WO2020155093A1 - 触控装置及其驱动方法 - Google Patents

触控装置及其驱动方法 Download PDF

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Publication number
WO2020155093A1
WO2020155093A1 PCT/CN2019/074390 CN2019074390W WO2020155093A1 WO 2020155093 A1 WO2020155093 A1 WO 2020155093A1 CN 2019074390 W CN2019074390 W CN 2019074390W WO 2020155093 A1 WO2020155093 A1 WO 2020155093A1
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WIPO (PCT)
Prior art keywords
signal
sensing
driving
touch
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/074390
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English (en)
French (fr)
Inventor
李建鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Royole Technologies Co Ltd
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Shenzhen Royole Technologies Co Ltd
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Filing date
Publication date
Application filed by Shenzhen Royole Technologies Co Ltd filed Critical Shenzhen Royole Technologies Co Ltd
Priority to PCT/CN2019/074390 priority Critical patent/WO2020155093A1/zh
Priority to US17/427,654 priority patent/US20220129135A1/en
Priority to CN201980073422.2A priority patent/CN113508359A/zh
Publication of WO2020155093A1 publication Critical patent/WO2020155093A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • This application relates to the technical field of electronic equipment, and in particular to a touch device and a driving method thereof.
  • touch panel is susceptible to interference from other electronic components during use, resulting in inaccurate positioning of the touch coordinates.
  • the present application provides a touch device and a driving method thereof to effectively eliminate the noise signal contained in the sensing signal, so as to perform accurate touch sensing operation and improve the reliability of the touch sensing operation.
  • the present application provides a driving method of a touch device, the touch device includes a touch panel, and a plurality of driving circuits and a plurality of sensing circuits are provided on the touch panel.
  • the driving method includes:
  • Two driving signals with equal amplitude and opposite phase are input to the same driving circuit in one scanning period;
  • the present application provides a touch device including a touch panel and a touch drive IC.
  • the touch panel is provided with multiple drive circuits and multiple sensing circuits.
  • the touch drive IC is used for:
  • Two driving signals with equal amplitude and opposite phase are input to the same driving circuit in one scanning period;
  • the present application provides a method for driving a touch device.
  • the touch device includes a touch panel.
  • the touch panel includes a plurality of groups of driving lines arranged in a row direction and a plurality of groups arranged in a column direction.
  • Sensing line Each group of the driving lines includes a first driving line and a second driving line, and each group of the sensing lines includes a first sensing line corresponding to the first driving line of each group of driving lines and a first sensing line corresponding to each group of driving lines.
  • the driving method includes:
  • the sensing signal is received through the sensing circuit, and the transmission signal on the driving circuit that transmits the driving signal is detected, wherein the transmission signal is the driving signal transmitted by the corresponding driving circuit and the touch panel is transmitted to all The sum of the original noise signals of the corresponding driving circuit;
  • the single noise signal is used to respectively cancel or weaken the original noise signal contained in the sensing signal received by each sensing line.
  • the present application provides a touch device including a touch panel and a touch drive IC.
  • the touch panel includes multiple sets of drive circuits arranged in a row direction and multiple sets of sensing circuits arranged in a column direction.
  • Each group of the driving lines includes a first driving line and a second driving line
  • each group of the sensing lines includes a first sensing line corresponding to the first driving line of each group of driving lines and a first sensing line corresponding to each group of driving lines.
  • the touch drive IC is used for:
  • the sensing signal is received through the sensing circuit, and the transmission signal on the driving circuit that transmits the driving signal is detected, wherein the transmission signal is the driving signal transmitted by the corresponding driving circuit and the touch panel is transmitted to all The sum of the original noise signals of the corresponding driving circuit;
  • the single noise signal is used to respectively cancel or weaken the original noise signal contained in the sensing signal received by each sensing line.
  • the present application provides a method for driving a touch device, including:
  • the original noise signal contained in the sensing signal is removed or attenuated by the touch drive IC.
  • the touch device and its driving method provided in the first and second aspects of the present application are based on the structure of the existing touch device, by inputting two signals of equal amplitude and opposite phase to the same driving circuit within one scan period. Signal, and process the two sensing signals received by each sensing circuit corresponding to the two driving signals transmitted on the same driving circuit, so as to effectively remove or attenuate the two sensing signals received by each sensing circuit.
  • the original noise signal contained in the received sensing signal, and the single touch signal received by each sensing circuit is obtained, so that the touch driver IC 22 can perform accurate touch sensing operations according to the received sensing signal, and then Improve the reliability of touch sensing operation.
  • the touch control device and its driving method provided in the third and fourth aspects of the present application are based on the structure of the improved touch device and send amplitudes to two driving lines included in the same group of driving lines in one scan period.
  • Drive signals of equal and opposite phase While receiving the sensing signal through the sensing line, detecting the transmission signal on the driving line that transmits the driving signal, and processing the detected transmission signal to obtain a single noise signal contained in the transmission signal, The obtained single noise signal is then used to cancel or weaken the original noise signal contained in the sensing signal received by each sensing line to obtain the touch signal received by each sensing line, so that the The touch drive IC 22 can perform an accurate touch sensing operation according to the received sensing signal, thereby improving the reliability of the touch sensing operation.
  • FIG. 1 is a schematic structural diagram of a touch device provided by an embodiment of the application.
  • FIG. 2 is a schematic diagram of a touch sensing operation of a touch panel and a touch drive IC according to an embodiment of the application.
  • FIG. 3 is a schematic side view of the display panel and the touch panel shown in FIG. 1.
  • FIG. 4 is a schematic diagram of a transmission path of a noise signal from the display panel shown in FIG. 1 to the touch panel.
  • FIG. 5 is a schematic diagram of the direction of the touch signal when the driving signal TS is provided to the touch panel.
  • FIG. 6 is a schematic diagram of the direction of the touch signal when the driving signal -TS is provided to the touch panel.
  • FIG. 7 is a schematic diagram of subtracting two touch signals with opposite phases according to the first embodiment of the application.
  • FIG. 8 is a schematic diagram of subtracting two sensing signals according to the first embodiment of the application.
  • FIG. 9 is a schematic diagram of the circuit structure of the second signal processing module provided by the first embodiment of the application.
  • FIG. 10 is a schematic diagram of the configuration structure of the driving circuit and the sensing circuit of the touch panel according to the second embodiment of the application.
  • FIG. 11 is a schematic diagram of the structure of the touch panel and the touch drive IC according to the second embodiment of the application.
  • FIG. 12 is a schematic diagram of another transmission path for noise signals from the display panel shown in FIG. 1 to the touch panel.
  • FIG. 13 is a schematic diagram of another structure of the touch panel and the touch drive IC according to the second embodiment of the application.
  • FIG. 14 is a flowchart of a driving method of a touch device provided by the first embodiment of this application.
  • FIG. 15 is a flowchart of a method for driving a touch device according to a second embodiment of the application.
  • FIG. 16 is a flowchart of a method for driving a touch device according to a second embodiment of the application.
  • FIG. 1 is a schematic structural diagram of a touch device 100 provided by an embodiment of the application.
  • the touch device 100 can be applied to electronic products with touch display functions such as smart phones, tablet computers, and e-book readers.
  • the touch device 100 may include a touch panel 21, a touch drive integrated circuit (hereinafter referred to as “touch drive IC”) 22, a display panel 31, and a display drive integrated circuit (hereinafter referred to as “display drive IC”).
  • touch drive IC touch drive integrated circuit
  • display drive IC display drive integrated circuit
  • IC display drive integrated circuit
  • the touch panel 21 is disposed on the display panel 31, the touch panel 21 is used to sense the user's touch, and obtain the coordinate information of the area where the user touch is sensed, and the display panel 31 is used to Display text or images.
  • the touch panel 21 includes a plurality of drive lines Tx (also called “transmission lines”) arranged in the row direction and a plurality of sensing lines Rx (also called “transmission lines”) arranged in the column direction. As “receiving line” or “sensing line”).
  • the touch panel 21 can receive a driving signal through the driving line Tx, and send a touch signal through the sensing line Rx.
  • the touch driving IC 22 is electrically connected to the plurality of driving lines Tx and the plurality of sensing lines Rx, and the touch driving IC 22 sends driving signals to the touch panel 21 through the plurality of driving lines Tx, A touch signal is received through the sensing line Rx, and it is determined whether a user touch event occurs on the touch panel 21 based on the touch signal received by the sensing line Rx.
  • the touch panel 21 can be various sensing types, such as self-capacitance, mutual capacitance, electromagnetic induction, or resistive touch panels.
  • sensing types such as self-capacitance, mutual capacitance, electromagnetic induction, or resistive touch panels.
  • the embodiments of the inventive concept will be described below based on a mutual capacitance type touch panel.
  • the touch sensing operation of the touch panel 21 and the touch drive IC 22 will be briefly introduced below in conjunction with FIG. 2.
  • the touch panel 21 includes four driving lines Tx1 to Tx4 extending in the row direction and four sensing lines Rx1 to Rx4 extending in the column direction. It can be understood that in the present application, the touch panel 21 is not limited to the structure shown in FIG. 2, and further includes more driving lines and more sensing lines. In addition, for ease of description, the driving lines Tx1 to Tx4 and the sensing lines Rx1 to Rx4 are shown in straight lines in FIG. 2, but are not limited to this in practical applications.
  • the touch driving IC 22 can input driving signals TS to the driving lines Tx1 to Tx4, and receive touch signals through the sensing lines Rx1 to Rx4.
  • the touch drive IC 22 can provide a drive signal TS to the touch panel 21 through a second drive line Tx2, and the drive signal TS provided to the second drive line Tx2 can be coupled to the first drive line Tx2.
  • the mutual capacitor Cm between the second driving circuit Tx2 and the second sensing circuit Rx2 is returned to the touch driving IC 22. If the user touches the area where the second driving line Tx2 and the second sensing line Rx2 intersect, the capacitance of the mutual capacitor Cm located in the touched area changes due to the user's touch.
  • the touch signal received through the second sensing line Rx2 changes as the capacitance of the mutual capacitor Cm changes, and therefore, the touch driving IC 22 can sense the touch signal change, that is, sense the user's touch.
  • the driving lines Tx1 to Tx4 and the sensing lines Rx1 to Rx4 are shown as crossing each other in FIG. 2. It can be understood that, in practical applications, the driving lines Tx1 to Tx4 and the sensing lines Rx1 to Rx4 can be set to be separated from each other by a certain distance.
  • FIG. 3 it is a schematic side view of the display panel 31 and the touch panel 21. A plurality of the driving circuits Tx are arranged on the lower surface of the touch panel 21, and a plurality of the sensing circuits Rx are arranged on the upper surface of the touch panel 21.
  • the arrangement of the driving lines Tx1 to Tx4 and the sensing lines Rx1 to Rx4 may not be limited to the configurations shown in FIGS. 2 and 3, and the driving lines Tx1 to Tx4 and the sensing lines Rx1 to Rx1 to Rx4 can also be set in other ways.
  • the display panel 31 may include a plurality of pixels, and the pixels may be connected to the gate line GL and the data line DL. Each pixel may display an image in response to a signal from a corresponding one of the gate lines GL and a signal from a corresponding one of the data lines DL.
  • the display panel 31 may be one of an organic light emitting display panel, a liquid crystal display panel, a plasma display panel, an electrophoretic display panel, an electrowetting display panel, and the like.
  • the display driving IC 32 may be electrically connected to the display panel 31 through the gate line GL and the data line DL, and may respond to a control signal (for example, vertical synchronization) from an external device (for example, a timing controller). Signal and horizontal synchronization signal) to control the voltage of the gate line GL and the data line DL.
  • a control signal for example, vertical synchronization
  • an external device for example, a timing controller.
  • Signal and horizontal synchronization signal to control the voltage of the gate line GL and the data line DL.
  • noise may be generated on the display panel 31.
  • the noise may be generated by various electronic components of the display panel 31, or may be a noise signal transmitted by the various electronic components.
  • the noise signal may be an irregular voltage signal.
  • the touch panel 21 Since the touch panel 21 is disposed on the display panel 31, there will be one or more parasitic capacitors between the touch panel 21 and the display panel 31, which are generated on the display panel 31
  • the noise signal of is transmitted to the touch panel 21 through the one or more parasitic capacitors.
  • the noise signal transmitted to the touch panel 21 will reduce the reliability of the touch sensing operation of the touch panel 21 and the touch drive IC 22, for example, due to the noise signal coupled to the touch panel 21 As a result, the touch drive IC 22 cannot accurately detect the user's touch.
  • the touch panel 21 since the touch panel 21 may be coupled with a noise signal, the touch signal received through the sensing line Rx may also be superimposed with a noise signal. Therefore, in this application, the sensing line The signal received by Rx is called the "sensing signal".
  • the touch panel 21 and the display panel 31 may be arranged to be separated from each other by a first height h1.
  • the driving signal TS provided by the touch driving IC 22 to the touch panel 21 through the first driving line Tx1 can be provided to the first sensing line Rx1 along the first path P1, and through the first sensing line Rx1 Return to the touch drive IC 22.
  • the noise signal Vn will be coupled to the touch panel through the parasitic capacitor Cr existing between the touch panel 21 and the display panel 31 21, and is transmitted to the touch driver IC22.
  • the first sensing line Rx1 is separated from the display panel 31 by a first height h1 due to being disposed on the touch panel 21. Therefore, the parasitic capacitor Cr exists between the first sensing line Rx1 and the display panel 31, and becomes a transmission path of the noise signal Vn generated in the display panel 31, that is, the second path P2 .
  • the noise signal Vn generated in the display panel 31 can be transmitted to the touch driver IC 22 along the second path P2, so that the touch signal received by the touch driver IC 22 through the first sensing line Rx1
  • the noise signal Vn is superimposed in the TS, so that the touch drive IC 22 may not be able to perform an accurate touch sensing operation according to the received sensing signal, thereby reducing the reliability of the touch sensing operation.
  • the touch drive IC 22 is used to input two drive signals of equal amplitude and opposite phase to the same drive line Tx in one scan period.
  • the touch drive IC 22 inputs two drive signals to the same drive line Tx, one of which is an AC signal TS and the other is an AC signal -TS.
  • the touch driving IC 22 is used to continuously input two driving signals of equal amplitude and opposite phase to the same driving circuit in one scanning period.
  • the touch drive IC 22 also receives a sensing signal through the sensing line Rx.
  • the sensing signal received by each of the sensing lines Rx includes a touch signal and an original noise signal, and the two sensing signals received through the same sensing line Rx include The phases of the two touch signals are opposite.
  • the touch signal passes through the drive line Txm that transmits the drive signal, and is arranged between the drive line Txm and the sensing line Rxn.
  • the capacitor is transmitted to the sensing line Rxn, and finally to the touch drive IC 22.
  • the original noise signal is directly transmitted from the touch panel 21 to the sensing circuit Rxn, and is transmitted to the touch driving IC 22 through the sensing circuit Rxn.
  • the touch drive IC 22 provides a drive signal TS to the touch panel 21, when a finger touches the touch panel 21, a current loop is formed between the touch panel 21 and the finger, and The current is transmitted in the first direction D1.
  • the touch drive IC 22 again provides the drive signal -TS to the touch panel 21, when a finger touches the touch panel 21, current is transmitted in the second direction D2, wherein the first The two directions D2 and the first direction D1 are two opposite directions. It can be seen that since the phases of the two drive signals TS and -TS are opposite, the current signal flowing through the finger is also reversed. Therefore, as shown in FIG.
  • each The sensing line Rx also receives two sensing signals, and the touch signals in the two received sensing signals are TS and -TS respectively, that is, the phases of the two touch signals are opposite.
  • the touch driver IC 22 is also used to perform first signal processing on the two sensing signals received by each sensing line Rx and corresponding to the two driving signals transmitted on the same driving line, so as to remove or attenuate the The original noise signal contained in the sensing signal received by the sensing line Rx.
  • the first signal processing is to subtract the two sensing signals received by each of the sensing lines.
  • the sensing signal sensed for the first time includes the touch signal TS and the noise signal Vn.
  • the second sensed sensing signal includes the touch signal -TS and the noise signal Vn. Since the phases of the noise signals Vn sensed twice are the same, when the two received sense signals are subtracted, the noise signals Vn in the two sense signals will cancel each other and obtain twice the touch signal.
  • the touch drive IC 22 may include a first signal processing module (not shown), and the first signal processing module is configured to perform processing on the two signals received by each of the sensing lines Rx.
  • the sensing signal is subjected to the first signal processing.
  • the function of the first signal processing module can be implemented by a subtractor.
  • the touch driver IC 22 is also used to perform second signal processing on the signal obtained after the first signal processing, so as to obtain a single touch signal received by each of the sensing lines Rx.
  • the second signal processing is to perform multiple conversion on the signal obtained after the first signal processing.
  • the touch driver IC 22 may further include a second signal processing module 222, and the second signal processing module 222 is used to perform processing on the signal obtained after the first signal processing.
  • the second signal processing is used to obtain a single touch signal received by the sensing circuit.
  • the function of the second signal processing module 222 may be implemented by an inverse adder A1.
  • the reverse adder A1 receives the signal obtained after the first signal processing through its inverting input terminal, that is, the double touch signal-2TS, and outputs the sensing line Rx through its output terminal. Single touch signal.
  • the doubled touch signal-2TS is input to the inverting input terminal of the inverting adder A1 through the resistor R1, and the inverting input terminal of the inverting adder A1 is passed through
  • the resistor R2 is electrically connected to the output terminal of the reverse adder A1, and the non-inverting input terminal + of the reverse adder A1 is grounded through the resistor.
  • Uo1 is the voltage output by the output terminal of the reverse adder A1.
  • the touch driver IC 22 may include a contact with the plurality of sensing lines Rx.
  • the touch driver IC may include a contact with the plurality of sensing lines Rx.
  • the touch driver IC 22 When the touch driver IC 22 senses the user's touch by controlling the plurality of sensing lines Rx to sequentially receive touch signals, the touch driver IC may include one corresponding to the plurality of sensing lines Rx.
  • the first signal processing module and one second signal processing module 222, and the first signal processing module and the second signal processing module 222 are used to compare the sensing signals received by the plurality of sensing lines Rx The first signal processing and the second signal processing are sequentially performed.
  • the touch device 100 provided by the first embodiment is based on the structure of the existing touch device 100, by respectively inputting two driving signals of equal amplitude and opposite phase to the same driving circuit within one scanning period. And perform signal processing on the two sensing signals received by each sensing circuit corresponding to the two driving signals transmitted on the same driving circuit, so as to effectively remove or weaken the sensing received by each sensing circuit
  • the original noise signal contained in the signal, and the single touch signal received by each sensing line is obtained, so that the touch driver IC 22 can perform accurate touch sensing operations according to the received sensing signal, thereby improving the touch sensing The reliability of the test operation.
  • FIG. 10 is a schematic diagram of the configuration structure of the driving circuit and the sensing circuit of the touch panel 21 according to the second embodiment of the application.
  • the touch panel 21 includes multiple sets of driving lines Tx arranged in the row direction and multiple sets of sensing lines Rx arranged in the column direction.
  • each group of the driving lines Tx includes a first driving line and a second driving line
  • each group of the sensing lines Rx includes a first sensing line corresponding to the first driving line of each group of driving lines Tx and a first sensing line corresponding to The second sensing line of the second driving line of each group of driving lines Rx.
  • FIG. 10 shows 2 sets of driving lines Tx1 to Tx2 and 4 sets of sensing lines Rx1 to Rx4, where the driving line Tx1 includes a first driving line Tx11 and a second driving line Tx12, and the driving line Tx2 includes a first A driving line Tx21 and a second driving line Tx22.
  • the sensing line Rx1 includes a first sensing line Rx11 and a second sensing line Rx12
  • the sensing line Rx2 includes a first sensing line Rx21 and a second sensing line Rx22
  • the sensing line Rx3 includes a first sensing line Rx31
  • the second sensing line Rx32 and the sensing line Rx4 include a first sensing line Rx41 and a second sensing line Rx42. It can be understood that in the second embodiment, the touch panel 21 is not limited to the configuration shown in FIG. 10, and further includes more sets of driving circuits and more sets of sensing circuits.
  • each first driving line and each second driving line are alternately arranged in the row direction of the touch panel 21.
  • each first driving line is arranged in odd rows/even rows
  • each second driving line is arranged in even rows/odd rows
  • each first sensing line is located in the odd row/even row in the direction of the column where it is located.
  • Each first drive line of the row corresponds to each second sensing line in the column direction where it is located corresponds to each second drive line located in the even row/odd row.
  • the touch drive IC 22 is used to simultaneously input the same amplitude and opposite phase to the first drive line and the second drive line included in the same group of the drive lines Tx in one scan period. Drive signal.
  • the touch drive IC 22 inputs an AC signal TS to the first drive line Tx11 of the drive line Tx1, and simultaneously inputs an AC signal -TS to the second drive line Tx12.
  • the touch driving IC 22 also receives a sensing signal through the sensing line Rx, and detects the transmission signal on the driving line that transmits the driving signal.
  • the sensing signal received by each sensing line includes a touch signal and an original noise signal.
  • a certain sensing line Rxij it corresponds to a certain driving line Txkj that transmits the driving signal, and the touch signal is set on the driving line Txkj and the sensing line through the driving line Txkj.
  • the mutual capacitor between Rxij is transferred to the sensing line Rxij, and finally transferred to the touch drive IC 22.
  • the original noise signal is directly transferred from the touch panel 21 to the sensing line Rxij, and is transferred to the touch driving IC 22 through the sensing line Rxij.
  • the noise signal Vn will not only be transmitted to the touch drive IC 22 through the wiring of the sensing line, but also through the wiring of the drive line.
  • the wire is transferred to the touch drive IC 22.
  • the first sensing line Rx11 and the first driving line Tx11 are separated from the display panel 31 by a first height h1 because they are disposed on the touch panel 21. Therefore, the parasitic capacitor Cr1 exists between the first sensing line Rx11 and the display panel 31 and becomes a transmission path of the noise signal Vn generated in the display panel 31, that is, the second path P2. In the same way, the parasitic capacitor Cr2 will exist between the first driving line Tx11 and the display panel 31 and become another transmission path of the noise signal Vn, that is, the third path P3.
  • the noise signal Vn generated in the display panel 31 can be transmitted to the touch drive IC 22 along the second path P2, so that the touch drive IC 22 receives the touch through the first sensing line Rx11.
  • the noise signal Vn is superimposed on the signal TS.
  • the noise signal Vn can also be transmitted to the touch drive IC 22 along the third path P3, so that the transmission of the drive signal transmitted by the drive line Tx11 and the touch panel 21 can be detected through the drive line Tx11. Give the sum of noise signals to the drive line Tx11.
  • the transmission signal is the sum of the driving signal transmitted by the corresponding driving circuit and the original noise signal transmitted by the touch panel to the corresponding driving circuit.
  • the transmission signal includes a first transmission signal and a second transmission signal, wherein the first transmission signal is a driving signal transmitted by a corresponding first driving line and the contact The sum of the noise signals transmitted by the control panel 21 to the corresponding first driving line, the second transmission signal is the driving signal transmitted by the corresponding second driving line and the touch panel 21 is transmitted to the corresponding first The sum of the original noise signals of the two drive lines.
  • the touch drive IC 22 is also used to perform signal processing on the detected transmission signal to obtain a single noise signal contained in the transmission signal.
  • the touch driving IC 22 may further include a plurality of third signal processing modules 223 corresponding to a plurality of groups of the driving lines Tx, and the third signal The processing module 223 is configured to perform the signal processing on the transmission signal detected on the corresponding drive line Tx to obtain a single noise signal contained in the transmission signal.
  • the third signal processing module 223 includes a reverse adder A2, and the reverse adder A2 is used to add the transmission signal detected on the corresponding drive line to obtain the The sum of two noise signals contained in the transmission signal.
  • the driving signals included in the transmission signal are mutually cancelled when the inverse adder A2 performs the addition operation.
  • the touch drive IC 22 inputs an AC signal TS to the first drive line Tx11 of the drive line Tx1, and simultaneously inputs an AC signal -TS to the second drive line Tx12.
  • the detection terminal D11 on the first driving line Tx11 is also electrically connected to the inverting input terminal of the inverting adder A2 through the resistor R3, so that the inverting adder A2 receives The first transmission signal detected on the first driving line Tx11.
  • the detection terminal D12 on the second driving line Tx12 is also electrically connected to the inverting input terminal of the inverting adder A2 through the resistor R3, so that the inverting adder A2 receives The second transmission signal detected on the second drive line Tx12.
  • the inverting input terminal-of the reverse adder A2 is also electrically connected to the output terminal of the reverse adder A2 through a resistor R3, and the non-inverting input terminal + of the reverse adder A2 is grounded through a resistor.
  • the voltage of the detection terminal D11 is TS+Vn
  • the voltage of the detection terminal D12 is -TS+Vn.
  • the third signal processing module 223 further includes an inverse adder A3, and the inverse adder A3 is used to add the sum of the two noise signals to A single noise signal contained in the transmission signal is obtained.
  • the output terminal of the inverted adder A2 is electrically connected to the inverted input terminal of the inverted adder A3 through a resistor R4, so that the inverted adder A3 passes through it.
  • the inverting input terminal receives the sum of the two noise signals output by the inverting adder A2.
  • the inverting input terminal-of the reverse adder A3 is electrically connected to the output terminal of the reverse adder A3 through a resistor R5, and the non-inverting input terminal + of the reverse adder A3 is grounded through a resistor.
  • the touch driver IC 22 is also used to use the single noise signal to respectively cancel or attenuate the original noise signal contained in the sensing signal received by each sensing line.
  • the touch drive IC 22 may further include a plurality of fourth signal processing modules 224 corresponding to a plurality of the sensing lines, and the fourth signal The processing module 224 is configured to use the single noise signal to cancel the original noise signal contained in the sensing signal received by the corresponding sensing line to obtain the corresponding sensing line received touch signal.
  • the function of the fourth signal processing module 224 can be implemented by a difference operator A4.
  • the differential arithmetic unit A4 is used to perform a differential operation on the sensing signal received by the corresponding sensing line and the single noise signal to obtain the touch signal received by the corresponding sensing line.
  • the output terminal of the inverted adder A3 is electrically connected to the inverted input terminal of the differential operator A4 through a resistor R6, that is, the single noise signal Vn output by the inverted adder A3 It is input to the inverting input terminal-of the difference operator A4.
  • the inverting input terminal of the differential arithmetic unit A4 is electrically connected to the output terminal of the differential arithmetic unit A4 through a resistor R7.
  • the first sensing line Rx11 is also electrically connected to the non-inverting input terminal + of the differential arithmetic unit A4 through a resistor R8, that is, the sensing signal TS+Vn received by the first sensing line Rx11 is input to the The non-inverting input terminal-of the differential arithmetic unit A4, and the non-inverting input terminal + of the differential arithmetic unit A4 are also grounded through a resistor R9.
  • Uo4 is the voltage outputted by the output terminal of the differential arithmetic unit A4.
  • the resistances of the resistors R6, R7, R8, and R9 are equal.
  • FIG. 11 only shows the third signal processing module 223 corresponding to one group of driving lines Tx1 and the fourth signal processing module 224 corresponding to one of the sensing lines Rx11.
  • FIG. 13 shows two fourth signal processing modules 224 corresponding to one group of sensing lines Rx1.
  • the touch device 100 provided by the second embodiment improves the structure of the existing touch device 100, and simultaneously sends amplitudes to two driving lines included in the same group of driving lines within one scan period.
  • Drive signals of equal value and opposite phase. While receiving the sensing signal through the sensing line, detecting the transmission signal on the driving line that transmits the driving signal, and processing the detected transmission signal to obtain a single noise signal contained in the transmission signal, Reuse the obtained single noise signal to respectively cancel or weaken the original noise signal contained in the sensing signal received by each sensing line to obtain the touch signal received by each sensing line, thereby enabling the
  • the touch drive IC 22 can perform an accurate touch sensing operation according to the received sensing signal, thereby improving the reliability of the touch sensing operation.
  • FIG. 14 is a flowchart of a method for driving a touch device according to the first embodiment of the application.
  • the driving method is used to drive and control the touch device provided by the first embodiment. As shown in FIG. 14, the driving method includes the following steps.
  • step 1401 the touch drive IC 22 respectively inputs two drive signals of equal amplitude and opposite phase to the same drive circuit in one scanning period.
  • the touch drive IC 22 respectively inputs two drive signals to the same drive line Tx, where one drive signal is an AC signal TS, and the other drive signal is an AC signal -TS.
  • the touch driving IC 22 continuously inputs two driving signals of equal amplitude and opposite phase to the same driving circuit in one scanning period.
  • Step 1402 The touch driver IC 22 receives a sensing signal through the sensing circuit.
  • the sensing signal received by each of the sensing lines Rx includes a touch signal and an original noise signal
  • the two sensing signals received through the same sensing line Rx include The phases of the two touch signals are opposite.
  • the touch signal is transmitted to the sensing line through a driving line Txm that transmits the driving signal, and a mutual capacitor provided between the driving line Txm and the sensing line Rxn.
  • the test circuit Rxn it is finally transmitted to the touch drive IC 22.
  • the original noise signal is directly transmitted from the touch panel to the sensing circuit Rxn, and is transmitted to the touch driving IC 22 through the sensing circuit Rxn.
  • Step 1403 The touch driver IC 22 performs first signal processing on the two sensing signals received by each sensing circuit and corresponding to the two driving signals transmitted on the same driving circuit, so as to remove or attenuate each of the two sensing signals.
  • the first signal processing is to subtract the two sensing signals received by each of the sensing lines. It is understandable that, as shown in FIG. 8, since the two touch signals contained in the two sensing signals received through the same sensing line Rx have opposite phases, the two noise signals have the same phase. , When the two sensing signals are subtracted, the two noise signals in the two sensing signals will cancel each other, and twice the touch signal will be obtained.
  • Step 1404 The touch driver IC performs second signal processing on the signal obtained after the first signal processing, to obtain a single touch signal received by each of the sensing lines.
  • the second signal processing is to perform multiple conversion on the signal obtained after the first signal processing.
  • the second signal processing is to use an inverse adder to add the signal obtained after the first signal processing to obtain the signal received by the sensing line Single touch signal.
  • the driving method provided by the first embodiment is based on the structure of the existing touch device, by inputting two driving signals of equal amplitude and opposite phase to the same driving circuit in a scanning period, Two sensing signals corresponding to the two driving signals transmitted on the same driving line received by the two sensing lines are processed to effectively remove or attenuate the sensing signals received by each sensing line.
  • FIG. 15 is a flowchart of a method for driving a touch device according to a second embodiment of the application.
  • the driving method is used for driving and controlling the touch device provided by the second embodiment. As shown in FIG. 15, the driving method includes the following steps.
  • step 1501 the touch driving IC 22 simultaneously inputs driving signals of equal amplitude and opposite phase to the first driving line and the second driving line included in the same group of driving lines in one scanning period.
  • Step 1502 the touch driver IC 22 receives the sensing signal through the sensing circuit, and detects the transmission signal on the driving circuit that transmits the driving signal.
  • the sensing signal received by each sensing line includes a touch signal and an original noise signal.
  • a certain sensing line Rxij it corresponds to a certain driving line Txkj that transmits the driving signal, and the touch signal is set on the driving line Txkj and the sensing line through the driving line Txkj.
  • the mutual capacitor between Rxij is transferred to the sensing line Rxij, and finally transferred to the touch drive IC 22.
  • the original noise signal is directly transferred from the touch panel 21 to the sensing line Rxij, and is transferred to the touch driving IC 22 through the sensing line Rxij.
  • the transmission signal is the sum of the driving signal transmitted by the corresponding driving circuit and the original noise signal transmitted by the touch panel to the corresponding driving circuit.
  • the transmission signal includes a first transmission signal and a second transmission signal, wherein the first transmission signal is a driving signal transmitted by a corresponding first driving line and the contact The sum of the noise signals transmitted by the control panel 21 to the corresponding first driving line, the second transmission signal is the driving signal transmitted by the corresponding second driving line and the touch panel 21 is transmitted to the corresponding first The sum of the original noise signals of the two drive lines.
  • Step 1503 The touch driver IC 22 performs signal processing on the detected transmission signal to obtain a single noise signal contained in the transmission signal.
  • the step 1503 includes:
  • a second inverse adder is used to add the sum of the two noise signals to obtain a single noise signal contained in the transmission signal.
  • Step 1504 the touch driver IC 22 uses the single noise signal to respectively cancel or attenuate the original noise signal contained in the sensing signal received by each sensing line.
  • the step 1504 specifically includes:
  • a differential operator is used to perform differential operations on the sensing signal received by each sensing line and the single noise signal to obtain the touch signal received by each sensing line.
  • the driving method provided by the second embodiment is based on the structure of the improved touch device, and in one scan period, two driving lines included in the same group of driving lines are simultaneously sent driving signals with equal amplitude and opposite phases. . While receiving the sensing signal through the sensing line, detecting the transmission signal on the driving line that transmits the driving signal, and processing the detected transmission signal to obtain a single noise signal contained in the transmission signal, Reuse the obtained single noise signal to respectively cancel or weaken the original noise signal contained in the sensing signal received by each sensing line to obtain the touch signal received by each sensing line, thereby enabling the
  • the touch drive IC 22 can perform an accurate touch sensing operation according to the received sensing signal, thereby improving the reliability of the touch sensing operation.
  • FIG. 16 is a flowchart of a driving method of a touch device according to a third embodiment of the application. As shown in FIG. 16, the driving method includes the following steps.
  • Step 1601 Input two drive signals of equal amplitude and opposite phase to the drive circuit.
  • Step 1602 Obtain a sensing signal through the sensing line.
  • step 1603 the original noise signal contained in the sensing signal is removed or attenuated by the touch drive IC.
  • the driving method shown in FIG. 16 can be used to drive and control the touch device provided in the first embodiment. It can be understood that the driving method can also be used to drive and control other touch devices.
  • the step 1601 may include: respectively inputting two driving signals of equal amplitude and opposite phase to the same driving circuit within one scanning period.
  • the two driving signals are continuously input to the same driving circuit.
  • the step 1602 may include: respectively acquiring two sensing signals corresponding to two driving signals transmitted on the same driving line through a sensing line, wherein each of the sensing signals includes a touch signal and the original noise Signal, the phases of the two touch signals included in the two sensing signals acquired through the same sensing line are opposite.
  • the step 1603 may include: subtracting the two sensing signals acquired by the same sensing line through the touch drive IC to remove or weaken the original noise signal.
  • step 1603 it may further include: restoring the two subtracted sensing signals into a single touch signal to obtain a single touch signal received by each sensing line.
  • two driving signals of equal amplitude and opposite phase are input to the same driving circuit in a scanning period, and the corresponding driving signals received by each sensing circuit
  • the two sensing signals of the two driving signals transmitted on the same driving line are subtracted, so as to effectively remove or attenuate the original noise signal contained in the sensing signal received by each sensing line, and obtain
  • the single touch signal received by each sensing circuit enables the touch drive IC 22 to perform an accurate touch sensing operation according to the received sensing signal, thereby improving the reliability of the touch sensing operation.
  • the driving method shown in FIG. 16 is used to drive and control the touch device provided in the second embodiment. It can be understood that the driving method can also be used to drive and control other touch devices.
  • the step 1601 may include: simultaneously inputting two driving signals of equal amplitude and opposite phase to two adjacent driving circuits in one scanning period.
  • the method may further include: obtaining a noise signal through a driving line that transmits the driving signal.
  • obtaining the noise signal through the drive line that transmits the drive signal may include:
  • the output double noise signal is restored to a single noise signal through the touch drive IC.
  • the sensing signal includes a touch signal and the original noise signal.
  • the step 1603 may include: canceling the single noise signal and the original noise signal in the sensing signal through the touch drive IC to obtain the sensing signal obtained by each sensing line Touch signal contained in.
  • driving signals with equal amplitude and opposite phase are simultaneously input to two adjacent driving lines. While receiving the sensing signal through the sensing line, the noise signal is acquired through the driving line that transmits the driving signal, and then the acquired noise signal is used to cancel or weaken the sensing received by each sensing line The original noise signal contained in the signal is used to obtain the touch signal received by each sensing line, so that the touch driver IC 22 can perform accurate touch sensing operations according to the received sensing signal, thereby improving the touch sensing Operational reliability.

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Abstract

本申请提供一种触控装置(100)及其驱动方法，所述触控装置(100)包括触控面板(21)以及触摸驱动IC(22)，所述触控面板(21)上设置有多条驱动线路(Tx)以及多条感测线路(Rx)。所述驱动方法包括：给驱动线路输入幅值相等、相位相反的两个驱动信号(1601)；通过感测线路获取感测信号(1602)；以及通过触摸驱动IC将所述感测信号中包含的原始噪声信号去除或减弱(1603)。

Description

触控装置及其驱动方法 技术领域
本申请涉及电子设备技术领域，尤其涉及一种触控装置及其驱动方法。
背景技术
随着触控技术的发展，越来越多电子设备配置了触控面板。然而，触控面板在使用过程中容易受到其他电子元器件的干扰，从而出现触摸坐标定位不准确的问题。
发明内容
本申请提供一种触控装置及其驱动方法，以有效地消除感测信号中包含的噪声信号，从而能够执行精确的触摸感测操作，提高触摸感测操作的可靠性。
第一方面，本申请提供一种触控装置的驱动方法，所述触控装置包括触控面板，所述触控面板上设置有多条驱动线路以及多条感测线路。所述驱动方法包括：
在一个扫描周期内给同一条驱动线路分别输入幅值相等、相位相反的两个驱动信号；
通过所述感测线路接收感测信号；以及
对各条感测线路接收到的对应于同一条驱动线路上传输的两个驱动信号的两个感测信号进行第一信号处理，以去除或减弱各条所述感测线路所接收到的感测信号中包含的原始噪声信号。
第二方面，本申请提供一种触控装置，包括触控面板以及触摸驱动IC，所述触控面板上设置有多条驱动线路以及多条感测线路。所述触摸驱动IC用于：
在一个扫描周期内给同一条驱动线路分别输入幅值相等、相位相反的两个驱动信号；
通过所述感测线路接收感测信号；以及
对各条感测线路接收到的对应于同一条驱动线路上传输的两个驱动信号的两个感测信号进行第一信号处理，以去除或减弱各条所述感测线路所接收到的感测信号中包含的噪声信号。
第三方面，本申请提供一种触控装置的驱动方法，所述触控装置包括触控面板，所述触控面板包括设置于行方向上的多组驱动线路以及设置于列方向上的多组感测线路。每组所述驱动线路包括第一驱动线和第二驱动线，每组所述感测线路包括对应于各组驱动线路的第一驱动线的第一感测线和对应于各组驱动线路的第二驱动线的第二感测线。所述驱动方法包括：
在一个扫描周期内，给同一组驱动线路包括的第一驱动线和第二驱动线同时输入幅值相等、相位相反的驱动信号；
通过所述感测线路接收感测信号，并检测传输所述驱动信号的驱动线路上的传输信号，其中，所述传输信号为相应的驱动线路传输的驱动信号与所述触控面板传递给所述相应的驱动线路的原始噪声信号之和；
对检测到的所述传输信号进行信号处理，以获得所述传输信号中包含的单个噪声信号；以及
利用所述单个噪声信号来分别抵消或减弱各条感测线所接收到的感测信号中包含的原始噪声信号。
第四方面，本申请提供一种触控装置，包括触控面板以及触摸驱动IC，所述触控面板包括设置于行方向上的多组驱动线路以及设置于列方向上的多组感测线路。每组所述驱动线路包括第一驱动线和第二驱动线，每组所述感测线路包括对应于各组驱动线路的第一驱动线的第一感测线和对应于各组驱动线路的第二驱动线的第二感测线。所述触摸驱动IC用于：
在一个扫描周期内，给同一组驱动线路包括的第一驱动线和第二驱动线同时输入幅值相等、相位相反的驱动信号；
通过所述感测线路接收感测信号，并检测传输所述驱动信号的驱动线路上的传输信号，其中，所述传输信号为相应的驱动线路传输的驱动信号与所述触控面板传递给所述相应的驱动线路的原始噪声信号之和；
对检测到的所述传输信号进行信号处理，以获得所述传输信号中包含的单个噪声信号；以及
利用所述单个噪声信号来分别抵消或减弱各条感测线所接收到的感测信号中包含的原始噪声信号。
第五方面，本申请提供一种触控装置的驱动方法，包括：
给驱动线路输入幅值相等、相位相反的两个驱动信号；
通过感测线路获取感测信号；以及
通过触摸驱动IC将所述感测信号中包含的原始噪声信号去除或减弱。
本申请第一、二方面提供的所述触控装置及其驱动方法，基于现有的触控装置的结构，通过在一个扫描周期内给同一条驱动线路分别输入幅值相等、相位相反的两个驱动信号，并对各条感测线路接收到的对应于同一条驱动线路上传输的两个驱动信号的两个感测信号进行信号处理，以有效地去除或减弱各条感测线路所接收到的感测信号中包含的原始噪声信号，并获得各条感测线路接收到的单个触摸信号，从而使所述触摸驱动IC22能够根据接收到的感测信号执行精确的触摸感测操作，进而提高了触摸感测操作的可靠性。
本申请第三、四方面提供的所述触控装置及其驱动方法，基于改进后的触控装置的结构，在一个扫描周期内，给同一组驱动线路包括的两条驱动线同时发送幅值相等、相位相反的驱动信号。在通过所述感测线路接收感测信号的同时，检测传输所述驱动信号的驱动线路上的传输信号，并对检测到的传输信号进行处理以获得所述传输信号中包含的单个噪声信号，再利用获得的所述单个噪声信号来分别抵消或减弱各条感测线所接收到的感测信号中包含的原始噪声信号，以获得各条感测线接收到触摸信号，从而可使所述触摸驱动IC22能够根据接收到的感测信号执行精确的触摸感测操作，进而提高了触摸感测操作的可靠性。
附图说明
为了更清楚地说明本申请实施方式或现有技术中的技术方案，下面将对实施方式或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的触控装置的结构示意图。
图2为本申请实施例的触控面板和触摸驱动IC的触摸感测操作的示意图。
图3为图1所示的显示面板与触控面板的侧面示意图。
图4为噪声信号从图1所示的显示面板传输到触控面板的传输路径示意图。
图5为向所述触控面板提供驱动信号TS时的触摸信号的方向示意图。
图6为向所述触控面板提供驱动信号-TS时的触摸信号的方向示意图。
图7为本申请第一实施例将相位相反的两个触摸信号相减的示意图。
图8为本申请第一实施例将两个感测信号相减的示意图。
图9为本申请第一实施例提供的第二信号处理模块的电路结构示意图。
图10为本申请第二实施例的触控面板的驱动线路和感测线路的配置结构示意图。
图11为本申请第二实施例的触控面板以及触摸驱动IC的结构示意图。
图12为噪声信号从图1所示的显示面板传输到所述触控面板的另一种传输路径示意图。
图13为本申请第二实施例的触控面板以及触摸驱动IC的另一种结构示意图。
图14为本申请第一实施例提供的一种触控装置的驱动方法的流程图。
图15为本申请第二实施例提供的一种触控装置的驱动方法的流程图。
图16为本申请第二实施例提供的一种触控装置的驱动方法的流程图。
具体实施方式
下面将结合本申请实施方式中的附图，对本申请实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式仅仅是本申请一部分实施方式，而不是全部的实施方式。基于本申请中的实施方式，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式，都属于本申请保护的范围。
请参阅图1，为本申请实施例提供的触控装置100的结构示意图。在本实施例中，所述触控装置100可应用于智能手机、平板电脑、电子书阅读器等具有触摸显示功能的电子产品中。
如图1所示，所述触控装置100可包括触控面板21、触摸驱动集成电路(以下简称为“触摸驱动IC”)22、显示面板31和显示驱动集成电路(以下简称为“显示驱动IC”)32。其中，所述触控面板21设置于所述显示面板31上，所述触控面板21用于感测用户触摸，并获得感测到用户触摸的区域的坐标信息，所述显示面板31用于显示文字或图像。
如图2所示，所述触控面板21包括设置于行方向上的多条驱动线路Tx(也可称为“发送线”)以及设置于列方向上的多条感测线路Rx(也可称为“接收线”或“感应线”)。所述触控面板21可通过所述驱动线路Tx接收驱动信号，并通过所述感测线路Rx发送触摸信号。
所述触摸驱动IC22分别与所述多条驱动线路Tx和所述多条感测线路Rx电连接，所述触摸驱动IC22通过所述多条驱动线路Tx给所述触控面板21发送驱动信号，并通过所述感测线路Rx接收触摸信号，以及基于所述感测线路Rx接收到的触摸信号确定在所述触控面板21上是否发生用户触摸事件。
在本实施例中，所述触控面板21可为各种感测类型，例如自电容、互电容、电磁感应或电阻式等的触控面板。为了易于描述，以下将基于互电容类型的触控面板来描述本发明构思的实施例。此外，为了更好地理解本申请的发明构思，以下将结合图2来对所述触控面板21和所述触摸驱动IC22的触摸感测操作先做简单的介绍。
如图2所示，所述触控面板21包括沿行方向延伸的4条驱动线路Tx1～Tx4和沿列方向延伸的4条感测线路Rx1～Rx4。可以理解的是，在本申请中，所述触控面板21不限于图2中示出的构造，并且还包括更多条驱动线路以及更多条感测线路。此外，为了易于描述，所述驱动线路Tx1～Tx4和所述感测线路Rx1～Rx4在图2中均以直线示出，但在实际应用中并不限于此。
所述触摸驱动IC22可给所述驱动线路Tx1～Tx4输入驱动信号TS，并通过所述感测线路Rx1～Rx4接收触摸信号。例如图2所示，所述触摸驱动IC22可通过第二驱动线路Tx2向所述触控面板21提供驱动信号TS，提供到所述第二驱动线路Tx2的驱动信号TS可通过耦合于所述第二驱动线路Tx2和第二感测线路Rx2之间的互电容器Cm返回到所述触摸驱动IC22。若用户触摸所述第二驱动线路Tx2和所述第二感测线路Rx2交叉处的区域，则位于被触摸的区域的所述互电容器Cm的电容由于用户触摸而改变。通过第二感测线路Rx2接收到的触摸信号随着互电 容器Cm的电容的改变而改变，因此，所述触摸驱动IC22可以感测到触摸信号改变，即，感测到用户触摸。
为了易于描述，所述驱动线路Tx1～Tx4和所述感测线路Rx1～Rx4在图2中示出为彼此交叉。可以理解的是，在实际应用中，所述驱动线路Tx1～Tx4和所述感测线路Rx1～Rx4可设置为彼此分隔开一定距离。例如图3所示，为所述显示面板31与所述触控面板21的侧面示意图。多条所述驱动线路Tx配置于所述触控面板21的下表面，多条所述感测线路Rx配置于所述触控面板21的上表面。可以理解的是，所述驱动线路Tx1～Tx4和所述感测线路Rx1～Rx4的设置可不限于图2、3中示出的构造，所述驱动线路Tx1～Tx4和所述感测线路Rx1～Rx4也可以以其他方式设置。
请再次参阅图1，所述显示面板31可包括多个像素，所述像素可与栅极线GL和数据线DL连接。每个像素可响应于来自所述栅极线GL中的对应的一条栅极线的信号以及来自数据线DL中的对应的一条数据线的信号来显示图像。其中，所述显示面板31可为有机发光显示面板、液晶显示面板、等离子体显示面板、电泳显示面板和电润湿显示面板等的其中一种。
所述显示驱动IC32可通过所述栅极线GL以及所述数据线DL与所述显示面板31电连接，并可响应于来自外部装置(例如，时序控制器)的控制信号(例如，垂直同步信号和水平同步信号)来控制所述栅极线GL和所述数据线DL的电压。
当所述显示驱动IC32将信号提供到与所述显示面板31连接的数据线DL或栅极线GL，或者操作所述显示面板31时，所述显示面板31上可能会产生噪声。可以理解的是，所述噪声可以是由所述显示面板31的各种电子组件产生，或者可以是所述各种电子组件传输的噪声信号。其中，所述噪声信号可为不规则的电压信号。
由于所述触控面板21设置于所述显示面板31上，因此，在所述触控面板21和所述显示面板31之间会存在一个或多个寄生电容器，产生于所述显示面板31上的噪声信号会通过所述一个或多个寄生电容器被传输到所述触控面板21。传输到所述触控面板21的噪声信号会造成所述触控面板21和所述触摸驱动IC22的触摸感测操作的可靠性的降低，例如，由于所述触控面板21上耦合有噪声信号，导致所述触摸驱动IC22无法精确地检测用户触摸。
在本实施例中，由于所述触控面板21上可能耦合有噪声信号，使得通过所述感测线路Rx接收的触摸信号还可能叠加了噪声信号，因此，本申请中将所述感测线路Rx接收到的信号称为“感测信号”。
为了更好地理解本申请的发明构思，以下将结合图4来对所述显示面板31上的噪声信号的传输先做简单的介绍。应说明的是，为了简化说明，图4中省略了描述所述噪声信号所不必要的组件。
如图4所示，所述触控面板21和所述显示面板31可设置为彼此分隔开第一高度h1。所述触摸驱动IC22通过第一驱动线路Tx1提供给所述触控面板21的驱动信号TS可沿第一路径P1提供到所述第一感测线路Rx1，并通过所述第一感测线路Rx1返回到所述触摸驱动IC22中。
在所述显示面板31上产生有噪声信号Vn的情况下，所述噪声信号Vn会通过存在于所述触控面板21和所述显示面板31之间的寄生电容器Cr耦合到所述触控面板21，并被传输到所述触摸驱动IC22。
例如，第一感测线路Rx1由于设置在所述触控面板21上而与所述显示面板31彼此分隔开第一高度h1。因此，所述寄生电容器Cr会存在于所述第一感测线路Rx1和所述显示面板31之间，并成为产生于所述显示面板31的噪声信号Vn的传输路径，即，第二路径P2。如此，所述显示面板31中产生的噪声信号Vn可沿所述第二路径P2传递到所述触摸驱动IC22，从而使所述 触摸驱动IC22通过所述第一感测线路Rx1接收到的触摸信号TS中叠加了所述噪声信号Vn，导致所述触摸驱动IC22根据接收到的感测信号可能无法执行精确的触摸感测操作，从而降低触摸感测操作的可靠性。
为了提高触摸感测操作的可靠性，以下将对本申请如何消除所述感测信号中的噪声信号进行详细介绍。
在第一实施例中，所述触摸驱动IC22用于在一个扫描周期内给同一条驱动线路Tx分别输入幅值相等、相位相反的两个驱动信号。
例如，在一个扫描周期内，所述触摸驱动IC22给同一条所述驱动线路Tx分别输入两个驱动信号，其中一个驱动信号为交流信号TS，另一个驱动信号为交流信号-TS。
在所述第一实施例中，所述触摸驱动IC22用于在一个扫描周期内给同一条驱动线路连续输入幅值相等、相位相反的两个驱动信号。
在所述第一实施例中，所述触摸驱动IC22还通过所述感测线路Rx接收感测信号。其中，各条所述感测线路Rx所接收到的所述感测信号包括触摸信号和原始噪声信号，且通过同一条所述感测线路Rx所接收到的所述两个感测信号中包含的两个触摸信号的相位相反。
对于某条感测线路Rxn来说，结合图2、4可知，所述触摸信号通过传输所述驱动信号的驱动线路Txm、设置在所述驱动线路Txm与所述感测线路Rxn之间的互电容器来传输到所述感测线路Rxn上，最终传输到所述触摸驱动IC22中。所述原始噪声信号直接从所述触控面板21传递到所述感测线路Rxn上，并通过所述感测线路Rxn传递到所述触摸驱动IC22中。
如图5所示，若所述触摸驱动IC22给所述触控面板21提供驱动信号TS，当手指触摸所述触控面板21时，所述触控面板21与手指之间形成电流回路，且电流沿第一方向D1传输。如图6所示，若所述触摸驱动IC22再次给所述触控面板21提供驱动信号-TS，当手指触摸所述触控面板21时，电流沿第二方向D2传输，其中，所述第二方向D2与所述第一方向D1为相反的两个方向。可见，由于两个驱动信号TS与-TS的相位相反，所以流经手指的电流信号也是反向的。因此，如图7所示，当所述触摸驱动IC22给同一条驱动线路Tx分别输入两个驱动信号，且其中一个驱动信号为交流信号TS，另一个驱动信号为交流信号-TS时，各条所述感测线路Rx也接收到两个感测信号，且接收到的两个感测信号中的触摸信号分别为TS和-TS，即，两个触摸信号的相位相反。
所述触摸驱动IC22还用于对各条感测线路Rx接收到的对应于同一条驱动线路上传输的两个驱动信号的两个感测信号进行第一信号处理，以去除或减弱各条所述感测线路Rx所接收到的感测信号中包含的原始噪声信号。其中，在所述第一实施例中，所述第一信号处理为将各条所述感测线路接收到的所述两个感测信号相减。
如图7所示，由于同一条感测线路Rx接收到的两个触摸信号的相位相反，因此，将两个触摸信号相减不会使两者相互抵消，而是获得两倍的触摸信号。
如图8所示，当所述感测信号中包含有噪声信号Vn时，对于同一条感测线路Rx来说，第一次感测到的感测信号包括触摸信号TS和噪声信号Vn，第二次感测到的感测信号包括触摸信号-TS和噪声信号Vn。由于两次感测到的噪声信号Vn的相位相同，将接收到的两个感测信号相减时，两个感测信号中的噪声信号Vn会相互抵消，并获得两倍的触摸信号。
在一种实施例中，所述触摸驱动IC22可包括第一信号处理模块(图未示)，所述第一信号处理模块用于对各条所述感测线路Rx接收到的所述两个感测信号进行所述第一信号处理。其中，所述第一信号处理模块的功能可采用一减法器来实现。
在所述第一实施例中，所述触摸驱动IC22还用于对经过第一信号处理后得到的信号进行第二信号处理，以获得各条所述感测线路Rx接收到的单个触摸信号。如上所述，由于经过第一信号处理后获得两倍的触摸信号，在所述第一实施例中，所述第二信号处理为对经过第一信号处理后得到的信号进行倍数转换。
在一种实施例中，如图9所示，所述触摸驱动IC22还可包括第二信号处理模块222，所述第二信号处理模块222用于对经过第一信号处理后得到的信号进行所述第二信号处理，以获得所述感测线路接收到的单个触摸信号。
具体地，所述第二信号处理模块222的功能可采用一反向加法运算器A1来实现。所述反向加法运算器A1通过其反相输入端接收经过所述第一信号处理后得到的信号，即两倍的触摸信号-2TS，并通过其输出端输出所述感测线路Rx接收到的单个触摸信号。
如图9所示，所述两倍的触摸信号-2TS通过电阻R1输入到所述反向加法运算器A1的反相输入端-，所述反向加法运算器A1的反相输入端-通过电阻R2电连接至所述反向加法运算器A1的输出端，所述反向加法运算器A1的同相输入端+通过电阻接地。
在图9中，由“虚短”概念可知，所述反向加法运算器A1的两个输入端的电压U-、U+相等，即：
U-＝U+＝0                                           (1)
由“虚断”概念及基尔霍夫定律可知，通过电阻R1的电流等于通过电阻R2的电流，故有：
((-2TS)-U-)/R1＝(U--Uo1)/R2                          (2)
其中，Uo1为所述反向加法运算器A1的输出端输出的电压。
在所述第一实施例中，所述电阻R1、R2的阻值的关系为：R1＝2R2，结合上面的两个公式(1)和(2)可知，所述反向加法运算器A1的输出端输出的电压Uo1为：Uo1＝TS，即，所述反向加法运算器A1输出的信号等于所述感测线路Rx接收到的单个触摸信号TS。
可以理解的是，当所述触摸驱动IC22采用控制所述多条感测线路Rx同时接收触摸信号的方式来感测用户触摸时，所述触摸驱动IC可包括与所述多条感测线路Rx一一对应的多个所述第一信号处理模块和多个所述第二信号处理模块222，所述多个第一信号处理模块和多个所述第二信号处理模块222分别用于对相应的感测线路Rx接收到的感测信号进行所述第一信号处理以及所述第二信号处理。当所述触摸驱动IC22采用控制所述多条感测线路Rx依次接收触摸信号的方式来感测用户触摸时，所述触摸驱动IC可包括与所述多条感测线路Rx分别对应的一个所述第一信号处理模块和一个所述第二信号处理模块222，所述第一信号处理模块和所述第二信号处理模块222用于对多条所述感测线路Rx接收到的感测信号依次进行所述第一信号处理和所述第二信号处理。
所述第一实施例提供的所述触控装置100基于现有的触控装置100的结构，通过在一个扫描周期内给同一条驱动线路分别输入幅值相等、相位相反的两个驱动信号，并对各条感测线路接收到的对应于同一条驱动线路上传输的两个驱动信号的两个感测信号进行信号处理，以有效地去除或减弱各条感测线路所接收到的感测信号中包含的原始噪声信号，并获得各条感测线路接收到的单个触摸信号，从而使所述触摸驱动IC22能够根据接收到的感测信号执行精确的触摸感测操作，进而提高了触摸感测操作的可靠性。
请参阅图10，为本申请第二实施例提供的触控面板21的驱动线路和感测线路的配置结构示意图。如图10所示，在所述第二实施例中，所述触控面板21包括设置于行方向上的多组驱动线路Tx以及设置于列方向上的多组感测线路Rx。其中，每组所述驱动线路Tx包括第一驱动线和 第二驱动线，每组所述感测线路Rx包括对应于各组驱动线路Tx的第一驱动线的第一感测线和对应于各组驱动线路Rx的第二驱动线的第二感测线。
为了易于描述，图10中示出了2组驱动线路Tx1～Tx2和4组感测线路Rx1～Rx4，其中，驱动线路Tx1包括第一驱动线Tx11和第二驱动线Tx12，驱动线路Tx2包括第一驱动线Tx21和第二驱动线Tx22。感测线路Rx1包括第一感测线Rx11和第二感测线Rx12，感测线路Rx2包括第一感测线Rx21和第二感测线Rx22，感测线路Rx3包括第一感测线Rx31和第二感测线Rx32，感测线路Rx4包括第一感测线Rx41和第二感测线Rx42。可以理解的是，在所述第二实施例中，所述触控面板21不限于图10中示出的构造，并且还包括更多组驱动线路以及更多组感测线路。
在所述第二实施例中，各条第一驱动线与各条第二驱动线交替设置于所述触控面板21的行方向上。如此，各条第一驱动线设置于奇数行/偶数行，各条第二驱动线设置于偶数行/奇数行，各条第一感测线在其所在的列方向上与位于奇数行/偶数行的各条第一驱动线对应，各条第二感测线在其所在的列方向上与位于偶数行/奇数行的各条第二驱动线对应。
在所述第二实施例中，所述触摸驱动IC22用于在一个扫描周期内，给同一组所述驱动线路Tx包括的第一驱动线和第二驱动线同时输入幅值相等、相位相反的驱动信号。
例如图11所示，在一个扫描周期内，所述触摸驱动IC22给驱动线路Tx1的第一驱动线Tx11输入交流信号TS，同时给第二驱动线Tx12输入交流信号-TS。
在所述第二实施例中，所述触摸驱动IC22还通过所述感测线路Rx接收感测信号，并检测传输所述驱动信号的驱动线路上的传输信号。
在所述第二实施例中，各条感测线所接收到的所述感测信号包括触摸信号和原始噪声信号。其中，对于某条感测线Rxij说，其与传输所述驱动信号的某条驱动线Txkj对应，所述触摸信号通过所述驱动线Txkj、设置在所述驱动线Txkj与所述感测线Rxij之间的互电容器来传输到所述感测线Rxij上，并最终传输到所述触摸驱动IC22中。所述原始噪声信号直接从所述触控面板21传递到所述感测线Rxij上，并通过所述感测线Rxij传递到所述触摸驱动IC22中。
可以理解的是，在所述触控面板21耦合了噪声信号Vn后，所述噪声信号Vn不仅会通过感测线的走线传输到所述触摸驱动IC22中，同时还可通过驱动线的走线传输到所述触摸驱动IC22中。
例如图12所示，所述第一感测线Rx11以及所述第一驱动线Tx11由于设置在所述触控面板21上而与所述显示面板31彼此分隔开第一高度h1。因此，寄生电容器Cr1会存在于所述第一感测线Rx11和所述显示面板31之间，并成为产生于所述显示面板31的噪声信号Vn的传输路径，即，第二路径P2。同理，寄生电容器Cr2会存在于所述第一驱动线Tx11和所述显示面板31之间，并成为所述噪声信号Vn的另一传输路径，即，第三路径P3。如此，所述显示面板31中产生的噪声信号Vn可沿所述第二路径P2传递到所述触摸驱动IC22中，从而使所述触摸驱动IC22通过所述第一感测线Rx11接收到的触摸信号TS中叠加了所述噪声信号Vn。同时，所述噪声信号Vn还可沿所述第三路径P3传递到所述触摸驱动IC22中，从而通过驱动线Tx11可检测到所述驱动线Tx11传输的驱动信号与所述触控面板21传递给所述驱动线Tx11噪声信号之和。
在所述第二实施例中，所述传输信号为相应的驱动线路传输的驱动信号与所述触控面板传递给所述相应的驱动线路的原始噪声信号之和。具体地，在所述第二实施例中，所述传输信号包括第一传输信号和第二传输信号，其中，所述第一传输信号为相应的第一驱动线传输的驱动信号与所述触控面板21传递给所述相应的第一驱动线的噪声信号之和，所述第二传输信号为相应的第二驱动线传输的驱动信号与所述触控面板21传递给所述相应的第二驱动线的原始噪声信号之 和。
在所述第二实施例中，所述触摸驱动IC22还用于对检测到的所述传输信号进行信号处理，以获得所述传输信号中包含的单个噪声信号。
在一种实施例中，如图11及图13所示，所述触摸驱动IC22还可包括与多组所述驱动线路Tx一一对应的多个第三信号处理模块223，所述第三信号处理模块223用于对在相应的驱动线路Tx上检测到的所述传输信号进行所述信号处理，以获得所述传输信号中包含的单个噪声信号。
具体地，所述第三信号处理模块223包括反向加法运算器A2，所述反向加法运算器A2用于对在相应的驱动线路上检测到的所述传输信号进行加法运算，以获得所述传输信号中包含的两个噪声信号之和。其中，所述传输信号中包含的驱动信号在所述反向加法运算器A2进行加法运算时被相互抵消。
例如图11所示，所述触摸驱动IC22给驱动线路Tx1的第一驱动线Tx11输入交流信号TS，同时给第二驱动线Tx12输入交流信号-TS。所述第一驱动线Tx11上的检测端D11还通过电阻R3电连接至反向加法运算器A2的反相输入端-，从而使所述反向加法运算器A2通过其反相输入端接收在所述第一驱动线Tx11上检测到的第一传输信号。所述第二驱动线Tx12上的检测端D12还通过电阻R3电连接至反向加法运算器A2的反相输入端-，从而使所述反向加法运算器A2通过其反相输入端接收在所述第二驱动线Tx12上检测到的第二传输信号。所述反向加法运算器A2的反相输入端-还通过电阻R3电连接至所述反向加法运算器A2的输出端，所述反向加法运算器A2的同相输入端+通过电阻接地。
其中，所述检测端D11的电压为TS+Vn，所述检测端D12的电压为-TS+Vn，结合前面已经详细介绍过的反向加法运算器A1的输出端的电压的计算原理可知，所述反向加法运算器A2的输出端的电压为-2Vn。
在所述一种实施例中，所述第三信号处理模块223还包括反向加法运算器A3，所述反向加法运算器A3用于对所述两个噪声信号之和进行加法运算，以获得所述传输信号中包含的单个噪声信号。
例如图11所示，所述反向加法运算器A2的输出端通过电阻R4电连接至所述反向加法运算器A3的反相输入端-，从而使所述反向加法运算器A3通过其反相输入端接收所述反向加法运算器A2输出的所述两个噪声信号之和。所述反向加法运算器A3的反相输入端-通过电阻R5电连接至所述反向加法运算器A3的输出端，所述反向加法运算器A3的同相输入端+通过电阻接地。
其中，所述电阻R4、R5的阻值的关系为：R4＝2R5。结合前面已经详细介绍过的反向加法运算器A1的输出端的电压的计算原理可知，所述反向加法运算器A3的输出端输出的信号为Vn。
在所述第二实施例中，所述触摸驱动IC22还用于利用所述单个噪声信号来分别抵消或减弱各条感测线所接收到的感测信号中包含的原始噪声信号。
在一种实施例中，如图11及图13所示，所述触摸驱动IC22还可包括与多条所述感测线一一对应的多个第四信号处理模块224，所述第四信号处理模块224用于利用所述单个噪声信号来抵消相应的感测线所接收到的感测信号中包含的原始噪声信号，以获得相应的感测线接收到触摸信号。
具体地，所述第四信号处理模块224的功能可通过一差分运算器A4来实现。所述差分运算器A4用于对相应的感测线所接收到的感测信号以及所述单个噪声信号进行差分运算，以获得相应的感测线接收到的触摸信号。
例如图11所示，所述反向加法运算器A3的输出端通过电阻R6电连接至差分运算器A4的 反相输入端-，即，所述反向加法运算器A3输出的单个噪声信号Vn被输入到所述差分运算器A4的反相输入端-。所述差分运算器A4的反相输入端-通过电阻R7电连接至所述差分运算器A4的输出端。所述第一感测线Rx11还通过电阻R8电连接至所述差分运算器A4的同相输入端+，即，所述第一感测线Rx11接收到的感测信号TS+Vn被输入到所述差分运算器A4的同相输入端-，所述差分运算器A4的同相输入端+还通过电阻R9接地。
在图11中，由“虚短”概念可知，所述差分运算器A4的两个输入端的电压U-、U+相等，即：
U-＝U+                                        (3)
由“虚断”概念及基尔霍夫定律可知，通过电阻R6的电流等于通过电阻R7的电流，通过电阻R8的电流等于通过电阻R9的电流，故有：
(Vn-U-)/R6＝(U--Uo4)/R7                          (4)
((TS+Vn)-U+)/R8＝U+/R9                           (5)
其中，Uo4为差分运算器A4的输出端输出的电压。
在所述第二实施例中，所述电阻R6、R7、R8、R9的阻值相等，结合上面的三个公式(3)～(5)可知，所述差分运算器A4的输出端输出的电压Uo4为：Uo4＝TS，所述差分运算器A4输出的信号等于相应的感测线接收到的触摸信号TS。
为了易于说明，图11中仅示出了其中一组驱动线路Tx1对应的第三信号处理模块223，以及其中一条感测线Rx11对应的第四信号处理模块224。图13中示出了其中一组感测线路Rx1对应的两个第四信号处理模块224。
所述第二实施例提供的所述触控装置100，通过对现有的触控装置100的结构进行改进，并在一个扫描周期内，给同一组驱动线路包括的两条驱动线同时发送幅值相等、相位相反的驱动信号。在通过所述感测线路接收感测信号的同时，检测传输所述驱动信号的驱动线路上的传输信号，并对检测到的传输信号进行处理以获得所述传输信号中包含的单个噪声信号，再利用获得的所述单个噪声信号来分别抵消或减弱各条感测线所接收到的感测信号中包含的原始噪声信号，以获得各条感测线接收到触摸信号，从而可使所述触摸驱动IC22能够根据接收到的感测信号执行精确的触摸感测操作，进而提高了触摸感测操作的可靠性。
请参阅图14，为本申请第一实施例提供的一种触控装置的驱动方法的流程图，所述驱动方法用于对上述第一实施例提供的触控装置进行驱动控制。如图14所示，所述驱动方法包括以下步骤。
步骤1401，所述触摸驱动IC22在一个扫描周期内给同一条驱动线路分别输入幅值相等、相位相反的两个驱动信号。
例如，在一个扫描周期内，所述触摸驱动IC22给同一条所述驱动线路Tx分别输入两个驱动信号，其中一个驱动信号为交流信号TS，另一个驱动信号为交流信号-TS。
在所述第一实施例中，所述触摸驱动IC22在一个扫描周期内给同一条驱动线路连续输入幅值相等、相位相反的两个驱动信号。
步骤1402，所述触摸驱动IC22通过所述感测线路接收感测信号。
其中，各条所述感测线路Rx所接收到的所述感测信号包括触摸信号和原始噪声信号，且通过同一条所述感测线路Rx所接收到的所述两个感测信号中包含的两个触摸信号的相位相反。
对于某条感测线路Rxn来说，所述触摸信号通过传输所述驱动信号的驱动线路Txm、设置在所述驱动线路Txm与所述感测线路Rxn之间的互电容器来传输到所述感测线路Rxn上，最终 传输到所述触摸驱动IC22中。所述原始噪声信号直接从所述触控面板传递到所述感测线路Rxn上，并通过所述感测线路Rxn传递到所述触摸驱动IC22中。
步骤1403，所述触摸驱动IC22对各条感测线路接收到的对应于同一条驱动线路上传输的两个驱动信号的两个感测信号进行第一信号处理，以去除或减弱各条所述感测线路所接收到的感测信号中包含的原始噪声信号。
其中，在所述第一实施例中，所述第一信号处理为将各条所述感测线路接收到的所述两个感测信号相减。可以理解的是，如图8所示，由于通过同一条所述感测线路Rx所接收到的所述两个感测信号中包含的两个触摸信号的相位相反、两个噪声信号的相位相同，将所述两个感测信号相减时，两个感测信号中的两个噪声信号会相互抵消，并获得两倍的触摸信号。
步骤1404，所述触摸驱动IC对经过第一信号处理后得到的信号进行第二信号处理，以获得各条所述感测线路接收到的单个触摸信号。
如上所述，由于经过第一信号处理后获得两倍的触摸信号，在所述第一实施例中，所述第二信号处理为对经过第一信号处理后得到的信号进行倍数转换。
具体地，在所述第一实施例中，所述第二信号处理为利用反向加法运算器对经过所述第一信号处理后得到的信号进行加法运算，以获得所述感测线路接收到的单个触摸信号。
所述第一实施例提供的所述驱动方法基于现有的触控装置的结构，通过在一个扫描周期内给同一条驱动线路分别输入幅值相等、相位相反的两个驱动信号，并对各条感测线路接收到的对应于同一条驱动线路上传输的两个驱动信号的两个感测信号进行信号处理，以有效地去除或减弱各条感测线路所接收到的感测信号中包含的原始噪声信号，并获得各条感测线路接收到的单个触摸信号，从而使所述触摸驱动IC22能够根据接收到的感测信号执行精确的触摸感测操作，进而提高了触摸感测操作的可靠性。
请参阅图15，为本申请第二实施例提供的一种触控装置的驱动方法的流程图，所述驱动方法用于对上述第二实施例提供的触控装置进行驱动控制。如图15所示，所述驱动方法包括以下步骤。
步骤1501，所述触摸驱动IC22在一个扫描周期内，给同一组驱动线路包括的第一驱动线和第二驱动线同时输入幅值相等、相位相反的驱动信号。
步骤1502，所述触摸驱动IC22通过所述感测线路接收感测信号，并检测传输所述驱动信号的驱动线路上的传输信号。
在所述第二实施例中，各条感测线所接收到的所述感测信号包括触摸信号和原始噪声信号。其中，对于某条感测线Rxij说，其与传输所述驱动信号的某条驱动线Txkj对应，所述触摸信号通过所述驱动线Txkj、设置在所述驱动线Txkj与所述感测线Rxij之间的互电容器来传输到所述感测线Rxij上，并最终传输到所述触摸驱动IC22中。所述原始噪声信号直接从所述触控面板21传递到所述感测线Rxij上，并通过所述感测线Rxij传递到所述触摸驱动IC22中。
在所述第二实施例中，所述传输信号为相应的驱动线路传输的驱动信号与所述触控面板传递给所述相应的驱动线路的原始噪声信号之和。具体地，在所述第二实施例中，所述传输信号包括第一传输信号和第二传输信号，其中，所述第一传输信号为相应的第一驱动线传输的驱动信号与所述触控面板21传递给所述相应的第一驱动线的噪声信号之和，所述第二传输信号为相应的第二驱动线传输的驱动信号与所述触控面板21传递给所述相应的第二驱动线的原始噪声信号之和。
步骤1503，所述触摸驱动IC22对检测到的所述传输信号进行信号处理，以获得所述传输信 号中包含的单个噪声信号。
在一种实施例中，所述步骤1503包括：
利用第一反向加法运算器对检测到的所述传输信号进行加法运算，以获得所述传输信号中包含的两个噪声信号之和；以及
利用第二反向加法运算器对所述两个噪声信号之和进行加法运算，以获得所述传输信号中包含的单个噪声信号。
步骤1504，所述触摸驱动IC22利用所述单个噪声信号来分别抵消或减弱各条感测线所接收到的感测信号中包含的原始噪声信号。
在一种实施例中，所述步骤1504具体包括：
利用差分运算器分别对各条感测线所接收到的感测信号以及所述单个噪声信号进行差分运算，以获得各条感测线接收到的触摸信号。
所述第二实施例提供的所述驱动方法基于改进后的触控装置的结构，在一个扫描周期内，给同一组驱动线路包括的两条驱动线同时发送幅值相等、相位相反的驱动信号。在通过所述感测线路接收感测信号的同时，检测传输所述驱动信号的驱动线路上的传输信号，并对检测到的传输信号进行处理以获得所述传输信号中包含的单个噪声信号，再利用获得的所述单个噪声信号来分别抵消或减弱各条感测线所接收到的感测信号中包含的原始噪声信号，以获得各条感测线接收到触摸信号，从而可使所述触摸驱动IC22能够根据接收到的感测信号执行精确的触摸感测操作，进而提高了触摸感测操作的可靠性。
请参阅图16，为本申请第三实施例提供的一种触控装置的驱动方法的流程图。如图16所示，所述驱动方法包括以下步骤。
步骤1601，给驱动线路输入幅值相等、相位相反的两个驱动信号。
步骤1602，通过感测线路获取感测信号。
步骤1603，通过触摸驱动IC将所述感测信号中包含的原始噪声信号去除或减弱。
在一种实施方式中，图16所示的驱动方法可用于对上述第一实施例提供的触控装置进行驱动控制。可以理解的是，所述驱动方法也可用于对其他触控装置进行驱动控制。
具体地，所述步骤1601可包括：在一个扫描周期内给同一条驱动线路分别输入幅值相等、相位相反的两个驱动信号。
进一步地，所述两个驱动信号是连续输入同一条驱动线路中的。
所述步骤1602可包括：通过感测线路分别获取对应于同一条驱动线路上传输的两个驱动信号的两个感测信号，其中，每一所述感测信号包括触摸信号和所述原始噪声信号，通过同一条所述感测线路获取到的所述两个感测信号中包含的两个触摸信号的相位相反。
所述步骤1603可包括：通过所述触摸驱动IC对同一条所述感测线路获取到的所述两个感测信号进行相减而去除或减弱所述原始噪声信号。
进一步地，在所述步骤1603之后，还可包括：将相减的两个感测信号复原成单个触摸信号，以得到各条感测线路接收到的单个触摸信号。
所述一种实施方式中提供的所述驱动方法，通过在一个扫描周期内给同一条驱动线路分别输入幅值相等、相位相反的两个驱动信号，并对各条感测线路接收到的对应于同一条驱动线路上传输的两个驱动信号的两个感测信号进行相减，从而能够有效地去除或减弱各条感测线路所接收到的感测信号中包含的原始噪声信号，并获得各条感测线路接收到的单个触摸信号，从而使所述触摸驱动IC22能够根据接收到的感测信号执行精确的触摸感测操作，进而提高了触摸感测操作的 可靠性。
在另一种实施方式中，图16所示的驱动方法用于对上述第二实施例提供的触控装置进行驱动控制。可以理解的是，所述驱动方法也可用于对其他触控装置进行驱动控制。
具体地，所述步骤1601可包括：在一个扫描周期内，分别给相邻的两条驱动线路同时输入幅值相等、相位相反的两个驱动信号。
在所述步骤1601之后，还可包括：通过传输所述驱动信号的驱动线路获取噪声信号。
进一步地，通过传输所述驱动信号的驱动线路获取噪声信号可包括：
从发送所述驱动信号的两条驱动线路上分别获取所述触控面板传递的原始噪声信号和相应的驱动信号；
通过触摸驱动IC对从所述两条驱动线路上获取到的信号进行处理，以去除获取到的信号中包含的驱动信号，并输出两倍噪声信号；以及
通过所述触摸驱动IC将输出的两倍噪声信号还原成单倍噪声信号。
其中，所述感测信号中包括触摸信号以及所述原始噪声信号。
进一步地，所述步骤1603可包括：通过所述触摸驱动IC将所述单倍噪声信号与所述感测信号中的原始噪声信号进行抵消，以得到各条感测线路获取到的感测信号中包含的触摸信号。
所述另一种实施方式中提供的所述驱动方法，在一个扫描周期内，给相邻两条驱动线路同时输入幅值相等、相位相反的驱动信号。在通过所述感测线路接收感测信号的同时，通过传输所述驱动信号的驱动线路获取噪声信号，再利用获取的所述噪声信号来抵消或减弱各条感测线路所接收到的感测信号中包含的原始噪声信号，以获得各条感测线路接收到触摸信号，从而可使所述触摸驱动IC22能够根据接收到的感测信号执行精确的触摸感测操作，进而提高了触摸感测操作的可靠性。
最后应说明的是，以上实施方式仅用以说明本申请的技术方案而非限制，尽管参照以上较佳实施方式对本申请进行了详细说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或等同替换都不应脱离本申请技术方案的精神和范围。

Claims (34)

  1. 一种触控装置的驱动方法，所述触控装置包括触控面板，所述触控面板上设置有多条驱动线路以及多条感测线路，其特征在于，所述驱动方法包括：
    在一个扫描周期内给同一条驱动线路分别输入幅值相等、相位相反的两个驱动信号；
    通过所述感测线路接收感测信号；以及
    对各条感测线路接收到的对应于同一条驱动线路上传输的两个驱动信号的两个感测信号进行第一信号处理，以去除或减弱各条所述感测线路所接收到的感测信号中包含的原始噪声信号。
  2. 如权利要求1所述的驱动方法，其特征在于，在一个扫描周期内给同一条驱动线路分别输入幅值相等、相位相反的两个驱动信号包括：在一个扫描周期内给同一条驱动线路连续输入幅值相等、相位相反的两个驱动信号。
  3. 如权利要求1或2所述的驱动方法，其特征在于，各条所述感测线路所接收到的所述感测信号包括触摸信号以及所述原始噪声信号，且通过同一条所述感测线路所接收到的所述两个感测信号中包含的两个触摸信号的相位相反。
  4. 如权利要求3所述的驱动方法，其特征在于，所述第一信号处理为将各条所述感测线路接收到的所述两个感测信号相减。
  5. 如权利要求4所述的驱动方法，其特征在于，所述驱动方法还包括：
    对经过第一信号处理后得到的信号进行第二信号处理，以获得各条所述感测线路接收到的单个触摸信号。
  6. 如权利要求5所述的驱动方法，其特征在于，所述第二信号处理为利用反向加法运算器对经过所述第一信号处理后得到的信号进行加法运算，以获得所述感测线路接收到的单个触摸信号。
  7. 一种触控装置，包括触控面板以及触摸驱动IC，所述触控面板上设置有多条驱动线路以及多条感测线路，其特征在于，所述触摸驱动IC用于：
    在一个扫描周期内给同一条驱动线路分别输入幅值相等、相位相反的两个驱动信号；
    通过所述感测线路接收感测信号；以及
    对各条感测线路接收到的对应于同一条驱动线路上传输的两个驱动信号的两个感测信号进行第一信号处理，以去除或减弱各条所述感测线路所接收到的感测信号中包含的噪声信号。
  8. 如权利要求7所述的触控装置，其特征在于，所述触摸驱动IC在一个扫描周期内给同一条驱动线路连续输入幅值相等、相位相反的两个驱动信号。
  9. 如权利要求7或8所述的触控装置，其特征在于，各条所述感测线路所接收到的所述感测信号包括触摸信号以及所述噪声信号，且通过同一条所述感测线路所接收到的所述两个感测信号中包含的两个触摸信号的相位相反。
  10. 如权利要求9所述的触控装置，其特征在于，所述第一信号处理为将各条所述感测线路接收到的所述两个感测信号相减。
  11. 如权利要求10所述的触控装置，其特征在于，所述触摸驱动IC还用于对经过第一信号处理后得到的信号进行第二信号处理，以获得各条所述感测线路接收到的单个触摸信号。
  12. 如权利要求11所述的触控装置，其特征在于，所述触摸驱动IC包括反向加法运算器，所述反向加法运算器用于对经过所述第一信号处理后得到的信号进行加法运算，以获得所述感测线路接收到的单个触摸信号。
  13. 一种触控装置的驱动方法，所述触控装置包括触控面板，所述触控面板包括设置于行方向上的多组驱动线路以及设置于列方向上的多组感测线路，其特征在于，每组所述驱动线路包括第一驱动线和第二驱动线，每组所述感测线路包括对应于各组驱动线路的第一驱动线的第一感测线和对应于各组驱动线路的第二驱动线的第二感测线，所述驱动方法包括：
    在一个扫描周期内，给同一组驱动线路包括的第一驱动线和第二驱动线同时输入幅值相等、相位相反的驱动信号；
    通过所述感测线路接收感测信号，并检测传输所述驱动信号的驱动线路上的传输信号，其中，所述传输信号为相应的驱动线路传输的驱动信号与所述触控面板传递给所述相应的驱动线路的原始噪声信号之和；
    对检测到的所述传输信号进行信号处理，以获得所述传输信号中包含的单个噪声信号；以及
    利用所述单个噪声信号来分别抵消或减弱各条感测线所接收到的感测信号中包含的原始噪声信号。
  14. 如权利要求13所述的驱动方法，其特征在于，各条所述感测线所接收到的所述感测信号包括触摸信号以及所述原始噪声信号。
  15. 如权利要求13或14所述的驱动方法，其特征在于，所述传输信号包括：
    第一传输信号，其为相应的第一驱动线传输的驱动信号与所述触控面板传递给所述相应的第一驱动线的噪声信号之和；以及
    第二传输信号，其为相应的第二驱动线传输的驱动信号与所述触控面板传递给所述相应的第二驱动线的噪声信号之和。
  16. 如权利要求15所述的驱动方法，其特征在于，所述对检测到的所述传输信号进行信号处理，以获得所述传输信号中包含的单个噪声信号，包括：
    利用第一反向加法运算器对检测到的所述传输信号进行加法运算，以获得所述传输信号中包含的两个噪声信号之和；以及
    利用第二反向加法运算器对所述两个噪声信号之和进行加法运算，以获得所述传输信号中包含的单个噪声信号。
  17. 如权利要求16所述的驱动方法，其特征在于，利用所述单个噪声信号来分别抵消或减弱各条感测线所接收到的感测信号中包含的原始噪声信号，包括：
    利用差分运算器分别对各条感测线所接收到的感测信号以及所述单个噪声信号进行差分运算，以获得各条感测线接收到的触摸信号。
  18. 如权利要求13所述的驱动方法，其特征在于，各条第一驱动线与各条第二驱动线交替设置于所述触控面板的行方向上。
  19. 一种触控装置，包括触控面板以及触摸驱动IC，所述触控面板包括设置于行方向上的多组驱动线路以及设置于列方向上的多组感测线路，其特征在于，每组所述驱动线路包括第一驱动线和第二驱动线，每组所述感测线路包括对应于各组驱动线路的第一驱动线的第一感测线和对应于各组驱动线路的第二驱动线的第二感测线，所述触摸驱动IC用于：
    在一个扫描周期内，给同一组驱动线路包括的第一驱动线和第二驱动线同时输入幅值相等、相位相反的驱动信号；
    通过所述感测线路接收感测信号，并检测传输所述驱动信号的驱动线路上的传输信号，其中，所述传输信号为相应的驱动线路传输的驱动信号与所述触控面板传递给所述相应的驱动线路的原始噪声信号之和；
    对检测到的所述传输信号进行信号处理，以获得所述传输信号中包含的单个噪声信号；以及
    利用所述单个噪声信号来分别抵消或减弱各条感测线所接收到的感测信号中包含的原始噪声信号。
  20. 如权利要求19所述的触控装置，其特征在于，各条所述感测线所接收到的所述感测信号包括触摸信号以及所述原始噪声信号。
  21. 如权利要求19或20所述的触控装置，其特征在于，所述传输信号包括：
    第一传输信号，其为相应的第一驱动线传输的驱动信号与所述触控面板传递给所述相应的第一驱动线的噪声信号之和；以及
    第二传输信号，其为相应的第二驱动线传输的驱动信号与所述触控面板传递给所述相应的第二驱动线的噪声信号之和。
  22. 如权利要求21所述的触控装置，其特征在于，所述触摸驱动IC包括与多组所述驱动线路一一对应的多个信号处理模块，每一所述信号处理模块包括：
    第一反向加法运算器，用于对在相应的驱动线路上检测到的所述传输信号进行加法运算，以获得所述传输信号中包含的两个噪声信号之和；以及
    第二反向加法运算器，用于对所述两个噪声信号之和进行加法运算，以获得所述传输信号中包含的单个噪声信号。
  23. 如权利要求22所述的触控装置，其特征在于，所述触摸驱动IC还包括与多条所述感测线一一对应的多个差分运算器，每一所述差分运算器用于对相应的感测线所接收到的感测信号以及所述单个噪声信号进行差分运算，以获得相应的感测线接收到的触摸信号。
  24. 如权利要求19所述的触控装置，其特征在于，各条第一驱动线与各条第二驱动线交替设置于所述触控面板的行方向上。
  25. 一种触控装置的驱动方法，包括：
    给驱动线路输入幅值相等、相位相反的两个驱动信号；
    通过感测线路获取感测信号；以及
    通过触摸驱动IC将所述感测信号中包含的原始噪声信号去除或减弱。
  26. 如权利要求25所述的驱动方法，其特征在于，所述驱动方法还包括：通过传输所述驱动信号的驱动线路获取噪声信号。
  27. 如权利要求26所述的驱动方法，其特征在于，给驱动线路输入幅值相等、相位相反的两个驱动信号包括：
    在一个扫描周期内，分别给相邻的两条驱动线路同时输入幅值相等、相位相反的两个驱动信号。
  28. 如权利要求27所述的驱动方法，其特征在于，通过传输所述驱动信号的驱动线路获取噪声信号包括：
    从发送所述驱动信号的两条驱动线路上分别获取所述触控面板传递的原始噪声信号和相应的驱动信号；
    通过触摸驱动IC对从所述两条驱动线路上获取到的信号进行处理，以去除获取到的信号中包含的驱动信号，并输出两倍噪声信号；以及
    通过所述触摸驱动IC将输出的两倍噪声信号还原成单倍噪声信号。
  29. 如权利要求28所述的驱动方法，其特征在于，所述感测信号中包括触摸信号以及所述原始噪声信号，通过触摸驱动IC将所述感测信号中包含的原始噪声信号去除或减弱包括：
    通过所述触摸驱动IC将所述单倍噪声信号与所述感测信号中的原始噪声信号进行抵消，以得到各条感测线路获取到的感测信号中包含的触摸信号。
  30. 如权利要求25所述的驱动方法，其特征在于，给驱动线路输入幅值相等、相位相反的两个驱动信号包括：
    在一个扫描周期内给同一条驱动线路分别输入幅值相等、相位相反的两个驱动信号。
  31. 如权利要求30所述的驱动方法，其特征在于，在一个扫描周期内给同一条驱动线路分别输入幅值相等、相位相反的两个驱动信号包括：
    在一个扫描周期内给同一条驱动线路连续输入幅值相等、相位相反的两个驱动信号。
  32. 如权利要求30或31所述的驱动方法，其特征在于，通过感测线路获取感测信号包括：
    通过感测线路分别获取对应于同一条驱动线路上传输的两个驱动信号的两个感测信号，其中，每一所述感测信号包括触摸信号和所述原始噪声信号，通过同一条所述感测线路获取到的所述两个感测信号中包含的两个触摸信号的相位相反。
  33. 如权利要求32所述的驱动方法，其特征在于，通过触摸驱动IC将所述感测信号中包含的原始噪声信号去除或减弱，包括：
    通过所述触摸驱动IC对同一条所述感测线路获取到的所述两个感测信号进行相减而去除或减弱所述原始噪声信号。
  34. 如权利要求33所述的驱动方法，其特征在于，在去除或减弱所述噪声信号之后，所述驱动方法还包括步骤：
    将相减的两个感测信号复原成单个触摸信号，以得到各条感测线路接收到的单个触摸信号。
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