TWI521416B - Touch display capable of reducing interference signal of capacitive touchpad - Google Patents

Description

Touch display capable of reducing interference signal of capacitive touch controller

The present invention generally relates to a display, and more particularly to a touch display that reduces interference signals from a capacitive touch sensor.

Capacitive touch sensors are often paired with displays to provide the user with the ability to operate the display. A capacitive touch control integrated circuit (IC) transmits a signal to a capacitive touch sensor via a transmitting electrode. When a finger or stylus approaches a capacitive touch controller, it affects the signal and causes the signal to change in voltage, frequency, phase, and the like. The capacitive touch IC will receive the signal of the change to identify the touch position of the finger or the stylus. The identification capability of the sensing signal is closely related to the ratio of the received sensing signal to the noise signal. If the noise is effectively reduced or the intensity of the sensing signal is increased, the sensing performance of the touch can be improved. The general noise comes from the voltage source noise of the touch control IC, the ambient electromagnetic noise, and the noise generated when the display is driven.

The display generally has an active control circuit (or an active component) arranged in a matrix. The scan signal is connected to the gate electrode of the active component, and the channel of the active component of one row on the display is turned on line by line to facilitate the display. The signal can be passed into the pixel electrode via the source electrode, allowing the pixels on the display to be displayed correctly. However, when the scan signal flows through the gate electrode and the driving signal flows through the source electrode, it is coupled to the capacitive touch sensor electrode due to the capacitance of the gate electrode and the source electrode and the electrode of the capacitive touch sensor, thereby becoming a capacitive type. The noise in the sensor signal affects the identification of the signal by the capacitive touch controller.

Generally, the touch control IC uses adjacent positions or adjacent frame signals to compare with the received signals to form a differential signal, thereby reducing the noise that the display is coupled into. However, since the scanning signal of the display continuously changes the signal strength over time, and the display signal will continuously change the signal intensity in position according to the display content, and the signals on the gate electrodes and the source electrodes are not consistent, After coupling, it often becomes a composite noise signal on the capacitive touch sensor electrodes. Moreover, the coupled signals tend to change in time and space, so that the coupled signal volume is constantly changing and unpredictable, and the difficulty of filtering such noise coupled from the display is increased.

The present invention is directed to providing an effective solution for reducing noise generated when a display is driven.

An object of the present invention is to provide an instant compensation sensing signal which is similar in time and intensity to the scanning signal on the gate electrode of the capacitive touch sensor coupled to the gate electrode of the display and the display signal on the source electrode. It can be used as a benchmark for filtering noise.

Another object of the present invention is to provide an electrode design method, so that the generated compensation signal can be prevented from being affected by the touch operation, and the gate electrode coupled to the display electrode on the capacitive touch sensor electrode can be more accurately determined. The noise of the upper scan signal and the display signal on the source electrode is filtered out.

Still another object of the present invention is to provide a time relationship between the determination of the compensation sensing signal and the display signal on the gate electrode of the capacitive touch sensor electrode coupled to the gate electrode of the display and the source electrode. Since the compensation sensing electrode and the upper surface of the capacitive touch sensor are different from the gate electrode and the source electrode of the display, the compensation sensing signal and the capacitive touch sensor electrode are coupled to the gate electrode and the source electrode of the display. The noise has a phase delay relationship, so that the special identifiable signal generated by the display driving or the identifiable signal provided by the display driving IC can be utilized, and the sensing electrode and the compensation sensing electrode of the capacitive touch sensor are simultaneously detected and recorded. The phase difference of the received coupled signal is used as a phase difference reference for subsequent determination and filtering to filter noise from the gate and source electrodes of the capacitive touch sensor electrode coupled to the display.

Still another object of the present invention is to provide a determination of the intensity relationship between the compensation sensing signal and the display signal on the gate electrode coupled to the gate electrode of the capacitive touch sensor electrode and the source electrode. Because the compensation sensing electrode and the upper surface of the capacitive touch sensor are different from the position and resistance of the gate electrode and the source electrode of the display, the compensation sensing signal and the gate of the capacitive touch sensor are coupled from the gate and the source of the display. The noise of the pole electrode has a difference in strength. Therefore, the special identifiable signal generated by the display driving or the identifiable signal provided by the display driving IC can be utilized, and the difference between the coupled signal intensity of each position electrode of the capacitive touch controller and the compensation sensing electrode can be detected and recorded as Subsequent determination and filtering of the phase difference or intensity difference reference to filter the noise of the capacitive touch sensor electrode coupled to the gate electrode and the source electrode of the display.

To achieve the above objective, the present invention provides a touch display including a display module and a touch module. The display module is configured to perform a display action of displaying data. The touch module is electrically connected to the display module, and compensates according to the electrical signal of the display module during the display operation to perform a touch sensing action to obtain a touch signal representing one or more touch positions. Thereby, the interference signal of the capacitive touch controller can be reduced.

In the touch display device described above, the display module includes a common electrode, a plurality of lateral scanning electrodes, a plurality of longitudinal data electrodes, and a plurality of pixel electrodes. The scan electrodes are spaced apart from the data electrodes by a vertical distance, and the pixel electrodes are disposed on at least one side of the common electrode. The touch module includes a compensation sensing electrode, a plurality of touch electrodes, and a receiver coupled to a portion of the touch electrodes. The compensation sensing electrode traverses the data electrodes and is located on at least one side of the data electrodes to form a plurality of first coupling capacitors with the data electrodes. The receiver is electrically connected to the compensation sensing electrode and receives a plurality of second coupling signals coupled from the touch electrodes And a plurality of first coupled signals from the compensation sensing electrodes and representing the first coupling capacitors, and performing operations on the first coupling signals according to the second coupling signals to obtain touch signals representing the touch positions .

Alternatively, in the touch display device described above, the display module includes a common electrode, a plurality of scan electrodes, a plurality of data electrodes, and a plurality of pixel electrodes. The scan electrodes are spaced a vertical distance from the data electrodes. These pixel electrodes are disposed on one side of the common electrode. The display module generates a compensation signal according to the plurality of electrical signals of the data electrodes. The touch module includes a plurality of touch electrodes and a receiver coupled to a portion of the touch electrodes. The receiver is electrically connected to the display module, and receives a plurality of coupled signals and compensation signals coupled from the touch electrodes, and operates according to the coupled signals and the compensation signals to obtain touches representing one or more touch positions. Control signal.

According to the present invention, the touch signal may be compensated according to the electrical signal of the display module during the display operation to obtain a touch signal representative of one or more touch positions, or the compensation sensing electrode on the display may be Providing a synchronous compensation sensing signal related to the time and intensity of the noise on the gate of the capacitive touch sensor coupled with the scanning signal on the gate of the display and the display signal on the source electrode, and according to its time and intensity In relation, the capacitive touch sensor electrode is coupled to the scan signal on the gate of the display and the noise of the display signal on the source electrode. By constructing more than one compensation sensing electrode on the display, a capacitance is formed between the compensation sensing electrode and the gate electrode and the source electrode so that the signals of the gate electrode and the source electrode can also be coupled to the compensation sensing electrode. Since the structure of the compensation sensing electrode and the gate electrode and the source electrode is similar to the structure of the electrode on the capacitive touch sensor and the gate electrode and the source electrode of the display, the coupling signal on the sensing electrode and the capacitive touch are compensated. The coupling signal on the device is similar, so that a signal related to the noise signal on the capacitive touch sensor in time and intensity can be provided as a basis for judging the touch compensation sensing signal and the display noise, and using the comparison. Circuit, instant capacitor The noise filtering or subtraction in the sensor electrode signal is used to improve the signal-to-noise ratio of the capacitive touch signal, and improve the sensing performance of the capacitive touch sensor.

In order to make the above description of the present invention more comprehensible, a preferred embodiment will be described below in detail with reference to the accompanying drawings.

Cc1‧‧‧first coupling capacitor

Cc3‧‧‧3rd coupling capacitor

S1~s7‧‧‧ display signal

Sc1‧‧‧ first coupled signal

Sc2‧‧‧Second coupled signal

Sc3‧‧‧ third coupled signal

Sc4‧‧‧First compensation signal

Sc5‧‧‧second compensation signal

Se‧‧‧ transmitting signal

Vcom‧‧‧Common voltage

1, 1'‧‧‧ touch display

10‧‧‧ display module

11‧‧‧Common electrode

12‧‧‧Scan electrode / gate electrode

13‧‧‧Data electrode/source electrode

14‧‧‧ pixel electrodes

15‧‧‧Control circuit

16‧‧‧lower substrate

16T‧‧‧ upper surface

17‧‧‧Upper substrate

17B‧‧‧ lower surface

17T‧‧‧ upper surface

18‧‧‧gate driver

19‧‧‧Data Drive

20‧‧‧First compensation induction electrode

25‧‧‧Second compensation induction electrode

30‧‧‧Touch Module

31, 32‧‧‧ touch electrodes

33‧‧‧ Receiver

34‧‧‧transmitter

35‧‧‧Touch substrate

1 shows a schematic diagram of a touch display in accordance with a preferred embodiment of the present invention.

2A is a diagram showing an example of a capacitive coupling condition of a touch display in accordance with a preferred embodiment of the present invention.

2B to 2D show a plurality of modifications of Fig. 2A.

3A and 3B are diagrams showing a manner of reducing interference signals of a capacitive touch controller according to a preferred embodiment of the present invention.

4 is a schematic diagram of a touch display according to another embodiment of the present invention.

FIG. 5 shows a schematic diagram of a first compensation sensing electrode in accordance with yet another embodiment of the present invention.

1 shows a schematic diagram of a touch display 1 in accordance with a preferred embodiment of the present invention. 2A is a diagram showing an example of a capacitive coupling state of the touch display 1 in accordance with a preferred embodiment of the present invention. As shown in FIG. 1 and FIG. 2A, the touch display 1 of the present embodiment for reducing the interference signal of the capacitive touch sensor includes a display module 10 and a touch module 30. The display module 10 is configured to perform a display operation of displaying data. The touch module 30 is electrically connected to the display module 10 and compensated according to the electrical signal of the display module 10 during the display operation to perform a touch sensing action to obtain one touch representing one or more touch positions. signal. Thereby, the interference signal of the capacitive touch controller can be reduced or eliminated.

The display module 10 includes a common electrode 11 and a plurality of lateral scanning electrodes (also called a gate electrode 12, a plurality of longitudinal data electrodes (also referred to as source electrodes) 13 and a plurality of pixel electrodes 14, the common electrode 11 may be in the form of a single electrode, or may be a plurality of common electrode blocks The type exists. These scan electrodes 12 are spaced a vertical distance from these data electrodes 13 (shown in more detail in Figure 3A). The scan electrode 12 is electrically connected to a gate driver 18, and the data electrode 13 is connected to a data driver 19. The driving principle of the gate driver 18 and the data driver 19 can be easily understood by those skilled in the art, and thus will not be described herein.

The pixel electrodes 14 are disposed on at least one side of the common electrode 11, wherein the "one side" includes, but is not limited to, the upper side, the lower side, the left side, the right side, the front side, or the rear side, and the display modules (displays) are viewed from each other. Depending on the type and design, at least one side means one or both sides. For example, the pixel electrode 14 of FIG. 2A is below the common electrode 11; if it is an In-Plane Switching (IPS) liquid crystal display (LCD) display, the pixel electrode and the common electrode are It is arranged on the left and right; if it is a display of a Fringe Field Switching (FFS) LCD, the pixel electrodes 14 may be above and/or below, to the left and/or to the right of the common electrode 11.

The touch module 30 includes a first compensation sensing electrode 20, a plurality of touch electrodes 31, 32, and a receiver coupled to a portion of the touch electrodes 31, 32 (in this embodiment, the touch electrode 32). 33. The first compensation sensing electrode 20 traverses the data electrode 13 and is located on at least one side (ie, one side, two sides, three sides, four sides, etc.) of the data electrodes 13 to form a plurality of data electrodes 13 The first coupling capacitor Cc1. The first compensation sensing electrode 20 may be perpendicular to the data electrode 13 or may not be perpendicular to the data electrode 13 in a plan view.

The receiver 33 is electrically connected to the first compensation sensing electrode 20, and receives a plurality of second coupling signals Sc2 coupled from the touch electrodes 31, 32, and from the first compensation sensing electrode 20 and represents the first coupling capacitors. a plurality of first coupled signals Sc1 of Cc1, and are operated according to the second coupled signals Sc2 and the first coupled signals Sc1 to obtain a representative touch position The touch signal is used to reduce or eliminate noise from the display module 10. Therefore, a processor can be included in the receiver 33.

In an example, the same first coupled signal Sc1 over the same sensing period is subtracted from the plurality of second coupled signals Sc2. However, in another example, the driving frequency of the display module and the touch module may be different, so it is also possible that a plurality of first coupled signals become a noise signal after being accumulated or converted, and then with the same period. The two coupled signals are operated. In general, the coupled signal is converted to a digital signal by analog/digital (A/D). The signal processing method can calculate the charge or voltage intensity before the A/D conversion (simplely, subtraction), or The digital signal is calculated after A/D. In addition, because the capability of the touch IC is different, sometimes only a part of the sensing electrode signals are received at the same time, so the second coupling signal Sc2 of this part may be operated only with the first coupling signal Sc1 of the period.

As shown in FIGS. 2A and 1, the display module 10 includes a lower substrate 16 and an upper substrate 17. Of course, the display module 10 can further include a touch substrate 35 and a transmitter 34 (FIG. 1). In another example, the common electrode, the scan electrode, and/or the data electrode may also have the function of a touch electrode. Since FIG. 2A only shows the capacitive coupling condition, the positional relationship with respect to the vertical direction of the scan electrode 12, the data electrode 13 and the pixel electrode 14 is not drawn in detail, and those skilled in the art can easily understand the vertical direction. How the location relationship is configured, and will not be described here.

The common electrode 11 is formed on one of the lower surface 17B of the upper substrate 17 or the upper surface 16T of the lower substrate 16 and faces the lower substrate 16. In other embodiments, such as an embodiment of a display such as an IPS LCD, an FFS LCD, an Organic Electroluminescence Display (OLED), or an Electro-Phoretic Display (EPD), the common electrode may be on the upper substrate. The lower surface may also be on the upper surface of the lower substrate.

The scan electrodes 12, the data electrodes 13 and the pixel electrodes 14 It is formed on one upper surface 16T of the lower substrate 16. The common electrode 11 is formed on one of the lower surface 17B of the upper substrate 17 or the upper surface 16T of the lower substrate 16 and faces the lower substrate 16. The touch electrodes 31 and 32 are formed on the touch substrate 35. The emitters 34 are connected to the touch electrodes 31 and 32 for emitting a transmission signal Se to the touch electrodes 31 and 32 to generate the second coupling signals Sc2.

It is noted that the touch module shown in FIG. 2A is applicable to a mutual-capacitive touch structure in which an emission signal Se is emitted by one electrode (for example, 31) and a transmission signal Se is received by another electrode (such as 32); But it is also applicable to a self-contained touch structure in which a transmitting signal is transmitted and received by the same electrode. The transmitter 34 is a control circuit (IC) that generates a transmission signal, and the receiver 33 is a reception circuit (IC) that receives the second coupling signal Sc2 and the first coupling signal Sc1. In another embodiment, the touch module is a self-capacitive touch structure, and each electrode is responsible for transmitting and receiving the transmission signal Se (that is, the receiver 33 has the function of transmitting and receiving signals), and the constant is Both types of touch modules operate with the second coupled signal Sc2 of the same time period and the first coupled signal Sc1 (or the noise signal) of the same period.

It should be noted that FIG. 2A shows the principle of coupling the signal electrode 13 and the scan electrode 12 to the common voltage Vcom of the common electrode 11 and then coupling it to the capacitive touch substrate 35. Because there is a glitch (signal) on the scan electrode 12 and the data electrode 13, and a certain overlap area with Vcom forms a capacitance, the glitch is coupled to Vcom, and is also recoupled from Vcom to the touch substrate. The electrodes become noise.

2B to 2D show a modification of Fig. 2A. As shown in FIG. 2B, the touch electrodes 31, 32 are formed on one of the upper surfaces 17T of the upper substrate 17. In other variations, the touch electrodes 31, 32 may be formed on the lower surface 17B of the upper substrate 17. Alternatively, it is also possible that the two electrodes are respectively disposed on: (1) an upper surface of the upper substrate and a lower surface of the upper substrate; (2) an upper surface of the upper substrate and an upper surface of the lower substrate; and (3) a lower substrate The upper surface is shared with the electrodes of the display.

For example, as shown in FIG. 2C, the touch electrodes 31, 32 are respectively formed on the upper surface 17B of the upper substrate 17 and the upper surface 17T of the upper substrate 17. As shown in FIG. 2D, the touch electrodes 31, 32 are formed on the upper surface 16T of the lower substrate 16 and the lower surface 17B of the upper substrate 17, respectively.

In the above embodiment, the second coupling signals Sc2 are generated by the touch electrodes 31 and 32, and the touch electrodes 31 and 32 are achieved by a technique using single-sided ITO (SITO). However, in other embodiments, such as double-sided ITO (DITO) technology, the second coupling signal Sc2 can also be used to touch the electrodes 31, 32 and an object (such as a finger or a stylus). )produce.

In the above embodiment, the emitter electrode of the touch module may be on at least one side of the receiving electrode.

Referring back to FIG. 1 , the touch module 30 of the touch display 1 of the present embodiment further includes a second compensation sensing electrode 25 traversing the scanning electrodes 12 and located on at least one side of the scanning electrodes 12 to A plurality of third coupling capacitors Cc3 are formed with the scan electrodes 12. In this case, the receiver 33 is electrically connected to the second compensation sensing electrode 25, and receives a plurality of second coupling signals Sc2 coupled from the touch electrodes 31, 32, and from the second compensation sensing electrode 25 and represents this And a plurality of third coupling signals Sc3 of the third coupling capacitor Cc3, and according to the second coupling signal Sc2 and the first coupling signal Sc1 and the third coupling signal Sc3 to obtain a touch representing the touch position Control signal.

It should be noted that the first compensation sensing electrode 20 and the second compensation sensing electrode 25 can sense the signal source on the scan electrode 12 and/or the source electrode 13 of the display module as a reference signal of the touch sensing electrode. For comparison and filtering of noise. 3A and 3B are diagrams showing a manner of reducing interference signals of a capacitive touch controller according to a preferred embodiment of the present invention. As shown in FIGS. 3A and 3B, the scan electrode 12 is spaced apart from the data electrode 13 by a vertical distance. Data electrode 13 The display signals s1~s7 are directly or indirectly coupled to the touch electrodes 31 and 32 of the capacitive touch substrate to cause noise. Because of the setting of the compensation sensing electrode 20, the display signals s1 to s7 on the data electrode 13 are also coupled to the compensation sensing electrode 20. Moreover, the coupling signal of the compensation sensing electrode 20 is synchronized with the coupling signal on the touch electrode of the capacitive touch substrate and has a corresponding intensity relationship. Therefore, the two coupling signals can be operated and deducted, so that The interference noise caused by the display is reduced or eliminated. For example, the waveform of the compensation signal Vref approximates the waveform of the signal Rx of the receiving electrode of the touch electrode or has a certain relationship. After the signal Rx+ coupled signal-compensation signal* gain value of the receiving electrode, the original or similar can be reproduced. The original touch signal reduces or eliminates noise interference.

It is assumed that the capacitance sensed by the touch substrate is C + △ C _touch + Δ C _{display_naise} without compensating the sensing electrode, wherein Δ C _touch indicates the capacitance change caused by the touch behavior, and Δ C _{display_noise} indicates that the display is coupled from the display. The noise. Then, in the case of the compensation sensing electrode, the capacitance sensed by the touch substrate becomes C + Δ C _touch + Δ C _{display_noise} - α Δ C _{display_sen sin g} , where α is a coefficient, which is electrically connected to the touch display Signal and design parameters are related, including but not limited to position, time, intensity and phase. Δ C _{display_sen sin g} represents the amount of change in capacitance caused by the coupling of the sensing electrode and the data electrode 13. By adjusting the gain value α , Δ C _{display_noise} coupled from the display can be effectively eliminated. In detail, assuming that the first coupled signal is Sc1(t), the partitioned first coupled signal is Sc1 _x (t), and the third coupled signal is Sc3(t), then the capacitive touch signal Sc2 _mn (t)= CT _mn (t)+S _mn 2(t)+S _n (t), where m,n represents the position of the sensing point of the touch sensor, CT _mn (t) represents the emission and touch signal, Sn(t) On behalf of other noise, S _mn 2(t) represents receiving noise from the display. In this way, the processed touch signal=Sc2 _mn (t)-f ₁ (m,n,t,i,ψ,c)×Sc1 _x (t)-f ₂ (m,n,t,i, ψ, c) × Sc3(t), where f ₁ represents a gain value function, f ₂ represents another gain value function, and m, n, t, i, ψ, c represent position, time, intensity, phase, and The constants are variables in the f1 and f2 functions. Regarding the layout of the compensation electrode, it is conceivable to adopt: (1) a layout covered by other electrodes to avoid coupling of the touch scan signal; (2) layout of the gate electrode replacement method; (3) sharing compensation between the scan electrode and the data electrode The layout of the electrodes; and (4) the design of the compensation electrodes in the sub-regions.

According to the above description, it can be known that the first compensation sensing electrode 20 and the second compensation sensing electrode 25 can also be omitted, and the compensation signal can be obtained by using the calculation method in the display module 10, as illustrated. .

FIG. 4 shows a schematic diagram of a touch display 1' according to another embodiment of the present invention. As shown in FIG. 4 , the touch display 1 ′ of the embodiment includes a display module 10 and a touch module 30 . The display module 10 includes a common electrode 11, a scan electrode 12, a data electrode 13, and a pixel electrode 14. The scan electrodes 12 are spaced apart from the data electrodes 13 by a vertical distance. These pixel electrodes 14 are disposed on one side of the common electrode 11. The gate driver 18 and the data driver 19 of the display module 10 are electrically connected to the control circuit 15 of the display module 10. The control circuit 15 controls the operation of the gate driver 18 and the data driver 19, so that the control circuit 15 also knows the electrical signals (such as voltage) of each of the scan electrodes and the data electrodes. The control circuit 15 is further configured to generate a first compensation signal Sc4 according to the plurality of electrical signals of the data electrodes 13. The touch module 30 includes a plurality of touch electrodes 31, 32 and a receiver 33 coupled to a portion of the touch electrodes 31, 32. The receiver 33 is electrically connected to the display module 10, and receives the plurality of coupling signals Sc2 and the first compensation signal Sc4 coupled from the touch electrodes 31, 32, and performs the coupling signal Sc2 and the first compensation signal Sc4 according to the signals. The operation is performed to obtain a touch signal representing a touch position. Similarly, the control circuit 15 of the display module 10 generates a second compensation signal Sc5 according to the plurality of electrical signals of the scan electrodes 12. The receiver 33 performs operations according to the coupling signal Sc2, the first compensation signal Sc4, and the second compensation signal Sc5 to obtain a touch signal representing a touch position. The data signal output by the data driver 19 can be calculated as a first compensation signal Sc4, or SS(t)=g(Ss1(t), . . . , Ssmn(t)), and the scan of the output of the gate driver 18. The signal can be calculated as a second compensation signal Sc5, or SG(t) = f(Sg1(t), ..., Sgmn(t)). In this way, the processed touch signal=Sc2 _mn (t)-f ₁ (m,n,t,i, ψ,c)×SG(t)-f ₂ (m,n,t,,ψ, c) × SS(t). Therefore, such a design can also obtain the effects of the present invention.

FIG. 5 shows a schematic diagram of a first compensation sensing electrode in accordance with yet another embodiment of the present invention. In Figure 5, a sub-regional compensation electrode design is presented. Since the touch electrodes may have regional differences, the compensation sensing electrodes may be cut into a plurality of segments. Therefore, the first compensation sensing electrode 20 includes a plurality of segments, each segment being electrically connected to the receiver 33 to transmit the first coupling signal Sc1 of the segment to the receiver 33, preventing the first coupling signal Sc1 of the entire region from being coupled to Together, this can achieve better interference reduction.

According to the above embodiment of the present invention, the touch signal may be compensated according to the electrical signal when the display module performs the display action to perform a touch sensing action to obtain a touch signal representing one or more touch positions, or on the display. The compensation sensing electrode can provide a synchronous compensation sensing signal related to the time and intensity of the noise on the gate of the capacitive touch sensor coupled with the scanning signal on the gate of the display and the display signal on the source electrode, and can be based on The relationship between time and intensity, the noise of the capacitive touch sensor electrode coupled to the scan signal on the gate of the display and the display signal on the source electrode. By constructing more than one compensation sensing electrode on the display, a capacitance is formed between the compensation sensing electrode and the gate electrode and the source electrode so that the signals of the gate electrode and the source electrode can also be coupled to the compensation sensing electrode. Since the structure of the compensation sensing electrode and the gate electrode and the source electrode is similar to the structure of the electrode on the capacitive touch sensor and the gate electrode and the source electrode of the display, the coupling signal on the sensing electrode and the capacitive touch are compensated. The coupling signal on the device is similar, so that a signal related to the noise signal on the capacitive touch sensor in time and intensity can be provided as a basis for judging the touch compensation sensing signal and the display noise, and using the comparison. The circuit instantly filters or subtracts the noise in the electrode signal of the capacitive touch sensor to improve the signal-to-noise ratio of the capacitive touch signal and improve the sensing performance of the capacitive touch sensor.

The specific embodiments set forth in the detailed description of the preferred embodiments are only used The technical contents of the present invention are not limited to the above-described embodiments, and various changes and modifications may be made without departing from the spirit and scope of the invention.

Cc1‧‧‧first coupling capacitor

Cc3‧‧‧3rd coupling capacitor

Sc1‧‧‧ first coupled signal

Sc2‧‧‧Second coupled signal

Sc3‧‧‧ third coupled signal

Se‧‧‧ transmitting signal

1‧‧‧ touch display

10‧‧‧ display module

11‧‧‧Common electrode

12‧‧‧Scan electrode / gate electrode

13‧‧‧Data electrode/source electrode

14‧‧‧ pixel electrodes

18‧‧‧gate driver

19‧‧‧Data Drive

20‧‧‧First compensation induction electrode

25‧‧‧Second compensation induction electrode

30‧‧‧Touch Module

31, 32‧‧‧ touch electrodes

33‧‧‧ Receiver

34‧‧‧transmitter

Claims (11)

A touch display capable of reducing interference signals of a capacitive touch sensor, comprising: a display module for performing a display operation of displaying data; and a touch module electrically connected to the display module and including at least a compensation sensing electrode, the compensation signal on the compensation sensing electrode is used to compensate the signal of the touch electrode on the capacitive touch sensor, so that the noise of the touch electrode is filtered or reduced to improve the signal-to-noise ratio of the capacitive touch signal (Signal-to-Noise Ratio) and improved sensing performance of capacitive touch sensors. The touch display device of claim 1, wherein the display module comprises a common electrode, a plurality of lateral scanning electrodes, a plurality of longitudinal data electrodes, and a plurality of pixel electrodes, and the scanning electrodes are The data electrodes are separated by a vertical distance, and the pixel electrodes are disposed on one side of the common electrode; and the touch module includes: a first compensation sensing electrode that traverses the data electrodes and is located at the data electrodes Forming at least one side of the electrode to form a plurality of first coupling capacitors with the data electrodes; and a plurality of touch electrodes and a receiver coupled to a portion of the touch electrodes, the receiver being electrically connected to the first Compensating for the sensing electrodes, and receiving a plurality of second coupling signals coupled from the touch electrodes, and a plurality of first coupling signals from the first compensation sensing electrodes and representing the first coupling capacitors, and according to the The second coupled signal is compared to the first coupled signals to obtain a touch signal representative of one or more touch locations. The touch display device of claim 2, wherein the display module comprises: a lower substrate, the scan electrodes, the data electrodes, and the pixel electrodes are formed on an upper surface of the lower substrate; And an upper substrate, the common electrode Forming on a lower surface of the upper substrate or the upper surface of the lower substrate and facing the lower substrate. The touch display module of claim 3, wherein the touch module further comprises: a touch substrate, wherein the touch electrodes are formed on the touch substrate; and a transmitter connected to the The touch electrodes are configured to emit a transmit signal to the touch electrodes to generate the second coupled signals. The touch display device of claim 3, wherein the touch electrodes are formed on an upper surface of the upper substrate; the touch electrodes are formed on the lower surface of the upper substrate; The touch electrodes are respectively formed on the lower surface of the upper substrate and an upper surface of the upper substrate; or the touch electrodes are respectively formed on the upper surface of the lower substrate and the upper substrate On the surface. The touch display of claim 2, wherein the first compensation sensing electrode comprises a plurality of segments, each segment being electrically connected to the receiver. The touch display of claim 2, wherein the second coupled signals are generated by the touch electrodes; or the second coupled signals are generated by the touch electrodes and an object. The touch display module of claim 2, wherein the touch module further comprises: a second compensation sensing electrode traversing the scan electrodes and located on at least one side of the scan electrodes to The scan electrodes form a plurality of third coupling capacitors, the receiver is electrically connected to the second compensation sensing electrodes, and receives a plurality of second coupling signals coupled from the touch electrodes, and the second compensation sensing electrodes And representing a plurality of third coupled signals of the third coupling capacitors, and according to the second coupling signals The signals are operated with the first coupled signals and the third coupled signals to obtain a touch signal representative of one or more touch locations. The touch display of claim 2, wherein the receiver has a function of transmitting and receiving signals. A touch display capable of reducing interference signals of a capacitive touch sensor, comprising: a display module comprising a common electrode, a plurality of scan electrodes, a plurality of data electrodes, and a plurality of pixel electrodes, wherein the scan electrodes The pixel is disposed on a side of the common electrode, and the display module generates a first compensation signal according to the plurality of electrical signals of the data electrodes; and a touch module The receiver includes a plurality of touch electrodes and a receiver coupled to a portion of the touch electrodes, the receiver is electrically connected to the display module, and receives a plurality of coupled signals coupled from the touch electrodes. And the first compensation signal, and the first compensation signal is operated according to the coupled signals to obtain a touch signal representing one of the one or more touch positions. The touch display of claim 10, wherein the display module generates a second compensation signal according to the plurality of electrical signals of the scan electrodes, and the receiver is configured according to the coupled signals, the first The compensation signal and the second compensation signal are operated to obtain a touch signal representing one of the one or more touch positions.