阈值与第二阈值均大于0且可通过测试来标定。在某些例子中，第一阈值可等于第二阈值。
在图1的示例中，步骤S2在步骤S3之前执行，可以理解，在其它实施方式中，步骤S2可在步骤S3之后执行，或步骤S2和S3同时执行。
请结合图3，本申请实施方式的触摸检测电路包括多个第一差分放大器、第二差分放大器和连接第一差分放大器和第二差分放大器的处理电路50，第一差分放大器的两个输入端分别连接两条相邻的列接收线，第二差分放大器的一个输入端连接任一列接收线。在图2中，第一差分放大器和第二差分放大器构成放大器。
多个第一差分放大器用于分别差分放大任意两条相邻的列接收线的输出以得到多个差分放大信号。第二差分放大器用于放大任一条列接收线的输出以得到单端放大信号。
处理电路50用于：当每个差分放大信号与基准值的第一绝对差值均小于第一阈值且单端放大信号与基准值的第二绝对差值不小于第二阈值时，判断同一行驱动线对应的列接收线均发生触控，和当第一绝对差值均小于第一阈值且第二绝对差值小于第二阈值时，判断同一行驱动线对应的列接收线均未发生触控。
具体地，在图示的方位中，在两条相邻的列接收线中，第一差分放大器的正向输入端连接左边的列接收线，负向输入端连接右边的列接收线，负向输入端与输出端之间连接有第一电阻，构成负反馈。可以理解，在其它实施方式中，也可以是，第一差分放大器的负向输入端连接左边的列接收线，正向输入端连接右边的列接收线。也就是说，第一差分放大器的两个输入端分别与两条相邻的列接收线连接。
在图示的实施方式中，第一差分放大器的数量是i-1个，从左到右编号分别为1、2、3、…、i-1。第一差分放大器1连接第1条列接收线和第2条列接收线，第一差分放大器2连接第2条列接收线和第3条列接收线，第一差分放大器i-1连接第i-1条列接收线和第i条列接收线。 多个差分放大信号包括i-1个差分放大信号，第一差分放大器1输出第1个差分放大信号，第一差分放大器2输出第2个差分放大信号，第一差分放大器i-1输出第i-1个差分放大信号。
在图示的实施方式中，第二差分放大器的数量是2个，从左到右编号分别为0和i。第二差分放大器0的正向输入端连接第1条列接收线，负向输入端与输出端之间连接有第二电阻，构成负反馈。第二差分放大器i的正向输入端连接第i条列接收线，负向输入端与输出端之间连接有第二电阻，构成负反馈。因此，在图示的实施方式中，单端放大信号包括放大第1条列接收线的输出而得到的第一单端放大信号，和放大第i条列接收线的输出而得到的第二单端放大信号。
差分放大原理如图4所示，其中RXi和RX(i-1)为放大器的输入信号，Vout为放大器的输出信号(电压)，R1、R2、R3、R4为控制差分放大倍数的电阻，其中，较佳地，R1＝R3，R2＝R4。
差分放大公式为：Vout＝(RX(i-1)-RXi)*R4/R3；
当输入信号RX(i-1)大于RXi，Vout输出为正；当RX(i-1)小于RXi，Vout输出为负；当RX(i-1)等于RXi，Vout输出为0。
实际中因RX(i-1)不一定等于RXi，所以取触摸屏未被触控时的原始值为基准值。当触控发生在RXi通道时，RXi输入信号会减小，RX(i-1)不变，RX(i-1)-RXi变大，Vout大于基准值，差分放大信号与基准值的差值Delta为正极性。当触控发生在RX(i-1)通道时，RX(i-1)输入信号会减小，RXi不变，RX(i-1)-RXi变小，Vout小于基准值，差分放大信号与基准值的差值Delta为负极性。当RX(i-1)通道和RXi未发生触控时，差分放大信号与基准值的差值Delta为0。
由上可知，可以根据各个放大器输出后段处理后的值和基准值的差值Delta，基准值为触摸屏未被触控时差分放大输出的基准值。根据Delta的大小及相邻Delta的极性可以判断触控位置发生在与哪个列接收RX连接的触摸传感器上。再根据和行驱动线TX的对应关系判断出触控点的位置，其中触控位置所在列接收线RX和Delta的关系见表1，其中通道R1和Ri只判断一个Delta值来确定是否有触控，其他通道R2～Ri-1可判断两个极性相反Delta来判断是否有触控。
表1
Figure PCTCN2018122076-appb-000001
在实际应用中，如前，触摸屏可能受噪声影响，即使在触摸屏未被触控的情况下，差分放大信号也会产生波动，那么，差分放大信号与基准值的差值Delta不为0。因此，设置了第一阈值，在差分放大信号与基准值的绝对差值小于第一阈值时，可认为是差分放大信号与基准值的差值Delta为0。
在本申请实施方式中，列接收线可以看成是触摸传感器输出的通道。因此，对于第一差分放大器，不管触控发生在通道RXi或在通道RX(i-1)，第一差分放大信号与基准值的第一绝对差值不小于第一阈值。当触控同时发生在通道RXi和通道RX(i-1)，或通道RXi和通道RX(i-1)均未发生触控时，第一差分放大信号与基准值的第一绝对差值小于第一阈值。对于第二差分放大器，当触控发生在通道RX1时，第一单端放大信号与基准值的第二绝对差值不小于第二阈值；当触控发生在通道RXi时，第二单端放大信号与基准值的第二绝对差值不小于第二阈值。当触控未发生在通道RX1时，第一单端放大信号与基准值的第二绝对差值小于第二阈值；当触控未发生在通道RXi时，第二单端放大信号与基准值的第二绝对差值小于第二阈值。需要指出的是，因为第一差分放大器和第二差分放大器连接触摸传感器阵列30的方式不同，具体地，第一差分放大器的两个输入端都连接到触摸传感器阵列30，第二差分放大器只有一个端入端接入到触摸传感器阵列，另一输入端与输出端连接。因此，设置两个阈值：第一阈值和第二阈值，来判断触摸是否发生在相应通道。这样判断结果较为准确。第一阈值和第二阈值的具体数值，可通过试验来标定。例如，模拟触摸屏组件在未发生触控和发生触控的情况下的输出，也包括模拟一些外界干扰对触摸屏组件的影响，最终来决定阈值的具体大小。
以下用具体的例子来说明上述实施方式。为简化说明，在差分放大信号或单端放大信号与基准值的绝对差值(即差值Delta的绝对值)小于阈值时，将差分放大信号或单端放大信号与基准值的差值Delta设为0。
在下面的例子中，Delta0表示第二差分放大器0与基准值的差值(第一单端放大信号)，Delta1表示第一差分放大器1与基准值的差值，Delta2表示第一差分放大器2与基准值的差值，Delta(i-1)表示第一差分放大器i-1与基准值的差值，Deltai表示第二差分放大器i与基准值的差值(第二单端放大信号)。其它未说明的，以此类推。
请结合表2，表2说明的是与同一行驱动线对应的列接收线都发生触控。
表2
Figure PCTCN2018122076-appb-000002
分析：由上表可知，Delta0和Deltai为负数，表明与同一行驱动线对应的第1条列接收线和第i条(即最后一条)接收线都发生触控，在这种情况下，中间的Delta1至Delta(i-1)为0，表明与同一行驱动线对应的第1条至第i-1条列接收线都发生触控。
请结合表3，表3说明的是与同一行驱动线对应的列接收线都未发生触控。
表3
Figure PCTCN2018122076-appb-000003
分析：由上表可知，Delta0和Deltai均为0，表明与同一行驱动线对应的第1条列接收线和第i条列接收线未发生触控，在这种情况下，中间的Delta1至Delta(i-1)为0，表明与同一行驱动线对应的第1条至第i-1条列接收线均未发生触控。
在本申请实施方式中，触摸检测方法还包括：
移除多个第一差分放大器的输出信号的噪声以得到多个第一去噪信号，和移除第二差分放大器的输出信号的噪声以得到第二去噪信号；
对多个第一去噪信号和第二去噪信号进行积分以得到多个第一积分信号和第二积分信号；
对多个第一积分信号和第二积分信号进行采样和模数转换以得到多个第一数字信号和第二数字信号，第一数字信号作为差分放大信号和第二数字信号作为单端放大信号；
处理第一数字信号和第二数字信号以得到第一绝对差值与第一阈值的关系及第二绝对差值与第二阈值的关系。
如此，采用数字信号作为触摸结果的比较，通用性强。
具体地，处理电路50包括低通滤波器51，积分器52、采样和转换器53和处理器54。
低通滤波器51用于移除多个第一差分放大器的输出信号的噪声以得到多个第一去噪信号，和移除第二差分放大器的输出信号的噪声以得到第二去噪信号。积分器52用于对多个第一去噪信号和第二去噪信号进行积分以得到多个第一积分信号和第二积分信号。采样和转 换器53用于对多个第一积分信号和第二积分信号进行采样和模数转换以得到多个第一数字信号和第二数字信号，第一数字信号作为差分放大信号和第二数字信号作为单端放大信号。处理器54用于处理第一数字信号和第二数字信号以得到第一绝对差值与第一阈值的关系及第二绝对差值与第二阈值的关系。在一个例子中，处理器54为MCU(微控制单元)，处理器54还用于将处理的结果输出。
在某些实施方式中，触摸检测方法还包括：
步骤S6，当第一单端放大信号与基准值的第二绝对差值不小于第二阈值，第1个差分放大信号与基准值的第一绝对差值大于第一阈值，第2个到第i-1个差分放大信号与基准值的第一绝对差值均小于第一阈值时，判断第1条列接收线发生触控；
步骤S7，当第k个差分放大信号与基准值的第一绝对差值大于第一阈值，第1个至第k-1个差分放大信号与基准值的第一绝对差值均小于第一阈值时，判断第1条至第k条列接收线发生触控，1<k<i为自然数；
步骤S8，当第k-1个和第k个差分放大信号与基准值的第一绝对差值大于第一阈值，第k-1个差分放大信号与基准值的差值与第k个差分放大信号与基准值的差值极性相反时，判断第k条列接收线发生触控；
步骤S9，当第m个和第k个差分放大信号与基准值的第一绝对差值大于第一阈值，第m个差分放大信号与基准值的差值与第k个差分放大信号与基准值的差值极性相反，第m+1个到第k-1个差分放大信号与基准值的第一绝对差值均小于第一阈值时，判断第m+1条至第k条列接收线发生触控，k>m>＝1；
步骤S10，当第二单端放大信号与基准值的第二绝对差值不小于第二阈值，第i-1个差分放大信号与基准值的第一绝对差值大于第一阈值，第1个至第i-2个差分放大信号与基准值的第一绝对差值均小于第一阈值时，判断第i条列接收线发生触控。
如此，可以确定触摸屏被触控的位置。
具体地，第一差分放大器的正向输入端连接RX(i-1)，负向输入端连接RXi。因此，在判断第k条列接收线发生触控时，第k-1个差分放大信号与基准值的差值极性为正，第k个差分放大信号与基准值的差值极性为负。在判断第m+1条至第k条列接收线发生触控时，第m个差分放大信号与基准值的差值极性为正，第k个差分放大信号与基准值的差值极性为负。
在其它实施方式中，若第一差分放大器的负向输入端连接RX(i-1)，正向输入端连接RXi，则上述差值的极性相反。
在某些实施方式中，驱动电路40包括行驱动电路，行驱动电路用于逐行向行驱动线提供驱动信号。如此，驱动电路40可以分时驱动每行触摸传感器。
在某些实施方式中，驱动电路40包括行驱动电路和多路选择器，多路选择器连接行驱动电路和多条行驱动线，行驱动电路用于通过多路选择器实现对不同行的行驱动线同时提供驱动信号。如此，驱动电路40可以同时驱动每行触摸传感器。
请结合图5，本申请实施方式的一种显示面板组件200包括触摸屏组件200和显示面板20。触摸屏30设置在显示面板20。
上述显示面板组件中，通过在任一条列接收线增加单端放大信号，如此，即使在所有差分放大信号与基准值的第一绝对差值均小于第一阈值而无法甄别与整条行驱动线是否发生触控时，可以通过单端放大信号与基准值的第二绝对差值与第二阈值大小来甄别，从而消除触摸检测的盲区。
显示面板20可包括液晶显示面板、有机发光显示面板、等离子体显示面板及场发射显示面板。
在图示的实施方式中，触摸屏30层叠在显示面板20上。可以理解，在其它实施方式中，触摸屏可以形成在显示面板内。
尽管上面已经示出和描述了本申请的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本申请的限制，本领域的普通技术人员在本申请的范围内可以对上述实施例进行变化、修改、替换和变型，本申请的范围由权利要求及其等同物限定。

Claims (13)

  1. 一种触摸屏的触摸检测方法，所述触摸屏用于触摸屏组件，所述触摸屏包括阵列排布的多个触摸传感器、多条行驱动线和多条列接收线，每条所述行驱动线与一行所述触摸传感器连接，每条所述列接收线与一列所述触摸传感器连接，其特征在于，所述触摸检测方法包括：
    向所述行驱动线提供驱动信号；
    分别差分放大任意两条相邻的所述列接收线的输出以得到多个差分放大信号；
    放大任一所述列接收线的输出以得到单端放大信号；
    当每个所述差分放大信号与基准值的第一绝对差值均小于第一阈值且所述单端放大信号与所述基准值的第二绝对差值不小于第二阈值时，判断同一所述行驱动线对应的列接收线均发生触控；和
    当所述第一绝对差值均小于所述第一阈值且所述第二绝对差值小于所述第二阈值时，判断同一所述行驱动线对应的列接收线均未发生触控，所述基准值指所述触摸屏未被触控时所述多个差分放大信号的平均值。
  2. 如权利要求1所述的触摸屏的触摸检测方法，其特征在于，所述驱动信号包括PWM信号。
  3. 如权利要求1所述的触摸屏的触摸检测方法，其特征在于，所述触摸屏组件包括多个第一差分放大器和第二差分放大器，所述第一差分放大器的两个输入端分别连接两条相邻的所述列接收线，所述第二差分放大器的一个输入端连接任一所述列接收线，所述触摸检测方法还包括：
    移除所述多个第一差分放大器的输出信号的噪声以得到多个第一去噪信号，和移除所述第二差分放大器的输出信号的噪声以得到第二去噪信号；
    对所述多个第一去噪信号和所述第二去噪信号进行积分以得到多个第一积分信号和第二积分信号；
    对所述多个第一积分信号和所述第二积分信号进行采样和模数转换以得到多个第一数字信号和第二数字信号，所述第一数字信号作为所述差分放大信号和所述第二数字信号作为所述单端放大信号；
    处理所述第一数字信号和所述第二数字信号以得到所述第一绝对差值与所述第一阈值的关系及所述第二绝对差值与所述第二阈值的关系。
  4. 如权利要求1所述的触摸屏的触摸检测方法，其特征在于，所述列接收线的数量是i，所述单端放大信号包括放大所述第1条列接收线的输出而得到的第一单端放大信号，和放大所述第i条列接收线的输出而得到的第二单端放大信号，i>2且为自然数，所述多个差分放大信号包括i-1个差分放大信号，
    所述触摸检测方法还包括：
    当所述第一单端放大信号与所述基准值的所述第二绝对差值不小于所述第二阈值，第1个所述差分放大信号与所述基准值的所述第一绝对差值大于所述第一阈值，第2个到第i-1个所述差分放大信号与所述基准值的所述第一绝对差值均小于所述第一阈值时，判断第1条所述列接收线发生触控；
    当第k个所述差分放大信号与所述基准值的所述第一绝对差值大于所述第一阈值，第1个至第k-1个所述差分放大信号与所述基准值的所述第一绝对差值均小于所述第一阈值时，判断第1条至第k条所述列接收线发生触控，1<k<i为自然数；
    当第k-1个和第k个所述差分放大信号与所述基准值的所述第一绝对差值大于所述第一阈值，第k-1个所述差分放大信号与所述基准值的差值与第k个所述差分放大信号与所述基准值的差值极性相反时，判断第k条所述列接收线发生触控；
    当第m个和第k个所述差分放大信号与所述基准值的所述第一绝对差值大于所述第一阈值，第m个所述差分放大信号与所述基准值的差值与第k个所述差分放大信号与所述基准值的差值极性相反，第m+1个到第k-1个所述差分放大信号与所述基准值的所述第一绝对差值均小于所述第一阈值时，判断第m+1条至第k条所述列接收线发生触控，k>m>＝1；
    当所述第二单端放大信号与所述基准值的所述第二绝对差值不小于所述第二阈值，第i-1个所述差分放大信号与所述基准值的所述第一绝对差值大于所述第一阈值，第1个至第i-2个所述差分放大信号与所述基准值的所述第一绝对差值均小于所述第一阈值时，判断第i条所述列接收线发生触控。
  5. 一种触摸屏组件，其特征在于，包括触摸屏和触摸检测电路，所述触摸屏包括阵列排布的多个触摸传感器、多条行驱动线和多条列接收线，每条行驱动线与一行所述触摸传感器连接，每条所述列驱动线与一列所述触摸传感器连接，所述触摸检测电路包括：
    驱动电路，用于向所述行驱动线提供驱动信号；
    多个第一差分放大器，用于分别差分放大任意两条相邻的所述列接收线的输出以得到多个差分放大信号；和
    第二差分放大器，用于放大任一条所述列接收线的输出以得到单端放大信号；和
    连接所述第一差分放大器和所述第二差分放大器的处理电路，所述处理电路用于：当每个所述差分放大信号与基准值的第一绝对差值均小于第一阈值且所述单端放大信号与所述基准值的第二绝对差值不小于第二阈值时，判断同一所述行驱动线对应的列接收线均发生触控，和当所述第一绝对差值均小于所述第一阈值且所述第二绝对差值小于所述第二阈值时，判断同一所述行驱动线对应的列接收线均未发生触控，
    所述基准值指所述触摸屏未被触控时所述多个差分放大信号的平均值。
  6. 如权利要求5所述的触摸屏组件，其特征在于，所述触摸检测电路包括多个第一电阻和第二电阻，所述第一电阻连接在所述第一差分放大器的一个输入端和输出端之间，所述第二电阻连接在所述第二差分放大器的一个输入端和输出端之间。
  7. 如权利要求5所述的触摸屏组件，其特征在于，所述第一差分放大器的两个输入端分别与两条相邻的所述列接收线连接。
  8. 如权利要求5所述的触摸屏组件，其特征在于，所述触摸检测电路包括两个所述第二差分放大器，所述两个第二差分放大器分别与第1条所述列接收线和第i条所述列接收线的输出连接，i为所述列接收线的数量。
  9. 如权利要求5所述的触摸屏组件，其特征在于，所述驱动电路包括行驱动电路，所述行驱动电路用于逐行向所述行驱动线提供所述驱动信号。
  10. 如权利要求5所述的触摸屏组件，其特征在于，所述驱动电路包括行驱动电路和多路选择器，所述多路选择器连接所述行驱动电路和所述多条行驱动线，所述行驱动电路用于通过所述多路选择器实现对不同行的所述行驱动线同时提供所述驱动信号。
  11. 如权利要求5所述的触摸屏组件，其特征在于，所述处理电路包括：
    低通滤波器，用于移除所述多个第一差分放大器的输出信号的噪声以得到多个第一去噪信号，和移除所述第二差分放大器的输出信号的噪声以得到第二去噪信号；
    积分器，用于对所述多个第一去噪信号和所述第二去噪信号进行积分以得到多个第一积分信号和第二积分信号；
    采样和转换器，用于对所述多个第一积分信号和所述第二积分信号进行采样和模数转换以得到多个第一数字信号和第二数字信号，所述第一数字信号作为所述差分放大信号和所述 第二数字信号作为所述单端放大信号；
    处理器，用于处理所述第一数字信号和所述第二数字信号以得到所述第一绝对差值与所述第一阈值的关系及所述第二绝对差值与所述第二阈值的关系。
  12. 如权利要求5所述的触摸屏组件，其特征在于，所述列接收线的数量是i，所述单端放大信号包括放大所述第1条列接收线的输出而得到的第一单端放大信号，和放大所述第i条列接收线的输出而得到的第二单端放大信号，i>2且为自然数，所述多个差分放大信号包括i-1个差分放大信号，所述触摸检测电路用于：
    当所述第一单端放大信号与所述基准值的所述第二绝对差值不小于所述第二阈值，第1个所述差分放大信号与所述基准值的所述第一绝对差值大于所述第一阈值，第2个到第i-1个所述差分放大信号与所述基准值的所述第一绝对差值均小于所述第一阈值时，判断第1条所述列接收线发生触控；
    当第k个所述差分放大信号与所述基准值的所述第一绝对差值大于所述第一阈值，第1个至第k-1个所述差分放大信号与所述基准值的所述第一绝对差值均小于所述第一阈值时，判断第1条至第k条所述列接收线发生触控，1<k<i为自然数；
    当第k-1个和第k个所述差分放大信号与所述基准值的所述第一绝对差值大于所述第一阈值，第k-1个所述差分放大信号与所述基准值的差值与第k个所述差分放大信号与所述基准值的差值极性相反时，判断第k条所述列接收线发生触控；
    当第m个和第k个所述差分放大信号与所述基准值的所述第一绝对差值大于所述第一阈值，第m个所述差分放大信号与所述基准值的差值与第k个所述差分放大信号与所述基准值的差值极性相反，第m+1个到第k-1个所述差分放大信号与所述基准值的所述第一绝对差值均小于所述第一阈值时，判断第m+1条至第k条所述列接收线发生触控，k>m>＝1；
    当所述第二单端放大信号与所述基准值的所述第二绝对差值不小于所述第二阈值，第i-1个所述差分放大信号与所述基准值的所述第一绝对差值大于所述第一阈值，第1个至第i-2个所述差分放大信号与所述基准值的所述第一绝对差值均小于所述第一阈值时，判断第i条所述列接收线发生触控。
  13. 一种显示面板组件，其特征在于，包括显示面板和权利要求5-12任一项所述的触摸屏组件，所述触摸屏设置在所述显示面板上。
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