TW202030585A - Touch device and driving method thereof - Google Patents

Abstract

The present invention provides a touch control device and a driving method thereof. The touch control device includes a touch panel and a touch driving IC. The touch panel is provided with a plurality of driving circuits and a plurality of sensing circuits. The driving method includes: inputting two driving signals having the same amplitude and opposite phases to the driving circuits; acquiring sensing signals through the sensing circuits; and removing or weakening original noise signals contained in the sensing signals by using the touch driving IC.

Description

Touch control device and driving method thereof

This application relates to the technical field of electronic equipment, and in particular to a touch device and a driving method thereof.

With the development of touch technology, more and more electronic devices are equipped with touch panels. However, the 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.

In a first aspect, 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; Receiving a sensing signal through the sensing line; and Perform first signal processing on the two sensing signals received by each sensing line and corresponding to the two driving signals transmitted on the same driving line, so as to remove or attenuate the sensing received by each sensing line. The original noise signal contained in the measured signal.

In a second aspect, 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; Receiving a sensing signal through the sensing line; and Perform first signal processing on the two sensing signals received by each sensing line and corresponding to the two driving signals transmitted on the same driving line, so as to remove or attenuate the sensing received by each sensing line. The noise signal contained in the measured signal.

In a third aspect, 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 circuits arranged in a row direction and a plurality of groups of sensors arranged in a column direction.测线。 Measurement 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 second sensing line of the two driving lines. The driving method includes: In one scanning period, simultaneously inputting drive signals of equal amplitude and opposite phase to the first drive line and the second drive line included in the same group of drive lines; 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; Signal processing on the detected transmission signal to obtain a single noise signal contained in the transmission signal; and The single noise signal is used to cancel or attenuate the original noise signal contained in the sensing signal received by each sensing line.

In a fourth aspect, 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, 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 second sensing line of the two driving lines. The touch drive IC is used for: In one scanning period, simultaneously inputting drive signals of equal amplitude and opposite phase to the first drive line and the second drive line included in the same group of drive lines; 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; Signal processing on the detected transmission signal to obtain a single noise signal contained in the transmission signal; and The single noise signal is used to cancel or attenuate the original noise signal contained in the sensing signal received by each sensing line.

In a fifth aspect, the present application provides a method for driving a touch device, including: Input two drive signals with equal amplitude and opposite phase to the drive circuit; Obtain the sensing signal through the sensing line; and 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 of the same amplitude and opposite phase to the same driving circuit in one scan period. Drive signals, and perform signal processing on the two sensing signals received by each sensing circuit corresponding to the two driving signals transmitted on the same drive circuit, so as to effectively remove or attenuate the received by each sensing circuit The original noise signal contained in the 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 transmit 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 , And then use the obtained single noise signal to cancel or attenuate 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 all 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.

The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of them. Based on the implementations in this application, all other implementations obtained by those with ordinary knowledge in the technical field without creative work are within the protection scope of this application.

Please refer to FIG. 1, which is a schematic structural diagram of a touch device 100 provided by an embodiment of the application. In this embodiment, the touch device 100 can be applied to electronic products with touch display functions such as smart phones, tablet computers, and e-book readers.

As shown in FIG. 1, 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 driver IC") 32. Wherein, the touch panel 21 is disposed on the display panel 31, and the touch panel 21 is used to sense a user's touch and obtain coordinate information of the area where the user's touch is sensed. The display panel 31 Used to display text or images.

As shown in FIG. 2, 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, respectively, 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.

In this embodiment, the touch panel 21 can be various sensing types, such as self-capacitance, mutual capacitance, electromagnetic induction, or resistive touch panels. For ease of description, the embodiments of the inventive concept will be described below based on a mutual capacitance type touch panel. In addition, in order to better understand the inventive concept of the present application, 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.

As shown in 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 this 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. For example, as shown in FIG. 2, 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 line Tx2 and the second sensing line Rx2 returns 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. Therefore, the touch drive IC 22 can sense the change in the touch signal, that is, sense the user's touch.

For ease of description, 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. For example, FIG. 3 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. It can be understood that the arrangement of the driving lines Tx1~Tx4 and the sensing lines Rx1~Rx4 may not be limited to the configurations shown in FIGS. 2 and 3, and the driving lines Tx1~Tx4 and the sensing lines Rx1~ Rx4 can also be set in other ways.

Please refer to FIG. 1 again. 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 can 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. Wherein, 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, and an electrowetting display panel.

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 control signals (for example, vertical synchronization) from an external device (for example, a timing controller). Signal and level synchronization signal) to control the voltage of the gate line GL and the data line DL.

When the display driving IC 32 supplies signals to the data line DL or the gate line GL connected to the display panel 31, or operates the display panel 31, noise may be generated on the display panel 31. It is understandable that 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. Wherein, the noise signal may be an irregular voltage signal.

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, because the touch panel 21 is coupled with noise. As a result, the touch driver IC 22 cannot accurately detect the user's touch.

In this embodiment, 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 sensor The signal received by the measuring line Rx is called the "sensing signal".

In order to better understand the inventive concept of the present application, the transmission of the noise signal on the display panel 31 will be briefly introduced below in conjunction with FIG. 4. It should be noted that, in order to simplify the description, components unnecessary to describe the noise signal are omitted in FIG. 4.

As shown in FIG. 4, 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.

When a noise signal Vn is generated on the display panel 31, 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. The control panel 21 is transmitted to the touch drive IC 22.

For example, 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. In this way, 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 Rx1 The noise signal Vn is superimposed on the signal 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.

In order to improve the reliability of the touch sensing operation, how to eliminate the noise signal in the sensing signal will be described in detail below.

In the first embodiment, 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 scanning period.

For example, in one scanning period, the touch drive IC 22 respectively 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.

In the first embodiment, the touch drive IC 22 is used to continuously input two drive signals of equal amplitude and opposite phase to the same drive circuit in one scan period.

In the first embodiment, the touch drive IC 22 also receives a sensing signal through the sensing line Rx. Wherein, the sensing signals received by each of the sensing lines Rx include a touch signal and an original noise signal, and among the two sensing signals received through the same sensing line Rx The two touch signals contained have opposite phases.

For a certain sensing line Rxn, it can be seen in conjunction with Figures 2 and 4 that 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.

As shown in FIG. 5, if 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. As shown in FIG. 6, if 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, where 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. 7, when the touch drive IC 22 respectively inputs two drive signals to the same drive line Tx, and one of the drive signals is an AC signal TS, and the other drive signal is an AC signal -TS, 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 circuit Rx. Wherein, in the first embodiment, the first signal processing is to subtract the two sensing signals received by each of the sensing lines.

As shown in FIG. 7, since the two touch signals received by the same sensing line Rx have opposite phases, subtracting the two touch signals will not cancel each other out, but obtain twice the touch signal.

As shown in FIG. 8, when the sensing signal includes the noise signal Vn, for the same sensing line Rx, the sensing signal sensed for the first time includes the touch signal TS and the noise signal Vn. , The sensing signal sensed for the second time includes touch signal -TS and noise signal Vn. Since the phase of the noise signal Vn sensed twice is the same, when the two received sense signals are subtracted, the noise signal Vn in the two sense signals will cancel each other out, and twice the touch signal will be obtained. .

In an embodiment, the touch driver IC 22 may include a first signal processing module (not shown), and the first signal processing module is used to perform processing on the two signals received by each of the sensing lines Rx. The first signal processing is performed on a sensing signal. Wherein, the function of the first signal processing module can be implemented by a subtractor.

In the first embodiment, 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. As described above, since twice the touch signal is obtained after the first signal processing, in the first embodiment, the second signal processing is to perform multiple conversion on the signal obtained after the first signal processing.

In an embodiment, as shown in FIG. 9, the touch driver IC 22 may further include a second signal processing module 222, and the second signal processing module 222 is configured to perform processing on the signal obtained after the first signal processing The second signal processing is to obtain a single touch signal received by the sensing circuit.

Specifically, the function of the second signal processing module 222 can be implemented by an inverse adder A1. The inverting 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.

As shown in FIG. 9, the double 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.

In Fig. 9, it can be seen from the concept of “virtual short” that the voltages U- and U+ of the two input terminals of the reverse adder A1 are equal, namely: U- = U+ = 0 (1)

According to the concept of "virtual break" and Kirchhoff's law, the current through resistor R1 is equal to the current through resistor R2, so: ((-2TS)- U-)/R1=(U--Uo1)/R2 (2) Wherein, Uo1 is the voltage output from the output terminal of the reverse adder A1.

In the first embodiment, the relationship between the resistance values of the resistors R1 and R2 is: R1=2R2. Combining the above two formulas (1) and (2), it can be seen that the reverse adder A1 The voltage Uo1 output by the output terminal is: Uo1=TS, that is, the signal output by the reverse adder A1 is equal to the single touch signal TS received by the sensing line Rx.

It is understandable that when the touch driver IC 22 controls the plurality of sensing circuits Rx to receive touch signals at the same time to sense a user's touch, the touch driver IC may include the same method as the plurality of sensing circuits. Rx one-to-one correspondence of a plurality of the first signal processing modules and a plurality of the second signal processing modules 222, the plurality of first signal processing modules and a plurality of the second signal processing modules 222 They are respectively used to perform the first signal processing and the second signal processing on the sensing signal received by the corresponding sensing line Rx. 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, the first signal processing module and the second signal processing module 222 are used to receive multiple sensing lines Rx The received sensing signal is sequentially subjected to the first signal processing and the second signal processing.

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 scan period, and Signal processing is performed on the two sensing signals received by each sensing line corresponding to the two driving signals transmitted on the same driving line to effectively remove or attenuate the sensing signals received by each sensing line The original noise signal contained in the sensor and obtain a single 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 The reliability of the test operation.

Please refer to FIG. 10, which is a schematic diagram of the configuration structure of the driving circuit and the sensing circuit of the touch panel 21 provided by the second embodiment of the application. As shown in FIG. 10, in the second embodiment, 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. Wherein, each group of the driving lines Tx includes a first driving line and a second driving line, and 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 each The second sensing line of the second driving line of the group driving line Rx.

For ease of description, FIG. 10 shows 2 groups of driving lines Tx1 to Tx2 and 4 groups 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, and the sensing line Rx3 includes a first sensing line Rx31 and a second sensing line Rx32. , The sensing line Rx4 includes a first sensing line Rx41 and a second sensing line Rx42. It is understandable 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.

In the second embodiment, each first driving line and each second driving line are alternately arranged in the row direction of the touch panel 21. In this way, each first driving line is arranged in odd rows/even rows, each second driving line is arranged in even rows/odd rows, and each first sensing line is located in the odd row/even row in the column direction where it is located. Each first driving line corresponds to each second sensing line corresponding to each second driving line located in the even row/odd row in the column direction where it is located.

In the second embodiment, 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.

For example, as shown in FIG. 11, in one scanning period, 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.

In the second embodiment, 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.

In the second embodiment, the sensing signal received by each sensing line includes a touch signal and an original noise signal. Wherein, for a certain sensing line Rxij, it corresponds to a certain driving line Txkj that transmits the driving signal, and the touch signal passes through the driving line Txkj and is set between the driving line Txkj and the sensing line Rxij. The inter-capacitor is transmitted to the sensing line Rxij, and finally to the touch driving IC 22. The original noise signal is directly transmitted from the touch panel 21 to the sensing line Rxij, and is transmitted to the touch driving IC 22 through the sensing line Rxij.

It is understandable that after the noise signal Vn is coupled to the touch panel 21, 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 wiring is transmitted to the touch drive IC 22.

For example, as shown in FIG. 12, 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 will become another transmission path of the noise signal Vn, that is, the third path P3. In this way, 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. At the same time, the noise signal Vn can also be transmitted to the touch drive IC 22 along the third path P3, so that the drive signal transmitted by the drive line Tx11 and the touch panel 21 can be detected through the drive line Tx11. The sum of noise signals transmitted to the drive line Tx11.

In the second embodiment, 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. Specifically, in the second embodiment, 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 control panel 21 is the sum of the noise signals transmitted 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 The sum of the original noise signals of the second drive line.

In the second embodiment, the touch driver 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.

In an embodiment, as shown in FIG. 11 and FIG. 13, the touch driver 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.

Specifically, 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 sum of two noise signals included in the transmission signal. Wherein, the driving signals included in the transmission signal are mutually cancelled when the inverse adder A2 performs the addition operation.

For example, as shown in FIG. 11, 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.

Wherein, the voltage of the detection terminal D11 is TS+Vn, and the voltage of the detection terminal D12 is -TS+Vn. Combining the calculation principle of the voltage at the output terminal of the reverse adder A1 that has been described in detail above, it can be seen that The voltage at the output terminal of the reverse adder A2 is -2Vn.

In the one embodiment, the third signal processing module 223 further includes a reverse adder A3, and the reverse adder A3 is used to add the sum of the two noise signals, To obtain a single noise signal contained in the transmission signal.

For example, as shown in FIG. 11, 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 relationship between the resistance values of the resistors R4 and R5 is: R4=2R5. In combination with the calculation principle of the voltage at the output terminal of the reverse adder A1 that has been described in detail above, it can be known that the output signal of the output terminal of the reverse adder A3 is Vn.

In the second embodiment, the touch driver IC 22 is also used to use the single noise signal to cancel or attenuate the original noise signal contained in the sensing signal received by each sensing line.

In an embodiment, as shown in FIGS. 11 and 13, 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 processing The 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 receiving the touch signal.

Specifically, the function of the fourth signal processing module 224 can be implemented by a difference calculator 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.

For example, as shown in FIG. 11, 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 output by the inverted adder A3 Vn 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 differential The non-inverting input terminal-of the arithmetic unit A4, and the non-inverting input terminal + of the differential arithmetic unit A4 are also grounded through a resistor R9.

In Fig. 11, it can be seen from the concept of “virtual short” that the voltages U- and U+ of the two input terminals of the differential arithmetic unit A4 are equal, namely: U- = U+ (3) U- = U+ (3)

According to the concept of "virtual break" and Kirchhoff's law, the current through resistor R6 is equal to the current through resistor R7, and the current through resistor R8 is equal to the current through resistor R9, so: (Vn-U-)/R6=(U--Uo4)/R7 (4) ((TS+Vn)-U+)/R8=U+/R9 (5) Among them, Uo4 is the voltage output by the output terminal of the differential arithmetic unit A4.

In the second embodiment, the resistances of the resistors R6, R7, R8, and R9 are equal. Combining the above three formulas (3) to (5), it can be seen that the output of the differential operator A4 The voltage Uo4 is: Uo4=TS, and the signal output by the differential operator A4 is equal to the touch signal TS received by the corresponding sensing line.

For ease of description, 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 amplitude values to two drive lines included in the same group of drive lines within 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 , And then use the obtained single noise signal to cancel or attenuate 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 all 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.

Please refer to FIG. 14, which 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.

In 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 scan period.

For example, in one scanning period, the touch drive IC 22 respectively 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.

In the first embodiment, 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.

Wherein, the sensing signals received by each of the sensing lines Rx include a touch signal and an original noise signal, and among the two sensing signals received through the same sensing line Rx The two touch signals contained have opposite phases.

For a certain sensing line Rxn, 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. On 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 line and corresponding to the two driving signals transmitted on the same driving line, so as to remove or attenuate each of the two sensing signals. The original noise signal contained in the sensing signal received by the sensing circuit.

Wherein, in the first embodiment, 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 phases of the two noise signals Similarly, 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.

As described above, since twice the touch signal is obtained after the first signal processing, in the first embodiment, the second signal processing is to perform multiple conversion on the signal obtained after the first signal processing.

Specifically, in the first embodiment, the second signal processing is to use a reverse 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 one scanning period, The two sensing signals received by the sensing circuit corresponding to the two driving signals transmitted on the same driving circuit undergo signal processing to effectively remove or attenuate the sensing signals received by each sensing circuit. The original noise signal is obtained, 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 signals, thereby improving the performance of the touch sensing operation. reliability.

Please refer to FIG. 15, which is a flowchart of a method for driving a touch device according to a second embodiment of the present application. The driving method is used to drive and control the touch device provided by the second embodiment. As shown in FIG. 15, the driving method includes the following steps.

Step 1501: The touch drive IC 22 simultaneously inputs drive signals with the same amplitude and opposite phase to the first drive line and the second drive line included in the same group of drive 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.

In the second embodiment, the sensing signal received by each sensing line includes a touch signal and an original noise signal. Wherein, for a certain sensing line Rxij, it corresponds to a certain driving line Txkj that transmits the driving signal, and the touch signal passes through the driving line Txkj and is set between the driving line Txkj and the sensing line Rxij. The inter-capacitor is transmitted to the sensing line Rxij, and finally to the touch driving IC 22. The original noise signal is directly transmitted from the touch panel 21 to the sensing line Rxij, and is transmitted to the touch driving IC 22 through the sensing line Rxij.

In the second embodiment, 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. Specifically, in the second embodiment, 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 control panel 21 is the sum of the noise signals transmitted 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 The sum of the original noise signals of the second drive line.

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.

In an embodiment, the step 1503 includes:

Using a first reverse adder to add the detected transmission signal to obtain the sum of the two noise signals contained in the transmission signal; and

A second reverse 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.

In an embodiment, 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. 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 , And then use the obtained single noise signal to cancel or attenuate 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 all 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.

Please refer to FIG. 16, which 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 with 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.

In one embodiment, 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.

Specifically, 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.

Further, 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 circuit through a sensing circuit, wherein each of the sensing signals includes a touch signal and the original noise 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 attenuate the original noise signal.

Further, after the 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.

In the driving method provided in the one embodiment, two driving signals of equal amplitude and opposite phase are respectively input to the same driving circuit within a scanning period, and the received signals of each sensing circuit correspond to 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 A 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.

In another embodiment, 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.

Specifically, 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.

After the step 1601, the method may further include: obtaining a noise signal through a driving circuit that transmits the driving signal.

Further, obtaining the noise signal through the driving circuit for transmitting the driving signal may include:

Acquiring the original noise signal and the corresponding driving signal transmitted by the touch panel from the two driving lines that send the driving signal;

Processing the signals obtained from the two drive lines by the touch drive IC to remove the drive signal contained in the obtained signals and output a double noise signal; and

The output double noise signal is restored to a single noise signal through the touch drive IC.

Wherein, the sensing signal includes a touch signal and the original noise signal.

Further, 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 obtained by each sensing line. The touch signal contained in the test signal.

In the driving method provided in the another embodiment, in one scanning period, driving signals of equal amplitude and opposite phase are simultaneously input to two adjacent driving lines. While receiving the sensing signal through the sensing circuit, the noise signal is acquired through the driving circuit that transmits the driving signal, and then the acquired noise signal is used to cancel or attenuate the noise received by each sensing circuit The original noise signal contained in the sensing signal is used to obtain the touch signal received by each sensing circuit, so that the touch driver IC 22 can perform accurate touch sensing operations according to the received sensing signal, thereby improving Reliability of touch sensing operation.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application and not to limit them. Although the application has been described in detail with reference to the above preferred embodiments, those with ordinary knowledge in the technical field should understand that they can understand the application Modifications or equivalent replacements of the technical solutions of the application should not depart from the spirit and scope of the technical solutions of this application.

100: Touch device 21: Touch panel 22: Touch driver IC 222: The second signal processing module 223: The third signal processing module 224: The fourth signal processing module 31: display panel 32: Display driver IC Tx, Tx1~Tx4, Tx11, Tx12, Tx21, Tx22: drive line Rx, Rx1~Rx4, Rx11, Rx12, Rx21, Rx22, Rx31, Rx32, Rx41, Rx42: sensing circuit GL: gate line DL: Data cable P1: first path P2: second path P3: third path Cm: mutual capacitor Cr, Cr1, Cr2: parasitic capacitor D1: First direction D2: second direction R1~R9: resistance A1, A2, A3: Reverse addition operator A4: Differential arithmetic unit

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are merely the present For some implementations of the application, for those with ordinary knowledge in the technical field, other schemas can be obtained based on these schemas without creative work.

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 the touch sensing operation of the touch panel and the touch drive IC of the 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 the transmission path of the 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.

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 method for driving a touch device according to the first embodiment of the application.

FIG. 15 is a flowchart of a driving method of a touch device provided by the second embodiment of this application.

FIG. 16 is a flowchart of a method for driving a touch device according to a second embodiment of the application.

1601~1603: steps

Claims (34)

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, wherein the driving method includes: Two driving signals with equal amplitude and opposite phase are input to the same driving circuit in one scanning period; Receiving a sensing signal through the sensing line; and Perform first signal processing on the two sensing signals received by each sensing line and corresponding to the two driving signals transmitted on the same driving line, so as to remove or attenuate the sensing received by each sensing line. The original noise signal contained in the measured signal. The driving method described in item 1 of the scope of patent application, wherein, respectively inputting two driving signals of equal amplitude and opposite phase to the same driving circuit in one scanning period includes: supplying the same driving circuit to the same driving circuit in one scanning period. Continuously input two drive signals with equal amplitude and opposite phase. The driving method according to item 1 or 2 of the scope of patent application, wherein the sensing signal received by each of the sensing lines includes a touch signal and the original noise signal, and passes through the same The two touch signals contained in the two sensing signals received by the sensing circuit have opposite phases. According to the driving method described in item 3 of the scope of patent application, the first signal processing is to subtract the two sensing signals received by each of the sensing lines. The driving method according to item 4 of the scope of patent application, wherein the driving method further includes: The second signal processing is performed on the signal obtained after the first signal processing to obtain a single touch signal received by each of the sensing lines. According to the driving method described in item 5 of the scope of patent application, the second signal processing is to use an inverse adder to add the signal obtained after the first signal processing to obtain the sensing line A single touch signal received by the channel. A touch device includes a touch panel and a touch drive IC. The touch panel is provided with multiple drive lines and multiple sensing lines. 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; Receiving a sensing signal through the sensing line; and Perform first signal processing on the two sensing signals received by each sensing line and corresponding to the two driving signals transmitted on the same driving line, so as to remove or attenuate the sensing received by each sensing line. The noise signal contained in the measured signal. According to the touch device described in item 7 of the scope of patent application, the touch drive IC continuously inputs two drive signals of equal amplitude and opposite phase to the same drive circuit in one scan period. The touch device according to item 7 or 8 of the scope of patent application, wherein the sensing signal received by each of the sensing lines includes a touch signal and the noise signal, and passes through the same The two touch signals contained in the two sensing signals received by the sensing circuit have opposite phases. The touch device according to claim 9 of the scope of patent application, wherein the first signal processing is to subtract the two sensing signals received by each of the sensing lines. For the touch device described in item 10 of the scope of patent application, the touch driver IC is also used to perform second signal processing on the signal obtained after the first signal processing, so as to obtain the receiving of each of the sensing lines To the single touch signal. The touch device according to item 11 of the scope of patent application, wherein the touch drive IC includes a reverse adder, and the reverse adder is used to add a signal obtained after the first signal processing Calculation to obtain a single touch signal received by the sensing circuit. A method for driving a touch device, the touch device includes a touch panel, the touch panel includes a plurality of groups of driving circuits arranged in a row direction and a plurality of groups of sensing circuits arranged in a column direction, wherein each group The driving lines include 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 second driving line corresponding to each group of driving lines The second sensing line of the line, the driving method includes: In one scanning period, simultaneously inputting drive signals of equal amplitude and opposite phase to the first drive line and the second drive line included in the same group of drive lines; 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; Signal processing on the detected transmission signal to obtain a single noise signal contained in the transmission signal; and The single noise signal is used to cancel or attenuate the original noise signal contained in the sensing signal received by each sensing line. According to the driving method described in claim 13, wherein the sensing signal received by each of the sensing lines includes a touch signal and the original noise signal. The driving method according to item 13 or 14 of the scope of patent application, wherein the transmission signal includes: A first transmission signal, which is the sum of the driving signal transmitted by the corresponding first driving line and the noise signal transmitted by the touch panel to the corresponding first driving line; and The second transmission signal is the sum of the driving signal transmitted by the corresponding second driving line and the noise signal transmitted by the touch panel to the corresponding second driving line. The driving method according to item 15 of the scope of patent application, wherein the signal processing on the detected transmission signal to obtain a single noise signal contained in the transmission signal includes: Using a first reverse adder to add the detected transmission signal to obtain the sum of the two noise signals contained in the transmission signal; and A second reverse adder is used to add the sum of the two noise signals to obtain a single noise signal contained in the transmission signal. The driving method according to item 16 of the scope of patent application, wherein the use of the single noise signal to respectively cancel or attenuate the original noise signal contained in the sensing signal received by each sensing line 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. According to the driving method described in claim 13, wherein each of the first driving lines and each of the second driving lines are alternately arranged in the row direction of the touch panel. A touch device includes a touch panel and a touch drive IC. The touch panel includes multiple sets of drive circuits arranged in the row direction and multiple sets of sensing circuits arranged in the column direction, wherein each set of the drive circuits Including 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 second driving line corresponding to the second driving line of each group of driving lines Sensing line, the touch drive IC is used for: In one scanning period, simultaneously inputting drive signals of equal amplitude and opposite phase to the first drive line and the second drive line included in the same group of drive lines; 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; Signal processing on the detected transmission signal to obtain a single noise signal contained in the transmission signal; and The single noise signal is used to cancel or attenuate the original noise signal contained in the sensing signal received by each sensing line. The touch device according to item 19 of the scope of patent application, wherein the sensing signal received by each of the sensing lines includes a touch signal and the original noise signal. The touch device according to item 19 or 20 of the scope of patent application, wherein the transmission signal includes: A first transmission signal, which is the sum of the driving signal transmitted by the corresponding first driving line and the noise signal transmitted by the touch panel to the corresponding first driving line; and The second transmission signal is the sum of the driving signal transmitted by the corresponding second driving line and the noise signal transmitted by the touch panel to the corresponding second driving line. The touch device according to item 21 of the scope of patent application, wherein the touch driver IC includes a plurality of signal processing modules corresponding to a plurality of groups of the driving circuits, and each of the signal processing modules includes: The first reverse adder is configured to add the transmission signal detected on the corresponding drive line to obtain the sum of the two noise signals contained in the transmission signal; and The second reverse adder is used to add the sum of the two noise signals to obtain a single noise signal contained in the transmission signal. The touch device according to item 22 of the scope of patent application, wherein the touch drive IC further includes a plurality of differential operators corresponding to the plurality of sensing lines one-to-one, and each of the differential operators is used to The sensing signal received by the sensing line and the single noise signal are subjected to a differential operation to obtain the touch signal received by the corresponding sensing line. The touch device according to the 19th patent application, wherein each of the first drive lines and each of the second drive lines are alternately arranged in the row direction of the touch panel. A driving method of a touch device includes: Input two drive signals with equal amplitude and opposite phase to the drive circuit; Obtain the sensing signal through the sensing line; and The original noise signal contained in the sensing signal is removed or attenuated by the touch drive IC. According to the driving method described in item 25 of the scope of patent application, the driving method further includes: obtaining a noise signal through a driving circuit that transmits the driving signal. The driving method described in item 26 of the scope of patent application, wherein the input of two driving signals of equal amplitude and opposite phase to the driving circuit includes: In a scanning period, two adjacent drive lines are simultaneously inputted with two drive signals of equal amplitude and opposite phase. The driving method according to item 27 of the scope of patent application, wherein, obtaining a noise signal through a driving circuit that transmits the driving signal includes: Acquiring the original noise signal and the corresponding driving signal transmitted by the touch panel from the two driving lines that send the driving signal; Processing the signals obtained from the two drive lines by the touch drive IC to remove the drive signal contained in the obtained signals and output a double noise signal; and The output double noise signal is restored to a single noise signal through the touch drive IC. The driving method according to claim 28, wherein the sensing signal includes a touch signal and the original noise signal, and the original noise signal contained in the sensing signal is removed by the touch driver IC Or attenuation includes: The touch driving IC cancels the single noise signal and the original noise signal in the sensing signal to obtain the touch signal contained in the sensing signal acquired by each sensing circuit. As the driving method described in item 25 of the scope of patent application, the input of two driving signals with equal amplitude and opposite phase to the driving circuit includes: Two driving signals of equal amplitude and opposite phase are input to the same driving circuit in one scanning period. As the driving method described in item 30 of the scope of patent application, the inputting of two driving signals of equal amplitude and opposite phase to the same driving circuit in one scanning period includes: Two driving signals of equal amplitude and opposite phase are continuously input to the same driving circuit in one scanning period. The driving method according to item 30 or 31 of the scope of patent application, wherein, obtaining a sensing signal through a sensing circuit includes: Two sensing signals corresponding to the two driving signals transmitted on the same driving circuit are respectively acquired through the sensing circuit, wherein each of the sensing signals includes the touch signal and the original noise signal, and passes through the same all The two touch signals contained in the two sensing signals acquired by the sensing circuit have opposite phases. The driving method according to item 32 of the scope of patent application, wherein the original noise signal contained in the sensing signal is removed or attenuated by the touch driving IC, including: Subtracting the two sensing signals acquired by the same sensing circuit by the touch drive IC removes or reduces the original noise signal. The driving method according to item 33 of the scope of patent application, wherein, after removing or reducing the noise signal, the driving method further includes the steps: The subtracted two sensing signals are restored into a single touch signal to obtain a single touch signal received by each sensing line.

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